Composite cavity for enhanced efficiency of up-conversion
US7804640B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2008 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Oct 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H29/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods, apparatus and systems for an up-converter resonant cavity light emitting diode device includes a semiconductor light source, an up-converter to form the light emitter with up-converting materials and an electrical source coupled with the semiconductor light source for providing electrical energy to the semiconductor light source to provide a desired wavelength emitted light. The semiconductor light source is a resonant cavity light emitting diode or laser that emits an approximately 975 nm wavelength to provide electrical and optical confinement to the semiconductor light source to form a resonant cavity up-converting light emitting diode (UC/RCLED). Rows and columns of electrodes provide active matrix addressing of plural sets of UC/RCLEDs for display devices. The up-converter resonant cavity light emitting diode device has applications in head mounted projection display optical system using spectrally selective beam splitters to eliminate spectral overlap between colors and to combine the red, green and blue beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.