Patent ID: 11860476
Assignee: ENTIRE TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A diffusion plate capable of being assembled to a backlight module; said backlight module comprising a substrate and a plurality of light-emitting elements arranged in an array on the substrate; said diffusion plate being located above the substrate and comprising:
a plate body; said plate body having an upper surface and a lower surface;
a plurality of pyramid-like structures, arranged in an array on the upper surface of the plate body;
wherein, each said pyramid-like structure comprises:
a bottom surface, the bottom surface is rectangular and has four vertices and four bottom edges;
a first convex portion, said first convex portion protrudes upward from the bottom surface by a first height; the first convex portion includes four first side-edges extending obliquely upward from the four vertices of the bottom surface, respectively; the four first side-edges of the first convex portion are not only equal in length but also extend upward at a same first inclination angle; wherein an angle between two opposite said first side-edges is a first vertex angle;
a second convex portion, protrudes upward from a top of the first convex portion to a second height; the second convex portion includes four second side-edges extending obliquely upward from top-ends of the four first side-edges of the first convex portion; the four second side-edges of the second convex portion are not only equal in length but also extend upward at a same second inclination angle; wherein an angle between two opposite said second side-edges is a second vertex angle;
wherein, the first vertex angle is not equal to the second vertex angle, and therefore, the pyramid-like structure has multiple vertex angles;
wherein, the light-emitting elements comprises a first light-emitting element; the first light-emitting element is substantially located below a center point of the bottom surface of one of the pyramid-like structures corresponding to the first light-emitting element, and emits light substantially upward toward the corresponding pyramid-like structure;
wherein, the first convex portion of the corresponding pyramid-like structure has four first side-faces formed by said four first side-edges; each said first side-face is able to refract the light emitted by the first light-emitting element and thereby generate a first light-splitting point corresponding to the first light-emitting element; in addition, the second convex portion of the corresponding pyramid-like structure has four second side-faces formed by said four second side-edges; each said second side-face is able to refract the light emitted by the first light-emitting element and thereby generate a second light-splitting point corresponding to the first light-emitting element; and
thereby, the light emitted by the first light-emitting element can be refracted by the corresponding pyramid-like structure into eight light-splitting points.