LED lighting device

摘要

An LED lighting device 1 lights LED blocks 4a and 4b which correspond to a plurality of functions of an illuminator such as headlights and are connected in series. The LED blocks 4a and 4b are connected in series with a current converting unit 5. While the LED blocks 4a and 4b are supplied with a current Ia from a single DC/DC converter unit 3, the LED block 4b is supplied with a current Ib that passes through conversion by the current converting unit 5 and that differs from the current Ia the DC/DC converter unit 3 outputs. Thus, the LED blocks 4a and 4b are each lit with appropriate brightness.

主权项

1. An LED lighting device that supplies a first LED and a second LED connected in series prescribed currents generated from a power supply to light them, the LED lighting device comprising:
a DC/DC converter unit that generates a first current for lighting at least the first LED from the power supply; a current converting unit that converts the first current to a second current for lighting the second LED; and a control unit that controls the DC/DC converter unit and the current converting unit, wherein the current converting unit is connected in series between the first LED and the second LED.