Color-Tunable Light Emitting Device
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United States of America Patent
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Issued Date -
Dec 31, 2015
app pub date -
Jun 27, 2014
filing date -
Jun 27, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
One aspect of the present invention is directed to a color-tunable light source including a light emitting diode die segmented into a plurality of sub-light emitting diode regions, at least one of the plurality of light emitting regions defining a first zone and at least one of the plurality of light emitting regions defining a second zone, a color conversion material such as phosphor material covering at least a top surface of each light emitting region in the first zone, a first electrical contact connected to a light emitting region in the first zone, and a second electrical contact connected to a light emitting region in the second zone. A current applied to the first electrical contact drives the light emitting regions in the first zone and a second current applied to the second electrical contact drives the light emitting regions in the second zone. In one embodiment the light source further includes a second color conversion material covering each of the light emitting regions in the first zone and the second zone. In another embodiment, the light source further includes a second color conversion material covering at least a top surface of each of the light emitting regions in the second zone.
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