A light emitting device comprises an LED emitting ultraviolet or blue light and one or more phosphors excited by the ultraviolet or blue light and in response emitting longer wavelength light to provide a combined phosphor emission spectrum having an emission peak at wavelength λpk with a full width at half maximum of FWHM. With λpk and FWHM expressed in nm, 525 nm≥λpk≥0.039*FWHM+492.7 nm. The light emitting device may be used, for example, to signal the autonomous driving state of an automobile.
Cyan phosphor-converted LED module
13.07.2021
Patent
Elektronische Ressource
Englisch
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H01L Halbleiterbauelemente , SEMICONDUCTOR DEVICES / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES |
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