| 摘要 |
A variable color lamp system for a vehicle is provided to express various colors by controlling current and pulses of white LEDs and RGB LEDs in a pulse width modulation manner. A variable color lamp system includes a plurality of white LEDs(10), a plurality of RGB LEDs(20), and a control circuit. The RGB LEDs are formed with red(21), green(22), and blue(23) LEDs. The control circuit is formed with a control unit, a switch unit, an LED driving unit, and a power supply unit. The control circuit controls current and pulses of the white LEDs and the RGB LEDs by using a pulse width modulation method in order to change brightness and colors of the variable color lamp. The switch unit includes an ON switch for turning on/off the white LEDs, a DOOR switch for operating each of the white LEDs in a door opening state, a MOOD switch for composing internal atmosphere of a vehicle, and a DIMMER switch for adjusting the brightness and colors of the LEDs.
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