Active matrix substrate, in-cell touch panel and display device

Abstract

Provided are an active matrix substrate, an In-cell touch panel, and a display device with which it is possible to prevent the occurrence of display unevenness and to increase the number of touch detection lines. The active matrix substrate (1) has a plurality of source lines (14a) and a plurality of touch detection lines (30). Each of the plurality of touch detection lines (30) includes, at a position overlapping one of the plurality of source lines (14a), a first portion (31) extending along the source line (14a) and a second portion (32) disposed at a position not overlapping the plurality of source lines (14a), and the second portions of adjacent touch detection lines are alternately arranged side by side in a direction extending along the source line (14a).

Description

Technical Field

[0001] The present disclosure relates to an active matrix substrate, an In-cell touch panel, and a display device. Background Art

[0002] The In-cell touch panel of Patent Document 1 has a double-gate structure. In other words, in this In-cell touch panel, at each boundary portion between two adjacent pixels in the column direction, two gate lines are provided, and the gate lines extend in the row direction. In addition, data lines extending in the column direction and touch detection lines extending in the column direction are alternately arranged in the row direction. In addition, the data lines and the touch detection lines are respectively arranged at the boundary portions between two adjacent pixels in the row direction. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Patent Laid-Open No. 2020-140075 Summary of the Invention Technical Problem to be Solved by the Invention

[0004] In the In-cell touch panel described in Patent Document 1 above, when the number of touch detection electrodes is increased to achieve high-resolution touch detection, the number of touch detection lines increases. When the number of touch detection lines is the same as the number of data lines, the data lines and the touch detection lines can be alternately arranged. When the number of touch detection lines is more than the number of data lines, touch detection lines are also arranged at positions overlapping the data lines. Therefore, a difference occurs between the capacitance of the touch detection lines arranged at positions overlapping the data lines and the capacitance of the touch detection lines arranged at positions not overlapping the data lines. Due to this capacitance difference, a deviation occurs in the potentials of multiple touch detection electrodes (the potentials of multiple common electrodes). Since a deviation occurs in the potentials of multiple touch detection electrodes, uneven display occurs in the In-cell touch panel.

[0005] Therefore, the present disclosure is completed to solve the above technical problems, and an object thereof is to provide an active matrix substrate, an In-cell touch panel, and a display device that can prevent uneven display from occurring and increase the number of touch detection lines. Solution to the Problem

[0006] In order to solve the above problems, the active matrix substrate according to the first aspect of the present disclosure has a plurality of pixel regions arranged in a matrix in a first direction and a second direction intersecting the first direction, and the active matrix substrate includes: a plurality of gate lines extending in the first direction, arranged in the second direction, and formed in a gate line layer; a plurality of source lines extending in the second direction, arranged in the first direction, and formed in a source wiring layer; a plurality of touch detection lines each connected to each of the plurality of touch detection electrodes and arranged in the first direction, at least a part of the plurality of touch detection lines being formed in a touch detection wiring layer, and each of the plurality of touch detection lines having: a first part at a position overlapping any one of the plurality of source lines, the first part extending in the second direction and formed in the touch detection wiring layer; a second part at a position not overlapping the plurality of source lines, extending in the second direction; and a third part connecting the first part and the second part, and the second parts of one of the plurality of touch detection lines and a touch detection line adjacent to the one of the plurality of touch detection lines in the first direction are alternately arranged side by side in the second direction.

[0007] In addition, the In-cell touch panel according to the first aspect includes: the active matrix substrate according to the first aspect; and a plurality of touch detection electrodes arranged on the active matrix substrate.

[0008] In addition, the display device according to the third aspect includes: the active matrix substrate according to the first aspect; and a counter substrate arranged opposite to the active matrix substrate. Advantageous Effects of the Invention

[0009] According to the above configuration, it is possible to prevent uneven display and increase the number of touch detection lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 FIG. is a cross-sectional view schematically showing the configuration of the In-cell touch panel 100 in the first embodiment. Figure 2 FIG. is a cross-sectional view schematically showing the configuration of the active matrix substrate 1 in the first embodiment. Figure 3 FIG. is a top view for explaining the arrangement of the touch detection electrodes 16a. Figure 4 FIG. is a circuit diagram for explaining the configuration of the pixel region 22 formed on the active matrix substrate 1. Figure 5 FIG. is a diagram for explaining the configuration of the touch detection line 30. Figure 6 This is a diagram for explaining the arrangement position of the black matrix 40. Figure 7 This is a diagram showing the configuration of the In-cell touch panel 200 according to the second embodiment. Figure 8 This is a diagram showing the configuration of the In-cell touch panel 300 according to the third embodiment. Figure 9 This is a diagram showing the configuration of the In-cell touch panel 400 according to the fourth embodiment. Figure 10 This is a diagram showing the configuration of the In-cell touch panel 500 according to the fifth embodiment. Figure 11 This is a diagram showing the configuration of the In-cell touch panel 600 according to the sixth embodiment. Figure 12 This is a diagram showing the configuration of the In-cell touch panel 700 according to the seventh embodiment. Figure 13 This is a diagram showing the configuration of the In-cell touch panel 800 according to the eighth embodiment. Detailed Embodiments

[0011] Hereinafter, embodiments of the present disclosure will be described based on the drawings. In addition, the present disclosure is not limited to the following embodiments, and design changes can be appropriately made within the scope that satisfies the configuration of the present disclosure. In the following description, the same reference numerals are commonly used among different drawings for the same parts or parts having the same functions, and repeated descriptions thereof are appropriately omitted. In addition, the respective configurations described in the embodiments and modification examples can be appropriately combined or changed within the scope not departing from the gist of the present disclosure. In the drawings referred to below, in order to make the description easy to understand, the configuration is simplified or schematically shown, or a part of the constituent components is omitted. In addition, the dimensional ratios between the constituent components shown in each drawing do not necessarily represent the actual dimensional ratios.

[0012] [First Embodiment] Figure 1 This is a cross-sectional view schematically showing the configuration of the In-cell touch panel 100 in the first embodiment. Figure 2 This is a cross-sectional view schematically showing the configuration of the active matrix substrate 1 in the first embodiment.

[0013] The In-cell (embedded type) touch panel 100 is, for example, a liquid crystal display device of the transverse electric field type. As Figure 1As shown, the in-cell touch panel 100 is a display device including an active matrix substrate 1, a counter substrate 2, and a liquid crystal layer 3. The liquid crystal layer 3 is disposed between the active matrix substrate 1 and the counter substrate 2.

[0014] As Figure 2 shown, in the active matrix substrate 1, a substrate 10, a gate line layer 11, a gate insulating layer 12a, a semiconductor layer 13, a source line layer 14, a first insulating layer 12b, a planarization layer 12e, a touch detection line layer 15, a second insulating layer 12c, a common electrode layer 16, a third insulating layer 12d, and a pixel electrode layer 17 are sequentially stacked. The gate line layer 11, the source line layer 14, and the touch detection line layer 15 include a metal material such as copper or aluminum. The gate insulating layer 12a, the first insulating layer 12b, the second insulating layer 12c, and the third insulating layer 12d are made of an insulator including an inorganic material or an organic material. The planarization layer 12e is made of a photosensitive organic material. The common electrode layer 16 and the pixel electrode layer 17 are made of a transparent conductive film such as ITO (Indium Tin Oxide) or a mesh-like metal film.

[0015] Figure 3 is a top view for explaining the arrangement of the touch detection electrodes 16a. On the active matrix substrate 1, a plurality of touch detection electrodes 16a formed in the common electrode layer 16 (see Figure 2 ) are formed. The plurality of touch detection electrodes 16a are respectively disposed to face a plurality of pixel electrodes 17a arranged in a matrix in the normal direction of the active matrix substrate 1. The plurality of touch detection electrodes 16a are arranged in a matrix in the X direction and the Y1 direction. A driver including a touch detection circuit 21 is mounted on the active matrix substrate 1. The plurality of touch detection electrodes 16a are respectively connected to the touch detection circuit 21 via touch detection lines 30. The touch detection circuit 21 supplies a drive signal to each of the touch detection electrodes 16a of the plurality of touch detection electrodes 16a, obtains a detection signal from each of the touch detection electrodes 16a of the plurality of touch detection electrodes 16a, and performs a touch detection process in which, based on the detection signal, it is determined whether there is a touch by an indicator (the position of the touch). The touch detection circuit 21 performs the touch detection process and the display process in a time-division manner. The display process performed by the touch detection circuit 21 means applying a common prescribed potential to the plurality of touch detection electrodes 16a via the touch detection lines 30, that is, a common potential that is a reference for the potential supplied to the pixel electrodes 17a when the liquid crystal in the liquid crystal layer 3 operates.

[0016] Here, Figure 3The right direction (row direction) on the paper surface is set as the X1 direction, and the opposite direction is set as the X2 direction. In addition, the direction orthogonal to the X1 direction along the surface of the active matrix substrate 1 is set as the Y1 direction, and the opposite direction is set as the Y2 direction. Further, the normal direction of the active matrix substrate 1 is set as the Z1 direction, and the opposite direction is set as the Z2 direction.

[0017] Figure 4 is a circuit diagram for explaining the configuration of the pixel region 22 formed on the active matrix substrate 1. As Figure 4 shown, on the active matrix substrate 1, a plurality of gate lines 11a extending in the X1 direction, a plurality of gate lines 11b, and a plurality of source lines 14a extending in the Y1 direction are formed. The plurality of gate lines 11a and the plurality of gate lines 11b are formed in the gate line layer 11. The plurality of source lines 14a are formed in the source line layer 14.

[0018] The pixel region 22 is a region where the pixel electrode 17a is disposed and is a region that substantially contributes to display. The gate line 11a is disposed at a position in the Y1 direction with respect to the pixel region 22, and the gate line 11b is disposed at a position in the Y2 direction with respect to the pixel region 22. In addition, the gate lines 11a and 11b are disposed between two pixel regions 22 adjacent in the Y1 direction. That is, in the first embodiment, a dual-gate driving method is adopted in which two gate lines are used to drive the pixel regions 22 in one row. The pixel region 22 connected to the gate line 11a is set as the pixel region 22a. In addition, the pixel region 22 connected to the gate line 11b is set as the pixel region 22b. The pixel regions 22a and 22b are alternately arranged in the X direction. In addition, the source line 14a is disposed between the pixel regions 22a and 22b adjacent in the X1 direction. The source line 14a is disposed at a position in the X2 direction with respect to the pixel region 22a and at a position in the X1 direction with respect to the pixel region 22b. Also, the source line 14a is not disposed at a position in the X1 direction with respect to the pixel region 22a, and the source line 14a is not disposed at a position in the X2 direction with respect to the pixel region 22b. One source line 14a is provided for each of the pixel regions 22a and 22b (a 2-row and 2-column pixel region). In the following description, when the pixel regions 22a and 22b are not distinguished, they are described as the pixel region 22.

[0019] As Figure 4As shown, a transistor 23 is disposed between two pixel regions 22 adjacent in the Y1 direction. The transistor 23 includes a gate electrode 23a, a source electrode 23b, and a drain electrode 23c. The gate electrode 23a is formed in the gate line layer 11. In addition, the gate electrode 23a is connected to the gate line 11a or the gate line 11b. The source electrode 23b is formed in the source line layer 14. In addition, the source electrode 23b is connected to the source line 14a. The drain electrode 23c is formed in the source line layer 14. In addition, the drain electrode 23c is connected to the pixel electrode 17a via a pixel contact hole 17c formed in the first insulating layer 12b, the planarization layer 12e, the second insulating layer 12c, and the third insulating layer 12d. The pixel contact hole 17c includes a first pixel contact hole formed in the first insulating layer 12b and the planarization layer 12e and a second pixel contact hole formed in the second insulating layer 12c and the third insulating layer 12d. An island-shaped electrode formed by the touch detection line layer 15 is disposed between the first pixel contact hole and the second pixel contact hole. In addition, an opening of the touch detection electrode 16a is formed at a position overlapping the pixel contact hole 17c in a top view. The drain electrode 23c is connected to the island-shaped electrode via the first pixel contact hole, and the island-shaped electrode is connected to the pixel electrode 17a via the second pixel contact hole. A semiconductor portion 23d (see Figure 5 ) is provided in the transistor 23.

[0020] The pixel electrode 17a includes a plurality of slits 17b formed in the pixel electrode layer 17 and extending along the source line 14a. The touch detection electrode 16a is a common electrode disposed opposite to the pixel electrodes 17a provided on each of the plurality of pixel regions 22. A gate driving circuit 24 and a source driving circuit 25 are disposed on the active matrix substrate 1. The gate driving circuit 24 sequentially supplies gate signals to the plurality of gate lines 11a and 11b. The source driving circuit 25 supplies source signals to the plurality of source lines 14a. The gate driving circuit 24 is formed monolithically on the substrate 10 using the same film-forming material as the transistor 23 connected to the pixel electrode 17a. The source driving circuit 25 is included in a driver mounted on the substrate 10, and the source driving circuit 25 may also be included in the same driver as the driver including the touch detection circuit 21 (see Figure 2 ). When a gate signal that turns on the transistor 23 is input to the gate electrode 23a, the transistor 23 supplies a source signal from the source line 14a to the pixel electrode 17a and updates (rewrites) the potential of the pixel electrode 17a. The pixel electrode 17a generates an electric field between itself and the touch detection electrode 16a via the plurality of slits 17b formed in the pixel electrode 17a, thereby causing the liquid crystal in the liquid crystal layer 3 to act and causing the In-cell touch panel 100 to display an image.

[0021] Figure 3The touch detection line 30 shown is connected to the touch detection electrode 16a. The touch detection line 30 is formed in the touch detection line layer 15 via a contact hole 16b formed in the second insulating layer 12c (see Figure 2 ). The contact hole 16b may have at least one for each touch detection electrode 16a, but may also have a plurality. In the case of having a plurality of contact holes 16b, redundancy is improved, and in addition, the resistance distribution within the touch detection electrode 16a can be reduced.

[0022] Figure 5 FIG. is a diagram for explaining the configuration of the touch detection line 30. As Figure 5 shown, each of the plurality of touch detection lines 30 includes a first portion 31, a second portion 32, and a third portion 33. The first portion 31 is a portion that extends in the Y1 direction at a position overlapping one of the plurality of source lines 14a with the first insulating layer 12b and the planarization layer 12e interposed therebetween. The first portion 31 is disposed between the pixel region 22a and the pixel region 22b. "Extending in the Y1 direction" includes extending in a direction parallel to the Y1 direction, as Figure 5 shown, and also includes extending in a state having an angle with respect to the Y1 direction. The second portion 32 is a portion that extends in the Y1 direction at a position not overlapping the plurality of source lines 14a. The first portion 31 is disposed at a position in the X1 direction with respect to the pixel region 22a and at a position in the X2 direction with respect to the pixel region 22b. The second portion 32 is disposed at a position in the X1 direction with respect to the pixel region 22b and at a position in the X2 direction with respect to the pixel region 22a. In the first embodiment, since the active matrix substrate 1 is configured for dual-gate driving, an area where no source line is disposed is generated between a plurality of adjacent pixel regions 22 in the X1 direction. Thus, the second portion 32 can be disposed in this area. As a result, the second portion 32 does not overlap with the pixel region 22, and therefore, light intended to pass through the pixel region 22 can be prevented from being blocked by the second portion 32. In addition, as Figure 5 shown, the number of touch detection lines 30 is twice the number of source lines 14a.

[0023] The third portion 33 is a portion connecting the first portion 31 and the second portion 32. The third portion 33 extends in the X1 direction. In addition, the third portion 33 is disposed at a position overlapping the gate line 11b with the gate insulating layer 12a, the first insulating layer 12b, and the planarization layer 12e interposed therebetween. In addition, the third portion 33 is disposed between two adjacent pixel regions 22 in the Y1 direction. In addition, as Figure 3 shown, the third portion 33 is disposed between two adjacent touch detection electrodes 16a in the Y1 direction.

[0024] In the first embodiment, as Figure 5As shown, the first part 31 and the second part 32 are respectively provided in the plurality of touch detection lines 30. Moreover, the second part 32 of one of the plurality of touch detection lines 30 and the second part 32 of the touch detection line 30 adjacent to the one of the plurality of touch detection lines 30 in the X direction are alternately arranged side by side in the Y direction. Thus, even when the number of the plurality of touch detection lines 30 is increased, there is no portion where only a specific touch detection line among the plurality of touch detection lines 30 overlaps with the source line 14a, and the plurality of touch detection lines 30 respectively include a portion overlapping with the source line 14a and a portion not overlapping with the source line 14a. Therefore, only in the specific touch detection line, the capacitance formed between the source line 14a does not increase, and the difference between the capacitance of the one of the plurality of touch detection lines 30 and the capacitance of the other touch detection lines 30 adjacent to the one of the plurality of touch detection lines 30 in the X1 direction can be reduced, so that the capacitance deviation of the plurality of touch detection lines 30 can be suppressed. As a result, it is possible to suppress potential variation among the plurality of touch detection electrodes 16 a , thereby preventing display unevenness from occurring in the in-cell touch panel 100 .

[0025] like Figure 3 As shown, each of the plurality of touch detection lines 30 further includes: a fourth portion 34 formed on an extension line of the first portion 31 in the Y1 direction, and a fifth portion 35 connecting the fourth portion 34 and the second portion 32. The fifth portion 35 extends in the X2 direction from the second portion 32 toward the fourth portion 34. The fifth portion 35 is disposed between two touch detection electrodes 16a adjacent to each other in the Y1 direction, and overlaps with the gate line 11b via the gate insulating layer 12a, the first insulating layer 12b, and the planarizing layer 12e, similarly to the third portion 33. Figure 3 As shown, on the touch detection line 30 , the touch detection line 30 is arranged so as to extend in the Y1 direction while meandering in the X1 direction and the X2 direction.

[0026] Figure 6 4 is a diagram for explaining the configuration position of the black matrix 40. Figure 6 As shown, a black matrix 40 is provided on the counter substrate 2. The black matrix 40 is a light shielding component. The black matrix 40 is arranged between the plurality of pixel regions 22, overlapping with the semiconductor portion 23d of the transistor 23 and the pixel contact hole 17c. In addition, any part of the first part 31 to the fifth part 35 in the touch detection line 30 is arranged at a position overlapping with the black matrix 40. Thus, the touch detection line 30 can be prevented from affecting the display.

[0027] [Second embodiment] Next, refer to Figure 7, the configuration of the In-cell touch panel 200 based on the second embodiment will be described. In the second embodiment, dummy lines 250 are arranged at positions overlapping with the second portion 232 of the touch detection lines 230. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment and their description is omitted. Further, the "dummy lines 250" are an example of the "conductor lines" of the present disclosure.

[0028] Figure 7 FIG. is a diagram showing the configuration of the In-cell touch panel 200 based on the second embodiment. The In-cell touch panel 200 includes an active matrix substrate 201. The active matrix substrate 201 includes dummy lines 250 extending in the Y1 direction. The dummy lines 250 are conductor lines different from the plurality of source lines 14a, and the dummy lines 250 are conductor lines formed in the source line layer 14 (see Figure 2 ). The dummy lines 250 are arranged at positions in the X2 direction with respect to the pixel region 22a and at positions in the X1 direction with respect to the pixel region 22b. The dummy lines 250 refer to conductor lines that are not connected to the source driver circuit 25 (see Figure 4 ), or to which source signals are not supplied from the source driver circuit 25. That is, the dummy lines 250 are conductor lines that do not function as source lines. A common potential is supplied to the dummy lines 250, for example.

[0029] As Figure 7 shown, the touch detection lines 230 include: a first portion 231 arranged at a position overlapping with the source line 14a; a second portion 232 arranged at a position not overlapping with the source line 14a; and a third portion 233 connecting the first portion 231 and the second portion 232. The dummy lines 250 are arranged at positions overlapping with the second portion 232 of the touch detection lines 230. Therefore, the first portion 231 of the touch detection lines 230 overlaps with the source line 14a, and the second portion 232 overlaps with the dummy lines 250. Here, in the first embodiment, there are cases where the difference between the capacitance formed by the first portion 31 overlapping with the source line 14a and the capacitance formed by the second portion 32 not overlapping with the source line 14a is large, and depending on the number, size, or position of the contact holes 16b of the touch detection electrodes 16a, there are cases where the difference between the capacitance of a certain touch detection line 30 and the capacitance of the touch detection line 30 adjacent to the certain touch detection line 30 becomes large. In the second embodiment, by providing the dummy lines 250 overlapping with the second portion 232, the capacitance formed by the second portion 232 can be adjusted, whereby the difference between the capacitance of the first portion 231 and the capacitance of the second portion 232 becomes small. In addition, the other configurations and effects of the second embodiment are the same as those of the first embodiment.

[0030] [Third Embodiment] Next, referring toFigure 8 , the configuration of the In-cell touch panel 300 based on the third embodiment will be described. In the third embodiment, the third portion 333 of the touch detection line 330 is disposed at a position overlapping the central portion 316a of the touch detection electrode 16a. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment and the description thereof is omitted.

[0031] Figure 8 FIG. is a diagram showing the configuration of the In-cell touch panel 300 based on the third embodiment. The In-cell touch panel 300 includes an active matrix substrate 301. The active matrix substrate 301 includes a touch detection line 330. The touch detection line 330 includes a first portion 331, a second portion 332, a third portion 333, a fourth portion 334, and a fifth portion 335. The first portion 331 and the fourth portion 334 are disposed at positions overlapping the source line 14a. The second portion 332 is disposed at a position not overlapping the source line 14a. The third portion 333 and the fifth portion 335 are disposed at positions overlapping the central portion 316a of the touch detection electrode 16a. The central portion 316a is the central portion of the touch detection electrode 16a in the Y1 direction. The third portion 333 and the fifth portion 335 are disposed, for example, at the central position in the Y1 direction of the touch detection electrode 16a. The central portion 316a is, for example, a region closer to the Y1 direction than the end portion in the Y2 direction of the touch detection electrode 16a and a region closer to the Y2 direction than the end portion in the Y1 direction of the touch detection electrode 16a. In addition, the third portion 333 and the fifth portion 335 are disposed between two adjacent pixel regions 22 in the Y1 direction, similarly to the third portion 33 of the first embodiment. According to the third embodiment, in the region overlapping the touch detection electrode 16a, the capacitances of a plurality of touch detection lines 330 can be made substantially equal. In addition, other configurations and effects of the third embodiment are the same as those of the first embodiment.

[0032] [Fourth Embodiment] Next, with reference to Figure 9 , the configuration of the In-cell touch panel 400 based on the fourth embodiment will be described. In the fourth embodiment, the third portions of the touch detection lines 430a to 430c are disposed at different positions in the Y1 direction. In addition, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment and the description thereof is omitted.

[0033] Figure 9FIG. 0 is a diagram showing the configuration of the In-cell touch panel 400 according to the fourth embodiment. The In-cell touch panel 400 includes an active matrix substrate 401. The active matrix substrate 401 includes touch detection lines 430a, 430b, and 430c. The touch detection line 430a includes third portions 433a and 435a. The touch detection line 430b includes third portions 433b and 435b. The touch detection line 430c includes third portions 433c and 435c.

[0034] As Figure 9 shown, the third portion 433a is arranged at a position in the Y1 direction with respect to the third portions 433b and 433c. The fifth portion 435a is arranged at a position in the Y1 direction with respect to the fifth portions 435b and 435c. In addition, the third portion 433b is arranged at a position in the Y1 direction with respect to the third portion 433c. The fifth portion 435b is arranged at a position in the Y1 direction with respect to the fifth portion 435c. That is, the third portions of the touch detection lines 430a to 430c are dispersedly arranged at mutually different positions in the Y1 direction. Here, in the third embodiment, similar to the third portion 33 and the fifth portion 35 of the first embodiment, when the third portion 333 or the fifth portion 335 overlaps with the gate line, the capacitance of a specific gate line, that is, the gate line overlapping with the third portion 333 or the fifth portion 335, becomes larger than that of other gate lines, and there may be a difference in the way the gate signal is passivated. At this time, there is a case where the display of a specific pixel region arranged in the row direction is inappropriate, and there is a case where it is visually recognized by the user as a horizontal line on the In-cell touch panel 400. As Figure 9 shown, by dispersing the third portions and the fifth portions of the touch detection lines 430a to 430c to different positions from each other in the Y1 direction, it is possible to prevent the capacitance difference of the gate line caused by the third portion from affecting the display. In addition, the other configurations and effects of the fourth embodiment are the same as those of the first embodiment.

[0035] [Fifth Embodiment] Next, with reference to Figure 10 , the configuration of the In-cell touch panel 500 according to the fifth embodiment will be described. In the fifth embodiment, a conductor line 550 connected to the second portion 532 is arranged at a position overlapping with the second portion 532 of the touch detection line 530. In addition, the same configurations as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment and the description thereof is omitted.

[0036] Figure 10FIG. 0 is a diagram showing the configuration of the In-cell touch panel 500 according to the fifth embodiment. The In-cell touch panel 500 includes an active matrix substrate 501. The active matrix substrate 501 includes conductor lines 550 extending in the Y1 direction. The conductor lines 550 are different from the plurality of source lines 14a, and the conductor lines 550 are formed in the source line layer 14 (see Figure 2 ). The conductor lines 550 are positioned in the X2 direction with respect to the pixel region 22a and in the X1 direction with respect to the pixel region 22b.

[0037] As Figure 10 shown, the touch detection line 530 includes: a first portion 531 disposed at a position overlapping with the source line 14a; a second portion 532 disposed at a position not overlapping with the source line 14a; and a third portion 533 connecting the first portion 531 and the second portion 532. The conductor lines 550 are disposed at a position overlapping with the second portion 532 of the touch detection line 530. Further, the conductor lines 550 are connected to the second portion 532 via contact holes 551 formed in the first insulating layer 12b and the planarization layer 12e. At least two contact holes 551 are provided corresponding to the second portion 532 respectively. Thereby, the resistance of the touch detection line 530 can be reduced. In addition, the conductor lines 550 can be used as redundant lines of the touch detection line 530, so that the redundancy of the In-cell touch panel 500 can be improved. In addition, other configurations and effects of the fifth embodiment are the same as those of the first embodiment.

[0038] [Sixth Embodiment] Next, with reference to Figure 11 , the configuration of the In-cell touch panel 600 according to the sixth embodiment will be described. In the sixth embodiment, the second portion 632 of the touch detection line 630 is formed in the source line layer 14. In addition, the same configurations as those in the first embodiment are denoted by the same reference numerals as in the first embodiment and the description thereof is omitted.

[0039] Figure 11 FIG. 18 is a diagram showing the configuration of the In-cell touch panel 600 according to the sixth embodiment. The In-cell touch panel 600 includes an active matrix substrate 601. The active matrix substrate 601 includes a touch detection line 630. The touch detection line 630 includes: a first portion 631 disposed at a position overlapping with the source line 14a; a second portion 632 disposed at a position not overlapping with the source line 14a; and a third portion 633 connecting the first portion 631 and the second portion 632. The second portion 632 is formed in the source line layer 14 (see Figure 2)。The second part 632 is connected to the third part 633 through a contact hole 632a formed in the first insulating layer 12b and the planarization layer 12e. In the first embodiment, a second insulating layer 12c is interposed between the second part 32 formed in the touch detection line layer 15 and the touch detection electrode 16a. In the sixth embodiment, a first insulating layer 12b, a planarization layer 12e, and a second insulating layer 12c are interposed between the second part 632 formed in the source line layer 14 and the touch detection electrode 16a. Therefore, the capacitance formed between the second part 632 and the touch detection electrode 16a can be reduced. In addition, the other configurations and effects of the sixth embodiment are the same as those of the first embodiment.

[0040] [Seventh Embodiment] Next, with reference to Figure 12 , the configuration of the In-cell touch panel 700 based on the seventh embodiment will be described. In the seventh embodiment, the active matrix substrate 701 is configured to be driven in a triple-gate manner. In addition, the same configurations as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment and will not be described.

[0041] Figure 12 FIG. is a diagram showing the configuration of the In-cell touch panel 700 based on the seventh embodiment. The In-cell touch panel 700 includes an active matrix substrate 701. The active matrix substrate 701 includes a pixel region 722 (pixel electrode), a source line 714a extending in the Y1 direction, gate lines 711a to 711c extending in the X1 direction and bent in a V shape between adjacent source lines 714a, and a touch detection line 730. In the seventh embodiment, the number of pixel regions 722 in each row is one-third of that in the first embodiment, and the number of pixel regions 722 in each column is three times that in the first embodiment. In addition, the number of source lines 714a is one-third of that in the eighth embodiment (single gate) described later, and the number of gate lines (gate lines 711a to 711c) is three times that in the eighth embodiment (single gate). That is, the active matrix substrate 701 is configured to be driven in a triple-gate manner.

[0042] In addition, as Figure 12As shown, in pixel region 722, the bent portion 722a, which is the central portion in the X1 direction, is arranged at the position closest to the Y1 direction. Also, in pixel region 722, the end portions in the X1 direction and the end portions in the X2 direction are arranged at positions in the Y2 direction with respect to the bent portion 722a. That is, the plurality of slits 717b formed in pixel region 722 (pixel electrode) and pixel electrode 717a are bent along gate lines 711a - 711c in the bent portion 722a in a top view. Further, a gate electrode 723a, a source electrode 723b, and a drain electrode 723c are arranged at positions in the X2 direction with respect to pixel region 722. Additionally, pixel electrode 717a and drain electrode 723c are connected via pixel contact hole 717c.

[0043] Touch detection line 730 includes: a first portion 731 arranged at a position overlapping with source line 714a; a second portion 732 arranged at a position not overlapping with source line 714a; and a third portion 733 connecting the first portion 731 and the second portion 732. The second portion 732 is arranged in the bent portion 722a. In a lateral electric field mode liquid crystal display device, the bent portion 722a is a boundary region where the directions of the electric fields that cause the liquid crystal in liquid crystal layer 3 to act are different from each other, and is a region with little contribution to display. By overlapping and arranging the second portion 732 on the bent portion 722a, a decrease in brightness can be prevented. Moreover, the second portion 732 of one touch detection line 730 among the plurality of touch detection lines 730 and the second portion 732 of the touch detection line 30 adjacent to one touch detection line 30 among the plurality of touch detection lines 730 in the X direction are alternately arranged side by side in the Y direction. According to the seventh embodiment, in the active matrix substrate 701 driven in a three - gate mode, both display unevenness can be prevented and the number of touch detection lines 730 can be increased. In addition, the other configurations and effects of the seventh embodiment are the same as those of the first embodiment.

[0044] [Eighth Embodiment] Next, with reference to Figure 13 , the configuration of the in - cell touch panel 800 based on the eighth embodiment will be described. In the eighth embodiment, the active matrix substrate 801 is configured to be driven in a single - gate mode. In addition, the same configurations as those in the first embodiment are denoted by the same reference numerals as in the first embodiment and the description thereof is omitted.

[0045] Figure 13FIG. 0 is a diagram showing the configuration of an In-cell touch panel 800 according to the eighth embodiment. The In-cell touch panel 800 includes an active matrix substrate 801. The active matrix substrate 801 includes a pixel region 822 (pixel electrode), a source line 814a extending in the Y1 direction, a gate line 811a extending in the X-axis direction, and a touch detection line 830. In the first embodiment, one row of pixel regions 22 is driven by two gate lines, while in the eighth embodiment, one row of pixel regions 822 is driven by one gate line 811a. In addition, in the first embodiment, one source line 14a is provided for each of two columns of pixel regions, but in the eighth embodiment, one source line 814a is provided for each of one column of pixel regions. That is, the active matrix substrate 801 is configured to be driven in a single-gate manner.

[0046] In addition, as Figure 13 shown, a gate electrode 823a, a source electrode 823b, and a drain electrode 823c are arranged at positions in the Y2 direction with respect to the pixel region 822. The pixel electrode 817a is connected to the drain electrode 823c via a pixel contact hole 817c. A plurality of slits 817b are provided in the pixel electrode 817a.

[0047] The touch detection line 830 includes: a first portion 831 disposed at a position overlapping the source line 814a; a second portion 832 disposed at a position not overlapping the source line 814a; and a third portion 833 connecting the first portion 831 and the second portion 832. A pixel electrode 817a is arranged in the pixel region 822. The second portion 832 is arranged at positions at substantially the same distance from each of two adjacent source lines 814a and overlapping the pixel electrode 817a. Moreover, the second portion 832 of one touch detection line 830 among a plurality of touch detection lines 830 and the second portion 832 of the touch detection line 30 adjacent to one touch detection line 830 among a plurality of touch detection lines 830 in the X direction are alternately arranged side by side in the Y direction. Thus, in the active matrix substrate 801 driven in a single-gate manner, it is possible to prevent display unevenness and increase the number of touch detection lines 830. In addition, the other configurations and effects of the eighth embodiment are the same as those of the first embodiment.

[0048] As described above, the embodiments have been described, but the above embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above embodiments, and can be appropriately modified and implemented within the scope not departing from the gist thereof.

[0049] (1) In the above first to eighth embodiments, an example is shown in which the first to third portions are provided in all the touch detection lines provided on the active matrix substrate, but the present disclosure is not limited thereto. That is, it is sufficient to provide the first to third portions in at least two touch detection lines among the touch detection lines provided on the active matrix substrate.

[0050] (2) Although an example is shown in which the above first to eighth embodiments are configured as a liquid crystal display device, the present disclosure is not limited thereto. For example, the above first to eighth embodiments can be configured as an electronic paper device (a display panel of a microcapsule type electrophoresis method), or the above first to fifth embodiments can be configured as an organic EL display device.

[0051] (3) In the above first to eighth embodiments, an example is given in which the fourth and fifth portions are provided in the touch detection lines, but the present disclosure is not limited thereto. That is, the touch detection line may be composed only of the first to third portions.

[0052] (4) In the above first to eighth embodiments, examples of the materials of the respective layers are shown, but the present disclosure is not limited thereto. For example, the touch detection line layer may be made of ITO.

[0053] (5) In the above first to eighth embodiments, an example is shown in which the third portion is arranged at a position overlapping the black matrix, but the present disclosure is not limited thereto. For example, the third portion may be arranged at a position overlapping the color filter, or both the color filter and the black matrix may be arranged at non-overlapping positions.

[0054] (6) In the above first to eighth embodiments, an example is shown in which the touch detection line layer 15, the second insulating layer 12c, the common electrode layer 16, the third insulating layer 12d, and the pixel electrode layer 17 are laminated in this order from the substrate 10 side, but the present disclosure is not limited thereto. For example, the common electrode layer 16, the second insulating layer 12c, the touch detection line layer 15, the third insulating layer 12d, and the pixel electrode layer 17 may be laminated in this order from the substrate 10 side, or the pixel electrode layer 17, the second insulating layer 12c, the touch detection line layer 15, the third insulating layer 12d, and the common electrode layer 16 may be laminated in this order from the substrate 10 side. In addition, when the common electrode layer 16 is on the side closer to the liquid crystal layer 3 than the pixel electrode layer 17, in the above first to eighth embodiments, the plurality of slits 17b formed in the pixel electrode 17a are formed in the touch detection electrode 16a. Further, a configuration without the planarization layer 12e may also be adopted.

[0055] The above configuration can also be described as follows.

[0056] The active matrix substrate related to the first configuration has a plurality of pixel regions arranged in a matrix in a first direction and a second direction intersecting the first direction, and the active matrix substrate includes: a plurality of gate lines extending along the first direction, arranged in the second direction, and formed in a gate line layer; a plurality of source lines extending along the second direction, arranged in the first direction, and formed in a source wiring layer; a plurality of touch detection lines connected to each of the plurality of touch detection electrodes and arranged along the first direction, at least a part of the plurality of touch detection lines being formed in a touch detection wiring layer, and each touch detection line of the plurality of touch detection lines having: a first part at a position overlapping any one of the plurality of source lines, the first part extending along the second direction and formed in the touch detection wiring layer; a second part at a position not overlapping the plurality of source lines, extending along the second direction; and a third part connecting the first part and the second part, and the second part of one touch detection line of the plurality of touch detection lines and the second part of a touch detection line adjacent to the one touch detection line in the first direction among the plurality of touch detection lines are alternately arranged side by side in the second direction (first configuration).

[0057] Here, when the number of touch detection electrodes is increased for high-resolution touch detection, the number of touch detection lines increases. When the number of touch detection lines is the same as the number of source lines, the source lines and the touch detection lines can be alternately arranged. When the number of touch detection lines is more than the number of source lines, touch detection lines are also arranged at positions overlapping the source lines. A difference occurs between the capacitance of the touch detection lines arranged at positions overlapping the source lines and the capacitance of the touch detection lines arranged at positions not overlapping the source lines. Due to this capacitance difference, a deviation occurs in the potentials of the plurality of touch detection electrodes (the potentials of the plurality of common electrodes). When a deviation occurs in the potentials of the plurality of touch detection electrodes, uneven display occurs. In response to this, according to the above first configuration, each of the plurality of touch detection lines includes: a first part, which is a part overlapping the source line, and the first part is formed in the touch detection line layer; and a second part, which is a part not overlapping the source line. Thus, each touch detection line of the plurality of touch detection lines has a part overlapping the source line and a part not overlapping the source line. Therefore, compared with the case including touch detection lines that entirely overlap the source line and touch detection lines that entirely do not overlap the source line among the plurality of touch detection lines, the capacitance deviation of the plurality of touch detection lines can be suppressed. As a result, even when the number of the plurality of touch detection lines is increased, the deviation of the potentials of the plurality of touch detection electrodes can be suppressed. Therefore, uneven display in the In-cell touch panel can be prevented.

[0058] In the first configuration, each of the plurality of touch detection lines may further include: a fourth portion formed on an extension line of the second direction of the first portion; and a fifth portion connecting the fourth portion and the second portion (second configuration).

[0059] According to the above second configuration, the second portion can be connected to the fourth portion formed on the extension line of the second direction of the first portion by using the fifth portion.

[0060] In the first or second configuration, the third portion may be disposed between a plurality of pixel regions adjacent to each other in the second direction (third configuration).

[0061] According to the above third configuration, the third portion of the touch detection line does not overlap with the pixel region, and thus, light passing through the pixel region can be prevented from being blocked by the third portion.

[0062] In any one of the first to third configurations, two of the plurality of gate lines may be respectively disposed between a plurality of pixel regions adjacent to each other in the second direction. The second portion may be disposed between a plurality of pixel regions adjacent to each other in the first direction (fourth configuration).

[0063] According to the above fourth configuration, the active matrix substrate can be driven with dual gates. Thus, since there are positions where the source lines are not disposed between a plurality of pixel regions adjacent to each other in the first direction, the second portion can be disposed at such positions. As a result, the second portion of the touch detection line does not overlap with the pixel region, and thus, light passing through the pixel region can be prevented from being blocked by the second portion.

[0064] In the fourth configuration, the active matrix substrate may further include conductor lines different from the plurality of source lines, and the conductor lines are formed on the source wiring layer. The conductor lines may be disposed at positions overlapping with the second portion (fifth configuration).

[0065] According to the above fifth configuration, by disposing the conductor lines, the difference in capacitance between the first portion of the touch detection line and the second portion of the touch detection line can be reduced.

[0066] In the fifth configuration, the conductor lines may be connected to the second portion (sixth configuration).

[0067] According to the above sixth configuration, the resistance of the touch detection line can be reduced. In addition, the conductor lines can be used as redundant lines of the touch detection line, and thus, the redundancy of the active matrix substrate can be improved.

[0068] In any one of the first to sixth configurations, the third portion may be disposed between a plurality of touch detection electrodes adjacent to each other in the second direction (seventh configuration).

[0069] According to the above seventh configuration, it is possible to make the capacitances of a plurality of touch detection electrodes arranged adjacent to each other in the second direction substantially equal.

[0070] In any one of the first to sixth configurations, the third portion may also be arranged at a position overlapping the central portion in the second direction of one touch detection electrode among the plurality of touch detection electrodes (eighth configuration).

[0071] According to the above eighth configuration, it is possible to make the capacitances of a plurality of touch detection lines substantially equal in the region overlapping the touch detection electrode.

[0072] In any one of the first to sixth configurations, the plurality of touch detection lines may also include a first touch detection line and a second touch detection line arranged separately from the first touch detection line in the first direction. The third portion of the first touch detection line may also be arranged at a position different from that of the third portion of the second touch detection line in the second direction (ninth configuration).

[0073] According to the above ninth configuration, the positions of the third portion of the first touch detection line and the third portion of the second touch detection line are arranged dispersedly in the second direction. Thereby, it is possible to prevent the capacitance difference of the gate line caused by the third portion from affecting the display.

[0074] In any one of the first to ninth configurations, a pixel electrode may also be included, which is respectively provided in each pixel region of the plurality of pixel regions and has a bent portion bent in the first direction. The second portion of one touch detection line among the plurality of touch detection lines may also be arranged at a position overlapping the bent portion (tenth configuration).

[0075] According to the above tenth configuration, the third portion connected to the second portion does not need to pass through the position overlapping the bent portion, so it is possible to prevent the shape of the third portion from being complicated.

[0076] In any one of the first to tenth configurations, the active matrix substrate may also include pixel electrodes provided in each of the plurality of pixel regions. The second portion of one touch detection line among the plurality of touch detection lines may be arranged at a position overlapping the pixel electrode (eleventh configuration).

[0077] According to the above eleventh configuration, even when the active matrix substrate is driven by a single gate, it is possible to prevent display unevenness and increase the number of touch detection lines at the same time.

[0078] The in-cell touch panel according to the twelfth configuration includes: an active matrix substrate of any one of the first to eleventh configurations, and a plurality of touch detection electrodes (twelfth configuration) disposed on the active matrix substrate.

[0079] According to the above twelfth configuration, an in-cell touch panel capable of preventing display unevenness and increasing the number of touch detection lines can be provided.

[0080] The display device according to the thirteenth configuration includes: an active matrix substrate of any one of the first to twelfth configurations; and a counter substrate (thirteenth configuration) disposed opposite to the active matrix substrate.

[0081] According to the above thirteenth configuration, a display device capable of preventing display unevenness and increasing the number of touch detection lines can be provided.

[0082] In the thirteenth configuration, the third part may also be disposed at a position overlapping with the light shielding member (fourteenth configuration).

[0083] According to the above fourteenth configuration, since the third part is disposed at a position where the light shielding member not used for display is disposed, the influence of the third part on the display can be prevented. Description of Reference Numerals

[0084] 1: Active matrix substrate; 2: Counter substrate; 3: Liquid crystal layer; 10: Substrate; 11: Gate line layer; 11a: Gate line; 11b: Gate line; 12a: Gate insulating layer; 12b: First insulating layer; 12c: Second insulating layer; 12d: Third insulating layer; 13: Semiconductor layer; 14: Source line layer; 14a: Source line; 15: Touch detection line layer; 16: Common electrode layer; 16a: Touch detection electrode; 16b: Contact hole; 17: Pixel electrode layer; 17a: Pixel electrode; 17b: Slit; 17c: Pixel contact hole; 21: Touch detection circuit; 22: Pixel region; 22a: Pixel region; 22b: Pixel region; 23: Transistor; 23a: Gate electrode; 23b: Source electrode; 23c: Drain electrode; 23d: Semiconductor part; 24: Gate driving circuit; 25: Source driving circuit; 30: Touch detection line; 31: First part; 32: Second part; 33: Third part; 34: Fourth part; 35: Fifth part; 40: Black matrix; 100: In-cell touch panel; 200: In-cell touch panel; 201: Active matrix substrate; 230: Touch detection line; 231: First part; 232: Second part; 233: Third part; 250: dummy line; 300: In-cell touch panel; 301: Active matrix substrate; 316a: Central part; 330: Touch detection line; 331: First part; 332: Second part; 333: Third part; 334: Fourth part; 335: Fifth part; 400: In-cell touch panel; 401: Active matrix substrate; 430a: Touch detection line; 430b: Touch detection line; 430c: Touch detection line; 433a: Third part; 433b: Third part; 433c: Third part; 435a: Fifth part; 435b: Fifth part; 435c: Fifth part; 500: In-cell touch panel; 501: Active matrix substrate; 530: Touch detection line; 531: First part; 532: Second part; 533: Third part; 550: Conductor line; 551: Contact hole; 600: In-cell touch panel; 601: Active matrix substrate; 630: Touch detection line; 631: First part; 632: Second part; 632a: Contact hole; 633: Third part; 700: In-cell touch panel; 701: Active matrix substrate; 711a: Gate line; 711b: Gate line; 711c: Gate line; 714a: Source line; 717a: Pixel electrode; 717b: Slit; 717c: Pixel contact hole; 722: Pixel region; 722a: Bending part; 723a: Gate electrode; 723b: Source electrode; 723c: Drain electrode; 730: Touch detection line; 731: First part; 732: Second part; 733: Third part; 800: In-cell touch panel;801: Active matrix substrate; 811a: Gate line; 814a: Source line; 817a: Pixel electrode; 817b: Slit; 817c: Pixel contact hole; 822: Pixel region; 823a: Gate electrode; 823b: Source electrode; 823c: Drain electrode; 830: Touch detection line; 831: First part; 832: Second part; 833: Third part.;

Claims

1. An active matrix substrate having a plurality of pixel regions arranged in a matrix in a first direction and in a second direction intersecting the first direction, wherein the active matrix substrate is characterized in that: a plurality of gate lines extending along the first direction, arranged in the second direction, and formed in the gate line layer; a plurality of source lines extending along the second direction, arranged in the first direction, and formed in the source wiring layer; a plurality of touch detection lines connected to each of the plurality of touch detection electrodes and arranged along the first direction, at least a portion of the plurality of touch detection lines being formed in a touch detection wiring layer, Each of the plurality of touch detection lines has: a first portion, which is located at a position overlapping with any source line among the plurality of source lines, the first portion extending along the second direction and formed in the touch detection wiring layer; a second portion extending along the second direction at a position not overlapping with the plurality of source lines; a third portion connecting the first portion and the second portion, The second portion of one of the touch detection lines and the second portion of a touch detection line adjacent to the one of the touch detection lines in the first direction are alternately arranged side by side in the second direction.

2. The active matrix substrate according to claim 1, characterized in that: Each of the plurality of touch detection lines further includes: a fourth portion formed on an extension line of the first portion in the second direction; and a fifth portion connecting the fourth portion and the second portion.

3. The active matrix substrate according to claim 1, characterized in that: The third portion is arranged between a plurality of pixel regions adjacent to each other in the second direction.

4. The active matrix substrate according to any one of claims 1 to 3, characterized in that: The plurality of gate lines are each arranged between a plurality of pixel regions adjacent to each other in the second direction, two of the gate lines are arranged between each of the plurality of pixel regions adjacent to each other in the second direction, The second portion is arranged between a plurality of pixel regions adjacent to each other in the first direction.

5. The active matrix substrate according to claim 4, characterized in that: It also includes a conductor line different from the plurality of source lines, and the conductor line is formed in the source wiring layer, The conductor line is arranged at a position overlapping with the second portion.

6. The active matrix substrate according to claim 5, characterized in that: The conductor line is connected to the second portion.

7. The active matrix substrate according to any one of claims 1 to 3, characterized in that: The third portion is arranged between a plurality of touch detection electrodes adjacent to each other in the second direction.

8. The active matrix substrate according to any one of claims 1 to 3, characterized in that: The third portion is arranged at a position overlapping with a central portion of one of the plurality of touch detection electrodes in the second direction.

9. The active matrix substrate according to any one of claims 1 to 3, characterized in that: The plurality of touch detection lines include a first touch detection line and a second touch detection line arranged separately from the first touch detection line in the first direction, The third portion of the first touch detection line is disposed at a different position in the second direction than the third portion of the second touch detection line.

10. The active matrix substrate according to any one of claims 1 to 3, characterized in that: It also includes a pixel electrode, which is disposed in each of the plurality of pixel regions and has a bent portion bent toward the second direction. The second portion of one touch detection line among the plurality of touch detection lines is arranged at a position overlapping with the bent portion.

11. The active matrix substrate according to any one of claims 1 to 3, characterized in that: It also includes a pixel electrode, wherein the pixel electrode is disposed in each pixel region of the plurality of pixel regions. The second portion of one touch detection line among the plurality of touch detection lines is arranged at a position overlapping with the pixel electrode.

12. An In-cell touch panel, characterized in that: include: The active matrix substrate according to claim 1; as well as A plurality of touch detection electrodes are disposed on the active matrix substrate.

13. A display device, characterized in that: include: The active matrix substrate according to claim 1; as well as A counter substrate is arranged to face the active matrix substrate.

14. The display device according to claim 13, characterized in that: The counter substrate includes a light shielding member. The third portion is arranged at a position overlapping with the light shielding member.

Images