Display device and method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-11868552-B2
Application number	US-202217979816-A
Country	US
Kind code	B2
Filing date	Nov 3, 2022
Priority date	Mar 9, 2018
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

The method for manufacturing a display device includes forming a light emitting element and a terminal on a substrate, forming a sealing film including a first inorganic insulating film and a second inorganic insulating film to cover the light emitting element and the terminal, forming a resist having a taper shape in which a thickness of an end portion on the sealing film becomes thinner as it goes to the terminal side by using a gray-tone mask, forming a taper shape in which thicknesses in end portions of the first inorganic insulating film and the second inorganic insulating film becomes thinner as it goes to the terminal side by etching, forming a touch electrode above the sealing film and forming wiring connected to the terminal via the end portions together with connecting to the touch electrode for detecting a touched position.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a light emitting element positioned on the substrate;
a terminal positioned on the substrate;
a sealing film including at least one inorganic insulating film, and covering the light emitting element;
a touch sensor including a touch electrode positioned on the sealing film; and
a wiring connecting the touch electrode with the terminal,
wherein
an end portion of the at least one inorganic insulating film has a first area and a second area,
the first area and the second area continuously form an outermost border of the sealing film and a part of the outermost border of the sealing film,
the first area has a first taper shape having a first taper angle, a thickness of the first taper shape decreasing as the first taper shape goes to an end of the substrate,
the second area has a second taper shape having a second taper angle, a thickness of the second taper shape decreasing as the second taper shape goes to the end of the substrate,
the second taper angle is larger than the first taper angle, and
the wiring overlaps the first area and does not overlap the second area.

2. The display device according to claim 1 , wherein
the end portions have a side overlapping the wiring, and
the first area includes an entirety of the side.

3. The display device according to claim 1 , wherein
the first area protrudes from a side of the second area toward a side of the light emitting element.

4. The display device according to claim 1 , wherein
the first area protrudes from a side of the light emitting element toward a side of the second area.

5. A display device comprising:
a substrate;
a light emitting element positioned on the substrate;
a terminal positioned on the substrate;
a sealing film including at least one inorganic insulating film, and covering the light emitting element;
a touch sensor including a touch electrode positioned on the sealing film; and
a wiring connecting the touch electrode with the terminal,
wherein
an end portion of the at least one inorganic insulating film has a first area and a second area,
the first area has a first taper shape having a first taper angle, a thickness of the first taper shape decreasing as the first taper shape goes to a side of the terminal,
the second area has a second taper shape having a second taper angle, a thickness of the second taper shape decreasing as the second taper shape goes to the side of the terminal,
the second taper angle is larger than the first taper angle, and
the wiring overlaps the first area and does not overlap the second area.

6. The display device according to claim 5 , wherein
the end portions have a side overlapping the wiring, and
the first area includes an entirety of the side.

7. The display device according to claim 5 , wherein
the first area protrudes from a side of the second area toward a side of the light emitting element.

8. The display device according to claim 5 , wherein
the first area protrudes from a side of the light emitting element toward a side of the second area.

9. A display device comprising:
a substrate;
a light emitting element positioned on the substrate;
a terminal positioned on the substrate;
a sealing film including at least one inorganic insulating film, and covering the light emitting element;
a touch sensor including a touch electrode positioned on the sealing film; and
a wiring connecting the touch electrode with the terminal,
wherein
an end portion of the at least one inorganic insulating film has a first area and a second area,
the first area has a first taper shape having a first taper angle, a thickness of the first taper shape decreasing as the first taper shape goes to end of the substrate,
the second area has a second taper shape having a second taper angle, a thickness of the second taper shape decreasing as the second taper shape goes to the end of the substrate,
the second taper angle is larger than the first taper angle, and
the wiring overlaps the first area and does not overlap the second area.

10. The display device according to claim 9 , wherein
the end portions have a side overlapping the wiring, and
the first area includes an entirety of the side.

11. The display device according to claim 9 , wherein
the first area protrudes from a side of the second area toward a side of the light emitting element.

12. The display device according to claim 9 , wherein
the first area protrudes from a side of the light emitting element toward a side of the second area.

Assignees

• Japan Display Inc

Inventors

• Matsumoto Yuko
• Akimoto Hajime
• Miyamoto Mitsuhide
• Tada Yusuke

Classifications

• H10K59/8731

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

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title