KR970002995B1 - Power apparatus of tv. - Google Patents
Power apparatus of tv. Download PDFInfo
- Publication number
- KR970002995B1 KR970002995B1 KR1019940006122A KR19940006122A KR970002995B1 KR 970002995 B1 KR970002995 B1 KR 970002995B1 KR 1019940006122 A KR1019940006122 A KR 1019940006122A KR 19940006122 A KR19940006122 A KR 19940006122A KR 970002995 B1 KR970002995 B1 KR 970002995B1
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- KR
- South Korea
- Prior art keywords
- smps
- rectifier
- power supply
- voltage
- television
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- 238000010586 diagram Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 1
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- Television Receiver Circuits (AREA)
Abstract
내용없음No content
Description
제1도는 종래 텔레비젼의 전원장치의 구성을 나타낸 도면.1 is a diagram showing the configuration of a power supply of a conventional television.
제2도는 본 발명에 따른 텔레비젼의 전원장치의 구성을 나타낸 도면.2 is a diagram showing the configuration of a power supply unit for a television according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 대기전원부 2 : SMPS1: standby power unit 2: SMPS
3 : SMPS트랜스포머 RY : 릴레이3: SMPS Transformer RY: Relay
RF1 : 제1정류기 FR2 : 제2정류기RF1: First Rectifier FR2: Second Rectifier
본 발명은 텔레비젼의 전원장치에 관한 것으로, 특히 저전압에서 텔레비젼을 온하는 경우에 AFT(Auto Fine Tunning)동작이 교란되는 것을 방지할 수 있도록 된 텔레비젼의 전원장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply for a television, and more particularly, to a power supply for a television that is capable of preventing disturbance of the AFT (Auto Fine Tunning) operation when the television is turned on at a low voltage.
현재, 텔레비젼에 사용되는 전원장치는 전원이 온되면, 텔레비젼 내부의 마이크로 컴퓨터에 의해 릴레이수단이 온되고, 그에 따라 소정의 전원부가 순차적으로 동작하도록 되어 있다.At present, when a power supply is used for a television, the relay means is turned on by a microcomputer in the television, so that a predetermined power supply unit is sequentially operated.
종래 텔레비젼의 전원장치의 동작을 도면을 참조하면서 설명하기로 한다.The operation of the power supply of the conventional television will be described with reference to the drawings.
제1도는 종래 텔레비젼의 전원장치의 구성을 나타낸 도면으로, 도면에서 참조부호 RY는 릴레이로서, 도시하지 않은 마이크로 컴퓨터로 부터 스위칭 트랜지스터(Q1)로 예컨대 하이레벨의 신호가 인가되는 경우에 온되어 후술한 정류기(RF1)로 외부의 AC전원이 공급되도록 한다. 참조번호1은 대기전원을 공급하는 대기전원부이고, 2는 상기 정류기(RF1)에서 정류된 DC전압이 인가되면 동작을 개시하는 SMPS로서, 이것에 의해 참조번호 3으로 표시된 SMPS트랜스포머가 동작하여 텔레비젼의 각 부분에 동작전원을 공급하도록 되어 있다.1 is a diagram showing the configuration of a power supply of a conventional television. In the drawing, reference numeral RY is a relay, which is turned on when a high level signal is applied from the microcomputer (not shown) to the switching transistor Q1, for example. An external AC power source is supplied to one rectifier (RF1). Reference numeral 1 denotes a standby power supply unit for supplying standby power, and 2 denotes an SMPS which starts operation when a rectified DC voltage is applied from the rectifier RF1, whereby the SMPS transformer indicated by reference numeral 3 operates to operate the television. It is intended to supply the operating power to each part.
그런데, 상기한 구성에서 외부의 AC 전압이 정격전압보다 낮은 저전압인 경우에는 텔레비젼의 전원 온시에 정류부(RF1)의 정류전압이 낮아지게 되고, 그에 따라 상기 SMPS(2)에서의 전원의 인가시간(상승시간)이 지연되는 현상이 발생된다.However, in the above configuration, when the external AC voltage is lower than the rated voltage, the rectified voltage of the rectifying unit RF1 is lowered when the TV is turned on, and accordingly, the application time of the power source in the SMPS 2 The rise time) is delayed.
SMPS(2)의 전압상승이 지연되면 AFT동작이 교란되며, 그에 따라 AFT동작의 동기성이 일시적으로 균형을 잃게 되는 문제점이 있었다.When the voltage rise of the SMPS 2 is delayed, the AFT operation is disturbed, and thus, the synchronization of the AFT operation is temporarily lost.
본 발명은 상기한 문제점을 감안해서 창출된 것으로, 저전압 동작시에 SMPS의 전압상승이 지연되어 AFT동작이 교란되는 문제점을 개선한 텔레비젼의 전원장치를 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a power supply device for a television that has improved the problem that AFT operation is disturbed due to a delay in voltage rise of SMPS during low voltage operation.
상기 목적을 달성하기 위한 본 발명에 따른 텔레비젼의 전원장치는 마이크로 컴퓨터에 의해 스위칭되는 스위칭 트랜지스터와 이 스위칭 트랜지스터의 온/오프에 따라 외부의 AC전원을 단속하는 릴레이, 외부의 AC전원을 전파정류하는 제1정류부, 외부의 전원을 반파정류하는 제2정류부, 상기 제1정류부에서 정류된 DC전압을 공급받는 SMPS트랜스포머, 상기 제2정류부에서 정류된 DC전압을 공급받음과 더불어 상기 SMPS트랜스포머의 동작을 제어하는 SMPS를 포함하여 구성된 것을 특징으로 한다.The power supply apparatus of a television according to the present invention for achieving the above object is a switching transistor switched by a microcomputer and a relay for intermittent external AC power in accordance with the on / off of the switching transistor, full-wave rectifying the external AC power A first rectifier, a second rectifier for half-wave rectifying an external power source, an SMPS transformer supplied with a DC voltage rectified by the first rectifier, a DC voltage rectified by the second rectifier, and an operation of the SMPS transformer Characterized in that configured to control the SMPS.
상기 구성으로 된 본 발명에 따른 텔레비젼의 전원장치에 의하면, 상기 SMPS로 별도의 정류장치를 통해 외부의 AC전원이 공급되므로 전압상승의 지연으로 인해 AFT동작이 교란되는 문제점이 개선된 텔레비젼의 전원장치가 실현된다.According to the power supply apparatus of the television according to the present invention having the above configuration, since the external AC power is supplied to the SMPS through a separate stop value, the power supply apparatus of the TV improved the problem that the AFT operation is disturbed due to the delay of the voltage rise. Is realized.
이하, 도면을 참조하여 본 발명의 실시예를 설명한다.Hereinafter, embodiments of the present invention will be described with reference to the drawings.
제2도는 본 발명의 제1실시예에 따른 텔레비젼의 전원장치의 구성을 나타낸 도면으로, 도면에서 상기 제1도와 동일한 구성요소에 대해서는 동일한 참조부호를 붙이는 한편 그 설명은 생략하기로 한다.2 is a diagram showing the configuration of a power supply apparatus for a television according to the first embodiment of the present invention, in which the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
도면에서 참조부호 RF1은 제1도에 나타낸 것과 같이 전파정류를 행하는 제1정류기이고, RF2는 다이오드(D3, D4)와 저항(R1, R2)으로 구성되어 반파전류를 행하는 제2정류기이다.In the figure, reference numeral RF1 denotes a first rectifier for full-wave rectification as shown in FIG. 1, and RF2 denotes a second rectifier composed of diodes D3 and D4 and resistors R1 and R2 for performing half-wave current.
상기 제1도의 구성에서는 제1정류기(RF1)의 정류된 DC전압이 SMPS(2)와 SMPS트랜스포머(3)에 공급되도록 구성되어 있었음에 반하여, 본 발명에서는 상기 제2정류기(RF2)를 상기 SMPS(2)에 별도로 부착하고 외부의 AC가 곧바로 상기 제2정류기(RF2)에 공급되도록 연결하였다. 따라서, 저전압에서 텔레비젼을 온시키는 경우에 종래에는 상기 제1정류기(RF1)를 통해 전파정류된 DC전압이 상기 SMPS(2)에 인가되어 전압상승의 지연을 발생시키는 반면에 본 발명에서는 상기 제2정류기(RF2)를 통해 반파정류된 DC전압이 상기 SMPS(2)에 공급되므로 SMPS(2)의 전압상승의 지연현상이 제거된다.In the configuration of FIG. 1, the rectified DC voltage of the first rectifier RF1 is configured to be supplied to the SMPS 2 and the SMPS transformer 3, whereas in the present invention, the second rectifier RF2 is connected to the SMPS. Attached separately to (2) and connected so that external AC was supplied directly to the second rectifier RF2. Therefore, when the television is turned on at a low voltage, the DC voltage propagated through the first rectifier RF1 is conventionally applied to the SMPS 2 to generate a delay of voltage rise. Since the half-wave rectified DC voltage is supplied to the SMPS 2 through the rectifier RF2, the delay phenomenon of the voltage rise of the SMPS 2 is eliminated.
따라서 SMPS(2)에서의 전압상승의 지연으로 인해 AFT동작이 교란되는 문제점이 해결된다.Therefore, the problem that the AFT operation is disturbed due to the delay of the voltage rise in the SMPS 2 is solved.
이상에서 설명한 바와 같이, 본 발명에 따른 텔레비젼의 전원장치에 의하면, 상기 SMPS에 별도의 정류기를 통해 외부의 AC전압이 인가되므로써 AFT동작상 교란을 방지할 수 있게 된다.As described above, according to the power supply apparatus of the television according to the present invention, an external AC voltage is applied to the SMPS through a separate rectifier, thereby preventing disturbance in AFT operation.
또한, 본 발명은 상기 실시예에 한정되지는 않으며 본원 발명의 기술적 요지를 벗어나지 않는 범위내에서 변형실시할 수 있다.In addition, the present invention is not limited to the above embodiments and may be modified without departing from the technical scope of the present invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940006122A KR970002995B1 (en) | 1994-03-26 | 1994-03-26 | Power apparatus of tv. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940006122A KR970002995B1 (en) | 1994-03-26 | 1994-03-26 | Power apparatus of tv. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR970002995B1 true KR970002995B1 (en) | 1997-03-13 |
Family
ID=19379659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940006122A KR970002995B1 (en) | 1994-03-26 | 1994-03-26 | Power apparatus of tv. |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970002995B1 (en) |
-
1994
- 1994-03-26 KR KR1019940006122A patent/KR970002995B1/en not_active IP Right Cessation
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