Optical plate, method of manufacturing the same, and liquid crystal display device having the same

• US 8,279,371 B2
• Filed: 02/01/2007
• Issued: 10/02/2012
• Est. Priority Date: 02/01/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Song, Min-young, Kim, Jin-soo, Joo, Byung-yun, Ha, Ju-hwa, Paek, Jung-wook, Choi, Jin-sung, Lee, Sang-hoon
• Primary Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US11/670,134
• Publication Number:
  US 20080037272A1
• Time in Patent Office: 2,070 Days
• Field of Search: 349 61- 71, 349/95, 362/561
• US Class Current: 349/65
• CPC Class Codes: B29D 11/00663 Production of light guides
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0053 Prismatic sheet or layer; Brightness enhancement element, sheet or layer
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0071 with elongated shape, e.g. tube
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package

Abstract

A method of manufacturing an optical plate, includes forming a protrusion on a base film by jetting ink containing a liquid resin on the base film, contacting a light guiding plate to the protrusion, and curing the protrusion which contacts with the light guiding plate.

Claims

1. A method of manufacturing an optical plate, comprising:

forming a protrusion on a base film;

contacting a light guiding plate to the protrusion formed on the base film; and

curing the protrusion in a state where the light guiding plate is in contact with the protrusion formed on the base film, so that the cured protrusion attaches the base film to the light guiding plate,

wherein the base film, the cured protrusion and the light guiding plate indivisibly bond together without an additional adhesive.

2. The method according to claim 1, wherein the protrusion comprises a light collecting pattern.

3. The method according to claim 2, wherein the protrusion is formed by jetting ink containing a liquid resin,

wherein the liquid resin comprises an ultraviolet (UV) curing resin, and wherein the light collecting pattern is cured by ultraviolet rays.

4. The method according to claim 2, wherein the light collecting pattern has a stripe shape.

5. The method according to claim 4, wherein the light collecting pattern is provided to be plural in number, the plurality of light collecting patterns being disposed in parallel with each other.

6. The method according to claim 4, wherein the cured light collecting pattern has a larger contact area with the base film than that with the light guiding plate.

7. The method according to claim 6, wherein the base film comprises a plurality of light diffusing beads.

8. The method according to claim 7, wherein the base film further includes a base resin part formed of one of a polycarbonate resin or a poly vinyl chloride resin, and wherein the light diffusing beads comprise a material which has a refractive index different from a refractive index of the base resin part.

9. The method according to claim 8, wherein the light diffusing beads comprise polyethyleneterephthalate (PET).

10. The method according to claim 2, wherein the light collecting pattern is provided as a dot pattern.

11. An optical plate comprising:

a light guiding plate;

a base film which is located on the light guiding plate; and

a light collecting pattern disposed between the base film and the light guiding plate, the light collecting pattern being in direct contact with both the base film and the light guiding plate to attach the base film to the light guiding plate,

wherein the base film, the light collecting pattern and the light guiding plate indivisibly bond together without an additional adhesive.

12. The optical plate according to claim 11, wherein the light collecting pattern comprises an ultraviolet (UV) curing resin,

wherein the light collecting pattern is cured in a state where the light guiding plate contacts with the light collecting pattern formed on the base film and attaches the base film to the light guiding plate without an additional adhesive.

13. The optical plate according to claim 11, wherein the base film comprises a plurality of light diffusing beads.

14. The optical plate according to claim 13, wherein the base film further includes a base resin part formed of one of a polycarbonate resin or a poly vinyl chloride resin, and wherein the light diffusing beads comprise a material which has a refractive index different from a refractive index of the base resin part.

15. The optical plate according to claim 14, wherein the light diffusing beads comprise polyethyleneterephthalate (PET).

16. A liquid crystal display device, comprising:

a liquid crystal display panel;

an optical plate which is provided in rear of the liquid crystal display panel, the optical plate comprises a light guiding plate, a base film provided on the light guiding plate and a light collecting pattern disposed between the base film and the light guiding plate, the light collecting pattern being in direct contact with both the base film and the light guiding plate to attach the base film to the light guiding plate; and

a light source which is provided on at least a lateral side of the light guiding plate,

wherein the base film, the light collecting pattern and the light guiding plate indivisibly bond together without an additional adhesive.

17. The liquid crystal display device according to claim 16, wherein the light collecting pattern has a larger contact area with the base film than that with the light guiding plate.

18. The liquid crystal display device according to claim 16, wherein the light collecting pattern is of a stripe type and is provided to be plural in number, the plurality of light collecting patterns being in parallel with each other.

19. The liquid crystal display device according to claim 18, wherein the light source is disposed in parallel with an extension direction of the light collecting pattern.

20. The liquid crystal display device according to claim 16, wherein the light collecting pattern comprises an ultraviolet (UV) curing resin,

wherein the light collecting pattern is cured in a state where the light guiding plate contacts with the light collecting pattern formed on the base film and attaches the base film to the light guiding plate without an additional adhesive.

21. The liquid crystal display according to claim 16, wherein the base film comprises a plurality of light diffusing beads.

22. The liquid crystal display according to claim 21, wherein the base film further includes a base resin part formed of one of a polycarbonate resin or a poly vinyl chloride resin, and wherein the light diffusing beads comprise a material which has a refractive index different from a refractive index of the base resin part.

23. The liquid crystal display according to claim 22, wherein the light diffusing beads comprise polyethyleneterephthalate (PET).