JPS5928037B2 - light bulb drive device - Google Patents
light bulb drive deviceInfo
- Publication number
- JPS5928037B2 JPS5928037B2 JP57148601A JP14860182A JPS5928037B2 JP S5928037 B2 JPS5928037 B2 JP S5928037B2 JP 57148601 A JP57148601 A JP 57148601A JP 14860182 A JP14860182 A JP 14860182A JP S5928037 B2 JPS5928037 B2 JP S5928037B2
- Authority
- JP
- Japan
- Prior art keywords
- light bulb
- voltage
- switch
- resistor
- power source
- 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.)
- Expired
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
【発明の詳細な説明】
本発明は電源電圧と異る電球を点灯させろための電球駆
動装置に関するものであろ。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light bulb driving device for lighting a light bulb that differs from the power supply voltage.
この種の電球駆動装置として、第１図に示した回路構成
のものが知られていろ。As a light bulb driving device of this type, one having a circuit configuration shown in FIG. 1 is known.
この駆動装置において、Ｅは電源であり、該電源電圧と
異ろ電球Ｌｉ、Ｌ２・・・・・・を点灯させろスイッチ
ＳＷＩ、ＳＷ２・・・・・・が設けられ、該スイッチと
電源との間に、電球に対応する電圧に降圧させると共に
電流制限用の抵抗Ｒ１が接続されていろ。このような回
路構成であろと、スイッチＳＷＩを投入して電球Ｌ４を
点灯させろと、抵抗Ｒ、の電流制限により電球の端子に
掛ろ電圧の立上りが遅く、電球フィラメントの赤熱が遅
くなつてすぐには所定の明ろさにならない。In this drive device, E is a power source, and switches SWI, SW2, etc. are provided to light up the light bulbs Li, L2, etc., which differ from the power source voltage, and the switches and the power source are connected to each other. In between, a resistor R1 is connected to lower the voltage to a voltage corresponding to the light bulb and to limit the current. With this kind of circuit configuration, when you turn on the switch SWI to light up the bulb L4, the voltage applied to the terminals of the bulb will rise slowly due to the current limit of the resistor R, and the red heat of the bulb filament will slow down. The brightness will not reach the specified brightness.
この状況を第２図のグラフに示してある。このグラフに
おいて、りは電球の両端電圧であり、をはスイッチＳＷ
Ｉ、ＳＷ２・・・・・・の投入後の時間（ミリセコンド
）であり、スイッチを投入すると抵抗Ｒ１がゆつくり立
上つて安定した電圧及び電流を流すようになろまで相当
な時間がかかり、これが電球の点灯において正常な明ろ
さになろまで時間を遅らせろことになり、これを表示装
置、特に自動車用の計器類で、切替頻度の激しい、例え
ばオートマチソククラッチ等の表示に使用すると、速か
な表示が要求されろにも拘らず、それができないと云う
欠ウがある。本発明はこれらの欠点を除去するためにな
されたものであつて、その目的はスイッチ切替えにおい
て点灯する電球が速かな立上りで正常な明るさになる電
球駆動装置を提供しようとするものである。この目的を
達成するためになされた本発明は、電源と電源電圧以下
の電球との間にスイッチを設け、前記電源とスイッチと
の間に前記電球の電圧に合せた電流制限用の抵抗を設け
た電球、駆動装置において、前記電流制限用の抵抗と並
列にゼナーダイオードと該ゼナーダイオードの保護用小
抵抗を設けたことを特徴とする電球、駆動装置であつて
、電流制限用の抵抗と並列に設けたゼナーダイオードの
存在により、スイッチ投入後に直ちにゼナーダイオード
を介して、立上りの急峻な一定の電圧電流が電球に速か
に流れて、遅れろことなく正常な点灯が行えろのである
。This situation is illustrated in the graph of FIG. In this graph, ri is the voltage across the bulb, and is the switch SW
This is the time (milliseconds) after turning on I, SW2..., and when the switch is turned on, it takes a considerable amount of time until the resistor R1 slowly rises and a stable voltage and current are flowing. This means that the time required to turn on the light bulb is delayed until it reaches normal brightness, and if this is used in display devices, especially in automobile instruments, where the switching frequency is high, such as automatic clutches, etc. Although fast display is required, there is a drawback that it is not possible. The present invention has been made to eliminate these drawbacks, and its purpose is to provide a light bulb drive device that allows the light bulb to quickly rise to normal brightness when the switch is changed. The present invention, which was made to achieve this object, provides a switch between a power source and a light bulb whose voltage is lower than the power source voltage, and a current-limiting resistor that matches the voltage of the light bulb between the power source and the switch. A light bulb and a drive device, characterized in that a zener diode and a small resistor for protecting the zener diode are provided in parallel with the current-limiting resistor. Due to the presence of the Zener diode installed in parallel with the LED, a constant voltage current with a steep rise rapidly flows through the Zener diode to the bulb immediately after the switch is turned on, allowing normal lighting without delay. It is.
そして、その後はゆつくり立上つて来た電流制限用の抵
抗を介して点灯をし続けろのであろ。次に本発明を図示
の実施例により更に詳しく説明すると、第３図において
、Ｅは電源、Ｒ３は電流制限用の抵抗であり、前記電源
ＥとスイッチＳＷＩ、ＳＷ２・・・・・・との間に設け
、これらスイッチを介して電球Ｌｉ、Ｌ２・・・・・・
が接続されていろ。After that, the light would continue to be lit via the current-limiting resistor, which slowly rose. Next, the present invention will be explained in more detail with reference to the illustrated embodiment. In FIG. 3, E is a power source, R3 is a current limiting resistor, and the power source E and switches SWI, SW2, . . . Light bulbs Li, L2...
be connected.
このような回路構成において、電流制限用の抵抗Ｒ１と
並列にゼナーダイオードＺＤと小抵抗Ｒ２とを接続させ
る。前記電源Ｅｆ）電圧と電球Ｌ］，Ｌ２・−・・・・
の電圧とは異なり、例えば電源Ｅは１２Ｖであり電球Ｌ
，，Ｌ２・・・・・・は６Ｖであるとすると、これらの
差の電圧分を抵抗Ｒ１で落して電球側に印加させるので
ある。In such a circuit configuration, a zener diode ZD and a small resistor R2 are connected in parallel with the current limiting resistor R1. Said power source Ef) voltage and light bulb L], L2...
For example, power source E is 12V, and light bulb L
, , L2 .
又小抵抗Ｒ２はゼナーダイオードの保護用である。この
ような回路構成において、例えばスイツチＳＷ，をオン
させると、電源Ｅからの電流は、まず小抵抗Ｒ２→ゼナ
ーダイオードＺＤ→スイツチＳＷ，を介して電球Ｌ，Ｖ
Ｃ，流れ、電球Ｌｌが点灯する。Also, the small resistor R2 is for protection of the Zener diode. In such a circuit configuration, for example, when the switch SW is turned on, the current from the power source E first passes through the small resistor R2 → Zener diode ZD → switch SW, and then flows into the light bulbs L and V.
C. Flow, the light bulb Ll lights up.
これは小抵抗Ｒ２が抵抗Ｒ１に比べて充分小さいので、
電流はゼナーダィオードの特性のみにより急峻に流れる
。この状態は第４図のグラフに示す通りである。このグ
ラフにおいてＶは電球の両端電圧であり、ｔはスイツチ
ＳＷｌ，ＳＷ２・・・・・・の投入後ｑ寺間（ミリセコ
ンド）である。スイツチＳＷｌの投入後、ゼナーダィオ
ードＺＤの特性により電流が定格以下にならずに急峻に
流れるために、電球Ｌ，は直ちに通常点灯状態になり、
その後ゆつくり立上つて来た抵抗Ｒ，の方から電流が流
れて通常点灯状態が安定する。要するに、抵抗Ｒ１のみ
であると、スイツチ投入直後は電球側に流れる電流が比
較的大きな抵抗Ｒ１の存在によつて一時的に定格電流以
下になり、そのために立上りが遅くなるのである。従つ
て、ゼナーダイオードを並列に設けることにより、スイ
ツチ投入と同時に電源からの電流が定格電流以下になら
ないで電球側に流れるので、通常点灯の立上りが著しく
短縮され、速かな点灯が望めるのである。以上説明した
ように本発明に係る亀球１駆動装置は、電源電王と異る
電球を点灯させる場合に用いられるものであり、電源電
圧を電球に対応する電圧に降圧させろと共に電流を制限
するための抵抗と並列にゼナーダイオードと保護用小抵
抗とを設けたものであり、スイツチの頻繁な切替えがあ
つても、ゼナーダイオードの特性によつて定格電流が直
ち【電球に流れ、急峻な立上りが望めるので、スイツチ
の切替えと同時に所定の明るさに点灯でき、表示装置用
光源の電球駆動装置として優れた効果を奏するのである
。This is because the small resistance R2 is sufficiently smaller than the resistance R1.
The current flows steeply due to the characteristics of the Zener diode. This state is as shown in the graph of FIG. In this graph, V is the voltage across the bulb, and t is q seconds (milliseconds) after the switches SW1, SW2, . . . are turned on. After the switch SWl is turned on, the current flows steeply without dropping below the rated value due to the characteristics of the Zener diode ZD, so the bulb L immediately returns to the normal lighting state.
After that, current flows from the resistor R, which slowly rises, and the normal lighting condition is stabilized. In short, if only the resistor R1 is used, immediately after the switch is turned on, the current flowing to the bulb side will temporarily become less than the rated current due to the presence of the relatively large resistor R1, which will slow down the rise. Therefore, by installing zener diodes in parallel, the current from the power supply will flow to the bulb side at the same time as the switch is turned on without dropping below the rated current, which will significantly shorten the normal startup time and allow for faster lighting. . As explained above, the turtle bulb 1 driving device according to the present invention is used when lighting a light bulb different from the power supply voltage, and is used to reduce the power supply voltage to a voltage corresponding to the light bulb and to limit the current. A zener diode and a small protective resistor are installed in parallel with the resistor. Since a bright start-up can be expected, the lamp can be turned on at a predetermined brightness at the same time as the switch is turned on, and it has an excellent effect as a light bulb driving device for a light source for a display device.
第１図は電球駆動装置の従来例の略示的回路図、第２図
は同従来例におけるスイツチ投入後の電圧の立上り状態
を示すグラフ、第３図は本発明に係る電球駆動装置の略
示的回路図、第４図は同装置におけるスイツチ投入後の
電圧の立上り状態を示すグラフである。
Ｅ・・・電源、ＳＷｌ，ＳＷ２・・・スイツチ、Ｌｌ，
Ｌ２・・・電球、Ｒ１・・・電流制限用の抵抗、Ｒ２・
・・保護用の抵抗、ＺＤ・・・ゼナーダイオード。Fig. 1 is a schematic circuit diagram of a conventional example of a light bulb driving device, Fig. 2 is a graph showing a voltage rise state after turning on a switch in the conventional example, and Fig. 3 is a schematic diagram of a light bulb driving device according to the present invention. The schematic circuit diagram, FIG. 4, is a graph showing the voltage rise state after the switch is turned on in the same device. E...Power supply, SWl, SW2...Switch, Ll,
L2... Light bulb, R1... Resistor for current limiting, R2.
...Protective resistor, ZD... Zener diode.
Claims (1)
、前記電源とスイッチとの間に前記電球の電圧に合せた
電流制限用の抵抗を設けた電球駆動装置において、前記
電流制限用の抵抗と並列にゼナーダイオードと該ゼナー
ダイオードの保護用小抵抗を設けたことを特徴とする電
球駆動装置。1. In a light bulb drive device in which a switch is provided between a power source and a light bulb whose voltage is lower than the power source voltage, and a current limiting resistor is provided between the power source and the switch in accordance with the voltage of the light bulb, the current limiting resistor A light bulb driving device characterized in that a zener diode and a small resistor for protecting the zener diode are provided in parallel with the zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57148601A JPS5928037B2 (en) | 1982-08-27 | 1982-08-27 | light bulb drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57148601A JPS5928037B2 (en) | 1982-08-27 | 1982-08-27 | light bulb drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5940493A JPS5940493A (en) | 1984-03-06 |
| JPS5928037B2 true JPS5928037B2 (en) | 1984-07-10 |
Family
ID=15456408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57148601A Expired JPS5928037B2 (en) | 1982-08-27 | 1982-08-27 | light bulb drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5928037B2 (en) |
-
1982
- 1982-08-27 JP JP57148601A patent/JPS5928037B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5940493A (en) | 1984-03-06 |
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