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JP-2026076201-A - display device

JP2026076201AJP 2026076201 AJP2026076201 AJP 2026076201AJP-2026076201-A

Abstract

[Problem] To provide a display device with reduced manufacturing process and manufacturing costs. [Solution] The display device includes a first substrate including a plurality of upper pads, a first substrate including a plurality of lower pads, and a plurality of side wirings connecting the plurality of upper pads and the plurality of lower pads. Each of the plurality of lower pads includes a first lower pad electrode located below the second substrate, a first insulating layer located below the first lower pad electrode, a second lower pad electrode located below the first insulating layer, a third lower pad electrode located below the second lower pad electrode, and a second insulating layer located below the third lower pad electrode. The third lower pad electrode is made of a transparent conductive material. Therefore, the manufacturing process and manufacturing cost of the display device can be reduced. [Selection Diagram] Figure 7b

Inventors

  • パク， ハンチュル
  • キム， ジニョン
  • チョイ， ウォンジュン

Assignees

  • エルジー ディスプレイ カンパニー リミテッド

Dates

Publication Date
20260511
Application Date
20260113
Priority Date
20240227

Claims (14)

  1. First substrate including multiple upper pads, A second substrate including a plurality of lower pads, and a plurality of side wirings connecting the plurality of upper pads and the plurality of lower pads, Each of the aforementioned lower pads is The first lower pad electrode is located at the bottom of the second substrate. A first insulating layer disposed below the first lower pad electrode, A second lower pad electrode positioned below the first insulating layer, It includes a third lower pad electrode positioned below the second lower pad electrode, and a second insulating layer positioned below the third lower pad electrode, The third lower pad electrode is a display device made of a transparent conductive material.
  2. The display device according to claim 1, wherein the third lower pad electrode and the second lower pad electrode are completely superimposed.
  3. The first insulating layer and the second insulating layer are inorganic insulating layers. The display device according to claim 1, wherein the second insulating layer leaves a portion of the third lower pad electrode open.
  4. The display device according to claim 3, wherein the third lower pad electrode is in contact with the plurality of side wirings.
  5. The aforementioned multiple lower pads are The second substrate includes a plurality of first lower pads arranged on the first edge of the second substrate, and a plurality of second lower pads arranged on the second edge of the second substrate, A high-potential power supply voltage is applied to the plurality of first lower pads. The display device according to claim 1, wherein a low potential power supply voltage is applied to the plurality of second lower pads.
  6. The plurality of upper pads include a plurality of first upper pads and a plurality of second upper pads, The aforementioned multiple side wirings are The display device according to claim 5, further comprising: a plurality of first side wirings connecting the plurality of first upper pads and the plurality of first lower pads; and a plurality of second side wirings connecting the plurality of second upper pads and the plurality of second lower pads.
  7. The second substrate further includes low-potential power supply wiring, high-potential power supply wiring, and a plurality of data wirings, The display device according to claim 1, wherein the plurality of data lines overlap with a portion of the high-potential power supply lines.
  8. The present invention further includes a plurality of flexible films disposed between the high-potential power wiring and the low-potential power wiring, and a plurality of auxiliary high-potential power wirings disposed above the high-potential power wiring and in contact with the high-potential power wiring, The display device according to claim 7, wherein each of the plurality of auxiliary high-potential power supply wirings is arranged alternately with each of the plurality of flexible films.
  9. The high-potential power supply wiring is made of the same material as the first lower pad electrode. The display device according to claim 8, wherein the plurality of auxiliary high-potential power supply wirings are made of the same material as the second lower pad electrode and the third lower pad electrode.
  10. The display device according to claim 8, wherein the width of each of the plurality of auxiliary high-potential power supply wirings increases as they are adjacent to the low-potential power supply wiring.
  11. The second substrate further includes a plurality of COF pads on which the flexible film is attached, The aforementioned multiple COF pads are The first COF pad electrode, the second COF pad electrode, and the third COF pad electrode are made of the same material as the first lower pad electrode, the second lower pad electrode, and the third lower pad electrode, respectively. The display device according to claim 8, wherein the second COF pad electrode and the third COF pad electrode are completely superimposed.
  12. The aforementioned multiple lower pads are The second substrate includes a plurality of first lower pads disposed on the first edge of the second substrate, and a plurality of second lower pads disposed on the second edge of the second substrate, The high-potential power supply wiring is arranged on the first edge of the second substrate and connected to the plurality of first lower pads. The display device according to claim 7, wherein the low-potential power supply wiring is arranged on the second edge of the second substrate and connected to the plurality of second lower pads.
  13. The width of the high-potential power supply wiring corresponds to the distance between the first lower pads located on the outermost edge of the plurality of first lower pads. The display device according to claim 12, wherein the width of the low-potential power supply wiring corresponds to the distance between the second lower pads located on the outermost edge of the plurality of second lower pads.
  14. The display device according to claim 13, wherein the low-potential power supply wiring is made of the same material as the first lower pad electrode, the second lower pad electrode, and the third lower pad electrode.

Description

This specification relates to a display device, and more particularly to a display device using an LED (Light Emitting Diode). Display devices used in computer monitors, TVs, mobile phones, etc., include organic light-emitting displays (OLEDs) that emit light themselves, and liquid crystal displays (LCDs) that require a separate light source. Display devices are no longer limited to computer monitors and TVs; their applications extend to personal portable devices, and research is progressing on display devices that offer a large display area while reducing volume and weight. Furthermore, in recent years, display devices including LEDs (Light Emitting Diodes) have been attracting attention as next-generation display devices. Because LEDs are made of inorganic materials rather than organic materials, they offer superior reliability and a longer lifespan compared to liquid crystal displays and organic light-emitting displays. In addition, LEDs not only have a fast illumination speed, but also excellent luminous efficiency, high impact resistance, and superior stability, enabling the display of high-brightness images. This is a schematic diagram of a display device according to one embodiment of this specification.This is a partial cross-sectional view of a display device according to one embodiment of this specification.This is a perspective view of a tiling display device according to one embodiment of this specification.This is an enlarged plan view of the first substrate of a display device according to one embodiment of this specification.This is an enlarged plan view of the second substrate of a display device according to one embodiment of this specification.This is a cross-sectional view of a subpixel of a display device according to one embodiment of this specification.This is a cross-sectional view of the pad area of a display device according to one embodiment of this specification.This is a cross-sectional view of the upper pad of a display device according to one embodiment of this specification.This is a cross-sectional view of the lower pad of a display device according to one embodiment of this specification.This is a cross-sectional view of the second substrate along line A-A' in Figure 4.This is a cross-sectional view of the second substrate along line B-B' in Figure 4. The advantages and features of this specification, and the methods for achieving them, will become clear upon reference to the examples described below in detail with the accompanying drawings. However, this specification is not limited to the examples disclosed below, but can be embodied in a variety of different forms, and these examples are provided merely to ensure the completeness of the disclosure and to fully inform those with ordinary skill in the art to which this specification belongs of the scope of the specification. The shapes, areas, proportions, angles, numbers, etc. disclosed in the drawings illustrating the embodiments of this specification are illustrative and not limited to those illustrated. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing this specification, if a detailed explanation of related prior art is deemed likely to unnecessarily obscure the gist of this specification, such detailed explanation is omitted. Where "includes," "has," "is made," etc., are used in this specification, other parts may be added unless "only" is used. When a component is expressed singularly, it includes cases where it includes multiple components unless otherwise explicitly stated. When interpreting the constituent elements, they shall be interpreted as including a margin of error, even if not explicitly stated otherwise. When describing spatial relationships, for example, when describing the relationship between two parts using phrases like "on top of," "above," "below," or "next to," it is permissible for one or more other parts to be located between the two parts, as long as "immediately" or "directly" is not used. When an element or layer is referred to as "on" another element or layer, this includes cases where another layer or other element is interposed immediately above or between the other element. Furthermore, while terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are simply used to distinguish one component from others. Therefore, the first component referred to below may also be the second component within the technical concept of this specification. Throughout the specification, the same reference numeral refers to the same component. The area and thickness of each component shown in the drawings are provided for illustrative purposes only, and this specification is not necessarily limited to the area and thickness of the components shown. The features of the various embodiments described herein are partially or entirely combinable with one another, enabli