KR940007077Y1 - Apparatus for compensating tv screen variation by temperature - Google Patents
Apparatus for compensating tv screen variation by temperature Download PDFInfo
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- KR940007077Y1 KR940007077Y1 KR2019880019723U KR880019723U KR940007077Y1 KR 940007077 Y1 KR940007077 Y1 KR 940007077Y1 KR 2019880019723 U KR2019880019723 U KR 2019880019723U KR 880019723 U KR880019723 U KR 880019723U KR 940007077 Y1 KR940007077 Y1 KR 940007077Y1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/04—Deflection circuits ; Constructional details not otherwise provided for
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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
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/227—Centering
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0464—Positioning
- G09G2340/0478—Horizontal positioning
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Abstract
내용 없음.No content.
Description
제1도는 종래의 수평 편향 회로도.1 is a conventional horizontal deflection circuit diagram.
제2도의 (a), (b)는 동기신호와 백펄스의 위상 비교 파형도.(A) and (b) of FIG. 2 are phase comparison waveform diagrams of a synchronization signal and a back pulse.
제3도는 본 고안의 화면 위치 보상 회로도.3 is a screen position compensation circuit diagram of the present invention.
제4도는 제3도의 위상 비교용 IC의 입출력 특성 그래프.4 is a graph of input and output characteristics of the phase comparison IC of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
3 : 위상비교부 4 : 완충증폭부3: phase comparison unit 4: buffer amplification unit
IC1 : 수평발진용 IC IC2 : 위상비교용 ICIC1: Horizontal oscillation IC IC2: Phase comparison IC
FBT : 플라이백트랜스 VR1, VR2 : 가변저항FBT: Flyback transformer VR1, VR2: Variable resistor
본 고안은 영상 디스플레이 기기에서 화면 위치의 변화량을 위상 비교한 후 그 위상차에 따라 화면 위치를 제어하여 온도에 의한 화면 위치 변화를 보상할 수 있도록 한 화면 위치 보상회로에 관한 것이다.The present invention relates to a screen position compensating circuit for compensating for screen position change due to temperature by comparing a phase change amount of a screen position in a video display device and controlling the screen position according to the phase difference.
종래의 수평 편향 회로는 제1도에서와 같이 입력된 수평동기신호에 동기하는 소정주파수의 발진신호를 발생시키는 수평발진부(1)와, 상기 수평발진부(1)의 출력 파형을 증폭 및 정형한 후 플라이백 트랜스(FBT)의 고압을 이용해 수평편향을 위한 백펄스를 발생시키는 수평출력부(2)로 구성되어 있다.In the conventional horizontal deflection circuit, as shown in FIG. 1, after amplifying and shaping the horizontal oscillation unit 1 for generating an oscillation signal having a predetermined frequency synchronized with the input horizontal synchronization signal, and the output waveform of the horizontal oscillation unit 1, It is composed of a horizontal output unit (2) for generating a back pulse for horizontal deflection by using the high pressure of the flyback transformer (FBT).
그 상세 구성을 보면, 입력단자(IN)를 통해 수평동기신호가 인가되는 수평발진용 IC(IC1)의 위상조절단자(P/C)에는 가변 저항(VR1)을 연결하여 접지시키는 한편, 출력단자(OUT)는 저항(R1)을 통하여 에미터가 접지된 트랜지스터(TR1)의 베이스에 연결하고, 트랜지스터(TR1)의 콜렉터는 저항(R2)을 통해 바이어스전원(B+) 단자에 연결함과 동시에 병렬로 접속된 저항(R3)과 콘덴서(C1)를 통해 에미터가 접지된 트랜지스터(TR2)의 베이스에 연결하고, 그 베이스는 직렬 접속된 저항(R4) 및 다이오드(D1)를 통해 접지시키며, 트랜지스터(TR2)의 콜렉터는 플라이백 트랜스(FBT)의 단자(NP)에 접속하고, 트랜지스터(TR2)의 콜렉터와 접지 사이에는 댐퍼 다이오드(D2)와 튜닝 콘덴서(C2)를 병렬로 접속하되, 댐퍼 다이오드(D2)의 애노드는 접지쪽으로 연결하며, 편향 코일 회로를 트랜지스터(TR2)의 콜렉터에 접속한다.In detail, the variable resistor VR1 is connected and grounded to the phase adjusting terminal P / C of the horizontal oscillation IC IC1 to which the horizontal synchronizing signal is applied through the input terminal IN, and the output terminal is connected to ground. OUT is connected to the base of the transistor TR1 having the emitter grounded through the resistor R1, and the collector of the transistor TR1 is connected to the bias power supply B + terminal through the resistor R2 and in parallel. The emitter is connected to the base of the grounded transistor TR2 through a resistor R3 and a capacitor C1 connected to each other, and the base is grounded through a resistor R4 and a diode D1 connected in series. The collector of TR2 is connected to the terminal NP of the flyback transformer FBT, and the damper diode D2 and the tuning capacitor C2 are connected in parallel between the collector of the transistor TR2 and ground, but the damper diode The anode of (D2) is connected to ground and the deflection coil circuit is It is connected to the collector of (TR2).
이와 같이 구성된 종래 회로의 동작은 수평발진용 IC(IC1)의 입력단자(IN)에 수평동기신호가 인가되면, 수평발진용IC(IC1)의 발진 주파수가 수평동기신호의 주파수에 동기되어 수평발진용 IC(IC1)의 출력단자(OUT)로 출력되고, 이 출력 전압은 저항(R1)을 통해 트랜지스터(TR1)의 베이스에 인가되어 여기서 위상 반전 및 증폭된 후 콜렉터에 연결된 저항(R3)과 교류 신호 전달용 콘덴서(C1)를 통해 트랜지스터(TR2)의 베이스에 인가된다.In the operation of the conventional circuit configured as described above, when the horizontal synchronization signal is applied to the input terminal IN of the horizontal oscillation IC IC1, the oscillation frequency of the horizontal oscillation IC IC1 is synchronized with the frequency of the horizontal synchronization signal. The output voltage is output to the output terminal OUT of the IC IC1, and this output voltage is applied to the base of the transistor TR1 through the resistor R1, where the phase is inverted and amplified, and then alternated with the resistor R3 connected to the collector. It is applied to the base of the transistor TR2 via the signal transfer capacitor C1.
요기서, 저항(R2)은 트랜지스터(TR1)의 부하저항이고, 저항(R4)과 다이오드(D1)는 트랜지스터(TR2)의 입력신호 클램핑용이며, 트랜지스터(TR2)는 수평 편향 출력용이고, 다이오드(D2)는 댐핑용, 콘덴서(C2)는 백펄스폭을 설정하는 튜닝콘덴서로 동작한다.Here, the resistor R2 is a load resistance of the transistor TR1, the resistor R4 and the diode D1 are for clamping the input signal of the transistor TR2, the transistor TR2 is for a horizontal deflection output, and the diode D2. ) Is for damping, and capacitor C2 acts as a tuning capacitor to set the back pulse width.
따라서, 트랜지스터(TR2)가 스위칭될때마다 제2도의 (a)에서와 같이 플라이백 트랜스(FBT)의 고압을 이용한 높은 전압의 백펄스가 발생되어 편향 코일로 인가되고, 이 상태에서 위상 조절용 가변 저항(VR1)을 조절하면 제2도의 (b)와 같이 백펄스의 위상이 변화되어 디스플레이되는 화면의 위치가 변화된다.Therefore, whenever the transistor TR2 is switched, a high voltage back pulse using the high voltage of the flyback transformer FBT is generated and applied to the deflection coil as shown in FIG. Adjusting the VR1 changes the phase of the back pulse as shown in (b) of FIG. 2, thereby changing the position of the displayed screen.
그러나 이러한 종래의 방식은 제품이 동작 상태에서 시간이 지속되면, 소비전력이 많은 수평편향 회로에는 열이 발생하고, 이 열에 의해 부품의 특성 변화가 발생된다.However, this conventional method generates heat in the horizontal deflection circuit, which consumes a lot of power when the product lasts in the operating state, and this heat causes a change in the characteristics of the component.
이러한 부품의 특성변화는 제2도의 (b)의 △T값 변화량이 되고, 이와 같은 변화량에 의해 화면의 위치가 변화된다.Such a change in the characteristics of the part becomes a change in the value of DELTA T in FIG. 2B, and the position of the screen changes according to the change.
이와 같이 처음 설정된 화면의 위치가 주위에서 발생된 열에 의해 이동하는 문제점이 발생하였다.As described above, a problem arises in that the position of the screen set for the first time is moved by heat generated around the screen.
본 고안은 상기와 같은 종래의 문제점을 해결하기 위하여 안출한 것인바, 입력된 수평동기신호와 수평출력부에서 발생된 백펄스의 위상을 비교하여 그 위상차에 따라 수평 발진신호의 위상을 조절함으로써 온도 상승에 의해 화면의 위치가 변화되는 것을 보상해 줄 수 있도록 함을 그 목적으로 한다.The present invention has been devised to solve the above-described problems, by comparing the phase of the input horizontal synchronization signal and the back pulse generated from the horizontal output unit by adjusting the phase of the horizontal oscillation signal according to the phase difference The purpose of the present invention is to compensate for the change in the position of the screen due to the rising.
이하 첨부된 제3도 및 제4도를 참조하여 본 고안의 실시예를 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4 as follows.
제3도는 본 고안의 화면위치 보상 회로도로서 이에 도시된 바와 같이 입력된 수평 동기 신호에 동기하는 소정 주파수의 발진신호를 발생시키는 수평발진부(1)와, 수평발진부(1)의 출력 파형을 증폭 및 정형한 후 플라이백 트랜스(FBT)의 고압을 이용해 백펄스를 발생시키는 수평출력부(2)의 구성은 종래 회로의 구성과 동일하다.3 is a screen position compensation circuit diagram of the present invention, as shown therein, a horizontal oscillation unit 1 for generating an oscillation signal having a predetermined frequency synchronized with an input horizontal synchronizing signal, and amplifying an output waveform of the horizontal oscillation unit 1; After shaping, the configuration of the horizontal output unit 2 that generates the back pulse using the high pressure of the flyback transformer FBT is the same as that of the conventional circuit.
본 고안의 특징부는 수평출력부(2)에서 출력된 백펄스와 입력된 수평 동기신호의 위상을 비교하여 위상차에 상응하는 전압을 발생시키는 위상 비교부(3)와, 위상 비교부(3)의 출력 전압을 완충 증폭하여 위상차를 보상하도록 수평발진부(1)에 인가하는 완충 증폭부(4)이다.The feature of the present invention is that the phase comparator 3 and the phase comparator 3 which generate a voltage corresponding to the phase difference by comparing the phase of the back pulse outputted from the horizontal output unit 2 and the input horizontal synchronization signal. A buffer amplifying section 4 is applied to the horizontal oscillation section 1 to buffer amplify the output voltage to compensate for the phase difference.
본 고안의 상세 구성을 보면, 입력단자(IN)를 통해 수평 동기신호가 인가되는 수평발진용 IC(IC1)의 위상조절단자(P/C)에는 가변저항(TR1)을 연결하여 접지시키는 한편, 그 출력단자(OUT)는 저항(R1)을 통하여 에미터가 접지된 트랜지스터(TR1)의 베이스에 연결하고, 트랜지스터(TR1)의 콜렉터는 저항(R2)을 통해 바이어스전원(B+) 단자에 연결함과 동시에, 병렬접속된 저항(R3)과 콘덴서(C1)를 통해 에미터가 접지된 트랜지스터(TR2)의 베이스에 연결하고, 그 베이스는 직렬 접속된 저항(R4) 및 다이오드(D1)를 통해 접지시키며, 트랜지스터(TR2)의 콜렉터는 플라이백트랜스( FBT)의 단자(NP)에 접속하고, 트랜지스터(TR2)의 콜렉터와 접지 사이에는 댐퍼 다이오드(D2)와 튜닝콘덴서(C2)를 접속하되, 댐퍼 다이오드(D2)의 애노드는 접지쪽으로 연결하며, 편향 코일 회로는 트랜지스터(TR2)의 콜렉터에 접속하고, 또한 트랜지스터(TR2)의 콜렉터는 직렬 연결된 저항(R5) (R6)을 통해 접지하고, 그 접속점은 저항(R7)을 통해 위상비교용 IC(IC2)의 입력단자(A)에 연결하며, 위상비교용 IC(IC2)의 다른 입력단자(B)는 저항(R8)을 통해 수평동기신호입력단에 연결함과 동시에, 기준 위상 조절단자(C)는 기준위상 조절용 가변저항(VR2)을 통해 접지시키고, 위상 비교용 IC(IC2)의 출력단자(OUT)는 저항(R9)을 통해 트랜지스터(TR3)의 베이스와 저항(R10)에 연결하여 접지하고, 트랜지스터(TR3)의 콜렉터는 저항(R11)을 거쳐 바이어스 전원(B+) 단자에 연결하며, 트랜지스터(TR3)의 에미터는 저항(R12)을 거쳐 접지시킴과 동시에 저항(R13)을 거쳐 수평발진용 IC(IC1)의 위상 조절단자(P/C)에 연결한다.According to a detailed configuration of the present invention, while connecting the variable resistor (TR1) to the grounding terminal (P / C) of the horizontal oscillation IC (IC1) to which the horizontal synchronization signal is applied through the input terminal (IN), The output terminal OUT is connected to the base of the transistor TR1 having the emitter grounded through the resistor R1, and the collector of the transistor TR1 is connected to the bias power supply B + terminal through the resistor R2. At the same time, the emitter is connected to the base of the grounded transistor TR2 through a parallel connected resistor R3 and a capacitor C1, and the base is grounded through a series connected resistor R4 and a diode D1. The collector of the transistor TR2 is connected to the terminal NP of the flyback transformer FBT, and a damper diode D2 and a tuning capacitor C2 are connected between the collector of the transistor TR2 and ground, The anode of diode D2 is connected to ground and the deflection coil circuit is a transistor Is connected to the collector of TR2, and the collector of transistor TR2 is grounded through a resistor R5 and R6 connected in series, and its connection point is connected to the input terminal of the IC ICIC for phase comparison via resistor R7. (A), the other input terminal (B) of the phase comparison IC (IC2) is connected to the horizontal synchronization signal input terminal through the resistor (R8), while the reference phase adjustment terminal (C) is variable for the reference phase adjustment The ground is connected through the resistor VR2, and the output terminal OUT of the phase comparison IC IC2 is connected to the base of the transistor TR3 and the resistor R10 through the resistor R9, and grounded. Is connected to the bias power supply (B +) terminal via a resistor (R11), and the emitter of the transistor (TR3) is grounded through a resistor (R12) and at the same time through a resistor (R13) of the IC (IC1) for horizontal oscillation. Connect to phase control terminal (P / C).
이와 같이 구성된 본 고안의 작용 효과는 다음과 같다.Effects of the present invention configured as described above are as follows.
영상 디스플레이 기기가 정상 상태로 동작하고 있는 상태에서 주위의 발열에 의해 제2도의 (b)에서와 같이 위상이 △T값만큼 변화되면, 수평 출력부(2)에서 발생된 백펄스가 저항(R5) (R6)에 의해 분압되어 저항(R7)을 통해 위상비교용 IC(IC2)의 입력단자(A)로 인가되고, 위상 비교용IC(IC2)에서는 저항(R8)을 통해 입력단자(B)로 인가된 수평동기신호와 이 신호의 위상을 비교하여 출력단자(OUT)를 통해 제4도의 특성곡선에서와 같이 위상차에 상응하는 전압을 출력하게 된다.When the video display device is operating in a normal state and the phase is changed by the value? T as shown in (b) of FIG. 2 due to the surrounding heat, the back pulse generated at the horizontal output unit 2 becomes the resistor R5. The voltage is divided by R6 and applied to the input terminal A of the phase comparison IC IC2 through the resistor R7, and the input terminal B through the resistor R8 in the phase comparison IC IC2. By comparing the phase of the signal and the horizontal synchronous signal applied to the output terminal (OUT) to output a voltage corresponding to the phase difference as shown in the characteristic curve of FIG.
이 출력전압은 저항(R9)을 통해 트랜지스터(TR3)의 베이스로 인가되어 전류 증폭된다.This output voltage is applied to the base of transistor TR3 through resistor R9 and amplified by current.
여기서, 트랜지스터(TR3)는 에미터 플로워(Emitter Follower)회로로, 저항(R12)은 에미터저항이고, 저항(R10)은 궤환저항이며, 저항(R11)은 콜렉터 부하저항이다.Here, the transistor TR3 is an emitter follower circuit, the resistor R12 is an emitter resistor, the resistor R10 is a feedback resistor, and the resistor R11 is a collector load resistor.
따라서, 트랜지스터(TR3)에 의해 전류 증폭된 비교전압은 저항(R13)을 통해 수평발진용 IC(IC1)의 위상조절단자(P/C)에 인가되어 제2도의 (b)와 같은 백펄스의 위상 변화량(△T)을 보상한다.Accordingly, the comparison voltage amplified by the transistor TR3 is applied to the phase control terminal P / C of the horizontal oscillation IC IC1 through the resistor R13, so that the back pulse as shown in FIG. Compensate for the phase change amount ΔT.
위상비교용 IC(IC2)의 기준 위상조정은 가변저항(VR2)을 이용하여 두 입력의 위상이 0인 상태(수평발진용 IC(IC1)의 위상조절단자의 가변저항(VR1)을 조절하여 화면의 중앙에 오도록 조정된 상태)에서 비교출력 전압이 제4도의 전압(V0)이 되도록 조정하면, 두 입력(A,B)의 위상차에 의해 출력전압은 제4도의 전압(V0)을 기준으로 하여 V1 또는 V2 쪽으로 전압이 가감되어 수평발진회로의 위상을 조절한다.The reference phase adjustment of the phase comparison IC (IC2) is performed by adjusting the variable resistance (VR1) of the phase adjusting terminal of the horizontal oscillation IC (IC1) using the variable resistor VR2. If the comparison output voltage is adjusted to be the voltage V0 of FIG. 4 in the state of adjusting to be in the center of, the output voltage is based on the voltage V0 of FIG. 4 by the phase difference between the two inputs A and B. The voltage is applied to V1 or V2 to adjust the phase of the horizontal oscillator circuit.
이상에서와 같이 본 고안은 수평 편향회로의 발열에 의한 화면위치 이동이 보상되어 항상 일정한 화면 위치가 되도록 함으로써 장치의 신뢰도를 향상시킬 수 있는 유용한 고안인 것이다.As described above, the present invention is a useful design that can improve the reliability of the device by compensating the screen position movement caused by the heat of the horizontal deflection circuit to always be a constant screen position.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880019723U KR940007077Y1 (en) | 1988-11-30 | 1988-11-30 | Apparatus for compensating tv screen variation by temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880019723U KR940007077Y1 (en) | 1988-11-30 | 1988-11-30 | Apparatus for compensating tv screen variation by temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900011113U KR900011113U (en) | 1990-06-04 |
| KR940007077Y1 true KR940007077Y1 (en) | 1994-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880019723U Expired - Fee Related KR940007077Y1 (en) | 1988-11-30 | 1988-11-30 | Apparatus for compensating tv screen variation by temperature |
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| Country | Link |
|---|---|
| KR (1) | KR940007077Y1 (en) |
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1988
- 1988-11-30 KR KR2019880019723U patent/KR940007077Y1/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| KR900011113U (en) | 1990-06-04 |
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