KR20210073807A - Liquid crystal display panel - Google Patents

Abstract

In a heteromorphic liquid crystal display panel, an open ratio by a black matrix is differentially applied according to positions of unit pixels disposed at the edges of a display area and an area located in the display area. According to the present invention, the heteromorphic liquid crystal display panel comprises: a first substrate divided into a display area and a non-display area; a thin film transistor and a pixel electrode disposed in each sub-pixel area; and a black matrix disposed to cover a plurality of gate lines, a plurality of data lines, and the thin film transistor.

Description

A liquid crystal display panel {Liquid crystal display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a type liquid crystal display panel used for a display device for an automobile.

The liquid crystal display device has a tendency to gradually expand its application range due to the characteristics of light weight, thin shape, and low power consumption driving. Such liquid crystal display devices are widely used in portable computers such as notebook PCs, office automation devices, audio/video devices, indoor/outdoor advertisement display devices, display devices for automobiles, and the like.

Since recent automotive display devices require differentiated image quality and differentiated design, in the existing rectangular display device, various types such as a circle type, a corner-cut type, and a curved type are used. A liquid crystal display device is required (異形, Free from).

In such a heterogeneous liquid crystal display, each pixel is formed in a rectangular shape, and an area in which pixels are not disposed is blocked by a black matrix, so that a black matrix at the edge of the heterogeneous liquid crystal display is formed in a stepped shape.

Therefore, there is a problem in that the curved surface of the edge of various types of liquid crystal display devices, such as round, corner cut, curved, etc., is not displayed smoothly and is visually recognized as a step shape like a black matrix type.

SUMMARY OF THE INVENTION The present invention is to solve the problems described above, and it is an object of the present invention to provide a heteromorphic liquid crystal display panel capable of improving step visibility defects by adjusting the black matrix open ratio in the pixels of the edge region of the heterogeneous liquid crystal display device. .

According to the present invention for achieving the above object, a heteromorphic liquid crystal display panel is divided into a display area and a non-display area, and a plurality of gate lines and a plurality of data lines are disposed in the display area to form a plurality of sub-pixel areas. a defined first substrate, thin film transistors and pixel electrodes disposed in each sub-pixel region, and the plurality of gate lines, the plurality of data lines, and the thin film transistors on a second substrate facing the first substrate The unit pixels having a black matrix disposed on the display area have different areas covered by the black matrix according to a location and an area positioned on the display area, so that an open ratio may be differentially applied.

The unit pixels to which the open ratio is differentially applied may be divided into at least three open ratios.

First unit pixels located at the edge and having a small area in the display area have a relatively low open ratio, and second unit pixels located at the edge but having a relatively larger area in the display area than the first unit pixels The second unit pixels have a relatively higher open ratio than the first unit pixel, and third unit pixels located at the edge but having an area located in the display area relatively larger than the second unit pixels are the second unit pixels It may have a relatively higher open ratio.

Assuming an open ratio of unit pixels positioned in the center of the display area with respect to gate lines, data lines, and thin film transistors to be 100%, the first unit pixels have an open ratio of 10% to 30%. covered by a black matrix, the second unit pixels are covered by the black matrix to have an open ratio of 40% to 60%, and the third unit pixels are covered by the black matrix to have an open ratio of 70% to 90% can be covered by

Each unit pixel may have a 1 sub-pixel 2 domain structure, and the black matrix may block a domain boundary of each sub-pixel.

In the black matrix, a first black matrix is disposed at a portion corresponding to a gate line, a data line, and a thin film transistor, a second black matrix is disposed at the domain boundary, and the first and first units in the first unit pixels The width of the second black matrix is the widest, the widths of the first and second black matrices in the second unit pixels are narrower than those of the first unit pixels, and the width of the first and second black matrices in the third unit pixels The width of the second black matrix may be narrower than that of the second unit pixels.

The open ratio may be adjusted by adjusting the width of the first black matrix and the width of the second black matrix, respectively.

The width of the first black matrix may be maintained the same, and the open ratio may be adjusted by adjusting the width of the second black matrix.

The width of the second black matrix may be maintained the same, and the open ratio may be adjusted by adjusting the width of the first black matrix.

Each unit pixel has a 1 sub-pixel 1 domain structure, and the black matrix includes the plurality of gate lines and the plurality of data according to positions of unit pixels disposed at the edge of the display area and an area located in the display area. The open ratio may be differentially applied by increasing or decreasing the area covering the pixel area based on the line and the thin film transistors.

In the molded liquid crystal display panel according to the present invention having the above characteristics, there are the following effects.

First, since the unit pixels disposed at the edge of the display area of the heterogeneous liquid crystal display device differentially apply the open ratio by the black matrix according to the location and the area positioned in the display area, the step difference that is recognized as a step like the black matrix shape Poor visibility can be improved.

Second, in a heteromorphic liquid crystal display panel having a 1-sub-pixel 2-domain structure, the unit pixels disposed at the edge of the display area of the heterogeneous liquid crystal display while blocking the domain boundary of each sub-pixel with a black matrix are positioned and located in the display area. Since the open ratio by the black matrix is differentially applied according to the area where it is located, it is possible to prevent a decrease in transmittance at the domain boundary of each sub-pixel and also prevent a color difference from occurring.

Third, since it is not necessary to apply a round algorithm of the data driving IC, power consumption can be reduced.

1 is a block diagram of a liquid crystal display according to an embodiment of the present invention.
2 is a block diagram of a sub-pixel of a liquid crystal display panel according to the first embodiment of the present invention;
3 is a block diagram of a sub-pixel of a liquid crystal display panel according to a second embodiment of the present invention;
4 is a schematic diagram for explaining a heteromorphic liquid crystal display panel according to the present invention;
5 is an enlarged view of an edge portion of the molded liquid crystal display panel of FIG. 4 according to an embodiment of the present invention;
6A is a plan view of a pixel having an open ratio of 10% to 30% of the heteromorphic liquid crystal display panel according to the present invention;
6B is a cross-sectional view of a pixel having an open ratio of 10% to 30% of the heteromorphic liquid crystal display panel according to the present invention;
7A is a plan view of a pixel having an open ratio of 40% to 60% of the heteromorphic liquid crystal display panel according to the present invention;
7B is a cross-sectional view of a pixel having an open ratio of 40% to 60% of the heteromorphic liquid crystal display panel according to the present invention;
8A is a plan view of a pixel having an open ratio of 70% to 90% of the heteromorphic liquid crystal display panel according to the present invention;
8B is a cross-sectional view of a pixel having an open ratio of 70% to 90% of the heteromorphic liquid crystal display panel according to the present invention;

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only the embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains It is provided to fully understand the scope of the invention, and the present invention is only defined by the scope of the claims.

Since the shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, the present invention is not limited to the matters shown in the drawings. Like reference numerals refer to substantially like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

When "includes", "includes", "having", "consisting of", etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, it may be construed as the plural unless specifically stated otherwise.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship between two components is described as 'on', 'on', 'on', 'beside', ' One or more other elements may be interposed between those elements in which 'directly' or 'directly' are not used. Reference to a device or layer “on” another device or layer includes any intervening layer or other device directly on or in the middle of another device.

1st, 2nd, etc. may be used to distinguish the components, but the functions or structures of these components are not limited to the ordinal number or component name attached to the front of the component.

The following embodiments can be partially or wholly combined or combined with each other, and technically various interlocking and driving are possible. Each of the embodiments may be implemented independently of each other or may be implemented together in a related relationship.

Hereinafter, the heteromorphic liquid crystal display according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram of a liquid crystal display according to an embodiment of the present invention.

Referring to FIG. 1 , in the liquid crystal display 100 according to an embodiment of the present invention, a plurality of data lines DL and a plurality of gate lines GL are disposed, and a plurality of data lines DL ) and a plurality of sub-pixels SP defined by a plurality of gate lines GL are arranged to display an image, and a plurality of data lines DL for driving the plurality of data lines DL are arranged. A data driving circuit 120 , a gate driving circuit 130 driving the plurality of gate lines GL, and a controller 140 controlling the data driving circuit 120 and the gate driving circuit 130 . etc.

The controller 140 supplies various control signals DCS and GCS to the data driving circuit 120 and the gate driving circuit 130 to provide the data driving circuit 120 and the gate driving circuit 130 . control

The controller 140 may align input image data input from the outside according to a data signal format used by the data driving circuit 120 to output the aligned image data Data. For example, the controller 140 may supply image data converted to fit the resolution or sub-pixel structure of the liquid crystal display panel 110 to the data driving circuit 120 .

In addition, the controller 140, in order to control the eater driving circuit 120, a source start pulse (SSP: Source Start Pulse), a source sampling clock (SSC: Source Sampling Clock), a source output enable signal (SOE) : Outputs various data control signals (DCS: Data Control Signal) including Source Output Enable) and polarity control signal (POL).

The polarity control signal POL is a signal for controlling the polarity of data voltages sequentially output from each output channel of the data driving circuit 120 . For example, the polarity control signal POL may be inverted in units of one frame period corresponding to the column inversion method or may be inverted in units of N horizontal periods corresponding to the N vertical dot inversion method.

The controller 140 may be a timing controller used in a typical display device or a control device that further performs other control functions including a timing controller. The controller 140 may be implemented as a separate component from the data driving circuit 120 , or may be integrated with the data driving circuit 120 and implemented as an integrated circuit.

The data driving circuit 120 drives the plurality of data lines DL by receiving image data Data from the controller 140 and supplying data voltages to the plurality of data lines DL. Here, the data driving circuit 120 may be composed of a plurality of source driving ICs.

The gate driving circuit 130 sequentially drives the plurality of gate lines GL by sequentially supplying a scan signal to the plurality of gate lines GL.

The liquid crystal display panel 110 includes a thin film transistor array substrate including a thin film transistor, a color filter array substrate including a color filter and/or a black matrix, and a liquid crystal layer formed therebetween.

As described with reference to FIG. 1 , the liquid crystal display panel 110 according to the present invention includes a plurality of gate lines GL and a plurality of data lines DL that cross each other.

The plurality of gate lines GL and the plurality of data lines DL may be disposed in various ways.

In a recent liquid crystal display panel, in order to reduce the cost of the driving circuit of the liquid crystal display, instead of doubling the number of gate lines compared to the conventional one, the number of data lines is reduced by 1/2, so that the data driving circuit 120 is driven. A double rate driving (DRD) type liquid crystal display panel in which the number of ICs is reduced is being developed.

That is, a plurality of sub-pixels are arranged between the odd-numbered gate line and the even-numbered gate lines, the sub-pixels are not arranged between the even-numbered gate line and the odd-numbered gate lines, and one data line has a horizontal direction. Two sub-pixels adjacent to each other are connected to each other, and two sub-pixels connected to the one data line and horizontally adjacent are driven by different gate lines.

In addition, each sub-pixel has a thin film transistor (TFT) having a gate electrode connected to the gate line GL, a source electrode connected to the data line DL, and a drain electrode connected to the pixel electrode of the sub-pixel. includes

The configuration of the thin film transistor (TFT) and the pixel electrode will be described in more detail as follows.

The liquid crystal display panel according to the embodiment of the present invention can be applied to the liquid crystal display panel having the DRD structure as described above, and has a structure in which sub-pixels are arranged at the intersection of each gate line and each data line. The display panel is also free.

In addition, in the configuration of the sub-pixels of the liquid crystal display panel according to the embodiment of the present invention, since the liquid crystal display panel having the 1-sub-pixel 1-domain structure has only one domain in the sub-pixel, color shift in the diagonal direction ) problem and a gray inversion problem, a liquid crystal display panel having a 1 sub-pixel 2 domain structure may be applied. That is, since the pixel electrode and the data line are provided with bent portions, one sub-pixel constitutes two domains.

2 is a block diagram of a sub-pixel of the liquid crystal display panel according to the first embodiment of the present invention.

FIG. 2 illustrates a sub-pixel having a 1 sub-pixel 2 domain structure in a liquid crystal display panel having a DRD structure and in a TN (Twisted Nematic) mode.

As shown in FIG. 2 , in the sub-pixel of the liquid crystal display panel according to the first embodiment of the present invention, a plurality of sub-pixels are arranged between the first gate line GL1 and the second gate line GL2 . and two sub-pixels adjacent to each other in the horizontal direction are connected to one data line.

A thin film transistor having a gate electrode 11 , a source electrode 12 , and a drain electrode 13 is disposed in each sub-pixel region where each of the gate lines GL1 and GL2 and the data line DL intersect.

A pixel electrode 14 electrically connected to the drain electrode 13 of the thin film transistor is disposed in each sub-pixel region.

Here, in order to obtain the one sub-pixel two domain structure as described above, the pixel electrode 14 and the data line DL are provided with bent portions.

Meanwhile, FIG. 3 is a block diagram of a sub-pixel of a liquid crystal display panel according to a second exemplary embodiment of the present invention.

FIG. 3 illustrates sub-pixels having a 1-sub-pixel 2-domain structure in an IPS (In Plane Switching) mode liquid crystal display panel having a general structure rather than a DRD structure.

As shown in FIG. 3 , in the sub-pixels of the liquid crystal display panel according to the second exemplary embodiment of the present invention, gate lines GL1 and GL2 lines are arranged in a first direction, and a second sub-pixel perpendicular to the first direction is provided. The data lines DL are arranged in the direction, and the common lines CL are arranged in a direction parallel to the gate lines GL1 and GL2 in the first direction.

In addition, in each sub-pixel area, a thin film transistor T is formed at the intersection of each of the gate lines GL1 and GL2 and each of the data lines DL. In addition, in each sub-pixel region, a plurality of common electrodes 21 are branched from the common line CL in the second direction, and are electrically connected to the drain electrode of the thin film transistor T to make the common electrode 21 . A plurality of pixel electrodes 22 are formed therebetween in the second direction.

Similarly, in order to obtain the one-sub-pixel two-domain structure as described above, the common electrode 21 , the pixel electrode 22 and the data line DL have bent portions.

2 and 3 show the liquid crystal display panel in TN mode and IPS mode, but is not limited thereto, and the present invention can be applied to various liquid crystal display panels such as VA (Vertically Aligned) mode and FFS (Fringe Field Switching) mode. have.

4 is a diagram illustrating a release liquid crystal display panel according to an exemplary embodiment of the present invention, and FIG. 5 is an enlarged view of an edge portion of the release liquid crystal display panel of FIG. 4 according to an exemplary embodiment of the present invention.

In FIG. 4, the display area A/A of the heteromorphic (circular) liquid crystal display panel is shown. 4 and 5 , the display area A/A of the heterogeneous liquid crystal display panel is formed in a circular shape, and rectangular unit pixels UP are arranged in a matrix form in each display area.

Accordingly, the unit pixels UP of the edge portion of the display area A/A of the heterogeneous (circular) liquid crystal display panel are not completely located inside the display area A/A of the heterogeneous (circular) liquid crystal display panel. Instead, only a predetermined portion of the unit pixels UP may be located inside the display area A/A of the irregular (circular) liquid crystal display panel.

As shown in FIG. 5 , the heteromorphic liquid crystal display panel according to the embodiment of the present invention is divided into a display area A/A and a bezel area, and is positioned inside the display area A/A. Among the unit pixels UP, an open ratio by the black matrix BM is differentially applied to unit pixels disposed at an edge portion according to a location and an area disposed in the display area.

As described with reference to FIG. 1 , in the liquid crystal display panel 110 , a plurality of data lines DL and a plurality of gate lines GL are intersected to define a plurality of sub-pixels SP. In addition, a thin film transistor and a pixel electrode are arranged in each sub-pixel. The thin film transistor is controlled according to a gate signal (scan signal) applied through each gate line GL to supply a data voltage applied through each data line DL to the pixel electrode.

In such an arrangement, a black matrix is generally formed to cover the plurality of data lines DL, the plurality of gate lines GL, and the thin film transistor.

However, in the present invention, the black matrix BM includes the plurality of data lines DL, the plurality of gate lines GL and In addition to the thin film transistor, the pixel electrodes are arranged to further cover a portion of the unit pixels to be formed so that an open ratio of the unit pixels is differentially applied.

That is, the first unit pixels 1 located at the edge and having a small area located in the display area have a relatively low open ratio, and second unit pixels located at the edge but having a relatively large area located in the display area. (2) has a relatively higher open ratio than the first unit pixel, and the third unit pixels 3, which are located at the edge but have a complete area located in the display area, have a relatively higher open ratio than the second unit pixel, , the fourth unit pixels 4 positioned in the center of the display area far from the edge have the highest open ratio.

For example, assuming that the open ratio of the fourth unit pixels 4 is 100%, the first unit pixels 1 have an open ratio of 10% to 30%, and the second unit pixels 2 have an open ratio of 10% to 30%. has an open ratio of 40% to 60%, and a unit in which the black matrix BM is disposed at the edge of the heteromorphic liquid crystal display panel so that the third unit pixels 3 have an open ratio of 70% to 90% covers the pixels.

Each of the above-mentioned open ratios is not limited thereto, and the unit pixels located at the edge of the heterogeneous liquid crystal display panel are divided into three or more according to the area located in the display area, and open with various values for each divided unit pixel. You can adjust the ratio.

In addition, in the method in which the black matrix covers unit pixels disposed at the edge of the heteromorphic liquid crystal display panel, the central portion of each sub-pixel is exposed.

That is, assuming that the open ratio of the fourth unit pixels 4 is 100% based on the gate lines, data lines, and thin film transistors, the first unit pixels 1 have an open rate of 10% to 30%. covered by the black matrix BM to have a ratio, the second unit pixels 2 are covered by the black matrix BM to have an open ratio of 40% to 60%, and the third unit pixels 3 is covered by the black matrix (BM) to have an open ratio of 70% to 90%.

As such, the open ratio ( ) by the black matrix BM according to the position of the unit pixels disposed at the edge among the unit pixels UP positioned inside the display area A/A and the area positioned in the display area. Open ratio) is applied differentially, so even if the edges of various types of liquid crystal display panels, such as round, corner cut, curved, etc., are covered by the black matrix in a stepped shape, the curved surface of the edge of the heterogeneous liquid crystal display panel is displayed smoothly.

6A is a plan view of a pixel having an open ratio of 10% to 30% of the heteromorphic liquid crystal display panel according to the present invention, and FIG. 6B is a pixel having an open ratio of 10% to 30% of the heteromorphic liquid crystal display panel according to the present invention. is a cross section of

7A is a plan view of a pixel having an open ratio of 40% to 60% of the heteromorphic liquid crystal display panel according to the present invention, and FIG. 7B is a pixel having an open ratio of 40% to 60% of the heteromorphic liquid crystal display panel according to the present invention. is a cross section of

8A is a plan view of a pixel having an open ratio of 70% to 90% of the heteromorphic liquid crystal display panel according to the present invention, and FIG. 8B is a pixel having an open ratio of 70% to 90% of the heteromorphic liquid crystal display panel according to the present invention. is a cross section of

6A to 8B, as described with reference to FIGS. 2 and 3, the common electrode, the pixel electrode, and the data line are arranged at the edge of the curved liquid crystal display panel to obtain a one-sub-pixel two-domain structure. The open ratio by the black matrix is applied differentially according to the position of the sub-pixel.

As described above, in the liquid crystal display panel having the 1-sub-pixel 2-domain structure, the image quality is improved by solving the problems of color shift and gray inversion in the diagonal direction, but the transmittance of the panel is reduced due to the occurrence of a foreground line at the domain boundary. There were downsides.

According to the present invention, as shown in FIGS. 6A, 7A, and 8A, among the unit pixels UP positioned inside the display area A/A, the unit pixels disposed at the edge are positioned and positioned in the display area. The open ratio by the black matrix BM is differentially applied according to the area where it is located, and the black matrix BM is characterized in that the domain boundary of the sub-pixel having a 1-sub-pixel 2 domain structure is blocked from light.

Accordingly, it is possible to prevent a decrease in transmittance at a domain boundary portion of each sub-pixel of the liquid crystal display panel having a 1-sub-pixel 2-domain structure and prevent a color difference from occurring.

The cross-sectional structure of the pixel of the heteromorphic liquid crystal display panel of the IPS mode according to the present invention is as shown in FIGS. 6B, 7B and 8B, a gate line (not shown in the drawing, FIG. 3) on the lower substrate SUB1. of GL1 and GL2) and a gate electrode G are formed, and a gate insulating layer GI may be formed on the entire surface of the lower substrate SUB1 including the gate line and the gate electrode G.

A semiconductor layer ACT is formed on a portion of the gate insulating layer GI that overlaps with the gate electrode G, and a source electrode S is formed on one side of the semiconductor layer ACT, and a drain electrode S is formed on the other side of the semiconductor layer ACT. D) may be formed to form a thin film transistor. The source electrode S is formed to protrude from the data line DL (refer to FIG. 3 ).

A passivation layer PAS may be formed on the entire surface of the lower substrate SUB1 including the thin film transistor, and the passivation layer PAS may be selectively removed to expose the drain electrode D to form a contact hole.

A pixel electrode PXL is formed on the passivation layer PAS to be electrically connected to the drain electrode D through the contact hole, and a common electrode COM is formed between the pixel electrodes PXL to form a horizontal arranged to form an electric field (see FIG. 3 ). As shown in FIG. 3 , the common electrode COM is branched from the common line CL in a second direction (a direction parallel to the data line).

Black matrices BM1 and BM2 may be disposed at the gate line GL, the data line DL, the thin film transistor, and the domain boundary portion of the upper substrate SUB2 . That is, a first black matrix BM1 may be formed on portions corresponding to the gate line GL, the data line DL, and the thin film transistor, and a second black matrix BM2 may be disposed on the domain boundary portion. have.

A color filter layer CF may be disposed in a sub-pixel area between the first and second black matrices BM1 and BM2 . The color filter layer CF has an arrangement of red (R), green (G) and blue (B) color filters according to the arrangement of sub-pixels, or has red (R), green (G), and blue (B) color filters. and an arrangement of white (w) color filters.

In addition, an upper alignment layer ALG2 may be formed on the entire surface of the upper substrate SUB2 including the first and second black matrices BM1 and BM2 and the color filter layer CF.

The upper substrate SUB2 and the lower substrate SUB1 configured as described above are bonded to have a predetermined space so that the upper alignment layer ARG2 and the lower alignment layer ARG1 face each other, and the bonded upper substrate SUB2 is formed. and a liquid crystal layer LC between the lower substrate SUB1 and the lower substrate SUB1.

In this case, the regions in which the first and second black matrices BM1 and BM2 are formed are different according to the positions of the sub-pixels.

That is, as described with reference to FIGS. 4 and 5 , among the unit pixels UP positioned inside the display area A/A, the unit pixels disposed at the edge are first And there is a difference in the open ratio by the second black matrix (BM1, BM2).

Accordingly, as in FIGS. 6A and 6B , the first unit pixels 1 illustrated in FIG. 5 have relatively the lowest open ratio by the first and second black matrices BM1 and BM2 (10%). to 30%), in the second unit pixels 2 shown in FIG. 5 , the open ratio by the first and second black matrices BM1 and BM2 is the second as shown in FIGS. 7A and 7B . Relatively higher (40% to 60%) than one unit pixel ( FIGS. 6A and 6B ), and the third unit pixels 3 shown in FIG. 5 , as in FIGS. 8A and 8B , the first and second units The open ratio by the 2 black matrices BM1 and BM2 has a relatively higher open ratio (70% to 90%) than that of the second unit pixel ( FIGS. 7A and 7B ).

6B, 7B and 8B, which are cross-sectional structures, the widths of the first and second black matrices BM1 and BM2 are the widest in the first unit pixels 1, and the widths of the second unit pixels 2 are the largest. In , the widths of the first and second black matrices BM1 and BM2 are narrower than in the first unit pixels 1 , and the first and second black matrices BM1 and BM2 in the third unit pixels 3 . ) is formed to be narrower than in the third unit pixels 2 .

Here, the open ratio may be adjusted by adjusting the width of the first black matrix and the width of the second black matrix, respectively.

The width of the first black matrix may be maintained the same, and the open ratio may be adjusted by adjusting the width of the second black matrix.

Conversely, the open ratio may be adjusted by maintaining the same width of the second black matrix and adjusting the width of the first black matrix.

As described above, in the present invention, in a heteromorphic liquid crystal display panel having a 1-sub-pixel 2-domain structure, an open ratio by a black matrix is differentially applied according to a position of a sub-pixel disposed at an edge portion, and in particular, a domain boundary portion Since the light is blocked by the black matrix, it is possible to prevent a decrease in transmittance at the domain boundary of each sub-pixel and also to prevent a color difference. In addition, since there is no need to apply a round algorithm of the data driving IC, power consumption can be reduced.

In addition, although a liquid crystal display panel having a 1-sub-pixel 2-domain structure has been described as an example, the present invention is not limited thereto, and it can be sufficiently applied to a liquid crystal display panel having a 1-sub-pixel 1-domain structure.

That is, in the case of a liquid crystal display panel having a one-sub-pixel one domain structure, the black matrix includes the plurality of gate lines; An open ratio may be differentially applied by increasing or decreasing an area covering a pixel area based on the plurality of data lines and thin film transistors.

In the case of a liquid crystal display panel having a one sub-pixel one domain structure, the second black matrix BM2 is not formed, only the first black matrix BM1 is formed, and the black matrix includes the plurality of gate lines and the plurality of data lines. and by increasing or decreasing an area covering the pixel area with the thin film transistors as the center, an open ratio may be differentially applied to unit pixels disposed at the edge of the display area according to a location and an area positioned in the display area.

Those skilled in the art from the above description will be able to see that various changes and modifications can be made without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

A/A: display area BM1, BM2: Black Matrix

Claims (10)

a first substrate divided into a display area and a non-display area, wherein a plurality of gate lines and a plurality of data lines are disposed in the display area to define a plurality of sub-pixel areas;
a thin film transistor and a pixel electrode disposed in each sub-pixel region; and
a black matrix disposed on a second substrate opposite to the first substrate to cover the plurality of gate lines, the plurality of data lines, and thin film transistors;
The unit pixels disposed at the edge of the display area have different areas covered by the black matrix according to positions and areas located in the display area, so that an open ratio is differentially applied. The method of claim 1,
The unit pixels to which the open ratio is differentially applied are divided into at least three open ratios of the heteromorphic liquid crystal display panel. 3. The method of claim 2,
The first unit pixels positioned at the edge and having a small area in the display area have a relatively low open ratio;
Second unit pixels located at the edge but located in the display area having a relatively larger area than the first unit pixels have a relatively higher open ratio than the first unit pixels,
Third unit pixels located at the edge but having a larger area than the second unit pixels in the display area have a relatively higher open ratio than the second unit pixels. 4. The method of claim 3
Assuming an open ratio of unit pixels positioned in the center of the display area with respect to gate lines, data lines, and thin film transistors to be 100%, the first unit pixels have an open ratio of 10% to 30%. covered by a black matrix, the second unit pixels are covered by the black matrix to have an open ratio of 40% to 60%, and the third unit pixels are covered by the black matrix to have an open ratio of 70% to 90% A release liquid crystal display panel covered by 2. The method of claim 1
Each unit pixel has a 1 sub-pixel 2 domain structure, and the black matrix blocks a domain boundary of each sub-pixel from light. 6. The method of claim 5,
In the black matrix, a first black matrix is disposed on a portion corresponding to a gate line, a data line, and a thin film transistor, and a second black matrix is disposed on a domain boundary portion;
the widths of the first and second black matrices are the widest in the first unit pixels;
Widths of the first and second black matrices in the second unit pixels are narrower than in the first unit pixels,
and wherein widths of the first and second black matrices in the third unit pixels are narrower than in the second unit pixels. 7. The method of claim 6
A heteromorphic liquid crystal display panel for controlling an open ratio by adjusting a width of the first black matrix and a width of the second black matrix, respectively. 7. The method of claim 6
A heteromorphic liquid crystal display panel that maintains the same width of the first black matrix and adjusts an open ratio by adjusting the width of the second black matrix. 7. The method of claim 6
A heteromorphic liquid crystal display panel that maintains the same width of the second black matrix and adjusts an open ratio by adjusting the width of the first black matrix. The method of claim 1,
Each unit pixel has a 1 sub-pixel 1 domain structure, and the black matrix includes the plurality of gate lines and the plurality of data according to positions of unit pixels disposed at the edge of the display area and an area located in the display area. A heterogeneous liquid crystal display panel in which an open ratio is differentially applied by increasing or decreasing an area covering a pixel area based on lines and thin film transistors.

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