Abstract: A lamp comprising: (a) a work light source configured to emit work light downward to illuminate a work surface; (b) a circadian stimulation (CS) light source having a light emitting surface for emitting CS light in at least a first mode normal to said work light, CS light in said first mode having a first EML and a first brightness sufficient to cause circadian entrainment in a user.

Abstract: The present disclosure provides lighting systems, which may be semiconductor light emitting devices, with two or more of blue, red and/or LRNE, short-blue-pumped cyan, long-blue-pumped cyan, yellow, and violet channels. The lighting systems can have a plurality of operational modes that provide different biological effects while having good color rendering capability. The yellow and violet channels can include violet LEDs and be used in operational modes that provide white light with lower EML values relative to operational modes using three or more of the blue, red, short-blue-pumped cyan, and long-blue-pumped cyan color channels.

Abstract: A backlight for a display for emitting at least first and second emitted light, said backlight comprising a violet LED for emitting violet light, a cyan LED for emitting cyan light, red QDs (RQDs) for emitting red light, green QDs (GQDs) for emitting green light, a driver configured at least for driving said violet LED in a first mode, and driving said cyan LED in a second mode, wherein in said first mode, said violet LED is driven to emit said violet light, a portion of which is absorbed by said RQDs and said GQDs to emit said red light and green light respectively, said cyan LED is driven to emit said cyan light, a portion of which is absorbed by said RQDs and said SGQDs to emit said red light and short green light respectively.

Abstract: A display comprising (a) a front lit or back lit display; (b) a light source for lighting the display, the light source comprising a violet emitter for emitting violet light having a peak wavelength of 400 to 430 nm and phosphor emitter excited by the violet light and emitting yellow-green light having a peak wavelength of 530 to 620 nm; (c) wherein a combination of the violet light and the yellow green light produces white light; (d) wherein the white light has a color rendering index less than 70.

Abstract: This disclosure pertains to methods, apparatus, circuitry, and techniques for controlling the dimming of lighting fixtures with precision and, particularly, down to very low levels of illumination.

Abstract: A display comprising: (a) a plurality of pixels, each of said plurality of pixels comprising three sub pixels with each subpixel comprising an LED, wherein at least one LED of said three subpixels of each pixel comprises a dual wavelength LED; and (b) at least one driver for driving LEDs of said three subpixels, said at least one driver having three contacts for said at least one LED of each pixel.

Abstract: An LED pump light with multiple phosphors is described. LEDs emitting radiation at violet and/or ultraviolet wavelengths are used to pump phosphor materials that emit other colors. The LEDs operating in different wavelength ranges are arranged to reduce light re-absorption and improve light output efficiency.

Abstract: Apparatus and methods of attaching accessories to LED lamps and for providing active accessories in LED lamps are disclosed. The active accessories include single-function active accessories as well as multi-function active accessories.

Abstract: A lighting device, comprising a housing, a light emitting diode, an optical system configured to at least partially collimate light emissions in a forward direction; and a removable accessory that reflects a portion of the light emissions more than 90 degrees from the forward direction. Also, a lighting device comprising a housing and a plurality of light emitters arranged in a row, and a light distribution-modifying element comprising a body portion and a plurality of light distribution-modifying protrusions (each comprising a reflection surface) arranged in a row substantially parallel to the row of light emitters, at least some of the light emitters aligned with at least some of the plurality of light distribution-modifying protrusions as respective pairs. Also, a light distribution-modifying element, and a lighting device comprising a housing, at least one light emitter, and a light distribution-modifying element comprising a body portion and a light distribution-modifying protrusion. Also, methods.

Abstract: A method includes determining a first amount of equivalent melanopic lux (EML) based on an actual time of day or an intended time of day, providing, via one or more sources, light configured to emit a first set of spectra that causes the first amount of EML and providing a light guide configured to receive and reflect the light toward an electronic paper (e-paper) display, the light guide being in front of the e-paper display in relation to the reader.

Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.

Abstract: A display for emitting display light comprising: (a) a light source for emitting a source light; and (b) a filter positioned in the path of said source light, said filter comprising at least short, medium and long filters, wherein said short filter is configured to transmit short-primary light from said source light, said short-primary light comprising a violet portion having wavelengths from 400 to 440 nm and at least a second portion having wavelengths above 440 nm such that said short-primary light is perceptually blue, said short-primary light having a short-primary SPD having a short-primary power between 380-780 nm and a blue power between 440-500 nm, wherein said blue power is less than 5% of said short-primary power.

Abstract: In one embodiment, a method comprising: (a) receiving a set of physiological data associated with at least one health condition of an animal subject; (b) receiving a set of environmental data associated with one or more environment conditions to which the subject is or has been exposed; (c) determining a set of operating parameters for at least one environmental device based at least partially on at least a portion of the set of physiological data and at least a portion of the set of environmental data; and (d) transmitting the set of operating parameters to the at least one environmental device to at least partially control at least one controlled environmental condition to which the subject is exposed to thereby at partially control the at least one health condition.

Abstract: Methods and apparatus for providing circadian-friendly LED light sources are disclosed. A light source is formed to include a first LED emission (e.g., one or more LEDs emitting a first spectrum) and a second LED emission (e.g., one or more LEDs emitting a second spectrum) wherein the first and second LED emissions are combined in a first ratio and in a second ratio such that while changing from the first ratio to the second ratio the relative circadian stimulation is varied while maintaining a color rendering index above 80.

Abstract: A system for generating white light comprising a plurality of channels to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each channel being driven with a separately controllable drive current to tune the generated light output.

Abstract: Lighting system having visible-light source including semiconductor light-emitting devices arranged for generating plurality of visible-light emissions having range of color points including cool to very cool white color point for daytime and warm to very warm white color point for nighttime. Optical system arranged for causing some visible-light emissions to have range of beam widths including relatively wide and narrow beam widths. Mounting system causing range of beam directions. Control system causing visible-light emissions to include daytime configuration having cool to very cool white color point and relatively wide beam width, and nighttime configuration having warm to very warm white color point and relatively narrow beam width. Daytime configuration includes control system for causing visible-light emissions to include lateral- or up-light emissions, promoting relatively high equivalent melanopic lux.