KR910001467Y1 - High voltage control circuit - Google Patents
High voltage control circuit Download PDFInfo
- Publication number
- KR910001467Y1 KR910001467Y1 KR2019870010286U KR870010286U KR910001467Y1 KR 910001467 Y1 KR910001467 Y1 KR 910001467Y1 KR 2019870010286 U KR2019870010286 U KR 2019870010286U KR 870010286 U KR870010286 U KR 870010286U KR 910001467 Y1 KR910001467 Y1 KR 910001467Y1
- Authority
- KR
- South Korea
- Prior art keywords
- comparator
- resistor
- high voltage
- circuit
- transistor
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
-
- 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
Abstract
내용 없음.No content.
Description
제1도는 종래 고안의 회로도.1 is a circuit diagram of a conventional design.
제2도는 본 고안의 회로도.2 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
가 : 비교기 R1∼R6: 저항: Comparator R 1- R 6 : Resistance
ZD : 제너이다이드 나 : 정전압회로ZD: Zeneride B: Constant Voltage Circuit
C1∼C2: 콘덴서 Q : 트랜지스터C 1 to C 2 : Capacitor Q: Transistor
D1: 다이오드 다 : 수평발진회로D 1 : diode c: horizontal oscillation circuit
본 고안은 CRT를 사용하는 모든 기기에 있어서 플라이백 트랜스에 접속된 전압과 기준전압과의 펑균치 전력읕 비교기에 의해 검출하여 일정전압을 유지함으로써 이상고압으로 발생되는 X-Ray를 방지하기 위한 이상고압 제어장치이다.The present invention is ideal for preventing X-Ray caused by abnormal high voltage by detecting constant voltage by detecting the power equalizer between the voltage connected to the flyback transformer and the reference voltage in all devices using CRT. High pressure control device.
종래에는 제1도에 도시한 바와같이 플라이백 트랜스펄스를 직류로 가변시킨 후에 기준전압과 비교하여 수평발진회로를 온, 오프시킴으로싸 동작하도록 되어있었다.Conventionally, as shown in FIG. 1, the flyback transpulse is varied by direct current, and then operated by turning on and off the horizontal oscillation circuit compared with the reference voltage.
그러나 이와같은 종래의 회로는 기준전압보다 높은 직류가 발생할 경우에는 이 고압으로 인하여 비교기가 파괴되고 또한 이 비교기가 파괴되는 것을 막기위하여 직유의 값을 줄일경우에는 비교기의 기능을 민감하게발휘할 수 없게 되어 이상고압을 방지할 수 없으므로 X-Ray로 인하여 화질이 좋지 못하게 되며 소비자의 시력감퇴현상을 유발하제 되는 문제점을 가지고 있있다.However, in the conventional circuit, when a direct current higher than the reference voltage occurs, the comparator is destroyed due to this high voltage, and the function of the comparator cannot be sensitively exhibited when the value of simile is reduced to prevent the comparator from being destroyed. Since abnormal high pressure cannot be prevented, image quality is poor due to X-Ray and has a problem of causing deterioration of eyesight of consumers.
따라서 본 고안은 상기와 같은 문제점을 해결하기 위하여 플라이백 트랜스의 2차권선 타측단에 전원을 접속시켜 회로의 전체적인 레벨을 평준화 시킴으로써 이상고압발생으로 인한 X-Ray를 방지할 수 있어 CRT의 고화질을 얻을 수 있을뿐만 아니라 소비자의 시력을 보호할 수 있게 한 것으로 이하 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Therefore, in order to solve the above problems, the present invention connects the power supply to the other end of the secondary winding of the flyback transformer to equalize the overall level of the circuit, thereby preventing X-rays due to abnormal high voltage generation, thereby improving the high quality of the CRT. It can be obtained as well as to protect the eyesight of the consumer will be described in detail by the accompanying drawings as follows.
플라이백트랜스의 1차권선은 전원과 접속하며 플라이백 트랜스 2차권선의 1측단은 다이오드(D1) 콘덴서(C1)저항(R1)(R2)(R3)을 통하여 비교기(a)의 1측 입력단자(-)와 연결하고 플라이백 트랜스2차권선의 타측단은저항(R)을 연결한 전원(B-)을 접속함과 동시에 제너다이오드(ZD) 콘덴서(C2)로 구성된 정전압회로(나) 및 저항(R5)(R6)을 통하여 비교기(가)의 2측 입력단자(+)와 연결하며 비교기(가)의 출력단은 저항(R4)을 통하여 트랜지스터(Q)의 베이스단자와 연결하고 트랜지스터(Q)의 콜랙터단자는 외부전원(B-)과 접속하여 수평발진회로(다)와 연결하며 트랜지스터(Q)의 에미터단자는 접지하여 된 것으로 상기와 같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.The primary winding of the flyback transformer is connected to the power supply, and the first end of the flyback transformer secondary winding is connected via a diode (D 1 ) capacitor (C 1 ) resistor (R 1 ) (R 2 ) (R 3 ). Connect the input terminal (-) of 1) and the other end of the flyback transformer secondary winding to the power supply (B-) connected with the resistor (R), and to the zener diode (ZD) capacitor (C 2 ). The configured constant voltage circuit (B) and resistor (R 5 ) (R 6 ) are connected to the two-sided input terminal (+) of comparator (A), and the output terminal of comparator (A) is transistor (Q) through resistor (R 4 ). ) And the collector terminal of transistor (Q) are connected to external oscillation circuit (B-) and connected to horizontal oscillation circuit (C), and the emitter terminal of transistor (Q) is grounded. Referring to the effect of the present invention configured as follows.
저항(R7)을 통한 전원(B+)은 정전압회로(가)에 인가되고 이 정전압회로(가)에서 일정하재 유지된 전압은 기준전압설정용 저항(R5)(R6)을 통하여 기준전압이 설정된 후 비교기(Z)의 2측 입력단(+)에 입력되게 된다.The power supply B + through the resistor R 7 is applied to the constant voltage circuit (A) and the voltage held constant in the constant voltage circuit (A) is referred to the reference voltage through the reference voltage setting resistor (R 5 ) (R 6 ). After this is set, it is input to the two-side input terminal (+) of the comparator Z.
또한 저항(R7)을 통한 전원(B+)이 플라이백트랜스의 2차권선 타측에 접속되어 있으므로 플라이백트랜스 출력단자는 플라이백트랜스 펄스와 전원(B+)과의 평균치를 출력하게 된다.In addition, and it outputs the average value of the resistor (R 7) power supply (B +) is a flyback because it is connected to the other secondary winding of the transformer flyback transformer output stage The flyback transformer and a pulse power (B +) through.
따라서 플라이백트랜스의 츨력단에서 출력된 출력고압은 다이오드(D1) 콘덴서(C1)를 통하여 반파정류되어 직류전압으로 가변되므로 고압은 전압강하 저항(R1)(R2)(R3)을 통하여 비교기(Z)의 1측입력단(-)에 입력되게 된다.Therefore, the output high voltage output from the output terminal of the flyback transformer is half-wave rectified through the diode (D 1 ) condenser (C 1 ) and is converted into a DC voltage, so that the high voltage is a voltage drop resistor (R 1 ) (R 2 ) (R 3 ) It is input to the one-side input terminal (-) of the comparator (Z) through.
이때 비교기(가)에서는 비교기(가)의 1차측 입력단자(-)에 입력되 고압과 비교기(가)의 2차측 입력단자(+)에 입력된 기준전압과를 비교하여 기준전압이 고압보다 낮을 경우는 비교기(가)애서 로우신호를 출력하게 되므로 이 로우신호는 저항(R4)읕 통하여 트랜지스터(Q)의 베이스단자에 인가되어 트랜지스터(Q)는 오프되고 외부전원(B+')은 수평발진회로(다)에 인가되므로 수평발진을 하게 되는 것이다.At this time, the comparator (A) compares the high voltage input to the primary input terminal (-) of the comparator (A) with the reference voltage input to the secondary input terminal (+) of the comparator (A) and In this case, since the comparator outputs a low signal, the low signal is applied to the base terminal of the transistor Q through the resistor R 4 so that the transistor Q is turned off and the external power source B + 'is horizontally oscillated. Since it is applied to the circuit (c), horizontal oscillation is performed.
또한 기준전압보다 높은 이상고압이 비교기(Z)에 입력되면 비교기(가)는 하이신호를 출력하고 이 하이신호는 트랜지스터(Q)에 입력되므로 트랜지스터(Q)는 온이되어 의부전원(B+)은 접지되고 수평발진회로(다)에 전원(B+)이 인가되지 않으므로 수평발진화로(다)는 동작할 수 없어 이상고압의 발생을 중단하게 되는 것이다.In addition, when an abnormal high voltage higher than the reference voltage is input to the comparator Z, the comparator outputs a high signal and the high signal is input to the transistor Q, so that the transistor Q is turned on so that the negative power supply B + Since the ground and the power supply B + is not applied to the horizontal oscillation circuit (C), the horizontal oscillation furnace (C) cannot operate and stops the occurrence of the abnormal high voltage.
이상에서 설명한 바와같이 본 고안은 전원(B+)을 플라이백트랜스 2차권선의 타측단에 접속함으로써 전체적인 레밸을 평준화시커 순간고압이 너무 높을 경우에는 비교기(가)에 기준이상의 전압이 가해지게 되므로 비교기(가) 파괴되는 것을 방지하게 되어 CRT의 고화질을 제공하여 주고 시청자의 시력보호 및 안전규격에 효과가 있는 잇점을 제공하여 주는것이다.As described above, the present invention connects the power supply (B +) to the other end of the flyback transformer secondary winding, so that when the instantaneous high voltage of the level is too high, the comparator is applied with a voltage higher than the reference level. (A) It prevents destruction and provides high quality of CRT and provides the advantage that it is effective to protect eyesight and safety standard of viewer.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870010286U KR910001467Y1 (en) | 1987-06-26 | 1987-06-26 | High voltage control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870010286U KR910001467Y1 (en) | 1987-06-26 | 1987-06-26 | High voltage control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890001773U KR890001773U (en) | 1989-03-20 |
| KR910001467Y1 true KR910001467Y1 (en) | 1991-03-04 |
Family
ID=19264527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870010286U KR910001467Y1 (en) | 1987-06-26 | 1987-06-26 | High voltage control circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR910001467Y1 (en) |
-
1987
- 1987-06-26 KR KR2019870010286U patent/KR910001467Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890001773U (en) | 1989-03-20 |
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