JPS5688577A - Output controller of laser printer - Google Patents
Output controller of laser printerInfo
- Publication number
- JPS5688577A JPS5688577A JP16670879A JP16670879A JPS5688577A JP S5688577 A JPS5688577 A JP S5688577A JP 16670879 A JP16670879 A JP 16670879A JP 16670879 A JP16670879 A JP 16670879A JP S5688577 A JPS5688577 A JP S5688577A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- output
- supplied
- peak value
- information signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To eneble to prevent a laser output from fluctuating by controlling an information signal to be supplied to a laser driver on the basis of the variation in the peak value of the laser output.
CONSTITUTION: Gate signal (c) is supplied to gate circuit 12 to supply the output of photodetector 3 to peak holding circuit 13. Peak holding circuit 13 holds and supplies peak value (a) of the output of photodetector 3 to information signal amplifier 11, whose gain is controlled. Gate circuit 14, once supplied with gate signal (b), supplies the output of comparator 5 to laser driver 1 to set and control a direct current to be supplied to semiconductor laser 2. Thus, the magnitude of the information signal to be supplied to laser driver 1 is controlled on the basis of the peak value variation of the laser output to stabilize the laser output. Consequently, even if characteristics fluctuate or vary with elements owing to the secular change of the laser element, the invariably constant laser output can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16670879A JPS5688577A (en) | 1979-12-21 | 1979-12-21 | Output controller of laser printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16670879A JPS5688577A (en) | 1979-12-21 | 1979-12-21 | Output controller of laser printer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5688577A true JPS5688577A (en) | 1981-07-18 |
Family
ID=15836279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16670879A Pending JPS5688577A (en) | 1979-12-21 | 1979-12-21 | Output controller of laser printer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5688577A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4647950A (en) * | 1984-05-07 | 1987-03-03 | Kabushiki Kaisha Toshiba | Recording apparatus |
-
1979
- 1979-12-21 JP JP16670879A patent/JPS5688577A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4647950A (en) * | 1984-05-07 | 1987-03-03 | Kabushiki Kaisha Toshiba | Recording apparatus |
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