Capacitive touch sensor and method
AssigneeTexas Instruments Incorporated
InventorsZhang Jun, Shen Ge, Xu Kang Cheng, Zhou Yi, Hao Meng, Ji Ru Jun
Life of this patent
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Abstract
A capacitive touch sensor is disclosed for use with input signal. The capacitive touch sensor includes a number n of input/output lines. Each of the number n of input/output lines is electrically disconnected from every other of the number n of input/output lines. Each of the number n of input/output lines is arranged to cross every other of the number n of input/output lines. Each of a number β of positions includes one of the number n of input/output lines crossing another of the number n of input/output lines.
Claims20
A method for operating a capacitive touch sensor device, the method comprising:
- transmitting a first signal on a first input/output line of n input/output lines of the capacitive touch sensor device, wherein each of the n input/output lines is arranged so that it is electrically disconnected from each other one of the n input/output lines while crossing each other one of the n input/output lines, and wherein n is greater than or equal to 3;
- receiving a second signal on an input/output line of the n input/output lines other than the first input/output line;
- and
- determining that a touch event has occurred in the capacitive touch sensor device based on the second signal.
An apparatus, the apparatus comprising:
- a capacitive touch sensor device including n input/output lines;
- and
- a controller coupled to the n input/output lines, the controller configured to:
- transmit a first signal on a first input/output line of the n input/output lines of the capacitive touch sensor device, wherein each of the n input/output lines is arranged so that it is electrically disconnected from each other one of the n input/output lines while crossing each other one of the n input/output lines, and wherein n is greater than or equal to 3;
- receive a second signal on an input/output line of the n input/output lines other than the first input/output line;
- and
- determine that a touch event has occurred in the capacitive touch sensor device based on the second signal.
Dependencies are inferred from the claim text.