JPS57162570A - Original reader - Google Patents

Original reader

Info

Publication number
JPS57162570A
JPS57162570A JP56046160A JP4616081A JPS57162570A JP S57162570 A JPS57162570 A JP S57162570A JP 56046160 A JP56046160 A JP 56046160A JP 4616081 A JP4616081 A JP 4616081A JP S57162570 A JPS57162570 A JP S57162570A
Authority
JP
Japan
Prior art keywords
original
yellow
red
light
shift registers
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
JP56046160A
Other languages
Japanese (ja)
Inventor
Toshifumi Nakashima
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56046160A priority Critical patent/JPS57162570A/en
Publication of JPS57162570A publication Critical patent/JPS57162570A/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
    • H04N1/46—Colour picture communication systems
    • H04N1/48—Picture signal generators
    • H04N1/482—Picture signal generators using the same detector device sequentially for different colour components
    • H04N1/484—Picture signal generators using the same detector device sequentially for different colour components with sequential colour illumination of the original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To read the color information at the reading point of an original reader which is used for a fascimile device, etc., by irradiating plural light sources having different wavelengths of light emission in time division corresponding to the reading speed. CONSTITUTION:The signals given from a ring counter 30 are extracted successively to signal lines 30a, 30b, 30c and 30d respectively in accordance with the reading speed to light up light emitting diodes (LED) 20a, 20b and 20c of red, yellow and green respectively that illuminate the different positions. The line 30d is fed back to the counter 30 and reset and at the same time drivesan original scan driving circuit. On the other hand, the signal given from a photoelectric transducer 22 is amplified 23 and binary coded 24 to be used for the clock input of shift registers 25a, 25b and 25c respectively. These shift registers consist of three bits each, and the different bit positions are connected to latch circuits 26a, 26b and 26c respectively. Thus the red, yellow and green signals on the same spot on an original are used for the output signal of each latch circuit.
JP56046160A 1981-03-31 1981-03-31 Original reader Pending JPS57162570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56046160A JPS57162570A (en) 1981-03-31 1981-03-31 Original reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56046160A JPS57162570A (en) 1981-03-31 1981-03-31 Original reader

Publications (1)

Publication Number Publication Date
JPS57162570A true JPS57162570A (en) 1982-10-06

Family

ID=12739250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56046160A Pending JPS57162570A (en) 1981-03-31 1981-03-31 Original reader

Country Status (1)

Country Link
JP (1) JPS57162570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207189A (en) * 1984-03-31 1985-10-18 株式会社東芝 Image signal processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207189A (en) * 1984-03-31 1985-10-18 株式会社東芝 Image signal processor
JPH0640255B2 (en) * 1984-03-31 1994-05-25 株式会社東芝 Image signal processor

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