초록 ▼

The present invention describes a method and luminaire for driving an array of LEDs with at least one LED in each of a plurality of colors in a luminaire. This method controls the light output and color of the LEDs by measuring color coordinates for each LED light source for different temperatures,

The present invention describes a method and luminaire for driving an array of LEDs with at least one LED in each of a plurality of colors in a luminaire. This method controls the light output and color of the LEDs by measuring color coordinates for each LED light source for different temperatures, storing the expressions of the color coordinates as a function of the temperatures, deriving equations for the color coordinates as a function of temperature, calculating the color coordinates and lumen output fractions on-line, and controlling the light output and color of said LEDs based upon the calculated color coordinates and lumen output fractions.

대표청구항 ▼

1. A method for driving an array of LEDs comprising at least one LED in each of a plurality of colors in a luminaire comprising the steps of:supplying electrical current to said LEDs in each said color, such that said LEDs have a light output with a nominal continuous value during ordinary operation

1. A method for driving an array of LEDs comprising at least one LED in each of a plurality of colors in a luminaire comprising the steps of:supplying electrical current to said LEDs in each said color, such that said LEDs have a light output with a nominal continuous value during ordinary operation; measuring CIE xy coordinates for each LED light source for different temperatures; storing the expressions of the CIE xy coordinates as a function of the temperatures; deriving equations for the CIE x and CIE y coordinates as a function of temperature; calculating the CIE xy coordinates and lumen output fractions on-line; and controlling the light output and color of said LEDs based upon the calculated CIE xy coordinates and lumen output fractions.