JP2009122644A - Liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display panel having superior display quality. <P>SOLUTION: The liquid crystal display panel includes: an array substrate 10 including a scanning line, a signal line, a switching element electrically, and a pixel electrode 17; an opposite substrate 20 including a common electrode 22 with a through-hole 22a; a columnar spacer 50 formed on either one of the array substrate and the opposite substrate and positioned away from the pixel electrode, the columnar spacer overlapping the through-hole and holding the gap between the array substrate and the opposite substrate; and a liquid crystal layer 80 held between the array substrate and the opposite substrate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel provided with columnar spacers.

  In recent years, lightweight, small, and high-definition liquid crystal display devices have been developed in the information equipment field centered on computers and the video equipment field centered on televisions. In general, a liquid crystal display device includes a liquid crystal display panel having an array substrate, a counter substrate, and a liquid crystal layer sandwiched between the two substrates. The array substrate and the counter substrate have a display area. Between the array substrate and the counter substrate, for example, plastic beads having a uniform particle diameter are arranged as a spacer, and a gap between the two substrates is kept constant. The array substrate and the counter substrate are joined by a rectangular frame-shaped sealing material disposed outside the display area of both substrates.

  In the color display type active matrix drive liquid crystal display device, in the display area of the array substrate, a plurality of signal lines and a plurality of scanning lines are arranged in a matrix on the substrate, and in the vicinity of each intersection of the signal lines and the scanning lines. For example, a thin film transistor (hereinafter referred to as TFT) having a semiconductor layer of amorphous silicon (a-Si) or polysilicon (p-Si) is disposed. Each TFT is connected to a pixel electrode formed on the substrate. An alignment film is formed on the substrate including the pixel electrode.

  In the counter substrate, a color filter, a common electrode, and an alignment film are sequentially formed on the substrate. The color filter is composed of colored layers of red, green and blue. The liquid crystal layer is sandwiched between the array substrate and the counter substrate to constitute a liquid crystal display device.

Also, a technique is disclosed in which columnar spacers are formed on at least one of the array substrate and the counter substrate by patterning using a photolithography method or the like in order to make the gap between the array substrate and the counter substrate uniform. (For example, refer to Patent Document 1).
JP 2006-18238 A

The columnar spacer overlaps the common electrode. Even in the array substrate, the columnar spacer may overlap the pixel electrode. In general, the pixel electrode and the common electrode are made of ITO (indium tin oxide) which is an inorganic material. In this case, the pixel electrode and the common electrode are brittle like glass. For this reason, if the columnar spacer overlaps the pixel electrode and the common electrode, when an impact is applied, the liquid crystal display panel cannot sufficiently absorb the impact and the common electrode and the like may be damaged. Further, at low temperatures, the volume change cannot be sufficiently followed, bubbles tend to be generated, and the display quality is lowered.
The present invention has been made in view of the above points, and an object thereof is to provide a liquid crystal display panel excellent in display quality.

In order to solve the above-described problems, a liquid crystal display panel according to an aspect of the present invention includes:
A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A columnar spacer formed on one of the array substrate and the counter substrate, positioned away from the pixel electrode, superimposed on the through hole, and holding a gap between the array substrate and the counter substrate;
A liquid crystal layer sandwiched between the array substrate and the counter substrate.

In addition, a liquid crystal display panel according to another aspect of the present invention includes:
A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A light shielding portion provided on one of the array substrate and the counter substrate;
A color filter provided on any one of the array substrate and the counter substrate, having a colored layer of a plurality of colors, and having a cutout portion overlapping the light shielding portion;
A columnar shape that is formed on one of the array substrate and the counter substrate, is positioned away from the pixel electrode, overlaps the through hole, the light shielding portion, and the notch portion, and holds a gap between the array substrate and the counter substrate A spacer;
A liquid crystal layer sandwiched between the array substrate and the counter substrate.

In addition, a liquid crystal display panel according to another aspect of the present invention includes:
A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A light shielding portion provided on one of the array substrate and the counter substrate;
A color filter provided on any one of the array substrate and the counter substrate, having a colored layer of a plurality of colors, and having a cutout portion overlapping the light shielding portion;
A columnar shape that is formed on one of the array substrate and the counter substrate, is positioned away from the pixel electrode, overlaps the through hole, the light shielding portion, and the notch portion, and holds a gap between the array substrate and the counter substrate A spacer;
A liquid crystal layer sandwiched between the array substrate and the counter substrate and including a liquid crystal material having a negative dielectric anisotropy,
The through hole of the common electrode controls the direction in which the liquid crystal molecules in the liquid crystal layer are inclined.

  According to the present invention, a liquid crystal display panel excellent in display quality can be provided.

Hereinafter, a liquid crystal display device according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the liquid crystal display device includes a liquid crystal display panel 1, a backlight unit 2, and a bezel 3. The liquid crystal display panel 1 includes an array substrate 10, a counter substrate 20, a color filter 40, a columnar spacer 50, a sealing material 70, a liquid crystal layer 80, a first polarizing plate 91 and a second polarizing plate 92. The liquid crystal display panel 1 has a rectangular display region R1 that overlaps the array substrate 10 and the counter substrate 30.

  As shown in FIGS. 1 to 5, the active matrix array substrate 10 includes a glass substrate 11 as a transparent insulating substrate. A gate insulating film 12 is formed on the glass substrate 11. In the display region R1, a plurality of scanning lines 13 and a plurality of signal lines 14 are provided in a grid pattern on the gate insulating film 12 with an insulating film (not shown) interposed therebetween.

  The pixels P are provided in a matrix along the first direction d1 and the second direction d2 along the plane of the liquid crystal display panel 1. Two adjacent scanning lines 13 and two adjacent signal lines 14 define a pixel region R2. The pixel P is formed in the pixel region R2.

  An interlayer insulating film 15 is formed on the gate insulating film 12, the scanning line 13, and the signal line 14. The interlayer insulating film 15 is formed of an organic resin as an organic material. The thickness of the interlayer insulating film 15 is about 1 to 4 μm. For example, a TFT 16 is provided as a switching element near each intersection of the scanning line 13 and the signal line 14. The TFT 16 is electrically connected to the scanning line 13 and the signal line 14.

  The TFT 16 includes a gate electrode 16a extending part of the scanning line 13, a channel layer 16b facing the gate electrode through the gate insulating film 12, a source electrode 16c connected to one region of the channel layer, and the other It has a drain electrode 16d connected to the region. In this embodiment, the channel layer is formed of polysilicon (p-Si). The source electrode 16c is connected to the signal line 14, and the drain electrode 16d is connected to a pixel electrode 17 described later.

A plurality of pixel electrodes 17 are formed in a matrix on the interlayer insulating film 15. The pixel electrode 17 is formed of a transparent conductive film such as ITO (Indium Tin Oxide). ITO is an inorganic material. The pixel electrode 17 is connected to the drain electrode 16 d through a contact hole formed in the interlayer insulating film 15.
The pixel P is formed by the TFT 16, the pixel electrode 17, and the like.

Although not all shown, a plurality of columnar spacers 50 are formed on the interlayer insulating film 15 with a predetermined density. The columnar spacer 50 is superimposed on the interlayer insulating film 15 and is located away from the pixel electrode 17. In this embodiment, the columnar spacer 50 is located completely away from the pixel electrode 17 and is also located completely away from the pixel region R2. The columnar spacer 50 is made of a transparent resin. The columnar spacer 50 is a square column. The cross section of the columnar spacer 50 in the direction along the plane of the liquid crystal display panel 1 is a quadrangle.
An alignment film 18 is formed on the glass substrate 11 so as to overlap the pixel electrode 17.

  As shown in FIGS. 1 to 4 and 6, the counter substrate 20 has a glass substrate 21 as a transparent insulating substrate. In the display region R <b> 1, a light shielding layer 31 that overlaps the scanning lines 13 and the signal lines 14 is formed on the glass substrate 21. The light shielding layer 31 has a plurality of openings 32 in a matrix shape.

  Outside the display region R1, a rectangular frame-shaped peripheral light shielding layer 33 is formed on the glass substrate 21 as a light shielding layer. The peripheral light shielding layer 33 is formed over the entire outer edge of the display region R1 and contributes to shielding light leaking from between the outside of the display region R1 and the inside of the bezel 3.

  On the glass substrate 21, the light shielding layer 31, and the peripheral light shielding layer 33, a plurality of red colored layers 40R, a plurality of green colored layers 40G, and a plurality of blue colored layers 40B are formed as insulating layers formed of an organic material. It is arranged. These colored layers 40R, 40G, and 40B are adjacent to each other and are alternately arranged to form the color filter 40. The thickness of the color filter 40 is about 1 to 4 μm. The peripheral portions of these colored layers 40R, 40G, and 40B overlap the light shielding layer 31.

On the colored layers 40R, 40G, and 40B, the common electrode 22 is formed of a transparent conductive film such as ITO. The common electrode 22 includes a plurality of through holes 22a. In this embodiment, the through hole 22 a overlaps the columnar spacer 50. The through hole 22a is formed in a rectangular shape. The through hole 22 a surrounds the columnar spacer 50. For this reason, the common electrode 22 is completely detached from the columnar spacer 50.
An alignment film 23 is formed on the glass substrate 21 on which the common electrode 22 is formed.

  The array substrate 10 and the counter substrate 20 are arranged to face each other with a predetermined gap by a columnar spacer 50. The array substrate 10 and the counter substrate 20 are joined to each other by a rectangular frame-shaped sealing material 70 disposed at the peripheral edge of both substrates.

  The liquid crystal layer 80 is sandwiched between the array substrate 10 and the counter substrate 20. A liquid crystal injection port 71 formed in a part of the sealing material 70 is sealed with a sealing material 72. A first polarizing plate 91 is disposed on the outer surface of the array substrate 10. A second polarizing plate 92 is disposed on the outer surface of the counter substrate 20. In this embodiment, the outer surface of the second polarizing plate 92 is the display surface S1.

  As shown in FIGS. 1 and 2, the backlight unit 2 is disposed on the outer surface side of the array substrate 10. The backlight unit 2 includes a light guide 2a disposed to face the first polarizing plate 91, and a light source 2b and a reflector 2c disposed to face one side edge of the light guide. The light guide 2 a has a light emission surface S <b> 2 facing the first polarizing plate 91.

  The bezel 3 is formed in a frame shape, and is disposed on the display surface S1 side and outside the display region R1. The bezel 3 is positioned such that the inner periphery passes through a region facing the peripheral light shielding layer 33.

Next, a more detailed configuration of the liquid crystal display device will be described together with its manufacturing method.
As shown in FIGS. 1 to 6, first, the gate insulating film 12, the scanning line 13, the signal line 14, and the interlayer insulating film are formed on the prepared glass substrate 11 by a normal manufacturing process such as repeated film formation and patterning. 15, TFT 16 and pixel electrode 17 are formed. When the interlayer insulating film 15 is formed, it is formed using an organic resin. When the pixel electrode 17 is formed, it is formed using ITO.

  Next, using a spinner, for example, a photosensitive transparent resin is applied on the entire surface of the glass substrate 11. Subsequently, the transparent resin is dried. Next, patterning is exposed to the transparent resin using a predetermined photomask. The photomask used here has a pattern for forming the columnar spacer 50.

Next, after developing the exposed transparent resin, it is baked and cured. Thereby, a plurality of columnar spacers 50 are formed. The columnar spacer 50 is formed at a position away from the pixel electrode 17 (pixel region R2).
Thereafter, an alignment film 18 is formed on the glass substrate 11 including the display region R1 by applying an alignment film material. In this embodiment, the alignment film 18 is a vertical alignment film.

  On the other hand, in the manufacturing method of the counter substrate 20, first, the glass substrate 21 is prepared. Next, the light shielding layer 31 and the peripheral light shielding layer 33 are formed on the glass substrate 21. Subsequently, a colored layer 40R is formed on the glass substrate 21, the light shielding layer 31, and the peripheral light shielding layer 33 by using, for example, a photoetching method. Thereafter, similarly to the colored layer 40R, the colored layer 40G and the colored layer 40B are formed by using, for example, a photoetching method.

Subsequently, the common electrode 22 is formed over the colored layers 40R, 40G, and 40B. When the common electrode 22 is formed, ITO is applied on the glass substrate 21 to form an ITO film, and then the ITO film in a region facing the columnar spacer 50 is removed using a photolithography method. Thereby, the common electrode 22 including the plurality of through holes 22a is formed.
Next, the alignment film 23 is formed by applying an alignment film material on the glass substrate 21 including the display region R1. In this embodiment, the alignment film 23 is a vertical alignment film.

  Next, for example, an ultraviolet curable resin is applied along the periphery of the counter substrate 20. Subsequently, the array substrate 10 and the counter substrate 20 are arranged to be opposed to each other with a plurality of columnar spacers 50 so that the alignment film 18 and the alignment film 23 face each other. Bonding with UV curable resin. Thereafter, the ultraviolet curable resin is irradiated with ultraviolet rays to be cured. Thereby, the sealing material 70 for fixing the array substrate 10 and the counter substrate 20 is formed.

  Thereafter, the bonded array substrate 10 and counter substrate 20 are carried into a vacuum chamber (not shown). Then, in a vacuum, liquid crystal is injected from the liquid crystal injection port 71 into a region surrounded by the array substrate 10, the counter substrate 20, and the sealing material 70. Subsequently, the liquid crystal injection port 71 is sealed with a sealing material 72 made of, for example, an ultraviolet curable resin. Thereafter, the liquid crystal panel into which the liquid crystal has been injected is carried out of the vacuum chamber.

  Next, the first polarizing plate 91 is disposed on the outer surface of the array substrate 10, and the second polarizing plate 92 is disposed on the outer surface of the counter substrate 20. Thus, the VA mode liquid crystal display panel 1 is formed. Then, the backlight unit 2 and the bezel 3 are attached to the liquid crystal display panel 1 to be assembled into a module. Thereby, a liquid crystal display device is completed.

  According to the liquid crystal display device configured as described above, the columnar spacer 50 is located away from the pixel electrode 17 and the common electrode 22. For this reason, on the counter substrate 20 side, a plurality of through holes 22a are provided in the common electrode 22, and the columnar spacers 50 are overlapped with the through holes 22a. Thereby, the columnar spacer 50 can be formed at a position deviated from the pixel electrode 17 and the common electrode 22 which lack elasticity. Further, since the through hole 22a is formed at a position away from the pixel electrode 17 and the common electrode 22, the display is not affected.

  On the array substrate 10 side, the columnar spacer 50 is formed on the interlayer insulating film 15 made of an organic resin. On the counter substrate 20 side, the columnar spacer 50 overlaps the colored layers 40R, 40G, and 40B (color filter 40) formed of an organic material. In the direction perpendicular to the plane of the liquid crystal display panel 1, members between the interlayer insulating film 15 and the color filter 40 are the interlayer insulating film 15, the columnar spacer 50, the alignment film 18, the alignment film 23, and the color filter 40 in this order. .

  Similar to the columnar spacer 50, the interlayer insulating film 15 and the color filter 40 are rich in elasticity. For this reason, it is possible to absorb the impact applied from the outside at a low temperature or the like by the entire liquid crystal display panel 1 including the columnar spacers 50. Since it is possible to sufficiently follow the volume change, it is possible to suppress the generation of bubbles (voids) between the array substrate 10 and the counter substrate 20. As a result, a good image can be displayed even when an impact is applied from the outside.

Since the color filter 40 is provided on the counter substrate 20 side, the externally applied impact can be absorbed on the array substrate 10 side and the counter substrate 20 side without increasing the conventional manufacturing process and members.
As described above, a liquid crystal display device excellent in display quality can be obtained.

  Next, a liquid crystal display device according to another embodiment of the present invention will be described in detail. In this embodiment, other configurations are the same as those of the above-described embodiment, and the same reference numerals are given to the same portions, and detailed description thereof is omitted.

  Although not shown, the liquid crystal display device includes the liquid crystal display panel 1, the backlight unit 2, and the bezel 3 described above. As shown in FIG. 7, the liquid crystal display panel 1 includes an array substrate 10, a counter substrate 20, a color filter 40, columnar spacers 50, and a liquid crystal layer 80. Although not shown, the liquid crystal display panel 1 also includes the sealing material 70, the first polarizing plate 91, and the second polarizing plate 92 described above. The pixel pitch of the liquid crystal display panel 1 is 30.0 μm.

  As shown in FIGS. 7 and 8, in the counter substrate 20, a light shielding layer 31 and a peripheral light shielding layer 33 (not shown) are formed on the glass substrate 21. The light shielding layer 31 is extended and formed in a stripe shape or a lattice shape. In this embodiment, the light shielding layer 31 is formed in a lattice shape.

    The light shielding layer 31 has an overlapping portion 31a and a non-overlapping portion 31b. The overlapping portion 31 a overlaps the columnar spacer 50. The non-overlapping portion 31 b is separated from the columnar spacer 50. The superimposing part 31a and the non-superimposing part 31b are arranged in the second direction d2. The width w1 of the overlapping portion 31a is larger than the width w2 of the non-overlapping portion 31b. The peripheral portions of the colored layers 40R, 40G, and 40B overlap the light shielding layer 31. In the color filter 40, a notch 40a is formed at a portion overlapping the overlapping portion 31a. The notch 40a has a rectangular shape, and the length in the first direction d1 is 6 μm, and the length in the second direction d2 is 12 μm. In the overlapping portion 31 a of the light shielding layer 31, the cutout portion 40 a is a portion that is not covered with the color filter 40. That is, the overlapping portion 31a includes a portion where the color filter 40 rides on the light shielding layer 31 and overlaps, and a notch portion 40a where the color filter 40 is not present and the light shielding layer 31 is exposed. On the other hand, the overlapping portion 31b of the light shielding layer 31 is entirely covered with a color filter layer.

  On the light shielding layer 31 and the colored layers 40R, 40G, and 40B, an undercoat film 25 is formed of a transparent conductive material. The undercoat film 25 is for flattening the counter substrate 20 and also for protecting the liquid crystal layer 80.

  The common electrode 22 is formed on the undercoat film 25. The common electrode 22 includes a plurality of through holes 22a. In this embodiment, the through hole 22 a overlaps the columnar spacer 50. The through-hole 22a is formed in a stripe shape and extends in the first direction d1. The width of the through hole 22a in the second direction d2 is 12 μm. The common electrode 22 is completely separated from the columnar spacer 50. The alignment film 23 is formed on the glass substrate 21 on which the common electrode 22 is formed.

  The columnar spacer 50 is formed on the array substrate 10. The columnar spacer 50 is located away from the pixel electrode 17. The columnar spacer 50 is provided at a position overlapping the through hole 22a, the overlapping portion 31a, and the cutout portion 40a. Further, the cutout portion 40a of the overlapping portion 31a serving as a pedestal is sufficiently flattened by the undercoat film 25 because the color filter 40 is not on the light shielding layer 31 and the light shielding layer 31 is exposed. That is, in the portion of the cutout portion 40a of the light shielding layer 31, the distance between the array substrate 10 and the counter substrate 20 is uniform, and the columnar spacer 50 is provided at a location where the distance between the array substrate 10 and the counter substrate 20 is uniform. It has been.

  The liquid crystal layer 80 includes a liquid crystal material having a negative dielectric anisotropy.

  According to the liquid crystal display device configured as described above, the columnar spacer 50 is located away from the pixel electrode 17 and the common electrode 22. Therefore, on the counter substrate 20 side, the common electrode 22 is provided with a plurality of through holes 22a, and the columnar spacers 50 are provided at positions overlapping the through holes 22a. Thereby, the columnar spacer 50 can be formed at a position deviated from the pixel electrode 17 and the common electrode 22 which lack elasticity. Further, since the through hole 22a is formed at a position away from the pixel electrode 17 and the common electrode 22, the display is not affected. In addition, since the pixel electrode 17 and the common electrode 22 can be prevented from being broken, defects that become bright spots caused by the pieces of these electrodes can be prevented.

  The columnar spacer 50 is overlapped with the overlapping portion 31 a and the notch portion 40 a and is positioned away from the color filter 40. Since the counter substrate 20 overlapped with the overlapping portion 31 a has a uniform height, the tip of the columnar spacer 50 can be brought into good contact with the counter substrate 20. For this reason, the elasticity of the columnar spacer 50 with respect to the load can be maximized.

  Thereby, the shape of the columnar spacer 50 flexibly follows an external impact. In addition, the gap between the array substrate 10 and the counter substrate 20 can be kept constant, and display defects due to local gap defects can be prevented. Further, it is possible to suppress a decrease in transmittance, which is an optical characteristic, and yellowing and display unevenness during white display.

  By providing the columnar spacers 50 at locations where the unevenness on the counter substrate 20 side is small, the variation in cell gap from lot to lot can be reduced. For this reason, when the liquid crystal dropping injection method is used, the width of the dropping margin can be widened. From the above, a liquid crystal display device with a high product yield can be obtained.

  In addition, when the color filter 40 is formed without forming the notch 40a, the peripheral portions of the colored layers may overlap each other, and the degree of unevenness of the counter substrate 20 may be greatly different. In such a case, the contact of the columnar spacer 50 with the counter substrate 20 varies, and columnar spacers that are always in contact with the counter substrate and columnar spacers that are not in contact with the counter substrate are generated. Further, in this case, even if the undercoat film 25 is formed, the undercoat film 25 cannot be sufficiently flattened, and the degree of unevenness of the counter substrate 20 is greatly different.

  Further, by forming the through-hole 22a having a width of 12 μm in the common electrode 22, it is possible to maintain the alignment state of the liquid crystal molecules and display with good viewing angle characteristics. For this reason, the through hole 22 a of the common electrode 22 controls the direction in which the liquid crystal molecules of the liquid crystal layer 80 are inclined.

The shape of the through hole 22a is not limited to the stripe shape, and can be variously modified. For example, as shown in FIG. The through hole 22a may be rectangular. Even in this case, the through hole 22a of the common electrode 22 controls the direction in which the liquid crystal molecules of the liquid crystal layer 80 are inclined. Moreover, as shown in FIG. 10, the through-hole 22a may be hexagonal. Even in this case, the through hole 22a of the common electrode 22 controls the direction in which the liquid crystal molecules of the liquid crystal layer 80 are inclined. In particular, the through hole 22a in this case is suitable for an MVA (Multi-domain Vertically Aligned) mode liquid crystal display device.
As described above, a liquid crystal display device excellent in display quality can be obtained.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  For example, the shape of the columnar spacer 50 and the through hole 22a is not limited to the above-described embodiment, and can be variously modified. The columnar spacer 50 may be formed on either the array substrate 10 or the counter substrate 20. The columnar spacer 50 does not have to be completely separated from the pixel electrode 17 and may be partially overlapped with the pixel electrode 17. The columnar spacer 50 does not need to completely overlap with the through hole 22 a, and may be partially overlapped with the common electrode 22.

  Although not shown, when the color filter 40 is provided on the array substrate 10 side, the counter substrate 20 is positioned on the opposite side of the array substrate 10 with respect to the common electrode 22 and is laminated on the common electrode 22 and formed of an organic material. An insulating layer may be provided. A columnar spacer may be overlapped on this insulating layer.

1 is a perspective view showing a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a schematic sectional view showing the liquid crystal display device shown in FIG. 1. The top view which shows the wiring structure of the array board | substrate shown in FIG.1 and FIG.2. Sectional drawing which shows the liquid crystal display panel along line AA of FIG. FIG. 5 is an enlarged plan view of the array substrate shown in FIGS. 1 to 4, and particularly shows a pixel electrode, a pixel region, and a columnar spacer. FIG. 5 is an enlarged plan view of the counter substrate shown in FIGS. 1, 2, and 4, and particularly shows a common electrode, a through hole, a pixel region, and a columnar spacer. Sectional drawing which shows schematically the liquid crystal display panel of the liquid crystal display device which concerns on other embodiment of this invention. FIG. 8 is an enlarged plan view of the counter substrate shown in FIG. 7, in particular, the common electrode, the through hole, the coloring layer, and the light shielding layer 31 as viewed from the common electrode side. FIG. 9 is an enlarged plan view of a counter substrate of a liquid crystal display device according to another embodiment of the present invention, and particularly shows a modified example of the through hole shown in FIG. 8. FIG. 10 is an enlarged plan view of a counter substrate of a liquid crystal display device according to another embodiment of the present invention, and particularly shows another modification of the through hole shown in FIG. 8.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel, 2 ... Backlight unit, 10 ... Array substrate, 11 ... Glass substrate, 12 ... Gate insulating film, 13 ... Scan line, 14 ... Signal line, 15 ... Interlayer insulating film, 16 ... TFT, 17 ... Pixel electrode, 18 ... Alignment film, 20 ... Counter substrate, 21 ... Glass substrate, 22 ... Common electrode, 22a ... Through-hole, 23 ... Alignment film, 30 ... Counter substrate, 31 ... Light shielding layer, 31a ... Overlapping part, 40 ... Color filter, 40a ... notch, 40R, 40G, 40B ... colored layer, 50 ... columnar spacer, 80 ... liquid crystal layer, R1 ... display region, R2 ... pixel region, w1, w2 ... width.

Claims (8)

A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A columnar spacer formed on one of the array substrate and the counter substrate, positioned away from the pixel electrode, superimposed on the through hole, and holding a gap between the array substrate and the counter substrate;
And a liquid crystal layer sandwiched between the array substrate and the counter substrate. The array substrate is formed on the scanning line, the signal line, and the switching element, is located under the pixel electrode, and has an insulating film formed of an organic material,
The liquid crystal display panel according to claim 1, wherein the columnar spacer overlaps the insulating film. The counter substrate is located on the opposite side of the array substrate with respect to the common electrode, and is laminated on the common electrode, and has an insulating layer formed of an organic material,
The liquid crystal display panel according to claim 1, wherein the columnar spacer overlaps the insulating layer.   The liquid crystal display panel according to claim 3, wherein the insulating layer is a color filter. A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A light shielding portion provided on one of the array substrate and the counter substrate;
A color filter provided on any one of the array substrate and the counter substrate, having a colored layer of a plurality of colors, and having a cutout portion overlapping the light shielding portion;
A columnar shape that is formed on one of the array substrate and the counter substrate, is positioned away from the pixel electrode, overlaps the through hole, the light shielding portion, and the notch portion, and holds a gap between the array substrate and the counter substrate A spacer;
And a liquid crystal layer sandwiched between the array substrate and the counter substrate. A scanning line; a signal line provided across the scanning line; a switching element electrically connected to the scanning line and the signal line; and the scanning line, the signal line, and the switching element. And an array substrate having a pixel electrode electrically connected to the switching element,
A counter substrate having a common electrode including a through-hole and disposed to face the array substrate with a gap;
A light shielding portion provided on one of the array substrate and the counter substrate;
A color filter provided on any one of the array substrate and the counter substrate, having a colored layer of a plurality of colors, and having a cutout portion overlapping the light shielding portion;
A columnar shape that is formed on one of the array substrate and the counter substrate, is positioned away from the pixel electrode, overlaps the through hole, the light shielding portion, and the notch portion, and holds a gap between the array substrate and the counter substrate A spacer;
A liquid crystal layer sandwiched between the array substrate and the counter substrate and including a liquid crystal material having a negative dielectric anisotropy,
The through hole of the common electrode is a liquid crystal display panel that controls a tilt direction of liquid crystal molecules of the liquid crystal layer. The light shielding portion and the color filter are provided on the counter substrate, and are located on the opposite side of the array substrate with respect to the common electrode,
The liquid crystal display panel according to claim 5, wherein the columnar spacer is formed on the array substrate. The light-shielding portion is formed in a stripe shape or a lattice shape so as to extend, and has an overlapping portion that overlaps the columnar spacer, and a non-overlapping portion that deviates from the columnar spacer,
The liquid crystal display panel according to claim 5, wherein a width of the overlapping portion is larger than a width of the non-overlapping portion.

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