Touch screen apparatus
First Claim
1. A touch screen apparatus, comprising:
- a touch line; and
a plurality of touch sensors coupled to the touch line,wherein each of the plurality of touch sensors comprises;
a first node;
a sensor capacitor operatively coupled to the first node for changing an electrical state of the first node depending on a respective touch action;
a reference capacitor operatively coupled to the first node;
a first switch having at least two respective terminals, the first switch being interposed between and coupled by way of two of the respective terminals thereof respectively to the first node and to the touch line such that when the first switch is activated, it provides a sensing signal from the first node to the touch line; and
a second switch having at least two respective terminals, the second switch being interposed between and coupled by way of two of the respective terminals thereof to the first node and to a reference voltage providing node such that when the second switch is activated, it supplies a reference voltage to the sensor capacitor and it simultaneously discharges or charges the reference capacitor.
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Accused Products
Abstract
There is provided a touch screen apparatus capable of detecting the presence a touch action and a position in a touch region depending on a change in electrical energy of one node of a touch sensor. A touch screen apparatus according to the present invention includes a plurality of pixels for displaying images and a plurality of touch sensors. Each of the plurality of touch sensors includes a first node being provided an electrical energy; a sensor capacitor for changing the electric potential energy of the first node depending on presence a touch action; a first switch for providing a sensing signal to the touch line controlled by the electrical energy of the first node; and a second switch for providing the electrical energy to the first node.
17 Citations
19 Claims
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1. A touch screen apparatus, comprising:
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a touch line; and a plurality of touch sensors coupled to the touch line, wherein each of the plurality of touch sensors comprises; a first node; a sensor capacitor operatively coupled to the first node for changing an electrical state of the first node depending on a respective touch action; a reference capacitor operatively coupled to the first node; a first switch having at least two respective terminals, the first switch being interposed between and coupled by way of two of the respective terminals thereof respectively to the first node and to the touch line such that when the first switch is activated, it provides a sensing signal from the first node to the touch line; and a second switch having at least two respective terminals, the second switch being interposed between and coupled by way of two of the respective terminals thereof to the first node and to a reference voltage providing node such that when the second switch is activated, it supplies a reference voltage to the sensor capacitor and it simultaneously discharges or charges the reference capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19)
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14. A touch screen apparatus, comprising:
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a touch line; first and second reference voltage providing lines respectively configured to supply respective first and second reference voltages; first and second gate lines coupled so as to be sequentially supplied with a gate turn-on voltage followed by a gate turn-off voltage; and a plurality of touch sensors, wherein each of the plurality of touch sensors comprises; a first node; a sensor capacitor connected to the first node and the first reference voltage providing line; a reference capacitor connected to the first node and the second reference voltage providing line; a first switch configured for connecting the first node and the touch line, the first switch being controlled by a signal provided to the first gate line; and a second switch configured for connecting the first node and the second reference voltage providing line, the second switch being controlled by a signal provided to the second gate line. - View Dependent Claims (15, 16, 17, 18)
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Specification