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US 2003/0147242 A1Published application
White LED array
AssigneeWhelen Engineering Company, Inc.
InventorJames L. Stopa
Life of this patent
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Abstract
An LED array is disclosed that provides white light having a warm hue by combining yellow LEDs and white LEDs in the array. The yellow LEDs are typically less expensive than the white LEDs, thereby improving the cost-efficiency of the LED array. A preferred ratio of one yellow LED for every two white LED is disclosed.
Claims7
An illumination array comprising a first plurality of yellow LEDs and a second plurality of white LEDs, wherein the LEDs cooperate to provide a light output having a warm white hue.
A method for constructing an LED array having a warm white hue comprising the steps of:
- arranging a first plurality of yellow LEDs in an array;
- arranging a second plurality of white LEDs adjacent the yellow LEDs in the array.
Dependencies are inferred from the claim text.