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. 30, 2010
Filed:
Oct. 07, 2004
Katsuyuki Arimoto, Okayama, JP;
Takahiro Kobayashi, Okayama, JP;
Yoshihito Ohta, Okayama, JP;
Keizo Matsumoto, Akaiwa, JP;
Katsuyuki Arimoto, Okayama, JP;
Takahiro Kobayashi, Okayama, JP;
Yoshihito Ohta, Okayama, JP;
Keizo Matsumoto, Akaiwa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Gamma converter circuits use first to third types of first and second gamma-characteristics to gamma-convert an input video signal. Selectors select one pair among three pairs of gamma-characteristics in accordance with a transmittance to be used for display, and selects one of the six gamma corrected outputs such that both a distribution area ratio of pixels driven by the video signal as gamma corrected by use of the first gamma-characteristic of the selected pair of gamma characteristics and a distribution area ratio of pixels driven by the video signal as γ corrected by use of the second gamma-characteristic of the selected pair of gamma-characteristics are equal to a distribution area ratio specified in advance for the selected pair of gamma-characteristics.