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JP-7855131-B1 - Light-emitting diode display device

JP7855131B1JP 7855131 B1JP7855131 B1JP 7855131B1JP-7855131-B1

Abstract

[Problem] To provide a light-emitting diode display device with improved luminous efficiency and lifespan. [Solution] The present invention provides a light-emitting diode display device comprising: a substrate on which pixels including light-emitting regions and non-light-emitting regions are defined; a first insulating layer located on the upper part of the substrate; a step compensation pattern located on the first insulating layer and corresponding to the light-emitting region; a second insulating layer covering the step compensation pattern; a first electrode located on the second insulating layer and corresponding to the step compensation pattern; and a pixel defining film located on the second insulating layer in the non-light-emitting region, covering the edge of the first electrode and having an opening corresponding to the center of the first electrode, wherein the step compensation pattern has the same shape as the opening. [Selection Diagram] Figure 6

Inventors

  • クァク， ドフン
  • リー， ソンジン

Assignees

  • エルジー ディスプレイ カンパニー リミテッド

Dates

Publication Date
20260507
Application Date
20251114
Priority Date
20241223

Claims (14)

  1. A substrate on which pixels including light-emitting and non-light-emitting regions are defined, A first insulating layer located on the substrate, A step compensation pattern located on the first insulating layer and corresponding to the light-emitting region, A second insulating layer covering the step compensation pattern, A first electrode located on the second insulating layer and corresponding to the step compensation pattern, The second insulating layer includes a pixel defining film located in the non-emitting region, covering the edge of the first electrode, and having an opening corresponding to the center of the first electrode, The step compensation pattern has the same shape as the opening, in a light-emitting diode display device.
  2. The area of the step compensation pattern is larger than the area of the opening and smaller than the area of the first electrode, as described in claim 1.
  3. The light-emitting diode display device according to claim 1, wherein the step compensation pattern is island-shaped.
  4. A light-emitting layer located at the opening on the first electrode, The light-emitting diode display device according to claim 1, further comprising the pixel definition film and a second electrode covering the light-emitting layer within the opening.
  5. The light-emitting diode display device according to claim 4, wherein the step compensation pattern includes an extended portion, the extended portion extends from at least one end of the step compensation pattern to the lower part of the pixel definition film, and protrudes from the first electrode.
  6. The second electrode is electrically connected to the extended portion of the step compensation pattern, as described in claim 5.
  7. The pixel definition film and the second insulating layer have contact holes formed in them that correspond to the stretched portion of the step compensation pattern. The light-emitting diode display device according to claim 5, wherein the second electrode is connected to the extended portion of the step compensation pattern via the contact hole.
  8. The light-emitting diode display device according to claim 1, wherein the step compensation pattern further includes an extended wiring portion extending along a first direction.
  9. A third insulating layer located between the substrate and the first insulating layer, The present invention further includes a first signal wiring located on the third insulating layer and extending along the first direction, The light-emitting diode display device according to claim 8, wherein the extended wiring portion and the first signal wiring are spaced apart from each other in a second direction that intersects with the first direction.
  10. The system further includes a second signal wiring located on the third insulating layer and extending along the first direction, The extended wiring portion and the second signal wiring are spaced apart from each other in the second direction. The light-emitting diode display device according to claim 9, wherein the extended wiring portion is located between the first signal wiring and the second signal wiring.
  11. The light-emitting diode display device according to claim 9, wherein the thickness of the step compensation pattern is greater than the thickness of the first signal wiring.
  12. In a second direction perpendicular to the first direction, the step compensation pattern has a first width, and the extended wiring portion has a second width smaller than the first width, as described in claim 8.
  13. The first electrode has a single-layer structure of a transparent conductive oxide layer, and the step compensation pattern is used as a reflective layer for light transmitted through the first electrode, as described in claim 1.
  14. A light-emitting layer located at the opening on the first electrode, The pixel definition film and the second electrode covering the light-emitting layer within the opening, The light-emitting diode display device according to claim 13, further comprising a color filter layer located above the second electrode.

Description

This invention relates to a light-emitting diode (LED) display device, and more particularly, to a light-emitting diode (LED) display device with improved luminous efficiency and lifespan. With the increasing size of display devices, there is a growing demand for flat-panel displays that occupy less space. One type of flat-panel display element, the Light Emitting Display Device (LED), has been developed and is being adopted in a variety of fields. Light-emitting diode (LED) display devices can be classified into organic LED display devices and inorganic LED display devices. For example, in an organic light-emitting diode (OLED) display device, holes from the anode and electrons from the cathode combine in the organic light-emitting layer to form excitons, resulting in an unstable excited state. Light is emitted when the OLED returns from this state to the stable ground state. This is a schematic diagram showing a light-emitting diode display device according to the present invention.This is a schematic circuit diagram showing the light-emitting diode display device according to the present invention.This is a schematic plan view showing a light-emitting diode display device according to a first embodiment of the present invention.This is a schematic cross-sectional view showing a light-emitting diode display device according to a first embodiment of the present invention.This is a schematic plan view showing a light-emitting diode display device according to a second embodiment of the present invention.This is a schematic cross-sectional view showing a light-emitting diode display device according to a second embodiment of the present invention.This is a schematic cross-sectional view showing a light-emitting diode display device according to a third embodiment of the present invention.This is a schematic plan view showing a light-emitting diode display device according to a fourth embodiment of the present invention.This is a schematic cross-sectional view showing a light-emitting diode display device according to a fourth embodiment of the present invention. The terminology used in the embodiments of this invention has been selected, as far as possible, to be common and widely used today; however, it may differ depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. Where the applicant has arbitrarily selected specific terms, their meanings will be detailed. Therefore, terms used herein should be defined based on their meaning and the overall content of this disclosure. Throughout the specification, where a part is described as "including" or "comprising" a certain component, unless otherwise specified, this does not exclude other components, but rather may include other components. Throughout the specification, the expression "at least one of a, b, and c" may encompass "a alone," "b alone," "c alone," "a and b," "a and c," "b and c," or "all of a, b, and c." The advantages and features of the present invention, and how they are achieved, will become clearer with reference to the embodiments detailed with the drawings. The shapes, areas, ratios, angles, and quantities disclosed in the drawings illustrating embodiments of the present invention are illustrative examples only, and the present invention is not limited thereto. When describing embodiments, if a detailed explanation of related prior art is deemed to obscure the essence of the embodiments, such detailed explanation will be omitted. In this specification, if words such as "equip," "include," "have," "possess," or "become" are used, other parts may be added. Furthermore, if a component is described in the singular form, it may be interpreted as plural unless otherwise explicitly stated. In interpreting components, a margin of error is included even without explicit indication. For example, when describing the positional relationship between two components using terms such as "above," "above," "below," or "beside," one or more other components may be located between those two components. When an element or layer is described as "on" another element or layer, this includes all cases where another layer or other element is directly above or between it and the other element. Furthermore, while terms such as "first" and "second" are used to distinguish the components, the components are not limited to these terms. Therefore, the first component mentioned below may also be the second component within the technical concept of this invention. The area, length, and thickness of each component described in the specification are illustrated for illustrative purposes only and do not necessarily limit the present invention to them. The features of each of the multiple embodiments of the present invention can be combined or integrated partially or entirely, enabling a wide range of technically diverse interconnections and drives. Furthermore, each embodiment can be implemented independently or in conjunction with