Front light module and display device using the same

A display device, comprising:

• a light source, being capable of emitting an incident light;
• a light guide plate, having a side face and a bottom surface connected to said side face, wherein said light guide plate has a first refractive index and said side face neighbors said light source and receives said incident light;
• a plurality of pillar structures, being placed under said bottom surface of said light guide plate, wherein said pillar structures have a second refractive index and said second refractive index is larger than or equal to said first refractive index;
• an electronic paper device, placed below said pillar structures;
• and
• a fixing frame, used to bond said light guide plate, said pillar structures, and said electronic paper device together, wherein a width of a opening of said fixing frame is smaller than a total thickness of said light guide plate, said pillar structures, and said electronic paper device.