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. 15, 2002
Filed:
Dec. 27, 1999
Sony Corporation, Tokyo, JP;
Abstract
In an apparatus equipped with a display panel having displayed thereon an image of a video signal input thereto and a backlight for use for the display panel, there are provided a level-setting means ( ) for outputting a signal having a level corresponding to the adjusting level of brightness of the image displayed on the display panel, a thinning means ( ) for thinning a signal having a periodic waveform at every pseudo random period that has been set in correspondence with an output level of the level-setting means ( ), and a drive means ( ), (Q ) for generating a drive signal for driving the backlight based on an output signal of the thinning means ( ). With this construction, it is arranged to enable the maintenance of an excellent state of display of the image and to enable the adjustment of the brightness of the backlight to be performed over a wide range without generating any noises.