LIQUID CRYSTAL DISPLAY

• US 20110222002A1
• Filed: 12/28/2010
• Published: 09/15/2011
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Moon Gyu
• Granted Patent: US 8,525,958 B2
• Time in Patent Office: Days
• US Class Current: 349/96
• 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 1/133565 inside the LC elements, i.e. between the cell substrates

Abstract

A liquid crystal display includes a first substrate, and a first optical conversion layer disposed on the first substrate. The first optical conversion layer includes a reflecting unit reflecting incident light, and a polarizing unit. The polarizing unit transmits light which oscillates in a first direction among the incident light, and reflects light which oscillates in a second direction different from the first direction among the incident light. The reflecting unit and the polarizing unit of the first optical conversion layer may be disposed in at least one pixel area.

Claims

1. A liquid crystal display, comprising:

a first substrate; and

a first optical conversion layer disposed on the first substrate, the first optical conversion layer including;

a reflecting unit reflecting incident light; and

a polarizing unit transmitting light which oscillates in a first direction, among the incident light,

wherein the polarizing unit reflects light which oscillates in a second direction different from the first direction, among the incident light.

2. The liquid crystal display of claim 1, wherein:

the reflecting unit and the polarizing unit of the first optical conversion layer are disposed in at least one pixel area.

3. The liquid crystal of claim 2, further comprising:

a second substrate facing the first substrate; and

a polarizer disposed on an outer surface of the second substrate,

wherein the polarizer transmits the light which oscillates in the second direction, and absorbs light which oscillates in a third direction different from the second direction.

4. The liquid crystal display of claim 3, wherein:

the first direction and the second direction are perpendicular to each other.

5. The liquid crystal display of claim 2, further comprising:

a second substrate facing the first substrate;

a polarizer disposed on an outer surface of the second substrate; and

a second optical conversion layer disposed on an inner surface of the second substrate opposing the outer surface,

wherein the second optical conversion layer reflects the light which oscillates in the first direction, and transmits the light which oscillates in the second direction.

6. The liquid crystal display of claim 5, wherein:

the first direction and the second direction are perpendicular to each other.

7. The liquid crystal display of claim 5, wherein:

the polarizer absorbs the light which oscillates in the first direction, and transmits the light which oscillates in the second direction.

8. The liquid crystal display of claim 2, further comprising:

a plurality of thin films disposed on the first substrate; and

an insulating layer disposed between the plurality of thin films and the first optical conversion layer.

9. The liquid crystal display of claim 8, wherein:

the plurality of thin films include a plurality of a signal line, a switching element connected to the plurality of signal lines, and a pixel electrode connected to the switching element.

10. The liquid crystal display of claim 2, further comprising:

an insulating layer disposed on the first substrate and disposed overlapping the reflecting unit of the first optical conversion layer.

11. The liquid crystal display of claim 1, further comprising:

a second substrate facing the first substrate; and

a polarizer disposed on an outer surface of the second substrate,

wherein the polarizer transmits the light which oscillates in the second direction, and absorbs light which oscillates in a third direction different from the second direction.

12. The liquid crystal of claim 11, wherein:

the first direction and the second direction are perpendicular to each other.

13. The liquid crystal display of claim 1, further comprising:

a second substrate facing the first substrate;

a polarizer disposed on an outer surface of the second substrate; and

a second optical conversion layer disposed on an inner surface of the second substrate opposing the outer surface,

wherein the second conversion layer reflects the light which oscillates in the first direction, and transmits the light which oscillates in the second direction.

14. The liquid crystal display of claim 13, wherein:

the first direction and the second direction are perpendicular to each other.

15. The liquid crystal display of claim 13, wherein:

the polarizer absorbs the light which oscillates in the first direction, and transmits the light which oscillates in the second direction.

16. The liquid crystal display of claim 1, further comprising:

a plurality of thin films disposed on the first substrate; and

an insulating layer disposed between the plurality of thin films and the first optical conversion layer.

17. The liquid crystal display of claim 16, wherein:

the plurality of thin films include a plurality of a signal line, a switching element connected to the plurality of signal lines, and a pixel electrode connected to the switching element.

18. The liquid crystal display of claim 1, further comprising:

an insulating layer disposed on the first substrate and disposed overlapping the reflecting unit of the first optical conversion layer.

19. A method of forming a liquid crystal display, the method comprising:

forming an optical conversion layer on an upper surface of a first display substrate;

forming a polarizer on an upper surface of a second display substrate; and

disposing the first and second display panels facing each other, the optical conversion layer facing the second display panel,

wherein the optical conversion layer includes;

a reflecting unit reflecting incident light to the liquid crystal display; and

a polarizing unit transmitting light which oscillates in a first direction,

among the incident light,

wherein the polarizing unit reflects light which oscillates in a second direction different from the first direction, among the incident light.

20. The method of claim 19, wherein the forming an optical conversion layer on an upper surface of a first display substrate comprises:

disposing a metal layer directly on the upper surface of the first display substrate;

patterning a portion of the disposed metal layer excluding an area of the reflecting unit to simultaneously form both the reflecting unit and the polarizing unit;

wherein

the polarizing unit includes a plurality of a metal pattern spaced apart from each other; and

the reflecting unit and the polarizing unit include a same material.