JPH0553255U - Light emitting element drive circuit - Google Patents
Light emitting element drive circuitInfo
- Publication number
- JPH0553255U JPH0553255U JP10436391U JP10436391U JPH0553255U JP H0553255 U JPH0553255 U JP H0553255U JP 10436391 U JP10436391 U JP 10436391U JP 10436391 U JP10436391 U JP 10436391U JP H0553255 U JPH0553255 U JP H0553255U
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- current
- light emitting
- power supply
- emitting element
- 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.)
- Pending
Links
Abstract
(57)【要約】
【目的】 発光素子を点灯する際の直流電源からの供給
電流を少なくして、消費電力を減少させる。
【構成】 ＬＥＤ１にスイッチング素子２と第１の抵抗
素子３とを経由して並列接続されたコンデンサ４と、コ
ンデンサ４と第１の抵抗素子３との接続点に第２の抵抗
素子５を経由してコンデンサ４の充電電流及びＬＥＤ１
の駆動電流を供給する直流電源６を接続して、スイッチ
ング素子２のオン期間はコンデンサ４からの放電電流と
直流電源６からの駆動電流の合成電流でＬＥＤ１を点灯
し、オフ期間にコンデンサ４を充電する。
【効果】 コンデンサからの放電電流に相当する分、直
流電源からの駆動電流を少なくでき、さらにオフ期間に
コンデンサを充電することにより供給電流の平均化と消
費電力の低減が可能となる。
(57) [Abstract] [Purpose] To reduce power consumption by reducing the current supplied from the DC power supply when lighting the light emitting element. [Configuration] A capacitor 4 connected in parallel to the LED 1 via a switching element 2 and a first resistance element 3, and a second resistance element 5 at a connection point between the capacitor 4 and the first resistance element 3. Then, the charging current of the capacitor 4 and the LED 1
The DC power supply 6 for supplying the driving current is connected, the LED 1 is lit by the combined current of the discharge current from the capacitor 4 and the driving current from the DC power supply 6 during the ON period of the switching element 2, and the capacitor 4 is switched on during the OFF period. To charge. [Effect] The drive current from the DC power supply can be reduced by an amount corresponding to the discharge current from the capacitor, and further, by charging the capacitor during the off period, it becomes possible to average the supply current and reduce the power consumption.
Description
【０００１】[0001]
本考案は発光素子の点滅によって、何らかの情報を表示する発光素子駆動回路 に関し、特に小型化が要求される車載ユニットに搭載する発光素子駆動回路に関 する。 The present invention relates to a light emitting element driving circuit that displays some information by blinking a light emitting element, and more particularly to a light emitting element driving circuit mounted in an on-vehicle unit that is required to be downsized.
【０００２】[0002]
ＬＥＤなどの発光素子は、抵抗を介して順方向電流を流すと発光するが、連続 して発光させるときと断続的に発光させるときで必要な電流供給量は同じである 。 A light emitting element such as an LED emits light when a forward current is passed through a resistor, but the required current supply amount is the same for continuous light emission and intermittent light emission.
【０００３】[0003]
ＬＥＤを連続して発光させる時と断続して発光させる場合では、必要なエネル ギー量は異なる。ところが、直流電源にとって、供給するべき電流は発光光度を 同じにする前に、同量必要であり、結果的に断続的に発光させて使用する場合も 連続して発光させる場合も同じ規模の電源が必要となる。 The amount of energy required differs depending on whether the LED emits light continuously or intermittently. However, for a DC power supply, the same amount of current must be supplied before making the luminous intensity the same. Is required.
【０００４】 本考案の目的は、断続して発光する場合に、直流電源が供給する電流を平均化 し、消費電流を削減することにある。An object of the present invention is to reduce the current consumption by averaging the currents supplied by the DC power supply when emitting light intermittently.
【０００５】[0005]
従って、本考案は上述の目的を達成するために、発光素子と、この発光素子に スイッチング素子と第１の抵抗素子とからなる直列回路を介して並列接続された コンデンサと、このコンデンサと第１の抵抗素子との接続点に接続された第２の 抵抗素子と、この第２の抵抗素子に接続され、かつコンデンサの充電電流及び発 光素子の駆動電流を供給する直流電源とを備えたものである。 Therefore, in order to achieve the above object, the present invention provides a light emitting device, a capacitor connected in parallel to the light emitting device through a series circuit including a switching device and a first resistance device, and a capacitor and a first capacitor. Having a second resistance element connected to the connection point with the resistance element and a DC power supply connected to the second resistance element and supplying a charging current for the capacitor and a driving current for the light emitting element. Is.
【０００６】[0006]
【実施例】 次に本考案の一実施例について図１を参照して説明する。Embodiment Next, one embodiment of the present invention will be described with reference to FIG.
【０００７】 同図において、発光素子１は、外部制御信号７によってスイッチング素子２が オン・オフ制御され、点燈・消燈する。直流電源６より供給される電流は第１の 抵抗素子３と第２の抵抗素子５の合成抵抗によって決定し、コンデンサ４からの 放電電流は第１の抵抗素子３によって決定する。それらの電流は合流し発光素子 １に供給される。In the figure, in the light emitting element 1, the switching element 2 is on / off controlled by an external control signal 7 to turn on / off the light. The current supplied from the DC power supply 6 is determined by the combined resistance of the first resistance element 3 and the second resistance element 5, and the discharge current from the capacitor 4 is determined by the first resistance element 3. Those currents merge and are supplied to the light emitting element 1.
【０００８】[0008]
以上説明したように本考案によれば、断続的に点燈・消燈を行なう発光素子の 駆動回路の消費電流を削減でき、電源規模を小さくできる。 As described above, according to the present invention, it is possible to reduce the current consumption of the drive circuit of the light emitting element that intermittently turns on and off and to reduce the power supply scale.
【図面の簡単な説明】[Brief description of drawings]
【図１】本考案の一実施例を示す回路構成図である。FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.
１ 発光素子（ＬＥＤ） ２ スイッチング素子 ３ 第１の抵抗素子 ４ コンデンサ ５ 第２の抵抗素子 ６ 直流電源 ７ 外部制御信号 1 Light-Emitting Element (LED) 2 Switching Element 3 First Resistance Element 4 Capacitor 5 Second Resistance Element 6 DC Power Supply 7 External Control Signal
Claims (1)
グ素子と第１の抵抗素子とからなる直列回路を介して並
列接続されたコンデンサと、このコンデンサと第１の抵
抗素子との接続点に接続された第２の抵抗素子と、この
第２の抵抗素子に接続され、かつコンデンサの充電電流
及び発光素子の駆動電流を供給する直流電源とを備えた
ことを特徴とする発光素子駆動回路。1. A light emitting device, a capacitor connected in parallel to the light emitting device through a series circuit including a switching device and a first resistance device, and a connection point between the capacitor and the first resistance device. And a DC power supply that is connected to the second resistance element and that supplies a charging current for the capacitor and a driving current for the light emitting element, the light emitting element drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10436391U JPH0553255U (en) | 1991-12-18 | 1991-12-18 | Light emitting element drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10436391U JPH0553255U (en) | 1991-12-18 | 1991-12-18 | Light emitting element drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0553255U true JPH0553255U (en) | 1993-07-13 |
Family
ID=14378747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10436391U Pending JPH0553255U (en) | 1991-12-18 | 1991-12-18 | Light emitting element drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0553255U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139690A (en) * | 1982-11-27 | 1984-08-10 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Current control component drive circuit |
-
1991
- 1991-12-18 JP JP10436391U patent/JPH0553255U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59139690A (en) * | 1982-11-27 | 1984-08-10 | エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン | Current control component drive circuit |
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