Keyboard with backlit circuit board

Abstract

A circuit board includes a substrate having a plurality of through-openings, a plurality of coupling members disposed on the substrate and configured to connect to a keycap, a switch circuit disposed on the substrate and having switch pads for triggering a keyswitch signal in response to the keycap moving toward the substrate, a lighting circuit disposed on the substrate at a side opposite to the coupling members, and an illuminant electrically connected to the lighting circuit. The switch pads and illuminant arranged such that their vertical projections fall within an area surrounded by the plurality of coupling members. A keyboard includes the switch circuit, the lighting circuit, a light guide sheet, and at least one keycap, such that light from the illuminant enters the light guide and propagates transversely to illuminate the at least one keycap.

Dependencies are inferred from the claim text.