High stability optical encapsulation and packaging for light-emitting diodes in the green, blue, and near UV range
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United States of America Patent
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Jul 8, 2003
Issued Date -
N/A
app pub date -
Feb 2, 2001
filing date -
Nov 6, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An LED component is provided, with light emission in the green-to-near UV wavelength range. The light-emitting semiconductor die is encapsulated with one or more silicone compounds, including a hard outer shell, an interior gel or resilient layer, or both. The silicone material is stable over temperature and humidity ranges, and over exposure to ambient UV radiation. As a consequence, the LED component has an advantageously long lifetime, in which it is free of 'yellowing' attenuation which would reduce the green-to-near UV light output.
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