JPS56116391A - Automatic adjusting device of white balance - Google Patents

Automatic adjusting device of white balance

Info

Publication number
JPS56116391A
JPS56116391A JP1993380A JP1993380A JPS56116391A JP S56116391 A JPS56116391 A JP S56116391A JP 1993380 A JP1993380 A JP 1993380A JP 1993380 A JP1993380 A JP 1993380A JP S56116391 A JPS56116391 A JP S56116391A
Authority
JP
Japan
Prior art keywords
signal
white
control
output
input
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
JP1993380A
Other languages
Japanese (ja)
Other versions
JPS6251557B2 (en
Inventor
Taku Sasaki
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP1993380A priority Critical patent/JPS56116391A/en
Publication of JPS56116391A publication Critical patent/JPS56116391A/en
Publication of JPS6251557B2 publication Critical patent/JPS6251557B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To enable to reproduce the specified white color, by controlling each amplifier for R and B signals in case of white objective, through the discrimination whether or not being the white objective, by the detection of minimum hue in the high luminance. CONSTITUTION:R-Y signal and B-Y signal fed from a matrix circuit 4 are clamped 10, 11 respectively, then the outputs VY, VX obtained from the amplifications 14, 15 of each output level of the R-Y signal and B-Y signal at minimum hue which are obtained from the sampling based on the sampling pulse for each clamp output at the 1st and 2nd sampling circuits 12, 13, are input to a color discrimination circuit 16 for discrimination. The amplified outputs VY, VX are input to the 1st and 2nd control circuits 19, 20 only when the 1st and 2nd switching circuits 17, 18 pick up the white part, in which the discriminated output is taken as the control input, and the white balance of the white part detected through the control of the amplified gain of the R signal amplifier 2 and the B signal amplifier 3 is automatically adjusted with each control output.
JP1993380A 1980-02-19 1980-02-19 Automatic adjusting device of white balance Granted JPS56116391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1993380A JPS56116391A (en) 1980-02-19 1980-02-19 Automatic adjusting device of white balance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1993380A JPS56116391A (en) 1980-02-19 1980-02-19 Automatic adjusting device of white balance

Publications (2)

Publication Number Publication Date
JPS56116391A true JPS56116391A (en) 1981-09-12
JPS6251557B2 JPS6251557B2 (en) 1987-10-30

Family

ID=12013010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1993380A Granted JPS56116391A (en) 1980-02-19 1980-02-19 Automatic adjusting device of white balance

Country Status (1)

Country Link
JP (1) JPS56116391A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61184079A (en) * 1985-02-08 1986-08-16 Toshiba Corp Circuit and system for controlling automatic white balance
JPS62128692A (en) * 1985-11-29 1987-06-10 Matsushita Electric Ind Co Ltd Video camera device
JPS6313489A (en) * 1986-07-03 1988-01-20 Matsushita Electric Ind Co Ltd White balance adjusting device
JPS6320993A (en) * 1986-07-15 1988-01-28 Matsushita Electric Ind Co Ltd White balance adjusting device
US4797733A (en) * 1986-12-12 1989-01-10 Hitachi, Ltd. White balance adjusting device for a color video camera
JPH01112887A (en) * 1987-10-27 1989-05-01 Canon Inc White balance adjusting device
JPH01264088A (en) * 1987-12-29 1989-10-20 Fuji Photo Film Co Ltd Method and apparatus for automatic adjustment of white balance
US7352409B2 (en) 2002-04-09 2008-04-01 Sanyo Electric Co., Ltd. Blue stretch circuit and level detection circuit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61184079A (en) * 1985-02-08 1986-08-16 Toshiba Corp Circuit and system for controlling automatic white balance
JPS62128692A (en) * 1985-11-29 1987-06-10 Matsushita Electric Ind Co Ltd Video camera device
JPS6313489A (en) * 1986-07-03 1988-01-20 Matsushita Electric Ind Co Ltd White balance adjusting device
JPH0728415B2 (en) * 1986-07-03 1995-03-29 松下電器産業株式会社 White balance adjustment device
JPS6320993A (en) * 1986-07-15 1988-01-28 Matsushita Electric Ind Co Ltd White balance adjusting device
US4797733A (en) * 1986-12-12 1989-01-10 Hitachi, Ltd. White balance adjusting device for a color video camera
JPH01112887A (en) * 1987-10-27 1989-05-01 Canon Inc White balance adjusting device
JPH01264088A (en) * 1987-12-29 1989-10-20 Fuji Photo Film Co Ltd Method and apparatus for automatic adjustment of white balance
US7352409B2 (en) 2002-04-09 2008-04-01 Sanyo Electric Co., Ltd. Blue stretch circuit and level detection circuit

Also Published As

Publication number Publication date
JPS6251557B2 (en) 1987-10-30

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