Display device backlight module with lenses having supporting portions for diffuser board

A backlight module, comprising:

• a light source;
• a lens, disposed on a light emission surface of the light source;
• and
• a diffuser board, disposed on the lens;
• wherein the lens comprises a lens body and a supporting portion, the lens body is disposed on the light emission surface of the light source, the supporting portion is disposed between the lens body and the diffuser board;
• the lens body is configured to diffuse light of the light source, and the supporting portion is configured to support the diffuser board;
• wherein the lens body and the supporting portion are formed integrally together;
• and
• wherein the supporting portion is at least two;
• the at least two supporting portions are disposed evenly on a light output surface of the lens body;
• wherein the light output surface comprises a first light output surface and a second light output surface, the second light output surface surrounds a periphery of the first light output surface, the first light output surface is a concave surface;
• wherein the supporting portion is disposed on the second light output surface;
• and
• wherein an outer surface of the supporting portion is a coarse surface.