Prism sheet and backlight module incorporating same

摘要

A prism sheet ( 10 ) includes a substrate ( 12 ) and a plurality of prism structures ( 14 ). The substrate includes a plurality of diffusing particles ( 122 ) dispersed therein. The prism structures are at a light output side of the substrate. The diffusing particles can diffuse light beams traveling through the substrate. This configuration performs the same function as that of a diffusing sheet of a conventional backlight module. The prism structures can gather light beams to improve a brightness of a backlight module ( 6 ) incorporating the prism sheet. Thus, the backlight module can provide bright and uniform light at a low cost and while having a reduced thickness.