Display substrate with suppressed display unevenness, and display device

Abstract

To inhibit generation of display unevenness.SOLUTION: A display substrate 21 comprises: a first wire 27α; a first switching element 23α connected to the first wire 27α; a second switching element 23β connected to the first wire 27α; a second wire 31α overlapping the first wire 27α; a first electrode 24α connected to the first switching element 23α; a second electrode 24β connected to the second switching element 23β; and a third electrode 30α overlapping the first electrode 24α and the second electrode 24β. The third electrode 30α includes a first slit 30Aα overlapping part of the second wire 31α, a second slit 30Aβ overlapping part of the second wire 31α, and a residual part 30B overlapping part of the second wire 31α. The first electrode 24α is arranged side by side to the first slit 30Aα in a second direction intersecting the first direction, and includes a first overlapping portion 40 overlapping part of the first slit 30Aα. The second electrode 24β is arranged side by side to the residual part 30B in the second direction, and includes a second overlapping portion 41 overlapping part of the residual part 30B.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a display substrate and a display device. [Background technology]

[0002] Conventionally, an active matrix substrate described in Patent Document 1 has been known as an example of a display substrate provided in a display device. The active matrix substrate described in Patent Document 1 includes a lower insulating layer covering a light-shielding layer, pixel TFTs including an oxide semiconductor layer, gate wiring in the row direction and source wiring in the column direction, a common electrode including touch sensor electrode segments provided on an interlayer insulating layer covering the pixel electrodes and wiring, and touch wiring in the column direction, wherein the source wiring and touch wiring are located between the substrate and the lower insulating layer and are formed from the same film as the light-shielding layer, the pixel electrodes are formed from the same film as the oxide semiconductor layer, a pair of gate wirings are connected to one pixel row, and one source wiring is connected to a pair of pixel columns including a first pixel column and an adjacent second pixel column, and when viewed from the normal direction to the main surface of the substrate, each source wiring is arranged between the corresponding first pixel column and second pixel column, and each touch wiring is arranged between two adjacent pixel columns. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-105638 Summary of the Invention [Problem to be solved by the invention]

[0004] In the active matrix substrate described in Patent Document 1, touch sensor electrodes are arranged to overlap touch wiring. In this configuration, a large parasitic capacitance occurs between the touch wiring and the touch sensor electrode that is not connected to the touch wiring, which may adversely affect the potential of the touch sensor electrode. To mitigate this adverse effect, for example, a slit may be provided in the touch sensor electrode at the portion that overlaps the touch wiring. The slit cannot be formed over the entire length of the touch sensor electrode. Therefore, a difference in the strength of the electric field generated between the source wiring and the touch electrode occurs between the slit and the portion of the touch electrode where the slit is not formed, which may result in visually noticeable display unevenness.

[0005] The technology described in this specification was developed based on the above circumstances, and aims to suppress the occurrence of display unevenness. [Means for solving the problem]

[0006] (1) A display substrate according to the technology described in this specification includes: a first wiring made of a first conductive film and extending along a first direction; a first switching element connected to the first wiring; a second switching element connected to the first wiring; a second wiring made of a second conductive film arranged above the first conductive film with a first insulating film interposed therebetween, extending along the first direction and overlapping the first wiring; a first electrode made of a third conductive film arranged above the second conductive film with a second insulating film interposed therebetween, connected to the first switching element; a second electrode made of a portion of the third conductive film separate from the first electrode, connected to the second switching element; and a third electrode made of a fourth conductive film arranged above the third conductive film with a third insulating film interposed therebetween, overlapping the first electrode and the second electrode. The third electrode has a first slit extending along the first direction and arranged overlapping a portion of the second wiring, a second slit extending along the first direction and arranged overlapping a portion of the second wiring and arranged at a distance from the first slit in the first direction, and a remaining portion arranged overlapping a portion of the second wiring and remaining between the first slit and the second slit in the first direction, wherein the first electrode is arranged so as to be aligned with the first slit in a second direction intersecting the first direction but not aligned with the remaining portion in the second direction, and has a first overlapping portion overlapping at least a portion of the first slit, and the second electrode is arranged so as to be aligned with the remaining portion in the second direction and overlapping at least a portion of the remaining portion.

[0007] (2) In addition to (1), the display substrate may be configured such that the third electrode is formed wider than the second wiring so that the first slit includes a first region where it overlaps with the second wiring and a second region where it does not overlap with the second wiring, and the first overlapping portion is arranged to overlap at least the second region of the first slit.

[0008] (3) In addition to (1) or (2), the display substrate may further include a third switching element connected to the first wiring, a fourth electrode made of a part of the third conductive film separate from the first electrode and the second electrode and connected to the third switching element, and a fifth electrode made of a part of the fourth conductive film separate from the third electrode and arranged to overlap the fourth electrode, and the second wiring may be connected to the fifth electrode.

[0009] (4) In addition to (3), the display substrate may further include a third wiring made of a part of the first conductive film separate from the first wiring and extending along the first direction, a fourth wiring made of a part of the second conductive film separate from the second wiring and extending along the first direction and arranged overlapping the third wiring, and a signal supply unit connected to each end of one of the first wiring and the third wiring and supplying signals to the first wiring and the third wiring, respectively, wherein the fifth electrode is arranged farther from the signal supply unit in the first direction than the third electrode, and the fourth wiring is connected to the third electrode.

[0010] (5) A display device according to the technology described in this specification includes a display substrate according to any one of (1) to (4) above, and an opposing substrate arranged opposite the display substrate with a gap therebetween. [Effects of the Invention]

[0011] According to the technology described in this specification, it is possible to suppress the occurrence of display unevenness. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view showing a liquid crystal panel, a driver, a flexible substrate, and the like that constitute a liquid crystal display device according to a first embodiment. [Figure 2] FIG. 1 is a plan view showing a pixel arrangement in a display area of ​​an array substrate constituting a liquid crystal panel according to Embodiment 1, in which each component consisting of a first metal film, a semiconductor film, a second metal film, and a first transparent electrode film is shown with different hatching. [Figure 3] FIG. 3 is a plan view showing the same range as FIG. 2 in the display region of the array substrate according to the first embodiment, in which the configuration made of the second transparent electrode film is shaded. [Figure 4] 4 is a cross-sectional view of the liquid crystal panel according to the first embodiment taken along line iv-iv in FIG. 2 . [Figure 5] FIG. 1 is a cross-sectional view showing a connection structure between a touch electrode and a touch wiring on an array substrate according to a first embodiment; [Figure 6] FIG. 2 is a plan view schematically showing the relationship between a driver, a touch electrode, a source line, a touch line, and a dummy line provided on the array substrate according to the first embodiment; [Figure 7] FIG. 1 is an enlarged plan view of a first TFT and its vicinity adjacent to a first slit provided in a first touch electrode in a display area of ​​the array substrate according to the first embodiment, in which each configuration including a first metal film, a semiconductor film, a second metal film, and a first transparent electrode film is shown with different hatching. [Figure 8] FIG. 1 is an enlarged plan view of a first TFT and its vicinity adjacent to a first slit provided in a first touch electrode in a display region of the array substrate according to the first embodiment, in which a configuration made of a second transparent electrode film is shown shaded. [Figure 9] 8. A cross-sectional view of the array substrate according to the first embodiment taken along line xx in FIG. [Figure 10] FIG. 1 is an enlarged plan view of a second TFT and its vicinity adjacent to a remaining portion of a first touch electrode in a display area of ​​the array substrate according to the first embodiment, in which each configuration including a first metal film, a semiconductor film, a second metal film, and a first transparent electrode film is shown with different hatching. [Figure 11] FIG. 1 is an enlarged plan view of a second TFT and its vicinity adjacent to a remaining portion of a first touch electrode in a display region of the array substrate according to the first embodiment, in which a configuration made of a second transparent electrode film is shown shaded. [Figure 12] 12 is a cross-sectional view of the array substrate according to the first embodiment taken along line xii-xii in FIG. 10 . DETAILED DESCRIPTION OF THE INVENTION

[0013] <Embodiment 1> A first embodiment will be described with reference to Figs. 1 to 12. In this embodiment, a liquid crystal panel (display device) 10 having an image display function and a touch panel function (position input function, position detection function) will be illustrated. Note that the X-axis, Y-axis, and Z-axis are shown in a portion of each drawing, and each axis direction is depicted as being in the direction shown in each drawing. Also, the upper side of Figs. 2, 4, 5, 9, and 12 is the front side, and the lower side of each drawing is the back side.

[0014] The planar configuration of the liquid crystal panel 10 will be described with reference to FIG. 1. As shown in FIG. 1, the liquid crystal panel 10 has an overall planar shape that is horizontally elongated and approximately rectangular. The liquid crystal panel 10 has a short side aligned with the Y-axis, a long side aligned with the X-axis, and a thickness direction (a direction normal to the main surfaces of the substrates 20 and 21) aligned with the Z-axis. In this embodiment, the Y-axis direction is the "first direction," and the X-axis direction is the "second direction." The liquid crystal panel 10 is capable of displaying images using illumination light emitted from a backlight device (illumination device) disposed on the rear side of the liquid crystal panel 10. The backlight device is disposed on the rear side (back surface side) of the liquid crystal panel 10 and includes, for example, a light source (e.g., an LED) and an optical member that converts the light from the light source into planar light by applying an optical effect to the light.

[0015] As shown in FIG. 1, the central portion of the screen of the liquid crystal panel 10 is a display area AA (the area surrounded by a dashed line in FIG. 1) where an image is displayed. In contrast, the outer peripheral portion of the screen of the liquid crystal panel 10, which is a frame-shaped (frame-like) portion surrounding the display area AA, is a non-display area NAA where no image is displayed. The liquid crystal panel 10 is formed by bonding a pair of substrates 20, 21. Of the pair of substrates 20, 21, the substrate on the front side (front surface) is a counter substrate 20, and the substrate on the back side (rear surface) is an array substrate (display substrate, active matrix substrate) 21. Both the counter substrate 20 and the array substrate 21 are formed by laminating various films on the inner surface of a glass substrate. Polarizing plates are attached to the outer surfaces of both substrates 20, 21.

[0016] As shown in FIG. 1 , the counter substrate 20 has a shorter short side dimension than the array substrate 21, and is bonded to the array substrate 21 such that one end of the counter substrate 20 in the short side direction (Y-axis direction) is aligned with the array substrate 21. Therefore, the other end of the array substrate 21 in the short side direction is a protruding portion 21A that protrudes laterally from the counter substrate 20 and does not overlap with the counter substrate 20. A driver (signal supply unit) 11 and a flexible substrate 12 are mounted on the protruding portion 21A of the array substrate 21 to supply various signals related to the display function and touch panel function, which will be described below. The driver 11 is mounted on the protruding portion 21A of the array substrate 21 using a COG (chip-on-glass) method. The driver 11 is an LSI chip with an internal drive circuit and processes various signals transmitted by the flexible substrate 12. It can be said that the driver 11 is disposed on one end of the array substrate 21 in the Y-axis direction relative to the display area AA. The flexible substrate 12 is configured by forming a large number of wiring patterns on a base material made of an insulating and flexible synthetic resin material (such as a polyimide resin). One end of the flexible substrate 12 is connected to the array substrate 21, and the other end is connected to an external control substrate (signal supply source). Various signals supplied from the control substrate are transmitted to the liquid crystal panel 10 via the flexible substrate 12. In addition, a pair of gate circuit units 13 are provided in the non-display area NAA of the array substrate 21, sandwiching the display area AA from both sides in the X-axis direction. The gate circuit units 13 are for supplying scanning signals to gate wiring 26, which will be described later, and are provided monolithically on the array substrate 21.

[0017] The liquid crystal panel 10 according to this embodiment has both a display function for displaying images and a touch panel function for detecting a position (input position) at which a user inputs information based on the displayed image. A touch panel pattern for achieving the touch panel function is integrated (in-cell) into the liquid crystal panel 10. The touch panel pattern is a so-called projected capacitance type, and its detection method is a self-capacitance type. As shown in FIG. 1 , the touch panel pattern is composed of a plurality of touch electrodes (position detection electrodes) 30 arranged in a matrix on the main surface of the liquid crystal panel 10. The touch electrodes 30 are arranged in a display area AA of the liquid crystal panel 10. Therefore, the display area AA of the liquid crystal panel 10 substantially coincides with a touch area (position input area) where an input position can be detected. The non-display area NAA substantially coincides with a non-touch area (non-position input area) where an input position cannot be detected. Based on the image displayed in the display area AA of the liquid crystal panel 10, when a user brings a position input object, such as a conductive finger or a touch pen operated by the user, close to the surface (display surface) of the liquid crystal panel 10, capacitance is formed between the position input object and the touch electrode 30. As a result, the capacitance detected at the touch electrode 30 near the position input object changes as the position input object approaches, and becomes different from the capacitance of the touch electrode 30 farther from the position input object. Based on this difference in capacitance, a detection circuit, which will be described later, can detect the input position.

[0018] As shown in Fig. 1, a plurality of touch electrodes 30 are arranged in the display area AA along the X-axis direction and the Y-axis direction at intervals. The touch electrodes 30 are substantially rectangular in plan view, with each side measuring approximately several mm. The size of the touch electrodes 30 in plan view is much larger than that of the pixels PX described below, and they are arranged in an area spanning a plurality of pixels PX (approximately several tens to several hundreds) in the X-axis direction and the Y-axis direction. The detailed configuration of the touch electrodes 30 will be described later.

[0019] As shown in FIG. 1 , a plurality of touch wirings (position detection wirings) 31 provided on the liquid crystal panel 10 are selectively connected to the plurality of touch electrodes 30. The touch wirings 31 extend generally along the Y-axis direction. One end of each touch wiring 31 in the Y-axis direction is connected to the driver 11 in the non-display area NAA. The other end of each touch wiring 31 in the Y-axis direction is connected to a specific touch electrode 30 among the plurality of touch electrodes 30 arranged along the Y-axis direction in the display area AA. The touch wiring 31 is formed in a limited area along the Y-axis direction from the driver 11 to the touch electrode 30 to be connected, and is not disposed on the opposite side (upper side of FIG. 1) of the touch electrode 30 to the driver 11 side (lower side of FIG. 1). Note that in FIG. 1 , the connection points (first contact holes CH1) of the touch wiring 31 to the touch electrodes 30 are indicated by black circles. The touch wiring 31 is further connected to a detection circuit. The detection circuit may be provided in the driver 11 or may be provided outside the liquid crystal panel 10 via the flexible substrate 12. The detailed configuration of the touch wiring 31 will be explained later.

[0020] As shown in FIG. 1, a plurality of dummy wirings (connection wirings) 32 provided on the liquid crystal panel 10 are connected to the plurality of touch electrodes 30. The dummy wirings 32 extend generally along the Y-axis direction, similar to the touch wirings 31. The dummy wirings 32 are arranged so as to overlap the touch electrodes 30 to be connected, and their formation range in the Y-axis direction is limited to the same formation range of the touch electrodes 30 to be connected. The dummy wirings 32 are connected to the touch electrodes 30 to be connected at a plurality of locations. Note that in FIG. 1, the connection locations (second contact holes CH2) of the dummy wirings 32 to the touch electrodes 30 are indicated by black circles. Such dummy wirings 32 reduce the resistance distribution of the touch electrodes 30.

[0021] The pixel arrangement in the display area AA of the array substrate 21 will be described with reference to FIG. 2. In FIG. 2, the configuration of the array substrate 21, which includes the first metal film, the semiconductor film, the second metal film, and the first transparent electrode film, is shown with different hatching. In FIG. 2, the configuration of the second transparent electrode film and the configuration of the counter substrate 20 are shown with two-dot chain lines. The above-mentioned films of the array substrate 21 will be described in detail later. As shown in FIG. 2, on the inner surface of the display area AA of the array substrate 21, a plurality of TFTs (thin film transistors, switching elements) 23 and pixel electrodes 24 are arranged side by side at intervals within the main surface of the array substrate 21. The plurality of TFTs 23 and pixel electrodes 24 are arranged side by side in a matrix (row and column) at intervals in the X-axis direction and the Y-axis direction. Gate wiring (scanning wiring) 26 and source wiring (image wiring, signal wiring) 27 are arranged in a grid pattern around the TFTs 23 and the pixel electrodes 24. The gate wiring 26 extends substantially linearly along the X-axis direction, and multiple gate wirings are arranged side by side at intervals in the Y-axis direction to sandwich the pixel electrodes 24. The line width of the gate wiring 26 varies depending on the position in the X-axis direction. One end of each of the multiple gate wirings 26 in the X-axis direction is connected to the gate circuit unit 13. The source wiring 27 extends substantially along the Y-axis direction while repeatedly bending in a zigzag pattern. Multiple source wirings 27 are arranged side by side at intervals to sandwich the pixel electrodes 24 in the X-axis direction. The gate wiring 26 and the source wiring 27 intersect with each other. One end of each of the multiple source wirings 27 in the Y-axis direction is connected to the driver 11.

[0022] As shown in FIG. 2 , the touch wiring 31 is arranged to overlap a specific source wiring 27 among the multiple source wirings 27 in a planar view. Like the source wirings 27, the touch wiring 31 is repeatedly bent in a zigzag pattern and extends generally along the Y-axis direction. The dummy wiring 32 is arranged to overlap a source wiring 27 among the multiple source wirings 27 that does not overlap with the touch wiring 31 or a portion of the source wiring 27 that does not overlap with the touch wiring 31 in a planar view. Like the source wirings 27, the dummy wiring 32 is repeatedly bent in a zigzag pattern and extends generally along the Y-axis direction. The line widths (dimensions in the X-axis direction) of the touch wiring 31 and the dummy wiring 32 are approximately equal to the line width of the source wiring 27, and overlap the source wiring 27 over almost the entire width. Each TFT 23 is arranged to be sandwiched in the Y-axis direction between the pixel electrode 24 and the gate wiring 26 connected to it. The plurality of TFTs 23 include those located on the right side of the source wiring 27 to be connected in FIG. 2 and those located on the left side of the same figure. The TFTs 23 located on the right side of the source wiring 27 to be connected in FIG. 2 and the TFTs 23 located on the left side of the same figure are alternately arranged in pairs in the Y-axis direction. All of the TFTs 23 are located below the pixel electrode 24 to be connected in FIG. 2.

[0023] As shown in FIG. 2, the pixel electrode 24 has a pixel electrode body 24A that is approximately rectangular and vertically elongated in plan view. The long sides of the pixel electrode body 24A extend along the source wiring 27. Specifically, both longitudinal edges of the pixel electrode body 24A are slightly inclined with respect to the Y-axis direction. The pixel electrode 24 also has a contact portion 24B that protrudes to one side along the Y-axis direction from the pixel electrode body 24A. The contact portion 24B protrudes from the pixel electrode body 24A toward the TFT 23 to be connected (downward in FIG. 2) and is disposed so as to overlap most of the drain electrode 23C of the TFT 23. The contact portion 24B is the portion of the pixel electrode 24 that is connected to the drain electrode 23C (see FIG. 9).

[0024] The common electrode 25 and the touch electrode 30 provided on the array substrate 21 will be described with reference to FIGS. 1 and 3. In FIG. 3, a configuration consisting of a second transparent electrode film provided on the array substrate 21 is illustrated by a hatched pattern. As shown in FIG. 3, the array substrate 21 is provided with a common electrode 25 arranged across almost the entire display area AA. The common electrode 25 is arranged below all of the pixel electrodes 24 and overlaps them. As shown in FIG. 1, the common electrode 25 constitutes the touch electrode 30 described above. The common electrode 25 has partition openings (partition slits) 25A that separate adjacent touch electrodes 30. The partition openings 25A include a first partition opening 25A1 that extends generally along the X-axis direction and crosses the entire length of the common electrode 25, and a second partition opening 25A2 that extends generally along the Y-axis direction and crosses the entire length of the common electrode 25, forming a generally lattice-like shape in a plan view as a whole. The common electrode 25 is divided by partition openings 25A in a substantially grid pattern in a plan view to form a plurality of electrically independent touch electrodes 30. A common potential signal related to the image display function and a touch signal (position detection signal) related to the touch panel function are supplied from the driver 11 to the touch wirings 30 connected to such touch electrodes 30 in a time-division manner. The timing when the common potential signal is supplied from the driver 11 to the touch wirings 31 is the display period, and the timing when the touch signal is supplied from the driver 11 to the touch wirings 31 is the sensing period (position detection period). This common potential signal is transmitted to all touch wirings 31 at the same timing (display period), so that all touch electrodes 30 become a reference potential based on the common potential signal and function as common electrodes 25.

[0025] As shown in FIG. 3 , each of the plurality of touch electrodes 30 constituting the common electrode 25 is provided with a slit 30A that overlaps with the touch wiring 31 and the dummy wiring 32 (source wiring 27). Like the source wiring 27 and the dummy wiring 32, the slit 30A is repeatedly bent in a zigzag pattern and extends generally along the Y-axis direction. By providing the slit 30A in the touch electrode 30 in this manner, it is possible to reduce the parasitic capacitance that occurs between the touch wiring 31 and the touch electrode 30 that is not connected to the touch wiring 31. The length (dimension in the Y-axis direction) of the slit 30A is shorter than the length of the touch wiring 31 and the dummy wiring 32, and is set to a size that spans, for example, two pixel electrodes 24 aligned in the Y-axis direction. A plurality of the slits 30A are arranged with a gap in the Y-axis direction for one touch wiring 31 or one dummy wiring 32. Therefore, the touch electrode 30 has a remaining portion 30B that remains sandwiched between two slits 30A aligned with a gap in the Y-axis direction. The remaining portions 30B are arranged side by side in the Y-axis direction at intervals equal to the length of the slits 30A. The remaining portions 30B are arranged side by side with the TFTs 23 in the X-axis direction and overlap the gate wiring 26. The remaining portions 30B connect adjacent portions of the touch electrode 30 in the X-axis direction across the slits 30A by the remaining portions 30B. In this way, the remaining portions 30B prevent the touch electrode 30 from being divided into multiple portions in the X-axis direction. Each of the multiple touch electrodes 30 has an opening 30C formed therein that overlaps with the drain electrode 23C of the TFT 23 (near a third contact hole CH3 and a fourth contact hole CH4, which will be described later). A plurality of openings 30C are formed in the touch electrode 30 at positions that overlap with each drain electrode 23C of the multiple TFTs 23. The openings 30C prevent the touch electrode 30 from being short-circuited with the pixel electrode 24.

[0026] The cross-sectional structure of a pixel electrode 24 in the liquid crystal panel 10 near the center in the Y-axis direction will be described using Figure 4. As shown in Figure 4, the liquid crystal panel 10 has a liquid crystal layer (medium layer) 22 disposed between a pair of substrates 20, 21 and containing liquid crystal molecules, which are a substance whose optical properties change when an electric field is applied. A common electrode 25 is formed above the pixel electrodes 24 on the inner surface of the display area AA of the array substrate 21, overlapping all of the pixel electrodes 24. The common electrode 25 has a plurality of pixel slits 25B at positions overlapping each pixel electrode 24. The pixel slits 25B extend parallel to the long sides (outer shapes) of each pixel electrode 24, and a plurality of pixel slits 25B are arranged side by side at intervals in the X-axis direction at positions overlapping each pixel electrode 24. The common electrode 25 is supplied with a common potential signal (reference potential signal) of a common potential (reference potential) except during a period (sensing period) during which a touch signal (position detection signal) is supplied and the input position of a position input device is detected. The common electrode 25 extends across almost the entire display area AA. When a potential difference occurs between the overlapping pixel electrodes 24 and the common electrode 25 as the pixel electrodes 24 are charged, a fringe electric field (oblique electric field) including a component normal to the surface of the array substrate 21 in addition to a component along the main surface of the array substrate 21 is generated between the opening edge of the pixel slit 25B in the common electrode 25 and the pixel electrode 24. Therefore, the orientation state of the liquid crystal molecules contained in the liquid crystal layer 22 can be controlled by utilizing this fringe electric field. In other words, the liquid crystal panel 10 according to this embodiment operates in a fringe field switching (FFS) mode.

[0027] As shown in FIG. 4, the display area AA on the inner surface side of the counter substrate 20 constituting the liquid crystal panel 10 is provided with color filters 28 of three colors, blue (B), green (G), and red (R). The color filters 28 of different colors are arranged side by side in the extension direction (X-axis direction) of the gate wiring 26. The color filters 28 of different colors extend along the extension direction (roughly the Y-axis direction) of the source wiring 27. In this manner, the color filters 28 of different colors are arranged in a striped pattern as a whole. These color filters 28 are arranged to overlap with each pixel electrode 24 on the array substrate 21 side in a plan view, and together with the pixel electrode 24, form a pixel, which is a display unit. The color filters 28 of different colors are arranged so that their boundaries (color boundaries) overlap with the source wiring 27 (touch wiring 31 and dummy wiring 32). The inner surface of the counter substrate 20 is provided with a light-shielding portion (inter-pixel light-shielding portion, black matrix) 29 located below the color filter 28. The light-shielding portion 29 is made of a light-shielding material with excellent light-shielding properties. The light-shielding portion 29 can block light emitted from a backlight device or the like. In the display area AA, the light-shielding portion 29 has a generally lattice-like planar shape and separates adjacent pixel electrodes 24 (pixels). The light-shielding portion 29 is arranged to overlap at least the gate wiring 26 and the source wiring 27 on the array substrate 21 side in a planar view. An overcoat film 33 is provided on the upper layer side (liquid crystal layer 22 side) of the color filter 28, covering almost the entire area of ​​the counter substrate 20 for planarization. An alignment film is formed on the innermost surface (top layer) of each of the substrates 20 and 21, which contacts the liquid crystal layer 22, to align the liquid crystal molecules contained in the liquid crystal layer 22.

[0028] Next, the connection structure between the touch electrode 30 and the touch wiring 31 will be described with reference to FIG. 5. As shown in FIG. 5, the touch wiring 31 is arranged below the touch electrode 30 via a second interlayer insulating film 37 and a third interlayer insulating film 38, which will be described later. A first contact hole CH1 is formed in the second interlayer insulating film 37 and the third interlayer insulating film 38 at a position where the second interlayer insulating film 37 and the third interlayer insulating film 38 overlap both the touch wiring 31 and the touch electrode 30 to which the touch wiring 31 is to be connected, and the first contact hole CH1 is opened and communicates with the touch wiring 31. The touch wiring 31 and the touch electrode 30 are connected to each other through the first contact hole CH1. The first contact hole CH1 is arranged near the intersection of the gate wiring 26 and the source wiring 27.

[0029] Here, various films laminated on the inner surface side of the array substrate 21 will be described with reference to FIG. 9. FIG. 9 is a cross-sectional view of the array substrate 21 near the TFT 23. As shown in FIG. 9, the array substrate 21 is laminated with, in order from the lower layer side (glass substrate side), a first metal film, a gate insulating film 34, a semiconductor film, a second metal film (first conductive film), a first interlayer insulating film (first insulating film) 35, a planarization film (first insulating film) 36, a third metal film (second conductive film), a second interlayer insulating film (second insulating film) 37, a first transparent electrode film (third conductive film), a third interlayer insulating film (third insulating film) 38, a second transparent electrode film (fourth conductive film), and an alignment film. The first metal film, the second metal film, and the third metal film are each a single layer film made of one type of metal material selected from copper, titanium, aluminum, molybdenum, tungsten, etc., or a layered film or alloy made of different types of metal materials, thereby providing electrical conductivity and light-blocking properties. The first metal film constitutes the gate wiring 26, the gate electrode 23A of the TFT 23, etc. The second metal film constitutes the source wiring 27, the source electrode 23B and the drain electrode 23C of the TFT 23, etc. The third metal film constitutes the touch wiring 31 and the dummy wiring 32, etc. The semiconductor film is made of a thin film using a material such as an oxide semiconductor or amorphous silicon, and constitutes the semiconductor section 23D of the TFT 23, etc. The first transparent electrode film and the second transparent electrode film are made of a transparent electrode material (such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide)). The first transparent electrode film constitutes the pixel electrode 24, etc. The second transparent electrode film constitutes the common electrode 25 (touch electrode 30), etc. The alignment film is as described above.

[0030] The gate insulating film 34, the first interlayer insulating film 35, the second interlayer insulating film 37, and the third interlayer insulating film 38 are each made of silicon nitride (SiN xThe planarization film 36 is made of an inorganic material such as silicon dioxide (SiO2). The planarization film 36 is made of an organic material such as PMMA (acrylic resin). The planarization film 36 has a thickness of, for example, about 1 μm to 3 μm, which is much thicker than the gate insulating film 34, the first interlayer insulating film 35, the second interlayer insulating film 37, and the third interlayer insulating film 38. The planarization film 36 flattens the inner surface of the array substrate 21 (the surface facing the liquid crystal layer 22). The gate insulating film 34 keeps the first metal film on the lower layer insulated from the semiconductor film and second metal film on the upper layer insulated from each other. For example, the intersection of the gate wiring 26 made of the first metal film and the source wiring 27 made of the second metal film is kept insulated by the gate insulating film 34. In the TFT 23, the overlapping portion of the gate electrode 23A made of the first metal film and the semiconductor portion 23D made of the semiconductor film is kept insulated by the gate insulating film 34. The first interlayer insulating film 35 and the planarizing film 36 insulate the semiconductor film and second metal film on the lower layer from the third metal film on the upper layer. For example, the overlapping portion of the source wiring 27 made of the second metal film and the touch wiring 31 or dummy wiring 32 made of the third metal film is kept insulated by the first interlayer insulating film 35 and the planarizing film 36. The second interlayer insulating film 37 insulates the third metal film on the lower layer from the first transparent electrode film on the upper layer. For example, the touch wiring 31 and dummy wiring 32 made of the third metal film are kept insulated from the pixel electrode 24 made of the first transparent electrode film by the second interlayer insulating film 37. The third interlayer insulating film 38 insulates the first transparent electrode film on the lower layer from the second transparent electrode film on the upper layer. For example, the overlapping portion of the pixel electrode 24 made of the first transparent electrode film and the common electrode 25 (touch electrode 30) made of the second transparent electrode film is kept in an insulated state by the third interlayer insulating film .

[0031] Next, the cross-sectional configuration of the TFT 23 will be described. As shown in FIG. 9, the TFT 23 has a gate electrode 23A made of a first metal film. The gate electrode 23A is made of a part of the gate wiring 26 (near the intersection with the source wiring 27). The gate electrode 23A is formed by partially widening the gate wiring 26 (see FIG. 7). The gate electrode 23A drives the TFT 23 based on a scanning signal supplied to the gate wiring 26. The TFT 23 has a source electrode 23B made of a second metal film. The source electrode 23B is made of a part of the source wiring 27 (the intersection with the gate wiring 26). The source electrode 23B is disposed at one end of the TFT 23 in the X-axis direction (the left end shown in FIG. 9). The source electrode 23B overlaps a part of the gate electrode 23A and is connected to the semiconductor portion 23D.

[0032] As shown in FIG. 9 , the TFT 23 has a drain electrode 23C made of a second metal film. The drain electrode 23C is disposed at a position spaced apart from the source electrode 23B in the X-axis direction, i.e., at the other end of the TFT 23 in the X-axis direction (the right end shown in FIG. 9 ). An end of the drain electrode 23C on the source electrode 23B side is disposed so as to overlap with a portion of the gate electrode 23A and is connected to the semiconductor portion 23D. An end of the drain electrode 23C opposite to the source electrode 23B side is connected to the pixel electrode 24. An intermediate electrode 39 made of a third metal film is provided at a position overlapping both the drain electrode 23C and the pixel electrode 24 (contact portion 24B described later). The intermediate electrode 39 is located midway between the drain electrode 23C and the pixel electrode 24 in the Z-axis direction. The intermediate electrode 39 has an island shape and is physically separated from the touch wiring 31 and dummy wiring 32, which are made of other portions of the same third metal film. A third contact hole CH3 is formed in the first interlayer insulating film 35 and the planarizing film 36, which are interposed between the drain electrode 23C and the intermediate electrode 39, at a position overlapping the drain electrode 23C and the intermediate electrode 39. The intermediate electrode 39 is connected to the drain electrode 23C through the third contact hole CH3. A fourth contact hole CH4 is formed in the second interlayer insulating film 37 and the third interlayer insulating film 38, which are interposed between the intermediate electrode 39 and the pixel electrode 24, at a position overlapping the intermediate electrode 39 and the pixel electrode 24. The pixel electrode 24 is connected to the intermediate electrode 39 through the fourth contact hole CH4. In this way, the pixel electrode 24 is connected to the drain electrode 23C via the intermediate electrode 39.

[0033] As shown in FIG. 9 , the TFT 23 has an island-shaped semiconductor portion 23D including a channel portion. The semiconductor portion 23D has a horizontally elongated shape extending along the X-axis direction. The semiconductor portion 23D overlaps the gate electrode 23A via the gate insulating film 34. One end of the semiconductor portion 23D is connected to the source electrode 23B. The other end of the semiconductor portion 23D is connected to the drain electrode 23C. A portion of the semiconductor portion 23D that overlaps with the gate electrode 23A but does not overlap with the source electrode 23B and the drain electrode 23C is a channel portion that functions as a channel (current path). A portion of the semiconductor portion 23D that overlaps with the source electrode 23B and the drain electrode 23C is a portion that does not function as a channel. When the TFT 23 is turned on based on a scanning signal supplied to the gate electrode 23A, an image signal (data signal) supplied to the source line 27 is supplied from the source electrode 23B to the drain electrode 23C via the semiconductor portion 23D. As a result, the pixel electrode 24 is charged to a potential based on the image signal.

[0034] Next, the relationship between the driver 11, the touch electrodes 30, the source wirings 27, the touch wirings 31, and the dummy wirings 32 will be described with reference to FIG. 6 . FIG. 6 shows, as representatives, the touch electrode 30 closest to the driver 11 and the touch electrode 30 farthest from the driver 11 among the plurality of touch electrodes 30 arranged along the Y-axis direction. Note that in FIG. 6 , the source wirings 27 overlapping the touch wirings 31 and the dummy wirings 32 are shown adjacent to the touch wirings 31 and the dummy wirings 32 on the right side of FIG. 6 . First, in the liquid crystal panel 10 according to this embodiment, as shown in FIG. 6 , the number of touch wirings 31 installed is smaller than the number of source wirings 27 installed. Therefore, the plurality of source wirings 27 includes source wirings 27 that do not overlap with the touch wirings 31. Dummy wirings 32 are arranged to overlap the source wirings 27 that do not overlap with the touch wirings 31. Specifically, a plurality of touch wirings 31 are arranged in a central portion of the touch electrode 30 in the X-axis direction, while a plurality of dummy wirings 32 are arranged at both end portions of the touch electrode 30 in the X-axis direction. Note that the plurality of dummy wirings 32 arranged at one end portion of the touch electrode 30 in the X-axis direction have one end short-circuited to each other, and similarly, the plurality of dummy wirings 32 arranged at the other end portion of the touch electrode 30 in the X-axis direction have one end short-circuited to each other. In this embodiment, two touch wirings 31 are connected to one touch electrode 30. The two touch wirings 31 connected to the same touch electrode 30 are bundled together at a position (non-display area NAA) where they are drawn from the display area AA to the driver 11 side.

[0035] As shown in FIG. 6 , the touch wiring 31 is formed in a limited range in the Y-axis direction from the driver 11 to the touch electrode 30 to which it is connected, and is not arranged on the opposite side of the touch electrode 30 to the driver 11 in the Y-axis direction (upper side in FIG. 6 ) from the touch electrode 30 to which it is connected. That is, most of the multiple touch wirings 31, except for the one connected to the touch electrode 30 farthest from the driver 11, are not arranged so as to overlap the source wiring 27 over the entire length. Of the source wirings 27 partially overlapped with the touch wiring 31, dummy wirings 32 are arranged so as to overlap the part of the source wiring 27 opposite the driver 11 in the Y-axis direction from the touch electrode 30 to which the touch wiring 31 is connected. Therefore, the number of dummy wirings 32 connected to the multiple touch electrodes 30 arranged along the Y-axis direction tends to increase as the electrodes are farther from the driver 11 in the Y-axis direction. Furthermore, among the multiple touch electrodes 30 arranged along the Y-axis direction, the touch electrodes 30 closer to the driver 11 in the Y-axis direction tend to have a larger number of touch wirings 31 that are overlapping but not connected than the touch electrodes 30 farther from the driver 11.

[0036] 6, of the plurality of touch electrodes 30 arranged along the Y-axis direction, the touch electrode 30 closest to the driver 11 is referred to as the "first touch electrode (third electrode) 30α," and the touch electrode 30 farthest from the driver 11 is referred to as the "second touch electrode (fifth electrode) 30β." Furthermore, of the plurality of touch wirings 31, the touch wiring 31 connected to the second touch electrode 30β is referred to as the "first touch wiring (second wiring) 31α," and the touch wiring 31 connected to the first touch electrode 30α is referred to as the "second touch wiring (fourth wiring) 31β." Furthermore, of the plurality of source wirings 27, the source wiring 27 overlapping with the first touch wiring 31α is referred to as the "first source wiring (first wiring) 27α," and the source wiring 27 overlapping with the second touch wiring 31β is referred to as the "second source wiring (third wiring) 27β." 6 is referred to as a "first slit 30Aα," and the slit 30A located on the upper side of FIG. 6 is referred to as a "second slit 30Aβ." Of the multiple TFTs 23 connected to the first source wiring 27α, the TFT 23 aligned in the X-axis direction with the first slit 30Aα in the first touch electrode 30α is referred to as a "first TFT (first switching element) 23α," the TFT 23 aligned in the X-axis direction with the remaining portion 30B in the first touch electrode 30α is referred to as a "second TFT (second switching element) 23β," and the TFT 23 connected to a pixel electrode 24 (a third pixel electrode 24γ described next) overlapping with the second touch electrode 30β is referred to as a "third TFT (third switching element) 23γ." Furthermore, among the multiple pixel electrodes 24, the pixel electrode 24 connected to the first TFT 23α is referred to as the "first pixel electrode (first electrode) 24α," the pixel electrode 24 connected to the second TFT 23β is referred to as the "second pixel electrode (second electrode) 24β," and the pixel electrode 24 connected to the third TFT 23γ is referred to as the "third pixel electrode (fourth electrode) 24γ." The first pixel electrode 24α and the second pixel electrode 24β overlap with the first touch electrode 30α.

[0037] Next, the relationship between the first source wiring 27α, the TFT 23 connected to the first source wiring 27α, the pixel electrode 24 connected to the TFT 23, the first touch electrode 30α, and the first touch wiring 31α will be described with reference to FIGS. 7 to 12. FIGS. 7 and 8 are enlarged plan views of the vicinity of the first TFT 23α adjacent to the first slit 30Aα provided in the first touch electrode 30α. FIG. 9 is a cross-sectional view of the vicinity of the first TFT 23α adjacent to the first slit 30Aα provided in the first touch electrode 30α. FIGS. 10 and 11 are enlarged plan views of the vicinity of the second TFT 23β adjacent to the remaining portion 30B provided in the first touch electrode 30α. FIG. 12 is a cross-sectional view of the vicinity of the second TFT 23β adjacent to the remaining portion 30B provided in the first touch electrode 30α. 7 and 10, the configuration consisting of the first metal film, the semiconductor film, the second metal film, and the first transparent electrode film provided on the array substrate 21 is shown in different hatched areas. In Fig. 8 and 11, the configuration consisting of the second transparent electrode film provided on the array substrate 21 is shown in hatched areas.

[0038] As shown in FIGS. 8 and 11 , the slits 30A (first slits 30Aα and second slits 30Aβ) provided in the first touch electrode 30α have a width dimension (dimension in the X-axis direction) larger than the width dimension of the touch wiring 31 (the source wiring 27 and the dummy wiring 32). The slits 30A are arranged concentrically with the touch wiring 31 in the X-axis direction. Therefore, both side edges of the slit 30A are arranged with a gap in the X-axis direction from both side edges of the touch wiring 31. In this way, the slit 30A is formed wider than the touch wiring 31 so as to include a first region A1 overlapping with the touch wiring 31 and two second regions A2 not overlapping with the touch wiring 31. In this way, the parasitic capacitance generated between the touch wiring 31 and the touch electrode 30 can be further reduced.

[0039] 7 and 10, the signal transmitted through the first source wiring 27α is supplied to the first pixel electrode 24α when the first TFT 23α is driven, and is supplied to the second pixel electrode 24β when the second TFT 23β is driven. An electric field corresponding to a potential difference is generated between the first pixel electrode 24α and the second pixel electrode 24β, which overlap each other via the third interlayer insulating film 38, and the first touch electrode 30α, as shown in FIGS. 9 and 12. This electric field can be utilized to display an image. The first touch electrode 30α is provided with the first slit 30Aα and the second slit 30Aβ, which extend along the Y-axis direction and overlap a portion of the first touch wiring 31α. This reduces the parasitic capacitance generated between the first touch wiring 31α made of the third metal film and the first touch electrode 30α made of the second transparent electrode film. As shown in Figure 11, the first touch electrode 30α has a remaining portion 30B that remains between the first slit 30Aα and the second slit 30Aβ in the Y-axis direction, thereby preventing the first touch electrode 30α from being divided into multiple parts by the first slit 30Aα and the second slit 30Aβ.

[0040] On the other hand, near the first slit 30Aα and the second slit 30Aβ of the first touch electrode 30α, the electric field generated between the first source line 27α and the first touch electrode 30α is relatively weak as shown in Fig. 9, whereas near the remaining portion 30B of the first touch electrode 30α, the electric field generated between the first source line 27α and the first touch electrode 30α tends to be relatively strong as shown in Fig. 12. For this reason, there is a concern that a difference will occur between the potential of the first pixel electrode 24α charged based on the signal supplied from the first source line 27α to the first pixel electrode 24α via the first TFT 23α and the potential of the second pixel electrode 24β charged based on the signal supplied from the first source line 27α to the second pixel electrode 24β via the second TFT 23β.

[0041] Therefore, as shown in FIGS. 7 to 12, the first pixel electrode 24α provided in the array substrate 21 according to this embodiment has a first overlapping portion 40 that overlaps at least a portion of the first slit 30Aα, and the second pixel electrode 24β has a second overlapping portion 41 that overlaps at least a portion of the remaining portion 30B. As shown in FIGS. 7 and 8, the first pixel electrode 24α having the first overlapping portion 40 is arranged so as to be aligned with the first slit 30Aα provided in the first touch electrode 30α in the X-axis direction but not aligned with the remaining portion 30B in the X-axis direction. The first overlapping portion 40 is formed by widening the contact portion 24B of the first pixel electrode 24α. In other words, the first overlapping portion 40 selectively overlaps with a portion of the first slit 30Aα extending generally along the Y-axis direction that is aligned with the contact portion 24B of the first pixel electrode 24α in the X-axis direction. The first overlapping portion 40 is arranged to overlap with the second region A2 located on the first TFT 23α side (the right side in FIGS. 7 and 8) of the first region A1 of the first slit 30Aα. That is, as shown in FIGS. 7 to 9, the first overlapping portion 40 is positioned so as to fill the space between the first touch wiring 31α and the side edge of the first slit 30Aα in the X-axis direction. The first overlapping portion 40 is arranged so as not to overlap with the first touch wiring 31α (first source wiring 27α). 7 to 9 illustrate a configuration in which the first TFT 23α is arranged on the right side of the first source wiring 27α in FIGS. 7 to 9. However, for example, if the first TFT 23α is arranged on the left side of the first source wiring 27α in FIGS. 2 and 3, as shown in FIGS. 2 and 3, the first overlapping portion 40 will be arranged to overlap with a portion of the second region A2 located on the first TFT 23α side (left side of FIGS. 1 and 2) of the first region A1 of the first slit 30Aα.

[0042] As shown in FIGS. 10 and 11 , the second pixel electrode 24β having the second overlapping portion 41 is arranged to be aligned in the X-axis direction with the remaining portion 30B of the first touch electrode 30α. The second overlapping portion 41 is formed by widening the contact portion 24B of the second pixel electrode 24β. The second overlapping portion 41 is configured so that its formation range in the Y-axis direction spans the slit 30A and the remaining portion 30B. More specifically, the second overlapping portion 41 is arranged to span a part of the slit 30A located on the upper side of the two slits 30A that sandwich the remaining portion 30B in FIGS. 10 and 11 and a part of the remaining portion 30B. The second overlapping portion 41 is arranged to overlap a part of the remaining portion 30B on the second TFT 23β side in the X-axis direction (the right side in FIGS. 10 and 11 ). The second overlapping portion 41 is arranged to overlap a part of the second region A2 located on the second TFT 23β side of the first region A1 of the slit 30A. That is, the second overlapping portion 41 is positioned so as to fill the space between the first touch wiring 31α and the side edge of the slit 30A in the X-axis direction, as shown in Figures 10 to 12. The second overlapping portion 41 is arranged so as not to overlap with the first touch wiring 31α (first source wiring 27α). 10 to 12 illustrate a configuration in which the second TFT 23β is arranged on the right side of the first source wiring 27α in FIGS. 7 to 9. However, for example, if the second TFT 23β is arranged on the left side of the first source wiring 27α in FIGS. 2 and 3 as shown in FIGS. 2 and 3, the second overlapping portion 41 will be arranged to overlap the portion of the remaining portion 30B on the second TFT 23β side in the X-axis direction (the right side in FIGS. 10 and 11) and a portion of the second region A2 located on the second TFT 23β side of the first region A1 in the slit 30A.

[0043] In this way, since the first pixel electrode 24α has the first overlapping portion 40 and the second pixel electrode 24β has the second overlapping portion 41, an electric field that may be generated between the first source line 27α and the first touch electrode 30α near the first slit 30Aα in the first touch electrode 30α can be shielded by the first overlapping portion 40, and an electric field that may be generated between the first source line 27α and the first touch electrode 30α near the remaining portion 30B of the first touch electrode 30α can be shielded by the second overlapping portion 41. This makes it difficult for a difference to occur between the potential of the first pixel electrode 24α and the potential of the second pixel electrode 24β, and as a result, display unevenness is less likely to be visible. Furthermore, by being formed wider than the first touch wiring 31α, even if the first slit 30Aα includes the second region A2 in addition to the first region A1, the first overlapping portion 40 of the first pixel electrode 24α is arranged overlapping the second region A2, so that the electric field that may occur between the first source wiring 27α and the first touch electrode 30α can be effectively shielded by the first overlapping portion 40.

[0044] As shown in FIG. 6 , the first touch wiring 31α is not connected to the first touch electrode 30α but is connected to the second touch electrode 30β, which is located farther from the driver 11 in the Y-axis direction than the first touch electrode 30α. Therefore, the first touch wiring 31α crosses the first touch electrode 30α, which is located closer to the driver 11 in the Y-axis direction than the second touch electrode 30β. Therefore, a parasitic capacitance occurs between the first touch wiring 31α and the first touch electrode 30α, which is not connected to the first touch wiring 31α. In this regard, the first touch electrode 30α is provided with the first slit 30Aα and the second slit 30Aβ, which effectively reduces the parasitic capacitance occurring between the first touch wiring 31α and the first touch electrode 30α. In contrast, the first touch wiring 31α and the second touch electrode 30β are connected and have the same potential, so there is no need to provide a slit 30A in the portion of the second touch electrode 30β that overlaps with the first touch wiring 31α.

[0045] On the other hand, as shown in FIG. 6, the second touch wiring 31β is connected to the first touch electrode 30α, which is disposed closer to the driver 11 in the Y-axis direction than the second touch electrode 30β. In this way, the second touch wiring 31β is connected to the first touch electrode 30α, and therefore does not cross the second touch electrode 30β. Therefore, the second touch electrode 30β does not have a slit 30A that overlaps with the second touch wiring 31β. In this way, the first touch electrode 30α and the second touch electrode 30β have different configurations due to their positional relationship with the driver 11, and therefore a difference is likely to occur between the electric field that can be generated between the first source wiring 27α and the first touch electrode 30α and the electric field that can be generated between the second source wiring 27β and the second touch electrode 30β. In this regard, the first pixel electrode 24α and the second pixel electrode 24β overlapping the first touch electrode 30α have the first overlapping portion 40 and the second overlapping portion 41, respectively, and the electric field that may occur between the first source line 27α and the first touch electrode 30α is shielded, thereby mitigating the difference that may occur between the electric field that may occur between the first source line 27α and the first touch electrode 30α and the electric field that may occur between the second source line 27β and the second touch electrode 30β. This makes it difficult to visually recognize display unevenness between the first touch electrode 30α and the second touch electrode 30β.

[0046] As described above, the array substrate (display substrate) 21 of this embodiment is made of the second metal film (first conductive film), and includes the first source wiring (first wiring) 27α extending along the first direction, the first TFT (first switching element) 23α connected to the first source wiring 27α, the second TFT (second switching element) 23β connected to the first source wiring 27α, and the third metal film (second conductive film) disposed above the second metal film via the first interlayer insulating film 35 and the planarizing film 36, which are the first insulating film. a first touch wiring (second wiring) 31α arranged so as to overlap with the wiring 27α; a first pixel electrode (first electrode) 24α consisting of a first transparent electrode film (third conductive film) arranged on the upper layer side with respect to the third metal film via a second interlayer insulating film (second insulating film) 37 and connected to the first TFT 23α; a second pixel electrode (second electrode) 24β consisting of a part of the first transparent electrode film separate from the first pixel electrode 24α and connected to the second TFT 23β; and a second transparent electrode film (fourth electrode) 24β arranged on the upper layer side with respect to the first transparent electrode film via a third interlayer insulating film (third insulating film) 38. and a first touch electrode (third electrode) 30α made of a conductive film and arranged to overlap the first pixel electrode 24α and the second pixel electrode 24β, wherein the first touch electrode 30α includes a first slit 30Aα extending along the first direction and arranged to overlap a part of the first touch wiring 31α, a second slit 30Aβ extending along the first direction and arranged to overlap a part of the first touch wiring 31α and arranged at an interval in the first direction from the first slit 30Aα, and a second slit 30Aβ arranged to overlap a part of the first touch wiring 31α and arranged at an interval in the first direction from the first slit 30Aα. The first pixel electrode 24α has a first overlapping portion 40 that overlaps at least a portion of the first slit 30Aα, and a remaining portion 30B that remains between the first slit 30Aα and the second slit 30Aβ in the second direction, the first pixel electrode 24α is aligned with the first slit 30Aα in the second direction intersecting the first direction but is not aligned with the remaining portion 30B in the second direction, and the second pixel electrode 24β is aligned with the remaining portion 30B in the second direction and has a second overlapping portion 41 that overlaps at least a portion of the remaining portion 30B.

[0047] A signal transmitted through the first source wiring 27α is supplied to the first pixel electrode 24α when the first TFT 23α is driven, and is supplied to the second pixel electrode 24β when the second TFT 23β is driven. An electric field corresponding to a potential difference is generated between the first pixel electrode 24α and the second pixel electrode 24β, which overlap each other via the third interlayer insulating film 38, and the first touch electrode 30α, and an image can be displayed using the electric field. The first touch electrode 30α is provided with the first slit 30Aα and the second slit 30Aβ, which extend along the first direction and overlap a portion of the first touch wiring 31α, thereby reducing parasitic capacitance generated between the first touch wiring 31α made of the third metal film and the first touch electrode 30α made of the second transparent electrode film. Since the first touch electrode 30α has a remaining portion 30B that remains between the first slit 30Aα and the second slit 30Aβ in the first direction, the first touch electrode 30α is prevented from being divided into multiple parts by the first slit 30Aα and the second slit 30Aβ.

[0048] On the other hand, near the first slit 30Aα and the second slit 30Aβ of the first touch electrode 30α, the electric field generated between the first source line 27α and the first touch electrode 30α tends to be relatively weak, whereas near the remaining portion 30B of the first touch electrode 30α, the electric field generated between the first source line 27α and the first touch electrode 30α tends to be relatively strong. For this reason, there is a concern that a difference will occur between the potential of the first pixel electrode 24α, which is charged based on the signal supplied from the first source line 27α to the first pixel electrode 24α via the first TFT 23α, and the potential of the second pixel electrode 24β, which is charged based on the signal supplied from the first source line 27α to the second pixel electrode 24β via the second TFT 23β. In this regard, the first pixel electrode 24α, which is aligned with the first slit 30Aα in the second direction but not aligned with the remaining portion 30B in the second direction, has a first overlapping portion 40 that overlaps at least a portion of the first slit 30Aα, and the second pixel electrode 24β, which is aligned with the remaining portion 30B in the second direction, has a second overlapping portion 41 that overlaps at least a portion of the remaining portion 30B. Therefore, an electric field that may be generated between the first source line 27α and the first touch electrode 30α near the first slit 30Aα in the first touch electrode 30α can be shielded by the first overlapping portion 40, and an electric field that may be generated between the first source line 27α and the first touch electrode 30α near the remaining portion 30B of the first touch electrode 30α can be shielded by the second overlapping portion 41. This makes it difficult for a difference to occur between the potential of the first pixel electrode 24α and the potential of the second pixel electrode 24β, resulting in less visible display unevenness.

[0049] Furthermore, the first touch electrode 30α is formed wider than the first touch wiring 31α so that the first slit 30Aα includes a first region A1 overlapping the first touch wiring 31α and a second region A2 not overlapping the first touch wiring 31α, and the first overlapping portion 40 is arranged to overlap at least the second region A2 of the first slit 30Aα. By forming the first slit 30Aα wider than the first touch wiring 31α so as to include the second region A2 in addition to the first region A1, the parasitic capacitance generated between the first touch wiring 31α and the first touch electrode 30α can be further reduced. In this way, even if the first slit 30Aα is configured to include the second region A2, the first overlapping portion 40 of the first pixel electrode 24α is arranged overlapping the second region A2, so that the electric field that may occur between the first source wiring 27α and the first touch electrode 30α can be effectively shielded by the first overlapping portion 40.

[0050] The display device also includes a third TFT (third switching element) 23γ connected to the first source wiring 27α, a third pixel electrode (fourth electrode) 24γ formed of a portion of the first transparent electrode film separate from the first pixel electrode 24α and the second pixel electrode 24β and connected to the third TFT 23γ, and a second touch electrode (fifth electrode) 30β formed of a portion of the second transparent electrode film separate from the first touch electrode 30α and arranged to overlap the third pixel electrode 24γ, where the first touch wiring 31α is connected to the second touch electrode 30β. A signal transmitted by the first touch wiring 31α is supplied to the second touch electrode 30β. Although parasitic capacitance occurs between the first touch wiring 31α and the first touch electrode 30α that is not connected to the first touch wiring 31α, the first slit 30Aα and the second slit 30Aβ provided in the first touch electrode 30α can effectively reduce the parasitic capacitance.

[0051] The display device further includes a second source wiring (third wiring) 27β consisting of a portion of the second metal film separate from the first source wiring 27α and extending along the first direction, a second touch wiring (fourth wiring) 31β consisting of a portion of the third metal film separate from the first touch wiring 31α and extending along the first direction and arranged so as to overlap the second source wiring 27β, and a driver (signal supplier) 11 connected to one end of the first source wiring 27α and the second source wiring 27β and supplying signals to the first source wiring 27α and the second source wiring 27β, respectively, wherein the second touch electrode 30β is arranged farther from the driver 11 in the first direction than the first touch electrode 30α, and the second touch wiring 31β is connected to the first touch electrode 30α. The first touch wiring 31α is connected to the second touch electrode 30β, which is arranged farther from the driver 11 in the first direction than the first touch electrode 30α, and therefore crosses the first touch electrode 30α. Although the first touch wiring 31α and the first touch electrode 30α are not connected, the first touch electrode 30α is provided with a first slit 30Aα and a second slit 30Aβ that overlap the first touch wiring 31α, thereby reducing the parasitic capacitance that occurs between the first touch wiring 31α and the first touch electrode 30α. In contrast, the first touch wiring 31α and the second touch electrode 30β are connected and have the same potential, so there is no need to provide a slit 30A in the portion of the second touch electrode 30β that overlaps the first touch wiring 31α. Meanwhile, the second touch wiring 31β is connected to the first touch electrode 30α, which is positioned closer to the driver 11 in the first direction than the second touch electrode 30β, and therefore does not cross the second touch electrode 30β. Therefore, the second touch electrode 30β does not have a slit 30A that overlaps the second touch wiring 31β. As such, since the first touch electrode 30α and the second touch electrode 30β have different configurations due to their positional relationship with the driver 11, a difference is likely to occur between the electric field that can occur between the first source wiring 27α and the first touch electrode 30α and the electric field that can occur between the second source wiring 27β and the second touch electrode 30β.In this regard, the first pixel electrode 24α and the second pixel electrode 24β overlapping the first touch electrode 30α have the first overlapping portion 40 and the second overlapping portion 41, respectively, and the electric field that may occur between the first source line 27α and the first touch electrode 30α is shielded, thereby mitigating the difference that may occur between the electric field that may occur between the first source line 27α and the first touch electrode 30α and the electric field that may occur between the second source line 27β and the second touch electrode 30β. This makes it difficult to visually recognize display unevenness between the first touch electrode 30α and the second touch electrode 30β.

[0052] Furthermore, the liquid crystal panel (display device) 10 according to this embodiment includes the above-described array substrate 21 and a counter substrate 20 disposed opposite to and spaced apart from the array substrate 21. With the liquid crystal panel 10 configured in this manner, display unevenness is less likely to be visually recognized.

[0053] <Other embodiments> The technology disclosed in this specification is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included in the technical scope.

[0054] (1) The touch electrode 30 may be configured such that the width of the slit 30A varies depending on the position in the Y-axis direction. For example, the width of the slit 30A near the TFT 23 may be larger than the width of the slit 30A near the pixel electrode body 24A. When the width of the slit 30A varies depending on the position in the Y-axis direction, the second region A2 of the slit 30A may be partially unformed depending on the position in the Y-axis direction.

[0055] (2) The touch electrode 30 may have a configuration in which the slit 30A includes one first region A1 and one second region A2. That is, the slit 30A may be unevenly distributed on one side of the touch wiring 31 in the X-axis direction.

[0056] (3) The specific arrangement of the touch wiring 31 and the dummy wiring 32 relative to the touch electrode 30 can be changed as appropriate to other arrangements than those shown in the drawings. For example, the touch wiring 31 may be unevenly distributed on one side of the touch electrode 30 in the X-axis direction, and the dummy wiring 32 may be unevenly distributed on the other side.

[0057] (4) One touch wiring 31 may be connected to one touch electrode 30, or three or more touch wirings 31 may be connected to one touch electrode 30.

[0058] (5) The source line 27 and the touch line 31 do not have to have the same width.

[0059] (6) The specific number, shape, and area of ​​the pixel slits 25B provided in the common electrode 25 can be appropriately changed to other than those shown in the drawings.

[0060] (7) The plurality of TFTs 23 may be arranged in an alternating fashion in the Y-axis direction, with TFTs 23 arranged on one side of the source wiring 27 to be connected in the X-axis direction and TFTs 23 arranged on the other side of the source wiring 27 to be connected in the X-axis direction. Alternatively, all of the TFTs 23 may be arranged on one side or the other side of the source wiring 27 to be connected in the X-axis direction.

[0061] (8) The planar patterns of the gate wiring 26 and the source wiring 27 (touch wiring 31 and dummy wiring 32) can be changed as appropriate. For example, the gate wiring 26 may not extend linearly, but may extend obliquely and bend repeatedly along the way. The source wiring 27 may extend linearly along the Y-axis direction. Neither the gate wiring 26 nor the source wiring 27 may extend linearly, but may extend obliquely and bend repeatedly along the way. Neither the gate wiring 26 nor the source wiring 27 may extend linearly.

[0062] (9) It is also possible to omit the gate circuit unit 13. In that case, a gate driver having the same function as the gate circuit unit 13 may be mounted on the array substrate 21. It is also possible to provide the gate circuit unit 13 on only one side of the array substrate 21.

[0063] (10) The material of the semiconductor film that constitutes the semiconductor portion 23D may be polysilicon (LTPS) or the like.

[0064] (11) The touch panel pattern may be a mutual capacitance type other than a self-capacitance type.

[0065] (12) The structure of the TFT 23 may be a top gate type, a double gate type, or the like, other than the bottom gate type shown in the drawing.

[0066] (13) The planar shape of the liquid crystal panel 10 may be a vertically long rectangle, a square, a circle, a semicircle, an oval, an ellipse, a trapezoid, or the like.

[0067] (14) The liquid crystal panel 10 may be a reflective or semi-transmissive type in addition to a transmissive type.

[0068] (15) The display panel may be of a type other than the liquid crystal panel 10 (such as an organic EL (Electro Luminescence) display panel) or an EPD (microcapsule electrophoretic display panel). [Explanation of symbols]

[0069] 10...liquid crystal panel (display device), 11...driver (signal supply unit), 20...counter substrate, 21...array substrate (display substrate), 23α...first TFT (first switching element), 23β...second TFT (second switching element), 23γ...third TFT (third switching element), 24α...first pixel electrode (first electrode), 24β...second pixel electrode (second electrode), 24γ...third pixel electrode (fourth electrode), 27α...first source wiring (first wiring), 27β...second source wiring (third wiring), 30α...first touch electrode (third electrode), 30Aα...first slit, 30Aβ...second slit, 30B...remaining portion, 30β...second touch electrode (fifth electrode), 31α...first touch wiring (second wiring), 31β...second touch wiring (fourth wiring), 35...first interlayer insulating film (first insulating film), 36...planarization film (first insulating film), 37...second interlayer insulating film (second insulating film), 38...third interlayer insulating film (third insulating film), 40...first overlapping portion, 41...second overlapping portion, A1...first region, A2...second region

Claims

1. a first wiring made of a first conductive film and extending along a first direction; a first switching element connected to the first wiring; a second switching element connected to the first wiring; a second wiring made of a second conductive film disposed on an upper layer side of the first conductive film via a first insulating film, extending along the first direction and overlapping the first wiring; a first electrode made of a third conductive film disposed above the second conductive film with a second insulating film interposed therebetween, the first electrode being connected to the first switching element; a second electrode formed of a portion of the third conductive film separate from the first electrode and connected to the second switching element; a third electrode made of a fourth conductive film disposed above the third conductive film with a third insulating film interposed therebetween, the third electrode being disposed to overlap the first electrode and the second electrode; the third electrode has: a first slit extending along the first direction and arranged so as to overlap a portion of the second wiring; a second slit extending along the first direction and arranged so as to overlap a portion of the second wiring and arranged at a distance from the first slit in the first direction; and a remaining portion arranged so as to overlap a portion of the second wiring and remaining between the first slit and the second slit in the first direction, the first electrode is arranged so as to be aligned with the first slit in a second direction intersecting the first direction but not aligned with the remaining portion in the second direction, and has a first overlapping portion that overlaps at least a portion of the first slit; The second electrode is arranged to be aligned with the remaining portion in the second direction, and has a second overlapping portion that overlaps at least a part of the remaining portion.

2. the third electrode is formed to be wider than the second wiring so that the first slit includes a first region overlapping the second wiring and a second region not overlapping the second wiring; The display substrate according to claim 1 , wherein the first overlapping portion is arranged to overlap at least the second region of the first slit.

3. a third switching element connected to the first wiring; a fourth electrode formed of a portion of the third conductive film separate from the first electrode and the second electrode and connected to the third switching element; a fifth electrode formed of a portion of the fourth conductive film separate from the third electrode and disposed so as to overlap the fourth electrode, 3. The display substrate according to claim 1, wherein the second wiring is connected to the fifth electrode.

4. a third wiring formed of a portion of the first conductive film different from the first wiring and extending along the first direction; a fourth wiring formed of a portion of the second conductive film different from the second wiring, extending along the first direction, and arranged so as to overlap the third wiring; a signal supply unit connected to one end of each of the first wiring and the third wiring and supplying a signal to each of the first wiring and the third wiring, the fifth electrode is disposed at a position farther from the signal supply unit in the first direction than the third electrode; The display substrate according to claim 3 , wherein the fourth wiring is connected to the third electrode.

5. The display substrate according to claim 1 or 2; a counter substrate disposed opposite the display substrate with a gap therebetween.

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