METHOD FOR DETECTING TOUCH INPUT AND TOUCH INPUT DEVICE THEREFOR
First Claim
1. A method for detecting a touch input at a touch input device, the method comprising:
- after a wake-up of the touch input device, scanning at least one function touch button of the touch input device and at least one comparison touch button of the touch input device;
detecting a change in capacitance generated by the at least one function touch button and a change in capacitance generated by the at least one comparison touch button as a result of the scanning of the at least one function touch button and the at least one comparison touch button;
determining whether an expected touch input corresponds to an intention of a user or to a first environmental change causing the change in capacitance generated by the at least one function touch button;
comparing the change in capacitance generated by the at least one function touch button with the change in capacitance generated by the at least one comparison touch button; and
determining whether the expected touch input is a determined touch input corresponding to the intention of the user or a touch input corresponding to a second environmental change based on the comparison of the change in capacitance generated by the at least one function touch button with the change in capacitance generated by the at least one comparison touch button.
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Accused Products
Abstract
A method for detecting a touch input can include: scanning at least one function touch button of the touch input device and at least one comparison touch button of the touch input device; determining whether an expected touch input corresponds to an intention of a user or to a first environmental change causing the change in capacitance generated by the at least one function touch button; comparing the change in capacitance generated by the at least one function touch button with the change in capacitance generated by the at least one comparison touch button; and determining whether the expected touch input is a determined touch input corresponding to the intention of the user or a touch input corresponding to a second environmental change based on the comparison.
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Citations
19 Claims
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1. A method for detecting a touch input at a touch input device, the method comprising:
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after a wake-up of the touch input device, scanning at least one function touch button of the touch input device and at least one comparison touch button of the touch input device; detecting a change in capacitance generated by the at least one function touch button and a change in capacitance generated by the at least one comparison touch button as a result of the scanning of the at least one function touch button and the at least one comparison touch button; determining whether an expected touch input corresponds to an intention of a user or to a first environmental change causing the change in capacitance generated by the at least one function touch button; comparing the change in capacitance generated by the at least one function touch button with the change in capacitance generated by the at least one comparison touch button; and determining whether the expected touch input is a determined touch input corresponding to the intention of the user or a touch input corresponding to a second environmental change based on the comparison of the change in capacitance generated by the at least one function touch button with the change in capacitance generated by the at least one comparison touch button. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A touch input device, comprising:
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at least one function touch button disposed above a printed circuit board (PCB); at least one touch electrode disposed between the PCB and the at least one function touch button, the at least one touch electrode corresponding to the at least one function touch button; a tact switch disposed between the at least one touch electrode, the tact switch configured to detect a change in capacitance by bottom compression of at least one air gap disposed between the at least one touch electrode and the at least one function touch button and to generate a wake-up signal; at least one comparison touch button spaced apart from the at least one function touch button; and a microcontroller unit (MCU) disposed in the PCB, the MCU configured to compare a capacitance generated by the at least one function touch button with a capacitance generated by the at least one comparison touch button and to determine whether a touch input corresponds to an intention of a user or to an environmental change based on the comparison of the capacitance generated by the at least one function touch button with the capacitance generated by the at least one comparison touch button. - View Dependent Claims (11, 12, 13)
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14. A touch input device for detecting a touch input, the touch input device comprising:
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a wake-up detector configured to detect a wake-up signal generated by an operation of a tact switch; a first comparison and determination device configured to determine that a touch input corresponds to an intention of a user when each capacitance value generated by at least one function touch button is greater than a mean capacitance value of each capacitance value generated by the at least one function touch button according to the detected wake-up signal; and a second comparison and determination device configured to determine that the touch input corresponds to the intention of the user when a capacitance value generated by a comparison touch button is greater than each mean deviation of capacitances generated by the at least one function touch button in which the touch input determined as corresponding to the intention of the user occurs. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification