Patent application number | Description | Published |
20080278092 | HIGH POWER FACTOR LED-BASED LIGHTING APPARATUS AND METHODS - Power control methods and apparatus in which a switching power supply provides power factor correction and an output voltage to a load via control of a single switch, without requiring any feedback information associated with the load. The single switch may be controlled without monitoring either the output voltage across the load or a current drawn by the load, and/or without regulating either the output voltage across the load or the current drawn by the load. The RMS value of an A.C. input voltage to the switching power supply may be varied via a conventional A.C. dimmer (e.g., using either a voltage amplitude or duty cycle control technique) to in turn control the output voltage. The switching power supply may comprise a flyback converter configuration, a buck converter configuration, or a boost converter configuration, and the load may comprise an LED-based light source. | 11-13-2008 |
20080285271 | LED-BASED FIXTURES AND RELATED METHODS FOR THERMAL MANAGEMENT - LED-based lighting fixtures suitable for general illumination in surface-mount or suspended installations, in which heat dissipation properties of the fixtures are significantly improved by decreasing thermal resistance between LED junctions and the ambient air. In various examples, improved heat dissipation is accomplished by increasing a surface area of one or more heat-dissipating elements proximate a trajectory of air flow through the fixture. In one aspect, various structural components of the fixtures are particularly configured to create and maintain a “chimney effect” within the fixture, resulting in a high air-flow rate, natural convection cooling system capable of efficiently dissipating the waste heat from the fixture without active cooling. | 11-20-2008 |
20090050908 | Solid state lighting component - An LED component according to the present invention comprising an array of LED chips mounted on a submount with the LED chips capable of emitting light in response to an electrical signal. The array can comprise LED chips emitting at two colors of light wherein the LED component emits light comprising the combination of the two colors of light. A single lens is included over the array of LED chips. The LED chip array can emit light of greater than 800 lumens with a drive current of less than 150 milli-Amps. The LED chip component can also operate at temperatures less than 3000 degrees K. In one embodiment, the LED array is in a substantially circular pattern on the submount. | 02-26-2009 |
20110101889 | METHODS AND APPARATUS FOR DETERMINING RELATIVE POSITIONS OF LED LIGHTING UNITS - Methods and apparatus for determining the relative electrical positions of lighting units ( | 05-05-2011 |
20110285292 | LED-BASED LUMINAIRES FOR LARGE-SCALE ARCHITECTURAL ILLUMINATION - Disclosed herein are exterior architectural fixtures employing LED-based light sources that are capable of projecting light over long distances and providing a wide variety of lighting effects with high lumen output. These lighting fixtures have improved heat dissipation properties and are particularly suitable for large-scale façade washing and for illuminating large architectural structures, such as skyscrapers, casinos, and retail establishments, integrating efficient and compact power supply and control components for driving high-intensity LEDs to achieve a vast variety of lighting effects on a large scale. | 11-24-2011 |
20120235585 | METHOD AND APPARATUS SELECTIVELY DETERMINING UNIVERSAL VOLTAGE INPUT FOR SOLID STATE LIGHT FIXTURES - A device for detecting a dimmer phase angle set by operation of a dimmer for a solid state lighting load includes a processor having a digital input, a first diode connected between the digital input and a voltage source and a second diode connected between the digital input and ground. The device further includes a first capacitor connected between the digital input and a detection node, a second capacitor connected between the detection node and ground, and a resistance connected between the detection node and a rectified voltage node, which receives a rectified voltage from the dimmer. The processor is configured to sample digital pulses at the digital input based on the rectified voltage and to identify the dimmer phase angle based on lengths of the sampled digital pulses. | 09-20-2012 |
Patent application number | Description | Published |
20080204268 | METHODS AND APPARATUS FOR CONVEYING INFORMATION VIA COLOR OF LIGHT - Methods and apparatus for conveying information. One or more information signals representing scalar or numeric information that is not associated with color is/are received from a data base, a network, the World Wide Web, or a software program. The information signal(s) is/are converted into one or more illumination control signals representing at least color information, and a color of illumination generated by one or more LED-based light sources is controlled in response to the illumination control signal(s) so as to convey the scalar or numeric information via at least the color of the generated illumination. | 08-28-2008 |
20100127634 | METHODS AND APPARATUS FOR CONVEYING INFORMATION VIA COLOR OF LIGHT - Methods and apparatus for conveying information. One or more information signals representing scalar or numeric information that is not associated with color is/are received from a data base, a network, the World Wide Web, or a software program. The information signal(s) is/are converted into one or more illumination control signals representing at least color information, and a color of illumination generated by one or more LED-based light sources is controlled in response to the illumination control signal(s) so as to convey the scalar or numeric information via at least the color of the generated illumination. | 05-27-2010 |
20100148689 | SYSTEMS AND METHODS FOR CALIBRATING LIGHT OUTPUT BY LIGHT-EMITTING DIODES - A system and method for calibrating light output from an LED is provided. The system includes a support on which an LED is positioned, a photosensor to measure the light output from the LED, and means for calibrating and adjusting the light output of the LED. Calibration is accomplished by measuring the light output from the LED, comparing such output against a reference value, and adjusting the measured output against the reference value. | 06-17-2010 |
20100171145 | LED PACKAGE METHODS AND SYSTEMS - Methods and systems are provided for LED modules that include an LED die integrated in an LED package with a submount that includes an electronic component for controlling the light emitted by the LED die. The electronic component integrated in the s submount may include drive hardware, a network interface, memory, a processor, a switch-mode power supply, a power facility, or another type of electronic component. | 07-08-2010 |
20100207534 | INTEGRATED LED-BASED LUMINARE FOR GENERAL LIGHTING - Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing. | 08-19-2010 |
20110031888 | METHODS AND APPARATUS FOR CONTROLLING RESPECTIVE LOAD CURRENTS OF MULTIPLE SERIES-CONNECTED LOADS - A lighting apparatus ( | 02-10-2011 |