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US 12,216,872 B2Granted
Capacitive touch keypad
AssigneeSchlage Lock Company LLC
InventorsJenna Lopez, Maxwell Watson, Sukanya Ranganathan, Frank A. Nardelli
Life of this patent
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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.
Claims20
An access control device, comprising:
- a capacitive touch keypad assembly comprising:
- a controller;
- a plurality of touch-sensitive key locations arranged in a plurality of columns and a plurality of rows;
- a plurality of first lines connecting the plurality of rows with the controller;
- and
- a plurality of second lines connecting the plurality of columns with the controller, wherein at least two touch-sensitive key locations in each of the plurality of columns are connected to the controller with a first branch of one the plurality of second lines that is connected between a junction and a first one of the at least two touch-sensitive key locations, a second branch of the one the plurality of second lines that is connected between the junction and a second one of the at least two touch-sensitive key locations, and a third branch connected between the junction and the controller;
- and
- wherein the first branch, the third branch, and a first one of the plurality of first lines connected to the first one of the at least two touch-sensitive key locations form a first loop that is in electrical parallel with a second loop formed by the second branch, the third branch, and a second one of the plurality of first lines connected to the second one of the at least two touch-sensitive key locations.
5 more elements
An access control device, comprising:
- a controller;
- a capacitive touch keypad matrix, comprising:
- a plurality of touch-sensitive key locations arranged in a plurality of columns and a plurality of rows;
- a plurality of first lines, each first line connecting the controller with a corresponding and respective column of the plurality of columns;
- and
- a plurality of second lines, each second line connecting the controller with a corresponding and respective row of the plurality of rows;
- and
- wherein each of the plurality of first lines includes a junction and comprises:
- a first branch positioned between the junction and a first row of the plurality of rows;
- a second branch positioned between the junction and a second row of the plurality of rows;
- and
- a third branch positioned between the junction and the controller;
- and
- wherein the first branch, the third branch, and a first one of the plurality of second lines connected to a first row of the plurality of rows form a first loop that is in electrical parallel with a second loop formed by the second branch, the third branch, and a second one of the plurality of second lines connected to a second row of the plurality of rows.
11 more elements
An access control device, comprising:
- a keypad assembly comprising a capacitive touch keypad matrix;
- and
- a controller connected with the capacitive touch keypad matrix;
- wherein the capacitive touch keypad matrix comprises a first key location, a second key location, a first line, a second line, and a third line;
- wherein the first line comprises 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;
- wherein the second line is connected between the first key location and the controller, and wherein the third line is connected between the second key location and the controller;
- and
- wherein the first branch, the third branch, and the second line form a first loop that is in electrical parallel with a second loop formed by the second branch, the third branch, and the third line.
5 more elements
Dependencies are inferred from the claim text.