Patent application number | Description | Published |
20100201241 | THERMAL STORAGE SYSTEM USING ENCAPSULATED PHASE CHANGE MATERIALS IN LED LAMPS - A phase change material (PCM) is used as thermal storage for lighting systems. The PCM is placed in a thermally conductive container in close contact with the lighting system. As the PCM absorbs heat, it changes from a solid to a liquid state, but the temperature of the PCM is clamped at its melting point temperature. For LED-based systems, the PCM is selected to have a melting point such that the junction temperatures of the LEDs in the system are maintained at approximately their optimum operating temperature inside the lighting system housing. Because the thermal conductivity of the molten PCM is poor, a low thermal resistance heat flow path is provided from the PCM to the container. | 08-12-2010 |
20110134645 | LED LAMP ASSEMBLY WITH THERMAL MANAGEMENT SYSTEM - A lighting system is described. The lighting system includes a lamp and a first container including a first phase change material thermally connected to the lamp. Heat generated by the lamp during operation is conducted to the first phase change material. The system also includes a second container including a second phase change material thermally connected to the lamp. Heat generated by the lamp during operation is also conducted to the second phase change material, and the second phase change material has a transition point temperature lower than the transition point temperature of the first phase change material of the first container to account for a temperature drop between the second container and the first container. The lighting system also includes a temperature sensor for reducing lamp power if the lamp becomes too hot, and a mounting bracket which may also conduct heat away from the lamp. | 06-09-2011 |
20110303946 | THERMAL STORAGE SYSTEM USING ENCAPSULATED PHASE CHANGE MATERIALS IN LED LAMPS - A phase change material (PCM) is used as thermal storage for lighting systems. The PCM is placed in a thermally conductive container in close contact with the lighting system. As the PCM absorbs heat, it changes from a solid to a liquid state, but the temperature of the PCM is clamped at its melting point temperature. For LED-based systems, the PCM is selected to have a melting point such that the junction temperatures of the LEDs in the system are maintained at approximately their optimum operating temperature inside the lighting system housing. Because the thermal conductivity of the molten PCM is poor, a low thermal resistance heat flow path is provided from the PCM to the container. | 12-15-2011 |
20120307500 | LED LAMP ASSEMBLY WITH THERMAL MANAGEMENT SYSTEM - A lighting system is described. The lighting system includes a lamp and a first container including a first phase change material thermally connected to the lamp. Heat generated by the lamp during operation is conducted to the first phase change material. The system also includes a second container including a second phase change material thermally connected to the lamp. Heat generated by the lamp during operation is also conducted to the second phase change material, and the second phase change material has a transition point temperature lower than the transition point temperature of the first phase change material of the first container to account for a temperature drop between the second container and the first container. The lighting system also includes a temperature sensor for reducing lamp power if the lamp becomes too hot, and a mounting bracket which may also conduct heat away from the lamp. | 12-06-2012 |
20140168777 | LIGHT DIFFUSERS AND METHODS FOR MANUFACTURING - A linear light module having an optical coupling element and a light pipe is described. The optical coupling element receives light emitted by multiple light emitting diodes (LEDs) having different emission wavelengths and couples the light efficiently to a linear light pipe. The light from the LEDs is efficiently mixed by the optical coupling element and the light pipe to produce a linear light output that is uniform in color and intensity. Light diffusers can be used with the optical coupling element and light pipe at various locations to further enhance the uniformity of the emitted light. Novel techniques for manufacturing the light diffusers that use patterning of a suspension solution or injection molding are described. | 06-19-2014 |
20140169025 | SYSTEM AND METHOD FOR MIXING AND GUIDING LIGHT EMITTED FROM LIGHT EMITTING DIODES TO A LIGHT PIPE FOR EMISSION IN A LINEAR CONFIGURATION - A linear light module having an optical coupling element and a light pipe is described. The optical coupling element receives light emitted by multiple light emitting diodes (LEDs) having different emission wavelengths and couples the light efficiently to a linear light pipe. The light from the LEDs is efficiently mixed by the optical coupling element and the light pipe to produce a linear light output that is uniform in color and intensity. Diffusers can be used with the optical coupling element and light pipe at various locations to further enhance the uniformity of the emitted light. | 06-19-2014 |
20140169026 | THERMAL PATH FOR HEAT DISSIPATION IN A LINEAR LIGHT MODULE - A linear light module that uses a thermally conductive housing for dissipating heat generated by a lighting source within the housing is described. Light is thermally coupled away from the lighting source via a thermally conductive heating block. The heating block is thermally coupled to a thermally conductive heat pipe that runs along the length of the housing, where the length of the housing is substantially the same length as the linear light module. The housing is extruded to include a channel that runs the length of the housing for holding the heat pipe. Because the housing is long, the heat is easily conducted from the housing. | 06-19-2014 |
20160050723 | SYSTEM ARCHITECTURE OF A TUNABLE LAMP SYSTEM - Some embodiments of this disclosure operate a LED-based lamp module in conjunction with a controller, such as a general-purpose mobile device or other light control system. The operations can include producing light at a current correlated color temperature (CCT) from a light source comprising an LED set of different color LEDs; authenticating a connection between a mobile device and the LED-based lamp module; receiving a target CCT for the LED-based lamp module; determining a target LED driving condition that produces the target CCT based on a color mixing plan stored in the LED-based lamp module; and adjusting the current CCT towards the target CCT by adjusting a current LED driving condition towards the target LED driving condition. | 02-18-2016 |