A keypad system uses capacitive touch switches in combination with one or more mechanical switches for ultra-low-power operation and/or increased functionality. A Capacitive switches are activated by touching different regions of a housing. A microcontroller detects the activation of the touch switches and communicate a code to a remote device in response to switch activation. The microcontroller preferably has a fully operational active state and a reduced functionality sleep state. Activation of at least one mechanical switch causes the microcontroller to awaken from the reduced functionality sleep state to the fully operational active state, thereby enabling the microcontroller to determine if one or more of the capacitive switches has been activated to communicate a corresponding code to the remote device. While ideally suited to vehicle-mounted keyless entry systems, the apparatus and methods find wider applicability in diverse fields of use.


    Access

    Download


    Export, share and cite



    Title :

    HYBRID CAPACITIVE KEYPAD


    Contributors:

    Publication date :

    2019-01-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H03K PULSE TECHNIQUE , Impulstechnik / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung






    KEYPAD MASTER CODE

    WILT MATTHEW / DAWSON BRANDON M | European Patent Office | 2018

    Free access

    Keypad master code

    MATTHEW WILT / BRANDON M DAWSON | European Patent Office | 2018

    Free access