Flat-type light source apparatus, liquid crystal display apparatus using the same, and method of inspecting the liquid crystal display

• US 20030071933A1
• Filed: 07/23/2002
• Published: 04/17/2003
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Advanced Display Technologies
• Inventors: Ohta, Hisashi, Teramoto, Kenji, Monden, Takuya
• Granted Patent: US 7,405,797 B2
• Time in Patent Office: Days
• US Class Current: 349/61
• CPC Class Codes: G02F 1/1309 Repairing; Testing
• CPC Class Codes: G02F 1/1336 Illuminating devices

Abstract

A lamp lighting terminal 4 which is a conductive pad connected to a power supply terminal of a lamp is mounted on a surface opposite to a light emitting surface of a flat-type light source apparatus 3. Then, a terminal of a inspection device 16 is brought into contact with the lamp lighting terminal 4 to light up a liquid crystal display apparatus, thereby allowing inspection to be carried out. The flat-type light source apparatus 3 may be provided with a light guide 9 inputting lights from a light source through the side to output the light through one surface. In this configuration, inspection work at the time of lighting inspection of a liquid crystal display is simplified, and a high-quality liquid crystal display can be obtained.

Claims

1. A flat-type light source apparatus, comprising:

light emitting means for outputting lights from a light source through a first surface;

housing means for containing said light source; and

a conductive pad which is connected to a power supply terminal of said light source and mounted on a second surface which is other than said first surface.

2. A flat-type light source apparatus according to claim 1, wherein said conductive pad is mounted on said second surface opposite to said first surface.

3. A flat-type light source apparatus according to claim 1, wherein said light emitting means has a light guide which inputs lights from said light source through the side to output said light through one surface.

4. A flat-type light source apparatus according to claim 3, wherein said light source is mounted close to at least one side of said light guide.

5. A liquid crystal display apparatus, comprising:

one of the flat-type light source apparatus according to claim 1;

and

a liquid crystal panel with liquid crystal filled between two insulting substrates facing each other which is located on one surface of said flat-type light source apparatus.

6. A method of inspecting a liquid crystal display apparatus, wherein said light source is lit up by bringing a power supply terminal of an inspection device into contact with a conductive pad mounted on a surface other than a surface of said flat-type light source apparatus in the liquid crystal display apparatus according to claim 5.