Fay, Sharpe, Fagan, Minnich & McKee, LLP
Uniform angular light distribution from LEDs
A light source (10) includes a light emitting component (32), such as a UV/blue light emitting diode or laser diode, a layer (46) of a light scattering material (42), and a layer (48) of a phosphor material (44). The phosphor material converts a portion of the light emitted by the light emitting component to light of a longer wavelength, such as yellow light. The scattering material scatters the light emitted by the light emitting component and/or the light converted by the phosphor to improve the overall uniformity of the angular distribution of the light. When combined, the converted and scattered light has a more uniform angular distribution, that is, it maintains the approximately the same color as the viewing angle is changed.
General Electric Company
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inventional inventional additional additional additional inventional additional additional
Anil R. Steven J. Lionel M. Alok M.
Duggal Duclos Levinson Srivastava