Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2006-12-26
2006-12-26
Ometz, David (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S645000, C348S684000, C348S692000
Reexamination Certificate
active
07154563
ABSTRACT:
A brightness limitation system is employed in a television circuit to prevent the black reference voltage level and the video signal from entering a minimum signal clipping zone, to provide precise correction signal, limiting the brightness, to maintain a constant black reference voltage level, and maintain a video signal with dynamic amplitude. The brightness limitation circuit detects a minimum signal level amongst the black reference signals from each color channel and compares the minimum signal with a fixed voltage level to generate a brightness feedback signal. The brightness feedback signal is then used to modify the black reference signal level for each color channel.
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Ochi Shigeharu
Ogawa Takao
Takeda Ryo
Tange Takeshi
Jorgenson Lisa K.
Ometz David
Seed IP Law Group PLLC
STMicroelectronics Asia Pacific (Pte) Ltd.
Tarleton E. Russell
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