JPH01279670A - Synchronizing signal generating circuit with display function of synchronized state of laser printer - Google Patents

Synchronizing signal generating circuit with display function of synchronized state of laser printer

Info

Publication number
JPH01279670A
JPH01279670A JP63110153A JP11015388A JPH01279670A JP H01279670 A JPH01279670 A JP H01279670A JP 63110153 A JP63110153 A JP 63110153A JP 11015388 A JP11015388 A JP 11015388A JP H01279670 A JPH01279670 A JP H01279670A
Authority
JP
Japan
Prior art keywords
synchronizing signal
led
photoelectric sensor
signal generating
generating circuit
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
JP63110153A
Other languages
Japanese (ja)
Inventor
Hisashi Naganuma
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP63110153A priority Critical patent/JPH01279670A/en
Publication of JPH01279670A publication Critical patent/JPH01279670A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To facilitate to adjust the fitting position of a photoelectric sensor by providing an LED to be driven by the differentiated output of the photoelectric sensor, and adjusting the fitting position of the photoelectric sensor according to the intensity of the emitted light of the LED.
CONSTITUTION: A photodiode 1 of the photoelectric sensor is fitted at a position for generating a synchronizing signal, and its output is amplified by a current voltage conversion circuit 2, and is inputted to a synchronizing signal generating part 3. On the other hand, the output of the current voltage conversion circuit 2 is differentiated by a differentiation circuit 4, and is inputted to a peak hold circuit 5, and is amplified by a voltage current conversion circuit 6, and lights the LED 7. If the position of the photodiode 1 is adjusted so that the brightness of this LED 7 comes to be a maximum value, the proper synchronizing signal can be obtained.
COPYRIGHT: (C)1989,JPO&Japio
JP63110153A 1988-05-06 1988-05-06 Synchronizing signal generating circuit with display function of synchronized state of laser printer Pending JPH01279670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63110153A JPH01279670A (en) 1988-05-06 1988-05-06 Synchronizing signal generating circuit with display function of synchronized state of laser printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63110153A JPH01279670A (en) 1988-05-06 1988-05-06 Synchronizing signal generating circuit with display function of synchronized state of laser printer

Publications (1)

Publication Number Publication Date
JPH01279670A true JPH01279670A (en) 1989-11-09

Family

ID=14528396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63110153A Pending JPH01279670A (en) 1988-05-06 1988-05-06 Synchronizing signal generating circuit with display function of synchronized state of laser printer

Country Status (1)

Country Link
JP (1) JPH01279670A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001006484A1 (en) * 1999-07-14 2001-01-25 Sony Corporation Current drive circuit and display comprising the same, pixel circuit, and drive method
US7193591B2 (en) 1999-07-14 2007-03-20 Sony Corporation Current drive circuit and display device using same, pixel circuit, and drive method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001006484A1 (en) * 1999-07-14 2001-01-25 Sony Corporation Current drive circuit and display comprising the same, pixel circuit, and drive method
US6859193B1 (en) 1999-07-14 2005-02-22 Sony Corporation Current drive circuit and display device using the same, pixel circuit, and drive method
US7193591B2 (en) 1999-07-14 2007-03-20 Sony Corporation Current drive circuit and display device using same, pixel circuit, and drive method
US7379039B2 (en) 1999-07-14 2008-05-27 Sony Corporation Current drive circuit and display device using same pixel circuit, and drive method
US7388564B2 (en) 1999-07-14 2008-06-17 Sony Corporation Current drive circuit and display device using same, pixel circuit, and drive method

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