KR900002148Y1 - Tunning display for television - Google Patents

Tunning display for television Download PDF

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Publication number
KR900002148Y1
KR900002148Y1 KR2019860017039U KR860017039U KR900002148Y1 KR 900002148 Y1 KR900002148 Y1 KR 900002148Y1 KR 2019860017039 U KR2019860017039 U KR 2019860017039U KR 860017039 U KR860017039 U KR 860017039U KR 900002148 Y1 KR900002148 Y1 KR 900002148Y1
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South Korea
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amplifier
voltage
inverting
signal
output
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KR2019860017039U
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Korean (ko)
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KR880011038U (en
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박찬웅
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주식회사금성사
구자학
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    • 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
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

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

Abstract

내용 없음.No content.

Description

텔레비젼 수상기의 선국표시회로Tuning display circuit of TV receiver

첨부된 도면은 본 고안의 선국 표시회로도이다.The accompanying drawings are selected channel display circuit diagrams of the present invention.

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

1 : 완충증폭기 2 : 반전증폭기1: buffer amplifier 2: inverting amplifier

3 : 증폭기 4 : 표시구동부3: amplifier 4: display driver

본 고안은 텔레비젼 수상기에 있어서, 방송신호를 정확히 선국하였는지를 표시하는 텔레비젼 수상기의 선국표시 회로에 관한 것이다.The present invention relates to a tuner display circuit of a television receiver for displaying whether or not a broadcast signal has been tuned correctly in a television receiver.

종래의 텔레비젼 수상기는 튜너부에 미조정 노브를 부착하여 눈으로 화면을 보면서 미조정 즉, 방송신호를 정확히 선국하게 하였으므로 미조정을 정확히 하기가 매우 어려움은 물론 미조정이 정확히 되었는지를 알 수 없는 결함이 있었다.Conventional television receivers have fine tune knobs on the tuner, which makes fine tuning, ie, broadcast signals, while watching the screen with your eyes, making it very difficult to accurately fine tune and not know if the fine tune is correct. There was this.

그리고, 실용신안등록출원 제 84-6870호(공고번호 86-1646)에서는 수평동기신호와 수평블랭킹 펄스신호를 이용하여 미조정이 되어 있지 않으면 표시램프의 점멸을 반복시키고, 미조정이 되면 표시램프를 점동시켜 미조정 상태를 표시하게 하였으나, 이와같이 수평동기신호 및 수평블랭킹 펄스신호를 이용하여 미조정상태를 표시하는 것은 수평동기신호와 수평 블랭킹 펄스신호가 일치되지 않으면 화면이 흐르게되어 방송신호의 시청이 불가능하게 되고, 또한 수평동기신호는 텔레비젼 방송신호가 수신되면 정확한 선국의 여부에 관계없이 약간 이조되어도 수평 블랭킹 펄스신호와 정확이 일치되어 정확한 선국의 여부를 표시하지 못하는 결함이 있었다.Utility Model Registration Application No. 84-6870 (Notice No. 86-1646) uses the horizontal synchronizing signal and the horizontal blanking pulse signal to repeat the flashing of the display lamp unless the adjustment is made. The display shows the unadjusted state by using the horizontal sync signal. However, the display of the unadjusted state using the horizontal sync signal and the horizontal blanking pulse signal causes the screen to flow when the horizontal sync signal and the horizontal blanking pulse signal do not coincide with each other. This becomes impossible, and there is a defect that the horizontal synchronization signal is not matched with the horizontal blanking pulse signal exactly even when slightly tuned when the television broadcast signal is received, and thus it is not possible to indicate the correct tuning.

본 고안은 이와같은 종래의 결함을 감안하여, 정확한 선국에 따라 그 크기가 가변되는 AFT 전압을 이용하여 발광다이오드를 점등 또는 소등시키게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is designed to turn on or off the light emitting diode using an AFT voltage whose size varies according to the correct selection, in consideration of such a conventional defect, which will be described in detail with reference to the accompanying drawings.

첨부된 도면에 도시한 바와같이 AFT전압 입력단자(IN)가 베이스에 접속된 트랜지스터(TR1)의 에미터를 저항(R1)에 접속하여 완충증폭기(1)를 구성하고, 완층증폭기(1)의 출력단자는 저항(R2)을 통해 연산증폭기(OP1)의 반전입력단자(-)에 접속하여 그 접속점에 연산증폭기(OP1)의 출력단자를 저항(R3)을 통해 접속하고, 연산증폭기(OP1)의 비반전입력단자(+)는 전원단자(Vcc)에 직렬접속된 저항(R4)(R5)의 접속점에 접속하여 반전증폭기(2)를 구성하며, 상기 완충증폭기(1)의 출력단자 및 반전증폭기(2)를 구성하며, 상기 완층증폭기(1)의 출력단자 및 반전증폭기(2)의 출력단자는 다이오드(D1)(D2)를 각기 통하고, 정전압다이오드(ZD1)를 통해 저항(R6) 및 연산증폭기(OP2) 비반전입력단자(+)에 접속하고, 연산증폭기(OP2)의 반전입력단자(-)에는 저항(R8)을 접속함과 아울러 그 접속점에 연산증폭기(OP2)의 출력단자를 저항(R7)을 통해 접속하여 증폭기(3)를 구성하며, 증폭기(3)의 출력단자는 트랜지스터(TR2)의 베이스에 접속하고, 트랜지스터(TR2)의 콜렉텨에는 선국표시용 발광다이오드(LED1)를 접속하여 구성한 것이다.As shown in the accompanying drawings, the buffer amplifier 1 is configured by connecting the emitter of the transistor TR 1 connected to the base with the AFT voltage input terminal IN to the resistor R 1 to form the buffer amplifier 1 an output terminal of) resistance (R 2) the operational amplifier (OP 1), the inverting input terminal (the through-connected via a) the resistance (R 3) to the output terminal of the operational amplifier (OP 1), the connection point thereof and connected to, The non-inverting input terminal (+) of the operational amplifier OP 1 is connected to the connection point of the resistor R 4 (R 5 ) connected in series with the power supply terminal Vcc to form the inverting amplifier 2, and the buffer amplifier The output terminal of (1) and the inverting amplifier (2) are constituted, and the output terminal of the slow amplifier (1) and the output terminal of the inverting amplifier (2) pass through the diodes (D 1 ) (D 2 ), respectively, and the constant voltage diode (ZD 1) via a resistor (R 6) and the operational amplifier (OP 2) connected to the non-inverting input terminal (+) and the inverting input terminal of the operational amplifier (OP 2) (-) has a resistor (R 8) It belongs to as well as configure the amplifier 3 connected to the output terminal of the operational amplifier (OP 2) to the connection point via a resistor (R 7), and An output terminal of the amplifier 3 is connected to the base of the transistor (TR 2) The selector display light emitting diode LED 1 is connected to the collector of the transistor TR 2 .

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

전원단자(Vcc)에 전원이 인가되고, 방송신호를 선국하여 그 선국에 따른 AFT전압이 AFT전압입력단자(IN)에 입력되면, 그 입력된 AFT 전압은 완충증폭기(1)의 트랜지스터(TR1)베이스에 인가되어 그의 에미터로 출력되고, 그 출력된 AFT 전압은 반전증폭기(2)를 통해 반전증폭된다.When power is applied to the power supply terminal Vcc, and the broadcast signal is tuned and the AFT voltage corresponding to the tuning is input to the AFT voltage input terminal IN, the input AFT voltage is applied to the transistor TR 1 of the buffer amplifier 1. Is applied to the base and output to its emitter, and the output AFT voltage is inverted through the inverting amplifier 2.

여기서, 반전증폭기(2)의 저항(R2)(R3)의 값을 동일하게 하여 반전증폭기(2)의 이득인 1이 되게하고, 전원단자(Vcc)의 전원을 저항(R4)(R5)으로 분할하여 연산증폭기(OP)의 비반전입력단자(+)에 인가되는 전압이 방송신호를 정확히 선국하였을 경우의 AFT전압 즉, 방송신호를 정확히 선국하였을 경우의 AFT전압인 약 6.5V가 연산증폭기(OP1)의 비반전입력단자(+)에 인가되게 저항(R4)(R5)의 값을 설정하면, 방송신호가 정확히 선국되어 입력단자(IN)로 6.5V의 AFT전압이 입력될 경우에 완충증폭기(1)의 출력단자에서 6.5V의 전압이 출력되어 인가 즉, 방송신호가 정확히 선국되었을 경우에 완충증폭기(1) 및 반전증폭기(2)의 출력 단자에는 동일한 6.5V의 전압이 출력되어 그 6.5V의 전압이 다이오드(D1)(D21)를 통해 정전압다이오드(ZD1)의 캐소드에 인가되고, 방송신호가 정확히 선국되지 않아 6.5V 이상의 AFT전압이 입력되면, 완충증폭기(1)의 출력 단자에는 6.5V 보다 낮은 AFT 전압이 입력되면, 완충증폭기(1)의 출력단자에는 6.5V보다 낮은 전압이 출력되고, 반전증폭기(2)의 출력단자에는 6.5V보다 높은 전압이 출력되어 그 반전증폭기(2)에서 출력된 6.5V 보다 높은 전압이 다이오드(D2)를 통해 정전압다이오드(ZD1)의 캐소드에 인가 즉, 방송신호가 정확히 선국되면 정전압다이오드(ZD1)의 캐소드에 6.5V의 전압이 인가되고, 정확히 선국되지 않으면 6.5V보다 높은 전압이 인가된다.Here, the values of the resistors R 2 and R 3 of the inverting amplifier 2 are equal to be 1, which is a gain of the inverting amplifier 2, and the power supply of the power supply terminal Vcc is connected to the resistor R 4 ( The voltage applied to the non-inverting input terminal (+) of the operational amplifier OP by dividing by R 5 ) is an AFT voltage when the broadcast signal is tuned correctly, that is, an AFT voltage of about 6.5V when the broadcast signal is tuned correctly. When the value of resistor R 4 (R 5 ) is set to be applied to the non-inverting input terminal (+) of the operational amplifier OP 1 , the broadcast signal is tuned correctly and an AFT voltage of 6.5V is input to the input terminal IN. When this input is applied, a voltage of 6.5V is output from the output terminal of the buffer amplifier 1, i.e., when the broadcast signal is tuned correctly, the same 6.5V is applied to the output terminals of the buffer amplifier 1 and the inverting amplifier 2. is the voltage of the output voltage of 6.5V is applied to the cathode of the zener diode (ZD 1) through the diode (D 1) (D 21) , broadcasting new When AFT voltage of 6.5V or more is inputted because of not being tuned correctly, AFT voltage lower than 6.5V is input to the output terminal of the buffer amplifier 1, and voltage lower than 6.5V is output to the output terminal of the buffer amplifier 1, In addition, a voltage higher than 6.5 V is output to the output terminal of the inverting amplifier 2 and a voltage higher than 6.5 V output from the inverting amplifier 2 is applied to the cathode of the constant voltage diode ZD 1 through the diode D 2 . That is, if the broadcast signal is tuned correctly, a voltage of 6.5V is applied to the cathode of the constant voltage diode ZD 1 , and if not, the voltage higher than 6.5V is applied.

그리고, 여기서 정전압다이오드(ZD1)의 제너전압을 6.5V보다 약간 높게 설정하면, 방송신호가 정확히 선국되었을 경우에 정전압다이오드(ZD1)는 오프되어 연산증폭기(OP2)의 비반전입력단자(+)에 저전위신호가 인가되므로 연산증폭기(OP1)의 출력단자에는 저전위신호가 출력되어 표시구동부(4)의 트랜지스터(TR2) 베이스에 저전위신호가 인가되고, 이에따라 트랜지스터(TR2)는 오프되어 발광다이오드(LED1)는 점등되지 않게 된다.If the Zener voltage of the constant voltage diode ZD 1 is set slightly higher than 6.5 V, when the broadcast signal is correctly tuned, the constant voltage diode ZD 1 is turned off so that the non-inverting input terminal of the operational amplifier OP 2 ( +), so is a low potential signal output terminal of the operational amplifier (OP 1) the is applied to a transistor (TR 2), the low potential signal to the base of the low potential signal is outputted display probe (4), yiettara transistor (TR 2 ) Is turned off so that the light emitting diode LED 1 is not turned on.

그리고, 방송신호가 정확히 선국되지 않았을 경우에는 정전압다이오드(ZD1)가 도통되어 그의 캐소드에 인가된 6.5V이상의 전압이 정전압다이오드(ZD1)를 통해 연산증폭기(OP2)의 비반전입력단자(+)에 인가되므로 연산증폭기(OP2)의 출력단자에는 일정전압이 출력되어 트랜지스터(TR2)의 베이스에 인가되고, 이에따라 트랜지스터(TR2)는 온되어 발광다이오드(LED1)가 점등되면서 방송신호가 정확히 선국되지 않았음을 표시하게 된다.When the broadcast signal is not tuned correctly, the constant voltage diode ZD 1 is turned on so that a voltage of 6.5 V or more applied to the cathode thereof is applied to the non-inverting input terminal of the operational amplifier OP 2 through the constant voltage diode ZD 1 . +) is applied, because the output terminal of the operational amplifier (OP 2) there is outputted a constant voltage is applied to the base of the transistor (TR 2), yiettara transistor (TR 2) is as the indicator has been a light emitting diode (LED 1) shows the This will indicate that the signal has not been tuned correctly.

이때, 연산증폭기(OP2)의 비반전입력단자(+)에 인가되는 전압을 방송신호의 선국정도에 따라 가변되어 그의 출력전압도 가변되므로 트랜지스터(TR2)의 베이스에 인가되는 전압도 방송신호의 선국정도에 따라 가변되어 발광다이오드(LED1)의 밝기는 방송신호의 선국정도에 따라 가변 즉, 방송신호의 선국에 따라 AFT전압의 편차가 클 경우에는 발광다이오드(LED1)가 밝게 점등되고, 편차가 작을 경우에는 어둡게 점등된다.At this time, the voltage applied to the non-inverting input terminal (+) of the operational amplifier (OP 2 ) is changed according to the tuning degree of the broadcast signal, and its output voltage is also variable, so that the voltage applied to the base of the transistor TR 2 is also the broadcast signal. is variable according to preset amount of brightness of the light emitting diode (LED 1) of in accordance with the preset level of the broadcast signal a variable that is, when the deviation of the AFT voltage is large in accordance with the channel selection of a broadcast signal, a light emitting diode (LED 1) is turned bright If the deviation is small, it lights dimly.

이상에서 설명한 바와같이 본 고안은 방송신호의 선국정도에 따라 가변되는 AFT 전압을 이용하여 정확히 선국되었을 경우에는 발광다이오드(LED1)를 소등시키고, 정확히 선국되지 않았을 경우에는 그 선국의 정도에 따른 AFT 전압의 편차를 이용하여 발광다이오드(LED1)의 밝기를 가변시키므로 사용자가 간단히 미조정을 할수 있음은 물론 방송신호를 정확히 선국하였는지를 알 수 있는 효과가 있다.As described above, the present invention turns off the light-emitting diode (LED 1 ) when tuned correctly using an AFT voltage that varies according to the degree of tuning of the broadcast signal, and AFT according to the degree of tuning if not tuned correctly. By varying the brightness of the light emitting diode (LED 1 ) by using the deviation of the voltage, the user can easily fine-tune, as well as the effect that you can know whether the broadcast signal is correctly tuned.

Claims (1)

방송신호의 선국정도에 따라 입력되는 AFT전압을 완충 증폭하는 완층증폭기(1)와, 상기 완충증폭기(1)의 출력 전압을 기준전압과 비교하여 반전증폭하는 반전증폭기(2)와, 상기 완충증폭기(1)의 출력전압 또는 상기 반전증폭기(2)의 출력전압이 제너다이오드(ZD1)의 제너전압 이상이될 때 고전위 신호를 출력하는 증폭부(3)와, 상기 증폭기(3)에서 고전위 신호가 출력될 때 발광다이오드(LED1)를 점등시키게 제어하는 표시구동부(4)로 구성하여 된 것을 특징으로 하는 방송신호 선국표시회로.A slow amplifier 1 for buffering and amplifying the input AFT voltage according to the tuning degree of a broadcast signal; an inverting amplifier 2 for inverting and amplifying the output voltage of the buffer amplifier 1 with a reference voltage; and the buffer amplifier. An amplifier 3 for outputting a high potential signal when the output voltage of (1) or the output voltage of the inverting amplifier 2 becomes equal to or greater than the zener voltage of the zener diode ZD 1 , and the high potential in the amplifier 3. And a display driver (4) for controlling the light emitting diode (LED 1 ) to light up when a signal is output.
KR2019860017039U 1986-11-03 1986-11-03 Tunning display for television KR900002148Y1 (en)

Priority Applications (1)

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KR2019860017039U KR900002148Y1 (en) 1986-11-03 1986-11-03 Tunning display for television

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Application Number Priority Date Filing Date Title
KR2019860017039U KR900002148Y1 (en) 1986-11-03 1986-11-03 Tunning display for television

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KR880011038U KR880011038U (en) 1988-07-29
KR900002148Y1 true KR900002148Y1 (en) 1990-03-15

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KR2019860017039U KR900002148Y1 (en) 1986-11-03 1986-11-03 Tunning display for television

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436146B1 (en) * 2001-12-08 2004-06-14 삼성전자주식회사 Wall mounting type microwave oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436146B1 (en) * 2001-12-08 2004-06-14 삼성전자주식회사 Wall mounting type microwave oven

Also Published As

Publication number Publication date
KR880011038U (en) 1988-07-29

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