US-12628473-B2 - Display device and method of fabricating display device

US12628473B2US 12628473 B2US12628473 B2US 12628473B2US-12628473-B2

Abstract

A display device includes a first electrode extending in a first direction on a substrate, a second electrode disposed parallel to the first electrode on the substrate, a third electrode separated from the first electrode by an electrode separation part on the substrate, a first insulating layer on the first to third electrodes and being patterned to correspond to the electrode separation part, a first light-emitting element between the first and second electrodes on the first insulating layer, a second insulating layer on a part of the first light-emitting element and the first insulating layer and being patterned to correspond to the electrode separation part, an electrode insulating portion overlapping an end of each of the first and third electrodes facing each other separated by the electrode separation part, and a third insulating layer overlapping the second insulating layer and the electrode insulating portion.

Inventors

Tae Ha Jin
Seul Ki Kim
Seon Beom JI
Dong Hwan Kim

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20211214
Priority Date: 20210407

Claims (12)

1 . A display device comprising: a first electrode extending in a first direction on a substrate; a second electrode disposed parallel to the first electrode on the substrate; a third electrode separated from the first electrode by an electrode separation part on the substrate; a first insulating layer on the first electrode, the second electrode, and the third electrode, the first insulating layer being patterned to correspond to the electrode separation part; a first light-emitting element between the first electrode and the second electrode on the first insulating layer; a second insulating layer on a part of the first light-emitting element and the first insulating layer, the second insulating layer being patterned to correspond to the electrode separation part; an electrode insulating portion overlapping an end of each of the first electrode and the third electrode facing each other separated by the electrode separation part; and a third insulating layer overlapping the second insulating layer and the electrode insulating portion.
2 . The display device of claim 1 , wherein the electrode insulating portion overlaps ends of the first insulating layer patterned to correspond to the electrode separation part.
3 . The display device of claim 1 , wherein the electrode insulating portion overlaps ends of the second insulating layer patterned to correspond to the electrode separation part.
4 . The display device of claim 1 , wherein the electrode insulating portion is spaced apart from the first light-emitting element.
5 . The display device of claim 1 , further comprising: a thin-film transistor on the substrate; and a via layer that provides a flat surface over the thin-film transistor and supports the first electrode, the second electrode, and the third electrode, wherein the electrode insulating portion directly overlaps an upper surface of the via layer exposed at the electrode separation part.
6 . The display device of claim 5 , further comprising: a first bank protruding from the upper surface of the via layer to support the first electrode, the second electrode, and the third electrode, wherein the electrode insulating portion is spaced apart from the first bank.
7 . The display device of claim 6 , further comprising: a second bank disposed on the first insulating layer and spaced apart from and surrounding the first light-emitting element and the first bank, wherein the electrode insulating portion is spaced apart from the second bank.
8 . The display device of claim 1 , further comprising: a first contact electrode electrically connecting a first end of the first light-emitting element with the first electrode; and a second contact electrode electrically connecting a second end of the first light-emitting element with the second electrode, wherein the first contact electrode and the second contact electrode are insulated from the first electrode, the second electrode, and the third electrode by the electrode insulating portion.
9 . The display device of claim 1 , wherein the third insulating layer overlaps an end of the electrode insulating portion on the first electrode, and the third insulating layer overlaps another end of the electrode insulating portion on the second electrode.
10 . The display device of claim 1 , further comprising: a fourth electrode separated from the second electrode by the electrode separation part on the substrate, wherein the electrode insulating portion overlaps an end of each of the second electrode and the fourth electrode facing each other at the electrode separation part.
11 . The display device of claim 10 , further comprising: a second light-emitting element between the third electrode and the fourth electrode on the first insulating layer; a second contact electrode electrically connecting a second end of the first light-emitting element with the second electrode; and a third contact electrode disposed in parallel with a part of the second contact electrode, wherein the second contact electrode extends from above the second electrode to above the third electrode to electrically connect a first end of the second light-emitting element with the third electrode, and the third contact electrode electrically connects a second end of the second light-emitting element with the fourth electrode.
12 . The display device of claim 11 , wherein the electrode insulating portion is spaced apart from the second light-emitting element.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority to and benefits of Korean Patent Application No. 10-2021-0044988 under 35 U.S.C. § 119, filed on Apr. 7, 2021 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. BACKGROUND 1. Technical Field The disclosure relates to a display device and a method of fabricating the same. 2. Description of the Related Art As information-oriented society evolves, various demands for display devices are ever increasing. For example, display devices are being employed by a variety of electronic devices such as smart phones, digital cameras, laptop computers, navigation devices, and smart televisions. Display devices may be flat panel display devices such as a liquid-crystal display device, a field emission display device, or an organic light-emitting display device. Among such flat panel display devices, a light-emitting display device may include a light-emitting element that can emit light on its own, so that each of the pixels of the display panel can emit light by themselves. Accordingly, a light-emitting display device can display images without a backlight unit that supplies light to the display panel. A light-emitting element may be an organic light-emitting diode using an organic material as a fluorescent material or an inorganic light-emitting diode using an inorganic material as a fluorescent material. SUMMARY Aspects of the disclosure provide a display device capable of improving the emission efficiency by preventing a parasitic current from flowing between electrodes, and a method of fabricating the same. It should be noted that aspects of the disclosure are not limited to the above, and other aspects of the disclosure will be apparent to those skilled in the art from the following descriptions. According to an embodiment of the disclosure, a display device may include a first electrode extending in a first direction on a substrate, a second electrode disposed parallel to the first electrode on the substrate, a third electrode separated from the first electrode by an electrode separation part on the substrate, a first insulating layer on the first electrode, the second electrode, and the third electrode, the first insulating layer being patterned to correspond to the electrode separation part, a first light-emitting element between the first electrode and the second electrode on the first insulating layer, a second insulating layer on a part of the first light-emitting element and the first insulating layer, the second insulating layer being patterned to correspond to the electrode separation part, an electrode insulating portion overlapping an end of each of the first electrode and the third electrode facing each other separated by the electrode separation part, and a third insulating layer overlapping the second insulating layer and the electrode insulating portion. The electrode insulating portion may overlap ends of the first insulating layer patterned to correspond to the electrode separation part. The electrode insulating portion may overlap ends of the second insulating layer patterned to correspond to the electrode separation part. The electrode insulating portion may be spaced apart from the first light-emitting element. The display may further comprise a thin-film transistor on the substrate, and a via layer that provides a flat surface over the thin-film transistor and supports the first electrode, the second electrode, and the third electrode. The electrode insulating portion may directly overlap an upper surface of the via layer exposed at the electrode separation part. The display device may further comprise a first bank protruding from the upper surface of the via layer to support the first electrode, the second electrode, and the third electrode. The electrode insulating portion may be spaced apart from the first bank. The display device may further comprise a second bank disposed on the first insulating layer and spaced apart from and surrounding the first light-emitting element and the first bank. The electrode insulating portion may be spaced apart from the second bank. The display device may further comprise a first contact electrode electrically connecting a first end of the first light-emitting element with the first electrode, and a second contact electrode electrically connecting a second end of the first light-emitting element with the second electrode. The first contact electrode and the second contact electrode may be insulated from the first electrode, the second electrode, and the third electrode by the electrode insulating portion. The third insulating layer may overlap an end of the electrode insulating portion on the first electrode, and the third insulating layer may overlap another end of the electrode insulating portion on the second electrode. The display device may further comprise a fourth electrode separated from the second electrode by the elec