Patent ID: 9734966
Date: 2017-08-15
CPC Classifications: H01H

Claim:
1. A light-emitting keyboard, comprising: a substrate; a membrane circuit board disposed on a top surface of said substrate, said membrane circuit board comprising a lower layer, an upper layer and a light-guiding spacer layer arranged between said lower layer and said upper layer, said lower layer comprising a first circuit located on a top surface thereof, said upper layer comprising a second circuit located on a bottom surface thereof, said light-guiding spacer layer keeping said lower layer and said upper layer positioned apart from each other by a thickness thereof, wherein said light-guiding spacer layer is formed with a through hole cut through opposing top and bottom surfaces thereof for allowing a corresponding portion of said upper layer to be elastically deformed by an external force to force said second circuit into contact with said first circuit; a key assembly disposed on a top surface of said membrane circuit board and pressable to force the corresponding portion of said upper layer to enter said through hole to cause electric connection between said second circuit and said first circuit; and a light source adapted to emit light into said light-guiding spacer layer, wherein said membrane circuit board further comprises a bump located at a bottom surface of said lower layer and supported on said substrate, and said bump is arranged correspondingly to said through hole of said light-guiding spacer layer to lift a portion of said lower layer into said through hole of said light-guiding spacer layer.