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:
Aug. 14, 2012
Filed:
Feb. 27, 2008
Tetsuya Hamada, Osaka, JP;
Tetsuya Hamada, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A backlight unit that realizes stabilization of lighting operation in the event of carrying out lighting operation at low luminance. The backlight unit is backlight unit () comprising a light source composed of multiple light emitting diode groups () each including a given number of serially connected light emitting diodes (); and lighting circuit () for lighting the light source in accordance with a light control signal. The lighting circuit has at least multiple drive circuit portions () respectively connected to the multiple light emitting diode groups, and in accordance with a light control signal, allows all the light emitting diodes included in each of the multiple light emitting diode groups to emit light, or allows only light emitting diodes included in light emitting diode group(s) selected from among the multiple light emitting diode groups to emit light.