US 12,140,278 B2
Optical filters compensating for changes in performance of next generation LEDs compared to legacy devices
Antonio Lopez-Julia, Aachen (DE); Thomas Diederich, Stolberg (DE); Rémi Guillebot, Aachen (DE); Aimi Abass, Aachen (DE); and Niels Jeroen van der Veen, Aachen (DE)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by LUMILEDS LLC, San Jose, CA (US)
Filed on May 31, 2024, as Appl. No. 18/680,049.
Application 18/680,049 is a continuation of application No. PCT/US2022/049942, filed on Nov. 15, 2022.
Claims priority of provisional application 63/286,196, filed on Dec. 6, 2021.
Prior Publication US 2024/0318793 A1, Sep. 26, 2024
Int. Cl. F21K 9/64 (2016.01); F21Y 115/10 (2016.01)
CPC F21K 9/64 (2016.08) [F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining angle and wavelength dependent flux data characterizing a light output radiation intensity pattern through a light output surface of a first light emitting device during operation of the first light emitting device, the first light emitting device comprising a light emitting semiconductor diode structure and a wavelength converting structure;
obtaining angle and wavelength dependent flux data characterizing a light output radiation intensity pattern through a light output surface of a second light emitting device during operation of the second light emitting device, the second light emitting device comprising a light emitting semiconductor diode structure and a wavelength converting structure;
determining or having another determine angle and wavelength dependent transmission properties characterizing an optical filter configured to filter the light output radiation intensity pattern of the second light emitting device to provide a filtered light output radiation intensity pattern characterized by angle and wavelength dependent flux data matching the angle and wavelength dependent flux data characterizing the light output radiation intensity pattern of the first light emitting device; and
manufacturing or having another manufacture an interferometric photonic bandgap filter having the determined angle and wavelength dependent transmission properties.