KR920003492Y1 - A circuit regulating a lcd lamp in a radio of a car stereo - Google Patents
A circuit regulating a lcd lamp in a radio of a car stereo Download PDFInfo
- Publication number
- KR920003492Y1 KR920003492Y1 KR2019890016674U KR890016674U KR920003492Y1 KR 920003492 Y1 KR920003492 Y1 KR 920003492Y1 KR 2019890016674 U KR2019890016674 U KR 2019890016674U KR 890016674 U KR890016674 U KR 890016674U KR 920003492 Y1 KR920003492 Y1 KR 920003492Y1
- Authority
- KR
- South Korea
- Prior art keywords
- transistor
- radio
- car stereo
- diode
- circuit regulating
- Prior art date
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Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
- G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 구성도.1 is a block diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
TR1, TR2 : 트랜지스터 D1 : 제너다이오드TR1, TR2: Transistor D1: Zener Diode
D2 : 다이오드 R1-R4 : 저항D2: Diode R1-R4: Resistance
본 고안은 카스테레오 라디오의 LCD 조명 조절 회로에 관한 것이다.The present invention relates to an LCD lighting control circuit of a car stereo radio.
자동차의 스테레오 라디오의 LCD는 라디오의 동작 상태를 나타내는데 낮에는 LCD 조명이 밝지 않으면 잘 알아볼 수 없으며 또한 야간에는 너무 밝아 운전자의 눈을 자극하여 눈의 피로를 가져와 운전하는데 지장을 초래하는 문제점이 있었다.The LCD of the car's stereo radio shows the operating state of the radio. If the LCD light is not bright during the day, it is hard to recognize. Also, at night, it is too bright to stimulate the driver's eyes.
본 고안은 상기 문제점을 해결하기 위한 것으로 자동차의 야간 조명용 전원을 이용하여 LCD 조명을 조절할 수 있도록 한 LCD 조명 조절 회로를 제공하는데 있다.The present invention is to solve the above problems to provide an LCD lighting control circuit that can adjust the LCD lighting by using a night light power supply of the vehicle.
본 고안은 상기목적을 달성하기 위해 전원에 연결된 제1트랜지스터, 야간 조명용 전원에 연결된 제2트랜지스터, 상기 제1 트랜지스터에 연결된 제너다이오드, 및 상기 제너다이오드에 연결된 다이오드로 구성되어 상기 제너다이오드와 다이오드간에 상기 제2 트랜지스터를 연결한 것을 특징으로 하고 있다.The present invention comprises a first transistor connected to a power source, a second transistor connected to a night light power supply, a zener diode connected to the first transistor, and a diode connected to the zener diode to achieve the above object. The second transistor is connected.
이하 첨부된 도면을 참조하여 본 고안의 일실시예를 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 고안의 구성도로서, TR1, TR2는 트랜지스터를, D1은 제너 다이오드를, D2는 다이오드를, R1 내지 R4는 저항을 각각 나타낸다.1 is a schematic diagram of the present invention, where TR1 and TR2 represent a transistor, D1 represents a zener diode, D2 represents a diode, and R1 to R4 represent a resistance.
도면에서 야간 조명용 전원이 나오지 않을 경우 저항(R1, R2)과 트랜지스터(TR1)를 통해 전원이 인가되며 트랜지스터(TR1)의 베이스 전위는 다이오드(D2)에 의한 전압강하 전압, 즉 A점의 전위에 제너다이오드(D1)의 제너 전압의 합이 되며 최종적으로 램프 양단에 인가되는 전압은 트랜지스터(TR1)의 베이스 전위에 트랜지스터(TR1)의 베이스-에미터간의 전압강하를 뺀 전압이 인가된다.In the drawing, when the power for night illumination does not come out, power is applied through the resistors R1 and R2 and the transistor TR1, and the base potential of the transistor TR1 is applied to the voltage drop voltage of the diode D2, that is, the potential of the point A. The sum of the zener voltages of the zener diodes D1 and finally the voltage applied across the lamp is applied to the base potential of the transistor TR1 minus the voltage drop of the base-emitter of the transistor TR1.
야간 조명용 전원이 나올 경우 저항(R4, R3)과 트랜지스터(TR2)를 통해 야간 조명용 전원이 인가되며 트랜지스터(TR2)의 스위칭 동작으로 A점의 전위가 0전위가 되면 트랜지스터(TR1) 및 저항(R1, R2)으로 전원이 인가된다.When the power for night illumination comes out, the power for night illumination is applied through the resistors R4 and R3 and the transistor TR2. When the potential of the point A becomes zero due to the switching operation of the transistor TR2, the transistor TR1 and the resistor R1 , R2).
그리고 최종으로 램프 양단에 인가되는 전압은 트랜지스터(TR1)의 베이스 전위, 즉 제너 다이오드(D1)의 제너 전압에서 트랜지스터(TR1)의 베이스-에미터간 전압강하를 뺀 전압이 인가된다.Finally, the voltage applied across the lamp is applied to the base potential of the transistor TR1, that is, the voltage obtained by subtracting the voltage drop between the base-emitter of the transistor TR1 from the zener voltage of the zener diode D1.
상기와 같이 야간 조명용 전원이 나오고 나오지 않음에 따라 램프에 인가되는 전압이 다이오드(D2)의 전압강하 전압만큼 변동하며 따라서 램프도 밝기가 변함을 알수 있다.As described above, as the power for the night light is turned on and off, the voltage applied to the lamp is changed by the voltage drop voltage of the diode D2, and thus the brightness of the lamp is also changed.
본 고안은 상기와 같이 구성되어 LCD 조명을 알맞게 조절할 수 있도록 하였다.The present invention is configured as described above to adjust the LCD lighting accordingly.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890016674U KR920003492Y1 (en) | 1989-11-11 | 1989-11-11 | A circuit regulating a lcd lamp in a radio of a car stereo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890016674U KR920003492Y1 (en) | 1989-11-11 | 1989-11-11 | A circuit regulating a lcd lamp in a radio of a car stereo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910009676U KR910009676U (en) | 1991-06-29 |
| KR920003492Y1 true KR920003492Y1 (en) | 1992-05-30 |
Family
ID=19291743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890016674U KR920003492Y1 (en) | 1989-11-11 | 1989-11-11 | A circuit regulating a lcd lamp in a radio of a car stereo |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR920003492Y1 (en) |
-
1989
- 1989-11-11 KR KR2019890016674U patent/KR920003492Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR910009676U (en) | 1991-06-29 |
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