VEHICLE LAMP AND VEHICLE LAMP DRIVING DEVICE

摘要

There is provided a driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp. The driving device includes a current source which is configure to supply a drive current to the light source, and N bypass circuits which are provided in parallel to N light emitting units, respectively. Each of the bypass circuits includes a bypass transistor which is provided in parallel to a corresponding light emitting unit, a feedback capacitor which is provided between a gate and a drain of the bypass transistor, and a gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor according to a control signal.

主权项

1. A driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp, the driving device comprising:
a current source which is configure to supply a drive current to the light source; and N bypass circuits which are associated with N light emitting units of the plurality of light emitting units and provided in parallel to the N light emitting units, respectively, and which are configured to be independently switchable between an ON state and an OFF state, where N is a natural number, wherein each of the bypass circuits includes:
a bypass transistor which is provided in parallel to a corresponding light emitting unit;a feedback capacitor which is provided between a gate and a drain of the bypass transistor or between a gate and a collector of the bypass transistor; anda gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor or between the gate and an emitter of the bypass transistor, according to a control signal.