Television – Image signal processing circuitry specific to television – Brightness control
Patent
1994-02-08
1995-05-16
Groody, James J.
Television
Image signal processing circuitry specific to television
Brightness control
348678, 348706, 348728, H04N 557
Patent
active
054165342
ABSTRACT:
In a monitor apparatus for a television system, a dynamic range of a brightness level of an image quality is widened, and an image very similar to a picture of a movie film is represented on the monitor apparatus. With employment of the YM function for performing the half blanking process by controlling the gain of the video processor, for instance, when an image quality mode such as "theater" mode is selected, the video processor outputs such a control signal that the overall picture period becomes an H level (namely, YM function is turned ON). In the video processor into which such a control signal is inputted, the gain control is carried out. The video signal outputted from the video processor owns such a waveform that the half blanking process has been executed over the entire picture period. The brightness of the overall image can be lowered by this YM function.
REFERENCES:
patent: 4549217 (1985-10-01), Sendelweck
patent: 4706108 (1987-11-01), Kumagai
patent: 5103314 (1992-04-01), Keenan
patent: 5115316 (1992-05-01), Gurley
patent: 5212553 (1993-05-01), Maruoka
patent: 5257106 (1993-10-01), Maruoka
Hayashi Toshihide
Shirato Keiji
Groody James J.
Hsia Sherrie
Miller Jerry A.
Sony Corporation
Toto Peter C.
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