Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-01-11
1990-07-31
Brinich, Stephen
Facsimile and static presentation processing
Facsimile
Recording apparatus
35821331, H04N 314
Patent
active
049454196
ABSTRACT:
The disclosure concerns matrices of photosensitive elements. To avoid the need for a resetting light source using, as a photosensitive dot, a photodiode in series with a capacitor between a row conductor and a column conductor, it is proposed, according to the invention, to provide for a photosensitive dot comprising two diodes (a photosensitive diode and a reading diode) and a capacitor connected to a common floating node. The capacitor is connected to a row-addressing conductor giving a reading pulse to the selected line. The cathode of the reading diode is connected to the column conductor which collects the useful signal; and the anode of the photodiode is connected to a second row conductor (which, besides, may be the first conductor of a neighboring row) which receives a resetting pulse after the reading pulse. In another embodiment, the photodiode is simply connected to a reference voltage source.
REFERENCES:
patent: 3551761 (1970-12-01), Ruoff
patent: 4200892 (1980-04-01), Weimer
patent: 4660095 (1987-04-01), Cannella et al.
patent: 4675739 (1987-06-01), Catchpole et al.
patent: 4714836 (1987-12-01), Kitamura et al.
patent: 4728802 (1988-03-01), Baron
"Thomson-CSF"
Brinich Stephen
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