Quality assessment device

Details Quality assessment device Quality assessment device

1997-02-19

1999-10-26

Metjahic, Safet

Photography

Camera combined with or convertible to diverse art device

349 33, G03B 1900

Patent

active

059742755

ABSTRACT:
A quality assessment device provided in an electro-developing type camera th an electro-developing recording medium, to sense a resistant value of an electrostatic information recording medium provided in an electro-developing recording medium. A dark current sensing resistor is connected in series to the electrostatic information recording medium. A voltage sensing unit is connected in parallel to the dark current sensing resistor to sense a voltage generated therein. When the release switch is turned ON, a switch of a dark current sensing circuit, which includes the dark current sensing resistor and the voltage sensing unit is closed. After a predetermined time has elapsed, the dark current flowing in the dark current sensing resistor is sensed. If the dark current is greater than a threshold value, it is deemed that the electrostatic information recording medium has deteriorated.

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patent: 5315410 (1994-05-01), Takanshi et al.
patent: 5408341 (1995-04-01), Takanashi et al.
patent: 5424156 (1995-06-01), Aoki et al.
patent: 5514504 (1996-05-01), Iijima et al.
patent: 5555205 (1996-09-01), Okabe
patent: 5587987 (1996-12-01), Okabe

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