Patent Grant
11640221
Embodiments described herein relate generally to a sensor device, an input device and a method.
In general, as an interface of a display device, a sensor that detects contact or proximity of an object such as a finger (for example, a touch panel) has been put into practical use.
Furthermore, in recent years, it has been disclosed that an input device is disposed (attached) on a touch panel and used.
In this case, a user can operate the input device disposed on the touch panel, but it is necessary to detect an operation of the user on the input device with high accuracy.
In general, according to one embodiment, a sensor device includes a touch panel including a plurality of electrodes, an input device configured such that a resonant circuit including a first conductive material and a second conductive material is covered with a non-conductive material, a magnetic field generation source disposed at a position overlapping the touch panel and configured to generate a magnetic field, and a sensor controller configured to control the touch panel. Each of the first conductive material and the second conductive material is capacitively coupled to at least one of the plurality of electrodes included in the touch panel. The resonant circuit is electromagnetically coupled to the magnetic field generation source so as to resonate based on a magnetic field generated by the magnetic field generation source. The sensor controller is configured to detect positions of the first conductive material and the second conductive material on the touch panel by applying a voltage to each of the plurality of electrodes included in the touch panel according to an operation of the magnetic field generation source.
Various embodiments will be described hereinafter with reference to the accompanying drawings. The disclosure is merely an example, and proper changes within the spirit of the invention, which are easily conceivable by a skilled person, are included in the scope of the invention as a matter of course. In addition, in some cases, in order to make the description clearer, the widths, thicknesses, shapes, etc., of the respective parts are schematically illustrated in the drawings, compared to the actual modes. However, the schematic illustration is merely an example, and adds no restrictions to the interpretation of the invention. Besides, in the specification and drawings, the same or similar elements as or to those described in connection with preceding drawings or those exhibiting similar functions are denoted by like reference numerals, and a detailed description thereof is omitted unless otherwise necessary.
As the electrostatic capacitance touch panel 2, for example, there is a touch panel that performs self-capacitive type touch detection and mutual-capacitive type touch detection. In the present embodiment, a touch panel 2 that performs self-capacitive type touch detection (hereinafter, referred to as a self-capacitive type touch panel 2) will be described.
Although not illustrated in
In addition, the sensor device 1 according to the present embodiment further includes an input device used by being disposed (attached) on the touch panel 2. The input device in the present embodiment includes, for example, input devices 3a to 3d.
The input device 3a is, for example, an input device configured as a knob rotatable about a rotation axis. A user can perform an operation of rotating the input device 3a (knob) by disposing the input device 3a on the touch panel 2.
The input device 3b is an input device configured as a finger grip rotatable about a rotation axis. A user can perform an operation of rotating the input device 3b (finger grip) by disposing the input device 3b on the touch panel 2.
The input device 3c is an input device configured as a button capable of switching between a pressed state (first state) and an unpressed state (second state). A user can perform an operation of pressing the input device 3c (button) by disposing the input device 3c on the touch panel 2.
The input device 3d is an input device configured as a slider including a member (first member) formed to be elongated at least unidirectionally and a member (second member) formed to be slidable along the member. A user can perform an operation of sliding the second member of the input device 3d (slider) with respect to the first member by disposing the input device 3d on the touch panel 2.
In the example illustrated in
The touch panel 2 is a self-capacitive type touch panel as described above, and includes a plurality of transparent electrodes (hereinafter, referred to as drive electrodes) 21. The plurality of drive electrodes 21 are arrayed in a matrix in a touch detection area 2a that detects contact or proximity of an object to the touch panel 2. Specifically, the plurality of drive electrodes 21 are disposed, for example, in a first direction X and are also disposed in a second direction orthogonal to the first direction X. The touch detection area 2a is an area that is coincident with a display area of the display device on which the touch panel 2 is mounted, for example. The plurality of drive electrodes 21 are connected to the sensor controller 4 via wiring.
The input device 3 is disposed on the touch panel 2. The input device 3 may be at least one of the input devices 3a to 3d illustrated in
The input device 3 is disposed on the touch panel 2, and an area 2b of the touch detection area 2a where the input device 3 is disposed (that is, an area overlapping the input device 3) is referred to as an input device area (first area) for convenience. On the other hand, an area 2c other than the input device area 2b in the touch detection area 2a is referred to as an input device outer area (second area) for convenience.
The sensor controller 4 detects an operation of the user on the input device 3 by applying a predetermined voltage (drive signal COM) to each of the plurality of drive electrodes 21. Furthermore, the sensor controller 4 can also detect, for example, contact or proximity of a user's finger (that is, an operation of the user with the finger) with respect to the input device outer area 2c. In the present embodiment, the description will be given assuming that the operation is performed with the user's finger other than the input device 3, but an operation using another object such as a pen instead of the user's finger may be performed.
The detection result by the sensor controller 4 is output to, for example, an external host device 10 or the like. In the host device 10, processing according to the detection result (operation of the user) is executed.
A plurality of pixels (not illustrated) are arrayed in a matrix in the display area of the display device on which the touch panel 2 is mounted. Each of the plurality of pixels includes a pixel switch (thin film transistor (TFT)), a pixel electrode, and the like. The sensor controller 4 is connected to a gate drive circuit 5 and the like, and supplies a gate control signal to (a gate electrode of) the pixel switch included in each of the plurality of pixels via the gate drive circuit 5. As a result, the sensor controller 4 writes, for example, an image signal output from the host device 10 to each of the plurality of pixels via a signal line, and displays an image in the display area of the display device.
That is, in the present embodiment, the sensor controller 4 functions as a display and touch detection IC (drive unit) that performs an operation of displaying an image on the display device (display area) and an operation of detecting a position of an object on the touch panel 2 (that is, detecting the operation of the user). In the following description, the operation of displaying an image on the display device (first operation) is referred to as a display/write operation for convenience. In addition, in the following description, the operation of detecting the position of the object on the touch panel 2 (second operation) is referred to as a touch detection operation for convenience.
Each of the plurality of drive electrodes 21 described above may also be used as an electrode for image display (common electrode).
The first substrate SUB1 and the second substrate SUB2 are bonded by a sealant SE. The liquid crystal layer LC is held between the first substrate SUB1 and the second substrate SUB2.
The display panel PNL has the touch panel 2 of the sensor device 1 built therein. That is, the first substrate SUB1 includes the drive electrodes (common electrodes) 21 of the touch panel 2 and pixel electrodes PE. One drive electrode 21 faces, for example, the plurality of pixel electrodes PE.
An optical element OD1 including a polarizer PL1 is located between the first substrate SUB1 and the illumination device IL, and is bonded to the first substrate SUB1. An optical element OD2 including a polarizer PL2 is located between the second substrate SUB2 and a cover member CV (cover glass), and is bonded to the second substrate SUB2. The cover member CV is bonded to the optical element OD2 by a transparent adhesive AD.
Although not illustrated in
The input device 3 is provided (disposed) on a surface CVa of the cover member CV. In the present embodiment, the input device 3 includes two conductive materials (first conductive material and second conductive material) 31a and 31b, and the conductive materials 31a and 31b are covered with a non-conductive material 32. The conductive materials 31a and 31b are in contact with, for example, the touch panel 2 (cover member CV) in a state where the input device 3 is disposed on the touch panel 2. That is, when the input device 3 is disposed on the touch panel 2, the touch panel 2 (sensor controller 4) can detect contact or proximity (that is, touch) by the conductive materials 31a and 31b included in the input device 3.
In
The input device 3 includes a fixing body 33 illustrated in
Although
In a case where the input device 3 is disposed on the touch panel 2 as described above, for example, an operation of a user corresponding to the positions of the conductive materials 31a and 31b on the touch panel 2 that change by rotating the input device 3 (knob) is detected. Specifically, for example, when the position of the conductive material 31a (or 31b) on the touch panel 2 moves from the first position to the second position, the touch panel 2 (sensor controller 4) can detect an operation of rotating the input device 3 so that the position of the conductive material 31a on the touch panel 2 moves from the first position to the second position.
Here, the input device 3 in the present embodiment may be directly operated with a user's finger (that is, with bare hands), for example, but it is also assumed that the input device 3 may be operated by a non-conductive material such as a glove. Since it is complicated to perform different operations (touch detection operations) between the case of being directly operated with a finger and the case of being operated with a glove or the like, in the present embodiment, the conductive materials 31a and 31b described above are not electrically connected to the outside of the input device 3.
However, as an operation of a user on the input device 3 (that is, the positions of the conductive materials 31a and 31b on the touch panel 2) is detected based on a change in self-electrostatic capacitance of the drive electrodes 21 when the conductive materials 31a and 31b come into contact with or come close to the touch panel 2, in a case where the conductive materials 31a and 31b are not electrically connected to the outside as described above, a detection value (sensor signal) for the conductive materials 31a and 31b decreases, which causes error detection.
For this reason, in the present embodiment, a resonant circuit including the conductive materials 31a and 31b is manufactured inside the input device 3, and the touch detection operation is performed based on an electric potential change due to resonance generated by electromagnetic resonance.
In this case, in the present embodiment, as illustrated in
The magnetic field generation source 6 may be provided outside the touch panel 2 or may be incorporated in the touch panel 2.
In addition, the resonant circuit (inductor L) provided inside the input device 3 is magnetically coupled to the magnetic field generation source 6 so as to resonate based on the magnetic field generated by the magnetic field generation source 6 when the input device 3 is disposed on the touch panel 2 or when the input device 3 disposed on the touch panel 2 is operated.
Next, an example of a circuit configuration of a resonant circuit provided inside the input device 3 will be described with reference to
As illustrated in
In the resonant circuit provided inside the input device 3, the inductor L and the capacitor C are connected in parallel between the conductive materials 31a and 31b. In the resonant circuit illustrated in
The inductor L included in the resonant circuit described above functions as an electromagnetic coupling unit when the magnetic field generation source 6 generates a magnetic field.
In the present embodiment, for example, a change (movement) in the position of the capacitive coupling unit with respect to the touch detection area 2a (drive electrode 21) when a user operates the input device 3 is detected via such a resonant circuit. A change in the area (that is, the contact area) of the capacitive coupling unit may be detected.
A basic principle of the touch detection operation using the resonant circuit provided inside the input device 3 will be described below with reference to
In the present embodiment, since the self-capacitive type touch detection (operation) is performed, the drive electrode 21 is alternately connected to a predetermined voltage (drive voltage) Vdd and a detector 23 (that is, the connection is switched) via a switch 22 as illustrated in
Here, the voltage of the drive electrode 21 disposed at a position facing the conductive material 31a (capacitive coupling unit) is V1, the voltage of the conductive material 31b (capacitive coupling unit) is V2, and the voltage of the drive electrode 21 disposed at a position facing the conductive material 31b is V3. In the present embodiment, each of the plurality of drive electrodes 21 is simultaneously driven (that is, Vdd is simultaneously applied to each of the plurality of drive electrodes 21).
As illustrated in
Here,
In the present embodiment, as illustrated in
First, the electromagnetic resonance period will be described with reference to
Here, when time t12 (that is, half the period of resonance) elapses, the direction of the current flowing through the inductor L of the input device 3 becomes opposite to that at the time t11.
Furthermore, since VMF is switched (changed) from high to low at the time t12, an induced electromotive force is generated in the inductor L, but the direction thereof is opposite to that at the time t11.
In the electromagnetic resonance period, the resonance amplitude increases by repeating such overlapping.
Next, the detection period will be described with reference to
Here, in the example illustrated in
Here, when the switch 22 (that is, V1 and V3) is switched to the detector 23 side at the time t22, the electric potential of the input device 3 changes similarly to V1 and V3, but the electric potential difference between both edges of LC in the resonant circuit does not change, so that resonance continues as described above.
In this case, since V2 increases during the period from the time t22 to time t23, the current flows from the input device 3 side to the detector 23 side, and the electric potential of the output decreases.
In the detection period, such an operation is repeated, so that a detection value (output) as illustrated in
Here, the detection value in the drive electrode 21 disposed at the position facing the conductive material 31b has been described, but the same applies to the detection value in the drive electrode 21 disposed at the position facing the conductive material 31a.
Although it has been described here that the detection period is provided after the electromagnetic resonance period, in the present embodiment, it is sufficient that the voltage (Vdd) is applied to each of the plurality of drive electrodes 21 included in the touch panel 2 according to the operation of the magnetic field generation source 6, and the electromagnetic resonance period and the detection period described above may overlap.
Next, with reference to
Here, the capacitance (electrostatic capacitance) between the user's finger and the drive electrode 21 on the touch panel 2 side is C1, and the capacitance on the detector 23 side is C2.
When the switch 22 is connected to the Vdd side at time t31 illustrated in
Next, when the switch 22 is connected to the detector 23 side at the time t32, the electric potential of the system of the drive electrode 21 becomes GND due to an imaginary short. At this time, since there is no electric potential difference, C1 has no charge. Therefore, the charged charge q is charged to C2, and an electric potential difference is generated between both edges of C2.
In a case where the drive electrode 21 and GND hold the capacitance, negative charges are charged by repeating the operation described above.
Even when the capacitive coupling unit capacitively coupled to the drive electrode 21 is not GND, if an electric potential difference is generated at both edges of C1, charges are similarly charged.
That is, for example, even in a configuration in which a resonant circuit is not provided inside the input device 3 and the input device 3 holds only conductive materials, charges can be charged, but a detection value in this case is small.
On the other hand, in the present embodiment, the detection value can be increased by the configuration in which the resonant circuit including the conductive materials 31a and 31b is provided inside the input device 3 as described above.
Here, the touch panel 2 generally detects a change from a state when power of the touch panel 2 is turned on (that is, at the time of startup). For this reason, when the input device 3 is already disposed on the touch panel 2 at the time when the power of the touch panel 2 is turned on, the initial state (that is, the initial positions of the conductive materials 31a and 31b) of the input device 3 cannot be detected.
However, in the present embodiment, due to the configuration in which the resonant circuit described above is provided inside the input device 3, for example, even in a state where the input device 3 (that is, the conductive materials 31a and 31b) is disposed at the same position, the detection value is different between a case where the touch detection operation is performed without operating the magnetic field generation source 6 and a case where the touch detection operation is performed by operating the magnetic field generation source 6.
Hereinafter, with reference to
As illustrated in the upper part of
In the present embodiment, by using the fact that different detection values are obtained between the touch detection operation in which the magnetic field generation source 6 is operated and the touch detection operation in which the magnetic field generation source 6 is not operated as described above, the initial state of the input device 3 (the initial positions of the conductive materials 31a and 31b) is detected when the power of the touch panel 2 (the display device DSP on which the sensor device 1 is mounted) is turned on.
Hereinafter, an example of a processing procedure of the sensor controller 4 when an operation of a user is detected will be described with reference to a flowchart in
When the power of the touch panel 2 is turned on, the sensor controller 4 performs a baseline detection operation (step S1). In the baseline detection operation, by applying a voltage (drive voltage) to each of the plurality of drive electrodes 21 included in the touch panel 2 without operating the magnetic field generation source 6, a detection value in each drive electrode 21 is acquired as a baseline.
When the process of step S1 is executed, the sensor controller 4 performs a touch detection operation (step S2). In the touch detection operation, the magnetic field generation source 6 is operated to apply a voltage (drive voltage) to each of the plurality of drive electrodes 21 included in the touch panel 2, whereby a detection value (hereinafter, referred to as a detection line) in each drive electrode 21 is acquired.
Next, the sensor controller 4 calculates a difference (Diff) between the detection line acquired by executing the process of step S2 and the baseline acquired by executing the process of step S1.
Here, as described above, in the case where the input device 3 is disposed on the touch panel 2 at the time when the power of the touch panel 2 is turned on, the detection value (detection value in each of the drive electrodes 21 disposed at the positions facing the conductive materials 31a and 31b) acquired in the baseline detection operation in which the magnetic field generation source 6 is not operated is different from the detection value (detection value in each of the drive electrodes 21 disposed at the positions facing the conductive materials 31a and 31b) acquired in the touch detection operation in which the magnetic field generation source 6 is operated.
For this reason, in the present embodiment, by calculating the difference between the detection line and the baseline as described above, the positions of the drive electrodes 21 where different detection values are acquired between the case where the baseline detection operation is performed and the case where the touch detection operation is performed can be detected as the positions of the conductive materials 31a and 31b. In this case, for example, the positions of the drive electrodes 21 where the detection values in which the difference is equal to or larger than a predetermined value (hereinafter, referred to as a threshold) are acquired are detected. The positions of the conductive materials 31a and 31b detected in this manner are represented by coordinate values on the touch panel 2 (touch detection area 2a).
Here, the sensor controller 4 determines whether or not the difference between the detection line and the baseline calculated as described above is equal to or larger than a threshold (that is, whether or not the input device 3 is disposed on the touch panel 2) (step S3).
When it is determined that the difference is equal to or larger than the threshold (YES in step S3), the sensor controller 4 detects the positions of the drive electrodes 21 (that is, the positions of the conductive materials 31a and 31b included in the input device 3) where the detection values in which the difference is equal to or larger than the threshold are acquired, and outputs the positions (coordinate values) to, for example, the host device 10 (step S4). When the process of step S4 is executed, the process returns to step S2 and the process is repeated.
Here, the baseline described above is necessary for detecting an object in contact with or in proximity to the touch panel 2, but there is a possibility that the detection value (detection line) in the touch detection operation changes according to, for example, a change in environment. For this reason, it is preferable that the baseline compared with the detection line is periodically updated.
For this reason, when it is determined in step S3 that the difference is not equal to or larger than the threshold value (NO in step S3), the sensor controller 4 updates the baseline detected in step S1 (step S5). In this case, the sensor controller 4 sets the detection line acquired by executing the process of step S2 as the baseline. When the process of step S5 is executed, the process returns to step S2 described above, and the process is repeated.
Assuming that the detection line is a baseline when the input device 3 is detected, for example, in a case where the input device 3 is not operated (that is, the positions of the conductive materials 31a and 31b do not change), the detection line similar to the baseline is acquired, and the positions of the conductive materials 31a and 31b cannot be detected from the difference.
For this reason, when it is determined in step S3 described above that the difference is equal to or larger than the threshold, the process of step S5 (that is, the update process of the baseline) is not executed.
Here, the description has been mainly given assuming that the initial state of the input device 3 is detected when the power of the touch panel 2 is turned on. However, for example, after the process of step S21 is executed, it is also possible to detect the position (contact position) of the user's finger with respect to the input device outer area 2c (area other than the input device area 2b).
That is, even in a case where the user's finger operates the touch panel 2 (input device outer area 2c), the difference between the detection line and the baseline is equal to or larger than the threshold, and the position of the user's finger is detected.
According to this, in the first process of the sensor controller 4 illustrated in
The first process of the sensor controller 4 described above is continuously repeated until the power of the touch panel 2 (the display device DSP on which the sensor device 1 is mounted) is turned off.
Here, although the process related to the touch detection operation of detecting an operation of the user has been mainly described in
In this case, the sensor controller 4 can perform the display/write operation and the touch detection operation in a time division manner. According to this, as shown in
Although only three are illustrated in
An example of a processing procedure of the sensor controller 4 in a case where the display/write operation and the touch detection operation are performed in a time division manner as described above will be described with reference to a flowchart in
When the power of the touch panel 2 is turned on, the process of step S11 corresponding to the process of step S1 illustrated in
Next, the sensor controller 4 performs a display/write operation (step S12). Though detailed explanations are omitted here, in the display/write operation, for example, an image signal (pixel signal) is written in each of a plurality of pixels disposed in a display area of the display device DSP, whereby an image is displayed in the display area.
When the process of step S12 is executed, the processes of steps S13 to S16 corresponding to the processes of steps S2 to S5 illustrated in
When the process of step S15 or S16 is executed, the process returns to step S12 and the process is repeated.
In a case where the display/write operation and a touch detection operation are performed in a time division manner as described above, for example, each of the plurality of drive electrodes 21 can be used also as an electrode for image display (common electrode), so that it is possible to realize slimness of the display device DSP, and the like.
Here, as described above, it is preferable that the baseline is periodically updated. However, in the processes illustrated in
Hereinafter, an example of a processing procedure of the sensor controller 4 for updating the baseline in a case where the input device 3 is disposed on the touch panel 2 will be described with reference to a flowchart in
When the power of the touch panel 2 is turned on, the processes of steps S21 to S23 corresponding to the processes of steps S11 to S13 illustrated in
When the process of step S23 is executed, the difference between the detection line and the baseline is calculated as described above, and the positions of the conductive materials 31a and 31b provided in the input device 3 or the position of the user's finger can be detected based on the difference.
Here, since the detection values in the drive electrodes 21 disposed at the positions facing the conductive materials 31a and 31b are based on resonance in the resonant circuit, the detection values are different from the detection value in the drive electrode 21 disposed at the position facing the user's finger. For this reason, the sensor controller 4 can determine whether the positions of the conductive materials 31a and 31b (hereinafter, referred to as a position of the input device 3) have been detected or the position of the user's finger (hereinafter, referred to as a touch position) has been detected based on the difference between the detection line and the baseline described above. Whether the position of the input device 3 has been detected or the touch position has been detected may be determined by, for example, a pattern of the detection value or the like.
Therefore, when the process of step S23 is executed, the sensor controller 4 determines whether or not the position of the input device 3 has been detected (step S24).
When it is determined that the position of the input device 3 has been detected (YES in step S24), the sensor controller 4 specifies an area on the touch panel 2 where the input device 3 is disposed (that is, the input device area 2b) (step S25). Here, since the positions (coordinate values) of the conductive materials 31a and 31b included in the input device 3 are detected, the coordinate values and the like of the area occupied by the input device 3 on the touch panel 2 when the conductive materials 31a and 31b are disposed at the positions on the touch panel 2 corresponding to the coordinate values are specified as the input device area 2b.
Next, the sensor controller 4 determines whether or not the touch position has been detected (step S26).
When it is determined that the touch position has not been detected (NO in step S26), the sensor controller 4 updates the baseline corresponding to the input device outer area 2c (step S27).
In this case, the sensor controller 4 specifies an area excluding the input device area 2b specified in step S25 described above from the touch detection area 2a as the input device outer area 2c. The sensor controller 4 sets, as a baseline corresponding to the input device outer area 2c, the detection value in the drive electrode 21 disposed at a position overlapping the input device outer area 2c (that is, the detection line corresponding to the input device outer area 2c) among the detection values acquired by executing the process of step S23.
When the process of step S27 is executed, the baseline corresponding to the input device outer area 2c is updated, but the baseline corresponding to the input device area 2b is not updated.
When the process of step S27 is executed, the process returns to step S22 and the process is repeated. On the other hand, when it is determined that the touch position has been detected (YES in step S26), the process of step S27 is not executed, and the process returns to step S22 and the process is repeated.
When it is determined in step S24 described above that the position of the input device 3 has not been detected (NO in step S24), the sensor controller 4 determines whether or not the touch position has been detected (step S28).
When it is determined that the touch position has not been detected (NO in step S28), the sensor controller 4 updates the baseline corresponding to the entire touch detection area 2a (step S29). The process of step S29 corresponds to the process of step S16 illustrated in
When it is determined in step S28 that the touch position has been detected (YES in step S28), the process returns to step S22 and the process is repeated.
According to the third process of the sensor controller 4 illustrated in
According to this, by distinguishing the update of the baseline between the area where the input device 3 is disposed (input device area 2b) and the area other than the area (input device outer area 2c), the baseline corresponding to the area where the touch position (that is, the position of the user's finger) is detected can be updated even when the input device 3 is continuously disposed.
Although not illustrated in
Here, when the third process of the sensor controller 4 described above is executed, it is possible to update the baseline corresponding to the input device outer area 2c, but it is not possible to update the baseline corresponding to the input device area 2b while the input device 3 is continuously disposed.
Hereinafter, an example of a processing procedure of the sensor controller 4 for updating the baseline corresponding to the input device area 2b will be described with reference to a flowchart in
When the power of the touch panel 2 is turned on, the processes of steps S31 to S35 corresponding to the processes of steps S21 to S25 illustrated in
When the process of step S35 is executed, the sensor controller 4 performs a display/write operation (step S36). The process of step S36 is similar to the process of step S32.
Next, the sensor controller 4 performs a second touch detection operation (step S37). In the first touch detection operation in step S33 described above, the magnetic field generation source 6 is operated to drive each of the plurality of drive electrodes 21, but in the second touch detection operation in step S37, each of the plurality of drive electrodes 21 is driven without operating the magnetic field generation source 6. As a result, the sensor controller 4 acquires a detection value in each drive electrode 21 driven without operating the magnetic field generation source 6 as a detection line.
In a case where the second touch detection operation is performed, the touch position can be detected based on a difference between the detection line acquired by executing the process of step S37 and the baseline acquired by executing the process of step S31. On the other hand, since the plurality of drive electrodes 21 are driven without operating the magnetic field generation source 6 in a baseline detection operation and the second touch detection operation, the position of the input device 3 cannot be detected in the second touch detection operation.
When the process of step S37 is executed, the sensor controller 4 updates the baseline corresponding to the input device area 2b (step S38). In this case, the sensor controller 4 sets, as a baseline corresponding to the input device area 2b, the detection value in the drive electrode 21 disposed at a position overlapping the input device area 2b (that is, the detection line corresponding to the input device area 2b) specified in step S35 among the detection values acquired by executing the process of step S37.
Next, the processes of steps S39 and S40 corresponding to the processes of steps S26 and S27 illustrated in
When it is determined in step S39 that the touch position has been detected (YES in step S39), the process of step S40 is not executed, and the process returns to step S32 and the process is repeated. When step S40 is executed, the process returns to step S32 and the process is repeated.
When it is determined in step S34 described above that the position of the input device 3 has not been detected (NO in step S34), the processes of steps S41 and S42 corresponding to the processes of steps S28 and S29 illustrated in
When it is determined in step S41 that the touch position has been detected (YES in step S41) or when the process of step S42 has been executed, the process returns to step S32 and the process is repeated.
According to the fourth process of the sensor controller 4 illustrated in
That is, by performing the touch detection operation separately for the drive to cause resonance and the drive not to cause resonance, it is possible to update the baseline corresponding to the input device area 2b even in a case where the input device 3 is continuously disposed.
The example illustrated in
Further, another example of a processing procedure of the sensor controller 4 for updating the baseline corresponding to the input device area 2b will be described with reference to flowcharts in
When the power of the touch panel 2 is turned on, the processes of steps S51 to S55 corresponding to the processes of steps S21 to S25 illustrated in
When the process of step S55 is executed, the sensor controller 4 updates the baseline corresponding to the input device area 2b (step S56). In this case, the sensor controller 4 sets, as a baseline corresponding to the input device area 2b, the detection value in the drive electrode 21 disposed at a position overlapping the input device area 2b (that is, the detection line corresponding to the input device area 2b) specified in step S55 among the detection values acquired by executing the process of step S53.
When the process of step S56 is executed, the processes of steps S57 and S58 corresponding to the processes of steps S26 and S27 illustrated in
Next, the sensor controller 4 performs a display/write operation (step S61). the process of step S61 is similar to the process of step S52.
When the process of step S61 is executed, the sensor controller 4 performs a second touch detection operation (step S62). The second touch detection operation in step S62 is similar to the second touch detection operation described with reference to
Here, for example, when it is determined in step S54 described above that the position of the input device 3 has been detected (that is, the input device 3 is disposed on the touch panel 2), the baseline corresponding to the input device area 2b at the time when the process of step S62 is executed is the detection value acquired in the first touch detection operation in step S53 (that is, the detection value when the magnetic field generation source 6 is operated).
On the other hand, in the second touch detection operation in step S62, a detection value when the magnetic field generation source 6 is not operated is acquired as a detection line.
In this case, for example, even when the positions of the conductive materials 31a and 31b included in the input device 3 are changed (that is, the input device 3 is operated), or even when the positions of the conductive materials 31a and 31b are maintained (that is, the input device 3 is not operated), the positions of the conductive materials 31a and 31b can be detected by calculating the difference between the detection line and the baseline corresponding to the input device area 2b.
For this reason, the sensor controller 4 can determine whether the position of the input device 3 (that is, the positions of the conductive materials 31a and 31b) has been detected (step S63).
When it is determined that the position of the input device 3 has been detected (YES in step S63), the processes of steps S64 to S67 corresponding to the processes of steps S55 to S58 described above are executed. When it is determined in step S66 that the touch position has been detected (YES in step S66) or when the process of step S67 has been executed, the process returns to step S52 and the process is repeated. On the other hand, when it is determined in step S63 that the position of the input device 3 has not been detected (NO in step S63), the processes of steps S68 and S69 corresponding to the processes of steps S59 and S60 described above are executed. When it is determined in step S68 that the touch position has been detected (YES in step S68) or when the process of step S69 has been executed, the process returns to step S52 and the process is repeated.
According to the fifth process of the sensor controller 4 illustrated in
Here, in
First, the sensor controller 4 performs a baseline detection operation (step S71). According to this baseline detection operation, a detection value in each drive electrode 21 when the magnetic field generation source 6 is not operated is acquired as a baseline.
Next, the sensor controller 4 performs a first touch detection operation (step S72). According to the first touch detection operation, a detection value in each drive electrode 21 when the magnetic field generation source 6 is operated is acquired as a detection line.
Here, since the baseline acquired by executing the process of step S71 is a detection value when the magnetic field generation source 6 is not operated, and the detection line acquired by executing the process of step S72 is a detection value when the magnetic field generation source 6 is operated, the position of the input device 3 (conductive materials 31a and 31b) can be detected by calculating a difference between the baseline and the detection line.
When the process of step S72 is executed, the sensor controller 4 updates the baseline acquired by executing the process of step S71 based on the detection line acquired by executing the process of step S72 described above (step S73).
Next, the sensor controller 4 performs a second touch detection operation (step S74). According to the second touch detection operation, a detection value in each drive electrode 21 when the magnetic field generation source 6 is not operated is acquired as a detection line.
Here, since the baseline updated in step S73 is a detection value when the magnetic field generation source 6 is operated, and the detection line acquired by executing the process of step S74 is a detection value when the magnetic field generation source 6 is not operated, the position of the input device 3 (conductive materials 31a and 31b) can be detected by calculating a difference between the baseline and the detection line.
When the process of step S74 is executed, the sensor controller 4 further updates the baseline updated in step S73 based on the detection line acquired by executing the process of step S74 described above (step S75). When the process of step S75 is executed, the process returns to step S72 and the process is repeated.
When the detection of the touch position by the user's finger is not considered, as illustrated in
Although the first to sixth processes have been described as the processes of the sensor controller 4 in the present embodiment, the sensor controller 4 may execute at least one of the first to sixth processes. In addition, which of the first to sixth processes is to be executed may be determined based on, for example, specifications, performance, or the like of the display device DSP (or the sensor device 1). Furthermore, the first to sixth processes of the sensor controller 4 may be executed in combination as appropriate.
As described above, in the present embodiment, the resonant circuit including the conductive materials 31a and 31b (first and second conductive materials) is provided inside the input device 3, and the conductive materials 31a and 31b are capacitively coupled to at least one of the plurality of drive electrodes 21 included in the touch panel 2 when the input device 3 is disposed on the touch panel 2 or when the input device 3 disposed on the touch panel 2 is operated. Further, in the present embodiment, the resonant circuit is electromagnetically coupled to the magnetic field generation source 6 so as to resonate based on the magnetic field generated by the magnetic field generation source 6 when the input device 3 is disposed on the touch panel 2 or when the input device 3 disposed on the touch panel 2 is operated. In the present embodiment, the sensor controller 4 detects the positions (coordinate positions) of the conductive materials 31a and 31b on the touch panel 2 by applying a voltage to each of the plurality of electrodes 21 included in the touch panel 2 according to the operation of the magnetic field generation source 6.
In this case, for example, the position of the conductive material 31a is detected by applying a voltage to the drive electrode 21 facing the conductive material 31a, and the position of the conductive material 31b is detected by applying a voltage to the drive electrode 21 facing the conductive material 31b. The resonant circuit in the present embodiment is configured as a circuit in which the inductor L and the capacitor C are connected in parallel between the conductive materials 31a and 31b.
In the present embodiment, with such a configuration, it is possible to increase the detection value for detecting the physical state of the input device 3, and thus, it is possible to suppress error detection on the input device 3 and to detect the operation of the user on the input device 3 disposed on the touch panel 2 with high accuracy.
When the input device 3 in the present embodiment is configured as a knob (input device 3a shown in
In the present embodiment, the description has been mainly given assuming that the input device 3 is a knob, but the input device 3 may be, for example, a finger grip (input device 3b illustrated in
Here,
In addition,
Here, the input devices 3c (button) and 3d (slider) have been described, and the input device 3b (finger grip) has an internal structure substantially similar to that of the input device 3a although the shape and size of the non-conductive material 32 are different. Accordingly, it is possible to detect an operation of the user rotating the input device 3b (finger grip).
For example, a resonant circuit including a plurality of capacitors C as illustrated in
In the present embodiment, the input device 3 disposed on the touch panel 2 may be other than the above-described input devices 3a to 3d as long as a resonant circuit including the conductive materials 31a and 31b described above is provided therein.
Further, in the present embodiment, when the power of the touch panel 2 is turned on, a voltage is applied to each of the plurality of drive electrodes 21 included in the touch panel 2 without operating the magnetic field generation source 6, thereby acquiring a baseline (first detection value in each of the plurality of drive electrodes 21). The magnetic field generation source 6 is operated to apply a voltage to each of the plurality of drive electrodes 21 included in the touch panel 2, thereby acquiring a detection line (second detection value in each of the plurality of drive electrodes 21). In the present embodiment, the positions of the conductive materials 31a and 31b are detected by comparing the baseline with the detection line.
In the present embodiment, with such a configuration, it is possible to detect an initial state (initial positions of the conductive materials 31a and 31b) of the input device 3 when the power of the touch panel 2 (display device DSP) is turned on (that is, at the time of startup), and to detect an operation of the user based on a change in the positions of the conductive materials 31a and 31b from the initial state.
Further, in the present embodiment, the plurality of drive electrodes 21 may be used also as electrodes for image display (common electrodes), and the display/write operation (first operation) and the touch detection operation (second operation) may be performed in a time division manner. According to such a configuration, it is possible to realize slimness of the display device DSP.
Furthermore, in the present embodiment, when the position of the input device 3 (conductive materials 31a and 31b) is detected but the touch position (position of another object such as a user's finger) is not detected from the input device outer area 2c, the baseline corresponding to the input device outer area 2c is updated using the detection line corresponding to the input device outer area 2c.
Further, in the present embodiment, when the position of the input device 3 is detected, the detection line (third detection value) corresponding to the input device area 2b may be acquired without operating the magnetic field generation source 6, and the baseline corresponding to the input device area 2b may be updated based on the detection line.
Furthermore, in the present embodiment, regardless of whether the position of the input device 3 is detected or not, the detection line corresponding to the touch detection area 2a may be further acquired without operating the magnetic field generation source 6 (third detection value in each of the plurality of drive electrodes 21 may be further acquired by applying a voltage to each of the plurality of drive electrodes 21 included in the touch panel 2), and the baseline may be updated based on the detection line.
In the present embodiment, with the configuration in which the process described above is executed, for example, even in a case where the detection value in each drive electrode 21 changes according to a change in environment or the like, the touch detection operation with high accuracy can be performed using an appropriate baseline.
Next, a second embodiment will be described. Although the sensor device including the self-capacitive type touch panel has been described in the first embodiment described above, the present embodiment is different from the first embodiment in that a sensor device includes a touch panel that performs mutual capacitive type touch detection (hereinafter, referred to as a mutual-capacitive touch panel).
The appearance of the sensor device according to the present embodiment is similar to that of the first embodiment described above, and thus a detailed description thereof will be omitted here.
As illustrated in
The touch panel 2 is a mutual-capacitive type touch panel, and includes a plurality of drive electrodes Tx and a plurality of detection electrodes Rx. The plurality of drive electrodes Tx are arranged spaced apart from each other unidirectionally. On the other hand, the plurality of detection electrodes Rx are arranged spaced apart from each other so as to intersect with the drive electrodes Tx. In the example illustrated in
The plurality of drive electrodes Tx are also used as, for example, electrodes for image display (common electrodes), and are connected to the display controller 4a via wiring. The plurality of detection electrodes Rx are connected to the touch controller 4b via wiring.
The input device 3 is disposed on the touch panel 2. The input device 3 may be at least one of input devices 3a to 3d illustrated in
The display controller 4a and the touch controller 4b correspond to a sensor controller that controls the touch panel 2. The display controller 4a applies a predetermined voltage (drive signal COM) to each of the plurality of drive electrodes Tx. As a result, each of the plurality of drive electrodes Tx generates capacitance (mutual-electrostatic capacitance) with the detection electrode Rx disposed at a position intersecting with the drive electrode Tx. The touch controller 4b acquires a detection value in the detection electrode Rx, and detects an operation of a user on the input device 3. Furthermore, the touch controller 4b can also detect, for example, contact or proximity of a user's finger (that is, an operation of the user with the finger) with respect to an input device outer area 2c. The detection result by the touch controller 4b is output to, for example, an external host device 10 or the like. In the host device 10, processing according to the detection result (operation of the user) is executed.
The display controller 4a is connected to a plurality of pixels disposed in a display area of a display device on which the touch panel 2 is mounted, a gate drive circuit 5, and the like, and displays an image in the display area.
Although the first substrate SUB1 includes the plurality of drive electrodes 21 in the first embodiment described above, in the present embodiment, a first substrate SUB1 includes the plurality of drive electrodes (common electrodes) Tx, and a second substrate SUB2 includes the detection electrodes Rx.
Although not illustrated in
Although
Here, the configuration of the input device 3 disposed on the touch panel 2 in the present embodiment is as described in the first embodiment described above. That is, a resonant circuit (LC circuit) including conductive materials 31a and 31b, an inductor L, and a capacitor C is provided inside the input device 3. Description of the circuit configuration of the resonant circuit is omitted here.
A basic principle of a touch detection operation using the resonant circuit provided inside the input device 3 will be described below with reference to
In the present embodiment, the mutual-capacitive type touch detection (operation) is performed, and thus the drive electrode Tx is connected to a predetermined voltage Vdd via a switch 24 as illustrated in
In
In the present embodiment, each of the plurality of drive electrodes Tx is sequentially driven. For this reason, when a voltage is applied to the drive electrode Tx disposed at a position facing the conductive material 31a, the conductive material 31a is connected to GND.
Here,
In the present embodiment, as in the first embodiment described above, an electromagnetic resonance period in which the voltage VMF is applied (that is, the magnetic field generation source 6 generates a magnetic field) in the magnetic field generation source 6 and a detection period for touch detection are provided. Since the electromagnetic resonance period is similar to that of the first embodiment described above, and thus a detailed description thereof will be omitted here.
In addition, in the detection period, when the switch 24 is switched to Vdd when V2 becomes maximum, the electric potential of V2 increases, but the resonant circuit continues the resonance generated in the electromagnetic resonance period. For this reason, the electric potential of V2 decreases.
Next, when the switch 24 is switched to GND when V2 becomes minimum, current flows from the detector 25 side to the input device 3 and Tx, and the electric potential of output increases. Since the resonant circuit continues to resonate, as the electric potential of V2 increases, current flows from the input device 3 side to the detector 25 side, and the electric potential of output decreases.
In the detection period, such an operation is repeated, so that a detection value (output) as illustrated in
Here, the detection value in the drive electrode Tx disposed at the position facing the conductive material 31b has been described, but the same applies to the detection value in the drive electrode Tx disposed at the position facing the conductive material 31a.
In addition, as described in the first embodiment described above, the electromagnetic resonance period and the detection period may overlap.
Here,
Hereinafter, an operation timing of the magnetic field generation source 6 (that is, a generation timing of a magnetic field by the magnetic field generation source 6) will be briefly described with reference to
In a case where the magnetic field generation source 6 operates to generate the magnetic field MF illustrated in
On the other hand, in a case where the magnetic field generation source 6 operates to generate the magnetic fields MF1, MF2, MF3 . . . illustrated in
In the present embodiment, the magnetic field generation source 6 may operate to generate the magnetic field MF as illustrated in
In the first embodiment described above, it is assumed that the magnetic field generation source 6 uniformly generates a magnetic field, but the magnetic field generation source 6 may generate the magnetic fields as illustrated in
The operation of the sensor device 1 (touch panel 2) when detecting the operation of the user in the present embodiment is as described in the first embodiment described above, and thus a detailed description thereof will be omitted here. A process executed by the sensor controller 4 in the first embodiment described above is executed by the display controller 4a and the touch controller 4b in the present embodiment. Specifically, a process of driving each of the plurality of drive electrodes Tx by operating the magnetic field generation source 6, a process of driving each of the plurality of drive electrodes Tx without operating the magnetic field generation source 6, and a display/write operation are executed by the display controller 4a, and other processes are executed by the touch controller 4b.
As described above, in the present embodiment, even in a case where the sensor device 1 includes the mutual-capacitive type touch panel 2, by providing the resonant circuit including the conductive materials 31a and 31b inside the input device 3, it is possible to detect the operation of the user on the input device 3 disposed on the touch panel 2 with high accuracy, as in the first embodiment described above.
Here, the sensor device 1 according to the present embodiment includes the mutual-capacitive type touch panel 2, and depending on the operation of the user on the input device 3, the conductive materials 31a and 31b included in the input device 3 may be disposed to face (overlap) the same detection electrode Rx as illustrated in
In this case, no potential is generated in the detection electrode Rx canceled by resonance of the two conductive materials 31a and 31b in opposite phases, and thus, an electric potential change due to the resonance cannot be acquired as a detection value. For this reason, the position of the input device 3 (conductive materials 31a and 31b) cannot be detected. As described in the first embodiment described above, since the position of the input device 3 can be detected even if the electric potentials of the two conductive materials 31a and 31b are the same, for example, the conductive materials 31a and 31b may face the same drive electrode Tx.
That is, in the present embodiment, when the conductive materials 31a and 31b face the same detection electrode Rx as described above, there is a possibility that the position of the input device 3 cannot be detected.
For this reason, in the present embodiment, the input device 3 is configured such that the detection electrode Rx (second electrode) facing the conductive material 31a (first conductive material) and the detection electrode Rx facing the conductive material 31b (second conductive material) are different when the input device 3 is disposed on the touch panel 2 or when the input device 3 disposed on the touch panel 2 is operated.
Here,
According to such an input device 3, as illustrated in
The input device 3 (conductive materials 31a and 31b) illustrated in
In a case where the input device 3 is a button (input device 3c), for example, if the conductive materials 31a and 31b are formed as illustrated in
Similarly, in a case where the input device 3 is a slider (input device 3d), for example, if the conductive materials 31a and 31b are formed as illustrated in
As described above, according to each embodiment, it is possible to provide a sensor device capable of detecting an operation of a user with high accuracy.
The following are additional examples of the embodiments of the present invention.
[1]
A sensor device including:
a touch panel including a plurality of electrodes;
an input device configured such that a resonant circuit including a first conductive material and a second conductive material is covered with a non-conductive material;
a magnetic field generation source disposed at a position overlapping the touch panel and configured to generate a magnetic field; and
a sensor controller configured to control the touch panel,
wherein each of the first conductive material and the second conductive material is capacitively coupled to at least one of the plurality of electrodes included in the touch panel,
the resonant circuit is electromagnetically coupled to the magnetic field generation source so as to resonate based on a magnetic field generated by the magnetic field generation source, and
the sensor controller is configured to detect positions of the first conductive material and the second conductive material on the touch panel by applying a voltage to each of the plurality of electrodes included in the touch panel according to an operation of the magnetic field generation source.
[2]
The sensor device of item [1],
wherein the plurality of electrodes include a first electrode facing the first conductive material and a second electrode facing the second conductive material when the input device is disposed on the touch panel or when the input device disposed on the touch panel is operated, and
the sensor controller is configured to detect a position of the first conductive material by applying a voltage to the first electrode, and detect a position of the second conductive material by applying a voltage to the second electrode.
[3]
The sensor device of item [1], wherein the resonant circuit is a circuit in which an inductor and a capacitor are connected in parallel between the first conductive material and the second conductive material.
[4]
The sensor device of item [1],
wherein the input device is configured as a knob that is rotatable about a rotation axis,
each of the first conductive material and the second conductive material is held by the knob and disposed on a part of a circumference around the rotation axis, and
the sensor controller is configured to detect positions of the first conductive material and the second conductive material when the knob disposed on the touch panel is rotated.
[5]
The sensor device of item [1],
wherein the input device is configured as a button capable of switching between a pressed first state and an unpressed second state,
the first conductive material and the second conductive material are disposed in the input device so as to be capacitively coupled to at least one of the plurality of electrodes included in the touch panel in the first state and so as not to be capacitively coupled to the plurality of electrodes included in the touch panel in the second state, and
the sensor controller is configured to detect positions of the first conductive material and the second conductive material when the input device is in the first state.
[6]
The sensor device of item [1],
wherein the input device is configured as a slider including a first member formed to be elongated at least unidirectionally and a second member formed to be slidable along the first member,
the first conductive material is disposed inside the first member,
the second conductive material is disposed inside the second member, and
the sensor controller is configured to detect positions of the first conductive material and the second conductive material when the second member is slid with respect to the first member.
[7]
The sensor device of item [1], wherein the sensor controller is configured to detect positions of the first conductive material and the second conductive material based on self-electrostatic capacitance of each of the plurality of electrodes included in the touch panel.
[8]
The sensor device of item [1],
wherein the plurality of electrodes included in the touch panel include a plurality of first electrodes arranged side-by-side in a second direction intersecting with a first direction so as to extend in the first direction, and a plurality of second electrodes arranged side-by-side in the first direction so as to extend in the second direction, and
the sensor controller is configured to detect positions of the first conductive material and the second conductive material based on mutual-electrostatic capacitance between the plurality of first electrodes and the plurality of second electrodes.
[9]
The sensor device of item [8],
wherein the first conductive material and the second conductive material face at least one of the plurality of first electrodes when the input device is disposed on the touch panel or when the input device disposed on the touch panel is operated,
the first conductive material and the second conductive material face at least one of the plurality of second electrodes when the input device is disposed on the touch panel or when the input device disposed on the touch panel is operated, and
a second electrode facing the first conductive material and a second electrode facing the second conductive material are different.
[10]
The sensor device of item [1],
wherein the sensor controller is configured to
acquire a first detection value in each of the plurality of electrodes included in the touch panel by applying a voltage to each of the plurality of electrodes without operating the magnetic field generation source when power of the touch panel is turned on,
acquire a second detection value in each of the plurality of electrodes included in the touch panel by operating the magnetic field generation source to apply a voltage to each of the plurality of electrodes, and
detect positions of the first conductive material and the second conductive material by comparing the first detection value with the second detection value.
[11]
The sensor device of item [10],
wherein the touch panel is mounted on a display device, and
the sensor controller is configured to perform a first operation of displaying an image on the display device and a second operation of detecting positions of the first conductive material, the second conductive material, and another object on the touch panel in a time division manner.
[12]
The sensor device of item [11],
wherein the sensor controller is configured to
update the first detection value acquired by applying a voltage to an electrode corresponding to a second area other than a first area in which the input device is disposed based on the second detection value acquired by applying a voltage to an electrode corresponding to the second area when positions of the first conductive material and the second conductive material are detected and a position of the another object is not detected from the second area, and
further detect positions of the first conductive material and the second conductive material using the updated first detection value.
[13]
The sensor device of item [12],
wherein the sensor controller is configured to
further acquire a third detection value in each of the plurality of electrodes by applying a voltage to the electrode corresponding to the first area without operating the magnetic field generation source when positions of the first conductive material and the second conductive material are detected,
update the first detection value acquired by applying a voltage to the electrode corresponding to the first area based on the third detection value, and
further detect positions of the first conductive material and the second conductive material using the updated first detection value.
[14]
The sensor device of item [10],
wherein the sensor controller is configured to
further acquire a third detection value in each of the plurality of electrodes by operating the magnetic field generation source to apply a voltage to each of the plurality of electrodes included in the touch panel,
update the first detection value based on the third detection value, and
further detect positions of the first conductive material and the second conductive material using the updated first detection value.
[15]
An input device disposed on a touch panel including a plurality of electrodes and used, the input device including:
a first conductive material;
a second conductive material;
a resonant circuit including the first conductive material and the second conductive material; and
a non-conductive material formed so as to cover the resonant circuit,
wherein each of the first conductive material and the second conductive material is capacitively coupled to at least one of the plurality of electrodes included in the touch panel,
the resonant circuit is electromagnetically coupled to a magnetic field generation source disposed at a position overlapping the touch panel so as to resonate based on a magnetic field generated by the magnetic field generation source, and
positions of the first conductive material and the second conductive material on the touch panel are detected by applying a voltage to each of the plurality of electrodes included in the touch panel according to an operation of the magnetic field generation source.
[16]
A method executed by a sensor device including a touch panel including a plurality of electrodes, an input device configured such that a resonant circuit including a first conductive material and a second conductive material is covered with a non-conductive material, a magnetic field generation source disposed at a position overlapping the touch panel and configured to generate a magnetic field, and a sensor controller configured to control the touch panel, the method including:
capacitively coupling each of the first conductive material and the second conductive material to at least one of the plurality of electrodes included in the touch panel;
electromagnetically coupling the resonant circuit to the magnetic field generation source so as to resonate based on a magnetic field generated by the magnetic field generation source;
applying a voltage to each of the plurality of electrodes included in the touch panel according to an operation of the magnetic field generation source; and detecting positions of the first conductive material and the second conductive material on the touch panel.
While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.
| Number | Date | Country | Kind |
|---|---|---|---|
| JP2019-090053 | May 2019 | JP | national |
This application is a Continuation Application of PCT Application No. PCT/JP2020/006918, filed Feb. 20, 2020 and based upon and claiming the benefit of priority from Japanese Patent Application No. 2019-090053, filed May 10, 2019, the entire contents of all of which are incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 5601489 | Komaki | Feb 1997 | A |
| 5798756 | Yoshida | Aug 1998 | A |
| 9529447 | Hodges | Dec 2016 | B2 |
| 10198106 | Katsuta | Feb 2019 | B2 |
| 10310640 | Lee | Jun 2019 | B2 |
| 10795491 | Katsurahira | Oct 2020 | B2 |
| 11513639 | Kono | Nov 2022 | B2 |
| 11513649 | Takada | Nov 2022 | B2 |
| 20040248621 | Schon | Dec 2004 | A1 |
| 20060256090 | Huppi | Nov 2006 | A1 |
| 20100066693 | Sato | Mar 2010 | A1 |
| 20100265190 | Rofougaran | Oct 2010 | A1 |
| 20100328240 | Matsubara | Dec 2010 | A1 |
| 20110090146 | Katsurahira | Apr 2011 | A1 |
| 20120169597 | Liotta | Jul 2012 | A1 |
| 20120169663 | Kim | Jul 2012 | A1 |
| 20120306824 | Horie | Dec 2012 | A1 |
| 20130141085 | Suzuki | Jun 2013 | A1 |
| 20130278554 | Ide | Oct 2013 | A1 |
| 20130328805 | Kim | Dec 2013 | A1 |
| 20140078104 | Lee | Mar 2014 | A1 |
| 20140354560 | Kim | Dec 2014 | A1 |
| 20150212634 | Pyun | Jul 2015 | A1 |
| 20150339021 | Duteil et al. | Nov 2015 | A1 |
| 20160109988 | Wang | Apr 2016 | A1 |
| 20160209957 | Jung | Jul 2016 | A1 |
| 20160224086 | Kim | Aug 2016 | A1 |
| 20160306489 | Mizuhashi | Oct 2016 | A1 |
| 20170102815 | Portmann | Apr 2017 | A1 |
| 20170108972 | Kurasawa | Apr 2017 | A1 |
| 20170111882 | Bang | Apr 2017 | A1 |
| 20180018028 | Lee | Jan 2018 | A1 |
| 20180052548 | Katsuta | Feb 2018 | A1 |
| 20180059461 | Katsuta | Mar 2018 | A1 |
| 20180307340 | Gotoh | Oct 2018 | A1 |
| 20180300009 | Kurasawa et al. | Dec 2018 | A1 |
| 20180373351 | Sawada | Dec 2018 | A1 |
| 20190025944 | Konishi | Jan 2019 | A1 |
| 20190379377 | Ju | Dec 2019 | A1 |
| 20200081557 | Togashi | Mar 2020 | A1 |
| 20200081576 | Takada | Mar 2020 | A1 |
| 20200235477 | Yamamoto | Jul 2020 | A1 |
| 20210109626 | Nishida | Apr 2021 | A1 |
| 20210141492 | Lee | May 2021 | A1 |
| 20210173545 | Kurasawa | Jun 2021 | A1 |
| 20220091697 | Miyagawa | Mar 2022 | A1 |
| 20220137722 | Hayashi | May 2022 | A1 |
| 20220137727 | Kono | May 2022 | A1 |
| 20220147189 | Kakinoki | May 2022 | A1 |
| 20220147191 | Kakinoki | May 2022 | A1 |
| 20220342503 | Kakinoki | Oct 2022 | A1 |
| 20220342506 | Hayashi | Oct 2022 | A1 |
| 20220397999 | Hayashi | Dec 2022 | A1 |
| 20220413631 | Kakinoki | Dec 2022 | A1 |
| 20230025138 | Lim | Jan 2023 | A1 |
| Number | Date | Country |
|---|---|---|
| 2013-117846 | Jun 2013 | JP |
| 2018-181099 | Nov 2018 | JP |
| 2019-067300 | Apr 2019 | JP |
| WO2017094234 | Jun 2017 | WO |
| Entry |
|---|
| International Search Report issued in International Patent Application No. PCT/JP2020/006918 dated May 19, 2020 and English translation of same. 5 pages. |
| Written Opinion issued in International Patent Application No. PCT/JP2020/006918 dated May 19, 2020. 3 pages. |
| Number | Date | Country | |
|---|---|---|---|
| 20220066597 A1 | Mar 2022 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2020/006918 | Feb 2020 | US |
| Child | 17522102 | US |
