Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016013255-A1
Application number	US-201514794456-A
Country	US
Kind code	A1
Filing date	Jul 8, 2015
Priority date	Jul 11, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

An organic EL display device in an embodiment according to the present invention includes a plurality of first electrodes provided corresponding to each of a plurality of pixels above a first substrate, a bank layer provided above the first substrate between adjacent first electrodes to cover an end part of the first electrode, an organic EL layer provided to cover the plurality of first electrodes and the bank layer, a second electrode provided above the organic EL layer, the organic EL layer includes a first region overlapping the bank layer, and a second region overlapping the plurality of the first electrodes, and a first resistance of the first region is larger than a second resistance of the second region.

First claim

What is claimed is:

1 . An organic EL display device comprising:
a plurality of first electrodes provided corresponding to each of a plurality of pixels above a first substrate; a bank layer provided above the first substrate and located at a boundary between a pair of the first electrodes which are adjacent each other to cover end parts of the pair of the first electrodes; an organic EL layer provided to cover the plurality of first electrodes and the bank layer; a second electrode provided above the organic EL layer; the organic EL layer includes a first region overlapping the bank layer, and a second region overlapping the plurality of the first electrodes; and a first resistance of the first region is larger than a second resistance of the second region.

2 . The organic EL display device according to claim 1 , wherein the bank layer includes a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

3 . The organic EL display device according to claim 1 , wherein the second electrode includes a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

4 . The organic EL display device according to claim 1 , wherein a sealing film is further provided above the second electrode, the sealing film including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

5 . The organic EL display device according to claim 1 , wherein a second substrate is provided facing the first substrate, and a resin layer is further provided between the first substrate and the second substrate and overlapping the first region and the plurality of second regions, the resin layer including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

6 . An organic EL display device comprising:
a first substrate; a first pixel and a second pixel adjacent to the first pixel provided in the first substrate; a first pixel electrode provided in the first pixel; a second pixel electrode provided in the second pixel; a bank layer located at a boundary between the first electrode and the second electrode, the bank layer exposing the first pixel electrode and the second pixel electrode; an organic EL layer provided across the first pixel, the second pixel and the bank layer; a common electrode provided above the organic EL layer and across the first pixel, the second pixel and the bank layer; the organic EL layer includes a first region overlapping the bank layer and a second region overlapping the first pixel electrode in a planar view; and a resistance of the first region is larger than a second resistance of the second region.

7 . The organic EL display device according to claim 6 , wherein a thin film transistor is provided between the first substrate and the first pixel electrode, a metal layer covering a semiconductor layer of the thin film transistor is provided between the first substrate and the thin film transistor, and the metal layer includes a plurality of slits corresponding to the first region.

8 . The organic EL display device according to claim 7 , wherein a terminal is provided in the first substrate and the metal layer is connected to the terminal.

9 . The organic EL display device according to claim 6 , wherein the first pixel includes a first light emitting region,
the second pixel includes a second light emitting region, a first spaced gap and a second spaced gap is included between the first light emitting region and the second light emitting region, the second spaced gap smaller than the first spaced gap, a first boundary having the first spaced gap and a second boundary having the second spaced gap is included in a boundary of the first light emitting region and the second light emitting region, the first region is overlapped with the second boundary in a planar view.

10 . The organic EL display device according to claim 6 , wherein the bank layer including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

11 . The organic EL display device according to claim 6 , wherein the common electrode including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

12 . The organic EL display device according to claim 6 , wherein a sealing film is further provided above the common electrode, the sealing film including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

13 . The organic EL display device according to claim 12 , wherein a second substrate is provided facing the first substrate, and a filler material is further provided above the sealing film, the filler material including a light shielding region in an area overlapping the first region, and
a translucency of the light shielding region is lower than that of an area overlapping the second region.

14 . A method of manufacturing an organic EL display device comprising:
forming a plurality of first electrodes above a first surface of a first substrate; forming a bank layer at a boundary between a pair of the first electrodes which are adjacent each other so that the bank layer covers end parts of the pair of the first electrodes above the first surface; forming an organic EL layer above the plurality of first electrodes and the bank layer; forming a second electrode above the organic EL layer; providing the organic EL layer with a first region overlapping the bank layer and a second region overlapping the first pixel electrode in a planar view; irradiating an energy beams from a side of a second surface to the first region, the second surface facing the first surface; and making a first resistance of the first region larger than a second resistance of the second region.

15 . The method of manufacturing an organic EL display device according to claim 14 , wherein the energy beam is irradiated using the plurality of first electrodes as a mask.

16 . The method of manufacturing an organic EL display device according to claim 14 , wherein the energy beam is an ultraviolet beam, infrared beam, electron beam or high intensity white light beam.

17 . The method of manufacturing an organic EL display device according to claim 14 , wherein a metal layer including a plurality of slits corresponding to the first region is formed between the first substrate and the plurality of first electrodes, a first insulation layer is formed above the metal layer, a plurality of thin film transistors is formed above the first insulation layer, a second insulation layer is formed above the plurality of thin film transistors, and the energy beam is irradiated using the metal layer as a mask.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro

Classifications

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K50/11 Primary

  characterised by the electroluminescent [EL] layers · CPC title

• H01L27/3272

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic