Patent ID: 11886676
Assignee: SCHLAGE LOCK COMPANY LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An access control device, comprising:
a controller; and
a capacitive touch keypad matrix, comprising:
a plurality of touch-sensitive key locations comprising a first key location and a second key location, wherein the first key location is located in a first column and a first row, and wherein the second key location is located in the first column and a second row;
at least one first line connecting the first column with the controller;
a second line connecting the first key location with the controller; and
a third line connecting the second key location with the controller;

wherein the at least one first line comprises:
a first line first branch connected between a junction and the first key location;
a first line second branch connected between the junction and the second key location; and
a first line third branch connected between the junction and the controller; and

wherein the first line first branch, the first line third branch, and the second line electrically connect the first key location to the controller in a first signal transmission loop, and wherein the first line second branch, the first line third branch, and the third line electrically connect the second key location to the controller in a second signal transmission loop, so that the first key location and the second key location are connected with and transmit signals to and receive signals from the controller in electrical parallel with one another.