KR870000552B1 - High-voltage stabilized circuit - Google Patents

High-voltage stabilized circuit Download PDF

Info

Publication number
KR870000552B1
KR870000552B1 KR1019840000852A KR840000852A KR870000552B1 KR 870000552 B1 KR870000552 B1 KR 870000552B1 KR 1019840000852 A KR1019840000852 A KR 1019840000852A KR 840000852 A KR840000852 A KR 840000852A KR 870000552 B1 KR870000552 B1 KR 870000552B1
Authority
KR
South Korea
Prior art keywords
voltage
flyback transformer
circuit
horizontal deflection
secondary winding
Prior art date
Application number
KR1019840000852A
Other languages
Korean (ko)
Other versions
KR840008559A (en
Inventor
가쓰미 이시까와
노부히꼬 사에구사
Original Assignee
파이오니아 가부시끼가이샤
마쓰모도 세이야
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 파이오니아 가부시끼가이샤, 마쓰모도 세이야 filed Critical 파이오니아 가부시끼가이샤
Publication of KR840008559A publication Critical patent/KR840008559A/en
Application granted granted Critical
Publication of KR870000552B1 publication Critical patent/KR870000552B1/en

Links

Images

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

A horizontal detection circuit applies a flyback pulse across the primary coil of a flyback transformer. A second horizontal deflection circuit supplies a second flyback pulse to a lower voltage side of the secondary coil of the flyback transformer through a coupling capacitor. The seocndary coil of the flyback transformer is serially connected with a dummy coil to add an induced high voltage across the secondary coil to the second pulse across the dummy coil. The summed voltage is rectified by diodes. A DC voltage supplied to the second horizontal deflection circuit is controlled in response to the output voltage of the seocndary coil of the flyback transformer.

Description

고압 안정화회로High pressure stabilization circuit

제1도는 종래의 고압 안정화회로의 회로도.1 is a circuit diagram of a conventional high pressure stabilization circuit.

제2도는 본 발명이 1실시예의 회로도.2 is a circuit diagram of one embodiment of the present invention.

제3도는 다른 실시예의 회로도.3 is a circuit diagram of another embodiment.

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

1,2 : 제1 및 제2수평편향회로 4,10 : 댐퍼 다이오우드1,2: First and second horizontal deflection circuits 4,10: Damper diode

5,11 : 공진용 콘덴서 6 : 수평편향 요우크5,11: resonance capacitor 6: horizontal deflection yoke

12 : 더미 요우크 14 : 플라이백 변압기12: dummy yoke 14: flyback transformer

20 : 제어회로 23 : 블리이더 저항20: control circuit 23: bleeder resistor

25 : 다이오우드 26 : ABL용 전류 검출회로25: diode 26: current detection circuit for ABL

본 발명은 텔레비젼 수상기의 고압 안정화회로에 관한 것이다.The present invention relates to a high pressure stabilization circuit of a television receiver.

종래, 수평편향 요우크를 구동하는 제1수평편향회로와 고압안정화를 위한 보정펄스를 발생시키는 제2수평편향회로를 가진 고압 안정화회로가 있다.Conventionally, there is a high voltage stabilization circuit having a first horizontal deflection circuit for driving a horizontal deflection yoke and a second horizontal deflection circuit for generating a correction pulse for high pressure stabilization.

이 고압 안정화회로는 제1도에 표시한 바와 같이, 트랜지스터(3), 댐퍼 다이This high voltage stabilization circuit, as shown in FIG. 1, has a transistor 3 and a damper die.

또한 17은 플라이백 변압기(14)의 3차 권선이다.17 is the tertiary winding of the flyback transformer 14.

상기와 같이 구성된 종래의 고압 안정화회로에 수평드라이브 펄스(18)를 공급하면, 제1수평편향회로(1)는 편향요우크(6)에 구동하는 동시에 수평귀선기간에 공진콘덴서(5)와 편향요우크(6)에 의해서 공진된 플라이백 펄스전압(Vp1)을 1차 권선(15)을 통하여 2차 권선(16)에 발생시켜, 브라운관의 양극전압을 생성시킨다. 이 경우에 제1수평편향회로(1)에는 직류공급전원(19)으로부터 일정한 직류전압이 공급되어 있기 때문에 플라이백 펄스 전압(Vp1)의 변화는 없으며, 2차 권선(16)의 출력전압의 변화도 없었다.When the horizontal drive pulse 18 is supplied to the conventional high voltage stabilization circuit configured as described above, the first horizontal deflection circuit 1 drives the deflection yoke 6 and deflects the resonance capacitor 5 in the horizontal retrace period. The flyback pulse voltage V p1 resonated by the yoke 6 is generated in the secondary winding 16 through the primary winding 15 to generate the anode voltage of the CRT. In this case, since the first horizontal deflection circuit 1 is supplied with a constant DC voltage from the DC power supply 19, there is no change in the flyback pulse voltage V p1 , and the output voltage of the secondary winding 16 There was no change.

또 제2수평편향회로(2)는 수평드라이브 펄스(18)에 의해 구동되어 수평귀선기간에 공진콘덴서(11)와 더미요우크(12)에 의해 공진된 플라이백 펄스전압(Vp2)을p2 The second horizontal deflection circuit 2 is driven by the horizontal drive pulse 18 to p2 the flyback pulse voltage V p2 resonated by the resonance capacitor 11 and the dummy yoke 12 during the horizontal retrace period.

플라이백 펄스전압(Vp2)은The flyback pulse voltage (V p2 )

Figure kpo00001
Figure kpo00001

로 표시된다.Is displayed.

Vcc는 제어회로(20)를 통하여 공급되는 전압을, LD는 더미요우크(12)의 인덕턴스를, CS2는 공진콘덴서(11)의 용량을, tH는 수평편향기간(63.5㎲)을 표시하고 있다. 따라서 VCC를 변화하므로서 플라이백 펄스 전압(Vp2)을 변화시킬 수 있다.V cc is the voltage supplied through the control circuit 20, L D is the inductance of the dummy yoke 12, C S2 is the capacitance of the resonant capacitor 11, tH is the horizontal deflection period (63.5 kV) It is displaying. Therefore, the flyback pulse voltage (V p2 ) can be changed by changing V CC .

지금 브라운관(도시않음)의 휘도가 상승하고 2차 권선(16)의 부하전류가 증가하면 2차 권선(16)의 출력전압(21)은 저하한다. 2차 권선(16)의 출력전압(21)의 저하는 블리이더 저항(23)에 의해 검출되고, 제어회로(20)는 제2수평편향회로(2)에 공급하는 직류전압을 증가시킨다. 따라서 2차 권선(16)에 공급되는 플라이백 펄스(Vp2)의 전압은 2차 권선(16)의 출력전압(21)의 저하분만큼 증가하여 2차 권선(16)의 출력전압(21)의 저하분은 보상된다. 또 반대로 2차 권선(16)의 출력전압(21)이 증가하면 이 증가는 블리이더 저항(23)에 의하여 검출되고 제어회로(20)는 제2수평편향회로(2)에 공급하는 직류전압을 저하시킨다. 따라서 2차 권선(16)에 공급되는 플라이백 펄스전압(Vp2)의 전압은 2차 권선(16)의 출력전압(21)의 증가분이 보상되어서 2차 권선(16)의 출력전압(21)은 일정하게 유지되며 고압전압이 안정If the luminance of the CRT (not shown) rises now and the load current of the secondary winding 16 increases, the output voltage 21 of the secondary winding 16 decreases. The decrease in the output voltage 21 of the secondary winding 16 is detected by the bleeder resistor 23, and the control circuit 20 increases the DC voltage supplied to the second horizontal deflection circuit 2. Therefore, the voltage of the flyback pulse V p2 supplied to the secondary winding 16 increases by the decrease of the output voltage 21 of the secondary winding 16, thereby outputting the output voltage 21 of the secondary winding 16. The decrease in is compensated for. On the contrary, if the output voltage 21 of the secondary winding 16 increases, this increase is detected by the bleeder resistor 23 and the control circuit 20 supplies the DC voltage supplied to the second horizontal deflection circuit 2. Lowers. Therefore, the voltage of the flyback pulse voltage V p2 supplied to the secondary winding 16 is compensated for the increase of the output voltage 21 of the secondary winding 16, so that the output voltage 21 of the secondary winding 16 is compensated for. Is kept constant and high voltage is stable

그런데 상기한 바와 같이 종래의 고압 안정화회로에 의할 때에는 이상태 그대로는 플라이백 변압기의 2차 측으로부터 수μA 내지 수 mA의 자동휘도 리미터(이하 ABL이라고 기재함)용의 전류신호를 검출할 수 없는 결점이 있었다.As described above, however, in the conventional high voltage stabilization circuit, it is not possible to detect a current signal for an auto luminance limiter (hereinafter referred to as ABL) of several μA to several mA from the secondary side of the flyback transformer as it is. There was a flaw.

본 발명은 상기한 바를 감안하여 이루어진 것으로 상기의 결점을 해소하여 자동휘도 리미터용의 전류신호를 검출할 수 있는 고압 안정화회로를 제공하는 것을 목적으로 한다.SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a high pressure stabilization circuit capable of eliminating the above drawbacks and detecting a current signal for an automatic luminance limiter.

다음 본 발명을 실시예에 의하여 설명한다.Next, an Example demonstrates this invention.

제2도는 본 발명의 실시예 회로도이다.2 is an exemplary circuit diagram of the present invention.

본 발명의 1실시예에 있어서 제1도에 표시한 종래의 회로도와 동일 구성요소에는 동일의 부호를 붙여서 표시하였다.In one embodiment of the present invention, the same components as those of the conventional circuit diagram shown in FIG. 1 are denoted by the same reference numerals.

본 발명의 1실시예에 있어서는 제1도에 표시한 종래의 고압 안정화회로에 다시 플라이백 변압기(14)의 2차 권선 저압측에 역류저지용 다이오우드를 통하여 접속한 적분 콘덴서(27)와 직류전압원(19)의 출력단과 적분콘덴서(27)와의 사이에 접속한 ABL용 전류 검출저항(28)으로 이루어진 ABL용 전류 검출회로(26)가 접속되어 있다.In one embodiment of the present invention, the integrating capacitor 27 and the direct current voltage source connected to the conventional high voltage stabilization circuit shown in FIG. An ABL current detection circuit 26 made up of an ABL current detection resistor 28 connected between the output terminal of (19) and the integrating capacitor 27 is connected.

한편 제2수평편향회로(2)로부터의 출력은 결합콘덴서(24)를 통하여 2차 권선(16)의 저압측에 공급하고 있다.On the other hand, the output from the second horizontal deflection circuit 2 is supplied to the low pressure side of the secondary winding 16 via the coupling capacitor 24.

이상과 같이 구성된 본 실시예에 있어서 상기의 제1도에 표시한 것과 마찬가p2 p2 In this embodiment configured as described above, as shown in FIG. 1 above, p2 p2

이것은 제1도에 표시한 종래의 고압 안정화회로의 경우와 마찬가지이다. 그런데 결합콘덴서(24)를 통하여 플라이백 펄스전압(Vp2)의 인가에 의한 플라이백 변압기(14)의 다른 권선에 영향을 주는 일없이 2차 권선(16)의 출력전압(21)을 안정화할 수가 있다. 또 2차 권선(16)의 출력전압(21)이 안정화되므로써 브라운관의 양극전압이 안정화되는 것은 물론이다.This is the same as in the case of the conventional high pressure stabilization circuit shown in FIG. However, through the coupling capacitor 24, the output voltage 21 of the secondary winding 16 can be stabilized without affecting other windings of the flyback transformer 14 by the application of the flyback pulse voltage V p2 . There is a number. In addition, of course, the anode voltage of the CRT is stabilized by stabilizing the output voltage 21 of the secondary winding 16.

한편 플라이백 변압기(16)의 양극전류의 변화는 플라이백 변압기(14)의 1차 전류의 변화로서 나타나고 이 1차 전류의 변화는 저항(28)에 의해 검출된다. 또 저항(28)에는 역류저지용의 다이오우드(25)가 접속되어 있기 때문에 플라이백 펄스전압(Vp2)에 의해 영향을 받는 일이 없이 ABL용의 전류변화가 검출된다. 즉 양극전류가 증가하면 저항(28)의 전압강하는 증가하고 ABL용 전류 검출단자(29)의 전압은 저하하여 양극전류가 감소하면 저항(28)의 비데오 신호회로의 콘트라스트 조정회로, 브라이트네스 조정회로의 제어회로에 접속되어, ABL동작이 행하여진다.On the other hand, the change in the anode current of the flyback transformer 16 appears as a change in the primary current of the flyback transformer 14 and this change in the primary current is detected by the resistor 28. Also resistor 28, the current change for ABL without being affected by a flyback pulse voltage (V p2) because it is connected to the diode 25 for preventing reverse flow is detected. That is, when the anode current increases, the voltage drop of the resistor 28 increases, and the voltage of the current detection terminal 29 for ABL decreases, and when the anode current decreases, contrast adjustment circuit and brightness control of the video signal circuit of the resistor 28 are reduced. Connected to the control circuit of the circuit, the ABL operation is performed.

또한, 이상 설명한 실시예에 있어서 적분콘덴서(27)를 접속하여, ABL의 동작을 평균치 ABL로 한 경우를 예시하였으나 적분콘덴서(27)를 삭제하여 피이크 ABL로 하여도 좋다.In the above-described embodiment, the case where the integral capacitor 27 is connected and the operation of the ABL is set to the average value ABL is illustrated, but the integrated capacitor 27 may be deleted to be the peak ABL.

또 상기 실시예에 있어서 ABL용 전류검출을 위한 저항(28)을In the above embodiment, the resistor 28 for detecting the current for ABL is

또 제2수평편향회로(2)에 제1수평편향회로(1)에 공급하는 수평드라이브펄스(18)를 공급한 경우를 예시하였으나 수평드라이브 펄스(18)에 동기한 펄스를 제2수평편향회로(2)에 공급하도록 하여도 좋다.Although the case of supplying the horizontal drive pulse 18 for supplying the first horizontal deflection circuit 1 to the second horizontal deflection circuit 2 is exemplified, a pulse synchronized with the horizontal drive pulse 18 is applied to the second horizontal deflection circuit. You may make it supply to (2).

또 블리이더 저항(23)에 대신하여 ABL용 전류를 검출하여 제어회로(20)를 구동하여 제어회로(20)의 출력으로 제2편향회로(2)에 공급하는 직류전압을 제어하여도 좋고 또 직류전압의 제어에 대신하여 공진콘덴서(11) 또는 더미요우크(12)에 직렬로 예컨대, 가포화(可飽和)리액터를 삽입하여 이것을 제어하여도 좋고 또 다시 제2수평편향회로(2)에 공급하는 수평드라이브 펄스의 듀뮤티비를 제어하도록 하여도 좋다.Alternatively, the DC voltage supplied to the second deflection circuit 2 may be controlled by the output of the control circuit 20 by detecting the ABL current instead of the bleeder resistor 23 to drive the control circuit 20. Instead of the control of the DC voltage, for example, a saturable reactor may be inserted in series with the resonant capacitor 11 or the dummy yoke 12 to control this, and again to the second horizontal deflection circuit 2. The duty cycle of the supplied horizontal drive pulses may be controlled.

이상 설명한 바와 같이 본 발명에 의하면 플라이백 변압기의 2차 권선 저압측에 고압안정화를 위한 제어 전압변화분을 결합콘덴서를 통하여 공급하였기 때문에 플라이백 변압기의 다른 권선에 영향을 주는 일 없이 플라이백 변압기의 2차전압, 즉 브라운관에 공급하는 양극 전압을 안정화 할 수가 있다.As described above, according to the present invention, since the control voltage variation for high pressure stabilization is supplied to the low voltage side of the secondary winding of the flyback transformer through the coupling capacitor, the flyback transformer is not affected by the other windings of the flyback transformer. The secondary voltage, that is, the anode voltage supplied to the CRT can be stabilized.

또 플라이백 변압기의 2차 권선 저압측에 다이오우드를 통하여 ABL용 전류의 검출을 위한 저항을 접속하였기 때문에 양극전류의 미소한 변동을 검출할 수가 있다.In addition, since a resistor for detecting the current for ABL is connected to the low voltage side of the secondary winding of the flyback transformer through the diode, a slight variation in the positive current can be detected.

Claims (1)

플라이백 변압기의 1차 권선에 수평귀선 펄스를 공급하는 제1수평편향회로와, 플라이백 변압기의 2차 권선의 저압측 단자에 결합콘덴서를 통하여 수평귀선 펄스를 공급하는 제2수평편향회로와, 플라이백 변압기의 2차 권선의 출력전압에 대응한 값(値)에 제2수평편향회로와 직류전원전압을 제어하는 제어수단과, 플라이백 변압기의 2차 권선의 저압측단자에 다이오드를 통하여 접속된 플라이백 변압기의 2차측전류의 변화를 검출하는 자동휘도 리미터용 전류 검출회로를 구비하여 이루어진 것을 특징으로 한 고압 안정화회로.A first horizontal deflection circuit for supplying a horizontal retrace pulse to the primary winding of the flyback transformer, a second horizontal deflection circuit for supplying a horizontal retrace pulse to the low voltage terminal of the secondary winding of the flyback transformer through a coupling capacitor; Control means for controlling the second horizontal deflection circuit and the DC power supply voltage to a value corresponding to the output voltage of the secondary winding of the flyback transformer and a low voltage side terminal of the secondary winding of the flyback transformer via a diode. And a current detecting circuit for an automatic luminance limiter for detecting a change in the secondary side current of the flyback transformer.
KR1019840000852A 1983-04-28 1984-02-22 High-voltage stabilized circuit KR870000552B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP73731 1983-04-28
JP58-73731 1983-04-28
JP58073731A JPS59200582A (en) 1983-04-28 1983-04-28 High voltage stabilizing circuit

Publications (2)

Publication Number Publication Date
KR840008559A KR840008559A (en) 1984-12-15
KR870000552B1 true KR870000552B1 (en) 1987-03-18

Family

ID=13526668

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840000852A KR870000552B1 (en) 1983-04-28 1984-02-22 High-voltage stabilized circuit

Country Status (2)

Country Link
JP (1) JPS59200582A (en)
KR (1) KR870000552B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5444655A (en) * 1977-09-09 1979-04-09 Mitsui Toatsu Chem Inc Production of 1-chloroanthroquinone-2-carboxylic acid
JPS5464417A (en) * 1977-10-31 1979-05-24 Sony Corp Generation circuit for high voltage
JPS5753769U (en) * 1980-09-16 1982-03-29
JPS57113579U (en) * 1980-12-29 1982-07-14
JPS5850559U (en) * 1981-09-30 1983-04-05 株式会社日立製作所 Television receiver overload prevention circuit
CH650418A5 (en) * 1982-04-07 1985-07-31 Kh Polt I Im V I Lenina Apparatus for electrochemical cleaning of effluent

Also Published As

Publication number Publication date
JPS59200582A (en) 1984-11-13
KR840008559A (en) 1984-12-15
JPH0326593B2 (en) 1991-04-11

Similar Documents

Publication Publication Date Title
EP0451805A2 (en) Raster size regulating circuit
CA2040253C (en) High voltage stabilization circuit for video display apparatus
US4968106A (en) High voltage generating apparatus for television equipment
CA1213366A (en) Television receiver power supply regulation responding to beam current changes
US4233635A (en) High voltage limiting circuit for a television receiver
KR870000552B1 (en) High-voltage stabilized circuit
US4645989A (en) Frequency switching circuit for multiple scan rate video display apparatus
US4129885A (en) Warm-up compensation system for picture tube
KR870000553B1 (en) High-voltage stabilized circuit
US5142206A (en) Slow turn-on in a deflection circuit
KR870000999Y1 (en) High voltage stabilized circuit
KR0183159B1 (en) Circuit and method for stabilizing high voltage output in television
GB2338615A (en) High voltage power supply circuit
EP0319011B1 (en) High voltage generating apparatus for television equipment
KR900009577Y1 (en) Horizontal deflecting protecting circuit
US3980821A (en) Power supply for a television receiver
KR920004066Y1 (en) High voltage stabilization circuit
US2966624A (en) Circuit arrangement for the automatic voltage regulation of television picture tubes
KR0129496Y1 (en) X-ray preventing device of monitor
KR950000152Y1 (en) High voltage stabilization circuit
KR920000912Y1 (en) High voltage stabilization circuit
EP0453180A2 (en) Stabilized power supply circuit
KR930004819Y1 (en) High voltage stabilization circuit
US6661188B2 (en) Cathode ray tube filament voltage control with a multifrequency deflection scanner
KR100299844B1 (en) High Voltage Stabilization Circuit of Image Display Equipment

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19910320

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee