Realization of high-quality light output based on a novel LED packaging

A white LED modeling method is proposed to implement the colorimetric simulation and a novel LED packaging integrated with a specific freeform lens is designed to realize the high-quality light output. High angular color uniformity (ACU) is achieved by mixing the central bluish white light and the marginal yellowish white light via the specific freeform lens. Based on the white LED modeling method, the angular colorimetric characteristics of the LED packaging can be obtained and demonstrate that the AC U in terms of angular correlated color temperature (CCT) deviation is improved from 580K to 204K compared with the traditional LED packaging. Furthermore, experiment is conducted and results show a good accordance with the simulation. The novel LED package presents not only an improved ACU, but also a noninferior luminous flux compared with the hemispherical LED packaging.