US 11,107,867 B2Granted

Display device and manufacturing method thereof

AssigneeSamsung Display Co., Ltd.

InventorsJin Sung An, Jung Hwa Kim, Se Wan Son, Wang Woo Lee, Ji Seon Lee, Moo Soon Ko

Life of this patent

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Abstract

A display device includes a substrate, a switching transistor and a driving transistor positioned on the substrate, a first electrode connected to the driving transistor, a second electrode positioned on the first electrode, and a pixel definition layer positioned between the first electrode and the second electrode, where the pixel definition layer includes a first portion, and a second portion having a thickness less than that of the first portion, where a pixel opening defined in the pixel definition layer is enclosed by the first portion, and the second portion overlaps the first electrode and the second electrode.

Claims5

Dependent claims

A method for manufacturing a display device, the method comprising:

forming a first electrode on a substrate;
forming an organic material layer on the substrate and the first electrode;
patterning the organic material layer to form a pixel definition layer including a first portion, a second portion, and a pixel opening enclosed by the first portion;
forming an organic emission layer on the first electrode;
and
forming a second electrode on the organic emission layer,
wherein the second portion is thinner than the first portion, and
the first portion defines the pixel opening,
wherein the first portion is elevated more than the second portion from the first electrode, and
the first portion of the pixel definition layer is disposed between the pixel opening and the second portion.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/556,757Filed 30 Aug 2019 · division
Priority: KR 10-2017-006703330 May 2017
Published: US 2019/0386078 A119 Dec 2019
Granted: 31 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H10K 59/35
Devices specially adapted for multicolour light emission: comprising red-green-blue [RGB] subpixels
H10K 59/1213
Characterised by the geometry or disposition of pixel elements: the pixel elements being TFTs
H10K 59/122
Active-matrix OLED [AMOLED] displays: pixel-defining structures or layers, e.g. banks
H10K 59/123
Active-matrix OLED [AMOLED] displays: connection of the pixel electrodes to the thin film transistors [TFT]

Family

Application15/870,073Parent of this division · filed 12 Jan 2018
US 2019/0386078 A1Pre-grant publication · published 19 Dec 2019
US 10,453,905 B2Parent of this division
US 2018/0350886 A1Published application
US 11,107,867 B2This patent

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