Patent attributes
A keyboard with backlighting functionality includes: a membrane circuit substrate having an upper circuit sheet, an insulator sheet, and a lower circuit sheet laminated together in sequence; a press key set having a plurality of press keys that are disposed on the membrane circuit substrate, and that are capable of being pressed so as to cause the membrane circuit substrate to transmit input signals; and at least one light-emitting element mounted onto a lower surface of the upper circuit sheet that faces the insulator sheet. The membrane circuit substrate is configured as a backlighting sheet that allows light from the light-emitting element to propagate therein, and is formed with a plurality of reflecting dots for directing the light that propagates in the membrane circuit substrate toward the press keys of the press key set.
