Multiwavelength LED devices and methods of fabrication
US5625201A · kind A · utility
103Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Dec 12, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/813
Abstract
A multiwavelength LED device including a first LED constructed to emit light of a first wavelength and a second LED constructed to emit light of a second wavelength, different than the first wavelength. The first and second LEDs are stacked vertically on a substrate and positioned to both emit light in the same direction. One of the LEDs is transparent to light emitted by the other of the LEDs so that light from both LEDs is emitted through a single aperture and can be mixed in intensity to produce a variety of wavelengths. The LEDs are individually addressable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.