KR950000824Y1 - Horizontal size stabilization circuit for monitor - Google Patents
Horizontal size stabilization circuit for monitor Download PDFInfo
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- KR950000824Y1 KR950000824Y1 KR92010961U KR920010961U KR950000824Y1 KR 950000824 Y1 KR950000824 Y1 KR 950000824Y1 KR 92010961 U KR92010961 U KR 92010961U KR 920010961 U KR920010961 U KR 920010961U KR 950000824 Y1 KR950000824 Y1 KR 950000824Y1
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- monitor
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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
- H04N3/185—Maintaining dc voltage constant
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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
- H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
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- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래 모니터의 수평사이즈 조정회로도.1 is a horizontal size adjustment circuit diagram of a conventional monitor.
제2도는 제1도에 있어서, 이득조정에 따른 출력의 파형도.2 is a waveform diagram of an output according to the gain adjustment in FIG.
제3도는 본 고안 모니터의 수평사이즈 안정회로로도.3 is a horizontal size stability circuit of the present invention monitor.
제4도는 제3도에 있어서, 각부의 신호파형도.4 is a signal waveform diagram of each part in FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1,11 : 신호증폭부 2,12 : 커플링회로1,11: signal amplifier 2,12: coupling circuit
3,13 : 수평사이즈조정부 4,14 : 가변이득증폭부3,13: horizontal size adjustment part 4,14: variable gain amplifier part
15 : 클램프회로 15-1 : 최대치스위칭부15: Clamp Circuit 15-1: Maximum Switching Part
15-2 : 정전압부 OP1,OP2,OP11,OP12: 연산증폭기15-2: Constant voltage part OP 1 , OP 2 , OP 11 , OP 12 : Operational amplifier
D1,D2: 다이오드 C1,C11-C13: 콘덴서D 1 , D 2 : Diode C 1 , C 11 -C 13 : Condenser
R1-R7,R11-R19: 저항R 1 -R 7 , R 11 -R 19 : resistance
본 고안을 모니터의 수평사이즈 안정화에 관한 것으로, 특히 화면의 왜곡을 보정하기 위하여 핀쿠션 게인을 조정하면 수평사이즈도 함께 변화하는 것을 방지하는 모니터의 수평사이즈 안정화회로에 관한 것이다.The present invention relates to the horizontal size stabilization of the monitor, and more particularly to the horizontal size stabilization circuit of the monitor to prevent the horizontal size is also changed when the pincushion gain is adjusted to correct the distortion of the screen.
제1도는 종래 모니터의 수평사이즈 조정회로도로서 이에 도시한 바와같이, 이득조정에 따라 포물선파형의 신호를 증폭하는 신호증폭부(1)와, 이 신호증폭부(1)의 출력을 커플링하는 커플링회로(2)와, 직류전압을 변화시켜 출력하는 수평사이즈조정부(3)와, 이 수평사이즈조정부(3)의 출력(Vd)과 커플링회로(2)의 출력(Vc)을 증첩하여 오프셋 전압을 조정하는 가변이득증폭부(4)로 구성된 것으로, 상기 신호증폭부(1)는 입력신호(Vi)가 저항(R1)을 통해 비반전단자(+)에 접속된 연산증폭기(OP1)의 출력을 저항(R3)을 통해 접지저항(R2)이 접속된 반전단자(-)에 접속하여 구성되고, 상기 커플링회로(2)는 콘덴서(C1)와 접지저항(R4)로 구성하며, 상기 가변이득증폭부(4)는 커플링회로(2)의 출력이 저항(R5)을 통해 비반전단자(+)에 접속된 연산증폭기(OP2)의 출력(Vo)을 저항(R7)을 통해 반전단자(-)에 접속함과 아울러 그 반전단자(-)에 수평사이즈조정부(3)의 출력을 저항(R6)을 통해 접속하여 구성한다.1 is a horizontal size adjustment circuit diagram of a conventional monitor, as shown therein, a couple of coupling a signal amplifier 1 for amplifying a parabolic waveform signal in accordance with gain adjustment and an output of the signal amplifier 1; The ring circuit 2, the horizontal size adjusting section 3 for varying the DC voltage and outputting them, the output Vd of the horizontal size adjusting section 3, and the output Vc of the coupling circuit 2 are folded and offset. It consists of a variable gain amplifier (4) for adjusting the voltage, the signal amplifier (1) is an operational amplifier (OP 1 ) in which the input signal (Vi) is connected to the non-inverting terminal (+) through a resistor (R 1 ) ) Is connected to the inverting terminal (-) to which the ground resistor (R 2 ) is connected through the resistor (R 3 ), and the coupling circuit (2) comprises a capacitor (C 1 ) and a ground resistor (R 4). The variable gain amplifier 4 comprises an output Vo of the operational amplifier OP 2 having the output of the coupling circuit 2 connected to the non-inverting terminal + through a resistor R 5 . Is connected to the inverting terminal (-) through the resistor (R 7 ) and the output of the horizontal size adjusting unit (3) is connected to the inverting terminal (-) through the resistor (R 6 ).
상기 저항(R3)은 가변저항으로 핀쿠션이득을 조정하기 위한 것이다.The resistor R 3 is for adjusting the pincushion gain with a variable resistor.
이와같은 종래회로의 동작과정을 제2도 이득조정에 따른 출력신호의 파형도을 참조하여 설명하면 다음과 같다.The operation of the conventional circuit will be described with reference to the waveform diagram of the output signal according to the second degree gain adjustment as follows.
먼저, 포물선 파형의 신호(Vi)가 저항(R1)을 통해 신호증폭부(1)의 연산증폭기(OP1)에 입력하면 가변저항인 저항(R3)로 핀쿠션이득을 조정하고, 그 이득조정된 신호는 상기 연산증폭기(OP1)에서 증폭되어 커플링회로(2)에 출력한다.First, when the signal Vi of the parabolic waveform is input to the operational amplifier OP 1 of the signal amplifier 1 through the resistor R 1 , the pincushion gain is adjusted by the resistor R 3 , which is a variable resistor, and the gain thereof. The adjusted signal is amplified by the operational amplifier OP 1 and output to the coupling circuit 2.
이때, 커플링회로(2)는 콘덴서(C1)를 통해 신호증폭부(1)의 출력을 커플링하여 제2도에 도시한 바와같은 신호(Vc)를 가변이득증폭부(4)에 출력하고, 수평사이즈 조정부(3)는 직류전압을 가변시켜 상기 가변이득조정부(4)에 출력한다.At this time, the coupling circuit 2 couples the output of the signal amplifier 1 through the capacitor C 1 and outputs the signal Vc as shown in FIG. 2 to the variable gain amplifier 4. The horizontal size adjusting section 3 varies the DC voltage and outputs it to the variable gain adjusting section 4.
따라서, 커플링회로(2)와 수평사이즈조정부(3)의 출력이 입력한 가변이득증폭부(4)의 연산증폭기(OP2)는 상기 커플링회로(2)의 포물선 파형의 신호(Vc)와 수평사이즈조정부(3)의 직류전압(Vd)을 중첩하고 오프셋 조정하여 출력한다.Therefore, the operational amplifier OP 2 of the variable gain amplifier 4 inputted by the output of the coupling circuit 2 and the horizontal size adjusting unit 3 is a parabolic waveform signal Vc of the coupling circuit 2. And the DC voltage Vd of the horizontal size adjusting section 3 are superimposed and offset-adjusted and output.
그러나, 이와같은 종래회로는 신호증폭부(1)의 저항(R3)으로 된 쿠션이득을 조정함에 따라 커플링회로(2)에서 교류적으로 제로전위가 되면서 제2도에 도시한 바와같이 전압(V1)(V2)의 변화가 발생하여 전체 수평사이즈도 변화하게 된다.However, such a conventional circuit adjusts the cushion gain of the resistance R 3 of the signal amplifying part 1 to zero voltage in an alternating manner in the coupling circuit 2, as shown in FIG. The change in (V 1 ) (V 2 ) occurs and the overall horizontal size also changes.
따라서, 모니터 생산라인등에서 화면의 왜곡을 보정하기 위해 핀쿠션이득을 조정하면 수평사이즈도 함께 변화되어 화면조정이 어려울뿐아니라 파형의 상,하가 함께 움직여서 화면이 불안정한 상태가 되는 문제점이 있었다.Therefore, when the pincushion gain is adjusted to correct the distortion of the screen in the monitor production line, the horizontal size is also changed, which makes it difficult to adjust the screen as well as causing the screen to be unstable because the top and bottom of the waveform move together.
본 고안은 이러한 문제점을 감안하여 핀쿠션이득이 조정된 포물선 파형의 신호를 수직블랭킹 기간동안 임의의 제어전압으로 클램프시킴으로써 포물선 파형의 시작전위를 일정하게 유지하여 수평 사이즈를 안정시키는 모니터의 수평사이즈 안정화회로를 안출한 것으로, 이를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.In view of these problems, the present invention clamps a parabolic waveform whose pincushion gain is adjusted to an arbitrary control voltage during the vertical blanking period, thereby maintaining a constant horizontal potential of the parabolic waveform to stabilize the horizontal size. The invention is described in detail with reference to the accompanying drawings as follows.
제3도는 본 고안 모니터의 수평사이즈 안정회로도로서 이에 도시한 바와같이, 포물선 파형의 신호(Vi)를 이득을 조정하여 증폭하는 신호증폭부(11)와, 이 신호증폭부(11)의 출력을 커플링하는 커플링회로(12)와 수직펄스(Vp)에 따라 스위칭도어 상기 커플링회로(12)의 최대치 출력을 일정전위로 고정하는 클램프회로(15)와, 직류전압을 가변시켜 출력하는 수평사이즈조정부(13)와, 이 수평사이즈조정부(13)의 직류전압(Vd)과 상기 클램핑된 커플링회로(12)의 출력(Vc)을 입력받아 직류오프셋 전압을 조정하고 증폭하는 가변이득 증폭부(14)로 구성한 것으로, 상기 클램프회로(15)는 트랜지스터(Q1), 다이오드(D1) 및 저항(R17,R18)로 구성하여 상기 커플링회로(12)의 출력을 수직펄스(Vp)에 따라 스위칭하는 최대치스위칭부(15-1)와, 저항(R19), 콘덴서(C13) 및 다이오드(D2)로 구성하여 이 최대치스위칭부(15-1)의 출력을 일정전위로 유지하는 정전압부(15-2)로 구성한다.3 is a horizontal size stable circuit diagram of the monitor according to the present invention. As shown therein, a signal amplification unit 11 for amplifying the signal Vi of a parabolic waveform by adjusting the gain and the output of the signal amplification unit 11 are shown. A switching circuit for clamping the maximum output of the coupling circuit 12 at a constant potential according to the coupling circuit 12 and the vertical pulse Vp for coupling, and a horizontal output for varying the DC voltage. A variable gain amplifier which receives the size adjusting unit 13 and the DC voltage Vd of the horizontal size adjusting unit 13 and the output Vc of the clamped coupling circuit 12 to adjust and amplify the DC offset voltage. 14, the clamp circuit 15 is composed of a transistor Q 1 , a diode D 1 , and a resistor R 17 , R 18 so that the output of the coupling circuit 12 is vertically pulsed. Maximum switching unit 15-1 for switching according to Vp), resistor R 19 , capacitor C 13 and diode ( D 2 ), and constitutes a constant voltage section 15-2 that maintains the output of the maximum switching unit 15-1 at a constant potential.
상기 다이오드(D2)는 제너다이오드이고, 상기 콘덴서(C1),(C2)는 전해콘덴서이다.The diode D 2 is a zener diode, and the capacitors C 1 and C 2 are electrolytic capacitors.
미설명된 콘덴서(C2)는 직류오프셋 전압을 조정하기 위한 것이다.The unexplained capacitor C 2 is for adjusting the DC offset voltage.
이와같이 구성한 본 고안 모니터의 수평사이즈 안정화회로의 작용 및 효과를 제2도 각부의 신호파형도를 참조하여 상세히 설명하면 다음과 같다.The operation and effects of the horizontal size stabilization circuit of the monitor according to the present invention configured as described above will be described in detail with reference to the signal waveforms of the second part.
먼저, 제4도 (a)에 도시한 바와같은 포물선 파형의 입력신호(Vi)가 신호증폭부(11)에 입력하여 저항(R11)을 통해 연산증폭기(OP11)의 비반전단자(+)로 입력하면 가변저항이 저항(R3)의 조정으로 핀쿠션이득을 조정하고, 그 조정된 신호를 상기 연산증폭기(OP11)에서 증폭하여 커플링회로(12)의 콘덴서(C11)에서 커플링하여 클램프회로(15) 및 가변이득증폭부(14)에 출력한다.First, an input signal Vi of a parabolic waveform as shown in FIG. 4 (a) is input to the signal amplifier 11 and the non-inverting terminal of the operational amplifier OP 11 through the resistor R 11 (+). ), The variable resistor adjusts the pincushion gain by adjusting the resistor R 3 , and amplifies the adjusted signal in the operational amplifier OP 11 to couple the capacitor C 11 of the coupling circuit 12. The ring is output to the clamp circuit 15 and the variable gain amplifier 14.
이때, 클램프회로(15)는 제4도에 도시한 바와같이 수직블랭킹 기간동안 발생한 수직펄스(Vp)가 입력할때마다 최대치스위칭부(15-1)의 트랜지스터(Q1)가 턴온하고, 커플링회로(12)의 출력을 상기 트랜지스터(Q1)의 에미터전위 즉, 전압(B+)이 입력한 정전압부(15)의 제너다이오드(D2)의 정전압특성에 의한 전압으로 수직펄스(Vp)가 입력한 수직블랭킹 기간동안 클램프하여 상기 커플링회로(12)는 제4도 (c)에 도시한 바와같이 포물선 파형의 최대치 부근이 일정레벨로 고정되어 출력한다.At this time, the clamp circuit 15 turns on the transistor Q 1 of the maximum switching unit 15-1 whenever the vertical pulse Vp generated during the vertical blanking period is input as shown in FIG. The output of the ring circuit 12 is a vertical pulse (V) due to the constant voltage characteristic of the zener diode D 2 of the constant voltage unit 15 inputted by the emitter potential of the transistor Q 1 , that is, the voltage B + . During the vertical blanking period input by Vp), the coupling circuit 12 outputs a fixed level near the maximum value of the parabolic waveform as shown in FIG.
또한, 수평사이즈조정부(13)는 핀큐션이득이 조정됨에 따라 직류 전압을 가변하여 가변이득증폭부(14)에 출력한다.In addition, the horizontal size adjusting unit 13 outputs the DC voltage to the variable gain amplifier 14 as the pincushion gain is adjusted.
따라서, 가변이득증폭부(14)의 연산증폭기(OP12)의 비반전단자(+)에 제4도 (c)에 도시한 바와같은 클램핑된 커플링회로(12)의 출력(Vc)이 저항(R14)을 통해 입력하고 수평사이즈조정부(13)의 직류 출력(Vd)이 저항(R15)을 통해 입력하면 상기 연산증폭기(OP12)는 콘덴서(C2)를 통해 직류오프셋 전압이 조정된 신호를 증폭하여 제4도 (d)에 도시한 바와같이 포물선 파형의 출발점을 일정전위로 유지하는 신호(Vo)를 출력한다.Accordingly, the output Vc of the clamped coupling circuit 12 as shown in FIG. 4 (c) is resistance to the non-inverting terminal (+) of the operational amplifier OP 12 of the variable gain amplifier 14. Input through (R 14 ) and the DC output (Vd) of the horizontal size adjusting unit 13 is input through the resistor (R 15 ) the operational amplifier (OP 12 ) the DC offset voltage is adjusted through the capacitor (C 2 ) The amplified signal is amplified to output a signal Vo that maintains the starting point of the parabolic waveform at a constant potential as shown in FIG.
이상에서 상세히 설명한 바와같이 본 고안 모니터의 수평사이즈 안정화회로는 핀쿠션 게인을 조정한 후 수직 블랭킹 기간동안 클램프회로로 포물선 파형의 출발점을 일정전위로 유지시킴으로써 핀쿠션 게인만이 변화하여 안정된 화면을 안정화시키는 효과가 있다.As described in detail above, the horizontal size stabilization circuit of the present invention has the effect of stabilizing a stable screen by changing the pincushion gain only by adjusting the pincushion gain and maintaining the starting point of the parabolic waveform at a constant potential during the vertical blanking period. There is.
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KR92010961U KR950000824Y1 (en) | 1992-06-18 | 1992-06-18 | Horizontal size stabilization circuit for monitor |
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KR92010961U KR950000824Y1 (en) | 1992-06-18 | 1992-06-18 | Horizontal size stabilization circuit for monitor |
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KR940002220U KR940002220U (en) | 1994-01-03 |
KR950000824Y1 true KR950000824Y1 (en) | 1995-02-13 |
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1992
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