Patent ID: 11886091
Assignee: E INK CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. A front light module, comprising:
a light guide plate having a top surface, a bottom surface opposite to the top surface, and a light input surface connecting the top surface with the bottom surface;
a light source, disposed beside the light input surface and configured to emit a light beam to the light input surface;
an optical film facing away from an optical surface of the light guide plate has a plurality of optical microstructures, and each of the optical microstructures is a recess, and has a light receiving surface more adjacent to the light input surface and a light back surface further away from the light input surface, wherein the light receiving surface is inclined 20 to 35 degrees with respect to the top surface of the light guide plate, and the light back surface is inclined 70 to 90 degrees with respect to the top surface of the light guide plate; and
a first optical clear adhesive, disposed between the light guide plate and the optical film in a fully bonding manner.