JPS6282597U - - Google Patents
Info
- Publication number
- JPS6282597U JPS6282597U JP17478585U JP17478585U JPS6282597U JP S6282597 U JPS6282597 U JP S6282597U JP 17478585 U JP17478585 U JP 17478585U JP 17478585 U JP17478585 U JP 17478585U JP S6282597 U JPS6282597 U JP S6282597U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- detection circuit
- potential
- switching circuit
- current
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
Description
図面は本考案の実施例を示す回路図である。
１…光源、２…スイツチング回路、３…電流検
出回路。
The drawing is a circuit diagram showing an embodiment of the present invention. 1...Light source, 2...Switching circuit, 3...Current detection circuit.
Claims (1)
を介して第２の電位に接続され、前記スイツチン
グ回路のオン／オフにより点燈／消燈される光源
の球切れ検出回路において、 前記光源の他端と前記第２の電位との間に接続
された抵抗と、 前記光源の他端に接続され、前記光源の他端に
電流が流れていることを検出する電流検出回路と
を備え、 前記スイツチング回路がオフの場合に前記抵抗
を介して前記光源に流れる微小電流を前記電流検
出回路により検出し、この結果に基づいて前記光
源の球切れを検出すべくなしたことを特徴とする
光源の球切れ検出回路。[Claims for Utility Model Registration] A light source bulb whose one end is connected to a first potential and the other end is connected to a second potential via a switching circuit, and which is turned on/off by turning on/off the switching circuit. The breakage detection circuit includes: a resistor connected between the other end of the light source and the second potential; and a resistor connected to the other end of the light source to detect that a current is flowing through the other end of the light source. a current detection circuit, the current detection circuit detects a minute current flowing to the light source via the resistor when the switching circuit is off, and detects a burnout of the light source based on this result. A light source bulb breakage detection circuit characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17478585U JPS6282597U (en) | 1985-11-12 | 1985-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17478585U JPS6282597U (en) | 1985-11-12 | 1985-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6282597U true JPS6282597U (en) | 1987-05-26 |
Family
ID=31113496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17478585U Pending JPS6282597U (en) | 1985-11-12 | 1985-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6282597U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5044685A (en) * | 1973-08-27 | 1975-04-22 | ||
| JPS50139695A (en) * | 1974-04-25 | 1975-11-08 |
-
1985
- 1985-11-12 JP JP17478585U patent/JPS6282597U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5044685A (en) * | 1973-08-27 | 1975-04-22 | ||
| JPS50139695A (en) * | 1974-04-25 | 1975-11-08 |