Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1990-05-15
1991-10-01
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358 21R, 358216, 358215, 358209, H04N 336, H04N 5253
Patent
active
050538748
ABSTRACT:
The converter comprises a pick-up device (PD) for picking up a negative (PH), a picture signal processing circuit (PC) for obtaining a picture signal via a signal inversion (IN) and fixing at a black level and a white level, which signal is suitable for display on a television display screen (TVD), and a time signal generator (TG) for supplying at least one adjusting signal (WS) to a black level adjusting circuit (BA). To realize a simple adjustment, the negative (PH) can be picked up by a sensor (FT) in the converter with a picture content part (PP) and beyond it a bright part (WP) by way of a sequential or simultaneous pick-up, respectively, while the sensor (FT) has a black level reference member (BR). Essential is the use of the adjusting gate signal (WS) for the black level adjusting circuit (BA) when the said bright part (WP) is being picked up.
REFERENCES:
patent: 4635101 (1987-01-01), Nakayama
patent: 4786969 (1988-11-01), Shouji
patent: 4811101 (1989-03-01), Yagi
patent: 4912558 (1990-03-01), Easterly et al.
patent: 4922330 (1990-05-01), Saito et al.
Britton Howard W.
Ho Tuan V.
Marion Michael E.
U.S. Philips Corporation
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