Display device

Patent metadata

Field	Value
Publication number	US-10276646-B2
Application number	US-201715612811-A
Country	US
Kind code	B2
Filing date	Jun 2, 2017
Priority date	Dec 8, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A display is provided. The display device includes a display area and a non-display area located around the display area; a base layer; an organic light-emitting diode (OLED) that is located on the base layer in the display area; and a first crack detection line that is located on the base layer in the non-display area; wherein the first crack detection line comprises a first line that extends substantially in a first direction along a first edge of the display area, a second line that is separated from the first line and extends substantially in the first direction, and a third line that is connected to an end of the first line and an end of the second line, wherein a cross-sectional shape of the first line in a second direction crossing the first direction is inversely tapered.

First claim

What is claimed is:

1. A display device comprising:
a display area and a non-display area located around the display area;
a base layer;
an organic light-emitting diode (OLED) that is located on the base layer in the display area; and
a first crack detection line that is located on the base layer in the non-display area;
wherein the first crack detection line comprises a first line that extends substantially in a first direction along a first edge of the display area, a second line that is separated from the first line and extends substantially in the first direction, and a third line that is connected to an end of the first line and an end of the second line, wherein a cross-sectional shape of the entire first line in a second direction crossing the first direction is inversely tapered.

2. The display device of claim 1 , wherein a shortest distance between the first crack detection line and an edge of the base layer is 50 μm to 100 μm.

3. The display device of claim 1 , wherein a cross-sectional shape of the second line in the second direction is inversely tapered.

4. The display device of claim 1 , further comprising:
a first test pad that is located in the non-display area and connected to the other end of the first line; and
a second test pad that is located in the non-display area and connected to the other end of the second line.

5. The display device of claim 4 , wherein a cross-sectional shape of the first test pad or a cross-sectional shape of the second test pad is inversely tapered.

6. The display device of claim 5 , further comprising a thin-film encapsulation layer that seals the OLED, wherein the first test pad and the second test pad do not contact the thin-film encapsulation layer.

7. The display device of claim 1 , further comprising a second crack detection line that is located on the base layer in the non-display area and separated from the first crack detection line, wherein the second crack detection line comprises a fourth line that extends substantially in the first direction along a second edge of the display area that faces the first edge, a fifth line that is separated from the fourth line and extends substantially in the first direction, and a sixth line that is connected to an end of the fourth line and an end of the fifth line, wherein a cross-sectional shape of the fourth line in the second direction crossing the first direction is inversely tapered.

8. The display device of claim 7 , wherein a cross-sectional shape of the fifth line in the second direction is inversely tapered.

9. The display device of claim 1 , further comprising:
a semiconductor layer that is located on the base layer in the display area;
a gate insulating layer that is located on the base layer and the semiconductor layer;
a gate electrode that is located on the gate insulating layer;
a first interlayer insulating film that is located on the gate electrode and the gate insulating layer; and
a source electrode and a drain electrode that are located on the first interlayer insulating film,
wherein the first crack detection line is located on the first interlayer insulating film and made of the same material as the source electrode and the drain electrode.

10. The display device of claim 1 , further comprising a power supply line that is located on the base layer in the non-display area and positioned between the display area and the first crack detection line.

11. The display device of claim 10 , further comprising:
a semiconductor layer that is located on the base layer in the display area;
a gate insulating layer that is located on the base layer and the semiconductor layer;
a gate electrode that is located on the gate insulating layer;
a first interlayer insulating film that is located on the gate electrode and the gate insulating layer; and
a source electrode and a drain electrode that are located on the first interlayer insulating film,
wherein the power supply line is located on the first interlayer insulating film and made of the same material as the source electrode and the drain electrode.

12. The display device of claim 11 , wherein the first crack detection line is made of the same material as the power supply line.

13. The display device of claim 11 , further comprising a second interlayer insulating film that is located on the source electrode and the drain electrode, wherein the OLED comprises a first electrode that is located on the second interlayer insulating film and connected to the drain electrode, a light emitting layer that is located on the first electrode, and a second electrode that is located on the light emitting layer, wherein the second electrode is electrically connected to the power supply line.

14. The display device of claim 13 , further comprising a connection electrode that contacts the power supply line and the second electrode and is made of the same material as the first electrode, wherein the second electrode is connected to the power supply line by the connection electrode.

15. The display device of claim 1 , further comprising a dam that is located on the base layer and positioned in the non-display area between the display area and the first crack detection line.

16. The display device of claim 15 , further comprising:
a thin-film transistor that is located on the base layer in the display area;
an interlayer insulating film that is located on the thin-film transistor; and
a pixel defining layer that is located on the interlayer insulating film and comprises an opening,
wherein the OLED comprises a first electrode that is located on the interlayer insulating film, electrically connected to the thin-film transistor and at least partially exposed through the opening, a light emitting layer that is located on the first electrode, and a second electrode that is located on the light emitting layer, wherein the dam comprises a first pattern which is made of the same material as the interlayer insulating film and a second pattern that is located on the first pattern and made of the same material as the pixel defining layer.

17. The display device of claim 16 , further comprising a thin-film encapsulation layer that seals the OLED and comprises an inorganic film and an organic film, wherein the organic film is located inside the dam.

18. The display device of claim 16 , further comprising a thin-film encapsulation layer that seals the OLED and comprises a first inorganic film, a second inorganic film, and an organic film located between the first inorganic film and the second inorganic film, wherein the first inorganic film and the second inorganic film contact each other on the outside of the dam.

19. The display device of claim 18 , further comprising an inorganic film pattern that is located on the first line, wherein the inorganic film pattern is separated from the first inorganic film and the second inorganic film.

20. The display device of claim 19 , wherein the inorganic film pattern comprises the same material as the first inorganic film or the second inorganic film.

21. The display device of claim 1 , further comprising:
a first inorganic film pattern disposed directly on the first line; and
a second inorganic film pattern disposed directly on the second line,
wherein the first inorganic film pattern and the second inorganic film pattern are spaced apart from each other in the second direction.

22. The display device of claim 1 , further comprising:
an inorganic film pattern disposed between the first li

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hun
• Kim Yong Jin
• Wang Soon Jung
• Lee Keun Soo
• Lee Jae Ho
• Chae Kyung Chan

Classifications

• H01L27/3276 Primary

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic