2366753-A1 is referenced by 35 patents and cites 5 patents.

To provide a light-emitting element whose power efficiency is improved and which emits light of natural color like light bulb color. In the light-emitting element, at least three light-emitting units are stacked. The emission spectrum of the light-emitting element has two peaks. One of the two peaks is obtained by combining spectra of light emitted from two light-emitting units. The peak is in the yellow to orange wavelength range and has a wavelength greater than or equal to 560 nm and less than 580 nm. Thus, a wavelength range of high luminosity can be used and the power efficiency can be improved. The color of light emitted from the light-emitting element is close to a blackbody locus in a chromaticity diagram, and light of natural color like light bulb color can be achieved.

Title
Light-Emitting Element and Lighting Device
Lichtemittierendes Element und Beleuchtungsvorrichtung
Élément électroluminescent et dispositif déclairage
Application Number
EP20110155353 20110222
Publication Number
2366753 (A1)
Application Date
February 22, 2011
Publication Date
September 21, 2011
Inventor
USHIKUBO TAKAHIRO
JP
SEO SATOSHI
JP
Assignee
SEMICONDUCTOR ENERGY LAB
JP
IPC
H05B 33/14
H01L 51/50
H01L 51/00
H01L 27/32
C09K 11/06
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