Lutron Technology Company LLC

Ketra, Inc.

Lutron Ketra, LLC

Derek Edward Logan

David J Knapp

John P Michalko

Steven F Coakley

Tomas J Mollnow

Fangxu Dong

Craig T Phillips

A linear multi-color LED illumination device that produces uniform color throughout the output light beam without the use of excessively large optics or optical losses is disclosed herein. Embodiments for improving color mixing in the linear illumination device include, but are not limited to, a shallow dome encapsulating a plurality of emission LEDs within an emitter module, a unique arrangement of a plurality of such emitter modules in a linear light form factor, and special reflectors designed to improve color mixing between the plurality of emitter modules. In addition to improved color mixing, the illumination device includes a light detector and optical feedback for maintaining precise and uniform color over time and/or with changes in temperature. The light detector is encapsulated within the shallow dome along with the emission LEDs and is positioned to capture the greatest amount of light reflected by the dome from the LED having the shortest emission wavelength.

Linear LED illumination device with improved color mixing

A recessed downlight fixture and method for installation is provided. The recessed downlight fixture can be installed in a retrofit application, after a ceiling is installed, through a pre-existing opening in that ceiling. Alternatively, a recessed downlight fixture according to a second embodiment can be installed before a ceiling is present. In either embodiment, the light source coupled to, for example, a heat sink, can be universally moved in three degrees of movement, rotationally, along a tilt axis, or further within the ceiling to increase or decrease the recess. All such universal adjustments can take place through and below the ceiling opening during or after installation.

Recessed downlight fixture

Recessed downlight fixture and method for installing the fixture and adjusting the fixture collar opening

Recessed downlight fixture and method for installing and universally adjusting the fixture in a new construction application

Recessed downlight fixture and method for installing and universally adjusting the fixture in a retrofit application

A linear multi-color LED illumination device is described herein as including a rotational hinge, which allows a power cable of the illumination device to enter and exit through a rotational axis of the hinge, and which does not require special tools or an independent locking mechanism to secure in place.

Linear LED illumination device with improved rotational hinge

Growing community of inventors

Austin, TX, United States of America

Derek Edward Logan