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

Abstract

To provide an active matrix substrate, an in-cell touch panel, and a display device which can increase the number of touch detection lines while preventing generation of display unevenness.SOLUTION: An active matrix substrate 1 includes: a plurality of source lines 14a; and a plurality of touch detection lines 30. Each of the touch detection lines 30 includes: first parts 31 extending along one of the source lines 14a in a position which overlaps with the source line 14a; and second parts 32 arranged in a position which does not overlap with the source lines 14a. The second parts of touch detection lines adjacent to one another are alternately arranged in a direction extending along the source lines 14a.SELECTED DRAWING: Figure 5

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 dual gate structure. In other words, in this in-cell touch panel, two gate lines extending in the row direction are provided for each boundary portion between two adjacent pixels in the column direction. Further, the data lines extending in the column direction and the touch detection lines extending in the column direction are alternately arranged in the row direction. Further, 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

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the in-cell touch panel as described in Patent Document 1 above, when increasing the number of touch detection electrodes in order to improve the high definition of 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 arranged alternately, but when the number of touch detection lines is more than the number of data lines, the touch detection lines are also arranged at positions overlapping the data lines. For this reason, a difference occurs between the capacitance of the touch detection lines arranged overlapping the data lines and the capacitance of the touch detection lines arranged at positions not overlapping the data lines. Due to this difference in capacitance, variations occur in the potentials of a plurality of touch detection electrodes (the potentials of a plurality of common electrodes). When variations occur in the potentials of a plurality of touch detection electrodes, unevenness occurs in the display on the in-cell touch panel.

[0005] Therefore, the present disclosure has been made to solve the above-described problems, and an object thereof is to provide an active matrix substrate, an in-cell touch panel, and a display device capable of increasing the number of touch detection lines while preventing unevenness in display.

Means for Solving the Problems

[0006] In order to solve the above problems, an active matrix substrate according to a first aspect of the present disclosure is an active matrix substrate having a plurality of pixel regions arranged in a matrix in a first direction and a second direction intersecting the first direction, the active matrix substrate including: a plurality of gate lines extending in the first direction and arranged in the second direction, the plurality of gate lines formed in a gate line layer; a plurality of source lines extending in the second direction and arranged in the first direction, the plurality of source lines formed in a source line layer; and a plurality of touch detection lines each connected to a respective one of a 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 line layer. Each of the plurality of touch detection lines includes a first portion extending in the second direction at a position overlapping one of the plurality of source lines, the first portion being formed in the touch detection line layer; a second portion extending in the second direction at a position not overlapping the plurality of source lines; and a third portion connecting the first portion and the second portion. The second portions of one of the plurality of touch detection lines and the second portions of the touch detection lines adjacent in the first direction to one of the plurality of touch detection lines are alternately arranged side by side in the second direction.

[0007] An in-cell touch panel according to a second 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] Further, the display device according to the third aspect includes the active matrix substrate according to the first aspect and a counter substrate disposed to face the active matrix substrate.

Advantages of the Invention

[0009] According to the above configuration, it is possible to increase the number of touch detection lines while preventing unevenness in display.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

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Figure 10

Figure 11

Figure 12

Figure 13

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments, and design changes can be made as appropriate within the scope that satisfies the configuration of the present disclosure. In the following description, the same reference numerals are commonly used for the same parts or parts having the same functions among different drawings, and the repeated description thereof is omitted. In addition, the respective configurations described in the embodiments and modification examples may be appropriately combined or changed within the scope not departing from the gist of the present disclosure. Also, for the sake of clarity of explanation, in the drawings referred to below, the configurations are shown in a simplified or schematic manner, or some of the constituent members are omitted. Also, the dimensional ratios between the constituent members shown in each figure do not necessarily indicate the actual dimensional ratios.

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

[0013] The in-cell touch panel 100 is, for example, a horizontal electric field type liquid crystal display device. As shown in FIG. 1, 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 shown in FIG. 2, 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 laminated in this order. The gate line layer 11, the source line layer 14, and the touch detection line layer 15 contain 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 composed of an insulator containing an inorganic material or an organic material. The planarization layer 12e is composed of a photosensitive organic material. The common electrode layer 16 and the pixel electrode layer 17 are composed of a transparent conductive film such as ITO (Indium Tin Oxide) or a mesh-shaped metal film.

[0015] FIG. 3 is a plan view for explaining the arrangement of the touch detection electrodes 16a. A plurality of touch detection electrodes 16a are formed in the common electrode layer 16 (see FIG. 2) on the active matrix substrate 1. The plurality of touch detection electrodes 16a are respectively arranged 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 X1 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 plurality of touch detection electrodes 16a, acquires a detection signal from each of the plurality of touch detection electrodes 16a, and based on the detection signal, executes a touch detection process for determining the presence or absence (position of the touch) of a touch by an indicator. The touch detection circuit 21 executes the touch detection process and the display process in a time-division manner. The display process by the touch detection circuit 21 is to apply a predetermined potential common to the plurality of touch detection electrodes 16a via the touch detection lines 30, that is, a common potential serving as a reference for the potential supplied to the pixel electrode 17a when operating the liquid crystal in the liquid crystal layer 3.

[0016] Here, the right direction (row direction) on the paper surface in FIG. 3 is defined as the X1 direction, and the opposite direction is defined as the X2 direction. Also, in the direction along the surface of the active matrix substrate 1, the direction orthogonal to the X1 direction is defined as the Y1 direction, and the opposite direction is defined as the Y2 direction. Then, the normal direction of the active matrix substrate 1 is defined as the Z1 direction, and the opposite direction is defined as the Z2 direction.

[0017] FIG. 4 is a circuit diagram for explaining the configuration of the pixel region 22 formed on the active matrix substrate 1. As shown in FIG. 4, on the active matrix substrate 1, a plurality of gate lines 11a and a plurality of gate lines 11b extending in the X1 direction, 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. Also, 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 one row of pixel regions 22 is driven by two gate lines. The pixel region 22 connected to the gate line 11a is defined as the pixel region 22a. Also, the pixel region 22 connected to the gate line 11b is defined as the pixel region 22b. The pixel region 22a and the pixel region 22b are alternately arranged in the X1 direction. Also, the source line 14a is disposed between the pixel region 22a and the pixel region 22b adjacent in the X1 direction. The source line 14a is positioned in the X2 direction with respect to the pixel region 22a and in the X1 direction with respect to the pixel region 22b. And the source line 14a is not disposed at a position in the X1 direction with respect to the pixel region 22a and 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 (two rows of pixel regions). In the following description, when the pixel region 22a and the pixel region 22b are not distinguished, they are described as the pixel region 22.

[0019] As shown in FIG. 4, 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. Also, 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. Also, the source electrode 23b is connected to the source line 14a. The drain electrode 23c is formed in the source line layer 14. Also, the drain electrode 23c is connected to the pixel electrode 17a through 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 is composed of 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. Also, an opening of the touch detection electrode 16a is formed at a position overlapping the pixel contact hole 17c in plan view. The drain electrode 23c is connected to the island-shaped electrode through the first pixel contact hole, and the island-shaped electrode is connected to the pixel electrode 17a through the second pixel contact hole. The transistor 23 is provided with a semiconductor portion 23d (see FIG. 5) connected to the source electrode 23b and the drain electrode 23c.

[0020] The pixel electrode 17a is formed in the pixel electrode layer 17 and includes a plurality of slits 17b extending along the source line 14a. The touch detection electrode 16a is a common electrode disposed to face the pixel electrode 17a provided in each of the plurality of pixel regions 22. On the active matrix substrate 1, a gate drive circuit 24 and a source drive circuit 25 are disposed. The gate drive circuit 24 sequentially supplies gate signals to the plurality of gate lines 11a and 11b. The source drive circuit 25 supplies source signals to the plurality of source lines 14a. The gate drive circuit 24 is monolithically formed on the substrate 10 using the same film-forming material as the transistor 23 connected to the pixel electrode 17a. The source drive circuit 25 is included in a driver mounted on the substrate 10, and the source drive circuit 25 may be included in the same driver including the touch detection circuit 21 (see FIG. 2). When a gate signal for turning 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 to update (rewrite) the potential of the pixel electrode 17a. The pixel electrode 17a generates an electric field between the pixel electrode 17a and the touch detection electrode 16a through the plurality of slits 17b formed in the pixel electrode 17a, thereby operating the liquid crystal in the liquid crystal layer 3 to display an image on the in-cell touch panel 100.

[0021] The touch detection line 30 shown in FIG. 3 is connected to the touch detection electrode 16a. The touch detection line 30 is formed in the touch detection line layer 15 (see FIG. 2) through a contact hole 16b formed in the second insulating layer 12c. There may be at least one contact hole 16b for each touch detection electrode 16a, or there may be a plurality of contact holes 16b. When there are a plurality of contact holes 16b, the redundancy is improved, and the resistance distribution in the touch detection electrode 16a can be reduced.

[0022] FIG. 5 is a diagram for explaining the configuration of the touch detection line 30. As shown in FIG. 5, 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 extending in the Y1 direction at a position overlapping with one of the plurality of source lines 14a via the first insulating layer 12b and the planarization layer 12e. 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, and as shown in FIG. 5, also includes extending at an angle with respect to the Y1 direction. The second portion is a portion extending in the Y1 direction at a position not overlapping with 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 to be dual-gate driven, a region 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 the region. As a result, since the second portion 32 does not overlap with the pixel region 22, it is possible to prevent light passing through the pixel region 22 from being blocked by the second portion 32. Also, as shown in FIG. 5, 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. Also, the third portion 33 is disposed at a position overlapping with the gate line 11b via the gate insulating layer 12a, the first insulating layer 12b, and the planarization layer 12e. Also, the third portion 33 is disposed between two adjacent pixel regions 22 in the Y1 direction. Also, as shown in FIG. 3, the third portion 33 is disposed between two adjacent touch detection electrodes 16a in the Y1 direction.

[0024] In the first embodiment, as shown in FIG. 5, each of the plurality of touch detection lines 30 is provided with a first portion 31 and a second portion 32. Further, one second portion 32 of the plurality of touch detection lines 30 and the second portion 32 of the touch detection line 30 adjacent in the X1 direction to one of the plurality of touch detection lines 30 are alternately arranged in the Y1 direction. As a result, even when the number of the plurality of touch detection lines 30 is increased, none of the specific touch detection lines among the plurality of touch detection lines 30 has a portion overlapping with the source line 14a, and each of the plurality of touch detection lines 30 includes a portion overlapping with the source line 14a and a portion not overlapping with the source line 14a. Therefore, the capacitance formed between the source line 14a does not increase only in a specific touch detection line, and the difference between the capacitance of one touch detection line among the plurality of touch detection lines 30 and the capacitance of another touch detection line 30 adjacent in the X1 direction to one of the plurality of touch detection lines 30 can be reduced, so that the variation in the capacitance of the plurality of touch detection lines 30 can be suppressed. As a result, the variation in the potential of the plurality of touch detection electrodes 16a can be suppressed, and unevenness in display in the in-cell touch panel can be prevented.

[0025] As shown in FIG. 3, each of the plurality of touch detection lines 30 further includes a fourth portion 34 formed on the 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 in the Y1 direction, and overlaps the gate line 11b via the gate insulating layer 12a, the first insulating layer 12b, and the planarization layer 12e, similarly to the third portion 33. As shown in FIG. 3, the touch detection lines 30 are arranged to extend in the Y1 direction while meandering in the X1 direction and the X2 direction.

[0026] FIG. 6 is a diagram for explaining the arrangement position of the black matrix 40. As shown in FIG. 6, the black matrix 40 is provided on the counter substrate 2. The black matrix 40 is a light-shielding member. The black matrix 40 is arranged between a plurality of pixel regions 22 and overlaps with the semiconductor portion 23d of the transistor 23 and the pixel contact hole 17c. Further, any of the first portion 31 to the fifth portion 35 of the touch detection line 30 is arranged at a position overlapping with the black matrix 40. Thereby, it is possible to prevent the touch detection line 30 from affecting the display.

[0027] [Second Embodiment] Next, with reference to FIG. 7, the configuration of the in-cell touch panel 200 according to the second embodiment will be described. In the second embodiment, a dummy line 250 is arranged at a position overlapping with the second portion 232 of the touch detection line 230. Note that, for the same configuration as that of the first embodiment, the same reference numerals as those in the first embodiment are used and the description thereof is omitted. Note that the "dummy line 250" is an example of the "conductor line" of the present disclosure.

[0028] FIG. 7 is a diagram showing the configuration of the in-cell touch panel 200 according to the second embodiment. The in-cell touch panel 200 includes an active matrix substrate 201. The active matrix substrate 201 includes a dummy line 250 extending in the Y1 direction. The dummy line 250 is a conductor line different from a plurality of source lines 14a and is a conductor line formed in the source line layer 14 (see FIG. 2). The dummy line 250 is arranged 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. The dummy line 250 is a conductor line that is not connected to the source drive circuit 25 (see FIG. 4) or to which no source signal is supplied from the source drive circuit 25. That is, the dummy line 250 is a conductor line that does not function as a source line. For example, a common potential is supplied to the dummy line 250.

[0029] As shown in FIG. 7, the touch detection line 230 includes a first portion 231 disposed at a position overlapping with the source line 14a, a second portion 232 disposed 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 line 250 is disposed at a position overlapping with the second portion 232 of the touch detection line 230. For this reason, the first portion 231 of the touch detection line 230 overlaps with the source line 14a, and the second portion 232 overlaps with the dummy line 250. Here, in the first embodiment, there may be a large 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. Depending on the number and size of the touch detection electrodes 16a, or the position of the contact hole 16b, the difference in capacitance between a certain touch detection line 30 and the touch detection line 30 adjacent to the certain touch detection line 30 may become large. In the second embodiment, by providing the dummy line 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. Note that the other configurations and effects of the second embodiment are the same as those of the first embodiment.

[0030] [Third Embodiment] Next, with reference to FIG. 8, the configuration of the in-cell touch panel 300 according to 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 with the central portion 316a of the touch detection electrode 16a. Note that the same reference numerals as those in the first embodiment are used for the same configurations as those in the first embodiment, and the description thereof is omitted.

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

[0032] [Fourth Embodiment] Next, with reference to FIG. 9, the configuration of the in-cell touch panel 400 according to 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 from each other in the Y1 direction. Note that the same reference numerals as those in the first embodiment are used for the same configurations as those in the first embodiment, and the description thereof is omitted.

[0033] FIG. 9 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 shown in FIG. 9, 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. Also, 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 dispersed and arranged at 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, may become larger than that of other gate lines, and there may be a difference in the way the gate signal decays. At this time, the display of a specific pixel region arranged in the row direction may not be appropriate, and it may be visually recognized as a horizontal stripe by the user on the in-cell touch panel 400. As shown in FIG. 9, by dispersing the third portions and the fifth portions of the touch detection lines 430a to 430c at different positions in the Y1 direction, it is possible to prevent the difference in the capacitance of the gate line caused by the third portion from affecting the display. Note that 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 FIG. 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 disposed at a position overlapping the second portion 532 of the touch detection line 530. Note that the same reference numerals as those in the first embodiment are used for the same configurations as those in the first embodiment, and the description thereof is omitted.

[0036] FIG. 10 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 a conductor line 550 extending in the Y1 direction. The conductor line 550 is a conductor line different from the plurality of source lines 14a and is formed in the source line layer 14 (see FIG. 2). The conductor line 550 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.

[0037] As shown in FIG. 10, the touch detection line 530 includes a first portion 531 disposed at a position overlapping the source line 14a, a second portion 532 disposed at a position not overlapping the source line 14a, and a third portion 533 connecting the first portion 531 and the second portion 532. The conductor line 550 is disposed at a position overlapping the second portion 532 of the touch detection line 530. The conductor line 550 is connected to the second portion 532 through 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 each of the second portions 532. Thereby, the electrical resistance of the touch detection line 530 can be reduced. Further, since the conductor line 550 can be used as a redundant line of the touch detection line 530, the redundancy of the in-cell touch panel 500 can be improved. Note that the other configurations and effects of the fifth embodiment are the same as those of the first embodiment.

[0038] [Sixth Embodiment] Next, with reference to FIG. 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. Note that 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 will be omitted.

[0039] FIG. 11 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 FIG. 2). The second portion 632 is connected to the third portion 633 via a contact hole 632a formed in the first insulating layer 12b and the planarization layer 12e. In the first embodiment, the second insulating layer 12c was interposed between the second portion 32 formed in the touch detection line layer 15 and the touch detection electrode 16a. However, in the sixth embodiment, the first insulating layer 12b, the planarization layer 12e, and the second insulating layer 12c are interposed between the second portion 632 formed in the source line layer 14 and the touch detection electrode 16a. Therefore, the capacitance formed between the second portion 632 and the touch detection electrode 16a can be reduced. Note that 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 FIG. 12, the configuration of the in-cell touch panel 700 according to 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. Note that 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 will be omitted.

[0041] FIG. 12 is a diagram showing the configuration of an in-cell touch panel 700 according to 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 per row is one-third of that in the first embodiment, and the number of pixel regions 722 per column is three times that in the first embodiment. Also, 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 method.

[0042] Also, as shown in FIG. 12, in the pixel region 722, a kink portion 722a that is the central portion in the X1 direction is arranged at the most Y1-direction position. And, the ends in the X1 direction and the ends in the X2 direction of the pixel region 722 are arranged at positions in the Y2 direction with respect to the kink portion 722a. That is, the pixel region 722 (pixel electrode) and the plurality of slits 717b formed in the pixel electrode 717a are bent along the gate lines 711a to 711c at the kink portion 722a in plan view. Also, a gate electrode 723a, a source electrode 723b, and a drain electrode 723c are arranged at positions in the X2 direction with respect to the pixel region 722. Also, the pixel electrode 717a and the drain electrode 723c are connected via a pixel contact hole 717c.

[0043] The touch detection line 730 includes a first portion 731 disposed at a position overlapping with the source line 714a, a second portion 732 disposed at a position not overlapping with the source line 714a, and a third portion 733 connecting the first portion 731 and the second portion 732. The second portion 732 is disposed at the kink portion 722a. In the horizontal electric field type liquid crystal display device, the kink portion 722a is a boundary region where the directions of the electric fields for operating the liquid crystal in the liquid crystal layer 3 are different from each other, and is a region with little contribution to the display. By disposing the second portion 732 overlapping with the kink portion 722a, it is possible to prevent the luminance from decreasing. Further, one second portion 732 among the plurality of touch detection lines 730 and the second portion 732 of the touch detection line 730 adjacent in the X1 direction to one of the plurality of touch detection lines 730 are alternately arranged in the Y1 direction. According to the seventh embodiment, also in the active matrix substrate 701 driven by the triple gate method, the number of touch detection lines 730 can be increased while preventing unevenness in display. Note that 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 FIG. 13, the configuration of the in-cell touch panel 800 according to the eighth embodiment will be described. In the eighth embodiment, the active matrix substrate 801 is configured to be driven by the single gate method. Note that 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.

[0045] FIG. 13 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 X1 direction, and a touch detection line 830. In the first embodiment, one row of pixel regions 22 was driven by two gate lines, but in the eighth embodiment, one row of pixel regions 22 is driven by one gate line 811a. Also, in the first embodiment, one source line 14a was provided for each of two columns of pixel regions, but in the eighth embodiment, one source line 814a is provided for each column of pixel regions. That is, the active matrix substrate 801 is configured to be driven in a single-gate method.

[0046] Also, as shown in FIG. 13, 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 with the source line 814a, a second portion 832 disposed at a position not overlapping with the source line 814a, and a third portion 833 connecting the first portion 831 and the second portion 832. A pixel electrode 817a is disposed in the pixel region 822. The second portion 832 is disposed at a position where the distances from two adjacent source lines 814a are substantially the same and overlapping with the pixel electrode 817a. Further, one second portion 832 among a plurality of touch detection lines 830 and the second portion 832 of a touch detection line adjacent in the X1 direction to one of the plurality of touch detection lines 830 are alternately arranged in the Y1 direction. Thereby, even in the active matrix substrate 801 driven by the single gate method, the number of touch detection lines 830 can be increased while preventing uneven display. Note that the other configurations and effects of the eighth embodiment are the same as those of the first embodiment.

[0048] Although the embodiments have been described above, the above-described embodiments are merely examples for implementing the present disclosure. Therefore, the present disclosure is not limited to the above-described embodiments, and the above-described embodiments can be appropriately modified and implemented without departing from the spirit thereof.

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

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

[0051] (3) In the above-described first to eighth embodiments, an example of providing the fourth and fifth portions on the touch detection line has been given, but the present disclosure is not limited thereto. That is, the touch detection line may be composed of only the first to third portions.

[0052] (4) In the above-described first to eighth embodiments, examples of the materials of each layer have been shown, but the present disclosure is not limited thereto. For example, the touch detection line layer may be formed of ITO.

[0053] (5) In the above-described first to eighth embodiments, an example of disposing the third portion at a position overlapping the black matrix has been given, but the present disclosure is not limited thereto. For example, the third portion may be disposed at a position overlapping the color filter, or may be disposed at a position not overlapping either the color filter or the black matrix.

[0054] (6) In the above-described first to eighth embodiments, an example 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 has been shown, but the present disclosure is not limited thereto. For example, from the substrate 10 side, 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, or from the substrate 10 side, 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. 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-described first to eighth embodiments, the plurality of slits 17b formed in the pixel electrode 17a are formed in the touch detection electrode 16a. Also, a configuration without the planarization layer 12e may be employed.

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

[0056] The active matrix substrate according to the first configuration is an active matrix substrate having a plurality of pixel regions arranged in a matrix in a first direction and a second direction intersecting the first direction, a plurality of gate lines extending in the first direction and arranged in the second direction, the plurality of gate lines formed in a gate line layer; a plurality of source lines extending in the second direction and arranged in the first direction, the plurality of source lines formed in a source line layer; a plurality of touch detection lines each connected to a respective one 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 line layer, wherein each of the plurality of touch detection lines includes: a first portion extending in the second direction at a position overlapping with any one of the plurality of source lines, the first portion being formed in the touch detection line layer; a second portion extending in 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, and the second portions of one of the plurality of touch detection lines and the second portions of the touch detection lines adjacent in the first direction to one of the plurality of touch detection lines are alternately arranged in the second direction (first configuration).

[0057] Here, when increasing the number of touch detection electrodes to achieve higher precision in 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 arranged alternately. However, when the number of touch detection lines is greater than the number of source lines, touch detection lines will also be arranged at positions overlapping the source lines. A difference occurs between the capacitance of the touch detection lines arranged 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, variations occur in the potentials of the plurality of touch detection electrodes (the potentials of the plurality of common electrodes). When variations occur in the potentials of the plurality of touch detection electrodes, unevenness will occur in the display. On the other hand, according to the above-described first configuration, each of the plurality of touch detection lines includes a first portion that is a portion overlapping the source line, a first portion formed in the touch detection line layer, and a second portion that is a portion not overlapping the source line. Thereby, for any of the plurality of touch detection lines, a portion overlapping the source line and a portion not overlapping the source line are formed. Therefore, compared with the case where among the plurality of touch detection lines, there are touch detection lines that entirely overlap the source line and touch detection lines that entirely do not overlap the source line, variations in the capacitance 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, variations in the potentials of the plurality of touch detection electrodes can be suppressed, so that unevenness in the 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 in 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-described second configuration, the second portion can be connected to the fourth portion formed on the extension line in the second direction of the first portion by the fifth portion.

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

[0061] According to the above third configuration, since the third portion of the touch detection line does not overlap the pixel region, it is possible to prevent light passing through the pixel region 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 disposed between a plurality of pixel regions adjacent in the second direction. The second portion may be disposed between a plurality of pixel regions adjacent in the first direction (fourth configuration).

[0063] According to the above fourth configuration, the active matrix substrate can be driven by dual gates. As a result, a position where no source line is disposed between a plurality of pixel regions adjacent in the first direction is generated, and the second portion can be disposed at the position. As a result, since the second portion of the touch detection line does not overlap the pixel region, it is possible to prevent light passing through the pixel region from being blocked by the second portion.

[0064] In the fourth configuration, the active matrix substrate may further include a conductor line different from the plurality of source lines and formed in the source line layer. The conductor line may be disposed at a position overlapping the second portion (fifth configuration).

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

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

[0067] According to the above-described sixth configuration, the electrical resistance of the touch detection line can be reduced. Further, since the conductor line can be used as a redundant line of the touch detection line, 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 in the second direction (seventh configuration).

[0069] According to the above-described seventh configuration, the capacitances of a plurality of touch detection electrodes disposed across a plurality of touch detection electrodes adjacent in the second direction can be made substantially equal.

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

[0071] According to the above-described eighth configuration, in a region overlapping the touch detection electrode, the capacitances of a plurality of touch detection lines can be made substantially equal.

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

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

[0074] In any one of the configurations from the first to the ninth, a pixel electrode provided in each of the plurality of pixel regions, the pixel electrode having a bent portion bent in the first direction, may be further included. One of the second portions of the plurality of touch detection lines may be disposed at a position overlapping the bent portion (tenth configuration).

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

[0076] In any one of the configurations from the first to the tenth, the active matrix substrate may further include pixel electrodes provided in each of the plurality of pixel regions. One of the second portions of the plurality of touch detection lines may be disposed at a position overlapping the pixel electrode (eleventh configuration).

[0077] According to the eleventh configuration, even when the active matrix substrate is driven by single gate, it is possible to increase the number of touch detection lines while preventing uneven display.

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

[0079] According to the twelfth configuration, it is possible to provide an in-cell touch panel capable of increasing the number of touch detection lines while preventing uneven display.

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

[0081] According to the above-described 13th configuration, it is possible to provide a display device capable of increasing the number of touch detection lines while preventing unevenness in display.

[0082] In the 13th configuration, the third portion may be disposed at a position overlapping with the light-shielding member (14th configuration).

[0083] According to the above-described 14th configuration, since the third portion is disposed at the position where the light-shielding member not used for display is disposed, it is possible to prevent the third portion from affecting the display.

Description of Reference Numerals

[0084] 1: Active matrix substrate, 2: Opposing 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 drive circuit, 25: Source drive 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: Kink 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 a second direction intersecting the first direction, A plurality of gate lines extending in the first direction and arranged in the second direction, the plurality of gate lines formed in a gate line layer, A plurality of source lines extending in the second direction and arranged in the first direction, the plurality of source lines formed in a source line layer, A plurality of touch detection lines connected to respective ones 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 line layer, Each of the plurality of touch detection lines, At a position overlapping any one of the plurality of source lines, a first portion extending in the second direction, the first portion being formed in the touch detection line layer, At a position not overlapping the plurality of source lines, a second portion extending in the second direction, And a third portion connecting the first portion and the second portion, An active matrix substrate, wherein the second portions of one of the plurality of touch detection lines and the second portions of the touch detection lines 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.

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

3. The active matrix substrate according to claim 1, wherein the third portion is disposed between a plurality of adjacent pixel regions in the second direction.

4. Two of the plurality of gate lines are arranged between a plurality of adjacent pixel regions in the second direction, The active matrix substrate according to any one of claims 1 to 3, wherein the second portion is disposed between a plurality of adjacent pixel regions in the first direction.

5. Further comprising a conductor line different from the plurality of source lines and formed in the source line layer, The active matrix substrate according to claim 4, wherein the conductor line is disposed at a position overlapping the second portion.

6. The active matrix substrate according to claim 5, wherein the conductor line is connected to the second portion.

7. The active matrix substrate according to any one of claims 1 to 3, wherein the third portion is disposed 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, wherein the third portion is disposed at a position overlapping a central portion of one of the plurality of touch detection electrodes in the second direction.

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

10. The active matrix substrate according to any one of claims 1 to 3, further comprising pixel electrodes provided in each of the plurality of pixel regions, the pixel electrodes having bent portions bent in the second direction. The active matrix substrate according to any one of claims 1 to 3, wherein a second portion of one of the plurality of touch detection lines is disposed at a position overlapping the bent portion.

11. The active matrix substrate according to any one of claims 1 to 3, further comprising pixel electrodes provided in each of the plurality of pixel regions. The active matrix substrate according to any one of claims 1 to 3, wherein a second portion of one of the plurality of touch detection lines is disposed at a position overlapping the pixel electrode.

12. An in-cell touch panel comprising the active matrix substrate according to claim 1 and a plurality of touch detection electrodes disposed on the active matrix substrate.

13. A display device comprising the active matrix substrate according to claim 1 and a counter substrate disposed opposite to the active matrix substrate.

14. The counter substrate includes a light-shielding member. The display device according to claim 13, wherein the third portion is disposed at a position overlapping the light-shielding member.

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