KR970003430B1 - Device for protecting overheat of television receiver - Google Patents

Device for protecting overheat of television receiver Download PDF

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Publication number
KR970003430B1
KR970003430B1 KR1019930023037A KR930023037A KR970003430B1 KR 970003430 B1 KR970003430 B1 KR 970003430B1 KR 1019930023037 A KR1019930023037 A KR 1019930023037A KR 930023037 A KR930023037 A KR 930023037A KR 970003430 B1 KR970003430 B1 KR 970003430B1
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South Korea
Prior art keywords
temperature
vertical deflection
thr1
output
thr2
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KR1019930023037A
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Korean (ko)
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KR950016207A (en
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김수헌
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대우전자 주식회사
배순훈
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Priority to KR1019930023037A priority Critical patent/KR970003430B1/en
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Publication of KR970003430B1 publication Critical patent/KR970003430B1/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

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

Abstract

The apparatus for preventing a television receiving set from an overheat comprises two thermistors(THR1, THR2) connected to an outputting terminal of a vertical deflection driving part(1) in parallel in turn, two thermistors(THR1, THR2) having a mutually different resistance characteristic against temperature; a switch(Q1) connected to a rear end part of the thermistor(THR1) having a relatively larger resistance value, and turned on if current over a constant level flows, to thereby ground an output of the vertical deflection driving part(1); a temperature rising alarm circuit (Z1) connected to a rear end part of the thermistor(THR2) having a relatively small resistance value provided in the same temperature and, for emitting light and alarming a temperature rising if the temperature in the outputting terminal of the vertical deflection driving part(1) rises more than a constant temperature; a level detecting circuit(2) for detecting that the driving output from the vertical deflection driving part(1) becomes a level under a constant level; and a micom(3) for controlling an on/off operation of a power circuit(4) according to a detection signal of the level detecting circuit(2).

Description

텔레비젼 수상기의 과열보호장치Overheating protection device of TV receiver

제1도는 본 발명의 1실시예에 따른 텔레비젼 수상기의 과열보호장치의 회로구성을 도시한 도면.1 is a diagram showing a circuit configuration of an overheat protection device for a television receiver according to an embodiment of the present invention.

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

1 : 수직편향 구동부 2 : 레벨검출 회로1: vertical deflection driving unit 2: level detection circuit

3 : 마이콤 4 : 전원회로부3: micom 4: power circuit

THR1, THR2 : 더미스터 Q1 : 트랜지스터THR1, THR2: Dummyster Q1: Transistor

D1 : 발광다이오드 Z1 : 온도상승 경고회로D1: Light emitting diode Z1: Temperature rise warning circuit

본 발명은 텔레비젼 수상기의 과열보호장치에 관한 것으로, 특히 수직편향 구동부의 출력단의 온도를 감지하여 온도의 과잉 상승시에 수직편향 구동부의 구동을 차단시킴으로써 텔레비젼 수상기를 오프 시키도록 된 텔레비젼 수상기의 과열보호장치에 관한 것이다.The present invention relates to an overheat protection device for a television receiver. In particular, the overheat protection device for a television receiver is configured to turn off the television receiver by sensing the temperature of the output end of the vertical deflection drive unit and shutting off the driving of the vertical deflection drive unit when the temperature rises excessively. It is about.

일반적으로 텔레비젼 수상기에 설치되는 수직편향 구동부에서는 열이 많이 발생하고 있는 바, 종래의 텔레비젼 수상기에서는 수직편향 구동부에서의 과열로 인한 화재의 위험성 및 주변회로 부품의 손상이 발생할 우려가 있었다.In general, since a large amount of heat is generated in the vertical deflection drive unit installed in the television receiver, there is a risk of fire and damage to peripheral circuit components due to overheating in the vertical deflection drive unit in the conventional television receiver.

본 발명을 상기 문제점을 해결하기 위해 발명된 것으로, 수직편향 구동부의 출력단에서의 온도를 감지하고 그 온도가 소정 온도 이상으로 상승하게 되면 자동적으로 수직편향 구동부의 출력전원을 접지시켜 텔레비젼 수상기를 오프 시킴으로써 텔레비젼 수상기의 과열을 방지할 수 있도록 된 텔레비젼 수상기의 과열보호장치를 제공함에 그 목적이 있다.The present invention has been invented to solve the above problems, by sensing the temperature at the output end of the vertical deflection drive unit and when the temperature rises above a predetermined temperature, the output power of the vertical deflection drive unit is automatically grounded to turn off the television receiver. It is an object of the present invention to provide an overheat protection device for a television receiver that can prevent overheating of the television receiver.

상기 목적을 달성하기 위한 본 발명은, 수직편향 구동부의 출력단자에 차례로 병렬, 접속되어 있으면서 온도에 대한 저항특성이 서로 다른 2개의 더미스터와, 이 2개의 더미스터 중 동일한 온도에서의 저항값이 상대적으로 더 큰 더미스터의 후단에 접속되면서, 이 더미스터로부터 하이레벨의 신호가 입력되면 턴온됨으로써 상기 수직편향 구동부의 출력을 접지 시키도록 된 트랜지스터, 동일한 온도에서의 저항값이 상대적으로 작은 더미스터의 후단에 접속되면서 상기 수직편향 구동부의 출력단 온도가 소정온도 이상으로 상승하면 발광하여 온도상승을 경고하도록 된 온도상승 경고회로, 상기 수직편향 구동부로부터의 구동출력이 일정레벨 이하로 되는 것을 검출하는 레벨검출 회로 및, 이 레벨검출 회로로부터의 검출결과에 따라 전원회로부의 동작을 온, 오프되도록 제어하는 마이콤을 구비하여 구성되어 있다.According to the present invention for achieving the above object, two dummysters having different resistance characteristics with respect to temperature while being connected in parallel to the output terminals of the vertical deflection drive unit and resistance values at the same temperature among the two dummysters A transistor that is connected to a rear end of a relatively larger dummyster and is turned on when a high-level signal is input from the dummyster to ground the output of the vertical deflection driver, and a dummyster having a relatively small resistance at the same temperature. A temperature rise warning circuit which emits light when the output stage temperature of the vertical deflection drive unit rises above a predetermined temperature while being connected to the rear end of the signal, and detects that the drive output from the vertical deflection drive unit is below a predetermined level. In accordance with the detection circuit and the detection result from this level detection circuit, A is configured by including a microcomputer for controlling so that the on and off.

상기와 같이 구성된 본 발명에 따르면, 수직편향 구동부의 출력단 온도가 소정 온도이상으로 되면 온도상승 경고회로의 발광 다이오드가 발광하여 1차적으로 사용자에게 곧 과열상태에 이르게 됨을 알려주고, 그후 수직편향 구동부의 출력단이 더 높은 온도로 과열되면 자동적으로 수직편향 구동부로부터 출력되는 구동출력을 접지시켜 텔레비젼 수상기를 오프시킴으로써 텔레비젼 수상기의 과열을 방지하게 된다.According to the present invention configured as described above, when the output stage temperature of the vertical deflection drive unit is higher than a predetermined temperature, the light emitting diode of the temperature increase warning circuit emits light and primarily informs the user that an overheating state is soon reached. When overheated to this higher temperature, the drive output output from the vertical deflection drive unit is automatically grounded to turn off the television receiver, thereby preventing overheating of the television receiver.

이하, 예시도면을 참조하여 본 발명의 실시예에 대해 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명의 실시예에 따른 텔레비젼 수상기의 과열보호장치의 회로구성을 도시한 도면으로서, 도면 참조부호 1은 TV용 CRT 화면의 수직편향 구동부, 2는 이 수직편향 구동부(1)의 구동출력 레벨이 일정레벨 이하로 되는 것을 검출하는 레벨 검출회로, 4는 장치전체에 동작전원을 공급하는 전원회로부, 3은 상기 레벨검출 회로(2)로부터의 검출신호에 따라 상기 전원 회로부를 온, 오프 제어하는 마이콤, THR1 및 THR2는 더미스터, Z1은 상기 수직편향 구동부(1)의 출력단 온도가 소정 온도이상으로 되면 발광하도록 된 온도상승 경고회로, Q1은 동일한 온도에서의 저항값이 상대적으로 큰 더미스터(THR1)의 후단에 접속되어 있으면서 이 더미스터(THR1)로부터 하이레벨의 신호가 입력되면 턴온됨으로써 상기 수직편향 구동부(1)의 출력을 접지시키는 트랜지스터이다.1 is a diagram showing a circuit configuration of an overheat protection device for a television receiver according to an embodiment of the present invention, wherein reference numeral 1 denotes a vertical deflection driver of a CRT screen for a TV, and 2 is a drive of the vertical deflection driver 1. A level detecting circuit for detecting that the output level falls below a predetermined level, 4 is a power supply circuit section for supplying operating power to the entire apparatus, and 3 is a power supply circuit section on and off in accordance with a detection signal from the level detection circuit 2; The controlling microcomputer, THR1 and THR2 are dummysters, Z1 is a temperature rise warning circuit which emits light when the output stage temperature of the vertical deflection drive unit 1 is above a predetermined temperature, and Q1 is a relatively large resistance value at the same temperature. A transistor connected to the rear end of the MR THR1 and turned on when a high level signal is input from the dummy RTH1 so as to ground the output of the vertical deflection driver 1. to be.

여기서, 수직편향 구동부(1)의 출력단에 접속되는 2개의 더미스터(THR1, THR2)중 전단에 접속된 더미스터(THR1)가 후단의 더미스터(THR2)에 비해 동일한 온도에서 상대적으로 더 큰 저항값을 갖도록 되어 있다.Here, the dummyster THR1 connected to the front end of the two dummysters THR1 and THR2 connected to the output terminal of the vertical deflection driving unit 1 has a larger resistance at the same temperature than the dummyster THR2 at the rear end. It is supposed to have a value.

따라서, 상기 수직편향 구동부(1)의 출력단 온도가 상승하기 시작하면 우선적으로 제너다이오드(D2)가 도통되어 온도상승 경고회로(Z1)로 전류가 흐르게 됨으로써 발광다이오드(D1)가 발광하게 된다. 따라서 온도의 상승, 즉 과열 상태에 이르게 됨을 1차적으로 시청자에게 알려주게 된다.Therefore, when the output stage temperature of the vertical deflection driving unit 1 starts to rise, the zener diode D2 conducts first and current flows to the temperature increase warning circuit Z1, thereby causing the light emitting diode D1 to emit light. Therefore, the viewer is primarily informed that the temperature rises, that is, overheating.

그후, 상기 수직편향 구동부(1)의 출력단 온도가 더 상승하여 마침내 과열상태에 이르게 되면 제너다이오드(D3)가 도통되어 트랜지스터(Q1)의 베이스에 하이레벨의 신호가 인가되게 됨으로써 트랜지스터(Q1)가 턴온되어 수직편향 구동부(1)의 출력이 접지되게 한다.After that, when the output stage temperature of the vertical deflection driver 1 further rises and finally reaches an overheat state, the zener diode D3 is turned on so that a high level signal is applied to the base of the transistor Q1 so that the transistor Q1 is turned on. It is turned on so that the output of the vertical deflection drive 1 is grounded.

그리고, 상기한 동작에 의해 노드(a)의 전위가 일정전위 이하로 강하되게 되면, 레벨검출 회로(2)가 이를 검출하여 예컨대 로우레벨의 검출신호를 마이콤(3)으로 출력한다.When the potential of the node a drops below a certain potential by the above operation, the level detection circuit 2 detects this and outputs, for example, a low level detection signal to the microcomputer 3.

다음, 마이콤(3)에서는 상기 검출회로(2)로부터 로우레벨 검출신호가 입력되면 상기 수직편향 구동부(1)와 그 밖의 다른 장치에 동작전원을 공급하는 전원회로부(4)의 동작을 오프시켜 텔레비젼 수상기를 오프시킴으로써 텔레비젼 수상기의 과열을 방지하게 된다.Next, when the low level detection signal is input from the detection circuit 2, the microcomputer 3 turns off the operation of the power supply circuit section 4 for supplying the operating power to the vertical deflection driving section 1 and other devices. Turning off the receiver will prevent overheating of the television receiver.

이상 설명한 바와 같이 본 발명에 따르면, 수직편향 구동부의 출력단에서의 온도가 소정온도 이상으로 상승하여 과열되게 되면, 자동적으로 텔레비젼 수상기를 오프시킴으로써 텔레비젼 수상기의 과열을 방지할 수 있게 된다.As described above, according to the present invention, if the temperature at the output end of the vertical deflection drive unit rises above a predetermined temperature and becomes overheated, it is possible to prevent overheating of the television receiver by automatically turning off the television receiver.

Claims (1)

수직편향 구동부(1)의 출력단에 차례로 병렬, 접속되어 있으면서 온도에 대한 저항특성이 서로 다른 2개의 더미스터(THR1, THR2)와, 이 2개의 더미스터중 동일한 온도에서의 저항값이 상대적으로 더 큰 더미스터(THR1)의 후단에 접속되면서 이 더미스터(THR1)를 통해 일정레벨 이상의 전류가 흐르게 되면 턴온됨으로써 상기 수직편향 구동부(1)의 출력을 접지시키도록 된 스위칭 수단(Q1), 동일한 온도에서의 저항값이 상대적으로 작은 더미스터(THR2)의 후단에 접속되면서 상기 수직편향 구동부(1)의 출력단 온도가 소정온도 이상으로 상승하면 발광하여 온도상승을 경고하도록 된 온도상승 경고회로(Z1), 상기 수직편향 구동부(1)로부터의 구동출력이 일정레벨 이하로 되는 것을 검출하는 레벨검출회로(2)및, 상기 레벨검출 회로(2)로부터의 검출신호에 따라 전원회로부(4)의 동작을 온, 오프되도록 제어하는 마이콤(3)을 구비하여 구성됨을 특징으로 하는 텔레비젼 수상기의 과열보호장치.Two dummysters THR1 and THR2, which are connected in parallel to the output terminal of the vertical deflection drive unit 1 in turn and differ from each other in temperature resistance, and have relatively higher resistance values at the same temperature among the two dummysters. Switching means Q1 connected to the rear end of the large dummyster THR1 and turned on when a current of a predetermined level or more flows through the dummyster THR1 to ground the output of the vertical deflection drive unit 1 and the same temperature. The temperature rise warning circuit Z1 is configured to emit light when the output stage temperature of the vertical deflection drive unit 1 rises above a predetermined temperature while being connected to the rear end of the dummyster THR2 having a relatively small resistance value. And a power supply circuit according to the detection signal from the level detection circuit 2 and a level detecting circuit 2 for detecting that the drive output from the vertical deflection driving section 1 is below a predetermined level. Overheating protection device of the television receiver, characterized by configured by comprising a microcomputer (3) for controlling so that the on and off operations of the unit (4).
KR1019930023037A 1993-11-01 1993-11-01 Device for protecting overheat of television receiver KR970003430B1 (en)

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Application Number Priority Date Filing Date Title
KR1019930023037A KR970003430B1 (en) 1993-11-01 1993-11-01 Device for protecting overheat of television receiver

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Application Number Priority Date Filing Date Title
KR1019930023037A KR970003430B1 (en) 1993-11-01 1993-11-01 Device for protecting overheat of television receiver

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KR950016207A KR950016207A (en) 1995-06-17
KR970003430B1 true KR970003430B1 (en) 1997-03-18

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