JP6539309B2 - Liquid crystal display - Google Patents

Description

  Embodiments of the present invention relate to a liquid crystal display device.

  In recent years, flat panel display devices have been actively developed, and liquid crystal display devices are applied to various fields, taking advantage of features such as light weight, thinness and low power consumption. Such a liquid crystal display device has a structure in which a liquid crystal layer is held between a pair of substrates, and an electric field between the pixel electrode and the common electrode controls a modulation factor to light passing through the liquid crystal layer to display an image. It is a thing.

  The liquid crystal display device applies a longitudinal electric field in a direction substantially orthogonal to the substrate surface of the pair of substrates to the liquid crystal layer to control the alignment state of the liquid crystal, and a transverse electric field in a direction substantially parallel to the substrate surfaces of the pair of substrates There is known a method of controlling the alignment state of liquid crystal by applying (including a fringe electric field) to a liquid crystal layer.

  Liquid crystal display devices using a lateral electric field are particularly noted from the viewpoint of widening the viewing angle. In-Plane Switching (IPS) mode and Fringe Field Switching (FFS) mode or other horizontal electric field liquid crystal display devices have pixel electrodes and common electrodes formed on the array substrate, and are opposed to the main surface of the array substrate. It is configured to switch liquid crystal molecules in a substantially parallel horizontal electric field.

  In addition, a liquid crystal display device has been proposed which has a contact sensor that detects that the user's finger or pen tip is in contact with the display unit. The contact sensor may be formed by 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 a pair of substrates of the liquid crystal display device.

Unexamined-Japanese-Patent No. 2010-231773

  An alignment film is disposed on the surface of the pair of substrates in contact with the liquid crystal layer. The surface of the alignment film is subjected to alignment processing such as rubbing processing and photo alignment processing. The initial alignment direction of liquid crystal molecules contained in the liquid crystal layer is defined by the alignment processing direction of the alignment film.

  In the case where 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 of the conductive layer or the insulating layer. The alignment film disposed in the step is not subjected to alignment processing, and a non-alignment region may be generated in the liquid crystal layer in the vicinity of the step. The non-alignment region is a region in which the liquid crystal molecules are not controlled to the desired alignment orientation, and when light leakage occurs in the non-alignment region, the contrast may be reduced and the display quality may be deteriorated.

  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.

According to the embodiment, the plurality of scanning lines extending in the first direction, the plurality of video signal lines extending in the second direction crossing the first direction, the plurality of scanning lines and the plurality of video signal lines are electrically Switching elements, a first insulating film disposed on the switching elements, a plurality of pixel electrodes electrically connected to the switching elements, and a plurality of common electrodes When a plurality of metal wiring extending along the plurality of signal lines, a a display device provided in the image display area,
Wherein a plurality of pixel electrodes, wherein a plurality of common electrodes, wherein the plurality of metal wiring is disposed on the first insulating film,
The plurality of pixel electrodes are a first pixel electrode, a second pixel electrode adjacent in the first direction of the first pixel electrode, and a third pixel electrode adjacent in the first direction of the second pixel electrode. Have
The plurality of common electrodes may be a first common electrode facing the first pixel electrode, a second common electrode facing the second pixel and the third pixel, a first common electrode, and a second direction. An adjacent third common electrode, and a fourth common electrode adjacent to the second common electrode in the second direction and adjacent to the third common electrode in the first direction, and the first common electrode and the fourth common electrode The second common electrodes are spaced apart from each other in the first direction, and the third common electrode and the fourth common electrode are spaced apart from each other in the first direction,
Wherein the plurality of metal wiring has a first metal wiring extending in the second direction so as to cross the plurality of scanning lines, and the second metal interconnect, wherein the plurality of metal wiring is the first The first pixel electrode and the second pixel electrode are not formed between the first pixel electrode and the second pixel electrode along the second direction, and the first pixel electrode and the second pixel electrode are formed of the first metal wire and the second metal wire. located between the second metal wiring is formed along the second direction in between the second pixel electrode third pixel electrode,
Wherein said spaced in a second direction the second common electrode 4 common electrode is connected via the second metal wiring,
The first pixel electrode is a pixel electrode of a first color display pixel,
The second pixel electrode is a pixel electrode of a second color display pixel,
The first color is either red or green,
The second color is either green or red different from the first color,
The width of the plurality of metal wires is wider than the distance between the first common electrode and the second common electrode in the first direction,
The display device may have a thickness of the plurality of metal wires greater than a thickness of the scan line and the video signal line .

It is a perspective view for explaining one structural example of a liquid crystal display device of an 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. It is a top view for demonstrating one structural example of the display area of the liquid crystal display device shown in FIG. It is a top view for demonstrating one structural example of the sensor electrode arrange | positioned in the display area of the liquid crystal display device shown in FIG. 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 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, the liquid crystal display device of the 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. In the liquid crystal display device, an array substrate 110 and an array substrate 110, an opposing substrate 120 disposed opposite to each other with a predetermined gap, and a liquid crystal layer 70 sandwiched between the array substrate 110 and the opposing substrate 120 (shown in FIG. And a display area 25 including display pixels PX arranged in a matrix, and a backlight unit 130 for illuminating the liquid crystal display panel from the back side.

  FIG. 2 shows an example of a cross section taken along line 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 in which the alignment state of the liquid crystal layer is controlled using a lateral electric field.

  The array substrate 110 includes a transparent insulating substrate 10 such as glass, a pixel drive 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. A (first electrode) 30, a sensor electrode (second electrode) 40, a pixel electrode (third electrode) 60, an alignment film (not shown), and a drive circuit are provided. The pixel drive wiring includes a scanning line 11 extending along a row in which a plurality of display pixels PX are arranged, and a signal line 12 extending along a column in which a plurality of display pixels PX are arranged.

  The drive circuit includes a scan line drive circuit YD for driving the plurality of scan lines 11 arranged in a frame area surrounding the periphery of the display area 25 and a signal line drive circuit XD for driving the plurality of signal lines 12. There is.

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

  A flexible substrate (not shown) is connected to an end of the array substrate 110, and control signals and video signals are supplied to the scanning line drive circuit YD and the signal line drive circuit XD from a signal source (not shown) 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 a semiconductor layer SC of amorphous silicon or polysilicon, a gate electrode 14b, a source electrode 14a, and a drain electrode 14c. And a thin film transistor including the

  A gate insulating film is disposed on 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 in a contact hole provided in the insulating film L1.

  The gate electrode 14 b of the switching element 14 is electrically connected to (or integrally formed with) the corresponding scanning line 11. The source electrode 14 a of the switching element 14 is electrically connected (or integrally formed) with the corresponding signal line 12. The drain electrode 14 c 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 drive 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 conduct, and the switching element 14 is on 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 while the switching element 14 is in the on state.

  A planarization 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 film thickness of the planarizing film 20 is approximately 3 μm. The planarization film 20 is disposed over the entire display area 25 except for the contact holes 21. In the planarization film 20 on the drain electrode 14c of the switching element 14, a contact hole 21 for electrically connecting to a pixel electrode 60 described later is provided. The common electrode 30 is disposed on the planarization film 20.

FIG. 3 shows an example of the configuration of the display area 25 of the array substrate 110. As shown in FIG. 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 liquid crystal display device of a color display type, 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 configured by three color pixels of red display pixel PXR, green display pixel PXG, and 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 in the direction in which the signal lines 12 extend. Color pixels are arranged side by side.

  The common electrode 30 is formed of, for example, 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 area 25 extends to the frame area, and a common voltage is applied from an external signal source via a flexible substrate, for example.

  The common electrode 30 also incorporates and forms the same pattern considering the overlapping accuracy with the sensor electrode 40 described later. That is, the common electrode 30 is disposed to face the plurality of pixel electrodes 60. The common electrode 30 is disposed to face the three pixel electrodes 60 disposed in one pixel.

  Further, in the contact hole 21, a connection electrode 31 formed of the same material as the common electrode 30 is disposed. 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 one configuration example of the sensor electrode 40. As shown in FIG. 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, for example, a multilayer electrode of aluminum and molybdenum. It is desirable that the thickness of the molybdenum layer of the sensor electrode 40 be 10 nm or more and 50 nm or less, and the thickness of the aluminum layer be 100 nm or more and 400 nm or less. The sensor electrode 40 includes two molybdenum layers and an aluminum layer disposed between the 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 lines 11 extend and a second sensor 40B extending substantially parallel to the direction in which the signal lines 12 extend, 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 in a flat portion without a step on the common electrode 30 in the display area 25.

  The second sensor 40B is arranged between the predetermined color pixels of the red display pixel PXR, the green display pixel PXG, and the blue display pixel PXB, which are periodically arranged in the direction in which the scanning line 11 extends in the display area 25. It is disposed 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 of a predetermined waveform to the sensor electrode 40. According to the distance between the user's fingertip or pen tip and the sensor electrode 40, the size of the capacitance generated between the fingertip or the like and the sensor electrode 40 changes. The sensing circuit detects a change in the potential of the sensor electrode 40 due to a change in capacitance between the finger tip or the like and the sensor electrode 40 from an output waveform of a signal output from the sensor electrode 40 to The coordinate position of the sensor electrode 40 corresponding to the contact position is detected.

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

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

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

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

  The plurality of colored layers are formed of a first colored layer 24a, a second colored layer 24b, and a third colored layer colored with a resist selected from red (R), green (G), and blue (B), which are organic insulating films. A colored layer 24c, and 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 27 a is a light shielding layer which is disposed so as to surround the display area 25 and prevents light leakage in the frame area. The fifth colored layer 27 b is a light shielding layer disposed in a grid shape at a position facing the scanning lines 11 and the signal lines 12 of the array substrate 110 to prevent light leakage between the display pixels PX.

  Alignment films are disposed on the pixel electrodes 60 of the array substrate 110 and on the transparent resin flattening film 29 of the counter substrate 120. The surface of the alignment film is subjected to alignment processing such as rubbing processing and optical alignment processing.

  The array substrate 110 and the counter substrate 120 are disposed such that their alignment films face each other, and are fixed by the sealing agent 26. Columnar spacers 22 are disposed between the array substrate 110 and the counter substrate 120. The distance between the array substrate 110 and the counter substrate 120 is held constant by the columnar spacer 22. In the present embodiment, the height of the columnar spacer 22 is arbitrarily controlled at 2 μm or more and 6 μm or less.

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

  On the surface of the array substrate 110 and the opposite substrate 120 opposite to the liquid crystal layer 70 side, polarizing plates (not shown) are respectively disposed.

Subsequently, an example of a method of manufacturing the liquid crystal display device of the present embodiment will be described.
First, a method of forming the array substrate 110 will be described. The film formation and patterning are repeated on the first transparent insulating substrate from which the plurality of array substrates 110 are cut, and the switching elements 14, the scanning lines 11, the signal lines 12, the insulating film L1, and other switching on the array substrate 110 are repeated. Form elements and various wirings.

  Subsequently, an exposure resist is applied, exposed, and developed to form a planarizing film 20. At this time, the exposure resist is applied to the entire surface of the display area 25 and the frame area. In the present embodiment, the exposure resist is a photocurable one, and the photoresist is exposed through an exposure mask and developed to form a planarizing film 20 having a predetermined pattern having the 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 to be patterned into predetermined patterns 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, a film of molybdenum, a film of aluminum, and a film of molybdenum are further formed on the upper layer of the common electrode 30, and patterning of the metal layer of these multilayers is performed. An electrode pattern of aluminum and molybdenum stacked on the common electrode 30 is divided into a plurality of groups to form the sensor electrode 40.

  Subsequently, an exposure resist is applied on the sensor electrode 40, exposed, and developed to form an insulating film 50 having a contact hole 51. Subsequently, a transparent electrode material such as ITO is deposited on the insulating film 50, and patterned into a predetermined pattern including the 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 electrodes 60. The alignment film 80 is subjected to alignment processing such as rubbing processing or optical alignment processing 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 the direction substantially orthogonal to the direction in which the second sensor 40B extends. The surface of the array substrate 110 has irregularities along the pattern end of the conductive layer and the insulating layer disposed in the lower layer. In particular, unevenness tends to occur in the upper layer of the pattern end of the common electrode 30, the sensor electrode 40, and the pixel electrode 60 which are disposed in the upper layer of the planarization 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 step larger than the other portion is likely to occur on the pattern end of the sensor electrode 40. Therefore, the alignment process of the alignment film 80 disposed on the pattern end of the sensor electrode 40 may not be properly performed.

  For example, in the case where the alignment film 80 is subjected to rubbing treatment, when the rubbing film is used to print up or down the alignment film 80 disposed on the step portion, the rubbing film does not contact the alignment film 80 sufficiently. There is a portion A which is not applied. In the vicinity of the portion A where the rubbing process is not performed on the alignment film 80, there may occur a non-alignment region where the initial alignment direction of the liquid crystal molecules is not defined and the alignment state of the liquid crystal molecules can not be controlled. For example, when the sensor electrode 40 extends and the alignment processing direction is approximately 90 degrees, a non-alignment region is likely to occur, and when the sensor electrode 40 extends and the alignment processing direction is approximately 40 degrees, a non-alignment region is less likely to occur. Become.

  If light leakage occurs in this non-alignment area, the end of the display pixel PX near the non-alignment area becomes bright, which causes the contrast of the display image to be reduced and the display quality to be degraded. 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 disposed, the decrease in contrast due to the light leakage 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. The second sensor 40B is not disposed between the green display pixel PXG. As a result, it is possible to suppress the reduction in contrast due to the occurrence of light leakage in the green display pixel PXG and the red display pixel PXR, and it is possible to provide a liquid crystal display device with good display quality.

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 may be disposed only between the blue display pixel PXB and the green display pixel PXG. It is also good.

  If the second sensor 40B is disposed only between the red display pixel PXR and the blue display pixel PXB, it is possible to further suppress the contrast decrease in the green display pixel PXG where the contrast decrease is most remarkable, and the display quality is more improved. It is possible to provide a good liquid crystal display device.

  If 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 the reduction 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 desirably designed in accordance with the resolution of the display area and the detection accuracy of the touch position.

  Next, a method of forming the counter substrate 120 will be described. Application, exposure, and development of a colored exposure resist are repeated on a second transparent insulating substrate from which a plurality of opposing substrates 120 are cut out to form a first colored layer 24a, a second colored layer 24b, a third colored layer 24c, and a third. The fourth colored layer 27a and the fifth colored layer 27b are formed. Further, a transparent resin material to be the transparent resin planarizing film 29 is applied on the plurality of colored layers, and patterned into a predetermined pattern to form the transparent resin planarizing film 29. Thereafter, an alignment film is formed on the surface of the transparent resin planarizing film 29 which has been subjected to alignment processing such as rubbing processing or optical alignment processing in a predetermined direction.

  The columnar spacer 22 is formed, for example, by applying a resin material on the upper layer of the first transparent insulating substrate or the second transparent insulating substrate and patterning it in 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 area 25, to form a plurality of array substrates 110. And the transparent insulating substrate to be the plurality of opposing substrates 120 are opposed to each other so that the alignment films face each other, and the sealing agent 26 is irradiated with ultraviolet rays to be cured and fixed.

  The liquid crystal material may be injected into the display area 25 from the inlet at which the sealing agent 26 is opened, and the liquid crystal material 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 dropped on the area. When a liquid crystal material is injected from the injection port, the injection port is sealed with a sealant after the injection to form the liquid crystal layer 70. When the liquid crystal material is dropped, the first transparent insulating substrate and the second transparent insulating substrate are bonded to each other to form the liquid crystal layer 70.

  In a state where the first transparent insulating substrate and the second transparent insulating substrate are bonded to each other, the plurality of array substrates 110 and a portion of the second transparent insulating substrate facing the array substrate 110 are cut out, and the second transparent The opposing substrate 120 is cut out by cutting the insulating substrate.

  Subsequently, a polarizing plate is provided on the surface of the array substrate 110 and the opposite 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, the contrast is reduced in the green display pixel PXG and the red display pixel PXR by not arranging the second sensor 40B between the red display pixel PXR and the green display pixel PXG. Can be suppressed, and a liquid crystal display device with good display quality can be provided.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope 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 (second substrate 1 substrate), 120 ... opposing substrate (second substrate), 130 ... backlight unit.

Claims (5)

A plurality of scanning lines extending in a first direction, a plurality of video signal lines extending in a second direction intersecting the first direction, and a plurality electrically connected to the plurality of scanning lines and the plurality of video signal lines A switching element, a first insulating film disposed on the plurality of switching elements, a plurality of pixel electrodes electrically connected to the plurality of switching elements, a plurality of common electrodes, and the plurality of signals a display device comprising a plurality of metal wiring extending along a line, to the image display area,
Wherein a plurality of pixel electrodes, wherein a plurality of common electrodes, wherein the plurality of metal wiring is disposed on the first insulating film,
The plurality of pixel electrodes are a first pixel electrode, a second pixel electrode adjacent in the first direction of the first pixel electrode, and a third pixel electrode adjacent in the first direction of the second pixel electrode. Have
The plurality of common electrodes may be a first common electrode facing the first pixel electrode, a second common electrode facing the second pixel and the third pixel, a first common electrode, and a second direction. An adjacent third common electrode, and a fourth common electrode adjacent to the second common electrode in the second direction and adjacent to the third common electrode in the first direction, and the first common electrode and the fourth common electrode The second common electrodes are spaced apart from each other in the first direction, and the third common electrode and the fourth common electrode are spaced apart from each other in the first direction,
Wherein the plurality of metal wiring has a first metal wiring extending in the second direction so as to cross the plurality of scanning lines, and the second metal interconnect, wherein the plurality of metal wiring is the first The first pixel electrode and the second pixel electrode are not formed between the first pixel electrode and the second pixel electrode along the second direction, and the first pixel electrode and the second pixel electrode are formed of the first metal wire and the second metal wire. located between the second metal wiring is formed along the second direction in between the second pixel electrode third pixel electrode,
Wherein said spaced in a second direction the second common electrode 4 common electrode is connected via the second metal wiring,
The first pixel electrode is a pixel electrode of a first color display pixel,
The second pixel electrode is a pixel electrode of a second color display pixel,
The first color is either red or green,
The second color is either green or red different from the first color,
The width of the plurality of metal wires is wider than the distance between the first common electrode and the second common electrode in the first direction,
The thickness of the plurality of metal wires is thicker than the thickness of the scanning line and the video signal line . The plurality of pixel electrodes further include a fourth pixel electrode adjacent to the first direction of the third pixel electrode, and the plurality of metal wires are disposed between the third pixel electrode and the fourth pixel electrode. Having a third metal wire formed along the second direction,
The fourth pixel electrode is a pixel electrode of the pixel having the first color,
The fourth pixel electrode is opposed to the second common electrode, and the second common electrode and the fourth common electrode separated in the second direction are connected to each other through the third metal wire ; The display device according to claim 1, characterized in that: The plurality of scan lines are first scan lines electrically connected to the first pixel electrode, the second pixel electrode, the third pixel electrode, and the fourth pixel electrode, and the first pixel electrode and the first scan line. A first ground electrode connected via a contact hole, a second ground electrode connected to the second pixel electrode via a second contact hole, and a third pixel electrode connected via a third contact hole A third ground electrode, and a fourth ground electrode connected to the fourth pixel electrode via a fourth contact hole,
The plurality of metal wires are not formed along the second direction between the first ground electrode and the second ground electrode, and the second metal wire is formed of the second ground electrode and the third metal wire . are formed along the second direction between the ground electrode, the third metal wiring is formed along the second direction between said fourth ground electrode and the third ground electrode The display device according to claim 2, characterized in that: Wherein the plurality of metal lines, the first and a fourth metal wiring extending along the direction, the fourth metal wiring is the third metal coordination and the second metal wiring and the first metal wiring Integrally connected to the wire,
Wherein said spaced in a first direction the first common electrode third common electrode, the fourth is connected via a metal wiring, the display apparatus according to claim 3. The display device further comprises a sensing circuit, the sensing circuit detects an object contact point coordinates from the output waveform of the signal output from said plurality of metal wiring, that the display device according to claim 3, wherein.

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