KR19990030972A - Degaussing coil control method of cathode ray tube - Google Patents
Degaussing coil control method of cathode ray tube Download PDFInfo
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- KR19990030972A KR19990030972A KR1019970051480A KR19970051480A KR19990030972A KR 19990030972 A KR19990030972 A KR 19990030972A KR 1019970051480 A KR1019970051480 A KR 1019970051480A KR 19970051480 A KR19970051480 A KR 19970051480A KR 19990030972 A KR19990030972 A KR 19990030972A
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Abstract
텔레비젼이 턴-온되어 디가우싱코일이 동작 개시되면, 디가우싱코일의 동작시간 이전에 텔레비전이 턴-오프되더라도 디가우싱코일을 설정된 기준시간만큼 동작시킨다.When the television is turned on and the degaussing coil starts to operate, the degaussing coil is operated for a set reference time even if the television is turned off before the degaussing coil operation time.
따라서, 음극선관의 착자현상을 방지하고, 항상 안정된 화면을 출력할 수 있다.Therefore, magnetization of the cathode ray tube can be prevented and a stable screen can be output at all times.
Description
본 발명은 음극선관의 디가우싱코일(Degaussing Coil) 제어방법에 관한 것으로서, 보다 상세하게는 텔레비젼의 음극선관 주위에 장착되어 잔류자화성분을 제거하는 디가우싱코일의 동작조건을 개선하여 음극선관의 착자현상을 방지하도록 한 음극선관의 디가우싱코일 제어방법에 관한 것이다.The present invention relates to a method for controlling a degaussing coil of a cathode ray tube, and more particularly, to improve the operating conditions of a degaussing coil installed around a cathode ray tube of a television to remove residual magnetization components. The degaussing coil control method of the cathode ray tube to prevent the magnetization phenomenon of the present invention.
일반적으로, 텔레비젼이 턴-온되면, 순간적인 과전압 및 과전류로 인하여 음극선관에 착자현상이 발생하게 된다. 이러한 착자현상은 초기화면의 왜곡과 흔들림을 발생시켜, 시각적으로 불안정한 화면을 출력할 뿐만 아니라, 이러한 불안정한 화면을 주시하는 사용자는 피로감을 느끼게 된다. 따라서, 음극선관의 초기구동시에 발생하는 착자현상을 제거하기 위하여 음극선관의 주위에 디가우싱코일을 장착하였다.In general, when the television is turned on, a magnetization phenomenon occurs in the cathode ray tube due to instantaneous overvoltage and overcurrent. This magnetization phenomenon causes distortion and shaking of the initial screen, not only to output a visually unstable screen, but also to a user who observes this unstable screen may feel tired. Therefore, the degaussing coil was mounted around the cathode ray tube in order to eliminate the magnetization phenomenon occurring during the initial operation of the cathode ray tube.
디가우싱코일은 음극선관의 초기구동시에 동기되어 소정시간만큼 동작된다. 디가우싱코일이 동작됨에 따라 음극선간에 발생한 잔류자화성분에 대하여 상반되는 극성 또는 위상의 소자전류가 발생하고, 잔류자화성분은 디가우싱코일에서 발생한 소자전류에 의해 상쇄되며, 소정시간이 경과한 후 디가우싱코일에 공급되는 전류가 차단되면 디가우싱코일은 더 이상 동작되지 않으므로, 화면은 안정화된다.The degaussing coil is operated for a predetermined time in synchronization with the initial driving of the cathode ray tube. As the degaussing coil is operated, a device current of opposite polarity or phase occurs with respect to the residual magnetization component generated between the cathode lines, and the residual magnetization component is canceled by the device current generated in the degaussing coil, and a predetermined time has elapsed. After the current supplied to the degaussing coil is cut off, the degaussing coil is no longer operated and the screen is stabilized.
디가우싱코일의 동작시간(T)은 각 제품마다 유사한 값으로 규정되어 있으며, 통상적인 경우 3초로 설정된다. 또한, 텔레비젼이 턴-온되어 디가우싱코일이 동작된 후, 소정시간(대략, 30분) 이내에 텔레비젼이 턴-오프되었다가 다시 턴-온되면, 음극선관의 착자현상이 충분히 제거된 것으로 판단하여 디가우싱코일은 동작되지 않도록 설정되어 있다.The operating time T of the degaussing coil is defined by a similar value for each product, and is normally set to 3 seconds. Also, after the television is turned on and the degaussing coil is operated, if the television is turned off within a predetermined time (approximately 30 minutes) and then turned on again, it is determined that the magnetization of the cathode ray tube is sufficiently removed. The degaussing coil is thus set to be inoperative.
그런데, 이와 같은 종래의 텔레비젼에 의하면 다음과 같은 문제점이 발생한다.By the way, according to such a conventional television, the following problems arise.
즉, 텔레비젼이 턴-온되었다가 디가우싱코일의 동작시간(미리 설정된 디가우싱코일의 기준시간, 여기서는 3초로 설정되어 있음) 이전에 턴-오프되는 경우, 디가우싱코일은 정상적인 시간만큼 동작되지 않으므로 음극선관의 착자현상이 완벽하게 제거되지 못한다. 그리고, 소정시간 이내에 텔레비젼이 턴-온되면 디가우싱코일은 더 이상 동작되지 않으므로, 음극선관의 착자현상이 계속 잔류한다.That is, if the television is turned on and then turned off before the operating time of the degaussing coil (which is set to the preset reference time of the degaussing coil, here 3 seconds), the degaussing coil is set to the normal time. As it is not operated, magnetization of cathode ray tube cannot be completely removed. Then, if the television is turned on within a predetermined time, the degaussing coil is no longer operated, so that magnetization of the cathode ray tube remains.
따라서, 본 발명은 이와 같은 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 텔레비젼이 턴-온되어 디가우싱코일이 동작 개시되면, 디가우싱코일의 동작시간 이전에 텔레비전이 턴-오프되더라도 디가우싱코일을 설정된 기준시간만큼 동작시키도록 한 음극선관의 디가우싱코일 제어방법을 제공함에 있다.Accordingly, an object of the present invention is to solve such a problem, and an object of the present invention is that if the television is turned on and the degaussing coil starts to operate, the degassing coil is operated even if the television is turned off before the degaussing coil operation time. The present invention provides a method for controlling the degaussing coil of a cathode ray tube to operate a Gaussing coil for a predetermined reference time.
도 1은 본 발명에 적용된 디가우싱코일 제어장치의 개략적 블럭도,1 is a schematic block diagram of a degaussing coil control apparatus applied to the present invention;
도 2는 본 발명에 의한 디가우싱코일 제어방법의 수행과정을 나타내는 동작흐름도,2 is a flowchart illustrating an operation of the degaussing coil control method according to the present invention;
도 3은 메인전원과 디가우싱코일의 동작타이밍도이다.3 is an operation timing diagram of the main power supply and the degaussing coil.
＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>
1: 전원부 2: 음극선관1: power supply 2: cathode ray tube
3: 디가우싱코일 4: 디가우싱코일 구동부3: degaussing coil 4: degaussing coil driving unit
5: 제어부 6: 타이머5: control unit 6: timer
이와 같은 목적을 달성하기 위한 본 발명의 특징은, 음극선관의 디가우싱코일 제어방법에 있어서: 메인전원이 턴-온되면 상기 디가우싱코일을 구동하는 구동단계; 상기 디가우싱코일의 구동시간을 검출하여 미리 설정된 기준시간을 경과하였는가를 체크하는 체크단계; 상기 디가우싱코일의 구동시간이 상기 기준시간을 경과한 경우, 상기 디가우싱코일의 구동을 중지하는 중지단계; 및 상기 디가우싱코일의 구동시간이 상기 기준시간을 경과하지 않은 경우, 상기 메인전원이 턴-오프되면, 상기 음극선관의 전원공급을 차단하고, 상기 디가우싱코일을 상기 기준시간동안 계속 구동한 후 중지하는 부분구동단계를 포함하는 음극선관의 디가우싱코일 제어방법에 있다.A feature of the present invention for achieving the above object is a method for controlling a degaussing coil of a cathode ray tube: a driving step of driving the degaussing coil when a main power source is turned on; A checking step of detecting whether a preset reference time has elapsed by detecting a driving time of the degaussing coil; Stopping the driving of the degaussing coil when the driving time of the degaussing coil has passed the reference time; And when the main power is turned off when the driving time of the degaussing coil does not pass the reference time, the power supply of the cathode ray tube is cut off, and the degaussing coil is continuously driven for the reference time. The degaussing coil control method of the cathode ray tube including a partial driving step of stopping after.
바람직하게, 상기 기준시간은, 상기 디가우싱코일에서 발생된 소자전류가 상기 음극선관의 잔류자화성분을 충분히 제거할 수 있는 소정시간을 포함한다.Preferably, the reference time includes a predetermined time for the device current generated in the degaussing coil to sufficiently remove the residual magnetization component of the cathode ray tube.
이하, 본 발명에 의한 음극선관의 디가우싱코일 제어방법의 바람직한 실시예에 대하여 첨부도면을 참조하여 상세히 설명한다.Hereinafter, a preferred embodiment of the degaussing coil control method of a cathode ray tube according to the present invention will be described in detail with reference to the accompanying drawings.
도 1에는 본 발명에 적용된 디가우싱코일 제어장치의 개략적 블럭도가 도시되어 있다.1 shows a schematic block diagram of a degaussing coil control apparatus applied to the present invention.
도 1에 도시된 바와 같이 디가우싱코일 제어장치는, 교류상용전원(AC)을 입력받아 텔레비젼내의 각 구성부에서 요구하는 전압레벨로 변환하는 전원부(1)와, 전원부(1)로부터 변환된 소정레벨의 전압을 인가받아 화상을 형성하는 음극선관(2)과, 음극선관(2) 주위에 장착되어 음극선관(2)에 잔류하는 자화성분을 소자하는 디가우싱코일(3)과, 디가우싱코일(3)의 구동상태를 제어하는 디가우싱코일 구동부(4)와, 메인전원 온/오프신호에 따라 전원부(1)와 디가우싱코일 구동부(4)의 동작상태를 제어하는 제어부(5)와, 시각정보를 제어부(5)에 제공하는 타이머(6)로 구성되어 있다.As shown in Fig. 1, the degaussing coil control apparatus includes a power supply unit 1 which receives an AC commercial power source AC and converts it into a voltage level required by each component in the television, and the power supply unit 1 converted from the power supply unit 1. A cathode ray tube 2 which forms an image by applying a voltage of a predetermined level, a degaussing coil 3 which is mounted around the cathode ray tube 2 and which retains a magnetization component remaining in the cathode ray tube 2, and Degaussing coil driver 4 for controlling the driving state of the Gaussing coil 3, and a control unit for controlling the operating state of the power supply unit 1 and the degaussing coil driver 4 according to the main power on / off signal (5) and a timer (6) for providing time information to the control unit (5).
이와 같은 구성을 갖는 본 발명의 동작에 대하여 도 2 및 도 3을 참조하여 설명하면 다음과 같다.An operation of the present invention having such a configuration will be described below with reference to FIGS. 2 and 3.
텔레비젼의 메인전원 온/오프신호에 의해 텔레비젼의 메인전원이 턴-온되면(S1), 제어부(5)는 타이머(6)가 카운팅동작을 개시하도록 제어하고(S2), 이와 동시에 디가우싱코일 구동부(4)를 제어하여 디가우싱코일(3)을 구동시킨다(S3).When the main power of the television is turned on by the main power on / off signal of the television (S1), the control section 5 controls the timer 6 to start the counting operation (S2), and at the same time the degaussing coil The driving unit 4 is controlled to drive the degaussing coil 3 (S3).
이후, 제어부(5)는 타이머(6)에 의해 카운팅된 값으로부터 디가우싱코일(3)의 구동시간을 검출하고(S4), 검출된 디가우싱코일(3)의 구동시간이 미리 설정된 기준시간(T)을 경과하였는가를 체크한다(S5). 이 단계 5(S5)에서 디가우싱코일(3)의 구동시간이 기준시간(T)을 경과하였다고 판단되면, 이것은 음극선관(2)의 잔류자화성분이 충분히 소자된 상태를 나타내므로, 제어부(5)는 디가우싱코일 구동부(4)를 제어하여 디가우싱코일(3)의 구동을 중지시킨다(S6).Subsequently, the controller 5 detects the driving time of the degaussing coil 3 from the value counted by the timer 6 (S4), and sets the preset driving time of the detected degaussing coil 3 in advance. It is checked whether the time T has passed (S5). If it is determined in this step 5 (S5) that the driving time of the degaussing coil 3 has passed the reference time T, this indicates that the residual magnetization component of the cathode ray tube 2 is sufficiently demagnetized, so that the control unit ( 5) the degaussing coil driving unit 4 is controlled to stop driving of the degaussing coil 3 (S6).
한편, 위의 단계 5(S5)에서 디가우싱코일(3)의 구동시간이 기준시간(T)을 경과하지 않았다고 판단되면, 메인전원이 턴-오프되었는가를 체크하여(S7), 메인전원이 턴-오프되지 않았다고 판단되면 제어부(5)는 위의 단계 4(S4)로 진행하여 단계 4(S4) 이후의 모든 과정을 반복 수행한다.On the other hand, if it is determined in step 5 (S5) that the driving time of the degaussing coil 3 has not passed the reference time T, it is checked whether the main power is turned off (S7), and the main power is If it is determined that the turn-off is not turned off, the controller 5 proceeds to step 4 (S4), and repeats all the processes after step 4 (S4).
만약, 위의 단계 5(S5)에서 메인전원이 턴-오프되었다고 판단되면, 이것은 음극선관(2)의 잔류자화성분을 충분히 소자하지 못한 상태에서 텔레비젼이 턴-오프된 상태를 나타내므로(도 3 참조), 제어부(5)는 디가우싱코일(3)과 텔레비젼의 기본구성부(메인전원이 차단되더라도 기본적인 전원이 공급되어 구동되는 구성부로서, 예컨대, 타이머(6), 제어부(5) 등을 칭함)를 제외한 나머지 구성부(특히, 음극선관(2))를 턴-오프시킨 후(S8), 위의 단계 4(S4)로 귀환하여 단계 4(S4) 이후의 모든 과정을 반복 수행한다. 이에 따라, 디가우싱코일(3)의 미리 설정된 기준시간(T)동안 계속 구동되어 충분한 소자효과를 얻을 수 있다.If it is determined in step 5 (S5) that the main power source is turned off, this indicates that the television is turned off in a state in which the residual magnetization component of the cathode ray tube 2 is not sufficiently elemented (Fig. 3). The control unit 5 is a degaussing coil 3 and a basic component of the television (a component which is supplied and driven even if the main power is cut off, for example, the timer 6, the controller 5, etc.). After turning off the remaining components (particularly, the cathode ray tube 2) except for (S8) (S8), and returns to the above step 4 (S4) to repeat all the steps after the step 4 (S4). . Accordingly, the degaussing coil 3 is continuously driven for a predetermined reference time T, thereby obtaining a sufficient device effect.
결국, 본 발명에 의한 음극선관의 디가우싱코일 제어방법에 따르면, 다음과 같은 이점이 발생한다.As a result, according to the degaussing coil control method of the cathode ray tube according to the present invention, the following advantages occur.
즉, 메인전원이 턴-온된 후 디가우싱코일이 구동 개시되면, 메인전원의 온-오프상태에 관계없이 미리 설정된 기준시간만큼 디가우싱코일이 동작되도록 설정함으로써, 음극선관의 착자현상을 방지하고, 항상 안정된 화면을 출력할 수 있다.That is, when the degaussing coil is started after the main power is turned on, the degaussing coil is operated for a predetermined reference time regardless of the on-off state of the main power supply, thereby preventing magnetization of the cathode ray tube. And a stable screen can be output at all times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970051480A KR100260903B1 (en) | 1997-10-08 | 1997-10-08 | Degaussing coil control method in crt |
| JP28633098A JP3000004B2 (en) | 1997-10-08 | 1998-10-08 | Degaussing coil control method and degaussing coil control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970051480A KR100260903B1 (en) | 1997-10-08 | 1997-10-08 | Degaussing coil control method in crt |
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| KR19990030972A true KR19990030972A (en) | 1999-05-06 |
| KR100260903B1 KR100260903B1 (en) | 2000-07-01 |
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1997
- 1997-10-08 KR KR1019970051480A patent/KR100260903B1/en not_active IP Right Cessation
-
1998
- 1998-10-08 JP JP28633098A patent/JP3000004B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR100260903B1 (en) | 2000-07-01 |
| JPH11196430A (en) | 1999-07-21 |
| JP3000004B2 (en) | 2000-01-17 |
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