Organic electroluminescence display device

Patent metadata

Field	Value
Publication number	US-12543479-B2
Application number	US-202318099261-A
Country	US
Kind code	B2
Filing date	Jan 20, 2023
Priority date	Mar 2, 2022
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

An organic electroluminescence display device includes a substrate including a first surface, a first area arranged on the first surface and including one or more first spacers and a plurality of pixels each including a light-emitting layer, a third area arranged on the first surface, surrounding the first area, and not including spacers, and a second area arranged on the first surface, surrounding the third area, and including one or more second spacers. The plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction, and a length of the third area in the second direction is a total length of pitches for at least two pixels.

First claim

What is claimed is:

1 . An organic electroluminescence display device comprising:
a substrate including a first surface; a first area arranged on the first surface and including one or more first spacers and a plurality of pixels each including a light-emitting layer; a third area arranged on the first surface, surrounding the first area, and not including spacers, and a second area arranged on the first surface, surrounding the third area, and including one or more second spacers, wherein the plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction, a length of the third area in the first direction is a total length of pitches for at least two pixels, a height between the first surface and an upper surface of the second spacer is higher than a height between the first surface and an upper surface of the first spacer in a side view, the first spacers include a spacer having a first height between the first surface and an upper surface of the first spacer and a spacer having a second height between the first surface and the upper surface of the first spacer, and the first height is higher than the second height.

2 . The organic electroluminescence display device according to claim 1 , wherein
the third area does not include the light-emitting layer and includes a first layer arranged between the light-emitting layer and the first surface.

3 . The organic electroluminescence display device according to claim 1 , wherein
a density of wirings arranged in the third area is higher than a density of wirings arranged in the first area.

4 . The organic electroluminescence display device according to claim 1 , wherein
the plurality of pixels each including a light-emitting layer includes a first pixel having a first light-emitting layer, a second pixel having a second light-emitting layer, and a third pixel having a third light-emitting layer, and the first light-emitting layer, the second light-emitting layer and the third light-emitting layer emit light in different colors.

5 . The organic electroluminescence display device according to claim 4 , wherein
the first spacer of the first height is arranged between the third pixel and a third pixel adjacent to the third pixel, and the first spacer of the second height is arranged between the first pixel and the second pixel.

6 . An organic electroluminescence display device comprising:
a substrate including a first surface; a first area arranged on the first surface and including one or more first spacers and a plurality of pixels each including a light-emitting layer; a third area arranged on the first surface, surrounding the first area, and not including spacers; and a second area arranged on the first surface, surrounding the third area, and including one or more second spacers,
wherein
the plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction,
a length of the third area in the first direction is a total length of pitches for at least two pixels,
the first area further includes one or more second spacers,
the first spacers and the second spacers arranged in the first area and the second spacers arranged in the second area are arranged on the same layer,
in a plan view,
a first group includes the first spacers in the first area and the second spacers in the second area, arranged on the same line parallel to the first direction,
a second group includes the second spacers in the first area and the second spacers in the second area, arranged on the same line parallel to the first direction,
the first group and the second group are arranged alternately,
a third group includes the first spacers arranged on the same line parallel to the second direction,
a fourth group includes the second spacers in the first area arranged on the same line parallel to the second direction, and
the third group and the fourth group are arranged alternately.

7 . The organic electroluminescence display device according to claim 6 , wherein
a height between the first surface and an upper surface of the second spacer is higher than a height between the first surface and an upper surface of the first spacer in a side view.

8 . The organic electroluminescence display device according to claim 6 , wherein
the third area does not include the light-emitting layer and includes a first layer arranged between the light-emitting layer and the first surface.

9 . The organic electroluminescence display device according to claim 6 , wherein
a density of wirings arranged in the third area is higher than a density of wirings arranged in the first area.

10 . An organic electroluminescence display device comprising:
a substrate including a first surface; a first insulating layer on a side of the first surface of the substrate, the first insulating layer including an upper surface on an opposite side of the first surface of the substrate; a first area arranged on the upper surface of the first insulating layer and including one or more first spacers and a plurality of pixels each including a light-emitting layer; a third area arranged on the upper surface of the first insulating layer, surrounding the first area, and not including spacers; and a second area arranged on the upper surface of the first insulating layer, surrounding the third area, and including one or more second spacers,
wherein
the plurality of pixels each including the light-emitting layer is arranged along a first direction and a second direction intersecting the first direction,
a length of the third area in the first direction is a total length of pitches for at least two pixels, and
the first spacers and the second spacers are in direct contact with the upper surface of the first insulating layer.

11 . The organic electroluminescence display device according to claim 10 , wherein
a height between the first surface and an upper surface of the second spacer is higher than a height between the first surface and an upper surface of the first spacer in a side view.

12 . The organic electroluminescence display device according to claim 10 , further comprising;
a second insulating layer on the first insulating layer, wherein the second insulating layer includes the first spacers and the second spacers.

13 . The organic electroluminescence display device according to claim 10 , wherein
each of the plurality of pixels further includes a pixel electrode, and the first insulating layer covers an end portion of the pixel electrode.

14 . The organic electroluminescence display device according to claim 10 , wherein
each of the plurality of pixels further includes
a pixel electrode on the first insulating layer and
a first organic layer between the pixel electrode and the light-emitting layer,
the third area includes a plurality of dummy pixels, each of the plurality of dummy pixels includes the pixel electrode and the first organic layer, and each of the plurality of dummy pixels does not include the light-emitting layer.

15 . The organic electroluminescence display device according to claim 14 , wherein
the plurality of dummy pixels does not display an image.

Assignees

• Magnolia White Corp

Inventors

• Yanagisawa Sho
• Ishikawa Masato
• Nishino Tatsuya
• Takahashi Hideyuki
• Tabatake Hiroshi

Classifications

• H10K59/8722

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

• H10K59/131

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

• H10K59/8723 Primary

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

• H10K71/166

  using selective deposition, e.g. using a mask · CPC title

• H10K59/88

  Dummy elements, i.e. elements having non-functional features · CPC title