VEHICULAR LAMP

摘要

The present disclosure provides a vehicular lamp including bypass circuits parallel to light emitting devices to precisely cope with an abnormality of the bypass circuit side. The vehicular lamp includes: one or more bypass units connected in parallel to at least a part of a plurality of light emitting devices to form a bypass route of the emission driving current so that the light emitting device is turned OFF according to a bypass control signal, or to cut off the bypass route; abnormality detecting units configured to generate state signals each of which indicates an normal state or an abnormal state of each of the bypass units; and a control unit configured to control the formation of the bypass route. When the generated state signal indicates that each of the bypass units is abnormal, supply of the emission driving current from the light source power supply is reduced or stopped.

主权项

1. A vehicular lamp comprising:
a plurality of light emitting devices connected in series; a light source power supply configured to supply an emission driving current to the plurality of light emitting devices; one or more bypass units connected in parallel to at least some of the light emitting devices to form a bypass route of the emission driving current so as to cause the light emitting devices to be in a turn-OFF state according to a bypass control signal, or to cut off the bypass route of the emission driving current so as to cause the light emitting devices to be in a turn-ON state; an abnormality detecting unit configured to generate a state signal indicating whether the one or more bypass units are in a normal state or abnormal state; and a control unit configured to control the formation (ON) or the cut-off (OFF) of the bypass route, wherein when a signal indicating that the one or more bypass units are abnormal is generated as the state signal, supply of the emission driving current from the light source power supply is reduced or stopped.