Liquid crystal display apparatus and electronic equipment

• US 20050088586A1
• Filed: 10/27/2004
• Published: 04/28/2005
• Est. Priority Date: 10/28/2003
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Sakamoto, Takuya, Mori, Akihiro
• Granted Patent: US 7,742,121 B2
• Time in Patent Office: Days
• US Class Current: 349/62
• 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 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 2203/68 Green display, e.g. recycling, reduction of harmful substances

Abstract

In a liquid crystal display apparatus, it is a liquid crystal display apparatus comprising a liquid crystal panel for forming an image by a video signal from the outside, a light source substrate comprising at least one point-like light source, and a cabinet to which the light source substrate is attached, and light emitted from the point-like light source illuminates the liquid crystal panel and the light source substrate is constructed detachably from the outside of the cabinet in a direction of a surface opposite to a display surface of the liquid crystal panel and thereby the light source substrate is constructed detachably without disassembling the liquid crystal display apparatus.

Claims

1. A liquid crystal display apparatus comprising:

a liquid crystal panel for forming an image by a video signal from the outside;

at least one point-like light source for applying light to the liquid crystal panel;

a light source substrate for mounting the point-like light source; and

a cabinet for holding the liquid crystal panel, characterized in that the light source substrate is attached from the outside to the backside of a surface of the cabinet opposed to a surface opposite to a display surface of the liquid crystal panel and is detachable from the outside.

5. A liquid crystal display apparatus according to claim 1,

wherein the light source substrate is made of material including metal.

6. A liquid crystal display apparatus according to claim 1,

wherein a circuit pattern on the light source substrate is present in only a portion other than a contact portion with the cabinet.

7. A liquid crystal display apparatus according to claim 1,

wherein the light source substrate is attached to the cabinet through electrical insulating material or material with good thermal conductivity.

8. A liquid crystal display apparatus according to claim 1,

wherein the light source substrate is attached to the cabinet through a plate-shaped member.

9. A liquid crystal display apparatus according to claim 8,

wherein the plate-shaped member is made of material including metal.

10. A liquid crystal display apparatus according to claim 8,

wherein a circuit pattern on the light source substrate is present in only a portion other than a contact portion with the plate-shaped member.

11. A liquid crystal display apparatus according to claim 8,

wherein the light source substrate is attached to the plate-shaped member through electrical insulating material or material with good thermal conductivity.

12. A liquid crystal display apparatus according to claim 1,

wherein the point-like light source is an LED.

13. An electronic equipment comprising the liquid crystal display apparatus according to claim 1.

14. An electronic equipment according to claim 13, further comprising:

a mechanism temporarily opening an outer surface of a place corresponding to a position of at least the light source substrate in electronic equipment in which the liquid crystal display apparatus is incorporated into the inside.

2. A liquid crystal display apparatus comprising:

a liquid crystal panel for forming an image by a video signal from the outside;

at least one point-like light source;

a light source substrate for mounting the point-like light source;

an optical waveguide for guiding light emitted from the point-like light source to the liquid crystal panel; and

a cabinet for holding the liquid crystal panel and the optical waveguide, characterized in that the light source substrate is attached from the outside to the backside of a surface of the cabinet opposed to a surface opposite to a display surface of the liquid crystal panel and is detachable from the outside.

3. A liquid crystal display apparatus according to claim 2,

wherein the optical waveguide has a recess or a through hole and the point-like light source is received in said recess or said through hole.

4. A liquid crystal display apparatus according to claim 3,

wherein the recess or the through hole is arranged in alignment along at least one side of the optical waveguide.