Display device with touch detection function

Abstract

A display device with a touch detection function comprises: a display portion, configured with a first data line and a second data line; a first area outside the display portion and a second area sandwiching the display portion and opposite to the first area; a sensor portion overlapping the display portion and including a sensor electrode; a first data signal supply line connected to the first data line and configured in the first area; a second data signal supply line connected to the second data line and configured in the second area; a dummy wiring configured in the first area and not connected to the sensor electrode; and a sensor wiring configured in the second area and connected to the sensor electrode, the dummy wiring overlapping a portion of the first data signal supply line via an insulating layer, the sensor wiring overlapping a portion of the second data signal supply line via the insulating layer, and the line length of the dummy wiring in the first area being substantially the same as the line length of the sensor wiring in the second area.

Description

Technical Field

[0001] One embodiment of the present invention relates to a display device with a touch detection function. Background Art

[0002] In recent years, display devices with touch sensors (display devices with touch detection functions) have been installed in various electronic devices (Patent Document 1 or Patent Document 2). Display devices with touch detection functions, for example, have a plurality of pixels and sensor electrodes arranged in a screen (display portion), a plurality of circuits arranged in a peripheral area (frame area) surrounding the display area and driving these plurality of pixels, a driver IC, and a flexible substrate. The flexible substrate is electrically connected to, for example, a plurality of wirings running in the peripheral area, and these wirings connect the plurality of circuits to each other and to the driver IC. The display device with touch detection function can display images on the screen, and can operate input buttons and icons displayed on the screen using sensor signals input to the sensor electrodes through a detected object (such as a user's own finger, a touch pen, etc.).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: U.S. Patent No. 9,046,954

[0006] Patent Document 2: U.S. Patent No. 9,098,134 Summary of the Invention

[0007] Technical problem to be solved by the invention

[0008] In the display device with touch detection function as described above, the wiring group running in the peripheral area becomes a wiring group arranged basically symmetrically left and right or symmetrically up and down with respect to the screen. With the demand for narrower borders and the multifunctionality of specific electrodes, specific wiring is sometimes arranged only on one side relative to the screen. In that case, the capacitance balance between the wiring on one side and the other side of the screen collapses, which becomes a hidden danger of causing defects in the displayed image.

[0009] In one embodiment of the present invention, one of the objects is to provide a display device with a touch detection function that suppresses defects in an image displayed on a screen in response to the arrangement of multiple wirings running above and below or left and right relative to a screen.

[0010] Technical solutions to solve problems

[0011] A display device with a touch detection function according to one embodiment of the present invention includes: a display portion, which is provided with a first data line and a second data line; a first area outside the display portion, and a second area on the opposite side of the first area across the display portion; a sensor portion overlapping the display portion and including a sensor electrode; a first data signal supply line electrically connected to the first data line and arranged in the first area; a second data signal supply line electrically connected to the second data line and arranged in the second area; a dummy wiring arranged in the first area and not connected to the sensor electrode; and a sensor wiring arranged in the second area and connected to the sensor electrode, the dummy wiring overlapping with at least a portion of the first data signal supply line via an insulating layer, the sensor wiring overlapping with at least a portion of the second data signal supply line via the insulating layer, and the line length of the dummy wiring in the first area being substantially the same as the line length of the sensor wiring in the second area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a plan view showing the structure of a display device with a touch detection function according to one embodiment of the present invention.

[0013] Figure 2 It is a plan view showing the structure of a display device with a touch detection function according to one embodiment of the present invention.

[0014] Figure 3 (A) and (B) are diagrams for explaining a signal state of a certain data line in an embodiment having a different structure from the display device with a touch detection function according to one embodiment of the present invention.

[0015] Figure 4 (A) and (B) are diagrams for explaining a signal state of a certain data line in the display device with a touch detection function according to one embodiment of the present invention.

[0016] Figure 5 It is a plan view showing the structure of wiring arrangements of a display device with a touch detection function according to one embodiment of the present invention.

[0017] Figure 6 It is a plan view showing the structure of wiring arrangements of a display device with a touch detection function according to one embodiment of the present invention.

[0018] Figure 7 This is an end cross-sectional view showing the structure of a display device with a touch detection function according to one embodiment of the present invention.

[0019] Figure 8This is an end cross-sectional view showing the structure of a display device with a touch detection function according to one embodiment of the present invention.

[0020] Figure 9 It is a plan view showing the structure of a display device with a touch detection function according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following describes various embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in various ways without departing from its scope, and should not be construed as limiting the description of the following exemplary embodiments. Furthermore, in the accompanying drawings, the width, thickness, shape, etc. of various parts may be schematically shown in comparison with the actual form for the purpose of more clarification. These schematic drawings are merely examples and do not limit the interpretation of the present invention.

[0022] In the present invention, when a single film is processed to form multiple films, these multiple films may have different functions and effects. However, these multiple films are derived from films formed into the same layer in the same process, have the same layer structure, and are made of the same materials. Therefore, these multiple films are defined as existing in the same layer.

[0023] In the various embodiments of the present invention, expressions such as "upper" and "lower" when describing the accompanying drawings indicate the relative positional relationship between the structure of interest and other structures. In the various embodiments of the present invention, the direction from the insulating surface described later toward the protrusion when viewed from the side is defined as "upper", and the opposite direction is defined as "lower". In the various embodiments of the present invention, when describing a state in which another structure is arranged on top of a certain structure, when simply expressed as "above", unless otherwise specified, the following two situations are included: a situation in which the other structure is arranged directly above the certain structure in a manner of contacting the certain structure; and a situation in which the other structure is arranged above the certain structure with the other structure in between.

[0024] Furthermore, in the various embodiments of the present invention, expressions such as "α includes A, B, or C," "α includes any one of A, B, and C," and "α includes one selected from the group consisting of A, B, and C" do not exclude the case where α includes multiple combinations of A to C, unless otherwise specified. Furthermore, these expressions do not exclude the case where α includes other elements.

[0025] In addition, in each embodiment of the present invention, the same reference numerals are used to identify the elements described in the previous figures (or, reference numerals such as A, B, a, and b are added after the numbers), and detailed descriptions are sometimes omitted as appropriate. In addition, the words "first" and "second" attached to each element are convenient identifiers used to distinguish the elements, and unless otherwise specified, they do not have any other meanings. Furthermore, in each embodiment of the present invention, wirings labeled with the same reference numerals may sometimes refer to a single wiring, and may sometimes collectively represent multiple wirings.

[0026] <First embodiment>

[0027] In this embodiment, an example of a touch-sensitive display device 10 that is a so-called built-in touchscreen type is described. Furthermore, as described in the following embodiments, the touch-sensitive display device 10 can detect not only a state in which a detected object is in direct contact with the touch-sensitive display device 10, but also a state in which a detected object is brought into proximity with the touch-sensitive display device 10. Specifically, the touch-sensitive display device 10 includes one or both of the following functions: a function for inputting commands or information by causing the detected object to touch the touch-sensitive display device 10, and a function for inputting commands or information by causing the detected object to approach the touch-sensitive display device 10. In this embodiment, viewing the touch-sensitive display device 10 from a direction perpendicular to the insulating surface, the screen (display unit 104), or the sensor electrodes 128 is referred to as "top view." Viewing the touch-sensitive display device 10 from a plane or curved surface intersecting the insulating surface and viewing the cut surface parallel to the screen is referred to as "cross-sectional view." Furthermore, in this embodiment, for example, an axis (major axis) parallel or substantially parallel to the third side 102C or the fourth side 102D is defined as the first axis D1, and an axis (minor axis) intersecting the first axis D1 and parallel or substantially parallel to the first side 102A or the second side 102B is defined as the second axis D2. Furthermore, an axis intersecting the first axis D1 and the second axis D2 and perpendicular or substantially perpendicular to the plane (D1-D2 plane) including the first axis D1 and the second axis D2 is defined as the third axis D3.

[0028] <1-1. Structure of the Display Device 10 with Touch Detection Function>

[0029] Figure 1 and Figure 2 10 is a top view showing the structure of the display device with a touch detection function 10. The structure of the display device with a touch detection function 10 is not limited to Figure 1 and Figure 2 The structure shown.

[0030] like Figure 1 or Figure 2 As shown, in the display device 10 with a touch detection function, for example, a display portion 104, a sensor portion 105 including a plurality of sensor electrodes 128, a peripheral portion 106, a first multiplexer 107A and a second multiplexer 107B, a first scan line driving circuit 108A and a second scan line driving circuit 108B, a driver IC 112, a terminal portion in which a plurality of terminals 114 are arranged, and a flexible printed substrate 116 are formed on an insulating surface.

[0031] In this embodiment, the insulating surface refers to the surface of the first substrate 102. The first substrate 102 supports the various layers that constitute the transistors, liquid crystal elements, and the like provided on the surface of the first substrate 102. The first substrate 102 itself is made of an insulating material. The insulating surface may be the surface of the first substrate 102 itself or the surface of an insulating film formed separately on the first substrate 102. As long as an insulating surface can be obtained, the material of the first substrate 102 and the material forming the insulating film are not particularly limited.

[0032] The first substrate 102 has a first side 102A, a second side 102B, a third side 102C, and a fourth side 102D. The first substrate 102 includes a first region 44 outside the display portion 104, and a second region 46 adjacent to the first region 44 and located opposite the first region 44, sandwiching the display portion 104. The first side 102A and the second side 102B are opposed to each other and are parallel or substantially parallel to the second axis D2. The third side 102C and the fourth side 102D are opposed to each other and are parallel or substantially parallel to the first axis D1. The length of the first side 102A is length W1, and the length of the second side 102B is length W2. Lengths W1 and W2 are the same or substantially the same. The lengths W3 and W4 are the same or substantially the same. Lengths W1 and W2 are shorter than lengths W3 and W4. In some cases, the first side 102A and the second side 102B are referred to as short axes, and the third side 102C and the fourth side 102D are referred to as long axes.

[0033] The display unit 104, sensor unit 105, peripheral unit 106, driver IC 112, terminal unit with multiple terminals 114 arranged therein, flexible printed circuit board 116, first scan line driver circuit 108A, and second scan line driver circuit 108B are arranged across both first and second regions 44 and 46. The first multiplexer 107A, dummy wiring 124, and first data signal supply line 134 are arranged in the first region 44, while the second multiplexer 107B, second data signal supply line 136, and sensor wiring 126 are arranged in the second region 46. A portion of the second data signal supply line 136 may also be arranged in the first region 44. The line length of at least one of the multiple dummy wirings 124 in the first region 44 is the same as, or substantially the same as, the line length of at least one of the multiple sensor wirings 126 in the second region 46. The peripheral unit 106 surrounds the display unit 104 and the multiple sensor electrodes 128. The peripheral portion 106 includes a first region 44 and a second region 46 .

[0034] The flexible printed circuit board 116 is electrically connected to a terminal portion provided on the peripheral portion 106, where a plurality of terminals 114 are arranged. The flexible printed circuit board 116 supplies signals from an external circuit (not shown) to the various circuits on the peripheral portion. In this embodiment, one end of the flexible printed circuit board 116 is located between the first side 102A and the driver IC 112. In this embodiment, the flexible printed circuit board 116 is connected near the short axis of the first substrate 102. Signals from the flexible printed circuit board 116 are input from the short axis side and supplied to the display portion 104 and the plurality of sensor electrodes 128.

[0035] The display unit 104 is provided with a plurality of scan lines extending along a first direction and a plurality of data lines extending along a second direction. The area defined by these scan lines and data lines constitutes a pixel area. Within this pixel area, a plurality of pixels 110 are arranged in a matrix, parallel or substantially parallel to the first axis D1 and the second axis D2. Each of the pixels 110 includes a pixel circuit (not shown), a pixel electrode 490, and a liquid crystal element (not shown).

[0036] For example, the plurality of pixels 110 may correspond to a sub-pixel R displaying red, a sub-pixel G displaying green, and a sub-pixel B displaying blue. Alternatively, these three sub-pixels may form a pixel unit. This pixel unit may also include not only these three sub-pixels but also other colors such as W (white) and Y (yellow), or may be composed of any two sub-pixels. Alternatively, each of the sub-pixels R, G, and B may be provided with a color filter layer that emits the three primary colors of red, green, and blue.

[0037] The pixel circuit includes, for example, a transistor and a capacitor as a pixel switch. The transistor includes a gate electrode, a source electrode, and a drain electrode. The gate electrode is electrically connected to the scan line 118. The source electrode is electrically connected to the data line 120. The drain electrode is electrically connected to the pixel electrode 490. The liquid crystal element and the capacitor are electrically connected between the pixel electrode 490 and the common electrode (common electrode). In this embodiment, the sensor electrode 128 also serves as a common electrode. The pixel 110 involved in this embodiment is a structure that can be applied to the FFS (Fringe Field Switching) mode or the IPS (In Plane Switching) mode. In the pixel 110, an electric field (for example, an electric field in the fringe electric field that is parallel or approximately parallel to the upper surface of the first substrate 102) is formed between the sensor electrode 128 serving as the common electrode and the pixel electrode 490. In the display device 10 with a touch detection function involved in this embodiment, this electric field is mainly used to control the liquid crystal layer 178 ( Figure 7 and Figure 8 ) is the orientation of the liquid crystal element contained therein.

[0038] The driver IC 112 is disposed on the first substrate 102 in a COG (Chip on Glass) manner, but the arrangement of the driver IC 112 is not limited to the example shown here. The driver IC 112 may also be disposed on the flexible printed circuit board 116 in a COF (Chip on Film) manner.

[0039] The driver IC 112 is electrically connected to the plurality of terminals 114 using a plurality of wirings 190 arranged between the driver IC 112 and the plurality of terminals 114. Furthermore, the driver IC 112 is electrically connected to the plurality of terminals 264 (including 264A and 264B, see FIG. 1 ) provided in the peripheral portion 106. Figure 5 and Figure 6 ) are electrically connected. The driver IC 112 includes a data line driving circuit and a touch sensor driving circuit. The driver IC 112 functions as a control unit, outputs each signal generated in the driver IC to each terminal 264, and controls the first scan line driving circuit 108A, the second scan line driving circuit 108B, the first multiplexer 107A, the second multiplexer 107B, the plurality of sensor electrodes 128, and the dummy wiring 124. For example, the driver IC 112 has a built-in circuit including the functions of the data line driving circuit (omitted in the figure) other than the sampling switch, and the first multiplexer 107A and the second multiplexer 107B include a transistor 370 (sampling switch ( Figure 7 and Figure 8The data line driving circuit supplies a control signal and a data signal to the first multiplexer 107A and the second multiplexer 107B. The function of the driver IC 112 as a control unit will be described later.

[0040] In this embodiment, the driver IC112, the first scan line driver circuit 108A, the second scan line driver circuit 108B, the first multiplexer 107A, and a part of the second multiplexer 107B are sometimes referred to as a control circuit, and sometimes the driver IC112, the first scan line driver circuit 108A, the second scan line driver circuit 108B, the first multiplexer 107A and the second multiplexer 107B are collectively referred to as a control circuit.

[0041] The first multiplexer 107A is connected to the first region 44 ( Figure 2 ) are electrically connected to the driver IC 112. The first multiplexer 107A is also electrically connected to a plurality of data lines 120 provided in the display portion 104, which are even-numbered data lines 120 (data lines 120-2, 120-4, 120-6, ...) counted from the side farther from the driver IC 112 (the side closer to the second side 102B). The first multiplexer 107A includes a plurality of sampling switches, each of which electrically connects a corresponding first data signal supply line 134 to a corresponding even-numbered data line 120 (e.g., the first data line). Figure 2 As shown, the plurality of data lines 120 electrically connected to the first multiplexer 107A includes a data line 120A.

[0042] The second multiplexer 107B is connected to the second area 46 ( Figure 2 ) are electrically connected to the driver IC 112. The second multiplexer 107B is also electrically connected to a plurality of odd-numbered data lines 120 (data lines 120-1, 120-3, 120-5, ...) of the plurality of data lines 120 provided in the display unit 104, counted from the side farther from the driver IC 112. The second multiplexer 107B includes a plurality of sampling switches, each of which electrically connects a corresponding second data signal supply line 136 to a corresponding odd-numbered data line 120 (e.g., the second data line). Figure 2 As shown, the plurality of data lines 120 electrically connected to the second multiplexer 107B includes a data line 120B.

[0043] The first data signal supply line 134 is routed along the first side 102A and the third side 102C. Furthermore, the first data signal supply line 134 extends in a direction (second axis D2) from the third side 102C toward the fourth side 102D and is electrically connected to the first multiplexer 107A. Driven by the first multiplexer 107A, the first data signal supply line 134 is electrically connected to the corresponding even-numbered data lines 120. The second data signal supply line 136 is routed along the first side 102A and the fourth side 102D. Furthermore, a portion of the second data signal supply line 136 extends in a direction (second axis D2) from the fourth side 102D toward the third side 102C and is electrically connected to the second multiplexer 107B. Driven by the second multiplexer 107B, the second data signal supply line 136 is electrically connected to the corresponding odd-numbered data lines 120. The even-numbered data lines 120 and the odd-numbered data lines 120 are arranged in the display unit 104 including a plurality of pixels 110 .

[0044] Here, the wiring path and line length in the display device with a touch detection function 10 are described. The wiring path in the display device with a touch detection function 10 is, for example, from the driver IC 112 (terminal 264 ( Figure 5 )) to the multiplexers 107A and 107B (data signal supply lines 134 and 136), where line length refers to the length of the wiring path. In the display device with a touch detection function 10, with the center line 122 connecting the midpoints of the first side 102A and the second side 102B in plan view serving as the axis of symmetry, if the wiring paths in the first region 44 and the wiring paths in the second region 46 coincide, the wiring paths in the first region 44 and the wiring paths in the second region 46 are symmetrical to each other, and the line lengths of the wiring paths in the first region 44 and the wiring paths in the second region 46 are the same.

[0045] More specifically, the routing path of the outermost first data signal supply line 134A in the first region 44 is symmetrical to the routing path of the outermost second data signal supply line 136A in the second region 46. The line length of first data signal supply line 134A is the same as the line length of second data signal supply line 136A. Similarly, the routing path of a first data signal supply line 134 located inward of first data signal supply line 134A in the first region 44 is symmetrical to the routing path of a second data signal supply line 136 located inward of second data signal supply line 136A in the second region 46, and both have the same line length. The same relationship applies to the subsequent data signal supply lines 134 and 136 located inward of these supply lines. Furthermore, the base and tip ends of these data signal supply lines 134 and 136 may be slightly detoured relative to their original positions due to their relationship with other wiring and circuit layouts, or due to the structure in which the data lines 120 extend alternately from the upper and lower multiplexers 107A and 107B as described above. Therefore, although the wiring path is symmetrical for most of the time, the symmetry may be slightly unbalanced at the end. However, this is also considered symmetric in this embodiment. More specifically, Figure 1 The two parallel double-dashed lines are aligned with the two short sides of the driver IC 112 at both ends of the long side. In the area between the double-dashed lines, the ends of the so-called data signal supply wirings (134, 136) converge. Due to the connection relationship between them and the driver IC 112, the symmetry of these data signal supply wirings in this area may be slightly unbalanced (see Figure 5 In this embodiment, the term "a pair of corresponding data signal supply wirings 134 and 136 are symmetrical with respect to the center line 122" includes the case where the arrangement is symmetrical at least outside the region between the two-dot chain lines. Alternatively, in this embodiment, the term "a pair of corresponding data signal supply wirings 134 and 136 are of the same length" includes the case where the length is the same at least outside the region between the two-dot chain lines.

[0046] The first scan line driver circuit 108A is, for example, arranged between the display unit 104 and the first side 102A, electrically connected to the driver IC 112, and electrically connected to a plurality of even-numbered scan lines 118, counted from the side closest to the third side 102C. The second scan line driver circuit 108B is, for example, arranged between the display unit 104 and the second side 102B, electrically connected to the driver IC 112, and electrically connected to a plurality of odd-numbered scan lines 118, counted from the side closest to the third side 102C. The plurality of scan lines 118 electrically connected to the first scan line driver circuit 108A and the plurality of scan lines 118 electrically connected to the second scan line driver circuit 108B extend parallel or substantially parallel to the first axis D1 and are arranged alternately. The arrangement of the first scan line driver circuit 108A may be interchanged with the arrangement of the second scan line driver circuit 108B. Furthermore, the first scan line driver circuit 108A and the second scan line driver circuit 108 may be electrically connected to all scan lines 118.

[0047] In addition, in order to facilitate viewing of the display device with a touch detection function 10, Figure 1 In the embodiment, the display portion 104 overlapping the sensor portion 105 including the plurality of sensor electrodes 128, the first data signal supply line 134 overlapping the dummy wiring 124, and the second data signal supply line 136 overlapping the sensor wiring 126 are omitted. Figure 2 In the diagram, the plurality of sensor electrodes 128 overlapping the display portion 104 , the dummy wiring 124 overlapping the first data signal supply line 134 , and the sensor wiring 126 overlapping the second data signal supply line 136 are omitted.

[0048] The plurality of sensor electrodes 128 are arranged in a matrix parallel to or substantially parallel to the first axis D1 and the second axis D2. The plurality of sensor electrodes 128 overlap with the display unit 104, and one sensor electrode 128 overlaps with a plurality of pixels 110 (i.e., pixel electrodes 490). Figure 1 In FIG. 4 , the sensor electrode 128 in the upper left portion overlaps with a plurality of pixel electrodes 490, and the plurality of pixel electrodes 490 that overlap with other sensor electrodes 128 are omitted. In addition, in reality, one sensor electrode 128 overlaps with more than 100 pixel electrodes 490, but for the convenience of explanation, the plurality of pixel electrodes 490 that overlap with other sensor electrodes 128 are omitted. Figure 1 , the size of the pixel electrode 490 is exaggerated.

[0049] Driver IC 112 is electrically connected to multiple sensor wires 126. These wires 126 are routed along first side 102A and fourth side 102D in second region 46, extending in a direction (second axis D2) from fourth side 102D toward third side 102C. This routing allows sensor wires 126 to overlap with second data signal supply lines 136 and second multiplexer 107B. Furthermore, sensor wires 126 extend into display portion 104, overlapping with multiple sensor electrodes 128 and electrically connected to one sensor electrode 128 via contact hole 129.

[0050] Furthermore, the driver IC 112 is electrically connected to a plurality of dummy wirings 124. The plurality of dummy wirings 124 are routed along the first side 102A and the third side 102C in the first region 44, extending in a direction (second axis D2) from the third side 102C toward the fourth side 102D. This routing allows the plurality of dummy wirings 124 to overlap with the plurality of first data signal supply lines 134 and the first multiplexer 107A. The plurality of dummy wirings 124 do not extend to the display portion 104, do not overlap with the plurality of sensor electrodes 128, and are not connected thereto.

[0051] In the display device with a touch detection function 10, for example, a portion of the plurality of sensor wirings 126 and a portion of the plurality of dummy wirings 124 are arranged symmetrically or substantially symmetrically with respect to the center line 122 when viewed from above. More specifically, Figure 1 As shown, the wiring path of the sensor wiring 126A among the multiple sensor wirings 126 configured in the second area 46 is symmetrical to the wiring path of the dummy wiring 124A among the multiple dummy wirings 124 configured in the first area 44, and the line length of the sensor wiring 126A in the peripheral portion 106 is the same as the line length of the dummy wiring 124A.

[0052] More specifically, for example, Figure 1 As shown, the routing path of sensor wiring 126B, which runs on the outermost side of second region 46, is roughly symmetrical with the routing path of dummy wiring 124B, which runs on the outermost side of first region 44. The line length of sensor wiring 126B is the same as the line length of dummy wiring 124B. Furthermore, as with the aforementioned data signal supply lines 134 and 136, the base ends of sensor wiring 126 and dummy wiring 124 may deviate from their original symmetrical arrangement due to their relationship with the output terminal of driver IC 112 and other wiring. Therefore, while the routing paths are symmetrical throughout most of the wiring, the symmetry may be slightly unbalanced at the base ends (terminal peripheral wiring region 160, described later) (described later). However, in this embodiment, this situation is also considered to be a symmetrical arrangement of these multiple sensor wirings 126 and multiple dummy wirings 124.

[0053] Furthermore, the driver IC 112 is electrically connected to a guard electrode 132 surrounding the display unit 104 and the plurality of sensor electrodes 128. The guard electrode 132 is supplied with a constant voltage by the driver IC 112, and has the function of protecting the display unit 104 and the plurality of sensor electrodes 128. The constant voltage is, for example, a voltage VH ( Figure 3 and Figure 4 )、voltage VL( Figure 3 and Figure 4 ), common voltage, etc. The common voltage may be a constant potential or a pulse wave (AC rectangular wave) with a predetermined period, or a fixed potential with a predetermined potential. Preferably, the constant voltage is consistent with the phase of the sensor signal supplied to the sensor electrode 128 (in phase). Alternatively, a structure in which the potential of the guard electrode 132 is always the same as that of the sensor electrode 128 can be adopted. In addition, in the present embodiment, the guard electrode 132 is provided in a frame shape that completely surrounds the display portion 104, but a structure in which a portion of the frame is disconnected midway can also be adopted.

[0054] For example, the display device with a touch detection function 10 uses time-division driving to alternately repeat a period of rewriting the image on the display unit 104 (display period or update period) and a period of performing touch detection using the sensor electrodes 128 (touch detection period).

[0055] The function of the driver IC 112 as a control unit during the display period will be described. For example, the driver IC 112 inputs control signals to the first scan line driver circuit 108A and the second scan line driver circuit 108B. The first scan line driver circuit 108A and the second scan line driver circuit 108B use the control signals to output scan signals to the scan lines 118. For example, the data line driver circuit included in the driver IC 112 supplies control signals and data signals to the first data signal supply line 134, which are then input to the first multiplexer 107A. Furthermore, the data line driver circuit included in the driver IC 112 supplies control signals and data signals to the second data signal supply line 136, which are then input to the second multiplexer 107B. The first multiplexer 107A and the second multiplexer 107B use the control signals input to output data signals corresponding to the image data (image data) displayed on the display unit 104 to the data lines 120. When the scan signal and the data signal are input from the driver IC 112 to the pixel circuit contained in each pixel 110 in the display unit, the transistor contained in the pixel circuit uses the scan signal and the data signal to supply the voltage (pixel signal) corresponding to the image data to the pixel electrode 490. As a result, the plurality of pixels 110 can respectively display the grayscale corresponding to the pixel signal, and an image is formed on the entire display unit. At this time, in order for the plurality of sensor electrodes 128 to function as common electrodes opposite to the pixel electrodes 490, the plurality of sensor electrodes 128 are supplied with a common voltage. The common voltage is a fixed potential or a pulse wave with a predetermined period. In addition, during this display period, the guard electrode 132 is also supplied with a common voltage or a predetermined fixed potential.

[0056] Furthermore, the function of the driver IC 112 as a control unit during the touch detection period is described. For example, the touch sensor driving circuit contained in the driver IC 112 supplies the sensor signal to each sensor wiring 126 through each sensor wiring 126. A portion of the plurality of sensor electrodes 128 forms a capacitance between the sensor electrodes 128 and the object to be detected (such as the user's own finger, touch pen, etc.), thereby changing its own capacitance. The touch sensor driving circuit contained in the driver IC 112 detects the change in its own capacitance, thereby being able to detect the position of the object to be detected on the sensor electrode 128 (on the display unit 104). At this time, the signal supplied by the dummy wiring 124 is a signal that is the same as the sensor signal supplied by the sensor wiring 126. The sensor signal can be, for example, a pulse wave. In the case where the sensor signal is a pulse wave, it is preferred that the phase of the signal supplied to the dummy wiring 124 is consistent with the phase of the sensor signal supplied to the sensor wiring 126 (in phase). Alternatively, a structure can be adopted in which the signals supplied to the sensor wiring 126 and the dummy wiring 124 are the same. Furthermore, during the touch detection period, for example, no scan signals are supplied to the plurality of scan lines 118, and no data signals are supplied to the plurality of data lines 120. The plurality of pixels 110 store image data of an image displayed on the display unit 104 during the display period preceding the touch detection period, and the display unit 104 displays the image. Furthermore, the sensor signals supplied to the sensor electrodes 128 during this touch detection period are also supplied to the guard electrodes 132.

[0057] In this embodiment, the scanning lines 118 , the data lines 120 , and the wiring lines for supplying sensor signals may each be referred to as a signal line.

[0058] <1-2. Signals in the Touch Detection Function Display Device 10>

[0059] Signals in the display device with a touch detection function 10 will be described. Figure 3 (A) and Figure 3 (B) is used to illustrate the Figure 1 and 2 FIG. 1 is a diagram showing a signal state of a certain data line in a display device with a touch detection function in which a dummy wiring and a structure accompanying the dummy wiring are not provided (hereinafter referred to as a comparative example). Figure 4 (A) and Figure 4 (B) is used to illustrate Figure 1 and Figure 2 The diagram shows the signal state of a data line in the display device with a touch detection function 10 according to the present embodiment. The comparative example described above is identical to the present embodiment except for the structure related to the dummy wiring. Therefore, in the following description of the comparative example, the same reference numerals are used for the same structures as those in the present embodiment, and their description is omitted.

[0060] The signals in the comparative example are explained below. In the comparative example, dummy wiring 124 is not provided to overlap with first data signal supply line 134 electrically connected to first multiplexer 107A, while sensor wiring 126 is provided to overlap with second data signal supply line 136 electrically connected to second multiplexer 107B. As a result, when comparing the system in first region 44, which includes driver IC 112 and first multiplexer 107A, and the system in second region 46, which includes driver IC 112 and second multiplexer 107B, there is a difference in the capacitive load. More specifically, the capacitive load in second region 46 is greater than that in first region 44 by the amount where sensor wiring 126 is provided.

[0061] like Figure 3 As shown in (A), the gate electrode 374 ( Figure 7 and Figure 8 ) and the gate electrode 374 ( Figure 7 and Figure 8 ) is supplied with a signal, for example, the same pulse signal. When the gate electrode 374 of the transistor 370 in the first multiplexer 107A is supplied with a pulse signal, the transistor 370 becomes conductive, such as Figure 3 As shown in the curve A in (A), the end portion A of the data line 120 is near (refer to Figure 2 ) The pixel signal supplied by the end portion A rises from the voltage VL to the voltage VH and reaches the voltage VH. When the transistor 370 is turned off, the potential of the signal supplied by the end portion A is slightly lowered from the voltage VH.

[0062] In contrast, the capacity load of the system in the second area 46 is greater than the capacity load of the system in the first area 44. Figure 3 As shown in the curve B in (A), the end portion B of the data line 120 extending from the second multiplexer 107B is near Figure 2 ) The pixel signal supplied by the pixel signal rises from voltage VL only to a voltage ΔVA lower than voltage VH and does not reach voltage VH. In this state, transistor 370 is turned off, and the signal potential supplied from the end portion near B is slightly lowered by this voltage.

[0063] As described above, the signal potential supplied to data line 120 from second data signal supply line 136 via second multiplexer 107B is lower than the signal potential supplied to data line 120 from first data signal supply line 134 via first multiplexer 107A. This potential difference directly manifests as a difference in pixel brightness. In this embodiment, the even-numbered data lines 120-2, 120-4, 120-6, etc. connected to first multiplexer 107A and the odd-numbered data lines 120-1, 120-3, 120-5, etc. connected to second multiplexer 107B are arranged alternately, so the brightness difference is displayed on the screen as a vertical stripe pattern. In other words, the image displayed by the display device with a touch detection function according to the comparative example is an image containing defects.

[0064] In contrast, by adjusting the wiring resistance and parasitic capacitance of the data line 120, as shown in FIG. Figure 3 As shown in (B), the potentials of the data line connected to the first multiplexer 107A and the data line 120 connected to the second multiplexer 107B can both be set to VH. On the other hand, even in this case, the influence of the difference in the capacity load of each system cannot be eliminated. More specifically, as Figure 3 As shown in (B), when the multiplexer that supplies pixel signals to the data line 120 is turned off, the potential of the data line 120 rises slightly. However, the degree of potential rise is related to the capacity load of each system, and the amount of rise is reduced accordingly by the portion with the larger capacity load. As a result, in the comparative example, Figure 3 As shown in (B), the potential rise amount of the data line 120 connected to the first multiplexer 107A having a smaller capacity load of the system ( Figure 3 The curve A) in (B) is greater than the potential rise amount of the data line 120 connected to the second multiplexer 107B ( Figure 3 As shown in curve B) in (B), this potential difference is still reflected as brightness difference.

[0065] Meanwhile, in the display device with a touch detection function 10 according to this embodiment, a dummy wiring 124 is provided that overlaps with the first data signal supply line 134 electrically connected to the first multiplexer 107A, and a sensor wiring 126 is provided that overlaps with the second data signal supply line 136 electrically connected to the second multiplexer 107B. Furthermore, the plurality of dummy wirings 124 and the plurality of sensor wirings 126 are arranged symmetrically with respect to the center line 122 in a plan view and are supplied with the same potential. As a result, the capacitive load of the system in the first area 44 and the capacitive load of the system in the second area 46 are equal.

[0066] The results are as follows Figure 4As shown in (A), the potential reached by the data line 120 connected to the first multiplexer 107A (curve A) and the potential reached by the data line 120 connected to the second multiplexer 107B (curve B) are equal, as shown in FIG. Figure 4 As shown in (B), the amount of increase in the signal potential of the data lines 120 after each multiplexer is turned off is also equal. Therefore, the brightness of the multiple pixels 110 electrically connected to the data lines 120 electrically connected to the second data signal supply line 136 is the same or substantially the same as the brightness of the multiple pixels 110 electrically connected to the data lines 120 electrically connected to the first data signal supply line 134. As a result, in the display device with a touch detection function 10 according to this embodiment, defects in the image displayed on the screen are suppressed.

[0067] In addition, the so-called "equal capacity loads", "equal arrival potentials", and "equal signal potential rises" mentioned above certainly include that these capacity loads, arrival potentials, and signal potential rises are exactly the same, and also include extremely slight deviations to the extent that brightness deviations cannot be identified and errors that are inevitably generated in the design and manufacturing process.

[0068] <1-3. Structure of Display Device 10 with Touch Detection Function>

[0069] Figure 5 and Figure 6 It is a plan view showing the structure of wiring of the display device with a touch detection function 10 . Figure 7 Yes Figure 1 The cross-sectional view of the main part of the display device with a touch detection function 10 taken along the line A1-A2 is shown. Figure 8 Yes Figure 1 The structure of the display device with a touch detection function 10 is not limited to the structure of the display device with a touch detection function 10. Figures 5 to 8 The structure shown. Figures 5 to 8 In the structure shown, Figure 1 to Figure 1 or Figure 2 、 Figure 4 (A) and Figure 4 (B) The same or similar structures are sometimes omitted from description.

[0070] Figure 5 It means when Figure 1 and Figure 2 The diagram shows an example of a layout of the first wiring group 164 in the terminal portion peripheral wiring region 160 , with the third side 102C side enlarged relative to the center line 122 , when viewed from above. Figure 6 It means when Figure 1 and Figure 2The diagram shows an example of a layout of the second wiring group 166 in the terminal portion peripheral wiring region 160 , with the fourth side 102D side enlarged relative to the center line 122 , when viewed from above.

[0071] First, use Figure 6 or Figure 8 The second wiring group 166 will be described. Figure 6 As shown, the second wiring group 166 is arranged in the second region 46. The second data signal supply line 136 includes at least a terminal wiring 140 electrically connected to the terminal 264, and a second data signal supply line 156 electrically connected to the terminal wiring 140 through the contact hole 150. Figure 6 2 shows an example in which ten second data signal supply lines 136 are electrically connected to the driver IC 112 , but the number of second data signal supply lines 136 may be ten or more.

[0072] The sensor wiring 126 includes at least a terminal wiring 140 electrically connected to the terminal 264, a metal wiring 256 arranged in the same layer (conductive layer 242) as the second data signal supply line 156 electrically connected to the terminal wiring 140 via the contact hole 150, and a sensor wiring 146 electrically connected to the metal wiring 256 via the contact hole 152. In this embodiment, for example, three sensor wirings 126 (126-1 to 126-3 (146-1 to 146-3)) have the above-described structure and are connected to the terminal 264 in the second region 46, while the other sensor wirings 126 (126-4 to 126-6 (146-4 to 146-6)) extend from the second region 46 to the first region 44 (see FIG. 1 ). Figure 5 ).

[0073] In addition, the details are described later, refer to Figure 8 (Cross-sectional view) Conductive layer 204 including terminal 264 and terminal wiring 140 is disposed on insulating layer 203 on first substrate 102. Terminal 264 is electrically connected to terminal wiring 140. Contact hole 150 penetrates gate insulating layer 206 and insulating layer 214. Second data signal supply line 156 (136) and metal wiring 256 are included in conductive layer 242 disposed on insulating layer 214 on first substrate 102. Contact hole 152 penetrates insulating layer 168. Sensor wiring 146 (126) is included in conductive layer 244 disposed on insulating layer 168.

[0074] Furthermore, three sensor wirings 126-4 to 126-6 among the six sensor wirings 126-1 to 126-6 are respectively included in Figure 5In the first wiring group 164 shown, the metal wiring 256 is electrically connected using the contact hole 152, and the metal wiring 256 to which the sensor wirings 126-4 to 126-6 are electrically connected is electrically connected to the terminal wiring 140 using the contact hole 150. Figure 6 , an example is shown in which six sensor wires 126 - 1 to 126 - 6 are electrically connected to the driver IC 112 , but the number of sensor wires 126 may be seven or more.

[0075] The three spare terminals 264B included in the second wiring group 166 are not electrically connected to the sensor wirings 126 - 1 to 126 - 6 and the second data signal supply line 136 .

[0076] Next, Figure 5 The first wiring group 164 is shown as an example. Figure 5 As shown, the first wiring group 164 is arranged in the first region 44. The first data signal supply line 134 includes a terminal wiring 140 electrically connected to the terminal 264, and a first data signal supply line 154 electrically connected to the terminal wiring 140 through the contact hole 150. Figure 5 2 shows an example in which ten first data signal supply lines 134 are electrically connected to the driver IC 112 , but the number of first data signal supply lines 134 may be ten or more.

[0077] Furthermore, the sensor wiring 126 (126-4 to 126-6) extending from the second area 46 toward the first area 44 includes at least a terminal wiring 140 electrically connected to the terminal 264, a metal wiring 256 arranged in the same layer (conductive layer 242) as the second data signal supply line 156 electrically connected to the terminal wiring 140 through the contact hole 150, and a sensor wiring 146 (146-4 to 146-6) electrically connected to the metal wiring 256 through the contact hole 152.

[0078] Furthermore, a structure is provided in first region 44 to connect dummy wiring 124 and dummy wiring 144 to terminal 264. More specifically, each dummy wiring 124 includes at least terminal wiring 140 electrically connected to terminal 264, metal wiring 256 electrically connected to terminal wiring 140 via contact hole 150, and dummy wiring 144 electrically connected to metal wiring 256 via contact hole 152. In this embodiment, for example, dummy wiring 124 is configured using spare terminals 264A, which are positioned symmetrically or substantially symmetrically with spare terminals 264B included in second wiring group 166, among the plurality of terminals 264. Specifically, multiple (six in this embodiment) dummy wirings 124-1 to 124-6 (144-1 to 144-6) are electrically connected to strip-shaped metal wiring 256 using contact holes 152, respectively. These metal wirings 256 are electrically connected to two spare terminals 264A using two contact holes 150.

[0079] In addition, the details are described later, refer to Figure 7 (Cross-sectional view), the spare terminal 264A is included in the conductive layer 204 and is arranged on the insulating layer 203 on the first substrate 102. The spare terminal 264A is electrically connected to the terminal wiring 140. The first data signal supply line 154 (134), the second data signal supply line 156 (136), and the metal wiring 256 are included in the conductive layer 242 arranged on the insulating layer 214 on the first substrate 102. The dummy wiring 124 (144), like the sensor wiring 146 (126), is included in the conductive layer 244 arranged on the insulating layer 168.

[0080] The guard electrode 132 is configured using the terminal wiring 140. Figure 6 Although described in the second wiring group 166 , three sensor wirings 126 - 4 to 126 - 6 among the six sensor wirings 126 - 1 to 126 - 6 are included in the first wiring group 164 .

[0081] Reference Figure 5 and Figure 6In these two figures, the wiring included in the first wiring group 164 is arranged symmetrically with the wiring included in the second wiring group 166. Specifically, the ten first data signal supply lines 134 are arranged symmetrically with the ten second data signal supply lines 136, and a portion of the six dummy wiring lines 124-1 to 124-6 is arranged approximately symmetrically with a portion of the six sensor wiring lines 126-1 to 126-6. The metal wiring lines 256 electrically connected to the six dummy wiring lines 124-1 to 124-6 are electrically connected to two spare terminals 264A in close proximity to the driver IC 112. Furthermore, the number of contact holes 152 (six) for the metal wiring lines 256 electrically connected to the six dummy wiring lines 124-1 to 124-6 is the same as the number of contact holes 152 (six) for the metal wiring lines 256 electrically connected to the six sensor wiring lines 126-1 to 126-6.

[0082] In the display device 10 with a touch detection function, the dummy wiring lines 124 and sensor wiring lines 126 are arranged symmetrically with respect to the center line 122. More specifically, the lengths, bending positions, and number of corresponding dummy wiring lines 124 and sensor wiring lines 126 are identical, at least in the region from the terminal peripheral wiring region 160 to the multiplexers 107A and 107B. Furthermore, each dummy wiring line 124 and sensor wiring line 126 has the same number of contact holes 152 in the terminal peripheral wiring region 160. This structure of the dummy wiring lines 124 and sensor wiring lines 126 makes the total impedance of the dummy wiring lines 124 and sensor wiring lines 126 substantially uniform, thereby suppressing the aforementioned vertical streaking patterns or image defects such as vertical streaks. As a result, the load on the multiple data lines 120 in the display device 10 with a touch detection function is substantially uniform. Therefore, by using the display device with a touch detection function 10 according to the present embodiment, defects in an image displayed on the screen are suppressed.

[0083] In this embodiment, three sensor wires 126-1 to 126-3 of the six sensor wires 126-1 to 126-6 are included in the first wire group 164. However, all six sensor wires 126-1 to 126-6 may be included in the second wire group 166. By including all six sensor wires 126-1 to 126-6 in the second wire group 166, the total impedance of the dummy wire 124 and the sensor wire 126 can be accurately matched.

[0084] Next, use Figure 7 and Figure 8 The cross-sectional structure of the display device with a touch detection function 10 will be described in detail.

[0085] Transistor 370 is a sampling switch included in the first multiplexer 107A or the second multiplexer 107B. Transistor 370 is a bottom-gate transistor including a semiconductor layer 212. Transistors having the same structure as transistor 370 described here are used, for example, in the first multiplexer 107A, the second multiplexer 107B, the first scan line driver circuit 108A, and the second scan line driver circuit 108B.

[0086] like Figure 7 As shown, the insulating layer 203 is provided as a base layer on the first substrate 102. The insulating layer 203 may be a plurality of insulating layers stacked. A conductive layer 204 is provided on the insulating layer 203. The conductive layer 204 includes a gate electrode 374 of the transistor 370 and the terminal wiring 140.

[0087] A gate insulating layer 206 is provided on a portion of the upper surface of the insulating layer 203, the gate electrode 374, and the terminal wiring 140, in contact with the upper surface and side surfaces of the gate electrode 374 and a portion of the upper surface and side surfaces of the terminal wiring 140. A semiconductor layer 212 is provided on the upper surface of the gate insulating layer 206. The gate electrode 374 faces the semiconductor layer 212. The insulating layer 214 is arranged in contact with a portion of the upper surface of the gate insulating layer 206 and the upper surface and side surfaces of the semiconductor layer 212. Contact holes 222 and 221 are formed in the insulating layer 214, and a contact hole 150 is formed that penetrates the insulating layer 214 and the gate insulating layer 206. A conductive layer 242 is arranged on the insulating layer 214. The conductive layer 242 includes a data line 120, a first terminal 208 functioning as a source electrode 372 of the transistor 370, a second terminal 210 functioning as a drain electrode 376 of the transistor 370, a first data signal supply line 154 (134) electrically connected to the first terminal 208, the first data signal supply line 154 (134) extending along the D1-D2 plane, and a metal wiring 256 electrically connected to the terminal wiring 140 via a contact hole 150. The first terminal 208 is electrically connected to one end of the pattern of the semiconductor layer 212 via a contact hole 221, and the second terminal 210 is electrically connected to the other end of the pattern of the semiconductor layer 212 via a contact hole 222.

[0088] An insulating layer 168 is disposed so as to contact the upper surface and side surfaces of the data line 120, the upper surface and side surfaces of the first terminal 208, the upper surface and side surfaces of the second terminal 210, the upper surface and side surfaces of the first data signal supply line 154 (134), the upper surface and side surfaces of the metal wiring 256, and the insulating layer 214. A contact hole 152 is formed in the insulating layer 168.

[0089] Conductive layer 244 is disposed on the upper surface of insulating layer 168. Conductive layer 244 includes dummy wiring 144 and sensor wiring 146. Dummy wiring 144 is electrically connected to metal wiring 256 via contact hole 152. Dummy wiring 144 overlaps at least a portion of first data signal supply line 154 via insulating layer 168. Insulating layer 170 is disposed so as to contact the upper surface of insulating layer 168, the upper surface and side surfaces of sensor wiring 146, and the upper surface and side surfaces of dummy wiring 144. Contact hole 129 is formed in insulating layer 170.

[0090] Conductive layer 172 is disposed on the upper surface of insulating layer 170. Conductive layer 172 includes sensor electrode 128. Sensor electrode 128 is electrically connected to sensor wiring 146 via contact hole 129. Insulating layer 174 is disposed in contact with the upper surface of insulating layer 170 and the upper surface and side surfaces of sensor electrode 128.

[0091] A conductive layer 176 is arranged on the upper surface of the insulating layer 174. The conductive layer 176 includes a guard electrode 132 and a plurality of pixel electrodes 490. Although not shown in the figure, the guard electrode 132 is electrically connected using, for example, the terminal wiring 140, the contact hole 150, the first data signal supply line 154, the contact hole 152, the dummy wiring 144, and a contact hole electrically connected to the dummy wiring 144. Furthermore, although not shown in the figure, the plurality of pixel electrodes 490 are electrically connected to the drain electrodes of the transistors of the pixel circuit contained in the pixel 110. The transistors of the pixel circuit have the same structure as the transistor 370. In addition, in the display device 10 with a touch detection function, an example is shown in which the dummy wiring 144 does not overlap with the guard electrode 132, but the dummy wiring 144 may also overlap with the guard electrode 132.

[0092] In this embodiment, for example, a portion including the first substrate 102 stacked on the third axis D3 and the conductive layer 176 is referred to as the array substrate 30 , and the second substrate 40 is referred to as the counter substrate.

[0093] In the display device with a touch detection function 10, for example, the insulating layer 174 of the array substrate 30 and the second substrate 40 are bonded together in a sealing portion (not shown) so as to face each other. A color filter layer can also be disposed on the surface of the second substrate 40 facing the array substrate 30. A liquid crystal layer 178 including liquid crystal elements is injected between the insulating layer 174 of the array substrate 30 and the second substrate 40.

[0094] In the display device with a touch detection function 10, the insulating layer 203, gate insulating layer 206, insulating layer 214, and insulating layer 174 are formed using, for example, an inorganic insulating film. The insulating layer 168 and insulating layer 170 are formed using, for example, an organic insulating film. Inorganic insulating films are thinner than organic insulating films, while organic insulating films are thicker than inorganic insulating films. Organic insulating films can be formed thicker and function as a planarizing film that mitigates unevenness in the underlying layer of the organic insulating film.

[0095] exist Figure 8 In the end section shown, Figure 7 In the end cross-sectional view shown, the first data signal supply line 154 (134) is replaced by the second data signal supply line 156 (136), and the dummy wiring 144 is not configured. Figure 8 In the end section shown, except for Figure 7 The end cross-sectional views shown are the same, so the description here is omitted.

[0096] like Figure 8 As shown, conductive layer 244 is disposed on the upper surface of insulating layer 168. Conductive layer 244 includes sensor wiring 146. Sensor wiring 146 is electrically connected to metal wiring 256 via contact hole 152. Sensor wiring 146 overlaps at least a portion of second data signal supply line 156 via insulating layer 168. Insulating layer 170 is disposed so as to contact the upper surface of insulating layer 168, the upper surface and side surfaces of sensor wiring 146, and the upper surface and side surfaces of sensor wiring 146. Contact hole 129 is formed in insulating layer 170. Sensor wiring 146 is electrically connected to sensor electrode 128 via contact hole 129.

[0097] <Second embodiment>

[0098] In the second embodiment, the structure of the display device with a touch detection function 10, which differs from that of the first embodiment, is described. In the display device with a touch detection function 10 according to the second embodiment, auxiliary wiring 124C is arranged on the plurality of sensor electrodes 128 overlapping the display unit 104. Other aspects are the same as those of the display device with a touch detection function 10 according to the first embodiment, and therefore, description thereof will be omitted.

[0099] Figure 9 : is a plan view showing the structure of a display device with a touch detection function 10 according to a second embodiment of the present invention. Figure 9 , structures other than the display portion 104 and its periphery are omitted.

[0100] like Figure 9 As shown, four sensor wires 126 are arranged along the second axis D2 , and the four sensor electrodes 128 are electrically connected to the four sensor wires 126 on a one-to-one basis.

[0101] Of the four sensor electrodes 128, the sensor electrode 128 closest to the first multiplexer 107A is electrically connected to the sensor wiring 126 via four contact holes 129, and three auxiliary wirings 124C are electrically connected via four contact holes 129. The three auxiliary wirings 124C are arranged parallel to the second axis D2 on extensions of the dummy wiring 124, but are not connected to the dummy wiring 124.

[0102] In the sensor electrode 128 next closest to the first multiplexer 107A, the sensor wiring 126 is electrically connected through four contact holes 129 , and the two auxiliary wirings 124C are electrically connected through four contact holes 129 , respectively.

[0103] As the distance from the first multiplexer 107A to the second multiplexer 107B ( Figure 2 ), the number of sensor wirings 126 overlapping sensor electrodes 128 increases, and the number of electrically connected auxiliary wirings 124C decreases. Sensor electrode 128 closest to second multiplexer 107B overlaps four sensor wirings 126 and is electrically connected to one of these sensor wirings 126 via four contact holes 129; no auxiliary wiring 124C is provided.

[0104] like Figure 9 As shown, an auxiliary wiring 124C and an opposing sensor wiring 126 are arranged on the extension line of the dummy wiring 124. Figure 9 The number of dummy wirings 124, the number of auxiliary wirings 124C, the number of sensor electrodes 128, and the number of contact holes 129 are examples and are not limited to the following. Figure 9 The structure shown.

[0105] In the display device with a touch detection function 10 according to the second embodiment, one or more auxiliary wirings 124C are provided between each sensor wiring 126 and the dummy wiring 124 disposed opposite thereto, and each auxiliary wiring 124C is connected to a sensor electrode 128. As a result, the total impedance of the dummy wiring 124 and the sensor wiring 126 is averaged by adding the parasitic capacitance applied to each data line 120 due to the outside of the display unit 104 and the parasitic capacitance applied to each data line 120 due to the inside of the display unit 104.

[0106] The various embodiments of the display device 10 with a touch detection function described above as embodiments of the present invention can be implemented in appropriate combinations as long as they do not conflict with each other. Furthermore, within the scope of the present invention, those skilled in the art will be able to devise equivalent variations and modifications, and these variations and modifications should be understood to fall within the scope of the present invention. For example, in this embodiment, a structure is employed in which odd-numbered data lines 120 extend from the second multiplexer 107B and even-numbered data lines 120 extend from the first multiplexer 107A. However, a structure may also be employed in which all data lines 120 extend from both multiplexers 107A and 107B, while also extending the data lines 120 only to the center of the display portion and facing each other. Furthermore, in the display device 10 with a touch detection function according to this embodiment, an example is shown in which a liquid crystal element is used for the display portion 104. However, the display portion 104 of the display device 10 with a touch detection function may also use an EL element as a light-emitting element. In this case, the sensor electrode 128 does not function as a common electrode during the display period as described above. The sensor electrode 128 and the sensor wiring are provided on the EL element, and in the peripheral portion, the sensor wiring and the dummy wiring are opposite to the data signal supply line via an insulating layer.

[0107] Furthermore, for each of the above-mentioned embodiments, methods obtained by those skilled in the art by appropriately adding, deleting, or changing the design of constituent elements, or by adding, omitting, or changing the conditions of processes are included in the scope of the present invention as long as they have the purpose of the present invention.

[0108] Furthermore, regarding other effects brought about by the method in one embodiment of the present invention, the effects that are obvious from the description of this specification, or the effects that can be appropriately thought of by technicians in this industry should of course be understood as the effects brought about by the present invention.

[0109] Description of Reference Numerals

[0110] 10…display device with touch detection function; 30…array substrate; 40…second substrate; 44…first region; 46…second region; 102…first substrate; 102A…first side; 102B…second side; 102C…third side; 102D…fourth side; 104…display unit; 105…sensor unit; 106…peripheral unit; 107A…first multiplexer; 107B…second multiplexer; 108A…first scan line driver circuit; 108B…second scan line driver circuit; 110…pixel; 112…driver Driver IC; 114…terminal; 116…flexible printed circuit board; 118…scanning line; 120…data line; 120A…data line; 120B…data line; 122…center line; 124…dummy wiring; 124B…dummy wiring; 124C…auxiliary wiring; 126…sensor wiring; 126A…sensor wiring; 126B…sensor wiring; 128…sensor electrode; 129…contact hole; 132…guard electrode; 134…first data signal supply line; 134A…first data signal supply line; 136…Second data signal supply line; 136A…Second data signal supply line; 140…Terminal wiring; 144…Dummy wiring; 146…Sensor wiring; 150…Contact hole; 152…Contact hole; 154…First data signal supply line; 156…Second data signal supply line; 160…Terminal peripheral wiring region; 164…First wiring group; 166…Second wiring group; 168…Insulating layer; 170…Insulating layer; 172…Conductive layer; 174…Insulating layer; 176…Conductive layer; 178…Liquid crystal Layer; 190…wiring; 203…insulating layer; 204…conductive layer; 206…gate insulating layer; 208…first terminal; 210…second terminal; 212…semiconductor layer; 214…insulating layer; 221…contact hole; 222…contact hole; 242…conductive layer; 244…conductive layer; 256…metal wiring; 264…terminal; 264A…spare terminal; 264B…spare terminal; 370…transistor; 372…source electrode; 374…gate electrode; 376…drain electrode; 490…pixel electrode.

Claims

1. A display device with a touch detection function, characterized in that: have: A display portion is configured with a first data line and a second data line; a first area outside the display portion, and a second area on the opposite side of the first area across the display portion; a sensor portion overlapping the display portion and including a sensor electrode; a first data signal supply line electrically connected to the first data line and disposed in the first area; a second data signal supply line electrically connected to the second data line and disposed in the second area; a dummy wiring, arranged in the first region and not connected to the sensor electrode; as well as a sensor wiring arranged in the second region and connected to the sensor electrode; The dummy wiring overlaps at least a portion of the first data signal supply line via an insulating layer. The sensor wiring overlaps at least a portion of the second data signal supply line via the insulating layer. A line length in the first region of the dummy wiring is the same as a line length in the second region of the sensor wiring.

2. The display device with a touch detection function according to claim 1, wherein: The display portion, the first region, the second region, the sensor portion, the first data signal supply line, the second data signal supply line, the dummy wiring, the sensor wiring, and the insulating layer are arranged on a substrate. The substrate has a first side and a second side facing each other, and a third side and a fourth side facing each other, The first data signal supply line and the second data signal supply line are arranged symmetrically with respect to a center line connecting midpoints of the first side and the second side in a plan view.

3. The display device with a touch detection function according to claim 2, characterized in that: The display portion includes a plurality of pixels. The first data line is electrically connected to a portion of the plurality of pixels. The second data line is electrically connected to a plurality of pixels adjacent to a portion of the plurality of pixels and different from a portion of the plurality of pixels.

4. The display device with a touch detection function according to claim 3, characterized in that: A portion of the first data signal supply line and a portion of the dummy wiring are routed along the first side and the third side in the first region. A portion of the second data signal supply line and a portion of the sensor wiring are routed along the first side and the fourth side in the second region.

5. The display device with a touch detection function according to claim 4, characterized in that: The display device with a touch detection function has a flexible substrate. The flexible substrate is arranged between the first side and the display portion in a plan view.

6. The display device with a touch detection function according to claim 5, characterized in that: The display device with a touch detection function includes a driver IC arranged on the substrate, and a first multiplexer and a second multiplexer arranged on the substrate. The first data signal supply line connects the driver IC and the first multiplexer, The second data signal supply line connects the driver IC and the second multiplexer, The dummy wiring is electrically connected to the driver IC, overlaps with the first multiplexer, and is spaced apart from the sensor electrode in a plan view. The sensor wiring is electrically connected between the driver IC and the sensor electrode, and overlaps with the second multiplexer.

7. The display device with a touch detection function according to claim 6, characterized in that: The dummy wiring is supplied with a signal having the same phase as the sensor signal supplied from the sensor electrode.

8. The display device with a touch detection function according to claim 6, wherein: The display device with a touch detection function has a plurality of the dummy wirings and a plurality of the sensor wirings. The plurality of dummy wirings are electrically connected to the driver IC using the same number of contact holes as the number of sensor wirings.

Images