Patent ID: 9097395
Filing Date: 2015-08-04
Classification: F21K,F21V,G02B

Abstract:
1. A lens for a light emitting diode (LED) backlight module comprising: a main lens, comprising a light incident surface configured for receiving light emitted from an LED light source and a light exit surface opposite to the light incident surface; and a divergent structure formed on the top of the main lens and being configured for diverging light emerging from the light exit surface of the main lens, and the divergent structure comprising a plurality of annular micro lenses formed on the light exit surface of the main lens; wherein the micro lenses are arranged in a series of concentric circles with regard to a center point located on an optical axis of the main lens, and each micro lens comprises an inner surface and an outer surface connected with the inner surface; and wherein the inner and outer surfaces of each micro lens cooperatively define an angle therebetween, and the angles of the micro lenses increase gradually along a radial direction perpendicular to the optical axis from a center toward an outer periphery of the light exit surface of the main lens.