Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-01-25
1987-03-10
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
340793, H04N 315, H04N 570
Patent
active
046494324
ABSTRACT:
A video display system is disclosed, which includes a display device including a plurality of display cells arranged in an X-Y matrix form, a video signal source for supplying a digital video signal, a pulse width modulator connected to the video signal source for deriving a PWM signal corresponding to the brightness level of the digital video signal, the pulse width modulator including a counter supplied with the digital video signal as a datum signal and a clock signal generator for supplying a clock signal to the counter, and a signal supplying circuit connected to the pulse width modulator for supplying the PWM signal to the display device and reproducing a picture thereon. In this case, the video display system of this invention further includes a control circuit connected to the clock signal generator for changing the frequency of the clock signal supplied to the counter and controlling the brightness of the picture reproduced on the display device.
REFERENCES:
patent: 3838209 (1974-09-01), Tsuchiya et al.
patent: 4340889 (1982-07-01), Knight et al.
patent: 4353062 (1982-10-01), Lorteije et al.
patent: 4516118 (1985-05-01), Wahlquist
patent: 4554539 (1985-11-01), Graves
patent: 4591902 (1986-05-01), Masubuchi
Endoh Yasuyuki
Watanabe Yuji
Masinick Michael A.
Sony Corporation
Toth E. Anne
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