Display device and method of driving the same for alternately applying a reset voltage to row and column sensor data lines
AssigneeSamsung Display Co., Ltd.
InventorsJoo-Hyung Lee, Kee-Han Uh, Man-Seung Cho
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Abstract
In a touch sensible display device, a first sensing unit is connected to a row sensor data line and outputs a first sensing signal according to a touch, and a second sensing unit is connected to a column sensor data line and outputs a second sensing signal according to the touch. A sensing signal processor alternately applies a reset voltage to the row sensor data line and the column sensor data line and generates a sensing data signal according to the first sensing signal and the second sensing signal, and a touch determiner processes a sensing data signal to generate touch information.
Claims6
A display device, comprising:
- a first sensor data line extending in a row direction and configured to transmit a first sensing signal, according to a touch to a first output unit, via a first sensing switching element;
- a second sensor data line extending in a column direction and configured to transmit a second sensing signal, according to a touch to a second output unit, via a second sensing switching element;
- a first reset switching element connected between the first sensor data line and a reset voltage;
- a second reset switching element connected between the second sensor data line and the reset voltage,
- wherein the first sensing switching element and the second reset switching element are simultaneously turned on during a first period, and
- wherein the second sensing switching element and the first reset switching element are simultaneously turned on during a second period,
- wherein the first output unit comprises:
- a first amplifier including a first inversion terminal and a first output terminal;
- a first capacitor connected between the first inversion terminal and the first output terminal of the first amplifier;
- and
- a third reset switching element connected in parallel to the first capacitor, and
- wherein the second output unit comprises:
- a second amplifier including a second inversion terminal and a second output terminal;
- a second capacitor connected between the second inversion terminal and the second output terminal of the second amplifier;
- and
- a fourth reset switching element connected in parallel to the second capacitor,
- wherein the first sensor switching element and the third reset switching element are simultaneously turned off during a third period between the first period and the second period, and the first output voltage is processed during the third period, and
- wherein the second sensor switching element and the fourth reset switching element are simultaneously turned off during a fourth period between the second period and the first period, and the second output voltage is processed during the fourth period.
Dependencies are inferred from the claim text.