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

FIELD: physics, optics.

SUBSTANCE: invention pertains to optical instrument-making. The LED device according to the invention includes one or more emitter chips arranged arbitrarily on a single flat substrate and coated with a common layer of a compound gel, optionally with phosphor crystals, and a plate made of optical material placed on the flat surface of the gel without an air space. On the inner side of the plate bordering with the gel, there are mutually perpendicular grooves whose faces are inclined to the surface of the gel at an angle α=55°…65°, and the depth of the grooves is not more than h=0.8 mm. The vertices of the grooves form squares, the length of the sides of which is D=(1.75…2.3)D_c, where D_c is the size of the side of the chip, wherein D=D₀, where D₀ is the distance between optical axes of the emitter chips, wherein optical axes of the squares of the incision and corresponding chips coincide.

EFFECT: invention improves energy parameters of the device, specifically considerable increase in axial luminous intensity and low energy losses owing to increase in the radiation capturing angle of the chip to σ₁=±75°.

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