LIGHT-EMITTING DIODE DEVICE Russian patent published in 2014 - IPC H01L33/58 

FIELD: physics, optics.

SUBSTANCE: invention relates to optical instrument-making and specifically to a class of powerful LEDs used as alternatives to halogen lamps, as well as for overhead, industrial, facade and other illuminators. The LED device consists of one or more emitter chips arbitrarily arranged on a single flat substrate and coated with a common layer of a compound gel, optionally with phosphor crystals, wherein over each chip, the surface bordering with the air is spherical or aspherical with a radius at the peak of not more than 4 mm. The diameter of this surface D=(1.75…2.3)D_c, where D_c is the size of the emitting surface of the chip, wherein optical axes of said surfaces coincide, and the distance from the surface of the chip to the peak of the surface bordering with the air is not more than d=1.5 mm. The surface bordering with the air can have, over each chip around the entire periphery of the surface of the device, a limiting dimension D, wherein the height h and the width t of said device is not more than (0.1…0.15)D. The surface bordering with the air can be made on a plane-convex lens made of any optical material, including from organic glass, which is placed on the compound gel over the chip without an air space.

EFFECT: invention improves energy parameters of the device, and particularly considerably increases axial luminous intensity owing to increase in the radiation capturing angle of the chip to σ₁=±65°, wherein chip losses are reduced to δE=6%.

3 cl, 4 dwg