LIQUID CRYSTAL DISPLAY AND MANUFACTURING METHOD THEREOF

• US 20130242228A1
• Filed: 10/04/2012
• Published: 09/19/2013
• Est. Priority Date: 03/15/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kang, Jong Hyuk, Cho, Hyun Min, PARK, JAE BYUNG, Yun, Sung Sik, Park, Hae IL
• Granted Patent: US 9,995,963 B2
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 2/02 Frequency-changing of light, e.g. by quantum counters
• CPC Class Codes: G02F 2201/08 light absorbing layer
• CPC Class Codes: G02F 2202/02 organic material
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G02F 2203/055 wavelength filtering

Abstract

A wide viewing angle liquid crystal display includes color filters having a quantum dot and scattering particles and liquid crystal layer disposed in a microcavity, a distance between the color filter and the liquid crystal layer being sized to minimize display deterioration due to parallax.

Claims

1. A liquid crystal display, comprising:

a backlight unit comprising a light source;

a display panel comprising a liquid crystal layer disposed in a microcavity;

a color filter configured to change a wavelength of light supplied from the light source to display a color;

a lower polarizer located between the liquid crystal layer and the backlight unit; and

an upper polarizer located between the liquid crystal layer and the color filter.

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

the display panel comprises an upper panel and a lower panel,

the lower panel comprises the liquid crystal layer and the lower polarizer, and

the upper panel comprises the color filter.

3. The liquid crystal display of claim 2, wherein the upper polarizer is configurable to be located in either the upper panel or the lower panel.

4. The liquid crystal display of claim 3,

wherein the upper polarizer and the lower polarizer comprise a polarization element configured to generate polarization, and

wherein the polarization element has a tri-acetyl-cellulose (TAC) layer.

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

the microcavity is shaped by a support layer,

an alignment layer is formed on the support layer, and

the liquid crystal layer is aligned by the alignment layer.

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

a common electrode and a patterned insulating layer are over the support layer, and

a liquid crystal injection hole is formed on the patterned insulating layer, the common electrode, and the support layer.

7. The liquid crystal display of claim 1, wherein the color filter comprises quantum dot particles configured to convert light supplied from the light source.

8. The liquid crystal display of claim 7, wherein the light source is a blue light source.

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

the color filter comprises a transparent color filter for displaying the color blue, and

the transparent color filter comprises scattering particles.

10. The liquid crystal display of claim 1, wherein a blue light transmitting layer is located between the liquid crystal layer and the color filter and is configured to transmit only light in a blue wavelength band.

11. The liquid crystal display of claim 10, wherein a blue light blocking layer is configured to block light in a blue wavelength band and is located at a side of the color filter opposite the blue light transmitting layer.

12. The liquid crystal display of claim 11, wherein the transparent color filter does not have the blue light blocking layer formed thereon.

13. The liquid crystal display of claim 7, wherein the light source is an ultraviolet rays light source.

14. The liquid crystal display of claim 13, wherein an ultraviolet rays transmitting layer is located between the liquid crystal layer and the color filter and is configured to transmit only ultraviolet rays.

15. The liquid crystal display of claim 14, wherein an ultraviolet rays blocking layer is configured to block the ultraviolet rays and is located at a side of the color filter opposite the ultraviolet rays transmitting layer.

16. The liquid crystal display of claim 1, wherein the display panel comprises one display panel.

17. The liquid crystal display of claim 16, wherein the upper polarizer comprises metal wirings arranged with an interval of about 100 nm or less.

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

forming a thin film transistor on a substrate;

forming a pixel electrode on the thin film transistor;

forming a sacrificial layer on the pixel electrode;

forming a support layer on the sacrificial layer;

forming a microcavity comprising a liquid crystal injection hole by removing the sacrificial layer;

injecting a liquid crystal material into the microcavity;

forming a coating layer on the support layer so as to cover the liquid crystal injection hole; and

forming a color filter comprising quantum dot particles for converting light supplied from a light source.

19. The method of manufacturing a liquid crystal display of claim 18, further comprising forming an alignment layer on an outer wall of the microcavity before the liquid crystal material is injected into the microcavity.

20. The method of manufacturing a liquid crystal display of claim 18, further comprising:

forming a common electrode between the support layer and the coating layer,

wherein the liquid crystal injection hole is also formed in the common electrode.

21. A liquid crystal display comprising:

a backlight unit;

a color filter; and

a liquid crystal layer formed in a microcavity located between the backlight unit and the color filter;

wherein the color filter comprises quantum dot particles configured to refract and disperse light from the backlight unit; and

wherein a distance between the color filter and the liquid crystal layer is sized to minimize display deterioration due to parallax.