Light-emitting display device

Abstract

A light emitting display device is disclosed. The light emitting display device includes: a substrate including a plurality of sub-pixels; a first electrode at each of the plurality of sub-pixels; a bank portion exposing the first electrode at each light emitting portion of the plurality of sub-pixels; a first spacer structure on the bank; a second spacer structure spaced apart from the first spacer structure on the bank; a common layer on the first electrode, the bank, the first spacer structure, and the second spacer structure; and a second electrode on the common layer, in which the second electrode is disposed on at least one side surface of the common layer over the first spacer structure and at least one side of the first spacer structure, the first spacer structure including a pattern surrounding each of the sub-pixels, and the pattern including at least one opening region therein, the first spacer structure further includes an extension to connect a pattern surrounding adjacent sub-pixels between adjacent sub-pixels, and the second spacer structure is adjacent to the at least one opening region.

Description

[0001] This application is a divisional application of patent application No. 202110692440.8, filed on June 22, 2021, entitled "Light Emitting Display Device".

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0078445, filed on June 26, 2020, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] The present invention relates to a light-emitting display device, and more specifically, to a light-emitting display device that can prevent lateral leakage current between adjacent sub-pixels by utilizing a structure provided on the embankment. Background Technology

[0004] Recently, display devices have evolved into various types to meet requirements such as flexibility, miniaturization, and maximization.

[0005] Among these display devices, light-emitting devices that include light-emitting devices and thereby eliminate the need for external light sources to achieve a thin display are considered competitive applications. These light-emitting devices are respectively disposed in multiple pixels or sub-pixels disposed on a substrate.

[0006] The light-emitting display device includes multiple layers in each light-emitting element, and in this case, in order to avoid the use of fine metal masks, the light-emitting display device has a common layer that is formed in each pixel or sub-pixel.

[0007] Because of a common layer shared within a pixel or sub-pixel, current can flow through this two-dimensionally extended common layer to adjacent pixels or sub-pixels. Such current is called lateral leakage current. Summary of the Invention

[0008] Therefore, the present invention relates to a light-emitting display device that can use a structure disposed on a dam to prevent lateral leakage current.

[0009] The object of the present invention is to provide a light-emitting display device that can be defined to divide a common layer into regions corresponding to sub-pixels using a structure disposed on a dam without using a separate mask, thereby preventing lateral leakage current between adjacent sub-pixels.

[0010] Other advantages, objects, and features of the invention will be set forth in part in the description which follows, and will become apparent to those skilled in the art upon reading the following, or may be learned from practice of the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures particularly pointed out in the written description, its claims, and the accompanying drawings.

[0011] To achieve these and other advantages, and according to the purposes of the invention, as specifically embodied and broadly described herein, a light-emitting display device includes: a substrate comprising a plurality of first to third sub-pixels arranged adjacent to each other, each of the first to third sub-pixels including a light-emitting portion and a non-light-emitting portion configured to surround the light-emitting portion; a first electrode covered by a dam and disposed in the first to third sub-pixels respectively to expose the respective light-emitting portion; a first spacer structure having an inverted conical shape on the dam and configured to surround at least one side of the light-emitting portion of each of the first to third sub-pixels; a common layer structure located on the first electrode and the first spacer structure and interrupted at the edge of the first spacer structure; and a second electrode located on the common layer structure.

[0012] In another aspect of the invention, a light-emitting display device includes: a substrate comprising a plurality of light-emitting portions and non-light-emitting portions between the light-emitting portions; first electrodes respectively disposed in the light-emitting portions; a dam portion configured to selectively overlap with the first electrodes and disposed in the non-light-emitting portions; a first spacer structure having an inverted conical shape on the dam portion between adjacent light-emitting portions, the first spacer structure being configured to have an opening region formed in a virtual closed loop, the virtual closed loop being configured to surround at least one of the light-emitting portions and at least one side of each of the light-emitting portions; a common layer structure located on the first electrodes and the first spacer structure and broken at the edge of the first spacer structure; and a second electrode located on the common layer structure.

[0013] In another aspect of the invention, a light-emitting display device includes: a substrate comprising a plurality of sub-pixels; a first electrode at each of the plurality of sub-pixels; a dam exposing the first electrode at each light-emitting portion of the plurality of sub-pixels; a first spacer structure on the dam; a second spacer structure spaced apart from the first spacer structure on the dam; a common layer on the first electrode, the dam, the first spacer structure, and the second spacer structure; and a second electrode on the common layer, wherein the second electrode is disposed on at least one side surface of the common layer above the first spacer structure and at least one side portion of the first spacer structure, wherein the first spacer structure includes a pattern surrounding each of the plurality of sub-pixels, and the pattern includes at least one opening region, wherein the first spacer structure further includes an extension to connect the pattern surrounding adjacent sub-pixels between adjacent sub-pixels, and wherein the second spacer structure is adjacent to the at least one opening region.

[0014] It should be understood that the foregoing general description and the following detailed description of the invention are exemplary and illustrative, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0015] The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings:

[0016] Figure 1 This is a plan view showing a light-emitting display device according to a first embodiment of the present invention;

[0017] Figure 2 It is along Figure 1 A cross-sectional view taken from line I-I';

[0018] Figure 3 It is along Figure 1 A cross-sectional view taken from line II-II';

[0019] Figure 4 It is along Figure 1 A cross-sectional view taken from line III-III';

[0020] Figure 5 This is a plan view showing a light-emitting display device according to a second embodiment of the present invention;

[0021] Figure 6 This is a plan view showing a light-emitting display device according to a third embodiment of the present invention;

[0022] Figure 7 This is a plan view showing a light-emitting display device according to a fourth embodiment of the present invention;

[0023] Figure 8 This is a plan view showing a light-emitting display device according to a fifth embodiment of the present invention;

[0024] Figures 9A to 9E This is a plan view showing a light-emitting display device according to the sixth to tenth embodiments of the present invention;

[0025] Figures 10A to 10H This is a plan view showing a light-emitting display device according to embodiments eleven to eighteen of the present invention;

[0026] Figure 11 This is a plan view showing a light-emitting display device according to the nineteenth embodiment of the present invention;

[0027] Figure 12A and Figure 12BThis refers to the optical images of the light-emitting display device according to the first embodiment of the present invention and the light-emitting display device according to Example 1 when emitting blue light at a low gray level; and

[0028] Figure 13 It is a SEM image of a first spacer structure having an inverted conical shape after the formation of the first encapsulation layer and the surrounding elements in a light-emitting display device according to the present invention. Detailed Implementation

[0029] Exemplary embodiments of the invention will now be described in detail, examples of which are illustrated in the accompanying drawings. Throughout the description of the embodiments and drawings, the same or similar elements are designated by the same reference numerals. In the following description of embodiments of the invention, detailed descriptions of known functions and configurations incorporated herein will be omitted where such descriptions might obscure the subject matter. Furthermore, the names of elements used in the following description of embodiments of the invention have been chosen for ease of preparation of the specification and may therefore differ from the names of components in an actual product.

[0030] The shapes, dimensions, ratios, angles, and quantities of elements shown in the accompanying drawings to describe embodiments of the invention are merely exemplary, and therefore, the invention is not limited to the details shown. In the following description of embodiments, the terms "comprising," "including," and "having" should be interpreted as indicating the presence of one or more other features, numbers, steps, operations, elements, or components or combinations thereof stated in the specification, and unless the term "only" is used, the possibility of the presence or addition of other features, numbers, steps, operations, elements, components, or combinations thereof is not excluded. It will be understood that, unless otherwise stated, singular expressions of elements include plural expressions.

[0031] In interpreting elements included in the various embodiments of the invention, it should be understood that, unless otherwise stated, elements include tolerance ranges.

[0032] In the following description of the implementation, it will be understood that when expressing positional relationships, for example, when an element is referred to as “on,” “above,” “below,” or “next to” another element, the two elements may be in direct contact with each other, or one or more other elements may be inserted between the two elements, unless the terms “only” or “directly” are used.

[0033] In the following description of the embodiments, it will be understood that when the terms "first," "second," etc., are used to describe various elements, these terms are only used to distinguish the same or similar elements. Therefore, without departing from the technical scope of the invention, the first element described below may be referred to as the second element.

[0034] The various features of the various embodiments of the present invention may be coupled or combined with each other in part or in whole, and may be associated or driven in various technical ways, and the various embodiments may be implemented independently of each other or together through the connection between them.

[0035] Figure 1 This is a plan view showing a light-emitting display device according to a first embodiment of the present invention. Figure 2 It is along Figure 1 A cross-sectional view taken from line I-I'. Figure 3 It is along Figure 1 The cross-sectional view taken from line II-II', and Figure 4 It is along Figure 1 The cross-sectional view taken from line III-III'.

[0036] like Figures 1 to 4 As shown, a light-emitting display device according to a first embodiment of the present invention includes: a substrate 100, the substrate 100 including a plurality of first sub-pixels to third sub-pixels SP1, SP2 and SP3 arranged adjacent to each other, each of the first sub-pixels to third sub-pixels SP1, SP2 and SP3 including a light-emitting portion B, R or G and a non-light-emitting portion NE configured to surround the light-emitting portion B, R or G; a dam portion 150 disposed in the non-light-emitting portion NE; first electrodes 110a, 110b and 110c, the first electrodes 110a, 110b and 110c being covered by the dam portion 150 and respectively disposed in the first sub-pixels to third sub-pixels SP1, SP2 and SP3 to expose the corresponding light-emitting portions B, R and G; and first spacer structures 160a, 160b and 160c having an inverted conical shape on the dam portion 150 configured to surround at least one side of a corresponding light-emitting portion of the light-emitting portions B, R and G of the first sub-pixels to third sub-pixels SP1, SP2 and SP3.

[0037] Furthermore, in the light-emitting display device according to the present invention, a light-emitting device is provided in each sub-pixel SP1, SP2, and SP3. Each light-emitting device includes a first electrode 110a, 110b, or 110c, a second electrode 180 disposed opposite to the first electrode 110a, 110b, or 110c, and organic stacked portions 121, 122a, 122b, and 123 filling the space between the first electrode 110a, 110b, or 110c and the second electrode 180. A light-emitting device including a light-emitting layer 122a or 122b formed of an organic light-emitting material can be called an organic light-emitting device; a light-emitting device including a light-emitting layer 122a or 122b formed of a quantum dot material can be called a quantum dot light-emitting device; and a light-emitting device including a light-emitting layer 122a or 122b formed of a mixture of organic and inorganic materials can be called a hybrid light-emitting device. However, the light-emitting device of the light-emitting display device according to the present invention is not limited in terms of its materials. The light-emitting display device according to the present invention includes one or more common layers 121 and 123 having a common layer structure. The common layers 121 and 123 can be formed without a fine metal mask and can be applied to self-emitting devices with various structures, as long as the first spacer structures 160: 160a, 160b and 160c can divide the common layers 121 and 123 into regions to prevent or limit lateral leakage current between adjacent sub-pixels.

[0038] The first common layer 121 and the second common layer 123 may be formed along the upper surfaces of the first spacer structures 160: 160a, 160b and 160c, as well as the upper surfaces of the first electrodes 110a, 110b and 110c exposed outside the first spacer structures 160: 160a, 160b and 160c and the upper and side surfaces of the embankment 150.

[0039] Furthermore, the second electrode 180 can be formed on the second common layer 123. The second electrode 180, which includes a metallic material, has a relatively good step coverage, and therefore can be formed not only on the upper part of the second common layer 123, but also on the side part of the second common layer 123.

[0040] Figure 1 An arrangement of sub-pixels SP1, SP2, and SP3 of a light-emitting display device according to a first embodiment of the present invention is shown. In this arrangement, the first sub-pixel SP1 and the second sub-pixel SP2 can be arranged alternately in rows and columns, and the third sub-pixel SP3 can be arranged to alternate diagonally with each of the first sub-pixels SP1 and the second sub-pixels SP2. More specifically, see [reference needed]. Figure 1The first sub-pixel SP1 and the third sub-pixel SP3 are alternately arranged on the first diagonal from the top left to the bottom right, and the second sub-pixel SP2 and the third sub-pixel SP3 are alternately arranged on the second diagonal parallel to the first diagonal. A group of one first sub-pixel SP1, one second sub-pixel SP2, and two third sub-pixels SP3 in the diamond-shaped area forms a pixel.

[0041] The first spacer structure 160 corresponding to at least one of the first to third sub-pixels SP1, SP2, and SP3 may have an opening region 1600A, 1600B, or 1600C formed in a virtual closed loop configured to surround the light-emitting portion of at least one of the first to third sub-pixels SP1, SP2, and SP3. Although Figure 1 The first spacer structure 160 corresponding to all the first to third sub-pixels SP1, SP2 and SP3 is shown as having an opening region 1600A, 1600B or 1600C adjacent to the corresponding light-emitting parts B, R and G. However, this disclosure is not limited to this, and the first spacer structure 160 corresponding to one of the first to third sub-pixels SP1, SP2 and SP3 may have an opening region, or the first spacer structure 160 corresponding to two of the first to third sub-pixels SP1, SP2 and SP3 may have an opening region.

[0042] The invention is characterized in that the first spacer structures 160: 160a, 160b, and 160c, having an inverted conical shape, are located on the embankment 150 between adjacent sub-pixels SP1, SP2, and SP3, such that at least one of the common layers 121 and 123 deposited after the formation of the first spacer structures 160: 160a, 160b, and 160c can be disconnected at the sidewall of the first spacer structures 160: 160a, 160b, and 160c. Thus, even if the common layer has high conductivity, leakage current flowing through the common layer to adjacent sub-pixels can be prevented. In particular, due to the provision of the first spacer structures 160: 160a, 160b, and 160c, when forming the common layers 121 and 123, separate deposition masks configured to divide the common layers 121 and 123 into regions corresponding to sub-pixels SP1, SP2, and SP3 are not required. Because, as seen in its cross-section, the width of the upper side of the first spacer structure 160 is greater than the width of the lower side of the first spacer structure 160, the organic matter forming the common layers 121 and 123 does not accumulate on the area of ​​the embankment 150 below the upper side of the first spacer structure 160. Therefore, the common layers 121 and 123 can be structurally divided into a region corresponding to the first spacer structure 160 and a boundary region corresponding to the surrounding portion of the first spacer structure 160. That is, even if the space corresponding to the difference between the length of the upper side and the length of the lower side of the first spacer structure 160 is exposed relative to the embankment 150, the common layers 121 and 123 are not formed in that space because the upper side of the first spacer structure 160 acts as a screen. The common layer structure including the common layers 121 and 123 is formed by supplying vaporized organic material from a supply source disposed above the substrate 100 to the upper surface of the substrate 100. Because the vaporized organic material with straightness is deposited, the common layers 121 and 123 are effectively formed on the upper surface of the first spacer structure 160 or on the upper surface of the first electrode 110a or 110b located outside the first spacer structure 160 or on the upper surface of the embankment 150. However, it is difficult to form them uniformly and continuously on the area of ​​the embankment 150 covered by the upper surface of the first spacer structure 160. Therefore, the common layers 121 and 123 are structurally separated by the first spacer structure 160.

[0043] like Figure 1As shown, in the light-emitting display device according to a first embodiment of the present invention, the first spacer structure 160 includes: a first pattern 160b configured to surround the light-emitting portion B of the first sub-pixel SP1; a second pattern 160a configured to surround the light-emitting portion R of the second sub-pixel SP2; and a third pattern 160c configured to surround the light-emitting portion G of the third sub-pixel SP3. The first to third patterns 160b, 160a and 160c may have opening regions 1600A, 1600B and 1600C in a virtual closed loop shape configured to surround the light-emitting portions B, R and G of the first to third sub-pixels SP1, SP2 and SP3.

[0044] The first pattern 160b disposed around the light-emitting portion B of the first sub-pixel SP1 exhibits the following effect. To drive the first sub-pixel SP1, it is turned on by applying a voltage equal to or higher than the threshold voltage Vth of the first sub-pixel SP1, and in this case, as... Figures 2 to 4 As shown, common layers 121 and 123 are disconnected at the edge of the first pattern 160b. Therefore, there is little or no horizontal current leakage from the first sub-pixel SP1 to the adjacent sub-pixel, and the second and third sub-pixels SP3, which have low threshold voltages, are not turned on by the leakage current. The second pattern 160a structurally separates the first common layer 121 and the second common layer 123, and thus prevents the second sub-pixel SP2, which has a lower threshold voltage than the first and third sub-pixels SP1 and SP3, from being affected by the conduction of the adjacent first and third sub-pixels SP1 and SP3. The third pattern 160c structurally separates the first common layer 121 and the second common layer 123, and thus prevents the third sub-pixel SP3, which has a lower threshold voltage than the first sub-pixel SP1, from being affected by the conduction of the adjacent first sub-pixel SP1.

[0045] The threshold voltages of the first to third sub-pixels SP1, SP2, and SP3 are the minimum voltages required to drive the thin-film transistors (not shown) connected to the respective first electrodes 110a, 110b, and 110c. Although Figures 2 to 4 Thin-film transistors are not shown, but thin-film transistors, each comprising a semiconductor layer, a gate electrode, a source electrode, and a drain electrode, may be disposed between the substrate 100 and the first electrodes 110a, 110b, and 110c.

[0046] Opening regions 1600A, 1600B, and 1600C are provided in the first to third patterns 160b, 160a, and 160c to prevent an increase in the linear resistance of the second electrode 180 in a specific direction. The second sub-pixels 180 are co-located in sub-pixels SP1, SP2, and SP3, and are formed without a mask, or with an opening mask configured to cover only the non-active regions outside sub-pixels SP1, SP2, and SP3. The second electrode 180 is formed on the second common layer 123, comprising metal to provide good step coverage compared to the organic materials forming the common layers 121 and 123. Therefore, the second electrode 180 can be formed not only on the upper part of the second common layer 123 but also on the sides of the first and second common layers 121 and 123. However, as the angle between the side of the first spacer structure 160 and the surface of the embankment 150 decreases, areas where the second electrode 180 is not formed may appear on the side of the first spacer structure 160. Even if the second electrode 180 is not formed on a portion of the side of the first spacer structure 160, the light-emitting display device according to the invention can prevent the resistance of the second electrode 180 in a specific linear direction from increasing through the horizontal opening regions 1600A and 1600B and the vertical opening region 1600C.

[0047] The width of the first spacer structure 160 is smaller than the critical dimension CD of the light-emitting portion with the smallest size among the light-emitting portions B, R, and G of sub-pixels SP1, SP2, and SP3. Furthermore, the narrow width of the first spacer structure 160 allows multiple patterns to be spaced apart even when arranged between adjacent light-emitting portions B, R, and G, and the length of the first spacer structure 160 can be greater than the length of at least one side of each light-emitting portion in B, R, and G. The individual patterns 160b, 160a, and 160c forming the first spacer structure 160 are separated from each other to distinguish them and are disposed around the light-emitting portions B, R, and G such that their length is greater than their width to prevent lateral leakage current from adjacent sub-pixels SP1, SP2, and SP3. In the first embodiment, the third pattern 160c has an extension between adjacent opening regions 1600A and 1600B of the first pattern 160b and the second pattern 160a, thereby effectively preventing leakage current from the first sub-pixel SP1 to the second sub-pixel SP2 in the first sub-pixel SP1 and the second sub-pixel SP2 with the maximum threshold voltage difference. The extension is located vertically between the light-emitting portions G of adjacent third sub-pixels SP3, and thus can connect the third pattern 160c surrounding each light-emitting portion G. In this case, when the first sub-pixel SP1 emits light, the current path flowing from the first sub-pixel SP1 to the adjacent second sub-pixel SP2 in the same row is blocked by the first pattern 160b and the second pattern 160a, and the current path flowing directly from the first sub-pixel SP1 to the adjacent second sub-pixel SP2 in the same column is also blocked. Therefore, the current flowing in the first sub-pixel SP1 bypasses the adjacent second sub-pixel SP2 along the side of the third pattern 160c, and the current path is extended, thereby preventing the conduction of the second sub-pixel SP2 due to lateral leakage current.

[0048] Here, the opening region 1600c of the third pattern 160c surrounding the light-emitting part G of a third sub-pixel SP3 can be located on different horizontal lines.

[0049] Furthermore, in the light-emitting display device according to the present invention, the length and width of the first spacer structure 160 with an inverted conical shape provided on the embankment 150 are limited, thereby preventing an increase in the thin-film resistance of a specific region of the second electrode 180 formed after the formation of the common layers 121 and 123. Therefore, the second electrode 180 can maintain a uniform voltage in its respective regions. That is, the first spacer structure 160 has opening regions 1600A, 1600B, and 1600C for some of the light-emitting portions B, R, and G, thereby preventing an increase in the resistance of the second electrode 180 in a specific direction.

[0050] exist Figure 1In the arrangement shown, the first sub-pixel SP1 has the largest size, the second sub-pixel SP2 has the smallest size, the light-emitting portions B and R of the first and second sub-pixels SP1 and SP2 have octagonal shapes, and the light-emitting portion G of the third sub-pixel SP3 has a rectangular shape extending diagonally and having rounded corners. Furthermore, the figure shows the third sub-pixel SP3 arranged at twice the density of the first and second sub-pixels SP1 and SP2. This arrangement is merely an example, and the light-emitting display device according to the present invention proposes a method for more effectively addressing lateral leakage current in an arrangement structure where sub-pixels are arranged in a non-strip pattern. Different arrangement structures will be proposed in the following embodiments. As described below, even in these different sub-pixel arrangement structures, the first spacer structure 160 having an inverted conical shape can be arranged adjacent to the light-emitting portion to prevent lateral leakage current between the light-emitting portions of adjacent sub-pixels.

[0051] In the description of this invention, the "inverted conical shape" is a shape in which, when viewed in cross-section, the length of the upper side of the first spacer structures 160: 160a, 160b, and 160c is greater than the length of the lower side of the first spacer structures 160: 160a, 160b, and 160c, and therefore, the side of the first spacer structure 160 forms an acute angle with the surface of the embankment 150 disposed outside the first spacer structure 160. In contrast, as Figure 2 As shown, a second spacer structure 170 is provided with a positive cone shape that is the opposite of the inverted cone shape, and the "positive cone shape" is such that, when viewed from its cross section, the length of the upper side of the second spacer structure 170 is less than the length of the lower side of the second spacer structure 170, and therefore, the side of the second spacer structure 170 forms an obtuse angle with the surface of the embankment 150 provided on the outer side of the second spacer structure 170.

[0052] The second spacer structure 170 is formed with a width and height greater than the first spacer structures 160:160a, 160b, and 160c. The second spacer structure 170 primarily contacts the deposition mask (not shown) used when depositing organic matter onto the substrate 100 using a deposition mask to support the deposition mask, thereby protecting lower elements such as the embankment 150 and the first spacer structures 160:160a, 160b, and 160c. The second spacer structure 170 may be formed on the embankment 150 to be spaced apart from the first spacer structures 160:160a, 160b, and 160c. Because the second spacer structure 170 must uniformly support the deposition mask across the entire substrate 100, the second spacer structure 170 may be arranged in each of the sub-pixels SP1, SP2, and SP3 to have a specified width (area).

[0053] The aforementioned embankment 150, first spacer structure 160, and second spacer structure 170 can be formed of organic insulating materials such as acrylic acid, polyimide, and / or polyamide. The embankment 150, first spacer structure 160, and second spacer structure 170 can comprise the same organic insulating material, or at least one of the embankment 150, first spacer structure 160, and second spacer structure 170 can comprise different organic insulating materials. Furthermore, to form different heights and different conical shapes, the embankment 150, first spacer structure 160, and second spacer structure 170 can be formed using different processes, or the embankment 150 and second spacer structure 170 can first be formed from the same organic material using a halftone mask, and subsequently, the first spacer structure 160 can be formed from a different organic material in a region spaced apart from the second spacer structure 170.

[0054] In the light-emitting display device according to a first embodiment of the present invention, in order to control the lateral leakage current, the first spacer structures 160: 160a, 160b and 160c are not limited to the single-axis shape in the plan view, but have a shape surrounding the light-emitting portions B, R and G, and include opening regions 1600A, 1600B and 1600C in a virtual closed loop configured to surround the light-emitting portions B, R and G. Furthermore, as Figure 1 As shown, the first sub-pixel SP1 and the second sub-pixel SP are arranged alternately in a row, such that the opening regions 1600A and 1600B of the first pattern 160b and the second pattern 160a are located on the same horizontal line, and the extension of the third pattern 160c passes between the first pattern 160b and the second pattern 160a. Thus, due to the presence of the third pattern 160c between the opening regions 1600A and 1600B, leakage current between the first sub-pixel SP1 and the second sub-pixel SP2 on the horizontal line passing through the opening regions 1600A and 1600B can be prevented.

[0055] In some cases, the opening region 1600A of the first pattern 160b and the opening region 1600B of the second pattern 160a may be located on different horizontal lines to extend the path of leakage current flowing on the horizontal line.

[0056] The first electrodes 110a, 110b and 110c may have protrusions extending outward from the respective light-emitting portions B, R and G, and the protrusions may be connected to the corresponding thin-film transistors (not shown).

[0057] The common layers 121 and 123 of the common structure are formed together without distinguishing between sub-pixels SP1, SP2, and SP3. That is, these common layers 121 and 123 can be formed on the substrate 100 without using any mask, or they can be formed on the substrate 100 using a common mask that exposes all sub-pixels SP1, SP2, and SP3 on the substrate 100 while covering the non-active areas outside the sub-pixels SP1, SP2, and SP3. Therefore, the use of fine metal masks with openings finely adjusted to correspond to the light-emitting portions of individual or specific sub-pixels is reduced, thereby significantly reducing equipment overhead, and since it is not necessary to align the individual common layers with each other, the yield can be significantly improved.

[0058] The common layer structure, including common layers 121 and 123, may include, for example, an organic stack for forming a light-emitting device. The organic stack may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a charge generation layer. The light-emitting device includes a first electrode 110a, 110b, or 110c, a second electrode 180, and an organic stack located between the first electrode 110a, 110b, or 110c and the second electrode 180.

[0059] Figures 2 to 4 The example shown illustrates a first electrode 110a and 110b, a second electrode 180, a first common layer 121, light-emitting layers 122a and 122b, and a second common layer 123, sequentially deposited in the upward direction on a substrate 100 in the first sub-pixel SP1 and the second sub-pixel SP2. Although not shown in these figures, the third sub-pixel SP3 may have the same layer structure as the first sub-pixel SP1 and the second sub-pixel SP2.

[0060] Although the illustrated example shows the first common layer 121 as a single layer disposed below the light-emitting layers 122a and 122b, and the second common layer 123 as a single layer disposed on the light-emitting layers 122a and 122b, the present disclosure is not limited thereto. The first common layer 121 may include different layers, such as a hole injection layer, a hole transport layer, and an electron blocking layer, and the second common layer 123 may include different layers, such as a hole blocking layer and an electron transport layer. Furthermore, although the illustrated example shows the light-emitting layers 122a and 122b as a single layer in the first sub-pixel SP1 and the second sub-pixel SP2, multiple stacked portions separated from each other by charge-generating layers may be provided between the first electrodes 110a, 110b, and 110c and the second electrode 180. Here, each "stacked portion" refers to a structure that substantially includes a hole transport layer, a light-emitting layer, and an electron transport layer.

[0061] Figure 2 and Figure 4 The example shows a first light-emitting layer 122a configured to emit light of a first color, independently disposed in each first sub-pixel SP1, and a second light-emitting layer 122b configured to emit light of a second color different from the first color, independently disposed in each second sub-pixel SP2. The first and second light-emitting layers 122a and 122b can be formed using a fine metal mask having openings corresponding to the light-emitting portions B of the first sub-pixel SP1 and R of the second sub-pixel SP2, so as to selectively form in the light-emitting portions B of the first sub-pixel SP1 and R of the second sub-pixel SP2. Although not shown in these figures, a light-emitting layer configured to emit light of a different color than the light emitted by the first and second light-emitting layers 122a and 122b can be disposed in each third sub-pixel SP3 in the same manner.

[0062] although Figures 2 to 4 The example shown depicts light-emitting layers 122a and 122b as independently disposed in each sub-pixel to present the color of light emitted from each sub-pixel. However, the light-emitting display device according to the present invention is not limited to this, and the light-emitting layer may also be formed together in multiple sub-pixels. In this case, in order to present various colors of light, a color filter layer or color conversion member may be further disposed independently of the light-emitting layer on the emission side of the light-emitting display device.

[0063] The first sub-pixel SP1 may include a first electrode 110a, a second electrode 180, and a first light-emitting layer 122a between the first electrode 110a and the second electrode 180 to emit light of a first color. The first light-emitting layer 122a is configured to contact a first common layer 121 and a second common layer 123. The second sub-pixel SP2 may include a first electrode 110b, a second electrode 180, and a second light-emitting layer 122b between the first electrode 110b and the second electrode 180 to emit light of a second color with a wavelength longer than the wavelength of the first color. The second light-emitting layer 122b is configured to contact the first common layer 121 and the second common layer 123. The third sub-pixel SP3 may include a first electrode 110c, a second electrode 180, and a third light-emitting layer between the first electrode 110b and the second electrode 180 to emit light of a third color with a wavelength between the wavelength of the first color and the wavelength of the second color. The third light-emitting layer is configured to contact the first common layer 121 and the second common layer 123.

[0064] Although the illustrated example of the light-emitting display device according to the present invention shows that the first color is blue, the second color is red, and the third color is green, the present disclosure is not limited to this color combination, and other color combinations can be implemented. In addition to the first to third colors, sub-pixels configured to emit white light or light having colors other than the first to third colors can also be provided.

[0065] Organic light-emitting materials for various colors require different threshold voltages, and among the currently known blue, green, and red organic light-emitting materials, blue organic light-emitting materials have the highest threshold voltage, while red organic light-emitting materials have the lowest. Therefore, in a light-emitting display device without a structure for preventing lateral leakage current, such as the first spacer structure 160, even when only the blue sub-pixel is selectively turned on, other sub-pixels driven by a threshold voltage lower than that of the blue sub-pixel can still be turned on. In this case, among the red and green sub-pixels, the red sub-pixel driven by the lower threshold voltage may be more affected by the conduction of the blue sub-pixel. Depending on the threshold voltage of the color of light emitted by each sub-pixel, in the light-emitting display device according to the invention, the first spacer structure 160 can be configured such that weights are distributed between the blue sub-pixel and the red sub-pixels among the red and green sub-pixels adjacent to the blue sub-pixel.

[0066] Figure 1 It is shown that: in Figure 1 Of the sub-pixels SP1, SP2, and SP3 shown, the first sub-pixel SP1 has the largest size, and the second sub-pixel SP2 has the smallest size. The color of the light emitted by the largest or smallest sub-pixel can vary depending on the application of the light-emitting display device.

[0067] In the light-emitting display device according to the present invention, as described above, the common layer structure including the first common layer 121 and the second common layer 123 is structurally divided by the first spacer structure 160 into a region on the first spacer structure 160 and a region around the first spacer structure 160 without a fine metal mask. And because of the deposition of organic material with high straightness of the common layers 121 and 123, the first common layer 121 and the second common layer 123 are not formed on the inverted conical side surface of the first spacer structure 160, and are therefore divided into regions corresponding to adjacent sub-pixels.

[0068] The second electrode 180, formed after the formation of the second common layer 123, is formed of a transparent or reflective component or an opaque metal component. Compared to the first common layer 121 and the second common layer 123, which contain organic matter, the second electrode 180 with a metal component has good step coverage. The second electrode 180 can be formed on a portion of the side of the first spacer structure 160, and can be formed to cover not only the upper portions of the first common layer 121 and the second common layer 123, but also the sides of the first common layer 121 and the second common layer 123 formed on the embankment 150.

[0069] In the light-emitting display device according to the present invention, since the common layer structure including the first common layer 121 and the second common layer 123 must be separated by the first spacer structure 160, the height of the first spacer structure 160 can be greater than the total thickness of the organic stack portion formed between the first electrode 110a, 110b or 110c and the second electrode 180. The organic stack portion includes a light-emitting layer, and when the thicknesses of the organic stack portions of each sub-pixel SP1, SP2 and SP3 are different, the first spacer structure 160 is formed to have a height greater than the thickness of the thickest organic stack portion. To prevent lateral leakage current caused by the first spacer structure 160, Figures 2 to 4 The width of the lower side of the first spacer structure 160 shown can be from 1 μm to 5 μm, and the height of the first spacer structure 160 can be equal to or greater than 1 μm, which is less than the height of the second spacer structure 170. The width of the upper side of the second spacer structure 170 can be 3 to 10 times the width of the lower side of the first spacer structure 170, and the height of the second spacer structure 170 can be equal to or less than 5 μm.

[0070] Although not shown in the accompanying drawings, a capping layer (not shown) may be provided on the second electrode 180 to improve luminous efficiency. An encapsulation layer, formed by alternating inorganic and organic films or encapsulation substrates, may also be provided on the capping layer to protect the light-emitting device from the surrounding air and block moisture. When the encapsulation layer is applied, it extends into the sides of the first spacer structure 160 and the second spacer structure 170 on the embankment 150. At least the organic film of the encapsulation layer has a thickness equal to or greater than the sum of the thickness of the embankment 150 and the height of the second spacer structure 170. Therefore, the upper surface of the encapsulation layer flattens the entire area of ​​the light-emitting display device, including the sub-pixels.

[0071] Figure 5 This is a plan view showing a light-emitting display device according to a second embodiment of the present invention.

[0072] like Figure 5As shown, in the light-emitting display device according to the second embodiment of the present invention, the third pattern 160d of the first spacer structure 160A is arranged with a low density, and therefore, the third opening region 1600D of the third pattern 160d is relatively expanded compared to the first embodiment. In this case, compared to the first embodiment, the density of the first spacer structure 160A in the horizontal row where the third sub-pixels SP3 are arranged adjacent to each other relative to the second electrode 180 is reduced, so the resistance of the second electrode 180 can be reduced, and the first and third patterns 160b, 160a and 160d are arranged to correspond to the corresponding light-emitting portions B, R and G, and therefore, in the same manner as the first embodiment, the following effect can be achieved: when a specific sub-pixel is turned on, the current flow from the corresponding sub-pixel to the light-emitting portion of the adjacent sub-pixel is blocked.

[0073] Figure 6 This is a plan view showing a light-emitting display device according to a third embodiment of the present invention.

[0074] like Figure 6 As shown, in the light-emitting display device according to the third embodiment of the present invention, in the first spacer structure 160B, the second pattern 160e, which is configured to surround the light-emitting portion R of the second sub-pixel SP2, is divided into four parts, thereby having second opening regions 1600B that are symmetrical to each other on the horizontal line and first sub-opening regions 1600E that are symmetrical to each other on the vertical line. Similar to the second embodiment, the third pattern 160d is arranged with a low density, thus reducing the resistance of the second electrode 180 in the horizontal direction.

[0075] Furthermore, the first sub-aperture region 1600E has a relatively large size, and the first pattern 160b is arranged opposite to the first sub-aperture region 1600E. Therefore, in the first sub-pixel SP1 and the second sub-pixel SP2 arranged perpendicularly adjacent to each other, the leakage current flowing directly from the first sub-pixel SP1 to the second sub-pixel SP2 in the vertical direction can be blocked by the first pattern 160b, and the leakage current flowing from the light-emitting part B of the first sub-pixel SP1 through the first opening region 1600A can bypass the space between the first pattern 160b and the adjacent third pattern 160d. Therefore, leakage current in the vertical direction can be prevented or minimized.

[0076] The leakage current flowing in the horizontal direction is blocked by the third pattern 160d located between the second opening region 1600B and the first opening region 1600A, with the same effect as in the first embodiment.

[0077] In other words, even in this case, the first to third patterns 160b, 160e and 160d are configured to surround the corresponding light-emitting parts B, R and G, and thus, in the same manner as the first embodiment, the following effect can be achieved: when a specific sub-pixel is turned on, the flow of current from the corresponding sub-pixel to the light-emitting part of the adjacent sub-pixel is blocked.

[0078] Furthermore, in the light-emitting display device according to the third embodiment of the present invention, such as Figure 6 As shown, since a first sub-opening region 1600E is additionally provided, the space between the first sub-pixel SP1 and the second sub-pixel SP2 that are vertically adjacent to each other on the embankment 150 is increased, thus ensuring the area margin for arranging the second spacer structure 170 between the first sub-pixel SP1 and the second sub-pixel SP2 that are vertically adjacent to each other.

[0079] Figure 7 This is a plan view showing a light-emitting display device according to a fourth embodiment of the present invention.

[0080] like Figure 7 As shown, in the light-emitting display device according to the fourth embodiment of the present invention, in the first spacer structure 160C, the first pattern 160g, which is configured to surround the light-emitting portion B of the first sub-pixel SP1, is divided into four parts, and thus has a first opening region 1600A that is symmetrical to each other in the horizontal direction and a second sub-opening region 1600G that is symmetrical to each other in the vertical direction, in the same manner as the second pattern 160e. Compared with the third embodiment, a fourth opening region 1600F is also formed in the extension of the third pattern 160f, which is configured to surround the light-emitting portion G of the adjacent third sub-pixel SP3.

[0081] Because the distance between the light-emitting portions B and R of the first sub-pixel SP1 and the second sub-pixel SP2, which are adjacent to each other in the vertical direction, is long, the flow path of the leakage current is long, thus reducing the impact of the leakage current. Since the first opening region 1600A of the first pattern 160g, the fourth opening region 1600F of the third pattern 160f, and the second opening region 1600B of the second pattern 160e are continuously located between the first sub-pixel SP1 and the second sub-pixel SP2, which are adjacent to each other in the horizontal direction, some leakage current may occur in the horizontal direction compared to the first to third embodiments. However, the fourth opening region 1600F is located at a position different in the vertical direction from the first opening region 1600A and the second opening region 1600B, thereby enabling a bypass of the leakage current in the horizontal direction. Alternatively, the continuous distance between the first opening region 1600A, the fourth opening region 1600F, and the second opening region 1600B, which are continuously positioned in the horizontal, vertical, or diagonal length direction, can be reduced to minimize the width of the leakage current path in the length direction.

[0082] In addition, such as Figure 7 As shown, the light-emitting display device according to the fourth embodiment of the present invention can increase the margin for arranging the second spacer structure 170 and reduce the resistance of the second electrode 180 in the same manner as the third embodiment.

[0083] Figure 8 This is a plan view showing a light-emitting display device according to a fifth embodiment of the present invention.

[0084] like Figure 8 As shown, compared to the fourth embodiment, in the light-emitting display device according to the fifth embodiment of the present invention, the first spacer structure 160D further includes a strip-shaped fourth pattern 160h between the first sub-pixel SP1 and the second sub-pixel SP2 that are adjacent to each other in the vertical direction. In this case, the fourth pattern 160h can be arranged in an island shape, and although the figure shows two fourth patterns 160h arranged between the first sub-pixel SP1 and the second sub-pixel SP2 that are adjacent to each other, one fourth pattern 160h or three or more fourth patterns 160h can be arranged to increase the arrangement density.

[0085] Figure 8 The light-emitting display device according to the fifth embodiment shown includes a fourth pattern 160h, and therefore, compared with the fourth embodiment, it can more effectively block leakage current in the vertical direction.

[0086] Other modified implementations will be described below.

[0087] Figures 9A to 9EThis is a plan view showing a light-emitting display device according to the sixth to tenth embodiments of the present invention.

[0088] like Figure 9A As shown, in the light-emitting display device according to the sixth embodiment of the present invention, the first spacer structure 260A includes a first pattern 260b configured to surround the light-emitting portion B of the first sub-pixel SP1, a second pattern 260a configured to surround the light-emitting portion R of the second sub-pixel SP2, and third patterns 260c and 260d configured to surround the light-emitting portion G of the third sub-pixel SP3.

[0089] Here, the first pattern 260b and the second pattern 260a include a first opening region 2600A and a second opening region 2600B that are not on the same horizontal line. This increases the effect of preventing leakage current in the horizontal direction.

[0090] Furthermore, the third patterns 260c and 260d can be divided into a first sub-pattern 260c adjacent to the first pattern 260b and a second sub-pattern 260d adjacent to the second pattern 260a. The first sub-pattern 260c and the second sub-pattern 260d may have a third opening region 2600C between them in the vertical direction adjacent to the light-emitting portion G. In this case, the two third opening regions 2600C located on the left and right sides of the light-emitting portion G can be arranged on different horizontal lines. Furthermore, the first sub-pattern 260c and the second sub-pattern 260d have a curved shape extending outward from the light-emitting portion G. Furthermore, the first sub-pattern 260c and the second sub-pattern 260d may have a fourth opening region 2600D outside the light-emitting portion G, and in this case, the two third opening regions 2600D located on the left and right sides of the light-emitting portion G can also be arranged on different horizontal lines.

[0091] The first opening region 2600A, the fourth opening region 2600D, and the second opening region 2600B are located on different horizontal lines between the first sub-pixel SP1 and the second sub-pixel SP2, which are adjacent to each other in the horizontal direction, thus forming a sawtooth path for leakage current. Therefore, when a specific sub-pixel is turned on, the path length of leakage current can be increased, thereby minimizing the generation of lateral leakage current.

[0092] like Figure 9BAs shown, in the light-emitting display device according to the seventh embodiment of the present invention, the first spacer structure 260B includes a first pattern to a third pattern 260f, 260e and 260g, the first pattern to the third pattern 260f, 260e and 260g being configured to surround the respective light-emitting portions B, R and G of the first pixel to the third sub-pixels SP1, SP2 and SP3, the first pattern 260f having a fifth opening region 2600E, the second pattern 260e having a sixth opening region 2600F and the third pattern 260g having a seventh opening region 2600G.

[0093] In this case, when the distance between the light-emitting parts B, R and G of sub-pixels SP1, SP2 and SP3 is long enough, it can block leakage current.

[0094] like Figure 9C As shown, in the light-emitting display device according to the eighth embodiment of the present invention, the first spacer structure 260C is configured such that an eighth opening region 2600H is formed on only one side of the first pattern 260i surrounding the emitting portion B of each first sub-pixel in the first sub-pixel SP1, and a ninth opening region 2600I is formed on only one side of the second pattern 260h surrounding the light-emitting portion R of each second sub-pixel in the second sub-pixel SP2. In this case, each of the first pattern 260i and the second pattern 260h is not separated and is set as a single unit. Furthermore, the third pattern 260j, which is configured to extend around the light-emitting portion G of the third sub-pixel SP3, bends upward and downward from the light-emitting portion G in an outward direction, and thus passes between the first pattern 260i and the second pattern 260h adjacent to each other. The third pattern 260j is formed separately on both sides of the light-emitting part G, and may have a tenth opening region 2600J, which is formed in the extension of the third pattern 260j outside the light-emitting part G on different horizontal lines parallel to each other.

[0095] In the light-emitting display device according to the eighth embodiment, the opening regions 2600H, 2600I and 2600J are discontinuous in both the horizontal and vertical directions, thereby effectively blocking leakage current.

[0096] like Figure 9DAs shown, compared to the eighth embodiment, in the light-emitting display device according to the ninth embodiment of the present invention, the first spacer structure 260D further includes a closed loop-shaped fifth pattern 260m spaced apart from the first pattern 260i and the second pattern 260h between the first sub-pixels SP1 and SP2 that are adjacent to each other in the vertical direction. In this case, since the current flowing in the light-emitting portion B of the first sub-pixel SP1 flows out through the eighth opening region 2600H at least between the first sub-pixels SP1 and SP2 that are adjacent to each other in the vertical direction, bypasses the fifth pattern 260m, and then flows into the ninth opening region 2600I formed on one side of the light-emitting portion R of the second sub-pixel SP2, the path of leakage current is extended compared to the eighth embodiment, thereby the influence of leakage current between the first sub-pixels SP1 and SP2 is small.

[0097] Furthermore, between the first sub-pixel SP1 and the third sub-pixel SP3, the current flowing in the light-emitting part B of the first sub-pixel SP1 flows out through the eighth opening region 2600H, bypasses the fifth pattern 260m, and flows along the shape of the bend in the tenth opening region 2600J of the third pattern 260k opposite to the eighth opening region 2600H. Therefore, due to this current path, the influence of the leakage current between the first sub-pixel SP1 and the third sub-pixel SP3 is very small.

[0098] like Figure 9E As shown, compared to the eighth embodiment, in the light-emitting display device according to the tenth embodiment of the present invention, the first spacer structure 260E further includes a first protrusion pattern 260j and a second protrusion pattern 260n that protrude from the first pattern 260h and the second pattern 260i, which are configured to surround the light-emitting portions B and R of the first sub-pixel SP1 and the second sub-pixel SP2, and are spaced apart from each other. In this case, the first protrusion pattern 260j is spaced apart from the adjacent second pattern 260i by an eleventh opening region 2600L, and the second protrusion pattern 260n is spaced apart from the adjacent first pattern 260h by a twelfth opening region 2600K.

[0099] In the light-emitting display device according to the tenth embodiment, the current flowing outward from the first sub-pixel SP1 through the eighth opening region 2600H passes between adjacent first patterns 260h and third patterns 260k, between adjacent first protrusion patterns 260j and third patterns 260k, through the eleventh opening region 2600L, bends to pass between the first protrusion pattern 260j and the second protrusion pattern 260n, passes through the twelfth pattern 2600K, passes through adjacent second protrusion patterns 260n and third patterns 260k, passes along the second pattern 260h, and then passes through the ninth opening region 2600I of the second pattern 260h. In this case, the current flow path is very long, thus preventing the influence of leakage current between the first sub-pixel SP1 and the second sub-pixel SP2.

[0100] The current flowing between the first sub-pixel SP1 and the third sub-pixel SP3 also passes through a zigzag path passing through the eleventh opening region 2600L and the twelfth opening region 2600K between the first protrusion pattern 260j and the second protrusion pattern 260n and the adjacent second pattern 260h and first pattern 260i. Therefore, the current flowing out of the first sub-pixel SP1 has almost no effect on the adjacent third sub-pixel SP3.

[0101] In the following text, the shape of the first spacer structure in other embodiments of the structure and arrangement of subpixels that differ from the structure and arrangement of the subpixels described above will be described.

[0102] Figures 10A to 10H This is a plan view showing a light-emitting display device according to embodiments eleven to eighteen of the present invention.

[0103] In the light-emitting display apparatus according to the eleventh to eighteenth embodiments described below, a common feature is that a first sub-pixel SP1 is arranged in a first axial direction (vertical direction in these figures), a second sub-pixel SP2 and a third sub-pixel SP3 are alternately arranged in the first axial direction, and the first sub-pixel SP1 has a shape that is configured to be adjacent to at least one of the second sub-pixel SP2 and the third sub-pixel SP3 in a second axial direction that intersects the first axial direction (horizontal direction in these figures).

[0104] Furthermore, the first sub-pixel to the third sub-pixel SP1, SP2 and SP3 respectively include light-emitting portions B, R and G formed therein, and the areas of the first sub-pixel to the third sub-pixel SP1, SP2 and SP3 exposed from the embankment 350 can be referred to as light-emitting portions B, R and G.

[0105] In the first sub-pixel to the third sub-pixel SP1, SP2 and SP3, there are first electrodes 310a, 310b and 310c that overlap with the corresponding light-emitting parts B, R and G and overlap with the embankment 350 at their edges.

[0106] The first electrodes 310a, 310b, and 310c of the first to third sub-pixels SP1, SP2, and SP3 can be connected via connecting portions CT1, CT2, and CT3 to a substrate 400 (see reference). Figures 2 to 4 Thin-film transistors on ).

[0107] like Figure 10A As shown, in the light-emitting display device according to the eleventh embodiment of the present invention, the first spacer structure 360A may include: a first pattern 360a, which is arranged in a first axial direction (that is, a vertical direction) between a first sub-pixel SP1 and a second sub-pixel SP2; and second patterns 360b and 360c, which are arranged between the second sub-pixel SP2 and a third sub-pixel SP3. The second patterns 360b and 360c may be arranged in a second axial direction (that is, a horizontal direction) intersecting the first axial direction.

[0108] The first pattern 360a may have a first opening region 3600A adjacent to the light-emitting part B of the first sub-pixel SP1, and the first opening region 3600A may be adjacent to the light-emitting part G of the third sub-pixel SP3.

[0109] Furthermore, the second patterns 360b and 360c may have a second opening region 3600B between adjacent second sub-pixels SP2 and SP3. The second patterns 360b and 360c may be divided into: a main pattern 360b, which is adjacent to the center of the light-emitting portion B of the first sub-pixel SP1 and extends between the second sub-pixel SP2 and the third sub-pixel SP3; and a secondary pattern 360c, which is adjacent to the edge of the light-emitting portion B of the first sub-pixel SP1 and extends between the second sub-pixel SP2 and the third sub-pixel SP3.

[0110] Furthermore, the first pattern 360a may have a third opening region 3600C between the first sub-pixel SP1 and the second sub-pixel SP2. In terms of preventing leakage current from the first sub-pixel SP1 to the second sub-pixel SP2, it may be more effective to position the third opening region 3600C in a portion of the first pattern 360a that is not adjacent to the light-emitting portion R of the second sub-pixel SP2.

[0111] Here, the first pattern 360a and the second patterns 360b and 360c can be connected to each other. The connection between them can be formed at the intersection between the first sub-pixel SP1 and the second sub-pixel SP2 and the third sub-pixel SP3. Therefore, the first spacer structure 360A can be arranged at the intersection, and thus, when the first sub-pixel SP1 is turned on, the shortest path of current from the first sub-pixel SP1 to the second sub-pixel SP2 and the third sub-pixel SP3 is blocked, thereby improving the effect of preventing leakage current.

[0112] The first opening region 3600A and the third opening region 3600C provided in the first pattern 360a, and the second opening region 3600B provided in the second patterns 360b and 360c, are used to prevent the formation of organic stacking portions 121, 122a / 122b and 123 (see reference) in the vertical direction. Figures 2 to 4 The second electrode 180 on the (refer to) Figures 2 to 4 The resistance increases.

[0113] According to this embodiment, the light-emitting display device redirects the current flowing from the center of the light-emitting portion B of the first sub-pixel SP1, thereby reducing the impact of the conduction of the first sub-pixel SP1 on the driving of the second sub-pixel SP2 and the third sub-pixel SP3 adjacent to the first sub-pixel SP1.

[0114] like Figure 10B As shown, compared with the eleventh embodiment, in the light-emitting display device according to the twelfth embodiment of the present invention, the first spacer structure 360B is configured such that the second pattern 360d does not have an opening area, so as to completely isolate the light-emitting portions R and G of the second sub-pixel SP2 and the third sub-pixel SP3 from each other.

[0115] In this case, a further advantage of the light-emitting display device according to the twelfth embodiment is that leakage current from the light-emitting part G of the third sub-pixel SP3, which has a relatively high threshold voltage, to the light-emitting part R of the second sub-pixel SP2 is blocked.

[0116] like Figure 10C As shown, compared with the eleventh embodiment, in the light-emitting display device according to the thirteenth embodiment of the present invention, the first spacer structure 360C is configured such that the first pattern 360f does not have an opening area, thereby completely isolating the first sub-pixel SP1 from the second sub-pixel SP2 and the third sub-pixel SP3.

[0117] In this case, a further advantage of the light-emitting display device according to the thirteenth embodiment is that leakage current from the light-emitting part B of the first sub-pixel SP1, which has the highest threshold voltage, to the light-emitting parts R and G of the second sub-pixel SP2 and the third sub-pixel SP3 is blocked.

[0118] like Figure 10D As shown, compared to the eleventh embodiment, in the light-emitting display device according to the fourteenth embodiment of the present invention, the first spacer structure 360D further includes a first auxiliary pattern 360g parallel to the first pattern 360a, and two second patterns 360c1 and 360c2 are connected to the first pattern 360a. The light-emitting display device according to the fourteenth embodiment can have similar effects as the eleventh embodiment in preventing leakage current and reducing the resistance of the second electrode.

[0119] like Figure 10E As shown, compared to the twelfth embodiment, in the light-emitting display device according to the fifth embodiment of the present invention, the first spacer structure 360E further includes a first auxiliary pattern 360h parallel to the first pattern 360a, and two second patterns 360c1 and 360c2 are connected to the first pattern 360a. Compared to the fourteenth embodiment, no opening regions are formed in the second patterns 360c1 and 360c2, thus improving the effect of blocking leakage current between the second sub-pixel SP2 and the third sub-pixel SP3.

[0120] Furthermore, the fourth opening region 3600D and the fifth opening region 3600E formed in the first auxiliary pattern 360h adjacent to the light-emitting part B of the first sub-pixel SP1 are located on different horizontal lines than the horizontal lines on which the first opening region 3600A and the third opening region 3600C are formed. As a result, the direct path of the current is blocked, thereby improving the effect of preventing leakage current.

[0121] like Figure 10F As shown, compared to the fifth embodiment, in the light-emitting display device according to the sixteenth embodiment of the present invention, the first spacer structure 360E further includes a first auxiliary pattern 360f parallel to the first pattern 360a and without an opening region, and two second patterns 360c1 and 360c2 are connected to the first pattern 360a. Compared to the fifteenth embodiment, no opening region is formed in the first auxiliary pattern 360f; therefore, leakage current from the light-emitting portion B of the first sub-pixel SP to the light-emitting portion R of the second sub-pixel SP2 and the light-emitting portion G of the third sub-pixel SP3 can be completely blocked.

[0122] like Figure 10GAs shown, in the light-emitting display device according to the seventeenth embodiment of the present invention, the first spacer structure 360G may include: a first pattern 360i and a first auxiliary pattern 360j arranged parallel to each other in a first axial direction (vertical direction) between the first sub-pixel SP1 and the second sub-pixel SP2; and second patterns 360c1 and 360c2 arranged parallel to each other in a second axial direction intersecting the first axial direction between the second sub-pixel SP2 and the third sub-pixel SP3. The second patterns 360c1 and 360c2 may have second opening regions 3600B adjacent to each other.

[0123] The first pattern 360i and the first auxiliary pattern 360j may each have a first opening region 3600A and a fourth opening region 3600D that are not adjacent to each other. In the light-emitting display device according to the seventeenth embodiment, the current flowing from the light-emitting part B of the first sub-pixel SP1 bypasses the light-emitting part G of the third sub-pixel SP3 through the first opening region 3600D and the fourth opening region 3600A that are not adjacent to each other, thereby minimizing the impact of the leakage current from the first sub-pixel SP1 on the third sub-pixel SP3.

[0124] Furthermore, the direct path of current from the first sub-pixel SP1 to the second sub-pixel SP2 in both the horizontal and vertical directions is blocked, thereby completely blocking the influence of leakage current from the first sub-pixel SP1 on the second sub-pixel SP2.

[0125] like Figure 10H As shown, in the light-emitting display device according to the eighteenth embodiment of the present invention, the first spacer structure 360G may include: a first pattern 360a1 and 360a2 and a first auxiliary pattern 360j arranged in parallel in a first axial direction (vertical direction) between the first sub-pixel SP1 and the second sub-pixel SP2; and a second pattern 360b1 and 360b2 arranged in parallel in a second axial direction intersecting the first axial direction between the second sub-pixel SP2 and the third sub-pixel SP3. The second patterns 360c1 and 360c2 may have second opening regions 3600B adjacent to each other.

[0126] The first pattern 360a is divided into a first sub-pattern 360a1 and a second sub-pattern 360a2, and therefore may have a first opening region 3600A adjacent to the light-emitting portion G of the third sub-pixel SP3 between the first sub-pattern 360a1 and the second sub-pattern 360a2, and a third opening region 3600C adjacent to the light-emitting portion R of the second sub-pixel SP2 between the second sub-pattern 360a2 and the first sub-pattern 360a1. Furthermore, the first pattern 360a may also include a connecting portion 360k, configured to connect the parallel first patterns 360a1 and 360a2 and the first auxiliary pattern 360j. The first auxiliary pattern 360j may have a fifth opening region 3600E arranged on a different horizontal line than the first opening region 3600A and the third opening region 3600C. The connecting portion 360k is located between the parallel first patterns 360a1 and 360a2 and the first auxiliary pattern 360j, thereby blocking leakage current or guiding current flow.

[0127] In the light-emitting display device according to the eighteenth embodiment shown in the figure, the path of the current flowing out from the light-emitting part B of the first sub-pixel SP1 bypasses the second sub-pixel SP2 through the fifth opening region 3600D and the third opening region 3600C, which are not adjacent to each other. Therefore, the influence of the leakage current from the first sub-pixel SP1 on the second sub-pixel SP2 can be minimized.

[0128] Furthermore, the direct path of current from the first sub-pixel SP1 to the third sub-pixel SP3 in both the horizontal and vertical directions is blocked, thereby completely blocking the influence of leakage current from the first sub-pixel SP1 on the third sub-pixel SP3.

[0129] In the light-emitting display device according to the eleventh to eighteenth embodiments, a second spacer structure 170 (see reference) can be formed having a larger area and a greater height than the first spacer structures 360A to 360G. Figure 1 The second spacer structure 170 is spaced apart from each of the first spacer structures 360A to 360G, and therefore primarily contacts the deposition mask to support the deposition mask, thereby protecting the elements disposed below the second spacer structure (e.g., the embankment and the first spacer structure).

[0130] Figure 11 This is a plan view showing a light-emitting display device according to the nineteenth embodiment of the present invention.

[0131] like Figure 11As shown, in the light-emitting display device according to the nineteenth embodiment of the present invention, a first spacer structure 60 is formed to completely surround the light-emitting portions B, R, and G of each sub-pixel SP1, SP2, and SP3. In this case, the conduction operation of each sub-pixel can prevent the influence of other sub-pixels on the conduction operation of each sub-pixel. However, due to the horizontal and vertical connection of the first spacer structure 60, the resistance of the second electrode (cathode), which must be formed on the entire surface of the sub-pixel, may increase in both the horizontal and vertical directions. Therefore, from the viewpoint of maintaining a uniform voltage in the second electrode, it is desirable for the light-emitting display device according to the eleventh to eighteenth embodiments of the present invention to have an opening region provided on at least one of the light-emitting portions.

[0132] In the following text, Test Example 1 will be described, which was implemented to comparatively illustrate the effect presented by the first spacer structure of the light-emitting display device according to the invention.

[0133] Figure 12A and Figure 12B These are optical images of a light-emitting display device according to Test Example 1, such as the first embodiment of the present invention, and a light-emitting display device according to Test Example 2, when emitting blue light at a low gray level.

[0134] In the following text, the light emission states of a light-emitting display device having a first spacer structure 160 according to Test Example 1, such as the first embodiment of the present invention, and a light-emitting display device without a first spacer structure according to Test Example 2, are observed by microscopy when only its blue sub-pixels are turned on.

[0135] like Figure 12A As shown, it can be confirmed that in the light-emitting display device according to Test Example 1, for example, in which a first spacer structure 160 having an inverted conical shape is provided, only the blue sub-pixel emits light. Furthermore, it can be confirmed that because the first spacer structure has an open area, voltage is uniformly applied to the second electrode (cathode), thus the blue sub-pixel effectively emits light.

[0136] On the contrary, such as Figure 12B As shown, it can be confirmed that in the light-emitting display device of Test Example 2 without the first spacer structure having an inverted conical shape, when the blue sub-pixel is turned on, the red sub-pixels with low threshold voltages surrounding the blue sub-pixel are turned on. That is, the unwanted sub-pixel turn-on due to lateral leakage current leads to a degradation in image quality.

[0137] Figure 13 This is a SEM image of a first spacer structure having an inverted conical shape and surrounding elements in a light-emitting display device according to the present invention, after the formation of the first encapsulation layer.

[0138] Figure 13 The diagram illustrates the first spacer structure and surrounding elements of the light-emitting display device according to the invention after the formation of the first encapsulation layer. It is confirmed that the organic stacking portion is not formed on the sides of the first spacer structure, but rather on the flat upper portion and the upper surface of the embankment of the first spacer structure. Therefore, the organic stacking portion is divided into stepped regions between the upper portion and the upper surface of the embankment of the first spacer structure. The thickness of the first encapsulation layer formed of inorganic material on the organic stacking portion is equal to or greater than about 1 μm, and it is confirmed that the first encapsulation layer formed of inorganic material is formed continuously. Therefore, the first encapsulation layer is formed not only continuously on the surfaces of the upper portion and the embankment of the first spacer structure, but also on the sides of the first spacer structure.

[0139] This means that, due to the first spacer structure, the organic stack is divided into regions corresponding to each sub-pixel, and after the second electrode is formed, the first encapsulation layer is formed to cover the first spacer structure without being broken, so the light-emitting display device is properly encapsulated.

[0140] After the first encapsulation layer is formed, a second encapsulation layer made of organic material can be provided on the light-emitting display device to planarize all areas of the light-emitting display device.

[0141] In the light-emitting display device according to each of the above embodiments of the present invention, a first spacer structure having an inverted conical shape is located on the embankment between adjacent sub-pixels, and the common layer deposited after the formation of the first spacer structure is broken at the first spacer structure having an inverted conical shape, thereby blocking the lateral leakage current caused by the highly conductive common layer.

[0142] Furthermore, the length and width of the first spacer structure with an inverted conical shape disposed on the embankment are limited, thereby preventing an increase in the thin-film resistance of a specific area of ​​the second electrode (cathode) formed after the formation of the common layer structure. Therefore, the second electrode can maintain a uniform voltage. In other words, the first spacer structure has open areas relative to at least some of the light-emitting portions, thus preventing an increase in the resistance of the second electrode.

[0143] Furthermore, with the diversification of pixel structures in display devices, the first spacer structure is not limited to a single-axis shape, but has a shape that surrounds the light-emitting part and includes an opening region formed in certain portions of a closed-loop pattern configured to surround the light-emitting part to further guide the flow of current, thereby increasing the distance between the opening regions of the first spacer structure between adjacent light-emitting parts, and thereby improving the effect of preventing lateral leakage current.

[0144] In addition to the first spacer structure, a second spacer structure in the shape of a positive cone is also provided on the embankment so that the second spacer structure has a higher height than the first spacer structure, thereby supporting the deposition mask to form a light-emitting device when the deposition mask is placed on the substrate, thereby protecting the components disposed below the second spacer structure.

[0145] Furthermore, a first spacer structure having an inverted conical shape is at least disposed between adjacent sub-pixels configured to emit light of different colors and having a threshold voltage difference between them, such that the common layer is disconnected outside the first spacer structure, thereby preventing a sub-pixel with a low threshold voltage arranged adjacent to the conducting sub-pixel from being turned on due to lateral leakage current when the sub-pixel with a high threshold voltage is selectively turned on.

[0146] Therefore, a light-emitting display device according to one embodiment of the present invention may include: a substrate comprising a plurality of first sub-pixels to third sub-pixels arranged adjacent to each other, each of the first sub-pixels to third sub-pixels including a light-emitting portion and a non-light-emitting portion configured to surround the light-emitting portion; a dam disposed in the non-light-emitting portion; a first electrode covered by the dam and disposed in the first sub-pixels to third sub-pixels respectively to expose the corresponding light-emitting portion; a first spacer structure having an inverted conical shape disposed on the dam to surround at least one side of the light-emitting portion of each of the first sub-pixels to third sub-pixels; a common layer structure located on the first electrode and the first spacer structure and interrupted at the edge of the first spacer structure; and a second electrode located on the common layer structure.

[0147] The first spacer structure corresponding to at least one of the first to third sub-pixels may have an opening region formed in a virtual closed loop, which is configured to surround the light-emitting portion of at least one of the first to third sub-pixels.

[0148] The light-emitting display device may also include a second spacer structure having a positive conical shape, which is spaced apart from the first spacer structure and configured to have a height higher than that of the first spacer structure.

[0149] The first spacer structure may include a first pattern configured to surround a light-emitting portion of a first sub-pixel, a second pattern configured to surround a light-emitting portion of a second sub-pixel, and a third pattern configured to surround a light-emitting portion of a third sub-pixel, wherein the first pattern to the third pattern may be spaced apart from each other.

[0150] The first pattern and the second pattern may each have an opening area that is set to be non-adjacent to each other.

[0151] The first spacer structure may have an opening region formed in a first pattern and an opening region formed in a second pattern between the light-emitting part of the first sub-pixel and the light-emitting part of the second sub-pixel, and may provide a connection to a third pattern between the opening regions formed in the first pattern and the second pattern to block the extension of the opening regions formed in the first pattern and the second pattern.

[0152] The first spacer structure may further include a fourth pattern, which is disposed between the first pattern and the second pattern, thereby being spaced apart from the first pattern and the second pattern.

[0153] The first spacer structure may further include, between the first pattern and the second pattern, a first protrusion configured to protrude from the first pattern to be spaced apart from the second pattern by a first distance; and a second protrusion configured to protrude from the second pattern to be spaced apart from the first pattern by a second distance.

[0154] The first spacer structure may also include a connecting portion configured to connect a third pattern between adjacent third sub-pixels.

[0155] At least one of the first to third patterns may have multiple open regions and may be divided by open regions used as boundaries.

[0156] The first and second sub-pixels can be arranged alternately in rows and columns, and the third sub-pixel can be arranged to alternate with each of the first and second sub-pixels in the diagonal direction.

[0157] The first sub-pixel can be arranged in the first axis direction, the second sub-pixel and the third sub-pixel can be arranged alternately in the first axis direction, and the first sub-pixel can be adjacent to at least one of the second sub-pixel and the third sub-pixel in the second axis direction.

[0158] The first spacer structure may include a first pattern arranged in a first axial direction between a first sub-pixel and a second sub-pixel, and a second pattern arranged between a second sub-pixel and a third sub-pixel.

[0159] At least one of the first and second patterns may have an opening region adjacent to one of the light-emitting portions of the first to third sub-pixels.

[0160] At least one of the first and second patterns may include a plurality of sub-patterns arranged parallel to each other.

[0161] Subpatterns arranged parallel to each other can have opening areas that are set to be non-adjacent to each other.

[0162] The light-emitting display device may also include a guide portion configured to connect sub-patterns arranged parallel to each other.

[0163] The first pattern and the second pattern can be connected to each other, and the contact point between the first pattern and the second pattern can be adjacent to the light-emitting part of the first sub-pixel.

[0164] The first sub-pixel may have a first light-emitting layer configured to contact a common layer structure between the first electrode and the second electrode to emit light of a first color. The second sub-pixel may have a second light-emitting layer configured to contact the common layer structure between the first electrode and the second electrode to emit light of a second color with a wavelength longer than the first color. The third sub-pixel may have a third light-emitting layer configured to contact the common layer structure between the first electrode and the second electrode to emit light of a third color with a wavelength between the wavelength of the first color and the wavelength of the second color.

[0165] The width of the first spacer structure can be smaller than the critical dimension of the light-emitting part with the smallest size among the light-emitting parts of the first to third sub-pixels.

[0166] The common layer structure may include at least one of the following: hole injection layer, hole transport layer, electron blocking layer, light emission layer, hole blocking layer, electron transport layer, electron injection layer, and charge generation layer.

[0167] Among the first to third sub-pixels, the threshold voltage of the first sub-pixel can be the highest, and the threshold voltage of the second sub-pixel can be the lowest.

[0168] Among the first to the third sub-pixels, the area of ​​the first sub-pixel can be the largest, and the area of ​​the second sub-pixel can be the smallest.

[0169] A light-emitting display device according to another embodiment of the present invention may include: a substrate comprising a plurality of light-emitting portions and non-light-emitting portions between the light-emitting portions; first electrodes disposed in the light-emitting portions; a dam portion configured to selectively overlap with the first electrodes and disposed in the non-light-emitting portions; a first spacer structure having an inverted conical shape between adjacent light-emitting portions on the dam portion, the first spacer structure being configured to have an opening region formed in a virtual closed loop, the virtual closed loop being configured to surround at least one of the light-emitting portions and at least one side of each of the light-emitting portions; a common layer structure located on the first electrodes and the first spacer structure and broken at the edge of the first spacer structure; and a second electrode located on the common layer structure.

[0170] It is evident from the above description that the light-emitting display device according to the present invention has the following effects.

[0171] First, in the light-emitting display device according to the present invention, a first spacer structure having an inverted conical shape is located on the embankment between adjacent sub-pixels, and the common layer deposited after the formation of the first spacer structure is broken at the first spacer structure having an inverted conical shape, thereby preventing lateral leakage current caused by the highly conductive common layer.

[0172] Second, the length and width of the first spacer structure with an inverted conical shape disposed on the embankment are limited, thereby preventing an increase in the thin-film resistance of a specific area of ​​the second electrode (cathode) formed after the formation of the common layer structure. Therefore, the second electrode can maintain a uniform voltage. In other words, the first spacer structure has open areas relative to at least some of the light-emitting portions, thus preventing an increase in the resistance of the second electrode.

[0173] Third, as the pixel structure of display devices becomes more diverse, the first spacer structure is not limited to a single-axis shape, but has the following shape: it surrounds the light-emitting part and includes an opening region formed in certain portions of a closed-loop pattern configured to surround the light-emitting part to further guide the flow of current, thereby increasing the distance between the opening regions of the first spacer structure between adjacent light-emitting parts, and thereby improving the effect of preventing lateral leakage current.

[0174] Fourth, in addition to the first spacer structure, a second spacer structure with a positive conical shape is also provided on the embankment so that the second spacer structure has a higher height than the first spacer structure, thereby supporting the deposition mask when the deposition mask is placed on the substrate to form a light-emitting device, thereby protecting the components disposed below the second spacer structure.

[0175] Fifth, a first spacer structure with an inverted conical structure is at least disposed between adjacent sub-pixels configured to emit light of different colors and have a threshold voltage difference between them, such that the common layer is disconnected outside the first spacer structure, thereby preventing a sub-pixel with a low threshold voltage arranged adjacent to the conducting sub-pixel from being turned on due to lateral leakage current when the sub-pixel with a high threshold voltage is selectively turned on.

[0176] It will be apparent to those skilled in the art that various modifications and variations can be made to the invention without departing from its spirit or scope. Therefore, this invention is intended to cover such modifications and variations as long as they fall within the scope of the appended claims and their equivalents.

[0177] Furthermore, the present invention can also be configured as follows.

[0178] (1). A light-emitting display device, comprising:

[0179] A substrate, the substrate comprising a plurality of first sub-pixels to third sub-pixels arranged adjacent to each other, each of the first sub-pixels to the third sub-pixels comprising a light-emitting portion and a non-light-emitting portion surrounding the light-emitting portion;

[0180] The embankment at the non-light-emitting part;

[0181] A first electrode, which is covered by the embankment and exposes the corresponding light-emitting portion at the first sub-pixel to the third sub-pixel respectively;

[0182] A first spacer structure having an inverted conical shape is configured on the embankment to surround at least one side of each of the light-emitting portions from the first sub-pixel to the third sub-pixel;

[0183] A common layer structure, wherein the common layer structure is located on the first electrode and the first spacer structure and is broken at the edge of the first spacer structure; and

[0184] The second electrode on the common layer structure.

[0185] (2). The light-emitting display device according to (1), wherein the first spacer structure corresponding to at least one of the first sub-pixels to the third sub-pixels has an opening region in a virtual closed loop of the light-emitting portion configured to surround the at least one of the first sub-pixels to the third sub-pixels.

[0186] (3). The light-emitting display device according to (1) further includes a second spacer structure having a positive conical shape, the second spacer structure being spaced apart from the first spacer structure and being configured to have a height higher than that of the first spacer structure.

[0187] (4). The light-emitting display device according to (1), wherein:

[0188] The first spacer structure includes a first pattern configured to surround a light-emitting portion of the first sub-pixel; a second pattern configured to surround a light-emitting portion of the second sub-pixel; and a third pattern configured to surround a light-emitting portion of the third sub-pixel.

[0189] The first pattern to the third pattern are spaced apart from each other.

[0190] (5). The light-emitting display device according to (4), wherein the first pattern and the second pattern each have opening regions that are configured to be non-adjacent to each other.

[0191] (6). The light-emitting display device according to (4), wherein:

[0192] The first spacer structure has an opening region formed in the first pattern and an opening region formed in the second pattern between the light-emitting portion of the first sub-pixel and the light-emitting portion of the second sub-pixel; and

[0193] An extension is provided between the opening regions formed in the first pattern and the second pattern, which is connected to the third pattern to block the extension of the opening regions formed in the first pattern and the second pattern.

[0194] (7). The light-emitting display device according to (4), wherein the first spacer structure further includes a fourth pattern spaced apart from the first pattern and the second pattern between the first pattern and the second pattern.

[0195] (8). The light-emitting display device according to (4), wherein the first spacer structure further comprises, between the first pattern and the second pattern:

[0196] A first protrusion, configured to protrude from the first pattern to be spaced apart from the second pattern by a first distance; and

[0197] A second protrusion is configured to protrude from the second pattern to be spaced a second distance from the first pattern.

[0198] (9). The light-emitting display device according to (4), wherein the first spacer structure further includes a connecting portion of the third pattern configured to connect adjacent third sub-pixels.

[0199] (10). The light-emitting display device according to (4), wherein at least one of the first to third patterns has a plurality of open regions and is divided by the open regions serving as boundaries.

[0200] (11). The light-emitting display device according to (1), wherein:

[0201] The first sub-pixel and the second sub-pixel are arranged alternately in rows and columns; and

[0202] The third sub-pixel is arranged to alternate with each of the first and second sub-pixels in a diagonal direction.

[0203] (12). The light-emitting display device according to (1), wherein:

[0204] The first sub-pixel is arranged in the first axial direction;

[0205] The second sub-pixel and the third sub-pixel are alternately arranged in the first axial direction; and

[0206] The first sub-pixel is adjacent to at least one of the second and third sub-pixels in a second axis direction that intersects with the first axis direction.

[0207] (13). The light-emitting display device according to (12), wherein the first spacer structure comprises:

[0208] A first pattern, the first pattern being arranged between the first sub-pixel and the second sub-pixel in the first axial direction; and

[0209] A second pattern is arranged between the second sub-pixel and the third sub-pixel.

[0210] (14). The light-emitting display device according to (13), wherein at least one of the first pattern and the second pattern has an opening region adjacent to one of the light-emitting portions of the first sub-pixel to the third sub-pixel.

[0211] (15). The light-emitting display device according to (13), wherein at least one of the first pattern and the second pattern comprises a plurality of sub-patterns arranged parallel to each other.

[0212] (16). The light-emitting display device according to (15), wherein the sub-patterns arranged parallel to each other have opening regions that are configured to be non-adjacent to each other.

[0213] (17). The light-emitting display device according to (15) further includes a guide portion configured to connect the sub-patterns arranged parallel to each other.

[0214] (18). The light-emitting display device according to (13), wherein the first pattern and the second pattern are connected to each other, and at least one contact point between the first pattern and the second pattern is adjacent to at least one light-emitting portion of the first sub-pixel.

[0215] (19). The light-emitting display device according to (1), wherein:

[0216] The first sub-pixel has a first light-emitting layer, which is in contact with the common layer structure between the first electrode and the second electrode, thereby emitting light of a first color.

[0217] The second sub-pixel has a second light-emitting layer that contacts the common layer structure between the first electrode and the second electrode, thereby emitting light of a second color with a wavelength longer than that of the first color; and

[0218] The third sub-pixel has a third light-emitting layer that is in contact with the common layer structure between the first electrode and the second electrode, thereby emitting light of a third color, the wavelength of which is between the wavelength of the first color and the wavelength of the second color.

[0219] (20). The light-emitting display device according to (1), wherein the width of the first spacer structure is smaller than the critical dimension of the light-emitting portion with the smallest size among the light-emitting portions of the first sub-pixel to the third sub-pixel.

Claims

1. A light-emitting display device, comprising: A substrate comprising multiple sub-pixels; The first electrode at each of the plurality of sub-pixels; The embankment that exposes the first electrode at each of the plurality of sub-pixels; The first spacer structure on the embankment; A second spacer structure on the embankment that is spaced apart from the first spacer structure; A common layer on the first electrode, the embankment, the first spacer structure, and the second spacer structure; as well as The second electrode on the common layer, The second electrode is disposed on at least one side surface of the common layer above the first spacer structure and at least one side of the first spacer structure. The first spacer structure includes a pattern surrounding each of the plurality of sub-pixels, and the pattern includes at least one opening region. The first spacer structure further includes an extension to connect the pattern surrounding the adjacent sub-pixels between adjacent sub-pixels, and The second spacer structure is adjacent to the at least one opening region.

2. The light-emitting display device according to claim 1, in, The plurality of sub-pixels includes a plurality of first sub-pixels for emitting a first color, a plurality of second sub-pixels for emitting a second color with a wavelength longer than that of the first color, and a plurality of third sub-pixels for emitting a third color with a wavelength between that of the first color and that of the second color. The extension portion is disposed at least between the third sub-pixels.

3. The light-emitting display device according to claim 2, wherein, The second spacer structure is disposed between adjacent third sub-pixels.

4. The light-emitting display device according to claim 2, wherein, The pattern of the first spacer structure is set at least relative to the plurality of third sub-pixels, and the pattern surrounds all sides of the light-emitting portion of the plurality of third sub-pixels.

5. The light-emitting display device according to claim 1, wherein, The plurality of sub-pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel for emitting different colors, and The pattern of the first spacer structure includes a first pattern surrounding the first sub-pixel, a second pattern surrounding the second sub-pixel, and a third pattern surrounding the third sub-pixel. Each of the first pattern, the second pattern, and the third pattern has at least one open area.

6. The light-emitting display device according to claim 5, wherein, The extension extends from the third pattern and is parallel to the first pattern between the first sub-pixel and the second sub-pixel.

7. The light-emitting display device according to claim 6, wherein, The extension is disposed between the first pattern and the second pattern.

8. The light-emitting display device according to claim 5, wherein, The at least one opening region of the first pattern and the at least one opening region of the second pattern are positioned along a first direction.

9. The light-emitting display device according to claim 1, wherein, The width of the second spacer structure is greater than the width of the first spacer structure, and the height of the second spacer structure is greater than the height of the first spacer structure.

10. The light-emitting display device according to claim 1, wherein, The first spacer structure and the second spacer are made of different materials.

11. The light-emitting display device according to claim 1, wherein, In the cross-sectional view, the width of the first spacer structure decreases in the direction toward the substrate, and the width of the second spacer structure increases in the same direction toward the substrate.

12. The light-emitting display device according to claim 1, in, The plurality of sub-pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel for emitting different colors, and Each of the first sub-pixel, the second sub-pixel, and the third sub-pixel has a polygonal light-emitting portion.

13. The light-emitting display device according to claim 12, wherein, The light-emitting portions of the first sub-pixel, the second sub-pixel, and the third sub-pixel each have different shapes.

14. The light-emitting display device according to claim 1, further comprising an encapsulation layer on the second electrode, in, The thickness of the encapsulation layer on at least one side of the first spacer structure is thinner than the thickness of the encapsulation layer on the upper surface of the first spacer structure.

15. The light-emitting display device according to claim 1, wherein, The first electrode partially overlaps with the second spacer structure.

16. The light-emitting display device according to claim 2, wherein: The first sub-pixel has a first light-emitting layer to contact the common layer between the first electrode and the second electrode, thereby emitting light having the first color; The second sub-pixel has a second light-emitting layer to contact the common layer between the first electrode and the second electrode, thereby emitting light having the second color; as well as The third sub-pixel has a third light-emitting layer to contact the common layer between the first electrode and the second electrode, thereby emitting light having the third color.

17. The light-emitting display device according to claim 12, wherein, The width of the first spacer structure is less than the width of the smallest light-emitting part among the light-emitting parts of the first sub-pixel, the second sub-pixel, and the third sub-pixel.

18. The light-emitting display device according to claim 1, wherein, The common layer includes at least one of the following: hole injection layer, hole transport layer, electron blocking layer, light emission layer, hole blocking layer, electron transport layer, electron injection layer, and charge generation layer.

19. The light-emitting display device according to claim 12, wherein, Among the first sub-pixel, the second sub-pixel, and the third sub-pixel, the first sub-pixel has the highest threshold voltage.

20. The light-emitting display device according to claim 12, wherein: The first sub-pixel and the second sub-pixel are arranged alternately in rows and columns; and The third sub-pixel is arranged to alternate with each of the first and second sub-pixels in a diagonal direction.

21. The light-emitting display device according to claim 12, in, The first spacer structure further includes a fourth pattern independent of each of the first pattern, the second pattern, and the third pattern.

22. The light-emitting display device according to claim 1, wherein, Each of the at least one opening region is shorter than the length of one side of each of the plurality of sub-pixels' light-emitting portions.

Images