Light emitting device and projection display apparatus
US10386705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2016 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Apr 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/113
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light emitting device and a projection display apparatus. The light emitting device comprises: an excitation light source (11), used for emitting excitation light; a compensation light source (12), used for emitting compensation light having a spectral range different from that of the excitation light; and a wavelength conversion device (13), disposed in a transmission path of the excitation light and the compensation light and used for outputting sequential light under alternate irradiation of the excitation light source (11) and the compensation light source (12), the sequential light comprising at least one type of excited light and the compensation light. The compensation light has spectral overlap with at least one type of excited light in the at least one type of excited light, so as to greatly improve the brightness of the light emitting device and the utilization efficiency of light in the light emitting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.