US-12622103-B2 - Display device and method of manufacturing the display device

US12622103B2US 12622103 B2US12622103 B2US 12622103B2US-12622103-B2

Abstract

A display device includes pixels in a display area, a first alignment electrode and a second alignment electrode that are spaced apart from each other in the pixels and extend in a first direction, a first auxiliary electrode and a second auxiliary electrode that cross the pixels and extend in a second direction intersecting the first direction, and light emitting elements that are disposed between the first alignment electrode and the second alignment electrode. A first end of the light emitting elements faces the first alignment electrode, and a second end of the light emitting elements faces the second alignment electrode.

Inventors

Joo Nyung Jang

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230613
Priority Date: 20221116

Claims (20)

1 . A display device, comprising: pixels in a display area; a first alignment electrode and a second alignment electrode that are spaced apart from each other in the pixels and extend in a first direction; a first auxiliary electrode and a second auxiliary electrode that cross the pixels and extend in a second direction intersecting the first direction; and light-emitting elements that are disposed between the first alignment electrode and the second alignment electrode, wherein the first auxiliary electrode and the second auxiliary electrode are electrically disconnected from the light-emitting elements, wherein a first end of the light-emitting elements faces the first alignment electrode, and wherein a second end of the light-emitting elements faces the second alignment electrode.
2 . The display device according to claim 1 , further comprising an auxiliary line that extends in the first direction in a non-display area surrounding the display area.
3 . The display device according to claim 2 , wherein the first auxiliary electrode and the second auxiliary electrode are electrically connected to the auxiliary line.
4 . The display device according to claim 1 , further comprising an alignment line that extends in the second direction between the pixels.
5 . The display device according to claim 4 , wherein the first alignment electrode and the second alignment electrode are electrically connected to the alignment line.
6 . The display device according to claim 1 , wherein the first alignment electrode and the second alignment electrode are alternately arranged in the second direction.
7 . The display device according to claim 1 , wherein the first auxiliary electrode and the second auxiliary electrode are alternately arranged in the first direction.
8 . The display device according to claim 1 , wherein a distance between the first alignment electrode and the second alignment electrode is less than a distance between the first auxiliary electrode and the second auxiliary electrode.
9 . The display device according to claim 1 , further comprising an insulating layer between the first auxiliary electrode and the second auxiliary electrode and between the first alignment electrode and the second alignment electrode.
10 . The display device according to claim 1 , further comprising connection electrodes disposed on the light-emitting elements.
11 . A method of manufacturing a display device, the method comprising: providing a first alignment electrode and a second alignment electrode that are spaced apart from each other in pixels provided in a display area; firstly aligning light-emitting elements in a first alignment direction between the first alignment electrode and the second alignment electrode; providing a first auxiliary electrode and a second auxiliary electrode that extend across the pixels; secondly aligning the light-emitting elements in a second alignment direction intersecting the first alignment direction between the first auxiliary electrode and the second auxiliary electrode; and thirdly aligning the light-emitting elements in the first alignment direction so that a first end of the light-emitting elements faces the first alignment electrode and a second end of the light-emitting elements faces the second alignment electrode.
12 . The method according to claim 11 , wherein the first alignment electrode and the second alignment electrode extend in a first direction.
13 . The method according to claim 12 , wherein the first alignment direction is perpendicular to the first direction.
14 . The method according to claim 12 , wherein the first auxiliary electrode and the second auxiliary electrode extend in a second direction perpendicular to the first direction.
15 . The method according to claim 14 , wherein the second direction is perpendicular to the second alignment direction.
16 . The method according to claim 12 , wherein the first auxiliary electrode and the second auxiliary electrode extend in a second direction inclined with respect to the first direction.
17 . The method according to claim 16 , wherein the second direction is perpendicular to the second alignment direction.
18 . The method according to claim 12 , further comprising forming an auxiliary line that extends in the first direction in a non-display area surrounding the display area and is electrically connected to the first auxiliary electrode and the second auxiliary electrode.
19 . The method according to claim 11 , wherein a distance between the first alignment electrode and the second alignment electrode is less than a distance between the first auxiliary electrode and the second auxiliary electrode.
20 . The method according to claim 11 , further comprising forming connection electrodes on the thirdly aligned light-emitting elements.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority to and benefits of Korean Patent Application No. 10-2022-0153900 under 35 U.S.C. § 119, filed on Nov. 16, 2022 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 manufacturing the display device. 2. Description of the Related Art Recently, as interest in information display is increasing, research and development for a display device is continuously being conducted. SUMMARY An aspect to be solved by the disclosure is to provide a display device and a method of manufacturing the display device capable of improving an alignment degree of light emitting elements. Aspects of the disclosure are not limited to the above-described aspect, and other technical aspects which are not described will be clearly understood by those skilled in the art from the following description. According to an embodiment, a display device may include pixels in a display area, a first alignment electrode and a second alignment electrode that are spaced apart from each other in the pixels and extend in a first direction, a first auxiliary electrode and a second auxiliary electrode that cross the pixels and extend in a second direction intersecting the first direction, and light emitting elements disposed between the first alignment electrode and the second alignment electrode. A first end of the light emitting elements may face the first alignment electrode, and a second end of the light emitting elements may face the second alignment electrode. The display device may further include an auxiliary line that extends in the first direction in a non-display area surrounding the display area. The first auxiliary electrode and the second auxiliary electrode may be electrically connected to the auxiliary line. The display device may further include an alignment line that extends in the second direction between the pixels. The first alignment electrode and the second alignment electrode may be electrically connected to the alignment line. The first alignment electrode and the second alignment electrode may be alternately disposed in the second direction. The first auxiliary electrode and the second auxiliary electrode may be alternately disposed in the first direction. A distance between the first alignment electrode and the second alignment electrode may be less than a distance between the first auxiliary electrode and the second auxiliary electrode. The display device may further include an insulating layer disposed between the first auxiliary electrode and the second auxiliary electrode and the first alignment electrode and the second alignment electrode. The display device may further include connection electrodes disposed on the light emitting elements. According to an embodiment, a method of manufacturing a display device may include providing a first alignment electrode and a second alignment electrode that are spaced apart from each other in pixels provided in a display area, firstly aligning light emitting elements in a first alignment direction between the first alignment electrode and the second alignment electrode, providing a first auxiliary electrode and a second auxiliary electrode that extend across the pixels, secondly aligning the light emitting elements in a second alignment direction intersecting the first alignment direction between the first auxiliary electrode and the second auxiliary electrode, and thirdly aligning the light emitting elements in the first alignment direction so that a first end of the light emitting elements faces the first alignment electrode and a second end of the light emitting elements faces the second alignment electrode. The first alignment electrode and the second alignment electrode may extend in a first direction. The first alignment direction may be perpendicular to the first direction. The first auxiliary electrode and the second auxiliary electrode may extend in a second direction perpendicular to the first direction. The second direction may be perpendicular to the second alignment direction. The first auxiliary electrode and the second auxiliary electrode may extend in a second direction inclined with respect to the first direction. The second direction may be perpendicular to the second alignment direction. The method may further include forming an auxiliary line that extends in the first direction in a non-display area surrounding the display area and may be electrically connected to the first auxiliary electrode and the second auxiliary electrode. A distance between the first alignment electrode and the second alignment electrode may be less than a distance between the first auxiliary electrode and the second auxiliary electrode. The method may further include forming connection electrodes on the thirdly aligned light emitting elements. Details of other embodiments