Backlight module, light guide plate thereof and ink thereof

A light guide plate comprising:

• a light guide plate body, having a first surface;
• and
• an ink disposed on the first surface of the light guide plate body, the ink comprising:
• a base resin;
• and
• an additive, dispersed in the base resin for increasing the printability of the ink, and comprising a polymer having hydroxy functional group, ester functional group, ether functional group or combination thereof.

A backlight module comprising:

• a light source, for providing a light beam;
• a light guide plate, for receiving and mixing the light beam from the light source, the light guide plate comprising:
• a light guide plate body, having a first surface and a second surface;
• and
• an ink disposed on the first surface of the light guide plate body, the ink comprising:
• a base resin;
• and
• an additive, dispersed in the base resin for increasing the printability of the ink, and comprising a polymer having hydroxy functional group, ester functional group, ether functional group or combination thereof;
• a reflector, disposed below the light guide plate, and being used to reflect part of the light beam back to the light guide plate;
• and
• an diffusion film, disposed above or on the light guide plate, and being used to diffuse the light beam from the second surface of the light guide plate body.