Two-color mixing led illuminating device

Abstract

An LED illuminating device comprises a housing with a base plate, a prism sheet and a circuit board. The prism sheet is mounted in the housing and comprises a number of V-shaped micro-grooves formed thereon along two directions intersecting with each other. The circuit board fixed on the base plate, wherein a plurality of LED units are arranged on the circuit board, each adjacent two of the plurality of LED units are spaced for a preset distance and emit light of different color; four virtual mixed light sources are formed by reflection of the prism sheet to the circuit board when the light emitted by a particular LED unit mixes with light emitted by adjacent LED units on circuit board, each of the virtual mixed light sources forms a desired color different from the light emitted from each LED units.

Dependencies are inferred from the claim text.