Patent ID: 11921314
Assignee: RADIANT OPTO-ELECTRONICS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. A backlight module, comprising:
a light guide plate having a light incident surface and a light exiting surface opposite to the light incident surface, wherein the light exiting surface has a normal line;
a plurality of prism sheets, wherein each of the prism sheets includes plural parallel prism lenticulars;
a light source adjacent to the light incident surface, wherein the light source has a plurality of light-emitting diodes; and
an optical film located between the prism sheets and the light exiting surface and comprising:
a plurality of parallel prisms, wherein an extending direction of each of the prisms is perpendicular to the normal line, and each of the prisms faces the light exiting surface of the light guide plate; and
a plurality of microstructures, and each of the microstructures being located on a surface of the optical film which faces away from the light guide plate, wherein each of the microstructures has a pyramid structure with a plurality of facets, and the prisms are located between the microstructures and the light exiting surface;
wherein the light exiting surface is connected to one side of the light incident surface; and
wherein the extending direction of the prisms is non-parallel to an arranged direction of the light-emitting diodes and parallel to an extending direction of the prism lenticulars of one of the prism sheets.