Array of Light Emitting Devices to Produce a White Light Source
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United States of America Patent
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app pub date -
Apr 7, 2008
filing date -
Nov 12, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device is provided with an array of a plurality of phosphor converted light emitting devices (LEDs) that produce broad spectrum light. The phosphor converted LEDs may produce light with different correlated color temperature (CCT) and are covered with an optical element that assists in mixing the light from the LEDs to produce a desired correlated color temperature. The phosphor converted LEDs may also be combined in an array with color LEDs. The color LEDs may be controlled to vary their brightness such that light with an approximately continuous broad spectrum is produced. By controlling the brightness of the color LEDs, light can be produced with a fixed brightness over a large range of white points with a high color rendering quality.
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