KR900008500Y1 - Flyback transformer - Google Patents
Flyback transformer Download PDFInfo
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- KR900008500Y1 KR900008500Y1 KR2019870012925U KR870012925U KR900008500Y1 KR 900008500 Y1 KR900008500 Y1 KR 900008500Y1 KR 2019870012925 U KR2019870012925 U KR 2019870012925U KR 870012925 U KR870012925 U KR 870012925U KR 900008500 Y1 KR900008500 Y1 KR 900008500Y1
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- horizontal
- circuit
- flyback transformer
- transistor
- resistor
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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
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- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 종래의 보호회로가 구성된 수평편향회로도.1 is a horizontal deflection circuit diagram in which a conventional protection circuit is constructed.
제 2 도는 본 고안의 보호회로가 구성된 수평편향회로도.2 is a horizontal deflection circuit diagram of a protection circuit of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 수평드라이브회로 2 : 수평출력회로1: horizontal drive circuit 2: horizontal output circuit
FBT : 플라이백트랜스 TR11: 트랜지스터FBT: Flyback Trans TR 11 : Transistor
R11-R15: 저항 C11-C13: 콘덴서R 11 -R 15 : Resistor C 11 -C 13 : Capacitor
ZD11: 정전압다이오드ZD 11 : Constant Voltage Diode
본 고안은 브라운관의 전자빔을 수평편향시키는 수평편향회로에 있어서, 플라이백 트랜스가 발열하여 손상되는 것을 방지하는 플라이백 트랜스 보호회로에 관한 것이다.The present invention relates to a flyback transformer protection circuit for preventing a flyback transformer from being damaged by heat generation in a horizontal deflection circuit for horizontally deflecting an electron beam of a CRT.
종래의 보호회로는 제 1 도에 도시한 바와같이 수평출력회로(2)의 트랜지스터(TR2)의 에미터를 접지저항(R5) 및 저항(R6)을 통해 콘덴서(C6)에 접속함과 아울러 그 접속점을 정전압다이오드(ZD1)를 통해 콘덴서(C7) 및 저항(R7), 수평발진회로에 접속하여 구성하였다.In the conventional protection circuit, as shown in FIG. 1, the emitter of the transistor TR 2 of the horizontal output circuit 2 is connected to the capacitor C 6 through the ground resistor R 5 and the resistor R 6 . In addition, the connection point was constructed by connecting a capacitor C 7 , a resistor R 7 , and a horizontal oscillation circuit through a constant voltage diode ZD 1 .
제 1 도의 도면설명중 미설명부호 1은 수평드라이브회로이고, T1은 드라이브트랜스, D1은 다이오드, HL은 수평편향코일, FBT는 플라이백트랜스, HS는 수평 발진신호이며, Vcc는 전원단자이다.In FIG. 1, reference numeral 1 denotes a horizontal drive circuit, T 1 denotes a drive transformer, D 1 denotes a diode, HL denotes a horizontal deflection coil, FBT denotes a flyback transformer, and HS denotes a horizontal oscillation signal. to be.
이와같이 구성된 종래의 보호회로는 플라이백트랜스(FBT)로 많은 전류가 흐르게 되면, 트랜지스터(TR2)의 에미터 전류가 증가하여 저항(R5)의 양단간의 전압이 상승하고, 그 저항(R5)의 양단간의 전압은 저항(R6)을 통해 콘덴서(C6)에 충전되면서 정전압다이오드(ZD1)의 캐소드에 인가되며, 여기서 플라이백트랜스(FBT)로 흐르는 전류가 정격전류이상이 될 경우에 정전압다이오드(ZD1)의 캐소드에 인가되며, 여기서 플라이백트랜스(FBT)로 통해 콘덴서(C6)에 충전되면서 정전압다이오드(ZD1)의 캐소드에 인가되는 전압이 그의 제너전압이상으로 되게 저항(R5, R6)의 값을 설정하면, 플라이백트랜스(FBT)로 정격전류 이상의 전류가 흐를 경우에 정전압다이오드(ZD1)가 온되므로 콘덴서(C6)에 충전된 고전위가 정전압다이오드(ZD1)를 통해 수평발진회로에 입력되어 수평발진회로의 구동이 정지되고, 그 수평발진회로의 구동이 정지됨에 따라 수평발진신호(HS)가 입력되지 못하여 수평편향회로의 구동이 정지되며, 플라이백트랜스(FBT)가 손상되는 것이 방지된다.Thus the conventional protection circuit composed of the flyback transformer (FBT) when a large current flows into a transistor (TR 2) the emitter current is increased to increase the both ends voltage of the resistor (R 5), and the resistance (R 5 The voltage between the both ends of the C) is applied to the cathode of the constant voltage diode (ZD 1 ) while being charged to the capacitor (C 6 ) through the resistor (R 6 ), where the current flowing into the flyback transformer (FBT) becomes higher than the rated current. Is applied to the cathode of the constant voltage diode (ZD 1 ), wherein the voltage applied to the cathode of the constant voltage diode (ZD 1 ) is charged above its zener voltage while being charged to the capacitor (C 6 ) through the flyback transformer (FBT). If the value of (R 5 , R 6 ) is set, the constant voltage diode (ZD 1 ) turns on when a current equal to or higher than the rated current flows through the flyback transformer (FBT), so that the high potential charged in the capacitor (C 6 ) is a constant voltage diode. (ZD 1 ) to the horizontal oscillation circuit When the driving of the horizontal oscillation circuit is stopped and the driving of the horizontal oscillation circuit is stopped, the operation of the horizontal deflection circuit is stopped due to the failure of the horizontal oscillation signal HS, and the flyback transformer FBT is damaged. Is prevented.
그러나, 이와같은 종래의 보호회로는 트랜지스터(TR2)의 에미터에 저항(R5, R6)을 접속하여 플라이백트랜스(FBT)로 과전류가 흐르는 것을 검출하므로 수평편향파형에 나쁜 영향을 미치게 되어 수평편향코일(HL)이 원활하게 편향할수 없는 결함이 있었다.However, such a conventional protection circuit connects the resistors R 5 and R 6 to the emitter of the transistor TR 2 and detects the overcurrent flowing to the flyback transformer FBT, thereby adversely affecting the horizontal deflection waveform. There was a defect that the horizontal deflection coil (HL) could not deflect smoothly.
본 고안은 이와같은 종래의 결함을 감안하여, 수평편향 파형에 아무런 영향을 주지 않으면서 플라이백트랜스를 보호하게 안출한 것으로, 이를 첨부된 제 2 도의 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is conceived to protect the flyback transformer without affecting the horizontal deflection waveform in view of such a conventional deficiency, which will be described in detail with reference to the accompanying drawings of FIG.
제 2 도에 도시한 바와같이 수평드라이브회로(1)의 출력 신호에 따라 수평출력회로(2)가 수평편향을 제어하는 수평편향 회로에 있어서, 수평출력회로(2)의 플라이백 트랜스(FBT)를 저항(R11) 및 콘덴서(C11)에 접속함과 아울러 그 접속점을 저항(R12)을 통해 콘덴서(C12) 및 트랜지스터(TR11)의 베이스에 접속하고, 트랜지스터(TR11)의 콜렉터에는 저항(R13, R14)을 직렬로 접속하여 그 저항(R13, R14)의 접속점을 정전압다이오드(ZD11)를 통해 콘덴서(C13) 및 저항(R15), 수평발진회로에 접속하여 구성한 것이다.In the horizontal deflection circuit in which the horizontal output circuit 2 controls the horizontal deflection in accordance with the output signal of the horizontal drive circuit 1, as shown in FIG. 2, the flyback transformer FBT of the horizontal output circuit 2 is shown. connected to the base of the resistance (R 11) and capacitor capacitor (C 12) a junction box and addition, the connection point to the (C 11) through a resistor (R 12) and a transistor (TR 11) and the transistor (TR 11) the collector has a resistance (R 13, R 14) to be connected in series with the resistor (R 13, R 14) condenser through a zener diode (ZD 11) to the connection point of the (C 13) and a resistor (R 15), a horizontal oscillator circuit It is configured by connecting to.
이와같이 구성된 본 고안은 전원단자(Vcc)에 전원이 인가되고, 수평발진신호(HS)가 입력되면, 그 입력된 수평발진신호(HS)는 수평드라이브회로(1)를 통해 수평출력회로(2)에 입력되므로 트랜지스터(TR2)가 온 및 오프를 반복하게 되고, 그 온 및 오프의 반복에 따라 수평편향 코일(HL)은 수평편향을 하고, 플라이백트랜스(FBT)는 고압을 발생하게 된다.According to the present invention configured as described above, when power is applied to the power supply terminal Vcc and the horizontal oscillation signal HS is input, the input horizontal oscillation signal HS is inputted through the horizontal drive circuit 1 to the horizontal output circuit 2. Since the transistor TR 2 is repeatedly turned on and off, the horizontal deflection coil HL is horizontally deflected and the flyback transformer FBT generates a high voltage according to the repetition of the on and off.
그리고, 플라이백트랜스(FBT)로 흐르는 전류에 따라 저항(R11)의 양단에는 일정전압이 인가되고, 그 인가된 전압은 저항(R12)을 통해 트랜지스터(TR11)의 베이스에 인가되며, 여기서, 플라이백트랜스(FBT)로 정격전류가 흐를 경우에 트랜지스터(TR11)에 그의 바이어스전압 이하가 인가되게 저항(R11, R12)의 값을 설정하면, 플라이백트랜스(FBT)로 정격전류가 흐를때 트랜지스터(TR11)가 오프되므로 트랜지스터(TR11)의 콜렉터에 저전위가 출력되고, 이에 따라 정전압다이오드(ZD11)가 온되지 못하여 수평발진회로는 정상 구동되고, 그 수평 발진회로의 구동에 따라 수평발진신호(HS)가 입력되어 수평편향회로는 정상 동작된다.In addition, a constant voltage is applied to both ends of the resistor R 11 according to the current flowing through the flyback transformer FBT, and the applied voltage is applied to the base of the transistor TR 11 through the resistor R 12 . Here, when the rated current flows through the flyback transformer FBT, when the values of the resistors R 11 and R 12 are set such that the bias voltage or less is applied to the transistor TR 11 , it is rated as the flyback transformer FBT. When the current flows, the transistor TR 11 is turned off, so a low potential is output to the collector of the transistor TR 11. Accordingly, the constant voltage diode ZD 11 is not turned on so that the horizontal oscillation circuit is normally driven. According to the driving of the horizontal oscillation signal (HS) is inputted, the horizontal deflection circuit is operated normally.
그리고, 상기에서 플라이백트랜스(FBT)로 정격전류 이상의 전류가 흐를 경우에 트랜지스터(TR11)에 그의 바이어스전압 이상이 인가되게 저항(R11, R12)의 값을 설정하면, 플라이백트랜스(FBT)로 정격전류 이상의 흐를때 트랜지스터(TR11)가 온되므로 전원단자(Vcc)의 전원이 트랜지스터(TR11)를 통하고, 저항(R13, R14)에 의해 분할된 후 정전압다이오드(ZD11)를 통해 수평발진회로에 인가되어 수평발진회로의 구동이 정지되고, 수평발진신호(HS)가 입력되지 못하여 수평편향회로의 구동이 정지되고, 플라이백트랜스(FBT)가 손상되는 것을 방지하게 된다.When the value of the resistors R 11 and R 12 is set such that the bias voltage or more is applied to the transistor TR 11 when a current equal to or higher than the rated current flows into the flyback transformer FBT. Since the transistor TR 11 is turned on when the FBT flows more than the rated current, the power supply terminal Vcc is powered by the transistor TR 11 and divided by the resistors R 13 and R 14 . 11 ) is applied to the horizontal oscillation circuit to stop the driving of the horizontal oscillation circuit, the horizontal oscillation signal (HS) is not inputted so that the driving of the horizontal deflection circuit is stopped, and to prevent damage to the flyback transformer (FBT) do.
이상에서 설명한 바와같이 본 고안은 플라이백트랜스로 흐르는 전류를 직접 이용하여 플라이백트랜스가 손상되는 것을 보호하므로 그 보호동작이 매우 빠르고, 또한 수평출력회로에 아무런 영향도 주지않아 수평출력회로가 원활하게 수평편향을 할수 있는 효과가 있다.As described above, the present invention protects the flyback transformer from damage by directly using the current flowing through the flyback transformer, so the protection operation is very fast and the horizontal output circuit is smoothly affected without any influence on the horizontal output circuit. It has the effect of horizontal deflection.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870012925U KR900008500Y1 (en) | 1987-07-31 | 1987-07-31 | Flyback transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870012925U KR900008500Y1 (en) | 1987-07-31 | 1987-07-31 | Flyback transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890003823U KR890003823U (en) | 1989-04-14 |
| KR900008500Y1 true KR900008500Y1 (en) | 1990-09-22 |
Family
ID=19266069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870012925U KR900008500Y1 (en) | 1987-07-31 | 1987-07-31 | Flyback transformer |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900008500Y1 (en) |
-
1987
- 1987-07-31 KR KR2019870012925U patent/KR900008500Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR890003823U (en) | 1989-04-14 |
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