| 摘要 |
A backlit touch button assembly includes a circuit board, one or more light sources, a reflecting plate, and a marked strip. The light sources are positioned on the circuit board. The reflecting plate and the marked strip are attached to opposite sides of the circuit board. The reflecting plate defines one or more optical grooves receiving the light sources. Each optical groove has a reflecting portion. The circuit board defines one or more through holes adjacent to the light sources and corresponding to the reflecting portion of the optical grooves. The reflecting portion has a first reflecting surface, a second reflecting surface, and a third reflecting surface. The first reflecting surface and the third reflecting surface meet the second reflecting surface, respectively, at an angle.
|
