JPS60160245U - Lamp burnout detection circuit - Google Patents
Lamp burnout detection circuitInfo
- Publication number
- JPS60160245U JPS60160245U JP4840884U JP4840884U JPS60160245U JP S60160245 U JPS60160245 U JP S60160245U JP 4840884 U JP4840884 U JP 4840884U JP 4840884 U JP4840884 U JP 4840884U JP S60160245 U JPS60160245 U JP S60160245U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- detection circuit
- power supply
- vehicle
- disconnection detection
- 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】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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来のランプ断線検知回路の一例を示す回路
図、第２図は、この考案によるランプ断線検知回路の一
例を示す回路ブロック図、第３図は、第２図におけるＤ
Ｃ−ＤＣコンバータの一例を ゛示す回路図、第
４図は、この考案の別の実施例を示す回路である。
Ｂ１・・・車輌用直流電源、ｓｗｌ・・・ランプ点灯用
ス、イツチ、ＬＬｌ・・・ランプ、Ｄｌ・・・逆流防止
用ダイオード、ＰＬｌ・・・表示ランプ、２・・・ＤＣ
−ＤＣコンバータ、３・・・スイッチング回路、４・・
・出力端子。FIG. 1 is a circuit diagram showing an example of a conventional lamp breakage detection circuit, FIG. 2 is a circuit block diagram showing an example of a lamp breakage detection circuit according to this invention, and FIG. 3 is a circuit diagram showing an example of a lamp breakage detection circuit according to the present invention.
FIG. 4, a circuit diagram showing an example of a C-DC converter, is a circuit showing another embodiment of this invention. B1...DC power supply for vehicle, swl...Lamp lighting switch, LLl...Lamp, Dl...Diode for backflow prevention, PLl...Indication lamp, 2...DC
-DC converter, 3... switching circuit, 4...
・Output terminal.
Claims (1)
線を検知するとともにこれを表示する車輌用のランプ断
線検知回路において、ランプ点灯用スイッチとランプと
の間に電気的に接続された逆流防止用ダイオ−、ドと、
前記車輌用直流電源により駆動されてその出力電圧より
高い電圧を出力する前記別の直流電源を生成するＤＣ−
ＤＣコンバータと、前記逆流防止用ダイオードとランプ
との接続点と前記ＤＣ−ＤＣコンバータの出力端との間
に接続された抵抗と、前記抵抗の電圧降下によりスイッ
チング作動するスイッチング回路とを備えたランプ断線
検知回路。In a vehicle lamp disconnection detection circuit that uses a separate DC power source in addition to the vehicle DC power supply to detect and display lamp disconnection, a lamp disconnection detection circuit that is electrically connected between the lamp lighting switch and the lamp is used. Backflow prevention diode,
A DC power supply that is driven by the vehicle DC power supply and generates the other DC power supply that outputs a voltage higher than the output voltage of the vehicle DC power supply.
A lamp comprising a DC converter, a resistor connected between a connection point between the backflow prevention diode and the lamp and an output end of the DC-DC converter, and a switching circuit that performs switching operation due to a voltage drop across the resistor. Disconnection detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4840884U JPS60160245U (en) | 1984-04-04 | 1984-04-04 | Lamp burnout detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4840884U JPS60160245U (en) | 1984-04-04 | 1984-04-04 | Lamp burnout detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60160245U true JPS60160245U (en) | 1985-10-24 |
Family
ID=30564633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4840884U Pending JPS60160245U (en) | 1984-04-04 | 1984-04-04 | Lamp burnout detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60160245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161104A (en) * | 2008-01-09 | 2009-07-23 | Autonetworks Technologies Ltd | Load control circuit and battery exhaustion preventive method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911665U (en) * | 1972-05-04 | 1974-01-31 | ||
| JPS55105992A (en) * | 1979-02-07 | 1980-08-14 | Mitsubishi Electric Corp | Lamp driver with disconnection detecting circuit |
| JPS58115797A (en) * | 1981-12-28 | 1983-07-09 | 市光工業株式会社 | Lamp disconnection detecting circuit |
-
1984
- 1984-04-04 JP JP4840884U patent/JPS60160245U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911665U (en) * | 1972-05-04 | 1974-01-31 | ||
| JPS55105992A (en) * | 1979-02-07 | 1980-08-14 | Mitsubishi Electric Corp | Lamp driver with disconnection detecting circuit |
| JPS58115797A (en) * | 1981-12-28 | 1983-07-09 | 市光工業株式会社 | Lamp disconnection detecting circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161104A (en) * | 2008-01-09 | 2009-07-23 | Autonetworks Technologies Ltd | Load control circuit and battery exhaustion preventive method |
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