Patent ID: 7918590

Claim:
A composite lens plate, applied in a light emitting diode (LED) lighting device having a plurality of LEDs, the composite lens plate comprising: a substrate; and a plurality of refractive elements, disposed on the substrate and one-to-one corresponding to the LEDs, wherein each refractive element has a refractive property, the refractive elements are classified into at least two types of lenses according to the refractive property, the refractive elements of lenses of the same type have substantially the same refractive property, the refractive property of the refractive elements of lenses of one type is substantially different from the refractive property of the refractive elements of lenses of another type, the two types of lenses comprise a first type of lenses and a second type of lenses, surfaces of the refractive elements of the first type of lenses are each an elliptical curved surface, and surfaces of the refractive elements of the second type of lenses are each an elliptical curved surface having a cone-shaped concave top end.