The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2012
Filed:
May. 13, 2009
Takahiro Kobayashi, Okayama, JP;
Yuichi Nishikoji, Kyoto, JP;
Takahiro Kobayashi, Okayama, JP;
Yuichi Nishikoji, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A backlight apparatus is provided that enables a balance of brightness to be maintained and long life to be achieved over the entire area of a display screen. Light guide platehas upper end surfaceand lower end surfaceas inputting surfaces, and principal surfaceas an outputting surface opposite the rear surface of liquid crystal panel. LEDsandare placed in proximity to upper end surfaceand lower end surface. LED drive circuitssupply LEDsandwith a current that causes LEDsandto emit light that illuminates liquid crystal panelvia light guide plate. LED drive circuitssupply a lower current to LEDsandplaced in proximity to a part having a higher ambient temperature within upper end surfaceand lower end surface