[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR970001133Y1 - Automatic screen controlling device of image displaying device - Google Patents

Automatic screen controlling device of image displaying device Download PDF

Info

Publication number
KR970001133Y1
KR970001133Y1 KR2019900016638U KR900016638U KR970001133Y1 KR 970001133 Y1 KR970001133 Y1 KR 970001133Y1 KR 2019900016638 U KR2019900016638 U KR 2019900016638U KR 900016638 U KR900016638 U KR 900016638U KR 970001133 Y1 KR970001133 Y1 KR 970001133Y1
Authority
KR
South Korea
Prior art keywords
signal
synchronous
output
detector
reproduced
Prior art date
Application number
KR2019900016638U
Other languages
Korean (ko)
Other versions
KR920008332U (en
Inventor
박승철
Original Assignee
엘지전자 주식호사
구자홍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식호사, 구자홍 filed Critical 엘지전자 주식호사
Priority to KR2019900016638U priority Critical patent/KR970001133Y1/en
Publication of KR920008332U publication Critical patent/KR920008332U/en
Application granted granted Critical
Publication of KR970001133Y1 publication Critical patent/KR970001133Y1/en

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/22Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음.No content.

Description

영상 표시장치의 화면 자동 조정 장치Screen automatic adjustment device of video display device

제1도는 종래의 픽쳐 컨트롤 회로도.1 is a conventional picture control circuit diagram.

제2도는 본 고안에 따른 영상 표시장치의 화면 자동 조정 장치의 블록도.2 is a block diagram of a screen automatic adjustment device of an image display device according to the present invention.

제3도는 본 고안에 따른 영상 표시장치의 화면 자동 조정 장치의 회로도.3 is a circuit diagram of a screen automatic adjustment device of an image display device according to the present invention.

제4도는 본 고안에 따른 각부 파형도.4 is a waveform diagram of each part according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

A : FM검파기 R : 동기분리기A: FM detector R: Synchronous separator

C : FM변조기 D : 동기RF검출부C: FM modulator D: Synchronous RF detector

E : 위상비교기1 F : 적분기1E: Phase comparator 1 F: Integrator 1

G : DC체배기 H : 적분기2G: DC multiplier H: Integrator 2

I : 비교기2 Q1-Q4 : 트랜지스터I: Comparator 2 Q1-Q4: Transistor

R1-R13 : 저항 VR : 가변저항R1-R13: Resistance VR: Variable resistor

C1-C3 : 콘덴서C1-C3: Capacitor

본 고안은 VCR의 픽쳐 콘트롤(Picture Control)에 관한 것으로, 특히 열화된 데이프 재생시 화질 감약현상을 막아주기 위한 화면 조정이 자동으로 이루어지도록 한 영상 표시장치의 화면 자동 조정 장치에 관한 것이다.The present invention relates to a picture control (VCR) of a VCR, and more particularly, to an automatic screen adjustment apparatus of a video display device that automatically adjusts a screen to prevent a quality deterioration phenomenon during deteriorated tape playback.

종래 화상표시장치의 경우는 제1도에서와 같이 열화된 화면이 디스플레이 될 경우 사용자가 화면을 보면서 장치 본체에 있는 조절 장치(회부볼륨)(VR)를 직접 조절하거나 리모콘을 이용한 조절 장치를 이용하여 명암, 콘트라스트, 샤프니스 등으 픽쳐 콘트롤 전압을 조절하면서 원하는 화면상태를 유지하였다.In the case of a conventional image display device, as shown in FIG. 1, when a deteriorated screen is displayed, the user directly adjusts an adjustment device (referred volume) VR in the main body of the device while viewing the screen or by using a control device using a remote controller. The picture control voltage was adjusted with contrast, contrast, and sharpness to maintain the desired display.

아니면 하드한 화면을 본 것인가에 따라 그때 그때 소비자가 외부볼륨(VR) 또는 리모콘을 통해 조절 할 수는 있으나, 사용자가 이를 직접 조정해야하는 번거로움이 있었다.Or, depending on whether you see a hard screen at that time, the consumer can adjust the external volume (VR) or remote control, but the user had to adjust it manually.

본 고안은 이러한 불편을 해결하기 위해 안출된 것으로서, 입력신호(재생신호)의 열화에 대응하여 밝기가 전체적으로 저하된 경우, 흑백 대비가 뚜렷하지 않게된 경우, 또는 윤곽이 잘 구분되지 않는 경우의 구분이 없이 신호 크기를 기준신호 크기에 비교하여 상기 조정 항목의 조정을 자동으로 할 수 있도록 한 영상 포시장치의 화면 자동 조정 장치를 제공하는데 그 목적이 있다.The present invention has been devised to solve such inconvenience, and when the brightness is generally reduced in response to the deterioration of the input signal (playback signal), when the black and white contrast is not clear or the contour is not well distinguished Accordingly, an object of the present invention is to provide an automatic screen adjusting apparatus for an image display apparatus which enables automatic adjustment of the adjustment item by comparing the signal size to the reference signal size.

이와같은 본 고안을 첨부된 도면을 참조하여 보다 상세히 설명하면 다음과 같다.This invention is described in more detail with reference to the accompanying drawings as follows.

먼저 제2도의 블록도를 참조하여 그 구성을 보면, 재생RF신호는 검파기(A)와 동기 RF검출부(D)로 인가되고 검파기(A)의 출력은 동기 분리기(B)를 통해 FM변조기(C)와 동기 RF검출부(D) 및 인버터(T1)를 통해 FM변조기(C)와 적분기(F)에 연결되고 동기RF검출부(D)의 출력과 FM변조기(C)의 출력은 위상비교기1(E)로 인가되고 위상비교기1(E)의 출력은 적분기1(F)로 인가되며 적분기1(F)의 출력은 가변저항(VR1)이 연결된 DC체배기(G)를 통해 비교기2(I)로 인가되고 비교기2(I)의 출력은 적분기2(H)를 통해 픽쳐 콘트롤 볼테이지로 출력된다.First, referring to the block diagram of FIG. 2, the reproduction RF signal is applied to the detector A and the synchronous RF detector D, and the output of the detector A is the FM modulator C through the synchronous separator B. ) And the synchronous RF detector (D) and inverter (T1) are connected to the FM modulator (C) and integrator (F), and the output of the synchronous RF detector (D) and the output of the FM modulator (C) are phase comparators 1 (E). ) And the output of phase comparator 1 (E) is applied to integrator 1 (F), and the output of integrator 1 (F) is applied to comparator 2 (I) through DC multiplier (G) to which variable resistor VR1 is connected. The output of comparator 2 (I) is output to picture control voltage through integrator 2 (H).

이의 동작상태를 제3도 회로도를 참조하여 설명하면, 최초 열화되어 있는 테이프로부터 재생된 RF파형(FM파형)은 FM검파되어 재생, 비디오 출력을 재생하게 된다.The operation state thereof will be described with reference to the circuit diagram of FIG. 3, and the RF waveform (FM waveform) reproduced from the tape deteriorated for the first time is FM-detected to reproduce and reproduce video output.

이 재생된 신호로부터 동기분리기(B)가 동기신호를 분리하고 이 동기신호를 콘트롤신호로 사용하여 FM변조기(C)에서 노이즈가 없는 상태의 FM신호를 만든다(이는 제3도 회로도에서 트랜지스터(Q3,Q4)를 통해 증폭하여 클램핑(Clamping)한 후 FM변조하므로서 노이즈가 없는 상태의 FM변조신호를 만든다.)From the reproduced signal, the synchronizing separator B separates the synchronizing signal and uses the synchronizing signal as a control signal to produce an FM signal in a noise-free state in the FM modulator C (this is the transistor Q3 in the circuit diagram of FIG. 3). Amplify through Q4) and clamp after clamping to create FM modulated signal with no noise.)

이 깨끗한 FM변조된 신호는 트랜지스터(Q1,Q2) 저항(R1-R4)으로 구성된 동기 RF검출부(D) 트랜지스터(Q2)의 에미터 출력단을 통해 검출된 신호측 동기신호(동기분리기(B)에서 분리된 동기신호)에 의해 특정부위 검출된 재생RF(즐 재생FM)신호와 위상비교기1(E)을 통해 위상비교하게 된다.This clean FM modulated signal is obtained from the signal-side synchronization signal (synchronous separator B) detected through the emitter output terminal of the synchronous RF detector (D) transistor Q2 composed of the transistors Q1 and Q2 resistors R1-R4. Phase comparison is performed through a phase comparator 1 (E) and a reproduction RF signal detected by a specific portion by a separate synchronization signal).

즉 테이프의 열화정도가 심하면 재생RF파형은 과다한 노이즈를 갖게 되고 이 과다한 노이즈의 영향에 의해서 강계로 만들어진 깨끗한 FM신호와 재생RF(FM)신호를 비교하는 위상비교기1(E)은 저항(R8) 콘덴서(C2)의 적분기1(F)을 통해 에러(error)전압을 출력하게 된다.In other words, if the tape deterioration is severe, the reproducing RF waveform has excessive noise, and the phase comparator 1 (E) comparing the clean FM signal made of a strong system with the reproducing RF (FM) signal by the influence of the excessive noise has a resistance (R8). The error voltage is output through the integrator 1 (F) of the capacitor C2.

이 출력된 신호(적분기1(F)을 통해 출력된 위상비교기1(E)의 출력신호)는 DC체배기(G)에 의해서 체배되고 이 체배된 신호는 비교기2(I)를 통해 저항(R9,R10)에 의한 기준전압과 비교되  비교기2(I)의 출력은 저항(R11) 콘덴서(C3)의 적분기2(H)에 의해서 적분된다.This output signal (output signal of phase comparator 1 (E) output through integrator 1 (F)) is multiplied by a DC multiplier (G), and this multiplied signal is obtained through a resistor (R9, The output of comparator 2 (I), which is compared with the reference voltage by R10), is integrated by integrator 2 (H) of resistor R11 and capacitor C3.

따라서 이 적분 출력전압은 저항(R12,R13) 다이오드(D1)의 바이어스(Bias) 회로에 의해서 일정전압 바이어스가 걸리게 된다.Therefore, this integrated output voltage is subjected to a constant voltage bias by the bias circuit of the resistors R12 and R13 diode D1.

이 최종전압은 픽쳐 콘트롤용 전압으로 이용되어 픽쳐의 질을 결정하게 된다.This final voltage is used as the picture control voltage to determine the picture quality.

이때의 각부파형은 제4도와 같다.At this time, the angle waveform is shown in FIG.

따라서 본 고안은 테이프의 열화된 정도에 의해서 픽쳐 콘트롤 전압이 제어되므로 테이프의 상태에 따라서 그때그때 일정한 상태의 화질을 볼 수 있는 효과가 있다.Therefore, since the picture control voltage is controlled by the degree of deterioration of the tape, the present invention has an effect of viewing a certain state of image quality at that time according to the state of the tape.

Claims (1)

테이프로부터 재생되는 FM변조신호를 입력하는 RF입력단과, 재생FM변조신호를 검파하는 검파부와, 상기 검파된 재생신호의 동기신호를 분리하여 증폭하고 일정 크기로 클램핑하여 출력하는 동기신호 분리부와, 상기 동기신호 분리부의 출력신호를 기준으로 상기 재생되는 FM변조신호를 분리하는 동기 RF검출부와, 상기 FM변조부의 출력신호를 기준으로 상기 동기 RF검출부의 출력신호를 비교하여 그 에러량을 출력하는 비교부와, 상기 비교부의 출력신호를 화면표시 제어 신호로 출력하는 화면 제어부를 포함하여 이루어짐을 특징으로 하는 영상 표시장치의 화면 자동 조정 장치.An RF input stage for inputting an FM modulated signal reproduced from a tape, a detector for detecting a reproduced FM modulated signal, a sync signal separator for separating and amplifying, clamping and outputting a synchronous signal of the detected reproduced signal; And comparing the output signal of the synchronous RF detector with the synchronous RF detector for separating the reproduced FM modulated signal based on the output signal of the synchronous signal separator, and outputting the error amount. And a screen controller for outputting a comparator and an output signal of the comparator as a screen display control signal.
KR2019900016638U 1990-10-31 1990-10-31 Automatic screen controlling device of image displaying device KR970001133Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019900016638U KR970001133Y1 (en) 1990-10-31 1990-10-31 Automatic screen controlling device of image displaying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019900016638U KR970001133Y1 (en) 1990-10-31 1990-10-31 Automatic screen controlling device of image displaying device

Publications (2)

Publication Number Publication Date
KR920008332U KR920008332U (en) 1992-05-20
KR970001133Y1 true KR970001133Y1 (en) 1997-02-18

Family

ID=19304848

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019900016638U KR970001133Y1 (en) 1990-10-31 1990-10-31 Automatic screen controlling device of image displaying device

Country Status (1)

Country Link
KR (1) KR970001133Y1 (en)

Also Published As

Publication number Publication date
KR920008332U (en) 1992-05-20

Similar Documents

Publication Publication Date Title
JPH06133238A (en) Broadcast viewing state automatic changeover device
KR970001133Y1 (en) Automatic screen controlling device of image displaying device
US4456927A (en) Video circuitry
US4424528A (en) Video circuit
JPH07154693A (en) Character display device and its character display method
US4604646A (en) Video processing circuit
US5438424A (en) Video signal processing apparatus with image quality adjustment
US5398114A (en) Circuit for compensating for the drop-out of a reproduced video signal
US5825222A (en) Horizontal synchronous circuits
JPS6074786A (en) Television receiver
JP2000078496A (en) Image quality adjuster
KR970004673Y1 (en) Color tone compensation circuit during recording and replaying
KR930004830Y1 (en) Sync-signal detecting control circuit
KR940006304Y1 (en) Noise preventing circuit of vcr
JP2516105B2 (en) Black level correction circuit
KR920002121Y1 (en) Video signal same period stabilizing circuit
JPH05199431A (en) Clamping circuit
JPH0748833B2 (en) Image synthesizer
KR920000292B1 (en) Tv receiver
KR200162111Y1 (en) Synchronous separate circuit
JPH04354480A (en) Brightness control circuit
KR970002992B1 (en) Luminance control apparatus of t.v.
KR970004922Y1 (en) Gate pulse self-control circuit for secam signal
JP2604440Y2 (en) Dropout compensation circuit for playback video signal
KR970005658B1 (en) Darkness control apparatus of vcr at the time of screen record

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20041231

Year of fee payment: 9

EXPY Expiration of term