| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED driving device that can suppress dispersion of LED brightness without using any special photodetector. <P>SOLUTION: An LED driving device for driving plural LEDs to emit light, and has a photodetector 4 for detecting data of an amount of light emitted from a measurement target LED, which is one of the plural LEDs 1, 2, when the measurement target LED 1 is driven to emit light, and detecting an electromotive voltage of at least one LED around the measurement target LED 1 by using the LED as a light amount detecting LED 2, and an LED driving circuit 3 for driving the LEDs so that the measurement target LED 1 emits light and the other LEDs do not emit light. When all or some of the plural LEDs are driven to emit light as illumination light, the LED driving circuit 3 can individually vary the light amount of each of the plural LEDs on the basis of the data corresponding to the light amount so that the light amount is equal to a reference light amount to be emitted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
