JPS55110486A - Color temperature correction circuit for color television camera - Google Patents

Color temperature correction circuit for color television camera

Info

Publication number
JPS55110486A
JPS55110486A JP1739679A JP1739679A JPS55110486A JP S55110486 A JPS55110486 A JP S55110486A JP 1739679 A JP1739679 A JP 1739679A JP 1739679 A JP1739679 A JP 1739679A JP S55110486 A JPS55110486 A JP S55110486A
Authority
JP
Japan
Prior art keywords
color temperature
color
detectors
detector
detected
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
JP1739679A
Other languages
Japanese (ja)
Inventor
Shoji Nishikawa
Yoshinori Kitamura
Tatsuki Ide
Masaaki Nakayama
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 JP1739679A priority Critical patent/JPS55110486A/en
Publication of JPS55110486A publication Critical patent/JPS55110486A/en
Pending legal-status Critical Current

Links

Landscapes

  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To perform the correction of color temperature with a simple constitution, by detecting the color temperature of light source normally and automatically adjusting the color temperature to make unnecessary the temperature set every color temperature of illumination of objective changed.
CONSTITUTION: The different colors from the light source are detected at the color detectors 31 and 32, and color temperature is detected at the color temperature detector 33 with the ratio of the color signals different from the detectors 31 and 32. The output of the detector 33 is fed to the color temperature correctors 34, 35 and the voltage determining the gain of the red and blue signals is produced from the color temperature correctors 34 and 35 through the use of the output of the detector 33. Further, the gain of the external variable gain amplifiers 12, 13 amplifying the red and blue signals R, B detected at the detectors 10, 11 is adjusted automatically, and color difference signals R-YL, B-YL are made with the subtractors 14, 15 and they are fed to the encoder 16 and the standard TV signal is formed by adding the luminace signal YH.
COPYRIGHT: (C)1980,JPO&Japio
JP1739679A 1979-02-16 1979-02-16 Color temperature correction circuit for color television camera Pending JPS55110486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1739679A JPS55110486A (en) 1979-02-16 1979-02-16 Color temperature correction circuit for color television camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1739679A JPS55110486A (en) 1979-02-16 1979-02-16 Color temperature correction circuit for color television camera

Publications (1)

Publication Number Publication Date
JPS55110486A true JPS55110486A (en) 1980-08-25

Family

ID=11942828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1739679A Pending JPS55110486A (en) 1979-02-16 1979-02-16 Color temperature correction circuit for color television camera

Country Status (1)

Country Link
JP (1) JPS55110486A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60254894A (en) * 1984-05-31 1985-12-16 Matsushita Electric Ind Co Ltd Color camera
JPS6158393A (en) * 1984-08-30 1986-03-25 Nec Corp Color image pick up device
US4682210A (en) * 1985-04-05 1987-07-21 Victor Company Of Japan, Ltd. Automatic white balance adjusting circuit for image pickup device
US4700219A (en) * 1984-04-09 1987-10-13 Nec Corporation Color imaging apparatus
US4774564A (en) * 1986-09-09 1988-09-27 Fuji Photo Film Co., Ltd. Electronic still camera for compensating color temperature dependency of color video signals
US4879591A (en) * 1986-01-31 1989-11-07 Canon Kabushiki Kaisha Image pickup apparatus compensating an image signal for variations in color temperature

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055221A (en) * 1973-09-12 1975-05-15
JPS5178925A (en) * 1974-12-30 1976-07-09 Teac Corp Karaasatsuzosochi

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055221A (en) * 1973-09-12 1975-05-15
JPS5178925A (en) * 1974-12-30 1976-07-09 Teac Corp Karaasatsuzosochi

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700219A (en) * 1984-04-09 1987-10-13 Nec Corporation Color imaging apparatus
JPS60254894A (en) * 1984-05-31 1985-12-16 Matsushita Electric Ind Co Ltd Color camera
JPS6158393A (en) * 1984-08-30 1986-03-25 Nec Corp Color image pick up device
US4682210A (en) * 1985-04-05 1987-07-21 Victor Company Of Japan, Ltd. Automatic white balance adjusting circuit for image pickup device
US4879591A (en) * 1986-01-31 1989-11-07 Canon Kabushiki Kaisha Image pickup apparatus compensating an image signal for variations in color temperature
US4774564A (en) * 1986-09-09 1988-09-27 Fuji Photo Film Co., Ltd. Electronic still camera for compensating color temperature dependency of color video signals

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