Image forming system using digital ASIC and analog ASIC for proc

Details Image forming system using digital ASIC and analog ASIC for proc Image forming system using digital ASIC and analog ASIC for proc

1997-05-23

1998-07-21

Le, N.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

358296, B41J 2385, G03G 1304, H04N 121

Patent

active

057840911

ABSTRACT:
A digital ASIC inputs pixel data thereto and an analog ASIC inputs the output signal of the digital ASIC thereto. A combination of the digital ASIC and the analog ASIC controls a semiconductor laser so as to pulse-width-modulate and amplitude-modulate the light emitted by the semiconductor laser that may be pulse-width-modulated and amplitude-modulated. The digital ASIC comprises a reference pulse generator having delay time control unit and a pulse width generator for generating a plurality of different pulse widths using pulses having a plurality of phases generated by the reference pulse generator. The analog ASIC comprises control/modulation unit for controlling the semiconductor laser so as to pulse-width-modulate and amplitude-modulate the light emitted by the semiconductor laser using the plurality of different pulse widths generated by the pulse width generator. The reference pulse generator comprises an oscillator comprising combined multiple delay-time control unit, and control unit for controlling the oscillator so as to make the frequency supplied by the oscillator identical to the clock of the pixel data.

REFERENCES:
patent: 5036519 (1991-07-01), Ema et al.
patent: 5050177 (1991-09-01), Ema
patent: 5138623 (1992-08-01), Ema et al.
patent: 5237579 (1993-08-01), Ema et al.
patent: 5258780 (1993-11-01), Ema et al.

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