Patent ID: 8952627
Filing Date: 2015-02-10
Classification: H05B

Abstract:
1. An illuminating device, comprising: a plurality of kinds of LEDs that emit light having different color temperatures; an LED lighting unit that outputs currents to the LEDs to independently light the LEDs that emit light having different color temperatures; and a control unit configured to control the LED lighting unit to change the currents output to the LEDs such that a combined color output of the LEDs is changed while a combined illuminance of the LEDs before and after the change of the currents output to the LEDs is maintained, wherein the plurality of kinds of LEDs include bulb color LEDs and white color LEDs having higher color temperature than that of the bulb color LEDs, and the control unit maintains the combined illuminance of the LEDs before and after the change in the combined color output of the LEDs by changing the current output to the bulb color LEDs without specifically detecting the optical output of the bulb color LEDs, the amount of change in current output corresponding to a change in total optical output of the bulb color LEDs and the white color LEDs.