Invention Grant
- Patent Title: Light-emitting device with light scatter tuning to control color shift
-
Application No.: US16997338Application Date: 2020-08-19
-
Publication No.: US10971661B2Publication Date: 2021-04-06
- Inventor: Daniel Estrada , Marcel Rene Bohmer , Jacobus Johannes Francisus Gerardus Heuts , Kentaro Shimizu , Michael David Camras
- Applicant: LUMILEDS LLC
- Applicant Address: US CA San Jose
- Assignee: LUMILEDS LLC
- Current Assignee: LUMILEDS LLC
- Current Assignee Address: US CA San Jose
- Main IPC: H01L33/50
- IPC: H01L33/50 ; H01L33/62 ; H01L33/56

Abstract:
A system and methods for light-emitting diode (LED) devices with a dimming feature that can tailor a color point shift in the light color temperature of a scattering/transparent layer to enlarge a dim to warm range are disclosed herein. A light-emitting device may include a wavelength converting structure configured to receive light from a light emitting semiconductor structure and an adjacent light scattering structure. The light scattering structure may comprise a plurality of scattering particles with a lower refractive index (RI) than the RI of the matrix material in which the scattering particles are disposed. The wavelength converting structure may include a red phosphor and a green phosphor such that to adjust overlap between green emission and absorption by the red phosphor to correspondingly adjust scattering and magnitude of color shift. In an embodiment, the light scattering structure may be integrated in the wavelength converting structure.
Public/Granted literature
- US20200381598A1 LIGHT-EMITTING DEVICE WITH LIGHT SCATTER TUNING TO CONTROL COLOR SHIFT Public/Granted day:2020-12-03
Information query
IPC分类: