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:
Sep. 21, 2004
Filed:
Jan. 09, 2001
Taro Funamoto, Ibaraki, JP;
Wataru Machidori, Amagasaki, JP;
Takahiro Kobayashi, Okayama, JP;
Yoshihito Ota, Okayama, JP;
Katsuyuki Arimoto, Okayama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Provided are an image display apparatus and method capable of visually improving a sense of contrast by adjusting contrast and a light source to have correlation. A characteristics detection part detects MAX, MIN, and APL of an input signal. A control data generation part calculates Gain for amplifying a difference between MAX and MIN to a width of a dynamic range and Offset indicating the DC level to be shifted so that the input video signal amplified by Gain falls with in the output dynamic range of a DC level adjustment part B. A signal amplitude adjustment part A amplifies the input video signal with reference to APL and in accordance with Gain. The DC level adjustment part B shifts the DC level of the amplified input video signal in accordance with a value of Offset. A light source control part controls a light source so that a visual brightness level on a screen is equal to a brightness level of the input video signal.