Display apparatus and mask for manufacturing the same

Patent metadata

Field	Value
Publication number	US-12075640-B2
Application number	US-201916520255-A
Country	US
Kind code	B2
Filing date	Jul 23, 2019
Priority date	Oct 23, 2018
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

A display apparatus includes: a substrate including a display area and a peripheral area; a thin-film encapsulation layer overlapping the display area and including an inorganic film and an organic film; a conductive layer located in the peripheral area; and a dam overlapping an outer edge of the conductive layer, wherein the dam includes a first inclined portion extending from a top surface of the dam toward the display area and at least partially overlapping the conductive layer and a second inclined portion extending in an opposite direction to the first inclined portion. A shape of the first inclined portion and a shape of the second inclined portion are asymmetric to each other.

First claim

What is claimed is:

1. A display apparatus comprising:
a substrate comprising a display area displaying an image and a peripheral area located around the display area;
a display device located in the display area;
a thin-film encapsulation layer covering the display device and comprising at least one inorganic film and at least one organic film;
a conductive layer located in the peripheral area and surrounding at least a portion of the display area; and
a dam at least partially overlapping an outer edge of the conductive layer,
wherein the dam comprises a center portion, a first inclined portion connected to the center portion and extending from about a top surface of the center portion toward the substrate in a thickness direction of the display apparatus and extending toward the display area in a plan view and at least partially overlapping the conductive layer and a second inclined portion connected to the center portion and extending from about the top surface of the center portion in an opposite direction to the first inclined portion in the plan view,
wherein a shape of the first inclined portion and a shape of the second inclined portion are different from each other,
wherein the first inclined portion meets a surface of the conductive layer at a first angle with respect to the thickness direction and the second inclined portion meets a surface of a layer beneath the second inclined portion at a second angle with respect to the thickness direction;
wherein the first angle and the second angle are with respect to a top surface of the substrate,
wherein the first angle is different than the second angle,
wherein the second inclined portion comprises a recess portion and an adhesion-enhancing portion,
wherein the recess portion is disposed between the center portion and the adhesion-enhancing portion, and the adhesion-enhancing portion is located outside the recess portion from the display area, and
wherein the recess portion has a bottommost portion that has a first height in the thickness direction of the display apparatus that is greater than zero and less than a height of the center portion, and the adhesion-enhancing portion has a second height in the thickness direction of the display apparatus that is equal to or greater than the first height and less than the height of the center portion.

2. The display apparatus of claim 1 , wherein the dam has a stacked structure including a first layer and a second layer that covers a top surface and a side surface of the first layer, the first layer meets a surface below the first layer at first and second angles of the first layer with respect to the thickness direction, and the first angle of the first inclined portion is gentler than each of the first and second angles of the first layer.

3. The display apparatus of claim 1 , further comprising:
a touchscreen layer located on the thin-film encapsulation layer; and
a touch wiring connected to the touchscreen layer and extending to the peripheral area,
wherein the touch wiring covers the dam.

4. The display apparatus of claim 1 , further comprising an inner dam located between the display area and the dam,
wherein the inner dam has a first height less than a second height of the dam.

5. The display apparatus of claim 1 , further comprising:
an inorganic insulating layer located in the peripheral area and having an opening or a groove; and
an organic layer filling at least a portion of the opening or the groove,
wherein the substrate has a bending area located between a first area and a second area and is bent about a bending axis, and
wherein the opening or the groove overlaps the bending area.

6. The display apparatus of claim 5 , further comprising:
a touchscreen layer located on the thin-film encapsulation layer in the display area;
a touch wiring extending from the touchscreen layer to an outer edge of the dam; and
a connection wiring connected to the touch wiring and located on the organic layer.

7. The display apparatus of claim 1 , further comprising:
a thin-film transistor located in the display area and comprising a semiconductor layer, a source electrode, a drain electrode, and a gate electrode;
wherein the display device comprises a pixel electrode, an intermediate layer, and a counter electrode,
wherein the conductive layer is located on a same layer as the source electrode or the drain electrode and is electrically connected to the counter electrode.

8. The display apparatus of claim 7 , further comprising a connection conductive layer located between the conductive layer and the counter electrode,
wherein the connection conductive layer is formed of a same material as a material of the pixel electrode.

9. The display apparatus of claim 8 , wherein the dam partially contacts the connection conductive layer.

10. The display apparatus of claim 7 , further comprising a fan-out wiring located in the peripheral area on a same layer as the gate electrode,
wherein the fan-out wiring partially overlaps the conductive layer.

11. The display apparatus of claim 1 , wherein the shape of the first inclined portion and the shape of the second inclined portion are asymmetric to each other about a line that divides the first inclined portion and the second inclined portion and passes through the top surface of the dam and is perpendicular to the top surface of the substrate.

12. A display apparatus comprising:
a substrate comprising a display area displaying an image and a peripheral area located around the display area;
a display device located in the display area;
a thin-film encapsulation layer covering the display device and comprising at least one inorganic film and at least one organic film; and
a dam located in the peripheral area and surrounding at least a portion of the display area,
wherein the dam comprises a center portion, a first inclined portion connected to the center portion and extending from about a top surface of the center portion toward the substrate in a thickness direction of the display apparatus and extending toward the display area in a plan view and a second inclined portion connected to the center portion and extending from about the top surface of the center portion in an opposite direction to the first inclined portion in the plan view,
wherein the first inclined portion has a first angle with respect to a top surface of the substrate, and the second inclined portion has a second angle with respect to the top surface of the substrate,
wherein the first angle is different than the second angle;
wherein the second inclined portion comprises a recess portion and an adhesion-enhancing portion,
wherein the recess portion is disposed between the center portion and the adhesion-enhancing portion, and the adhesion-enhancing portion is located outside the recess portion from the display area, and
wherein the recess portion has a bottommost portion that has a first height in the thickness direction of the display apparatus that is greater than zero and less than a height of the center portion, and the adhesion-enhancing portion has a second height in the thickness direction of the display apparatus that is equal to or greater than the first height and less than the height of the center portion.

13. The display apparatus of claim 12 , further comprising an interlayer insulating layer located between the substrate and the dam and comprising an inorganic material,
wherein an end of the first inclined portion and an end of the second inclined portion contact the interlayer insulating layer, and a shape of the first inclined portion is a minor image of a shape of the second inclined portio

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Inho
• Seo Juyeon
• Cho Sungwoo
• Jeong Donghoon

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/8731

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

• H10K59/8723 Primary

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/131

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

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title