JPS6482580A - Method and equipment for driving array light emitting device - Google Patents

Method and equipment for driving array light emitting device

Info

Publication number
JPS6482580A
JPS6482580A JP24181387A JP24181387A JPS6482580A JP S6482580 A JPS6482580 A JP S6482580A JP 24181387 A JP24181387 A JP 24181387A JP 24181387 A JP24181387 A JP 24181387A JP S6482580 A JPS6482580 A JP S6482580A
Authority
JP
Japan
Prior art keywords
light
laser diode
light emitting
driving
controlling
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
Application number
JP24181387A
Other languages
Japanese (ja)
Inventor
Hiroshi Matsubara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP24181387A priority Critical patent/JPS6482580A/en
Publication of JPS6482580A publication Critical patent/JPS6482580A/en
Pending legal-status Critical Current

Links

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
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • 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
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
    • H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Led Devices (AREA)

Abstract

PURPOSE:To enable regulating the light output of each light emitting element and controlling light output with high precision, by putting, periodically in order, light emitting elements of an array light emitting device except one element, in pausing state, and controlling the light output of the light emitting element in light emitting state, in a specified value previously determined. CONSTITUTION:By a driving signal from a controlling part 1, the driving of laser diode elements L2, L3 except a laser diode element L1 is interrupted, during an interval from time Tn to time Tn+DELTAT. At this time, only the laser diode element L1 emits light, and a photo detecting part 15 is irradiated with only the output light of the laser diode element L1. The incident light from the laser diode element L1 is converted into a current signal proportional to the light intensity, and delivered to the controlling part 1, which compares a current signal from the photo detecting part 15 and a current flowing condition signal previously given, and so controls the driving current I, that the difference is decreased. After that, light output adjustments of the respective laser diode elements L1-L3 are repeated at the respective adjusting time points, and the driving current is set to a fixed value. The above operation is repeated for all array laser devices 14, and the light output is controlled.
JP24181387A 1987-09-24 1987-09-24 Method and equipment for driving array light emitting device Pending JPS6482580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24181387A JPS6482580A (en) 1987-09-24 1987-09-24 Method and equipment for driving array light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24181387A JPS6482580A (en) 1987-09-24 1987-09-24 Method and equipment for driving array light emitting device

Publications (1)

Publication Number Publication Date
JPS6482580A true JPS6482580A (en) 1989-03-28

Family

ID=17079879

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24181387A Pending JPS6482580A (en) 1987-09-24 1987-09-24 Method and equipment for driving array light emitting device

Country Status (1)

Country Link
JP (1) JPS6482580A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004006622A (en) * 2001-12-20 2004-01-08 Osram Opto Semiconductors Gmbh Led array and led module
JP2007292591A (en) * 2006-04-25 2007-11-08 Ricoh Co Ltd Substrate unit for reliability test, and apparatus and method for reliability test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004006622A (en) * 2001-12-20 2004-01-08 Osram Opto Semiconductors Gmbh Led array and led module
JP2007292591A (en) * 2006-04-25 2007-11-08 Ricoh Co Ltd Substrate unit for reliability test, and apparatus and method for reliability test

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