| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a burden on a power source by starting generation of pulses of currents supplied to respective light emitting means at different timings. <P>SOLUTION: In a light emitting device, a plurality of LEDs 1, 1, 1 emitting lights of different wavelengths are parallel-connected and the currents are supplied to the LEDs from the power source DC. A photo-sensing element 2 detects the lights emitted from the LEDs. A control section 3 PWM-controls the current supplied to each LED 1 based on a result of detection of each LED 1 by the photo-sensing element 2. The control part 3 controls to start generation of pulses of currents supplied to all the LEDs 1, 1, 1 not at the same timing but at the different timings to always light at least one LED 1 when lighting of the plurality of LEDs 1, 1, 1 is controlled. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
