发明名称 |
Light-Emitting Element and Lighting Device |
摘要 |
<p>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.</p> |
申请公布号 |
EP2366753(A1) |
申请公布日期 |
2011.09.21 |
申请号 |
EP20110155353 |
申请日期 |
2011.02.22 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO, LTD. |
发明人 |
SEO, SATOSHI;USHIKUBO, TAKAHIRO |
分类号 |
C09K11/06;H01L27/32;H01L51/50;H01L51/52 |
主分类号 |
C09K11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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