US 10,707,283 B2Granted

Organic EL element, organic EL display panel using same, and organic EL display panel manufacturing method

AssigneeJoled Inc.

InventorTetsuro Kondo

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Abstract

An organic EL display panel in which pixels are arranged in a matrix, including: light-emitting layers disposed above pixel electrode layers in intervals between adjacent ones of column banks; an opposing electrode layer disposed above the light-emitting layers, the opposing electrode layer including a light-transmissive material; column light-shielding layers disposed higher than the pixel electrode layers, extending in the column direction, arranged side-by-side in the row direction, and overlapping row-direction edge portions of the pixel electrode layers in plan view of a substrate; and row light-shielding layers disposed higher than the pixel electrode layers, extending in the row direction, arranged side-by-side in the column direction, overlapping column-direction edge portions of the pixel electrode layers and partially overlapping contact regions in plan view of the substrate.

Claims13

Dependent claims

An organic EL element, comprising:

a substrate;
a thin film transistor disposed in the substrate;
a pixel electrode layer disposed on the substrate, the pixel electrode layer including a light-reflective material;
banks disposed on the substrate and on the pixel electrode layer, covering edge portions of the pixel electrode layer and a portion of a contact region of the pixel electrode layer, the contact region being for electrically connecting the pixel electrode layer;
a light-emitting layer disposed above the pixel electrode layer, wherein the light-emitting layer extends continuously in a column direction above the banks and is interrupted by the banks in a row direction;
an opposing electrode layer disposed above the light-emitting layer, the opposing electrode layer including a light-transmissive material;
and
a light-shielding layer including a column light-shielding layer that extends in the column direction and a row light-shielding layer that extends in the row direction, and disposed higher than the pixel electrode layer, the light-shielding layer overlapping the edge portions of the pixel electrode layers, wherein:
a source or a drain of the thin-film transistor is connected to the pixel electrode layer via a connecting recess in which a portion of the pixel electrode layer is recessed in a direction of the substrate,
in a plan view of the substrate, the light-shielding layer does not completely overlap the contact region,
a width in the row direction of the column light-shielding layer is greater than a distance in the row direction between adjacent ones of the pixel electrode layers, and a width in the column direction of the row light-shielding layer is greater than a distance in the column direction between adjacent ones of the pixel electrode layers,
any two light-emitting layers disposed in intervals between row banks that are adjacent to each other in the column direction emit the same color of light, and
the light-shielding layer is formed between each pixel electrode and does not overlap the connecting recess.

10 more elements

An organic EL element comprising:

a substrate;
a thin film transistor disposed in the substrate;
a pixel electrode layer disposed on the substrate, the pixel electrode layer including a light-reflective material;
banks disposed on the substrate and on the pixel electrode layer, covering edge portions of the pixel electrode layer, wherein the banks include a row bank linearly extending in a row direction and a column bank linearly extending in a column direction;
a light-emitting layer disposed above the pixel electrode layer, wherein the light-emitting layer extends continuously in the column direction above the banks and is interrupted by the banks in the row direction;
an opposing electrode layer disposed above the light-emitting layer, the opposing electrode layer including a light-transmissive material;
and
a light-shielding layer including a column light-shielding layer that extends in the column direction and a row light-shielding layer that extends in the row direction, and disposed higher than the pixel electrode layer, the light-shielding layer overlapping the edge portions of the pixel electrode layers, wherein:
a source or a drain of the thin-film transistor is connected to the pixel electrode layer via a connecting recess in which a portion of the pixel electrode layer is recessed in a direction of the substrate,
a portion of the row bank covering the connecting recess,
in a plan view of the substrate, the light-shielding layer partially overlaps the row bank,
any two light-emitting layers disposed in intervals between row banks that are adjacent to each other in the column direction emit the same color of light, and
the light-shielding layer is formed between each pixel electrode and does not overlap the connecting recess.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/001,399Filed 6 Jun 2018 · continuation
Priority: JP 2015-1757587 Sep 2015
Published: US 2018/0286935 A14 Oct 2018
Granted: 7 Jul 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H10K 59/122
Active-matrix OLED [AMOLED] displays: pixel-defining structures or layers, e.g. banks
H10D 86/411
Characterised by multiple TFTs: characterised by materials, geometry or structure of the substrates
H10D 86/60
Characterised by multiple TFTs: wherein the TFTs are in active matrices
H10K 59/123
Active-matrix OLED [AMOLED] displays: connection of the pixel electrodes to the thin film transistors [TFT]

Family

Application15/252,463Parent of this continuation · filed 31 Aug 2016
US 2018/0286935 A1Pre-grant publication · published 4 Oct 2018
US 10,014,354 B2Parent of this continuation
US 2017/0069696 A1Published application
US 10,707,283 B2This patent

From the US filing history. Foreign family members aren’t listed.