Solid state linear array modules for general illumination
US8240875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2008 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Jan 11, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination module includes a longitudinal support member including a base portion and a pair of sidewalls extending from the base portion that together define a channel that extends in a longitudinal direction. A printed circuit board (PCB) on the base portion extends in the longitudinal direction within the channel. A plurality of light emitting diodes (LEDs) are on the PCB in a linear array. A reflective sheet is within and extends across the channel, and includes a plurality of holes that correspond with locations of the LEDs on the PCB, and the LEDs are at least partially within the holes. An optical film extends across the channel above the reflective sheet and defines an optical cavity between the reflective sheet and the optical film. The optical film, the reflective sheet and the sidewalls of the support member are configured to recycle light in the optical cavity by reflecting some light emitted by the LEDs back into the optical cavity and transmitting some light emitted by the LEDs out of the optical cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.