Patent · US Active

Keyboard apparatus

US10727866B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

LITE-ON TECHNOLOGY CORPORATION · TW

Inventors

Er-Hao Chen · New Taipei, TW
Wen-Tong Liu · Taipei, TW

Key dates

Filing date	Apr 17, 2018
Grant date	Jul 28, 2020
Priority date	—
Expiry date	Jun 15, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/023
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A keyboard apparatus including a key module and a detection circuit is provided. The key module includes a plurality of keys, a plurality of scan lines, and a plurality of return lines. The scan lines and the return lines are crossed to each other and coupled to the keys respectively. The detection circuit is coupled to the return lines and configured to detect a current flowing through each of the return lines and indicate that a switch of each of the keys is in an on state or in an off state according to a value of the current.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.