TRANSFLECTIVE LIQUID CRYSTAL DISPLAY PANEL, MANUFACTURING METHOD THEREOF, AND DISPLAY DEVICE

• US 20160041427A1
• Filed: 08/08/2014
• Published: 02/11/2016
• Est. Priority Date: 01/22/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: WANG, Xinxing, YOU, Jaegeon, YAO, Jikai
• Granted Patent: US 9,733,513 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133531 characterised by the arrangement of polariser or analyser axes
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 1/133723 Polyimide, polyamide-imide
• CPC Class Codes: G02F 1/133738 for homogeneous alignment
• CPC Class Codes: G02F 1/133742 for homeotropic alignment
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/133757 with different alignment orientations

Abstract

A transflective liquid crystal display panel, a manufacturing method thereof and a display device are disclosed. The transflective liquid crystal display panel includes: a first substrate (1) and a second substrate (2) disposed oppositely and a liquid crystal layer (3) between the first substrate (1) and the second substrate (2). The first substrate (1) and the second substrate (2) include transmissive areas and reflective areas. Transmissive areas of the first substrate (1) are provided with a first homogenous alignment layer (11), transmissive areas of the second substrate (2) are provided with a second homogenous alignment layer (21), and the alignment direction of the first homogenous alignment layer (11) and the alignment direction of the second homogenous alignment layer (21) have a predetermined angle. Reflective areas of the first substrate (1) are provided with a third homogenous alignment layer (12) and reflective areas of the second substrate (2) are provided with a homeotropic alignment layer (22). This can realize a transflective liquid crystal display panel with simple structure.

Claims

1. A transflective liquid crystal display panel comprising:

a first substrate and a second substrate disposed oppositely and a liquid crystal layer between the first substrate and the second substrate, wherein

the first substrate and the second substrate include transmissive areas and reflective areas;

transmissive areas of the first substrate are provided with a first homogenous alignment layer, transmissive areas of the second substrate are provided with a second homogenous alignment layer, and an alignment direction of the first homogenous alignment layer and an alignment direction of the second homogenous alignment layer have a predetermined angle; and

reflective areas of the first substrate are provided with a third homogenous alignment layer and reflective areas of the second substrate are provided with a homeotropic alignment layer.

2. The transflective liquid crystal display panel of claim 1, further comprising:

a first polarizer sheet on the first substrate and a second polarizer sheet on the second substrate, wherein a transmission axis of the first polarizer sheet and a transmission axis of the second polarizer sheet form an angle of 0°

˜

20°

.

3. The transflective liquid crystal display panel of claim 2, wherein the transmission axis of the first polarizer sheet is parallel to the transmission axis of the second polarizer sheet.

4. The transflective liquid crystal display panel of claim 1, wherein the alignment direction of the first homogenous alignment layer and the alignment direction of the second homogenous alignment layer form a predetermined angle of 70˜

90°

.

5. The transflective liquid crystal display panel of claim 1, wherein the alignment direction of the first homogenous alignment layer and the alignment direction of the second homogenous alignment layer form an angle of 90°

.

6. The transflective liquid crystal display panel claim 1, wherein the alignment direction of the third homogenous alignment layer and the alignment direction of the first homogenous alignment layer are perpendicular to each other.

7. The transflective liquid crystal display panel of claim 1, wherein the first homogenous alignment layer, the second homogenous alignment layer, the third homogenous alignment layer and the homeotropic alignment layer comprise polyimide.

8. The transflective liquid crystal display panel of claim 1, further comprising:

a reflective layer in the reflective areas on the second substrate, wherein the reflective layer is on a side of the homeotropic alignment layer opposite to the liquid crystal layer.

9. The transflective liquid crystal display panel of claim 8, wherein upper surfaces of the homeotropic alignment layer over the reflective layer and the second homogenous alignment layer disposed in the transmissive areas of the second substrate are on a same horizontal plane.

10. A display device comprising the transflective liquid crystal display panel of claim 1.

19. The transflective liquid crystal display panel of claim 2, wherein the alignment direction of the first homogenous alignment layer and the alignment direction of the second homogenous alignment layer form a predetermined angle of 70˜

90°

.

20. The transflective liquid crystal display panel of claim 2, wherein the alignment direction of the third homogenous alignment layer and the alignment direction of the first homogenous alignment layer are perpendicular to each other.

11. A manufacturing method of a transflective liquid crystal display panel, comprising:

forming a first homogenous alignment layer in transmissive areas of a first substrate and forming a third homogenous alignment layer in reflective areas of the first substrate;

forming a homeotropic alignment layer in reflective areas of the second substrate disposed oppositely to the first substrate, and forming a second homogenous alignment layer with an alignment direction forming a predetermined angle with an alignment direction of the first homogenous alignment layer in transmissive areas of the second substrate; and

providing a liquid crystal layer between the first substrate formed with the first homogenous alignment layer and the third homogenous alignment layer and the second substrate formed with the second homogenous alignment layer and the homeotropic alignment layer.

12. The manufacturing method of claim 11, further comprising before forming the homeotropic alignment layer on the second substrate:

forming a reflective layer covering the reflective areas on a side of the second substrate close to the first substrate.

13. The manufacturing method of claim 11, further comprising after forming the liquid crystal layer:

forming a first polarizer sheet on a side of the first substrate apart from the liquid crystal layer, and forming a second polarizer sheet with a transmission axis forming an angle of 0°

˜

20°

with a transmission axis of the first polarizer sheet on a side of the second substrate apart from the liquid crystal layer.

14. The manufacturing method of claim 13, wherein forming the second polarizer sheet with the transmission axis parallel to that of the first polarizer sheet on the side of the second substrate apart from the liquid crystal layer.

15. The manufacturing method of claim 11, wherein a layer of light polymerizable homogenous alignment solution is coated on the first substrate, the light polymerizable homogenous alignment solution corresponding to the transmissive areas is masked with a mask, and the light polymerizable homogenous alignment solution corresponding to reflective areas is exposed to form the third homogenous alignment layer;

and

the third homogenous alignment layer formed in the reflective areas is masked by a mask to expose the light polymerizable homogenous alignment solution corresponding to the transmissive areas to form the first homogenous alignment layer.

16. The manufacturing method of claim 11, wherein a layer of light polymerizable homogenous alignment solution is coated on the second substrate and the light polymerizable homogenous alignment solution is exposed to form the second homogenous alignment layer with an alignment direction forming an angle of 70˜

90°

with an alignment direction of the first homogenous alignment layer; and

the second homogenous alignment layer formed in the transmissive areas is masked by a mask, a layer of light polymerizable homeotropic alignment solution is formed on the second homogenous alignment layer of the reflective areas, and the light polymerizable homeotropic alignment solution is exposed to form the homeotropic alignment layer.

17. The manufacturing method of claim 16, further comprising, after forming the second homogenous alignment layer:

subjecting the second homogenous alignment layer to interface treatment with oxygen plasma.

18. The manufacturing method of claim 11, wherein forming the first homogenous alignment layer in transmissive areas of the first substrate and forming the third homogenous alignment layer with the alignment direction perpendicular to that of the first homogenous alignment layer in reflective areas of the first substrate.