Patent ID: 9519094
Filing Date: 2016-12-13
CPC Classification: G02B

Claim Text:
1. A backlight module, comprising: an ambient light collector for collecting ambient lights; at least one optical fiber connecting to the ambient light collector, the optical fiber comprises a core, a clad layer, and a coating layer, the coating layer is a polymer coating layer, and light emitting ends of the optical fiber are cut to enlarge light emitting angles, wherein the light emitting end of the optical fiber is substantially wedge-shaped or truncated conical-shape, wherein the light emitting end comprises two slopes symmetric to each other with respect to a central axis of the optical fiber, and two short sides of the light emitting surface are arc-shaped; a light emitting plate arranged closely to an optical plate, and the light emitting plate comprises a plurality of through holes; at least one fixing sleeve being received in the through hole; and at least one optical fiber sleeve being fixed within the fixing sleeve and engaging with the light emitting ends of the optical fibers so as to fix the optical fibers on the light emitting plate, wherein the optical fiber sleeve comprises a sleeve portion and an engaging portion, an internal diameter of the engaging portion gradually decreases along a direction from a connecting portion of the sleeve portion and the engaging portion toward an outlet of the engaging portion; and the light emitting angle of the light emitting surface of the optical fiber satisfying the equation: wherein β indicates the light emitting angle of the light emitting surface of the optical fiber, θ indicates the angle between the slope with respect to the central axis of the optical fiber and a horizontal plane of the optical fiber, α indicates the angle between the slope and a direction of a light ray from an internal direction of the optical fiber upon the light emitting end, and n indicates a number of perfect reflections of the light ray upon the slope.