Semiconductor light emitting light concentration device
US5181220A · kind A · utility
25Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/841
Abstract
A semiconductor light emitting light concentration device is described which has a multiple diffraction ring for collecting and concentrating the light emitted from an LED integrally formed into the electrode at the semiconductor substrate end of the light emitting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.