JPS585085U - Vehicle light emitting diode display circuit - Google Patents
Vehicle light emitting diode display circuitInfo
- Publication number
- JPS585085U JPS585085U JP1981097500U JP9750081U JPS585085U JP S585085 U JPS585085 U JP S585085U JP 1981097500 U JP1981097500 U JP 1981097500U JP 9750081 U JP9750081 U JP 9750081U JP S585085 U JPS585085 U JP S585085U
- Authority
- JP
- Japan
- Prior art keywords
- emitting diode
- light emitting
- transistor
- temperature
- turned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Audible And Visible Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案に係る車両の発光ダイオード表示回路の回路
図である。
各図中同一部材には同一符号を付し、１２・・・発光ダ
イオード、１４・・・温度補償回路、２４・・・感温抵
抗素子、２６・・・トランジスタ、２８・・・抵抗素子
、３４・・・リレースイッチ、３８・・・テールランプ
スイッチ、Ｉ２・・・駆動電流、Ｉ３・・・底値駆動電
流。The figure is a circuit diagram of a light emitting diode display circuit for a vehicle according to the present invention. The same members in each figure are designated by the same reference numerals, and 12...Light emitting diode, 14...Temperature compensation circuit, 24...Temperature sensitive resistance element, 26...Transistor, 28...Resistance element, 34... Relay switch, 38... Tail lamp switch, I2... Drive current, I3... Bottom value drive current.
Claims (2)
発光ダイオードと、該発光ダイオードに供給される駆動
電流を温度によって制御する温度補償回路とを含み、温
度補償回路は、温度によって抵抗値が変化する感温抵抗
素子と、発光ダイオードに駆動電流を供給し感温抵抗素
子の抵抗値の変化によって導通度が変化するトランジス
タと、トランジスタに並列接続され発光ダイオードに底
値軸動電流を供給する抵抗素子とを有し、発光ダイオー
ドに流れる駆動電流を温度によって制御して輝度をほぼ
一定にするとともに温度が極端に上昇してトランジスタ
がオフした時に底値駆動電流を供給することを特徴とす
る車両の発光ダイオード表示−路。(1) The temperature compensation circuit includes a light emitting diode that is installed in the vehicle interior and displays a predetermined function of the vehicle, and a temperature compensation circuit that controls the drive current supplied to the light emitting diode according to the temperature. A temperature-sensitive resistance element whose resistance value changes, a transistor that supplies drive current to the light-emitting diode and whose conductivity changes according to changes in the resistance value of the temperature-sensitive resistance element, and a transistor that is connected in parallel with the transistor and supplies a bottom-axis dynamic current to the light-emitting diode. The device has a resistor element that supplies the light emitting diode, and controls the drive current flowing through the light emitting diode depending on the temperature to keep the brightness almost constant, and also supplies the bottom drive current when the temperature rises extremely and the transistor is turned off. Vehicle light emitting diode display - road.
て、温度補償回路内のトランジスタと並列接続され夜間
走行時にオン作動されるスイッチを有し、該スイッチの
オン時にトランジスタがオフとなり抵抗素子から発光ダ
イオードに底値駆動電流を供給して発光ダイオードの輝
度を低下させることを特徴とする車両の発光ダイオード
表示回路。(2) Utility model registration The circuit described in claim (1) has a switch that is connected in parallel with the transistor in the temperature compensation circuit and is turned on when driving at night, and when the switch is turned on, the transistor is turned off and the resistive element is turned on. A light emitting diode display circuit for a vehicle, characterized in that the luminance of the light emitting diode is reduced by supplying a bottom value driving current to the light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981097500U JPS585085U (en) | 1981-06-30 | 1981-06-30 | Vehicle light emitting diode display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981097500U JPS585085U (en) | 1981-06-30 | 1981-06-30 | Vehicle light emitting diode display circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS585085U true JPS585085U (en) | 1983-01-13 |
| JPS6319902Y2 JPS6319902Y2 (en) | 1988-06-02 |
Family
ID=29892303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981097500U Granted JPS585085U (en) | 1981-06-30 | 1981-06-30 | Vehicle light emitting diode display circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS585085U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010283395A (en) * | 2008-08-06 | 2010-12-16 | Sharp Corp | Led drive circuit |
| JP2011009474A (en) * | 2009-06-25 | 2011-01-13 | Panasonic Electric Works Co Ltd | Light emitting diode driving apparatus, and luminaire, lighting device for vehicle interiors and lighting device for vehicles employing the same |
| JP2013062462A (en) * | 2011-09-15 | 2013-04-04 | Mitsubishi Electric Lighting Corp | Constant current circuit and light-emitting diode driving constant current circuit |
| JP2016106418A (en) * | 2016-02-02 | 2016-06-16 | 三菱電機照明株式会社 | Constant current circuit and light-emitting diode driving constant current circuit |
-
1981
- 1981-06-30 JP JP1981097500U patent/JPS585085U/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010283395A (en) * | 2008-08-06 | 2010-12-16 | Sharp Corp | Led drive circuit |
| JP2011009474A (en) * | 2009-06-25 | 2011-01-13 | Panasonic Electric Works Co Ltd | Light emitting diode driving apparatus, and luminaire, lighting device for vehicle interiors and lighting device for vehicles employing the same |
| JP2013062462A (en) * | 2011-09-15 | 2013-04-04 | Mitsubishi Electric Lighting Corp | Constant current circuit and light-emitting diode driving constant current circuit |
| JP2016106418A (en) * | 2016-02-02 | 2016-06-16 | 三菱電機照明株式会社 | Constant current circuit and light-emitting diode driving constant current circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6319902Y2 (en) | 1988-06-02 |
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