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US 11,886,676 B2Granted
Capacitive touch keypad
AssigneeSchlage Lock Company LLC
InventorsJenna Lopez, Maxwell Watson, Sukanya Ranganathan, Frank A. Nardelli
Life of this patent
Estimating the term…
Abstract
An exemplary an access control device generally includes a keypad assembly, an antenna, and a controller. The keypad assembly includes a capacitive touch keypad matrix, and the antenna is substantially coplanar with the capacitive touch keypad matrix. The controller is connected with each of the keypad assembly and the antenna such that the controller is operable to receive access codes via each of the keypad assembly and the antenna.
Claims12
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.
12 more elements
An access control device, comprising:
- a keypad assembly comprising a printed circuit board, a capacitive touch keypad matrix on the printed circuit board, and an antenna on the printed circuit board substantially coplanar with and circumferentially surrounding the capacitive touch keypad matrix;
- and
- a controller connected with each of the keypad assembly and the antenna such that the controller is operable to receive access codes via each of the keypad assembly and the antenna, wherein the keypad assembly further comprises:
- a plurality of touch sensitive key locations, comprising a first key location and a second key location;
- a first line comprising:
- a first branch connected between a junction and the first key location;
- a second branch connected between the junction and the second key location;
- and
- a third branch connected between the junction and the controller;
- a second line connected between the first key location and the controller;
- and
- a third line connected between the second key location and the controller;
- and
- wherein the first branch, the third branch, and the second line electrically connect the first key location to the controller in a first signal transmission loop, and wherein the second branch, the 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.
11 more elements
Dependencies are inferred from the claim text.