Image processor, semiconductor integrated circuit, and...

Details Image processor, semiconductor integrated circuit, and... Image processor, semiconductor integrated circuit, and...

2007-12-25

2007-12-25

Natnael, Paulos (Department: 2622)

Television

Image signal processing circuitry specific to television

Brightness control

Reexamination Certificate

active

11016830

ABSTRACT:
An image processor includes a luminance signal processor configured to execute an amplification by utilizing a gain set by a plurality of gain step-sizes including a first gain step-size and a second gain step-size less than the first gain step-size, to an image signal component which is equal to or less than a fixed luminance level in an image signal. The control circuit is configured to control increase and decrease of the gain utilized by the amplification and the gain step-sizes based on a ratio that a luminance level of the image signal component is equal to or less than the reference detection level, a ratio that the luminance level of the image signal component is equal to or less than a first detection level greater than the reference detection level, and a ratio that luminance level of the image signal component is equal to or less than a second detection level less than the reference detection level.

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patent: 6-189158 (1994-07-01), None
U.S. Appl. No. 11/237,858, filed Sep. 29, 2005, Yamagishi et al.

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