摘要:
A solid state lighting apparatus can include a variable color input signal configured to indicate a target color of light output from the apparatus. A string current Pulse Width Modulation (PWM) controller circuit can be coupled to the variable color input signal, where the string current PWM controller circuit can be configured to generate a plurality of PWM signals having respective variable duty cycles to enable/disable respective particular string currents for respective variable times as the variable color input signal changes.
摘要:
A sensor module for a lighting fixture includes a housing configured to be mounted to a lighting fixture, a light sensor mounted in the housing, and a sensor cover over the light sensor. The sensor cover includes a parallel surface and an angled surface. The parallel surface is parallel to a task surface within an area of interest, and includes a first number of lens sections, each of which are configured to focus light from a different portion of a first subset of the task surface to the light sensor. The angled surface includes a second number of lens sections, each of which extend from an edge of the parallel surface to form a facet of the angled surface and are configured to focus light from a different portion of a second subset of the task surface to the light sensor.
摘要:
An optical waveguide body includes first and second pluralities of light extraction features disposed on a first side of the waveguide body and adapted to direct light out of the waveguide body through a second side of the waveguide body opposite the first side. Each of the first plurality of light extraction features has a linear shape and each of the second plurality of light extraction features has at least one of a piecewise linear shape and a nonlinear shape. The piecewise linear shape comprises two adjacent planar surfaces with an angle therebetween of at least about 30 and at most about 180 degrees. The waveguide body further has a light coupling cavity.
摘要:
Solid state fixtures and packages are disclosed that include an optical element, such as an encapsulant, having an integrated indicator which indicates one or more characteristics of the package to a user, such as package orientation, polarity, chip-type, etc. The host optical element can be substantially symmetrical but for the indicator. Indicators can be additive, such as a bump, or subtractive, such as a hole. The indicator can be visible to the human eye, and/or can be machine detectable, such as by pick-and-place technology. Indicators can be formed by many processes including molding and laser ablation/imprinting, which is particularly suited for use with a hard host material.
摘要:
An LED apparatus which includes (a) an electrical circuit board having an electrically-insulated substrate with conductive zones laminated thereon, (b) a selectively-applied dielectric layer, such as a solder-mask layer, deposited or otherwise adhered to portions of the circuit board, the dielectric layer having a thickness and material composition sufficient such that the fire and electrical enclosure requirements of UL8750, UL746E and UL746C are met, and (c) one or more LEDs connected to the circuit board at designated connection sites thereon.
摘要:
An optical waveguide body includes first and second pluralities of light extraction features disposed on a first side of the waveguide body and adapted to direct light out of the waveguide body through a second side of the waveguide body opposite the first side. Each of the first plurality of light extraction features has a linear shape and each of the second plurality of light extraction features has at least one of a piecewise linear shape and a nonlinear shape. The piecewise linear shape comprises two adjacent planar surfaces with an angle therebetween of at least about 30 and at most about 180 degrees. The waveguide body further has a light coupling cavity.
摘要:
A solid state lighting apparatus can include a variable color input signal configured to indicate a target color of light output from the apparatus. A string current Pulse Width Modulation (PWM) controller circuit can be coupled to the variable color input signal, where the string current PWM controller circuit can be configured to generate a plurality of PWM signals having respective variable duty cycles to enable/disable respective particular string currents for respective variable times as the variable color input signal changes.
摘要:
A lighting device comprising first and second groups of solid state light emitters, that emit light having approximate dominant wavelength (in nm) of 441-448 (or 442-450, 444-455, 444-446, 442-445 or 444-452) and 555 nm to 585 nm, respectively. If the first and second groups are illuminated, a mixture of light would, in the absence of any additional light, have a color point within one or more of first, second, third, fourth and fifth areas on the 1931 CIE Chromaticity Diagram. In some embodiment, the lighting device further comprises a third group that emits light having approximate dominant wavelength (in nm) of 600-640 (or 605-610, 605-607, 600-606, 602-606 or 615-620). Also, methods of lighting.