Patent ID: 8840292

Claim:
A backlight module, comprising: a light collector configured to collect ambient light rays from a surrounding environment; a plurality of optical fibers connected to the light collector; a fiber light-outputting substrate connected to the optical fibers, wherein the fiber light-outputting substrate includes a plurality of light-outputting openings configured to output the light rays transmitted by the optical fibers; a light guide plate disposed at one side of the fiber light-outputting substrate; and a light coupling device disposed between the fiber light-outputting substrate and the light guide plate, wherein the light coupling device includes a plurality of light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate, and each of the light diffusion recessions has a first opening length and a second opening length, and the first opening length is larger than the second opening length, and the first opening length is parallel to a longitudinal direction of the light diffusion recessions, and parallel to a longitudinal direction of a light input side surface of the light guide plate, and the second opening length is vertical to the first opening length.