Back to results
US 7,888,610 B2Granted
Keypad and method for identifying keystrokes of a keypad
AssigneeInfineon Technologies AG
InventorTeck Chye Allen Lim
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention are related to a keypad and an electronic device having a keypad. In one embodiment a keypad comprises a plurality of keys. Each of the plurality of keys comprises one main electrode and at least one signal electrode is being adapted to connect electrically the main electrode and the at least one signal electrode when said key is pressed. The main electrode is connected to a reference potential connection of the keypad and surrounds the at least one signal electrode of said key.
Claims21
A keypad comprising:
- a plurality of column signal lines;
- a plurality of row signal lines;
- a reference potential connection;
- and
- a plurality of keys, each of the plurality of keys comprising at least one signal electrode, wherein a first of the at least one signal electrode is coupled to one of the plurality of column signal lines and a second of the at least one signal electrode is coupled to one of the plurality of row signal lines such that each of the plurality of keys is coupled to a unique combination of a column signal line and a row signal line, a main electrode coupled to the reference potential and at least partially laterally surrounding the at least one signal electrode, and a contact element adapted to selectively electrically couple the main electrode and the at least one signal electrode.
2 more elements
An electronic device comprising:
- a keypad, the keypad comprising a plurality of signal lines, a reference potential connection and a plurality of keys, each of the plurality of keys comprising:
- at least one signal electrode, wherein the at least one signal electrode is coupled to one of the plurality of signal lines, a main electrode coupled to the reference potential connection and at least partially laterally surrounding the at least one signal electrode, and a contact element adapted to selectively electrically couple the main electrode and the at least one signal electrode.
A keypad comprising:
- a reference potential connection;
- and
- a plurality of keys, each of the plurality of keys comprising:
- a column signal electrode, a row signal electrode, a main electrode coupled to the reference potential connection and configured to at least partially laterally surround the column signal electrode and the row signal electrode, and a contact element adapted to selectively electrically couple the main electrode, the row signal electrode and the column signal electrode.
1 more element
Dependencies are inferred from the claim text.