KR880004484Y1 - Television for two-input mode - Google Patents

Television for two-input mode Download PDF

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KR880004484Y1
KR880004484Y1 KR2019850005913U KR850005913U KR880004484Y1 KR 880004484 Y1 KR880004484 Y1 KR 880004484Y1 KR 2019850005913 U KR2019850005913 U KR 2019850005913U KR 850005913 U KR850005913 U KR 850005913U KR 880004484 Y1 KR880004484 Y1 KR 880004484Y1
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switching
television
mode
contact
diode
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KR2019850005913U
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KR860015534U (en
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윤경하
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삼성전자주식회사
정재은
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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
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/05—Mode selector switch, e.g. shift, or indicator

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

내용 없음.No content.

Description

2입력모드용 테레비젼의 혼선제거회로Crosstalk elimination circuit of TV for 2 input mode

첨부도면은 본 고안의 실시회로도.The accompanying drawings are embodiments of the present invention.

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

C : 콘덴서 R : 저항C: capacitor R: resistance

D : 다이오드 ZD : 제너다이오드D: Diode ZD: Zener Diode

SW : 모드전환스위치 2 : 스위칭 ICSW: Mode selector switch 2: Switching IC

본 고안은 텔레비젼/위부비디오신호의2입력모드용 텔레비젼에 있어서, 텔레비젼신호와 외부비디오 입력신호간의 상호간섭(CROSSTALK)현상에 의한 혼선을 제거시키도록 한 혼선 제거회로에 대한 것이다.The present invention is directed to a crosstalk removal circuit for eliminating crosstalk due to crosstalk between a television signal and an external video input signal in a television for a two input mode of a television / upper video signal.

종래의 2입력모드용 텔레비젼은 자체의 텔레비젼신호와 외부비디오신호를 모드스위칭 IC로 인가시키고, 이 스위칭IC의 스위칭 기능에 의해 어느 한쪽의 신호를 선택하도록 되어 있는데, 텔레비젼 모우드시 스위칭IC로 인가되는 외부비디오 신호로 인해 텔레비젼 복합영상신호에 상호 간섭현상에 의한 혼선이 발생하여 화면에 나쁜 영향을 주는 단점이 있었다.Conventional televisions for two input mode apply their own television signals and external video signals to the mode switching IC, and select one of the signals by the switching function of the switching IC. The external video signal has a disadvantage of adversely affecting the screen due to the interference caused by the mutual interference phenomenon on the TV composite video signal.

본 고안의 목적은 이와같은 단점을 해결하기 위하여 자체 텔레비젼수신모드시 스위칭IC로 인가되는 외부 비디오 신호를 자동적으로 접지로 바이패스시킴으로서 이 스위칭 IC의 각 입출력단자사이에서 발생하는 텔레비젼 및 외부비디오 신호간의 혼선을 제거시킬 수 있는 2입력모드용 텔레비젼의 혼선 제거회로를 제공하기 위한 것으로서, 이하 첨부도면에 의해 본고안의 구성 및 작용효과를 상세히 설명한다.The purpose of the present invention is to solve the above disadvantages by automatically bypassing the external video signal applied to the switching IC to the ground in its own TV receiving mode. The present invention provides a crosstalk removing circuit of a television for a two-input mode that can eliminate crosstalk. Hereinafter, the structure and effect of the present invention will be described in detail with reference to the accompanying drawings.

텔레비젼신호 스위칭접점(y)및 외부비디오신호 스위칭 접점(y')을 통해 인가된 텔레비젼신호 및 외부 비디오신호를 스위칭하는 스위칭IC(2), 이 스위칭 IC(2)의 각 스위칭 제어단자(x)(x')로 B+전압을 선택적으로 인가시키는 모드전환스위치(SW), 그리고 이 모드전환스위치(SW)의 텔레비젼 모드접점(a)을 통해 B+구동전원을 공급받는 텔레비젼 신호 드라이브회로(5) 를 포함하는 2입력모드용 텔레비젼에 있어서 상기의 모드전환스위치(SW)의 텔레비젼모드접점(a)에 저항(R)을 연결하고, 이 저항(R)의 타단을 결합콘덴서(C)를 통해 상기의 스위칭IC(2)의 외부 비디오신호 스위칭접점(y')에 연결하는 한편, 다이오드(D) 및 제너다이오드(ZD)를 통해 접지에 연결하여, 텔레비젼 모드시 상기의 모드전환스위치(SW)의 텔레비젼모드접점(a)에 저항(R)을 연결하고, 이 저항 (R)의 타단을 결합콘덴서(C)를 통해 상기의 스위칭IC(2)의 외부 비디오신호 스위칭접점(y')에 연결하는 한편, 다이오드(D) 및 제너다이오드(ZD)를 통해 접지에 연결하여, 텔레비젼 모드시 상기의 모드전환스위치(SW)를 통해 입력되는 B' 전원에 의해 상기의 다이오드(D) 및 제너다이오드(ZD) 를 도통시켜 상기의 스위칭IC(2)로 인가되는 외부비디오신호를 상기의 결합콘덴서(C), 다이오드(D) 및 제너다이오드(ZD)를 통해 접지로 바이패스시키도록 구성한다.A switching IC 2 for switching the television signal and the external video signal applied through the television signal switching contact y and the external video signal switching contact y ', and each switching control terminal x of the switching IC 2; a mode switch (SW) for selectively applying B + voltage to (x '), and a television signal drive circuit (5) supplied with B + drive power through the television mode contact (a) of the mode switch (SW) ; In a two-input mode television comprising: a resistor (R) connected to the television mode contact (a) of the above mode switching switch (SW), and the other end of the resistor (R) through a coupling capacitor (C). While connected to the external video signal switching contact (y ') of the switching IC (2), and connected to the ground through the diode (D) and zener diode (ZD), the mode switching switch (SW) in the television mode Connect a resistor (R) to the television mode contact (a) of the The stage is connected to the external video signal switching contact y 'of the switching IC 2 through the coupling capacitor C, while connected to the ground through the diode D and the zener diode ZD, and in a television mode. When the diode (D) and the zener diode (ZD) are conducted by the B 'power input through the mode switching switch (SW), the external video signal applied to the switching IC (2) is combined. It is configured to bypass to ground through a capacitor (C), a diode (D) and a zener diode (ZD).

미설명 부호중 1은 텔레비젼신호 입력단자, 3은 정전압회로, 8은 신호매칭회로, 6은 수평 및 수직편향회로, 7은 브라운관, 9는 복합영상신호 출력단자. Q1-Q6는 트랜지터, Z,Z'는 스위칭 IC의 스위칭접점, b는 모드전환스위치(SW)의 외부비디오모드 접점이다.1 is a television signal input terminal, 3 is a constant voltage circuit, 8 is a signal matching circuit, 6 is horizontal and vertical deflection circuit, 7 is a CRT, 9 is a composite video signal output terminal. Q 1 to Q 6 are the transistors, Z and Z 'are the switching contacts of the switching IC, and b is the external video mode contact of the mode switching switch (SW).

상기와 같은 구성인 본 고안에 잇어서, 텔레비젼신호를 수신하기 위한 텔레비젼 모드시 모드 전환스위치(SW)를 텔레비젼모드 접점(a)측에 절환시키게 되는데 이때 정전압회로(3)에서 출력되는 B+전원이 모드전환스위치(SW)의 텔레비젼 모드접점(a)을 통해 텔레비젼신호 드라이브회로(5)와 스위칭IC(2)의 스위칭제어단자(x)로 공급된다. 따라서, 스위칭 IC(2)의 텔레비젼신호스위칭접점(y)이 스위칭접점(z) 에 접속되고, 이에 의해 단자(1)에 인가된 텔레비젼신호가 상기의 텔레비젼신호 드라이브회로(5)에 의해 구동된 후 스위칭 IC(2)의 접속상태의 스위칭접점(y)(z)을 통해 신호 매칭회로(8)로 공급되어, 처리됨으로서 브라운관(7)에서는 텔레비젼신호가 디스플레이 된다.According to the present invention having the above-described configuration, the mode changeover switch SW for receiving a television signal is switched to the television mode contact point a, where B + power output from the constant voltage circuit 3 It is supplied to the television signal drive circuit 5 and the switching control terminal x of the switching IC 2 through the television mode contact a of the mode switching switch SW. Thus, the television signal switching contact y of the switching IC 2 is connected to the switching contact z, whereby the television signal applied to the terminal 1 is driven by the television signal drive circuit 5 described above. Thereafter, the signal is supplied to the signal matching circuit 8 through the switching contact y (z) in the connected state of the switching IC 2 and processed, so that the television signal is displayed in the CRT 7.

한편, 스위칭 IC(2)의 외부비디오신호 스위칭접점(y')은 그 스위칭제어단자(x')로 B+전압이 공급되지 않기 때문에 스위칭 접점(z')으로 부터 개방사태로 됨으로서 단자(4)를 통해 입력된 외부비디오신호는 이 스위칭IC(2)에 의해 차단된 상태에 있게 된다.On the other hand, since the external video signal switching contact y 'of the switching IC 2 is open from the switching contact z' because the B + voltage is not supplied to the switching control terminal x ', the terminal 4 is open. The external video signal inputted through C1) is in the state of being blocked by this switching IC 2.

이때, 전술한 바의 모드순환스위치(SW)의 텔레비젼모드 접점(a)을 통해 인가된 B+전원이 본 고안내의 저항(R)을 통한 후 다이오드(D) 및 제너다이오드(ZD)를 차례로 도통시키게 되고, 이에 따라 단자(4)로 부터 스위칭IC(2)로 인가되는 외부비디오신호가 결합콘덴서(C)와 도통상태의 다이오드(D), 및 제너다이오드(ZD)를 통해 접지로 바이패스됨으로서 스위칭IC(2)의 스위칭접점(y)(z)을 통해 입출력된는 텔레비젼신호에 아무런 영향을 주지않게 되어 각 신호간의 혼선이 발생하지 않는다.At this time, B + power applied through the television mode contact (a) of the mode cyclic switch (SW) as described above through the resistor (R) of the high guide, and then in turn the diode (D) and the zener diode (ZD) Therefore, the external video signal applied from the terminal 4 to the switching IC 2 is bypassed to the ground through the coupling capacitor C, the diode D in the conductive state, and the zener diode ZD. As a result, input / output through the switching contact y (z) of the switching IC 2 has no influence on the television signal, and no crosstalk between the signals occurs.

한편, 외부비디오신호를 수신하기 위한 외부비디오 신호 모드시에 있어서는 모드전환스위치(SW)를 외부비디오모드 접점(b)측에 절환시키게되며,이에 의해 모드전환스위치(SW)의 텔레비젼모드접점(a)을 통한 B+전원공급이 차단되어 스위칭IC(2)의 제어단자가 "로우" 레벨로 된다. 따라서, 텔레비젼신호 스위칭접점(y)이 스위칭접점(z)으로 부터 개방됨과 동시에 텔레비젼신호 드라이브회로(5)내의 각 트랜지스터(Q1-Q3)가 B+구동전원을 공급받지 못해 모두 "오프"상태로 되므로 단자(1)로 부터 스위칭IC(2)로 입력되던 텔레비젼신호가 이 텔레비젼신호 드라이브회로(5)내의 트랜지스터(Q1)에 의해 차단된다.On the other hand, in the external video signal mode for receiving the external video signal, the mode switching switch SW is switched to the external video mode contact point b, whereby the television mode contact (a) of the mode switching switch SW is switched. B + power supply is cut off, and the control terminal of switching IC 2 is brought to the "low" level. Therefore, the television signal switching contact y is opened from the switching contact z and at the same time, each transistor Q 1 -Q 3 in the television signal drive circuit 5 is not supplied with B + driving power, and thus all are "off". In this state, the television signal input from the terminal 1 to the switching IC 2 is interrupted by the transistor Q 1 in the television signal drive circuit 5.

이와동시에 모드 전환스위치(SW)의 외부비디오드 접점(b)을 통해 스위칭IC(2)의 제어단자(x')로 B+전원이 공급되므로 외부비디오신호 스위칭접점(y')이 스위칭접점(z')에 접속되고 이에의해 단자(4)로 입력된 외부 비디오 신호가 스위칭IC(2)의 접속상태의 스위칭접점(y')(z')을 통해 신호 매칭회로(8)로 공급됨으로서 브라운관(7)에서는 외부비디오신호에 의한 화면이 디스플레이된다. 이때 다이오드(D) 및 제너다이오드(ZD)는 모드전환스위치(SW)의 텔레비젼모드 접점(a)을 통해 공급되는 B+전원이 차단됨에 따라 모드 "오프" 상태에 있게된다.At the same time, since B + power is supplied to the control terminal (x ') of the switching IC (2) through the external video contact (b) of the mode switching switch (SW), the external video signal switching contact (y') is the switching contact ( z ') is supplied to the signal matching circuit 8 via the switching contact y' (z ') in the connected state of the switching IC 2 by the external video signal inputted to the terminal 4 by the CRT. In (7), a screen by an external video signal is displayed. At this time, the diode D and the zener diode ZD are in the mode " off " state as the B + power supplied through the television mode contact a of the mode switching switch SW is cut off.

이상과 같이 본 고안은 2입력모드용 텔레비젼에 있어서, 텔레비젼 모우드시 텔레비젼신호 및 외부비디오 신호간의 상호 간섭에 의한 혼선을 제거시킬수 있어 깨끗한 화면을 볼 수 있는 유용한 고안이다.As described above, the present invention is a useful design that can remove a crosstalk caused by mutual interference between a television signal and an external video signal in a television mode in a two-input mode, so that a clean screen can be viewed.

Claims (1)

텔레비젼/외부비디오신호 스위칭 IC(2), 이 스위칭 IC(2)로 B+스위칭 제어전압을 선택적으로 인가시키는 모드전환스위치(SW) 및 텔레비젼신호 드라이브회로(5)를 포함하는 2입력 모드용 텔레비젼에 있어서 상기의 모드전환스위치(SW)의 텔레비젼모드접점(a)에 저항(R)을 연결하고, 이 저항(R)의 타단을 결합 콘덴서(C)를 통해 상기의 스위칭IC(2)의 외부비디오신호 스위칭 접점(y')에 연결하는 한편, 다이오드(D) 및 제너다이오드(ZD)를 통해 접지에 연결하여, 텔레비젼모드시 상기의 모드전환스위치(SW)를 통해 입력되는 B+전원으로 상기의 다이오드(D) 및 제너다이오드(ZD)를 도통시켜 외부비디오 입력신호를 상기의 결합콘덴서(C), 다이오드(D) 및 제너다이오드(ZD)를 통해 바이패스 시키도록 구성함을 특징으로 하는 2입력모드용 텔레비젼의 혼선제거회로.Television / external video signal switching IC (2), a television for two-input mode including a mode switching switch (SW) for selectively applying B + switching control voltage to the switching IC (2) and a television signal drive circuit (5). The resistor R is connected to the television mode contact a of the mode switching switch SW, and the other end of the resistor R is connected to the outside of the switching IC 2 through the coupling capacitor C. It is connected to the video signal switching contact (y '), while connected to the ground through the diode (D) and the zener diode (ZD), the B + power input through the mode switching switch (SW) in the television mode It is configured to bypass the external video input signal through the coupling capacitor (C), diode (D) and zener diode (ZD) by conducting the diode (D) and the zener diode (ZD) of the. A crosstalk cancellation circuit of an input mode television.
KR2019850005913U 1985-05-21 1985-05-21 Television for two-input mode KR880004484Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850005913U KR880004484Y1 (en) 1985-05-21 1985-05-21 Television for two-input mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019850005913U KR880004484Y1 (en) 1985-05-21 1985-05-21 Television for two-input mode

Publications (2)

Publication Number Publication Date
KR860015534U KR860015534U (en) 1986-12-30
KR880004484Y1 true KR880004484Y1 (en) 1988-12-20

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Application Number Title Priority Date Filing Date
KR2019850005913U KR880004484Y1 (en) 1985-05-21 1985-05-21 Television for two-input mode

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Publication number Publication date
KR860015534U (en) 1986-12-30

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