JP2010139918A - Liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display panel of FFS (fringe field switching) mode which is adjusted in an aperture rate, for avoiding the end parts of slits that tend to be influenced by the variation in luminance so as to have chrominance which is low in error to be a designed value. <P>SOLUTION: In the liquid crystal display panel 10A of FFS mode, subpixels 12RA, 12GA and 12BA are partitioned by signal lines 17 and scanning lines 20, and the color of one pixel 11A is set by the mixed color derived from the colors of the subpixels 12RA, 12GA and 12BA; the subpixel 12BA, which is set smaller in the aperture rate than the subpixels 12RA and 12GA of other colors, is provided so as to adjust the chrominance; and in the subpixel 12BA having the smaller aperture rate, a light-shielding layer 30, which is formed along the side of the subpixel 12BA, on the side at which the number of end parts 34 of slit-like apertures 27, becomes zero or a minimum, and is extended longer in the row direction than in the case of the subpixels 12RA and 12GA of other colors. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an FFS mode liquid crystal display panel, and more particularly, to an FFS mode liquid crystal display panel having sub-pixels having aperture ratios different from those of sub-pixels of other colors.

Liquid crystal display panels are characterized by their light weight, thinness, and low power consumption compared to CRTs (cathode ray tubes), and are therefore used in many electronic devices for display purposes. The liquid crystal display panel displays an image by changing the direction of liquid crystal molecules aligned in a predetermined direction by an electric field and changing the amount of light transmitted through the liquid crystal layer. This includes a reflective type in which external light is incident on the liquid crystal layer, reflected by the reflector, then transmitted again through the liquid crystal layer, and a transmissive type in which incident light from the backlight device is transmitted through the liquid crystal layer. And a transflective type having both properties.

As a method for applying an electric field to a liquid crystal layer of a liquid crystal display panel, there are a vertical electric field method and a horizontal electric field method. A vertical electric field type liquid crystal display panel applies a substantially vertical electric field to liquid crystal molecules by a pair of electrodes arranged with a liquid crystal layer interposed therebetween. As this vertical electric field type liquid crystal display panel, TN (Twisted Nematic) mode, VA (Vertical Alignment)
A mode, an MVA (Multi-domain Vertical Alignment) mode, and the like are known.
A horizontal electric field type liquid crystal display panel is provided with a pair of electrodes insulated from each other on one inner surface side of a pair of substrates arranged with a liquid crystal layer sandwiched therebetween. In contrast, it is applied. This horizontal electric field type liquid crystal display panel includes an IPS (In-Plane Switching) mode in which a pair of electrodes do not overlap in a plan view, and an overlapping FFS (Fringe Fie).
ld Switching) mode is known. The liquid crystal display panel of the horizontal electric field type has an effect that a wide viewing angle can be obtained.

In addition, liquid crystal display devices include a monochrome display type and a color display type. The color of one pixel (one pixel) of the color display type liquid crystal display device is, for example, R (red), G (green)
-It is determined by the color mixture of the light transmitted through the sub-pixels individually provided with the color filters for the three primary colors of B (blue) light. For example, an 8-bit voltage corresponding to 0 to 255 gradations is R · G · B
When applied to each of the sub-pixels, the luminance of each sub-pixel becomes 256 types, and a large number of colors can be displayed by one pixel depending on the combination of the luminance of each of the sub-pixels. In a liquid crystal display panel formed of such R, G, and B sub-pixels, white display is obtained by lighting all the R, G, and B sub-pixels.

However, due to the formation error of each layer in the liquid crystal display panel and process fluctuations, R · G
-The chromaticity and luminance balance of B are lost, and even when a voltage of the same gradation is applied to each of the R, G, and B sub-pixels, a phenomenon of yellowing does not occur. As a method of solving such a problem with a simple structure, as shown in Patent Document 1 below, there is a method of adjusting the aperture ratio of at least one of R, G, and B subpixels with a light shielding layer. It is considered.
JP-A-2005-99455 JP 2005-70747 A

However, the liquid crystal display panel described in Patent Document 1 is of a vertical electric field type, and does not include an upper electrode having a slit-like opening unlike an FFS mode liquid crystal display panel. In the FFS mode liquid crystal display panel, as disclosed in Patent Document 2,
Since the end of the slit-like opening has a reverse twist domain in which the rotation direction of the liquid crystal molecules is reversed, the end of the slit-like opening is shielded from light by a light shielding member. However, the luminance of the end portion of the slit-shaped opening may vary greatly due to a change in the ratio of light shielding due to variations in liquid crystal behavior during driving, misalignment during assembly, and the like. Furthermore, when alignment division is performed in order to provide viewing angle uniformity for driving the liquid crystal, there is a problem that the viewing angle uniformity is lost depending on the light shielding method.

The present invention has been made to solve such problems of the prior art, and by adjusting the aperture ratio while avoiding a portion that is easily affected by luminance change, an error from the luminance of the design value is achieved. An object of the present invention is to provide a liquid crystal display panel in an FFS mode with a small amount.

In order to achieve the above object, a liquid crystal display panel of the present invention includes a first substrate and a second substrate that are disposed to face each other with a liquid crystal layer interposed therebetween, and the first substrate is in a matrix insulated from each other. A plurality of signal lines and scanning lines formed in a shape, an upper electrode having a plurality of slit-like openings formed for each sub-pixel defined by the scanning lines and signal lines, and the upper electrode and an insulating layer interposed therebetween. A lower electrode formed on the substrate side, and the second substrate includes a light shielding layer formed so as to overlap the signal line and the scanning line in plan view, and the scanning line and the signal line. A liquid crystal display panel including a plurality of sub-pixels each having a color filter layer of a different color, wherein the one pixel is formed. Multiple sub-pixels Sub-pixels having aperture ratios smaller than those of other color sub-pixels are formed, and the sub-pixels having a smaller aperture ratio are the ends of the slit-like openings located on the sides of the sub-pixels. The aperture ratio is reduced by the light-shielding layer formed along the side on which the number of parts is zero or minimum.

The liquid crystal display panel of the present invention includes a plurality of signal lines and scanning lines formed in a matrix in a state of being insulated from each other, and a plurality of slits formed for each sub-pixel partitioned by the scanning lines and signal lines. An upper electrode having an opening, and a lower electrode formed on the substrate side through the upper electrode and an insulating layer are provided. Therefore, the liquid crystal display panel of the present invention operates in the FFS mode.

In the liquid crystal display panel of the present invention, for adjusting the chromaticity, a plurality of sub-pixels forming one pixel are formed with sub-pixels having an aperture ratio smaller than that of the sub-pixels of other colors. The sub-pixel having a small aperture ratio is formed by a light shielding layer formed along the side where the number of ends of the slit-like openings located on each side of the sub-pixel is zero or minimum. Has been made smaller. Therefore, according to the liquid crystal display panel of the present invention, the light is shielded by avoiding the end of the slit-like opening that is easily affected by the change in the liquid crystal behavior during driving or the positional change during assembly, etc. It is possible to obtain an FFS mode liquid crystal display panel with a small error from the brightness of.

In the liquid crystal display panel of the present invention, both the upper electrode and the lower electrode can be operated as a pixel electrode or a common electrode, and the plurality of slit-like openings formed in the upper electrode are linear in one direction. Even if they extend in a straight line or consist of two groups extending linearly in different directions, at least a part of them is in a “V” shape or a “V” shape. It may be bent. The extending direction of the slit-shaped opening in the liquid crystal display panel of the present invention may extend along the scanning line or may extend along the signal line.

In the liquid crystal display panel of the present invention, in each of the plurality of sub-pixels,
It is preferable that end portions of the plurality of slit-shaped openings are positioned on the long side of the sub pixel, and the aperture ratio is reduced by the light shielding layer formed along the short side of the sub pixel. .

One pixel of the liquid crystal display panel is formed of a plurality of sub-pixels. Usually, one pixel is square-shaped, and each sub-pixel has a vertically long rectangular shape so that it can be seen visually. Has been. In the FFS mode liquid crystal display panel, when the ends of the plurality of slit openings are positioned on the long side of the sub-pixel, the side on the side where the number of ends of the slit openings is zero or the minimum Is the side on the short side. In the liquid crystal display panel of the present invention, the sub-pixel having a small aperture ratio has an aperture ratio due to the light shielding layer formed along the short side on the side where the number of ends of the slit-shaped opening is zero or minimum. It has been made smaller. Therefore, according to the liquid crystal display panel of the present invention, the aperture ratio can be adjusted more finely than when the aperture ratio is adjusted by the light shielding layer formed along the long side. Thus, an FFS mode liquid crystal display panel with a small amount can be obtained.

In the liquid crystal display panel of the present invention, in each of the plurality of sub-pixels,
It is preferable that the plurality of slit-shaped openings have a horizontal “<” shape along the short side.

In the FFS mode liquid crystal display panel, when the extending direction of the slit-shaped opening is only one direction, the color difference due to the viewing angle becomes large. On the other hand, if there are two regions in which the extending directions of the slit-like openings of the sub-pixels are different from each other, the VT characteristics (
Regions having different (applied voltage transmittance characteristics) occur, and the difference in color depending on the viewing angle can be reduced. In addition, when the slit-like opening of each sub-pixel has a horizontal “<” shape along the short side, the extending direction of the slit-like opening is on both sides of the position corresponding to the vertical center line of the “<” character. Two different regions are formed. Therefore, according to the liquid crystal display panel of the present invention, it is possible to obtain an FFS mode liquid crystal display panel in which the difference in color depending on the viewing angle is reduced and the error of the design value is less.

In the liquid crystal display panel of the present invention, the aperture ratio is also determined by a light-shielding layer formed along a short side facing the short side on the side where the number of ends of the slit-shaped opening is zero or minimum. It is preferable to make it small.

Since a switching element is formed in each subpixel, the shape of the slit-like opening on the two short sides of each subpixel is usually different from each other. In the liquid crystal display panel of the present invention, since the aperture ratio is reduced by the light shielding layer formed along the two short sides, the aperture ratio can be finely controlled. Thus, an FFS mode liquid crystal display panel with a small amount can be obtained.

In the liquid crystal display panel of the present invention, in each of the plurality of sub-pixels,
Preferably, the plurality of slit-shaped openings have two groups extending in different directions from each other at an acute angle with respect to the short side.

In the liquid crystal display panel of the present invention, since the plurality of slit-shaped openings have two groups extending at different angles from each other at an acute angle with respect to the short side, the intermediate position between the two groups is the boundary. Two regions where the extending directions of the slit-like openings are different from each other are formed on both sides. for that reason,
According to the liquid crystal display panel of the present invention, it is possible to obtain an FFS mode liquid crystal display panel in which the difference in color depending on the viewing angle is reduced and the error with the brightness of the design value is further reduced. 2
The slit openings belonging to the respective groups located at the boundary between the two groups may be connected to each other.

Further, in the liquid crystal display panel of the present invention, even when the plurality of slit-shaped openings have two groups extending in different directions at an acute angle with respect to the short side, the aperture ratio is It is preferable that the number of end portions of the slit-shaped opening is also reduced by a light shielding layer formed along the short side facing the short side on the side where the number is zero or minimum.

Also in the present invention, since the aperture ratio is reduced by the light shielding layer formed along the two short sides, the aperture ratio can be controlled more finely, and the FFS mode with less error from the design value brightness. The liquid crystal display panel can be obtained.

In the liquid crystal display panel of the present invention, it is preferable that the ratio of the aperture ratios of the two groups is the same in each of the plurality of sub-pixels.

According to the liquid crystal display panel of the present invention, the ratio of the aperture ratios of the two areas is the same in all the sub-pixels of all colors, so that the ratio of the aperture ratios of the areas having different VT characteristics is the same. Therefore, even if there is a sub-pixel having an aperture ratio smaller than that of other sub-pixels for chromaticity adjustment, the color difference due to the viewing angle does not deteriorate. .

In the liquid crystal display panel of the present invention, in each of the plurality of sub-pixels,
It is preferable that end portions of the plurality of slit-shaped openings are located on the short side of the sub-pixel, and the aperture ratio is reduced by the light-shielding layer formed along the long side of the sub-pixel. .

When the end portions of the plurality of slit-shaped openings are formed so as to be positioned on the short side of the sub-pixel, the side on which the number of end portions of the slit-shaped openings is zero or the minimum is the long side. In the liquid crystal display panel of the present invention, the aperture ratio of the subpixel having a small aperture ratio is reduced by the light shielding layer formed along the long side on the side where the number of ends of the slit-shaped opening is zero or minimum. It has been made smaller. FF
In the S-mode liquid crystal display panel, the end of the slit-shaped opening cannot be displayed normally, so the presence of the end of the slit-shaped opening itself causes a decrease in the aperture ratio. According to the liquid crystal display panel of the present invention, compared to the case where the ends of the plurality of slit-like openings are formed so as to be positioned on the long side of the sub-pixel, the number of ends of the slit-like openings is reduced. F with improved aperture ratio
An FS mode liquid crystal display panel can be obtained.

In the liquid crystal display panel of the present invention, in each of the plurality of sub-pixels,
It is preferable that the plurality of slit-shaped openings have a vertical “<” shape along the long side.

When the slit-like opening of each sub-pixel has a vertical “<” shape along the long side, the extending direction of the slit-like opening differs on both sides of the position corresponding to the horizontal center line of the “<” shape. Two regions are formed. Therefore, according to the liquid crystal display panel of the present invention, it is possible to obtain an FFS mode liquid crystal display panel in which the difference in color depending on the viewing angle is reduced and the error of the design value is less.

In the liquid crystal display panel of the present invention, the aperture ratio is also determined by a light shielding layer formed along a long side facing a long side on the side where the number of ends of the slit-shaped opening is zero or minimum. It is preferable to make it small.

Since a switching element is formed in each sub-pixel, the shape of the slit-like opening on the two long sides of each sub-pixel is usually different from each other. In the liquid crystal display panel of the present invention, since the aperture ratio is reduced by the light shielding layer formed along the two long sides, the aperture ratio can be controlled more finely, and the error from the brightness of the design value can be further reduced. Thus, an FFS mode liquid crystal display panel with a small amount can be obtained.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the embodiment and the drawings.
The embodiments described below are not intended to limit the present invention to those described herein, and the present invention has been variously modified without departing from the technical idea shown in the claims. It can be applied equally. In each drawing used for the description in this specification, each layer and each member are displayed in different scales so that each layer and each member can be recognized on the drawing. However, it is not necessarily displayed in proportion to the actual dimensions.

FIG. 1 is a plan view of one pixel of the liquid crystal display panel of the first embodiment. FIG. 2 is II-II in FIG.
It is sectional drawing of a line. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a plan view of one pixel of the liquid crystal display panel of the second embodiment. FIG. 5 is a plan view of one pixel of the liquid crystal display panel of the third embodiment. FIG. 6 is a plan view of one pixel of the liquid crystal display panel of the fourth embodiment. FIG. 7 is a plan view of one pixel of the liquid crystal display panel of the fifth embodiment. FIG. 8 is a plan view of one pixel of the liquid crystal display panel of the sixth embodiment.

[First Embodiment]
The liquid crystal display panel 10A of the present embodiment is a horizontal electric field type FFS mode liquid crystal display panel. The configuration of the main part of the liquid crystal display panel 10A will be described with reference to FIGS. As shown in FIG. 1, one pixel 11 </ b> A of the liquid crystal display panel 10 </ b> A has red sub-pixels 12 that are the three primary colors of light.
It is composed of RA, a green sub-pixel 12GA, and a blue sub-pixel 12BA.
The color of one pixel 11A is determined by the color mixture of the two sub-pixels.

As shown in FIG. 3, the first polarizing plate 13 is attached to the back side of the liquid crystal display panel 10 </ b> A, the second polarizing plate 14 is attached to the display surface side, and the back side of the first polarizing plate 13 is provided. A backlight device 15 for irradiating the liquid crystal display panel 10A with light is disposed.

As shown in FIGS. 2 and 3, the liquid crystal display panel 10A is configured such that the liquid crystal layer LC is sandwiched between the array substrate AR and the color filter substrate CF. The array substrate AR is based on a first transparent substrate 16 made of transparent insulating glass, quartz, plastic or the like. First
On the transparent substrate 16, as shown in FIG. 2, a scanning line 17 made of a metal such as aluminum or molybdenum extends in the X-axis direction (row direction) in FIG. 1 on the side facing the liquid crystal LC. Is formed. From the scanning line 17, the gate electrode G is formed so as to extend to the lower left of each of the sub-pixels 12RA, 12GA, 12BA.

A transparent gate insulating film 18 made of silicon nitride, silicon oxide or the like is laminated so as to cover the scanning line 17 and the gate electrode G. A semiconductor layer 19 made of amorphous silicon, polycrystalline silicon, or the like is formed on the gate insulating film 18 that overlaps the gate electrode G in plan view. A plurality of signal lines 20 made of a metal such as aluminum or molybdenum are formed on the gate insulating film 18 so as to extend to the left side of each of the sub-pixels 12RA, 12GA, and 12BA in the Y-axis direction (column direction) in FIG. Has been. A source electrode S extends from the signal line 20, and the source electrode S is in partial contact with the surface of the semiconductor layer 19.

Further, a drain electrode D simultaneously formed of the same material as the signal line 20 and the source electrode S is provided on the gate insulating film 18, and the drain electrode D is disposed in the vicinity of the source electrode S and the semiconductor layer 19. Partially touching. A region surrounded by the scanning lines 17 and the signal lines 20 corresponds to one sub-pixel region. Since one pixel is substantially square, the sub-pixels 12RA, 12GA, and 12BA that divide the pixel into three are rectangles having a short side on the scanning line 17 side and a long side on the signal line 20 side. The gate electrode G, the gate insulating film 18, the semiconductor layer 19, the source electrode S, and the drain electrode D constitute a thin film transistor TFT serving as a switching element, and this TFT is formed in each of the sub-pixels 12RA, 12GA, and 12BA.

Further, a transparent passivation film 21 made of, for example, silicon nitride or silicon oxide is laminated so as to cover the exposed portions of the signal line 20, the TFT, and the gate insulating film 18. Then, a planarizing resin layer 22 made of a transparent resin material such as a photoresist is laminated so as to cover the passivation film 21. A lower electrode 23 made of a transparent conductive material such as ITO (Indium Thin Oxide) or IZO (Indium Zinc Oxide) is formed so as to cover the planarizing resin layer 22. A contact hole 24 that penetrates the planarizing resin layer 22 and the passivation film 21 and reaches the drain electrode D is formed, and the lower electrode 23 and the drain electrode D are electrically connected through the contact hole 24. . Therefore, here, the lower electrode 23 operates as a pixel electrode.

A transparent interelectrode insulating film 25 made of, for example, silicon nitride or silicon oxide is laminated so as to cover the lower electrode 23. Then, ITO or I is formed so as to cover the interelectrode insulating film 25.
An upper electrode 26 made of a transparent conductive material such as ZO is formed. Each sub-pixel upper electrode 21 is integrally formed and operates as a common electrode. As shown in FIG. 1, the upper electrode 26 has a plurality of slit-shaped openings 27A. The slit-shaped opening 27A has an oval shape,
The longitudinal direction is inclined to the right by 5 degrees, for example, with respect to the extending direction of the scanning line 17. An alignment film 28 made of polyimide is laminated so as to cover the upper electrode 26. The alignment film 28 is subjected to a liquid crystal direction alignment process (rubbing process) in parallel with the extending direction of the signal line 20. The orientation of the liquid crystal molecules in the liquid crystal layer LC changes due to the electric field between the lower electrode 23 and the upper electrode 26 at a position corresponding to the slit-shaped opening 27A.

The color filter substrate CF is based on a second transparent substrate 29 made of transparent insulating glass, quartz, plastic or the like. The second transparent substrate 29 is formed with a light shielding layer 30 and a color filter layer 31 that transmits light of different colors (for example, R, G, B) for each subpixel. As shown in FIG. 1, the light shielding layer 30 is an opaque region, that is, the scanning line 17 and the signal line 2.
0, the TFT, and the drain electrode D are formed so as to overlap in plan view. Sub-pixel 12RA
, 12GA and 12BA are regions where the light shielding layer 30 is not formed, and a color filter layer 31 is formed there. An overcoat layer 32 made of a transparent resin material such as a photoresist is laminated so as to cover the light shielding layer 30 and the color filter layer 31. The overcoat layer 32 is provided to flatten the steps due to the color filter layers 31 of different colors, and to block impurities flowing out from the light shielding layer 30 and the color filter layer 31 from entering the liquid crystal layer LC. Is. An alignment film 33 made of polyimide, for example, is formed so as to cover the overcoat layer 32. The alignment film 33 is subjected to a liquid crystal alignment process in the direction opposite to that of the alignment film 28.

The array substrate AR and the color filter substrate CF thus formed are opposed to each other, a sealing material (not shown) is provided around both substrates, the two substrates are bonded together, and liquid crystal is filled between the substrates. Thus, the liquid crystal display panel 10A according to the first embodiment is obtained. A spacer (not shown) for holding the liquid crystal layer CL at a predetermined thickness is a color filter substrate C.
F is formed.

With the configuration described above, when a voltage is applied between the lower electrode 23 and the upper electrode 26 with the TFT turned on, an electric field is generated between the electrodes 23 and 26 and the orientation of the liquid crystal molecules in the liquid crystal layer LC changes. To do. As a result, the light transmittance of the liquid crystal layer LC changes and an image is displayed. Lower electrode 23
The auxiliary capacitor is formed by the upper electrode 26 and the interelectrode insulating film 25, and when the TFT is turned off, the electric field between the electrodes 23 and 26 is held for a predetermined time.

A voltage corresponding to, for example, an 8-bit gradation (0 gradation to 255 gradation) is applied to the red sub-pixel 12RA, the green sub-pixel 12GA, and the blue sub-pixel 12BA.
It can be displayed in various concentrations. In design, all the sub-pixels 12RA, 12GA, 1
If 2BA has the same gradation at the same time, white display is performed. However, in the liquid crystal display panel 10A of the first embodiment, the chromaticity and luminance balance of R, G, and B are lost due to the difference in the behavior of liquid crystal molecules in the liquid crystal display panel 10A, process variation, etc. 12RA
, 12GA, 12BA, even when a voltage of 255 gradations is applied, yellow may occur instead of being completely white. Therefore, in the liquid crystal display panel 10A of the first embodiment, as shown in FIG. 1, the light shielding layer 30 that overlaps the scanning line on the short side above the blue subpixel 12BA is L in the column direction.
1, the aperture ratio of the blue sub-pixel 12BA is made smaller than the aperture ratios of the red sub-pixel 12RA and the green sub-pixel 12GA.

On the short side of the sub-pixel 12BA, the end portion 34A of the slit-shaped opening 27A is reduced.
Since the end portion 34A of the slit-shaped opening 27A has a reverse twist domain in which the rotation direction of the liquid crystal molecules is reversed, the end portion 34A is easily affected by variations in liquid crystal behavior during driving and changes in luminance due to positional deviation during assembly. For this reason, when the aperture ratio is adjusted by shielding the end portion 34A of the slit-shaped opening 27A where the luminance change is likely to occur with the light shielding layer 30, an error between the calculated design value and the luminance may increase.

In the liquid crystal display panel 10A of the first embodiment, by extending the light shielding layer 30 on the short side with few end portions 34A of the slit-shaped opening 27A in the column direction, an error between the calculated design value and the luminance is reduced. You can make it smaller. Further, as described above, the light shielding layer 30 on the short side of the sub-pixel 12BA extends in the column direction, thereby covering the same area as compared with the case where the light shielding layer 30 on the long side extends in the row direction. In this case, the light shielding layer 30 can be extended longer, so that fine adjustment can be easily performed.

[Second Embodiment]
The structure of the liquid crystal display panel 10B of 2nd Embodiment is demonstrated using FIG. The difference between the liquid crystal display panel 10B of the second embodiment and the liquid crystal display panel 10A of the first embodiment is that
Only the configuration of the slit-shaped opening and the light shielding layer is used, and the other configurations are the same. Therefore, in the liquid crystal display panel 10B of the second embodiment, the same reference numerals are given to the same components as those of the liquid crystal display panel 10A of the first embodiment, and detailed description thereof is omitted.

In the liquid crystal display panel 10B of the second embodiment, the color mixture is adjusted by reducing the aperture ratio of the blue sub-pixel 12BB, similarly to the liquid crystal display panel 10A of the first embodiment. As shown in FIG. 4, the slit-shaped opening 27 </ b> B of the second embodiment has an oval shape, and its longitudinal direction is inclined to the right by about 5 degrees with respect to the extending direction of the signal line 20. Therefore, the end 34B of the slit-shaped opening 27B is smaller on the long side side (the signal line 20 side) of the sub-pixels 12RB, 12GB, and 12BB. Therefore, the light shielding layer 30 according to the second embodiment includes the blue sub-pixel 12B.
The light shielding layer 30 that overlaps the signal line 20 on the left long side of B is extended by L2 in the row direction, so that the aperture ratio of the blue sub-pixel 12BB is higher than that of the red sub-pixel 12RB and the green sub-pixel 12GB. It is getting smaller. Thereby, also the liquid crystal display panel 10B of 2nd Embodiment can make small the difference | error with the brightness | luminance of the calculated design value.

[Third Embodiment]
The configuration of the liquid crystal display panel 10C of the third embodiment will be described with reference to FIG. The difference between the liquid crystal display panel 10C of the third embodiment and the liquid crystal display panel 10A of the first embodiment is that
Only the configuration of the slit-shaped opening and the light shielding layer is used, and the other configurations are the same. Therefore, in the liquid crystal display panel 10C of the third embodiment, the same reference numerals are given to the same components as those of the liquid crystal display panel 10A of the first embodiment, and detailed description thereof is omitted.

In the liquid crystal display panel 10C of the third embodiment, the color mixture is adjusted by reducing the aperture ratio of the blue sub-pixel 12BC, similarly to the liquid crystal display panel 10A of the first embodiment. As shown in FIG. 5, the slit-shaped opening 27 </ b> C of the third embodiment has an elliptical shape bent in a vertical “<” shape. Therefore, the end portion 34C of the slit-shaped opening 27C is the sub pixel 12RC.
, 12GC and 12BC have fewer long sides (signal line 20 side). Therefore, the light shielding layer 30 of the third embodiment overlaps with the signal line 20 on the left long side of the blue sub-pixel 12BC.
Is extended by L3 in the row direction, and the aperture ratio of the blue sub-pixel 12BC is red.
It is smaller than RC and green sub-pixel 12GC. As a result, the liquid crystal display panel 10C of the third embodiment can also reduce an error between the calculated design value and the luminance.

[Fourth Embodiment]
The configuration of the liquid crystal display panel 10D of the fourth embodiment will be described with reference to FIG. The difference between the liquid crystal display panel 10D of the fourth embodiment and the liquid crystal display panel 10A of the first embodiment is that
Only the configuration of the slit-shaped opening and the light shielding layer is used, and the other configurations are the same. Therefore, in the liquid crystal display panel 10D of the fourth embodiment, the same reference numerals are given to the same components as those of the liquid crystal display panel 10A of the first embodiment, and the detailed description thereof is omitted.

Similar to the liquid crystal display panel 10A of the first embodiment, the liquid crystal display panel 10D of the fourth embodiment is adjusted for color mixing by reducing the aperture ratio of the blue sub-pixel 12BD. As shown in FIG. 6, the slit-shaped opening 27 </ b> D of the fourth embodiment has an elliptical shape bent in a downward horizontal “<” shape. Therefore, the end 34D of the slit-shaped opening 27D is smaller on the short side (scanning line 17 side) of the sub-pixels 12RD, 12GD, and 12BD. Therefore, in the light shielding layer 30 of the fourth embodiment, the light shielding layer 30 that overlaps the scanning line 17 on the short side above the blue subpixel 12BD is extended by L4 in the column direction, and the red pixel has an aperture ratio of red. It is smaller than 12RD and green subpixel 12GD. Thereby, the liquid crystal display panel 1 of the fourth embodiment.
0D can also reduce an error between the calculated design value and the brightness.

[Fifth Embodiment]
The configuration of the liquid crystal display panel 10E of the fifth embodiment will be described with reference to FIG. The difference between the liquid crystal display panel 10E of the fifth embodiment and the liquid crystal display panel 10A of the first embodiment is that
Only the configuration of the slit-shaped opening and the light shielding layer is used, and the other configurations are the same. Therefore, in the liquid crystal display panel 10E of the fifth embodiment, the same reference numerals are given to the same components as those of the liquid crystal display panel 10A of the first embodiment, and detailed description thereof is omitted.

In the liquid crystal display panel 10E of the fifth embodiment, the color mixture is adjusted by reducing the aperture ratio of the green sub-pixel 12GE by 6% and decreasing the aperture ratio of the blue sub-pixel 12BE by 10%. As shown in FIG. 7, the slit-shaped opening 27E of the fifth embodiment has an oval shape,
The extension direction in the longitudinal direction is formed with a region inclined to the right by about 5 degrees and a region inclined to the right by about 5 degrees with respect to the extending direction of the scanning line 17. Thus, by providing the regions where the extending directions of the slit-like openings are different, the VT characteristics are different in each region, so that the color difference due to the viewing angle can be reduced.

The aperture ratio of the red sub-pixel 12RE is 55% in the area rising to the right of the slit-shaped aperture 27E.
Thus, the area to the lower right is 45%. The aperture ratio of the green sub-pixel 12GE is such that the upper right and left light-shielding layers 30 extend in directions L6 and L7 that are close to each other, so that the right-up region of the slit-like opening 27E is 52% and the right-side down This area is 42%. The aperture ratio of the blue sub-pixel 12BE is such that the upper and lower short-side light shielding layers 30 are connected to each other by L8 and L9.
As a result of extending in the approaching direction, the upward-sloping region of the slit-shaped opening 27E is 50
%, The downward-sloping area is 40%. As described above, since the aperture ratio is reduced for each of the regions where the extending directions of the plurality of slit-like openings are different from each other, an error between the calculated design value and the luminance can be reduced, and the field of view can be reduced. The color difference due to the corners can be reduced.

In the liquid crystal display panel 10E of the fifth embodiment, the aperture ratio is small even by the light shielding layer formed along the short side facing the short side on the side where the number of ends of the slit-shaped opening is zero or the minimum. An example that has been shown. Such a method of adjusting the aperture ratio can be similarly applied even when the slit-shaped opening is bent in a horizontal “<” shape like the liquid crystal display panel 10D of the fourth embodiment. Further, even when the slit opening is bent in a vertical “<” shape as in the liquid crystal display panel 10C of the third embodiment, the number of ends of the slit opening is zero or the minimum. It can also be reduced by a light shielding layer formed along the long side opposite to the long side.

[Sixth Embodiment]
The configuration of the liquid crystal display panel 10F of the sixth embodiment will be described with reference to FIG. The liquid crystal display panel 10F of the sixth embodiment is different in configuration from the liquid crystal display panel 10A of the first embodiment.
Only the configuration of the slit-shaped opening and the light shielding layer is used, and the other configurations are the same. Therefore, in the liquid crystal display panel 10F of the sixth embodiment, the same reference numerals are given to the same components as those of the liquid crystal display panel 10A of the first embodiment, and detailed description thereof is omitted.

Similar to the liquid crystal display panel 10A of the first embodiment, the liquid crystal display panel 10F of the sixth embodiment is adjusted for color mixture by reducing the aperture ratio of the blue sub-pixel 12BF. As shown in FIG. 8, the slit-shaped opening 27 </ b> F of the sixth embodiment has an oval shape, and the longitudinal direction of the slit-shaped opening 27 </ b> F is inclined to the right with respect to the extending direction of the scanning line 17. A region inclined about 5 degrees downward is formed. Red sub-pixel 12RF and green sub-pixel 1
The aperture ratio of 2GF is 50% in the upward-sloping area of the slit-shaped opening 27F and 50% in the downward-sloping area. The aperture ratio of the blue sub-pixel 12BF is such that the upper and lower short-side light shielding layers 30 extend in a direction close to each other by L9 and L10, so that the upward-sloping area of the slit-shaped opening 27F is 45%. The falling area is 45%. Thus, in the liquid crystal display panel 10F of the sixth embodiment, the slit-shaped opening 2 in the blue sub-pixel 12BF.
The ratio of the aperture ratio of the 7F right-up region to the right-down region (1: 1) is determined by the ratio of the right upward aperture ratio of the slit-shaped aperture 27F in the red subpixel 12RF and the green subpixel 12GF to the right. The aperture ratio is reduced so as to be the same as the ratio of the decreasing aperture ratio. Thereby, the liquid crystal display panel 10F of the sixth embodiment can reduce an error between the calculated design value and the viewing angle, and the viewing angle by changing the aperture ratio of the sub-pixel of a specific color. The color difference due to can be reduced.

It is a top view for 1 pixel of the liquid crystal display panel of 1st Embodiment. It is sectional drawing of the II-II line of FIG. It is sectional drawing of the III-III line | wire of FIG. It is a top view for 1 pixel of the liquid crystal display panel of 2nd Embodiment. It is a top view for 1 pixel of the liquid crystal display panel of 3rd Embodiment liquid. It is a top view for 1 pixel of the liquid crystal display panel of 4th Embodiment. It is a top view for 1 pixel of the liquid crystal display panel of 5th Embodiment. It is a top view for 1 pixel of the liquid crystal display panel of 6th Embodiment.

Explanation of symbols

10A to 10F: Liquid crystal display panels 11A to 11F: 1 pixel 12RA to 12RF: Red sub-pixel 12GA to 12GF: Green sub-pixel 12BA to 12BF: Blue sub-pixel 13: First polarizing plate 14: Second polarizing plate 15 : Backlight device 16: First transparent substrate 17: Scanning line 18: Gate insulating film 19: Semiconductor layer 20: Signal line 21: Passivation film 22: Flattening resin layer 23: Lower electrode 24: Contact hole 25:
Interelectrode insulating film 26: upper electrode 27A to 24F: slit 28: alignment film 29: second transparent substrate 30: light shielding layer 31: color filter layer 32: overcoat layer 33: alignment film 34A to 34F: end of (slit) LC: Liquid crystal layer AR: Array substrate CF: Color filter substrate

Claims (10)

A first substrate and a second substrate disposed opposite to each other with a liquid crystal layer interposed therebetween;
The first substrate includes
A plurality of signal lines and scanning lines formed in a matrix in a state of being insulated from each other; an upper electrode having a plurality of slit-like openings formed for each sub-pixel partitioned by the scanning lines and signal lines; An upper electrode and a lower electrode formed on the substrate side through an insulating layer;
In the second substrate,
A light shielding layer formed so as to overlap with the signal line and the scanning line in a plan view, and a color filter layer formed for each sub-pixel partitioned by the scanning line and the signal line,
A liquid crystal display panel in which one pixel is composed of a plurality of subpixels each having a color filter layer of a different color,
The plurality of sub-pixels forming the one pixel are formed with sub-pixels having a smaller aperture ratio than the sub-pixels of other colors,
The sub-pixel having a small aperture ratio is formed by the light-shielding layer formed along the side where the number of ends of the slit-like opening located on each side of the sub-pixel is zero or minimum. A liquid crystal display panel having a small aperture ratio. In each of the plurality of sub-pixels, ends of the plurality of slit-shaped openings are located on the long side of the sub-pixel, and the opening is formed by the light shielding layer formed along the short side of the sub-pixel. The liquid crystal display panel according to claim 1, wherein the rate is reduced. 3. The liquid crystal display panel according to claim 2, wherein in each of the plurality of sub-pixels, the plurality of slit-shaped openings are formed in a horizontal “<” shape along the short side. The aperture ratio is also reduced by a light shielding layer formed along a short side facing a short side on the side where the number of ends of the slit-shaped opening is zero or minimum. 3. A liquid crystal display panel according to 3. 3. The plurality of slit-like openings in each of the plurality of sub-pixels has two groups extending in different directions at an acute angle with respect to the short side. The liquid crystal display panel as described. The aperture ratio is also reduced by a light shielding layer formed along a short side facing a short side on the side where the number of ends of the slit-shaped opening is zero or minimum. 5. A liquid crystal display panel according to 5. The liquid crystal display panel according to claim 6, wherein the ratio of the aperture ratios of the two groups is the same in each of the plurality of sub-pixels. In each of the plurality of sub-pixels, ends of the plurality of slit-shaped openings are located on the short side of the sub-pixel, and the opening is formed by the light-shielding layer formed along the long side of the sub-pixel. The liquid crystal display panel according to claim 1, wherein the rate is reduced. 9. The liquid crystal display panel according to claim 8, wherein in each of the plurality of sub-pixels, the plurality of slit-shaped openings are formed in a vertical “<” shape along the long side. The aperture ratio is also reduced by a light shielding layer formed along a long side facing a long side on the side where the number of ends of the slit-shaped opening is zero or minimum. 9. A liquid crystal display panel according to item 9.

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