KR900010842Y1 - Crt protecting device for tv - Google Patents

Crt protecting device for tv Download PDF

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Publication number
KR900010842Y1
KR900010842Y1 KR2019870022285U KR870022285U KR900010842Y1 KR 900010842 Y1 KR900010842 Y1 KR 900010842Y1 KR 2019870022285 U KR2019870022285 U KR 2019870022285U KR 870022285 U KR870022285 U KR 870022285U KR 900010842 Y1 KR900010842 Y1 KR 900010842Y1
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KR
South Korea
Prior art keywords
output
protection circuit
vertical
resistors
input terminal
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Application number
KR2019870022285U
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Korean (ko)
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KR890015186U (en
Inventor
김용현
Original Assignee
삼성전자 주식회사
안시환
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Priority to KR2019870022285U priority Critical patent/KR900010842Y1/en
Publication of KR890015186U publication Critical patent/KR890015186U/en
Application granted granted Critical
Publication of KR900010842Y1 publication Critical patent/KR900010842Y1/en

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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
    • H04N3/19—Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages

Abstract

내용 없음.No content.

Description

텔레비전의 씨알티 보호회로Television Protection Circuit

첨부 도면은 본 고안의 실시예 회로도.The accompanying drawings show an embodiment circuit diagram of the present invention.

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

R1-R11: 저항 ZD1: 제너다이오드R 1 -R 11 : resistance ZD 1 : zener diode

PT : X-선 보호회로PT: X-ray protection circuit

본 고안은 씨알티(CRT)를 사용하는 전자기기 특히, 텔레비전의 씨알티에 흐르는 과다한 빔(beam) 전류에 의한 씨알티의 손상을 방지하기 위한 씨알티 보호회로에 관한 것이다.The present invention relates to an electronic device using CRT, in particular, a CALTI protection circuit for preventing damage to CALTI due to excessive beam current flowing to CALTI of a television.

종래의 씨알티수직 출력회로에는 보호회로가 없어 수직편향콘덴서의 단락 등에 의해 씨알티에 과다한 빔전류가 흐르게 되고 이에 의해 씨알티가 파손되는 문제점이 있었다.Since there is no protection circuit in the conventional CTA vertical output circuit, excessive beam current flows to CALTI due to a short circuit of the vertical deflection capacitor, which causes a problem of CALTI being broken.

본 고안은 이와 같은 문제점을 해결하기 위해 X-선 보호회로를 사용하여 씨알티에 과다한 빔전류가 흐를 경우에는 X-선 보호회로를 동작시켜 씨알티가 '오프'되도록 고안한 것으로서, 이하 첨부도면에 의해 본 고안의 구성 및 작용효과를 상세히 설명한다.In order to solve this problem, the present invention is designed to operate the X-ray protection circuit to 'off' the X-ray protection circuit when excessive beam current flows through the X-ray protection circuit. By the configuration and effect of the present invention will be described in detail.

저항(R1-R7), 가변저항(VR1), 콘덴서(C2) (C3), 수직출력용 IC(VT)및 수직출력구동용 IC(VD)로 된 출력부(1)의 출력이 씨알티(CT)의 수직편향코일(DY)에 인가되는 텔레비전의 씨알티수직 출력회로에 있어서, 플라이백 트랜스(T1)의 2차측 전압이 다이오드(D1), 콘덴서(C1) 및 저항(R10) (R11)으로 된 전원부(2)를 통해 X-선 보호회로(PT)이 기준전압입력단자(I1)에 인가되고 출력부(1)의 출력이 저항(R8) (R9) 및 제너다이오드(ZD1)로 된 제어부(3)에 인가되며 이 제어부(3)의 출력이 X-선 보호회로 (PT)의 비교전압 입력단자(I2)에 인가되게 구성한다.Output of output section 1 consisting of resistors (R 1 -R 7 ), variable resistors (VR 1 ), capacitors (C 2 ) (C 3 ), vertical output IC (VT) and vertical output drive IC (VD) In the SALTI vertical output circuit of a television applied to the vertical deflection coil DY of SALTI, the secondary voltage of the flyback transformer T 1 is a diode D 1 , a capacitor C 1 , and The X-ray protection circuit PT is applied to the reference voltage input terminal I 1 and the output of the output unit 1 is resistor R 8 through the power supply unit 2 composed of resistors R 10 (R 11 ). (R 9 ) and zener diode (ZD 1 ) are applied to the control unit 3, and the output of the control unit 3 is configured to be applied to the comparison voltage input terminal (I 2 ) of the X-ray protection circuit (PT). .

이와 같이 구성되는 본고안에 있어서, 출력부(1)내의 수직출력용IC(VT)에 인가된 수직출력구동용 IC(VD)의 출력이 증폭되어 수직편향콘덴서(C3)를 매개하여 씨알티의 수직편향코일(DY)에 편향코일전류를 공급하고 또한, 저항(R7) 및 콘덴서(C2)에 의해 전압으로 변환되어 수직출력구동용 IC(VD)의 궤환단자(F1)에 궤환되는 한편 저항(R2-R4)으로 분압된 전압이 수직출력용 IC(VT)의 출력단자(O2) 궤환되는데, 이 궤환전압에 의해 편향전류 진폭이 결정된다.In this paper configured as described above, the output of the vertical output driving IC (VD) applied to the vertical output IC (VT) in the output unit 1 is amplified and vertically through the vertical deflection capacitor (C 3 ). The deflection coil current is supplied to the deflection coil DY, and is converted into a voltage by the resistor R 7 and the capacitor C 2 and fed back to the feedback terminal F 1 of the vertical output driving IC VD. The voltage divided by the resistors (R 2 -R 4 ) is fed back to the output terminal (O 2 ) of the IC (VT) for vertical output, and the deflection current amplitude is determined by this feedback voltage.

또한, 플라이백트랜스(T1)의 2차측 전압이 전원부(2)에 인가되면 다이오드 (D1) 및 콘덴서(C1)에 의해 정류되고 저항(R10) (R11)으로 분압되어 X-선 보호회로 (PT)의 기준전압 입력단자(I1)에 인가되고, 비교전압 입력단자(I2)에는 제어부(3)내의 제너다이오드(ZD1)의 캐소우드 전압이 인가되는데, 정상상태에서는 비교전압이 기준전압보다 높게 설정되어 있다.In addition, when the secondary voltage of the flyback transformer T 1 is applied to the power supply unit 2, it is rectified by the diode D 1 and the capacitor C 1 , divided by the resistor R 10 (R 11 ), and divided by X−. The reference voltage input terminal I 1 of the line protection circuit PT is applied, and the cathode voltage of the zener diode ZD 1 in the control unit 3 is applied to the comparison voltage input terminal I 2 . The comparison voltage is set higher than the reference voltage.

이상태에서, 수직편향콘덴서(C3)의 단락동에 의해 출력부(1)에서 과다한 전류가 출력되면 출력전류의 일부가 제어부(3)에 인가되고 이 전류에 의해 저항(R8) 양단에 전압강하가 발생하여 제너다이오드(ZD1)의 캐소우드 전위가 낮아지게 되어 X-선 보호회로(PT)의 기준전압 입력단자(I1)에 인가되는 기준전압보다 비교전압 입력단자(I2)에 인가되는 비교전압이 낮게되어 X-선 보호회로(PT)가 작동하여 씨알티에 전원을 차단함에 따라 씨알티의 화면이 '오프'되어 과다한 수직편향코일 전류에 의해 발생하는 씨알티의 손상을 방지할 수 있다.In this state, if an excessive current is output from the output unit 1 by the short-circuit movement of the vertical deflection capacitor C 3 , a part of the output current is applied to the control unit 3 and the voltage across the resistor R 8 by this current. the drop occurs in the zener diode (ZD 1) the cathode potential is lowered in the X- ray protection circuit (PT) a reference voltage input terminal (I 1), the comparison voltage input terminal than the reference voltage applied to the (I 2) of As the applied comparative voltage is lowered and the X-ray protection circuit (PT) is operated to cut off the power to the CALTI, the screen of the CALTI is 'off' to prevent damage to the CALTI caused by excessive vertical deflection coil current. Can be.

이와 같이 본 고안은 수직편향콘텐서의 단락 등에 의해 수직편향 코일에 과다한 전류가 흘러 씨알티가 파손되는 것을 방지할 수 있어 제품의 신뢰성향상을 이룩한 유용한 고안이다.As such, the present invention is a useful design that achieves improved reliability of the product by preventing excessive current from flowing through the vertical deflection coil due to a short circuit of the vertical deflection capacitor.

Claims (1)

저항(R1-R7), 가변저항(VR1), 콘덴서(C2) (C3), 수직출력용 IC(VT) 및 수직출력구동용 IC(VD)로 된 출력부(1)의 출력이 씨알티(CT)의 수직편향코일(DY)에 인가되는 텔레비전의 씨알티수직 출력회로에 있어서, 플라이백트랜스(T1)의 2차측 전압이 다이오드(D1), 콘덴서(C1) 및 저항(R10) (R11)으로 된 전원부(2)를 통해 X-선보호회로 (DT)의 기준전압 입력단자(I1)에 인가되고 출력부(1)의 출력이 저항(R8) (R9) 및 제너다이오드(ZD1)로 된 제어부(3)에 인가되며 이 제어부(3)의 출력이 X-선 보호회로 (PT)의 비교전압 입력단자(I2)에 인가되게 구성함을 특징으로 하는 텔레비젼의 씨알티 보호회로.Output of output unit 1 consisting of resistors (R 1 -R 7 ), variable resistors (VR 1 ), capacitors (C 2 ) (C 3 ), vertical output IC (VT) and vertical output drive IC (VD) In the SALTI vertical output circuit of a television applied to the vertical deflection coil DY of SALTI, the secondary voltage of the flyback transformer T 1 is a diode D 1 , a capacitor C 1 , and It is applied to the reference voltage input terminal I 1 of the X-ray protection circuit DT through a power supply unit 2 composed of resistors R 10 (R 11 ) and the output of the output unit 1 is a resistor R 8 . (R 9 ) and Zener diode (ZD 1 ) is applied to the control unit 3, the output of the control unit 3 is configured to be applied to the comparison voltage input terminal (I 2 ) of the X-ray protection circuit (PT) A television protection circuit of the TV.
KR2019870022285U 1987-12-17 1987-12-17 Crt protecting device for tv KR900010842Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870022285U KR900010842Y1 (en) 1987-12-17 1987-12-17 Crt protecting device for tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870022285U KR900010842Y1 (en) 1987-12-17 1987-12-17 Crt protecting device for tv

Publications (2)

Publication Number Publication Date
KR890015186U KR890015186U (en) 1989-08-12
KR900010842Y1 true KR900010842Y1 (en) 1990-11-30

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KR2019870022285U KR900010842Y1 (en) 1987-12-17 1987-12-17 Crt protecting device for tv

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