TOUCH SCREEN DRIVER AND METHOD FOR DRIVING THE SAME
First Claim
1. A touch screen driver comprising:
- a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines;
a Tx driving circuit configured to sequentially supply a pair of out-of-phase driving signals composed of a first driving signal and a second driving signal which has a phase difference of 180°
with respect to the first driving signal to the Tx lines, wherein the first driving signal and the second driving signal are simultaneously supplied to the adjacent two Tx lines, respectively; and
an Rx driving circuit configured to sample a charge of the touch sensor received through the Rx lines coupled with the Tx lines and convert the sampled charge into digital data,wherein the Rx driving circuit outputs initial digital data obtained as an initial scanning result of the touch screen and outputs digital data obtained as a scanning result of the touch screen as normal data when a touch input of the touch screen is generated.
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Abstract
A touch screen driver and method for driving the same are disclosed. The touch screen driver includes a Tx driving circuit which sequentially supplies a pair of out-of-phase composed of a first driving signal and a second driving signal which has a phase difference of 180° with respect to the first driving signal and the second driving signal driving signals to Tx lines, wherein the first signal and the second signal are simultaneously supplied to the adjacent Tx lines, respectively; and an Rx driving circuit which samples a charge of the touch sensor received through the Rx lines coupled with the Tx lines and converts the sampled charge into digital data.
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Citations
13 Claims
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1. A touch screen driver comprising:
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a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines; a Tx driving circuit configured to sequentially supply a pair of out-of-phase driving signals composed of a first driving signal and a second driving signal which has a phase difference of 180°
with respect to the first driving signal to the Tx lines, wherein the first driving signal and the second driving signal are simultaneously supplied to the adjacent two Tx lines, respectively; andan Rx driving circuit configured to sample a charge of the touch sensor received through the Rx lines coupled with the Tx lines and convert the sampled charge into digital data, wherein the Rx driving circuit outputs initial digital data obtained as an initial scanning result of the touch screen and outputs digital data obtained as a scanning result of the touch screen as normal data when a touch input of the touch screen is generated. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for driving a touch screen driver including a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines, the method comprising:
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sequentially supplying a pair of out-of-phase driving signals composed of a first driving signal and a second driving signal which has a phase difference of 180°
with respect to the first driving signal and the second driving signal are simultaneously supplying out-of-phase driving signals to the two adjacent Tx lines, respectively; andsampling a charge of the touch sensor received through the Rx lines coupled with the Tx lines and converting the sampled charge into digital data, wherein the converting of the sampled charge into the digital data includes; generating initial digital data obtained as an initial scanning result of the touch screen; and generating digital data obtained as a scanning result of the touch screen as normal data when a touch input of the touch screen is generated. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification