Laser scanner control circuit which is used in image forming app

Details Laser scanner control circuit which is used in image forming app Laser scanner control circuit which is used in image forming app

1992-03-25

1996-04-02

Wong, Peter S.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347247, 347253, 347261, G01D 942

Patent

active

055045170

ABSTRACT:
A laser scanner control circuit which is used for an apparatus for scanning onto a photo sensitive material by a laser beam and forming an image thereon is constructed as a monolithic driver IC onto a single chip. A reset circuit is provided for a sample-hold circuit so as to minimize the laser power when the image forming apparatus is in a standby mode. A circuit to detect an abnormality of the laser power is further provided. Due to this, the safety of the laser power control of the sample-hold circuit is improved. The operation of the sample-hold circuit can be started at a time point when the laser emitting operation is stable.

REFERENCES:
patent: 4620200 (1986-10-01), Fukai
patent: 4727382 (1988-02-01), Negishi et al.
patent: 4734715 (1988-03-01), Shiraishi
patent: 4761659 (1988-08-01), Negishi
patent: 4862289 (1989-08-01), Shimada
patent: 4908634 (1990-03-01), Arimoto et al.
patent: 4910532 (1990-03-01), Hiraguchi
patent: 4990763 (1991-02-01), Shinada
patent: 5083140 (1992-01-01), Peterson et al.
patent: 5196942 (1993-03-01), Shiau
patent: 5241330 (1993-08-01), Kawabata et al.

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