The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2020
Filed:
Apr. 17, 2018
Applicant:
Lite-on Technology Corporation, Taipei, TW;
Inventors:
Er-Hao Chen, Taipei, TW;
Wen-Tong Liu, Taipei, TW;
Assignee:
Lite-On Technology Corporation, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 11/00 (2006.01); G06F 3/023 (2006.01);
U.S. Cl.
CPC ...
H03M 11/003 (2013.01); G06F 3/023 (2013.01);
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.