KR970019372A - APARATUS FOR CLAMPING THE LEVEL OF NOISE IN PLASMA DISPLAY PANNEL TELEVISION - Google Patents

APARATUS FOR CLAMPING THE LEVEL OF NOISE IN PLASMA DISPLAY PANNEL TELEVISION Download PDF

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Publication number
KR970019372A
KR970019372A KR1019950033564A KR19950033564A KR970019372A KR 970019372 A KR970019372 A KR 970019372A KR 1019950033564 A KR1019950033564 A KR 1019950033564A KR 19950033564 A KR19950033564 A KR 19950033564A KR 970019372 A KR970019372 A KR 970019372A
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South Korea
Prior art keywords
signal
level
voltage
clamp
clamping
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KR1019950033564A
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Korean (ko)
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KR0154938B1 (en
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박준석
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배순훈
대우전자 주식회사
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Priority to KR1019950033564A priority Critical patent/KR0154938B1/en
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Picture Signal Circuits (AREA)

Abstract

본 발명은 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치에 관한 것으로 무신호인 경우, 유무신호 판별부로부터의 로우레벨신호에 의거하여 트랜지스터(TR)가 턴오프되고, Vcc의 전압이 저항(R2,R3)에 의해 소정전압레벨(2V)로 전압분배되고, 클램프부로부터 출력되는 전압레벨이 소정전압레벨(2V)로 클램프되어 출력되므로써 무신호인 경우에도 무신호가 양자화되어 PDP TV 화면상으로 디스플레이되므로, 시청자가 무신호 채널을 판별할 수 있도록 한 것이다.The present invention relates to a no-signal level clamp device in a PDP TV, and in the case of no signal, the transistor TR is turned off based on the low level signal from the presence / absence signal discrimination unit, and the voltage of Vcc The voltage is divided by the R2 and R3 to the predetermined voltage level (2V), and the voltage level output from the clamp unit is clamped and output to the predetermined voltage level (2V) so that no signal is quantized and displayed on the PDP TV screen even when there is no signal. Therefore, the viewer can determine the non-signal channel.

Description

피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치(APPARATUS FOR CLAMPING THE LEVEL OF NOISE IN PLASMA DISPLAY PANNEL TELEVISION)APARATUS FOR CLAMPING THE LEVEL OF NOISE IN PLASMA DISPLAY PANNEL TELEVISION

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

제1도는 본 발명의 바람직한 실시예에 따른 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치의 개략적인 블록구성도,1 is a schematic block diagram of a signal-free level clamp device in a PDP TV according to a preferred embodiment of the present invention;

제2도는 본 발명에 따라 무신호 레벨이 클램프된 경우를 도시한 도면,2 is a diagram illustrating a case where a signal-free level is clamped according to the present invention;

제3도는 무신호 레벨이 클램프되지 않은 경우를 도시한 도면.3 shows a case where no signal level is clamped.

Claims (6)

크로마IC로부터의 출력영상을 클램프하는 피디피 티브이(PDP TV)장치에 있어서 상기 PDP TV의 파워가 온된 상태에서 복합영상신호의 존재유무를 판별하기 위한 판별수단(110,120); 상기 크로마IC로부터의 출력영상을 설정된 소정레벨로 클램프하기 위한 클램프수단(130); 상기 판별수단으로부터 무신호 판별신호에의거하여 소정전압을 상기 클램프수단의 출력단으로 제공하므로써 상기 클램프수단(130)으로부터의 출력레벨을 상기 무신호의 레벨을 상기 소정레벨로 클램프하는 전압제공수단(TR,R2,R3,D)으로 이루어진 것을 특징으로 하는 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치.A PDP TV apparatus for clamping an output image from a chroma IC, comprising: discriminating means (110,120) for determining the presence or absence of a composite video signal in a state where the power of the PDP TV is turned on; Clamp means (130) for clamping the output image from the chroma IC to a predetermined level; The voltage providing means (TR) for clamping the output level from the clamp means (130) to the predetermined level by providing a predetermined voltage to the output terminal of the clamp means based on the non-signal discriminating signal from the discriminating means (TR). , R2, R3, D) Signal level clamp device in the PDTV (PDP TV) characterized in that consisting of. 제1항에 있어서 상기 판별수단은; 복합영상신호 중에 포함되어 있는 수평동기신호와 수직동기신호를 분리하기 위한 싱크분리수단; 상기 싱크분리수단에서 분리된 상기 수평동기신호와 수직동기신호를 이용하여 상기 영상신호의 유무신호를 판별하기 위한 유무신호 판별수단으로 이루어진 것을 특징으로 아는 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치.The apparatus of claim 1, wherein the discriminating means comprises: Sync separating means for separating the horizontal synchronizing signal and the vertical synchronizing signal included in the composite video signal; No signal level clamp in PDTV, characterized in that the presence or absence signal discrimination means for discriminating the presence or absence of the video signal using the horizontal synchronization signal and the vertical synchronization signal separated from the sink separation means. Device. 제2항에 있어서 상기 전압제공 수단은; 상기 유무신호 판별수단으로부터의 판별신호에 의거하여 상기 클램프수단의 출력단으로의 상기 소정전압제공을 스위칭하기 위한 스위칭수단; 상기 소정전압을 설정된 소정전압 레벨로 전압 분배하기 위한 전압분배수단; 상기 전압분배수단에서 분배된 전압에 의거하여 절환하는 절환수단으로 이루어진 것을 특징으로 하는 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치.3. The apparatus of claim 2, wherein said voltage providing means; Switching means for switching the provision of the predetermined voltage to an output end of the clamp means based on the discrimination signal from the presence / absence signal discrimination means; Voltage distribution means for voltage-dividing the predetermined voltage to a predetermined predetermined voltage level; And a switching means for switching on the basis of the voltage divided by the voltage dividing means. 제3항에 있어서 상기 스위칭수단은 트랜지스터인 것을 특징으로 하는 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치.4. The signal-free level clamp device of PDTV according to claim 3, wherein said switching means is a transistor. 제3항에 있어서 상기 전압분배수단은 저항인 것을 특징으로 하는 피디피 티브이(PDP TV)에서의 무신호 레벨 클램프장치.4. The signal-free level clamping device of PDTV according to claim 3, wherein said voltage dividing means is a resistor. 제3항에 있어서 상기 절환수단은 다이오드인 것을 특징으로 하는 피디피 티브이(PDP TV)에서이 무신호 레벨 클램프장치.4. The signal-free level clamping device of PDTV according to claim 3, wherein said switching means is a diode. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950033564A 1995-09-30 1995-09-30 No-signal level clamp apparatus of pdp tv KR0154938B1 (en)

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Application Number Priority Date Filing Date Title
KR1019950033564A KR0154938B1 (en) 1995-09-30 1995-09-30 No-signal level clamp apparatus of pdp tv

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KR970019372A true KR970019372A (en) 1997-04-30
KR0154938B1 KR0154938B1 (en) 1998-11-16

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