LENS, LED BACKLIGHT MODULE AND DISPLAY DEVICE

摘要

FIELD: electricity.SUBSTANCE: lens comprises the lower surface; the surface of light incidence to receive light from a light source; the first convex surface used as the first surface of the light output; the first circular inclined surface used as the second surface of the light output; the second convex surface used as the third surface of the light output. The first, second and third surfaces of the light output are connected in series in the top to bottom and inside-out direction. The second and third surfaces of the light output are tangent and form the first step. The surface of light incidence is represented by an inner concave surface, which tangents of generatrix lines cross its line of rotation and form the first adjacent angles. The first surface of light output is the convex surface with a central dip, which tangents of generatrix lines cross its line of rotation and form the second adjacent angles. The second surface of light output crosses the lower surface and forms the third adjacent output angle.EFFECT: increasing uniformity of the beam at the output from the lens.11 cl, 6 dwg