Vehicle lighting control device
AssigneeKoito Manufacturing Co., Ltd.
InventorsKotaro Matsui, Takayoshi Kitagawa
Life of this patent
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Abstract
A vehicle lighting control device includes a switching unit to perform ON/OFF control of a driving current supplied to a semiconductor light source depending on a light control signal; and a constant-current control unit to perform constant-current control on the driving current. The constant-current control unit includes a switch unit to perform ON/OFF control of the switching unit; and a signal-maintaining unit to provide a voltage signal corresponding to the driving current to the switch unit when the switching unit performs ON control, and to provide continuously the voltage signal to the switch unit when the switching unit performs OFF control.
Claims5
A vehicle lighting control device comprising:
- a switching unit to perform ON/OFF control of a driving current supplied to a semiconductor light source depending on a light control signal;
- and
- a constant-current control unit to perform constant-current control on the driving current, the constant current control unit comprising:
- a switch unit to perform ON/OFF control of the switching unit;
- and
- a signal-maintaining unit to provide a voltage signal corresponding to the driving current to the switch unit when the switching unit performs ON control, and to provide continuously the voltage signal to the switch unit when the switching unit performs OFF control.
Dependencies are inferred from the claim text.