Patent ID: 9028128
Filing Date: 2015-05-12
Classification: G02B

Abstract:
1. A side-edge backlight module, comprising a backplane, a light guide plate arranged inside the backplane, a backlight source arranged inside the backplane, and a photo coupler arranged between the light guide plate and the backlight source, whereby light emitting from the backlight source is subjected to light mixing by the photo coupler and then enters the light guide plate so as to improve homogeneity of light illumination of the light guide plate at a location close to a backlight source; wherein the backlight source comprises a printed circuit board and a plurality of light emitting diode (LED) lights that is mounted to the printed circuit board and electrically connected to the printed circuit board, gaps being present between the LED lights; wherein the photo coupler comprises a main body and a plurality of first slots and a plurality of second slots that face the backlight source, the first slots being arranged to correspond to the LED lights, the second slots being arranged to correspond to the gaps between the LED lights; and wherein the first slots are of a shape of inverted trapezoid, which diverges in an inward direction from an edge of the main body of the photo coupler that faces the LED lights, and the second slots are of a shape of triangle, which converges in an inward direction from the edge of the main body of the photo coupler that faces the LED lights.