Display device and method for fabricating the same

• US 20050083465A1
• Filed: 08/20/2004
• Published: 04/21/2005
• 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
• Granted Patent: US 7,382,422 B2
• Time in Patent Office: Days
• US Class Current: 349/122
• 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; and

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

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.).

8. 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.

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

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

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

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

14. 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.

6. 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; and

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.

7. The display device according to claim 6, wherein the transparent elastic resin layer has a tensile elasticity of 100 MPa or below at 25°

C.

9. The display device according to claim 6, 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.

15. A method for fabricating a display device, which comprises a display panel having an active area to display an image;

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

comprising;

fixing the display panel to the front plate by a fixing member;

injecting a liquid resin material into a space in a depressurized state, the space formed between the display panel and the front plate; and

curing the liquid resin material to form an elastic transparent resin layer or a transparent gel-like resin layer between the display panel and the front plant.

16. The method according to claim 15, further comprising injecting the liquid resin material under a degree of depressurization of from 1.33×

10⁴ to 6.67×

10⁴ Pa, in the step for injecting the liquid resin material.

17. The method according to claim 15, further comprising injecting the liquid resin material with the display panel and the front panel being inclined, in the step for injecting the liquid resin material.

18. The method according to claim 17, further comprising modifying an inclination angle of the display panel and the front plate with respect to a horizontal direction according to an injection amount of the liquid resin material, in the step for injecting the liquid resin material.

19. The method according to claim 15, comprising:

fixing the display panel and the front plate by plural fixing members, which are disposed at intervals to form spacings; and

injecting the liquid resin material into the space formed between the display panel and the front plate while discharging a portion of the liquid resin material, through the spacings, from the space formed between the display panel and the front plate, in the step for injecting the liquid resin material.

20. The method according to claim 15, further comprising fixing a frame to the front plate before injecting the liquid resin material, the frame being configured to surround the display panel and prevent the liquid resin material from discharging.

21. The method according to claim 15, further comprising:

fixing the frame to the front plate before injecting the liquid resin material, the frame being configured to surround the display panel and to have provided with an evacuation port, and;

evacuating a gas through the evacuation port to depressurize an inner space of the frame in the step for injecting the liquid resin material.

22. The method according to claim 15, wherein the liquid resin material comprises a two-component curable resin containing no solvent.

23. 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; and

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.

24. The display device according to claim 23, wherein the transparent elastic resin layer comprises a resin material in a gel state.