| 摘要 |
PURPOSE: A controller for an LED atmosphere lamp installed in a bus is provided to automatically control color conversion, blinking, and dimming using light emitted from an atmosphere lamp, thereby easily expressing an atmosphere. CONSTITUTION: A color LED is composed of R, G, B elements. An atmosphere lamp(10) includes a printed circuit board on which LEDs are mounted. A filter unit filters power supplied from a battery(1). A power supply unit(20) drops a filtered voltage to a constant voltage. An A/D converter(50) converts an analog signal into a digital audio signal. An input unit(40) comprises a plurality of switches for manipulation of a user. A microcomputer(30) controls color LED light emission of the atmosphere lamp.
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