KR-102965187-B1 - LIGHT EMITTING DISPLAY APPARATUS AND MULTI SCREEN DISPLAY APPARATUS USING THE SAME

KR102965187B1KR 102965187 B1KR102965187 B1KR 102965187B1KR-102965187-B1

Abstract

The present specification provides a light-emitting display device having a thin bezel width while preventing degradation of the reliability of the light-emitting element due to moisture permeability, and a multi-screen display device including the same. The light-emitting display device may include a plurality of pixels disposed in a display portion of a substrate, a common electrode electrically connected to each of the plurality of pixels, a pixel common voltage line electrically connected to the common electrode, a pad portion including a pixel common voltage pad connected to the pixel common voltage line, and at least one closed-loop line disposed in an edge portion of the substrate to surround the display portion. The at least one closed-loop line may be electrically connected to the pixel common voltage pad.

Inventors

장영인
김경민
김현동

Assignees

엘지디스플레이 주식회사

Dates

Publication Date: 20260513
Application Date: 20191231

Claims (20)

A substrate having a display portion; A plurality of pixels arranged in the above display unit; At least one cliff pattern portion disposed on the edge portion of the substrate; A light-emitting element layer comprising a pixel electrode disposed at each of the plurality of pixels, a self-luminous element disposed at the edge portion of the pixel electrode and the substrate, and a common electrode disposed on the self-luminous element; The common electrode disposed in the above-mentioned display unit and electrically connected to each of the plurality of pixels; A pixel common voltage line disposed in the above-mentioned display unit and electrically connected to the above-mentioned common electrode; A pad portion comprising a pixel common voltage pad disposed on one edge portion of the substrate and connected to the pixel common voltage line; and It includes at least one closed-loop line disposed at the edge portion of the substrate to surround the above-mentioned display portion, and The above at least one closed-loop line is electrically connected to the pixel common voltage pad, and The above at least one cliff pattern section and the above at least one closed loop line overlap each other, A light-emitting display device configured such that at least one cliff pattern portion is configured to disconnect the self-luminous element disposed on the edge portion of the substrate.
In Article 1, The above pad portion further includes a pad connection line electrically connected between the pixel common voltage pad and the pixel common voltage line, and A light-emitting display device wherein at least one closed-loop line is positioned to cross the pad connection line in the pad portion and is electrically connected to the pad connection line.
In Article 2, It further includes a conductive metal line disposed below at least one closed-loop line and electrically connected to the pad connection line, A light-emitting display device in which at least one closed-loop line is electrically connected to the pad connection line through the conductive metal line.
In Article 2, It further includes an intermediate insulating layer disposed between the above at least one closed-loop line and the pad connection line, The above intermediate insulating layer includes a via hole disposed at the intersection of the at least one closed-loop line and the pad connection line, and A light-emitting display device in which at least one closed-loop line is electrically connected to the pad connection line through the via hole.
In Article 4, A light-emitting display device further comprising a conductive metal line electrically connected between at least one closed-loop line and the pad connection line inside the via hole.
In Article 5, The above intermediate insulating layer includes a buffer layer disposed on the pad connection line and a passivation layer disposed on the buffer layer, and The above via hole includes a first via hole penetrating the buffer layer disposed on the pad connection line, and a second via hole penetrating the passivation layer disposed on the first via hole. The conductive metal line is disposed in the first via hole and is electrically connected to the pad connection line, and A light-emitting display device in which at least one closed-loop line is electrically connected to the conductive metal line through a second via hole.
In Article 1, One side of the pixel common voltage line is electrically connected to the pixel common voltage pad, and The other side of the above pixel common voltage line is positioned on the other edge of the substrate parallel to one edge of the substrate with the display portion in between, and A light-emitting display device in which at least one closed-loop line is electrically connected to the other side of the pixel common voltage line at the other edge portion of the substrate.
In Article 2, It further includes a dam pattern disposed on the edge portion of the substrate to surround the above-mentioned display portion, and The above at least one cliff pattern portion is disposed around the dam pattern, and The above at least one closed-loop line is a light-emitting display device disposed in the above at least one cliff pattern section.
In Article 8, A light-emitting display device in which each of the self-luminous element and the common electrode disposed at the edge portion of the substrate is separated by the at least one cliff pattern portion.
In Article 9, The above at least one cliff pattern part is, A tapered structure realized by patterning a passivation layer disposed around the dam pattern above; and It includes an eaves structure covering at least one closed-loop line disposed on the tapered structure, A light-emitting display device in which at least one closed-loop line penetrates the tapered structure and is electrically connected to the pad connection line.
In Article 10, It further includes a bank that defines the opening of each of the plurality of pixels and covers the at least one closed-loop line disposed on the tapered structure of the at least one cliff pattern portion, The above eaves structure is a light-emitting display device implemented with the same material as the above bank.
In Article 11, The above at least one cliff pattern portion includes an undercut structure disposed between the tapered structure and the bank, and A light-emitting display device in which at least one closed-loop line penetrates the tapered structure and is electrically connected to the pad connection line.
In Article 12, A buffer layer interposed between the above-mentioned tapered structure and the above-mentioned pad connection line; and It further includes via holes penetrating the passivation layer and the buffer layer of the tapered structure, A light-emitting display device in which at least one closed-loop line is electrically connected to the pad connection line through the via hole.
In Article 13, A light-emitting display device further comprising a conductive metal line interposed between at least one closed-loop line and the pad connection line inside the via hole.
In Article 14, The above via hole includes a first via hole penetrating the buffer layer disposed on the pad connection line, and a second via hole penetrating the passivation layer disposed on the first via hole. The conductive metal line is disposed in the first via hole and is electrically connected to the pad connection line, and A light-emitting display device in which at least one closed-loop line is electrically connected to the conductive metal line through a second via hole.
In Article 14, A light-emitting display device in which the conductive metal line has any one of the following forms: a dot form corresponding to the intersection of the at least one closed-loop line and the pad connection line, a dotted line form intersecting the pad connection line, and a closed-loop form identical to the at least one closed-loop line.
In Article 1, A rear substrate coupled to the above substrate; and A light-emitting display device further comprising a routing section having a routing line disposed on the outer surface of the substrate and the outer surface of the rear substrate and electrically connected to the pad section.
In Article 17, It further includes a driving circuit portion disposed on the rear substrate, and The pad portion disposed on the above substrate is a first pad portion, and The above rear substrate is, A second pad portion that overlaps with the first pad portion and is electrically connected to the routing line of the routing portion; and A light-emitting display device comprising a third pad portion electrically connected to the second pad portion and connected to the driving circuit portion.
In any one of paragraphs 1 through 18, A light-emitting display device in which the side of the display portion is aligned with the outer surface of the substrate or the size of the display portion is the same as the size of the substrate.
In Article 19, The outermost pixel among the plurality of pixels above includes the at least one closed-loop line and the pad portion, or A light-emitting display device wherein the plurality of pixels are arranged on the substrate to have a pixel pitch along a first direction and a second direction transverse to the first direction, and the distance between the center of the outermost pixel among the plurality of pixels and the outer surface of the substrate is less than or equal to half the pixel pitch.

Description

Light-emitting display apparatus and multi-screen display apparatus using the same This specification relates to a light-emitting display device and a multi-screen display device using the same. Emissive displays are self-emissive display devices that, unlike liquid crystal displays, do not require a separate light source, allowing them to be manufactured in lightweight and thin forms. Furthermore, emissive displays are gaining attention as next-generation display devices because they offer advantages in terms of power consumption due to low-voltage driving, as well as superior color reproduction, response speed, viewing angle, and contrast ratio. A light-emitting display device displays an image through the light emission of a light-emitting element layer comprising a light-emitting element interposed between two electrodes. At this time, light generated by the light emission of the light-emitting element is emitted to the outside through the electrodes and the substrate. The light-emitting display device includes a display panel implemented to display an image. The display panel may include a display area having a plurality of pixels for displaying an image, and a bezel area surrounding the display area. Conventional light-emitting display devices require a bezel (or structure) to cover the bezel area placed at the border (or edge portion) of the display panel, and the bezel width may increase due to the width of the bezel. Furthermore, if the bezel width of the light-emitting display device is reduced to an extreme degree, the reliability of the light-emitting element may be compromised due to degradation of the light-emitting element caused by moisture penetration. Recently, multi-screen display devices that realize a large screen by arranging light-emitting display devices in a grid pattern are being commercialized. However, conventional multi-screen display devices have boundary areas called seams between adjacent displays due to the bezel areas of each display device or the bezels. These boundary areas reduce immersion by creating a sense of discontinuity (or abruptness) when displaying a single image across the entire screen of the multi-screen device. FIG. 1 is a drawing showing a light-emitting display device according to an example of the present specification. Figure 2 is an enlarged view of the 'B1' portion shown in Figure 1. Figure 3 is an equivalent circuit diagram representing one subpixel shown in Figure 1. Figure 4 is a cross-sectional view of line I-I' shown in Figure 1. Figure 5 is an enlarged view of the 'B2' portion shown in Figure 4. Figure 6 is an enlarged view of the 'B3' portion shown in Figure 4. Figure 7 is an enlarged view of the 'B4' portion shown in Figure 4. Figure 8 is a cross-sectional view of line II-II' shown in Figure 1. FIGS. 9a to 9c are drawings showing various examples of conductive metal lines illustrated in FIGS. 7 and 8. FIG. 10 is a plan view showing a light-emitting display device according to another example of the present specification. FIG. 11 is a side view schematically illustrating a light-emitting display device according to another example of the present specification. FIG. 12 is a perspective view showing the light-emitting display device illustrated in FIG. 10. FIG. 13 is a drawing showing the rear side of the light-emitting display device illustrated in FIG. 10. Figure 14 is an enlarged view of the 'B5' portion shown in Figure 12. FIG. 15 is a circuit diagram showing a single pixel illustrated in FIG. 12 and FIG. 14. FIG. 16 is a drawing showing a gate driving circuit placed in the display area shown in FIG. 12 and FIG. 14. FIG. 17 is a cross-sectional view of line III-III' shown in FIG. 12. Figure 18 is an enlarged view of the 'B6' portion shown in Figure 17. FIG. 19 is a cross-sectional view of line IV-IV' shown in FIG. 12. FIG. 20 is a drawing showing a multi-screen display device according to an example of the present specification. Figure 21 is a cross-sectional view of the line V-V' shown in Figure 20. The advantages and features of this specification and the methods for achieving them will become clear by referring to the various examples described below in detail together with the accompanying drawings. However, this specification is not limited to the examples disclosed below but may be implemented in various different forms. The examples of this specification are provided merely to ensure that the disclosure of this specification is complete and to fully inform those skilled in the art of the scope of the technical concept to which this specification belongs, and the technical concept of this specification is defined only by the scope of the claims. Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for illustrating examples of this specification are exemplary and are not limited to the matters illustrated in this specification. Throughout the specification, the same reference numerals refer to the same components. Furthe