Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-2018226467-A1
Application number	US-201815890674-A
Country	US
Kind code	A1
Filing date	Feb 7, 2018
Priority date	Feb 7, 2017
Publication date	Aug 9, 2018
Grant date	—

Abstract

An organic light emitting display device includes a display unit including a first pixel column and a first data line connected to the first pixel column, a first pad unit including first and second signal pads, a test unit including a first switching element which is connected between the first data line and the first signal pad, and includes a control electrode connected to the second signal pad, a first conductive pattern provided in a different layer from that of the first signal pad and connected to the first signal pad, and a second conductive pattern provided in a different layer from that of the second signal pad and connected to the second signal pad, where the first and second conductive patterns are spaced apart from each other in the same layer, and a width of the first conductive pattern is greater than that of the second conductive pattern.

First claim

What is claimed is:

1 . An organic light emitting display device comprising:
a display unit including a first pixel column and a first data line connected to the first pixel column; a first pad unit including a first signal pad and a second signal pad; a test unit including a first switching element which is connected between the first data line and the first signal pad, and includes a control electrode connected to the second signal pad; a first conductive pattern provided in a different layer from that of the first signal pad to be connected to one end of the first signal pad; and a second conductive pattern provided in a different layer from that of the second signal pad to be connected to one end of the second signal pad, wherein the first conductive pattern and the second conductive pattern are spaced apart from each other in the same layer, and a width of the first conductive pattern is greater than that of the second conductive pattern.

2 . The organic light emitting display device of claim 1 , further comprising a dummy pad adjacent to the first signal pad in the same layer as that of the first signal pad,
wherein at least one region of the dummy pad overlaps with the first conductive pattern.

3 . The organic light emitting display device of claim 2 , further comprising at least one insulating layer interposed between the dummy pad and the first conductive pattern,
wherein the dummy pad is insulated from the first conductive pattern.

4 . The organic light emitting display device of claim 1 , wherein the first pixel column includes a plurality of pixels each including at least one transistor,
wherein the at least one transistor each includes: an active pattern provided on a substrate; source and drain electrodes connected to the active pattern; and a gate electrode overlapping with the active pattern with a first insulating layer interposed therebetween, the gate electrode being provided in the same layer as that of the first and second conductive patterns.

5 . The organic light emitting display device of claim 4 , further comprising a source-drain pattern connected to at least one of the source and drain electrodes, the source-drain pattern being provided in the same layer as that of the first and second signal pads.

6 . The organic light emitting display device of claim 1 , wherein the first and second signal pads include the same material with each other, and the first and second conductive patterns include the same material with each other.

7 . The organic light emitting display device of claim 1 , wherein the first and second conductive patterns include a different material from that of the first and second signal pads, and include a material having a higher corrosion resistance than that of the first and second signal pads.

8 . The organic light emitting display device of claim 1 , wherein the first pixel column includes:
a plurality of first color pixels that emit light of a first color; and a plurality of second color pixels that emit light of a second color, wherein the plurality of first color pixels and the plurality of second color pixels are alternately arranged.

9 . The organic light emitting display device of claim 8 , wherein the display unit further includes:
a second pixel column adjacent to the first pixel column, and including a plurality of third color pixels that emit light of a third color; and a second data line connected to the second pixel column.

10 . The organic light emitting display device of claim 9 , wherein the first pad unit further includes third, fourth, fifth, and sixth signal pads provided in the same layer as that of the first and second signal pads,
wherein the test unit further includes: a second switching element connected between the first data line and the third signal pad, the second switching element including a control electrode connected to the fourth signal pad; and a third switching element connected between the second data line and the fifth signal pad, the third switching element including a control electrode connected to the sixth signal pad.

11 . The organic light emitting display device of claim 10 , further comprising third, fourth, fifth, and sixth conductive patterns respectively connected to one ends of the third, fourth, fifth, and sixth signal pads, the third, fourth, fifth, and sixth conductive patterns being provided in the same layer as that of the first and second conductive patterns,
wherein a width of each of the first and third conductive patterns is greater than that of each of the second, fourth, fifth, and sixth conductive patterns.

12 . The organic light emitting display device of claim 1 , further comprising a second pad unit including a plurality of electrically isolated pads that are provided in a vicinity of the first pad unit.

13 . An organic light emitting display device comprising:
a display unit including a first pixel column and a first data line connected to the first pixel column; a first pad unit including a first signal pad and a second signal pad; a test unit including a first switching element which is connected between the first data line and the first signal pad, and includes a control electrode connected to the second signal pad; a first conductive pattern provided in a different layer from that of the first signal pad to be connected to one end of the first signal pad; and a second conductive pattern provided in a different layer from that of the second signal pad to be connected to one end of the second signal pad, wherein the first conductive pattern and the second conductive pattern have different structures from each other.

14 . The organic light emitting display device of claim 13 , wherein the first conductive pattern has a multi-layer structure including:
a first sub-conductive pattern provided in the same layer as that of the second conductive pattern; and a second sub-conductive pattern provided in a different layer from that of the first sub-conductive pattern to be connected to the first sub-conductive pattern.

15 . The organic light emitting display device of claim 14 , wherein the first pixel column includes a plurality of pixels each including at least one transistor and a capacitor,
wherein the capacitor includes: a first electrode provided in the same layer as that of the first sub-conductive pattern; and a second electrode provided in the same layer as that of the second sub-conductive pattern.

16 . The organic light emitting display device of claim 15 , wherein the at least one transistor each includes:
an active pattern provided on a substrate; source and drain electrodes connected to the active pattern; and a gate electrode overlapping with the active pattern with a first insulating layer interposed therebetween, the gate electrode being provided in the same layer as that of the first sub-conductive pattern.

17 . The organic light emitting display device of claim 16 , further comprising a source-drain pattern connected to at least one of the source and drain electrodes, the source-drain pattern being provided in the same layer as that of the first and second signal pads.

18 . The organic light emitting display device of claim 14 , wherein the second conductive pattern has a single-layer structure including one conductive layer provided in the same layer as that of the first sub-conductive pattern.

19 . The organic light emitting display device of claim 13 , wherein the first and second conductive patterns include a different material

Assignees

• Samsung Display Co Ltd

Inventors

• Ka Ji Hyun
• Kwon Tae Hoon
• Kim Yang Wan
• Lee Min Ku
• Lee Jae Yong
• Jeong Jin Tae
• Cha Seung Ji

Classifications

• H10P74/277 Primary

  Circuits for electrically characterising or monitoring manufacturing processes, e.g. circuits in tested chips or circuits in testing wafers · CPC title

• G09G2310/0264

  Details of driving circuits · CPC title

• H01L51/5203

  Electricity · mapped topic

• H01L27/3276 Primary

  Electricity · mapped topic

• G09G3/006

  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