KR920000911Y1 - High voltage stabilization circuit for tv - Google Patents

High voltage stabilization circuit for tv Download PDF

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KR920000911Y1
KR920000911Y1 KR2019870005044U KR870005044U KR920000911Y1 KR 920000911 Y1 KR920000911 Y1 KR 920000911Y1 KR 2019870005044 U KR2019870005044 U KR 2019870005044U KR 870005044 U KR870005044 U KR 870005044U KR 920000911 Y1 KR920000911 Y1 KR 920000911Y1
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transistor
voltage
collector
base
current
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KR2019870005044U
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KR880020762U (en
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이기종
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대우전자 주식회사
김용원
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H04N3/185—Maintaining dc voltage constant
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/005—Power supply circuits

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

내용 없음.No content.

Description

TV 및 모니터의 고압 안정화회로High Voltage Stabilization Circuit for TV and Monitor

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

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

TR1, TR2, TR3 : 트랜지스터 D1 : 제너 다이오드TR1, TR2, TR3: Transistor D1: Zener Diode

R5 : 블리더(bleeder)저항 FBT : 플라이백 트랜스포머R5: Bleeder Resistor FBT: Flyback Transformer

본 고안은 일반 TV 및 모니터에 있어서, 비임(beam)전류의 증감에 따라 발생하는 플라이백 트랜지포머의 출력전압 변동을 방지하기 위한 모니터 및 TV의 고압안정화 회로에 관한 것이다.The present invention relates to a high-voltage stabilization circuit of a monitor and a TV for preventing variation in the output voltage of a flyback transistor generated in the beam (beam) current increase and decrease in a general TV and monitor.

일반적인 TV 및 모니터는 음극선관에 전압을 공급하는 고압 발생장치인 플라이백 트랜스포머로 부터 나오는 고압이 비임전류의 증감에 따라 변동하므로서, TV 및 모니터의 화면이 수축되거나 확장되는 등의 단점이 있었다.In general, TVs and monitors have a disadvantage in that the high pressure from the flyback transformer, which is a high voltage generator supplying voltage to the cathode ray tube, changes according to the increase and decrease of the beam current, and thus the screen of the TV and the monitor is contracted or expanded.

이러한 현상을 막기 위하여 종래에는 블리더 저항등을 사용하여 비임전류의 증감에 따른 플라이백 트랜스포머의 출력전압 변동을 막고 있으나, 상기와 같은 문제점을 근본적으로 해결할 수 없었다.In order to prevent this phenomenon, conventionally, a bleeder resistor is used to prevent fluctuations in the output voltage of the flyback transformer due to the increase or decrease of the beam current, but the above problems cannot be fundamentally solved.

본 고안은 이러한 점에 착안하여 안출한 것으로, 트랜지스터를 간단한 회로를 구성하여 비임전류의 증감에 따라 변동되는 플라이백 트랜스포머의 출력전압을 안정시켜, TV 및 모니터의 음극선관에 항상 일정한 전압을 공급하도록 하므로서, 보다 안정되고, 선명한 화면을 사용자에게 제공하는데, 본고안의 목적이 있다.The present invention has been devised in view of this point, and the transistor is composed of a simple circuit so as to stabilize the output voltage of the flyback transformer that varies with the increase and decrease of the beam current, so that the constant voltage is always supplied to the cathode ray tube of the TV and the monitor. Therefore, to provide a more stable and clear screen to the user, the purpose of this paper.

이하 본고안의 구성 및 작용효과를 첨부 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration and effect of the present invention will be described in detail with reference to the accompanying drawings.

저항(R1)(R2)을 통해 베이스와 에미터가 전원(V1)과 접속된, 트랜지스터(TR2)의 콜렉터를 에미터가 저항(R4)을 통해 접지된 트랜지스터(TR1)의 베이스와 접속하고, 상기 트랜지스터(TR1)의 콜렉터는 플라이백 트랜스포머(FBT)와 전원(V2)과 접속된 저항(R3)과 연결되어 있으며, 트랜지스터(TR2)의 베이스와 콜렉터가 연결되어 있는 트랜지스터(TR3)의 에미터를 제너 다이오드(D1)를 통하여 접지하고, 상기 트랜지스터 (TR3)의 베이스는 플라이백 트랜스포머(FBT)의 블리더저항(R5)과 연결된, 저항(R6)과 연결되고, 상기 저항(R6)은 접지된, 저항(R7)과 접속되어 구성된, 본고안은 고압출력단(HV)의 전압이 설정치보다 감소할 경우, 트랜지스터(TR3)의 바이어스 변동으로 인해, 상기 트랜지스터(TR3)의 베이스전류(iB3)가 감소함에 따라 콜렉터전류(iC3)가 감소하면 자동적으로 트랜지스터(TR2)의 베이스전류(iB2) 역시 감소하게 된다.Resistance (R 1) a grounded transistor (R 2) the emitter to the collector of the base and the emitter connected to the power (V 1), a transistor (TR 2) through a through a resistor (R 4) (TR 1) The collector of the transistor TR 1 is connected to a flyback transformer FBT and a resistor R 3 connected to a power supply V 2. The base and the collector of the transistor TR 2 The emitter of the connected transistor TR 3 is grounded through a zener diode D 1 , and the base of the transistor TR 3 is connected to the bleeder resistor R 5 of the flyback transformer FBT. is coupled with (R 6), the resistor (R 6) is constructed is connected to the ground, a resistor (R 7), the subject innovation is when the voltage of the high voltage output (HV) lower than the set value, the transistor (TR 3) due to the variation of the bias, the base current of the transistor (TR 3) collector current, as (iB 3) is reduced (iC 3) Automatically by the base current (iB 2) of the transistor (TR 2) If the reduction is also reduced.

한편 트랜지스터(TR2)의 입력전류(iB2)가 감소함에 따라 트랜지스터(TR2)의 입력전류인 트랜지스터(TR2)의 콜렉터전류(iC2), 즉 콜렉터 항복전압이 2000V 이상인 트랜지스터(TR1)의 베이스전류(iB1)가 감소하므로, 콜렉터전류(iC1)는 감소하는 반면, 상기 트랜지스터(TR1)의 콜렉터와 에미터간의 전압(VCE)은 증가하게 되므로, 플라이백 트랜스포머(FBT)로 부터 발생되는 고압은 트랜지스터(TR1)의 콜렉터와 에미터간의 전압(VCE)증가분 만큼 증가하게 되어, 출력단(HV)의 전압을 항상 일정한 값으로 유지할 수 있다.The input current of the transistor (TR 2) (iB 2) is reduced as according transistor collector current of the transistor (TR 2) the input current (TR 2) (iC 2) , i.e. the transistor (TR 1 or more collector breakdown voltage is 2000V Since the base current (iB 1 ) of) decreases, the collector current (iC 1 ) decreases, whereas the voltage (VCE) between the collector and emitter of the transistor TR 1 increases, so that the flyback transformer (FBT) The high voltage generated from Ω increases by an increase of the voltage VCE between the collector and the emitter of the transistor TR 1 , so that the voltage at the output terminal HV is always maintained at a constant value.

반면, 플라이백 트랜스포머의 출력단(HV)으로 부터 나오는 전압이 증가될 경우에는 트랜지스터(TR2)의 입력전류(iB3)가 증가하게 되므로, 상기 트랜지스터(TR3)의 콜렉터전류(iC3), 트랜지스터(TR2)의 베이스전류(iB2) 및 콜렉터전류(ic2)와 트랜지스터(TR1)의 베이스전류(iB1)가 차례로 증가하게 됨에 따라, 상기 트랜지스터(TR1)의 콜렉터전류(iC1) 역시 증가하게 된다.On the other hand, when the voltage from the output terminal HV of the flyback transformer is increased, the input current iB 3 of the transistor TR 2 increases, so that the collector current iC 3 of the transistor TR 3 , the base current of the transistor (TR 2) (iB 2) and collector current (ic 2) and the transistor (TR 1), as the base current (iB 1) is increased in order of the collector current of the transistor (TR 1) (iC 1 ) will also increase.

이러한 전류의 증가는 트랜지스터(TR1)의 콜렉터와 에미터간의 전압(VCE)을 감소시키게 되어, 결과적으로는 플라이백 트랜스포머(FBT) 출력단(HV)의 출력전압을 낮추게 된다.This increase in current decreases the voltage VCE between the collector and emitter of the transistor TR 1 , resulting in lowering the output voltage of the flyback transformer FBT output terminal HV.

즉, 출력단(HV)의 출력전압이 설정치 보다 낮아질 경우에는 콜렉터 항복전압이 2000V 이상인 트랜지스터(TR1)의 콜렉터와 에미터간의 전압(VCE)이 증가되어, 감소된 전압을 일정한 값으로 끌어올리고, 출력단(HV)의 출력전압이 설정치보다 높은 값을 가진 경우에는 트랜지스터(TR1)의 콜렉터와 에미터간의 전압(VCE)이 입력전류인 베이스전류(iB1)의 증가로 인해 감소되어, 증가된 전압을 일정한 값의 고압으로 끌어내려, TV 및 모니터의 음극선관에 전압을 공급하는 플라이백 트랜스포머(FBT) 출력단(HV)의 전압을 항상 일정한 값으로 유지시킨다.That is, when the output voltage of the output terminal HV becomes lower than the set value, the voltage VCE between the collector and the emitter of the transistor TR 1 having the collector breakdown voltage of 2000V or more is increased, and the reduced voltage is raised to a constant value. When the output voltage of the output terminal HV is higher than the set value, the voltage VCE between the collector and the emitter of the transistor TR 1 decreases due to an increase in the base current iB 1 , which is an input current, and thus increases. The voltage is pulled down to a constant value of high voltage, so that the voltage at the flyback transformer (FBT) output (HV), which supplies the cathode ray tube of the TV and monitor, is always at a constant value.

상기한 바와같이 본 고안은 TV 및 모니터의 화면에 나타내고자 하는 정보의 양과 밝기를 조절함에 따라 비임전류가 증가되어, TV 및 모니터의 음극선관에 고압을 공급하는 고압발생 장치인 플라이백 트랜스포머(FBT)의 출력전압이 변동되므로서, 발생하는 화면의 수축 및 확장현상을 트랜지스터(TR1, RT2, TR3)를 이용한 간단한 회로를 구성하여 플라이백 트랜스포머(FBT)에 연결하므로서, 비임전류의 증감에 관계없이 항상 출력단(HV)의 전압을 일정하게 유지시켜, 음극선관에 항상 일정한 전압을 공급하여 보다 인정되고, 선명한 화면을 제공할 수 있다는 장점이 있다.As described above, the present invention is a flyback transformer (FBT), which is a high-pressure generator that supplies high pressure to cathode ray tubes of TVs and monitors by increasing the beam current by adjusting the amount and brightness of information to be displayed on TV and monitor screens. As the output voltage of the circuit changes, the contraction and expansion of the generated screen is formed into a simple circuit using transistors TR 1 , RT 2 , and TR 3 , and connected to the flyback transformer FBT to increase or decrease the beam current. Regardless, there is an advantage in that the voltage at the output terminal HV is always kept constant, and a constant voltage is always supplied to the cathode ray tube to provide a more recognized and clear screen.

Claims (1)

저항(R1)(R2)을 통해 베이스와 에미터가 전원(V1)과 접속된, 트랜지스터(TR2)의 콜렉터를 에미터가 저항(R4)을 통해 접지된, 트랜지스터(TR1)의 베이스와 접속하고, 상기 트랜지스터(TR1)의 콜렉터는 플라이백 트랜스포머(FBT) 및 전원(V2)과 접속하고, 트랜지스터(TR2)의 베이스와 콜렉터가 접속된, 트랜지스터(TR3)의 에미터를 제너다이오드(D1)를 거쳐 접지하고, 상기 트랜지스터(TR3)의 베이스를 내부에 블리더저항(R5)이 있는 플라이백 트랜스포머(FBT)의 출력단(HV)과 연결된, 저항(R6)과 접속하여 TV 및 모니터의 음극선관에 항상 일정한 고압을 공급하도록 구성된 것을 특징으로 하는 TV 및 모니터의 고압 안정화회로.Resistance (R 1) (R 2) to the base and the emitter power source (V 1) and connected, with the emitter to the collector of the transistor (TR 2) the ground via a resistor (R 4), a transistor (TR 1 through Is connected to the base of the transistor TR 1 , and the collector of the transistor TR 1 is connected to the flyback transformer FBT and the power supply V 2 , and the base and the collector of the transistor TR 2 are connected to the transistor TR 3 . Is connected to the output terminal (HV) of the flyback transformer (FBT) having a bleeder resistor (R 5 ) therein and the base of the transistor (TR 3 ) is grounded through a zener diode (D 1 ). (R 6) and connected to a TV and the TV high-voltage stabilization circuit of a monitor and always according to claim configured to supply a predetermined high voltage to the cathode ray tube of the monitor.
KR2019870005044U 1987-04-10 1987-04-10 High voltage stabilization circuit for tv KR920000911Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019870005044U KR920000911Y1 (en) 1987-04-10 1987-04-10 High voltage stabilization circuit for tv

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Application Number Priority Date Filing Date Title
KR2019870005044U KR920000911Y1 (en) 1987-04-10 1987-04-10 High voltage stabilization circuit for tv

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KR880020762U KR880020762U (en) 1988-11-30
KR920000911Y1 true KR920000911Y1 (en) 1992-01-31

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