TWI537640B - Liquid crystal display panel - Google Patents

Description

LCD panel

The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel having multi-domains alignment.

With the advancement of technology, flat display devices have been widely used in various fields, especially liquid crystal display devices. Due to their superior characteristics such as slimness, low power consumption and no radiation, they have gradually replaced traditional cathode ray tube display devices. It is applied to many kinds of electronic products, such as mobile phones, portable multimedia devices, notebook computers, LCD TVs and LCD screens.

A liquid crystal display device includes a liquid crystal display panel (LCD Panel) and a backlight module (Backlight Module), which are oppositely disposed. The liquid crystal display panel mainly comprises a color filter substrate, a thin film transistor substrate and a liquid crystal layer sandwiched between the two substrates, and the color filter substrate and the thin film transistor substrate and the liquid crystal layer can form a plurality of pixels arranged in an array. unit. The backlight module emits light through the liquid crystal display panel and displays an image through each pixel unit of the liquid crystal display panel to form an image.

At present, manufacturers of liquid crystal display devices have adopted a photo-alignment technology to control the alignment direction of liquid crystal molecules in a wide viewing angle technology for improving a vertical alignment (VA) type liquid crystal display panel, thereby improving the alignment direction of liquid crystal molecules. Optical performance and yield of liquid crystal display panels. The photo-alignment technique forms a multi-domain alignment within each pixel unit of the panel such that liquid crystal molecules within one pixel unit are dumped, for example, in four different directions. Wherein, the optical alignment technique uses an ultraviolet light source (for example, polarized light) to illuminate a polymer film (alignment layer) on one of the color filter substrate or the thin film transistor substrate, so that the polymer structure on the surface of the film is uneven. The photopolymerization, isomerization or cleavage reaction induces a special directionality on the chemical bond structure on the surface of the film to further induce the liquid crystal molecules to align in order to achieve optical alignment.

However, if the color filter substrate and the thin film transistor substrate are misaligned due to process accuracy problems due to process accuracy problems, the display quality of the liquid crystal display panel is degraded.

Therefore, how to provide a liquid crystal display panel can improve the problems caused by offset and misalignment of the two substrates, and further improve the display quality of the liquid crystal display panel, which has become one of the important topics.

In view of the above problems, an object of the present invention is to provide a liquid crystal display panel which can improve the problems caused by offset and misalignment of the two substrates and further improve the display quality of the liquid crystal display panel.

To achieve the above object, a liquid crystal display panel according to the present invention includes a plurality of pixel units, a first alignment layer, and a second alignment layer. The pixel units are arranged in a matrix of rows and columns, and each pixel unit is divided into a plurality of fields. The alignment direction of the first alignment layer is parallel to the row direction, and the alignment direction of the second alignment layer is parallel to the column direction. The fields of the pixel units are defined by the first alignment layer and the second alignment layer by different liquid crystal molecules tilting directions, and in any two adjacent pixel units in the column direction, adjacent to the boundary between the two The same alignment direction of the liquid crystal molecules is defined by the first alignment layer and the second alignment layer.

In an embodiment, the liquid crystal display panel further includes a first substrate and a second substrate. The second substrate is disposed opposite to the first substrate, wherein the first alignment layer is formed on one of the first substrate and the second substrate, and the second alignment layer is formed on the other of the first substrate and the second substrate.

In one embodiment, the fields of each pixel unit are arranged in a matrix of rows and columns, and the fields of the first row and the second row of the second column of each pixel unit are respectively associated with the third column The fields of the first row and the second row are oriented in the same direction.

In one embodiment, in any two pixel units adjacent in the row direction, the fields adjacent to the boundary between the two are defined by the first alignment layer and the second alignment layer to have the same liquid crystal molecule tilting direction.

In one embodiment, the pixel units include a first pixel unit, a second pixel unit, a third pixel unit, and a fourth pixel unit. The first pixel unit is in the row direction and the first pixel unit. The two pixel units are adjacently arranged, and the first pixel unit is adjacent to the third pixel unit along the column direction. And the third pixel unit is disposed adjacent to the fourth pixel unit in the row direction.

In one embodiment, the first alignment layer corresponds to the first direction of the row direction of the first row of the first pixel unit and the second pixel unit, and corresponds to the first pixel unit. And the direction of alignment of the fields of the second row of the second pixel unit is the second direction of the row direction.

In one embodiment, the first alignment layer corresponds to the second direction of the row direction of the first row of the third pixel unit and the fourth pixel unit, and corresponds to the third pixel unit. And the direction of alignment of the fields of the second row of the fourth pixel unit is the first direction of the row direction.

In an embodiment, the second alignment layer corresponds to the first direction and the second direction of the column direction of the second pixel and the third column of the first pixel unit and the third pixel unit. And the second alignment layer corresponds to the first direction and the second direction of the first direction and the fourth column of the first pixel unit and the third pixel unit. One of them.

In one embodiment, the second alignment layer corresponds to an alignment direction of the first and third columns of the first and third pixel units, and corresponds to the second pixel unit and the fourth The alignment directions of the fields of the second column and the third column of the pixel unit are the same as the first direction and the second direction of the column direction.

In one embodiment, the second alignment layer corresponds to an alignment direction of the first and third columns of the first and third pixel units, and corresponds to the second pixel unit and the fourth The alignment directions of the fields of the second column and the third column of the pixel unit are opposite to each other in the column direction.

In an embodiment, the liquid crystal display panel includes a curved display panel.

To achieve the above objective, a liquid crystal display panel includes a first substrate, a second substrate, a first alignment layer, and a second alignment layer. The first substrate has a curved side in the column direction. The second substrate is disposed opposite to the first substrate. The first alignment layer is formed on one of the first substrate and the second substrate, and the alignment direction thereof is parallel to the row direction. The second alignment layer is formed on the other of the first substrate and the second substrate, and the alignment direction thereof is parallel to the column direction.

In one embodiment, the radius of curvature of the sides is between 500 mm and 10,000. Between the metrics.

In one embodiment, the radius of curvature of the sides is between 2000 and 6000 mm.

As described above, in the liquid crystal display panel of the present invention, a plurality of pixel units are arranged in a matrix of rows and columns, and each pixel unit is divided into a plurality of fields. Further, the alignment direction of the first alignment layer is parallel to the row direction, and the alignment direction of the second alignment layer is parallel to the column direction. In addition, the fields of the pixel units are defined by the first alignment layer and the second alignment layer by different liquid crystal molecules tilting directions, and in any two adjacent pixel units in the column direction, adjacent to the boundary between the two The fields are defined by the first alignment layer and the second alignment layer to have the same liquid crystal molecule tilting direction. Therefore, for the entire liquid crystal display panel, the problem of imbalance in the fields caused by the offset or misalignment in the pixels will be solved by the self-compensation effect of all the pixel units, so that the pixels can be improved. The imbalance of the field area affects the optical performance of the side view, which in turn makes the liquid crystal display panel have better display quality.

1, 2‧‧‧ LCD panel

11, 21‧‧‧ first substrate

12, 22‧‧‧ second substrate

13‧‧‧First alignment layer

14‧‧‧Second alignment layer

A1‧‧‧First District

A2‧‧‧Second District

AA‧‧‧ display surface

B‧‧‧Blue

BM‧‧‧ black matrix layer

C, D‧‧‧ fields

CF‧‧‧ color filter substrate

G‧‧‧Green

n, n+1, n+2‧‧‧

m, m+1, m+2‧‧‧ columns

S1‧‧‧ first side

S2‧‧‧ first side

P1~P4‧‧‧ pixel unit

R‧‧‧Red

TFT‧‧‧thin film transistor substrate

X‧‧‧ direction

X1, Y1‧‧‧ first direction

X2, Y2‧‧‧ second direction

Y‧‧‧ direction

‧‧‧dark lines

1 is a side elevational view of a liquid crystal display panel in accordance with a preferred embodiment of the present invention.

2 is a top plan view of the liquid crystal display panel of FIG. 1.

3A to 3D are schematic diagrams of the adjacent pixel units P1 to P4 applied to the liquid crystal display panel by the optical alignment process, respectively.

FIG. 3E is a schematic diagram of the fields of two adjacent pixel units in the column direction when the thin film transistor substrate and the color filter substrate are accurately aligned.

FIG. 3F is a schematic view showing the fields of two adjacent pixel units in the column direction when the thin film transistor substrate and the color filter substrate are misaligned. FIG.

4A to FIG. 6D are respectively schematic diagrams showing different implementations of the adjacent pixel units P1 to P4 applied to the liquid crystal display panel by the optical alignment process.

7A to 7D are schematic views showing still another embodiment of the adjacent pixel units P1 to P4 applied to the liquid crystal display panel by the photo-alignment process.

FIG. 7E is a schematic diagram showing the dark lines of the pixel units of a liquid crystal display panel according to a preferred embodiment of the present invention.

8A and 8B are respectively a perspective view and a top view of a liquid crystal display panel according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal display panel according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

1 and FIG. 2, wherein FIG. 1 is a side view of a liquid crystal display panel 1 according to a preferred embodiment of the present invention, and FIG. 2 is a top plan view of the liquid crystal display panel 1 of FIG.

The liquid crystal display panel 1 includes a first substrate 11, a second substrate 12, and a liquid crystal layer (not shown). The liquid crystal layer is sandwiched between the first substrate 11 and the second substrate 12 and has a plurality of liquid crystal molecules. The first substrate 11, the second substrate 12, and the liquid crystal layer may form a plurality of pixel units, and the pixel units are arranged in a matrix composed of a column and a column, each pixel. The unit is divided into a plurality of domains (Multi-domain), and the fields of each pixel unit are arranged in a matrix of rows and columns. The first substrate 11 can be a thin film transistor substrate, and the second substrate 12 can be a color filter substrate. Or in other embodiments, the first substrate 11 can be a color filter substrate, and the second substrate 12 can be a thin film transistor substrate. In this embodiment, the first substrate 11 is a thin film transistor substrate. The thin film transistor substrate is formed with a circuit for driving each pixel unit, and the second substrate 12 is a color filter substrate. The color filter substrate is used as an example. A color filter layer (having a red R, a green G, and a blue B) is formed. However, the black matrix and the color filter layer on the color filter substrate may be respectively disposed on the thin film transistor substrate to make it a BOA (BM on array) substrate, or become a COA (color filter). The on array substrate is not limited.

The liquid crystal display panel 1 further includes a first alignment layer 13 and a second alignment layer 14. The alignment direction of the first alignment layer 13 is parallel to the row direction Y of the pixel units arranged in a matrix, and the alignment direction of the second alignment layer 14 is parallel to the column direction X of the pixel units arranged in a matrix. Here, as shown in FIG. 2 , the row direction Y refers to a vertical direction (vertical direction) when the liquid crystal display panel 1 is viewed in a plan view, and the column direction X refers to a horizontal direction (left and right direction) when the liquid crystal display panel 1 is viewed from above. The row direction Y and the column direction X are substantially perpendicular to each other. The row direction Y has a first direction from top to bottom and a second direction from bottom to top, and the column direction X has left to right The first direction and the second direction from right to left will be described below.

The first alignment layer 13 may be formed in the first substrate 11 and the second substrate 12 One of the first alignment layers 14 may be formed on one of the first substrate 11 and the second substrate 12. In other words, if the first alignment layer 13 is formed on the first substrate 11, the second alignment layer 14 is formed on the second substrate 12; otherwise, if the first alignment layer 13 is formed on the second substrate 12, the second alignment layer 14 is Formed on the first substrate 11. In this embodiment, the first alignment layer 13 is formed on the first substrate 11 (thin film transistor substrate), and the second alignment layer 14 is formed on the second substrate 12 (color filter substrate). The material of the first alignment layer 13 and the second alignment layer 14 is, for example but not limited to, polyimide (PI).

Through the light alignment process, and using the first alignment layer 13 and the second alignment layer 14, Different liquid crystal molecules tilting directions can be defined in each pixel unit of the liquid crystal display panel 1. Here, four different liquid crystal molecules tilting directions are taken as an example. Specifically, under specific exposure conditions, the alignment layer on the thin film transistor substrate (hereinafter referred to as TFT) side may be aligned to, for example, the first direction or the second direction in the row direction Y, and the color filter substrate (hereinafter referred to as The alignment layer on the CF side is aligned in the first direction or the second direction, for example, in the column direction X, and the alignment direction of the liquid crystal molecules in the multi-domain is formed by the combination and combination of the alignment layers on the TFT side and the CF side. Hereinafter, the contents thereof will be described in detail with reference to the related drawings.

Please refer to FIG. 3A to FIG. 3D, which are respectively applied to the liquid alignment process. A schematic diagram of adjacent pixel units P1 to P4 of the crystal display panel 1. 3A and 3B are respectively a schematic view showing the alignment direction of the alignment layer on the TFT side and the alignment layer on the CF side, and FIG. 3C is a schematic diagram showing the tilting direction of the liquid crystal molecules in each of the pixel units P1 to P4, and FIG. 3D is A dark line diagram generated by the pixel units P1 to P4. Here, the pixel units P1 to P4 can be regarded as one group, and a plurality of P1 to P4 groups are formed into a matrix pixel unit. In addition, the pixel unit P1 and the pixel unit P2 are adjacent in the row direction Y, and the pixel unit P3 and the pixel unit P4 are also adjacent in the row direction Y, and the pixel unit P1 and the pixel unit P3 are in the column direction. X is adjacent, and pixel unit P2 and pixel unit P4 are also adjacent in column direction X.

Each pixel unit (such as P1, P2, P3 or P4) represents the liquid crystal display surface A subpixel of the board 1. In this embodiment, as shown in FIG. 3C, the pixel units P1 to P4 are respectively divided into 8 fields, and 8 fields can be arranged into four columns and two rows, so the pixel is single. The elements P1 to P4 have the first column to the fourth column in order from top to bottom; the first row and the second row are sequentially arranged from left to right. However, in other implementations, the pixel units P1 to P4 can also be divided into four fields, and the four fields can be arranged in two columns or two rows; or, the pixel units P1 to P4 can also be They are respectively divided into 16 fields, and 16 fields can be arranged in 8 columns and 2 rows or the like. The present invention does not limit the number of fields in which each pixel unit is distinguished.

Please refer to FIG. 3C again, the first column and the second column of each pixel unit. These fields belong to a first zone A1, and the fields of the third column and the fourth column belong to a second zone A2. The first area A1 and the second area A2 are electrically connected to the same scanning line, respectively, and the image data is provided by different data lines. The liquid crystal display panel 1 can be made by dividing each pixel unit into two regions and combining the gamma curves of the two regions on the off-axis side view to obtain a gamma curve close to the front view. Good display quality.

In addition, the direction of the arrow of FIG. 3A or FIG. 3B is the matching of the TFT side or the CF side. The direction of the alignment of the layers, and the direction of the arrows in the respective fields of FIG. 3C is the direction in which the liquid crystal molecules (long axis) are tilted, which is the resultant direction of the TFT side alignment layer and the CF side alignment layer in the field. For example, the alignment direction of the alignment layer on the TFT side is the first direction Y1 (downward) of the row direction Y, and the alignment direction of the alignment layer on the CF side is the second direction X2 (to the left) of the column direction X, and the liquid crystal molecules will fall. The direction to the lower left, as indicated by the direction of the arrow in the field of the first column of the first row of the pixel unit P1, and so on.

Referring to FIG. 3A and FIG. 3C again, the TFT side alignment layer corresponds to the first picture. The alignment direction of the fields of the first row of the prime unit P1 and the second pixel unit P2 is the first direction Y1 of the row direction Y, and corresponds to the second of the first pixel unit P1 and the second pixel unit P2. The direction of alignment of the fields of the row is the second direction Y2 of the row direction Y. In addition, the alignment direction of the TFT side alignment layer corresponding to the first row of the third pixel unit P3 and the fourth pixel unit P4 is the second direction Y2 of the row direction Y, and corresponds to the third pixel unit. The alignment direction of the fields of the second row of P3 and the fourth pixel unit P4 is the first direction Y1 of the row direction Y.

In addition, as shown in FIG. 3B and FIG. 3C, the CF side alignment layer corresponds to the first pixel. The alignment directions of the fields of the second column and the third column of the cell P1 and the third pixel unit P3 are the same as the first direction X1 of the column direction X, and correspond to the first pixel unit P1 and the third pixel unit. The alignment directions of the fields of the first column and the fourth column of P3 are the same as the second direction X2 of the column direction X. with Similarly, the CF side alignment layer corresponds to the first direction X1 of the column direction X corresponding to the alignment direction of the fields of the second column and the third column of the second pixel unit P2 and the fourth pixel unit P4, and corresponds to The alignment directions of the first and fourth columns of the second pixel unit P2 and the fourth pixel unit P4 are the same as the second direction X2 of the column direction X. Here, the CF side alignment layer corresponds to the alignment directions of the fields of the second and third columns of the first pixel unit P1 and the third pixel unit P3, and corresponds to the second pixel unit P2 and the fourth The alignment directions of the fields of the second column and the third column of the pixel unit P4 are the same as the first direction X1 of the column direction X.

In addition, as shown in FIG. 3C and FIG. 3D, the first area A1 of each pixel unit or The fields of the second region A2 define four different liquid crystal molecule tilting directions by the TFT side alignment layer and the CF side alignment layer, respectively. Different liquid crystal tilting directions are observed under a linear polarizer, and two types of dark lines appear on the display: 卍-shaped (with the same sound) and 8-shaped (tilted 8). For example, taking the pixel unit P1 as an example, the liquid crystal tilting directions of the four fields of the first area A1 are combined into a counterclockwise direction, and the corresponding dark lines are corresponding to the inverted shape of FIG. 3D, and the second area A2 is used. The dark lines corresponding to the liquid crystal tilting direction of the four fields are as shown in the right oblique figure of FIG. 3D. Taking the pixel unit P3 as an example, the dark lines corresponding to the liquid crystal tilting direction of the four areas of the first area A1 are as shown in the left oblique 8-shape of FIG. 3D, and the liquid crystal tilting directions of the four areas of the second area A2. Synthesize clockwise, corresponding to the resulting dark lines as shown in Figure 3D, and so on. Therefore, the direction of alignment of the liquid crystal molecules in the respective fields of the pixel unit of FIG. 3C can be obtained by the alignment direction of the TFT side alignment layer and the CF side alignment layer of FIGS. 3A and 3B, and the dark line structure of FIG. 3D can be obtained. Here, FIG. 3D is referred to as a double 卍 8 design.

Wherein, in any two adjacent pixel units in the column direction X, adjacent to the two These fields of the boundary define the same liquid crystal molecule tilting direction by the alignment layer on the TFT side and the alignment layer on the CF side. In other words, as shown in FIG. 3C, taking the pixel unit P1 and the pixel unit P3 as an example, the liquid crystal molecules in the second row of the pixel unit P1 are tilted in the same direction as the liquid crystal molecules in the first row of the adjacent pixel unit P3. The same direction. Similarly, the liquid crystal molecules in the second row of the pixel unit P2 are tilted in the same direction as the liquid crystal molecules in the first row of the adjacent pixel unit P4.

Therefore, please refer to FIG. 3E and FIG. 3F , wherein FIG. 3E is a schematic diagram of the fields of two adjacent pixel units (eg, P1, P3) in the column direction X when the TFT substrate and the CF substrate are accurately aligned. And FIG. 3F is a column when the TFT substrate and the CF substrate are misaligned. Schematic representation of such fields of up two adjacent pixel units (eg, P1, P3). The reason why the TFT substrate and the CF substrate are misaligned may be caused by insufficient alignment accuracy of the process, or may be caused by the liquid crystal display panel 1 itself being a curved display panel, and is not limited. If it is caused by a curved display panel, the first substrate 11 (and the second substrate 12) of the liquid crystal display panel 1 has a curved side in the column direction X, and the side has a radius of curvature. The radius of curvature of the sides may be, for example, between 500 mm and 10,000 mm. Preferably, the radius of curvature can be between 2000 mm and 6000 mm. Since the alignment direction of the second alignment layer 14 is parallel to the column direction X of the pixel elements arranged in a matrix, the alignment direction of the liquid crystal display panel 1 along the column direction X and the alignment direction of the second alignment layer 14 (column direction) X) Parallel. The second alignment layer 14 of the liquid crystal display panel 1 of the present embodiment is formed on the second substrate 12 (color filter substrate). Therefore, the alignment direction of the CF side alignment layer can be referred to as the same as the bending direction of the liquid crystal display panel 1.

As shown in FIG. 3E, when the two substrates are not misaligned, the pixel units P1 and P3 are The area within each area is balanced. However, as shown in FIG. 3F, if the TFT substrate and the CF substrate are misaligned, the shift of the pixel elements P1 and P3 in the horizontal direction (column direction X) causes the black matrix layer BM to also shift, thereby causing the pixel to be Areas in these areas are not balanced (field C becomes smaller and field D becomes larger). However, since the colors represented by the pixel units are cyclically arranged in the column direction X, for example, in the manner of RGB, RGB, RGB, etc., if the fields C of all the Rs in the first row on the display panel become smaller, the field D becomes larger. Then, the field C of all the Rs of the fourth row will become larger, the domain D will become smaller, the domain C of all the Rs of the seventh row becomes smaller again, and the domain D becomes larger again, .... Similarly, G and B are the same. Therefore, for the entire liquid crystal display panel 1, the area imbalance in the fields of the pixels will result in a balanced result of the overall field due to the self-compensation effect of all the pixel units, thereby improving the area of the area caused by the misalignment. The imbalance affects the problem of the side view optical performance of the display panel, and the liquid crystal display panel 1 has better display quality.

In addition, please refer to FIG. 3C again, any two pixels adjacent in the row direction Y. In the cell, the fields adjacent to the boundary between the two are defined by the TFT side alignment layer and the CF side alignment layer to have the same liquid crystal molecule tilting direction. Specifically, in the present embodiment, the first row and the second row of the fourth column of the pixel unit P1 and the first row and the second row of the first column of the pixel unit P2 have the same liquid crystal molecule tilting direction.

In addition, the first row and the second row of the second column of each pixel unit are respectively The direction of alignment with the fields of the first row and the second row of the third column is the same. Specifically, in each of the pixel units P1, P2, P3, or P4, the fields of the first row and the second row of the second column are the same as the alignment directions of the fields of the first row and the second row of the third column, respectively. Since the alignment direction of the CF side alignment layer in the first row and the second row of the second column of each pixel unit is the same as the alignment direction of the first row and the second row of the third column, respectively, each pixel unit The liquid crystal tilting direction at the boundary between the first area A1 and the second area A2 is the same. Therefore, if the TFT substrate and the CF substrate are misaligned, the offset of the black matrix layer in the vertical direction (row direction Y) does not cause a discontinuous alignment line between the first region A1 and the second region A2. Therefore, no additional dark lines are generated between the first area A1 and the second area A2 of each pixel unit, and therefore, the transmittance of the liquid crystal display panel 1 is not lowered to affect the display quality thereof.

In addition, please refer to FIG. 4A to FIG. 6D respectively, which are schematic diagrams of different implementations of the adjacent pixel units P1 P P4 applied to the liquid crystal display panel 1 by the optical alignment process.

As shown in FIG. 4A and FIG. 4B, FIG. 4A and FIG. 4B are mainly different from FIG. 3A and FIG. 3B in that the alignment direction of each region in the CF side alignment layer of FIG. 4B is opposite to that of FIG. 3B (FIG. 4A and FIG. 3A). The alignment direction of the TFT side alignment layer is the same). 5A and FIG. 5B, FIG. 5A and FIG. 5B are mainly different from FIG. 3A and FIG. 3B in that the alignment direction of each region in the TFT side alignment layer of FIG. 5A is opposite to that of FIG. 3A (FIG. 5B and FIG. 5B). The alignment direction of the CF side alignment layer of FIG. 3B is the same). 6A and FIG. 6B, the main difference between FIG. 6A and FIG. 6B and FIG. 5A and FIG. 5B is that the alignment direction of each region in the CF side alignment layer of FIG. 6B is opposite to that of FIG. 5B (FIG. 6A and FIG. 6A). The alignment direction of the TFT side alignment layer of FIG. 3A is the same). Therefore, the tilting direction of the liquid crystal molecules in the respective fields of the pixel units P1 to P4 and the corresponding dark lines can be obtained according to the above description, as shown in FIGS. 4C and 4D, 5C and 5D, 6C and 6D. The pattern.

In addition, in the series of FIG. 4, the series of FIG. 5, and the series of FIG. 6, the area imbalance of the fields of each panel of the panel is also balanced by the self-compensation effect of all the pixel units, so FIG. 4 The alignment combination of the series, the FIG. 5 series and the FIG. 6 series can also respectively improve the imbalance of the area of the two substrates due to offset and misalignment, thereby making the liquid crystal display panel 1 have better display quality, and the detailed details thereof can be Referring to the series of Fig. 3 and its description, it will not be described again.

However, please refer to FIG. 3D again, because the dark lines generated in FIG. 3D are double 卍8 type, when the panel is a low gray scale display while all the pixel units in the liquid crystal display panel 1 are turned off, for example, the second area A2 is turned on and the first area A1 is lit, then the row direction Y is seen, nth Each pixel unit of the row (for example, pixel units P1, P2) will appear 卍 of the first region A1, and each pixel unit of the n+1th row (for example, pixel units P3, P4) will appear first. Area A1 of 8. Since the dark lines appearing in the nth row are all 卍, the dark lines appearing in the n+1th row are all 8, and the red R in the column direction is RGB, RGB, RGB... for example, the R of the first row is all 卍, The fourth row of R is all 8, and the seventh row of R is all 卍..., so the viewer will have a problem of bright and dark lines in the vertical direction (row direction Y) due to the unevenness of the red brightness ( Green G and blue B have the same situation).

In order to improve the problem of vertical bright and dark lines, please refer to FIG. 7A to FIG. 7D, It is a schematic diagram of still another embodiment of the adjacent pixel units P1 P P4 of the liquid crystal display panel 1 for the optical alignment process.

7A and 7B are mainly different from FIG. 3A and FIG. 3B in that FIG. 7A The alignment direction of the TFT side alignment layer is the same as that of FIG. 3A, but in the CF side alignment layer of FIG. 7B, the alignment direction of each region is different from that of FIG. 3B. Wherein, the direction of the respective directions of the CF side of the CF side in the row direction Y is X2, X1, X1, X2, X2, X1, X1, X2 (X2, X1, X1, X2 appear repeatedly), but the CF of FIG. 7B The direction in which the sides are in the row direction Y is X2, X1, X1, X2, X1, X2, X2, and X1. Therefore, the tilting direction of the liquid crystal molecules in the respective fields of the pixel units P1 to P4 and the corresponding dark lines can be obtained as shown in FIG. 7C and FIG. 7D according to the above description, and detailed details thereof can be referred to the above description. Narration. Here, FIG. 7D is referred to as a staggered double 卍 8 design.

Wherein, as shown in FIG. 7C, any two pixel units adjacent to each other in the row direction Y (P1) In the regions where P2 or P3 and P4) are adjacent to each other, different regions of the liquid crystal molecules are defined by the TFT side alignment layer and the CF side alignment layer (the fourth column of the pixel unit P1 and the pixel unit P2) The first column is different). In addition, the CF side alignment layer corresponds to an alignment direction (first direction X1) of the fields of the second column and the third column of the first pixel unit P1 and the third pixel unit P3, and corresponds to the second pixel. The alignment directions (the second direction X2) of the fields of the second column and the third column of the cell P2 and the fourth pixel unit P4 are opposite to each other in the column direction X.

Therefore, when the panel is displayed in a low gray scale while all the liquid crystal display panel 1 is When the pixel unit turns off all the second areas A2 and lights up all the first areas A1, as shown in FIG. 7E, the pixel elements of the nth line and the mth column, for example, the dark lines of the first area A1 appear. The pixel element of the nth row and the m+1th column appears as the dark line 8 of the first area A1, and the pixel unit of the mth row and the m+2th column of the nth line appears the dark line of the first area A1..., the n+1th The pixel unit of the mth column appears as the dark line 8 of the first area A1, and the pixel unit of the (m+1)th row and the m+1th column shows the dark line of the first area A1. Therefore, since the pixel units of each row are displayed as 卍8卍8卍8...interlace, there is no problem that the viewer does not have a vertical bright line due to the unevenness of brightness of each line.

It is to be noted that in the illustrations of Figures 7A to 7D, the designer can imitate 4A to 6D, the alignment of the TFT side of FIG. 7A and the alignment of the CF side of FIG. 7B are combined and changed to obtain three different combinations, thereby obtaining liquid crystal molecules of various fields of the pixel unit. The direction of the dumping and the corresponding dark lines are not described here.

In addition, please refer to FIG. 8A and FIG. 8B, which are respectively preferred in the present invention. A schematic perspective view and a top view of a liquid crystal display panel 2 according to another embodiment of the present invention.

The liquid crystal display panel 2 of the embodiment is a curved display panel, and includes a The first substrate 21 and the second substrate 22 are provided. The first substrate 21 is disposed opposite to the second substrate 22. Here, the first substrate 21 is exemplified by a thin film transistor substrate on which a circuit for driving each pixel unit is formed, and the second substrate 22 is exemplified by a color filter substrate on which a color filter layer is formed. . However, in other embodiments, the first substrate 21 can be a color filter substrate, and the second substrate 22 can be a thin film transistor substrate.

The curved liquid crystal display panel 2 has a curved display surface AA, and the display surface AA can be a curved surface. In other words, when the liquid crystal display panel 2 is viewed from the side, both side portions of the liquid crystal display panel 2 may be bent or lifted from the intermediate portion. Here, the lower side portions of the liquid crystal display panel 2 are bent downward as an example. Although the liquid crystal display panel 2 is a curved display panel, when viewed from the liquid crystal display panel 2, it is still displayed as a square (rectangular) as shown in FIG. 8B. In addition, the liquid crystal display panel 2 may further include a liquid crystal layer (not shown). The liquid crystal layer is disposed between the first substrate 21 and the second substrate 22 and has a plurality of liquid crystal molecules (not shown). The first substrate 21 and the second substrate 22 and the liquid crystal layer may form a plurality of pixel units, and the pixel units are arranged in a matrix formed by rows and columns, and each pixel unit is divided into a plurality of pixel units. Domain, and These fields of each pixel unit are arranged in the same matrix form of rows and columns.

The first substrate 21 has a curved first side S1 along the column direction X, and the second base The plate 22 also has a second side S2 corresponding to the curve. The curved first side S1 or the second side S2 has a radius of curvature when viewed from the side of the first substrate 21 perpendicular to the first side S1 (or the second side S2). This embodiment limits the radius of curvature between 500 mm and 10000 mm (500 ≦ radius of curvature ≦ 10000). Preferably, the radius of curvature can be between 2000 mm and 6000 mm (2000 ≦ radius of curvature ≦ 6000).

In addition, the liquid crystal display panel 2 further includes a first alignment layer and a second alignment layer. (Figure not shown). The first alignment layer is formed on one of the first substrate 21 or the second substrate 22, and its alignment direction is parallel to the row direction Y. The second alignment layer is formed on the other of the first substrate 21 or the second substrate 22, and its alignment direction is parallel to the column direction X of the pixel units arranged in a matrix. In other words, if the first alignment layer is formed on the first substrate 21, the second alignment layer is formed on the second substrate; otherwise, if the first alignment layer is formed on the second substrate 22, the second alignment layer is formed on the first substrate. twenty one. In this embodiment, the first alignment layer is formed on the first substrate 21 (TFT), and the second alignment layer is formed on the second substrate 22 (CF).

Due to the alignment direction of the second alignment layer and the pixel units arranged in a matrix Since the column direction X is parallel, the alignment of the liquid crystal display panel 2 in the column direction X is parallel to the alignment direction (column direction X) of the second alignment layer. The second alignment layer of the liquid crystal display panel 2 of the present embodiment is formed on the second substrate 22 (color filter substrate). Therefore, the alignment direction of the CF side alignment layer can be referred to as the same as the bending direction of the liquid crystal display panel 2.

The liquid crystal display panel 2 is a curved display panel, so the color filter substrate and the thin The film transistor substrate may be misaligned, so that the area of the pixels in each pixel is unbalanced and affects the display quality. Therefore, the same as the liquid crystal display panel 1 described above, the light can be transmitted through the optical alignment process, and the film is exposed under specific exposure conditions. The alignment layer of the transistor substrate (TFT) is aligned, for example, in the first direction or the second direction of the row direction Y, and the alignment layer of the color filter substrate side (CF) is aligned to, for example, the first direction or the second direction of the column direction X Direction, and the combination of the two layers of alignment layers to form the tilt direction of the liquid crystal molecules in multiple fields, as well as the self-compensation effect of all pixel units, so that the overall field of the display panel has balanced results. Therefore, the problem that the surface area imbalance caused by the misalignment of the two substrates affects the side optical performance of the liquid crystal display panel 2 is improved, thereby enabling The liquid crystal display panel 2 has a better display quality.

In addition, other technical features of the liquid crystal display panel 2 and the details of the optical alignment process applied to the liquid crystal display panel 2 can be referred to the above, and will not be further described.

In summary, in the liquid crystal display panel according to the present invention, a plurality of pixel units are arranged in a matrix of rows and columns, and each pixel unit is divided into a plurality of fields. Further, the alignment direction of the first alignment layer is parallel to the row direction, and the alignment direction of the second alignment layer is parallel to the column direction. In addition, the fields of the pixel units are defined by the first alignment layer and the second alignment layer by different liquid crystal molecules tilting directions, and in any two adjacent pixel units in the column direction, adjacent to the boundary between the two The fields are defined by the first alignment layer and the second alignment layer to have the same liquid crystal molecule tilting direction. Therefore, for the entire liquid crystal display panel, the problem of imbalance in the fields caused by the offset or misalignment in the pixels will be solved by the self-compensation effect of all the pixel units, so that the pixels can be improved. The imbalance of the field area affects the optical performance of the side view, which in turn makes the liquid crystal display panel have better display quality.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

A1‧‧‧First District

A2‧‧‧Second District

P1~P4‧‧‧ pixel unit

X‧‧‧ direction

Y‧‧‧ direction

Claims (15)

A liquid crystal display panel comprising: a plurality of pixel units arranged in a matrix formed by rows and columns, and each pixel unit is divided into a plurality of fields; and a first alignment layer whose alignment direction is parallel to the row direction a second alignment layer whose alignment direction is parallel to the column direction; a first substrate; and a second substrate opposite to the first substrate, the first alignment layer being formed on the first substrate and the second One of the substrate, the second alignment layer being formed on the other of the first substrate and the second substrate, wherein the fields of the pixel units are the first alignment layer and the second alignment layer Defining different liquid crystal molecules tilting directions, in any two pixel units adjacent in the row direction, the fields adjacent to the boundary between the two are defined by the first alignment layer and the second alignment layer to have the same liquid crystal molecule tilting direction And in any two adjacent pixel units in the column direction, the fields adjacent to the boundary between the two are defined by the first alignment layer and the second alignment layer to have the same liquid crystal molecule tilting direction. The liquid crystal display panel of claim 1, wherein the fields of each pixel unit are arranged in a matrix of rows and columns, and the first row and the second column of each pixel unit The fields of the two rows are the same as the directions of the fields of the first row and the second row of the third column. The liquid crystal display panel of claim 1, wherein the pixel unit comprises a first pixel unit, a second pixel unit, a third pixel unit, and a fourth pixel unit. The first pixel unit is disposed adjacent to the second pixel unit in a row direction, the first pixel unit is disposed adjacent to the third pixel unit in a column direction, and the third pixel unit is along a row direction The fourth pixel unit is disposed adjacent to each other. The liquid crystal display panel of claim 3, wherein the first alignment layer corresponds to a direction of alignment of the fields of the first pixel unit and the first row of the second pixel unit. The first direction, and the direction of alignment of the fields corresponding to the first pixel unit and the second row of the second pixel unit is the second direction of the row direction. The liquid crystal display panel of claim 4, wherein the first alignment layer corresponds to a direction of alignment of the fields of the third pixel unit and the first row of the fourth pixel unit. The second direction, and the direction of alignment of the fields corresponding to the third pixel unit and the second row of the fourth pixel unit is the first direction of the row direction. The liquid crystal display panel of claim 3, wherein the second alignment layer corresponds to an alignment direction of the first pixel unit and the second column and the third column of the third pixel unit. And one of the first direction and the second direction of the column direction, and the second alignment layer corresponds to the first pixel unit and the first column and the fourth column of the third pixel unit The alignment direction is the same as the first direction and the second direction of the column direction. The liquid crystal display panel of claim 3, wherein the second alignment layer corresponds to an alignment direction of the first pixel unit and the second column and the third column of the third pixel unit. And an alignment direction of the fields corresponding to the second pixel unit and the second column and the third column of the fourth pixel unit is one of a first direction and a second direction of the column direction. The liquid crystal display panel of claim 3, wherein the second alignment layer corresponds to an alignment direction of the first pixel unit and the second column and the third column of the third pixel unit. And the alignment directions of the fields corresponding to the second and third columns of the second pixel unit and the fourth pixel unit are opposite to each other in the column direction. The liquid crystal display panel of claim 1, comprising a curved display panel. A liquid crystal display panel includes: a first substrate having a curved side along a column direction; a second substrate disposed opposite the first substrate; a first alignment layer formed on the first substrate and the first substrate One of the two substrates, and the alignment direction thereof is parallel to the row direction; a second alignment layer is formed on the other of the first substrate to the second substrate, and the alignment direction thereof is parallel to the column direction; and a plurality of a pixel unit configured to be a matrix of rows and columns, each pixel unit being divided into a plurality of fields, and the fields of each pixel unit are arranged in a matrix of rows and columns, wherein The first or second column of each pixel unit, or the third and fourth columns The fields of the column are defined by the first alignment layer and the second alignment layer by different liquid crystal molecules tilting directions, and in any two adjacent pixel units in the column direction, the fields adjacent to the boundary between the two are The first alignment layer and the second alignment layer define the same liquid crystal molecule tilting direction. The liquid crystal display panel of claim 10, wherein the radius of curvature of the side is between 500 mm and 10000 mm. The liquid crystal display panel of claim 11, wherein the radius of curvature of the side is more than 2000 mm to 6000 mm. The liquid crystal display panel of claim 10, wherein the fields of the first row and the second row of the second column of each pixel unit are the same as the alignment directions of the first row and the second row of the third column, respectively. . The liquid crystal display panel of claim 10, wherein in any two pixel units adjacent in the row direction, the fields adjacent to the boundary between the two are defined by the first alignment layer and the second alignment layer. The liquid crystal molecules are tilted in the direction. The liquid crystal display panel of claim 10, wherein the pixel unit comprises a first pixel unit, a second pixel unit, a third pixel unit, and a fourth pixel unit. a pixel unit is disposed adjacent to the second pixel unit in a row direction, the first pixel unit is disposed adjacent to the third pixel unit in a column direction, and the third pixel unit is along the row direction The fourth pixel unit is adjacently arranged.