WO2019031298A1

WO2019031298A1 - Display panel

Info

Publication number: WO2019031298A1
Application number: PCT/JP2018/028545
Authority: WO
Inventors: 吉田　昌弘
Original assignee: シャープ株式会社
Priority date: 2017-08-07
Filing date: 2018-07-31
Publication date: 2019-02-14

Abstract

This display panel is characterized by being provided with: a plurality of position detection electrodes 27 that form common electrodes 19 which are disposed so as to be superimposed over a plurality of pixel electrodes 16 disposed in a display region AA; a driver 25 that is disposed in one portion A1 of a pair of portions which are disposed in a non-display region NAA so as to sandwich the display region AA, and that is capable of supplying a common signal to the position detection electrodes 27; a first trunk wiring 31 which is disposed in said one portion A1 and to which a common signal is supplied; a second trunk wiring 32 disposed in the other portion A2; a first wiring 35 that is disposed so as to pass through the display region AA, that connects between the driver 25 and the second trunk wiring 32, and that is connected, at a midpoint in the extension direction thereof, to the position detection electrodes 27; and a plurality of second wirings 42 that are disposed so as to pass through the display region AA and disposed on the same layer as the first wiring 35, and that connect between the first trunk wiring 31 and the second trunk wiring 32.

Description

Display panel

The present invention relates to a display panel.

DESCRIPTION OF RELATED ART Conventionally, what was described in following patent document 1 as an example of a display panel provided with a touch-panel function is known. The display panel described in Patent Document 1 includes a plurality of position detection electrodes (touch electrodes) formed on a substrate, a plurality of pixel electrodes (pixel electrodes), and a source drive touch sensing IC (common signal supply unit). Equipped with The position detection electrode is connected to the source drive touch sensing IC via a wire (touch routing wire). Also, the plurality of position detection electrodes constitute a common electrode. The source drive touch sensing IC supplies a drive voltage to the gate line when the display panel is driven in the display mode, supplies display data to the data line, and outputs a common signal (common signal) to the position detection electrode (common electrode). Supply. In addition, the source drive touch sensing IC supplies a touch drive voltage to the position detection electrode during touch drive, scans a change in capacitance of the touch electrode before and after the touch, and detects the position of the position detection electrode where the touch is performed. judge.

JP, 2016-38594, A

(Problems to be solved by the invention)
In the above configuration, the length of the wiring for supplying the common signal is different between the position detection electrode relatively close to the source drive touch sensing IC which is the common signal supply unit and the position detection electrode relatively far. . If the wiring is long, the bluntness of the common signal becomes large, so that the timing at which the predetermined potential is reached varies in the position detection electrode close to the common signal supply unit and the position detection electrode far therefrom. As a result, the display quality may be degraded.

The present invention has been completed based on the above circumstances, and it is an object of the present invention to provide a display panel capable of further enhancing the display quality.

(Means to solve the problem)
In order to solve the above problems, the display panel of the present invention comprises a substrate divided into a display area capable of displaying an image and a non-display area surrounding the display area, and a plurality of pixel electrodes arranged in the display area. And a plurality of position detection electrodes arranged in a matrix in the display area to detect an input position by the position input body, and constituting a common electrode disposed in a superimposed manner on the plurality of pixel electrodes A plurality of position detection electrodes and one of a pair of portions arranged to sandwich the display area in the non-display area can be arranged to supply a common signal to the position detection electrodes A common signal supply unit, a first trunk wiring disposed in the one portion and to which a common signal is supplied from the common signal supply unit, and a second trunk disposed in the other of the pair of portions Wiring and the display area A first wiring connected to the common signal supply unit and the second main wiring and connected to the position detection electrode at an intermediate part in the extending direction, and the display area being passed through And a plurality of second wirings which are arranged in the same layer as the first wiring and connect the first main wiring and the second main wiring.

The common signal supplied from the common signal supply unit is transmitted to the position detection electrode from the end on the common signal supply unit side of the first wiring. Further, the common signal supplied to the first main wiring is transmitted to the second main wiring through the second wiring, and is transmitted to the position detection electrode from the end on the second main wiring side of the first wiring. A configuration in which the common signal is supplied only from the common signal supply unit side by supplying the common signal to one position detection electrode from both ends (both sides sandwiching the display area) of one position detection electrode as described above Compared to the above, it is possible to suppress the occurrence of variations in the potentials of the position detection electrodes due to the distance between the common signal supply unit and the position detection electrodes, and to improve the display quality.

(Effect of the invention)
According to the present invention, it is possible to provide a display panel capable of further enhancing the display quality.

Sectional view schematically showing a liquid crystal panel according to Embodiment 1 of the present invention Top view schematically showing the wiring configuration of the array substrate constituting the liquid crystal panel Plan view showing the vicinity of the first main wiring on the array substrate Plan view showing the vicinity of the pixel electrode on the array substrate Top view showing the vicinity of the second main wiring on the array substrate A cross sectional view showing an array substrate (corresponding to a view cut along the line VI-VI in FIG. 5) A plan view schematically showing a wiring configuration of an array substrate according to a second embodiment The top view which shows the 2nd trunk wiring vicinity in the array substrate which concerns on Embodiment 2. A plan view schematically showing a wiring configuration of an array substrate according to a third embodiment

First Embodiment
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6. In the present embodiment, a liquid crystal panel 10 (display panel) having a touch panel function (position input function) in addition to the display function is exemplified. In addition, X-axis, Y-axis, and Z-axis are shown in a part of each drawing, and it is drawn so that each axis direction may turn into the direction shown in each drawing. Further, in the vertical direction, the upper side of FIG. 1 is referred to as the front side and the lower side of FIG. The liquid crystal panel 10 displays an image using illumination light emitted from a backlight device (illumination device) not shown.

As shown in FIG. 1, the liquid crystal panel 10 is provided between a pair of substantially transparent and excellent light transmitting

glass substrates

11 and 12 and plate surfaces facing each other on both the

substrates

11 and 12. It comprises at least a liquid crystal layer 13 containing liquid crystal molecules, which is a substance disposed in the internal space S1 and whose optical characteristics change with application of an electric field, and a seal member 14. Of the pair of

substrates

11 and 12 constituting the liquid crystal panel 10, the front side (front side) is the CF substrate 11 (counter substrate), and the back side (back side) is the array substrate 12 (wiring substrate, active matrix substrate) . Each of the CF substrate 11 and the array substrate 12 is formed by laminating various films on the inner surface side of a glass substrate.

The CF substrate 11 is disposed to face the array substrate 12 via the liquid crystal layer 13. The seal member 14 is made of, for example, a photocurable resin material such as an ultraviolet curable resin material. The seal member 14 has a rectangular frame shape, is disposed so as to surround the internal space S1 between the array substrate 12 and the CF substrate 11, and seals the liquid crystal layer 13. In addition, the polarizing plate which is not shown in figure is stuck on the outer surface side of both board |

substrates

11 and 12, respectively.

The liquid crystal panel 10 (and consequently the array substrate 12 and the glass substrate 29) is divided into a display area AA capable of displaying an image and a non-display area NAA in which no image is displayed. The display area AA has a rectangular shape as shown by a dot-and-dash line in FIG. 2 and is disposed at the center side portion of the liquid crystal panel 10. The non-display area NAA is a frame-like outer peripheral portion surrounding the display area AA. As shown in FIG. 1, a part of the array substrate 12 protrudes laterally with respect to the CF substrate 11, and various signals related to the display function and the touch panel function are formed on the protruding portion (non-display area NAA). The driver 25 and the flexible substrate 26 are mounted as components for supplying the The flexible substrate 26 is connected at one end to the array substrate 12 and at the other end to a control substrate (not shown). Various signals supplied from the control substrate are transmitted to the liquid crystal panel 10 through the flexible substrate 26 and processed by the driver 25 in the non-display area NAA and output toward the display area AA.

On the inner surface side of the display area AA of the glass substrate 29 constituting the array substrate 12, as shown in FIGS. 3 and 4, a plurality of TFTs 15 and pixel electrodes 16 are arranged along the X axis direction and the Y axis direction. It is provided in a matrix form (matrix form). In addition, a gate wiring 20 and a source wiring 22 having a substantially lattice shape are disposed around the TFT 15 and the pixel electrode 16 so as to surround the same. While gate interconnection 20 extends substantially straight along the X-axis direction, source interconnection 22 extends generally along the Y-axis direction, and a portion thereof extends in the Y-axis direction. And extend along an oblique direction. The gate wiring 20 is connected to the gate electrode of the TFT 15, and the source wiring 22 is connected to the source electrode of the TFT 15. Also, the pixel electrode 16 is connected to the drain electrode of the TFT 15. That is, the source wiring 22 (pixel wiring) is connected to the pixel electrode 16 via the TFT 15. In addition, as a material of the semiconductor film forming the TFT 15, although an amorphous silicon or an In-Ga-Zn-O-based semiconductor (indium gallium zinc oxide) or the like can be exemplified, it is not limited thereto. The pixel wiring connected to the pixel electrode 16 also includes the pixel wiring connected to the pixel electrode 16 via the TFT 15.

The TFT 15 is driven based on various signals supplied to the gate wiring 20 and the source wiring 22, and the supply of the potential to the pixel electrode 16 is controlled along with the driving. The pixel electrode 16 has a substantially parallelogram whose plan shape is vertically long, and the source wiring 22 is interposed between the pixel electrode 16 adjacent in the X-axis direction and the pixel electrode 16 adjacent in the Y-axis direction. The gate wiring 20 is interposed between them. Further, the CF substrate 11 is provided with three color filters (not shown) exhibiting red (R), green (G) and blue (B). In the liquid crystal panel 10, the pixel portion PX is configured by facing one pixel electrode 16 and one color filter. That is, the liquid crystal panel 10 includes the pixel units PX of three colors corresponding to the color filters of three colors.

A common electrode 19 is formed on the glass substrate 29 (substrate) so as to overlap all the pixel electrodes 16. The common electrode 19 is disposed on the upper layer side (the front side in FIG. 4) of the pixel electrode 16. Note that, in FIGS. 3 to 5, basically, the component formed in the layer on the front side of the layer in which the source wiring 22 is formed is indicated by a two-dot chain line, and the component on the back side The components formed in the layer of are shown in broken lines. The common electrode 19 is supplied with a common signal (a signal for setting the common electrode 19 to a constant reference potential), and extends over substantially the entire display area AA. In the common electrode 19, a plurality of pixel overlapping openings 17 are formed in a portion overlapping with the pixel electrode 16. The pixel overlapping opening 17 extends along the obliquely extending portion 21 of the source wiring 22.

When a potential difference is generated as the pixel electrode 16 is charged between the pixel electrode 16 and the common electrode 19 overlapping each other, an array substrate is formed between the opening edge of the pixel overlapping opening 17 and the pixel electrode 16. Since a fringe electric field (oblique electric field) including a component in the direction normal to the plate surface of the array substrate 12 is generated in addition to the components along the plate surface of 12, the liquid crystal molecules contained in the liquid crystal layer 13 using the fringe electric field It is possible to control the orientation state of. That is, in the liquid crystal panel 10 according to the present embodiment, the operation mode is set to an FFS (Fringe Field Switching) mode. Further, in FIG. 4, the light shielding portion 24 formed in the display area AA on the inner surface side of the CF substrate 11 is indicated by a two-dot chain line. The light shielding portion 24 has a substantially lattice shape, and has a pixel opening 23 for transmitting light at a position overlapping with most of the pixel electrode 16. The light shielding portion 24 has a function of preventing color mixing between the pixel portions PX exhibiting different colors. The pixel electrode 16 and the common electrode 19 are made of a transparent electrode material (for example, ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide)).

The liquid crystal panel 10 according to the present embodiment has a display function for displaying an image and a touch panel function (position input function) for detecting a position (input position) input by the user based on the displayed image. Of these, the touch panel pattern for exhibiting the touch panel function is integrated (in-cell). The touch panel pattern is a so-called projected capacitive system, and its detection system is a self-capacitive system. As shown in FIG. 2, the touch panel pattern is composed of a plurality of position detection electrodes 27 arranged in a matrix (matrix) on the surface of the glass substrate 29. The position detection electrode 27 is disposed in the display area AA. When the user of the liquid crystal panel 10 brings a finger (position input member) (not shown) as a conductor close to the surface (display surface) of the liquid crystal panel 10, a capacitance is formed between the finger and the position detection electrode 27 It will be done. As a result, the capacitance detected by the position detection electrode 27 near the finger changes as the finger approaches, and the capacitance is different from that of the position detection electrode 27 far from the finger Since it becomes, it becomes possible to detect the input position by a finger based on it. The common electrode 19 described above is configured of a plurality of position detection electrodes 27.

Further, as shown in FIG. 2, in the glass substrate 29 constituting the array substrate 12, gate drivers 28 to which the gate wirings 20 are connected are respectively provided at both end portions in the X-axis direction. The gate driver 28 has an elongated shape in the Y-axis direction, and is formed monolithically on a glass substrate 29, for example. In the present embodiment, one gate line 20 is connected to one of the pair of

gate drivers

28 and 28, and the gate line 20 connected to the gate driver 28 on the left side of FIG. The gate wirings 20 connected to the gate driver 28 on the right side of FIG. 2 are alternately arranged in the Y-axis direction. Further, a plurality of wirings 45 are connected to the gate driver 28. A terminal portion 46 is provided at the tip of each wire 45, and a control substrate is connected to the terminal portion 46 via the flexible substrate 26. Drive signals (a clock signal, a low potential signal, a scan start signal, etc.) are supplied to the gate driver 28 through the respective wires 45. Note that in FIG. 2, among the plurality of wires 45, the wire 47 for supplying a scan start signal to the gate driver 28 is denoted by reference numeral 47.

As shown in FIG. 2, in the non-display area NAA, the driver 25 (common signal supply unit) is disposed in one of the parts A1 and A2 disposed in a form sandwiching the display area AA. . The driver 25 has a function of supplying an image signal to each source wiring 22, a function of supplying a position detection signal (touch signal) to each position detection electrode 27 through each first wiring 35 (described later), and each position detection electrode 27 has a function of supplying a common signal (common signal). Further, in one portion A1 in the non-display area NAA, a first trunk wiring 31 extending along the X-axis direction is disposed. Both ends of the first main wiring 31 are connected to the driver 25, and the driver 25 supplies the common signal to the first main wiring 31.

In the other portion A2 of the non-display area NAA, a second trunk wiring 32 extending along the X-axis direction is disposed. Further, on the glass substrate 29, a first wiring 35 (touch sensor line) for connecting the driver 25 and the second trunk wiring 32 in a manner of passing through the display area AA is disposed. A plurality of first wires 35 are provided corresponding to each of the plurality of position detection electrodes 27. The first wiring 35 is connected to the position detection electrode 27 via the contact hole C1 at an intermediate portion in the extending direction (Y-axis direction) with respect to the position detection electrode 27. In the following description, the portion from the driver 25 to the position detection electrode 27 in the first wiring 35 is referred to as a first extension portion 36, and the portion from the second trunk wiring 32 to the position detection electrode 27 is a second It is called the extending portion 37. In FIG. 2, the first extending portion 36 is illustrated as a thick line with respect to the second extending portion 37. Further, the second main wiring 32 and the end of the second extended portion 37 on the second main wiring 32 side (the end of the first wiring on the second main wiring side) are connected via the TFT 38 (switching element). It is connected. Here, the middle portion in the extending direction of the first wiring 35 referred to here is a portion between both end portions of the first wiring 35.

As shown in FIGS. 2 and 5, a wire 39 for switching the TFTs 38 collectively is connected to the gate electrode of each TFT 38. As shown in FIG. The wires 39 extend in the X-axis direction, and the lead wires 41 drawn to one portion A1 in the non-display area NAA are connected to both ends of the wires 39, respectively. The lead wire 41 passes outside the gate driver 28 on the glass substrate 29, and a terminal portion 40 is provided at the tip thereof. A control substrate is connected to the terminal portion 40 via the flexible substrate 26. For example, a signal for turning on the TFT 38 is supplied to the wiring 39 in a data writing period (a period for writing a signal for display to each pixel portion PX), and a signal for turning off the TFT 38 is supplied in a sensing period. . Further, as shown in FIG. 5,

openings

33 and 34 are respectively formed in portions of the second main wiring 32 and the wiring 39 overlapping the source wiring 22. Thereby, parasitic capacitance that may occur between the second main wiring 32 (or the wiring 39) and the source wiring 22 is reduced.

Further, as shown in FIG. 2, on the glass substrate 29, a second wiring 42 (common line) for connecting the first main wiring 31 and the second main wiring 32 so as to pass through the display area AA is arranged. ing. In the present embodiment, the total number of position detection electrodes 27 is smaller than the total number of pixel electrodes 16. Specifically, the number of arrangement of position detection electrodes 27 is smaller than the number of arrangement of pixel electrodes 16 (pixel portion PX) in both the X-axis direction (arrangement direction of the plurality of source wirings 22) and the Y-axis direction. It has become. That is, the number of first wires 35 is smaller than the number of source wires 22. In the present embodiment, as shown in FIG. 3, the first wiring 35 and the second wiring 42 are disposed in the same layer as the source wiring 22. A space S2 is provided between the source line 22 and the pixel electrode 16 in which the first line 35 or the second line 42 is disposed. The space S2 is provided for each of the three pixel units PX aligned in the X-axis direction. The first wiring 35 and the second wiring 42 extend in such a manner as to be adjacent to different source wirings 22 respectively, and one first wiring 35 is arranged for every two second wirings 42 in the X-axis direction. ing.

As described above, since the number of arrangement of the position detection electrodes 27 is smaller than the number of arrangement of the pixel electrodes 16 (pixel units PX), the size of the position detection electrodes 27 is larger than the size of the pixel unit PX. For example, while the width in the X-axis direction and the width in the Y-axis direction of the pixel portion PX are several tens μm to one hundred and several tens μm, respectively, the position detection electrode 27 has a side dimension of several mm (for example, about 2 mm to 5 mm). Further, as shown in FIG. 3, the position detection electrode 27 (common electrode 19) has an opening 18 overlapping at least a part of the first wiring 35, and the opening 18 makes the first wiring 35 The parasitic capacitance that may occur between the first wiring 35 and the position detection electrode 27 that is not connected is reduced. Thereby, the detection sensitivity at the time of detecting the input position is improved. Further, the opening 18 is also provided so as to overlap at least a part of the second wiring 42. As shown in FIG. 6, in the present embodiment, the first wiring 35 (not shown in FIG. 6), the second wiring 42, and the source wiring 22 are formed on the glass substrate 29 via the gate insulating film 43. Further, the position detection electrode 27 is formed on the upper layer thereof via the interlayer insulating film 44. Although metal materials, such as Al, Mo, Ti, W, and Cu, can be used as the source wiring 22, the first wiring 35, and the second wiring 42, for example, the invention is not limited thereto.

Next, the effects of this embodiment will be described. In the present embodiment, the common signal supplied from the driver 25 is transmitted from the end of the first wiring 35 on the driver 25 side to the position detection electrode 27 through the first extending portion 36. In addition, the common signal supplied from the driver 25 to the first trunk wiring 31 is transmitted to the second trunk wiring 32 through each second wiring 42, and from the end of the first wiring 35 on the second trunk wiring 32 side, The signal is transmitted to the position detection electrode 27 through the second extending portion 37. When the common signal is supplied to the position detection electrode 27 (data write period), the TFT 38 is on. As described above, the common signal is supplied to one position detection electrode 27 from both end portions (both sides sandwiching the display area AA) of the first wiring 35 so that the common signal is supplied only from the driver 25 side. Compared to the configuration, it is possible to suppress the occurrence of variations in the potentials of the position detection electrodes 27 due to the distance between the driver 25 and the position detection electrodes 27, and to improve the display quality.

Further, by turning off the TFT 38, the supply of the common signal from the second main wiring 32 to the position detection electrode 27 can be stopped. Thereby, when driving the position detection electrode 27 (sensing period), the detection accuracy of the input position by the position input body can be further enhanced by stopping the supply of the common signal.

The source wiring 22, the first wiring 35, and the second wiring 42 are disposed in the same layer. Therefore, the source wiring 22, the first wiring 35, and the second wiring 42 can be formed in the same process. In addition, the number of arrangement of the position detection electrodes 27 (the number of first wirings 35) is smaller than the number of arrangement of the pixel electrodes 16 (the number of source wirings). For this reason, the source wiring 22 in which the first wiring 35 is not adjacent (in other words, an extra space S2 in which the first wiring 35 is not disposed) is generated. Therefore, if the second wiring 42 is arranged adjacent to the source wiring 22 not adjacent to the first wiring 35 (arranged in the surplus space S2), in the X axis direction (arrangement direction), A situation in which the width of the array substrate 12 is increased can be suppressed. Further, if the second wiring 42 is disposed in the non-display area NAA, the frame becomes large. In the present embodiment, since the second wiring 42 is disposed in the display area AA, the frame can be narrowed.

Second Embodiment
Embodiment 2 of the present invention will be described with reference to FIGS. 7 to 8. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. In the array substrate 112 of the present embodiment, as shown in FIGS. 7 and 8, the second main wiring 32 and each first wiring 35 are connected via the TFT 138 or the TFT 141. A wire 139 extending in the X-axis direction is connected to the gate electrode of each TFT 138, and a wire 140 extending in the X-axis direction is connected to the gate electrode of each TFT 141. The wire 139 is connected to a wire 47 for supplying a scan start signal to the gate driver 28 on the right side in FIG. Further, the wiring 140 is connected to a wiring 47 for supplying a scan start signal to the gate driver 28 on the left side in FIG. 7. That is, the TFT 138 is electrically connected to the gate driver 28 on the right side, and the TFT 141 is electrically connected to the gate driver 28 on the left side.

The TFTs 138 and the TFTs 141 electrically connected to the wiring 47 are configured to be turned on when a scanning start signal is input to the wiring 47 (as a result, the gate driver 28). As described above, when the TFT 138 or the TFT 141 is configured to be turned on by using the scan start signal, the dedicated wiring for switching the TFT 138 and the TFT 141 (lead wire 41 of Embodiment 1; see FIG. 2) is eliminated. Therefore, the frame area can be made smaller in the X-axis direction. In the present embodiment, since the pair of the TFT and the wiring is provided because the pair of left and right gate drivers 28 is provided, the present invention is not limited to this. One set or three or more sets of TFTs and wirings may be provided. In addition, the

TFTs

138 and 141 may be turned on using another signal (for example, a clock signal or the like) supplied to the gate driver 28. The

TFTs

138 and 141 may be turned on using a signal for resetting a specific node in the shift register of the gate driver 28. In addition, the gate driver 28 may have a dummy shift register stage (shift register stage not connected to the gate wiring 20), and the output signal from the shift register stage is used to turn on the

TFTs

138 and 141. It is also good.

Embodiment 3
Embodiment 3 of the present invention will be described with reference to FIG. The same parts as those of the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. In the array substrate 212 of the present embodiment, as shown in FIG. 9, an inspection circuit portion 213 for inspecting the source wiring 22 and the like is provided on the glass substrate 29. Each source wire 22 is electrically connected to the test circuit unit 213. The inspection circuit portion 213 is monolithically formed on the array substrate 212 based on the same semiconductor film as the TFT. The inspection circuit portion 213 has a long shape in the X-axis direction, and a wiring 215 having a terminal portion 214 for inspection is connected to both ends thereof. In the present embodiment, the inspection circuit unit 213 is formed in the mounting area of the driver 25, but the arrangement location can be changed as appropriate. For example, the inspection circuit unit 213 is between the driver 25 and the display area AA. It may be located at

Further, in the present embodiment, the third wiring 233 connected to both the first main wiring 31 and the second main wiring 32 is provided. The third wiring 233 extends along the Y-axis direction, and is disposed between the gate driver 28 and the position detection electrode 27. The third wire 233 has a terminal portion 234 disposed in one portion A1. The flexible substrate 26 is connected to the terminal portion 234, and a common signal is input from an external signal supply source (for example, a driver mounted on the flexible substrate 26) via the flexible substrate 26. That is, in the present embodiment, the terminal unit 234 and the driver 25 constitute a common signal supply unit capable of supplying a common signal to the position detection electrode 27. Further, in the present embodiment, the second main wiring 32 is provided with the terminal portion 236 and the wiring 235 capable of supplying a common signal from an external signal supply source. The wiring 235 extends along the Y-axis direction, and is disposed, for example, outside the wiring 47 for supplying a scan start signal to the gate driver 28. Although the frame becomes large by arranging the wiring 235 and the third wiring 233 in the non-display area NAA, the dullness of the common signal can be reduced by providing the second wiring 42, so that the wiring can be reduced. The line width of the H.235 and the third wiring 233 can be made relatively small.

In the present embodiment, disconnection of each wiring (the first trunk wiring 31, the second trunk wiring 32, the first wiring 35) is performed by inputting a signal for inspection to each terminal portion provided on the glass substrate 29. It can be inspected. Next, this inspection procedure will be described. First, the light source (backlight) and the polarizing plate are disposed on the back of the liquid crystal panel 10, and the polarizing plate is disposed on the front side (observer) side. In this state, the gate driver 28 is driven to supply, to the gate wiring 20, a signal that turns on the TFT 15 of each pixel section PX in the display area. Specifically, for example, a signal (for example, a constant potential of 15 V) for turning on the TFT 15 is supplied to each of the terminal portions 46. Further, a signal (for example, a constant potential of 5 V) is input to the source wiring 22 from the inspection terminal unit 214 via the inspection circuit unit 213.

Further, to each terminal portion 46 connected to the

wires

139 and 140, a signal is supplied such that the

TFTs

138 and 141 are in an on state for a certain period. Then, a test signal (for example, 0 to 5 V) is input to at least one of the terminal portion 234 and the terminal portion 236. In this way, if there is a break in the first wiring 35, the display (gradation change) of the pixel portion PX related to the position detection electrode 27 connected to the first wiring 35 is different from that of the other pixel portions PX. It will be a different display. As a result, the disconnection of the first wiring 35 can be detected by the observer visually confirming the display abnormality. Further, disconnection of the gate wiring 20 and the source wiring 22 can also be detected by the observer visually checking the display abnormality.

Other Embodiments
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiments, the liquid crystal panel is illustrated as the display panel. However, the present technology can be applied to other types of display panels.
(2) In the above-described embodiments, the touch panel pattern is a self-capacitance system. However, the touch panel patterns may be a mutual capacitance system.
(3) The specific planar shapes of the pixel electrode, the gate wiring, the source wiring, the TFT and the like are not limited to those exemplified in the above embodiment, and can be appropriately changed.
(4) In the above embodiment, the gate driver 28 is formed monolithically on the glass substrate 29. However, the gate driver 28 is configured in the form of a driver chip and mounted on the glass substrate 29. It is also good.
(5) The shape of the pixel overlap opening 17 formed in the common electrode 19 can be changed as appropriate, and may be V-shaped, for example. In addition, the number of pixel overlapping openings 17 overlapping with each pixel electrode 16 may not be plural, and may be at least one.
(6) Although the first wiring 35, the second wiring 42, and the source wiring 22 are arranged in the same layer, they may not necessarily be formed of the same material. For example, the first wiring 35 may be formed by laminating the material forming the source wiring 22 and the material forming the pixel electrode 16.
(7) In the first embodiment, the common signal is supplied from the driver 25. In the third embodiment, the common signal is supplied from the driver 25 and the terminal portion (the terminal portion 234 or the terminal portion 236). Although the configuration is illustrated, it is not limited thereto. For example, the common signal may be supplied only from the terminal unit. That is, the common signal supply unit may be configured only by the terminal unit. Further, the common signal may be supplied from the terminal portion 234 only to the first main wiring 31. Further, the number of drivers 25 can be changed as appropriate.
(8) In the above embodiment, even if a driver having a function of supplying an image signal to the source wiring 22 and a driver having a function of supplying a touch signal (position detection signal) to the position detection electrode 27 are separately provided. Good.

DESCRIPTION OF SYMBOLS 10 liquid crystal panel (display panel) 16 pixel electrode 19 common electrode 20 gate wiring 22 source wiring 25 driver (common signal supply part) 27 position detection electrode 28 gate driver 29: glass substrate (substrate), 31: first trunk wiring, 32: second trunk wiring, 35: first wiring, 38: TFT (switching element), 42: second wiring, 234: arranged in one part Terminal portion (common signal supply portion), 233 ... third wiring, AA ... display area, NAA ... non-display area, A1 ... one of a pair of parts, A2 ... the other of a pair of parts

Claims

A substrate divided into a display area capable of displaying an image and a non-display area surrounding the display area;
A plurality of pixel electrodes disposed in the display area;
A plurality of position detection electrodes which are arranged in a matrix in the display area and detect an input position by a position input body, and which constitute a plurality of common electrodes arranged to overlap with the plurality of pixel electrodes Position detection electrode,
A common signal supply unit which is disposed in one of a pair of portions disposed so as to sandwich the display area in the non-display area, and which can supply a common signal to the position detection electrode;
A first main wire disposed in the one portion and supplied with a common signal from the common signal supply unit;
A second trunk wire disposed in the other of the pair of parts;
A first wiring which is disposed to pass through the display area, connects the common signal supply unit and the second main wiring, and is connected to the position detection electrode at an intermediate portion in the extending direction;
A display panel comprising: a plurality of second wirings disposed so as to pass through the display area and disposed in the same layer as the first wiring and connecting the first trunk wiring and the second trunk wiring.
The common signal supply unit has a function of supplying a common signal to each of the plurality of position detection electrodes through each of the plurality of first wirings, and the plurality of positions through each of the plurality of first wirings. The display panel according to claim 1, having a function of supplying a position detection signal to each of the detection electrodes.
The display panel according to claim 1, wherein the second main wiring and an end of the first wiring on the second main wiring side are connected via a switching element.
A gate line disposed in the display area and connected to the pixel electrode;
And a gate driver disposed in the non-display area and electrically connected to the gate wiring.
The display panel according to claim 3, wherein the switching element is electrically connected to the gate driver.
5. The display panel according to claim 4, wherein the switching element is electrically connected to a wire for supplying a scan start signal to the gate driver.
A source line disposed in the display area and connected to the pixel electrode;
The arrangement number of the position detection electrodes in the arrangement direction of the plurality of source wirings is smaller than the arrangement number of the pixel electrodes in the arrangement direction,
The first wire is disposed in the same layer as the source wire, and extends adjacent to the source wire,
The second wiring is disposed in the same layer as the source wiring, and the first wiring extends adjacent to the source wiring which is not adjacent to the first wiring. Display panel described in.
The terminal according to any one of claims 1 to 6, further comprising a third wiring connected to both the first main wiring and the second main wiring while having a terminal portion disposed in the one portion. Display panel.