Backlight module and display device

摘要

A backlight module and a display device having the backlight module are disclosed. The backlight module includes tricolor light sources, a light combining unit, a linear reflection unit, and a two-dimension reflection unit. The light combining unit is configured to combine tricolor beams to a white light beam. The linear reflection unit includes a plurality of first micro electro mechanical systems (MEMS) reflectors arranged in a line, and is configured to periodically reflect white light beams. The two-dimension reflection unit includes a plurality of second MEMS reflectors arranged in rows and columns, and the second MEMS reflectors in each row faces and interacts with a first MEMS reflector. The second MEMS reflectors are configured to periodically reflect light beams emitted from the linear reflection unit, to form a surface light source.

主权项

1. A backlight module, comprising:
a plurality of tricolor light sources; a light combining unit configured to combine the tricolor light beams emitted from the plurality of tricolor light sources into a white light beam; a linear reflection unit comprising a plurality of first micro electro mechanical systems (MEMS) reflectors arranged in a line, and configured to periodically reflect light beams emitted from the light combining unit, wherein the light beams emitted from the first micro electro mechanical systems reflectors perpendicular to a line wherein the first micro electro mechanical systems reflectors being arranged; and a two-dimension reflection unit comprising a plurality of second micro electro mechanical systems reflectors arranged in rows and columns, each column coupling to a corresponding one of the plurality of first micro electro mechanical systems reflectors and facing a light emitting side of a corresponding first micro electro mechanical systems reflector, wherein the plurality of the second micro electro mechanical systems reflectors in each row being equal to the number of the first micro electro mechanical systems reflector, the second micro electro mechanical systems reflectors configured to periodically reflect light beams emitted from the linear reflection unit, the light beams emitted from the second MEMS reflectors perpendicular to the two-dimension reflection unit, to form a surface light source; wherein each of the second micro electro mechanical systems reflectors comprises a second rotatable shaft and a second reflection surface, the second rotatable shaft is parallel with the emitting direction of the white light beam emitted from the light combining unit.