Liquid crystal display device having a back frame which includes a contacted portion with the liquid crystal panel

• US 6,721,021 B2
• Filed: 08/27/2002
• Issued: 04/13/2004
• Est. Priority Date: 07/05/1999
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Kabushiki Kaisha Advanced Display
• Inventors: Hayasaki, Hiroshige, Sakamoto, Takuya
• Primary Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US10/228,092
• Publication Number:
  US 20020196384A1
• Time in Patent Office: 595 Days
• Field of Search: 349/58, 349/62, 349/63, 349/65, 349/113, 362/31, 362/84, 362/216, 362/561
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0023 provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

A liquid crystal display device is constructed by arranging, on the back of a liquid crystal panel 1 for displaying an image, an optical guide plate unit 5 constructed to irradiate the whole surface of the liquid crystal panel 1 with a light coming from a lamp unit 2 and reflected by a lamp reflector 3; by positioning the liquid crystal panel 1 in contact with a liquid crystal panel receiving portion 8 which is rounded by folding back a lamp cover 4 constructed to cover the lamp unit 2; and by supporting and fixing the liquid crystal panel 1 and the optical guide plate unit 5 by a front frame 7 and a back frame 6.

Claims

1. A liquid crystal display device comprising:

a liquid crystal panel for displaying an image;

a lamp unit for providing a light source for said liquid crystal panel;

an optical guide plate unit arranged on the back of said liquid crystal panel for irradiating said liquid crystal panel with a light outputted from said lamp unit;

a back frame constructed to support said optical guide plate unit and to cover said lamp unit and having a contacted portion with said liquid crystal panel; and

a front frame constructed to support said liquid crystal panel,

wherein the contacted portion of said back frame with said liquid crystal panel is curved.

2. A liquid crystal display device according to claim 1, wherein the contacted portion of said back frame with said liquid crystal panel is arranged to position said liquid crystal panel.

3. A liquid crystal display device according to claim 1, wherein said contacted portion contacts a side surface of said liquid crystal panel.

4. A liquid crystal display device comprising:

a liquid crystal panel for displaying an image;

a lamp unit for providing a light source for said liquid crystal panel;

an optical guide plate unit arranged on the back of said liquid crystal panel for irradiating said liquid crystal panel with a light outputted from said lamp unit;

a back frame constructed to support said optical guide plate unit and to cover said lamp unit and having a contacted portion with a side surface of said liquid crystal panel; and

a front frame constructed to support said liquid crystal panel,

wherein the contacted portion of said back frame with said liquid crystal panel is formed by folding back said back frame.

5. A liquid crystal display device according to claim 4, wherein the contacted portion of said back frame with said liquid crystal panel is arranged to position said liquid crystal panel.

6. A liquid crystal display device according to claim 4, wherein the contacted portion of said back frame with said liquid crystal panel is curved.

7. A liquid crystal display device according to claim 4, wherein the contacted portion of said back frame with said liquid crystal panel is formed by folding back said back frame at an angle over 90 degrees.

8. A liquid crystal display device according to claim 4, wherein the contacted portion of said back frame with said liquid crystal panel is formed by folding back said back frame stepwise.

9. A liquid crystal display device according to claim 4, wherein the contacted portion of said back frame with said liquid crystal panel is formed by folding said back frame at a right angle.

10. A liquid crystal display device according to claim 4, wherein said front frame is coupled to a surface of said back frame.

11. A liquid crystal display device according to claim 4, wherein said front frame is coupled to a surface of said back frame and a surface of said liquid crystal panel.

12. A liquid crystal display device according to claim 4, wherein said back frame includes a top wall and a bottom wall having said lamp unit positioned therebetween, and a side wall connecting the top wall and bottom wall, wherein said contacted portion is formed by folding back said top wall.