System for disposing a proximity sensitive touchpad behind a mobile phone keypad
First Claim
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1. A portable electronic appliance comprising:
- a keypad having a plurality of keys, wherein each of the plurality of keys is arranged so as to actuate a respective mechanical switch so as to provide a first type of user input; and
an impedance sensing means disposed integrally with the keypad so as to provide a second type of user input.
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Abstract
A proximity-based mutually capacitance-sensitive touchpad that is disposed directly beneath a keypad keymat of a mobile telephone, wherein posts associated with each key pass through a mutually capacitance-sensitive sensor electrode grid of the touchpad such that the keypad posts do not interfere with touchpad detection and tracking of a pointing object that moves along the keypad surface, to thereby enable touchpad data entry, cursor control, and scroll bar control on a display of the mobile telephone, wherein the keypad posts actuate mechanical switches underneath the touchpad.
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Citations
63 Claims
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1. A portable electronic appliance comprising:
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a keypad having a plurality of keys, wherein each of the plurality of keys is arranged so as to actuate a respective mechanical switch so as to provide a first type of user input; and
an impedance sensing means disposed integrally with the keypad so as to provide a second type of user input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for providing a portable electronic appliance that combines touchpad functionality with discrete keys, said method comprising:
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(1) providing a keypad having a plurality of keys, wherein each of the plurality of keys is arranged so as to actuate a respective mechanical switch so as to provide a first type of user input; and
(2) providing an impedance sensing means disposed integrally with the keypad so as to provide a second type of user input. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification