Light-emitting display and method of driving the same

Patent metadata

Field	Value
Publication number	US-11030951-B2
Application number	US-201916707990-A
Country	US
Kind code	B2
Filing date	Dec 9, 2019
Priority date	Dec 19, 2018
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A light-emitting display includes a display panel, a first circuit, and a second circuit. The display panel comprises a pixel. The first circuit supplies a data voltage to a data line for the pixel. The second circuit performs a sensing operation for sensing a sensing line for the pixel and outputs a voltage required for the sensing operation, and outputs a noise removing voltage for cancelling out noise formed on the sensing line during the sensing operation.

First claim

What is claimed is:

1. A light-emitting display comprising:
a display panel comprising a pixel;
a first circuit which supplies a data voltage to a data line for the pixel; and
a second circuit which performs a sensing operation for sensing a sensing line for the pixel and outputs a voltage required for the sensing operation,
wherein the second circuit outputs a noise removing voltage for cancelling out noise formed on the sensing line during the sensing operation,
wherein the second circuit comprises:
a sensing switch part connected to the sensing line;
a noise remove voltage source for outputting the noise removing voltage through the sensing switch part; and
an integrating circuit part which senses the sensing line through the sensing switch part between the sensing line and the integrating circuit part.

2. The light-emitting display of claim 1 , wherein a level of the noise removing voltage varies in response to the noise.

3. The light-emitting display of claim 1 , wherein an apply time of the noise removing voltage varies in response to the noise.

4. The light-emitting display of claim 1 , wherein the noise removing voltage is applied for a shorter time than an initial time of the integrating circuit part included in the second circuit.

5. The light-emitting display of claim 1 , wherein the second circuit further comprises:
a circuit initial switch part which resets the integrating circuit part; and
a noise removing switch part connected to the sensing line.

6. The light-emitting display of claim 5 , wherein the noise removing switch part and the circuit initial switch part are simultaneously turned on.

7. The light-emitting display of claim 6 , wherein a turn-on time of the noise removing switch part is shorter than a turn-on time of the circuit initial switch part.

8. The light-emitting display of claim 5 , wherein the noise removing voltage has a different voltage level from a reference voltage for the integrating circuit part.

9. The light-emitting display of claim 5 , wherein a level and an apply time of the noise removing voltage are varied by a timing controller for controlling the first circuit and the second circuit.

10. A method of driving a light-emitting display comprising a display panel that displays an image during an active period and performs sensing during a blanking interval, the method comprising:
turning on a sensing switch part connected to a sensing line on the display panel during the blanking interval;
sensing the sensing line through the sensing switch part between the sensing line and an integrating circuit part;
outputting a noise removing voltage through the sensing switch part; and
sensing the sensing line.

11. The method of claim 10 , wherein a level of the noise removing voltage varies in response to the noise.

12. The method of claim 10 , wherein an apply time of the noise removing voltage varies in response to the noise.

13. The method of claim 10 , wherein a level and an apply time of the noise removing voltage are varied in response to the noise.

14. The method of claim 10 , wherein the noise removing voltage is applied for a shorter time than an initial time of the integrating circuit part.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Changwoo
• YOO Jaeik
• Do Osung

Classifications

• G09G2320/0209

  Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G2310/061

  for resetting or blanking · CPC title

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title