JPS5525243A - Color temperature correction device - Google Patents

Color temperature correction device

Info

Publication number
JPS5525243A
JPS5525243A JP9791378A JP9791378A JPS5525243A JP S5525243 A JPS5525243 A JP S5525243A JP 9791378 A JP9791378 A JP 9791378A JP 9791378 A JP9791378 A JP 9791378A JP S5525243 A JPS5525243 A JP S5525243A
Authority
JP
Japan
Prior art keywords
gain
change
output
color temperature
signals
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
JP9791378A
Other languages
Japanese (ja)
Other versions
JPS6153912B2 (en
Inventor
Masaaki Nakayama
Yoshinori Kitamura
Shoji Nishikawa
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 JP9791378A priority Critical patent/JPS5525243A/en
Publication of JPS5525243A publication Critical patent/JPS5525243A/en
Publication of JPS6153912B2 publication Critical patent/JPS6153912B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To simplify the correction for the color temperature change caused by the change of the illumination light source by giving the control to each output gain in accordance with the change of the output ratio between signals R and B.
CONSTITUTION: The white balance of the camera output is secured when the color temperature of the light source is 3200°K to be used as the reference temperature. The gain is controlled for R and B signal amplifiers 505 and 506' against the change of the color temperature. To keep the white balance constant, the output ratio between the R and B signals is fixed through control of the gain. In terms of the characteristics due to the color temperatures of signals R and B, the correction to the Kelvin of the amplifier is attained by applying the reciprocal-fold gain of the output fluctuation ratio due to the temperature change to gain GR3200°K and GB3200°K each at 3200°K. The gain control voltage is generated from the single power source and via inverse amplifier 702 and nonlinear circuit 701 which satisfies the temperature characteristic curve.
COPYRIGHT: (C)1980,JPO&Japio
JP9791378A 1978-08-10 1978-08-10 Color temperature correction device Granted JPS5525243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9791378A JPS5525243A (en) 1978-08-10 1978-08-10 Color temperature correction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9791378A JPS5525243A (en) 1978-08-10 1978-08-10 Color temperature correction device

Publications (2)

Publication Number Publication Date
JPS5525243A true JPS5525243A (en) 1980-02-22
JPS6153912B2 JPS6153912B2 (en) 1986-11-19

Family

ID=14204943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9791378A Granted JPS5525243A (en) 1978-08-10 1978-08-10 Color temperature correction device

Country Status (1)

Country Link
JP (1) JPS5525243A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159592A (en) * 1986-01-07 1987-07-15 Victor Co Of Japan Ltd Automatic white color adjuster for television camera
JPH01157189A (en) * 1988-11-22 1989-06-20 Olympus Optical Co Ltd Image signal processing circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6364309A (en) * 1986-09-04 1988-03-22 Matsushita Electric Ind Co Ltd Method for mounting coil component
JPH01165605U (en) * 1988-05-10 1989-11-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159592A (en) * 1986-01-07 1987-07-15 Victor Co Of Japan Ltd Automatic white color adjuster for television camera
JPH01157189A (en) * 1988-11-22 1989-06-20 Olympus Optical Co Ltd Image signal processing circuit

Also Published As

Publication number Publication date
JPS6153912B2 (en) 1986-11-19

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