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Patent Searching and Data


Title:
LIGHT SOURCE DRIVE CIRCUIT, BACK LIGHT SOURCE DEVICE, AND LIQUID CRYSTAL DISPLAY
Document Type and Number:
Japanese Patent JP2009059835
Kind Code:
A
Abstract:

To obtain a light source drive circuit that can minimize the reduction in quality, such as a luminance reduction and display defects in the case of LED fault occurrence and enables reduction in the manufacturing cost.

The light source drive circuit 30 includes a plurality of series-connected light-emitting elements 1a to 1e and Zener diodes 2a to 2e which are connected in antiparallel with the light-emitting elements 1a to 1e; and if one of the plurality of light-emitting elements 1a to 1e fails, a Zener diode connected in antiparallel to the light-emitting element having failed breaks down to make a current bypass it.


Inventors:
Ito, Hiroyasu
Application Number:
JP2007000225016
Publication Date:
March 19, 2009
Filing Date:
August 31, 2007
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
F21S2/00; F21V8/00; F21V25/02; G02F1/13357; H01L33/00; H05B37/02; F21Y101/02
Attorney, Agent or Firm:
吉竹 英俊
有田 貴弘