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:
Sep. 07, 2021
Filed:
Feb. 10, 2020
Applicant:
Chicony Electronics Co., Ltd., New Taipei, TW;
Inventor:
Chien-Tsung Chen, New Taipei, TW;
Assignee:
Chicony Electronics Co., Ltd., New Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/02 (2006.01); H03M 11/20 (2006.01);
U.S. Cl.
CPC ...
G06F 3/0202 (2013.01); H03M 11/20 (2013.01);
Abstract
A keyboard scanning circuit and control method thereof are provided. The method is adapted to detect states of a plurality of switching circuits arranged in an array manner, wherein each of the switching circuits includes a key switch and a first resistor connected in series; the switch circuits are coupled to a plurality of scan lines and a plurality of feedback lines; each of the scan lines is coupled to the switch circuits of the same column in a first direction, and each of the feedback lines is coupled to the switch circuits of the same row in the second direction.