JPH0332435Y2 - - Google Patents
Info
- Publication number
- JPH0332435Y2 JPH0332435Y2 JP1940487U JP1940487U JPH0332435Y2 JP H0332435 Y2 JPH0332435 Y2 JP H0332435Y2 JP 1940487 U JP1940487 U JP 1940487U JP 1940487 U JP1940487 U JP 1940487U JP H0332435 Y2 JPH0332435 Y2 JP H0332435Y2
- Authority
- JP
- Japan
- Prior art keywords
- disconnection
- lamp
- power supply
- light
- supply circuit
- 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
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、リアコンビネーシヨンランプやフロ
ントコンビネーシヨンランプ等、多灯式車両用灯
具の点灯制御回路に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lighting control circuit for a multi-light vehicle lamp such as a rear combination lamp and a front combination lamp.
多灯式車両用灯具、例えば２灯式のテール兼ス
トツプランプには、１灯が切れても必要な最低光
度を満足しなければならない規格がある。例えば
ストツプランプでは、１灯でも40cdの最低光度
とし、正常時には２灯で80cd以上の光度とする。
但し、２灯点灯時に最大光度（140cd）以下にす
る。
BACKGROUND ART There are standards for multi-lamp vehicle lights, such as two-lamp tail and stop lamps, that require a minimum luminous intensity even if one lamp burns out. For example, with a Stotsu lamp, the minimum luminous intensity is 40 cd for one lamp, and the luminous intensity for two lamps is 80 cd or more during normal conditions.
However, the luminous intensity should be below the maximum intensity (140 cd) when both lights are on.
ところで、１灯でも最低光度を保持するために
は、最低値に対するマージンを考慮するが、最大
光度を越えないようにしなければならず、ランプ
個々の性能のバラツキが少なくなるように厳しく
管理する必要がある。例えば、40（cd）×1.75（倍）
×２（灯）＝140（cd）となり、１灯に対するマー
ジンを1.75以上とすることはできない。
By the way, in order to maintain the minimum luminous intensity for even one lamp, the margin for the minimum value must be considered, but it must be ensured that the maximum luminous intensity is not exceeded, and it must be strictly controlled to reduce variations in the performance of individual lamps. There is. For example, 40 (cd) x 1.75 (times)
×2 (lights) = 140 (cd), and the margin for one light cannot be greater than 1.75.
また、１灯が断線した時、80cdから40cdとな
つて明るさが大きく変化するので、安全上好まし
くない。 Also, when one light is disconnected, the brightness changes greatly from 80 cd to 40 cd, which is not desirable from a safety standpoint.
本考案は、多灯式車両用灯具の断線による電流
変化を検出する断線検出器と、電圧調整機能を備
えた電源回路とを備え、前記断線検出器による断
線検出時に前記電源回路の出力電圧を増加させる
ようにしたことを特徴とするものである。
The present invention includes a disconnection detector for detecting current changes due to disconnection of a multi-light vehicle lamp, and a power supply circuit equipped with a voltage adjustment function, and the output voltage of the power supply circuit is adjusted when the disconnection detector detects a disconnection. This feature is characterized in that the amount of energy is increased.
第１図は本考案の一実施例を示すもので、１は
電球１Ａ，１Ｂを有するストツプランプ、２は断
線による電流変化を検出してTTLレベルの信号
を生じる断線検出器、３はストツプスイツチ、４
はバツテリー、５は電源回路である。この電源回
路５としては、スイツチングレギレータ方式によ
るDC−DCコンバータなどの電圧調整機能を有す
るものを用いる。
FIG. 1 shows an embodiment of the present invention, in which 1 is a stop lamp having light bulbs 1A and 1B, 2 is a disconnection detector that detects current changes due to disconnection and generates a TTL level signal, 3 is a stop switch, and 4
is a battery, and 5 is a power supply circuit. As this power supply circuit 5, one having a voltage adjustment function, such as a DC-DC converter using a switching regulator system, is used.
前記断線検出器２は、断線検出時に電圧調整信
号を前記電源回路５に付与し、電源回路５の出力
電圧をランプ１の正常時よりも高い電圧（例えば
正常時に10Vであつたならば、１灯点灯時には
13.5V）とするようにしている。 The disconnection detector 2 applies a voltage adjustment signal to the power supply circuit 5 when detecting a disconnection, and changes the output voltage of the power supply circuit 5 to a voltage higher than the normal state of the lamp 1 (for example, if it is 10 V during normal operation, 1 When the lights are on
13.5V).
このような制御動作で、常時は、ランプ１は２
灯点灯で所要の明るさとなる。１灯断線時には電
圧調整により残りの１灯の明るさが増加し、２灯
点灯時の明るさよりは暗くなるが、その差は少な
く、安全性は十分に確保される。 With this control operation, lamp 1 is normally set to 2.
The required brightness is achieved by turning on the lamp. When one light is disconnected, the brightness of the remaining light increases by adjusting the voltage, making it darker than when two lights are on, but the difference is small and safety is sufficiently ensured.
以上のように本考案によれば、多灯式車両用灯
具の１灯断線時に電圧調整を行つて通常よりも高
い電圧となるようにしたので、１灯断線時にも通
常の明るさとの差を少なくすることができ、走行
の安全性確保に寄与できる。また、通常の電圧は
低電圧であるため、寿命が長くなるとともに、耐
熱性の改善が図れる。更に、電圧調整によつて電
球の性能のバラツキを吸収できるため、量産性が
向上する。
As described above, according to the present invention, when one light of a multi-light vehicle light is broken, the voltage is adjusted so that the voltage is higher than normal, so even when one light is broken, the difference from the normal brightness can be maintained. This can contribute to ensuring driving safety. Furthermore, since the normal voltage is low, the lifespan is extended and the heat resistance is improved. Furthermore, since variations in bulb performance can be absorbed by adjusting the voltage, mass productivity is improved.
第１図は本考案に係る車両用灯具の点灯制御回
路の一実施例を示すブロツク図である。
１……２灯式のストツプランプ、２……断線検
出器、３……ストツプスイツチ、４……バツテリ
ー、５……電源回路。
FIG. 1 is a block diagram showing an embodiment of a lighting control circuit for a vehicle lamp according to the present invention. 1... Two-light stop lamp, 2... Disconnection detector, 3... Stop switch, 4... Battery, 5... Power supply circuit.
Claims (1)
する断線検出器と、電圧調整機能を備えた電源回
路とを備え、前記断線検出器による断線検出時に
前記電源回路の出力電圧を増加させるようにした
ことを特徴とする車両用灯具の点灯制御回路。 A disconnection detector for detecting a current change due to a disconnection of a multi-light vehicle lamp, and a power supply circuit having a voltage adjustment function, and configured to increase the output voltage of the power supply circuit when the disconnection detector detects a disconnection. A lighting control circuit for a vehicle lamp, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1940487U JPH0332435Y2 (en) | 1987-02-12 | 1987-02-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1940487U JPH0332435Y2 (en) | 1987-02-12 | 1987-02-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63126140U JPS63126140U (en) | 1988-08-17 |
| JPH0332435Y2 true JPH0332435Y2 (en) | 1991-07-10 |
Family
ID=30813973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1940487U Expired JPH0332435Y2 (en) | 1987-02-12 | 1987-02-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0332435Y2 (en) |
-
1987
- 1987-02-12 JP JP1940487U patent/JPH0332435Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63126140U (en) | 1988-08-17 |
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