KR970004497Y1 - Monitoring blooming effect elimination circuit - Google Patents

Monitoring blooming effect elimination circuit Download PDF

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Publication number
KR970004497Y1
KR970004497Y1 KR92021438U KR920021438U KR970004497Y1 KR 970004497 Y1 KR970004497 Y1 KR 970004497Y1 KR 92021438 U KR92021438 U KR 92021438U KR 920021438 U KR920021438 U KR 920021438U KR 970004497 Y1 KR970004497 Y1 KR 970004497Y1
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South Korea
Prior art keywords
blooming
resistor
transistor
monitoring
rgb
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KR92021438U
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Korean (ko)
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KR940014050U (en
Inventor
안흥식
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배순훈
대우전자 주식회사
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Priority to KR92021438U priority Critical patent/KR970004497Y1/en
Publication of KR940014050U publication Critical patent/KR940014050U/en
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Publication of KR970004497Y1 publication Critical patent/KR970004497Y1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/62—Detection or reduction of noise due to excess charges produced by the exposure, e.g. smear, blooming, ghost image, crosstalk or leakage between pixels
    • 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

Abstract

내용없음.None.

Description

모니터의 블루밍 현상 제거회로Blooming phenomenon elimination circuit of monitor

제1도는 본 고안에 따른 모니터의 블루밍 현상 제거 회로도1 is a circuit diagram of the blooming phenomenon of the monitor according to the present invention

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : R. G. B 증폭부 20 : 블루밍 제어부10: R. G. B amplification unit 20: blooming control unit

Y1 : R. G. B 영상신호 입력단 Out : 증폭신호 출력단Y1: R. G. B video signal input terminal Out: Amplified signal output terminal

Q1-Q3 : 제1-제3트랜지스터 C1 : 제1콘덴서Q1-Q3: First to third transistor C1: First capacitor

R1-R4 : 제1-제4저항 Vcc : 고압 전원단R1-R4: first-fourth resistor Vcc: high voltage power supply terminal

본 고안은 텔레비젼 수상기(이하, TV라함)의 모니터에 관한 것으로, 특히 출력전원의 온 동작시에 순간적인 브라운관의 빔출력이 고압이 되어, 콘트라스트 레벨이 높아짐으로써, 브라운관으로 출력되는 이상 현상을 제거하도록 구성된 모니터의 블루밍 현상 제거회로에 관한 것이다.The present invention relates to a monitor of a television receiver (hereinafter referred to as a TV). Particularly, a beam output of a CRT becomes instantaneously high when the output power is turned on, and the contrast level is increased, thereby eliminating an abnormal phenomenon output to the CRT. And a blooming cancellation circuit of the monitor.

일반적으로, TV의 전원이 온상태에서 일정한 콘트라스트 전압, 브라이트 전압이 될때까지 시간이 지체되며, 이 순간동안 색번짐 현상(Blooming Effect)이 발생한다.In general, time is delayed until a constant contrast voltage and a bright voltage are reached when the TV is turned on, and a blooming effect occurs during this moment.

종래에는, 위와 같은 색번짐 현상을 해소하기 위해서 TV 전원의 온시에 마이콤에서 영상 뮤트신호를 R. G. B 출력단으로 출력하여 화면을 블록상태로 만들어 색번짐 현상을 안보이게 한 것으로, 이럴 경우에는 TV전원의 온시에 화면이 늦게 입력됨으로써, 시청자에게 양질의 서비스를 제공하지 못하였다.Conventionally, in order to eliminate the color bleeding as described above, the microcomputer outputs a video mute signal to the RG B output terminal when the TV power is turned on so that the screen is blocked so that the color bleeding phenomenon is not seen. Due to this late input, the service could not be provided to the viewers.

그리고, 색번짐 현상이 출력되는 상태로 세트를 구성하여 만들 경우, TV의 전원이 안정된 뒤(예열후)에는 문제가 없지만, 위와 같은 TV전원의 온시(COLD START)에, 시방서에 명시되어 있는 빔(Beam)량 보다 많은 빔의 량의 브라운관이나 모니터에 이상 현상을 초래하므로 부품의 수명이 단축되는 문제점이 있었다.When the set is made with the color bleeding output, there is no problem after the TV power is stabilized (after preheating), but the beam specified in the specification at the time of cold start of the TV power as described above ( There is a problem that the life of the component is shortened because it causes an abnormal phenomenon in the CRT or monitor of the amount of beam more than the amount of beam).

이에, 본 고안은 위와 같은 점을 감안하여 안출된 것으로 TV전원의 온시에, 음극선관 출력전압을 검출하고, 그 전압이 고압인 경우에 콘트라스트 레벨을 강하시켜 모니터에 출력되는 블루밍 현상과 같은 이상 현상을 제거할 수 있는 모니터의 블루밍 현상 제거회로를 제공함을 그 목적으로 한다.Therefore, the present invention was conceived in view of the above, and when the TV power is turned on, the cathode ray tube output voltage is detected, and when the voltage is high, an abnormal phenomenon such as blooming phenomenon is output to the monitor by lowering the contrast level. It is an object of the present invention to provide a blooming phenomenon elimination circuit of a monitor which can eliminate the problem.

이하, 본 고안을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings the present invention will be described in detail.

제1도는 본 고안에 따른 모니터의 블루밍 현상 제거 회로도이다.1 is a blooming diagram of a blooming phenomenon of the monitor according to the present invention.

우선, 구성을 살펴보자면, 제1도에 도시된 바대로, 본 고안의 모니터의 블루밍 현상 제거회로는 제4저항(R4), 증폭용 트랜지스터인 제1, 제2트랜지스터(Q1, Q2), 바이어스 저항인 제1, 제2지항(R1, R2)으로 이루어져, 입력된 R. G. B. 색신호를 2단 증폭하여 출력단으로 전송하는 R. G. B. 증폭수단(10), 전원단(B+)에 직렬로 제3저항(R3)과 제1콘덴서(C1)를 연결하고, 에미터가 접지된 제3트랜지스터(Q3)로 구성되어, 상기 R. G. B. 증폭수단(10)의 일측단에 콘덴서의 충전동작을 이용하여 시간 지연시키는 블루밍 제어수단(20)으로 구성된다.First, as shown in FIG. 1, the blooming phenomenon removing circuit of the monitor according to the present invention includes a fourth resistor R4, an amplifying transistor, first and second transistors Q1 and Q2, and a bias. A third resistor R3 in series with the power supply terminal B + and the RGB amplifying means 10 which consists of first and second resistors R1 and R2 which are resistors and amplifies the input RGB color signal by two stages and transmits it to the output stage. Blooming control means for connecting the first capacitor (C1) and the emitter is grounded by a third transistor (Q3), the time delay using the charging operation of the capacitor at one end of the RGB amplification means (10) It consists of 20.

위와 같이 구성된 본 고안의 동작, 효과를 제1도를 참조하여 상세히 설명한다.The operation and effects of the present invention configured as described above will be described in detail with reference to FIG.

TV전원의 온시(COLD START)에, 위의 블루밍 제어부(20)의 제3콘덴서(Q3)에 먼저 충전되고, 이 충전시간동안에는 12V의 지연 동작에 의해 제3트랜지스터(Q3)는 도통하지 못하여, 제1저항(R1)의 전류치가 감소함으로써, 제1, 제2트랜지스터(Q1)의 콜렉터 전류(1c)는 감소하게 되어, 브라운관으로 미약한 증폭신호를 출력시킴으로써, 블루밍현상을 억제할 수 있다.When the TV power is on (COLD START), the third capacitor Q3 of the blooming control unit 20 is first charged, and during this charging time, the third transistor Q3 cannot conduct due to the delay operation of 12V. As the current value of the first resistor R1 decreases, the collector current 1c of the first and second transistors Q1 decreases, so that the blooming phenomenon can be suppressed by outputting a weak amplified signal to the CRT.

TV전원의 온시에, 제1콘덴서(C1)의 충전시간후에는 제1트랜지스터(Q1)를 도통시키게 되고, 위의 R. G. B. 증폭부(10)는 제1저항(R1)의 전류치의 변화에 따라 제2트랜지스터(Q2)의 동작을 제어하며, 위의 R. G. B. 영상신호는 제1트랜지스터(Q1)의 콜렉터에 제4저항(R4)을 통해 연결된 고압 전원부(Vcc)로부터 출력되는 고압에 실려 안정하게 브라운관으로 증폭되어 출력된다.When the TV power is turned on, after the charging time of the first capacitor C1, the first transistor Q1 is turned on, and the RGB amplifying unit 10 changes the current value of the first resistor R1 according to the change of the current value of the first resistor R1. 2 controls the operation of transistor Q2, and the above RGB image signal is stably loaded on the high voltage output from the high voltage power supply unit Vcc connected to the collector of the first transistor Q1 through the fourth resistor R4. Amplified and output.

위와 같이, 본 고안은 TV전원의 온시에, 브라운관에 이상 전류의 흐름을 제어함으로써, 브라운관을 보호할수 있고, 소비자들이 전원의 온시에 느낀느 불쾌감을 줄일 수 있는 효과가 있다.As described above, the present invention can protect the CRT by controlling the flow of an abnormal current in the CRT at the time of power supply of the TV, thereby reducing the discomfort felt by the consumer when the power is on.

Claims (1)

제4저항(R4), 증폭용 트랜지스터인 제1, 제2트랜지스터(Q1, Q2), 바이어스 저항인 제1, 제2저항(R1, R2)으로 이루어져, 입력된 R. G. B. 색신호를 2단 증폭하여 출력단으로 전송하는 R. G. B. 증폭수단(10), 전원단(B+)에 직렬로 제3저항(R3)과 제1콘덴서(C1)를 연결하고, 에미터가 접지된 제3트랜지스터(Q3)로 구성되어, 상기 R. G. B. 증폭수단(10)의 일측단에 콘덴서의 충전동작을 이용하여 시간 지연지키는 블루밍 제어수단(20), 으로 구성된 모니터의 블루밍 현상 제거회로A fourth resistor R4, the first and second transistors Q1 and Q2 serving as an amplifying transistor, and the first and second resistors R1 and R2 serving as bias resistors are used to amplify the input RGB color signal by two stages. The third transistor (Q3) is connected to the third resistor (R3) and the first capacitor (C1) in series with the RGB amplifying means (10) to be transmitted to the power supply terminal (B +), the emitter is grounded, Blooming phenomenon removing circuit of the monitor consisting of a blooming control means 20, which delays the time by using the charging operation of the condenser at one end of the RGB amplification means 10,
KR92021438U 1992-11-03 1992-11-03 Monitoring blooming effect elimination circuit KR970004497Y1 (en)

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KR92021438U KR970004497Y1 (en) 1992-11-03 1992-11-03 Monitoring blooming effect elimination circuit

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Application Number Priority Date Filing Date Title
KR92021438U KR970004497Y1 (en) 1992-11-03 1992-11-03 Monitoring blooming effect elimination circuit

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KR940014050U KR940014050U (en) 1994-06-29
KR970004497Y1 true KR970004497Y1 (en) 1997-05-12

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