Abstract:
A lamp optical component comprises a hollow extruded component, where the hollow extruded component includes a photoluminescence portion and a light shaping portion, and where the photoluminescence portion extends into an interior volume of the hollow extruded component.
Abstract:
A solid-state lamp comprises: one or more solid-state light emitting devices (typically LEDs); a thermally conductive body; at least one duct; and a photoluminescence wavelength conversion component remote to the one or more LEDs. The lamp is configured such that the duct extends through the photoluminescence wavelength conversion component and defines a pathway for thermal airflow through the thermally conductive body to thereby provide cooling of the body and the one or more LEDs.
Abstract:
A photoluminescent composition ("phosphor ink") comprises a suspension of particles of at least one blue light (380nm to 480nm) excitable phosphor material in a light transmissive liquid binder in which the weight loading of at least one phosphor material to binder material is in a range 40% to 75%. The binder can be U.V. curable, thermally curable, solvent based or a combination thereof and comprise a polymer resin; a monomer resin, an acrylic, a silicone or a fluorinated polymer. The composition can further comprise particles of a light reflective material suspended in the liquid binder. Photoluminescence wavelength conversion components; solid-state light emitting devices; light emitting signage surfaces and light emitting signage utilizing the composition are disclosed.
Abstract:
A method of fabricating a light emitting device having a specific target color, CIE xy, of emitted light is described. The device comprises a light emitting diode that is operable to emit light of a first wavelength range and at least one phosphor material which converts at least a part of the light into light of a second wavelength range wherein light emitted by the device comprises the combined light of the first and second wavelength ranges. The method comprises: depositing a pre-selected quantity of the at least one phosphor material on a light emitting surface of the light emitting diode; operating the light emitting diode; measuring the color of light emitted by the device; comparing the measured color with the specific target color; and depositing and/or removing phosphor material to attain the desired target color.
Abstract:
A method of fabricating a light emitting device having a specific target color, CIE xy, of emitted light is described. The device comprises a light emitting diode that is operable to emit light of a first wavelength range and at least one phosphor material which converts at least a part of the light into light of a second wavelength range wherein light emitted by the device comprises the combined light of the first and second wavelength ranges. The method comprises: depositing a pre-selected quantity of the at least one phosphor material on a light emitting surface of the light emitting diode; operating the light emitting diode; measuring the color of light emitted by the device; comparing the measured color with the specific target color; and depositing and/or removing phosphor material to attain the desired target color.
Abstract:
A photolummescence wavelength conversion component comprises a first portion having at least one photolummescence material; and a second portion comprising light reflective material, wherein the first portion is integrated with the second portion to form the photolummescence wavelength conversion component.
Abstract:
An LED-based lamp (bulb), lamp cover component, and methods for manufacturing thereof are disclosed which provides a light diffusive lamp cover having a diffusivity (transmittance) that is different for different areas (zones or regions) of the cover. The diffusivity and location of those areas are configured so that the emission pattern of the whole lamp meets desired emissions characteristics and optical efficiency levels. The diffusive lamp cover may have any number of specifically delineated diffusivity areas. Alternatively, the bulb cover may provide a gradient of increasing/decreasing diffusivity portions over the cover.
Abstract:
A light emitting device comprises a solid-state light source; a first wavelength conversion component comprising a first photo-luminescent material and a second wavelength conversion component comprising a second photo-luminescent material. At least the second wavelength conversion component is remote to the solid state light source and the first wavelength conversion component is closer in proximity to the solid-state light source and smaller in area than the second wavelength conversion component.
Abstract:
A tunable light emitting device includes a plurality of solid-state light sources, a dimmer switch configured to generate a range of output powers for the light emitting device, a control circuit configured to translate an output power generated by the dimmer switch into an on/off arrangement of the plurality of light sources, and a wavelength conversion component comprising two or more regions with different photo-luminescent materials located remotely to the plurality of solid-state light sources and operable to convert at least a portion of the light generated by the plurality of solid-state light sources to light of a different wavelength, wherein the emission product of the device comprises combined light generated by the plurality of light sources and the two or more regions of the wavelength conversion component.
Abstract:
A method of manufacturing a light emitting device comprises: mounting and electrically connecting a plurality of solid-state light emitters onto a substrate in a known configuration; screen printing a pattern of at least one photo luminescent material onto a surface of a light transmissive carrier such that there is a respective region of photo luminescent material corresponding to a respective one of the light emitters and mounting the carrier to the substrate such that each region of photo luminescent material overlays a respective one of the light emitters. Where the light transmissive carrier comprises a thermo formable material the method can further comprise heating and vacuum molding the carrier such as to form an array of hollow features configured such that a respective feature corresponds to a respective light emitter and is capable of housing a respective light emitter.