TWI860119B - Vertical alignment liquid crystal display panel structure - Google Patents

Abstract

Disclosed is a vertical alignment liquid crystal display panel structure, which comprises an array substrate, a reflective layer, a liquid crystal layer, an upper substrate and a liquid crystal molecule control unit. A microstructure portion and a translucent flat portion are formed on the top of the array structure. The reflective layer is disposed on the microstructure portion. The liquid crystal layer is disposed on the reflective layer and the flat portion; the liquid crystal layer comprises a plurality of vertical alignment liquid crystal molecules. The upper substrate is disposed on the liquid crystal layer. The liquid crystal molecule control unit is disposed at the bottom of the upper substrate, so that the liquid crystal molecule control unit corresponds to the flat portion. The flat portion and the liquid crystal molecule control unit are used to control the tilting direction of the vertical alignment liquid crystal molecules. The purpose of improving the contrast ratio and visual angle of the penetration area of ​​the vertical alignment liquid crystal display may be achieved.

Description

Vertically aligned liquid crystal display panel structure

The present invention relates to a display panel structure, in particular to a vertically aligned liquid crystal display panel structure.

The panel structure of a known vertical alignment (VA) liquid crystal display includes an array substrate, a liquid crystal layer and an upper substrate. A microstructure portion is formed on the top of the array substrate, the liquid crystal layer is disposed above the microstructure portion, the liquid crystal layer includes a plurality of vertical alignment liquid crystal molecules, and the upper substrate is disposed above the microstructure portion. In the prior art, a reflective metal layer is disposed on the surface of the microstructure portion to form a reflective area, and a part of the reflective metal layer is removed to form a penetrating opening area, so that light from a backlight module disposed below the array substrate can penetrate.

However, in the prior art, the shape of the microstructure in the through-opening area will cause the tilting direction of the vertically aligned liquid crystal molecules in the through-opening area to be chaotic and irregular, resulting in a decrease in the contrast of the through-opening area of the VA liquid crystal display and a poor viewing angle.

Therefore, it is necessary to propose a better solution to solve the problem of reduced contrast and poor viewing angle of the penetration area of the VA liquid crystal display in the above-mentioned prior art.

In view of the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a vertically aligned liquid crystal display panel structure, which improves the structure of the panel structure and solves the problems of reduced contrast and poor viewing angle of the transmission area of the vertical alignment (VA) liquid crystal display.

To achieve the above-mentioned purpose, the main technical means adopted by the present invention is to make the aforementioned vertically aligned liquid crystal display panel structure include: An array substrate, a microstructure portion and a light-transmissive flat portion are formed on its top; A reflective layer, which is arranged on the microstructure portion; A liquid crystal layer, which is arranged above the microstructure portion and the flat portion, and the liquid crystal layer includes a plurality of vertically aligned liquid crystal molecules; An upper substrate, which is arranged above the liquid crystal layer; and A liquid crystal molecule control unit, which is arranged at the bottom of the upper substrate and corresponds to the position of the flat portion.

The present invention forms the light-transmissive flat portion on the top of the array substrate, and the liquid crystal molecule control unit is disposed at a corresponding position on the bottom of the upper substrate. The flat portion and the liquid crystal molecule control unit are used to control the tilting direction of the vertically aligned liquid crystal molecules, thereby achieving the purpose of improving the contrast and viewing angle of the penetration area of the vertically aligned liquid crystal display.

Regarding an embodiment of the vertically aligned liquid crystal display panel structure of the present invention, please refer to FIG. 1, which includes an array substrate 10, a reflective layer 20, a liquid crystal layer 30, an upper substrate 40 and a liquid crystal molecule control unit 50; a microstructure portion 11 and a light-transmissive flat portion 12 are formed on the top of the array substrate 10, and the microstructure portion 11 surrounds the flat portion 12; the reflective layer 20 is disposed on the microstructure portion 11, and the reflective layer 20 is disposed on the microstructure portion 11. 0 forms a reflective area, and the area formed by the flat portion 12 forms a transmissive area; the liquid crystal layer 30 is disposed above the microstructure portion 11 and the flat portion 12, and the liquid crystal layer 30 includes a plurality of vertically aligned liquid crystal molecules 31; the upper substrate 40 is disposed above the liquid crystal layer 30; the liquid crystal molecule control unit 50 is disposed at the bottom of the upper substrate 40 and corresponds to the position of the transmissive area of the flat portion 12.

Therefore, the present invention forms the flat portion 12 on the top of the array substrate 10, and the liquid crystal molecule control unit 50 is disposed on the bottom of the upper substrate 40, and the liquid crystal molecule control unit 50 corresponds to the flat portion 12. The flat portion 12 and the liquid crystal molecule control unit 50 are used to control the tilting direction of the vertically aligned liquid crystal molecules 31, which can improve the contrast ratio and viewing angle of the vertically aligned liquid crystal display in the penetration area.

Please refer to FIG. 2 . In this embodiment, the array substrate 10 includes a lower transparent substrate 16, an array layer 15, an isolation layer 13 and a lower transparent electrode layer 14. The array layer 15 is disposed on the lower transparent substrate 16, the isolation layer 13 is disposed on the array layer 15, and a photomask process is performed on the top surface of the isolation layer 13 to form the microstructure portion 11 and the flat portion 12 of the array substrate 10. Furthermore, the lower transparent electrode layer 14 is disposed on the microstructure portion 11 and the flat portion 12 of the array substrate 10 in a shape-matched manner, and the material used for the lower transparent electrode layer 14 can be indium tin oxide (ITO). In this embodiment, the lower transparent electrode layer 14 includes a light-transmitting layer 141, and the range and position of the light-transmitting layer 141 match the penetration area of the flat portion 12.

In this embodiment, the isolation layer 13 is disposed on the array layer 15. The function of the isolation layer 13 is to isolate the array layer 15 from the reflective layer 20 and the lower transparent electrode layer 14 to avoid signal interference. Usually, the array layer 15 includes a plurality of active elements, a plurality of gate lines and a plurality of data lines. The active elements are arranged in an array and are electrically connected to the gate lines and the data lines respectively. In this embodiment, the lower transparent substrate 16 can be made of a glass material to enhance the light transmission effect.

In addition, in a specific application of this embodiment, as shown in FIG. 2 , a backlight module 60 is further included. The backlight module 60 is disposed below the lower transparent substrate 16 . The backlight module 60 is used to provide light so that the present invention utilizes light for display.

In this embodiment, as still shown in FIG. 2 , the upper substrate 40 includes an upper transparent electrode layer 41, a filling layer 42, a filter layer 43 and an upper transparent substrate 44; the upper transparent electrode layer 41 is disposed above the liquid crystal layer 30, and the upper transparent electrode layer 41 constitutes the bottom of the upper substrate 40, the filling layer 42 is disposed above the upper transparent electrode layer 41, the filter layer 43 is disposed above the filling layer 42, the filling layer 42 is used to flatten the bottom of the filter layer 43, the upper transparent substrate 44 is disposed above the filter layer 43, and the upper transparent substrate 44 can be composed of a glass material to enhance the light transmission effect. In the present embodiment, the material used for the upper transparent electrode layer 41 includes indium tin oxide (ITO); in the present embodiment, the liquid crystal molecule control unit 50 is disposed on the lower surface of the upper transparent electrode layer 41, and the liquid crystal molecule control unit 50 is centered at a position corresponding to the penetration area of the flat portion 12. The liquid crystal molecule control unit 50 is composed of an arc-shaped convex portion, which can enhance the control effect.

Through the provision of the flat portion 12 and the liquid crystal molecule control unit 50, the arrangement of the vertically aligned liquid crystal molecules 31 within the transmission zone is not affected by the microstructure portion 11. The liquid crystal molecule control unit 50 and the flat portion 12 can control the tilting direction of the vertically aligned liquid crystal molecules 31 within the transmission zone, so that the vertically aligned liquid crystal molecules 31 within the transmission zone are arranged to diffuse outward uniformly with the liquid crystal molecule control unit 50 as the center, thereby improving the contrast and viewing angle of the transmission zone of the present invention.

To further illustrate the application of various shapes and forms of this embodiment, please refer to FIG. 3 , which is a first shape and form of this embodiment, the liquid crystal molecule control unit 50 has a radius distance a, the radius distance a is between 1 and 20 micrometers (μm), and the position of the liquid crystal molecule control unit 50 corresponding to the light-transmitting layer 141 is centered. In the present embodiment, the light-transmitting layer 141 is circular, the reflective layer 20 surrounds the light-transmitting layer 141, and there is a first distance s1 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the first distance s1 is between 2 and 150 μm. In the present embodiment, the radius a of the liquid crystal molecule control unit 50 and the first distance s1 constitute the radius of the light-transmitting layer 141.

Please refer to FIG. 4 . The second shape pattern in this embodiment is substantially the same in technical content as the first shape pattern (as shown in FIG. 3 ), but the main difference is that the light-transmitting layer 141 is in a square shape, and there is a second distance s2 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the second distance s2 is between 2 and 150 μm.

Please refer to FIG. 5 . The third shape pattern in this embodiment is substantially the same as the first shape pattern (as shown in FIG. 3 ) in terms of technical content, but the main difference is that a ring-shaped reflective layer 20′ is further provided in the light-transmitting layer 141. There is a third distance s3 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the third distance s3 is between 2 and 150 μm. In addition, there is a first distance b1 between the ring-shaped reflective layer 20′ and the reflective layer 20, and the first distance b1 is between 2 and 150 μm.

Please refer to FIG. 6 . The fourth shape pattern in this embodiment is substantially the same as the first shape pattern (as shown in FIG. 3 ) in terms of technical content, but the main difference is that a circular reflective layer 20'' is further provided in the light-transmitting layer 141. The light-transmitting layer 141 surrounds the circular reflective layer 20''. The liquid crystal molecule control unit 50 corresponds to the center position of the circular reflective layer 20''. In addition, there is a fourth distance s4 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20. The fourth distance s4 is between 2 and 150 μm. In addition, there is a second distance b2 between the circular reflective layer 20'' and the reflective layer 20. The second distance b2 is between 2 and 150 μm.

Please refer to Figure 7. Regarding the fifth shape pattern in this embodiment, its technical content is roughly the same as the second shape pattern (as shown in Figure 4), but the main difference is that the light-transmitting layer 141 further has the circular reflective layer 20'', and there is a fifth distance s5 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the fifth distance s5 is between 2 and 150μm.

Please refer to FIG8 . The sixth shape in this embodiment is substantially the same as the fifth shape (as shown in FIG7 ) in terms of technical content, except that the circular reflective layer 20'' in the light-transmitting layer 141 is further replaced by a square reflective layer 20'''. A sixth distance s6 is also provided from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the sixth distance s6 is between 2 and 150 μm. In addition, a third distance b3 is provided between the square reflective layer 20''' and the reflective layer 20, and the third distance b3 is between 2 and 150 μm.

Please refer to Figure 9. Regarding the seventh shape pattern in this embodiment, its technical content is roughly the same as the fourth shape pattern (as shown in Figure 6), but the main difference is that a plurality of connecting segments 201 are formed between the circular reflective layer 20'' and the reflective layer 20, and the connecting segments 201 are arranged at intervals, and there is also a seventh distance s7 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the seventh distance s7 is between 2 and 150μm.

Please refer to Figure 10. Regarding the eighth shape pattern in this embodiment, its technical content is roughly the same as the fifth shape pattern (as shown in Figure 8), but the main difference is that a plurality of connecting sections 201' are formed between the square reflective layer 20''' and the reflective layer 20, and there is an eighth distance s8 from the radius a of the liquid crystal molecule control unit 50 to the reflective layer 20, and the eighth distance s8 is between 2 and 150μm.

Please refer to FIG. 11 . The ninth shape pattern in this embodiment is substantially the same as the seventh shape pattern (as shown in FIG. 9 ) and the eighth shape pattern (as shown in FIG. 10 ) in terms of technical content. However, the main difference is that the shapes and sizes of the connecting sections 201 and 201 ′ are significantly different. In this embodiment, the connecting sections 201 and 201 ′ are further extended, so that the shape of the light-transmitting layer 141 is changed, and the light-transmitting layer 141 is formed into a plurality of long strips, and extends outward in a radial shape from the liquid crystal molecule control unit 50 as the center. There is a ninth distance s9 from the radius a of the liquid crystal molecule control unit 50 to the outermost end of the light-transmitting layer 141 in the horizontal direction, and the ninth distance s9 is between 2 and 150 μm. In addition, each strip of the light-transmitting layer 141 has a width w1, and the width w1 is between 2 and 150 μm.

In this embodiment, please refer to Figure 12, the liquid crystal molecule control unit 50 can be further arranged on the lower surface of the upper transparent electrode layer 41 and corresponds to the position of the microstructure part 11, and the lower transparent electrode layer 14 and the reflective layer 20 form a plurality of slits 142, and the slits 142 are respectively located between the adjacent liquid crystal molecule control units 50. The slits 142 will generate bent electric lines so that the vertically aligned liquid crystal molecules 31 adjacent to the slits 142 will be arranged along the direction of the slits 142 and tilted to both sides, thereby separating the vertically aligned liquid crystal molecules 31 between the adjacent liquid crystal molecule control units 50, and the liquid crystal molecule control units 50 will respectively control the range of the reflective area of the reflective layer 20 and the The tilting direction of the vertically aligned liquid crystal molecules 31 within the penetration area of the flat portion 12 causes the vertically aligned liquid crystal molecules 31 within the reflection area and the penetration area to be uniformly diffused outward with the liquid crystal molecule control unit 50 as the center, thereby producing a multi-domain alignment effect and further improving the viewing angle of the present invention.

10: array substrate 11: microstructure part 12: flat part 13: isolation layer 14: lower transparent electrode layer 141: light-transmitting layer 142: slit 15: array layer 16: lower transparent substrate 20: reflective layer 30: liquid crystal layer 31: vertically aligned liquid crystal molecules 40: upper substrate 41: upper transparent electrode layer 42: filling layer 43: filter layer 44: upper transparent substrate 50: liquid crystal molecule control unit 60: backlight module a: radius distance s1: first distance s2: second distance s3: third distance s4: fourth distance s5: fifth distance s6: sixth distance s7: seventh distance s8: eighth distance s9: ninth distance 20’: annular reflective layer 20’’: circular reflective layer 20’’’: square reflective layer 201: connecting section 201’: connecting section b1: first distance b2: second distance b3: third distance w1: width

FIG. 1 is a schematic diagram of an embodiment of the panel structure of the present invention. FIG. 2 is another schematic diagram of an embodiment of the panel structure of the present invention. FIG. 3 is a schematic diagram of a first state of an embodiment of the panel structure of the present invention. FIG. 4 is a schematic diagram of a second state of an embodiment of the panel structure of the present invention. FIG. 5 is a schematic diagram of a third state of an embodiment of the panel structure of the present invention. FIG. 6 is a schematic diagram of a fourth state of an embodiment of the panel structure of the present invention. FIG. 7 is a schematic diagram of a fifth state of an embodiment of the panel structure of the present invention. FIG. 8 is a schematic diagram of a sixth state of an embodiment of the panel structure of the present invention. FIG. 9 is a schematic diagram of a seventh state of an embodiment of the panel structure of the present invention. FIG. 10 is a schematic diagram of an eighth state of an embodiment of the panel structure of the present invention. FIG. 11 is a schematic diagram of the ninth embodiment of the panel structure of the present invention. FIG. 12 is another schematic diagram of the embodiment of the panel structure of the present invention.

10: Array substrate

11: Microstructure

12: Flat part

20: Reflective layer

30: Liquid crystal layer

31: Vertically aligned liquid crystal molecules

40: Upper substrate

50: Liquid crystal molecule control unit

Claims (14)

A vertically aligned liquid crystal display panel structure includes: an array substrate, a microstructure portion and a light-transmissive flat portion are formed on the top of the array substrate; a reflective layer is disposed on the microstructure portion; a liquid crystal layer is disposed above the microstructure portion and the flat portion, the liquid crystal layer includes a plurality of vertically aligned liquid crystal molecules; an upper substrate is disposed above the liquid crystal layer; and a liquid crystal molecule control unit is disposed on the upper substrate. The bottom of the microstructure portion corresponds to the position of the flat portion; wherein the array substrate includes: a lower transparent substrate; an array layer, which is arranged on the lower transparent substrate; an isolation layer, which is arranged on the array layer, and the top of the isolation layer forms the microstructure portion and the flat portion; and a lower transparent electrode layer, which is arranged on the microstructure portion and the flat portion, and the lower transparent electrode layer includes a light-transmitting layer, and the light-transmitting layer matches the flat portion. A vertically aligned liquid crystal display panel structure as described in claim 1, wherein the position of the liquid crystal molecule control unit corresponding to the flat portion is centered. In the vertically aligned liquid crystal display panel structure described in claim 1, the light-transmitting layer is in a circular or square shape. The vertically aligned liquid crystal display panel structure as described in claim 3, wherein when the light-transmitting layer is in the circular shape, the reflective layer surrounds the light-transmitting layer, and there is a first distance from the liquid crystal molecule control unit to the reflective layer. The vertically aligned liquid crystal display panel structure as described in claim 4, wherein the light-transmitting layer further comprises an annular reflective layer, a third distance exists between the liquid crystal molecule control unit and the reflective layer, and a first distance exists between the annular reflective layer and the reflective layer. The vertically aligned liquid crystal display panel structure as described in claim 4, wherein the light-transmitting layer further has a circular reflective layer, the light-transmitting layer surrounds the circular reflective layer, the liquid crystal molecule control unit corresponds to the center position of the circular reflective layer, and there is a fourth distance from the liquid crystal molecule control unit to the reflective layer, and there is a second distance between the circular reflective layer and the reflective layer. A vertically aligned liquid crystal display panel structure as described in claim 6, wherein a plurality of connecting segments are formed between the circular reflective layer and the reflective layer, and a seventh distance exists from the liquid crystal molecule control unit to the reflective layer. The vertically aligned liquid crystal display panel structure as described in claim 3, wherein the light-transmitting layer is in the square shape, and there is a second distance from the liquid crystal molecule control unit to the reflective layer. A vertically aligned liquid crystal display panel structure as described in claim 8, wherein the light-transmitting layer further comprises a circular reflective layer, and a fifth distance exists between the liquid crystal molecule control unit and the reflective layer. The vertically aligned liquid crystal display panel structure as described in claim 8, wherein the circular reflective layer in the light-transmitting layer is further replaced by a square reflective layer, a sixth distance is provided from the liquid crystal molecule control unit to the reflective layer, and a third distance is provided between the square reflective layer and the reflective layer. A vertically aligned liquid crystal display panel structure as described in claim 10, wherein a plurality of connecting segments are formed between the square reflective layer and the reflective layer, and there is an eighth distance from the liquid crystal molecule control unit to the reflective layer. A vertically aligned liquid crystal display panel structure as described in claim 7 or 11, wherein the connecting sections are further extended so that the light-transmitting layer forms a plurality of long strips, and there is a ninth distance from the liquid crystal molecule control unit to the light-transmitting layer. The vertically aligned liquid crystal display panel structure as described in claim 1, wherein the upper substrate comprises: an upper transparent electrode layer, which is disposed on the liquid crystal layer, the upper transparent electrode layer constitutes the bottom of the upper substrate, and the liquid crystal molecule control unit is disposed on the lower surface of the upper transparent electrode layer; a filling layer, which is disposed on the upper transparent electrode layer; a filter layer, which is disposed on the filling layer; and an upper transparent substrate, which is disposed on the filter layer. The vertically aligned liquid crystal display panel structure as described in claim 13, wherein the liquid crystal molecule control unit is further arranged on the lower surface of the upper transparent electrode layer and corresponds to the position of the microstructure portion, and the lower transparent electrode layer and the reflective layer are formed with a plurality of slits, and the slits are respectively located between the adjacent liquid crystal molecule control units.