LIGHT-EMITTING DIODE UNIT Russian patent published in 2014 - IPC H01L33/50 

FIELD: physics, optics.

SUBSTANCE: LED unit, having a LED chip (10), a phosphor layer (12) and a filter layer (14), which is arranged such that light rays emitted from the LED chip (10), with a radiation angle less than a predetermined angle to the normal of the filter, are at least partially reflected, and light rays emitted from the LED chip higher than said predetermined angle to the normal of the filter layer (14) are transmitted.

EFFECT: invention enables to make a LED unit which solves the problem of yellow ring without reducing the efficiency of the LED unit.

14 cl, 2 tbl, 5 dwg