User interface device
AssigneeNokia Corporation
InventorAndrew Raymond Bick
Life of this patent
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Abstract
A keypad (7) of a mobile telephone handset comprises a keymat (17) beneath which are disposed capacitive sensing plates (20, 21). The keypad may be used in a conventional manner to enter alphanumeric data by pressing keys (18) or as a touch pad by sliding a finger over the surface of the keymat (17).
Claims35
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input for entering alphanumeric data and an integrally disposed impedance sensor so as to provide a second type of user input for operating the keypad as a touch sensitive pointing device.
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input and an integrally disposed impedance sensor so as to provide a second type of user input wherein said keys comprise a keymat and wherein the keymat and the impedance sensor are coextensive.
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input and integrally disposed impedance sensor so as to provide a second type of user input, wherein the impedance sensor comprises first and second sensing plates and the first sensing plate comprises a first set of electrodes, and wherein the electrodes are transparent.
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input and integrally disposed impedance sensor so as to provide a second type of user input, wherein the impedance sensor comprises first and second sensing plates, wherein the first sensing plate comprises a substrate, and wherein the substrate is substantially transparent.
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input and integrally disposed impedance sensor so as to provide a second type of user input, wherein the impedance sensor comprises first and second sensing plates, wherein the first sensing plate comprises a substrate, and wherein the substrate is made from polyethylene terephthalate.
A user interface device for electronic apparatus, the device comprising a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input and integrally disposed impedance sensor so as to provide a second type of user input, further comprising a light source to illuminate the keypad.
A method of fabricating a user interface device for electronic apparatus comprising providing a keypad having a plurality of keys each arranged to actuate a respective switch so as to provide a first type of user input for entering alphanumeric data and integrally disposing an impedance sensor so as to provide a second type of user input for operating the keypad as a touch sensitive pointing device.
Dependencies are inferred from the claim text.