Organic light-emitting display panel and test method

Patent metadata

Field	Value
Publication number	US-2016104402-A1
Application number	US-201514698292-A
Country	US
Kind code	A1
Filing date	Apr 28, 2015
Priority date	Oct 13, 2014
Publication date	Apr 14, 2016
Grant date	—

Abstract

An organic light-emitting display panel includes a pixel unit including a plurality of pixels configured to display different colors, wherein the plurality of pixels is respectively disposed at intersections of a plurality of scan lines and a plurality of data lines; and a test unit configured to selectively apply, to a plurality of link lines connected to the data lines, a pixel test signal for detecting defects of the plurality of pixels and a link line test signal for detecting short and open states of the plurality of link lines.

First claim

What is claimed is:

1 . An organic light-emitting display panel, comprising:
a pixel unit comprising a plurality of pixels configured to display different colors, wherein the plurality of pixels is respectively disposed at intersections of a plurality of scan lines and a plurality of data lines; and a test unit configured to selectively apply, to a plurality of link lines connected to the data lines, a pixel test signal for detecting defects of the plurality of pixels and a link line test signal for detecting short and open states of the plurality of link lines.

2 . The organic light-emitting display panel of claim 1 , wherein the plurality of link lines comprise odd number link lines and even number link lines,
wherein the odd number link lines are disposed on a first layer and the even number link lines are disposed on a second layer, and at least one insulating layer is disposed between the first layer and the second layer.

3 . The organic light-emitting display panel of claim 1 , wherein the plurality of pixels comprises:
first pixels and second pixels alternately arranged in a first column and alternately arranged in a third column; and third pixels arranged in a second column between the first and third columns, and arranged in a fourth column adjacent to the third column, wherein an order in which the first and second pixels are arranged in the third column is opposite to an order in which the first and second pixels are arranged in the first column.

4 . The organic light-emitting display panel of claim 3 , wherein the test unit comprises a plurality of test switches, wherein each of the plurality of test switches comprises:
a gate connected to one of a plurality of control signal lines each configured to supply a test control signal, a first terminal connected to one of the plurality of data lines via one of the plurality of link lines, and a second terminal connected to one of a plurality of test signal lines configured to supply one of pixel test signals and link line test signals.

5 . The organic light-emitting display panel of claim 4 , wherein the plurality of test switches comprises:
a first test switch comprising a gate connected to a first control signal line, a first terminal connected to a data line of the first column, and a second terminal connected to a first test signal line; a second test switch comprising a gate connected to a second control signal line, a first terminal connected to the data line of the first column, and a second terminal connected to a second test signal line; a third test switch comprising a gate connected to a third control signal line, a first terminal connected to a data line of the second column, and a second terminal connected to a third test signal line; a fourth test switch comprising a gate connected to the first control signal line, a first terminal connected to a data line of the third column, and a second terminal connected to the second test signal line; a fifth test switch comprising a gate connected to the second control signal line, a first terminal connected to the data line of the third column, and a second terminal connected to the first test signal line; a sixth test switch comprising a gate connected to the third control signal line, and a first terminal connected to a data line of the fourth column; a seventh test switch comprising a gate connected to a fourth control signal line, a first terminal connected to a second terminal of the sixth test switch, and a second terminal connected to the third test signal line; and an eighth test switch comprising a gate connected to a fifth control signal line, a first terminal connected to the second terminal of the sixth test switch, and a second terminal connected to the second test signal line.

6 . The organic light-emitting display panel of claim 5 , wherein the test unit is configured to alternately apply the gate-on level signal to the first and second control signal lines in response to a gate-on level signal applied to the third and fourth control signal lines and a gate-off level signal applied to the fifth control signal line.

7 . The organic light-emitting display panel of claim 6 , wherein a first pixel test signal is applied to the first test signal line,
a second pixel test signal is applied to the second test signal line, and a third pixel test signal is applied to the third test signal line.

8 . The organic light-emitting display panel of claim 5 , wherein the test unit is configured to alternately apply the gate-on level signal to the first and second control signal lines in response to a gate-on level signal applied to the third and fifth control signal lines and a gate-off level signal applied to the fourth control signal line.

9 . The organic light-emitting display panel of claim 8 , wherein a first link line test signal is applied to the first test signal line,
a second link line test signal is applied to the second test signal line, and a third link line test signal is applied to the third test signal line.

10 . The organic light-emitting display panel of claim 9 , wherein a first grayscale signal is applied to the first and third test signal lines as each of the first and third link line test signals, and a second grayscale signal is applied to the second test signal line as the second link line test signal in response to the gate-on signal applied to the first control signal line, and
wherein the second grayscale signal is applied to the first and third test signal lines as each of the first and third link line test signals and the first grayscale signal is applied to the second test signal line as the second link line test signal in response to the gate-on level signal applied to the second control signal line.

11 . The organic light-emitting display panel of claim 8 , wherein the pixel test signal and the link line test signal are direct current (DC) signals.

12 . The organic light-emitting display panel of claim 1 , further comprising a plurality of pads that respectively connect the plurality of data lines to the plurality of link lines.

13 . A method of testing an organic light-emitting display panel, comprising:
applying a pixel test signal, for detecting a lighting defect of a plurality of pixels, to a plurality of link lines respectively connected to a plurality of data lines; and applying a link line test signal, for detecting short and open states of the plurality of link lines, to the plurality of link lines.

14 . The method of claim 13 , wherein the plurality of link lines comprises odd number link lines and even number link lines,
wherein the odd number link lines are disposed on a first layer and the even number link lines are disposed on a second layer, and at least one insulating layer disposed between the first layer and the second layer.

15 . The method of claim 13 , wherein the plurality of pixels comprise:
first pixels and second pixels alternately arranged in a first column and alternately arranged in a third column; and third pixels arranged in a second column between the first and third columns and arranged in a fourth column adjacent to the third column, wherein an order in which the first pixels and the second pixels are arranged in the third column is opposite to an order in which the first pixels and the second pixels are arranged in the first column.

16 . The method of claim 15 , wherein the organic light-emitting display panel comprises:
a first test switch comprising a gate connected to a first control signal line, a first terminal connected to a data line of the first

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jihye

Classifications

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G01R31/2635

  Testing light-emitting diodes, laser diodes or photodiodes · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G09G3/3225

  using an active matrix · CPC title