Light-emitting device and method for compensating chromaticity of light-emitting device
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United States of America Patent
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Jul 11, 2017
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Jan 28, 2014
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Jan 29, 2013
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Abstract
An object of the present invention is to provide a light-emitting device having a temperature compensation function implemented with simple circuitry, and a method of temperature compensation in such a light-emitting device. More specifically, the invention provides a light-emitting device and a method of temperature compensation using a light-emitting device, wherein the light-emitting device includes a substrate, a first LED chip which is arranged on the substrate, and which has a characteristic such that Δx and Δy, each representing an amount of displacement on an xy chromaticity diagram, both are negative as temperature rises, and a second LED chip which is arranged on the substrate, and which has a characteristic such that Δx and Δy, each representing an amount of displacement on an xy chromaticity diagram, both are positive as temperature rises.
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