DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME

• US 20130271424A1
• Filed: 05/31/2013
• Published: 10/17/2013
• Est. Priority Date: 08/05/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: YANG, SungHoon, HAN, Sang Youn, JEONG, Ki-Hun, JEON, Kyung-Sook, BANG, Jung suk, JUNG, SUK WON, KIM, WOONGKWON, CHO, BYEONGHOON, KIM, DAECHEOL
• Granted Patent: US 8,823,673 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means

Abstract

A display apparatus includes a display panel, sensor circuits, and a detection circuit. Each sensor circuit senses at least two external signals different from each other and outputs a sensing signal. The detection circuit receives the sensing signal to detect a position to which the external signals are applied. Each sensor circuit includes sensors commonly connected to an output terminal, a scan line which receives a scan signal, a capacitor disposed between the scan line and the output terminal, charged with a first voltage in response to the scan signal, and charged with a second voltage greater than the first voltage in response to the current signal after the scan line is floated, a switching device which outputs the sensing signal in response to the second voltage, and a readout line which applies the sensing signal output from the switching device to the detection circuit.

Claims

1. A method of driving a display apparatus comprising a first sensor and a second sensor, wherein each of the first sensor and the second sensor senses at least one of at least two external signals different from each other, the method comprising:

applying a scan signal to charge a capacitor with a first voltage;

charging the capacitor with a second voltage in response to a current signal corresponding to the at least two external signals sensed by at least one of the first sensor and the second sensor after applying the scan signal, wherein a level of the second voltage is greater than a level of the first voltage;

outputting a sensing signal through a switching device in response to the second voltage;

generating position information based on the sensing signal, wherein the position information is corresponding to a position at which the at least two external signals are sensed; and

processing an event corresponding to the position information and displaying a processed result on a display panel.

2. The method of claim 1, wherein

a level of the first voltage is less than a level of a threshold voltage of the switching device, and

a level of the second voltage is substantially equal to or greater than a level of the threshold voltage of the switching device.

3. The method of claim 1, further comprising lowering a voltage charged to the capacitor from the second voltage to the first voltage.