Illuminated display device

Abstract

A light-emitting display device capable of preventing lateral leakage current is disclosed. The 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 surrounding the light-emitting portion; a dam at the non-light-emitting portion; a first electrode covered by the dam and exposing a corresponding light-emitting portion at each of the first to third sub-pixels; a first spacer structure having an inverted conical shape on the dam and configured to surround at least one side of each of the light-emitting portions 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 on the common layer structure.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2020-0078445, filed on June 26, 2020, which is hereby incorporated by reference herein as if fully set forth in this document. TECHNICAL FIELD

[0002] The present application relates to a light emitting display device, and more particularly, to a light emitting display device that can prevent lateral leakage current between adjacent sub-pixels using a structure provided on a bank. BACKGROUND

[0003] Recently, display devices have been developed in various types to meet requirements such as flexibility, miniaturization, maximization, etc.

[0004] Among these display devices, a light emitting display device including light emitting devices respectively provided in a plurality of pixels or sub-pixels provided on a substrate and thereby omitting an external light source to achieve slimness is considered as a competitive application.

[0005] The light emitting display device includes a plurality of layers in each of the light emitting devices, and in this case, in order to avoid the use of a fine metal mask, the light emitting display device has a common layer commonly formed in each pixel or sub-pixel.

[0006] Due to the common layer commonly provided in the pixels or sub-pixels, current can flow to an adjacent pixel or sub-pixel through the common layer extending in two dimensions. Such current is called lateral leakage current. SUMMARY

[0007] Accordingly, the present application relates to a light emitting display device that can prevent lateral leakage current using a structure provided on a bank.

[0008] An object of the present application is to provide a light emitting display device that can define a structure for dividing a common layer into regions corresponding to sub-pixels using a structure provided on a bank without using a separate mask, and thereby can prevent lateral leakage current between adjacent sub-pixels.

[0009] Additional advantages, objects, and features of the application will be set forth in part by the description that follows and will become apparent to those skilled in the art upon reading the following description, or can be learned by practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

[0010] To achieve these objects and other advantages and in accordance with the purpose of the application, as embodied and broadly described herein, a light emitting display apparatus includes a substrate including 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 part and a non-light emitting part configured to surround the light emitting part; first electrodes covered by a bank and respectively provided in the first to third sub-pixels to expose the corresponding light emitting parts; a first spacer structure having an inverse taper shape on the bank configured to surround at least one side of each of the light emitting parts of the first to third sub-pixels; a common layer structure on the first electrodes and the first spacer structure and broken at edges of the first spacer structure; and a second electrode on the common layer structure.

[0011] In another aspect of the present application, a light emitting display apparatus includes a substrate including a plurality of light emitting parts and non-light emitting parts between the light emitting parts; first electrodes respectively provided in the light emitting parts; a bank configured to selectively overlap with the first electrodes and provided in the non-light emitting parts; a first spacer structure having an inverse taper shape on the bank between adjacent light emitting parts, the first spacer structure configured to have an open area formed in a virtual closed loop configured to surround at least one of the light emitting parts and at least one side of each of the light emitting parts; a common layer structure on the first electrodes and the first spacer structure and broken at edges of the first spacer structure; and a second electrode on the common layer structure.

[0012] It is to be understood that both the foregoing general description and the following detailed description of the present application are exemplary and explanatory and are intended to provide further explanation of the application as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0014] Figure 1 is a plan view showing a light emitting display apparatus according to a first embodiment of the present application;

[0015] Figure 2 is a cross-sectional view taken along line I-I' of Figure 1

[0016] Figure 3 is a cross-sectional view taken along line II-II' of Figure 1

[0017] Figure 4 is a cross-sectional view taken along line III-III' of Figure 1 ​​is a cross-sectional view taken along line III-III' of FIG. 1;

[0018] Figure 5 is a plan view showing a light-emitting display device according to a second embodiment of the present application;

[0019] Figure 6 is a plan view showing a light-emitting display device according to a third embodiment of the present application;

[0020] Figure 7 is a plan view showing a light-emitting display device according to a fourth embodiment of the present application;

[0021] Figure 8 is a plan view showing a light-emitting display device according to a fifth embodiment of the present application;

[0022] Figures 9A-9E is a plan view showing a light-emitting display device according to sixth to tenth embodiments of the present application;

[0023] Figures 10A-10H is a plan view showing a light-emitting display device according to eleventh to eighteenth embodiments of the present application;

[0024] Figure 11 is a plan view showing a light-emitting display device according to a nineteenth embodiment of the present application;

[0025] Figure 12A and Figure 12B are optical images of a light-emitting display device according to a first embodiment of the present application and a light-emitting display device according to Example 1 at the time of emission of blue light at a low gray scale; and

[0026] Figure 13 is an SEM image presenting a first spacer structure having an inverted conical shape after formation of a first encapsulation layer and elements around the same in a light-emitting display device according to the present application. DETAILED DESCRIPTION

[0027] Reference will now be made in detail embodiments of the application, examples of which are illustrated in the accompanying drawings. In the following description of embodiments and drawings, like or similar elements are referred to by like or similar reference numbers throughout the description. In the following description of embodiments of the present application, detailed description of known functions and configurations incorporated herein will be omitted when it can make the subject matter of the present application unclear. In addition, the names of elements used in the following description of embodiments of the present application are selected in consideration of easiness of preparation of the specification, and thus can be different from the names of parts of actual products.

[0028] The shapes, sizes, ratios, angles, and numbers of the elements given in the drawings for describing the embodiments of the present application are merely exemplary and thus the present application is not limited to the details shown. In the following description of the embodiments, the terms "comprise", "include" and "have" should be construed to imply the existence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, stated in the description, and not to preclude the existence of or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, unless the terms "only" are used in the term. It will be understood that the singular expression of an element includes the plural expression unless otherwise stated.

[0029] In explaining the elements included in the various embodiments of the present application, it should be construed that the elements include an error range unless otherwise stated.

[0030] In the following description of the embodiments, it will be understood that when expressing a positional relationship, for example, when an element is referred to as being "on", "above", "below", or "next to" another element, the two elements can be in direct contact with each other, or one or more other elements can be interposed between the two elements unless the term "only" or "directly" is used.

[0031] In the following description of the embodiments, it will be understood that when the terms "first", "second", and the like are used to describe various elements, these terms are used only to distinguish the same or similar elements. Thus, the first element described below can be referred to as a second element without departing from the technical scope of the present application.

[0032] The various features of the various embodiments of the present application can be partially or wholly coupled or combined with each other, and can be associated or driven in various technical ways, and the various embodiments can be implemented independently of each other or together through a connection between them.

[0033] Figure 1 is a plan view showing a light emitting display device according to a first embodiment of the present application. Figure 2 is a cross-sectional view taken along the line I-I' of Figure 1 is a cross-sectional view taken along the line II-II' of Figure 3 is a cross-sectional view taken along the line III-III' of Figure 1 is a cross-sectional view taken along the line III-III' of Figure 4 is a cross-sectional view taken along the line III-III' of Figure 1 is a cross-sectional view taken along the line III-III' of

[0034] As Figures 1-4As shown, the light emitting display device according to the first embodiment of the present application includes a substrate 100 including a plurality of first to third sub-pixels SP1, SP2 and SP3 arranged adjacent to each other, each of the first to third sub-pixels SP1, SP2 and SP3 including a light emitting part B, R or G and a non-light emitting part NE configured to surround the light emitting part B, R or G, a bank part 150 disposed in the non-light emitting part NE, first electrodes 110a, 110b and 110c covered by the bank part 150 and disposed in the first to third sub-pixels SP1, SP2 and SP3, respectively, to expose the corresponding light emitting parts B, R and G, and first spacer structures 160a, 160b and 160c having an inverted taper shape on the bank part 150 configured to surround at least one side of the corresponding one of the light emitting parts B, R and G of the first to third sub-pixels SP1, SP2 and SP3.

[0035] Further, in the light emitting display device according to the present application, a light emitting device is provided in each of the sub-pixels SP1, SP2 and SP3, each of the light emitting devices including a first electrode 110a, 110b or 110c, a second electrode 180 disposed opposite to the first electrode 110a, 110b or 110c, and an organic stack part 121, 122a, 122b and 123 filling a space between the first electrode 110a, 110b or 110c and the second electrode 180. The light emitting device including a light emitting layer 122a or 122b formed of an organic light emitting material can be referred to as an organic light emitting device, the light emitting device including a light emitting layer 122a or 122b formed of a quantum dot material can be referred to as a quantum dot light emitting device, and the light emitting device including a light emitting layer 122a or 122b formed of a mixture of an organic material and an inorganic material can be referred to as a hybrid light emitting device. However, the light emitting device of the light emitting display device according to the present application is not limited in terms of its material. The light emitting display device according to the present application 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 a self-light emitting device having various structures, as long as the first spacer structures 160: 160a, 160b and 160c can separate the common layers 121 and 123 into regions to prevent or limit a lateral leakage current between adjacent sub-pixels.

[0036] The first common layer 121 and the second common layer 123 can be formed along upper surfaces of the first spacer structures 160: 160a, 160b and 160c and upper surfaces of the first electrodes 110a, 110b and 110c and upper and side surfaces of the bank part 150 exposed outside the first spacer structures 160: 160a, 160b and 160c.

[0037] Further, the second electrode 180 can be formed on the second common layer 123. The second electrode 180 including a metal material has a relatively good step coverage, and thus can be formed not only on an upper portion of the second common layer 123 but also on a side portion of the second common layer 123.

[0038] Figure 1 One arrangement of the sub-pixels SP1, SP2, and SP3 of the light emitting display apparatus according to the first embodiment of the present application is illustrated, and in this case, the first sub-pixels SP1 and the second sub-pixels SP2 can be arranged in rows and columns alternately, and the third sub-pixels SP3 can be arranged to alternate with each of the first sub-pixels SP1 and the second sub-pixels SP2 in a diagonal direction. In more detail, referring to Figure 1 , the first sub-pixels SP1 and the third sub-pixels SP3 are alternately arranged on a first diagonal line from the upper left to the lower right, and the second sub-pixels SP2 and the third sub-pixels SP3 are alternately arranged on a second diagonal line parallel to the first diagonal line. A group of one first sub-pixel SP1, one second sub-pixel SP2, and two third sub-pixels SP3 in a rhombus region form one pixel.

[0039] The first spacer structure 160 corresponding to at least one of the first to third sub-pixels SP1, SP2, and SP3 can have an open region 1600A, 1600B, or 1600C formed in a virtual closed loop configured to surround a 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 of the first to third sub-pixels SP1, SP2, and SP3 is illustrated as having the open region 1600A, 1600B, or 1600C adjacent to the corresponding light emitting portions B, R, and G, but the present disclosure is not limited thereto, and the first spacer structure 160 corresponding to one of the first to third sub-pixels SP1, SP2, and SP3 can have an open region, or the first spacer structure 160 corresponding to two of the first to third sub-pixels SP1, SP2, and SP3 can have an open region.

[0040] The present application is characterized in that the first spacer structures 160: 160a, 160b, and 160c having an inverted taper shape are located on the bank 150 between the adjacent sub-pixels SP1, SP2, and SP3, so 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 sidewalls of the first spacer structures 160: 160a, 160b, and 160c having an inverted taper shape. Thereby, even if the common layer has high conductivity, the leakage current flowing through the common layer to the adjacent sub-pixel can be prevented. In particular, since the first spacer structures 160: 160a, 160b, and 160c are provided, a separate deposition mask configured to divide the common layers 121 and 123 into regions corresponding to the sub-pixels SP1, SP2, and SP3 can not be used in forming the common layers 121 and 123. Because, as seen from 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 material forming the common layers 121 and 123 does not accumulate on the region of the bank 150 below the upper side of the first spacer structure 160, and thus, the common layers 121 and 123 can be structurally divided into a region corresponding to the first spacer structure 160 and a region as a boundary corresponding to the surrounding portion of the first spacer structure 160. That is, even if a 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 with respect to the bank 150, the common layers 121 and 123 are not formed in the space because the upper side of the first spacer structure 160 serves as a screen. The common layer structure including the common layers 121 and 123 is formed by supplying the vaporized organic material to the upper surface of the substrate 100 from a supply source provided above the substrate 100. Since the vaporized organic material is deposited with straightness, 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 bank 150, but it is difficult to be uniformly and continuously formed on the region of the bank 150 covered by the upper surface of the first spacer structure 160, and thus the common layers 121 and 123 are structurally divided by the first spacer structure 160.

[0041] As Figure 1As illustrated, in the light-emitting display device according to the first embodiment of the present application, 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 can 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.

[0042] The first pattern 160b disposed around the light-emitting portion B of the first sub-pixel SP1 exhibits the following effects. To drive the first sub-pixel SP1, the first sub-pixel SP1 is turned on by applying a voltage equal to or higher than a threshold voltage Vth of the first sub-pixel SP1 thereto, and in this case, as Figures 2-4 As illustrated, the common layers 121 and 123 are broken at the edges of the first pattern 160b, and thus, the current horizontally leaked from the first sub-pixel SP1 to the adjacent sub-pixels is little or none, and the second sub-pixel SP2 and the third sub-pixel SP3 having a lower threshold voltage are not turned on by the leaked current. The second pattern 160a structurally separates the first common layer 121 and the second common layer 123, and thus, it is possible to prevent the second sub-pixel SP2 having a lower threshold voltage than the first sub-pixel SP1 and the third sub-pixel SP3 from being affected by the turn-on of the adjacent first sub-pixel SP1 and third sub-pixel SP3. The third pattern 160c structurally separates the first common layer 121 and the second common layer 123, and thus, it is possible to prevent the third sub-pixel SP3 having a lower threshold voltage than the first sub-pixel SP1 from being affected by the turn-on of the adjacent first sub-pixel SP1.

[0043] The threshold voltages of the first to third sub-pixels SP1, SP2, and SP3 are the minimum voltages required to drive thin film transistors (not illustrated) connected to the respective first electrodes 110a, 110b, and 110c. Although Figures 2-4 The thin film transistors are not illustrated, but thin film transistors each including a semiconductor layer, a gate electrode, a source electrode, and a drain electrode can be disposed between the substrate 100 and the first electrodes 110a, 110b, and 110c.

[0044] The 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 certain direction. The second sub-pixel 180 is commonly provided in the sub-pixels SP1, SP2, and SP3, and is formed without using a mask or using an opening mask configured to cover only the non-active region outside the sub-pixels SP1, SP2, and SP3. The second electrode 180 is formed on the second common layer 123, includes metal to have good step coverage compared to the organic material forming the common layers 121 and 123, and thus the second electrode 180 can be formed not only on the upper portion of the second common layer 123 but also on the side portion of the first common layer 121 and the second common layer 123. However, as the angle of the side portion of the first spacer structure 160 with the surface of the bank 150 decreases, a region in which the second electrode 180 is not formed can occur on the side portion of the first spacer structure 160. Even if the second electrode 180 is not formed on a portion of the side portion of the first spacer structure 160, the light emitting display apparatus according to the present application can prevent an increase in the resistance of the second electrode 180 in a certain line direction through the opening regions 1600A and 1600B in the horizontal direction and the opening region 1600C in the vertical direction.

[0045] The width of the first spacer structure 160 is smaller than the critical dimension CD of the light emitting part having the smallest size among the light emitting parts B, R, and G of the sub-pixels SP1, SP2, and SP3. Also, the width of the first spacer structure 160 is narrow so that even if a plurality of patterns are arranged between the adjacent light emitting parts B, R, and G, the patterns can be spaced apart from each other, and the length of the first spacer structure 160 can be greater than the length of at least one side of each of the light emitting parts B, R, and G. The respective patterns 160b, 160a, and 160c forming the first spacer structure 160 are separated from each other to be distinguished from each other, and are disposed around the light emitting parts B, R, and G so that the length thereof is greater than the width thereof to prevent lateral leakage current from the adjacent sub-pixels SP1, SP2, and SP3. In the first embodiment, the third pattern 160c has an extension between the adjacent opening regions 1600A and 1600B of the first pattern 160b and the second pattern 160a, thereby being able to effectively prevent the 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 having the greatest threshold voltage difference. The extension is located between the light emitting parts G of the adjacent third sub-pixel SP3 in the vertical direction, and thus can connect the third patterns 160c surrounding the respective light emitting parts G. In this case, when the first sub-pixel SP1 emits light, the current path flowing in 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 directly flowing in the first sub-pixel SP1 to the adjacent second sub-pixel SP2 in the same column is also blocked, and thus the current flowing in the first sub-pixel SP1 bypasses the adjacent second sub-pixel SP2 along the side portion of the third pattern 160c, the current path is elongated, and thus the turn-on of the second sub-pixel SP2 due to the lateral leakage current can be prevented.

[0046] Here, the opening region 1600c of the third pattern 160c surrounding the light emitting part G of one third sub-pixel SP3 can be located on a different horizontal line.

[0047] Also, in the light emitting display device according to the present application, the length and the width of the first spacer structure 160 having an inverted taper shape disposed on the bank 150 are limited, thereby preventing an increase in the sheet resistance of a specific region of the second electrode 180 formed after the formation of the common layers 121 and 123. Thus, the second electrode 180 can maintain a uniform voltage in each region thereof. That is, the first spacer structure 160 has the opening regions 1600A, 1600B, and 1600C for some of the light emitting parts B, R, and G, thereby being able to prevent an increase in the resistance of the second electrode 180 in a specific direction.

[0048] In Figure 1In the illustrated arrangement, 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 sub-pixel SP1 and the second sub-pixel SP2 have an octagonal shape, and the light emitting portion G of the third sub-pixel SP3 has a rectangular shape extending in a diagonal direction and having a rounded corner. Further, the drawing illustrates that the third sub-pixel SP3 is arranged at a density twice that of the first sub-pixel SP1 and the second sub-pixel SP2. This arrangement is only one example, and the light emitting display device according to the present application proposes a method for more effectively addressing the lateral leakage current in an arrangement structure in which sub-pixels are arranged in a non-bar type. The following embodiments will propose different arrangement structures. As described below, even in these different sub-pixel arrangement structures, the first spacer structure 160 having an inverted taper shape can be arranged adjacent to the light emitting portion to prevent the lateral leakage current between the light emitting portions of adjacent sub-pixels.

[0049] In the description of the present application, the "inverted taper shape" is a shape in which, when viewed from a cross section thereof, the upper side of the first spacer structure 160: 160a, 160b, and 160c has a length greater than that of the lower side of the first spacer structure 160: 160a, 160b, and 160c, and thus the side portion of the first spacer structure 160 forms an acute angle with the surface of the bank 150 disposed outside the first spacer structure 160. In contrast, as illustrated, the second spacer structure 170 having a positive taper shape opposite to the inverted taper shape is provided, and the "positive taper shape" is a shape in which, when viewed from a cross section thereof, the upper side of the second spacer structure 170 has a length smaller than that of the lower side of the second spacer structure 170, and thus the side portion of the second spacer structure 170 forms an obtuse angle with the surface of the bank 150 disposed outside the second spacer structure 170. Figure 2

[0050] The second spacer structure 170 is formed in a shape having a width and a height greater than those of the first spacer structure 160: 160a, 160b, and 160c. The second spacer structure 170 mainly contacts a deposition mask (not shown) used when depositing an organic material on the substrate 100 using the deposition mask to support the deposition mask, thereby protecting lower elements such as the bank 150 and the first spacer structure 160: 160a, 160b, and 160c. The second spacer structure 170 can be formed on the bank 150 to be spaced apart from the first spacer structure 160: 160a, 160b, and 160c. Since the second spacer structure 170 must support the deposition mask uniformly over the entire substrate 100, the second spacer structure 170 can be arranged in each of the sub-pixels SP1, SP2, and SP3 to have a specified width (area).

[0051] ​The bank 150, the first spacer structure 160, and the second spacer structure 170 can be formed of an organic insulating material such as photoacrylic acid, polyimide, and / or polyamide, and the bank 150, the first spacer structure 160, and the second spacer structure 170 can include the same organic insulating material, or at least one of the bank 150, the first spacer structure 160, and the second spacer structure 170 can include a different organic insulating material. Furthermore, in order to form different heights and different tapered shapes, the bank 150, the first spacer structure 160, and the second spacer structure 170 can be formed by different processes, or the bank 150 and the second spacer structure 170 can be first formed of the same organic material using a half-tone mask, and then the first spacer structure 160 can be formed of a different organic material in a region spaced apart from the second spacer structure 170.

[0052] In the light emitting display device according to the first embodiment of the present application, in order to control the lateral leakage current, the first spacer structures 160: 160a, 160b, and 160c are not limited to a uniaxial shape in a plan view, but have a shape surrounding the light emitting parts B, R, and G, and include the open regions 1600A, 1600B, and 1600C in a virtual closed loop configured to surround the light emitting parts B, R, and G. Furthermore, as shown in FIG. 1, the first sub-pixel SP1 and the second sub-pixel SP2 are alternately arranged in a row such that the open 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, thereby being able to prevent the leakage current between the first sub-pixel SP1 and the second sub-pixel SP2 on the horizontal line passing through the open regions 1600A and 1600B due to the presence of the third pattern 160c between the open regions 1600A and 1600B. Figure 1

[0053] In some cases, the open region 1600A of the first pattern 160b and the open region 1600B of the second pattern 160a can be located on different horizontal lines to lengthen the path of the leakage current flowing on the horizontal line.

[0054] The first electrodes 110a, 110b, and 110c can have protrusions protruding outward from the respective light emitting parts B, R, and G, and the protrusions can be connected to corresponding thin film transistors (not shown).

[0055] ​The common layers 121 and 123 of the common structure are formed collectively without distinguishing the sub-pixels SP1, SP2, and SP3. That is, the common layers 121 and 123 can be formed on the substrate 100 without using any mask, or can be formed on the substrate 100 using a common mask that covers non-active areas outside the sub-pixels SP1, SP2, and SP3 while leaving all the sub-pixels SP1, SP2, and SP3 on the substrate 100 open. Thus, the use of a fine metal mask having openings finely adjusted to correspond to light emitting portions of each sub-pixel or specific sub-pixels is reduced, so that the equipment burden can be significantly reduced, and it is not necessary to align each common layer with each other, so that the yield can be significantly improved.

[0056] The common layer structure including the common layers 121 and 123 can include, for example, an organic stack for forming a light emitting device. The organic stack can 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 the first electrodes 110a, 110b, or 110c, the second electrode 180, and the organic stack between the first electrodes 110a, 110b, or 110c and the second electrode 180.

[0057] Figures 2-4 The illustrated example shows the first electrodes 110a and 110b and the second electrode 180, and the first common layer 121, the light emitting layers 122a and 122b, and the second common layer 123, which are sequentially deposited in the upward direction on the substrate 100 in the first sub-pixel SP1 and the second sub-pixel SP2. Although not shown in these drawings, the third sub-pixel SP3 can have the same layer structure as the first sub-pixel SP1 and the second sub-pixel SP2.

[0058] Although the illustrated example shows the first common layer 121 disposed as a single layer under the light emitting layers 122a and 122b, and the second common layer 123 disposed as a single layer on the light emitting layers 122a and 122b, the present disclosure is not limited thereto, and the first common layer 121 can include different layers, such as a hole injection layer, a hole transport layer, and an electron blocking layer, and the second common layer 123 can include different layers, such as a hole blocking layer and an electron transport layer. In addition, although the illustrated example shows the light emitting layers 122a and 122b disposed as single layers in the first sub-pixel SP1 and the second sub-pixel SP2, a plurality of stacks separated from each other by a charge generation layer can be disposed between the first electrodes 110a, 110b, and 110c and the second electrode 180. Here, each "stack" refers to a configuration substantially including a hole transport layer, a light emitting layer, and an electron transport layer.

[0059] Figure 2 andFigure 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.

[0060] although Figures 2-4 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.

[0061] 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.

[0062] Although the illustrated example of the light emitting display apparatus according to the present application indicates 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, a sub-pixel configured to emit white light or light having other colors different from the first to third colors can be provided.

[0063] Organic light emitting materials for various colors require different threshold voltages, and among currently known blue, green, and red organic light emitting materials, the threshold voltage of the blue organic light emitting material is the highest, and the threshold voltage of the red organic light emitting material is the lowest. Therefore, in a light emitting display apparatus 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 at a threshold voltage lower than the threshold voltage of the blue sub-pixel can be turned on, and in this case, among the red and green sub-pixels, the red sub-pixel driven at a lower threshold voltage can be more affected by the turning on 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 apparatus according to the present application, the first spacer structure 160 can be formed so as to allocate a weight between the blue sub-pixel and the red sub-pixel among the red and green sub-pixels adjacent to the blue sub-pixel.

[0064] Figure 1 It is shown that in Figure 1 Among 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 light emitted by the largest or smallest sub-pixel can vary depending on the application to which the light emitting display apparatus is applied.

[0065] In the light emitting display apparatus according to the present application, as described above, the common layer structure including the first common layer 121 and the second common layer 123 is structurally divided into a region on the first spacer structure 160 and a region around the first spacer structure 160 without a fine metal mask, and since the organic material of the common layers 121 and 123 having high straightness is deposited, the first common layer 121 and the second common layer 123 are not formed on the inverted tapered side surface of the first spacer structure 160, and are thus divided into regions corresponding to adjacent sub-pixels.

[0066] The second electrode 180 formed after the second common layer 123 is formed of a transparent or a transreflective member or an opaque metallic member. The second electrode 180 having a metallic member has a good step coverage compared to the first common layer 121 and the second common layer 123 having an organic material. 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 side portions of the first common layer 121 and the second common layer 123 formed on the bank 150.

[0067] In the light emitting display device according to the present application, 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 formed between the first electrode 110a, 110b, or 110c and the second electrode 180. The organic stack includes a light emitting layer, and when the thicknesses of the organic stacks of the respective subpixels 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. To prevent a lateral leakage current due to the first spacer structure 160, Figures 2-4 The width of the lower side of the first spacer structure 160 shown can be 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 times to 10 times the width of the lower side of the first spacer 170, and the height of the second spacer structure 170 can be equal to or less than 5 μm.

[0068] Although not shown in the drawings, a cover layer (not shown) can also be provided on the second electrode 180 to improve the light emitting efficiency, and a packaging layer formed of at least one pair of inorganic and organic films or a packaging substrate alternately can also be provided on the cover layer to protect the light emitting device from the surrounding air and block moisture. When the packaging layer is applied, the packaging layer enters the side portions of the first spacer structure 160 and the second spacer structure 170 on the bank 150, and at least the organic film of the packaging layer has a thickness equal to or greater than the sum of the thickness of the bank 150 and the height of the second spacer structure 170, and thus the upper surface of the packaging layer flattens the entire area of the light emitting display device including the subpixels.

[0069] Figure 5 is a plan view showing a light emitting display device according to a second embodiment of the present application.

[0070] As 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.

[0071] Figure 6 This is a plan view showing a light-emitting display device according to a third embodiment of the present invention.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] That is, even in this case, the first to third patterns 160b, 160e, and 160d are configured to surround the corresponding light emitting portions B, R, and G, and thus in the same manner as the first embodiment, the following effect can be presented: when a certain sub-pixel is turned on, the flow of current from the corresponding sub-pixel to the light emitting portion of the adjacent sub-pixel is blocked.

[0076] Further, in the light emitting display device according to the third embodiment of the present application, as shown in FIG. 17, since the first sub-opening region 1600E is additionally provided, the space between the first sub-pixel SP1 and the second sub-pixel SP2 adjacent to each other in the vertical direction on the bank portion 150 is increased, and thus the region margin for arranging the second spacer structure 170 between the first sub-pixel SP1 and the second sub-pixel SP2 adjacent to each other in the vertical direction can be ensured. Figure 6

[0077] Figure 7 is a plan view showing a light emitting display device according to the fourth embodiment of the present application.

[0078] As shown in FIG. 18, in the light emitting display device according to the fourth embodiment of the present application, in the first spacer structure 160C, the first pattern 160g configured to surround the light emitting portion B of the first sub-pixel SP1 is divided into four parts, and thereby has the first opening region 1600A symmetrical to each other in the horizontal direction and the second sub-opening region 1600G symmetrical to each other in the vertical direction in the same manner as the second pattern 160e, and compared with the third embodiment, the fourth opening region 1600F is further formed in the extension of the third pattern 160f configured to surround the light emitting portion G of the adjacent third sub-pixel SP3. Figure 7

[0079] ​​Because the distance between the light emitting portions B and R of the first and second sub-pixels SP1 and SP2 adjacent to each other in the vertical direction is long, the flow path of the leakage current is long, and thus the influence of the leakage current can be reduced. Because 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 and second sub-pixels SP1 and SP2 adjacent to each other in the horizontal direction, some leakage current can be generated in the horizontal direction compared to the first to third embodiments, but the fourth opening region 1600F is located at a position different from the positions of the first and second opening regions 1600A and 1600B in the vertical direction, thereby enabling a bypass of the leakage current to be generated in the horizontal direction. In another way, the continuous distance between the first opening region 1600A, the fourth opening region 1600F, and the second opening region 1600B continuously positioned in the length direction of the horizontal or vertical or diagonal direction can be reduced to minimize the width of the path of the leakage current in the length direction.

[0080] Further, as Figure 7 indicated, the light emitting display device according to the fourth embodiment of the present application 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.

[0081] Figure 8 is a plan view showing a light emitting display device according to a fifth embodiment of the present application.

[0082] As Figure 8 indicated, in the light emitting display device according to the fifth embodiment of the present application, the first spacer structure 160D further includes a fourth pattern 160h of a bar shape between the first and second sub-pixels SP1 and SP2 adjacent to each other in the vertical direction compared to the fourth embodiment. In this case, the fourth pattern 160h can be provided in an island type, and although this shows two fourth patterns 160h provided between the first and second sub-pixels SP1 and SP2 adjacent to each other, one fourth pattern 160h can be provided or three or more fourth patterns 160h can be provided to increase the arrangement density.

[0083] Figure 8 The light emitting display device according to the fifth embodiment shown in

[0084] Hereinafter, other modified embodiments will be described.

[0085] Figures 9A-9Eis a plan view showing a light emitting display device according to the sixth to tenth embodiments of the present application.

[0086] As Figure 9A shown, in the light emitting display device according to the sixth embodiment of the present application, the first spacer structure 260A includes a first pattern 260b configured to surround the light emitting part B of the first sub-pixel SP1, a second pattern 260a configured to surround the light emitting part R of the second sub-pixel SP2, and a third pattern 260c and 260d configured to surround the light emitting part G of the third sub-pixel SP3.

[0087] Here, the first pattern 260b and the second pattern 260a include a first opening region 2600A and a second opening region 2600B which are not on the same horizontal line. Thereby, it is possible to increase the effect of preventing the leakage current in the horizontal direction.

[0088] Further, the third pattern 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 can have a third opening region 2600C between the first sub-pattern 260c and the second sub-pattern 260d adjacent to the light emitting part G in the vertical direction. In this case, the two third opening regions 2600C located at the left and right sides of the light emitting part G can be provided on different horizontal lines. Further, the first sub-pattern 260c and the second sub-pattern 260d have a curved shape extending in the outward direction of the light emitting part G. Further, the first sub-pattern 260c and the second sub-pattern 260d can have a fourth opening region 2600D outside the light emitting part G, and, in this case, the two third opening regions 2600D located at the left and right sides of the light emitting part G can also be provided on different horizontal lines.

[0089] 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 adjacent to each other in the horizontal direction, thereby forming a zigzag-shaped path of the leakage current, and thus it is possible to increase the path length of the leakage current when a certain sub-pixel is turned on, thereby minimizing the generation of the lateral leakage current.

[0090] As Figure 9BAs shown, in the light emitting display device according to the seventh embodiment of the present application, the first spacer structure 260B includes first to third patterns 260f, 260e and 260g configured to surround respective light emitting portions B, R and G of the first to third sub-pixels SP1, SP2 and SP3, the first pattern 260f has a fifth open area 2600E, the second pattern 260e has a sixth open area 2600F, and the third pattern 260g has a seventh open area 2600G.

[0091] In this case, when the distance between the light emitting portions B, R and G of the sub-pixels SP1, SP2 and SP3 is long enough, the effect of blocking the leakage current can be presented.

[0092] As shown, in the light emitting display device according to the seventh embodiment of the present application, the first spacer structure 260B includes first to third patterns 260f, 260e and 260g configured to surround respective light emitting portions B, R and G of the first to third sub-pixels SP1, SP2 and SP3, the first pattern 260f has a fifth open area 2600E, the second pattern 260e has a sixth open area 2600F, and the third pattern 260g has a seventh open area 2600G. Figure 9C As shown, in the light emitting display device according to the eighth embodiment of the present application, the first spacer structure 260C is configured such that an eighth open area 2600H is formed in only one side of the first pattern 260i surrounding the light emitting portion B of each of the first sub-pixels SP1, and a ninth open area 2600I is formed in only one side of the second pattern 260h surrounding the light emitting portion R of each of the second sub-pixels SP2. In this case, each of the first pattern 260i and the second pattern 260h is not divided and is provided in a unitary type. Further, the third pattern 260j configured to surround the light emitting portion G of the third sub-pixel SP3 is extended to be curved upward and downward in the outward direction from the light emitting portion G, and thus passes between the first pattern 260i and the second pattern 260h adjacent to each other. The third pattern 260j is separately formed at both sides of the light emitting portion G, and can have a tenth open area 2600J formed in the extension of the third pattern 260j outside the light emitting portion G to be located on different horizontal lines parallel to each other.

[0093] In the light emitting display device according to the eighth embodiment, the open areas 2600H, 2600I and 2600J are not continuously provided in the horizontal direction and the vertical direction, thereby being able to effectively block the leakage current.

[0094] As shown, in the light emitting display device according to the seventh embodiment of the present application, the first spacer structure 260B includes first to third patterns 260f, 260e and 260g configured to surround respective light emitting portions B, R and G of the first to third sub-pixels SP1, SP2 and SP3, the first pattern 260f has a fifth open area 2600E, the second pattern 260e has a sixth open area 2600F, and the third pattern 260g has a seventh open area 2600G. 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.

[0095] 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.

[0096] 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.

[0097] In the light emitting display device according to the tenth embodiment, the current flowing out from the first sub-pixel SP1 through the eighth opening region 2600H passes between the first pattern 260h and the third pattern 260k adjacent to each other, passes between the first protrusion pattern 260j and the third pattern 260k adjacent to each other, passes through the eleventh opening region 2600L, is bent to pass between the first protrusion pattern 260j and the second protrusion pattern 260n, passes through the twelfth pattern 2600K, passes through the second protrusion pattern 260n and the third pattern 260k adjacent to each other, passes along the second pattern 260h, and then passes through the ninth opening region 2600I of the second pattern 260h. In this case, the flow path of the current is very long, and thus the influence of the leakage current between the first sub-pixel SP1 and the second sub-pixel SP2 can be prevented.

[0098] The current flowing between the first sub-pixel SP1 and the third sub-pixel SP3 also passes through the 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 second pattern 260h and the first pattern 260i adjacent thereto. Thus, the current flowing out from the first sub-pixel SP1 hardly influences the third sub-pixel SP3 adjacent thereto.

[0099] Hereinafter, the shape of the first spacer structure in other embodiments of the structure and arrangement of the sub-pixels different from those described above will be described.

[0100] Figures 10A-10H FIG. 11 is a plan view showing a light emitting display device according to an eleventh embodiment of the present application.

[0101] In the light emitting display devices according to the eleventh to eighteenth embodiments to be described below, it is common that the first sub-pixel SP1 is arranged in a first axis direction (in the vertical direction in these drawings), the second sub-pixel SP2 and the third sub-pixel SP3 are alternately arranged in the first axis direction, and the first sub-pixel SP1 has a shape configured to be adjacent to at least one of the second sub-pixel SP2 and the third sub-pixel SP3 in a second axis direction intersecting the first axis direction (in the horizontal direction in these drawings).

[0102] Further, the first to third sub-pixels SP1, SP2, and SP3 respectively include the light emitting portions B, R, and G formed therein, and the areas of the first to third sub-pixels SP1, SP2, and SP3 exposed from the bank portion 350 can be referred to as the light emitting portions B, R, and G.

[0103] 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.

[0104] 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 2-4 Thin-film transistors on ).

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 vertical formation in the organic stacking portions 121, 122a / 122b and 123 (see reference). Figures 2-4 The second electrode 180 on the ) (refer to) Figures 2-4 The resistance increases.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] As Figure 10D shown, compared with the eleventh embodiment, in the light emitting display device according to the fourteenth embodiment of the present application, 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 of preventing leakage current and reducing the resistance of the second electrode as the eleventh embodiment.

[0117] As Figure 10E shown, compared with the twelfth embodiment, in the light emitting display device according to the fifth embodiment of the present application, 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 with the fourteenth embodiment, no opening region is formed in the second patterns 360c1 and 360c2, and thus the effect of blocking the leakage current between the second sub-pixel SP2 and the third sub-pixel SP3 can be improved.

[0118] In addition, 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 a horizontal line different from the horizontal line on which the first opening region 3600A and the third opening region 3600C are formed, and thus the direct path of the current is blocked, and thus the effect of preventing leakage current can be improved.

[0119] As Figure 10F shown, compared with the fifth embodiment, in the light emitting display device according to the sixteenth embodiment of the present application, the first spacer structure 360E further includes a first auxiliary pattern 360f parallel to the first pattern 360a and having no opening region, and two second patterns 360c1 and 360c2 are connected to the first pattern 360a. Compared with the fifteenth embodiment, no opening region is formed in the first auxiliary pattern 360f, and thus the leakage current from the light emitting part B of the first sub-pixel SP to the light emitting part R of the second sub-pixel SP2 and the light emitting part G of the third sub-pixel SP3 can be completely blocked.

[0120] As 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 that are adjacent to each other.

[0121] 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.

[0122] 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.

[0123] 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 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 a first auxiliary pattern 360j; and a second pattern 360b1 and 360b2 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.

[0124] The first pattern 360a is divided into a first sub-pattern 360a1 and a second sub-pattern 360a2, and thus can have a first opening region 3600A adjacent to the light emitting part 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 part R of the second sub-pixel SP2 between the second sub-pattern 360a2 and the first sub-pattern 360a1. In addition, the first pattern 360a can further include a connection part 360k configured to connect the first patterns 360a1 and 360a2 parallel to each other and the first auxiliary pattern 360j. The first auxiliary pattern 360j can have a fifth opening region 3600E arranged on a different horizontal line from the first opening region 3600A and the third opening region 3600C. The connection part 360k is located between the first patterns 360a1 and 360a2 parallel to each other and the first auxiliary pattern 360j, thereby being able to block a leakage current or guide a current to flow.

[0125] In the light emitting display apparatus according to the eighteenth embodiment shown in the drawing, a path of a current flowing out of 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 that are not adjacent to each other, and thus it is possible to minimize the influence of the leakage current from the first sub-pixel SP1 on the second sub-pixel SP2.

[0126] In addition, a direct path of a current from the first sub-pixel SP1 to the third sub-pixel SP3 in the horizontal direction and the vertical direction is blocked, and thus it is possible to completely block the influence of the leakage current from the first sub-pixel SP1 on the third sub-pixel SP3.

[0127] In the light emitting display apparatus according to the eleventh to eighteenth embodiments, a second spacer structure 170 having a larger area and a larger height than the first spacer structures 360A to 360G can be formed (refer to Figure 1 ). The second spacer structure 170 is spaced apart from each of the first spacer structures 360A to 360G, and thus mainly contacts the deposition mask to support the deposition mask, thereby protecting elements (e.g., the bank and the first spacer structure) disposed below the second spacer structure.

[0128] Figure 11 is a plan view illustrating a light emitting display apparatus according to a nineteenth embodiment of the present application.

[0129] As Figure 11As shown, in the light emitting display device according to the nineteenth embodiment of the present application, the first spacer structure 60 is formed to completely surround the light emitting portions B, R and G of each of the sub-pixels SP1, SP2 and SP3. In this case, it is possible to prevent the influence of the on operation of each sub-pixel on other sub-pixels, but due to the horizontal and vertical connections of the first spacer structure 60, the resistance in the horizontal direction and the vertical direction of the second electrode (cathode) which must be formed on the entire surface of the sub-pixel can increase. Therefore, from the viewpoint of maintaining uniform voltage in the second electrode, it can be desirable that the light emitting display device according to the eleventh to eighteenth embodiments of the present application, in which the opening region is provided on at least one of the light emitting portions.

[0130] Hereinafter, Test Example 1 which is implemented to comparatively describe the effects exhibited by the first spacer structure of the light emitting display device according to the present application will be described.

[0131] Figure 12A and Figure 12B are optical images of the light emitting display device according to Test Example 1, for example, the first embodiment of the present application, and the light emitting display device according to Test Example 2, respectively, when emitting blue light at a low gray scale.

[0132] Hereinafter, the light emitting state of the light emitting display device according to Test Example 1, for example, the first embodiment of the present application, having the first spacer structure 160, and the light emitting display device according to Test Example 2, not having the first spacer structure, when only its blue sub-pixel is turned on, will be observed by a microscope.

[0133] As shown in FIGS. 10A and 10B, Figure 12A it can be confirmed that, in the light emitting display device according to Test Example 1, for example, the first embodiment in which the first spacer structure 160 having an inverted conical shape is provided, only the blue sub-pixel emits light. Further, it can be confirmed that, because the first spacer structure has the opening region, the voltage is uniformly applied to the second electrode (cathode), so the blue sub-pixel effectively emits light.

[0134] On the contrary, as shown in FIGS. 11A and 11B, Figure 12B it can be confirmed that, in the light emitting display device of Test Example 2 in which the first spacer structure having an inverted conical shape is not provided, when the blue sub-pixel is turned on, the red sub-pixel having a low threshold voltage around the blue sub-pixel is turned on. That is, due to the lateral leakage current, the undesired sub-pixel is turned on, resulting in a decrease in image quality.

[0135] Figure 13 is an SEM image showing the first spacer structure having an inverted conical shape and the elements around the same after the first encapsulation layer is formed in the light emitting display device according to the present application.

[0136] Figure 13 It is shown that, after the first encapsulation layer is formed, the first spacer structure of the light emitting display device according to the present application and the elements around the same, and it can be confirmed that the organic stack is not formed on the side portions of the first spacer structure, but is formed on the flat upper portions of the first spacer structure and the upper surfaces of the bank portions, and thus the organic stack is divided by the upper portions of the first spacer structure and the upper surfaces of the bank portions into respective regions having steps therebetween. The thickness of the first encapsulation layer formed of the inorganic material on the organic stack is equal to or greater than about 1 μm, and it can be confirmed that the first encapsulation layer formed of the inorganic material is formed to have continuity, and thus the first encapsulation layer is not only continuously formed on the upper portions of the first spacer structure and the surfaces of the bank portions, but also on the side portions of the first spacer structure.

[0137] This means that, due to the first spacer structure being provided, the organic stack is divided into regions corresponding to respective sub-pixels, and after the second electrode is formed, the first encapsulation layer is formed to cover the first spacer structure without being broken, and thus the light emitting display device is normally encapsulated.

[0138] After the first encapsulation layer is formed, a second encapsulation layer formed of an organic material can also be provided on the light emitting display device to planarize all regions of the light emitting display device.

[0139] In the light emitting display device according to each of the above-described embodiments of the present application, the first spacer structure having an inverted conical shape is located on the bank portion between adjacent sub-pixels, and the common layer deposited after the first spacer structure is formed is broken at the first spacer structure having the inverted conical shape, thereby being able to block a lateral leakage current caused by the common layer having high conductivity.

[0140] Further, the length and width of the first spacer structure having the inverted conical shape provided on the bank portion are limited, thereby being able to prevent an increase in sheet resistance of a specific region of the second electrode (cathode) formed after the common layer structure is formed. Thus, the second electrode can maintain a uniform voltage. That is, the first spacer structure has an open region with respect to at least some of the light emitting portions, and thus an increase in resistance of the second electrode can be prevented.

[0141] Further, as the pixel structure of the display device is diversified, the first spacer structure is not limited to a uniaxial shape, but has a shape that surrounds the light emitting portion and includes an open region formed in some portions of a closed loop type pattern configured to surround the light emitting portion to additionally guide the flow of current, thereby increasing a distance between the open regions of the first spacer structure between adjacent light emitting portions, and thus being able to improve the effect of preventing a lateral leakage current.

[0142] Further, in addition to the first spacer structure, a second spacer structure having a positive taper shape is provided on the bank to have a higher height than the first spacer structure, thereby being able to support the deposition mask when the deposition mask is disposed on the substrate to form a light emitting device, thereby protecting the elements disposed under the second spacer structure.

[0143] Further, the first spacer structure having an inverse taper shape is disposed at least between adjacent sub-pixels configured to emit light having different colors and having a threshold voltage difference therebetween, such that the common layer is disconnected at the outside of the first spacer structure, thereby preventing a sub-pixel having a low threshold voltage disposed adjacent to a turned-on sub-pixel from being turned on due to a lateral leakage current when the sub-pixel having a high threshold voltage is selectively turned on.

[0144] To this end, a light emitting display device according to one embodiment of the present application can include a substrate including a plurality of first to third sub-pixels disposed 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 bank disposed in the non-light emitting portion; a first electrode covered by the bank and disposed in the first to third sub-pixels, respectively, to expose the corresponding light emitting portion; a first spacer structure having an inverse taper shape configured to surround at least one side of each of the light emitting portions of the first to third sub-pixels on the bank; a common layer structure on the first electrode and the first spacer structure and disconnected at an edge of the first spacer structure; and a second electrode on the common layer structure.

[0145] The first spacer structure corresponding to at least one of the first to third sub-pixels can have an open area formed in a virtual closed loop configured to surround the light emitting portion of the at least one of the first to third sub-pixels.

[0146] The light emitting display device can further include a second spacer structure having a positive taper shape, the second spacer structure being spaced apart from the first spacer structure and configured to have a height higher than that of the first spacer structure.

[0147] The first spacer structure can include a first pattern configured to surround the light emitting portion of the first sub-pixel, a second pattern configured to surround the light emitting portion of the second sub-pixel, and a third pattern configured to surround the light emitting portion of the third sub-pixel, and the first to third patterns can be spaced apart from each other.

[0148] The first and second patterns can have open areas disposed not adjacent to each other, respectively.

[0149] The first spacer structure can have an opening region formed in the first pattern and an opening region formed in the second pattern between the light emitting part of the first sub-pixel and the light emitting part of the second sub-pixel, and can provide an extension part connected to the third pattern to block the opening regions formed in the first pattern and the second pattern, between the opening regions formed in the first pattern and the second pattern.

[0150] The first spacer structure can further include a fourth pattern provided between the first pattern and the second pattern, thereby being spaced apart from the first pattern and the second pattern.

[0151] The first spacer structure can further include, between the first pattern and the second pattern, a first protruding part configured to protrude from the first pattern to be spaced apart from the second pattern by a first distance, and a second protruding part configured to protrude from the second pattern to be spaced apart from the first pattern by a second distance.

[0152] The first spacer structure can further include a connection part configured to connect the third pattern between adjacent third sub-pixels.

[0153] At least one of the first to third patterns can have a plurality of opening regions, and the opening regions used as a boundary can be divided.

[0154] The first and second sub-pixels can be alternately arranged in rows and columns, and the third sub-pixel can be arranged to alternate with each of the first and second sub-pixels in a diagonal direction.

[0155] The first sub-pixel can be arranged in a first axis direction, the second and third sub-pixels can be alternately arranged in the first axis direction, and the first sub-pixel can be adjacent to at least one of the second and third sub-pixels in a second axis direction.

[0156] The first spacer structure can include a first pattern arranged between the first and second sub-pixels in a first axis direction, and a second pattern arranged between the second and third sub-pixels.

[0157] At least one of the first and second patterns can have an opening region adjacent to one of the light emitting parts of the first to third sub-pixels.

[0158] At least one of the first and second patterns can include a plurality of sub-patterns arranged parallel to each other.

[0159] The sub-patterns arranged parallel to each other can have opening regions provided not to be adjacent to each other.

[0160] The light emitting display device can further include a guide portion configured to connect the sub-patterns arranged in parallel to each other.

[0161] The first and second patterns can be connected to each other, and a contact point between the first and second patterns can be adjacent to the light emitting portion of the first sub-pixel.

[0162] The first sub-pixel can have a first light emitting layer configured to contact the common layer structure between the first and second electrodes to emit light having a first color, the second sub-pixel can have a second light emitting layer configured to contact the common layer structure between the first and second electrodes to emit light having a second color having a longer wavelength than the first color, and the third sub-pixel can have a third light emitting layer configured to contact the common layer structure between the first and second electrodes to emit light having a third color having a wavelength between a wavelength of the first color and a wavelength of the second color.

[0163] A width of the first spacer structure can be less than a critical dimension of a light emitting portion having a smallest size among the light emitting portions of the first to third sub-pixels.

[0164] The common layer structure can 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.

[0165] Among the first to third sub-pixels, a threshold voltage of the first sub-pixel can be the highest, and a threshold voltage of the second sub-pixel can be the lowest.

[0166] Among the first to third sub-pixels, an area of the first sub-pixel can be the largest, and an area of the second sub-pixel can be the smallest.

[0167] The light emitting display device according to another embodiment of the present application can include a substrate including a plurality of light emitting portions and a non-light emitting portion between the light emitting portions; first electrodes respectively disposed in the light emitting portions; a bank portion configured to selectively overlap the first electrodes and disposed in the non-light emitting portion; a first spacer structure having an inverse taper shape between adjacent light emitting portions on the bank portion, the first spacer structure being configured to have an open area formed in a virtual closed loop 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 on the first electrodes and the first spacer structure and being broken at edges of the first spacer structure; and a second electrode on the common layer structure.

[0168] As is apparent from the above description, the light emitting display device according to the present application has the following effects.

[0169] First, in the light emitting display device according to the present application, the first spacer structure having an inverted taper shape is positioned on the bank between adjacent sub-pixels, and the common layer deposited after the first spacer structure is formed is broken at the first spacer structure having the inverted taper shape, thereby being able to prevent a lateral leakage current caused by the common layer having high conductivity.

[0170] Second, the length and width of the first spacer structure having an inverted taper shape positioned on the bank are limited, thereby being able to prevent an increase in sheet resistance of a specific area of a second electrode (cathode) formed after the common layer structure is formed. Accordingly, the second electrode can maintain a uniform voltage. That is, the first spacer structure has an open area with respect to at least some of the light emitting portions, and thus is able to prevent an increase in resistance of the second electrode.

[0171] Third, as the pixel structure of the display device is diversified, the first spacer structure is not limited to a uniaxial shape, but has a shape that surrounds the light emitting portion and includes an open area formed in some portions of a closed loop type pattern configured to surround the light emitting portion to additionally guide the flow of current, thereby increasing the distance between the open areas of the first spacer structure between adjacent light emitting portions, and thus is able to improve the effect of preventing a lateral leakage current.

[0172] Fourth, in addition to the first spacer structure, a second spacer structure having a positive taper shape is positioned on the bank to have a higher height than the first spacer structure, thereby being able to support a deposition mask when the deposition mask is positioned on the substrate to form the light emitting device, thereby protecting elements positioned below the second spacer structure.

[0173] Fifth, the first spacer structure having an inverted taper structure is positioned at least between adjacent sub-pixels configured to emit light having different colors and having a threshold voltage difference therebetween, such that the common layer is broken outside the first spacer structure, thereby preventing a sub-pixel arranged adjacent to a turned-on sub-pixel having a low threshold voltage from being turned on due to a lateral leakage current when the sub-pixel having a high threshold voltage is selectively turned on.

[0174] It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A light emitting display apparatus, comprising: a substrate including a first to a third sub-pixel arranged adjacent to each other, each of the first to the third sub-pixel including a light emitting portion and a non-light emitting portion surrounding the light emitting portion; a bank at the non-light emitting portion; a first electrode covered by the bank and exposing the respective light emitting portion at the first to the third sub-pixel, respectively; a first spacer structure having an inverted taper shape on the bank configured to surround at least one side of each of the light emitting portion of the first to the third sub-pixel; a common layer structure on the first electrode and the first spacer structure and broken at edges of the first spacer structure; and a second electrode on the common layer structure, wherein: the first spacer structure includes a first pattern configured to surround the light emitting portion of the first sub-pixel, a second pattern configured to surround the light emitting portion of the second sub-pixel, and a third pattern configured to surround the light emitting portion of the third sub-pixel; the first to the third pattern are spaced apart from each other, and wherein the first spacer structure has an open area in the first pattern and an open area 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 an extension connected to the third pattern to block the open area in the first pattern and the open area in the second pattern is provided between the open area in the first pattern and the open area in the second pattern. the open area is in a virtual closed loop configured to surround the light emitting portion of at least one of the first sub-pixel and the second sub-pixel.

2. The light-emitting display device according to claim 1, wherein 3.The light emitting display apparatus of claim 1, further comprising a second spacer structure having a positive taper shape, the second spacer structure being spaced apart from the first spacer structure and configured to have a height higher than the first spacer structure. the first and the second pattern have the open area provided not adjacent to each other, respectively.

4. The light-emitting display device according to claim 1, wherein the first spacer structure further includes a fourth pattern spaced apart from the first and the second pattern between the first and the second pattern.

5. The light-emitting display device according to claim 1, wherein the first spacer structure further includes, between the first and the second pattern:

6. The light-emitting display device according to claim 1, wherein 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. each of the extension connects one third pattern surrounding the light emitting portion of one third sub-pixel to another third pattern surrounding the light emitting portion of an adjacent third sub-pixel.

7. The light-emitting display device according to claim 1, wherein at least one of the first to the third pattern has a plurality of open areas, and the open areas used as a boundary are partitioned.

8. The light-emitting display device according to claim 1, wherein 9.The light emitting display apparatus of claim 1, wherein: ​ the first sub-pixel and the second sub-pixel are alternately arranged in rows and columns; and the third sub-pixel is arranged to alternate with each of the first sub-pixel and the second sub-pixel in a diagonal direction.

10. The light-emitting display device according to claim 9, wherein the extension includes a first sub-pattern adjacent to at least one of the first pattern and a second sub-pattern adjacent to at least one of the second pattern, and the first sub-pattern and the second sub-pattern are arranged to be parallel to each other.

11. The light-emitting display device according to claim 10, wherein the first sub-pattern and the second sub-pattern have opening regions disposed not adjacent to each other.

12. The light-emitting display device of claim 1, wherein: the first sub-pixel has a first light-emitting layer in contact with the common layer structure between the first electrode and the second electrode, thereby emitting light having a first color; the second sub-pixel has a second light-emitting layer in contact with the common layer structure between the first electrode and the second electrode, thereby emitting light having a second color having a longer wavelength than the first color; and the third sub-pixel has a third light-emitting layer in contact with the common layer structure between the first electrode and the second electrode, thereby emitting light having a third color having a wavelength between the wavelength of the first color and the wavelength of the second color.

13. The light-emitting display device according to claim 1, wherein a width of the first spacer structure is smaller than a size of a light-emitting part having a smallest size among the light-emitting parts of the first sub-pixel to the third sub-pixel.

14. The light-emitting display device according to claim 1, wherein the common layer structure includes 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.

15. The light-emitting display device according to claim 1, wherein among the first sub-pixel to the third sub-pixel, the first sub-pixel has the highest threshold voltage, and the second sub-pixel has the lowest threshold voltage.

16. The light-emitting display device according to claim 1, wherein among the first sub-pixel to the third sub-pixel, the first sub-pixel has the largest area, and the second sub-pixel has the smallest area.

17. A light-emitting display device, comprising: a substrate including a plurality of light-emitting parts and non-light-emitting parts between the light-emitting parts; a first electrode disposed at the light-emitting parts, respectively; a bank configured to selectively overlap with the first electrode and disposed in the non-light-emitting parts; a first spacer structure having an inverted taper shape on the bank, the first spacer structure configured to have a loop pattern to surround each of the light-emitting parts; a common layer structure on the first electrode and the first spacer structure and broken at edges of the first spacer structure; and a second electrode on the common layer structure, wherein: the loop pattern for each of the light-emitting parts has at least one opening region, and an opening region in the loop pattern for an adjacent light-emitting part arranged in a first direction is blocked by an extension from the loop pattern for another light-emitting part in a second direction intersecting the first direction.

Images