LCD with resin layer between front plate and substrate

• US 7,382,422 B2
• Filed: 08/20/2004
• Issued: 06/03/2008
• Est. Priority Date: 08/22/2003
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Niiyama, Satoshi, Tsushima, Hitoshi
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): Vu; Phu
• Application Number:
  US10/921,842
• Publication Number:
  US 20050083465A1
• Time in Patent Office: 1,383 Days
• Field of Search: 349/58
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G09F 9/35 being liquid crystals G09F9/302 takes precedence; liquid crystal materials C09K19/00; liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13

Abstract

An aspect of a public display device includes a transparent front plate 210, a rear frame 220 and a display panel 230. The rear frame 220 is configured to have a waterproof structure, and the transparent front plate and the rear frame are sealed with a silicone resin interposed therebetween so as to have a waterproof property. A transparent gel-like resin layer 250 is formed between a rear side of the transparent front plate and a front side of the display panel. The transparent gel-like resin layer reduces a stress, which is applied to the display panel by deformation of the transparent front plate. Thus, it is possible to prevent a display state from being changed by an external force when a memory type liquid crystal display device is used.

Claims

1. A display device comprising:

a display panel having an active area to display an image;

a transparent front plate disposed in front of the display panel;

a transparent resin layer in a gel state, the resin layer formed between the front plate and the active area; and

a frame connected to the transparent front plate and configured to cover the display panel such that a void is formed between the display panel and the frame.

2. The display device according to claim 1, wherein the transparent resin layer is formed so as to cover a substantially entire region of the active area.

3. The display device according to claim 1, wherein the transparent resin layer has a ¼

consistency of from 5 to 500.

4. The display device according to claim 1, wherein the transparent resin layer is formed by curing a two-component liquid resin material injected into between the display panel and the front plate.

5. The display device according to claim 4, wherein the liquid resin material has a viscosity of 100 to 2,000 mPaS (at 25°

C.).

6. The display device according to claim 4, wherein the liquid resin material includes a retarder.

7. The display device according to claim 1, wherein the active area and the front plate have a layered structure formed therebetween without interposition of an air layer.

8. The display device according to claim 1, wherein the display panel displays images in a plurality of memory type display states.

9. The display device according to claim 1, wherein the front plate comprises an inflexible glass plate.

10. The display device according to claim 1, wherein the front plate has a curved shape.

11. The display device according to claim 1, wherein the display panel comprises a liquid display panel, and the transparent resin layer contains an ultraviolet absorber.

12. The display device according to claim 1, wherein the resin layer is disposed at least between the display panel and the front plate.

13. The display device according to claim 1, wherein the frame comprises:

an injection port through which a resin is inserted to form the resin layer; and

an evacuation port through which air inside the frame is evacuated.

14. A display device comprising:

a display panel having an active area to display an image;

a transparent front plate disposed in front of the display panel;

a transparent elastic resin layer formed between the front plate and the active area so as to restrain a stress from being applied from the front plate to the display panel; and

a frame connected to the transparent front plate and configured to cover the display panel such that a void is formed between the display panel and the frame.

15. The display device according to claim 14, wherein the transparent elastic resin layer has a tensile elasticity of 100 MPa or below at 25°

C.

16. The display device according to claim 14, wherein the transparent elastic resin layer is formed by curing a two-component liquid resin material injected between the display panel and the front plate.

17. The display device according to claim 14, wherein the resin layer is disposed at least between the display panel and the front plate.

18. The display device according to claim 14, wherein the frame comprises:

an injection port through which a resin is inserted to form the resin layer; and

an evacuation port through which air inside the frame is evacuated.

19. A display device comprising:

a display panel having an active area to display an image;

a transparent front plate disposed in front of the display panel;

a transparent elastic resin layer formed between the front plate and the active area so as to restrain a stress from being applied to the display panel;

plural fixing members, which are disposed between the display panel and the front plate to fix the display panel to the front panel, wherein the plural fixing members are disposed at intervals to form spacings, which are filled with the transparent elastic resin layer; and

a frame connected to the transparent front plate and configured to cover the display panel such that a void is formed between the display panel and the frame.

20. The display device according to claim 19, wherein the transparent elastic resin layer comprises a resin material in a gel state.

21. The display device according to claim 19, wherein the resin layer is disposed at least between the display panel and the front plate.

22. The display device according to claim 19, wherein the frame comprises:

an injection port through which a resin is inserted to form the resin layer; and

an evacuation port through which air inside the frame is evacuated.