JPH01109459U - - Google Patents
Info
- Publication number
- JPH01109459U JPH01109459U JP419788U JP419788U JPH01109459U JP H01109459 U JPH01109459 U JP H01109459U JP 419788 U JP419788 U JP 419788U JP 419788 U JP419788 U JP 419788U JP H01109459 U JPH01109459 U JP H01109459U
- Authority
- JP
- Japan
- Prior art keywords
- warning lamp
- capacitor
- key switch
- start position
- warning
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
第１図は本考案のウオーニングランプの断線検
出回路の一実施例を示す回路図、第２図は第１図
の回路の動作を示すタイミングチヤート図、第３
図は従来回路例を示す回路図、第４図は第３図の
回路の動作を示すタイミングチヤート図である。
１…ＩＧＮキースイツチ、３…断線検出回路、
Ｌ１〜Ｌｎ…ウオーニングランプ、Ｓ１〜Ｓｎ…
センサ、Ｑ１〜Ｑ２…スイツチングトランジスタ
、Ｄ…逆流阻止用のダイオード、Ｃ…コンデンサ
。
FIG. 1 is a circuit diagram showing an embodiment of the warning lamp disconnection detection circuit of the present invention, FIG. 2 is a timing chart showing the operation of the circuit in FIG. 1, and FIG.
The figure is a circuit diagram showing an example of a conventional circuit, and FIG. 4 is a timing chart showing the operation of the circuit of FIG. 3. 1...IGN key switch, 3...Disconnection detection circuit,
L1 to Ln ...warning lamp, S1 to Sn ...
Sensor, Q1 to Q2 ...Switching transistor, D...Diode for blocking reverse current, C...Capacitor.
Claims (1)
生時に前記ウオーニングランプを点灯し、車両の
各部の状態を警告表示させるセンサと、該センサ
と並列に接続されたスイツチングトランジスタを
有し、該スイツチングトランジスタをイグニツシ
ヨンキースイツチのスタートポジシヨンへの操作
に応じて強制的にオンし、このときのウオーニン
グランプの不点灯によりウオーニングランプの断
線を検出する回路において、 前記イグニツシヨンキースイツチのスタートポ
ジシヨンへの操作時に、逆流阻止用のダイオード
を介して充電されるコンデンサを有し、 該コンデンサの端子電圧により前記スイツチン
グトランジスタのオン、オフを制御するようにし
た、 ことを特徴とするウオーニングランプの断線検
出回路。[Claims for Utility Model Registration] A sensor connected in series to a warning lamp, which lights up the warning lamp when an abnormality occurs to display a warning about the status of each part of the vehicle, and a switching device connected in parallel with the sensor. A circuit that has a transistor, forcibly turns on the switching transistor in response to the operation of an ignition key switch to the start position, and detects a disconnection of the warning lamp when the warning lamp is not lit at this time. A capacitor is provided which is charged via a reverse current blocking diode when the ignition key switch is operated to the start position, and the switching transistor is controlled to be turned on or off by the terminal voltage of the capacitor. A disconnection detection circuit for a warning lamp, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP419788U JPH01109459U (en) | 1988-01-19 | 1988-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP419788U JPH01109459U (en) | 1988-01-19 | 1988-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01109459U true JPH01109459U (en) | 1989-07-24 |
Family
ID=31206492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP419788U Pending JPH01109459U (en) | 1988-01-19 | 1988-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01109459U (en) |
-
1988
- 1988-01-19 JP JP419788U patent/JPH01109459U/ja active Pending
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