Patent ID: 9633803
Date: 2017-04-25
CPC Classifications: H01H

Claim:
1. A keyboard backlight module, comprising a backlight device, a light source and a plurality of high-refractive index scatter points, wherein: said backlight device comprises a reflective layer, a light guide layer and a light shielding layer arranged in a stack through lamination, said light guide layer being set between said reflective layer and said light shielding layer, said light shielding layer carrying a set of key switches on a top surface thereof; said light source comprises a circuit board carrying a circuit layout and bonded to a top surface of said reflective layer of said backlight device, and a plurality of light-emitting devices mounted in said circuit board and disposed between said reflective layer and said light shielding layer; said high-refractive index scatter points are mounted in at least one of opposing top and bottom surfaces of said light guide layer and prepared from a mixture containing a light-transmissive ink and high-refractive index particles at a predetermined ratio.