TOUCH CONTROLLER HAVING INCREASED SENSING SENSITIVITY, AND DISPLAY DRIVING CIRCUIT AND DISPLAY DEVICE AND SYSTEM HAVING THE TOUCH CONTROLLER
First Claim
1. A touch data generator configured for use within a touch screen controller (TSC) in a touch display device comprising a touch screen panel, and a display driving circuit (DDI), wherein the touch data generator comprises:
- an amplifier comprising a positive input terminal receiving an alternating reference voltage, a negative input terminal receiving a sensor input, an output terminal providing an output voltage, and a resistance-capacitance (RC) feedback circuit biasing the amplifier,wherein the sensor input comprises a sensor capacitance including a touch capacitance and a capacitive background noise component, andthe amplifier is configured to remove the capacitive background noise component from the sensor input while amplifying the reference voltage in response to the touch capacitance.
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Accused Products
Abstract
A touch controller includes a touch data generator that is connected to a plurality of sensing lines, the touch data generator sensing a change in capacitance of a sensing unit connected to each of the sensing lines and generating touch data by processing the sensing signal corresponding to the result of sensing; and a signal processor that controls a timing of generating the touch data by receiving at least one piece of timing information for driving a display panel from a timing controller, and then providing either the timing information or a signal generated from the timing information as a control signal to the touch data generator.
286 Citations
32 Claims
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1. A touch data generator configured for use within a touch screen controller (TSC) in a touch display device comprising a touch screen panel, and a display driving circuit (DDI), wherein the touch data generator comprises:
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an amplifier comprising a positive input terminal receiving an alternating reference voltage, a negative input terminal receiving a sensor input, an output terminal providing an output voltage, and a resistance-capacitance (RC) feedback circuit biasing the amplifier, wherein the sensor input comprises a sensor capacitance including a touch capacitance and a capacitive background noise component, and the amplifier is configured to remove the capacitive background noise component from the sensor input while amplifying the reference voltage in response to the touch capacitance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16)
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14. A touch data generator configured for use within a touch screen controller (TSC) in a touch display device comprising a touch screen panel, and a display driving circuit (DDI), wherein the touch data generator comprises:
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driving and sensing control circuit detecting a sensor input and passing the detected sense input to an amplifier, wherein the sensor input comprises a touch capacitance and a capacitive background noise component; the amplifier comprises a positive input terminal receiving an alternating reference voltage, a negative input terminal receiving the sensor input, an output terminal providing an output voltage, and a resistance-capacitance (RC) feedback circuit biasing the amplifier, the amplifier is configured to remove the capacitive background noise component from the sensor input while amplifying the reference voltage in response to the touch capacitance, and the DDI comprises a timing controller configured to provide at least one control/timing signal to the TSC, such that the reference voltage is synchronously related to the at least one control/timing signal. - View Dependent Claims (15)
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17. A method operating a touch screen controller (TSC) in a touch display device comprising a touch screen panel and a display driving circuit (DDI), the method comprising:
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coupling a positive input terminal of an amplifier to an alternating reference voltage; coupling a negative input terminal of the amplifier to a driving and sensing control circuit to receive a sensor input, wherein the sensor input comprises a touch capacitance and a capacitive background noise component; and biasing the amplifier with a resistance-capacitance (RC) feedback circuit to amplify the reference voltage in response to the touch capacitance while removing the capacitive background noise component. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A touch display device, comprising:
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a display; a display driving circuit (DDI) configured to control operation of the display; a touch screen; a touch screen controller (TSC) configured to control operation of the touch screen, wherein the TSC comprises a touch data generator configured to generate sense data corresponding to sensor input related to user-defined touch data received via the touch screen, the touch data generator comprising; an amplifier comprising a positive input terminal receiving an alternating reference voltage, a negative input terminal receiving the sensor input, an output terminal providing an output voltage, and a resistance-capacitance (RC) feedback circuit biasing the amplifier, wherein the sensor input comprises sensor capacitance including a touch capacitance and a capacitive background noise component, and the amplifier is configured to remove the capacitive background noise component from the sensor input while amplifying the reference voltage in response to the touch capacitance. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32-65. -65. (canceled)
Specification