KR970055271A - Car audio volume level indicator - Google Patents

Car audio volume level indicator Download PDF

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Publication number
KR970055271A
KR970055271A KR1019950058089A KR19950058089A KR970055271A KR 970055271 A KR970055271 A KR 970055271A KR 1019950058089 A KR1019950058089 A KR 1019950058089A KR 19950058089 A KR19950058089 A KR 19950058089A KR 970055271 A KR970055271 A KR 970055271A
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KR
South Korea
Prior art keywords
signal output
light emitting
outputting
car audio
emitting diode
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Application number
KR1019950058089A
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Korean (ko)
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KR100203477B1 (en
Inventor
김은식
Original Assignee
김태구
대우자동차 주식회사
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Priority to KR1019950058089A priority Critical patent/KR100203477B1/en
Publication of KR970055271A publication Critical patent/KR970055271A/en
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Publication of KR100203477B1 publication Critical patent/KR100203477B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/008—Visual indication of individual signal levels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

본 발명은 카오디오의 볼륨 레벨 표시장치에 관한 것으로, 카오디오의 볼륨을 조절하기 위한 포텐시오미터(10)와; 자동차 실내의 소음 레벨을 감지하는 소음감지부(20); 상기 포텐시오미터(10)에서 출력된 볼륨 조절 신호와 상기 소음감지부(20)에서 출력된 소음 레벨 신호를 차동 증폭하여 출력하는 차동증폭기(30); 상기 차동 증폭기(30)에서 출력된 신호에 따라 전원(Vcc)을 공급하는 발광다이오드 구동부(40) 및; 상기 발광다이오드 구동부(40)로부터 전원(Vcc)을 공급받아 점등되는 발광다이오드부(50)를 포함하여 구성되어, 운전자 또는 승객이 실제로 느끼는 카오디오의 볼륨 레벨을 표시할 수 있는 것이다.The present invention relates to a volume level display device for a car audio, comprising: a potentiometer (10) for adjusting the volume of the car audio; Noise detection unit 20 for detecting the noise level of the vehicle interior; A differential amplifier (30) for differentially amplifying and outputting the volume control signal output from the potentiometer (10) and the noise level signal output from the noise detector (20); A light emitting diode driver 40 for supplying power Vcc according to the signal output from the differential amplifier 30; The light emitting diode driving unit 40 is configured to include a light emitting diode unit 50 which is turned on by receiving power (Vcc), it is possible to display the volume level of the car audio actually felt by the driver or passenger.

Description

카오디오의 볼륨 레벨 표시장치Car audio volume level indicator

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

제1도는 본 발명에 따른 카오디오의 볼륨 레벨 표시장치의 회로도이다.1 is a circuit diagram of a volume level display device of a car audio according to the present invention.

제2도는 본 발명에 따른 발광다이오드부의 외관도이다.2 is an external view of a light emitting diode unit according to the present invention.

Claims (5)

카오디오의 볼륨을 조절하기위한 포텐시오미터(10)와; 자동차 실내의 소음 레벨을 감지하는 소음감지부(20); 상기 포텐시오미터(10)에서 출력된 볼륨 조절 신호와 상기 소음감지부(20)에서 출력된 소음 레벨 신호를 차동 증폭하여 출력하는 차동증폭기(30); 상기 차동증폭기(30)에서 출력된 신호에 따라 전원(Vcc)을 공급하는 발광다이오드 구동부(40) 및; 상기 발광다이오드 구동부(40)로부터 전원(Vcc)을 공급받아 점등되는 발광다이오드부(50)를 포함하여 구성된 것을 특징으로 하는 카오디오의 볼륨 레벨 표시장치.A potentiometer 10 for adjusting the volume of the car audio; Noise detection unit 20 for detecting the noise level of the vehicle interior; A differential amplifier (30) for differentially amplifying and outputting the volume control signal output from the potentiometer (10) and the noise level signal output from the noise detector (20); A light emitting diode driver 40 for supplying power Vcc according to the signal output from the differential amplifier 30; And a light emitting diode unit (50) which is turned on by receiving power (Vcc) from the light emitting diode driver (40). 제1항에 있어서, 상기 소음감지부(20)는, 차내의 소음을 전기적 신호로 변환하여 출력하는 마이크로폰(21)과; 상기 마이크로폰(21)에서 출력된 전기적 신호를 저대역 통과 여파하여 출력하는 저대역통과여파기(22); 상기 저대역통과여파기(22)에서 출력된 신호를 증폭하여 출력하는 증폭기(23); 상기 증폭기(23)에서 출력된 신호를 정류하여 출력하는 정류부(24); 상기 정류부(24)에서 출력된 신호를 평활하여 출력하는 상기 차동 증폭기(30)로 입력하는 평활부(25)를 포함하여 구성된 것을 특징으로 하는 카오디오의 볼륨 레벨 표시장치.The noise detector of claim 1, further comprising: a microphone (21) for converting noise in the vehicle into an electrical signal and outputting the electrical signal; A low pass filter 22 for outputting the low pass filter of the electrical signal output from the microphone 21; An amplifier (23) for amplifying and outputting the signal output from the low pass filter (22); A rectifier 24 for rectifying and outputting the signal output from the amplifier 23; And a smoothing unit (25) input to the differential amplifier (30) for smoothing and outputting the signal output from the rectifying unit (24). 제1항에 있어서, 상기 발광다이오드 구동부(40)는, 상기 차동증폭기(30)에서 출력된 전류값에 비례하여 베이스 전류를 공급하도록 비례 저항값을 가지는 다수개의 저항(R1 ~ Rn)과, 상기 각 저항(R1 ~ Rn)을 통해 입력된 베이스 전류에 따라 온/오프되는 다수개의 트랜지스터(TR1 ~ TRn)로 이루어진 것을 특징으로 하는 카오디오의 볼륨 레벨 표시장치.According to claim 1, wherein the LED driving unit 40, a plurality of resistors (R1 ~ Rn) having a proportional resistance value to supply a base current in proportion to the current value output from the differential amplifier 30, And a plurality of transistors (TR1 to TRn) turned on / off according to a base current input through each of the resistors (R1 to Rn). 제1항에 있어서, 상기 발광다이오드부(50)는, 상기 발광다이오드 구동부(40)의 각 트랜지스터(TR1 ~ TRn)가 턴온시에 발광하는 다수개의 발광다이오드(LED1 ~ LEDn)로 이루어진 것을 특징으로 하는 카오디오의 볼륨 레벨 표시장치.The light emitting diode unit 50 of claim 1, wherein each of the transistors TR1 to TRn of the LED driving unit 40 emits light when turned on. Car audio volume level indicator. 제4항에 있어서, 상기 각 발광다이오드(LED1 ~ LEDn)는, 일렬로 밀착되어 형성된 구조로 된 것을 특징으로 하는 카오디오의 볼륨 레벨 표시장치.5. The volume level display device for car audio according to claim 4, wherein each of the light emitting diodes (LED1 to LEDn) has a structure formed in close contact with each other in a line. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950058089A 1995-12-27 1995-12-27 Volumn level display device of car audio KR100203477B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950058089A KR100203477B1 (en) 1995-12-27 1995-12-27 Volumn level display device of car audio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950058089A KR100203477B1 (en) 1995-12-27 1995-12-27 Volumn level display device of car audio

Publications (2)

Publication Number Publication Date
KR970055271A true KR970055271A (en) 1997-07-31
KR100203477B1 KR100203477B1 (en) 1999-06-15

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Application Number Title Priority Date Filing Date
KR1019950058089A KR100203477B1 (en) 1995-12-27 1995-12-27 Volumn level display device of car audio

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KR100203477B1 (en) 1999-06-15

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