US 2023/0141265 A1Published application

Organic electroluminescence display device

AssigneeSamsung Display Co., Ltd.

InventorsJungjin YANG, Myunghwan KIM, Seohyun KIM, Ji-young KIM, Jinwoo PARK, Wonjun SONG, Taewoong YOO, Soojung YOUN, Kwanhee LEE, Seokjae LEE

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Abstract

An organic electroluminescence display device includes: a substrate; a first electrode including a first sub-electrode and a second sub-electrode spaced apart from each other and on the substrate; a first light emitting unit on the first electrode; a charge generation unit on the first light emitting unit; a second light emitting unit on the charge generation unit; and a second electrode on the second light emitting unit, wherein the first light emitting unit comprises a first light emitting layer correspondingly on the first sub-electrode; and a second light emitting layer correspondingly on the second sub-electrode, wherein the second light emitting unit comprises a third light emitting layer correspondingly on the first light emitting layer; and a fourth light emitting layer correspondingly on the second light emitting layer.

Claims20

Dependent claims

A light emitting display device comprising:

a display panel;
and
a touch sensing unit on the display panel,
wherein the display panel comprises:
a substrate including a first light emitting region, a second light emitting region, and a non-light emitting region;
a first electrode comprising a first sub-electrode on the first light emitting region and a second sub-electrode on the second light emitting region;
a first light emitting unit on the first electrode;
a charge generation unit comprising an n-type charge generation layer on the first light emitting unit and a p-type charge generation layer on the n-type charge generation layer;
a second light emitting unit on the charge generation unit;
and
a second electrode on the second light emitting unit,
wherein the first light emitting unit comprises a first light emitting layer on the first sub-electrode, and a second light emitting layer on the second sub-electrode,
wherein the second light emitting unit comprises a third light emitting layer on the first light emitting layer, and a fourth light emitting layer on the second light emitting layer,
wherein one of the n-type charge generation layer and the p-type charge generation layer comprises a first sub charge generation layer on the first light emitting region and a second sub charge generation layer on the second light emitting region.

11 more elements

A light emitting display device comprising:

a display panel;
and
an input sensing unit on the display panel,
wherein the display panel comprises:
a substrate including a first light emitting region, a second light emitting region, a third light emitting region, and a non-light emitting region;
a first electrode comprising a first sub-electrode on the first light emitting region;
a second sub-electrode on the second light emitting region;
and a third sub-electrode on the third light emitting region;
a first light emitting unit on the first electrode;
a charge generation unit comprising an n-type charge generation layer on the first light emitting unit and a p-type charge generation layer on the n-type charge generation layer;
a second light emitting unit on the charge generation unit;
and
a second electrode on the second light emitting unit,
wherein the first light emitting unit comprises a first red light emitting layer on the first sub-electrode, a first green light emitting layer on the second sub-electrode, and a first blue light emitting layer on the third sub-electrode,
wherein the n-type charge generation layer comprises an electron transport material and a n-type dopant, and the p-type charge generation layer comprises a hole transport material and a p-type dopant,
wherein the second light emitting unit comprises a second red light emitting layer on the first red light emitting layer, a second green light emitting layer on the first green light emitting layer;
and a second blue light emitting layer on the first blue light emitting layer,
wherein the n-type charge generation layer is arranged on the first light emitting region, the second light emitting region, the third light emitting region, and the non-light emitting region,
wherein the p-type charge generation layer comprises a first p-type charge generation layer corresponding to the first light emitting region, a second p-type charge generation layer corresponding to the second light emitting region, and a third p-type charge generation layer corresponding to the third light emitting region, and the p-type charge generation layer is on the n-type charge generation layer, and
wherein a doping ratio of the p-type dopant is 2 wt% to 15 wt%.

17 more elements

A light emitting display device comprising:

a substrate including a first light emitting region, a second light emitting region, a third light emitting region, and a non-light emitting region;
a first electrode comprising a first sub-electrode on the first light emitting region, a second sub-electrode on the second light emitting region, and a third sub-electrode on the third light emitting region;
a first light emitting unit on the first electrode;
a charge generation unit comprising an n-type charge generation layer on the first light emitting unit, and a p-type charge generation layer on the n-type charge generation layer;
a second light emitting unit on the charge generation unit;
and
a second electrode on the second light emitting unit,
wherein the first light emitting unit comprises a first red light emitting layer on the first sub-electrode, a first green light emitting layer on the second sub-electrode, and a first blue light emitting layer on the third sub-electrode,
wherein the second light emitting unit comprises a second red light emitting layer on the first red light emitting layer, a second green light emitting layer on the first green light emitting layer, and a second blue light emitting layer on the first blue light emitting layer,
wherein the n-type charge generation layer is arranged on the first light emitting region, the second light emitting region, the third light emitting region, and the non-light emitting region,
wherein the p-type charge generation layer comprises a first p-type charge generation layer corresponding to the first light emitting region, a second p-type charge generation layer corresponding to the second light emitting region, and a third p-type charge generation layer corresponding to the third light emitting region, and the p-type charge generation layer is on the n-type charge generation layer, and
wherein a conductivity of the p-type charge generation layer is equal to or less than about 1.5×10-6 s/m.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/148,194Filed 29 Dec 2022
Priority: KR 10-2018-004751924 Apr 2018
Published: 11 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H10K 59/35
Devices specially adapted for multicolour light emission: comprising red-green-blue [RGB] subpixels
H10K 50/15
Carrier transporting layers: hole transporting layers
H10K 50/16
Carrier transporting layers: electron transporting layers
H10K 50/19
OLEDs or polymer light-emitting diodes [PLED]: tandem OLEDs

Family

Application16/383,362Continuation · filed 12 Apr 2019
Application17/352,111Continuation · filed 18 Jun 2021
Application18/148,194Continuation
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From the US filing history. Foreign family members aren’t listed.