Multi-segment light-emitting diode
US6606175B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1999 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Mar 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/1141
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power conservative multi-segment LED transmitter including a multi-segment LED with a plurality of independently addressable LED segments, each LED segment suitable for selectively emitting a beam segment. A controller selectively enables and disables the LED segments. Depending on whether the beam segments overlap or not and whether low or high power is supplied to the enabled LED segments, the combined resulting beam may be a low power steered beam, a power conservative steered beam, an overlapping low power intense steered beam, or an overlapping power conservative steered beam. The steerable multi-segment LED transmitter and receiver system preferably includes an “all enabled” state in which each of the LED segments are enabled and emit a respective beam segment; a “training” state in which the LED segments are selectively enabled and disabled and the receiver determines substantially detected beam segments; and a “steered” state in which only the LED segments emitting the substantially detected beam segments are enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.