摘要:
Various systems and methods facilitate internal communication within a lighting module as well as intercommunication among lighting modules over an external network. The network may be a conventional network managed by a central network controller or may be an ad hoc or “mesh” network—i.e., a scalable network architecture in which any lighting module is a node that can communicate with any other module or network-connected device.
摘要:
Embodiments of the invention provide systems and techniques for analyzing an existing light fixture in its installed environment and, based on the sensed location of the light and its environmental illumination pattern, identifying at least one LED retrofit fixture that may be used to replace the existing light fixture.
摘要:
A control system is disclosed for determining an actual temperature of a light emitting diode. The control system uses conductor that supply power to the light emitting diode to supply a pulse to the light emitting diode. The pulse is determined along with a reaction caused by the pulse and the information gained is used in determination of the light emitting diode die temperature which can then be used in controlling current to the light emitting diode to control the temperature of the light emitting diode.
摘要:
A textured layer of tin oxide on a vitreous substrate in which the thickness and degree of texture of the layer can be controlled independently of one another. The tin oxide fabricated by a process comprising steps of depositing a first film of tin oxide on the substrate by chemical vapor deposition from a first reactant mixture of tin chloride, water, and an alcohol and depositing a second film of tin oxide on the first tin oxide film by chemical vapor deposition from a second reactant mixture of tin chloride and water. Where the substrate is ordinary soda lime glass, it preferably is first coated with a film of silicon dioxide. The process permits deposition of substantially uniform layers of tin oxide in a continuous deposition process.
摘要:
Amorphous p-i-n silicon photovoltaic cells with improved short wavelength photoresponse are fabricated with reduced p-dopant contamination at the p/i interface. Residual p-dopants are removed by flushing the deposition chamber with a gaseous mixture capable of reacting with excess doping contaminants prior to the deposition of the i-layer and subsequent to the deposition of the p-layer.
摘要:
A light device and method for producing an output light beam are disclosed. A light source assembly comprising a plurality of light sources is arranged at the first end of the light device and emits light towards the second end and parallel with the longitudinal axis of the device. The device also has a chamber for mixing light emitted from the light source assembly; and a concave reflecting optic for redirecting light exiting the chamber and emitted onto the optic. The redirected light forms an output light beam. The device also has driver circuitry for controlling drive currents to the plurality of light sources individually or in groups thereof to thereby variably control a divergence of the output light beam.
摘要:
A thin film photovoltaic solar cell which utilizes a zinc phosphide semiconductor is of the homojunction type comprising an n-type conductivity region forming an electrical junction with a p-type region, both regions consisting essentially of the same semiconductor material. The n-type region is formed by treating zinc phosphide with an extrinsic dopant such as magnesium. The semiconductor is formed on a multilayer substrate which acts as an opaque contact. Various transparent contacts may be used, including a thin metal film of the same chemical composition as the n-type dopant or conductive oxides or metal grids.
摘要:
In various embodiments, an illumination device includes a housing, a power connector for connecting the illumination device to a power socket and receiving input power, a light emitter for direct illumination disposed within the housing, a circuit for regulating the input power and providing the regulated power to the light emitter, and a decorative illumination element for providing decorative illumination.
摘要:
Light sources with arrangements of multiple LEDs (or other light-emitting devices) disposed at or near the focus of a reflecting optic and controllable individually or in groups facilitate varying the angular distribution of the light beam (e.g., the beam divergence) via the drive currents supplied to the LEDs.
摘要:
A method of fabricating electrically isolated photovoltaic modules arrayed on a substrate by forming overlying front contact strips, photovoltaic strips, and back contact strips on a flat transparent substrate, laser scribing between modules to electrically isolate adjacent modules for the simultaneous testing and electrical curing of the modules on a single substrate, and plasma etching the inter-module grooves formed by the laser isolation step to improve the percentage of modules on a single substrate that pass minimum performance criteria.Also disclosed is an array of electrically isolated, thin-film semiconductor devices fabricated on a single substrate, wherein adjacent semiconductor devices are separated by laser-scribed grooves extending through the devices to the substrate and the walls of the grooves have been etched by plasma etching.