Patent Application
20170242522
This application claims a priority to Chinese Patent Application No. 201610096547.5 on Feb. 22, 2016, the disclosure of which is incorporated in its entirety by reference herein.
The present disclosure relates to the field of the display technology, and particularly to a touch substrate, a method for manufacturing the same, a driving device, a driving method, a touch panel and a display device.
In the technical field of the display technology, a touch screen, as a new input device, has been used more and more widely in the field of the touch display screen. The touch screen products may be divided into four types as follows: an infrared touch screen, a capacitive touch screen, a resistive touch screen and a surface acoustic wave touch screen. Currently, the capacitive touch screen has become a mainstream touch screen technique due to advantages such as a long operating life, high light transmittance and capable of supporting a multi-point touch.
The capacitive touch screen has two types of structures, i.e., a projection capacitive type and a surface capacitive type. The capacitive touch screen has certain advantages compared with other touch screens. However, for the projection capacitive touch screen, regardless of being of a single-layered ITO structure or a double-layered ITO structure, it is needed to scan the x-coordinate and the y-coordinate, so that the touch power consumption is greatly improved. In addition, for most of the single-layered ITO, independent small patterns are employed, so that a relatively high process is required. And for the double-layered ITO, multiple exposures and etchings are required, so the number of processing steps is increased and the productivity is affected. For the surface capacitive touch screen, although there is no need to scan multiple times and its manufacturing process is relatively simple, the multi-point touch cannot be achieved so that the application range is limited.
An object of the present disclosure is to provide a touch substrate that performs scanning for a relatively small number of times, has a simple manufacturing process and is able to support a multi-point touch.
In one aspect, in some embodiments, the present disclosure provides a touch substrate, including a base, and a touch electrode pattern and a wire pattern that are provided on the base. The touch electrode pattern includes a plurality of strip-shaped electrodes that are provided in parallel on a same layer, and the wire pattern includes a plurality of wires. A first end of each of the strip-shaped electrodes is connected to a wire, and a second end of each of the strip-shaped electrodes is connected to a wire. The first end is provided at an edge of a first side of the touch substrate, and the second end is provided at an edge of a second side opposite to the first side of the touch substrate.
Alternatively, for each of the strip-shaped electrodes, the wire connected to its first end has the same length as the wire connected to its second end.
Alternatively, each of the strip-shaped electrodes is made of indium tin oxide.
Alternatively, the wire pattern is made of metal.
In another aspect, the present disclosure provides a driving device, for driving the above touch substrate. The driving device includes a first driving module. The first driving module is configured to scan each of the strip-shaped electrodes of the touch substrate to determine the strip-shaped electrode corresponding to a touch point, apply alternating voltages to the two wires connected to both ends of the strip-shaped electrode corresponding to the touch point, and determine a position of the touch point on the strip-shaped electrode corresponding to the touch point according to currents on the two wires.
In yet another aspect, the present disclosure provides a driving device, for driving the touch substrate. The driving device includes a second driving module. The second driving module is configured to apply the alternating voltages to the wires connected to both ends of each of the strip-shaped electrodes of the touch substrate and determine a position of a strip-shaped electrode corresponding to a touch point and a position of the touch point on the strip-shaped electrode corresponding to the touch point according to the currents on the wires.
In still another aspect, in some embodiments, the present disclosure provides a driving method for performing touch detection on the touch substrate. The method includes scanning each of the strip-shaped electrodes of the touch substrate to determine the strip-shaped electrode corresponding to the touch point, applying the alternating voltages to the wires connected to both ends of the strip-shaped electrode corresponding to the touch point, and determining a position of the touch point on the strip-shaped electrode corresponding to the touch point according to currents on the two wires.
In still yet another aspect, the present disclosure provides a driving method for performing touch detection on the touch substrate. The method includes applying the alternating voltages to the wires connected to both ends of each of the strip-shaped electrodes of the touch substrate, and determining the position of a strip-shaped electrode corresponding to the touch point and the position of the touch point on the strip-shaped electrode corresponding to the touch point according to the currents on the wires.
In still yet another aspect, the present disclosure provides a method of manufacturing a touch substrate. The method includes forming the touch electrode pattern and the wire pattern on the base, the touch electrode pattern including a plurality of strip-shaped electrodes that are provided in parallel on the same layer, and the wire pattern including a plurality of wires. The first end of each of the strip-shaped electrodes is connected to a wire, and the second end of each of the strip-shaped electrodes is connected to a wire. The first end is provided at an edge of the first side of the touch substrate, and the second end is provided at an edge of the second side opposite to the first side of the touch substrate.
In still yet another aspect, in some embodiments, the present disclosure provides a touch panel, which includes the above touch substrate.
Alternatively, the touch panel further includes protective glass provided on the touch substrate.
Alternatively, the touch panel further includes adhesive glue between the protective glass and the touch substrate.
In still yet another aspect, in some embodiments, the present disclosure provides a display device, which includes the above touch panel.
The present disclosure provides a touch substrate, wherein the plurality of strip-shaped electrodes that are parallel to each other on the same layer is provided on the base, and wires are provided at both ends of the strip-shaped electrodes. When the touch substrate is driven, it only needs to scan the strip-shaped electrodes or detect currents on wires at both ends of the strip-shaped electrodes, in a column direction, so as to determine the strip-shaped electrode corresponding to the touch point, and then the coordinates corresponding to the touch point can be obtained according to the currents and distances between the touch point and both ends of the strip-shaped electrode. Therefore, the scanning times and the driving power consumption can be effectively reduced. Meanwhile, the touch substrate of the present disclosure can support the multi-point touch. In addition, in the touch substrate of the present disclosure, the plurality of strip-shaped electrodes is provided on the same layer, which facilitates reducing the process difficulty.
By reading the following detailed description of the embodiments, various advantages and benefits will be more apparent and clear for a person skilled in the art. The figures are only used to illustrate embodiments, and should not be considered to limit the scope of the present disclosure. In the whole drawings, the same reference signals are used to represent the same component. In the figures,
In order to illustrate the object, the features and the advantages of the present disclosure in a clearer manner, the present disclosure will be described hereinafter in detail in conjunction with the drawings and the embodiments. It should be noted that, in the case of no conflicts, the embodiments and the features in the embodiments of the present disclosure can be mutually combined.
A plurality of details is included in the following descriptions so as to facilitate fully understanding the present disclosure. However, the present disclosure may be implemented in other manners that are different from the manners described herein. Therefore, the scope of the present disclosure is not limited by the following disclosed embodiments.
Unless otherwise defined, any technical or scientific term used herein shall have the common meaning understood by a person of ordinary skills. Such words as “first” and “second” used in the specification and claims are merely used to differentiate different components rather than to represent any order, number or importance. Similarly, such words as “one” or “one of” are merely used to represent the existence of at least one member, rather than to limit the number thereof. Such words as “connect” or “connected to” may include electrical connection, direct or indirect, rather than to be limited to physical or mechanical connection. Such words as “on”, “under”, “left” and “right” are merely used to represent relative position relationship, and when an absolute position of the object is changed, the relative position relationship will be changed too.
As mentioned above, the capacitive touch screen has two structures: the projected capacitive type and a surface capacitive type. The projected capacitive touch screen can be divided into a self capacitive type and a mutual capacitive type. The corresponding ITO patterns mainly include the single-layered ITO shown in
The capacitive touch screen has advantages compared with other touch screens. However, for the projected capacitive touch screen, regardless of being of a single-layered ITO or a double-layered ITO structure, it is needed to scan the x-coordinate and the y-coordinate. As shown in
In view of that, in one aspect, the present disclosure provides a touch substrate. As shown in
According to the touch substrate of the present disclosure, the plurality of strip-shaped electrodes that are parallel to each other on the same layer is provided on the base, and wires are provided at both ends of the strip-shaped electrodes. When the touch substrate is driven, it only needs to scan the strip-shaped electrodes or detect currents on wires at both ends of the strip-shaped electrode, in a column direction (i.e. the y direction in
The touch substrate in
The first driving method may specifically include step S11 and step S12.
Step S11: scanning each of the strip-shaped electrodes in the touch substrate to determine the strip-shaped electrode corresponding to a touch point.
Specifically, as shown in
Step S12: applying alternating voltages to the two wires connected to both ends of the strip-shaped electrode corresponding to the touch point, and determining a position of the touch point on the strip-shaped electrode according to the currents on the two wires.
Specifically, after the strip-shaped electrode corresponding to the touch point 4 is determined, the alternating voltages are applied to two wires 3 connected to the first end 21 and the second end 22 of the strip-shaped electrode 2. For example, two electrodes may be provided to be connected to wires 3 at both ends respectively, and the two electrodes are used to apply the alternating voltages to the wires 3 at both ends. As shown in
By means of the driving method, when the touch substrate is driven, the strip-shaped electrode corresponding to the touch point can be determined to obtain the coordinates of the touch point in the y direction only by scanning the strip-shaped electrodes 2 one by one in the y direction. Then, the coordinates of the touch point in the x direction can be obtained according to the proportion relation. Therefore, there is no need to perform scanning in the x direction, which effectively reduces the scanning times of touch detection, and reduces the driving power consumption.
Although only one touch point is shown in
During specific implementation, the driving method here can be realized by means of the corresponding driving device. Specifically, a driving module can be provided in the corresponding driving device (for facilitating the differentiation, the driving module here is referred to as a first driving module). The first driving module is configured to scan each of the strip-shaped electrodes in the touch substrate to determine the strip-shaped electrode corresponding to the touch point, and apply the alternating voltages to the two wires connected to both ends of the strip-shaped electrode corresponding to the touch point, and determine the position of the touch point on the strip-shaped electrode according to the currents on the two wires.
During specific implementation, the driving device here may refer to a touch driver integrated circuit (Touch Driver IC).
The second driving method may specifically include Step S21 and Step S22.
Step S21: applying the alternating voltages to the wires connected to both ends of each of the strip-shaped electrode in the touch substrate, and determining the strip-shaped electrode corresponding to the touch point according to the currents on the wires.
Specifically, as shown in
Step S22: determining the position of the touch point on the strip-shaped electrode according to the currents on the wire.
Specifically, as shown in
After the coordinate in the x direction and the coordinate in the y direction are determined, they may be sent to the processor (e.g., CPU).
When the second driving method is used to drive the touch substrate shown in
It also can be easily understood that, a multi-point detection can be realized in the second driving method. Specifically, when there is a plurality of touch points, in step S22, the currents on the wires connected to the touch electrodes corresponding to each touch point will be different from the currents when no touches occur. The positions of the touch points on the touch electrode can be determined according to the proportion relation of the currents on the two wires connected to the touch electrodes. The position of each touch point can be determined by the above manner.
The second driving method can be realized with the corresponding driving device. For example, a second driving module is provided in the corresponding driving device. The second driving module is configured to apply the alternating voltages to the wires connected to both ends of each of the strip-shaped electrodes in the touch substrate and determine the position of the strip-shaped electrode corresponding to the touch point and the position of the touch point on the strip-shaped electrode according to the currents on the wires.
During specific implementation, as shown in
As can be seen, when the wires at both ends are set to have an identical length, it is able to easily obtain the coordinates in the x direction for the above two driving methods when determining the position of the touch point, so that the touch detection efficiency can be effectively improved.
During specific implementation, the material of each strip-shaped electrode in the touch electrode pattern on the touch substrate shown in
In another aspect, the present disclosure further provides a method of manufacturing a touch substrate, which can be used to manufacture the touch substrate shown in
According to the method of manufacturing the touch substrate of the present disclosure, only one layer of the touch electrode pattern and the wire pattern are formed on the substrate. Compared with the double-layered ITO structure in the related arts, in the method of the present disclosure, multiple exposures and etchings are not required. Thus, the processing steps and the process costs are reduced. In addition, the touch electrode pattern only includes a plurality of strip-shaped electrodes. Compared with the single-layered ITO structure in the arts, in which a plurality of independent small patterns needs to be formed, in the present disclosure, the process requirements and the process difficulty are reduced, and the productivity are further improved.
In yet another aspect, the present disclosure provides a touch panel. Referring to
In still another aspect, the present disclosure provides a display device, which includes the above touch panel. The process difficulty for manufacturing the display device is relatively low. The display device has relatively low driving power consumption when detecting the touch point, and can support the multi-point touch. Therefore, it has a relatively wide application range.
During specific implementation, the display device here may be a product or a component that has a display function such as an e-book, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
The above are merely the preferred embodiments of the present disclosure and shall not be used to limit the scope of the present disclosure. It should be noted that, a person skilled in the art may make improvements and modifications without departing from the principle of the present disclosure, and these improvements and modifications shall also fall within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201610096547.5 | Feb 2016 | CN | national |
