Display apparatus and method of driving the same

• US 8,823,673 B2
• Filed: 05/31/2013
• Issued: 09/02/2014
• 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: Jung, Suk Won, Yang, SungHoon, Kim, Woongkwon, Han, Sang Youn, Cho, Byeonghoon, Kim, Daecheol, Jeong, Ki-Hun, Jeon, Kyung-Sook, Bang, Jung suk
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): XAVIER, ANTONIO J
• Application Number:
  US13/907,041
• Publication Number:
  US 20130271424A1
• Time in Patent Office: 459 Days
• Field of Search: None
• US Class Current: 345/173
• 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 commonly connected to an output terminal, wherein each of the first sensor and the second sensor senses at least one of at least two external signals different from each other and outputs a sensing signal through the output terminal, 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 commonly connected to the output terminal after applying the scan signal, wherein a level of the second voltage is greater than a level of the first voltage;

outputting the sensing signal through a switching device and the output terminal 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.