公开(公告)号：US20140159084A1

公开(公告)日：2014-06-12

申请号：US13804309

申请日：2013-03-14

Applicant: CREE, INC.

Inventor： Mario Castillo ,  Kurt Wilcox

IPC: H01L33/58 ,  H01L33/54

CPC classification number: H01L33/58 ,  H01L33/54 ,  H01L2933/0058

Abstract: A light emitting diode (LED) package comprising an encapsulant designed to improve color spatial uniformity in comparison to hemispherical encapsulants is described. In some embodiments, the encapsulant comprises a segment of a hemisphere as a lower portion and an upper portion of a second shape. In some embodiments this second shape is defined by a spline curve. The encapsulant improves color uniformity over a wide range of angles while only minimally affecting other attributes such as photometric polar distribution, extraction efficiency, and luminous intensity. Embodiments of the present invention can also utilize light emitting systems comprising such LED packages.

Abstract translation: 描述了与半球形密封剂相比，包括设计用于改善颜色空间均匀性的密封剂的发光二极管（LED）封装。 在一些实施例中，密封剂包括作为下部的半球的段和第二形状的上部。 在一些实施例中，该第二形状由样条曲线定义。 密封剂在宽范围的角度改善颜色均匀性，同时仅最小程度地影响其他属性，例如光度极性分布，提取效率和发光强度。 本发明的实施例还可以使用包括这种LED封装的发光系统。