Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2005-10-28
2008-08-19
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S690000
Reexamination Certificate
active
07414622
ABSTRACT:
An image data processing circuit includes a first circuit for calculating an average picture level value of the image data, a multiplier for multiplying a coefficient by the image data, a second circuit for calculating a first coefficient for the multiplier based upon the average picture level value, and a third circuit for calculating a second coefficient for the multiplier. The second coefficient is calculated so that the result of multiplying (1) image data having a value over an input range of a circuit to which data from the multiplier is inputted, and (2) the second coefficient falls in the input range. In addition, a selection circuit selects the coefficient to be used in the multiplier from the first coefficient calculated by the second circuit and the second coefficient calculated by the third circuit.
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Abe Naoto
Ikeda Takeshi
Inamura Kohei
Sagano Osamu
Saito Hiroshi
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Hjerpe Richard
Said Mansour M
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