Laser diode driving circuit, semiconductor integrated circuit fo

Details Laser diode driving circuit, semiconductor integrated circuit fo Laser diode driving circuit, semiconductor integrated circuit fo

1997-09-05

1999-06-15

Davie, James W.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

372 29, 372 38, 347129, 347133, H01S 300, H01S 3096, B41J 247

Patent

active

059126949

ABSTRACT:
The present invention relates to a laser diode driving circuit for supplying a drive current to a laser diode, a semiconductor integrated circuit for driving the laser diode, and an image recording apparatus in which a step of executing a scanning on a predetermined member to be scanned with a laser beam holding image information is included in an image recording step. The laser diode is certainly kept in a no light emitting state at a timing when the laser diode should be kept in the no light emitting state and is allowed to emit a laser beam of the light quantity faithfully corresponding to the drive current at a timing when the drive current is supplied to the laser diode. A bias current out of the bias current and a drive current which are supplied to a laser diode 1 is further divided into a first bias current and a second bias current. Normally, only the first bias current is supplied to the laser diode. The second bias current is supplied and stopped in a manner similar to the drive current.

REFERENCES:
patent: 5463410 (1995-10-01), Uchiyama
patent: 5521933 (1996-05-01), Sosa
patent: 5651017 (1997-07-01), Genovese
patent: 5661739 (1997-08-01), Ohashi
patent: 5675599 (1997-10-01), Abe et al.
patent: 5677723 (1997-10-01), Soya et al.
patent: 5748657 (1998-05-01), Gaddis
patent: 5818503 (1998-10-01), Kusano et al.

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