Light emitting diode lamp device
US6550953B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Feb 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A casing accommodates therein three primary colors of chip LEDs. The casing is disposed in a through hole of a plate-shaped light guide. The chip LEDs are mounted on both surfaces of a substrate so as to face a peripheral surface of the through hole (light incident surface). The casing is made of a transparent synthetic resin accommodating therein the substrate and the chip LEDs. The light emitted from the chip LEDs can be introduced directly into the light incident surface of the light guide. The three primary color of chip LEDs are controlled so that a desired color and intensity of light can be efficiently introduced into the light guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.