LIQUID CRYSTAL DISPLAY PANEL, LIQUID CRYSTAL DISPLAY DEVICE, AND RELATED MANUFACTURING METHOD

• US 20150070614A1
• Filed: 05/13/2014
• Published: 03/12/2015
• Est. Priority Date: 09/11/2013
• Status: Active Grant

• Current Assignee: TCL China Star Optoelectronics Technology Co. Ltd. (TCL Technology Group Corp.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: PARK, JAE BYUNG, SIM, Mun-Ki, LEE, Sumi, KIM, YOUNGMIN
• Granted Patent: US 9,494,819 B2
• Time in Patent Office: Days
• US Class Current: 349/43
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133536 Reflective polarizers G02F1/13362 takes precedence
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

A liquid crystal display panel includes two base substrates disposed spaced apart from each other, a pixel, and at least one polarizer. The liquid crystal display panel includes a transmitting area and a light blocking area disposed adjacent to the transmitting area. The polarizer includes a reflection part overlapped with the light blocking area and a polarization part overlapped with the transmitting area. The polarization part includes lyotropic chromonoic liquid crystal dye molecules aligned in a predetermined direction.

Claims

1. A liquid crystal display panel comprising:

a first base substrate that includes a transmitting area and a light blocking area disposed adjacent to the transmitting area;

a second base substrate disposed spaced apart from the first base substrate;

a pixel disposed between the first base substrate and the second base substrate; and

first and second polarizers disposed spaced apart from each other such that the pixel is disposed between the first and second polarizers, wherein the first polarizer comprises a reflection part overlapped with the light blocking area and a polarization part overlapped with the transmitting area, and the polarization part comprises lyotropic chromonoic liquid crystal dye molecules aligned in a predetermined direction.

2. The liquid crystal display panel of claim 1, wherein the first polarizer receives a light provided from a backlight unit earlier than the second polarizer.

3. The liquid crystal display panel of claim 2, wherein the first polarizer is disposed between a surface of the first base substrate and the pixel.

4. The liquid crystal display panel of claim 3, wherein the reflection part comprises a metal layer disposed on the surface of the first base substrate.

5. The liquid crystal display panel of claim 3, wherein the polarization part comprises:

a light alignment layer disposed on the surface of the first base substrate; and

a polarizing pattern including the lyotropic chromonoic liquid crystal dye molecules aligned by the light alignment layer.

6. The liquid crystal display panel of claim 5, wherein the lyotropic chromonoic liquid crystal dye molecules comprise bis-(N,N diethylaminoethyl)perylene-3,4,9,10-tetracarboxylic diimide (PDI-DEAE).

7. The liquid crystal display panel of claim 3, wherein the pixel comprises:

a thin film transistor connected to a gate line and a data line; and

a pixel electrode connected to the thin film transistor,

wherein the gate line is disposed on the first polarizer and insulated from the reflection part and the data line is insulated from the gate line.

8. The liquid crystal display panel of claim 7, wherein the pixel electrode is overlapped with the polarization part and the thin film transistor is overlapped with the reflection part.

9. The liquid crystal display panel of claim 1, wherein the second polarizer is a stretched-element polarizing film.

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

a black matrix overlapped with the light blocking area; and

a color filter overlapped with the transmitting area.

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

forming a reflection part on a surface of a base substrate including a transmitting area and a light blocking area adjacent to the transmitting area, the reflection part being overlapped with the light blocking area;

forming a polarization part containing lyotropic chromonoic liquid crystal dye molecules aligned in a predetermined direction on the surface of the base substrate, the polarization part being overlapped with the transmitting area; and

forming a pixel on the surface of the base substrate to overlap with the transmitting area.

12. The method of claim 11, wherein the forming of the polarization part comprises:

forming a light alignment layer having an alignment axis in the predetermined axis on the surface of the base substrate;

coating a mixture solution containing the lyotropic chromonoic liquid crystal dye molecules, a light curing agent, and a crosslink agent on the light alignment layer to form a coating layer;

irradiating a light to the coating layer from the other surface of the base substrate to partially cure the coating layer; and

removing a portion of the coating layer, which is not cured.

13. The method of claim 11, wherein the forming of the polarization part comprises:

shear-coating a mixture solution containing the lyotropic chromonoic liquid crystal dye molecules, a light curing agent, and a crosslink agent on the surface of the base substrate to form a coating layer;

irradiating a light to the coating layer from the other surface of the base substrate to partially cure the coating layer; and

removing a portion of the coating layer, which is not cured.

14. A liquid crystal display device comprising:

a liquid crystal display panel that includes a first base substrate, a second base substrate disposed spaced apart from the first base substrate, and a plurality of pixels disposed between the first base substrate and the second base substrate, the liquid crystal display panel including a plurality of transmitting areas and a light blocking area disposed adjacent to the transmitting areas when viewed in a plan view;

a backlight unit that provides a light to the liquid crystal display panel; and

first and second polarizers disposed spaced apart from each other such that the pixels are disposed between the first and second polarizers, the first polarizer comprising;

a plurality of stretched-element polarizing films each of which is overlapped with a portion of the transmitting areas;

a plurality of polarization parts overlapped with the other portion of the transmitting areas, which is not overlapped with the polarizing films, and containing lyotropic chromonoic liquid crystal dye molecules aligned in a predetermined direction; and

a reflection part overlapped with a portion of the light blocking area, which is disposed adjacent to the transmitting areas not overlapped with the polarizing films.

15. The liquid crystal display device of claim 14, wherein the stretched-element polarizing films have an optical axis in the same direction as an optical direction of the polarization part.

16. The liquid crystal display device of claim 15, wherein the first polarizer is disposed closer to the backlight unit than the second polarizer.

17. The liquid crystal display device of claim 16, wherein the reflection part comprises a metal layer disposed on a surface of the first base substrate.

18. The liquid crystal display device of claim 16, wherein the polarization part further comprises an alignment layer disposed on the surface of the first base substrate to align the lyotropic chromonoic liquid crystal dye molecules.

19. The liquid crystal display device of claim 16, wherein the lyotropic chromonoic liquid crystal dye molecules comprise bis-(N,N diethylaminoethyl)perylene-3,4,9,10-tetracarboxylic diimide (PDI-DEAE).