Liquid crystal display device and method of fabricating the same

• US 10,379,394 B2
• Filed: 07/22/2013
• Issued: 08/13/2019
• Est. Priority Date: 09/19/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Qin, Guangkui
• Primary Examiner(s): Glick, Edward J
• Assistant Examiner(s): Teets, Mark D
• Application Number:
  US13/947,528
• Publication Number:
  US 20140078434A1
• Time in Patent Office: 2,213 Days
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio

Abstract

Embodiments of the present invention provide a liquid crystal display device and a fabricating method thereof, the display device comprising: a liquid crystal cell, including a color filter substrate and an array substrate provided opposite to each other and liquid crystal material provided between the two substrates; a lower polarizer, provided on a lower surface of the liquid crystal cell, i.e. a light incident side; an upper polarizer, provided on an upper surface of the liquid crystal cell, i.e. a light exiting side; and a light shielding pattern layer, including light shielding lines and being provided above the upper polarizer, i.e., at a light exiting side of the upper polarizer, wherein the color filter substrate is formed with a black matrix and a color filter thereon, and the array substrate is formed with gate lines, data lines, and thin film transistors thereon.

Claims

1. A liquid crystal display device, comprising:

a liquid crystal cell, including a color filter substrate and an array substrate provided opposite to each other and liquid crystal material provided between the color filter substrate and the array substrate;

a lower polarizer, provided on a light incident side of the liquid crystal cell;

an upper polarizer, provided on a light exiting side of the liquid crystal cell; and

a light shielding pattern layer, consisting of light shielding lines and being provided at a light exiting side of the upper polarizer,

wherein the color filter substrate is formed with a black matrix and a color filter thereon, and the array substrate is formed with gate lines, data lines, and thin film transistors thereon,

wherein positions of the light shielding lines directly correspond to regions of the liquid crystal display device formed with a black matrix therein,

wherein a pattern formed by the light shielding lines is identical to a pattern of the black matrix,

wherein the light shielding lines consist of a plurality of first light shielding lines and a plurality of second light shielding lines, and the plurality of first light shielding lines and the plurality of second light shielding lines are in parallel with the gate lines and the data lines, respectively,

wherein, from a top view, each of the plurality of first light shielding lines is only located within a region where a corresponding gate line is provided, and each of the plurality of second light shielding lines is only located within a region where a corresponding data line is provided, and

wherein the light shielding lines are configured to absorb light emitting toward the light shielding lines in a non-axis direction and allow light in an axis direction to pass through.

2. The liquid crystal display device according to claim 1, wherein the liquid crystal display device further comprises a scattering film provided at a light exiting side of the light shielding pattern layer.

3. The liquid crystal display device according to claim 1, wherein positions of the light shielding lines correspond to opaque regions in pixel regions of the liquid crystal cell.

4. The liquid crystal display device according to claim 3, wherein the positions of the light shielding lines correspond to regions where the gate lines and the data lines of the liquid crystal cell are located.

5. The liquid crystal display device according to claim 1, further comprising:

a transparent layer, wherein the transparent layer covers the light shielding lines and regions between the light shielding lines;

or the transparent layer is merely filled in the regions between the light shielding lines.

6. The liquid crystal display device according to claim 5, wherein the transparent layer has a scattering function.

7. The liquid crystal display device according to claim 6, wherein the transparent layer is doped with scattering particles.

8. The liquid crystal display device according to claim 6, wherein on the upper surface of the transparent layer, there is formed a concave convex structure.

9. The liquid crystal display device according to claim 1, wherein the light shielding lines of the light shielding pattern layer form enclosed regions.

10. The liquid crystal display device according to claim 9, wherein the enclosed regions is in a rectangular, circular, elliptical, or hexagonal shape.

11. A fabricating method of the liquid crystal display device according to claim 1, comprising:

fabricating a liquid crystal cell;

attaching an upper polarizer and a lower polarizer onto an upper surface and a lower surface of the liquid crystal cell, respectively;

fabricating a light shielding film on the upper polarizer of the liquid crystal display device; and

forming a light shielding pattern layer including light shielding lines with a patterning process,

wherein positions of the light shielding lines directly correspond to regions of the liquid crystal cell formed with a black matrix therein,

wherein a pattern formed by the light shielding lines is identical to a pattern of the black matrix.

12. The fabricating method according to claim 11, wherein the forming the light shielding pattern layer by using the patterning process comprises:

coating a photoresist on a surface of the light shielding film;

retaining the photoresist corresponding to the light shielding lines of the light shielding pattern layer to be formed by means of exposure and development processes;

removing a portion of the light shielding film not protected by the photoresist to form the light shielding lines of the light shielding pattern layer; and

removing the remaining photoresist.

13. The fabricating method according to claim 11, further comprising:

on the liquid crystal display device formed with the light shielding pattern layer, filling transparent material merely in regions between the light shielding lines to form a transparent layer, or covering the light shielding lines and the regions between the light shielding lines with the transparent material to form a transparent layer.

14. The fabricating method according to claim 11, further comprising:

providing a scattering film on the liquid crystal display device formed with the light shielding pattern layer.

15. The fabricating method according to claim 14, further comprising:

doping the transparent layer with scattering particles.

16. The fabricating method according to claim 14, further comprising:

forming a concave convex structure on an upper surface of the transparent layer.

17. The fabricating method according to claim 11, wherein positions of the light shielding lines correspond to opaque regions in pixel regions of the liquid crystal display device.

18. The liquid crystal display device according to claim 17, wherein the positions of the light shielding lines correspond to regions where gate lines and data lines of the liquid crystal cell are located.