Abstract: A lens for an LED having a lens body providing total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane. The lens includes an arcuate light-diffusing edge for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. The light diffused by the lens provides for substantially uniform mixing of at least two different colors of light emitted by a multi-color LED apparatus disposed at the first emission point.

Abstract: A method and apparatus is disclosed for operating a multi-color LED domelight employing color blinking as a visibility enhancement technique. In the method, light is emitted having a first color, upon which light is intermittently emitted having a second color during the step of emitting light having a first color. All light is emitted through a common light-emitting surface defined by a domelight housing. The intermittent blinking of a different color light during or between the emission of the first color light enhances the visual perceptibility of the domelight device. In one embodiment, the first color is substantially red and the second color is substantially yellow. In another embodiment, the first color is substantially green and the second color is substantially magenta. In yet another embodiment, the first color is substantially blue and the second color is substantially white.

Abstract: A domelight which includes a housing body defining at least one light-emitting surface for transmission of light by an LED. The housing body includes at least one contrast surface adjacent the at least one light-emitting surface. The at least one contrast surface includes a first contrast surface disposed on a first side of the at least one light-emitting surface and a second contrast surface disposed on a second side of the at least one light-emitting surface opposite the first side. The housing body further defines a plurality of light-emitting surfaces for transmission of light by a plurality of LEDs. The plurality of light-emitting surfaces are arranged substantially parallel to each other and spaced apart by a contrast surface disposed between each of the plurality of light-emitting surfaces.

Abstract: A lens for an LED having a lens body providing total internal reflection of light emitted by the LED from a first emission point disposed proximate a first junction of the lens body and centerplane. The lens includes an arcuate light-diffusing edge for diffusing light emitted by the LED and reflected by the angular base and sidewall assembly, the light being diffused by the lens at substantially uniform luminance across a sector of at least 150 degrees centered and measured about the first junction. The light diffused by the lens provides for substantially uniform mixing of at least two different colors of light emitted by a multi-color LED apparatus disposed at the first emission point.

Abstract: A high-isolation call cord switch includes connectivity for a standard hospital-style push-button call cord while using low voltage alternating current to isolate detection circuitry from static electricity. An alternating current signal is used to permit transformer coupling, with its intrinsic isolation capability, between the call cord switch and the detection circuit.

Abstract: A high-isolation call cord switch includes connectivity for a standard hospital-style push-button call cord while using low voltage alternating current to isolate detection circuitry from static electricity. An alternating current signal is used to permit transformer coupling, with its intrinsic isolation capability, between the call cord switch and the detection circuit.