Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2011-05-10
2011-05-10
Ko, Tony (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C362S235000, C362S317000
Reexamination Certificate
active
07939794
ABSTRACT:
A light fixture, using one or more solid state light emitting elements utilizes a diffusely reflect chamber to provide a virtual source of uniform output light, at an aperture or at a downstream optical processing element of the system. Systems disclosed herein also include a detector, which detects electromagnetic energy from the area intended to be illuminated by the system, of a wavelength absent from a spectrum of the combined light system output. A system controller is responsive to the signal from the detector. The controller typically may control one or more aspects of operation of the solid state light emitter(s), such as system ON-OFF state or system output intensity or color. Examples are also discussed that use the detection signal for other purposes, e.g. to capture data that may be carried on electromagnetic energy of the wavelength sensed by the detector.
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May Don F.
Rains, Jr. Jack C.
Ramer David P.
ABL IP Holding LLC
Ko Tony
McDermott Will & Emery LLP
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