Device for controlling touch panel
First Claim
1. A device for controlling a touch panel comprising:
- a differential amplification unit for supplying current to a touch panel;
a signal amplification unit for amplifying the output voltage of the differential amplification unit;
an analog-digital conversion unit for converting the analog output signal of the signal amplification unit into a digital signal;
a control unit for measuring the signal output from the analog-digital conversion unit and detecting the position of an object when the object touches the touch panel; and
a sine wave generating unit for providing a sine wave signal to the differential amplification unit in response to an output signal of the control unit, supplying a maximum current to the differential amplification unit while the touch panel is in a standby state, and controlling the level of the sine wave signal in response to conductivity of the object when the object touches the touch panel.
1 Assignment
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Accused Products
Abstract
Disclosed herein is a device including a differential amplification unit for supplying current to the touch panel; a signal amplification unit for amplifying the output voltage of the differential amplification unit; an analog-digital conversion unit for converting the analog output signal of the signal amplification unit into a digital signal; a control unit for measuring the signal output from the analog-digital conversion unit and detecting the position of an object when the object touches the touch panel; and a sine wave generating unit for providing a sine wave signal to the differential amplification unit in response to the output signal of the control unit, supplying a maximum current to the differential amplification unit while the touch panel is in a standby state, and controlling the level of the sine wave signal in response to conductivity of the object when the object touches the touch panel.
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Citations
5 Claims
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1. A device for controlling a touch panel comprising:
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a differential amplification unit for supplying current to a touch panel; a signal amplification unit for amplifying the output voltage of the differential amplification unit; an analog-digital conversion unit for converting the analog output signal of the signal amplification unit into a digital signal; a control unit for measuring the signal output from the analog-digital conversion unit and detecting the position of an object when the object touches the touch panel; and a sine wave generating unit for providing a sine wave signal to the differential amplification unit in response to an output signal of the control unit, supplying a maximum current to the differential amplification unit while the touch panel is in a standby state, and controlling the level of the sine wave signal in response to conductivity of the object when the object touches the touch panel. - View Dependent Claims (2, 3, 4, 5)
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Specification