US-20260130061-A1 - DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME

US20260130061A1US 20260130061 A1US20260130061 A1US 20260130061A1US-20260130061-A1

Abstract

A display device includes a substrate, first electrodes disposed on the substrate, a pixel defining film covering edges of the first electrodes, a spacer disposed on the pixel defining film and disposed between the first electrodes, an organic layer disposed on the first electrodes, the pixel defining film, and the spacer, and a second electrode disposed on the organic layer. The organic layer includes a first common layer and a second common layer continuously disposed on the first electrodes, and the first common layer, the second common layer, and the second electrode do not overlap the spacer.

Inventors

Xin Xing LI
Eun Hwa Jang

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20221006

Claims (20)

1 . A display device comprising: a substrate; first electrodes disposed on the substrate; a pixel defining film covering edges of the first electrodes; a spacer disposed on the pixel defining film and disposed between the first electrodes; an organic layer disposed on the first electrodes, the pixel defining film, and the spacer; and a second electrode disposed on the organic layer, the organic layer including: a first common layer and a second common layer continuously disposed on the first electrodes, wherein the second electrode do not overlap an upper surface of the spacer.
2 . The display device of claim 1 , wherein the spacer is unitary with the pixel defining film and protrudes in a thickness direction of the pixel defining film.
3 . The display device of claim 1 , wherein the spacer does not overlap the first electrodes.
4 . The display device of claim 1 , wherein the first common layer includes a hole injection layer and a hole transport layer, and the second common layer includes an electron transport layer and an electron injection layer.
5 . The display device of claim 4 , wherein the organic layer includes a light-emitting layer disposed between the first common layer and the second common layer and overlapping the first electrodes.
6 . The display device of claim 1 , wherein an uppermost surface of each of the first common layer, the second common layer, and the second electrode is aligned and coincides with an upper surface of the spacer.
7 . The display device of claim 1 , further comprising a passivation layer disposed on the second electrode, wherein the passivation layer does not overlap an upper surface of the spacer.
8 . The display device of claim 7 , wherein an uppermost surface of each of the first common layer, the second common layer, the second electrode, and the passivation layer is aligned and coincides with the upper surface of the spacer.
9 . The display device of claim 7 , further comprising an encapsulation layer disposed on the passivation layer and including a first inorganic film, a second inorganic film, and an organic film disposed between the first inorganic film and the second inorganic film, wherein the first inorganic film contacts the upper surface of the spacer.
10 . The display device of claim 9 , wherein an uppermost surface of each of the first common layer, the second common layer, the second electrode, and the passivation layer contacts the first inorganic film.
11 . A display device comprising: a substrate; first electrodes disposed on the substrate; a pixel defining film covering edges of the first electrodes and defining a plurality of emission areas; a spacer disposed on the pixel defining film and disposed between emission areas adjacent to each other among the plurality of emission areas; an organic layer disposed on the first electrodes, the pixel defining film, and the spacer; and a second electrode disposed on the organic layer, the organic layer including: a first common layer and a second common layer continuously disposed on the first electrodes, wherein openings of the first common layer and the second electrode overlap an opening of the second electrode.
12 . The display device of claim 11 , wherein the spacer is disposed parallel to one side of an emission area among the plurality of emission areas, and a length of the spacer is equal to a length of one side of the emission area.
13 . The display device of claim 11 , wherein openings of each of the first common layer, the second common layer, and the second electrode are separated portions on the space.
14 . The display device of claim 11 , wherein the plurality of emission areas emits light of different colors, and the spacer is disposed between the emission areas emitting the light of the different colors.
15 . The display device of claim 11 , wherein the spacers do not overlap the plurality of emission areas, and are spaced apart from each other.
16 . The display device of claim 11 , wherein an uppermost surface of each of the first common layer, the second common layer, and the second electrode is aligned and coincides with an upper surface of the spacer.
17 . The display device of claim 11 , further comprising a passivation layer disposed on the second electrode, wherein the passivation layer does not overlap an upper surface of the spacer.
18 . The display device of claim 17 , wherein an uppermost surface of each of the first common layer, the second common layer, the second electrode, and the passivation layer is aligned and coincides with the upper surface of the spacer.
19 . A display device comprising: a substrate; first electrodes disposed on the substrate; a pixel defining film covering edges of the first electrodes and defining a plurality of emission areas; a spacer disposed on the pixel defining film and disposed between emission areas adjacent to each other among the plurality of emission areas; an organic layer disposed on the first electrodes, the pixel defining film, and the spacer; a second electrode disposed on the organic layer; and an encapsulation layer disposed on the second electrode wherein the organic layer including: a first common layer and a second common layer continuously disposed on the first electrodes, and wherein end portions of each of the first common layer, the second common layer, and the second electrode contact the encapsulation layer.
20 . The display device of claim 19 , wherein the encapsulation layer includes and including a first inorganic film, a second inorganic film, and an organic film disposed between the first inorganic film and the second inorganic film, and wherein the end portions of each of the first common layer, the second common layer, and the second electrode contact the first inorganic film.

Description

This application is a continuation of U.S. patent application Ser. No. 18/218,713, filed on Jul. 6, 2023, which claims priority to Korean Patent Application No. 10-2022-0128196, filed on Oct. 6, 2022, and Korean Patent Application No. 10-2023-0000169, filed on Jan. 2, 2023, and all the benefits accruing therefrom under 35 U.S.C. § 119, the content of which in their entirety is herein incorporated by reference. BACKGROUND 1. Field The disclosure relates to a display device and a method for manufacturing the same. 2. Description of the Related Art As the information society develops, the demand for display devices for displaying images is being increased and diversified. For example, display devices are being applied to various electronic devices such as smartphones, digital cameras, laptop computers, navigation devices, and smart televisions. The display device may be a flat panel display device such as a liquid crystal display device, a field emission display device, or a light-emitting display device. The light-emitting display device includes an OLED including organic light-emitting elements, an in OLED including inorganic light-emitting elements such as inorganic semiconductors, and a micro light-emitting display device including micro light-emitting elements. The organic emitting element may include two electrodes opposing each other and a light-emitting layer interposed between the two electrodes. The light-emitting layer receives electrons and holes from the two electrodes and recombines the electrons and the holes with each other to generate excitons, and may emit light while the generated excitons change from an excited state to a ground state. Since light source such as a backlight unit is not desired in the organic emitting display device including the organic light-emitting elements, the organic emitting display device has low power consumption, may be lightweight and thin, and has high quality characteristics such as a wide viewing angle, high luminance and contrast, and a fast response speed, and accordingly, is attracting attention as the next-generation display device. SUMMARY Features of the disclosure provide a display device capable of improving a color change of a low gradation and color mixing by reducing a leakage current, and a method for manufacturing the same. However, features of the disclosure are not restricted to those set forth herein. The above and other features of the disclosure will become more apparent to one of ordinary skill in the art to which the disclosure pertains by referencing the detailed description of the disclosure given below. In an embodiment of the disclosure, a display device includes a substrate, first electrodes disposed on the substrate, a pixel defining film covering edges of the first electrodes, a spacer disposed on the pixel defining film and disposed between the first electrodes, an organic layer disposed on the first electrodes, the pixel defining film, and the spacer; and a second electrode disposed on the organic layer. The organic layer includes a first common layer and a second common layer continuously disposed on the first electrodes, and the first common layer, the second common layer, and the second electrode do not overlap the spacer. In an embodiment, the spacer may be unitary with the pixel defining film and be disposed to protrude in a thickness direction of the pixel defining film. In an embodiment, the spacer may not overlap the first electrodes. In an embodiment, the first common layer may include a hole injection layer and a hole transport layer, and the second common layer may include an electron transport layer and an electron injection layer. In an embodiment, the organic layer may include a light-emitting layer disposed between the first common layer and the second common layer and overlapping the first electrodes. In an embodiment, an uppermost surface of each of the first common layer, the second common layer, and the second electrode may be aligned and coincide with an upper surface of the spacer. In an embodiment, the display device may further include a passivation layer disposed on the second electrode. The passivation layer may not overlap an upper surface of the spacer. In an embodiment, an uppermost surface of each of the first common layer, the second common layer, the second electrode, and the passivation layer may be aligned and coincide with the upper surface of the spacer. In an embodiment, the display device may further include an encapsulation layer disposed on the passivation layer and including a first inorganic film, a second inorganic film, and an organic film disposed between the first inorganic film and the second inorganic film. The first inorganic film may contact the upper surface of the spacer. In an embodiment, an uppermost surface of each of the first common layer, the second common layer, the second electrode, and the passivation layer may contact the first inorganic film. In an embodiment of the disc