CN100403102C - Multi-domain vertical alignment liquid crystal display panel - Google Patents

Abstract

The invention provides a multi-area vertical alignment (MVA) liquid crystal display panel, which comprises an upper substrate, a lower substrate, a conducting layer arranged between the upper substrate and the lower substrate, a liquid crystal molecular layer filled between the conducting layer and the lower substrate, a plurality of first alignment protrusions (protrus) and second alignment protrusions respectively arranged on the surface of the conducting layer facing the lower substrate and the surface of the lower substrate facing the upper substrate, and a plurality of shading patterns arranged at the positions of the surface of the upper substrate facing the lower substrate corresponding to the first alignment protrusions and used for shading light leakage at the edges of the first alignment protrusions.

Description

Multi-area Vertically Aligned Liquid Crystal Display Panel

technical field

The invention relates to a multi-domain vertical alignment (MVA) liquid crystal display panel, in particular to a multi-domain vertical alignment liquid crystal display capable of avoiding light leakage at the edge of alignment protrusions plate.

Background technique

Liquid crystal displays have been widely used in various electronic products, such as mobile phones, personal digital assistants (PDAs) and notebook computers (notebooks), and with the rapid development of the large-size flat-panel display market, liquid crystal Display plays a very important role, and gradually replaces cathode ray tube (CRT) display to become the mainstream of the market. However, the limited viewing angle of the liquid crystal display has become a limiting condition for development. Therefore, a multi-area vertically aligned liquid crystal display panel that can increase the viewing angle has emerged as the times require.

Please refer to FIG. 1 . FIG. 1 is a schematic cross-sectional view of a multi-area vertically aligned liquid crystal display panel 10 in the prior art. As shown in FIG. 1 , the prior art multi-area vertically aligned liquid crystal display panel 10 includes an upper substrate 12, a lower substrate 14, a liquid crystal molecular layer 16 filled between the upper substrate 12 and the lower substrate 14, and a liquid crystal molecule layer 16 disposed on the upper substrate. 12 a color filter layer 18 on the surface facing the lower substrate 14, a transparent conductive layer 20 disposed between the color filter layer 18 and the lower substrate 14, and a transparent conductive layer 20 disposed on the surface facing the lower substrate 14 There is a first arrangement of protrusions 22 on the surface of the lower substrate 14 and a second arrangement of protrusions 24 on the surface of the lower substrate 14 facing the upper substrate 12 . Wherein, the color filter layer 18 includes a plurality of red, green and blue filters for filtering light so that the liquid crystal display panel produces vivid colors, and each filter corresponds to a sub-section of the liquid crystal display panel. Pixel (sub pixel) area.

In addition, the multi-area vertically aligned liquid crystal display panel 10 of the prior art further includes a plurality of black matrices (black matrix) 26, which are arranged between any two color filters of different colors, and are used to prevent each sub-pixel region from The light is incident to adjacent sub-pixel regions, so as to improve the color contrast of the multi-region vertically aligned liquid crystal display panel 10 . The first alignment protrusions 22 and the second alignment protrusions 24 arranged in the multi-area vertical alignment liquid crystal display panel 10 are used to divide the same sub-pixel area into several areas, and make the liquid crystal in each area The molecules are arranged and rotated in different specific directions to effectively increase the viewing angle of the multi-area vertically aligned liquid crystal display panel 10 .

As mentioned above, although the multi-area vertically aligned liquid crystal display panel in the prior art has a wide viewing angle, due to the alignment protrusions, some liquid crystal molecules will rotate slightly without applying a voltage, especially those located on the alignment protrusions. The liquid crystal molecules near the object will cause light leakage on the liquid crystal display panel and reduce the contrast of the liquid crystal display, thereby affecting the display effect of the liquid crystal display. For example, when a certain pixel area needs to display a complete black, theoretically the red, green and blue sub-pixels in the pixel area should be in a completely dark state, but when light leakage occurs, the ideal complete black cannot be displayed. This results in poor contrast. Or when the color displayed in a certain pixel area only needs to use a combination of red and green, the light leakage in the blue sub-pixel area will cause the pixel area to fail to display the required color, thereby affecting the display effect of the liquid crystal display.

Contents of the invention

Therefore, an object of the present invention is to provide a multi-domain vertical alignment (MVA) liquid crystal display panel with a light-shielding pattern, so as to avoid the above-mentioned disadvantages of the prior art.

To achieve the above purpose, the present invention discloses a multi-region vertically aligned liquid crystal display panel, which includes an upper substrate, a lower substrate, a color filter layer arranged on the surface of the upper substrate facing the lower substrate, and a A conductive layer on the surface of the color filter layer facing the lower substrate, a layer of liquid crystal molecules filled between the conductive layer and the lower substrate, and a multilayer layer arranged on the surface of the conductive layer facing the lower substrate a first alignment protrusion, a plurality of second alignment protrusions arranged on the surface of the lower substrate facing the upper substrate to align the liquid crystal molecules in the liquid crystal molecular layer in a specific direction, And a plurality of light-shielding patterns, the plurality of light-shielding patterns are located between the upper substrate and the color filter layer, and correspond to the positions of the plurality of first arrangement of protrusions, and are used to shield the plurality of first arrangement of protrusions light leakage at the edge of the object.

Since the multi-area vertically aligned liquid crystal display panel of the present invention uses a plurality of light-shielding patterns to shield the light leakage at the edge of the alignment protrusions, it can effectively improve the shortcomings of the prior art. In addition, since the light-shielding pattern is arranged above the first alignment protrusions, it will not affect the light transmittance of the liquid crystal display.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the drawings are only for reference and auxiliary description, and do not constitute a limitation to the present invention.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a multi-area vertically aligned liquid crystal display panel in the prior art.

FIG. 2 is a schematic cross-sectional view of a multi-area vertically aligned liquid crystal display panel of the present invention.

FIG. 3 is a schematic cross-sectional view of a multi-area vertical alignment liquid crystal display panel according to another embodiment of the present invention.

Explanation of reference signs:

10 Multi-area vertical alignment liquid crystal 12 Upper substrate

display board

14 Lower Substrate 16 Liquid Crystal Molecular Layer

18 Color filter layer 20 Transparent conductive layer

22 The first row of protrusions 24 The second row of protrusions

26 Black matrix 50 Multi-area vertical alignment liquid crystal

display board

52 upper substrate 54 lower substrate

56 Liquid crystal molecule layer 58 Color filter layer

60 Conductive layer 62 The first row of protrusions

64 Second row of protrusions 66 Shading pattern

68 sub-pixel area 70 sub-pixel area

72 Sub-pixel area 74 Black matrix

76 transparent electrode layer

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a preferred embodiment of a multi-area vertical alignment liquid crystal display panel 50 of the present invention. As shown in FIG. 2 , the multi-area vertically aligned liquid crystal display panel 50 includes an upper substrate 52, a lower substrate 54, a liquid crystal molecule layer 56 filled between the upper substrate 52 and the lower substrate 54, and the upper substrate 52 faces downward. A color filter layer 58 on the surface of the substrate 54, a conductive layer 60 disposed on the surface of the color filter layer 58 facing the lower substrate 54, and a conductive layer 60 disposed on the surface of the conductive layer 60 facing the lower substrate 54 A plurality of protrusions 62 in a first arrangement, and a plurality of protrusions 64 in a second arrangement are disposed on a surface of the lower substrate 54 facing the upper substrate 52 .

The color filter layer 58 includes a plurality of red, green and blue color filters, which are used to make the liquid crystal display panel produce vivid colors, and each filter corresponds to a sub-pixel (sub pixel) area of the liquid crystal display panel (Sub-pixel regions 68, 70 and 72 shown in FIG. 2). The first arrangement of protrusions 62 is arranged on the surface of the conductive layer 60 in the center of the corresponding sub-pixel region facing the lower substrate 54, and the second arrangement of protrusions 64 is arranged on any two adjacent sub-pixel regions facing the upper substrate 52. On the surface of the lower substrate 54, and each sub-pixel region is divided into at least two regions by means of the first alignment protrusions 62 and the second alignment protrusions 64, and the liquid crystal molecules in different areas are arranged in specific different directions with rotation. In addition, in order to shield light leakage from the edges of the first alignment protrusions 62, the multi-area vertical alignment liquid crystal display panel 50 of the present invention further includes light-shielding patterns 66 arranged between the color filter layer 58 and the upper substrate 52, and each light-shielding pattern 66 are all located directly above the corresponding protrusions 62 in the first arrangement, and the area of the light-shielding pattern 66 may be larger than the area of the corresponding protrusions 62 in the first arrangement. In addition, the multi-area vertically aligned liquid crystal display panel 50 also includes a plurality of black matrices 74, which are arranged between any two adjacent filters to prevent the light in each sub-pixel area from entering the adjacent sub-pixel area. To improve the color contrast of the multi-region vertically aligned liquid crystal display panel 50 .

As mentioned above, the multi-region vertically aligned liquid crystal display panel 50 of the present invention uses the first alignment protrusions 62 and the second alignment protrusions 64 to arrange the liquid crystal molecules in each sub-pixel area in specific different directions, so that the sub-pixels The region is divided into at least two regions, and since the liquid crystal molecules in different regions rotate at different angles, the viewing angle of the liquid crystal display panel can be increased. In addition, different from the prior art, the multi-area vertical alignment liquid crystal display panel 50 of the present invention is provided with a corresponding light-shielding pattern 66 directly above each first alignment protrusion 62, which is used to shield each The light leakage phenomenon caused by the edge of a first arrangement of protrusions 62, and each light-shielding pattern 66 is located directly above each first arrangement of protrusions 62, so the light transmittance of each sub-pixel area will not be affected. It is worth noting that since the light-shielding pattern 66 and the black matrix 66 of the present invention are both disposed between the upper substrate 52 and the color filter layer 58, they can be formed in the same black matrix manufacturing process to save cost. In addition, the number and arrangement of the first arrangement of protrusions 62 and the second arrangement of protrusions 64 can also be adjusted according to the number of regions required to be separated in the sub-pixel area or across several sub-pixel areas.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of another embodiment of a multi-area vertical alignment liquid crystal display panel 50 of the present invention. The difference from the preferred embodiment of the present invention is that the multi-area vertically aligned liquid crystal display panel 50 of this embodiment uses a COA (color filter on array) substrate. As shown in FIG. 3 , the multi-area vertically aligned liquid crystal display panel 50 includes an upper substrate 52, a lower substrate 54, a liquid crystal molecule layer 56 filled between the upper substrate 52 and the lower substrate 54, and the lower substrate 54 faces upward. A color filter layer 58 on the surface of the substrate 52, a conductive layer 60 disposed on the surface of the upper substrate 52 facing the lower substrate 54, a conductive layer 60 disposed on the surface of the color filter layer 58 facing the upper substrate 52 A transparent electrode layer 76, a plurality of first array protrusions 62 arranged on the surface of the conductive layer 60 facing the lower substrate 54, and a plurality of second arrays arranged on the surface of the transparent electrode layer 76 facing the upper substrate 52. Protrusions 64 are aligned.

The color filter layer 58 includes a plurality of red, green and blue filters, and each filter corresponds to a sub-pixel (sub pixel) area (sub-pixel areas 68, 70 and 72). The first arrangement of protrusions 62 is arranged at the position of two adjacent sub-pixel regions, and the second arrangement of protrusions 64 is arranged in the center of each sub-pixel region, and each sub-pixel region is arranged by means of the first arrangement of protrusions 62 and the second alignment protrusions 64 are divided into at least two areas, and the liquid crystal molecules located in different areas are arranged and rotated in specific different directions. As mentioned above, light leakage occurs at the edge of the first alignment protrusion 62, so the multi-area vertical alignment liquid crystal display panel 50 further includes a plurality of light-shielding patterns 66 disposed between the upper substrate 52 and the conductive layer 60, each light-shielding pattern 66 The positions of the protrusions 62 in the first arrangement correspond to the protrusions 62 in the first arrangement, and the area of the light-shielding pattern 66 may be larger than the area of the protrusions 62 in the first arrangement corresponding thereto. In addition, the multi-area vertically aligned liquid crystal display panel 50 of the present invention further includes a plurality of black matrices 74, which are arranged between any two adjacent filters to prevent the light in each sub-pixel area from entering the adjacent sub-pixel area. The pixel area is used to improve the color contrast of the multi-area vertically aligned liquid crystal display panel 50 .

Compared with the technology in the prior art, the multi-area vertical alignment liquid crystal display panel 50 of the present invention utilizes the light-shielding pattern arranged directly above the first alignment protrusions to shield the light leakage at the edge of the first alignment protrusions, so not only will it not Affecting the light transmittance of the liquid crystal display panel can effectively improve the contrast of the liquid crystal display panel and improve the technical shortcomings of the prior art.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the present invention shall fall within the coverage of the patent of the present invention.

Claims (9)

1. A multi-area vertically aligned liquid crystal display panel, said liquid crystal display panel comprising: One upper substrate; Look at the substrate; a conductive layer disposed between the upper substrate and the lower substrate; a layer of liquid crystal molecules, filled between the conductive layer and the lower substrate; A plurality of color filters are arranged between the upper substrate and the conductive layer, a black matrix is also arranged between any two adjacent color filters, and each color filter corresponding to a sub-pixel area; At least one first alignment protrusion is arranged on the conductive layer in the center of the corresponding sub-pixel area facing the bottom surface of the lower substrate, so as to arrange the liquid crystal molecules in the liquid crystal molecule layer in a specific direction ;as well as at least one light-shielding pattern, located on the bottom surface of the upper substrate facing the lower substrate, and corresponding to the position of the first arrangement of protrusions, for shielding the edges of the first arrangement of protrusions of light leaks. 2. The liquid crystal display panel as claimed in claim 1, wherein said color filters comprise a plurality of red filters, a plurality of green filters and a plurality of blue filters. 3. The liquid crystal display panel as claimed in claim 1, wherein the area of the light-shielding pattern is slightly larger than the area of the corresponding protrusions in the first arrangement. 4. The liquid crystal display panel as claimed in claim 1, further comprising a plurality of second alignment protrusions, which are arranged on the surface of the lower substrate facing the conductive layer, for making the liquid crystal molecules in the layer Liquid crystal molecules are aligned in a specific direction. 5. A multi-region vertically aligned liquid crystal display panel, comprising: One upper substrate; Look at the substrate; A layer of liquid crystal molecules, located between the upper substrate and the lower substrate; a plurality of black matrices, located on the surface of the upper substrate facing the lower substrate; A plurality of color filters are located below the black matrix; a conductive layer, located below the color filter; A plurality of first alignment protrusions, located on the surface of the conductive layer facing the lower substrate, are used to align the liquid crystal molecules in the liquid crystal molecule layer in a specific direction; and A plurality of light-shielding patterns are located on the same plane as the black matrix and correspond to the positions of the protrusions in the first arrangement, and are used to shield light leakage at the edges of the protrusions in the first arrangement. 6. The liquid crystal display panel as claimed in claim 5, wherein said color filters comprise a plurality of red filters, a plurality of green filters or a plurality of blue filters. 7. The liquid crystal display panel as claimed in claim 5, wherein said black matrix is located between any two adjacent color filters. 8. The liquid crystal display panel as claimed in claim 5, wherein the area of each of the light-shielding patterns is slightly larger than the area of each of the corresponding protrusions in the first arrangement. 9. The liquid crystal display panel as claimed in claim 5, wherein the surface of the lower substrate facing the electrical layer further comprises a plurality of second alignment protrusions for making the liquid crystal molecule layer Liquid crystal molecules are aligned in a specific direction.

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