Rambus Delaware LLC

Gregg M Podojil

Timothy A McCollum

Jeffery R Parker

Fumitomo Hide

Laszlo A Takacs

Christopher R Ruhland

Matthew R Wancata

Robert Michael Ezell

Martin E Ligas

A modular light-emitting panel assembly has first and second light guides edge lit by respective light sources. Each light guide has a light input edge, opposed side edges, opposed major surfaces and a pattern of light extracting elements at at least one of the major surfaces. The light guides are juxtaposed with a side edge of the first light guide abutting a side edge of the second light guide at a seam and with the major surfaces nominally coplanar. Various embodiments of the panel assembly additionally include respective structures that reduce visibility of the seam when the light sources illuminate the panel assembly.

Modular light-emitting panel assembly

An LED lamp or LED lighting assembly includes a light guide having opposed major surfaces configured to propagate light by total internal reflection and a light input edge extending between the major surfaces. A light source is adjacent to the light input edge and is configured to edge light the light guide. In some embodiments, the light source is moveable relative to the light input edge, and the spectrum of the light output from the light guide may be adjusted by movement of the light source relative to the light input edge.

LED lamp and LED lighting assembly

A lighting assembly includes a light source to emit on-axis light rays at smaller angles relative to an optical axis of the light source, and off-axis light rays at larger angles relative to the optical axis and spectrally different from the on-axis light rays. The lighting assembly additionally includes a light guide having a light input edge adjacent the light source and opposed major surfaces between which light from the light source propagates by total internal reflection. The light input edge has an edge feature aligned with the light source to receive light therefrom. The edge feature specularly redirects the on-axis light rays and the off-axis light rays differently to increase overlap between the on-axis light rays and the off-axis light rays within the light guide. The increased overlap reduces spatial color variation of light extracted from the light guide between locations at different angles from the optical axis.

Lighting assembly with a light guide having light-redirecting edge features

LED lamp and led lighting assembly

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Cleveland, OH, United States of America

Gregg M Podojil