Flat display device

• US 6,512,514 B1
• Filed: 08/04/2000
• Issued: 01/28/2003
• Est. Priority Date: 08/05/1999
• Status: Expired due to Term

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Warashina, Rikiya, Sugiyama, Mamiko
• Primary Examiner(s): Chow, Dennis-Doon
• Application Number:
  US09/633,166
• Time in Patent Office: 907 Days
• Field of Search: 345/204, 345/205, 345/206, 345/87, 349/58, 349/59, 349/60, 349/56
• US Class Current: 345/206
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock

Abstract

A liquid crystal display device has a liquid crystal display panel and a surface light source unit laminated and located on a resin frame. The frame integrally comprises a connection frame having a projecting portion. A drive circuit board connected to the liquid crystal display panel is opposed to the surface light source unit. The drive circuit board has a first end screwed to the frame and a second end having an engaging projection. The engaging projection is attached to the frame by engaging the projecting portion of the frame.

Claims

1. A flat display device comprising:

a substantially rectangular flat display panel having an effective display region;

a substantially rectangular surface light source unit opposed to the flat display panel;

a substantially rectangular frame carrying the flat display panel and the surface light source unit thereon, the frame having a projecting portion;

a bezel in the form of a substantially rectangular frame having an opening corresponding to the effective display region of the flat display panel and attached to the frame so that the display panel and the surface light source unit are held between the frame and the bezel; and

a drive circuit board electrically connected to the flat display panel and opposed to the surface light source unit to supply signals for driving the flat display panel, the drive circuit board including a first end located adjacent to a side wall of the frame, and a second end located at an intermediate portion of the frame and having an engaging portion which is held in engagement with the projecting portion.

2. A flat display device according to claim 1, wherein the projecting portion of the frame extends substantially parallel with the surface light source unit, and the engaging portion of the drive circuit board has an engaging projection inserted between the projecting portion of the frame and the surface light source unit.

3. A flat display device according to claim 2, wherein the engaging projection of the drive circuit board extends substantially parallel with the surface light source unit.

4. A flat display device according to claim 1, wherein the projecting portion of the frame includes an engaging projection extending in a direction perpendicular to the surface light source unit, and

the engaging portion of the drive circuit board has an engagement groove into which the projecting portion of the frame is fitted.

5. A flat display device according to claim 1, wherein the first end of the drive circuit board is screwed to the frame and the bezel.

6. A flat display device according to claim 1, wherein the first end of the drive circuit board is screwed to the frame and the bezel and is ground-connected to the bezel.

7. A flat display device according to claim 1, wherein the frame is formed in a shape of a rectangular frame and integrally comprises a connection frame extending between two opposed sides, and the projecting portion extends from the connection frame.

8. A flat display device comprising:

a substantially rectangular flat display panel having an effective display region;

a substantially rectangular surface light source unit opposed to the flat display panel;

a substantially rectangular frame carrying the flat display panel and the surface light source unit thereon, the frame integrally including a connection frame extending between two opposed sides, and a projecting portion extending from the connection frame;

a bezel in the form of a substantially rectangular frame having an opening corresponding to the effective display region of the flat display panel and attached to the frame so that the display panel and the surface light source unit are held between the frame and the bezel; and

a drive circuit board electrically connected to the flat display panel and opposed to the surface light source unit to supply signals for driving the flat display panel, the drive circuit board having an engaging portion held in engagement with the projecting portion.

9. A flat display device according to claim 8, wherein the drive circuit board has a first end located adjacent to a side wall of the frame, and a second end located at an intermediate portion of the frame and having the engaging portion.

10. A flat display device according to claim 8, wherein the projecting portion of the frame extends substantially parallel with the surface light source unit, and the engaging portion of the drive circuit board has an engaging projection inserted between the projecting portion of the frame and the surface light source unit.

11. A flat display device according to claim 10, wherein the engaging projection of the drive circuit board extends substantially parallel with the surface light source unit.

12. A flat display device according to claim 8, wherein the projecting portion of the frame includes an engaging projection extending in a direction perpendicular to the surface light source unit, and

the engaging portion of the drive circuit board has an engagement groove into which the projecting portion of the frame is fitted.

13. A flat display device according to claim 8, wherein the first end of the drive circuit board is screwed to the frame and the bezel.

14. A flat display device according to claim 8, wherein the first end of the drive circuit board is screwed to the frame and the bezel and is ground-connected to the bezel.