CPC G02B 6/0043 (2013.01) | 20 Claims |
1. A front light module, comprising:
a reflective display device;
a light emitting unit configured to emit light; and
a front light guide plate located over the reflective display device and includes a micro-structure, and the micro-structure is recessed or convex, wherein a first angle is between a surface of the micro-structure close to the light emitting unit and an upper surface of the front light guide plate, a second angle is between a surface of the micro-structure away from the light emitting unit and the upper surface of the front light guide plate, and a third angle is between the surface of the micro-structure close to the light emitting unit and the surface of the micro-structure away from the light emitting unit, wherein the first angle is in a range between 30 degrees and 60 degrees, the second angle is in a range between 30 degrees and 59 degrees, and the third angle is greater than 90 degrees, wherein a footprint of the micro-structure on the upper surface of the front light guide plate has an asymmetrical and general dumbbell shape in a top view.
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