Patent application number | Description | Published |
20080224025 | Step-wise intensity control of a solid state lighting system - A solid state lighting system controls overall light output level in a step-wise manner by discretely controlling the ON/OFF state of its light emitters. Solid state emitters that are ON at a given time are set and kept at a level intended to produce a desired output characteristic, e.g. at a level to produce a described color of light. The system utilizes optical processing of the generated light, for example by diffuse reflection in an optical integrating cavity, sufficient to convert the point source output(s) from the emitting elements into a uniform virtual source output. The virtual source output appears uniform regardless of how many emitters are ON or OFF, and only the perceptible intensity of the light output changes with the number of emitters that the system has ON. | 09-18-2008 |
20080225520 | Set-point validation for color/intensity settings of light fixtures - Disclosed examples of lighting systems having at least three light sources of different colors may be controlled by validating input settings representing chromaticity and/or intensity of desired light to be generated by determining if the respective lighting system is capable of generating the desired light. This may involve comparing the chromaticity and/or intensity to a three-dimensional gamut representing chromaticity and associated intensities that the lighting system is capable of generating. The top contour of the gamut represents the maximum intensities for every chromaticity which the lighting system is capable of generating. Specifically the top contour is defined by points representing the maximum attainable intensities that each light source is capable of generating and the maximum intensity attainable by the lighting system. | 09-18-2008 |
20080228508 | Monitoring connect time and time of operation of a solid state lighting device - Techniques are disclosed to monitor the time of operation of a solid state lighting system, e.g. for warranty purposes. Examples are disclosed that measure time of system connection to power and/or time of light output from the solid state emitter(s) of the system. A service under the warranty is provided if operation time does not exceed the warranty eligibility criteria, e.g. maximum limit(s). The service provided under the warranty may be pro-rated based on the time of operation. | 09-18-2008 |