JP2019174831A - Liquid crystal display device - Google Patents

Abstract

To provide a liquid crystal display device having good display quality.SOLUTION: A liquid crystal display device according to one embodiment comprises three color pixels arranged in a first picture element, four video signal lines partitioning the three color pixels in a first direction and one sensor wiring overlapping the first color picture element and arranged in parallel with the video signal lines. The three color pixels consist of a first color pixel, a second color pixel and a third color pixel. The four video signal lines consist of first, second, third and fourth video signal lines. The first color pixel is located between the first and second video signal lines, the second color pixel is located between the second and third video signal lines, and the third color pixel is located between the third and fourth video signal lines. The sensor wiring overlaps the second video signal line but does not overlap the first, third and fourth video signal lines.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a liquid crystal display device.

  In recent years, flat display devices have been actively developed, and among them, liquid crystal display devices have been applied to various fields by taking advantage of features such as light weight, thinness, and low power consumption. Such a liquid crystal display device has a configuration in which a liquid crystal layer is held between a pair of substrates, and displays an image by controlling a modulation rate for light passing through the liquid crystal layer by an electric field between a pixel electrode and a common electrode. Is.

  The liquid crystal display device includes a method in which a vertical electric field in a direction substantially orthogonal to the substrate surfaces of a pair of substrates is applied to the liquid crystal layer to control the alignment state of the liquid crystal, and a horizontal electric field in a direction substantially parallel to the substrate surfaces of the pair of substrates. A method of controlling the alignment state of the liquid crystal by applying (including a fringe electric field) to the liquid crystal layer is known.

  A liquid crystal display device using a lateral electric field has attracted particular attention from the viewpoint of wide viewing angle. A horizontal electric field type liquid crystal display device such as an in-plane switching (IPS) mode or a fringe field switching (FFS) mode includes a pixel electrode and a common electrode formed on an array substrate, and is arranged with respect to the main surface of the array substrate. The liquid crystal molecules are switched by a substantially parallel lateral electric field.

  There has also been proposed a liquid crystal display device having a contact sensor that detects that a user's finger or pen tip has touched the display unit. The contact sensor may be formed by further overlapping a sensor substrate having a sensor electrode on the display portion of the liquid crystal display device, or the sensor electrode may be integrally formed on one of the pair of substrates of the liquid crystal display device.

JP 2010-231773 A

  An alignment film is disposed on the surfaces of the pair of substrates that are in contact with the liquid crystal layer. The surface of the alignment film is subjected to an alignment process such as a rubbing process or an optical alignment process. The initial alignment direction of the liquid crystal molecules contained in the liquid crystal layer is defined by the alignment treatment direction of the alignment film.

  When a plurality of conductive layers and insulating layers are stacked on one substrate, a step is generated on the surface of the substrate along the pattern end portions of the conductive layers and insulating layers. The alignment film disposed at the step is not subjected to the alignment treatment, and a non-alignment region may occur in the liquid crystal layer near the step. The non-alignment region is a region in which the liquid crystal molecules are not controlled in a desired alignment direction. When light leakage occurs in the non-alignment region, the contrast is lowered and the display quality may be lowered.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device with good display quality.

  In one embodiment, the liquid crystal display device includes three color pixels arranged in the first picture element, four video signal lines partitioning the three color pixels in the first direction, and the first picture element. , One sensor wiring parallel to the video signal line, and the three color pixels are a first color pixel, a second color pixel, and a third color pixel, and the four video signals The lines are first, second, third and fourth video signal lines, the first color pixel is between the first and second video signal lines, and the second color pixel is the second and the second. Between the third video signal lines, the third color pixel is between the third and fourth video signal lines, and the sensor wiring overlaps the second video signal line, and the first, third, fourth, The configuration does not overlap the video signal line.

It is a perspective view for demonstrating the example of 1 structure of the liquid crystal display device of embodiment. It is a figure which shows an example of the cross section in line | wire II-II of the liquid crystal display device shown in FIG. FIG. 2 is a plan view for explaining a configuration example of a display area of the liquid crystal display device shown in FIG. 1. FIG. 2 is a plan view for explaining a configuration example of sensor electrodes arranged in a display area of the liquid crystal display device shown in FIG. 1. It is a figure which shows an example of the cross section in the direction substantially parallel to the scanning line in the 2nd sensor vicinity of the sensor electrode of an array board | substrate. It is a top view for demonstrating one structural example of the display area of the liquid crystal display device of a comparative example.

Hereinafter, a liquid crystal display device according to an embodiment will be described with reference to the drawings.
FIG. 1 schematically shows an example of the liquid crystal display device of the present embodiment. The liquid crystal display device includes an array substrate 110, a counter substrate 120 disposed opposite to the array substrate 110 with a predetermined gap, and a liquid crystal layer 70 sandwiched between the array substrate 110 and the counter substrate 120 (shown in FIG. 2). And a display region 25 including display pixels PX arranged in a matrix, and a backlight unit 130 that illuminates the liquid crystal display panel from the back side.

  FIG. 2 shows an example of a cross section taken along II-II of the liquid crystal display panel shown in FIG. The liquid crystal display device of the present embodiment is an FFS mode liquid crystal display device that controls the alignment state of a liquid crystal layer using a lateral electric field.

  The array substrate 110 includes a transparent insulating substrate 10 such as glass, a pixel driving wiring disposed on the transparent insulating substrate 10, a switching element 14, insulating films L1 and 50, a planarizing film 20, and a common electrode. (First electrode) 30, sensor electrode (second electrode) 40, pixel electrode (third electrode) 60, alignment film (not shown), and drive circuit. The pixel drive wiring includes a scanning line 11 extending along a row where a plurality of display pixels PX are arranged, and a signal line 12 extending along a column where the plurality of display pixels PX are arranged.

  The drive circuit includes a scan line drive circuit YD that drives a plurality of scan lines 11 arranged in a frame area surrounding the display area 25, and a signal line drive circuit XD that drives a plurality of signal lines 12. Yes.

  The scanning line driving circuit YD is disposed on both sides of the display area 25 in the direction in which the scanning line 11 extends, and a plurality of scanning lines 11 extending from the display area 25 are electrically connected to the scanning line driving circuit YD. A plurality of signal lines 12 extending from the display area 25 are electrically connected to the signal line driving circuit XD.

  A flexible substrate (not shown) is connected to the end of the array substrate 110, and a control signal and a video signal are supplied from a signal source (not shown) to the scanning line drive circuit YD and the signal line drive circuit XD via the flexible substrate.

  The scanning lines 11 extend along the rows of display pixels PX arranged in a matrix in the display area 25. The signal lines 12 extend along the columns of display pixels PX arranged in a matrix in the display area 25.

  The switching element 14 is disposed in the vicinity of the position where the scanning line 11 and the signal line 12 intersect. The switching element 14 is disposed on an undercoat layer (not shown) disposed on the transparent insulating substrate 10, and includes an amorphous silicon or polysilicon semiconductor layer SC, a gate electrode 14b, a source electrode 14a, and a drain electrode 14c. , Including a thin film transistor.

  A gate insulating film is disposed above the semiconductor layer SC of the switching element 14, and a gate electrode 14b of the switching element 14 is disposed on the gate insulating film. The source electrode 14a and the drain electrode 14c of the switching element 14 are connected to the semiconductor layer SC through a contact hole provided in the insulating film L1.

  The gate electrode 14b of the switching element 14 is electrically connected to the corresponding scanning line 11 (or formed integrally). The source electrode 14a of the switching element 14 is electrically connected to the corresponding signal line 12 (or formed integrally). The drain electrode 14c of the switching element is electrically connected to the corresponding pixel electrode 60 in contact holes 21 and 51 described later.

  When the scanning line 11 is driven by the scanning line driving circuit YD and a voltage is applied to the gate electrode 14b of the switching element 14, the source electrode 14a and the drain electrode 14c are electrically connected, and the switching element 14 is in an on state for a certain period. It becomes. A video signal is supplied from the signal line 12 to the pixel electrode 60 via the switching element 14 during a period in which the switching element 14 is in the on state.

  A planarizing film 20 is disposed on the switching element 14. In the present embodiment, the planarizing film 20 is a transparent organic insulating film, and the thickness of the planarizing film 20 is approximately 3 μm. The planarizing film 20 is arranged over the entire display area 25 except for the contact holes 21. The planarizing film 20 on the drain electrode 14c of the switching element 14 is provided with a contact hole 21 for electrical connection with a pixel electrode 60 described later. A common electrode 30 is disposed on the planarizing film 20.

FIG. 3 shows an example of the configuration of the display area 25 of the array substrate 110. In FIG. 3, the pixel electrode 60 and the sensor electrode 40 are partially omitted, and the shape of the common electrode 30 is shown.
In the case of a color display type liquid crystal display device, the plurality of display pixels PX include a plurality of types of color pixels. In the present embodiment, the plurality of display pixels PX include a red display pixel PXR that displays red, a green display pixel PXG that displays green, and a blue display pixel PXB that displays blue. One picture element is constituted by three kinds of color pixels, that is, the red display pixel PXR, the green display pixel PXG, and the blue display pixel PXB. In the display area 25, red display pixels PXR, green display pixels PXG, and blue display pixels PXB are periodically arranged in the direction in which the scanning lines 11 extend, and the same type of signal lines 12 extends in the direction. Color pixels are arranged side by side.

  The common electrode 30 is formed of a transparent electrode material such as ITO (indium tin oxide) or IZO (indium zinc oxide). The common electrode 30 disposed at the end of the display region 25 is disposed so as to extend to the frame region, and a common voltage is applied from an external signal source through a flexible substrate, for example.

  The common electrode 30 is also formed so as to include the same pattern in consideration of overlay accuracy with the sensor electrode 40 described later. That is, the common electrode 30 is disposed so as to face the plurality of pixel electrodes 60. The common electrode 30 is arranged to face the three pixel electrodes 60 arranged in one picture element.

  Further, a connection electrode 31 made of the same material as the common electrode 30 is disposed in the contact hole 21. The drain electrode 14 c of the switching element 14 and the connection electrode 31 are electrically connected in the contact hole 21.

  FIG. 4 is a plan view for explaining a configuration example of the sensor electrode 40. In FIG. 4, the pattern shapes of the common electrode 30 and the connection electrode 31 are indicated by broken lines. A sensor electrode 40 is disposed on the common electrode 30.

  The sensor electrode 40 is a multilayer electrode of aluminum and molybdenum, for example. The thickness of the molybdenum layer of the sensor electrode 40 is preferably 10 nm or more and 50 nm or less, and the thickness of the aluminum layer is preferably 100 nm or more and 400 nm or less. The sensor electrode 40 includes two molybdenum layers and an aluminum layer disposed between these molybdenum layers, and has a thickness of 120 nm to 500 nm.

  The sensor electrodes 40 are arranged in a grid including a first sensor 40A extending substantially parallel to the direction in which the scanning line 11 extends and a second sensor 40B extending substantially parallel to the direction in which the signal line 12 extends, and a plurality of common electrodes 30 are electrically connected. In the present embodiment, the width of the second sensor in the direction in which the scanning line 11 extends and the width of the first sensor in the direction in which the signal line 12 extends are approximately 5 μm. It is desirable that the sensor electrode 40 be disposed on a flat portion without a step on the common electrode 30 in the display region 25.

  The second sensor 40B is arranged between predetermined color pixels of the red display pixel PXR, the green display pixel PXG, and the blue display pixel PXB that are periodically arranged in the direction in which the scanning line 11 extends in the display region 25. It is arranged in the upper layer of the signal line 12. In the present embodiment, the second sensor 40B is disposed between the red display pixel PXR and the blue display pixel PXB, and between the blue display pixel PXB and the green display pixel PXG.

  The sensor electrode 40 extends from the display area 25 to the frame area, and is electrically connected to, for example, a sensing circuit (not shown) provided outside. When the touch position is detected by the liquid crystal display device of the present embodiment, the sensing circuit supplies a signal having a predetermined waveform to the sensor electrode 40. The magnitude of the capacitance generated between the fingertip or the like and the sensor electrode 40 varies depending on the distance between the user's fingertip or pen tip and the sensor electrode 40. The sensing circuit detects a change in the potential of the sensor electrode 40 due to a change in capacitance between the fingertip or the like and the sensor electrode 40 from the output waveform of the signal output from the sensor electrode 40, and the user's fingertip or pen tip or the like. The coordinate position of the sensor electrode 40 corresponding to the position touched by is detected.

  An insulating film 50 is disposed on the sensor electrode 40. The insulating film 50 includes a contact hole 51 for electrically connecting the pixel electrode 60 and the connection electrode 31.

  A pixel electrode 60 is disposed on the insulating film 50 and is electrically connected to the connection electrode 31 in the contact hole 51. The pixel electrode 60 is formed of a transparent electrode material such as ITO or IZO, for example. An alignment film (not shown) is disposed on the pixel electrode 60.

  As shown in FIG. 3, the pixel electrode 60 includes slits 60S extending substantially in parallel with each other. In the present embodiment, the plurality of slits 60S extend substantially parallel to the direction in which the signal line 12 extends.

  The alignment state of the liquid crystal layer 70 is controlled by an electric field generated between the pixel electrode 60 and the common electrode 30 or between the end of the pixel electrode 60 and the sensor electrode 40. By providing the slit 60S in the pixel electrode 60, an electric field is generated between the pixel electrode 60 and the common electrode 30 also in the central portion of the display pixel PX, and the alignment state of the liquid crystal layer 70 can be controlled.

  The counter substrate 120 includes a transparent insulating substrate 28 such as glass, a transparent resin planarizing film 29, a plurality of colored layers, and an alignment film (not shown).

  The plurality of colored layers are a first colored layer 24a, a second colored layer 24b, and a third colored layer that are colored with any one of red (R), green (G), and blue (B), which are organic insulating films. A colored layer 24c, a black fourth colored layer 27a, and a fifth colored layer 27b are provided.

  The red first colored layer 24a is disposed in the red display pixel PXR, the green second colored layer 24b is disposed in the green display pixel PXG, and the blue third colored layer 24c is disposed in the blue display pixel PXB. The fourth colored layer 27a is a light shielding layer that is disposed so as to surround the display region 25 and prevents light from being lost in the frame region. The fifth colored layer 27b is a light shielding layer that is arranged in a grid pattern at positions facing the scanning lines 11 and the signal lines 12 of the array substrate 110, and prevents light leakage between the display pixels PX.

  An alignment film is disposed on the pixel electrode 60 of the array substrate 110 and the transparent resin planarization film 29 of the counter substrate 120. The surface of the alignment film is subjected to an alignment process such as a rubbing process or an optical alignment process.

  The array substrate 110 and the counter substrate 120 are arranged so that their alignment films face each other, and are fixed by the sealant 26. A columnar spacer 22 is disposed between the array substrate 110 and the counter substrate 120. The columnar spacer 22 keeps the distance between the array substrate 110 and the counter substrate 120 constant. In the present embodiment, the height of the columnar spacer 22 is arbitrarily controlled between 2 μm and 6 μm.

  The liquid crystal layer 70 is disposed in a region surrounded by the array substrate 110, the counter substrate 120, and the sealant 26.

  Polarizing plates (not shown) are disposed on the surfaces of the array substrate 110 and the counter substrate 120 opposite to the liquid crystal layer 70 side.

Then, an example of the manufacturing method of the liquid crystal display device of this embodiment is demonstrated.
First, a method for forming the array substrate 110 will be described. The switching element 14, the scanning line 11, the signal line 12, the insulating film L 1, and other switching on the array substrate 110 are repeated by forming and patterning the first transparent insulating substrate from which the plurality of array substrates 110 are cut out. Elements and various wirings are formed.

  Subsequently, a planarizing film 20 is formed by applying, exposing and developing an exposure resist. At this time, the exposure resist is applied to the entire surface of the display area 25 and the frame area. In this embodiment, a photo-curable resist is used as the exposure resist, and the photoresist is exposed through an exposure mask and developed to form a planarized film 20 having a predetermined pattern having contact holes 21.

  A transparent electrode material such as ITO is formed on the planarizing film 20, and an exposure resist is further applied on the transparent electrode material. The exposure resist is exposed and developed, and patterned into a predetermined pattern of the connection electrode 31 and the common electrode 30. Subsequently, the transparent electrode material is patterned by etching, and the exposure resist is peeled off to form the common electrode 30 having a predetermined pattern.

  Subsequently, molybdenum film formation, aluminum film formation, and molybdenum film formation are performed on the upper layer of the common electrode 30 to pattern these multilayer metal layers. The electrode pattern formed by laminating aluminum and molybdenum disposed on the common electrode 30 is divided into a plurality of groups to form the sensor electrode 40.

  Subsequently, an exposure resist is applied, exposed and developed on the sensor electrode 40 to form the insulating film 50 having the contact holes 51. Subsequently, a transparent electrode material such as ITO is formed on the insulating film 50, and is patterned into a predetermined pattern including slits 60S to form the pixel electrode 60. Thereafter, an alignment film 80 is formed on the surface of the array substrate 110 on the pixel electrode 60 by performing an alignment process such as a rubbing process or an optical alignment process in a predetermined direction.

  FIG. 5 shows an example of a cross section of the array substrate 110 in the vicinity of the second sensor 40B of the sensor electrode 40 in a direction substantially orthogonal to the direction in which the second sensor 40B extends. On the surface of the array substrate 110, irregularities are formed along the pattern end portions of the conductive layer and the insulating layer disposed in the lower layer. In particular, irregularities are likely to occur in the upper layers of the pattern end portions of the common electrode 30, the sensor electrode 40, and the pixel electrode 60 disposed in the upper layer of the planarizing film 20. Furthermore, since the sensor electrode 40 is formed of a plurality of conductive layers, the sensor electrode 40 is relatively thicker than the other conductive layers, and a larger step is likely to occur on the pattern end portion of the sensor electrode 40 than other portions. Therefore, the alignment treatment of the alignment film 80 disposed on the pattern end of the sensor electrode 40 may not be performed properly.

  For example, when the alignment film 80 is subjected to a rubbing process, the rubbing cloth does not sufficiently contact the alignment film 80 when the alignment film 80 disposed in the stepped portion is printed on or down with the rubbing cloth. A part A which is not applied is generated. In the vicinity of the portion A where the rubbing treatment of the alignment film 80 is not performed, an initial alignment direction of the liquid crystal molecules is not defined, and a non-alignment region in which the alignment state of the liquid crystal molecules cannot be controlled may occur. For example, when the direction in which the sensor electrode 40 extends and the alignment treatment direction are approximately 90 degrees, a non-alignment region is likely to occur, and when the direction in which the sensor electrode 40 extends and the alignment treatment direction is approximately 40 degrees, the non-alignment region is unlikely to occur. Become.

  When light omission occurs in the non-alignment region, the edge of the display pixel PX in the vicinity of the non-alignment region becomes bright, which causes the contrast of the display image to decrease and the display quality to deteriorate. Here, as shown in FIG. 6, between the red display pixel PXR and the green display pixel PXG, between the green display pixel PXG and the blue display pixel PXB, and between the blue display pixel PXB and the red display pixel PXR. When the second sensor 40B is arranged, a decrease in contrast due to light omission in the non-alignment region is visually recognized in the order of the green display pixel PXG, the red display pixel PXR, and the blue display pixel PXB.

  Therefore, in the present embodiment, the second sensor 40B of the sensor electrode 40 is disposed between the red display pixel PXR and the blue display pixel PXB, and between the blue display pixel PXB and the green display pixel PXG, and the red display pixel PXR The second sensor 40B is not disposed between the green display pixel PXG. As a result, it is possible to provide a liquid crystal display device with excellent display quality by suppressing light dropout in the green display pixel PXG and the red display pixel PXR and lowering the contrast.

  In the present embodiment, the second sensor 40B of the sensor electrode 40 is disposed between the red display pixel PXR and the blue display pixel PXB, and between the blue display pixel PXB and the green display pixel PXG. In the sensor 40B, the second sensor 40B may be disposed only between the red display pixel PXR and the blue display pixel PXB, and the second sensor 40B is disposed only between the blue display pixel PXB and the green display pixel PXG. Also good.

  If the second sensor 40B is arranged only between the red display pixel PXR and the blue display pixel PXB, it is possible to further suppress the decrease in contrast in the green display pixel PXG where the decrease in contrast is most remarkable. A good liquid crystal display device can be provided.

  When the second sensor 40B is disposed only between the blue display pixel PXB and the green display pixel PXG, it is possible to further suppress a decrease in contrast in the red display pixel PXR, and to provide a liquid crystal display device with better display quality. It becomes possible.

  The number of second sensors 40B is preferably designed according to the resolution of the display area and the detection accuracy of the contact position.

  Next, a method for forming the counter substrate 120 will be described. On the second transparent insulating substrate from which the plurality of counter substrates 120 are cut, a colored exposure resist is applied, exposed, and developed repeatedly to obtain a first colored layer 24a, a second colored layer 24b, a third colored layer 24c, The fourth colored layer 27a and the fifth colored layer 27b are formed. Further, a transparent resin material that becomes the transparent resin flattening film 29 is applied on the plurality of colored layers, and patterned into a predetermined pattern to form the transparent resin flattening film 29. Thereafter, an alignment film is formed on the surface of the transparent resin flattening film 29 by performing an alignment process such as a rubbing process or an optical alignment process in a predetermined direction.

  The columnar spacers 22 are formed by applying, for example, a resin material on the upper layer of the first transparent insulating substrate or the second transparent insulating substrate and patterning it into a predetermined pattern.

  Subsequently, a sealing agent 26 made of, for example, an ultraviolet curable resin is applied on the first transparent insulating substrate or the second transparent insulating substrate so as to surround the display region 25, and the transparent insulating substrate to be a plurality of array substrates 110 And the transparent insulating substrate to be a plurality of counter substrates 120 are aligned so that the alignment films face each other, and the sealing agent 26 is cured by being irradiated with ultraviolet rays and fixed.

  The liquid crystal material may be injected into the display region 25 from the injection port in which the sealing agent 26 is opened, and is surrounded by the sealing agent 26 before the first transparent insulating substrate and the second transparent insulating substrate are bonded together. It may be dripped into the area. When the liquid crystal material is injected from the injection port, the liquid crystal layer 70 is formed by sealing the injection port with a sealant after the injection. When the liquid crystal material is dropped, the liquid crystal layer 70 is formed by bonding the first transparent insulating substrate and the second transparent insulating substrate after the dropping.

  In a state where the first transparent insulating substrate and the second transparent insulating substrate are bonded together, the plurality of array substrates 110 and the portion of the second transparent insulating substrate facing the array substrate 110 are cut out, and further the second transparent The counter substrate 120 is cut out by cleaving the insulating substrate.

  Subsequently, a polarizing plate is provided on the surface of the array substrate 110 and the counter substrate 120 opposite to the liquid crystal layer 70 side to form a liquid crystal display device.

  As described above, according to the present embodiment, since the second sensor 40B is not disposed between the red display pixel PXR and the green display pixel PXG, the contrast of the green display pixel PXG and the red display pixel PXR is reduced. Is suppressed, and a liquid crystal display device with good display quality can be provided.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  PX ... display pixel, PXR ... red display pixel, PXG ... green display pixel, PXB ... blue display pixel, 25 ... display region, 30 ... common electrode (first electrode), 40 ... sensor electrode (second electrode), 40A ... First sensor, 40B ... second sensor, 50 ... insulating film, 51 ... contact hole, 60 ... pixel electrode (third electrode), 60S ... slit, 70 ... liquid crystal layer, 80 ... alignment film, 110 ... array substrate (first) 1 substrate), 120... Counter substrate (second substrate), 130... Backlight unit.

Claims (6)

Three color pixels arranged in the first picture element;
Four video signal lines that divide the three color pixels in the first direction;
One sensor wiring overlapping the first picture element and parallel to the video signal line,
The three color pixels are a first color pixel, a second color pixel adjacent to the first color pixel, and a third color pixel adjacent to the second color pixel,
The four video signal lines are a first video signal line, a second video signal line, a third video signal line, and a fourth video signal line,
The first color pixel is between the first video signal line and the second video signal line;
The second color pixel is between the second video signal line and the third video signal line;
The third color pixel is between the third video signal line and the fourth video signal line;
The sensor wiring overlaps the second video signal line and does not overlap the first, third, and fourth video signal lines.
Liquid crystal display device. Three color pixels arranged in the first picture element;
Four video signal lines that divide the three color pixels in the first direction;
One sensor wiring overlapping the first picture element and parallel to the video signal line,
The three color pixels are a first color pixel, a second color pixel adjacent to the first color pixel, and a third color pixel adjacent to the second color pixel. The four video signal lines are: A first video signal line, a second video signal line, a third video signal line and a fourth video signal line;
The first color pixel is between the first video signal line and the second video signal line;
The second color pixel is between the second video signal line and the third video signal line;
The third color pixel is between the third video signal line and the fourth video signal line;
The sensor wiring overlaps the third video signal line and does not overlap the first, second, and fourth video signal lines.
Liquid crystal display device. The first color pixel displays red,
The second color pixel displays blue,
The third color pixel displays green;
The liquid crystal display device according to claim 1. The first picture element includes a first pixel electrode of the first color pixel, a second pixel electrode of the second color pixel,
A third pixel electrode of the third color pixel, and a first common electrode overlapping the first, second, and third pixel electrodes,
The first common electrode is formed in an island shape in the first picture element.
The liquid crystal display device according to claim 1. Furthermore, the first picture element comprises a second picture element adjacent in the first direction,
The second picture element includes the first common electrode and an island-shaped second common electrode adjacent in the first direction,
The first common electrode and the second common electrode are separated from each other,
The fourth video signal line overlaps the spaced position;
The liquid crystal display device according to claim 4. Furthermore, an alignment film, an insulating film, and a planarization film are provided,
The four video signal lines and the sensor wiring are insulated by a planarizing film,
The first common electrode, the second common electrode, and the sensor wiring are sandwiched between the planarization film and the insulating film,
The first, second and third pixel electrodes are sandwiched between the insulating film and the alignment film.
The liquid crystal display device according to claim 5.

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