Lumileds Lighting U.s., LLC

Jason L Posselt

Julian A Carey

Daniel Alexander Steigerwald

William David Collins, Iii

Michael Joseph Ludowise

Robert M Fletcher

William D Collins Iii

Williams David Collins, Iii

A structure includes semiconductor light emitting device and a wavelength converting layer. The wavelength converting layer converts a portion of the light emitted from the semiconductor light emitting device. The dominant wavelength of the combined light from the semiconductor light emitting device and the wavelength converting layer is essentially the same as the wavelength of light emitted from the device. The wavelength converting layer may emit light having a spectral luminous efficacy greater than the spectral luminous efficacy of the light emitted from the device. Thus, the structure has a higher luminous efficiency than a device without a wavelength converting layer.

Light emitting devices with enhanced luminous efficiency

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 &ldquo;yellowing&rdquo; attenuation which would reduce the green-to-near UV light output.

High stability optical encapsulation and packaging for light-emitting diodes in the green, blue, and near UV range

Growing community of inventors

San Jose, CA, United States of America

Jason L Posselt