VA segment code liquid crystal display without visual angle blind area

Abstract

The utility model provides a VA segment code liquid crystal display without a visual angle blind area, the VA segment code liquid crystal display without the visual angle blind area comprises an upper polaroid, a lower polaroid and a liquid crystal box, the upper polaroid is arranged on the liquid crystal box, and the lower polaroid is arranged below the liquid crystal box; the liquid crystal box is provided with an upper glass substrate, an upper ITO electrode layer, an upper PI layer, a liquid crystal layer, a lower PI layer, a lower ITO electrode layer and a lower glass substrate from top to bottom; the upper ITO electrode layer is provided with a plurality of first square hollowed-out parts in an array mode in the first direction and the second direction, and the lower ITO electrode layer is provided with a plurality of second square hollowed-out parts in an array mode in the first direction and the second direction. The first direction is perpendicular to the second direction, and the first square hollowed-out parts of the upper ITO electrode layer and the second square hollowed-out parts of the lower ITO electrode layer are arranged in a staggered mode. According to the VA segment code liquid crystal display without the visual angle blind area, the color difference in the side direction can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display, and in particular relates to a VA segment code liquid crystal display without a viewing angle blind zone. Background Art

[0002] Indium tin oxide (ITO) is an n-type semiconductor material. Due to its outstanding electrical conductivity, visible light transmittance, and mechanical hardness, it is often used as an electrode material in various products, such as the upper and lower electrodes of the display area of ​​vertical alignment passive segment liquid crystal (VA) displays.

[0003] When traditional vertically aligned passive segmented liquid crystal displays are powered on, the negative liquid crystal molecules will tilt, creating a viewing blind spot of about 15° in the direction of the long axis of the liquid crystal molecules in the opposite direction of the viewing angle. To solve this viewing blind spot problem, stripe cross-hatching is currently used to produce a two-domain orientation in one visual direction. However, due to the domainless orientation in the lateral direction, color difference will occur, thus affecting the display effect of the liquid crystal device. Utility Model Content

[0004] In order to overcome the defects in the prior art, an embodiment of the present invention provides a VA segment code liquid crystal display without a viewing angle blind zone, which is used to solve the above problems.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a VA segment code liquid crystal display without a viewing angle blind zone, the VA segment code liquid crystal display without a viewing angle blind zone comprises an upper polarizer, a lower polarizer and a liquid crystal box, the upper polarizer is arranged on the liquid crystal box, and the lower polarizer is arranged under the liquid crystal box; the liquid crystal box is provided with an upper glass substrate, an upper ITO electrode layer, an upper PI layer, a liquid crystal layer, a lower PI layer, a lower ITO electrode layer and a lower glass substrate from top to bottom; wherein,

[0007] The upper ITO electrode layer is provided with a plurality of first square hollows in an array along the first direction and the second direction, and the lower ITO electrode layer is provided with a plurality of second square hollows in an array along the first direction and the second direction; the first direction and the second direction are perpendicular, and the first square hollows of the upper ITO electrode layer are staggered with the second square hollows of the lower ITO electrode layer.

[0008] As a further description of the above technical solution, the side lengths of the first square hollow and the second square hollow are both between 10 μm and 12 μm.

[0009] As a further description of the above technical solution, in the first direction and the second direction, the intervals between two adjacent first square hollows are both between 100 μm and 120 μm.

[0010] As a further description of the above technical solution, in the first direction and the second direction, the intervals between two adjacent second square hollows are both between 100 μm and 120 μm.

[0011] As a further description of the above technical solution, the thickness of the liquid crystal cell is between 3 μm and 4 μm;

[0012] The Δnd of the liquid crystal cell is between 0.275 and 0.300.

[0013] As a further description of the above technical solution, the liquid crystal layer does not rub the upper PI layer and the lower PI layer.

[0014] By means of the above technical solutions, the outstanding effects of the present invention are:

[0015] When the VA segment code liquid crystal display with no viewing angle blind zone provided by the present invention is not powered on, the arrangement of the liquid crystal molecules in its liquid crystal layer is similar to that of a traditional vertically aligned passive segment code liquid crystal display; after power is applied, the first square hollowing and the second square hollowing will cause the upper ITO electrode layer and the lower ITO electrode layer to generate an inclined electric field. Under the action of the inclined electric field, the liquid crystal molecules generate four-domain orientation in mutually perpendicular directions within the pixels recognizable by the human eye, thereby effectively reducing the color difference in the lateral direction of the display; in addition, since the method of realizing four electric field directions in four directions and thus realizing four-domain orientation is adopted, the liquid crystal molecules in the middle part will also tilt under the action of the electric field and the viscosity of the liquid crystal, thereby realizing partial light transmittance, thereby improving the overall light transmittance of the structure in the display state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a VA segment code liquid crystal display without a viewing angle blind zone in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of liquid crystal molecules in a liquid crystal layer under the action of an electric field in an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the projection of the first square hollow and the second square hollow in the plane parallel to the upper ITO electrode in the embodiment of the present utility model.

[0019] Description of Figure Numbers:

[0020] 1. Upper polarizer; 2. Lower polarizer; 3. Upper glass substrate; 4. Upper ITO electrode layer; 41. First square hollow; 5. Upper PI layer; 6. Liquid crystal layer; 61. Liquid crystal molecules; 7. Lower PI layer; 8. Lower ITO electrode layer; 81. Second square hollow; 9. Lower glass substrate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes the implementation of the present invention based on its overall structure.

[0023] See also Figures 1 to 3 The utility model discloses a VA segment code liquid crystal display with no viewing angle blind zone. The VA segment code liquid crystal display with no viewing angle blind zone includes an upper polarizer 1, a lower polarizer 2 and a liquid crystal box. The upper polarizer 1 is arranged on the liquid crystal box, and the lower polarizer 2 is arranged under the liquid crystal box; the liquid crystal box is provided with an upper glass substrate 3, an upper ITO electrode layer 4, an upper PI layer 5, a liquid crystal layer 6, a lower PI layer 7, a lower ITO electrode layer 8 and a lower glass substrate 9 from top to bottom.

[0024] Key references Figure 2 and Figure 3 The upper ITO electrode layer 4 is provided with a plurality of first square hollows 41 along the first direction and the second direction, and the lower ITO electrode layer 8 is provided with a plurality of second square hollows 81 along the first direction and the second direction; the first direction and the second direction are perpendicular, and the first square hollows 41 of the upper ITO electrode layer 4 and the second square hollows 81 of the lower ITO electrode layer 8 are completely staggered. Figure 3As shown, when the first square hollow 41 on the upper ITO electrode layer 4 and the second square hollow 81 on the lower ITO electrode layer 8 are simultaneously projected onto a plane parallel to the upper ITO electrode, a second square hollow 81 is provided between two adjacent first square hollows 41, whether in the first direction or the second direction, and there is no overlap between any first square hollow 41 and any second square hollow 81. Preferably, the liquid crystal layer 6 does not rub against either the upper PI layer 5 or the lower PI layer 7, that is, the alignment process is eliminated for the upper PI layer 5 and the lower PI layer 7.

[0025] Specifically, in this embodiment, the side lengths of the first square hollow 41 and the second square hollow 81 are both 10 μm. Of course, in other embodiments, the side lengths of the first square hollow 41 and the second square hollow 81 may also be other values ​​between 10 μm and 12 μm.

[0026] Specifically, in this embodiment, in the first direction and the second direction, the spacing between two adjacent first square hollows 41 is 100 μm, and the spacing between two adjacent second square hollows 81 is also 100 μm. Of course, in other embodiments, in the first direction and the second direction, the spacing between two adjacent first square hollows 41 can also be other values ​​between 100 μm and 120 μm, and the spacing between two adjacent second square hollows 81 can also be other values ​​between 100 μm and 120 μm.

[0027] Preferably, in this embodiment, the thickness of the liquid crystal cell is between 3 μm and 4 μm, and its Δnd is between 0.275 and 0.300.

[0028] Specifically, when the liquid crystal display in this embodiment is not powered on, the arrangement of the liquid crystal molecules 61 of the liquid crystal layer 6 is similar to that of a traditional vertically aligned passive segment liquid crystal display; after power is applied, the first square hollows 41 and the second square hollows 81 will cause the upper ITO electrode layer 4 and the lower ITO electrode layer 8 to generate an inclined electric field, such as Figure 3As shown, under the action of the oblique electric field, the liquid crystal molecules 61 produce four-domain orientation in mutually perpendicular directions within the pixel that can be recognized by the human eye, thereby effectively reducing the color difference in the lateral direction of the display; in addition, due to the adoption of the method of realizing four electric field directions in four directions and thus realizing four-domain orientation, the liquid crystal molecules 61 in the middle part will also tilt under the action of the electric field and the viscosity of the liquid crystal, thereby achieving partial light transmittance and improving the overall light transmittance of the structure in the display state. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any changes, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A VA segment code liquid crystal display with no viewing angle blind zone, characterized in that: The invention comprises an upper polarizer, a lower polarizer and a liquid crystal box, wherein the upper polarizer is arranged on the liquid crystal box, and the lower polarizer is arranged under the liquid crystal box; the liquid crystal box is provided with an upper glass substrate, an upper ITO electrode layer, an upper PI layer, a liquid crystal layer, a lower PI layer, a lower ITO electrode layer and a lower glass substrate from top to bottom; wherein, The upper ITO electrode layer is provided with a plurality of first square hollows in an array along the first direction and the second direction, and the lower ITO electrode layer is provided with a plurality of second square hollows in an array along the first direction and the second direction; the first direction and the second direction are perpendicular, and the first square hollows of the upper ITO electrode layer are staggered with the second square hollows of the lower ITO electrode layer.

2. The VA segment code liquid crystal display with no viewing angle blind zone according to claim 1, characterized in that: The side lengths of the first square hollow and the second square hollow are both between 10 μm and 12 μm.

3. The VA segment code liquid crystal display with no viewing angle blind zone according to claim 1, characterized in that: In the first direction and the second direction, the intervals between two adjacent first square hollows are both between 100 μm and 120 μm.

4. The VA segment code liquid crystal display with no viewing angle blind zone according to claim 1, characterized in that: In the first direction and the second direction, the intervals between two adjacent second square hollows are both between 100 μm and 120 μm.

5. The VA segment code liquid crystal display with no viewing angle blind zone according to claim 1, characterized in that: The thickness of the liquid crystal cell is between 3 μm and 4 μm; The Δnd of the liquid crystal cell is between 0.275 and 0.

300.

6. The VA segment code liquid crystal display with no viewing angle blind zone according to claim 1, characterized in that: The liquid crystal layer does not rub against the upper PI layer and the lower PI layer.

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