LIGHT-EMITTING DEVICE
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United States of America Patent
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Issued Date -
Jul 16, 2015
app pub date -
Jan 10, 2014
filing date -
Jan 10, 2014
priority date (Note) -
Abandoned
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Abstract
Disclosed is a lighting-emitting device comprising a first light-emitting chip emitting a first light; a second light-emitting chip emitting a second light having a wavelength longer than that of the first light; and a heat sink nearer the second light-emitting chip than the first light-emitting chip, wherein the light-emitting device is operated from a cold state to a hot state, and a temperature of the second light-emitting chip is lower than that of the first light-emitting chip at the hot state.
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