KR890016844A - Auto Brightness Limit Circuit - Google Patents

Auto Brightness Limit Circuit Download PDF

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Publication number
KR890016844A
KR890016844A KR1019880004167A KR880004167A KR890016844A KR 890016844 A KR890016844 A KR 890016844A KR 1019880004167 A KR1019880004167 A KR 1019880004167A KR 880004167 A KR880004167 A KR 880004167A KR 890016844 A KR890016844 A KR 890016844A
Authority
KR
South Korea
Prior art keywords
contrast
transistor
video signal
power supply
bias
Prior art date
Application number
KR1019880004167A
Other languages
Korean (ko)
Other versions
KR910007545B1 (en
Inventor
김광석
Original Assignee
안시환
삼성전자 주식회사
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 안시환, 삼성전자 주식회사 filed Critical 안시환
Priority to KR1019880004167A priority Critical patent/KR910007545B1/en
Publication of KR890016844A publication Critical patent/KR890016844A/en
Application granted granted Critical
Publication of KR910007545B1 publication Critical patent/KR910007545B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

내용 없음No content

Description

자동휘도 제한회로Auto Brightness Limit Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

본 발명의 회로도.Circuit diagram of the present invention.

Claims (4)

비데오 신호를 증폭시켜 후단에 영상신호를 인가하게 한 증폭수단과, 능동소자를 통하여 화면의 콘트라스트를 조정하게 한 콘트라스트 조정단으로 구비된 회로에 있어서, 상기한 증폭수단 및 큰트라스트 조정수단의 출력측 사이에 구성되어 브라운관의 애노우드측에 인가되는 고압이 제어소자를 통하여 상기한 증폭수단 및 콘트라스트 조정수단의)출력을 제어시켜 브라운관의 영상신호 레벨 및 콘트라스트를 자동으로 조정하게한 제어수단으로 된 .것을 특징으로한 자동휘도 제한회로.A circuit comprising amplifying means for amplifying a video signal to apply a video signal to a rear stage and a contrast adjusting stage for adjusting the contrast of a screen through an active element, the output side of the amplifying means and the large contrast adjusting means. A control means for automatically adjusting the video signal level and contrast of the CRT by controlling the output of the amplifying means and the contrast adjusting means through the control element through the control element. Features automatic brightness limit circuit. 제 1 항에 있어서, 증폭수단은 전원(B+)이 바이어스 저항(R3-R8) 및 콘덴서 (C1)를 통하여 트랜지스터(Q2-Q4)를 구동하게 구성한후 입력단자(I1)에 인가된 비데오 신호가 차동증폭응 트랜지스터 (Q2-Q4)를 통하여 증폭되게 구성하되 전원(B+)이 바이어스저항(R8-R10)을 통하여 트랜지스터(Q5)를 구동시커 트랜지스터 (Q3)의 바이어스 전압이 안정되게 구성시킨 자동휘도 제한회로.The method of claim 1, wherein the amplifying means includes power supply after (B +) is configured to drive the bias resistors (R 3 -R 8) and a capacitor transistor (Q 2 -Q 4) via a (C 1) an input terminal (I 1) The video signal applied to the amplifier is configured to be amplified through the differential amplifier transistors Q 2 -Q 4 , but the power supply B + drives the transistor Q 5 through the bias resistors R 8 -R 10 . 3 ) Automatic luminance limiting circuit composed of stable bias voltage. 제 1 항에 있어서, 콘트라스트 조정수단은 전원(B+)이 바이어스 저항(R1) (R2) 및 가변저항(VR1)을 통하여 트랜지스터 (Q1)를 구동시켜 화면의 콘트라스트가 조정되게 구성시킨 자동휘도 제한회로.The contrast adjustment means is configured such that the power supply B + drives transistor Q 1 through bias resistor R 1 (R 2 ) and variable resistor VR 1 to adjust the contrast of the screen. Automatic brightness limit circuit. 제 1 항, 제 2 항 또는 제 3 항에 있어서, 저항(R12)과 플라이백 트랜스(FBT) 및 다이오드(D1)를 통하여 브라운관의 애노우드측에 고압을 인가하는 전원(B+)이 바이어스 저항(R13-R16) 및 다이오드(D2)를 통하여 연속 구동하는 트랜지스터(Q6)(Q7)를 구동시켜 상기한 콘트라스트 조정수단과 증폭수단의 트랜지스터(Q1)(Q5)가 자동으로 제어되게 구성시킨 자동휘도 제한회로.Of claim 1, claim 2 or claim 3, the resistance (R 12) and a flyback transformer (FBT) and a diode power supply for applying a high voltage to the anode side of the cathode-ray tube through a (D 1) (B +) and a bias in resistors (R 13 -R 16) and a diode (D 2) a continuous driving transistor (Q 6) (Q 7) to the transistor (Q 1) (Q 5) of the above-described contrast adjusting means and amplifying means for driving through the Automatic brightness limit circuit configured to be controlled automatically. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880004167A 1988-04-12 1988-04-12 Brightness limitation circuit KR910007545B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880004167A KR910007545B1 (en) 1988-04-12 1988-04-12 Brightness limitation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880004167A KR910007545B1 (en) 1988-04-12 1988-04-12 Brightness limitation circuit

Publications (2)

Publication Number Publication Date
KR890016844A true KR890016844A (en) 1989-11-30
KR910007545B1 KR910007545B1 (en) 1991-09-27

Family

ID=19273599

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880004167A KR910007545B1 (en) 1988-04-12 1988-04-12 Brightness limitation circuit

Country Status (1)

Country Link
KR (1) KR910007545B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990055688A (en) * 1997-12-27 1999-07-15 김영환 ACL compensation circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990055688A (en) * 1997-12-27 1999-07-15 김영환 ACL compensation circuit

Also Published As

Publication number Publication date
KR910007545B1 (en) 1991-09-27

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