Method and apparatus for controlling brightness of image...

Details Method and apparatus for controlling brightness of image... Method and apparatus for controlling brightness of image...

2006-09-05

2006-09-05

Lee, Michael H. (Department: 2622)

Television

Image signal processing circuitry specific to television

Brightness control

C348S691000, C348S673000, C348S689000

Reexamination Certificate

active

07102698

ABSTRACT:
A method and apparatus for controlling the brightness of an image processing device to improve a brightness characteristic of an image signal, by reducing a pedestal voltage range and correspondingly expanding a brightness control voltage range in a highlight mode. The brightness control method includes the operations of determining whether a highlight mode is enabled; and if the highlight mode is enabled, reducing a pedestal voltage range by a first predetermined value and expanding a brightness control voltage range by a second predetermined value. The pedestal driving voltage and the brightness control voltage can be reciprocally controlled without modifications to a circuit having limited amplification, and the brightness can be improved without saturating an image in a highlight mode.

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