CAPACITANCE SENSING TOUCHPAD CIRCUIT CAPABLE OF DUAL USE AS A TOUCHPAD CONTROLLER AND KEYBOARD CONTROLLER
First Claim
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1. A single system for controlling operation of a touchpad and a keyboard, said system comprised of:
- a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes operating as touchpad sensors and disposed within a touchpad;
the touchpad sensor control circuit that is also coupled to a second set of X and Y electrodes operating as keyboard key sensors and disposed within a keyboard; and
wherein the touchpad sensor control circuit controls operation of the touchpad in a first mode, and wherein the touchpad sensor control circuit controls operation of the keyboard in a second mode.
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Abstract
Touchpad sensor control circuitry that controls the operation of a touch or proximity sensitive touchpad in a first mode, and in a second mode functions as a keyboard controller, wherein the touchpad sensor control circuitry also determines which keys on a keyboard have been actuated by manipulation of keys, wherein pressing a key is detected by the touchpad sensor control circuitry.
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Citations
16 Claims
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1. A single system for controlling operation of a touchpad and a keyboard, said system comprised of:
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a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes operating as touchpad sensors and disposed within a touchpad;
the touchpad sensor control circuit that is also coupled to a second set of X and Y electrodes operating as keyboard key sensors and disposed within a keyboard; and
wherein the touchpad sensor control circuit controls operation of the touchpad in a first mode, and wherein the touchpad sensor control circuit controls operation of the keyboard in a second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A single system for controlling operation of a touchpad and a keyboard, said system comprised of:
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a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes disposed within a touchpad;
a single sense line disposed within the touchpad;
the touchpad sensor control circuit that is coupled to a second set of X electrodes disposed within a keyboard;
the single sense line also disposed within the keyboard;
wherein the touchpad sensor control circuit controls operation of the touchpad in a first mode, and wherein the touchpad sensor control circuit controls operation of the keyboard in a second mode. - View Dependent Claims (9)
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10. A method for controlling operation of a touchpad and a keyboard using a single touchpad controller, said method comprising the steps of:
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(1) providing a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes operating as touchpad sensors and disposed within a touchpad, coupling a second set of X and Y electrodes to the touchpad sensor control circuit and operating as keyboard key sensors disposed within a keyboard;
(2) controlling operation of the touchpad in a first mode; and
(3) controlling operation of the keyboard in a second mode. - View Dependent Claims (11, 12, 13, 14)
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15. A method for controlling operation of a touchpad and a keyboard, said method comprising the steps of:
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(1) providing a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes and to a second set of X electrodes disposed within a keyboard, and a single sense line disposed so as to be able to detect signals from the first and the second set of X and Y electrodes;
(2) operating the touchpad in a first mode; and
(3) operating the keyboard in a second. - View Dependent Claims (16)
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Specification