Organic light-emitting display device

Patent metadata

Field	Value
Publication number	US-10991301-B2
Application number	US-201816215107-A
Country	US
Kind code	B2
Filing date	Dec 10, 2018
Priority date	Dec 11, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

An organic light-emitting display device includes a substrate including an active area in which a plurality of pixels are defined, and a non-active area surrounding the active area and having a pad area in which a plurality of pads are disposed on one side of the active area; a plurality of power supply lines disposed in the active area; a plurality of test transistors disposed in the non-active area on another side of the active area; and a plurality of power supply transistors connected to the plurality of power supply lines. Each of the power supply transistors is disposed next to the respective test transistors. A uniform supply voltage can thus be applied across a plurality of pixels without any additional process such that uniformity of luminance can be improved.

First claim

What is claimed is:

1. An organic light-emitting display device comprising:
a substrate comprising an active area in which a plurality of pixels are defined, and a non-active area surrounding the active area and having a pad area in which a plurality of pads are disposed on one side of the active area;
a plurality of power supply lines disposed in the active area:
a plurality of test transistors disposed in the non-active area on another side of the active area; and
a plurality of power supply transistors connected to the plurality of power supply lines, and disposed next to the respective test transistors,
wherein the plurality of test transistors and the plurality of power supply transistors are arranged alternately one by one along a single row direction,
wherein the organic light-emitting display device further comprises:
a plurality of test data link lines connected to the plurality of test transistors, respectively;
a test enable signal line connected to the plurality of test transistors;
a supply voltage enable signal line connected to the plurality of power supply transistors; and
a plurality of data lines disposed in the active area,

wherein a gate electrode of each of the plurality of test transistors is connected to the test enable signal line, one of a source electrode and a drain electrode thereof is connected to the plurality of test data link lines, and the other one of the source electrode and the drain electrode thereof is connected to the plurality of data lines, and
wherein a gate electrode of each of the plurality of power supply transistors is connected to the supply voltage enable signal line, one of a source electrode and a drain electrode thereof is connected to the plurality of test data link lines, and the other one of the source electrode and the drain electrode thereof is connected to the plurality of power supply lines.

2. The organic light-emitting display device of claim 1 , wherein the plurality of pads comprise:
a plurality of test data pads connected to the plurality of test data link lines;
at least one test enable pad connected to the test enable signal line; and
at least one supply voltage enable pad connected to the supply voltage enable signal line.

3. The organic light-emitting display device of claim 1 , further comprising:
a plurality of data link lines disposed between the active area and the pad area and connected to the plurality of data lines,
wherein the plurality of pads further comprise a plurality of data pads connected to the plurality of data link lines.

4. The organic light-emitting display device of claim 1 , further comprising:
a driver bonded to the plurality of pads,
wherein the driver is configured to apply a high-level voltage to the plurality of test data link lines and to apply a signal to turn on the plurality of power supply transistors through the supply voltage enable signal line.

5. The organic light-emitting display device of claim 4 , wherein the driver is electrically insulated from the test enable signal line or applies a signal to turn off the plurality of test transistors through the test enable signal line.

6. The organic light-emitting display device of claim 1 , wherein the plurality of test data link lines, the test enable signal line and the supply voltage enable signal line are arranged so as to surround the active area.

7. An organic light-emitting display device comprising:
a substrate comprising an active area having a plurality of pixels, and a non-active area adjacent to the active area and having a pad area next to one side of the active area;
a plurality of power supply lines in the active area;
a plurality of test transistors in the non-active area next to two sides of the active area; and
a plurality of power supply transistors each of the plurality of power supply transistors being disposed between two adjacent test transistors among the plurality of test transistors in the non-active area on another side of the active area,
wherein the plurality of power supply transistors apply a high-level voltage to the plurality of power supply lines to reduce a voltage drop in the plurality of power supply lines, and
wherein the plurality of test transistors and the plurality of power supply transistors are arranged alternately one by one along a single row direction,
wherein the organic light-emitting display device further comprises:
a plurality of test data link lines connected to the plurality of test transistors, respectively;
a test enable signal line connected to the plurality of test transistors;
a supply voltage enable signal line connected to the plurality of power supply transistors;
a first supply voltage line connected to the plurality of power supply transistors; and
a plurality of data lines disposed in the active area,

wherein a gate electrode of each of the plurality of test transistors is connected to the test enable signal line, one of a source electrode and a drain electrode thereof is connected to the plurality of test data link lines, and the other one of the source electrode and the drain electrode thereof is connected to the plurality of data lines, and
wherein a gate electrode of each of the plurality of power supply transistors is connected to the supply voltage enable signal line, one of a source electrode and a drain electrode thereof is connected to the first supply voltage line, and the other one of the source electrode and the drain electrode thereof is connected to the plurality of power supply lines.

8. The organic light-emitting display device of claim 7 , further comprising:
a plurality of pads disposed on the pad area,
wherein the plurality of pads further comprise at least one first supply voltage pad connected to the first supply voltage line.

9. The organic light-emitting display device of claim 8 , further comprising:
a second supply voltage line disposed between the pad area and the active area and connected to the plurality of power supply lines,
wherein the plurality of pads comprise at least one second supply voltage pad connected to the second supply voltage line, and the second supply voltage pad receives a voltage of a same level as the first supply voltage pad.

10. The organic light-emitting display device of claim 7 , wherein a width (W 2 ) of an area occupied by each of the plurality of test transistors is less than a spacing (W 1 ) between two adjacent power supply lines among the plurality of power supply lines.

11. The organic light-emitting display device of claim 7 , wherein a number of the plurality of test transistors is equal to or greater than a number of the plurality of power supply transistors.

12. The organic light-emitting display device of claim 11 , wherein two pixels next to each other among the plurality of pixels share one of the plurality of power supply lines.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jonghyuck
• Lee Sangbin
• Kang Jinhoo

Classifications

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• 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

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G2330/12

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