초록 ▼

An LED luminary system for providing power to LED light sources to generate a desired light color comprises a power supply stage configured to provide a DC current signal. A light mixing circuit is coupled to said power supply stage and includes a plurality of LED light sources with red, green and b

An LED luminary system for providing power to LED light sources to generate a desired light color comprises a power supply stage configured to provide a DC current signal. A light mixing circuit is coupled to said power supply stage and includes a plurality of LED light sources with red, green and blue colors to produce various desired lights with desired color temperatures. A controller system is coupled to the power supply stage and is configured to provide control signals to the power supply stage so as to maintain the DC current signal at a desired level for maintaining the desired light output. The controller system is further configured to estimate lumen output fractions associated with the LED light sources based on junction temperature of the LED light sources and chromaticity coordinates of the desired light to be generated at the light mixing circuit. The light mixing circuit further comprises a temperature sensor for measuring the temperature associated with the LED light sources and a light detector for measuring lumen output level of light generated by the LED light sources. Based on the temperatures measured, the controller system determines the amount of output lumen that each of the LED light sources need to generate in order to achieve the desired mixed light output, and the light detector in conjunction with a feedback loop maintains the required lumen output for each of the LED light sources.

대표청구항 ▼

1. An LED luminary system for providing power to LED light sources to generate a desired light color, said LED luminary system comprising:a power supply stage configured to provide a DC current signal; a light mixing circuit coupled to said power supply stage, said light mixing circuit having a plur

1. An LED luminary system for providing power to LED light sources to generate a desired light color, said LED luminary system comprising:a power supply stage configured to provide a DC current signal; a light mixing circuit coupled to said power supply stage, said light mixing circuit having a plurality of LED light sources configured to receive said DC current signal; and a controller system coupled to said power supply stage configured to provide control signals to said power supply stage so as to maintain said DC current signal at a desired level, said controller system further configured to respond to a temperature associated with said LED light sources and to estimate lumen output fractions associated with said LED light sources based on junction temperature of said LED light sources and chromaticity coordinates of said desired light color to be generated at said light mixing circuit.