Organic light emitting diode display device

Patent metadata

Field	Value
Publication number	US-11355568-B2
Application number	US-201916542850-A
Country	US
Kind code	B2
Filing date	Aug 16, 2019
Priority date	Aug 20, 2018
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

An organic light emitting diode (“OLED”) display device includes a substrate having a display region including a light emitting region and a peripheral region, and a pad region located in one side of the display region, a plurality of light emitting structures on the substrate in the light emitting region, and a plurality of fan-out wirings including a low fan-out wiring in the peripheral region on the substrate, a middle fan-out wiring on the low fan-out wiring, the middle fan-out wiring overlapping at least a portion of the low fan-out wiring, and an upper fan-out wiring on the middle fan-out wiring, the upper fan-out wiring overlapping at least a portion of the low fan-out wiring.

First claim

What is claimed is:

1. An organic light emitting diode (“OLED”) display device, comprising:
a substrate having a display region including a light emitting region and a peripheral region, and a pad region located in one side of the display region;
a plurality of light emitting structures on the substrate in the light emitting region; and
a plurality of fan-out wirings extending from the pad region including:
a plurality of low fan-out wirings in the peripheral region on the substrate;
a plurality of middle fan-out wirings on the low fan-out wiring, each middle fan-out wiring overlapping at least a portion of at least one low fan-out wiring; and
a plurality of upper fan-out wirings on the middle fan-out wiring, each upper fan-out wiring overlapping at least a portion of at least one low fan-out wiring, wherein the upper fan-out wirings do not overlap the middle fan-out wirings.

2. The OLED display device as claimed in claim 1 , wherein the fan-out wirings are in a portion of the peripheral region between the light emitting region and the pad region.

3. The OLED display device as claimed in claim 1 , wherein each of the fan-out wirings includes a straight line portion and an oblique line portion.

4. The OLED display device as claimed in claim 3 , wherein the straight line portion of each of the fan-out wirings extends in a first direction from the pad region into the display region, and the oblique line portion of each of the fan-out wirings extends in a direction that is different from the first direction.

5. The OLED display device as claimed in claim 3 , wherein the straight line portion and the oblique line portion are integrally formed.

6. The OLED display device as claimed in claim 3 , wherein the oblique line portion has a first distal end connected to the straight line portion and a second distal end aligned in one side of the light emitting region.

7. The OLED display device as claimed in claim 1 , wherein the low, middle, and upper fan-out wirings are located at different layers from each other.

8. The OLED display device as claimed in claim 1 , wherein
a first side portion of the at least one low fan-out wiring overlaps at least one middle fan-out wiring,
a second side portion of at least one low fan-out wiring overlaps at least one upper fan-out wiring, and
the first side portion is opposite to the second side portion.

9. The OLED display device as claimed in claim 1 , further comprising:
a power supply wiring on the fan-out wirings.

10. The OLED display device as claimed in claim 1 , wherein:
the fan-out wirings include first through (N)th fan-out wirings, where N is a multiple of 4,
a (4K+1)th fan-out wiring among the first through (N)th fan-out wirings corresponds to the middle fan-out wiring,
(4K+2)th and (4K+4)th fan-out wirings among the first through (N)th fan-out wirings correspond to the low fan-out wirings, and
a (4K+3)th fan-out wiring among the first through (N)th fan-out wirings corresponds to the upper fan-out wiring, where K is an integer between 0 and (N/4)−1, and wherein
the (4K+1)th fan-out wiring overlaps a first side portion of the (4K+2)th fan-out wiring, and the (4K+3)th fan-out wiring overlaps a second side portion of the (4K+2)th fan-out wiring and a first side portion of the (4K+4)th fan-out wiring.

11. The OLED display device as claimed in claim 1 , wherein the pad region includes:
a bending region adjacent to the display region; and
a pad electrode region spaced apart from the display region.

12. The OLED display device as claimed in claim 11 , further comprising:
a plurality of pad electrodes in the pad electrode region, the pad electrodes being electrically connected to an external device; and
connection electrodes in the bending region, the connection electrodes electrically connecting the fan-out wirings and the pad electrodes.

13. The OLED display device as claimed in claim 1 , further comprising:
a buffer layer on the substrate, the buffer layer covering the low fan-out wirings in the peripheral region; and
a plurality of semiconductor elements between the buffer layer and the light emitting structures.

14. The OLED display device as claimed in claim 13 , wherein each of the semiconductor elements includes:
an active layer on the buffer layer;
a gate insulation layer covering the active layer on the buffer layer;
a first gate electrode on the gate insulation layer;
a first insulating interlayer covering the first gate electrode and the middle fan-out wiring on the gate insulation layer;
a second gate electrode on the first insulating interlayer;
a second insulating interlayer covering the second gate electrode and the upper fan-out wiring on the first insulating interlayer; and
source and drain electrodes on the second insulating interlayer.

15. The OLED display device as claimed in claim 1 , further comprising:
a thin film encapsulation structure on the light emitting structures, wherein
each of the light emitting structures includes:
a lower electrode;
a light emitting layer on the lower electrode; and
an upper electrode on the light emitting layer, and wherein
the thin film encapsulation structure includes:
a first thin film encapsulation layer on the upper electrode, the first thin film encapsulation layer including inorganic materials having flexibility;
a second thin film encapsulation layer on the first thin film encapsulation layer, the second thin film encapsulation layer including organic materials having flexibility; and
a third thin film encapsulation layer on the second thin film encapsulation layer, the third thin film encapsulation layer including the inorganic materials having the flexibility.

16. The OLED display device as claimed in claim 1 , wherein at least one middle fan-out wiring overlaps two immediately adjacent low fan-out wirings.

17. The OLED display device as claimed in claim 1 , wherein immediately adjacent low fan-out wirings are spaced apart at a different distance than immediately adjacent middle fan-out wirings.

18. The OLED display device as claimed in claim 17 , wherein immediately adjacent low fan-out wirings are spaced apart at a different distance than immediately adjacent upper fan-out wirings.

19. The OLED display device as claimed in claim 1 , wherein a first distance along a line perpendicular to a main plan of the substrate between the low fan-out wirings and the middle fan-out wirings is greater than a second distance along a line perpendicular to the main plan of the substrate between the middle fan-out wirings and the upper fan-out wirings.

20. An organic light emitting diode (“OLED”) display device, comprising:
a substrate having a display region including a light emitting region and a peripheral region, and a pad region located in one side of the display region;
a plurality of light emitting structures on the substrate in the light emitting region;
a plurality of fan-out wirings including:
a low fan-out wiring in the peripheral region on the substrate;
a middle fan-out wiring on the low fan-out wiring, the middle fan-out wiring overlapping at least a portion of the low fan-out wiring; and
an upper fan-out wiring on the middle fan-out wiring, the upper fan-out wiring overlapping at least a portion of the low fan-out wiring, wherein

the substrate includes:
a first organic film layer;
a first barrier layer on the first organic film layer;
a second organic film layer on the first barrier layer; and
a second barrier layer on the second organic film layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Ka Ji-Hyun
• Kim Taegeun
• Eom Ki Myeong
• Lee Kwangsae

Classifications

• H10D64/011

  of electrodes ohmically coupled to a semiconductor · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10D86/443 Primary

  adapted for preventing breakage, peeling or short circuiting · CPC title