Control circuit for a laser printer

Details Control circuit for a laser printer Control circuit for a laser printer

1988-08-16

1989-09-19

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346108, 372 26, 372 38, H04N 123, G01D 942, H01S 300, H01S 310

Patent

active

048686751

ABSTRACT:
A control circuit for a laser printer is described which utilizes a laser switching amplifier for supplying current to a laser diode, the latter being modulated by means of image signals. The control circuit has a correction circuit which compensates for the turn-on delay time of the laser diode. Preferably, the correction circuit lengthens the incoming image signal which controls the laser diode by a correction time which substantially corresponds to the time that elapses between when current is supplied to the laser diode and when the laser diode delivers its light, thereby eliminating distortion of the final image.

REFERENCES:
patent: 4612555 (1986-09-01), Hongou
Transactions of the IECE of Japan, vol. E 65, No. 10, Oct. 1982 (pp. 584-585) "Direct FM Color Video Signal Recording With Diode Lasers".
NTG-Fachberichte, vol. 59, Third European Conference on Optical Communication, Conference Proceedings 14-16 Sep. 1977 (pp. 208-210), "Laser Automatic Level Control Circuits for Optical Communications Systems".

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