Patent ID: 11959599
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC F

Claim 4:
5. A lighting system for simulating sunny sky scenes, the lighting system comprising:
a color-tunable light emitting panel resembling the sky;
a tunable white light engine resembling the sun, positioned inside an aperture in the color-tunable light emitting panel; and
an optical element positioned in front of the tunable white light engine, wherein the optical element comprises a microstructure formed on top of or in a transparent substrate or substrates to provide the appearance of the sun,
wherein the optical element includes an inner region, wherein a plurality of dots are formed on the inner region and are arranged on a transparent substrate or substrates in a random distribution, and an outer region, wherein a plurality of dots are formed on the outer region and are arranged in rows and columns separated by constant pitches, and wherein the plurality dots formed on the outer region form two-dimensional gratings to provide the appearance of the sun.