LED LIGHT SOURCE WITH DIFFUSER

LED LIGHT SOURCE WITH DIFFUSER

There is herein described a light source that homogenizes the light produced by a large area array of forward directed LEDs mounted on highly reflective substrate, while achieving a low-profile form factor and maintaining high efficacy. The LED light source employs a diffuser comprised of two diffus...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LENEF, Alan, AVALLON, James, HAMBY, David
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:There is herein described a light source that homogenizes the light produced by a large area array of forward directed LEDs mounted on highly reflective substrate, while achieving a low-profile form factor and maintaining high efficacy. The LED light source employs a diffuser comprised of two diffusing layers: a low scattering diffusing layer bonded to the LEDs and a high scattering diffusing layer that is bonded to the low scattering diffusing layer. The LED light source achieves good diffuse illumination with a thin diffuser by making use of a light channeling effect between the highly reflective substrate and the high backscattering from the high scattering diffusing layer.