HK1011775A1 - Image forming apparatus and constant current circuit switching device for use therewith - Google Patents
Image forming apparatus and constant current circuit switching device for use therewithInfo
- Publication number
- HK1011775A1 HK1011775A1 HK98112627A HK98112627A HK1011775A1 HK 1011775 A1 HK1011775 A1 HK 1011775A1 HK 98112627 A HK98112627 A HK 98112627A HK 98112627 A HK98112627 A HK 98112627A HK 1011775 A1 HK1011775 A1 HK 1011775A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- image forming
- forming apparatus
- switching device
- constant current
- current circuit
- Prior art date
Links
Classifications
-
- 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
- G06K15/1214—Intensity control of the optical beam by feedback
-
- 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
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
-
- 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
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
- H01S5/06213—Amplitude modulation
-
- 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
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0427—Electrical excitation ; Circuits therefor for applying modulation to the laser
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Semiconductor Lasers (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2176244A JPH0468759A (ja) | 1990-07-05 | 1990-07-05 | 画像形成装置 |
JP17624590A JPH0468752A (ja) | 1990-07-05 | 1990-07-05 | レーザ制御装置 |
JP3140682A JP3001167B2 (ja) | 1991-05-17 | 1991-05-17 | 定電流回路スイッチング装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1011775A1 true HK1011775A1 (en) | 1999-07-16 |
Family
ID=27318104
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK98112627A HK1011775A1 (en) | 1990-07-05 | 1998-12-01 | Image forming apparatus and constant current circuit switching device for use therewith |
HK98112758A HK1011783A1 (en) | 1990-07-05 | 1998-12-03 | Driving ic for driving a light source and laser printer using such driving ic |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK98112758A HK1011783A1 (en) | 1990-07-05 | 1998-12-03 | Driving ic for driving a light source and laser printer using such driving ic |
Country Status (4)
Country | Link |
---|---|
US (1) | US5373518A (xx) |
EP (2) | EP0464813B1 (xx) |
DE (2) | DE69132464T2 (xx) |
HK (2) | HK1011775A1 (xx) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06171144A (ja) * | 1992-09-24 | 1994-06-21 | Canon Inc | レーザビームプリンタ |
US5566199A (en) * | 1993-12-29 | 1996-10-15 | Kepros; John G. | Holographic technique for extreme microcircuitry size reduction |
US5822343A (en) * | 1994-08-26 | 1998-10-13 | Psc Inc. | Operating and control system for lasers useful in bar code scanners |
US5612529A (en) * | 1994-10-31 | 1997-03-18 | Psc Inc. | System for bar code reading and scanning with automatic gain control |
JPH08160828A (ja) * | 1994-12-07 | 1996-06-21 | Canon Inc | 電子写真プリンタ |
US5539352A (en) * | 1994-12-28 | 1996-07-23 | General Electric Company | Low power voltage input circuit with high noise immunity and fast operating time |
US6064419A (en) * | 1994-12-28 | 2000-05-16 | Canon Kabushiki Kaisha | Timings of rotational speed in a laser beam printer |
US5834750A (en) * | 1995-02-28 | 1998-11-10 | Psc, Inc. | Bar code scanning system for automatically maintaining constant the amplitude of light reflected from a bar code |
JP3423115B2 (ja) * | 1995-07-18 | 2003-07-07 | 富士通株式会社 | 光信号送信装置 |
US5933441A (en) * | 1997-11-06 | 1999-08-03 | Chen; Hung-Ping | Circuit for protecting a laser indicator |
JPH11208017A (ja) * | 1998-01-30 | 1999-08-03 | Canon Inc | 発光素子駆動装置 |
JPH11348343A (ja) | 1998-06-03 | 1999-12-21 | Canon Inc | 画像形成方法および装置 |
JP2000218865A (ja) * | 1998-11-25 | 2000-08-08 | Canon Inc | レ―ザ駆動装置とその駆動方法及びそれを用いた画像形成装置 |
DE10065838C2 (de) | 2000-12-29 | 2003-06-26 | Infineon Technologies Ag | Elektronische Treiberschaltung für einen direkt modulierten Halbleiterlaser |
JP4605692B2 (ja) * | 2004-03-19 | 2011-01-05 | 株式会社リコー | 半導体レーザ変調駆動装置及び画像形成装置 |
US7746590B2 (en) | 2004-10-06 | 2010-06-29 | Agere Systems Inc. | Current mirrors having fast turn-on time |
JP2006110801A (ja) * | 2004-10-13 | 2006-04-27 | Canon Inc | レーザ駆動装置 |
JP5441309B2 (ja) * | 2006-02-13 | 2014-03-12 | キヤノン株式会社 | 揺動体装置、及び光偏向装置 |
JP5361344B2 (ja) * | 2008-11-20 | 2013-12-04 | キヤノン株式会社 | 画像形成装置 |
JP5424995B2 (ja) | 2010-06-24 | 2014-02-26 | キヤノン株式会社 | 光走査装置及び画像形成装置 |
JP6587430B2 (ja) * | 2015-06-23 | 2019-10-09 | キヤノン株式会社 | 画像生成装置及び画像生成方法 |
JP6886235B2 (ja) | 2015-09-24 | 2021-06-16 | キヤノン株式会社 | 記録装置および発光素子駆動用基板 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59146069A (ja) * | 1983-02-08 | 1984-08-21 | Canon Inc | 光源安定化装置 |
US4819242A (en) * | 1985-11-20 | 1989-04-04 | Hitachi, Ltd. | Semiconductor laser driver circuit |
DE3728234A1 (de) * | 1986-08-26 | 1988-04-28 | Sharp Kk | Steuervorrichtung fuer eine laserdiode |
NL8701986A (nl) * | 1987-08-25 | 1989-03-16 | Oce Nederland Bv | Besturingsschakeling voor een laserprinter. |
US4899344A (en) * | 1987-12-07 | 1990-02-06 | Ricoh Co., Ltd. | Semiconductor laser control apparatus |
DE68925852T2 (de) * | 1988-09-06 | 1996-10-17 | Canon Kk | Belichtungsstärkesteuergerät |
-
1991
- 1991-07-04 DE DE69132464T patent/DE69132464T2/de not_active Expired - Fee Related
- 1991-07-04 EP EP91111107A patent/EP0464813B1/en not_active Expired - Lifetime
- 1991-07-04 DE DE69130308T patent/DE69130308T2/de not_active Expired - Fee Related
- 1991-07-04 EP EP97101158A patent/EP0775969B1/en not_active Expired - Lifetime
-
1993
- 1993-03-22 US US08/042,900 patent/US5373518A/en not_active Expired - Lifetime
-
1998
- 1998-12-01 HK HK98112627A patent/HK1011775A1/xx not_active IP Right Cessation
- 1998-12-03 HK HK98112758A patent/HK1011783A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0775969A3 (en) | 1997-09-03 |
US5373518A (en) | 1994-12-13 |
EP0775969A2 (en) | 1997-05-28 |
EP0775969B1 (en) | 2000-11-02 |
EP0464813A3 (en) | 1993-03-31 |
EP0464813A2 (en) | 1992-01-08 |
HK1011783A1 (en) | 1999-07-16 |
DE69132464T2 (de) | 2001-05-10 |
DE69130308T2 (de) | 1999-05-06 |
EP0464813B1 (en) | 1998-10-07 |
DE69130308D1 (de) | 1998-11-12 |
DE69132464D1 (de) | 2000-12-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20070704 |