Patent ID: 7183718
Filing Date: 2007-02-27
Classification: H01L

Abstract:
1. A light-emitting device comprising: a plurality of light-emitting elements configured to emit light of mutually different colors; at least one light-detecting element configured to detect light emitted from the light-emitting elements; the light-emitting elements and the light-detecting element being on a substrate, wherein the light-emitting elements comprise light-emitting chips configured to emit light of a first, second and third color, respectively; a light emission control portion configured to apply a current to the light-emitting chips thereby allowing the light-emitting chips to emit light at predetermined time intervals; and a light intensity adjustment portion configured to serially receive detection signals from the light-detecting element as to correspond to an intensity of incident light, analyze the detection signals and adjust the current applied to the light-emitting chips so that a predetermined color can be generated; wherein the light emission control portion is configured to allow the light-detecting element to detect external light incident on the light-detecting element in a time in which none of the light-emitting chips emit light, and the light intensity adjustment portion is configured to adjust from a first to a second on-zero value the current applied to each of the light-emitting chips by use of the detection signals based on the detected external light.