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Generated: July 22, 2017

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Details for Patent: 7,907,135

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Summary for Patent: 7,907,135

Title:Image display and image displaying method for gradation correction
Abstract: A projector 1 detects a luminance distribution in an effective video period of an inputted video luminance signal, and a coefficient calculating circuit 302 calculates a correction coefficient C.sub.i to correct a gradation (FIG. 6A). Then, surrounding brightness is detected, and the correction coefficient C.sub.i is adjusted based on the surrounding brightness to obtain an adjusted correction coefficient C.sub.i' (FIG. 6B). As shown in FIG. 6C, a luminance can be raised to Q according to a brightness signal even for a pixel of a lowest input luminance by adjusting the correction coefficient. Other correction coefficients in a range of 0 to 255 before adjustment are proportionally distributed to a range of 0 to 255-Q, and added with a correction coefficient Q. A luminance of each pixel which belongs to the effective video period of the video luminance signal is adjusted using the adjusted correction coefficient.
Inventor(s): Kuwabara; Akihiro (Nara, JP), Kimoto; Takayuki (Osaka, JP), Seki; Yoshio (Osaka, JP)
Assignee: Panasonic Corporation (Osaka, JP)
Application Number:11/721,965
Patent Claim Types:
see list of patent claims
Device; Use;

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Foreign Priority and PCT Information for Patent: 7,907,135

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2005-095740Mar 29, 2005
PCT Information
PCT FiledFebruary 28, 2006PCT Application Number:PCT/JP2006/303802
PCT Publication Date:October 05, 2006PCT Publication Number: WO2006/103862

International Patent Family for Patent: 7,907,135

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Japan4950031► Subscribe
European Patent Office1865709► Subscribe
China100493142► Subscribe
China101151886► Subscribe
World Intellectual Property Organization (WIPO)2006103862► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving 500+ biopharmaceutical companies globally:

UBS
Harvard Business School
Argus Health
Cantor Fitzgerald
Healthtrust
Chinese Patent Office
Dow
US Department of Justice
Johnson and Johnson
Farmers Insurance

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