TELEVISION AND ELECTRONIC APPARATUS

• US 20120162546A1
• Filed: 10/21/2011
• Published: 06/28/2012
• Est. Priority Date: 12/27/2010
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Shimomichi, Tsuyoshi
• Application Number:
  US13/279,106
• Publication Number:
  US 20120162546A1
• Time in Patent Office: Days
• US Class Current: 348/794
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• 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 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: H04N 5/645 Mounting of picture tube on chassis or in housing
• CPC Class Codes: H04N 5/655 Construction or mounting of chassis, e.g. for varying the elevation of the tube

Abstract

According to one embodiment, an electronic apparatus includes a rectangular liquid crystal panel, a light-guide plate, a light bar corresponding a short side of the liquid crystal panel and including a plurality of light-emitting diodes, a reflector on the light-guide plate, a prism sheet on the light-guide plate on a side opposite to the reflector, and a polarizing sheet on the prism sheet configured to diffuse light.

Claims

1. A television comprising:

a rectangular liquid crystal panel configured to allow writing of images to progress from a first long side toward a second long side of the liquid crystal panel;

a rectangular light-guide plate;

a pair of light bars along short sides of the light-guide plate, respectively, extending in the direction of progress of writing of images, each of the light bars comprising a circuit board and a plurality of light-emitting diodes arranged in the direction of progress of writing of images;

a reflector on the light-guide plate;

a prism sheet on the light-guide plate on a side opposite the reflector; and

a polarizing sheet on the prism sheet,

wherein the plurality of light-emitting diodes are divided into a plurality of groups in the direction of progress of writing of images, the circuit board comprises electrical interconnections individually connected to the groups, respectively, and each of the groups are configured to light in synchronization with the progression of the writing of images, and

the circuit board comprises a metal base and a plurality of conductor layers, and the electrical interconnections are divided into the plurality of conductor layers.

2. The television of claim 1,

wherein the circuit board comprises a surface configured to support at least some of the plurality of light-emitting diodes, the surface being configured to face a side surface of the light-guide plate.

3. The television of claim 2, further comprising:

a backlight unit comprising the light-guide plate, the reflector, the prism sheet, and the polarizing sheet,

wherein a width in a lateral direction of the circuit board is smaller than a thickness of the backlight unit.

4. The television of claim 3, further comprising:

a metal frame configured to face the side surface of the light-guide plate,

wherein at least one of the light bars is configured to be attached to the metal frame and thermally connected to the metal frame.

5. The television of claim 4, further comprising:

a back cover configured to cover the backlight unit and be outwardly exposed,

wherein the metal frame comprises a first portion configured to hold the backlight unit between the metal frame and the back cover, and a second portion configured to face a side surface of the backlight unit, and

at least one of the light bars is configured to be attached to the second portion of the metal frame.

6. The television of claim 5,

wherein the back cover is metallic, and

the metal frame is configured to be thermally connected to the back cover.

7. The television of claim 6, further comprising:

a metal front cover configured to cover an edge portion of the liquid crystal panel, be exposed to the outside of the television, hold the liquid crystal panel between the metal frame and the front cover, and be thermally connected the metal frame.

8. An electronic apparatus comprising:

a rectangular liquid crystal panel;

a light-guide plate;

a light bar corresponding to a short side of the liquid crystal panel and comprising a plurality of light-emitting diodes;

a reflector on the light-guide plate;

a prism sheet on the light-guide plate on a side opposite to the reflector; and

a polarizing sheet on the prism sheet configured to diffuse light.

9. The electronic apparatus of claim 8,

wherein, the liquid crystal panel is configured to allow writing of images to progress from a first long side toward a second long side of the liquid crystal panel, and

the plurality of light-emitting diodes are arranged in the direction of progress of writing of images.

10. The electronic apparatus of claim 9,

wherein the plurality of light-emitting diodes are divided into a plurality of groups in the direction of progress of writing of images, each of the groups being configured to light in synchronization with the progression of the writing of images.