JPS5635593A - Automatic color temperature control circuit for color television picture receiver - Google Patents

Automatic color temperature control circuit for color television picture receiver

Info

Publication number
JPS5635593A
JPS5635593A JP11031079A JP11031079A JPS5635593A JP S5635593 A JPS5635593 A JP S5635593A JP 11031079 A JP11031079 A JP 11031079A JP 11031079 A JP11031079 A JP 11031079A JP S5635593 A JPS5635593 A JP S5635593A
Authority
JP
Japan
Prior art keywords
current
diode
crt
control circuit
temperature control
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
JP11031079A
Other languages
Japanese (ja)
Inventor
Takeshi Adachi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11031079A priority Critical patent/JPS5635593A/en
Publication of JPS5635593A publication Critical patent/JPS5635593A/en
Pending 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 increase the visual contrast by decreasing the 2-axis current of the CRT which is supplied from the output transistor for CRT driving in adverse proportion to the anode current in case the anode current exceeds the fixed level. CONSTITUTION:When the anode current IH of the CRT16 increases and decreases in accordance with variation of the contrast, the current IH is supplied from the power source +B. When this current exceeds the fixed level, the 2nd diode 22 is turned off. And at the same time, the cathode voltage of the 1st diode 20 is lowered down. This diode 20 conducts to lower the base bias of the transistors 1 and 2 each. As a result, the collector current of the output transistor 1 and 2 for (R-Y) and (G-Y) each is reduced. And thus the CRT current of (B-Y) is increased equivalently to increase the color temperature.
JP11031079A 1979-08-31 1979-08-31 Automatic color temperature control circuit for color television picture receiver Pending JPS5635593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11031079A JPS5635593A (en) 1979-08-31 1979-08-31 Automatic color temperature control circuit for color television picture receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11031079A JPS5635593A (en) 1979-08-31 1979-08-31 Automatic color temperature control circuit for color television picture receiver

Publications (1)

Publication Number Publication Date
JPS5635593A true JPS5635593A (en) 1981-04-08

Family

ID=14532460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11031079A Pending JPS5635593A (en) 1979-08-31 1979-08-31 Automatic color temperature control circuit for color television picture receiver

Country Status (1)

Country Link
JP (1) JPS5635593A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493342A (en) * 1992-12-21 1996-02-20 Naito; Yasushi White balance correction circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493342A (en) * 1992-12-21 1996-02-20 Naito; Yasushi White balance correction circuit

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