KR960006110Y1 - Noise control circuit upon no-signal channel selection - Google Patents
Noise control circuit upon no-signal channel selection Download PDFInfo
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- KR960006110Y1 KR960006110Y1 KR2019900016702U KR900016702U KR960006110Y1 KR 960006110 Y1 KR960006110 Y1 KR 960006110Y1 KR 2019900016702 U KR2019900016702 U KR 2019900016702U KR 900016702 U KR900016702 U KR 900016702U KR 960006110 Y1 KR960006110 Y1 KR 960006110Y1
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- signal
- processing circuit
- color
- output
- control circuit
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
내용없음No content
Description
제1도는 종래의 컬러 텔레비젼의 블록도1 is a block diagram of a conventional color television
제2도는 본 고안 무신호 채널 선택시 잡음 제어회로의 블록도2 is a block diagram of a noise control circuit when a signal-free channel is selected
제3도는 제2도의 부분 상세도3 is a partial detailed view of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 무신호검출기부 2 : 음향 및 화면제어회로1: No signal detector 2: Sound and screen control circuit
3, 6 : 인버터 4 : 적분기3, 6: Inverter 4: Integrator
5 : 비교기 7 : 수동색상선택스위치5: Comparator 7: Manual Color Selection Switch
8-12 : 릴레이 13 : 동기신호발생기8-12: Relay 13: Synchronous Signal Generator
14 : 음성처리회로 15 : R, G, B색상처리회로14: audio processing circuit 15: R, G, B color processing circuit
16 : 동기처리회로 S1-S5 : 스위치16: synchronization processing circuit S1-S5: switch
Q1-Q3 : 트랜지스터 Vref : 기준전압Q1-Q3: transistor Vref: reference voltage
OP1 : 연산증폭기OP1: Operational Amplifier
본 고안은 텔레비젼의 화면출력에 관한 것으로, 특히 무신호 채널의 선택시 스피커 및 화면의 잡음을 제거하는 무신호 채널 선택시 잡음제어회로에 관한 것이다.The present invention relates to a screen output of a television, and more particularly, to a noise control circuit when selecting a non-signal channel to remove noise of a speaker and a screen when selecting a no-signal channel.
일반적으로 사용되고 있는 종래의 텔레비젼 회로는 제1도에 도시한 바와같이 튜너, 라디오주파수증폭기, 영상 중간주파증폭기, 음성처리회로, 색상처리회로, 동기처리회로, 스피커 및 브라운관의 블럭으로 구성되며 이러한 구조를 갖는 텔레비젼은 무신호 채널을 선국하였을 때 화면 및 스피커에 잡음이 나타나서 시청자에게 불쾌감을 주었다.Conventionally used television circuits are composed of a tuner, a radio frequency amplifier, an image intermediate frequency amplifier, an audio processing circuit, a color processing circuit, a synchronization processing circuit, a speaker and a CRT block as shown in FIG. When a TV with a TV has been tuned to a no-signal channel, noise appears on the screen and the speaker, which is unpleasant to the viewer.
이와같은 종래 회로의 결함을 감안하여 본 고안은 동기신호의 유무를 통하여 무신호채널을 선택하였는지를 판단하는 무신호검출기와 무신호검출시에 화면에 일정한 단색을 출력하는 음향 및 화면제어회로를 제2도와 같은 구성으로 결합하여 무신호 채널 선택시 동작되도록 안출한 것으로 이의 세부적인 구성을 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.In view of such a deficiency of the conventional circuit, the present invention provides a signal-free detector for determining whether a signal-free channel is selected through the presence or absence of a synchronization signal, and a sound and screen control circuit for outputting a constant single color on the screen during signal-free detection. Combination of the same configuration as the diagram is designed to operate when selecting a non-signal channel as described in detail with reference to the accompanying drawings the detailed configuration as follows.
제3도는 본 고안의 상세회로도로 이에 도시한 바와같이 동기신호를 인버터(3)를 통하여 저항(R1) 및 콘덴서(C1)으로 구성되는 적분기(4)의 입력단자에 접속하고 상기 적분기(4)의 출력은 비교기(5)의 반전입력단자(-)에 입력하며 상기 비교기(5)의 출력단자는 인버터(6)를 거쳐서 릴레이(8-12)에 연결하여 무신호검출기부(1)를 구성한다.3 is a detailed circuit diagram of the present invention, as shown therein, a synchronous signal is connected to an input terminal of an integrator 4 composed of a resistor R1 and a capacitor C1 through an inverter 3, and the integrator 4 is connected. The output of the signal is input to the inverting input terminal (-) of the comparator 5, and the output terminal of the comparator 5 is connected to the relay 8-12 through the inverter 6 to constitute the signal-free detector unit 1. .
또한, 상기 무신호검출기부(1)의 출력단자는 음성처리회로(14), 색상처리회로(15) 및 동기 처리회로(16)와 접속된 스위치(S1-S5)가 접지 및 수동색상선택스위치(7)를 통해 전원(V1)단자에 연결되도록 하는 릴레이(8-12)에 접속하여 음향 및 화면제어회로(2)를 구성하며, 이때 음성처리회로(14)로부터의 출력은 스위치(S1)와 음성증폭기를 거쳐서 스피커를 구동하고 색상처리회로(15)는 스위치(S2-S4)를 통하여 적, 녹, 갈색의 구동트랜지스터(Q1-Q3)의 베이스에 연결하여 바이어스전압을 제공하며 스위치(S5)는 동기처리회로(16)의 출력단자를 편향코일에 접속시킨다.In addition, the output terminal of the signal-free detector unit 1 is connected to the voice processing circuit 14, the color processing circuit 15 and the synchronization processing circuit 16 (S1-S5) is grounded and manual color selection switch ( 7) is connected to the relay (8-12) to be connected to the power supply (V1) terminal to configure the sound and screen control circuit (2), wherein the output from the voice processing circuit 14 and the switch (S1) The speaker is driven through the voice amplifier, and the color processing circuit 15 is connected to the bases of the red, green, and brown driving transistors Q1-Q3 through the switches S2-S4 to provide a bias voltage, and the switch S5. Connects the output terminal of the synchronization processing circuit 16 to the deflection coil.
이와같이 구성한 본 고안의 작용효과에 대하여 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured in this way in detail as follows.
먼저 신호가 있는 채널을 선택하면, 동기신호가 인버터(3)에 입력되어 반전이 되며 이 신호는 적분기(4)에서 적분이 되어 직류전압으로 바뀌어 진 다음 비교기(5)에서 기준전압(Vref)과 비교가 되는데 만일 동기신호가 있으면 비교기(5)의 출력은 하이레벨이 되고 이어서 인버터(6)에 의하여 반전이 되어 로우레벨이 되므로 릴레이(8-12)는 작동하지 않게됨에 따라 각 스위치(S1-S5)는 원래의 접점(a)에 그대로 머물러 있게된다.First, when a channel with a signal is selected, a synchronous signal is input to the inverter 3 and inverted, and this signal is integrated in the integrator 4 and is converted into a DC voltage, and then the comparator 5 and the reference voltage Vref If there is a synchronous signal, the output of the comparator 5 becomes a high level and is then inverted by the inverter 6 to become a low level, so that the relays 8-12 are not operated. S5) remains intact at the original contact a.
그러나 만일 무신호 채널을 선택하게 되면, 동기신호가 없으므로 적분기(4)의 출력 뿐만 아니라 비교기(5)의 출력도 로우레벨을 나타내게 되며 이 전압은 인버터(6)에 의하여 하여레벨로 반전되므로 릴레이(8-12)를 구동하여 단자(a)에 접속되어 있는 모든 스위치(S1-S5)를 접점(b)로 전환시킨다.However, if no signal channel is selected, since there is no synchronization signal, not only the output of the integrator 4 but also the output of the comparator 5 exhibits a low level, and this voltage is inverted to the level by the inverter 6 so that the relay ( 8-12) are driven to switch all the switches S1-S5 connected to the terminal a to the contact b.
이때 각 스위치(S1-S5)의 전환에 의한 회로의 동작을 설명하면 먼저 스위치(S1)의 전환에 의하여 음성증폭기의 입력단자는 접지가 되어 스피커에는 아무런 잡음이 발생하지 않게되며 스위치(S2-S4)는 모두 단자(b)에 접속되나, 이들중에서 단하나의 단자만이 수동색상선택스위치(7)를 통해 특정색상의 구동트랜지스터(Q1-Q3)의 베이스로 바이어스전압(V1)을 보내므로 적, 갈, 녹색 중 이느하나의 색만이 화면에 나타나게 된다.At this time, the operation of the circuit by the switching of each switch (S1-S5) will be described first, the input terminal of the voice amplifier is grounded by the switching of the switch (S1) so that no noise occurs in the speaker and the switch (S2-S4) ) Are all connected to terminal (b), but only one of them sends the bias voltage (V1) to the base of the driving transistors (Q1-Q3) of a specific color through the manual color selection switch (7). Only one of the colors, brown or green will appear on the screen.
또한 스위치(S5)의 전환은 동기처리회로(16)로부터 편향코일에 인가되는 신호를 차단하고 동기신호발생기(13)의 출력을 편향코일에 인가하는 작용을 하게된다.In addition, the switching of the switch S5 serves to block the signal applied to the deflection coil from the synchronization processing circuit 16 and to apply the output of the synchronization signal generator 13 to the deflection coil.
이상에서와 같이 본 고안은 텔레비젼에서 동기신호를 적분하여 직류전압으로 변환한 다음 그 전압을 비교기(5)에서 기준전압(Vref)과 비교를 하고 그 결과에 따라서 릴레이(8-12)를 동작시켜 스위치(S1-S5)를 절환시키는 과정을 통해 무신호 채널을 선택하였을 경우, 스피커를 통하여 나오는 음향을 차단함은 물론 화면에 특정한 단색을 나타내어 채널전환시 발생하는 음향잡음 및 화면잡음을 제거하여 쾌적한 시청이 되게 할 뿐만 아니라 고품위, 고품질의 텔레비젼을 제공하는 효과가 있다.As described above, the present invention integrates the synchronous signal in the television, converts the DC signal into DC voltage, and then compares the voltage with the reference voltage Vref in the comparator 5, and operates the relay 8-12 according to the result. When the non-signal channel is selected through the process of switching the switch (S1-S5), the sound emitted through the speaker is not only blocked, but the specific color is displayed on the screen to remove sound noise and screen noise generated when switching channels. Not only does it allow viewing, but it also has the effect of providing high quality, high quality television.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900016702U KR960006110Y1 (en) | 1990-10-31 | 1990-10-31 | Noise control circuit upon no-signal channel selection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900016702U KR960006110Y1 (en) | 1990-10-31 | 1990-10-31 | Noise control circuit upon no-signal channel selection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920008599U KR920008599U (en) | 1992-05-20 |
| KR960006110Y1 true KR960006110Y1 (en) | 1996-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019900016702U KR960006110Y1 (en) | 1990-10-31 | 1990-10-31 | Noise control circuit upon no-signal channel selection |
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| Country | Link |
|---|---|
| KR (1) | KR960006110Y1 (en) |
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1990
- 1990-10-31 KR KR2019900016702U patent/KR960006110Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR920008599U (en) | 1992-05-20 |
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