JPS54151485A - Photoelectric detecting device - Google Patents

Photoelectric detecting device

Info

Publication number
JPS54151485A
JPS54151485A JP6052478A JP6052478A JPS54151485A JP S54151485 A JPS54151485 A JP S54151485A JP 6052478 A JP6052478 A JP 6052478A JP 6052478 A JP6052478 A JP 6052478A JP S54151485 A JPS54151485 A JP S54151485A
Authority
JP
Japan
Prior art keywords
video signal
level
lightweight
easy
adjust
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.)
Granted
Application number
JP6052478A
Other languages
Japanese (ja)
Other versions
JPS5920086B2 (en
Inventor
Yukio Uenishi
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP6052478A priority Critical patent/JPS5920086B2/en
Publication of JPS54151485A publication Critical patent/JPS54151485A/en
Publication of JPS5920086B2 publication Critical patent/JPS5920086B2/en
Expired 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
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To obtain a photoelectric detector which is simple, lightweight, and easy to adjust and handle, by discriminating whether the video signal is within the appropriately specified upper and lower levels in a certain scanning period of video signal, and displaying by means of a display element. CONSTITUTION:Two 4-bit binary counters C1, C2 are provided: C1 counts clock pulses D, and C2 counts the carry signals of C1. Each terminal of decoders D1, D2 is connected to an AND circuit AND through selector switches S1, S2, respectively, and the outputs thereof are connected to the input terminals on one side of two NAND gates NA1, NA2. Level comparator circuits L1, L2 compare V of the video signal with the reference levels 1, 2, and a signal is outputted when the video signal exceeds each level. That is, when the video signal is above level 1, both LEDs d1 and d2 are lit, and when it is below level 2, neither LED lights up. Thus, a simple, lightweight, and easy-to-adjust photoelectric detector may be obtained.
JP6052478A 1978-05-19 1978-05-19 Photoelectric detection device Expired JPS5920086B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6052478A JPS5920086B2 (en) 1978-05-19 1978-05-19 Photoelectric detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6052478A JPS5920086B2 (en) 1978-05-19 1978-05-19 Photoelectric detection device

Publications (2)

Publication Number Publication Date
JPS54151485A true JPS54151485A (en) 1979-11-28
JPS5920086B2 JPS5920086B2 (en) 1984-05-10

Family

ID=13144778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6052478A Expired JPS5920086B2 (en) 1978-05-19 1978-05-19 Photoelectric detection device

Country Status (1)

Country Link
JP (1) JPS5920086B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073992U (en) * 1983-10-27 1985-05-24 日本鋼管株式会社 Fitting for hot tap
JPS60189676U (en) * 1984-05-25 1985-12-16 矢野技研株式会社 Fluid transport pipe connection structure

Also Published As

Publication number Publication date
JPS5920086B2 (en) 1984-05-10

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