| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress flickering in composited light emitted from an entire LED and a change in a light color in an LED control system for controlling the output of the LED according to the measurement results by measuring the light output of the LED. <P>SOLUTION: The LED control system 1 includes: a plurality of LEDs 2; a sensor 3 for measuring each light output by lighting at least one portion of the LEDs 2; and a control section 4 for individually controlling the output of the plurality of LEDs 2 based on the measurement results of the sensor 3. The on of the LEDs 2 is controlled based on the on-duty ratio of PWM signals. The control section 4 performs fading when changing the control value (on-duty ratio) of the LED 2 from a present value to a target value set based on the measurement results of the sensor 3, thus preventing light emitted from the LED 3 from changing abruptly, and hence suppressing flickering in the emitted light and preventing a user from feeling uncomfortable. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
