Touch panel built-in display device

Abstract

The present invention provides a touch panel-integrated display device that reduces the load on the drive electrodes and detection electrodes, thereby enabling a larger touch panel-integrated display device. [Solution] The display device (touch panel 1) comprises a pixel electrode, a counter electrode 12c, a plurality of drive electrodes 12a, and a plurality of detection electrodes 12b. The counter electrode 12c, the plurality of drive electrodes 12a, and the plurality of detection electrodes 12b are formed in the same layer. The plurality of detection electrodes 12b form capacitance with the plurality of drive electrodes 12a. The counter electrode 12c includes a first portion 12ca disposed between the plurality of drive electrodes 12a and a second portion 12cb disposed between the plurality of detection electrodes 12b.

Description

Technical Field

[0001] The present disclosure relates to a display device with a built-in touch panel.

Background Art

[0002] The touch panel built-in display device of Patent Document 1 includes a plurality of drive electrodes, a plurality of detection electrodes, a plurality of pixel electrode groups, and a touch detection driver. In the first period, the touch detection driver does not supply a touch detection drive signal to the first drive electrode that overlaps in plan view with the first pixel electrode group to which the gate signal is supplied, but supplies the touch detection drive signal to the second drive electrode that is arranged to overlap in plan view with the second pixel electrode group to which the gate signal is not supplied. Further, in the first period, the first drive electrode functions as an electrode for display (a counter electrode (common electrode) facing the plurality of pixel electrodes).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the touch panel built-in display device described in Patent Document 1 above, when trying to increase the size of the touch panel built-in display device, the size per drive electrode and the size per detection electrode increase. As a result, the load (capacitance and resistance) of the plurality of drive electrodes and the load of the plurality of detection electrodes increase. Due to this large load, it may become difficult to supply a drive signal to the drive electrode. That is, when trying to increase the size of the touch panel built-in display device, the waveform of the drive signal may collapse, and there is a possibility that accurate touch detection cannot be performed.

[0005] Therefore, this disclosure has been made to solve the above-mentioned problems, and aims to provide a touch panel-integrated display device that can be enlarged by reducing the load on the drive electrode and the detection electrode. [Means for solving the problem]

[0006] To solve the above problems, a touch panel-integrated display device according to one aspect of the present disclosure includes: a pixel electrode; a counter electrode disposed opposite to the pixel electrode, the counter electrode being formed in a first layer; a plurality of drive electrodes formed in the first layer; and a plurality of detection electrodes formed in the first layer, the detection electrodes being formed in the first layer and forming capacitance with the drive electrodes. The counter electrode includes a first portion disposed between the plurality of drive electrodes and a second portion disposed between the plurality of detection electrodes. [Effects of the Invention]

[0007] With the above configuration, the load on the drive electrodes and the load on the detection electrodes are reduced, which allows for a larger touch panel-integrated display device. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a block diagram showing the functional configuration of the display device 100 according to the first embodiment. [Figure 2] Figure 2 is a cross-sectional view of the touch panel 1. [Figure 3] Figure 3 is a cross-sectional view of the touch panel 1. [Figure 4] Figure 4 is a schematic plan view illustrating the connection between the gate driver 51 and the source driver 52 and the thin-film transistor 60. [Figure 5] Figure 5 is a schematic circuit diagram illustrating the connection between the thin-film transistor 60 and the gate line 15 and source line 18. [Figure 6] Figure 6 is a schematic plan view illustrating the arrangement of the drive electrode 12a and the gate wire 15. [Figure 7] Figure 7 is a diagram illustrating the configuration of the gate wire group 15a. [Figure 8] Figure 8 is a plan view illustrating the arrangement of the drive electrode 12a, the detection electrode 12b, and the counter electrode 12c. [Figure 9] Figure 9 is a diagram illustrating the unit cell 70. [Figure 10] Figure 10 is a timing chart illustrating the timing for transmitting the gate signal and drive signal dm according to the first embodiment. [Figure 11] Figure 11 shows the configuration of the touch panel 201 of the display device 200 according to the second embodiment. [Figure 12] Figure 12 shows the configuration of the drive electrode 212a according to the second embodiment. [Figure 13] Figure 13 is a cross-sectional view showing the configuration of touch panel 201C according to a comparative example. [Figure 14] Figure 14 is a cross-sectional view showing the configuration of the touch panel 201 according to the second embodiment. [Figure 15] Figure 15 is a plan view showing the configuration of the touch panel 301 according to the first modified example of the second embodiment. [Figure 16] Figure 16 is a plan view showing the configuration of the touch panel 401 according to a second modification of the second embodiment. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described in detail below with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and their descriptions will not be repeated. For the sake of clarity, the drawings referenced below may show simplified or schematic representations of the configuration, or some components may be omitted. Furthermore, the dimensional ratios between components shown in each drawing do not necessarily represent the actual dimensional ratios.

[0010] [First Embodiment] The configuration of the display device 100 with a built-in touch panel (hereinafter referred to as "display device 100") according to the first embodiment will be described. FIG. 1 is a block diagram showing the functional configuration of the display device 100 according to the first embodiment.

[0011] As shown in FIG. 1, the display device 100 includes a touch panel 1 and a controller 2. The touch panel 1 is, for example, a full in-cell type touch panel. The touch panel 1 functions as a display panel for displaying video or images. The controller 2 executes each control process in the display device 100 based on the touch detection information (for example, touch position) acquired from the touch panel 1.

[0012] Also, FIGS. 2 and 3 are cross-sectional views of the touch panel 1. As shown in FIG. 2, the touch panel 1 has an active matrix substrate 10, a counter substrate 20, and a liquid crystal layer 30 disposed between the active matrix substrate 10 and the counter substrate 20. Also, a pair of polarizing plates 40a and 40b are provided so as to sandwich the active matrix substrate 10 and the counter substrate 20. A color filter (not shown) is disposed on the counter substrate 20. Although not shown, a protective glass or the like is provided on the surface of the polarizing plate 40a. The outermost layer such as this protective glass forms the touch surface (the surface touched by the indicator). For example, the user visually recognizes an image from the surface side of the polarizing plate 40a. Also, the touch panel 1 receives a touch operation by, for example, a finger or the like (indicator) on the touch surface.

[0013] In the touch panel 1, the driving method of the liquid crystal molecules contained in the liquid crystal layer 30 is the horizontal electric field driving method. To realize the horizontal electric field driving method, as shown in FIG. 2, pixel electrodes 11 and electrodes 12 for forming an electric field are formed on the active matrix substrate 10. Note that the "electrode 12" is any one of the drive electrode 12a, the detection electrode 12b, and the counter electrode 12c. When the drive electrode 12a, the detection electrode 12b, and the counter electrode 12c are not distinguished, it will be described as "electrode 12" in the present specification. The electrode 12 functions as a common electrode disposed opposite to the plurality of pixel electrodes 11. The electrode 12 is commonly provided for the plurality of pixel electrodes 11. Further, as shown in FIG. 2, one or more slits 112 are provided in the electrode 12.

[0014] As shown in FIG. 2, in the active matrix substrate 10, from the touch surface side, the electrode 12, the first touch signal line 13a, the first insulating layer 14a, the second touch signal line 13b, the third insulating layer 14c, the pixel electrode 11, the third insulating layer 14c, the gate line 15 (see FIG. 3), the fourth insulating layer 14d, the semiconductor layer 16 (see FIG. 3), and the drain electrode 17 (see FIG. 3), the fifth insulating layer 14e, the source line 18, and the glass substrate 10a are arranged in this order. Also, in plan view, the electrode 12 is arranged to overlap the pixel electrode 11.

[0015] FIG. 4 is a schematic plan view for explaining the connection between the gate driver 51 and the source driver 52 and the thin film transistor 60. The active matrix substrate 10 is provided with a gate driver 51 and a source driver 52. The plurality of gate lines 15 and the plurality of source lines 18 intersect with each other and are formed in a grid pattern in plan view. Further, as shown in FIG. 4, a thin film transistor 60 is provided in a region surrounded by the plurality of gate lines 15 and the plurality of source lines 18.

[0016] Figure 5 is a schematic circuit diagram illustrating the connection between the thin-film transistor 60 and the gate line 15 and source line 18. As shown in Figure 5, the gate electrode of the thin-film transistor 60 is connected to the gate line 15, and the source electrode of the thin-film transistor 60 is connected to the source line 18. The drain electrode of the thin-film transistor 60 is connected to the pixel electrode 11 via a contact hole 11a (see Figure 3).

[0017] Furthermore, multiple gate lines 15 connect each of the multiple thin-film transistors 60 to the gate driver 51. Multiple source lines 18 connect each of the multiple thin-film transistors 60 to the source driver 52. The gate driver 51 and source driver 52 are each located in the frame region outside the display area E1 (see Figure 4) where the multiple pixel electrodes 11 are arranged. The gate driver 51 may be formed by forming a circuit on the glass substrate 10a (it may be formed monolithically) or it may be composed of an integrated circuit. The source driver 52 is, for example, composed of an integrated circuit. The gate driver 51 sequentially supplies gate signals (scanning signals) to each of the multiple gate lines 15. Specifically, the gate driver 51 sequentially applies voltage to the multiple gate lines 15 at a predetermined frequency (scans) based on a horizontal synchronization signal from the controller 2. The source driver 52 supplies source signals (data signals) to each of the multiple source lines 18.

[0018] Figure 6 is a schematic plan view illustrating the arrangement relationship between the drive electrode 12a and the gate line 15. Note that in Figure 6, for ease of explanation, the shape of the drive electrode 12a is simplified to a rectangular shape. The active matrix substrate 10 is provided with a touch detection driver 53. The touch detection driver 53 includes an integrated circuit that performs control processing related to touch detection. The touch detection driver 53 supplies a drive signal dm to a plurality of drive electrodes 12a via a first touch signal line 13a and a second touch signal line 13b (wiring 13ba). The touch detection driver 53 also acquires detection signals from a plurality of detection electrodes 12b via the first touch signal line 13a. In other words, the touch panel 1 is capable of performing mutual capacitance-based touch detection. Note that the touch panel 1 may be configured to perform not only mutual capacitance-based touch detection but also self-capacitance-based touch detection. In mutual capacitance-based touch detection, the touch panel 1 detects the touch position using a unit cell 70 (described later) as a single coordinate (node).

[0019] Each of the multiple drive electrodes 12a is a transmitter electrode (Tx) to which a drive signal dm is supplied. Each of the multiple drive electrodes 12a extends in the direction in which the gate line 15 (see Figure 6) extends (X direction) and is arranged in a direction perpendicular to the X direction (Y direction). Note that in Figure 6, four rows (20 electrodes) of drive electrodes 12a are shown for the sake of explanation, but the number of drive electrodes 12a is not limited to this.

[0020] Furthermore, as shown in Figure 6, the drive electrodes 12a are designated as Tx1, Tx2, Tx3, and Tx4 in order from top to bottom in Figure 6. The multiple gate lines 15 are designated as gate line groups 15a, 15b, 15c, and 15d in order from top to bottom in Figure 6. In a plan view, Tx1, Tx2, Tx3, and Tx4 are arranged overlapping with gate line groups 15a, 15b, 15c, and 15d, respectively. Figure 7 is a diagram illustrating the configuration of gate line group 15a. As shown in Figure 7, gate line group 15a contains multiple gate lines 15, but in Figure 6, for the sake of clarity, it is shown as a single line.

[0021] Figure 8 is a plan view illustrating the arrangement of the drive electrode 12a, the detection electrode 12b, and the counter electrode 12c. As shown in Figure 8, the electrode 12 includes the drive electrode 12a, the detection electrode 12b, and the counter electrode 12c. The drive electrode 12a, the detection electrode 12b, and the counter electrode 12c are formed in the same layer from the same material (e.g., ITO: Indium Tin Oxide). The plurality of first touch signal lines 13a include wiring 13aa connected to the drive electrode 12a. The plurality of second touch signal lines 13b include wiring 13bb connected to the detection electrode 12b, wiring connected to the counter electrode 12c (not shown), and wiring 13ba connected to the wiring 13aa via a contact hole C1b and connected to the touch detection driver 53. The electrode 12 may be made of a material other than ITO (e.g., metal (copper, silver, or gold)). The multiple first touch signal lines 13a and the multiple second touch signal lines 13b are made of, for example, metal (copper, silver, or gold).

[0022] As shown in Figure 6, a portion of the counter electrode 13c is positioned between a plurality of drive electrodes 12a aligned in the X direction. The plurality of drive electrodes 12a are connected to wiring 13aa by contact holes C1a. The plurality of drive electrodes 12a aligned in the X direction are connected by wiring 13aa. The drive electrodes 12a have a grid shape consisting of a portion extending in the X direction and a portion extending in the Y direction. The plurality of drive electrodes 12a are sequentially supplied with a drive signal one row at a time (a plurality of drive electrodes 12a aligned in the X direction).

[0023] Multiple detection electrodes 12b are arranged to fill the gaps in the grid shape of the drive electrode 12a. The detection electrodes 12b are connected to wiring 13bb and contact holes C2. Here, as shown in Figure 8, the wiring 13bb connected to the detection electrode 12b is connected to a portion of the detection electrode 12b to which the wiring 13bb is connected that is further away from the wiring 13aa than the center position A1 (or center position A2) in the X direction. That is, the wiring 13bb is located at a distance from the wiring 13aa (at least one pixel away). The detection electrode 12b forms a capacitance with the drive electrode 12a. As a result, when an indicator is present between the detection electrode 12b and the drive electrode 12a, the capacitance value of the detection electrode 12b changes, and a detection signal containing information about the change is input to the touch detection driver 53. Based on the detection signals from each detection electrode 12b, the touch detection driver 53 determines whether or not there is a touch by the indicator and detects the touched position.

[0024] The counter electrode 12c is formed in a rectangular (square) shape so as to surround the drive electrode 12a and the detection electrode 12b in a plan view. The counter electrode 12c also includes a first portion 12ca positioned between two adjacent drive electrodes 12a and a second portion 12cb positioned between two adjacent detection electrodes 12b. A voltage is applied to the counter electrode 12c to generate an electric field between it and the pixel electrode 11.

[0025] Furthermore, since the counter electrode 12c is electrically isolated from the drive electrode 12a and the detection electrode 12b, the capacitance, resistance, etc. of the counter electrode 12c do not become a load on the drive electrode 12a and the detection electrode 12b. Also, in the first embodiment, since the contact hole C1b and the wiring 13ba are positioned to overlap the first portion 12ca of the counter electrode 12c, the load on the contact hole C1b and the wiring 13ba can be reduced compared to the case where the contact hole C1b and the wiring 13ba are positioned to overlap the detection electrode 12b, and variations in capacitance across the entire surface of the touch panel 1 can be suppressed. The wiring 13ba is positioned at a distance from the detection electrode 12b (at least one pixel away). This reduces the capacitance formed between the wiring 13ba and the detection electrode 12b. Here, if the wiring is positioned close to the detection electrode, the capacitance of that detection electrode will be larger than that of other detection electrodes, causing variations in the capacitance of multiple detection electrodes in the touch panel. In contrast, in the first embodiment, since the wiring 13ba and the detection electrode 12b are arranged separately, it is possible to prevent variations in the capacitance of the multiple detection electrodes 12b in the touch panel 1. As a result, the sensitivity of touch detection in the touch panel 1 is made uniform, and the overall sensitivity of the touch panel 1 can be improved. Furthermore, since the shape of the drive electrode 12a and the shape of the detection electrode 12b are not the same, the balance between the touch detection performance and the load can be adjusted by changing at least one of the dimensions of the drive electrode 12a and the dimensions of the detection electrode 12b.

[0026] Figure 9 is a diagram illustrating the unit cell 70. As shown in Figure 9, the drive electrode 12a, the nine detection electrodes 12b, and the counter electrode 12c constitute one coordinate system (unit cell 70) for touch position detection. As a result, the counter electrode 12c is contained within one unit cell 70, reducing the area of ​​the drive electrode 12a and the nine detection electrodes 12b per unit cell 70, thereby reducing the load on the touch panel 1.

[0027] (Control method according to the first embodiment) Referring to Figure 10, the control method of the display device 100 according to the first embodiment will be described. Figure 10 is a timing chart for illustrating the timing of transmitting the gate signal and drive signal dm according to the first embodiment. The display device 100 of the first embodiment is driven by a mask drive drive method. That is, the touch detection driver 53 supplies a drive signal dm to the other drive electrodes 12a while a gate signal is supplied to the gate line 15 which is arranged to overlap one of the multiple drive electrodes 12a. The touch detection driver 53 also supplies a drive signal dm to at least one of the multiple drive electrodes 12a while a gate signal is supplied to the gate line 15 which is arranged to overlap one of the multiple detection electrodes 12b.

[0028] For example, as shown in Figure 10, gate signals are supplied sequentially to gate line groups 15a to 15d within the period of one frame (within one cycle of the vertical synchronization signal). In a plan view, during the period when a gate signal is supplied to gate line group 15a that overlaps with Tx1 (see Figure 6), no drive signal dm is supplied to Tx1 (driving Tx1 is prohibited). Also, in a plan view, during the period when a gate signal is supplied to gate line group 15b that overlaps with Tx2, no drive signal dm is supplied to Tx2 (driving Tx2 is prohibited), and a drive signal dm is supplied to Tx1. Also, in a plan view, during the period when a gate signal is supplied to gate line group 15c that overlaps with Tx3, no drive signal dm is supplied to Tx3, and a drive signal dm is supplied to Tx2. Furthermore, in a plan view, during the period when a gate signal is supplied to the gate line group 15d that overlaps Tx4, the drive signal dm is not supplied to Tx4, but to Tx3. Also, during the pause period after the drive signal dm is supplied to Tx3 (the period when no gate signal is supplied to any of the gate line groups 15a to 15d), the drive signal dm is supplied to Tx4.

[0029] The touch detection driver 53 then detects a touch of an object, such as a finger, based on the detection signals obtained from each of the multiple detection electrodes 12b. For example, the touch detection driver 53 aggregates the detection signals obtained from the multiple detection electrodes 12b within the period of one frame. The touch detection driver 53 then obtains the touch position based on the aggregated data (map-like data). The touch detection driver 53 then outputs the touch position to the controller 2. With this configuration, when performing touch detection, display and touch detection can be performed simultaneously while preventing the impact of touch detection on the display and the impact of the display on touch detection.

[0030] [Second Embodiment] Next, the configuration of the touch panel-integrated display device 200 (hereinafter referred to as "display device 200") of the second embodiment will be described with reference to Figures 11 to 14. In the display device 200 of the second embodiment, the third portion 212cc of the counter electrode 212c is positioned between the drive electrode 212a and the detection electrode 212b. In the following description, when the same reference numerals as in the first embodiment are used, it indicates the same configuration as in the first embodiment, and unless otherwise specified, refer to the preceding description.

[0031] Figure 11 shows the configuration of the touch panel 201 of the display device 200 according to the second embodiment. Figure 12 shows the configuration of the drive electrode 212a according to the second embodiment. As shown in Figure 11, the display device 200 includes a touch panel 201. The touch panel 201 includes a drive electrode 212a, a detection electrode 212b, and a counter electrode 212c. As shown in Figure 12, the drive electrode 212a has a grid shape consisting of a portion 221 extending vertically (Y direction) and a portion 222 extending horizontally (X direction). As shown in Figure 11, portion 222 includes a portion 222a that overlaps with a part of the wiring 12bb in a plan view, and a portion 222b that does not overlap with a part of the wiring 12bb in a plan view.

[0032] As shown in Figure 12, in the direction in which the wiring 12bb extends (Y direction), the width W1 of portion 222a is smaller than the width W2 of portion 222b. This reduces the capacitance between the drive electrode 212a and the wiring 12bb. As a result, capacitance that does not contribute to touch detection can be reduced.

[0033] Furthermore, as shown in Figure 11, the wiring 12bb is connected to a portion of the detection electrode 212b to which the wiring 12bb is connected that is further away from the wiring 12aa than the center position A11 (or A12) in the direction in which the wiring 12aa extends. This reduces the capacitance between the wiring 12bb and the wiring 12aa. As a result, the capacitance that does not contribute to touch detection can be reduced.

[0034] Furthermore, as shown in Figure 11, the counter electrode 212c includes a third portion 212cc positioned between the portion 222 of the drive electrode 12a and the detection electrode 212b, respectively.

[0035] Figure 13 is a cross-sectional view showing the configuration of touch panel 201C according to a comparative example. Figure 14 is a cross-sectional view showing the configuration of touch panel 201 according to the second embodiment. Here, as shown in Figure 13, in touch panel 201C according to a comparative example, the drive electrode 212aC and the detection electrode 212bC are arranged adjacent to each other. As a result, a large electrostatic coupling CC is formed between the drive electrode 212aC and the detection electrode 212bC regardless of whether or not there is a touch by the indicator F. Since the capacitance due to this electrostatic coupling CC does not change depending on whether or not there is a touch, it does not contribute to touch detection. In contrast, as shown in Figure 14, in touch panel 201 according to the second embodiment, a third portion 212cc is arranged between the drive electrode 212a and the detection electrode 212b. As a result, the electrostatic coupling between the drive electrode 212a and the detection electrode 212b that does not contribute to touch detection is reduced, and the capacitance that does not change depending on whether or not there is a touch can be reduced. As a result, the component of the detection signal that contributes to touch detection can be increased.

[0036] [Deformation, etc.] The embodiments and modifications described above are merely illustrative examples for implementing this disclosure. Therefore, this disclosure is not limited to the embodiments described above, and it is possible to implement the embodiments described above by modifying them as appropriate without departing from the spirit of the disclosure.

[0037] (1) In the first and second embodiments described above, examples were shown in which the counter electrodes are arranged to surround the drive electrode and the detection electrode, but the disclosure is not limited thereto. For example, the counter electrodes may be arranged only on one side of the drive electrode or the detection electrode.

[0038] (2) In the first and second embodiments described above, the first touch signal line is shown to be located above the second touch signal line, but the disclosure is not limited thereto. For example, the first touch signal line may be located below the second touch signal line.

[0039] (3) In the first and second embodiments described above, examples were shown in which the drive electrode was configured in a grid shape and the detection electrode was configured in a rectangular shape, but the disclosure is not limited thereto. The drive electrode may be formed in a rectangular, circular, or frame shape, and the detection electrode may be formed in a grid shape or a circular shape.

[0040] (4) In the first and second embodiments described above, an example was shown in which the contact hole C1b connecting the wiring 13aa and the wiring 13ba is provided at a position that overlaps with the opposing electrode 12c in a plan view, but the disclosure is not limited thereto. For example, the contact hole C1b may be provided at a position that overlaps with the drive electrode 12a or the detection electrode 12b in a plan view.

[0041] (5) In the second embodiment described above, an example was shown in which a third portion 212cc is provided on the counter electrode 212c, but the disclosure is not limited thereto. For example, in the touch panel 301 according to the first modified example of the second embodiment shown in Figure 15, the counter electrode 312c is not provided with a third portion 212cc, and the portion 222 of the drive electrode 212a and the detection electrode 312b are adjacent to each other.

[0042] (6) In the first and second embodiments described above, examples were shown in which the wiring 13ba is located at a position at least one pixel away from the detection electrode 12b, but the disclosure is not limited thereto. For example, in the touch panel 401 according to the second modification of the second embodiment shown in Figure 16, the wiring 413ba is located adjacent to the detection electrode 312b in a plan view.

[0043] (7) In the first and second embodiments described above, examples were shown in which the touch panel is driven by a mask drive method, but the disclosure is not limited thereto. The touch panel may be used to perform image display and touch detection in a time-division manner by separating the period for displaying an image from the period for performing touch detection.

[0044] The configuration described above can be explained as follows.

[0045] A touch panel-integrated display device according to the first configuration includes a pixel electrode, a counter electrode disposed opposite to the pixel electrode and formed in a first layer, a plurality of drive electrodes formed in the first layer, and a plurality of detection electrodes formed in the first layer and forming capacitance with the drive electrodes. The counter electrode includes a first portion disposed between the plurality of drive electrodes and a second portion disposed between the plurality of detection electrodes (first configuration).

[0046] According to the first configuration described above, the first portion of the counter electrode is positioned between multiple drive electrodes, and the second portion of the counter electrode is positioned between multiple detection electrodes, thereby reducing the size of each drive electrode and each detection electrode. This reduces the load on the drive electrodes and the load on the detection electrodes. Since the load on the drive electrodes and the load on the detection electrodes are reduced, the touch panel integrated display device can be made larger.

[0047] In the first configuration, the touch panel-integrated display device may further include drive electrode connection wiring for connecting the plurality of drive electrodes, which is formed in a second layer that is a different layer from the first layer (second configuration).

[0048] According to the second configuration described above, even when the first portion of the opposing electrode is positioned between multiple drive electrodes, the multiple drive electrodes can be electrically connected by drive electrode connection wiring.

[0049] In the second configuration, the touch panel-integrated display device may further include a drive signal supply wiring connected to the drive electrode connection wiring at a position that overlaps with the opposing electrode in a plan view, and a drive signal supply circuit that supplies drive signals to the plurality of drive electrodes via the drive signal supply wiring (third configuration).

[0050] According to the third configuration described above, it is possible to prevent an increase in capacitance between the detection electrode and the drive signal supply wiring compared to the case where the drive signal supply wiring overlaps with the detection electrode in a plan view.

[0051] In any one of the first to third configurations, the counter electrode may be configured to surround at least one of the plurality of drive electrodes and at least one of the plurality of detection electrodes (fourth configuration). In the fourth configuration, the counter electrode may be configured to surround the plurality of detection electrodes (fifth configuration).

[0052] According to the fourth or fifth configuration described above, since the counter electrodes not used for touch detection are positioned around at least one of the multiple drive electrodes or at least one of the multiple detection electrodes, it is possible to prevent the counter electrodes from affecting touch detection.

[0053] In any one of the first to fifth configurations, the touch panel-integrated display device may further include a plurality of thin-film transistors, a plurality of gate lines connected to the plurality of thin-film transistors and extending in a first direction, arranged in a second direction perpendicular to the first direction, a gate drive control circuit that sequentially supplies gate signals to the plurality of gate lines, and a drive signal supply circuit that supplies drive signals to the plurality of drive electrodes. The plurality of drive electrodes may include a plurality of drive electrode groups arranged in the second direction. Each of the plurality of drive electrode groups may be arranged overlapping any one of the plurality of gate lines. The drive signal supply circuit may be configured to supply the drive signal to other drive electrode groups among the plurality of drive electrode groups while the gate signal is being supplied to a gate line arranged overlapping any one of the plurality of drive electrode groups (sixth configuration).

[0054] According to the sixth configuration described above, the touch panel-integrated display device can simultaneously perform image display and touch detection.

[0055] In any one of the first to sixth configurations, the touch panel-integrated display device may further include detection electrode connection wiring for connecting the plurality of detection electrodes, which is formed in a third layer that is a different layer from the first layer (seventh configuration).

[0056] According to the seventh configuration described above, even when the second portion of the counter electrode is positioned between multiple detection electrodes, the multiple detection electrodes can be electrically connected by detection electrode connection wiring.

[0057] In the seventh configuration, at least one of the plurality of drive electrodes may include a portion that overlaps with a portion of the detection electrode connection wiring in a plan view, and a portion that does not overlap with a portion of the detection electrode connection wiring in a plan view. In the direction in which the detection electrode connection wiring extends, the length of the portion that overlaps with a portion of the detection electrode connection wiring in a plan view may be smaller than the length of the portion that does not overlap with a portion of the detection electrode connection wiring in a plan view (eighth configuration).

[0058] According to the eighth configuration described above, the capacitance between the drive electrode and the detection electrode connection wiring can be reduced. As a result, the capacitance that does not contribute to touch detection can be reduced.

[0059] In the seventh or eighth configuration, the touch panel-integrated display device may further include drive electrode connection wiring for connecting the plurality of drive electrodes, which is formed in a second layer that is a different layer from the first layer. The detection electrode connection wiring may be configured to be connected to a portion of the detection electrode to which the detection electrode connection wiring is connected that is further away from the drive electrode connection wiring than the center position of the detection electrode to which the detection electrode connection wiring is connected in the direction in which the drive electrode connection wiring extends (ninth configuration).

[0060] According to the ninth configuration described above, the capacitance between the drive electrode connection wiring and the detection electrode connection wiring can be reduced. As a result, the capacitance that does not contribute to touch detection can be reduced.

[0061] In any one of the first to ninth configurations, the counter electrode may further include a third portion positioned between any one of the plurality of drive electrodes and any one of the plurality of detection electrodes (tenth configuration).

[0062] Here, when the drive electrode and the detection electrode are in close proximity, the capacitance formed near the boundary between the drive electrode and the detection electrode does not contribute to touch detection. That is, because the distance between the drive electrode and the detection electrode becomes too small compared to the distance between the drive electrode and the indicator and the distance between the detection electrode and the indicator, the capacitance due to the presence or absence of the indicator becomes small compared to the capacitance formed in the vicinity (unchanging capacitance). Therefore, according to the 10th configuration described above, the third portion of the counter electrode is placed between the drive electrode and the detection electrode, so the distance between the drive electrode and the detection electrode can be increased. As a result, the capacitance that does not contribute to touch detection can be reduced. [Explanation of Symbols]

[0063] 1: Touch panel, 2: Controller, 10: Active matrix substrate, 10a: Glass substrate, 11: Pixel electrode, 11a: Contact hole, 12: Electrode, 12a: Drive electrode, 12aa: Wiring, 12b: Detect electrode, 12bb: Wiring, 12c: Counter electrode, 12ca: First part, 12cb: Second part, 13a: First touch signal line, 13aa: Wiring, 13b: Second touch signal line, 13ba: Wiring, 13bb: Wiring, 13c: Counter electrode, 14a: First insulating layer, 14c: Third insulating layer, 14d: Fourth insulating layer, 14e: Fifth insulating layer, 15: Gate line, 15a: Gate line group, 15b: Gate line group, 15c: Gate line group, 15d: Gate line group, 16: Semiconductor layer, 17: Drain electrode, 18: Source line, 20: Counter substrate, 30: Liquid crystal Layer, 40a: Polarizer, 51: Gate driver, 52: Source driver, 53: Touch detection driver, 60: Thin-film transistor, 70: Unit cell, 100: Touch panel integrated display device, 112: Slit, 200: Touch panel integrated display device, 201: Touch panel, 212a: Drive electrode, 212b: Detection electrode, 212c: Counter electrode, 212cc: Third part, 221: Part, 222: Part, 222a: Part, 222b: Part, 301: Touch panel, 312b: Detection electrode, 312c: Counter electrode, 401: Touch panel, 413ba: Wiring, A1: Center position, A11: Center position, A2: Center position, C1a: Contact hole, C1b: Contact hole, C2: Contact hole, E1: Display area, dm: Drive signal

Claims

1. Pixel electrodes and A plurality of unit cells comprising a counter electrode arranged opposite to the pixel electrode, the counter electrode formed in a first layer, a plurality of drive electrodes formed in the first layer, and a plurality of detection electrodes formed in the first layer, the detection electrodes forming capacitance between themselves and the drive electrodes, The aforementioned counter electrode is A first drive electrode located in a first unit cell among the plurality of unit cells, a second drive electrode located in a second unit cell adjacent to the first unit cell among the plurality of unit cells, and a first portion located adjacent to the first drive electrode and the second drive electrode, A touch panel-integrated display device comprising: a first detection electrode arranged in the first unit cell; a second detection electrode arranged in the second unit cell; and a second portion arranged adjacent to the first detection electrode and the second detection electrode, the second portion positioned between the first detection electrode and the second detection electrode.

2. The touch panel-integrated display device according to claim 1, further comprising a drive electrode connection wiring for connecting the plurality of drive electrodes, the drive electrode connection wiring being formed in a second layer which is a layer separate from the first layer.

3. At a position that overlaps with the counter electrode in a plan view, a drive signal supply wiring connected to the drive electrode connection wiring, The touch panel-integrated display device according to claim 2, further comprising a drive signal supply circuit that supplies drive signals to the plurality of drive electrodes via the drive signal supply wiring.

4. The touch panel-integrated display device according to claim 1, wherein the counter electrode surrounds at least one of the plurality of drive electrodes and at least one of the plurality of detection electrodes.

5. The touch panel-integrated display device according to claim 4, wherein the counter electrode surrounds the plurality of detection electrodes.

6. The touch panel-integrated display device according to claim 1, further comprising detection electrode connection wiring for connecting the plurality of detection electrodes, the detection electrode connection wiring being formed in a third layer which is a layer different from the first layer.

7. At least one of the aforementioned plurality of drive electrodes is A portion of the aforementioned detection electrode connection wiring overlaps with a portion in a plan view, The detection electrode connection wiring includes a portion that does not overlap in a plan view, The touch panel-integrated display device according to claim 6, wherein, in the direction in which the detection electrode connection wiring extends, the length of the portion that overlaps the detection electrode connection wiring in a plan view is smaller than the length of the portion that does not overlap the detection electrode connection wiring in a plan view.

8. The drive electrode connection wiring for connecting the plurality of drive electrodes further comprises a drive electrode connection wiring formed in a second layer which is a layer different from the first layer, The touch panel-integrated display device according to claim 6, wherein the detection electrode connection wiring is connected to a portion of the detection electrode to which the detection electrode connection wiring is connected that is further away from the drive electrode connection wiring than the center position of the detection electrode to which the drive electrode connection wiring is connected, in the direction in which the drive electrode connection wiring extends.

9. The touch panel-integrated display device according to claim 1, wherein the counter electrode further includes a third portion disposed between any one of the plurality of drive electrodes and any one of the plurality of detection electrodes.

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