KR870000319B1 - Power source circuit of television set - Google Patents

Power source circuit of television set Download PDF

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KR870000319B1
KR870000319B1 KR1019840007484A KR840007484A KR870000319B1 KR 870000319 B1 KR870000319 B1 KR 870000319B1 KR 1019840007484 A KR1019840007484 A KR 1019840007484A KR 840007484 A KR840007484 A KR 840007484A KR 870000319 B1 KR870000319 B1 KR 870000319B1
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flop
flip
charging
voltage
transistor
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KR1019840007484A
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Korean (ko)
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KR860004548A (en
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최의
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삼성전자 주식회사
정재은
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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

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  • Television Receiver Circuits (AREA)

Abstract

This invention is on a TV image receiver which lessons the power loss and the detriment of a charging battery. The procedure is as follows. When a TV broadcasting is ended, the charge of a charging battery begins through a charging circuit by turning off the transister which provides power source to TV image receiver via flip flop and at the same time turning on the transister to charge a charging battery. When the charge is completed, the power loss is lessened by stopping a relay operation followed by turning off an input power source. Also, the power source protects a charging battery from inner abnormality by using a flip flop and a switching transister.

Description

텔레비젼 수상기의 전원회로Power Supply Circuit for TV Receiver

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

제2도는 제1도에 있는 방송검출회로도.2 is a broadcast detection circuit diagram shown in FIG.

제3도는 제1도에서의 각부전압 및 전류파형도이다.FIG. 3 is a waveform diagram of respective parts voltage and current in FIG.

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

1 : 정류기 2 : 레귤레이터1: rectifier 2: regulator

3 : 방송검출회로 4 : 충전회로3: broadcast detection circuit 4: charging circuit

FF1, FF2 : 플립플롭 RY1: 릴레이FF1, FF2: flip-flop RY 1 : relay

S0~S3:각종스위치 T1, T2: 트랜스포머S 0 ~ S 3 : Various switches T 1 , T 2 : Transformer

VR: 가변저항 ZD1, ZD2: 제너다이오드V R : Variable resistor ZD 1 , ZD 2 : Zener diode

BAT : 충전용밧데리 A : 텔레비젼수상기의 전원단.BAT: Rechargeable Battery A: Power stage of TV receiver.

본 발명은 직류전원으로 동작되는 텔레비젼수상기에 있어서, 텔레비젼방송이 종료되면 자동적으로 전원이 차단되면서, 내장된 충전용 밧데리가 충전하기 시작하게됨과 아울러 충전이 완료되면 입력전압을 차단시키도록 된 텔레비젼 수상기의 전원회로에 관한 것이다.The present invention is a television receiver operated by a DC power source, the power supply is automatically cut off when the TV broadcast is terminated, the built-in rechargeable battery starts to charge and the TV receiver to cut off the input voltage when the charging is completed It relates to the power supply circuit of.

일반적으로 방송국으로부터 송신된 텔레비젼의 영상과 음성신호를 전파로 받아서 원화상과 음성을 나타내는 텔레비젼수상기에 있어서, 시청자가 텔레비젼을 시청하다가 수상기를 켜 놓은채 잠들거나 외출하는 경우에는 텔레비젼 방송이 종료됐음에도 불구하고 텔레비전수상기가 계속켜져 있음으로 해서 불필요한 전력소모가 초래되었고, 또한 충전용 밧데리가 내장되어 직류전원으로 사용되는 텔레비젼수상기를 동작시키기 위해서는 사용자가 수동으로 일일이 조작하여 텔레비젼수상기의 충전용밧데리를 충전시켜 사용했으며, 또 외부전원으로 텔리비전수상기를 동작시킬 때에는 충전용 밧데리가 외부전원에 계속 접속되어 있기 되므로써 과충전이 되거나 텔레비젼수상기 내부에서 이상이 발생할때 충전용 밧데리가 손상될 우려가 있었다.In general, a television receiver that receives an image and an audio signal of a television transmitted from a broadcasting station as a radio wave and displays an original image and sound, even though the television broadcasting is terminated when the viewer falls asleep or goes out with the receiver turned on while watching the television. In addition, since the TV receiver is turned on continuously, unnecessary power consumption is caused. Also, in order to operate the TV receiver used as a DC power source with a built-in rechargeable battery, the user manually operates the battery to charge the rechargeable battery of the TV receiver. In addition, when the television receiver is operated with an external power source, the rechargeable battery is continuously connected to the external power source, thereby causing the rechargeable battery to be damaged when the battery is overcharged or an abnormality occurs in the television receiver.

본 발명은 상기한 결점들을 개선하기 위해 발명된 것으로서, 텔레비젼방송이 종료되면 방송검출회로의 출력이 하이상태로 출력되고, 그에따라 플립플롭을 통하여 텔레비젼 수상기로 전원을 공급시키는 트랜지스터를 턴오프시킴과 더블어 충전용밧데리를 충전시키기 위한 트랜지스터를 턴온시키므로써 충전회로를 통해 충전용밧데리가 충전을 시작하게 되며, 밧데리의 충전이 완료되면 릴레이의 동작을 중지시켜 입력전원을오 프시키므로써 불필요한 전력소비를 줄이게 되고 또한 충전용밧데리와 방송검출회로 사이에 설치된 플립플롭과 스위칭 트랜지스터를 이용하여 텔레비젼 수상기의 내부이상으로부터 충전용밧데리를 보호할 수 있도록 된 텔레비젼수상기의 전원회로를 제공하고자 함에 그 목적이 있다.The present invention has been invented to solve the above-mentioned shortcomings, and when the television broadcast is terminated, the output of the broadcast detection circuit is output in a high state, thereby turning off a transistor supplying power to the television receiver through a flip-flop. By turning on the transistor to charge the double rechargeable battery, the rechargeable battery starts charging through the charging circuit.When the battery is fully charged, the relay stops the operation to turn off the input power. It is an object of the present invention to provide a power supply circuit for a television receiver which is reduced and can protect the charging battery from an abnormality inside the television receiver by using a flip-flop and a switching transistor provided between the charging battery and the broadcast detection circuit.

이하 본 발명의 구성 및 작용, 효과를 예시도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration, operation, and effects of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 통상적인 정류기(1)에 통상적인 레귤레이터(2)와 릴레이(RY1)를 병렬연결하고, 통상적인 레귤레이터(2)에는 플립플릅(FF1)(FF2)의 전원단(VDD)과 가변저 항(VR) 및 리셋트스위치(S2)를 병렬연결하며, 플립플롭(FF1)의 클록단(CK)에는 충전전압에 의해 턴온/턴오프되는 직렬의 트랜지스터(TR1)(TR2)를 플립플롭(FF1)의 출력단(Q)에는 직병렬의 다이오드(D1D3)와 저항(R2)을 매개하여 릴레이(RY1)의 코일을 연결하고, 플립플롭(FF2)의 클록단(CK)에는 리셋트스위치(S2)의 텔레비젼방송의 유무에 따라 출력신호가 변경되는 방송검출회로(3)를 플립플롭(FF2)의 출력단(Q)(

Figure kpo00001
)에는 스위칭트랜지스터(TR3)(TR4)를 매개하여 충전용밧데리(BAT), 셋트스위치(S3), 제너다이오드(ZD1), 충전회로(4) 및 텔레비젼수상기의 B+전원단(A)을 병렬연결시킨 구조로 되어있다.In the present invention, a conventional regulator 2 and a relay RY 1 are connected in parallel to a conventional rectifier 1, and a power terminal V DD of a flip-flop FF 1 (FF 2 ) is connected to the conventional regulator 2. ) and a variable resistor (VR) and the reset switch (and paralleling the S 2), a flip-flop (clock stage (CK), the turn-on / turn-transistor (TR 1) of the series is turned off by a charged voltage of the FF 1) (TR 2 ) is connected to the output terminal (Q 1 ) of the flip-flop (FF 1 ) by connecting a coil of the relay (RY 1 ) through a diode (D 1 D 3 ) and a resistor (R 2 ) in parallel and flip-flop ( In the clock stage CK of FF 2 , a broadcast detection circuit 3 whose output signal is changed in accordance with the presence or absence of television broadcasting of the reset switch S 2 is provided with an output stage Q of the flip-flop FF 2 (
Figure kpo00001
) Is a charging battery (BAT), a set switch (S 3 ), a zener diode (ZD 1 ), a charging circuit (4), and a B + power terminal (A) of a television receiver via a switching transistor (TR 3 ) (TR 4 ). ) Is connected in parallel.

미설명부호 T1는 트랜스포머, S0는 전원스위치, S는 동기신호, T2는 플라이백트랜스포머, HV는 고압전원, Vc는 방송검출회로(3)의 출력단, VZD는 제너다이오드(ZD1)의 제너블릭다운 전위를 나타낸다.Unmarked T 1 is a transformer, S 0 is a power switch, S is a synchronization signal, T 2 is a flyback transformer, HV is a high voltage power supply, Vc is an output terminal of the broadcast detection circuit 3, V ZD is a zener diode (ZD 1 Represents a general down potential.

제1도는 상기한 구조로 되어있는 본 발명의 회로도를 나타내는 것으로 시청자가 텔레비젼수상기를 시청하기 위해 전원스위치(S0)를 온하면 교류전압이 트랜스포머(T1)를 통해 일정전압으로된 다음 정류기(1)에서 정류되고, 이 정류된 전압은 레귤레이터(2)를 통해 안정된 전압으로 변경되어 플립플롭(FF1)(FF2)의 전원단(VDD)으로 공급되며, 이때 저항(R1)을 통해 릴레이(RY1)코일과 다이오드(D2) 및 저항(R2)을 통해 릴레이(RY)코일과 다이오드(D2) 및 저항(R2)을 거쳐서 전류를 흘려주어 릴레이(RY1)가 구동되므로 정류된 전압이 충전회로(4)로 공급된다.1 shows a circuit diagram of the present invention having the above-described structure. When the viewer turns on the power switch S 0 to watch a television receiver, the AC voltage becomes a constant voltage through the transformer T 1 and then the rectifier ( Rectified in 1), the rectified voltage is changed to a stable voltage through the regulator 2 and supplied to the power terminal V DD of the flip-flop FF 1 (FF 2 ), whereby the resistor R 1 is Through the relay (RY 1 ) coil and diode (D 2 ) and the resistor (R 2 ), the current flows through the relay (RY) coil and diode (D 2 ) and the resistor (R 2 ) so that the relay (RY 1 ) Since it is driven, the rectified voltage is supplied to the charging circuit 4.

한편, 텔레비젼신호중 동기신호(S)가 제2도에 도시된 바와같이 방송검출회로(3)에 입력되므로 그 출력신호는 정상적인 동기신호가 입력될때 로우상태로 플립플롭(FF2)의 클록단(CK)에 인가되어 출력단(Q)(

Figure kpo00002
)의 신호가 초기상태인 로우상태의 하이상태로서 트랜지스터(TR3)(TR4)의 베이스에 각각 인가되고, 이에 따라 트랜지스터(TR3)는 턴오프, 트랜지스터(TR4)는 턴온되어 충전회로(4)를 통한 정류전압이 텔레비젼수상기의 B+전원단(A)을 통해 각회로부에 공급된다.On the other hand, since the synchronization signal S of the television signals is input to the broadcast detection circuit 3 as shown in FIG. 2, the output signal thereof is in a low state when the normal synchronization signal is input (the clock stage of the flip-flop FF 2 ). Is applied to the output terminal Q (
Figure kpo00002
) Signal is applied to each of a high level of the low level initially at the base of the transistor (TR 3) (TR 4) , thus the transistor (TR 3) is turned off and the transistor (TR 4) is turned the charging circuit The rectified voltage through (4) is supplied to each circuit part through B + power supply terminal A of a television receiver.

그러다가 방송이 종료되면 제2도에 도시된 바와같이 방송검출회로(3)의 수평출력트랜지스터(TR5)베이스에는 동기신호 발진회로로부터 입력되는 동기신호(S)의 발진주파수가 낮아져서 공급되어 출력트랜지스터(TR5)의 출력펄스 주파수가 낮아지게 되고, 이에따라 플라이백 트랜스포머(T2)의 2차코일에 유기되는 고압출력전압(HV)이 상승하게되는데, 이때 2차코일에 고압이 상승하면 플라이백 트랜스포머(T2)의 궤환전압이 올라간다. 이 상승되는 전압은 다이오드(D7)와 콘덴서(C3)에서 정류되어 저항(R6)(R7)을 통해 트랜지스터(TR6)에 공급된다.When the broadcast ends, the oscillation frequency of the synchronization signal S input from the synchronization signal oscillation circuit is lowered and supplied to the horizontal output transistor TR 5 of the broadcast detection circuit 3 as shown in FIG. The output pulse frequency of (TR 5 ) is lowered, thereby increasing the high voltage output voltage (HV) induced in the secondary coil of the flyback transformer (T 2 ). The feedback voltage of transformer T 2 rises. This rising voltage is rectified in the diode D 7 and the capacitor C 3 and supplied to the transistor TR 6 through the resistor R 6 (R 7 ).

이에따라 플라이백 트랜스포머(T2)의 궤환전압이 트랜지스터(TR6)베이스에 연결된 제너다이오드(ZD2)에 의해 정해진 일정전압이상으로 올라가게되면 제너다이오드(ZD2)가 턴온되면서 트랜지스터(TR6)가 턴온되어 콘덴서(C4)에는 "+"전위의 전압이 나타나게되고, 통상적으로 콘덴서(C4)의 전위는 급격히 상승하므로 제3도의(3-2)와 같은 펄스로 표시해도 무방하다.Accordingly, when the feedback voltage of the flyback transformer T 2 rises above a certain voltage determined by the zener diode ZD 2 connected to the base of the transistor TR 6 , the zener diode ZD 2 is turned on and the transistor TR 6 is turned on. is turned on the capacitor (C 4) is displayed and the voltage of "+" potential, typically a potential of the capacitor (C 4) is rapidly increased, so it is also mubang indicate a pulse, such as a third-degree (3-2).

이와같은 전압이 방송검출회로(3)의 출력단(VC)을 통해 "+''전위의 하이상태로서 플립플롭(FF2)의 클록단(CK)이 공급되며, 이때 클록펄스의 라이징에이지(RISING EDGE)에서 동작하도록 된 플립플롭(FF2)의 출력단(Q)(

Figure kpo00003
)에는 하이와로우상태로 각각 출력되어 트랜지스터(TR3)(TR4)의 베이스에 공급된다. 그러면, 플립플롭(FF2)의 출력 변화(제3도의 (3-3)은 출력(Q)신호, (3-4)는 출력(
Figure kpo00004
)신호에 따라 트랜지스터(TR4)는 턴오프되고 트랜지스터(TR3)는 턴온되어 정류기(1)에 의해 정류된 전압이 충전회로(4)를 통해 충전용밧데리(BAT)에 공급되므로써 충전용밧데리(BAT)가 충전을 시작하게 된다. 여기서 제3도의(3-2)에 나타난 텔레비젼방송이 수신되지 않는 기간으로부터의 시간(T)을 2-3분으로 하여 방송검출회로(3)가 오동작됨을 방지하도록 할 필요가 있는데, 이러한 값은 제2도의 방송검출회로(3)에 있는 저항(R6)(R7)과 콘덴서(C3)(C4) 및 제너다이오드(ZD2)의 갔으로 결정하게 된다.This voltage is supplied to the clock terminal CK of the flip-flop FF 2 as the high state of the `` + '' potential through the output terminal VC of the broadcast detection circuit 3, and at this time, the rising edge of the clock pulse. Output stage Q of the flip-flop FF 2 (
Figure kpo00003
) Are respectively output in a high and low state and are supplied to the base of transistors TR 3 and TR 4 . Then, the output change of the flip-flop FF 2 ((3-3) in FIG. 3 is an output Q signal, and (3-4) is an output (
Figure kpo00004
The transistor TR 4 is turned off according to the signal and the transistor TR 3 is turned on so that the voltage rectified by the rectifier 1 is supplied to the charging battery BAT through the charging circuit 4, thereby charging the battery. (BAT) will start charging. Here, it is necessary to set the time T from the period in which the television broadcast shown in (3-2) of FIG. 3 is not received to 2-3 minutes to prevent the broadcasting detection circuit 3 from malfunctioning. The resistance R 6 (R 7 ), the capacitor C 3 (C 4 ), and the zener diode ZD 2 in the broadcast detection circuit 3 of FIG. 2 are determined.

전술한 트랜지스터(TR4)가 턴오프되어 텔레비젼수상기에 공급되던 B+전원을 차단하고, 그러면(3-2)에서와 같이 약간의 시간(t2∼t1)이 지난후 방송검출회로(3)의 출력단(VC)신호는 로우상태로 떨어진다. 한편 시간(t1)아서 트랜지스터(TR3)가 턴온되어 충전용밧데리(BAT)의 충전전위가(3-5)에서 처럼 상승되므로 어느정도 충전이 완료되어가면 제너다이오드(ZD1)의 제너블릭다운전위(VZD)를 넘어서게되고, 이로부터 콘덴서(C1)에 의한 충전시정수 이후에는 트랜지스터(TR1)의 베이스-에미터 포화전압에 이르게되어 트랜지스터(TR2)의 콜렉터 전위가 제3도의(3-6)같이 하이상태로 상승되며, 이값이 플립플롭(FF1)의 클록단(CK)에 인가됨에 따라 출력단(Q)에 하이상태의 신호가 출력된다. 따라서, 플립플롭(FF1)의 출력단(Q)이 제3도의(3-7)과 같이 하이상태로 되면 다이오드(D2)가 컷오프되어 전류가 흐르지못하게 되므로써 릴레이(RY1)의 접점(S1)이(3-8)와같이 오프되게 되고, 이에따라 교류전원이 차단되며, 이때 릴레이(RY1)의 접점(S1)이 오프됨에 따라 충전용밧데리(BAT)의 충전이 중지되면서 충전전위는 트랜지스터(TR1)의 베이스전류에 의해 전위가 낮아진다. 이후 제너다이오드(ZD1)의 제너블릭다운 전위(VZD)이 이르면 제너다이오드(ZD1)가 컷오프되면서 트랜지스터(TR1)가 턴오프되어 트랜지스터(TR1)의 콜렉터전위는 다시 로우상태로 떨어지게 된다.The above-described transistor TR 4 is turned off to cut off the B + power supplied to the television receiver, and then, after some time t 2 to t 1 as in (3-2), the broadcast detection circuit 3 Output signal VC drops to the low state. On the other hand, since the transistor TR 3 is turned on at the time t 1 and the charging potential of the battery BAT is increased as in (3-5), when the charging is completed to some extent, the general down of the zener diode (ZD 1 ) is performed. and beyond the voltage (V ZD), from which after the capacitor can charge time constant of the (C 1), the base of the transistor (TR 1) - emitter is led to the saturation voltage is a collector potential of the transistor (TR 2) third-degree As high as (3-6), the high signal is output to the output terminal Q as this value is applied to the clock terminal CK of the flip-flop FF 1 . Therefore, when the output terminal Q of the flip-flop FF 1 becomes high as shown in (3-7) of FIG. 3, the diode D 2 is cut off so that no current flows, so that the contact point S of the relay RY 1 is blocked. 1) is to be turned off as shown in (3-8), yiettara exchange and power is cut off, wherein the relay (RY 1) contact point (S 1) charging potential as charging stop of charging the battery (BAT) for the off as the The potential is lowered by the base current of the transistor TR 1 . After the zener diode ZD 1 reaches the zener down potential V ZD , the zener diode ZD 1 is cut off and the transistor TR 1 is turned off so that the collector potential of the transistor TR 1 falls back to a low state. do.

그후 사용자가 다시 텔레비젼수상기를 동작시키고자 할때는 리셋트스위치(S2)를 누르면 되는데, 만일 사용자가 제3도의(3-2)에 나타난 t3의 시점에서 리셋트스위치(S2)를 눌렀다면 플립플롭(FF1)(FF2)의 클록단(CK)에 공급되는 전압이 동시에 하이상태로 상승하여 플립플롭(FF1)(FF2)의 출력단(Q)은 로우상태, 출력단(

Figure kpo00005
)는 하이상태로 되고, 이에따라 트랜지스터(TR3)가 턴오프되어 충전용 밧데리(BAT)의 전압을 차단하면서 트랜지스터(TR4)가 턴온되어 텔레비젼수상기의 B+전압단(A)으로 정류된 전압이 충전회로(4)를 통해 공급되도록 하게되므로 텔레비젼수상기가 동작하게 된다. 그리고, 제3도의(3-2)에 나타난 t3-t4사이의 시간은 사용자가 리셋트스위치를 눌렀다 떼는데 소요되는 시간을 나타낸다. 만일 사용자가 충전용밧데리(BAT)를 사용하여 TV를 시청하고자 할때는 셋트스위치(S3)를 온(ON)시키면 된다.Then, when the user wants to operate the television receiver again, the user presses the reset switch S 2. If the user presses the reset switch S 2 at the time t 3 shown in Fig. 3-2 of FIG. a flip-flop (FF 1) is low state, the output terminal (Q) of the flip-flop (FF 1) (FF 2) and a voltage is simultaneously raised to a high state that is supplied to the clock stage (CK) of (FF 2), an output terminal (
Figure kpo00005
) Becomes a high state, and accordingly the transistor TR 3 is turned off to cut off the voltage of the battery BAT for charging, while the transistor TR 4 is turned on and rectified to the B + voltage terminal A of the television receiver. The television receiver is operated because it is supplied through the charging circuit 4. The time between t 3 and t 4 shown in FIG. 3-2 shows the time taken by the user to press and release the reset switch. If the user wishes to watch TV using the rechargeable battery BAT, the set switch S 3 should be turned ON.

상기한 바와같이 본 발명은 텔레비젼수상기가 항상 온 상태에 있음으로서 생기는 소비전력을 절감하고, 텔레비젼수상기와 B+전압과 충전용밧데리를 분리해서 텔레비 젼수상기내 의이상상태발생시 밧데리 손상을 방지하며, 또 텔레비젼수상기가 꺼져있는 동안에 충전용 밧데리를 충전시킴으로써 충전에 소요되는 불필요한 시간을 거의 없앨 수 있다. 또한 충전용 밧데리가 충전을 완료하면 스위칭트랜지스터와 제너다이오드에 의해 밧데리의 부하선로가 차단됨으로써 충전용 밧데리의 전위를 일정하게 유지할 수 있다.As described above, the present invention reduces the power consumption caused by the television receiver being always in the on state, and separates the television receiver from the B + voltage and the rechargeable battery to prevent battery damage when an abnormal condition occurs in the television receiver. In addition, by charging the rechargeable battery while the television receiver is turned off, unnecessary time required for charging can be almost eliminated. In addition, when the rechargeable battery is fully charged, the load line of the battery is interrupted by the switching transistor and the zener diode, so that the potential of the rechargeable battery can be kept constant.

Claims (1)

통상적인 정류기(1)에 통상적인 레귤레이터(2)와 릴레이(RY1)를 병렬연결하고, 통상적인 레귤레이터(2)에는 플립플롭(FF1)(FF2)의 전원단(VDD)과 가변저항(VR) 및 리셋트스위치(S2)를 병렬연결하며, 플립플롭(FF1)의 클록단(CK)에는 충전전압에 의해 턴온/턴오프되는 직렬의 트랜지스터(TR1)(TR2)를 플립플롭(FF1)의 출력단(Q)에는 직병렬의 다이오드(D1∼D3)와 저항(R2)을 매거하여 릴레이(RY1)의 코일을 연결하고, 플립 플롭(FF2)의 클록단(CK)에는 트랜지스터(TR5)(TR6), 제너다이오드(ZD2), 플라이백 트랜스프머(T2), 저항(R6)(R7), 콘덴서(C2∼C4) 및 다이오드(D5~D7)로 구성되어 텔레비젼방송의 유무에 따라 출력신호가 변경되는 방송검출회로(3)와 리셋트스위치(S2)를, 플립플롭(FF2)의 출력단(Q)(
Figure kpo00006
)에는 스위칭트랜지스터(TR3)(TR4)를 매개하여 충전용밧데리 (BAT), 셋트스위치(S3), 제너다이오드(ZD1), 충전회로(4) 및 텔레비젼수상기의 B+전원단(A)을 병렬연결 하여서 텔레비젼방송이 종료되면 자동으로 전원이 꺼지면서 밧데리의 충전동작이 이루어지고, 충전이 완료되면 전원이 차단되도록 된 텔레비젼 수상기의 전원회로.A conventional regulator 2 and a relay RY 1 are connected in parallel to a conventional rectifier 1, and a power supply terminal V DD of a flip-flop FF 1 (FF 2 ) and a variable voltage are connected to the conventional regulator 2. The resistor VR and the reset switch S 2 are connected in parallel, and a series transistor TR 1 (TR 2 ) turned on / off by a charging voltage at the clock terminal CK of the flip-flop FF 1 . Is connected to the output terminal Q of the flip-flop FF 1 by connecting diodes D 1 to D 3 and resistors R 2 in parallel to the coil of the relay RY 1 , and flip-flop FF 2 . The clock stage CK has transistors TR 5 (TR 6 ), zener diodes (ZD 2 ), flyback transformer (T 2 ), resistors (R 6 ) (R 7 ), and capacitors (C 2 -C 4). ) And a diode (D 5 ~ D 7 ) and a broadcast detection circuit (3) and reset switch (S 2 ) that the output signal is changed depending on the presence or absence of television broadcasting, the output terminal (Q 2 ) of the flip-flop (FF 2 ) ) (
Figure kpo00006
) Is a battery (BAT), set switch (S3), zener diode (ZD 1 ), charging circuit (4) and the B + power supply terminal (A) of the TV receiver via the switching transistor (TR 3 ) (TR 4 ). ) Power supply circuit of TV receiver that power is turned off automatically when TV broadcasting is terminated by parallel connection, and power is cut off when charging is completed.
KR1019840007484A 1984-11-29 1984-11-29 Power source circuit of television set KR870000319B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019840007484A KR870000319B1 (en) 1984-11-29 1984-11-29 Power source circuit of television set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019840007484A KR870000319B1 (en) 1984-11-29 1984-11-29 Power source circuit of television set

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KR860004548A KR860004548A (en) 1986-06-23
KR870000319B1 true KR870000319B1 (en) 1987-02-26

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ID=19236396

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KR1019840007484A KR870000319B1 (en) 1984-11-29 1984-11-29 Power source circuit of television set

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