Title:
DRIVE CIRCUIT OF LASER ARRAY
Document Type and Number:
Japanese Patent JP3203071
Kind Code:
B2
Abstract:
PURPOSE: To simplify the drive circuit of a laser array provided with a plurality of laser diodes whose optical output is different from each other.
CONSTITUTION: One laser diode LD0 out of a plurality of laser diodes LD0, LD1, LD2,..., LDN is controlled in such a way that its optical output becomes definite, and a current detection part DET which detects its driving current I1 is installed in a drive part APC which drives it. Its output is given to a subtraction part which respectively subtracts voltages Vc1, Vc2,..., VcN set by variable resistances VR1, VR2,..., VRN. The title drive circuit is provided with a current supply part ACC which gives a driving current to laser diodes LD1, LD2,..., LDN according to the output voltage of the subtraction part. When a temperature is changed, it is sufficient to drive all the laser diodes LD0, LD1, LD2,..., LDN by a current which has been changed by the same amount.
Inventors:
Yasuaki Inoue
Kimihide Mizuguchi
Yasuyuki Bessho
Kimihide Mizuguchi
Yasuyuki Bessho
Application Number:
JP31055892A
Publication Date:
August 27, 2001
Filing Date:
November 19, 1992
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01S5/042; H01S5/0683; (IPC1-7): H01S5/0683
Domestic Patent References:
| JP4320076A | ||||
| JP336778A | ||||
| JP529688A | ||||
| JP3108388A |
Attorney, Agent or Firm:
Norio Kawano