Backlight apparatus, and a liquid crystal display (LCD) therewith

• US 7,261,434 B2
• Filed: 09/16/2005
• Issued: 08/28/2007
• Est. Priority Date: 12/28/2001
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Miyamoto, Hirofumi
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US11/228,994
• Publication Number:
  US 20060061706A1
• Time in Patent Office: 711 Days
• Field of Search: 362/218, 362/580, 362/611, 362/614, 362630-634, 362/294, 362/373, 349/70, 349/161
• US Class Current: 362/218
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0071 with elongated shape, e.g. tube
• 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 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

Dissipation of heat generated by a luminescent source, such as a fluorescent lamp, of a backlight apparatus and an LCD therewith is enhanced by providing a proximity section in a holder, making the hottest part the closest to the holder for efficient heat conduction.

Claims

1. A backlight apparatus of an edge light type, comprising:

at least one luminescent source having an electrode section for conducting electric current,

a light guide board to which the luminescent sources transmit light,

a holder in which the luminescent source is installed,

a supporting component secured to the electrode section of the luminescent source for supporting the luminescent source in the holder, and

a heat-dissipating component thermally connected to the holder and located between the supporting component and the light guide board.

2. The backlight apparatus as claimed in claim 1, wherein the heat-dissipating component is formed in one body with the holder.

3. The backlight apparatus as claimed in claim 1, wherein the heat-dissipating component is attachable to and detachable from the holder, having a clip structure.

4. A liquid crystal display apparatus, comprising:

a liquid crystal panel, and

the backlight apparatus as claimed in claim 1, wherein the luminescent source is provided on a side of the light guide board.