KR940027513A - Aspect ratio change control circuit of optical screen - Google Patents

Aspect ratio change control circuit of optical screen Download PDF

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Publication number
KR940027513A
KR940027513A KR1019930007852A KR930007852A KR940027513A KR 940027513 A KR940027513 A KR 940027513A KR 1019930007852 A KR1019930007852 A KR 1019930007852A KR 930007852 A KR930007852 A KR 930007852A KR 940027513 A KR940027513 A KR 940027513A
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KR
South Korea
Prior art keywords
current
output
voltage
horizontal
aspect ratio
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Application number
KR1019930007852A
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Korean (ko)
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KR100248720B1 (en
Inventor
유은호
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이헌조
주식회사 금성사
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Priority to KR1019930007852A priority Critical patent/KR100248720B1/en
Publication of KR940027513A publication Critical patent/KR940027513A/en
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Publication of KR100248720B1 publication Critical patent/KR100248720B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • 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

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

Abstract

본 발명은 광스크린 디스플레이 장치에 있어서 종횡비 변경에 따라 화상이 변화되는 것을 방지하고자 함을 목적으로 한 광스크린의 종횡비 변경 제어회로에 관한 것으로서, 이러한 본 발명의 목적은 수평드라이브 수단으로 부터 출력된 전류와 편향전류를 비교하고 그 결과값으로 수평출력구동전류를 제어하는 수평출력구동전류 제어수단과, 외부로 부터 입력된 종횡비 변경신호에 따라 수평사이즈 제어신호를 버퍼링하여 출력하는 버퍼와, 상기 버퍼에서 출력된 신호를 적분하여 출력하는 적분수단과, 상기 적분수단에서 출력된 신호에 따라 B+전압을 공급하고 피이드백되는 전류값에 따라 B+전압을 보상하는 전압보상수단과, 상기 수평출력구동전류 제어수단에서 얻어진 전류에 따라 구동되어 전압보상수단에서 출력된 전류를 톱니파로 만들어 편향코일에 흘리는 수평출력수단과, 상기 적분수단에서 출력된 적분전압과 각기 달리 설정된 기준전압을 비교하고 그 결과값으로 편향코일로 흐르는 전류의 직선성을 보정하는 편향전류보정수단을 구비함으로써 달성된다.The present invention relates to an aspect ratio change control circuit of an optical screen for the purpose of preventing an image from being changed due to an aspect ratio change in an optical screen display device. An object of the present invention is to provide a current output from a horizontal drive means. And a horizontal output drive current control means for comparing the deflection current with and controlling the horizontal output drive current as a result value, and a buffer for buffering and outputting the horizontal size control signal according to an aspect ratio change signal input from the outside, An integrating means for integrating and outputting the output signal, a voltage compensating means for supplying a B + voltage in accordance with the signal output from the integrating means and compensating for a B + voltage according to the fed back current value, and the horizontal output driving current Driven according to the current obtained from the control means to make the sawtooth wave the current output from the voltage compensation means And a deflection current correcting means for comparing the integral voltage output from the integrating means with a reference voltage set differently and correcting the linearity of the current flowing into the deflection coil as a result. .

Description

광스크린의 종횡비변경 제어회로Aspect ratio change control circuit of optical screen

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제4도는 본 발명에 적용되는 광스크린의 종횡비 변경 제어회로도, 제5도는 제4도의 종횡비에 따른 편향코일의 전류상태도, 제6도는 제4도에 따른 화면상태도로서, (가)는 종횡비가 4:3일때 화면상태도이고, (나)는 종횡비가 16:9일때 화면상태도이다.4 is an aspect ratio control circuit diagram of an optical screen applied to the present invention, FIG. 5 is a current state diagram of a deflection coil according to the aspect ratio of FIG. 4, FIG. 6 is a screen state diagram according to FIG. 4, and (a) The screen state diagram is 4: 3 and (b) is the screen state diagram when the aspect ratio is 16: 9.

Claims (3)

수평드라이브수단으로 부터 출력된 전류와 편향전류를 비교하고 그 결과값으로 수평출력구동전류를 제어하는 수평출력구동전류 제어수단과, 외부로 부터 입력된 종횡비 변경신호에 따라 수평사이즈 제어신호를 버퍼링하여 출력하는 버퍼와, 상기 버퍼에서 출력된 신호를 적분하여 출력하는 적분수단과, 상기 적분수단에서 출력된 신호에 따라 B+전압을 공급하고 피이드백되는 전류값에 따라 B+전압을 보상하는 전압보상수단과, 상기 수평출력구동전류 제어수단에서 얻어진 전류에 따라 구동되어 전압보상수단에서 출력된 전류를 톱니파로 만들어 편향코일에 흘리는 수평출력수단과, 상기 적분수단에서 출력된 적분전압과 각기 달리 설정된 기준전압을 비교하고 그 결과값으로 편향코일로 흐르는 전류의 직선성을 보정하는 편향전류보정수단을 포함하여 된 것을 특징으로 한 광스크린의 종횡비 변경 제어회로.The horizontal output drive current control means for comparing the current output from the horizontal drive means with the deflection current and controlling the horizontal output drive current as a result value, and buffering the horizontal size control signal according to the aspect ratio change signal input from the outside. A buffer for outputting, an integrating means for integrating and outputting the signal output from the buffer, and a voltage compensation for supplying a B + voltage according to the signal output from the integrating means and compensating for the B + voltage according to the current value fed back. A horizontal output means which is driven according to the current obtained by the horizontal output drive current control means, and which the current output from the voltage compensating means is a sawtooth wave and flows to the deflection coil, and a reference set differently from the integral voltage output from the integrating means. Deflection current correction means for comparing the voltage and correcting the linearity of the current flowing into the deflection coil as a result value; Aspect ratio change control circuit of the optical screen, characterized in that the included. 제1항에 있어서, 수평출력구동전류 제어수단은 수평드라이브수단에서 출력된 전류를 검출하는 전류검출기와, 상기 전류검출기에서 출력된 전류와 편향전류를 비교하고 그 결과값을 출력하는 비교기와, 상기 비교기에서 출력된 전압을 수평드라이브수단에서 출력된 전류를 제어하는 적분기로 이루어짐을 특징으로 한 광스크린의 종횡비 변경 제어회로.According to claim 1, The horizontal output drive current control means is a current detector for detecting the current output from the horizontal drive means, a comparator for comparing the current output from the current detector and the deflection current and outputs the result, Aspect ratio change control circuit of an optical screen, characterized in that the voltage output from the comparator made of an integrator for controlling the current output from the horizontal drive means. 제1항에 있어서, 편향전류보정수단은 상기 적분수단에서 출력된 적분전압을 각기 달리 설정된 기준전압과 각각 비교하고 그 결과값을 출력하는 제1,제2비교기와, 상기 제1,제2비교기에서 출력되는 신호에 따라 스위칭되는 제1,제2스위치와, 상기 제1,제2스위치의 스위칭에 따라 편향코일에 흐르는 전류의 직선성을 보정하는 제1,제2코일 및 제1,제2콘덴서로 이루어짐을 특징으로 한 광스크린의 종횡비 변경 제어회로.The first and second comparators of claim 1, wherein the deflection current correcting means compares the integral voltages output from the integrating means with reference voltages differently set, and outputs the resultant values. First and second switches switched according to signals output from the first and second and second and first and second coils for correcting linearity of current flowing in the deflection coil according to the switching of the first and second switches. Aspect ratio change control circuit of an optical screen, characterized by consisting of a capacitor. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019930007852A 1993-05-07 1993-05-07 Aspect ratio control circuit of a wide screen KR100248720B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930007852A KR100248720B1 (en) 1993-05-07 1993-05-07 Aspect ratio control circuit of a wide screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930007852A KR100248720B1 (en) 1993-05-07 1993-05-07 Aspect ratio control circuit of a wide screen

Publications (2)

Publication Number Publication Date
KR940027513A true KR940027513A (en) 1994-12-10
KR100248720B1 KR100248720B1 (en) 2000-03-15

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Application Number Title Priority Date Filing Date
KR1019930007852A KR100248720B1 (en) 1993-05-07 1993-05-07 Aspect ratio control circuit of a wide screen

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