JP2022058495A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch detection device capable of improving detection performance by decreasing coupling among wirings, and a display device comprising the same.

SOLUTION: A display device comprises: a first substrate; a second substrate which faces a first region of the first substrate and does not face a second region of the first substrate; a plurality of pixels arranged in the first region; a plurality of detection electrodes arranged in the first region; a drive circuit arranged in the second region; a plurality of first wirings which is arranged in the second region and extends in parallel with a lengthwise direction of the drive circuit; a plurality of second wirings which connect the drive circuit with the plurality of detection electrodes; and an insulation layer which is positioned between the plurality of first wirings and the plurality of second wirings. The plurality of second wirings intersect with the plurality of first wirings at an angle other than 90° in a plane view.

SELECTED DRAWING: Figure 9A

COPYRIGHT: (C)2022,JPO&INPIT

Description

Embodiments of the present invention relate to display devices.

In recent years, a touch sensor (touch detection device) has been used as an interface of a display device. The touch sensor includes a plurality of first detection electrodes provided with a detection region, a plurality of second detection electrodes provided in the detection region intersecting with the first detection electrode, and a first detection electrode and a second detection electrode. It has an insulating layer provided between the two. Further, the plurality of first wirings connected to the plurality of first detection electrodes are provided in an outer region (frame region) located outside the detection region. Similarly, the plurality of second wirings connected to the second detection electrode are provided in the outer region (frame region) and extend so as to overlap the first wiring.

Japanese Unexamined Patent Publication No. 2013-105275

In the above-mentioned touch sensor, the first wiring and the second wiring have portions that are provided so as to be overlapped with each other or arranged side by side in parallel. Therefore, coupling (parasitic capacitance) is likely to occur between the first wiring and the second wiring. This coupling appears as noise in touch detection and may degrade touch detection.
An object of the embodiment is to provide a touch detection device capable of reducing coupling between wirings and improving detection performance, and a display device including the touch detection device.

The display device according to the embodiment includes a first substrate and a second substrate facing the first region of the first substrate and not facing the second region of the first substrate, and is arranged in the first region. A plurality of pixels, a plurality of detection electrodes arranged in the first region, a drive circuit arranged in the second region, and a drive circuit arranged in the second region and parallel to the length direction of the drive circuit. Located between the plurality of first wirings extending to, the plurality of second wirings connecting the drive circuit and the plurality of detection electrodes, and the plurality of first wirings and the plurality of second wirings. It has an insulating layer, and the plurality of second wirings intersect with the plurality of first wirings at an angle other than 90 degrees in a plan view.

FIG. 1 is a perspective view showing a display device according to the first embodiment. FIG. 2 is a plan view schematically showing a touch detection device (touch sensor) provided in the display device. FIG. 3 is a block diagram schematically showing an example of a Tx drive circuit of a touch sensor. FIG. 4 is a timing chart showing the drive timing of the touch sensor. FIG. 5 is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring between the switch and the Tx scanner in the Tx drive circuit. FIG. 6A is a cross-sectional view of the display panel taken along line BB of FIG. FIG. 6B is a cross-sectional view of the control wiring along the line BB of FIG. FIG. 7 is a plan view schematically showing an arrangement structure of signal lines provided in a non-display area of the first substrate. FIG. 8A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the first modification. FIG. 8B is a cross-sectional view of the control wiring along the line CC of FIG. 8A. FIG. 9A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the second modification. 9B is a cross-sectional view of the control wiring along the lines DD of FIG. 9A. FIG. 10A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the third modification. FIG. 10B is a cross-sectional view of the control wiring along the line EE of FIG. 10A. FIG. 11A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the fourth modification. FIG. 11B is a cross-sectional view of the arrangement structure in the fifth modification along the line FF of FIG. 11A. FIG. 12 is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the fifth modification. FIG. 13 is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring in the Tx drive circuit of the touch detection device according to the sixth modification. FIG. 14 is a cross-sectional view of the arrangement structure in the sixth modification along the line GG of FIG. FIG. 15 is a plan view schematically showing an electrode structure and a wiring structure of a touch detection device in the display device according to the second embodiment. FIG. 16 is a plan view schematically showing an example of the wiring structure according to the second embodiment. FIG. 17 is a plan view schematically showing a seventh modification of the wiring structure according to the second embodiment. FIG. 18 is a plan view schematically showing an eighth modification of the wiring structure according to the second embodiment. FIG. 19 is a cross-sectional view of the display device and the touch detection device according to the third embodiment. FIG. 20 is a plan view schematically showing an electrode structure and a wiring structure of the touch detection device according to the third embodiment. FIG. 21 is a plan view schematically showing a ninth modification of the wiring structure according to the third embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
It should be noted that the disclosure is merely an example, and those skilled in the art who are appropriately modified while maintaining the gist of the invention and which can be easily conceived are naturally included in the scope of the present invention. Further, in order to clarify the explanation, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual embodiment, but this is just an example, and the interpretation of the present invention is used. It is not limited. Further, in the present specification and each figure, the same elements as those described above with respect to the above-mentioned figures may be designated by the same reference numerals, and detailed description thereof may be omitted as appropriate.

(First Embodiment)
FIG. 1 is a perspective view schematically showing a display device according to the first embodiment.
As an example of the display device 10, a liquid crystal display device will be described. The display device 10 can be used by being incorporated into various electronic devices such as smartphones, tablet terminals, mobile phones, notebook type PCs, portable game machines, video cameras, electronic dictionaries, in-vehicle devices, and television image receiving devices. can. The main configuration disclosed in this embodiment is a self-luminous display device having an organic electrochromism display element or the like, an electronic paper type display device having an electrophoretic element or the like, and a MEMS (Micro Electro Mechanical Systems). It can also be applied to an applied display device or a display device to which electrochromism is applied.

As shown in FIG. 1, the display device 10 includes an active matrix type display panel (liquid crystal display panel) 12, a drive IC chip (drive element) 14 for driving the display panel 12, and an object to be detected, for example, a finger. A touch sensor (touch detection device) 16 for detecting approach or contact, a touch control IC (drive element) 18 for driving the touch sensor 16, a first flexible wiring board (FPC) 20 and a first flexible wiring board (FPC) 20 joined to a display panel 12. 2 Flexible wiring board (FPC) 22 and. The drive IC chip 14 is mounted on the display panel 12. The touch control IC 18 is mounted on the second FPC 22, for example, and is connected to the first FPC 20 and the drive IC chip 14 via the connector 24.

The display panel 12 has a rectangular flat plate-shaped first substrate (array substrate) SUB1, a rectangular flat plate-shaped second substrate (opposing substrate) SUB2 arranged to face the first substrate SUB1, and a first substrate SUB1 and a second substrate SUB2. It is provided with a liquid crystal layer (liquid crystal layer LQ described later) held between the two. The first substrate SUB1 and the second substrate SUB2 are formed by using, for example, an insulating substrate (insulating layer) having light transmittance such as a glass substrate or a resin substrate. The first substrate SUB1 and the second substrate SUB2 are bonded by the sealing material SE in a state where a predetermined cell gap is formed between them. The liquid crystal layer LQ is held inside surrounded by the sealing material SE in the cell gap between the first substrate SUB1 and the second substrate SUB2.

The display panel 12 has a display area DA for displaying an image and a display in a region inside the sealing material SE in a plan view (meaning a state in which the display panel is viewed from a direction perpendicular to the display panel 12; the same applies hereinafter). A frame-shaped non-display area ED surrounding the area DA is provided. In the present embodiment, the display area DA also serves as a touch detection area for detecting the approach and touch of a finger or the like. Further, the non-display area ED also serves as a non-detection area.
The display panel 12 includes a plurality of pixels PX arranged in a matrix in the display area DA. The first substrate SUB1 has a source line S extending in the first direction X, a gate line G extending in the second direction Y orthogonal to the first direction X, a gate line G in each pixel PX, and a gate line G in the display area DA. It includes a switching element SW electrically connected to the source line S, a pixel electrode PE connected to the switching element SW in each pixel PX, and the like. The common electrode CE having a common potential is provided on the first substrate SUB1 or the second substrate SUB2 and faces a plurality of pixel electrodes PE. The gate line G may not be formed in a straight line parallel to the first direction X, and the source line S may not be formed in a straight line parallel to the second direction Y. That is, the gate line G and the source line S may be bent or partially branched.

The display panel 12 is, for example, a transmissive type having a transmissive display function of displaying an image by selectively transmitting light from a backlight device. Even if the display panel 12 is a reflection type having a reflection display function of displaying an image by selectively reflecting light from the display surface side such as external light or auxiliary light in addition to the transmission display function. good. Further, the display panel 12 may be a semi-transmissive type having a transparent display function and a reflective display function.
The display panel 12 may have a configuration corresponding to a lateral electric field mode that mainly uses a transverse electric field substantially parallel to the main surface of the substrate as a display mode, or mainly uses a longitudinal electric field substantially perpendicular to the main surface of the substrate. It may have a configuration corresponding to the vertical electric field mode.

FIG. 2 is a plan view of a display panel schematically showing an example of the electrode structure of the touch sensor 16. As shown in FIG. 2, the touch sensor 16 includes a plurality of touch sensors 16 provided on the first substrate SUB1, for example, 33 first detection electrodes Tx1 to Txn, and the upper surface (first) of the second substrate SUB2 which is an insulating layer. It is provided with a plurality of second detection electrodes Rx1 to Rxn provided on the surface opposite to the substrate SUB1), for example, 63 second detection electrodes Rx1 to Rxn. In order to avoid complication of the drawing, FIG. 2 shows the number of electrodes reduced and schematically. The first detection electrodes Tx1 to Txn are formed in a striped shape and extend along the longitudinal direction (first direction X) of the first substrate SUB1. Further, the first detection electrodes Tx1 to Txn are arranged in parallel with each other at a predetermined interval in the width direction (second direction Y) orthogonal to the longitudinal direction. The first detection electrodes Tx1 to Txn are provided so as to face almost the entire surface of the display region (touch detection region) DA. Further, in the present embodiment, the first detection electrodes Tx1 to Txn also serve as the common electrode CE of the display panel 12. The first detection electrodes Tx1 to Txn (common electrode CE) are formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

The second detection electrodes Rx1 to Rxn are formed in a striped shape, respectively, in the width direction (second direction Y) of the second substrate SUB2, that is, in a direction orthogonal to or intersecting the extending direction of the first detection electrodes Tx1 to Txn. It is extended. The second detection electrodes Rx1 to Rxn are arranged in parallel with each other at predetermined intervals in the longitudinal direction of the second substrate SUB2. The second detection electrodes Rx1 to Rxn are provided so as to face almost the entire surface of the display region DA. As a result, the second detection electrodes Rx1 to Rx are arranged so as to intersect the first detection electrodes Tx1 to Txn in the display region DA, and further, the second detection electrodes Tx1 to Txn sandwich the second substrate SUB2. They are arranged one on top of the other.
The second detection electrode Rx is formed of a conductive transparent material. Such a conductive transparent material is, for example, an oxide material such as ITO or IZO. The oxide material preferably contains at least one of indium, tin, zinc, gallium, and titanium. The conductive transparent material is not particularly limited to the oxide material, and may be formed of a conductive organic material, a fine dispersion of a conductive substance, or the like. The second detection electrode Rx is not limited to the above-mentioned transparent material, but includes a group consisting of aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr) and tungsten (W). It may be formed of a conductive film containing a metal layer or an alloy layer made of one or more selected metals. This conductive film is invisible by blackening or meshing.
The first detection electrode Tx is not limited to the first direction X, and may be provided so as to extend in the second direction Y. In this case, the second detection electrode Rx is provided so as to extend in the first direction X.

The touch sensor 16 has a plurality of first control wirings CL1 connected to the first detection electrodes Tx1 to Txn, and a plurality of second control wirings CL2 connected to the second detection electrodes Rx1 to Rx1 respectively. ing. The first control wiring CL1 is a control wiring for electrically connecting each first detection electrode Tx to the shift register SR or the drive IC chip 14. In the present embodiment, the plurality of first control wiring CL1 extends from one end in the longitudinal direction of the first detection electrodes Tx1 to Txn, for example, one end on the drive IC chip 14 side, and passes through the non-display area ED of the display panel 12. And extends to the drive IC chip 14. The first control wiring CL1 will be described in detail later.

The second control wiring CL2 (a, b) is a control wiring for electrically connecting each second detection electrode Rx and the touch control IC 18. The plurality of second control wiring CL2 extends from one end in the longitudinal direction of the second detection electrodes Rx1 to Rxn, and is connected to the second FPC 22 through the non-display area ED of the display panel 12. In the present embodiment, for the second detection electrodes Rx1, Rx3, and Rxn in the odd-numbered rows, the second control wiring CL2a extends from the lower end of the second detection electrode Rx in FIG. And extends to the second FPC22. For the second detection electrodes Rx2, Rx4, to Rxn-1 in an even row, the second control wiring CL2b extends from the upper end of the second detection electrode Rx in FIG. 2 and passes through the hidden region ED on the upper edge side. Further, it extends to the second FPC 22 through the hidden region ED on the short side.
According to the present embodiment, the second FPC 22 is offset to one end side on the short side of the second substrate SUB2, that is, is joined in the vicinity of the lower end in FIG. Therefore, the second control wiring CL2b connected to the second detection electrodes Rx2 and Rx4 to Rxn-a in an even-numbered row extends almost the entire width at the end on the short side of the second substrate SUB2. ..

FIG. 3 is a block diagram schematically showing an example of the drive circuit of the touch sensor 16, and FIG. 4 is a timing chart showing the drive timing of the touch sensor.
As shown in FIG. 3, the touch sensor 16 includes a Tx drive circuit 30 provided on the first substrate SUB1 and sequentially driving a plurality of first detection electrodes Tx1 to Txn. The Tx drive circuit 30 includes a Tx scanner 32 including a plurality of shift registers SR1, SR2, SR3, and a switch SW including a plurality of AND gates N1, N2, N3, switching elements SW1, SW2, and SW3 for outputting selection signals. ing.

The switching element SW1 is provided between the first detection electrode Tx and the TPH line, and by opening and closing according to the select signal TPHSEL from the AND gate N1, a high-level detection drive signal TPH is sent to the first detection electrode Tx. Apply. The switching element SW2 is provided between the first detection electrode Tx and the TPL line, and by opening and closing according to the select signal TPLSEL from the AND gate N2, the low-level detection drive signal TPL is used as the first detection electrode Tx. Apply. The switching element SW3 is provided between the first detection electrode Tx and the Vcom power supply line, and opens and closes according to the select signal VcomSEL from the AND gate N3 to apply the Vcom voltage to the first detection electrode Tx.

The Tx scanner 32 sequentially drives a plurality of shift registers SR1, SR2, SR3 and so on according to a scanner control signal from the drive IC chip 14. The output signals of the shift registers SR1, SR2, SR3 to are input to one of the input terminals of the AND gates N1, N2, and N3. A signal VcomSEL is input from the drive IC chip 14 to the other input terminals of the AND gates N1, N2, and N3.
The drive IC chip 14 inputs a vertical synchronization signal and a horizontal synchronization signal to the touch control IC 18 for touch detection, and the touch control IC 18 drives a drive signal of the first detection electrode Tx according to the input synchronization signal. Input to chip 14. Further, the detection signal detected by the second detection electrode Rx is sent to the touch control IC 18 for touch detection via the second control wiring CL2.

As shown in FIG. 4, the drive IC chip 14 alternately repeats the display period A and the touch detection period B a plurality of times in one horizontal period according to the horizontal synchronization signal. In each display period A, the Tx drive circuit 30 switches the switching element SW3 on and the switching elements SW2 and SW3 off, respectively, and applies a Vcom voltage to the first detection electrode (common electrode) Tx. Further, in the display period A, the drive IC chip 14 supplies the switching signal and the video signal Sigma X to the gate line and the video signal line of the display area DA through the control wiring described later.

In the touch detection period B, the drive IC chip 14 sequentially switches the shift registers SR1, SR2, ... According to the Tx drive signal from the touch control IC 18, and alternately turns the switching elements SW1 and SW2 on and off. As a result, in the touch detection period B, the high level (rank phase) detection drive signal TPH and the low level (opposite phase) detection drive signal TPL are alternately applied to the first detection electrode Tx. When a finger approaches or touches the display surface (detection area) of the display panel 12 in the touch detection period B, a capacitance is added to the second detection electrode Rx centering on the touch position, and the first detection electrode TX and the second detection The capacitance between the electrode RX and the electrode varies. A detection signal including this capacitance fluctuation is sent from the second detection electrode Rx to the touch control IC 18. The touch control IC 18 detects the touch and the touch coordinate position based on the received detection signal.

FIG. 5 is a plan view schematically showing the arrangement structure of the first control wiring CL1 and the second control wiring CL2 between the switch SW and the Tx scanner (shift register SR) 32 in the Tx drive circuit 30.
According to the present embodiment, as shown in FIG. 5, each switch SW of the Tx drive circuit 30 is provided adjacent to one end in the longitudinal direction (end on the drive IC chip 14 side) of the first detection electrodes Tx1 to Txn. , Is directly connected to the ends of the first detection electrodes Tx1 to Txn. The plurality of second control wirings CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are the switch SW and the Tx scanner (shift register) in the non-display area ED on the short side of the second substrate SUB2. It is provided between the SR) 32 and extends substantially parallel to the short side of the second substrate SUB2.

The first control wiring CL1 that sends a control signal to the switch SW extends from the shift registers SR1 to SRn to the corresponding switch SW, respectively. In the present embodiment, each first control wiring CL1 is provided, for example, bent in a staircase shape. That is, each first control wiring CL1 extends from the shift register SR in a direction orthogonal to the second control wiring CL2b, then bends at a right angle, extends in parallel with the second control wiring CL2b, and further bends at a right angle. , Extends to the switch SW in the direction orthogonal to the second control wiring CL2. As a result, a part of the first control wiring CL1 is positioned so as to be orthogonal to the second control wiring, and a part of the first control wiring CL1 is overlapped and extends in parallel with the second control wiring CL2b. As described above, most of the first control wiring CL1 extends at an angle other than parallel to the second control wiring CL2b in a plan view, and in the present embodiment, the first control wiring CL1 extends with respect to the second control wiring CL2b. It extends almost at a right angle, and only a part of it extends almost parallel to the second control wiring CL2b. As a result, the first control wiring CL1 is positioned so as to partially overlap the second control wiring CL2b in a plan view, and does not overlap in parallel over the entire length. Further, as will be described later, since the width W1 of the first control wiring CL1 is very small as compared with the width W2 of the second control wiring CL2b, the area where the first control wiring CL1 and the second control wiring CL2 overlap each other. Also, the overlapping area can be reduced.
In FIG. 5, in order to avoid complication of the drawing, the other plurality of first detection electrodes Tx, the switch SW, and the first control wiring CL1 located in the central portion are omitted.

FIG. 6A is a cross-sectional view of the display panel along the line BB of FIG. As shown in FIGS. 5 and 6A, the width W1 of each first control wiring CL1 is formed to be narrower than the width of the first detection electrode Tx and narrower than the width W2 of the second control wiring CL2. In the embodiment, the width W1 of the first control wiring CL1 is formed to be 1/2 or less, more preferably 1/5 or less of the width W2 of the second control wiring CL2. Since the first control wiring CL1 only transmits a selection signal from the shift register SR to the switch SW, it can be configured with a thin wiring. In the first control wiring CL1, the potential of the wiring from the shift registers SR1 to SRn to the switch SW is, for example, 2.5 to 8V, and the potential of the wiring from the switch SW to the first detection electrode Tx is, for example, 8V. Alternatively, it becomes about 10V.
Each first control wiring CL1 transmits a selection signal to the wiring R1 (TPHSEL) that sends a selection signal to the switch SW1 (TPH), the wiring R2 (TPLSEL) that sends a selection signal to the switch SW2 (TPL), and the switch SW3 (VCOMDC). It is composed of a set of three wires R3 (VcomSEL) to be sent. The combined width of these three wirings R1 to R3 corresponds to the width W1 of the first control wiring CL1. At the overlapping position where the first control wiring CL1 and the second control wiring CL2b overlap, all of the three wirings R1 to R3 constituting the first control wiring CL1 are located overlapping with the common second control wiring CL2b. ..

FIG. 6B is a cross-sectional view schematically showing a cross section of the control wiring along the line BB of FIG. In the wiring structure described above, a second control wiring CL2 that overlaps with the first control wiring CL1 and a second control wiring CL2 that does not overlap with the first control wiring CL1 are generated depending on the intersecting portions. For example, in the cross section shown in FIG. 6B, two second control wiring CL2 (Rx4, Rx6) overlap with the first control wiring CL1, and one second control wiring CL2 (Rx2) overlaps with the first control wiring CL1. It doesn't become. In this case, a coupling occurs between the two overlapping second control wiring CL2 (Rx4, Rx6) and the two first control wiring CL1. Further, as shown by the two-dot chain arrow in FIG. 6B, coupling may occur between the non-overlapping second control wiring CL2 (Rx2) and the adjacent first control wiring CL1. In order to prevent such coupling between the second control wiring CL2 (Rx2) and the first control wiring CL1 that do not overlap with each other, according to the present embodiment, the first control wiring CL1 is configured 3 In the wiring of the book, the wiring R3 (VCOMSEL) having a fixed potential is arranged so as to be closest to the second control wiring CL2 (Rx2) which does not overlap. The wiring R3 is arranged at a boundary portion between a region that overlaps with the second control wiring CL2b and a region that does not overlap. That is, the three wirings R1, R2, and R3 constituting the first control wiring CL1 are arranged in the order of R3, R2, and R1 from the non-overlapping second control wiring CL2 (Rx2) side.
By arranging the first control wiring CL1 in the above arrangement, it is possible to suppress the generation of unnecessary coupling, and more effectively suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. The order of the wirings R2 and R1 may be any.

FIG. 7 is a plan view schematically showing the arrangement structure of the signal line SL provided in the non-display area ED of the first substrate SUB1. As shown in the figure, according to the present embodiment, the plurality of signal lines SL1 extending from the drive IC chip 14 to the source line S or the video signal line of the display area DA are the plurality of switches SW1 to the plurality of switches SW1 in the first substrate SUB1. It is arranged so as to avoid SWn. For example, the signal lines SL1 are arranged between two adjacent switch SWs in a state where a plurality of signal lines SL1 are grouped together.

According to the touch detection device and the liquid crystal display device according to the present embodiment configured as described above, most of the first control wiring CL1 connected to the first detection electrodes Tx1 to Txn for touch detection is parallel. It overlaps with the second control wiring CL2b at a different angle from the above, and the region parallel to the second control wiring CL2 is significantly reduced. At the same time, since the first control wiring CL1 is formed in a narrow width W1 (1/2 or less, preferably 1/5 or less of W2) as compared with the second control wiring CL2b width W2, the first control wiring It is possible to significantly reduce the area (overlapping area) of the portion where CL1 and the second control wiring CL2b overlap. As a result, the coupling capacity formed in the overlapping portion of the first control wiring CL1 and the second control wiring CL2b can be significantly reduced. Therefore, a touch detection device capable of suppressing noise generation and deterioration of touch detection performance in the touch detection region due to the coupling capacitance and realizing stable touch detection over the entire touch detection region, and a display provided with the same. You can get the device.
The number, shape, and forming material of the first detection electrode and the second detection electrode can be appropriately changed without being limited to the first embodiment described above. The first detection electrode of the touch detection device is not limited to the case where it is provided on the first substrate SUB1 of the display panel 12, and the first detection electrode, the insulating layer, and the second detection are superposed on the display surface of the second substrate SUB2. The electrode may be laminated.

Next, a display device and a touch detection device according to various modifications and other embodiments will be described. In the modifications and other embodiments described below, the same parts as those of the first embodiment described above are designated by the same reference numerals to simplify or omit the detailed description thereof, and the first embodiment is performed. The parts that differ from the form will be explained in detail.

(First modification)
FIG. 8A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the first modification. According to the first modification, at least one of the first control wiring CL1 and the second control wiring CL2b overlaps at the overlapping position with an inclination angle with respect to the other control wiring, that is, so as to intersect diagonally. Is extending.
As shown in FIG. 8, in the first modification, the plurality of second control wiring CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are hidden regions on the short side side of the second substrate SUB2. In the ED, the switch SW and the Tx scanner (shift register SR) 32 extend in a direction parallel to the short side of the second substrate SUB2. Further, a part of the plurality of second control wiring CL2, for example, a portion in the vicinity of the Tx scanner 32 has a plurality of inclined portions 64 inclined in a saw blade shape. The inclined portion 64 is inclined at an angle θ, for example, 30 to 90 degrees with respect to the direction parallel to the short side of the second substrate SUB2.

The first control wiring CL1 that sends a control signal to the switch SW extends from the shift registers SR1 to SRn to the corresponding switch SW, respectively. In this modification, each first control wiring CL1 is provided by being bent in a step shape. That is, each first control wiring CL1 extends from the shift register SR in a direction orthogonal to the short side of the second board SUB2, then bends at a right angle, extends parallel to the short side of the second board SUB2, and further. It bends at a right angle and extends to the switch SW. A part of the first control wiring CL1 extends so as to intersect the inclined portion 64 of the second control wiring CL2b. At this time, since the inclined portion 64 is inclined at an angle θ, the first control wiring CL1 also has an inclination angle of an angle θ to 90 degrees and extends so as to intersect with or overlap the second control wiring CL2. As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes uniform, and it is possible to suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance.
Further, the ground layer 60 may be formed on the peripheral edge of the second substrate SUB2 outside the second control wiring CL2. The ground layer 60 is provided so as to overlap the shift register SR.

FIG. 8B is a cross-sectional view schematically showing a cross section of the control wiring along the line CC of FIG. 8A. In the wiring structure described above, a second control wiring CL2 that overlaps with the first control wiring CL1 and a second control wiring CL2 that does not overlap with the first control wiring CL1 are generated depending on the intersecting portions. For example, in the cross section shown in FIG. 8B, two second control wiring CL2 (Rx4, Rx6) overlap with the first control wiring CL1, and one second control wiring CL2 (Rx2) overlaps with the first control wiring CL1. It doesn't become. In this case, a coupling occurs between the two overlapping second control wiring CL2 (Rx4, Rx6) and the two first control wiring CL1. Further, as shown by the two-dot chain arrow in FIG. 8B, coupling may occur between the non-overlapping second control wiring CL2 (Rx2) and the adjacent first control wiring CL1. In order to prevent the occurrence of such coupling between the second control wiring CL2 (Rx2) and the first control wiring CL1 that do not overlap, according to this modification, the first control wiring CL1 is configured 3 In the wiring of the book, the wiring R3 (VCOMSEL) having a fixed potential is arranged so as to be closest to the second control wiring CL2 (Rx2) which does not overlap. The wiring R3 is arranged at a boundary portion between a region that overlaps with the second control wiring CL2b and a region that does not overlap. That is, the three wirings R1, R2, and R3 constituting the first control wiring CL1 are arranged in the order of R3, R2, and R1 from the non-overlapping second control wiring CL2 (Rx2) side.
By arranging the first control wiring CL1 in the above arrangement, it is possible to suppress the generation of unnecessary coupling, and more effectively suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. The order of the wirings R2 and R1 may be any.

(Second modification)
FIG. 9A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the second modification. According to the second modification, at least one of the first control wiring CL1 and the second control wiring CL2b overlaps at the overlapping position with an inclination angle with respect to the other control wiring, that is, so as to intersect diagonally. Is extending.
As shown in FIG. 9, in the second modification, the plurality of second control wiring CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are hidden regions on the short side side of the second substrate SUB2. In the ED, the switch SW and the Tx scanner (shift register SR) 32 extend in a direction parallel to the short side of the second substrate SUB2.

The first control wiring CL1 that sends a control signal to the switch SW extends linearly from the shift registers SR1 to SRn to the corresponding switch SW. Each first control wiring CL1 is inclined in a direction parallel to the short side of the second substrate SUB2, that is, with respect to the second control wiring CL2b by an angle θ, for example, 30 to 90 degrees. A part of each first control wiring CL1 extends across the second control wiring CL2b. At this time, the first control wiring CL1 has an inclination angle of an angle θ and extends so as to intersect with or overlap the second control wiring CL2. As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes substantially uniform, and the generation of noise in the touch detection region and the deterioration of the touch detection performance can be suppressed. can.

9B is a cross-sectional view schematically showing a cross section of the control wiring along the line DD of FIG. 9A. In the wiring structure described above, a second control wiring CL2 that overlaps with the first control wiring CL1 and a second control wiring CL2 that does not overlap with the first control wiring CL1 are generated depending on the intersecting portions. For example, in the cross section shown in FIG. 9B, two second control wiring CL2 (Rx4, Rx6) overlap with the first control wiring CL1, and one second control wiring CL2 (Rx2) overlaps with the first control wiring CL1. It doesn't become. In this case, a coupling occurs between the two overlapping second control wiring CL2 (Rx4, Rx6) and the two first control wiring CL1. Further, as shown by the two-dot chain arrow in FIG. 9B, coupling may occur between the non-overlapping second control wiring CL2 (Rx2) and the adjacent first control wiring CL1. In order to prevent such coupling between the second control wiring CL2 (Rx2) and the first control wiring CL1 that do not overlap with each other, according to the present embodiment, the first control wiring CL1 is configured 3 Among the wirings of the book, the wiring R3 (VCOMSEL) having a fixed potential is arranged so as to be closest to the second control wiring CL2 (Rx2) which does not overlap. The wiring R3 is arranged at a boundary portion between a region that overlaps with the second control wiring CL2b and a region that does not overlap. That is, the three wirings R1, R2, and R3 constituting the first control wiring CL1 are arranged in the order of R3, R2, and R1 from the non-overlapping second control wiring CL2 (Rx2) side.
By arranging the first control wiring CL1 in the above arrangement, it is possible to suppress the generation of unnecessary coupling, and more effectively suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. The order of the wirings R2 and R1 may be any.

(Third modification example)
FIG. 10A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the third modification. According to the third modification, at least one of the first control wiring CL1 and the second control wiring CL2b overlaps at the overlapping position with an inclination angle with respect to the other control wiring, that is, so as to intersect diagonally. Is extending.
As shown in FIG. 10A, in the third modification, the plurality of second control wiring CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are hidden regions on the short side side of the second substrate SUB2. In the ED, the switch SW and the Tx scanner (shift register SR) 32 extend in a direction parallel to the short side of the second substrate SUB2. Further, at least a part of each second control wiring CL2, and in this modification, all of each second control wiring CL2 is formed to have continuous unevenness such as wavy, sine wavy, and serrated. Each part of the second control wiring CL2 is inclined, for example, by 30 to 90 degrees with respect to the direction parallel to the short side of the second substrate SUB2.

Each first control wiring CL1 is provided so as to be bent in a step shape. That is, each first control wiring CL1 extends from the Tx scanner 32 in a direction orthogonal to the short side of the second substrate SUB2, then bends at a right angle, extends parallel to the short side of the second substrate SUB2, and further. It bends at a right angle and extends to the switch SW. A part of the first control wiring CL1 extends so as to intersect the inclined portion 64 of the second control wiring CL2b. At this time, since each of the second control wiring CL2 is formed in a wavy shape, the first control wiring CL1 and the second control wiring CL2 have an inclination angle of θ to 90 degrees at all the overlapping portions. It crosses and extends. As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes substantially uniform, and the generation of noise in the touch detection region and the deterioration of the touch detection performance can be suppressed. can.

FIG. 10B is a cross-sectional view schematically showing a cross section of the control wiring along the line EE of FIG. 10A. In the wiring structure described above, a second control wiring CL2 that overlaps with the first control wiring CL1 and a second control wiring CL2 that does not overlap with the first control wiring CL1 are generated depending on the intersecting portions. For example, in the cross section shown in FIG. 10B, two second control wiring CL2 (Rx4, Rx6) overlap with the first control wiring CL1, and one second control wiring CL2 (Rx2) overlaps with the first control wiring CL1. It doesn't become. In this case, a coupling occurs between the two overlapping second control wiring CL2 (Rx4, Rx6) and the two first control wiring CL1. Further, as shown by the arrow of the two-dot chain line in FIG. 10B, there is a possibility that coupling may occur between the second control wiring CL2 (Rx2) that does not overlap and the first control wiring CL1 that is adjacent to the second control wiring CL2 (Rx2). In order to prevent such coupling between the second control wiring CL2 (Rx2) and the first control wiring CL1 that do not overlap with each other, according to the present embodiment, the first control wiring CL1 is configured 3 Among the wirings of the book, the wiring R3 (VCOMSEL) having a fixed potential is arranged so as to be closest to the second control wiring CL2 (Rx2) which does not overlap. The wiring R3 is arranged at a boundary portion between a region that overlaps with the second control wiring CL2b and a region that does not overlap. That is, the three wirings R1, R2, and R3 constituting the first control wiring CL1 are arranged in the order of R3, R2, and R1 from the non-overlapping second control wiring CL2 (Rx2) side.
By arranging the first control wiring CL1 in the above arrangement, it is possible to suppress the generation of unnecessary coupling, and more effectively suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. The order of the wirings R2 and R1 may be any.

(Fourth modification)
FIG. 11A is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the fourth modification. According to the fourth modification, the plurality of second control wiring CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are switched SW in the non-display area ED on the short side of the second substrate SUB2. And the Tx scanner (shift register SR) 32 extend in a direction parallel to the short side of the second substrate SUB2.
The first control wiring CL1 that sends a control signal to the switch SW extends in one direction from the shift registers SR1 to SRn to the corresponding switch SW. Each first control wiring CL1 is inclined in a direction parallel to the short side of the second substrate SUB2, that is, with respect to the second control wiring CL2b by an angle θ, for example, 30 to 90 degrees. Further, at least a part of each first control wiring CL1 and, in this modification, all of each first control wiring CL1 are formed to have continuous irregularities such as wavy, sine wavy, and serrated in the plane direction. There is.

A part of each first control wiring CL1 extends across the second control wiring CL2b. At this time, the first control wiring CL1 has an inclination angle of θ to 90 degrees and extends so as to intersect with or overlap the second control wiring CL2. Further, since each first control wiring CL1 is formed in a wavy shape, most of the overlapping portions intersect with the second control wiring CL2 in a direction substantially orthogonal to each other.
As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be further reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes substantially uniform, and the generation of noise in the touch detection region and the deterioration of the touch detection performance can be suppressed. can.

FIG. 11B is a cross-sectional view schematically showing a cross section of the control wiring along the line FF of FIG. 11A. In the wiring structure described above, a second control wiring CL2 that overlaps with the first control wiring CL1 and a second control wiring CL2 that does not overlap with the first control wiring CL1 are generated depending on the intersecting portions. For example, in the cross section shown in FIG. 11B, two second control wiring CL2 (Rx4, Rx6) overlap with the first control wiring CL1, and one second control wiring CL2 (Rx2) overlaps with the first control wiring CL1. It doesn't become. In this case, a coupling occurs between the two overlapping second control wiring CL2 (Rx4, Rx6) and the two first control wiring CL1. Further, as shown by the two-dot chain arrow in FIG. 11B, coupling may occur between the non-overlapping second control wiring CL2 (Rx2) and the adjacent first control wiring CL1. In order to prevent such coupling between the second control wiring CL2 (Rx2) and the first control wiring CL1 that do not overlap with each other, according to the present embodiment, the first control wiring CL1 is configured 3 Among the wirings of the book, the wiring R3 (VCOMSEL) having a fixed potential is arranged so as to be closest to the second control wiring CL2 (Rx2) which does not overlap. The wiring R3 is arranged at a boundary portion between a region that overlaps with the second control wiring CL2b and a region that does not overlap. That is, the three wirings R1, R2, and R3 constituting the first control wiring CL1 are arranged in the order of R3, R2, and R1 from the non-overlapping second control wiring CL2 (Rx2) side.
By arranging the first control wiring CL1 in the above arrangement, it is possible to suppress the generation of unnecessary coupling, and more effectively suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. The order of the wirings R2 and R1 may be any.

(Fifth modification)
FIG. 12 is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the fifth modification. According to the fifth modification, the switch SW of the Tx drive circuit is provided adjacent to the shift registers SR1 to SRn of the Tx scanner 32, respectively, and is separated from one end of the first detection electrode Tx.
The plurality of second control wirings CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are one end of the first detection electrode Tx and the switch SW in the non-display area ED on the short side of the second substrate SUB2. It extends in a direction parallel to the short side of the second substrate SUB2.

The first control wiring CL1 that sends a control signal from the switch SW to the first detection electrode Tx is formed in a stripe shape and extends linearly from the switch SW to one end of the corresponding first detection electrode Tx. According to this modification, the width (wiring thickness) of each first control wiring CL1 is formed to be substantially equal to the width of the first detection electrode Tx or substantially equal to the width of the second control wiring CL2b. Further, each first control wiring CL1 is inclined at an angle θ, for example, 30 to 90 degrees, with respect to the direction parallel to the short side of the second substrate SUB2, that is, with respect to the second control wiring CL2b. .. Each first control wiring CL1 extends across a plurality of second control wiring CL2b. At this time, the first control wiring CL1 has an inclination angle of an angle θ and extends so as to intersect with or overlap the second control wiring CL2. As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes uniform, and it is possible to suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance.

(6th modification)
13 is a plan view schematically showing the arrangement structure of the first control wiring and the second control wiring of the display device and the touch detection device according to the sixth modification, and FIG. 14 is taken along the line GG of FIG. It is sectional drawing of the display device. According to the sixth modification, the display device further includes two power supply wirings that function as the first control wiring. That is, the display device has a first power supply wiring P1 (VCOMSEL) provided on the first substrate SUB1 and a second power supply wiring P2 (xVCOMSEL) of opposite phase. The first power supply wiring P1 and the second power supply wiring P2 extend outside the Tx scanner 32 along the side edge of the second substrate SUB2. The first power supply wiring P1 and the second power supply wiring P2 are connected to each shift register SR of the Tx scanner 32.
The plurality of second control wirings CL2b connected to the even-numbered second detection electrodes Rx2 to Rxn-1 are the switch SW and the Tx scanner (shift register SR) in the non-display area ED on the short side of the second board SUB2. It is arranged between 32 and substantially parallel to the short side of the second substrate SUB2. The plurality of first control wiring CL1s are provided so as to be bent in a step shape. That is, each first control wiring CL1 extends from the shift register SR in a direction orthogonal to the short side of the second board SUB2, then bends at a right angle, extends parallel to the short side of the second board SUB2, and further. It bends at a right angle and extends to the switch SW. A part of the first control wiring CL1 extends so as to intersect the inclined portion 64 of the second control wiring CL2b.
Further, according to this modification, a mesh-shaped ground layer 60 is formed on the peripheral edge of the second substrate SUB2 on the outside of the second control wiring CL2. The ground layer 60 is provided so as to overlap the Tx scanner 32, the first and second power supply wirings P1 and P2 on the first substrate SUB1. The ground layer 60 suppresses the occurrence of coupling between the Tx scanner 32, the first and second power supply wirings P1, P2, and the second control wiring CL2.

(Second embodiment)
FIG. 15 is a plan view schematically showing the touch detection device of the display device according to the second embodiment, and FIG. 16 is a plan view schematically showing an example of the arrangement structure of the control wiring and the power supply wiring.
According to the second embodiment, the touch sensor (touch detection device) 16 is configured to input a drive signal from both ends in the longitudinal direction of each first detection electrode Tx. As shown in FIG. 15, the touch sensor 16 includes a plurality of first detection electrodes Tx1 to Txn provided on the first substrate SUB1 and a plurality of second plates provided on the upper surface of the second substrate SUB2 which is an insulating layer. The detection electrodes Rx1 to Rxn are provided. The first detection electrodes Tx1 to Txn are formed in a striped shape and extend along the longitudinal direction (first direction X) of the first substrate SUB1. Further, the first detection electrodes Tx1 to Txn are arranged in parallel with each other at a predetermined interval in the width direction (second direction Y) orthogonal to the longitudinal direction. The first detection electrodes Tx1 to Txn are provided so as to face almost the entire surface of the display region (touch detection region) DA.
The second detection electrodes Rx1 to Rxn are formed in a striped shape, respectively, in the width direction (second direction Y) of the second substrate SUB2, that is, in a direction orthogonal to or intersecting the extending direction of the first detection electrodes Tx1 to Txn. It is extended. The second detection electrodes Rx1 to Rxn are arranged in parallel with each other at predetermined intervals in the longitudinal direction of the second substrate SUB2. The second detection electrodes Rx1 to Rxn are provided so as to face almost the entire surface of the display region DA. As a result, the second detection electrodes Rx1 to Rx are arranged so as to intersect the first detection electrodes Tx1 to Txn in the display region DA, and the intersecting portion is the first detection electrode with the second substrate SUB2 interposed therebetween. It faces Tx1 to Txn.

In the second embodiment, the Tx scanner 32 having a plurality of shift register SRs is provided on the first substrate SUB1 on one end side and the other end side in the longitudinal direction. Further, switch SWs are provided adjacent to both ends of each first detection electrode Tx in the longitudinal direction, and are connected to the first detection electrode Tx, respectively. Each shift register SR of the Tx scanner 32 is connected to the corresponding switch SW by the first control wiring CL1.
The plurality of second control wiring CL2 extends from one end in the longitudinal direction of the second detection electrodes Rx1 to Rxn, and is connected to the second FPC 22 through the non-display area ED of the display panel 12. In the present embodiment, with respect to the odd-numbered rows of the second detection electrodes Rx1, Rx3, and Rxn-1, the second control wiring CL2b is the upper end of the second detection electrode Rx when the Y direction is the vertical direction in FIG. It extends from one end in the Y direction), passes through the non-display region ED on the long side of the second substrate SUB2, and further extends to the second FPC22 through the non-display region ED on the short side of the second substrate SUB2. .. For the second detection electrodes Rx2, Rx4, and Rxn in an even-numbered row, the second control wiring CL2a extends from the lower end (the other end in the Y direction) of the second detection electrode Rx and extends from the long side of the second substrate SUB2. It passes through the non-display area ED and extends to the second FPC 22.
The second FPC 22 is joined to a position near the lower end of the short side of the short side of the second substrate SUB2 so as to be offset to one end side, that is, when the Y direction is the vertical direction in FIG. Therefore, the second control wiring CL2b connected to the second detection electrodes Rx1 and Rx3 to Rxn-1 in the odd-numbered row covers almost the entire length of the short side in the non-display region ED on the short side of the second substrate SUB2. It is postponed.

The first control wiring CL1 and the second control wiring CL2b are arranged in the same manner as in the first embodiment described above at the short side end portion located on the drive IC chip 14 side of the second substrate SUB2. That is, the plurality of second control wiring CL2b connected to the second detection electrodes Rx1 and Rx3 to Rxn-1 in the odd-numbered row are the switch SW and the Tx scanner (in the non-display area ED on the short side of the second board SUB2). The shift register SR) 32 is arranged in a direction substantially parallel to the short side of the second substrate SUB2.
The first control wiring CL1 that sends a control signal to the switch SW extends from the shift register SR of the Tx scanner 32 to the corresponding switch SW. Each first control wiring CL1 is provided, for example, bent in a staircase shape. That is, each first control wiring CL1 extends from the shift register SR in a direction orthogonal to the second control wiring CL2b, then bends at a right angle, extends in parallel with the second control wiring CL2b, and further bends at a right angle. , Extends to the switch SW in a direction orthogonal to or intersecting the second control wiring CL2. As a result, a part of the first control wiring CL1 is positioned so as to be orthogonal to the second control wiring CL2b, and a part of the first control wiring CL1 is overlapped and extends in parallel with the second control wiring CL2b. Further, the width of each first control wiring CL1 is narrower than the width of the first detection electrode Tx, and further narrower than the width W2 of the second control wiring CL2. In the embodiment, the width of the first control wiring CL1 is formed to be 1/2 or less, more preferably 1/5 or less of the width of the second control wiring CL2.

According to the second embodiment, the first power supply wiring (VCOMSEL) P1 and the second power supply wiring (xVCOMSEL) P2 are provided in the non-display area of the first substrate SUB1, that is, the peripheral edge portion, and cover the entire circumference. It is postponed. The first and second power supply wirings P1 and P2 that function as the first control wiring extend along a pair of long sides and a pair of short sides of the first substrate SUB1. The first and second power supply wirings 1 and P2 are electrically connected to the pair of Tx scanners 32 and the drive IC chip 14.
As shown in FIGS. 15 and 16, of the first and second power supply wirings P1 and P2, the long side wiring portion extending along the pair of long sides of the first substrate SUB1 is parallel to the long sides. It extends at an angle θ2 (for example, 5 to 90 degrees) with respect to the above direction. In the present embodiment, the long side wiring portions of the first and second power supply wirings P1 and P2 are bent at the central portion. That is, the long side wiring portions of the first and second power supply wirings P1 and P2 extend from one end of the long side of the first substrate SUB1 to substantially the center portion at an angle θ2 toward the second detection electrode Rx side. From this central portion to the other end of the long side, it extends outward at an angle θ2. As a result, the long side wiring portions of the first and second power supply wirings P1 and P2 do not extend in parallel with the second control wirings CL2a and CL2b, but intersect with the second control wirings CL2a and CL2b in an inclined state. And duplicates.

A mesh-shaped ground layer 60 is formed on the peripheral edge of the second substrate SUB2 on the outside of the second control wiring CL2. The ground layer 60 is provided so as to be superimposed on one Tx scanner 32 (for example, the Tx scanner 32 provided on the drive IC chip 14 side) on the first substrate SUB1 and the first and second power supply wirings P1 and P2. There is. The ground layer 60 suppresses the occurrence of coupling between the Tx scanner 32, the first and second power supply wirings P1, P2, and the second control wiring CL2.

According to the touch detection device and the display device according to the present embodiment configured as described above, a part of the first control wiring CL1 connected to the first detection electrodes Tx1 to Txn for touch detection is the second. It is provided so as to overlap or intersect the control wiring CL2b. These overlapping portions overlap with the second control wiring CL2b at an angle different from parallel, and the region overlapping in parallel with the second control wiring CL2b is greatly reduced. At the same time, since the first control wiring CL1 is formed in a narrow width W1 (1/2 or less, preferably 1/5 or less of W2) as compared with the second control wiring CL2b width W2, the first control wiring It is possible to significantly reduce the area (overlapping area) of the portion where CL1 and the second control wiring CL2b overlap. As a result, the coupling capacity formed in the overlapping portion of the first control wiring CL1 and the second control wiring CL2b can be significantly reduced.

Further, the long side wiring portions of the first and second power supply wirings P1 and P2 that function as control wiring have an inclination angle of an angle θ2 and intersect with or overlap with the second control wiring CL2a and CL2b and extend. There is. As a result, the first and second power supply wirings P1 and P2 do not overlap in parallel with the second control wirings CL2a and CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the power supply wiring and the plurality of second control wiring CL2 becomes uniform, and it is possible to suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance.
From the above, also in the second embodiment, the generation of noise in the touch detection region due to the coupling capacitance and the deterioration of the touch detection performance are suppressed, and stable touch detection is realized over the entire touch detection region. It is possible to obtain a possible touch detection device and a display device including the same.
The number, shape, and forming material of the first detection electrode and the second detection electrode can be appropriately changed without being limited to the first embodiment described above. The first detection electrode of the touch detection device is not limited to the case where it is provided on the first substrate SUB1 of the display panel 12, and the first detection electrode, the insulating layer, and the second detection are superposed on the display surface of the second substrate SUB2. The electrode may be laminated. Further, the wiring structure and the laminated structure of the first control wiring CL1 and the second control wiring CL2b are not limited to the second embodiment, and any of the above-mentioned first to sixth modifications can be applied. It is possible.

(7th modification)
FIG. 17 schematically shows a wiring structure according to a seventh modification. In the second embodiment described above, the shape of the end portion of the second control wiring CL2a and CL2b connected to the second detection electrode Rx is not limited to a rectangular shape, and as shown in FIG. 17, a plurality of steps are formed. May be. By adopting such a step shape, the crossing angle between the end portions of the second control wirings CL2a and CL2b and the first and second power supply wirings P1 and P2 can be made larger and closer to 90 degrees. This makes it possible to reduce the area of the portion where the second control wirings CL2a and CL2b overlap with the first and second power supply wirings P1 and P2, and further reduce the coupling capacity.

(8th modification)
FIG. 18 schematically shows a wiring structure according to an eighth modification. In the second embodiment described above, the first and second power supply wirings P1 and P2 are configured to overlap a part of the second control wirings CL2a and CL2b, but the configuration is not limited to this, and as shown in FIG. The first and second power supply wirings P1 and P2 may be arranged apart from the second control wirings CL2a and CL2b without overlapping the second control wirings CL2a and CL2b. In this case, the first and second power supply wirings P1 and P2 are provided apart from the second control wirings CL2a and CL2b by a distance d at which coupling does not occur.

(Third embodiment)
FIG. 19 is a cross-sectional view of a display device including the touch detection device according to the third embodiment, and FIG. 20 is a plan view schematically showing the touch detection device.
According to the second embodiment, the touch detection device (touch sensor) 16 is configured as an independent touch panel and is provided on the display surface of the display panel 12.
More specifically, the touch detection device 16 includes, for example, a first insulating layer IF1 made of a transparent synthetic resin, and a plurality of first detection electrodes TX1 to Txn provided on the first insulating layer IF1. It has a second insulating layer IF2 made of a transparent synthetic resin, and a plurality of second detection electrodes Rx1 to Rxn provided on the second insulating layer IF2. The second insulating layer IF2 is laminated on the first detection electrodes Tx1 to Txn and the first insulating layer IF1. As a result, the first detection electrodes Tx1 to Txn face the second detection electrodes Rx1 to Rxn with the second insulating layer IF2 interposed therebetween.

The display panel 12 includes a first substrate SUB1, a second substrate SUB2 arranged to face each other with a gap between the first substrate SUB1, and a liquid crystal layer LQ arranged between the first substrate and the second substrate. have. The first insulating layer IF1 of the touch detection device 16 is attached to the display surface of the display panel 12 by the transparent adhesive layer AD2. Further, in the present embodiment, the transparent cover panel 62 is attached on the touch detection device 16 by the transparent adhesive layer AD1.

As shown in FIG. 20, the first detection electrodes Tx1 to Txn are formed in a striped shape and are arranged along the longitudinal direction (first direction X) of the first insulating layer IF1. Further, the first detection electrodes Tx1 to Txn are arranged in parallel with each other at a predetermined interval in the width direction (second direction Y) orthogonal to the longitudinal direction. The first detection electrodes Tx1 to Txn are provided so as to face almost the entire surface of the display region (touch detection region) DA.
The second detection electrodes Rx1 to Rxn are formed in a striped shape and extend in the width direction (second direction Y) of the second substrate SUB2, that is, in a direction orthogonal to the extending direction of the first detection electrodes Tx1 to Txn. There is. The second detection electrodes Rx1 to Rxn are arranged in parallel with each other at predetermined intervals in the longitudinal direction of the second substrate SUB2. The second detection electrodes Rx1 to Rxn are provided so as to face almost the entire surface of the display region DA. As a result, the second detection electrodes Rx1 to Rx are arranged so as to intersect the first detection electrodes Tx1 to Txn in the display region DA, and further, the first detection electrodes Tx1 to Txn sandwich the second insulating layer IF2. It is placed on top of each other.

A plurality of first control wiring CL1s are provided on the non-display region ED of the first insulating layer IF1. The plurality of first control wiring CL1s are connected to one end in the longitudinal direction of the first detection electrodes Tx1 to Txn, extend from these first detection electrodes in the first direction X, and then bend at a substantially right angle to the second direction. It extends to Y (along the short side of the first insulating layer IF1). The first control wiring CL1 is connected to a drive IC chip (not shown). The other plurality of first control wiring CL1s are connected to the other ends in the longitudinal direction of the first detection electrodes Tx1 to Txn, extend from these first detection electrodes in the first direction X, and then bend at a substantially right angle. , 2nd direction Y (along the other short side of the 1st insulating layer IF1). These other first control wiring CL1s are connected to a drive IC chip (not shown). A Tx drive signal (TPH, TPL) is supplied from the drive IC chip to the first detection electrodes Tx1 to Txn via the first control wiring CL1.

A plurality of second control wirings CL2 are provided on the non-display area ED of the second insulating layer IF2. The plurality of second control wiring CL2 extends in the second direction Y from one end in the longitudinal direction of the second detection electrodes Rx1 to Rxn, then bends in the first direction X (to the right in the figure), and further, the second It bends in the direction Y and extends along one short side of the second insulating layer IF2. The other plurality of second control wirings CL2 extend in the second direction Y from one end in the longitudinal direction of the second detection electrodes Rx1 to Rxn, then bend in the first direction X (leftward in the figure), and further. It bends in the second direction Y and extends along the other short side of the second insulating layer IF2. These plurality of second control wirings CL2 are connected to a touch drive IC chip for touch detection (not shown). As a result, the detection signals detected by the second detection electrodes Rx1 to Rxn are sent to the touch drive IC chip via the second control wiring CL2.

At least one of the first control wiring CL1 and the second control wiring CL2b extends at the overlapping position so as to have an inclination angle with respect to the other control wiring, that is, so as to intersect diagonally.
According to the present embodiment, at the pair of short side end portions of the first insulating layer IF1, the first control wiring CL1 is substantially parallel to the short side of the first insulating layer IF1, that is, in the second direction Y. , Is extending. On the other hand, the plurality of second control wiring CL2 has only an angle θ2 (for example, 5 to 90 degrees) with respect to the direction parallel to the short side at the pair of short side end portions of the second insulating layer IF2. It is inclined and extends. In the present embodiment, the second control wiring CL2 is bent at the central portion. That is, the second control wiring CL2 has an angle θ2 toward the second detection electrode Rx with respect to the direction parallel to the short side of the second insulating layer IF2 from one end of the short side of the second insulating layer IF2 to substantially the center. It extends from the central portion to the other end of the short side by tilting only by an angle −θ2 with respect to the direction parallel to the short side of the second insulating layer IF2. As a result, at the pair of short side end portions of the first and second insulating layers IF1 and IF2, the plurality of second control wiring CL2 does not extend in parallel with the first control wiring CL1 but becomes the first control wiring CL1. On the other hand, it intersects and overlaps in an inclined state.

According to the touch detection device and the display device according to the third embodiment configured as described above, at least one of the first control wiring CL1 and the second control wiring CL2b is in the overlapping position with respect to the other control wiring. It has an inclination angle, that is, it extends so as to intersect diagonally. As a result, the first control wiring CL1 and the second control wiring CL2 do not overlap in parallel, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes uniform, and it is possible to suppress the generation of noise in the touch detection region and the deterioration of the touch detection performance. From the above, also in the third embodiment, the generation of noise in the touch detection region due to the coupling capacitance and the deterioration of the touch detection performance are suppressed, and stable touch detection is realized over the entire touch detection region. It is possible to obtain a possible touch detection device and a display device including the same.
The number, shape, and forming material of the first detection electrode and the second detection electrode can be appropriately changed without being limited to the first embodiment described above. The wiring structure and the laminated structure of the first control wiring CL1 and the second control wiring CL2b are not limited to the second embodiment, and any of the above-mentioned first to sixth modifications can be applied. be. Further, the display panel is not limited to the liquid crystal display panel, and an organic EL display panel can be applied.

(9th modification)
FIG. 21 schematically shows a wiring structure according to a ninth modification. In the second embodiment described above, in the region where the first control wiring CL1 and the second control wiring CL2 overlap, one of the wirings, for example, the second control wiring CL2 is continuously connected in a wavy shape, a sine wave shape, a sawtooth shape, or the like. It is formed into a formation having irregularities. In this way, by forming each second control wiring CL2 in a wavy shape, for example, the second control wiring CL2 has an inclination angle of 30 to 90 degrees at all overlapping portions with the first control wiring CL1. Therefore, it extends so as to intersect with the first control wiring CL1. As a result, the first control wiring CL1 does not overlap in parallel with the second control wiring CL2b, and the area of the overlapping portion can be significantly reduced. At the same time, the overlapping area of the plurality of overlapping portions of the first control wiring CL1 and the plurality of second control wiring CL2 becomes substantially uniform, and the generation of noise in the touch detection region and the deterioration of the touch detection performance can be suppressed. can.

Although some embodiments and modifications of the present invention have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. The novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments and variations thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

All configurations that can be implemented by those skilled in the art with appropriate design changes based on the embodiments described above as embodiments and modifications of the present invention also belong to the scope of the present invention as long as the gist of the present invention is included.
Further, it is naturally understood that the other functions and effects brought about by the above-described embodiments are apparent from the description of the present specification, or those which can be appropriately conceived by those skilled in the art are brought about by the present invention.

10 ... Display device, 12 ... Display panel, 14, 18 ... Drive IC chip,
16 ... Touch sensor (touch detection device), 20 ... 1st FPC, 22 ... 2nd FPC,
30 ... Touch drive circuit, 32 ... Tx scanner (shift register),
SUB1 ... Array substrate, SUB2 ... Opposite substrate, Tx ... First detection electrode,
Rx ... 2nd detection electrode, CL1 ... 1st control wiring, CL2 ... 2nd control wiring,
SW ... Switch, P1 ... 1st power supply wiring, P2 ... 2nd power supply wiring

Claims (9)

With the first board
A second substrate facing the first region of the first substrate and not facing the second region of the first substrate.
Equipped with
With a plurality of pixels arranged in the first region,
A plurality of detection electrodes arranged in the first region, and
The drive circuit arranged in the second region and
A plurality of first wirings arranged in the second region and extending in parallel with the length direction of the drive circuit,
A plurality of second wirings connecting the drive circuit and the plurality of detection electrodes, and
It has an insulating layer located between the plurality of first wirings and the plurality of second wirings.
The plurality of second wirings are display devices that intersect with the plurality of first wirings at an angle other than 90 degrees in a plan view. A part of the plurality of second wirings extends from the drive circuit in the first direction and in a direction inclined with respect to the first wiring, and the other part of the plurality of second wirings is described above. The display device according to claim 1, wherein the display device extends from the drive circuit in a second direction opposite to the first direction and in a direction inclined with respect to the first wiring. The display according to claim 1, wherein the plurality of second wirings are respectively connected to the detection electrode via a switch, and the switch is arranged between the plurality of first wirings and the drive circuit. Device. The display device according to claim 1, wherein the plurality of second wirings are each bent and extended in a stepped manner. The display device according to claim 1, wherein the plurality of first wirings are each formed in a wavy shape. The display device according to claim 1, wherein the plurality of second wirings are each formed in a wavy shape. A display panel including a first substrate having a display area including a plurality of pixels and a non-display area, and
The touch detection device provided on the display panel is provided.
The touch detection device is
A plurality of first detection electrodes provided so as to overlap the display area, and
A plurality of second detection electrodes, which are provided so as to overlap the display area and intersect with the first detection electrode via an insulating layer,
A plurality of first control wirings connected to the first detection electrode and provided in the non-display area, respectively, and
Each includes a plurality of second control wirings connected to the second detection electrode and provided in the non-display area.
The first control wiring is a display device connected to the first detection electrode via a switch including a plurality of switching elements. The display device according to claim 7, wherein the plurality of first control wirings and the plurality of second control wirings are arranged so as to overlap each other in a plan view. The display device according to claim 7, wherein the line width of the first control wiring is formed to be narrower than the width of the first detection electrode and the line width of the second control wiring.

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