KR20040106884A - Device for controlling illumination degree of car digital clock - Google Patents

Device for controlling illumination degree of car digital clock Download PDF

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Publication number
KR20040106884A
KR20040106884A KR1020030037854A KR20030037854A KR20040106884A KR 20040106884 A KR20040106884 A KR 20040106884A KR 1020030037854 A KR1020030037854 A KR 1020030037854A KR 20030037854 A KR20030037854 A KR 20030037854A KR 20040106884 A KR20040106884 A KR 20040106884A
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KR
South Korea
Prior art keywords
digital clock
clock
current
lighting
photo transistor
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KR1020030037854A
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Korean (ko)
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KR100527937B1 (en
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김영갑
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현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
    • B60Q3/16—Circuits; Control arrangements
    • B60Q3/18—Circuits; Control arrangements for varying the light intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
    • B60Q3/14—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards lighting through the surface to be illuminated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0457—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2106/00—Interior vehicle lighting devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

PURPOSE: An illumination control device of a digital clock for a vehicle is provided to improve the visibility by controlling the photosensitive function even if a head light or a tail light is lighted on in the daytime. CONSTITUTION: An illumination control device of a digital clock for a vehicle has a photosensitive control circuit(70) using a photo transistor(51) and placed on a lighting drive circuit unit(40) connected with a clock lighting(33). A light amplifying unit(50) is added to the lighting drive unit. When a tail light switch(16) is operated, currents are generated by the lights in the photo transistor of the light amplifying unit. The generated currents are amplified by a current amplifier(53). The amplified currents flow to the lighting. Thus, the lighting is driven without reduction of current.

Description

자동차용 디지털시계의 조명 제어장치{Device for controlling illumination degree of car digital clock}Device for controlling illumination degree of car digital clock}

본 발명은 자동차용 디지털시계 조명 제어장치에 관한 것으로, 특히 시계 회로 내부에 감광 차단회로를 구비하여 주간에는 감광기능을 해제하여 디스플레이를 밝게 하고, 야간에는 감광기능이 작동되도록 하여 디지털시계의 시인성을 좋게 하는 자동차용 디지털시계 조명 제어장치에 관한 것이다.The present invention relates to a digital clock lighting control device for an automobile, and in particular, having a photosensitive circuit inside the clock circuit to release the photosensitive function during the day to brighten the display, and to operate the photosensitive function at night, the visibility of the digital clock The present invention relates to a digital clock lighting control device for a car.

도 1a 는 종래의 기술에 따른 자동차용 디지털시계 조명 제어장치의 회로도의 일예이고,Figure 1a is an example of a circuit diagram of a digital clock lighting control device for a vehicle according to the prior art,

도 1b 는 상기 도 1a 의 디지털시계 시계 구동 제어부(20)의 내부 회로도이다.FIG. 1B is an internal circuit diagram of the digital clock clock driving controller 20 of FIG. 1A.

상기 도면을 참조하면, 종래의 일반적인 자동차용 디지털시계는 배터리(11)와 점화 스위치 에이씨씨단(ACC)단(17)과 미등 스위치(16)의 출력단에 연결되어 이들의 출력신호에 따라 제어신호를 출력하는 시계 구동 제어부(20)와, 이 제어부(20)의 출력단에 연결되어 시간을 표시하는 디스플레이(31)가 구비된 시계(30)로 구성된다. 이때 상기 배터리(11)와 시계 디스플레이(31) 간에는 퓨즈(13)를 통해 상시 전원이 연결되고, 상기 배터리(11)와 연결된 다른 퓨즈(15)와 시계 디스플레이(31)의 사이에는 점화 스위치(17)와 미등 스위치(16)가 연결되어 있다.Referring to the drawings, a conventional general automotive digital clock is connected to the output terminal of the battery 11, the ignition switch ACC stage (17) and the taillight switch (16) and control signals according to their output signals. And a clock 30 having a display 31 connected to an output terminal of the controller 20 and displaying a time. At this time, the constant power is connected between the battery 11 and the clock display 31 through the fuse 13, and the ignition switch 17 is disposed between the clock display 31 and the other fuse 15 connected to the battery 11. ) And taillight switch 16 are connected.

종래의 자동차용 디지털시계 조명 제어장치에 있어서, 전류제어는 LED 측 전원부를 PWM 방식으로 제어하는 것으로, 마이컴(21)은 8 비트로 256가지의 조합으로 전류제어를 최대 20 - 5mA 범위에서 한다. 트랜지스터 어래이(23)는 상기 마이컴(21)의 조합에 의한 입력신호를 받아 전압을 0 - 5V 범위 내에서 전압을 가변시키는 역할을 한다. 그리고 비교기(24)는 전압비교를 하여 트랜지스터 어레이(23)측 전압이 클 경우(피드백 전압) 트랜지스터(25)를 통전시켜 시계측으로 흐르는 전류(26)를 크게 한다. 전류는 저항(27)으로 전달된 후 전압으로 변하여 다시 비교기(24)로 입력되고, 전압이 상승될 경우 트랜지스터(25)를 차단하여 전류를 작게 한다.In the conventional automotive digital clock lighting control device, the current control is to control the LED-side power supply unit by the PWM method, the microcomputer 21 is 8 bits in the combination of 256 kinds of current control in the maximum 20-5mA range. The transistor array 23 receives an input signal by the combination of the microcomputer 21 and serves to change the voltage within a range of 0-5V. When the voltage of the transistor array 23 side is large (feedback voltage), the comparator 24 conducts the transistor 25 to increase the current 26 flowing clockwise. The current is transferred to the resistor 27 and then converted into a voltage and input again to the comparator 24. When the voltage is increased, the current is reduced by cutting off the transistor 25.

상기와 같은 구조의 종래의 자동차용 디지털시계 조명 제어장치에 있어서, 야간 주행시 미등 스위치가 온되면 시계 디스플레이(31)의 조도를 약 30% 정도 감광시켜 운전자의 눈부심을 방지하여 눈의 피로를 덜어 준다.In the conventional vehicle digital clock lighting control device having the above structure, when the tail light switch is turned on during night driving, the illumination of the clock display 31 is reduced by about 30% to prevent glare of the driver, thereby reducing eye fatigue. .

그러나 최근 주간에도 미등 혹은 전조등을 켜고 주행하는 차량이 점차 늘어 나고 있으며, 이 경우 낮에도 감광기능이 작동하게 되어 시계나 LED/ 엘이디 디스플레이는 어두워 거의 보이지 않는 문제점이 발생된다.However, even in recent days, the number of vehicles driving with taillights or headlights is gradually increasing. In this case, the photosensitive function is activated during the day, so that the clock or the LED / LED display is dark and almost invisible.

따라서 본 발명은 상기한 종래의 문제점을 해결하기 위하여 제안된 것으로, 본 발명은 주간에 미등/전조등이 점등되어도 감광기능이 작동되지 않도록 함으로써 시계의 시인성을 향상시킬 수 있는 자동차용 디지털시계 조명 제어장치를 제공하는 것을 목적으로 한다.Therefore, the present invention has been proposed to solve the above-mentioned conventional problems, the present invention is a digital clock lighting control device for a car that can improve the visibility of the clock by preventing the photosensitive function does not operate even when the tail light / headlights are turned on during the day The purpose is to provide.

도 1a 는 종래의 기술에 따른 자동차용 디지털시계 조명 제어장치의 회로도,1A is a circuit diagram of a digital clock illumination control apparatus for a vehicle according to the prior art;

도 1b 는 상기 도 1a 의 디지털시계 시계 구동 제어부의 내부 회로도,1B is an internal circuit diagram of the digital clock clock driving controller of FIG. 1A;

도 2 는 본 발명에 따른 자동차용 디지털시계 조명 제어장치의 회로도임.2 is a circuit diagram of a digital clock lighting control apparatus for a vehicle according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

11 : 배터리 16 : 미등 스위치11: battery 16: taillight switch

20 : 시계 구동 제어부 30 : 시계20: clock driving control 30: clock

40 : 조명등 구동회로부 50 : 광증폭부40: light driving circuit portion 50: optical amplifier

51 : 포토 트랜지스터 53 : 전류 증폭기51: photo transistor 53: current amplifier

70 : 감광 차단회로70: photosensitive circuit

상기 목적을 달성하기 위한 본 발명의 자동차용 디지털시계 조명 제어장치는, 포토 트랜지스터를 이용한 광증폭부를 시계 조명등과 연결되는 조명등 구동회로에 부가하여 이루어지는 감광 차단회로를 구비함에 의해, 미등 스위치의 작동시 시계의 디스플레이의 조도가 감소하지 않도록 한 것을 특징으로 한다.The digital clock lighting control apparatus for automobiles of the present invention for achieving the above object comprises a photosensitive blocking circuit formed by adding an optical amplifier using a photo transistor to a lamp driving circuit connected to a clock lamp, when the tail light switch is operated. It is characterized in that the illuminance of the display of the watch is not reduced.

본 발명의 상기 광증폭부는 빛에 의해 전류를 만들어 내는 포토 트랜지스터와 상기 포토 트랜지스터에서 생성된 전류를 증폭시키는 전류 증폭기로 구성된다.The optical amplifier of the present invention comprises a photo transistor for generating current by light and a current amplifier for amplifying the current generated by the photo transistor.

이하 첨부된 도면을 참조하여 본 발명에 따른 자동차의 자동차용 디지털시계 조명 제어장치의 합한 실시예에 대해 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a combined embodiment of the automotive digital clock lighting control apparatus for a vehicle according to the present invention.

참고로, 이하의 본 발명의 도면에서 종래의 자동차용 디지털시계 조명 제어장치와 동일한 구성에 대해선 동일한 부호를 부여하기로 한다.For reference, in the drawings of the present invention will be given the same reference numerals for the same configuration as the conventional vehicle digital clock lighting control device.

도 2 는 본 발명에 따른 자동차용 디지털시계 조명 제어장치의 회로 구성도이다.2 is a circuit diagram of a digital clock lighting control apparatus for a vehicle according to the present invention.

본 발명에 따른 디지털시계 조명 제어장치는 포토 트랜지스터(51)를 이용한 감광 차단회로(50)를 시계 조명등(33)과 연결되는 조명등 구동회로부(40)의 회로선로상에 구비하고 있다.The digital clock lighting control apparatus according to the present invention includes a photosensitive blocking circuit 50 using the photo transistor 51 on the circuit line of the lamp driving circuit unit 40 connected to the clock lamp 33.

상기 감광 차단회로(50)는 빛에 의해 자체적으로 전류를 만들어 내는 포토 트랜지스터(51)와 상기 포토 트랜지스터(51)에서 생성된 전류를 증폭시키는 증폭기(53)로 구성된다.The photosensitive blocking circuit 50 includes a photo transistor 51 that generates current by itself and an amplifier 53 that amplifies the current generated by the photo transistor 51.

상기 조명동 구동회로(40)는 종래의 감광기능이 수행되게 하는 기능을 구비한 회로로서, 트랜지스트(41), 다이오드(43), 저항(45)의 구성요소를 구비하고 있다.The illumination driving circuit 40 is a circuit having a function of performing a conventional photosensitive function, and includes components of a transistor 41, a diode 43, and a resistor 45.

상기 회로에서, 미등 스위치(16)가 작동하게 되면 전류가 조명등 구동회로(40)의 내부 다이오드(43)를 거쳐 저항(45)으로 흐르게 되고, 저항(45)에 의해 전류는 감소되어 결국 조명등(33)으로 흐르는 전류가 작아지게 되어 조명등(33)의 조도가 감소하게 된다. 이때 광증폭부(50)의 포토 트랜지스터(51)에서 빛에 의한 전류가 만들어지고, 이 얻어진 전류는 증폭기(53)에서 전류증폭이 이루어지며, 증폭된 전류는 다시 조명등 구동회로부(40)의 트랜지스터(41)를 작동시켜 조명등(23) 쪽으로 흘러 들어가게 된다. 결국 증폭된 전류의 유입에 의해 전류의 감소 없이 조명등(23)을 구동함으로써 종래의 감광기능을 해제시킬 수 있다.In the circuit, when the tail light switch 16 is operated, current flows through the internal diode 43 of the lamp driving circuit 40 to the resistor 45, and the current is reduced by the resistor 45, thereby eventually turning the lamp ( The current flowing to 33 becomes small, so that the illuminance of the lamp 33 is reduced. At this time, the current by the light is made in the photo transistor 51 of the optical amplifier 50, this current is amplified in the amplifier 53, the amplified current is a transistor of the lamp driving circuit unit 40 again Actuate 41 to flow into the lamp (23). As a result, the conventional photosensitive function can be released by driving the lamp 23 without reducing the current by the inflow of the amplified current.

한편, 광증폭부(50)에서 발생된 전류의 일부는 트랜지스터(41)(소스 측)를 거쳐 그라운드로 흐르게 되는데, 이는 조명등(33)이 위치한 방향으로 흐르는 전류는 조명등 구동회로부(40)의 다이오드(43)를 거쳐 저항(45)으로 흐르지 못하기 때문이다.On the other hand, a part of the current generated in the optical amplifier 50 flows to the ground via the transistor 41 (source side), which is the current flowing in the direction in which the lamp 33 is located diode of the lamp driving circuit unit 40 This is because it cannot flow through the 43 to the resistor 45.

이상에서 설명한 바와 같이, 본 발명에 따른 자동차용 디지털시계 조명 제어장치는 조명등 구동회로부에 포토 트랜지스터를 이용한 전류 증폭부를 부가한 감광 차단회로를 구비하여, 미등 점등시 주간에도 디스플레이의 조도가 감광되지 않아 디지털시계의 시인성을 향상시킬 수 있다.As described above, the automotive digital clock lighting control apparatus according to the present invention includes a photosensitive circuit that adds a current amplifier using a photo transistor to a lamp driving circuit, so that the illumination of the display is not dimmed even during daylighting. The visibility of the digital clock can be improved.

Claims (2)

자동차용 디지털시계에 있어서,In the car digital clock, 포토 트랜지스터를 이용한 광증폭부를 시계 조명등과 연결되는 조명등 구동회로에 부가하여 이루어지는 감광 차단회로를 구비하여, 미등 스위치의 작동시 시계의 디스플레이의 조도가 감소하지 않도록 것을 특징으로 하는 자동차용 디지털시계 조명 제어장치.A photosensitive circuit is formed by adding an optical amplifier using a photo transistor to a lamp driving circuit connected to a clock lamp, so that the illumination of the display of the clock is not reduced when the tail light switch is operated. Device. 제 1 항에 있어서,The method of claim 1, 상기 광증폭부는 빛에 의해 전류를 만들어 내는 포토 트랜지스터와 상기 포토 트랜지스터에서 생성된 전류를 증폭시키는 전류 증폭기로 구성되는 것을 특징으로 하는 자동차용 디지털시계 조명 제어장치.And the optical amplifier comprises a photo transistor for generating a current by light and a current amplifier for amplifying the current generated by the photo transistor.
KR10-2003-0037854A 2003-06-12 2003-06-12 Device for controlling illumination degree of car digital clock KR100527937B1 (en)

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KR100527937B1 KR100527937B1 (en) 2005-11-09

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Publication number Priority date Publication date Assignee Title
JPS59114137A (en) * 1982-12-17 1984-07-02 Fuji Heavy Ind Ltd Lamp control device for vehicle
JP3063490B2 (en) * 1993-10-26 2000-07-12 トヨタ自動車株式会社 Light control device for in-vehicle display device
JPH07186828A (en) * 1993-12-27 1995-07-25 Nippon Climate Syst:Kk Lighting control method for panel display unit
JPH10309984A (en) * 1997-05-12 1998-11-24 Zanavy Informatics:Kk Display controller for on-vehicle apparatus and on-vehicle acoustic device

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