High temperature LED system using an AC power source
First Claim
1. An LED system for coupling to an AC power source comprising:
- a rectifier module electrically coupled to the AC power source and configured to provide a rectified output;
a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output;
a second group of LED devices electrically coupled to the first group of LED devices;
a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices; and
a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature.
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Accused Products
Abstract
An LED lighting system powered by an AC power source comprising a rectifier module configured to provide a rectified output to a first group of LED devices and a second group of LED devices electrically coupled to the first group of LED devices. A current monitor module electrically coupled to the first group and to the second group of LED devices is configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices. The current monitor module is electrically coupled to a temperature sensing module that is configured to generate at least one compensation factor based at least in part on a temperature. The compensation factor is used to control (directly or indirectly) current through the LED devices.
169 Citations
20 Claims
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1. An LED system for coupling to an AC power source comprising:
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a rectifier module electrically coupled to the AC power source and configured to provide a rectified output; a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output; a second group of LED devices electrically coupled to the first group of LED devices; a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices; and a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An LED system for coupling to an AC power source comprising:
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a rectifier module being electrically coupled to the AC power source and configured to provide a rectified output; a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output; a second group of LED devices electrically coupled to the first group of LED devices; a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices; a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature; and an LED submount having a front surface and a back surface, the front surface comprising an inner region and an outer region, the inner region being characterized by a reflectivity of at least 80%.
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20. An LED system for coupling to an AC power source comprising:
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a rectifier module being electrically coupled to the AC power source and configured to provide a rectified output; a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output; a second group of LED devices electrically coupled to the first group of LED devices; a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices; a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature; an LED submount having a front surface and a back surface, the front surface comprising an inner region and an outer region, the inner region being characterized by a reflectivity of at least 80%.the first and second groups of LED devices being disposed on the inner region; and a heat sink coupled to the LED submount, the heat sink being characterized by a thermal emissivity of at least 0.5.
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Specification