| 摘要 |
PROBLEM TO BE SOLVED: To provide a miniaturized lighting device with improved malfunction and unstability. SOLUTION: A lighting device consists of a power system 14 to generate high voltage, a control system 15 to control the power system and a power supply system 16 to generate voltage for driving the power system 14 and the control system 15. A ground wiring GND for the power system 14 and ground wirings AGND, DGND for analog circuits 20A, 21A and digital circuits 20D, 21D constituting the control system 15 are formed as individually independent ground wirings. The mixture of noise in between the power system 14 and each of the analog circuits and the digital circuits for the control system 15 via the ground wirings can be prevented, the lighting system can be miniaturized and the stability of output voltage can be improved. |
