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:
Mar. 31, 2009
Filed:
Oct. 13, 2005
Yasuyuki Kudo, Kamakura, JP;
Akihito Akai, Yokohama, JP;
Kazuo Ookado, Kokubunji, JP;
Kazunari Kurokawa, Mobara, JP;
Hiroki Aizawa, Chigasaki, JP;
Yasuyuki Kudo, Kamakura, JP;
Akihito Akai, Yokohama, JP;
Kazuo Ookado, Kokubunji, JP;
Kazunari Kurokawa, Mobara, JP;
Hiroki Aizawa, Chigasaki, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A display driver adjustable for a gamma specification of a liquid display panel, including: a system interface receiving display data from an external; a memory storing the display data; a grayscale voltage generator generating a plurality of grayscale voltages; a gamma adjusting circuit adjusting the gamma specification; and an output circuit outputting the grayscale voltage in response to the display data from the memory to the liquid display panel, wherein the gamma adjusting circuit includes: a gradient adjustment register controlling variable resistors of a ladder resistor; an amplitude/reference adjustment register; and a micro adjustment register, wherein the gradient adjustment register, the amplitude/reference adjustment register and micro adjustment register, are independently set in accordance with red, green and blue, respectively.