US Patent No. 10,324,359

THIN LED FLASH FOR CAMERA


Patent No. 10,324,359
Issue Date June 18, 2019
Title Thin Led Flash For Camera
Inventorship Mark Melvin Butterworth, Santa Clara, CA (US)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,324,359

1. A light emitting device comprising:a support structure;
a light emitting diode (LED) die mounted on the support structure,
the LED die having a top surface and at least one side surface and comprising LED semiconductor layers and a transparent substrate, the LED semiconductor layers having a thickness and the transparent substrate having a thickness, the substrate comprising the top surface of the LED die, a ratio of substrate thickness to the LED semiconductor layers thickness being 2 or greater and the ratio of the area of the side surface to the area of the top surface being 1 or greater;
a phosphor layer covering the top surface and side surfaces;
a reflector surrounding the LED die, the reflector having curved surfaces surrounding the LED, wherein the curved surfaces extend from a generally rectangular opening for the LED die and reflect the light from the side surfaces of the LED die to form a generally rectangular beam;
a generally rectangular lens affixed to walls of the reflector, the lens having a generally rectangular convex surface extending toward the LED die and a flat top surface facing away from the LED die; and
a thickness from a bottom surface of the support structure to the flat top surface of the lens being 2 mm or less.