Light emitting device and display
US8685762B2 · kind B2 · utility
7Cited by
83References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Aug 15, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device comprises: an LED chip having a quantum well structure and a light emitting layer made of a gallium nitride compound semiconductor; a first transparent material covering the LED chip; a second transparent material for protecting the LED chip and the first transparent material; and a phosphor for absorbing a part of the light from the LED chip and emitting a light having a wavelength different from the light from the LED chip; wherein the phosphor is included in second transparent material, and the light from the LED chip and the light from said phosphor are mixed to make a white light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.