Display device

Abstract

There is provided a display device including: a first substrate; a display element layer disposed on the first substrate and including at least one pixel including quantum dots; a first sealing member disposed on the first substrate and surrounding at least a portion of the display element layer; a second sealing member disposed on the first substrate and surrounding at least a portion of the first sealing member; and a second substrate disposed on the display element layer, the first sealing member, and the second sealing member.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly, to a display device for providing visual information. Background Art

[0002] With the development of information technology, the importance of display devices as a medium connecting users and information is becoming increasingly apparent. As a result, the use of display devices such as liquid crystal display devices, organic light-emitting display devices, plasma display devices, and quantum dot light-emitting display devices is increasing.

[0003] Quantum dot light-emitting display devices use quantum dots as light emitters and have the advantages of high chromaticity, high luminous efficiency, and multicolorization. A method for improving the performance of quantum dot light-emitting display devices is needed. Summary of the Invention

[0004] The embodiment provides a display device with improved display quality.

[0005] A display device according to an embodiment includes: a first substrate; a display element layer provided on the first substrate and including at least one pixel including quantum dots; a first sealing member provided on the first substrate and surrounding at least a portion of the display element layer; a second sealing member provided on the first substrate and surrounding at least a portion of the first sealing member; and a second substrate provided on the display element layer, the first sealing member, and the second sealing member.

[0006] In an embodiment, the first sealing member may include a first material, and the second sealing member may include a second material different from the first material.

[0007] In an embodiment, the second sealing member may include an acidic material.

[0008] In an embodiment, the second sealing member may further include glass frit and ceramic filler.

[0009] In an embodiment, the glass frit may include at least one selected from the group consisting of vanadium pentoxide (V2O5), bismuth trioxide (Bi2O3), and lead oxide (PbO).

[0010] In an embodiment, the acidic material may further include at least one selected from the group consisting of methacrylic acid, acrylic acid, and citric acid.

[0011] In an embodiment, the second sealing member may further include a polymer resin.

[0012] In an embodiment, the first sealing member may include polyacrylic acid (PAA).

[0013] In an embodiment, the first sealing member may be spaced apart from the display element layer.

[0014] In an embodiment, the second sealing member may be spaced apart from the first sealing member.

[0015] In an embodiment, the first sealing member may completely surround an outer edge of the display element layer.

[0016] In an embodiment, the second sealing member may completely surround the outer edge of the first sealing member.

[0017] In an embodiment, the width of the second sealing member may be greater than the width of the first sealing member.

[0018] In an embodiment, a height of the first sealing member and a height of the second sealing member may both be greater than a height of the display element layer.

[0019] In an embodiment, the first sealing member may contact the first substrate and the second substrate.

[0020] In an embodiment, the second sealing member may contact the first substrate and the second substrate.

[0021] A display device according to an embodiment includes: a first substrate; a display element layer provided on the first substrate and including at least one pixel including quantum dots; a sealing member provided on the first substrate, surrounding the display element layer and including an acidic material; and a second substrate provided on the display element layer and the sealing member.

[0022] In an embodiment, the sealing member may include a first sealing member surrounding at least a portion of the display element layer and a second sealing member surrounding at least a portion of the first sealing member.

[0023] In an embodiment, the second sealing member may include glass frit and ceramic filler.

[0024] In an embodiment, the acidic material may include at least one selected from the group consisting of methacrylic acid, acrylic acid, and citric acid.

[0025] In a display device according to an embodiment of the present disclosure, the display device may include: a first substrate; a display element layer provided on the first substrate; a first sealing member surrounding at least a portion of the display element layer; a second sealing member surrounding at least a portion of the first sealing member; and a second substrate provided on the first substrate, the first sealing member, and the second sealing member. Therefore, the embodiment of the present disclosure facilitates the implementation of a positive aging process in which hydrogen ions and / or water emitted from the first and second sealing members are supplied to the intermediate layer.

[0026] In some aspects, the first sealing member can contact both the first substrate and the second substrate.Thus, embodiments of the present disclosure support preventing or reducing a peeling phenomenon in which the second sealing member is separated from the first substrate.

[0027] In some aspects, the first sealing member can be spaced apart from the second sealing member. Thus, the first sealing member can partially contact a portion of the second substrate. Therefore, compared to when the first sealing member is completely in contact with the second substrate, when the first sealing member is partially in contact with the second substrate, embodiments of the present disclosure support the manufacture of a display device without implementing an additional process such as plasma treatment. Therefore, for example, compared to other methods, embodiments of the present disclosure support reduced processing time and reduced processing costs for manufacturing a display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Illustrative, non-limiting embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.

[0029] Figure 1 is a plan view illustrating a display device according to an embodiment of the present disclosure.

[0030] Figure 2 It is shown along Figure 1 A sectional view of a section taken along line II'.

[0031] Figure 3 It shows Figure 2 An enlarged cross-sectional view of area A.

[0032] Figure 4 It is shown along Figure 1 A sectional view of a section taken along line II-II'.

[0033] Figure 5 It shows Figure 4 A cross-sectional view of the first intermediate layer. DETAILED DESCRIPTION

[0034] Hereinafter, a display device according to an embodiment will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components will be omitted.

[0035] Embodiments supported by the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which one or more example embodiments are shown. However, aspects supported by the present disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the example aspects of the invention to those skilled in the art.

[0036] Terms such as first, second, etc. can be used to describe various components, but components should not be limited by the terms. The terms used here can distinguish a component from other components and are not limited by the terms. For example, without departing from the scope of this disclosure, a first component can be referred to as a second component, and similarly, a second component can also be referred to as a first component. Unless otherwise specified, terms in the singular may include plural forms.

[0037] The terms used herein are for the purpose of describing specific embodiments and are not restrictive. As used herein, unless the context clearly indicates otherwise, "one", "one (kind / person)", "the (said)" and "at least one (kind / person)" do not represent a limit on quantity and are intended to include both the singular and the plural. For example, unless the context clearly indicates otherwise, "element" has the same meaning as "at least one element". "At least one (kind / person)" is not to be interpreted as being limited to "one" or "one (kind / person)". "Or" means "and / or". As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items. It will also be understood that when the terms "comprise" or "include" and / or variations thereof are used in this specification, the description indicates the presence of the stated features, regions, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, regions, wholes, steps, operations, elements, components and / or their groups.

[0038] As used herein, the terms "about" or "approximately" are inclusive of the stated value and include a suitable range of deviation from the particular value determined by one of ordinary skill in the art, taking into account the measurement in question and the error associated with the measurement of the particular quantity. For example, the term "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0039] As used herein, the term "substantially" means approximately or substantially equal (e.g., within a threshold percentage of being equal). The term "substantially simultaneously" means approximately or substantially simultaneous (e.g., within a threshold percentage of being equal). The term "substantially the same" means approximately or substantially the same (e.g., within a threshold difference).

[0040] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will also be understood that terms (such as those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0041] It should be understood that the various embodiments disclosed and the terms used therein are not intended to limit the technical features set forth herein to specific embodiments, and include various changes, equivalents or alternatives to the corresponding embodiments. With respect to the description of the drawings, similar figure numerals may be used to refer to similar or related elements. It should be understood that, unless the relevant context clearly indicates otherwise, the singular form of the noun corresponding to an item may include one or more things. As used herein, each of phrases such as "A or B", "at least one of A and B", "A, B or C", and "at least one of A, B, and C" may include any one or all possible combinations of the items listed together in the corresponding phrase in the phrase.

[0042] Embodiments of the present disclosure support one or more processes (methods, flow charts) that support the features and embodiments described herein. Descriptions of elements that "may be provided," "may be formed," "may be arranged," "may be performed," etc., include processes (methods, flow charts) and techniques for making, providing, forming, positioning, and modifying the elements, etc., according to the example aspects described herein.

[0043] Figure 1 is a plan view illustrating a display device according to an embodiment of the present disclosure. Figure 2 It is shown along Figure 1 A sectional view of a section taken along line II'. Figure 3 It shows Figure 2 An enlarged cross-sectional view of area A.

[0044] Reference Figure 1 、 Figure 2 and Figure 3 The display device DD according to an embodiment of the present disclosure may include a display area DA and a peripheral area PA. The display area DA may be a region where an image is generated, and the peripheral area PA may be a region where no image is generated.

[0045] At least one pixel PX may be provided in the display area DA. The pixel PX may include a first pixel PX1, a second pixel PX2, and a third pixel PX3. The first pixel PX1, the second pixel PX2, and the third pixel PX3 may be referred to herein as sub-pixels. For example, the first pixel PX1 may emit a first light, the second pixel PX2 may emit a second light, and the third pixel PX3 may emit a third light. In an embodiment, the first light may be red light, the second light may be green light, and the third light may be blue light. However, embodiments of the present disclosure are not limited thereto. For example, a plurality of pixels PX may be combined to emit yellow, cyan, and magenta light.

[0046] In a plan view, the first pixel PX1, the second pixel PX2, and the third pixel PX3 may be repeatedly arranged along a first direction DR1 and a second direction DR2 intersecting the first direction DR1. For example, the second pixel PX2 may be adjacent to the first pixel PX1 in the second direction DR2. In some aspects, the third pixel PX3 may be adjacent to the second pixel PX2 in the second direction DR2.

[0047] The peripheral area PA may be positioned around the display area DA. For example, the peripheral area PA may surround at least a portion of the display area DA. A driver may be disposed in the peripheral area PA. The driver may provide signals or voltages to the pixels PX. For example, the driver may include a data driver, a gate driver, etc.

[0048] The display device DD may include a first substrate SUB1, a display element layer DL, a first sealing member 100, a second sealing member 200, and a second substrate SUB2.

[0049] The first substrate SUB1 may be a base of the display device DD. In an embodiment, the first substrate SUB1 may include glass, quartz, plastic, etc. These materials may be used alone or in combination with each other.

[0050] The display element layer DL may be provided on the first substrate SUB1. The display element layer DL may include one or more pixels PX. Therefore, the display element layer DL may display an image and may define a display area DA of the display device DD. In other words, the area where the display element layer DL is provided on the first substrate SUB1 may be the display area DA, and the area where the display element layer DL is not provided may be the peripheral area PA. That is, the display element layer DL may overlap with the display area DA in the third direction DR3, and may not overlap with the peripheral area PA in the third direction DR3. This will be referred to later. Figure 4 The specific structure of the display element layer DL is described.

[0051] The first sealing member 100 may be disposed on the first substrate SUB1. The first sealing member 100 may be disposed in the peripheral area PA. The first sealing member 100 may surround at least a portion of the display element layer DL. In an embodiment, the first sealing member 100 may completely surround the outer edge of the display element layer DL. In another embodiment, the first sealing member 100 may surround a portion of the display element layer DL.

[0052] In an embodiment, the first sealing member 100 may have a rectangular shape in a plan view. However, the embodiments of the present disclosure are not limited thereto, and the first sealing member 100 may have various shapes in a plan view, such as a polygonal shape or a circular shape.

[0053] In an embodiment, the first sealing member 100 may include an acidic material. For example, the acidic material may include polyacrylic acid (PAA). However, the type of the acidic material included in the first sealing member 100 according to an embodiment of the present disclosure is not limited thereto, and hydrogen ions (H ions) are supplied to the display element layer DL. + ) and / or water (H2O) may be included in the first sealing member 100. Therefore, embodiments of the present disclosure may include hydrogen ions (H + ) and / or water (H 2 O) is supplied to the display element layer DL instead of applying the acidic material directly to the display element layer DL.

[0054] In an embodiment, the first sealing member 100 may be spaced apart from the display element layer DL. In other words, the first sealing member 100 may not contact the display element layer DL. Specifically, the first sealing member 100 may be spaced apart from each of the first pixel PX1, the second pixel PX2, and the third pixel PX3.

[0055] The second sealing member 200 may be disposed on the first substrate SUB1. The second sealing member 200 may be disposed in the peripheral area PA. The second sealing member 200 may surround at least a portion of the first sealing member 100. In an embodiment, the second sealing member 200 may completely surround the first sealing member 100. In another embodiment, the second sealing member 200 may surround a portion of the first sealing member 100.

[0056] In an embodiment, the second sealing member 200 may have a rectangular shape in a plan view. However, the embodiments of the present disclosure are not limited thereto, and the second sealing member 200 may have various shapes in a plan view, such as a polygonal shape or a circular shape.

[0057] In an embodiment, the second sealing member 200 may be formed along the outer edge of the first sealing member 100 so as to maintain a constant distance between the second sealing member 200 and the first sealing member 100. However, the embodiments of the present disclosure are not limited thereto, and the distance between the second sealing member 200 and the first sealing member 100 may vary (e.g., may not be constant).

[0058] In an embodiment, in a plan view, the shape of the second sealing member 200 and the shape of the first sealing member 100 may be the same. For example, in a plan view, the shape of the first sealing member 100 and the shape of the second sealing member 200 may both have a rectangular shape. However, the embodiments of the present disclosure are not limited thereto, and in a plan view, the shape of the first sealing member 100 and the shape of the second sealing member 200 may be different from each other. For example, in a plan view, the shape of the second sealing member 200 may have a polygonal shape, and the shape of the first sealing member 100 may have a circular shape.

[0059] In an embodiment, hydrogen plasma treatment may be performed on the first sealing member 100. Thus, the amount of hydrogen ions emitted from the first sealing member 100 may be increased.

[0060] In an embodiment, the second sealing member 200 may be spaced apart from the first sealing member 100. For example, the second sealing member 200 may be spaced apart from the first sealing member 100 in a plane parallel to the first substrate SUB1. Specifically, the portion of the second sealing member 200 extending in the first direction DR1 and the portion of the first sealing member 100 extending in the first direction DR1 may be spaced apart in the second direction DR2. In some aspects, the portion of the second sealing member 200 extending in the second direction DR2 and the portion of the first sealing member 100 extending in the second direction DR2 may be spaced apart in the first direction DR1. In other words, the second sealing member 200 may not contact the first sealing member 100.

[0061] In an embodiment, the second sealing member 200 may include an acidic material. For example, the acidic material may include methacrylic acid, acrylic acid, citric acid, or the like. The acid may be used alone or in combination. However, the type of acidic material included in the second sealing member 200 according to an embodiment of the present disclosure is not limited thereto, and various types of acidic materials that supply hydrogen ions to the display element layer DL may be included in the second sealing member 200.

[0062] like Figure 3 As shown in FIG, the second sealing member 200 may further include a ceramic filler 220 and a glass powder 240. For example, the second sealing member 200 may form a glass frit by the ceramic filler 220 and the glass powder 240.

[0063] The ceramic filler 220 may include fillers having various shapes positioned in the second sealing member 200. The fillers may be spaced apart from each other in the second sealing member 200. In an embodiment, the shape and arrangement of the fillers may be irregular. However, in the present disclosure, the shape and arrangement of the fillers are not limited thereto, and the shape and arrangement of the fillers may be regular. The ceramic filler 220 may improve the mechanical strength of the second sealing member 200.

[0064] The glass frit 240 may include a glass material. The organic material may include vanadium pentoxide (V2O5), bismuth trioxide (Bi2O3), lead oxide (PbO), etc. These materials may be used alone or in combination with each other.

[0065] The glass powder 240 may be arranged so that the glass powder 240 is spaced apart from the ceramic filler 220. In some aspects, the glass powder 240 may include powders of various shapes positioned in the second sealing member 200. The powders may be spaced apart from each other in the second sealing member 200. In an embodiment, the shape and arrangement of the powders may be irregular. However, in the present disclosure, the shape of the filler is not limited thereto, and the shape of the filler may be regular.

[0066] In an embodiment, the second sealing member 200 may further include a polymer resin 260. The polymer resin 260 may have viscosity. For example, the polymer resin 260 may bond the ceramic filler 220 and the glass frit 240 included in the second sealing member 200 to each other. The polymer resin 260 may include ethyl cellulose (EC). However, embodiments of the present disclosure are not limited thereto and may include various types of polymer resins that bond the ceramic filler 220 and the glass frit 240 included in the second sealing member 200 to each other. In an embodiment, the second sealing member 200 may further include a solvent that dissolves the polymer resin 260.

[0067] In an embodiment, the first sealing member 100 and the second sealing member 200 may include different materials from each other. For example, the first sealing member 100 may include a first material, and the second sealing member 200 may include a second material different from the first material. In an example, unlike the second sealing member 200, the first sealing member 100 may not include the ceramic filler 220, the glass frit 240, and the polymer resin 260.

[0068] The surface 280 of the second sealing member 200 may surround the ceramic filler 220, the glass frit 240, and the polymer resin 260. The surface 280 of the second sealing member 200 may contact the first substrate SUB1 and the second substrate SUB2. In some aspects, an acidic material may be applied to the surface 280 of the second sealing member 200. In some aspects, the speed at which hydrogen ions included in the acidic material are supplied to the display element layer DL may be improved by a post-bake process.

[0069] In an embodiment, hydrogen plasma treatment may be performed on the second sealing member 200. Thus, the amount of hydrogen ions emitted from the second sealing member 200 may be increased.

[0070] In an embodiment, in a plan view parallel to the first substrate SUB1, the area of the second sealing member 200 may be relatively larger than the area of the first sealing member 100. Specifically, the width W2 of the portion of the second sealing member 200 extending in the first direction DR1 in the second direction DR2 may be larger than the width W1 of the portion of the first sealing member 100 extending in the first direction DR1 in the second direction DR2. In some aspects, when the display device DD is cut along a line parallel to the first direction DR1, the width of the portion of the second sealing member 200 extending in the second direction DR2 in the first direction DR1 may be larger than the width of the portion of the first sealing member 100 extending in the second direction DR2 in the first direction DR1.

[0071] However, the embodiments of the present disclosure are not limited thereto. In a plane, the area of the second sealing member 200 may be relatively smaller than the area of the first sealing member 100, or the area of the second sealing member 200 may be the same as that of the first sealing member 100 (e.g., equal or having the same shape, etc.). For example, the width W2 of the portion of the second sealing member 200 extending in the first direction DR1 in the second direction DR2 may be smaller than the width W1 of the portion of the first sealing member 100 extending in the first direction DR1 in the second direction DR2. Alternatively, the width W2 of the portion of the second sealing member 200 extending in the first direction DR1 in the second direction DR2 may be the same as the width W1 of the portion of the first sealing member 100 extending in the first direction DR1 in the second direction DR2.

[0072] In embodiments, the height H2 of the first sealing member 100 may be greater than the height H1 of the display element layer DL. In some aspects, the height H3 of the second sealing member 200 may be greater than the height H1 of the display element layer DL. Each of the height H2 of the first sealing member 100 and the height H3 of the second sealing member 200 may be the distance between the first substrate SUB1 and the second substrate SUB2. Since the display element layer DL does not contact the first substrate SUB1 and the second substrate SUB2 and is spaced apart from each of the first sealing member 100 and the second sealing member 200, each of the height H2 of the first sealing member 100 and the height H3 of the second sealing member 200 may be greater than the height H1 of the display element layer DL.

[0073] In an embodiment, the height H2 of the first sealing member 100 and the height H3 of the second sealing member 200 may be substantially the same. In another embodiment, the height H2 of the first sealing member 100 and the height H3 of the second sealing member 200 may be different from each other.

[0074] The second substrate SUB2 may be disposed on the first substrate SUB1. The second substrate SUB2 may be disposed on the first sealing member 100, the second sealing member 200, and the display element layer DL. For example, the second substrate SUB2 may cover the display element layer DL. Specifically, the second substrate SUB2 may be an encapsulation substrate that protects the display element layer DL. For example, the second substrate SUB2 may include glass.

[0075] The second substrate SUB2 may be disposed so as to overlap the first substrate SUB1. The second substrate SUB2 and the first substrate SUB1 may face each other. Specifically, the rear surface of the second substrate SUB2 may face the upper surface of the first substrate SUB1. In some aspects, the second substrate SUB2 and the first substrate SUB1 may face each other and be spaced apart in the third direction DR3.

[0076] The second substrate SUB2 may cover the first sealing member 100 and the second sealing member 200. The second substrate SUB2 may contact each of the first sealing member 100 and the second sealing member 200. For example, a portion of the second substrate SUB2 may contact the upper surface of the first sealing member 100. A portion of the second substrate SUB2 may contact the upper surface of the second sealing member 200. Thus, the first sealing member 100 and the second sealing member 200 may join the first substrate SUB1 and the second substrate SUB2. In some aspects, the first substrate SUB1 and the second substrate SUB2 may be spaced apart from each other due to the first sealing member 100 and the second sealing member 200.

[0077] In an embodiment, during the manufacturing process of the display device DD, the second sealing member 200 may be formed on the first substrate SUB1. After the second sealing member 200 is formed on the first substrate SUB1, the display device DD may be manufactured by bonding the second substrate SUB2 and the first substrate SUB1. In other words, the second sealing member 200 may not be formed on the second substrate SUB2, and as the second substrate SUB2 and the first substrate SUB1 are bonded, the second sealing member 200 may contact the second substrate SUB2. However, embodiments of the present disclosure are not limited thereto.

[0078] Figure 4 It is shown along Figure 1 A sectional view of a section taken along line II-II'.

[0079] Reference Figure 4The display device DD may include a first substrate SUB1, a first driving element TR1, a second driving element TR2 and a third driving element TR3, an insulating structure ILD, a pixel defining layer PDL, a first pixel electrode AE1, a second pixel electrode AE2, a third pixel electrode AE3, a first intermediate layer ML1, a second intermediate layer ML2, a third intermediate layer ML3, a common electrode CE and a second substrate SUB2.

[0080] Figure 2 The display element layer DL may include a first driving element TR1, a second driving element TR2, a third driving element TR3, an insulating structure ILD, a pixel defining layer PDL, a first pixel electrode AE1, a second pixel electrode AE2, a third pixel electrode AE3, a first intermediate layer ML1, a second intermediate layer ML2, a third intermediate layer ML3 and a common electrode CE.

[0081] Figure 1 The first pixel PX1 may be formed by a first driving element TR1, a first pixel electrode AE1, a first intermediate layer ML1, and a common electrode CE. Figure 1 The second pixel PX2 may be formed by a second driving element TR2, a second pixel electrode AE2, a second intermediate layer ML2, and a common electrode CE. Figure 1 The third pixel PX3 may be formed by a third driving element TR3, a third pixel electrode AE3, a third intermediate layer ML3, and a common electrode CE.

[0082] The first driving element TR1, the second driving element TR2, and the third driving element TR3 may be disposed in the display area DA on the first substrate SUB1. Each of the first driving element TR1, the second driving element TR2, and the third driving element TR3 may include at least one transistor. The channel layer of the transistor may include an oxide semiconductor, a silicon semiconductor, an organic semiconductor, or the like.

[0083] The insulating structure ILD may be disposed on the first substrate SUB1. The insulating structure ILD may cover the first driving element TR1, the second driving element TR2, and the third driving element TR3. The insulating structure ILD may include at least one inorganic layer and at least one organic layer. The inorganic layer may include an inorganic insulating material. For example, the inorganic insulating material may include silicon oxide, silicon nitride, or silicon oxynitride. These materials may be used alone or in combination. The organic insulating layer may include an organic material. For example, the organic insulating material may include a polyimide resin or a polyamide resin. These materials may be used alone or in combination.

[0084] The first pixel electrode AE1, the second pixel electrode AE2, and the third pixel electrode AE3 may be disposed on the insulating structure ILD. Each of the first pixel electrode AE1, the second pixel electrode AE2, and the third pixel electrode AE3 may include a conductive material such as a metal, an alloy, a conductive metal nitride, a conductive metal oxide, or a transparent conductive material. Each of the first pixel electrode AE1, the second pixel electrode AE2, and the third pixel electrode AE3 may have a single-layer structure or a multi-layer structure including a plurality of conductive layers.

[0085] The first pixel electrode AE1 , the second pixel electrode AE2 , and the third pixel electrode AE3 may be electrically connected to the first driving element TR1 , the second driving element TR2 , and the third driving element TR3 , respectively, through contact holes formed in the insulating structure ILD.

[0086] A pixel defining layer PDL may be disposed on the first, second, and third pixel electrodes AE1, AE2, and AE3. The pixel defining layer PDL may define a pixel opening exposing at least a portion of each of the first, second, and third pixel electrodes AE1, AE2, and AE3.

[0087] The pixel defining layer (PDL) may include an organic insulating material. For example, the organic insulating material may include photoresist, polyacrylic resin, polyimide resin, polyamide resin, siloxane resin, acryl resin, or epoxy resin. These materials may be used alone or in combination.

[0088] The first intermediate layer ML1, the second intermediate layer ML2, and the third intermediate layer ML3 may be disposed on the first pixel electrode AE1, the second pixel electrode AE2, and the third pixel electrode AE3 exposed through the pixel opening of the pixel defining layer PDL. Specifically, the first intermediate layer ML1 may be disposed on the first pixel electrode AE1. The second intermediate layer ML2 may be disposed on the second pixel electrode AE2. The third intermediate layer ML3 may be disposed on the third pixel electrode AE3.

[0089] The first intermediate layer ML1 may include a material that emits a first light, the second intermediate layer ML2 may include a material that emits a second light, and the third intermediate layer ML3 may include a material that emits a third light. As described herein, the first light may be blue light, the second light may be red light, and the third light may be green light. However, embodiments of the present disclosure are not limited thereto.

[0090] The common electrode CE may be disposed on the pixel defining layer PDL, the first middle layer ML1, the second middle layer ML2, and the third middle layer ML3. For example, the common electrode CE may entirely cover the pixel defining layer PDL, the first middle layer ML1, the second middle layer ML2, and the third middle layer ML3. The common electrode CE may include a conductive material such as a metal, an alloy, a conductive metal nitride, a conductive metal oxide, or a transparent conductive material.

[0091] The first pixel electrode AE1, the first middle layer ML1, and the common electrode CE may together form a first light emitting element LED1. The second pixel electrode AE2, the second middle layer ML2, and the common electrode CE may together form a second light emitting element LED2. The third pixel electrode AE3, the third middle layer ML3, and the common electrode CE may together form a third light emitting element LED3.

[0092] The second substrate SUB2 may be disposed on the common electrode CE. A separation structure may be disposed in a space between the second substrate SUB2 and the common electrode CE. The separation structure may separate the second substrate SUB2 and the common electrode CE from each other. In other words, the separation structure may Figure 2 The display element layer DL and the second substrate SUB2 are separated from each other. However, the embodiment of the present disclosure is not limited thereto, and components other than the separation structure may be provided on the display element layer DL and the second substrate SUB2. Figure 2 Alternatively, or additionally, an air layer or a vacuum layer may be formed in the space between the display element layer DL and the second substrate SUB2.

[0093] Figure 5 It shows Figure 4 A cross-sectional view of the first intermediate layer.

[0094] Reference Figure 5 , the first middle layer ML1 may include a first hole assisting layer HTL1 , a first light emitting layer EML1 , and a first electron assisting layer ETL1 .

[0095] The first hole auxiliary layer HTL1 may be provided on Figure 4 On the first pixel electrode AE1, the second pixel electrode AE2, and the third pixel electrode AE3. For example, the first hole auxiliary layer HTL1 may include a hole injection layer and / or a hole transport layer. However, the embodiments of the present disclosure are not limited thereto. For example, the first hole auxiliary layer HTL1 may further include a buffer layer or an electron blocking layer. The buffer layer can be used to improve luminous efficiency by compensating for the optical resonance distance based on the wavelength of light emitted from the first light-emitting layer EML1. In some aspects, the electron blocking layer can be used to prevent electron injection from the first electron auxiliary layer ETL1.

[0096] The first light-emitting layer EML1 may be disposed on the first hole-assisting layer HTL1. The first light-emitting layer EML1 may include first quantum dots QD1 and a matrix resin. The first quantum dots QD1 may emit light when stimulated by light. By adjusting the composition and / or size of the first quantum dots QD1, the absorption and emission wavelengths of the first quantum dots QD1 may be adjusted. The first quantum dots QD1 may be disposed in a matrix resin. The matrix resin may include a polymer resin, etc. However, the materials included in the matrix resin in the embodiments of the present disclosure are not limited thereto.

[0097] In an embodiment, the first quantum dot QD1 is a II-VI semiconductor compound, a III-VI semiconductor compound, a III-V semiconductor compound, a IV-VI semiconductor compound, a IV element or compound, or an I-III-VI semiconductor compound, etc. These compounds can be used alone or in combination.

[0098] II-VI semiconductor compounds may include: binary compounds, such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgS, MgSe, etc.; ternary compounds, such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnS e, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnS, MgZnSe, etc. as examples; quaternary compounds, such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, etc. as examples; or any combination thereof.

[0099] The III-VI semiconductor compounds may include: binary compounds, such as In2S3, Ga2S3, etc.; ternary compounds, such as InGaS3, InGaSe3, etc.; or any combination thereof.

[0100] Group III-V semiconductor compounds include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb; ternary compounds such as GaNPs, GaNAs, GaNSb, GaPAs, GaPSb, AlNPs, AlNAs, AlNSb, AlPAs, AlPSb, InAsP, InGaP, InGaAs, InAlP, InNPs, InNAs, InNSb, InPAs, InPSb, and GaAlNPs; and quaternary compounds such as GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNPs, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNPs, InAlNAs, InAlNSb, InAlPAs, and InAlPSb, or any combination thereof. Group III-V semiconductor compounds may also include Group II metals (e.g., InZnP).

[0101] Group IV-VI compounds include: binary compounds, such as SnS, SnSe, SnTe, PbS, PbSe, PbTe, etc.; ternary compounds, such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, etc.; quaternary compounds, such as SnPbSSe, SnPbSeTe, SnPbSTe, etc.; or any combination thereof.

[0102] The Group IV element or the compound containing the Group IV element is: Si and / or Ge; a binary compound, such as SiC, SiGe, etc.; or any combination thereof.

[0103] Group I-III-VI semiconductor compounds include ternary compounds such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, and AgAlO2, or any combination thereof. Group I-III-VI semiconductor compounds may also include Group II elements. For example, Group I-III-VI semiconductor compounds may include quaternary compounds such as CuInZnS.

[0104] The first quantum dot QD1 may have a single structure including uniform components and composition, or a complex structure such as a core-shell structure, a gradient structure, and the like.

[0105] The first electron assisting layer ETL1 may be disposed on the first light emitting layer EML1. The first electron assisting layer ETL1 may include an electron transport layer and / or an electron injection layer. However, embodiments of the present disclosure are not limited thereto. For example, the first electron assisting layer ETL1 may further include an electron blocking layer. The electron blocking layer may be used to prevent hole injection from the first electron assisting layer ETL1.

[0106] In an embodiment, the first electron assist layer ETL1 may include first nanoparticles NP1. In an embodiment, the first nanoparticles NP1 may include metal oxides. For example, the metal oxide may include zinc oxide (ZnO) or zinc magnesium oxide (ZnMgO). These materials may be used alone or in combination.

[0107] However, the first intermediate layer ML1 is shown as a structure in which the first hole assisting layer HTL1, the first light emitting layer EML1, and the first electron assisting layer ETL1 are stacked in this order, but the embodiments of the present disclosure are not limited thereto. Alternatively, the first intermediate layer ML1 may have an inverted structure in which the first electron assisting layer ETL1, the first light emitting layer EML1, and the first hole assisting layer HTL1 are stacked in this order.

[0108] although Figure 5 The structure of the first middle layer ML1 is shown, but Figure 4 The respective structures of the second and third middle layers ML2 and ML3 may be substantially the same as that of the first middle layer ML1 , and repeated description of the same elements is omitted for the sake of brevity.

[0109] However, further reference Figure 1 、 Figure 2 and Figure 3 Embodiments of the present disclosure support positive aging, a process that removes defects formed in the first nanoparticles NP1 by supplying hydrogen ions and / or water to the first nanoparticles NP1 included in the first electron assist layer ETL1. Consequently, the luminous efficiency of the display device DD can be improved. Water is a medium for supplying hydrogen ions, and the hydrogen ions and water supplied to the first nanoparticles NP1 can diffuse in gaseous form.

[0110] As described herein, the display device DD may include a first sealing member 100 and a second sealing member 200 including an acidic material. Therefore, embodiments of the present disclosure may include performing positive aging in which hydrogen ions and / or water emitted from the first sealing member 100 and the second sealing member 200 are supplied to the first intermediate layer ML1, the second intermediate layer ML2, and the third intermediate layer ML3 of the display element layer DL. Specifically, the hydrogen ions and / or water may be supplied to the first electron assisting layer ETL1, the second electron assisting layer, and the third electron assisting layer.

[0111] In some aspects, the first sealing member 100 may be in contact with both the first substrate SUB1 and the second substrate SUB2. Thus, the second sealing member 200 may be prevented from being separated from the first substrate SUB1.

[0112] In some aspects, the first sealing member 100 and the second sealing member 200 can be spaced apart from each other on the first substrate SUB1. Thus, the first sealing member 100 can partially contact a portion of the second substrate SUB2. Therefore, when the first sealing member 100 partially contacts the second substrate SUB2, compared to when the first sealing member 100 completely contacts the second substrate SUB2, embodiments of the present disclosure support the manufacture of a display device DD without performing additional processes, such as, for example, plasma treatment. Thus, for example, embodiments of the present disclosure support reduced processing time and reduced processing costs for manufacturing a display device DD, compared to other methods.

[0113] The device according to the example embodiments described herein may be applied to an electronic device included in a computer, a notebook, a mobile phone, a smart phone, a smart tablet, a PMP, a PDA, an MP3 player, or the like.

[0114] Although the apparatus according to the embodiment has been described with reference to the accompanying drawings, the illustrated embodiment is an example and may be modified and changed by one of ordinary skill in the relevant technical field without departing from the technical spirit described in the claims.

Claims

1. A display device, comprising: first base; a display element layer disposed on the first substrate and comprising at least one pixel including quantum dots; a first sealing member disposed on the first substrate and surrounding at least a portion of the display element layer; a second sealing member disposed on the first substrate and surrounding at least a portion of the first sealing member; as well as The second substrate is provided on the display element layer, the first sealing member and the second sealing member.

2. The display device according to claim 1, wherein The first sealing member includes a first material, and the second sealing member includes a second material different from the first material.

3. The display device according to claim 1, wherein The second sealing member includes an acidic material.

4. The display device according to claim 3, wherein The second sealing member further includes glass frit and ceramic filler.

5. The display device according to claim 4, wherein The glass frit includes at least one selected from the group consisting of vanadium pentoxide, bismuth trioxide, and lead oxide. The display device according to claim 1 , wherein: The first sealing member is spaced apart from the display element layer, and The second sealing member is spaced apart from the first sealing member.

7. The display device according to claim 1, wherein The first sealing member completely surrounds the outer edge of the display element layer, and The second sealing member completely surrounds an outer edge of the first sealing member.

8. The display device according to claim 1, wherein The second sealing member contacts the first substrate and the second substrate.

9. A display device, comprising: first base; a display element layer disposed on the first substrate and comprising at least one pixel including quantum dots; a sealing member disposed on the first substrate, surrounding the display element layer, and comprising an acidic material; as well as The second substrate is provided on the display element layer and the sealing member.

10. The display device according to claim 9, wherein The sealing member comprises: a first sealing member surrounding at least a portion of the display element layer; and a second sealing member surrounding at least a portion of the first sealing member, and The second sealing member includes glass frit and ceramic filler.

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