JPS62116260U - - Google Patents
Info
- Publication number
- JPS62116260U JPS62116260U JP1986003890U JP389086U JPS62116260U JP S62116260 U JPS62116260 U JP S62116260U JP 1986003890 U JP1986003890 U JP 1986003890U JP 389086 U JP389086 U JP 389086U JP S62116260 U JPS62116260 U JP S62116260U
- Authority
- JP
- Japan
- Prior art keywords
- semiconductor laser
- converter
- digital data
- light
- comparator
- 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.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
- G06K15/1209—Intensity control of the optical beam
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Semiconductor Lasers (AREA)
- Facsimile Scanning Arrangements (AREA)
- Control Of Non-Electrical Variables (AREA)
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
図はこの考案の一実施例を示すブロツク構成図
である。 1……光電流増巾器、2……比較器、3……基
準電圧発生回路、4……マイクロコンピユータ(
制御部)、5……ラツチ回路、6……D/A変換
器、LD……半導体レーザ、PD……ピンフオト
ダイオード(受光素子)。
である。 1……光電流増巾器、2……比較器、3……基
準電圧発生回路、4……マイクロコンピユータ(
制御部)、5……ラツチ回路、6……D/A変換
器、LD……半導体レーザ、PD……ピンフオト
ダイオード(受光素子)。
Claims (1)
- 【実用新案登録請求の範囲】 半導体レーザと、この半導体レーザが出力する
レーザ光の一部を受光する受光素子と、この受光
素子の受光結果と予め定めた基準値とを比較する
比較器と、この比較器の比較結果に基づいて前記
半導体レーザの駆動電流制御値を決定してその制
御値を示すデジタルデータを出力する制御部と、
この制御部からのデジタルデータをアナログ信号
に変換するD/A変換器とを備え、このD/A変
換器からのアナログ信号に応じて前記半導体レー
ザを駆動するようにした半導体レーザ駆動装置に
おいて、 前記制御部と前記D/A変換器との間に前記デ
ジタルデータをラツチするラツチ回路を設けて、
このラツチ回路を緊急リセツト信号によつてリセ
ツトすることにより、ラツチされているデジタル
データを零にすると共に、前記D/A変換器をそ
の入力が零の時に前記半導体レーザの駆動電流が
その閾値以下となるようにオフセツト調整したこ
とを特徴とする半導体レーザ駆動装置の緊急リセ
ツト回路。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986003890U JPH066525Y2 (ja) | 1986-01-13 | 1986-01-13 | 半導体レ−ザ駆動装置の緊急リセツト回路 |
KR1019860011200A KR950013907B1 (ko) | 1986-01-13 | 1986-12-24 | 반도체레이저 구동장치의 긴급리셋회로 |
US07/000,467 US4761661A (en) | 1986-01-13 | 1987-01-05 | Emergency resetting circuit for a semiconductor laser of a laser beam printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986003890U JPH066525Y2 (ja) | 1986-01-13 | 1986-01-13 | 半導体レ−ザ駆動装置の緊急リセツト回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62116260U true JPS62116260U (ja) | 1987-07-23 |
JPH066525Y2 JPH066525Y2 (ja) | 1994-02-16 |
Family
ID=11569777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986003890U Expired - Lifetime JPH066525Y2 (ja) | 1986-01-13 | 1986-01-13 | 半導体レ−ザ駆動装置の緊急リセツト回路 |
Country Status (3)
Country | Link |
---|---|
US (1) | US4761661A (ja) |
JP (1) | JPH066525Y2 (ja) |
KR (1) | KR950013907B1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63175573A (ja) * | 1987-01-14 | 1988-07-19 | Fuji Photo Film Co Ltd | レ−ザ記録装置 |
JPH06227036A (ja) * | 1992-11-04 | 1994-08-16 | Eastman Kodak Co | レーザダイオード電力制御回路 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5123023A (en) * | 1990-11-21 | 1992-06-16 | Polaroid Corporation | Laser driver with plural feedback loops |
US6351786B2 (en) | 1998-08-24 | 2002-02-26 | Racal Instr Inc | VXI backplane system improvements and methods |
US6696887B2 (en) * | 2001-09-27 | 2004-02-24 | Matthew S. Taubman | Transistor-based interface circuitry |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60169182A (ja) * | 1984-02-10 | 1985-09-02 | Ricoh Co Ltd | 半導体レ−ザ保護方式 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60236946A (ja) * | 1984-05-09 | 1985-11-25 | Toshiba Corp | 記録装置 |
-
1986
- 1986-01-13 JP JP1986003890U patent/JPH066525Y2/ja not_active Expired - Lifetime
- 1986-12-24 KR KR1019860011200A patent/KR950013907B1/ko not_active IP Right Cessation
-
1987
- 1987-01-05 US US07/000,467 patent/US4761661A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60169182A (ja) * | 1984-02-10 | 1985-09-02 | Ricoh Co Ltd | 半導体レ−ザ保護方式 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63175573A (ja) * | 1987-01-14 | 1988-07-19 | Fuji Photo Film Co Ltd | レ−ザ記録装置 |
JPH06227036A (ja) * | 1992-11-04 | 1994-08-16 | Eastman Kodak Co | レーザダイオード電力制御回路 |
Also Published As
Publication number | Publication date |
---|---|
JPH066525Y2 (ja) | 1994-02-16 |
US4761661A (en) | 1988-08-02 |
KR870007588A (ko) | 1987-08-20 |
KR950013907B1 (ko) | 1995-11-17 |
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