Touch sensor
First Claim
1. A touch sensor comprising:
- a keyboard having a key defining a touch sensing location;
control circuitry associated with the key, wherein the control circuitry includes a transistor, the key controls the transistor based on a touch event;
a pulse signal generator connected to the control circuitry and generating pulsed signals for transmission to the control circuitry, wherein the pulsed signals power the transistor, the transistor outputs a touch signal when a touch event occurs at the associated key and the transistor outputs a non-touch signal when no touch event occurs at the associated key; and
an analyzer connected to the control circuitry and receiving from the transistor one of the touch signal indicating the touch event and the non-touch signal indicating the no touch event.
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Accused Products
Abstract
A touch sensor includes a keyboard having a key defining a touch sensing location, and control circuitry associated with the key. The control circuitry includes a transistor, and the key controls the transistor based on a touch event. A pulse signal generator is connected to the control circuitry and generates pulsed signals for transmission to the control circuitry. The pulsed signals power the transistor, and the transistor outputs a touch signal when a touch event occurs at the associated key and the transistor outputs a non-touch signal when no touch event occurs at the associated key. An analyzer is connected to the control circuitry and receives from the transistor one of the touch signal indicating the touch event and the non-touch signal indicating the no touch event.
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Citations
20 Claims
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1. A touch sensor comprising:
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a keyboard having a key defining a touch sensing location; control circuitry associated with the key, wherein the control circuitry includes a transistor, the key controls the transistor based on a touch event; a pulse signal generator connected to the control circuitry and generating pulsed signals for transmission to the control circuitry, wherein the pulsed signals power the transistor, the transistor outputs a touch signal when a touch event occurs at the associated key and the transistor outputs a non-touch signal when no touch event occurs at the associated key; and an analyzer connected to the control circuitry and receiving from the transistor one of the touch signal indicating the touch event and the non-touch signal indicating the no touch event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch sensor comprising:
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a keyboard having multiple keys arranged in a matrix having rows of keys and columns of keys, each key defining a touch sensing location; control circuitry associated with each of the keys, wherein the control circuitry includes a transistor for each key and each key controls the transistor based on a touch event; a pulse signal generator connected to the control circuitry and generating pulsed signals for transmission to the control circuitry associated with each of the keys, wherein the pulsed signals power the transistors, each transistor powered by the pulsed signals outputs a touch signal when a touch event occurs at the associated key and a non-touch signal when no touch event occurs at the associated key; and an analyzer connected to the control circuitry and receiving from the transistors one of the touch signal indicating the touch event and the non-touch signal indicating the no touch event. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of detecting a touch event using a touch sensor having a key and associated control circuitry including a transistor, said method comprising
sending pulsed signals from a controller to the control circuitry associated with the key; -
powering the transistor with the pulsed signal; once powered, generating a touch signal when a touch event occurs at the key and generating a non-touch signal when no touch event occurs at the key; and analyzing the generated signal from the transistor. - View Dependent Claims (18, 19, 20)
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Specification