公开(公告)号：US09711688B2

公开(公告)日：2017-07-18

申请号：US14516610

申请日：2014-10-17

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Daniel Roitman ,  Mark Melvin Butterworth ,  Matthias Heidemann ,  Hans Helmut Bechtel ,  Danielle Russell Chamberlin ,  Joan Liu

IPC: H01L33/50 ,  H01L33/46 ,  H01L33/60

CPC classification number: H01L33/46 ,  H01L33/60

Abstract: A light emission device comprising a light emitting element, a wavelength conversion (e.g. phosphor) element, and a filter that reduces Color over Angle (CoA) effects by at least partially reflecting light from the light emitting element that strike the filter at near-normal angles of incidence. In some embodiments, a combined phosphor and filter layer is formed over the LED die. The filter may comprise a dispersion of self-aligning moieties, such as dielectric platelets in a film that is vacuum laminated to the LED structure. Xirallic® Galaxy Blue pigment, comprising an aluminum oxide core coated on both sides with thin films of SnO2, and TiO2, and Ronastar® Blue, comprising Calcium Aluminum Borosilicate and TiO2 may provide the dielectric platelets.