TOUCH CONTROLLER, TOUCH SENSING DEVICE, AND TOUCH SENSING METHOD
First Claim
Patent Images
1. A touch controller comprising:
- a driving signal transmitter configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency, wherein the first frequency is higher than a preset carrier frequency, and the second frequency is less than the carrier frequency, and to input the driving signal to a touch panel; and
a sensing signal receiver configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.
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Abstract
A touch controller includes a driving signal transmitter and a sensing signal receiver. The driving signal transmitter is configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency. The first frequency is higher than a preset carrier frequency and the second frequency is less than the carrier frequency. The driving signal transmitter inputs the driving signal to a touch panel. The sensing signal receiver is configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.
20 Citations
27 Claims
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1. A touch controller comprising:
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a driving signal transmitter configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency, wherein the first frequency is higher than a preset carrier frequency, and the second frequency is less than the carrier frequency, and to input the driving signal to a touch panel; and a sensing signal receiver configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15)
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8-10. -10. (canceled)
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16-19. -19. (canceled)
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20. A touch sensing method comprising:
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generating a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency, wherein the first frequency is higher than a preset carrier frequency, and the second frequency is less than the carrier frequency; sensing a touch on a touch panel based on the driving signal to generate a sensing signal; and generating touch data based on the sensing signal received from the touch panel. - View Dependent Claims (21, 22, 23, 24)
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25. A touch controller for a touch panel, the touch controller comprising:
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a receiver configured to receive a sensing signal from the touch panel and derive touch data from the sensing signal; a noise analysis circuit configured to determine an amount of noise in the touch data; a frequency adjustment circuit configured to change a dodging frequency when the amount is less than a reference amount and otherwise maintains the dodging frequency; and a transmitter configured to perform a frequency spreading on an input signal using the dodging frequency to generate a driving signal for application to the touch panel. - View Dependent Claims (26, 27)
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Specification