FAILURE DETECTION CIRCUIT AND LIGHTING CONTROL CIRCUIT INCLUDING THE SAME, AND VEHICLE LAMP

To detect a phosphor failure (for example, loss or end of life) earlier or with a simpler circuit configuration.SOLUTION: A failure detection circuit includes, as a resistor R1, a phosphor PS1 that generates and emits light with a wavelength different from that of laser light emitted from a laser di...

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Bibliographische Detailangaben
Hauptverfasser:	YANG YUNWEN, KUMETA MASAYUKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	To detect a phosphor failure (for example, loss or end of life) earlier or with a simpler circuit configuration.SOLUTION: A failure detection circuit includes, as a resistor R1, a phosphor PS1 that generates and emits light with a wavelength different from that of laser light emitted from a laser diode LD1 on the basis of the laser light, and can generate a turn-off signal for turning off the laser diode LD1 according to a change in a resistance value of the resistor R1.SELECTED DRAWING: Figure 3 【課題】蛍光体の故障（例えば、欠損又は寿命）をより早く又はより簡素な回路構成で検出するニーズがある。【解決手段】故障検出回路は、レーザーダイオードＬＤ１から放射されるレーザー光に基づいてレーザー光とは異なる波長の光を生成して放出する蛍光体ＰＳ１を抵抗器Ｒ１として含み、抵抗器Ｒ１の抵抗値の変化に応じてレーザーダイオードＬＤ１を消灯させるための消灯信号を生成可能である。【選択図】図３