Display device

Patent metadata

Field	Value
Publication number	US-10706753-B2
Application number	US-201715838631-A
Country	US
Kind code	B2
Filing date	Dec 12, 2017
Priority date	Jul 18, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A display device includes: a first substrate including a display area and a non-display area adjacent to the display area, wherein the display area includes a plurality of pixels; an output pad unit disposed in the non-display area and including an inspection pad and a driving voltage pad; a driving integrated circuit (IC) disposed in the non-display area and including an inspection bump; a driving voltage line electrically connected to the plurality of pixels and the driving voltage pad; and an inspection line having a first connection line and a second connection line, wherein the first connection line is electrically connected to the inspection pad and the inspection bump, and the second connection line is electrically connected to the inspection bump and partially overlaps the driving voltage line.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate comprising a display area and a non-display area adjacent to the display area, wherein the display area includes a plurality of pixels;
an output pad unit disposed in the non-display area and comprising an inspection pad and a driving voltage pad;
a driving integrated circuit (IC) disposed in the non-display area and comprising an inspection bump;
a driving voltage line electrically connected to the plurality of pixels and the driving voltage pad; and
an inspection line having a first connection line and a second connection line, wherein the first connection line is directly connected between the inspection pad and the inspection bump, and the second connection line is electrically connected only to the inspection bump and partially overlaps the driving voltage line,
wherein a capacitor is formed between the driving voltage line and the second connection line in an overlapping area in which the second connection line overlaps the driving voltage line.

2. The display device of claim 1 , wherein the driving IC further comprises an input bump unit electrically connected to the output pad unit, and an output bump unit electrically connected to the plurality of pixels, and
wherein the inspection bump is adjacent to the output bump unit.

3. The display device of claim 1 , further comprising: a second substrate facing the first substrate,
wherein the second substrate is a glass insulation substrate.

4. The display device of claim 1 , further comprising: an encapsulation layer covering the plurality of pixels,
wherein the encapsulation layer comprises an organic layer or an inorganic layer.

5. The display device of claim 1 , wherein the driving voltage line comprises a first driving voltage line for receiving a first driving voltage, and a second driving voltage line for receiving a second driving voltage, wherein a voltage level of the second driving voltage is lower than a voltage level of the first driving voltage.

6. The display device of claim 5 , wherein the second connection line overlaps the first driving voltage line or the second driving voltage line.

7. The display device of claim 5 , wherein at least one of the pixels comprises a first switching element and an organic light-emitting diode connected to the first switching element,
wherein the first switching element has a first electrode connected to the first driving voltage line and a second electrode connected to the organic light-emitting diode, and
wherein the organic light-emitting diode has a third electrode connected to the second electrode of the first switching element, and a fourth electrode connected to the second driving voltage line.

8. The display device of claim 1 , wherein at least one of the of pixels comprises a pixel electrode, a common electrode capacitively coupled to the pixel electrode, and a liquid-crystal layer interposed between the pixel electrode and the common electrode, and
wherein the common electrode is electrically connected to the driving voltage line.

9. The display device of claim 1 , wherein the driving voltage line is disposed on a layer different from a layer where the inspection line is disposed.

10. The display device of claim 1 , wherein the second connection line comprises a bent portion.

11. The display device of claim 1 , wherein the first substrate further comprises a bending area overlapping the non-display area, and
wherein the first substrate is bent in the bending area.

12. A display device, comprising:
a first substrate comprising a display area and a non-display area adjacent to the display area, wherein the display area includes a plurality of pixels;
an output pad unit disposed in the non-display area and comprising an inspection pad and a driving voltage pad;
a driving integrated circuit (IC) disposed in the non-display area and comprising an inspection bump;
a driving voltage line electrically connected to the plurality of pixels and the driving voltage pad; and
an inspection line having a first connection line and a second connection line, wherein the first connection line is electrically connected to the inspection pad and the inspection bump, and the second connection line is electrically connected to the inspection bump and partially overlaps the driving voltage line,
wherein the first substrate further comprises a bending area overlapping the non-display area, and
wherein the first substrate is bent in the bending area,
the display device further comprising: a connection electrode disposed in the bending area,
wherein the second connection line comprises a first sub-line and a second sub-line electrically connected to each other via the connection electrode.

13. A display device, comprising:
a first substrate comprising a display area and a non-display area adjacent to the display area, wherein the display area includes a display;
an output pad unit disposed in the non-display area and comprising an inspection pad;
a driving integrated circuit (IC) disposed in the non-display area between the output pad unit and the display and comprising an inspection bump; and
an inspection line disposed in the non-display area and electrically connected to the inspection bump,
wherein the inspection line comprises a first connection line and a second connection line, wherein the first connection line is directly connected to the inspection bump and the inspection pad, and the second connection line is electrically connected only to the inspection bump and extends away from the inspection bump to an area between the driving IC and the display.

14. The display device of claim 13 , further comprising: a driving voltage line disposed on the first substrate and electrically connected to a plurality of pixels included in the display,
wherein the output pad unit further comprises a driving voltage pad electrically connected to the driving voltage line.

15. The display device of claim 14 , wherein the second connection line partially overlaps the driving voltage line.

16. The display device of claim 14 , wherein the driving voltage line comprises a first driving voltage line for providing a first driving voltage, and a second driving voltage line for providing a second driving voltage, a voltage level of the first driving voltage is different from a voltage level of the second driving voltage, and
wherein the second connection line overlaps the first driving voltage line or the second driving voltage line.

17. The display device of claim 14 , wherein the inspection line is disposed on a layer different from a layer where the driving voltage line is disposed.

18. The display device of claim 13 , wherein the driving IC further comprises an output bump unit for providing a driving signal to the display, and an inspection bump electrically connected to the inspection line, and
wherein the inspection bump is adjacent to the output bump unit.

19. The display device of claim 13 , further comprising: an encapsulation element covering the display,
wherein the encapsulation element comprises an organic layer or an inorganic layer, or is a glass insulation substrate.

20. The display device of claim 13 , further comprising:
a second substrate facing the first substrate; and
a liquid-crystal layer interposed between the first substrate and the second substrate.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Won Se
• Shin Ae
• Kwak Won Kyu

Classifications

• H10P74/273

  Interconnections for measuring or testing, e.g. probe pads · CPC title

• H10W42/60

  protecting against electrostatic charges or discharges, e.g. Faraday shields (integrated devices comprising arrangements for electrical protection H10D89/60) · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8731

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

• G09G2330/06

  Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation · CPC title