| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems, wherein changes in the luminance and the chromaticity of an LED against temperature changes are large in a light-emitting device that uses the LED, and even though the stability of luminance and chromaticity with respect to temperature changes can be improved by using a phosphor, color reproduction of the light-emitting device is deteriorated. <P>SOLUTION: The light emitting device is provided with a first LED, a second LED, a phosphor to be excited by the second LED and capable of generating light of the same or similar color as/to the light-emitting color of the first LED, and a control circuit for controlling the ratio of the light-emitting intensity of the first LED to that of the second LED according to the condition. <P>COPYRIGHT: (C)2008,JPO&INPIT |
