Patent ID: 11862410
Assignee: ACER INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A keyboard, comprising:
a base, having a thin film circuit;
a light sensing module, disposed at the base;
a carrier, located above the base;
a magnetic member, disposed on the carrier;
a cap; and
a control unit, electrically connected to the thin film circuit and the light sensing module,
wherein the carrier and the cap move up and down relative to the base,
wherein after the light sensing module projects light to the cap, the cap projects reflected light to the light sensing module,
wherein the cap is adapted to be assembled to the carrier via a magnetic attracting force of the magnetic member or adapted to be detached from the carrier via overcoming the magnetic attracting force of the magnetic member, so that the key structure is suitable for allowing replacement of different caps, and the control unit determines the cap according to the reflected light generated by the cap and received by the light sensing module.