CN-122028566-A - Light emitting diode and light emitting element display device

Abstract

Disclosed are a light emitting diode and a light emitting element display device, the light emitting diode including a semiconductor layer, a first element electrode on the semiconductor layer, a second element electrode on the semiconductor layer, a first auxiliary electrode connected to the first element electrode and located at one side of the light emitting diode, a first protection layer on the first element electrode and the second element electrode, and a second protection layer on the first auxiliary electrode and the first protection layer.

Inventors

• LI SHOUMIN
• LI BINGXUAN
• XU DARONG
• JIN TAIYONG
• ZHANG YONGREN

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260512

Application Date

20250902

Priority Date

20241111

Claims (20)

1. 1. A light emitting diode, comprising: A semiconductor layer; A first element electrode is provided which, the first element electrode is positioned on the semiconductor layer; The electrode of the second element is arranged on the surface of the first element, the second element electrode is positioned on the semiconductor layer; A first auxiliary electrode connected to the first element electrode and located at one side of the light emitting diode; a first protective layer on the first element electrode and the second element electrode, and And the second protective layer is positioned on the first auxiliary electrode and the first protective layer.
2. 2. The light emitting diode of claim 1, wherein the second element electrode is located higher than the first element electrode.
3. 3. The light emitting diode of claim 1, wherein the first protective layer exposes the first and second element electrodes, and Wherein the first protective layer extends from the top surface of the first element electrode to the side surface of the semiconductor layer.
4. 4. The light emitting diode of claim 1, wherein the second protective layer is in contact with the first auxiliary electrode and exposes the first auxiliary electrode at the one side of the light emitting diode.
5. 5. The light-emitting diode of claim 1, wherein the first auxiliary electrode is in contact with a top surface of the first element electrode and extends from the top surface of the first element electrode to the one side surface of the light-emitting diode, and Wherein the first auxiliary electrode covers the first protective layer located at the one side of the light emitting diode.
6. 6. The light emitting diode of claim 1, further comprising a second auxiliary electrode located on another side of the light emitting diode, and the other side is spaced apart from the one side.
7. 7. The light emitting diode of claim 6, wherein the second auxiliary electrode is in contact with a top surface of the second element electrode and extends from the second element electrode to the other side surface of the light emitting diode, and Wherein the second auxiliary electrode covers the first protective layer located at the other side of the light emitting diode, and the second protective layer exposes the second auxiliary electrode located at the other side of the light emitting element.
8. 8. The light emitting diode of claim 6, wherein the first auxiliary electrode has a first region exposed through the second protective layer, the second auxiliary electrode has a second region exposed through the second protective layer, and the second region is higher than the first region.
9. 9. The light-emitting diode of claim 1, wherein the first protective layer extends from a top surface of the first element electrode to a side surface of the semiconductor layer, and Wherein the second protective layer exposes the first auxiliary electrode at the side of the semiconductor layer.
10. 10. A light emitting element display device comprising: A substrate; a light emitting element disposed over the substrate, the light emitting element including a first element electrode, a second element electrode, and an auxiliary electrode, the first element electrode and the second element electrode being spaced apart from each other, and the auxiliary electrode being located on at least one side of the light emitting element; a first electrode connected to the first element electrode, and A second electrode located above the first electrode and connected to the second element electrode, Wherein at least one of the first electrode and the second electrode is connected to at least one of the first element electrode and the second electrode through the auxiliary electrode.
11. 11. The light-emitting element display device according to claim 10, further comprising: a thin film transistor disposed over the substrate, and And a reflective electrode disposed over the thin film transistor, and connected to the thin film transistor and the first electrode.
12. 12. The light-emitting element display device according to claim 11, further comprising: A power line disposed over the substrate and spaced apart from the thin film transistor, Wherein, the power line and the source electrode and the drain electrode of the thin film transistor are positioned on the same layer.
13. 13. The light-emitting element display device according to claim 12, further comprising: And a first connection electrode disposed over the thin film transistor and the power line, wherein the first connection electrode is connected to the power line.
14. 14. The light-emitting element display device according to claim 13, further comprising: A second connection electrode positioned above and in contact with the first connection electrode, Wherein the second electrode is connected with the second connection electrode.
15. 15. The light-emitting element display device according to claim 14, further comprising: An adhesive layer disposed over the reflective electrode; a second planarization layer on which the first electrode is disposed, and A third planarization layer covering the first electrode, Wherein the second electrode is located on the third planarization layer, and Wherein the second electrode is in contact with the second connection electrode through a contact hole provided in the third planarization layer.
16. 16. The light-emitting element display device according to claim 11, further comprising: A first capacitor electrode, and A second capacitor electrode located above the first capacitor electrode, Wherein the second capacitor electrode is electrically connected to the thin film transistor.
17. 17. The light-emitting element display device according to claim 10, wherein the first electrode is in contact with a first auxiliary electrode of the auxiliary electrode on a side of the light-emitting element, and Wherein the second electrode is in contact with a second auxiliary electrode of the auxiliary electrode on the other side of the light emitting element.
18. 18. The light-emitting element display device according to claim 17, wherein the second auxiliary electrode is in contact with a top surface of the second element electrode and extends from the second element electrode to the other side of the light-emitting element, and Wherein the second auxiliary electrode covers a first protective layer located at the other side of the light emitting element, and a second protective layer exposes the second auxiliary electrode located at the other side of the light emitting element.
19. 19. The light-emitting element display device according to claim 13, wherein the first connection electrode and the reflective electrode are located in the same layer and formed of the same material.
20. 20. The light-emitting element display device according to claim 15, wherein the first element electrode is located above the second planarizing layer.

Description

Light emitting diode and light emitting element display device Cross Reference to Related Applications The present application claims priority from korean patent application No. 10-2024-0159161, filed 11/2024 to korea, on 11/2024, the entire contents of which are expressly incorporated herein by reference. Technical Field The present disclosure relates to a display device, and more particularly, to a light emitting element display device. Background With the advancement of information society, demands for different types of display devices are increasing, and flat panel display devices (FPDs) such as liquid crystal display devices and light emitting diode display devices have been developed and applied to various fields. Among the flat panel display devices, the light emitting diode display device emits light due to radiative recombination of excitons. An exciton is formed from an electron and a hole by injecting charge into a light emitting layer between a cathode for injecting electrons and an anode for injecting holes in a light emitting diode. The light emitting diode display device may provide various advantages and improved characteristics. For example, the light emitting diode display device has a wide viewing angle because the light emitting diode display device is self-luminous as compared to the liquid crystal display device, and has an ultra-thin thickness and a light weight because the light emitting diode display device does not require a backlight unit. In addition, the light emitting diode display device is also advantageous in terms of power consumption. The light emitting diode display device may include an inorganic-based light emitting element and an organic-based light emitting element. The inorganic-based light emitting element has relatively excellent stability, rapid response characteristics, and high contrast, and a micro light emitting diode (micro LED or uLED) is widely used as the inorganic-based light emitting element of high resolution. The inorganic-based light emitting element is formed on an element substrate and transferred to an array substrate of the display device. Next, a signal electrode for transmitting a signal is formed on the array substrate of the display device. However, since the size of the light emitting element is relatively very small, the distance between the signal electrodes is very short, so that an electrical short circuit may occur between the electrodes of the light emitting element. Disclosure of Invention Accordingly, embodiments of the present disclosure are directed to a light emitting diode display device that substantially obviates one or more problems due to limitations and disadvantages of the related art. An aspect of the present disclosure is to provide a light emitting diode display device capable of preventing an electrical short between electrodes of a light emitting diode. Additional features and aspects will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts provided herein. Other features and aspects of the inventive concept may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. To achieve these and other aspects of the inventive concept, as embodied and broadly described herein, a light emitting diode includes a semiconductor layer, a first element electrode on the semiconductor layer, a second element electrode on the semiconductor layer, a first auxiliary electrode connected to the first element electrode and located at one side of the light emitting diode, a first protection layer on the first element electrode and the second element electrode, and a second protection layer on the first auxiliary electrode and the first protection layer. Further, a light emitting element display device includes a substrate, a light emitting element disposed over the substrate, the light emitting element including a first element electrode, a second element electrode, and an auxiliary electrode, the first element electrode and the second element electrode being spaced apart from each other, and the auxiliary electrode being located at least one side of the light emitting element, a first electrode connected to the first element electrode, and a second electrode located over the first electrode and connected to the second element electrode, wherein at least one of the first electrode and the second electrode is connected to at least one of the first element electrode and the second electrode through the auxiliary electrode. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed. Drawings The accompanying drawings, which are included to provide a further understanding of the disclosure and are i