TOUCH-CONTROL SYSTEM, DUAL-INPUT TOUCH-CONTROL SYSTEM AND TOUCH-DETECTING METHOD
First Claim
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1. A touch-control system, applied to a touch screen having a plurality of voltage input ends and a signal detecting end, the touch-control system comprising:
- a control unit, connecting with the voltage input ends and the signal detecting end of the touch screen, generating an identification signal and supply an output voltage to the signal detecting end; and
an indicating device, connecting with the control unit, receiving the identification signal and transmitting the identification signal to the touch screen when the indicating device contacts the touch screen;
wherein the control unit detects the change of the output voltage through the voltage input end and the transmission of the identification signal to calculate a contact coordinate.
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Abstract
A touch-control system, dual-input touch-control system and a relevant touch-detecting method transmit a pre-generated identification signal through an indicating device to a touch screen and its control unit. Through the identification of the identification signal, those input signals not relevant to the identification signal will be filtered as noises, thereby prevents error touches of human finger or palm when using the indicating device.
18 Citations
24 Claims
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1. A touch-control system, applied to a touch screen having a plurality of voltage input ends and a signal detecting end, the touch-control system comprising:
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a control unit, connecting with the voltage input ends and the signal detecting end of the touch screen, generating an identification signal and supply an output voltage to the signal detecting end; and an indicating device, connecting with the control unit, receiving the identification signal and transmitting the identification signal to the touch screen when the indicating device contacts the touch screen; wherein the control unit detects the change of the output voltage through the voltage input end and the transmission of the identification signal to calculate a contact coordinate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A dual-input touch-control system, applied to a touch screen having a plurality of voltage input ends and a signal detecting end, the dual-input touch-control system comprises:
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a first control unit, connecting with the voltage input ends and the signal detecting end of the touch screen, supplying an output voltage to the voltage input ends, detecting the change of the output voltage through the signal detecting end and calculating an object contact coordinate; a second control unit, connecting with the first control unit and with the voltage input ends and the signal detecting end of the touch screen, generating an identification signal and supplying the output voltage to the signal detecting end; and an indicating device, connecting with the second control unit, receiving the identification signal and transmitting the identification signal to the touch screen when the indicating device contacts the touch screen; wherein the second control unit detects the change of the output voltage through the voltage input ends and the transmission of the identification signal to calculate an indicator contact coordinate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A dual-input touch-detecting method, comprising the steps of:
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performing a first touch-detecting mode to calculate a first coordinate where an object contacts a touch screen; generating an identification signal through an indicating device and input the identification signal to the touch screen when the indicating device contacts the touch screen; performing second touch-detecting mode to detect the identification signal and calculate a second coordinate where the indicating device contacts the touch screen; sequentially performing the first touch-detecting mode and the second touch-detecting mode; and when receiving the identification signal, reducing the duty cycle of the first touch-detecting mode, and increasing the duty cycle of the second touch-detecting mode. - View Dependent Claims (19, 20, 21, 22)
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23. A dual-input touch-detecting method, comprising the steps of:
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performing a first touch-detecting mode to calculate a first coordinate where an object contacts a touch screen; generating an identification signal through an indicating device and input the identification signal to the touch screen when the indicating device contacts the touch screen; performing a second touch-detecting mode to detect the identification signal and calculate a second coordinate where the indicating device contacts the touch screen; performing the first touch-detecting mode; when receiving a switch command, terminating the first touch-detecting mode and performing the second touch-detecting mode; and when performing the second touch-detecting mode, terminating the second touch-detecting mode and performing the first touch-detecting mode if the switch command is received. - View Dependent Claims (24)
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Specification