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:
Nov. 06, 2012
Filed:
Feb. 14, 2008
Mitsuru Hosoki, Osaka, JP;
Mitsuru Hosoki, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
One embodiment of the present invention discloses: a backlight lamp lighting control device including: a PWM signal generating section for generating a PWM signal in accordance with a duty ratio externally inputted, and outputting the PWM signal to a PWM inverter section controlled by the PWM signal so as to drive a fluorescent lamp to light; and a tube current detecting section for detecting a current flowing in the fluorescent lamp, the PWM signal generating section generating the PWM signal based on a current, which is obtained by adjusting the current detected by the tube current detecting section in accordance with the duty ratio externally inputted, so that luminance displayed on a liquid crystal display panel will be substantially uniform over the entire liquid crystal display panel.