Patent Application
20180314369
The present invention relates to a device for touch panel, the device including antenna patterns for short-range wireless communication in a region where an image or the like is to be displayed (display area).
In recent years, the following technique is often used: between an IC card (contactless IC card) that does not include a power source and incorporates an antenna element for wireless communication, and a communication device that includes a power source, short-range communication is performed between the IC card and the communication device without the two being brought into contact with each other. For example, in a case where wireless communication (short-range communication) is performed between a communication device and a contactless IC card, the contactless IC card is brought close to the communication device, to such an extent that the distance between the antenna element of the communication device and the contactless IC card is equal to or less than a predetermined distance. The communication device includes a power source, and power is supplied to the antenna element for short-range wireless communication incorporated in the communication device, whereby a magnetic field is generated by the antenna element. Then, by the magnetic field generated by the communication device when the contactless IC card is brought close to the communication device, induced current is caused to flow through the antenna element of the contactless IC card. Thus, electric power can be supplied from the communication device to the contactless IC card. Then, the contactiess IC card causes a circuit (for example, an IC chip) in the contactless IC card to operate, with use of the electromotive force generated by the induced current. In this way, by bringing a contactless IC card close to a communication device, wireless communication (short-range communication) can be performed between the contactless IC card and the communication device.
Commonly, an antenna element is often made of a metal having a high conductivity (copper or silver) in order to ensure conductivity. Such a metal does not transmit light, and therefore, if the antenna element is formed in the display section of a display device that displays an image or a video image, light that forms an image or a video image is blocked by the antenna element.
To solve such a problem, Patent Document 1, for example, discloses a technique of forming mesh-type antenna patterns on a transparent substrate so as to ensure both of the conductivity for realizing the antenna function and the transparency.
Patent Document 1: JP-A-2011-066610
For example, in a case where an antenna is mounted on a touch-panel-equipped display device with use of the above-described technique, the touch-panel-equipped display device may have a configuration that includes a first electrode layer in which X-axis-direction sense electrodes for touch panel are formed, a second electrode layer in which Y-axis-direction sense electrodes for touch panel (Y-axis-direction sense electrodes that are arranged so as to intersect with the X-axis-direction sense electrodes when viewed in a plan view) are formed, and a conductive layer for antenna pattern in which antenna patterns are formed.
The upper view in
As illustrated in
The first electrode layer (X-axis-direction electrode layer) L_X includes eight conductive patterns Ex1 to Ex8 formed on a substrate made of an insulation material (for example, PET (polyethylene terephthalate)), as illustrated in
The second electrode layer (Y-axis-direction electrode layer) L_Y includes fourteen conductive patterns Ey1 to Ey14 formed on a substrate made of an insulation material (for example, PET (polyethylene terephthalate)), as illustrated in
The conductive layer L_Ant for antenna pattern includes an antenna pattern Ant formed on a substrate made of an insulation material (for example, PET (polyethylene terephthalate)), as illustrated in
In a case where the touch-panel-equipped display device 900 is formed by using the prior art in this way, there are the following problems. As illustrated in 18, when the antenna Ant is driven, a magnetic field that is generated due to an inductance L in the conductive layer L_Ant for antenna pattern causes eddy current to be generated in a coil Lx in the first electrode layer (X-axis-direction electrode layer) L_X, a coil Ly in the second electrode layer (Y-axis-direction electrode layer) L_Y, and a coil Ldp in the display panel DP. This causes antenna properties to deteriorate, and further causes the amount of consumption of electric power for antenna driving to increase. Still further, in a case where the touch-panel-equipped display device 900 is formed by using the prior art, it is necessary to provide a conductive layer for forming an antenna pattern Ant additionally, which causes the manufacturing cost to rise.
In light of the above-described problems, it is an object of the present invention to realize a device for touch panel characterized in that the deterioration of the performance of an antenna due to eddy current generated between the antenna and a touch sensor (electrodes for touch panel) can be prevented, and that the manufacturing cost can be reduced.
To achieve the above-described object, a first configuration is a device for touch panel that includes a first electrode layer and a second electrode layer.
The first electrode layer includes a first sensor electrode pattern for ouch panel and an antenna pattern.
The second electrode layer includes a second sensor electrode pattern for touch panel that is arranged so as to intersect with the first sensor electrode pattern when viewed in a plan view.
The present invention makes it possible to realize a device for touch panel characterized in that the deterioration of the performance of an antenna due to eddy current generated between the antenna and a touch sensor (electrodes for touch panel) can be prevented, and that the manufacturing cost can be reduced.
The following description describes Embodiment 1 while referring to the drawings.
The touch-panel-equipped display device 100 includes a case 1, a circuit part 2, a display panel DP, a coexisting conductive layer L_Y_Ant (a conductive layer in which antenna patterns and Y-axis-direction electrodes coexist), an X-axis-direction, electrode layer X, and a cover 3, as illustrated in
As illustrated in
Further, as illustrated in
The circuit part 2 includes a circuit board, and various types of circuits are formed on the circuit board. The circuit part 2 includes, for example, a matching unit 21 and an antenna driving unit 22, as illustrated in
The touch panel controller TC1 sequentially outputs a drive actuating signal o the X-axis-direction electrodes Ex1 to Ex8 formed in the X-axis-direction electrode layer L_X illustrated in
Further, the circuit part 2 includes, for example, a display panel control unit (not shown) for controlling the display panel DP.
The matching unit 21 includes a circuit that performs impedance adjustment (an impedance adjustment circuit) and the like. The impedance adjustment circuit of the matching unit 21 is connected with antenna patterns Ant_p1, Ant_p2 formed in the coexisting conductive layer L_Y_Ant through terminals pa2, pa4 for connection (terminals pa2, pa4 for connection, illustrated in
The antenna driving unit 22 is connected with the matching unit 21, as illustrated in
The display panel DP is, for example, a display panel in which liquid crystal, organic EL, or the like is used (a liquid crystal display panel or an organic EL display panel). The display panel DP is connected to a display panel control unit (not shown), so that the display panel DP is driven and controlled by the display panel control unit. With the driving of the display panel DP controlled by the display panel control unit, an image of the like, for example, is displayed on the display panel DP.
As illustrated in
The coexisting conductive layer L_Y_Ant (the coexisting conductive layer in which antenna patterns and the Y-axis-direction electrodes coexist) includes the antenna patterns Ant_p1, Ant_p2, and the Y-axis-direction electrode patterns Ey1 to Ey41, Ey21 to Ey42, Ey5 to Ey14, formed on a substrate made of an insulation material (for example, PET (polyethylene terephthalate)), as illustrated in
Here, in blank areas (areas where the Y direction electrodes are not formed) in the area AR1 illustrated in in
Further, the dummy patterns are in an electrically floating state, or alternatively, are electrically connected so as to have a certain set potential (for example, a GND potential). The dummy patterns are in a state in which a voltage is applied to the same. The dummy patterns, however, are preferably connected to GND.
This is intended to make approximately equal the intersection capacitances between the X-axis-direction electrodes and the Y-axis-direction electrodes in areas where the antenna patterns (antenna electrodes) are present and such intersection capacitances in the areas where no antenna pattern are present. Consequently, the touch panel performance is improved.
to make equal the intersection capacitances between the Y-axis-direction electrode patterns and the X-axis-direction electrode patterns in the areas where the antenna patterns are present and such intersection capacitances in the areas where the antenna patterns are not present. Consequently, the performance of the touch panel can be improved.
Further, by connecting the dummy patterns to the GND potential, the values of coupling capacitances between the antenna patterns (antenna electrodes) and the Y-axis-direction electrodes for touch panel can be reduced, whereby antenna noise that is propagated from the antenna patterns (antenna electrodes) to the Y-axis-direction electrodes can be suppressed. This makes it possible to improve the performance of the touch panel.
In the case of the above-described configuration, the width of the dummy pattern (the width of the pattern connected to the GND potential) is desirably 300 μm or more.
The antenna patterns Ant_p1, Ant_p2 are, for example, transparent conductive patterns (transparent electrodes) made of ITO or the like. Alternatively, the antenna patterns Ant_p1, Ant_p2 may be formed with mesh patterns of thin metal lines (for example, copper lines). Forming the antenna patterns Ant_p1, Ant_p2 in this way makes it possible to ensure that light should not be blocked by the antenna patterns Ant_p1, Ant_p2 (to ensure certain light transmissivity).
The Y-axis-direction electrode patterns Ey1 to Ey41, Ey21 to Ey42, Ey5 to Ey14 are, for example, transparent conductive patterns (transparent electrodes) made of ITO or the like. Alternatively, the Y-axis-direction electrode patterns Ey1 to Ey41, Ey21 to Ey42, Ey5 to Ey14 may be formed with mesh patterns of thin metal lines (for example, copper lines). Forming the Y-axis-direction electrode patterns Ey1 to Ey41, Ey21 to Ey42, Ey5 to Ey14 in this way makes it possible to ensure that light should not be blocked by the Y-axis-direction electrode patterns Ey1 to Ey41, Ey21 to Ey42, Ey5 to Ey14 (to ensure certain light transmissivity).
As illustrated in.
As illustrated in
As illustrated in
As illustrated in
As illustrated in.
The antenna pattern Ant_p2 has an angular U-shape in a plan view, as illustrated in
The antenna pattern Ant_p1 has an angular U-shape in a plan view, as illustrated in
As illustrated in
As illustrated in
A GND electrode pattern may be provided so as to be along the antenna patterns Ant_p1, Ant_p1.
As illustrated in
Further, as illustrated in
Still further, as illustrated in
Still further, as illustrated in
The configuration may be as follows: in the above-described dummy area, for example, a mesh pattern of thin metal lines is formed, and by connecting the mesh pattern in the above-described dummy area to a GND potential, the dummy area is connected to a GND potential.
Further, the above-described dummy area may be in a floating state (a state of being connected to no potential).
The connection method and the connection positions for the GND electrode patterns Gnd1 to Gnd4, however, are not limited to those illustrated in
Further, as illustrated in
Still further, the configuration may be such that dummy areas around the Y-axis-direction electrode patterns Ey11, Ey21, Ey31, Ey41 are connected by one line. The dummy areas may have a GND potential thereby.
Still further, the configuration may be such that connection to dummy areas around the Y-axis-direction electrode patterns Ey5 to Ey14 are achieved from the terminal edge side of the touch panel TP (the side where the circuit part 2 is arranged), and from the side opposite to the foregoing side. This makes it possible to reduce the number of terminals.
Still further, it is preferable that the Y-axis-direction electrode patterns in areas where the antenna patterns are not arranged are formed thinner and narrower. This is intended to make approximately equal the intersection capacitances between the Y-axis-direction electrode patterns and the X-axis-direction electrode patterns in the areas where the antenna patterns are present and such intersection capacitances in the areas where no antenna patterns are present. Consequently, the performance of the touch panel can be improved.
Particularly, as indicated in Japanese Patent No. 4955116, in a case where the reading method of the touch panel controller is the differential reading method, when the Y-axis-direction electrode patterns are assumed to be sense electrodes (reception electrodes), intersection capacitances between the X-axis-direction electrode patterns and the Y-axis-direction electrode patterns are significantly different between the areas where the antenna patterns are present and the areas where no antenna patterns are present. This causes an amplified output to be saturated (when, for example, a difference between electric fields generated in the Y-axis-direction electrode patterns Ey41, Ey42 and the Y-axis-direction electrode pattern Ey5 (or voltages corresponding to the same) is determined), thereby causing the sensitivity of the touch panel to significantly deteriorate.
To prevent such a problem, it is preferable to make the Y-axis-direction electrode patterns thinner and narrower, to reduce a difference between the intersection capacitances.
As illustrated in
The X-axis-direction electrode layer L_X includes the X-axis-direction electrode patterns Ex1 to Ex8 formed on a substrate made of an insulation material (for example, PET (polyethylene terephthalate)), as illustrated in
The X-axis-direction electrode patterns Ex1 to Ex8 are, for example, transparent conductive patterns (transparent electrodes) made of ITO or the like. Alternatively, the X-axis-direction electrode patterns Ex1 to Ex8 may be formed with mesh patterns of thin metal lines (for example, copper lines). Forming the X-axis-direction electrode patterns Ex1 to Ex8 in this way makes it possible to ensure that light should not be blocked by the X-axis-direction electrode patterns Ex1 to Ex8 (to ensure certain light transmissivity).
Each of the X-axis-direction electrode patterns Ex1 to Ex8, as illustrated in
The cover 3 is made of a transparent insulation material. The cover 3 is ins ailed on the case 1 as illustrated in
As is dear from
Further, in the touch-panel-equipped display device 100, both of the antenna patterns and the Y-axis-direction electrode patterns for touch panel are formed in the coexisting conductive layer L_Y_Ant, which makes it unnecessary to additionally provide a layer in which antenna patterns are to be formed as in the case where the prior art is applied. Therefore, it is possible to reduce the manufacturing cost.
The following description describes Modification Example 1 of the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and detailed descriptions of the same are omitted.
In the touch-panel-equipped display device of Modification Example 1, as illustrated in
In the touch-panel-equipped display device of Modification Example 1, as illustrated in
With this configuration, areas that the antenna patterns Ant_p1, Ant_p2 occupy in the area AR1 (display surface AR1) can be reduced in the touch-panel-equipped display device of Modification Example 1. As a result, in the touch-panel-equipped display device of Modification Example 1, eddy current generated in another layer (the X-axis-direction electrode layer or the display panel DP) by an inductance component (the coil L in the equivalent circuit) in the coexisting electrode layer L_Y_Ant can be reduced. In the touch-panel-equipped display device of Modification Example 1 therefore, the deterioration of performance of the antenna caused by eddy current generated between the antenna and the touch sensor (electrodes for touch panel) can be further appropriately prevented.
Besides, using the frame area makes it possible to arrange non-transparent electrodes in the frame area, whereby resistance can be reduced. As a result, the communication performance of the antenna can be improved.
The following description describes Modification Example 2 of the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and detailed descriptions of the same are omitted.
The touch-panel-equipped display device of Modification Example 2, as illustrated in
The Y-axis-direction electrode patterns Ey51 and Ey52 are electrically connected to each other by a conducting line as is the case with Embodiment 1, and further, the same are connected to a terminal through which the touch panel controller TC1 outputs a signal for driving the Y-axis-direction electrode patterns Ey51 and Ey52 (a terminal of the touch panel controller TC1).
The Y-axis-direction electrode patterns Ey61 and Ey62 have a configuration identical to that described above, and so do the Y-axis-direction electrode patterns Ey71 and Ey72.
In the touch-panel-equipped display device of Modification Example 2, as illustrated in
Further, in the touch-panel-equipped display device of Modification Example 2, eight antenna patterns extending in the X axis direction are formed in a frame area that is an area outside the area AR1 (the display surface AR1), as illustrated in
In the touch-panel-equipped display device of Modification Example 2, the antenna patterns Ant_p1, Ant_p2, Ant_p3, Ant_p4 are connected by conducting lines as illustrated in
Further, in the touch-panel-equipped display device of Modification Example 2, the terminals pa1, pa2 illustrated in
In this way, in the touch-panel-equipped display device of Modification Example 2, a quadruple helical antenna pattern (four-turn helical antenna pattern) can be formed in the coexisting electrode layer L_Y_Ant.
The following description describes Modification Example 3 of the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and detailed descriptions of the same are omitted.
The touch-panel-equipped display device of Modification Example 3, as illustrated in
The Y-axis-direction electrode patterns Ey61 and Ey62 are electrically connected to each other by a conducting line as is the case with Embodiment 1, and further, the same are connected to a terminal through which the touch panel controller TC1 outputs a signal for driving the Y-axis-direction electrode patterns Ey61 and Ey62 (a terminal of the touch panel controller TC1).
The Y-axis-direction electrode patterns Ey71 and Ey72 have a configuration similar to that described above, and so do the Y-axis-direction electrode patterns Ey81 and Ey82, Ey91 and Ey92, Ey111 and Ey112, Ey121 and Ey122, Ey131 and Ey132, as well as Ey141 and Ey142.
In the touch-panel-equipped display device of Modification Example 3, further, as illustrated in
More specifically, in the touch-panel-equipped display device of Modification Example 3, the antenna pattern Ant_p12 is arranged so as to surround the Y-axis-direction electrode patterns Ey12 to Ey42, and the antenna pattern Ant_p11 is arranged so as to surround the Y-axis-direction electrode patterns Ey12 to Ey42 and the antenna pattern Ant_p12.
In the touch-panel-equipped display device of Modification Example 3 further, the antenna patterns Ant_p11, Ant_p12 are connected by a conducting line as illustrated in
Further, in the touch-panel-equipped display device of Modification Example 3, the antenna pattern Ant_p22 is arranged so as to surround the Y-axis-direction electrode patterns Ey62 to Ey92, and the antenna pattern Ant_p21 is arranged so as to surround the Y-axis-direction electrode patterns Ey62 to Ey92 and the antenna pattern Ant_p22.
In the touch-panel-equipped display device of Modification Example 3, further, the antenna patterns Ant_p21, Ant_p22 are connected by a conducting line as illustrated in
Further, in the touch-panel-equipped display device of Modification Example 3, the antenna pattern Ant_p32 is arranged so as to surround the Y-axis-direction electrode patterns Ey112 to Ey142, and the antenna pattern Ant_p31 is arranged so as to surround the Y-axis-direction electrode patterns Ey112 to Ey142 and the antenna pattern Ant_p32.
In the touch-panel-equipped display device of Modification Example 3, the antenna patterns Ant_p31, Ant_p32 are connected by a conducting line as illustrated in
In the touch-panel-equipped display device of Modification Example 3, further, the antenna patterns Ant_p41, Ant_p42, the antenna patterns Ant Ant_p52, and, the antenna patterns Ant_p61, Ant_p62 are configured in the same manner as described above, whereby double helical antenna patterns (two-turn helical antenna patterns) are formed.
In this way, in the touch-panel-equipped display device of Modification Example 3, as illustrated in
The following description describes Modification Example 4 of the present embodiment.
The same parts as those described above are denoted by the same reference numerals, and detailed descriptions of the same are omitted.
The left diagram in
In the touch-panel-equipped display device of Modification Example 4, terminals are connected by conductive patterns indicated by cross-hatching in the left diagram in
Alternatively, in the touch-panel-equipped display device of Modification Example 4, the shape of the antenna may be changed by changing the connection of terminals T1 to T8 for connection with the antenna pattern illustrated in
(1) In a case where an antenna of a quadruple helical structure is to be formed in the touch-panel-equipped display device of Modification Example 4, the terminal T1 and the terminal T7 are connected to each other, the terminal T2 and the terminal T6 are connected to each other, the terminal T3 and the terminal T6 are connected to each other, and further, the terminals T4, T8 are connected to the matching unit 21, as illustrated in
(2) In a case where an antenna of a double helical structure is to be formed in the touch-panel-equipped display device of Modification Example 4, the terminal T1 and the terminal T7 are connected to each other, and the terminals T2, T8 are connected to the matching unit 21, as illustrated in
(3) In a case where an antenna of a low-resistance double helical structure is to be formed in the touch-panel-equipped display device of Modification Example 4, the terminals T1, T2, T5, T6 are connected, the terminals T3 and T4 are connected to each other, the terminals T7 and T8 are connected to each other, and further, the terminals T4, T8 are connected to the matching unit 21, as illustrated in
As described above, in the touch-panel-equipped display device of Modification Example 4, a variety of antenna patterns can be realized by changing the connection of terminals of the flexible printed substrate FPC1.
In the touch-panel-equipped display device, properties (resonance frequency, etc.) of an antenna are sometimes caused to shift by the electrode structure of the display itself, mutual interactions between the display and the display housing (addition of electric capacitance, generation of mutual inductance, etc.), depending on the type of the display panel DP mounted thereon, individual difference, etc. Further, in a case where antennas are provided at a plurality of locations, the properties (resonance frequency, etc.) of antennas vary with the locations in some cases. To cope with this, the touch-panel-equipped display device has a structure with which the own performance of the antenna can be varied as described above, whereby the antenna performance can be adjusted as required.
The following description describes Modification Example 5 of the present embodiment.
In the touch-panel-equipped display device of the present modification example, as illustrated in
In the touch-panel-equipped display device of the present modification example, as illustrated in
In the touch-panel-equipped display device of the present modification example, the antenna patterns having a configuration as described above are connected with the matching unit 21, as illustrated in the right diagram of
In this way, in the touch-panel-equipped display device of the present modification example, as illustrated in
Besides, in the touch-panel-equipped display device of the present modification example, the antenna pattern Ant_ptn_x in the X-axis-direction electrode layer L_X and the antenna pattern Ant_ptn_y in the coexisting conductive layer L_Y_Ant are formed at such positions that the same overlap with each other when viewed in a plan view, as illustrated in
The following description describes Modification Example 6 of the preset embodiment.
In the touch-panel-equipped display device of the present modification example, as illustrated in
In the touch-panel-equipped display device of the present modification example, as illustrated in
Besides, in the touch-panel-equipped display device of the present modification example, as illustrated in
In the touch-panel-equipped display device of the present modification example, the antenna pattern having a configuration as described above is connected with the matching unit 21, as illustrated in the right diagram of
In this way, in the touch-panel-equipped display device of the present modification example, as illustrated in
Besides, in the touch-panel-equipped display device of the present modification example, the antenna pattern Ant_ptn_x in the X-axis-direction electrode layer L_X, the antenna pattern Ant_ptn_y in the coexisting conductive layer L_Y_Ant, and the antenna pattern Ant_ptn_ant in the antenna layer L_Ant are formed at such positions that these overlap with one another when viewed in a plan view, as illustrated in
The touch-panel-equipped display devices of the above-described embodiments (including the modification examples) are described with reference to examples in which a layer in which antenna patterns and Y-axis-direction electrode patterns for touch panel coexist is provided, but the configuration is not limited to this. Alternatively, the configuration may be such that a layer in which antenna patterns and an X-axis-direction electrode pattern for touch panel coexist is provided.
Alternatively, antenna patterns may be formed in both of the layer in which the X-axis-direction electrode patterns for touch panel are formed, and the layer in which the Y-axis-direction electrode patterns for touch panel are formed.
Further alternatively, a touch-panel-equipped display device may be realized by combining a part or all of the above-described embodiments (including the modification examples).
Further, in the foregoing description, only principal and essential members are indicated in a simplified manner, among the constituent members required for the above-described embodiments. The configurations of the above-described embodiments may include arbitrary constituent members that are not clearly indicated in the foregoing description of the embodiments. Besides, in the embodiments and the drawings, the size and dimension ratio, etc., of each member do not necessarily represent an actual size, an actual dimension ratio, and the like faithfully. The size, the dimension ratio, and the like, therefore, can be varied without departing from the spirit and scope of the present invention.
The specific configuration of the present invention is not limited to those of the above-described embodiments, and it can be changed or corrected variously without departing from the spirit and scope of the invention.
The present invention can be also described as follows.
The first invention is a device for touch panel that includes electrode layer and a second electrode layer.
The first electrode layer includes a first sensor electrode pattern for touch panel and a first antenna pattern.
The second electrode layer includes a second sensor electrode pattern for touch panel that is arranged so as to intersect with the first sensor electrode pattern when viewed in a plan view.
In this device for touch panel, the first sensor electrode pattern for touch panel and the first antenna pattern are provided in the first electrode layer. This makes it possible to suppress eddy current generated between an antenna and a touch sensor (electrodes for touch panel), as compared with a case where the prior art is applied. As a result, in this device for touch panel, the deterioration of the performance of the antenna due to eddy current generated between the antenna and the touch sensor (electrodes for touch panel) can be prevented, as compared with a case where the prior art is applied.
Further, in the device for touch panel, since the first sensor electrode pattern for touch panel and the first antenna pattern are provided, it is unnecessary to additionally provide a layer in which the first sensor electrode pattern is to be formed. Therefore, it is possible to reduce the manufacturing cost.
The second invention is the first invention further characterized in that the first sensor electrode pattern includes N first direction electrode patterns (N: natural number). Each of K first direction electrode patterns (K: natural number, K<N), of the N first direction electrode patterns, includes a first conductive pattern and a second conductive pattern that is arranged separately from the first conductive pattern.
Herewith, in this device for touch panel, an area for arranging a conductive pattern other than the first direction electrode pattern can be ensured in the first electrode layer.
The third invention is the second invention further characterized in that at least a part of the first antenna pattern is arranged in an area between the first conductive pattern and the second conductive pattern.
Herewith, in this device for touch panel, at least a part of the first antenna pattern can be arranged in an area between the first conductive pattern and a second conductive pattern in the first electrode layer.
The fourth invention is any one of the first to third inventions further characterized in that a part of the first antenna pattern is arranged in an area other than a touch panel area in which the first sensor electrode pattern and the second sensor electrode pattern are arranged when viewed in a plan view.
Herewith, in this device for touch panel, the first antenna pattern can be formed an area other than the touch panel area (for example, a frame area).
The fifth invention is any one of the first to fourth inventions further characterized in that the first antenna pattern is arranged so as to form a helical antenna when viewed in a plan view.
Herewith, in this device for touch panel, a helical antenna can be formed.
The sixth invention is the fifth invention further characterized in that the first antenna pattern is arranged so as to form a helical antenna of a plurality of turns when viewed in a plan view.
Herewith, in this device for panel, a helical antenna of a plurality of turns can be farmed.
The seventh invention is any one of the first to sixth inventions further including an electrode lead-out part that includes terminals for connecting the first sensor electrode pattern for touch panel and the first antenna pattern, wherein the shape of the antenna formed with the fiat antenna pattern is changed by changing line layout between the terminals of the electrode lead-out part.
Herewith, in this device for touch panel, a variety of antenna patterns can be formed, whereby antennas with a variety of antenna properties can be realized.
The eight invention is the seventh invention further characterized in that the electrode lead-out part is formed with a flexible printed substrate.
Herewith, in this device for touch panel, an electrode lead-out part can be realized by using a flexible printed substrate.
The ninth invention is any one of the first to eighth inventions further including an GND area that is provided in the same layer as the layer where the first antenna pattern is formed, so that the GND area is arranged along at least a part of the first antenna pattern when viewed in a plan view.
Herewith, in this device for touch panel, influences of an electromagnet field, disturbance noise, etc. excreted to the first antenna pattern can be suppressed, whereby the antenna performance can be improved.
The configuration may be such that, in an area for the “GND area”, for example, a mesh pattern made of thin metal lines is formed and the mesh pattern is connected to a GND potential so that a “GND area” is realized.
The tenth invention is any one of the first to eighth inventions further including GND areas that are provided in the same layer as the layer where the first antenna pattern is formed, so that at least a part of the first antenna pattern is interposed between the GND areas when viewed in a plan view.
Herewith, in this device for touch panel, influences of an electromagnetic field, disturbance noise, etc. exerted to the first antenna pattern can be suppressed, whereby the antenna performance can be improved.
The configuration may be such t in an area for the “GND area”, for example, a mesh pattern made of thin metal lines is formed and the mesh pattern is connected to a GND potential so that a “GND area” is realized.
The eleventh invention is any one of the first to tenth inventions further including a dummy pattern provided in an area in which none of the electrode pattern and the first antenna pattern is formed, in at least one of the first electrode layer and second electrode layer.
Herewith, in this device for touch panel, influences of an electromagnetic field, disturbance noise, etc. exerted to the first antenna pattern can be suppressed, whereby the antenna performance can be improved. Further, in this device for touch panel, the transmittance is made uniform in the entire surface (the entire display surface) by providing a dummy pattern, and the electrode patterns for touch panel and the electrode patterns for antenna are appropriately prevented from being visit le when a user looks at the display surface.
The twelfth invention is the eleventh invention further characterized in that the dummy pattern is connected to x GND potential.
The thirteenth invention is the second invention further characterized in that, among the first sensor electrode patterns, the first sensor electrode pattern that includes neither the first conductive pattern nor the second conductive pattern is formed so that the width of the first sensor electrode pattern in an overlap area that is an area overlapping the second sensor electrode pattern arranged in a spacing area that is an area between the first conductive pattern and the second conductive pattern is smaller than a width of the first sensor electrode pattern in an area other than the overlap area, when viewed in a plan view.
Herewith, in this device for touch panel, it is possible to appropriately prevent differences in the intersection capacitances between the X-axis-direction electrode patterns and the Y-axis-direction electrode patterns for touch panel from increasing.
The fourteenth invention is any one of the first to thirteenth inventions further characterized in that the second electrode layer includes'second antenna pattern.
Herewith, he antenna pattern can be included n the second electrode layer.
The fifteenth invention is the fourteenth invention further characterized in that the second antenna pattern is provided so as to at least partially overlap the first antenna pattern when viewed in a plan view.
Herewith, in this device for touch panel, a part of the touch panel electrode (electrode pattern for touch panel) that covers the antenna electrode (antenna pattern) can be decreased. In this device for touch panel, therefore, an inductance component generated when a touch panel electrode (electrode pattern for touch panel) overlaps an antenna electrode (antenna pattern) can be reduced. As a result, in the device for touch panel, the communication performance of the antenna can be improved.
The sixteenth invention is any one of the first to fifteenth inventions further including an antenna layer that includes a third antenna pattern.
The seventeenth invention is the sixteenth invention further characterized in that the third antenna pattern is provided so as to At least partially overlap the first antenna pattern when viewed in a plan view.
Herewith, in this device for touch panel, a part of the touch panel electrode (electrode pattern for touch panel) that covers the antenna electrode (antenna pattern) can be decreased. In this device for touch panel, therefore, an inductance component generated when a touch panel electrode (electrode pattern for touch panel) overlaps an antenna electrode (antenna pattern) can be reduced. As a result, in the device for touch panel, the communication performance of the antenna can be improved. Besides, by connecting the first antenna pattern and the third antenna pattern in parallel, the resistance can be reduced.
The eighteenth invention is the fourteenth or fifteenth invention further including an antenna layer that includes a third antenna pattern.
The third antenna pattern is provided so as to at least partially overlap the first antenna pattern and the second antenna pattern when viewed in a plan view.
Herewith, in this device for touch pan a part of the touch panel electrode (electrode pattern for touch panel) that covers the antenna electrode (antenna pattern) can be decreased. In this device for touch panel, therefore, an inductance component generated when a touch panel electrode (electrode pattern for touch panel) overlaps an antenna electrode (antenna pattern) can be reduced. As a result, in the device for touch panel, the communication performance of the antenna can be improved. Further, by connecting the first antenna pattern, the second antenna pattern, and the third antenna pattern in parallel, the resistance can be reduced.
The present invention makes it possible to realize, a device for touch panel characterized in that the deterioration, of the performance of an antenna caused by eddy current generated between the antenna and a touch sensor (electrode for touch panel) can be prevented, and the manufacturing cost can be reduced. The present invention, therefore, is useful in the field of touch panel-related industry, and can be implemented in this field.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2015-207146 | Oct 2015 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2016/080825 | 10/18/2016 | WO | 00 |
