JPS57154976A - Blanking device - Google Patents

Blanking device

Info

Publication number
JPS57154976A
JPS57154976A JP56041208A JP4120881A JPS57154976A JP S57154976 A JPS57154976 A JP S57154976A JP 56041208 A JP56041208 A JP 56041208A JP 4120881 A JP4120881 A JP 4120881A JP S57154976 A JPS57154976 A JP S57154976A
Authority
JP
Japan
Prior art keywords
period
current
video signal
blanking period
flows
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
JP56041208A
Other languages
Japanese (ja)
Other versions
JPS6218111B2 (en
Inventor
Tatsuki Ide
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56041208A priority Critical patent/JPS57154976A/en
Publication of JPS57154976A publication Critical patent/JPS57154976A/en
Publication of JPS6218111B2 publication Critical patent/JPS6218111B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To avoid a shift of the white balance, by preventing the occurrence of an error of the DC potential between the blanking period of a video signal and the period of other signals. CONSTITUTION:During the blanking period, an emitter current IE of a transistor TR3 flows through a TR31 in the form of a constant current I42. The current IE flows through a TR32 in the form of a constant current I43 during the video signal period excepting the blanking period. Then both the constant current circuits 37 and 38 are set so as to satisfy I42=I43 in both the blanking period and other video signal period. As a result, the emitter current IE flows with a constant level in both the blanking period and other video signal period. Thus no change occurs to the current IE to avoid a shift of the white balance with a picture image.
JP56041208A 1981-03-19 1981-03-19 Blanking device Granted JPS57154976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56041208A JPS57154976A (en) 1981-03-19 1981-03-19 Blanking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56041208A JPS57154976A (en) 1981-03-19 1981-03-19 Blanking device

Publications (2)

Publication Number Publication Date
JPS57154976A true JPS57154976A (en) 1982-09-24
JPS6218111B2 JPS6218111B2 (en) 1987-04-21

Family

ID=12601984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56041208A Granted JPS57154976A (en) 1981-03-19 1981-03-19 Blanking device

Country Status (1)

Country Link
JP (1) JPS57154976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116082A (en) * 1985-11-15 1987-05-27 Sony Corp Blanking circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63197438A (en) * 1987-02-10 1988-08-16 横河メディカルシステム株式会社 Tgc curve setting circuit of ultrasonic diagnostic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116082A (en) * 1985-11-15 1987-05-27 Sony Corp Blanking circuit

Also Published As

Publication number Publication date
JPS6218111B2 (en) 1987-04-21

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