In-cell polarizer, liquid crystal display including the same, and method of manufacturing liquid crystal display

• US 9,696,589 B2
• Filed: 10/24/2014
• Issued: 07/04/2017
• Est. Priority Date: 01/13/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.), Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chung, Jaeseung, Lee, Daeyoung, Jo, Gugrae, Lee, Sunghoon, Kim, Dongouk, Park, Joonyong, Shin, Bongsu, Hahm, Sukgyu
• Primary Examiner(s): Lee, Paul
• Assistant Examiner(s): PAN, JIA X
• Application Number:
  US14/522,787
• Publication Number:
  US 20150198833A1
• Time in Patent Office: 984 Days
• CPC Class Codes: G02B 5/3058 comprising electrically conductive elements, e.g. wire grids, conductive particles
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133536 Reflective polarizers G02F1/13362 takes precedence
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/13362 providing polarized light, e.g. by converting a polarisation component into another one

Abstract

A liquid crystal display includes a light source unit, a first substrate provided on the light source unit, an electrode layer provided on the first substrate, a second substrate separate from the electrode layer, a polarizing plate provided on a surface of the second substrate, a liquid crystal layer disposed between the electrode layer and the second substrate, a reflecting unit provided on a surface of the first substrate; and a wire grid polarizer provided on an opposite surface of the first substrate.

Claims

1. A liquid crystal display comprising:

a light source unit;

a first substrate provided on the light source unit;

an electrode layer provided on the first substrate;

a second substrate separate from the electrode layer;

a polarizing plate provided on a surface of the second substrate;

a liquid crystal layer disposed between the electrode layer and the second substrate;

a reflecting unit provided on a surface of the first substrate to reflect light from the light source unit; and

a wire grid polarizer provided on an opposite surface of the first substrate,

wherein the reflecting unit and the wire grid polarizer are provided on different surfaces of the first substrate respectively, and

a region in which the reflecting unit is provided and a region in which the wire grid polarizer is provided are separated from each other in a plan view.

2. The liquid crystal display of claim 1,

wherein the first substrate comprises:

a first surface facing the light source unit; and

a second surface facing the electrode layer,

wherein the reflecting unit is provided on the first surface of the first substrate, and

wherein the wire grid polarizer is provided on the second surface of the first substrate.

3. The liquid crystal display of claim 1,

wherein the electrode layer comprises a black matrix, and

wherein the reflecting unit is arranged in a position corresponding to the black matrix.

4. The liquid crystal display of claim 3, wherein the wire grid polarizer is arranged in a position corresponding to an opening area in which the electrode layer is exposed by the black matrix.

5. The liquid crystal display of claim 1, wherein the reflecting unit has at least one tilted side surface in a cross section.

6. The liquid crystal display of claim 1, wherein the reflecting unit comprises a plurality of unit bodies.

7. The liquid crystal display of claim 6,

wherein each of the plurality of unit bodies has at least one tilted side surface in a cross section, and

wherein the plurality of unit bodies is arranged in a one-dimensional array structure or a two-dimensional array structure.

8. The liquid crystal display of claim 7, wherein each of the plurality of unit bodies has at least one of a trapezoidal cross-section, a semicircular cross-section, and a triangular cross-section.

9. The liquid crystal display of claim 1, wherein the reflecting unit comprises:

a body; and

an uneven unit provided on the body.

10. The liquid crystal display of claim 9, wherein the body has a rectangular cross-section or a trapezoidal cross-section.

11. An in-cell polarizer comprising:

a substrate;

a reflecting unit provided on a surface of the substrate to reflect light from a light source unit; and

a wire grid polarizer provided on an opposite surface of the substrate,

wherein the reflecting unit and the wire grid polarizer are provided on different surfaces of the first substrate respectively, and

a region in which the reflecting unit is provided and a region in which the wire grid polarizer is provided are separated from each other in a plan view.

12. The in-cell polarizer of claim 11, wherein the reflecting unit is provided in a partial region of the substrate.

13. The in-cell polarizer of claim 11, wherein the reflecting unit has at least one tilted side surface in a cross section.

14. The in-cell polarizer of claim 11, wherein the reflecting unit comprises a plurality of unit bodies.

15. The in-cell polarizer of claim 14,

wherein each of the plurality of unit bodies has at least one tilted side surface in a cross section, and

wherein the plurality of unit bodies is arranged in a one-dimensional array structure or a two-dimensional array structure.

16. The in-cell polarizer of claim 15, wherein each of the plurality of unit bodies has at least one of a trapezoidal cross-section, a semicircular cross-section, and a triangular cross-section.

17. The in-cell polarizer of claim 11, wherein the reflecting unit comprises:

a body; and

an uneven unit provided on the body.