LIGHT EMITTING METHOD FOR IMPROVING LUMINANCE AND COLOR RENDERING PERFORMANCE OF LED LIGHTING DEVICE AND ITS LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a light emitting method of improving luminance and color rendering of a white LED lighting device in which heat control of the lighting device is not necessary, and which illuminates the whole room with little illumination shadow utilizing reflection light and improves color rendering at a low cost, and does not have conspicuous color unevenness, and its lighting device.;SOLUTION: In the light emitting method and the lighting device of improving luminance and color rendering performance of white LED lighting device, the current amount at the time of lighting the white LED of the lighting device is made a rated current value or less to emit light, preferably in the range of nearly 14-75% of the rated current value, or so that the LED lighting device may emit light in the range of an input current value selected by the difference of characteristics unique to the white LED, from a minimum current value or more to emit light to a current value where color tone luminance of red and blue color is reversed or that vicinity or less, the input current of the chip type white LED is restricted to obtain the illumination light.;COPYRIGHT: (C)2011,JPO&INPIT