JPS5774752A - Laser printer - Google Patents

Laser printer

Info

Publication number
JPS5774752A
JPS5774752A JP55150805A JP15080580A JPS5774752A JP S5774752 A JPS5774752 A JP S5774752A JP 55150805 A JP55150805 A JP 55150805A JP 15080580 A JP15080580 A JP 15080580A JP S5774752 A JPS5774752 A JP S5774752A
Authority
JP
Japan
Prior art keywords
inputted
modulator
signal
output
picture 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
Application number
JP55150805A
Other languages
Japanese (ja)
Inventor
Isamu Shibata
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55150805A priority Critical patent/JPS5774752A/en
Publication of JPS5774752A publication Critical patent/JPS5774752A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/38—Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Laser Beam Printer (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To prevent a texture from being stained by detecting the output of a modulator as a rising time when no picture signal is inputted, and minimizing the output. CONSTITUTION:A laser beam L from a laser generator 1 is passed through an acousto-optic modulator 3, and a polygon reflecting mirror 6 to scan on a photoreceptor 9. A picture signals is inputted to the acousto-optic modulator 3 through a video amplifier 13, a modulator 12 and a power amplifier 16 to perform the optical modulation of the laser beam according to the picture signal. A signal from the modulator 12 at a halfway point is inputted, being combined with a gate signal 21, to a gate circuit 20, whose output is applied to the offset control terminal of a video amplifier 13 through a rectifying circuit 22, a holding circuit 24 and a comparator 25. Consequently, when the picture signal is not inputted, that is detected to exercise control so that carrier leakage is minimized, thereby preventing texture from being stained.
JP55150805A 1980-10-29 1980-10-29 Laser printer Pending JPS5774752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150805A JPS5774752A (en) 1980-10-29 1980-10-29 Laser printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150805A JPS5774752A (en) 1980-10-29 1980-10-29 Laser printer

Publications (1)

Publication Number Publication Date
JPS5774752A true JPS5774752A (en) 1982-05-11

Family

ID=15504805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150805A Pending JPS5774752A (en) 1980-10-29 1980-10-29 Laser printer

Country Status (1)

Country Link
JP (1) JPS5774752A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02233976A (en) * 1989-03-06 1990-09-17 Matsushita Refrig Co Ltd Temperature display device for show case
JPH02233977A (en) * 1989-03-06 1990-09-17 Matsushita Refrig Co Ltd Temperature display device for show case and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02233976A (en) * 1989-03-06 1990-09-17 Matsushita Refrig Co Ltd Temperature display device for show case
JPH02233977A (en) * 1989-03-06 1990-09-17 Matsushita Refrig Co Ltd Temperature display device for show case and the like

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