Spliced display device

Abstract

There is provided a tiled display device including a display device including a first display device and a second display device adjacent to each other, the first display device and the second display device each including a display area including a first display area and a second display area. The first display area includes at least a portion of an inner area of the display area, and the second display area includes at least a portion of an edge area of the display area. Each of the display devices includes: an internal sub-pixel disposed on a base layer in a first display area; and an edge sub-pixel disposed on the base layer in the second display area. The edge sub-pixel includes an inorganic light emitting element including an inorganic material, and the inner sub-pixel includes a light source different from the inorganic light emitting element. The tiled display device has improved external visibility and improved process productivity.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0067057 filed on May 24, 2023, in the Korean Intellectual Property Office (KIPO), the entire contents of which are incorporated herein by reference. Technical Field

[0002] The invention discloses a spliced ​​display device and a display device. Background Art

[0003] In recent years, as interest in information display has increased, research and development of display devices has been ongoing. Utility Model Content

[0004] An object of the utility model is to provide a spliced ​​display device and a display device with improved external visibility and improved process productivity.

[0005] According to the disclosed embodiments, a spliced ​​display device may include a display device including a first display device and a second display device adjacent to each other, the first display device and the second display device each including a display area, and the display area including a first display area and a second display area. The first display area may include at least a portion of an internal area of ​​the display area, and the second display area may include at least a portion of an edge area of ​​the display area. Each of the display devices may include: an internal sub-pixel, which is disposed on a substrate layer in the first display area; and an edge sub-pixel, which is disposed on the substrate layer in the second display area. The edge sub-pixel may include an inorganic light-emitting element including an inorganic material, and the internal sub-pixel may include a light source different from the inorganic light-emitting element.

[0006] According to an embodiment, the second display area may be provided between the first display area of ​​the first display device and the first display area of ​​the second display device.

[0007] According to an embodiment, the second display area of ​​the first display device may be disposed directly adjacent to the second display area of ​​the second display device.

[0008] According to an embodiment, in a plane, the second display area may completely surround the periphery of the first display area.

[0009] According to an embodiment, the inner sub-pixel may include an organic light emitting diode (OLED) or a liquid crystal display (LCD) light source.

[0010] According to an embodiment, the edge sub-pixel may further include a light transmitting layer disposed on the inorganic light emitting element.

[0011] According to an embodiment, the interior sub-pixels may be spaced apart from each other by a first distance. The interior sub-pixels that are most adjacent to the second display area among the interior sub-pixels and the edge sub-pixels that are most adjacent to the first display area among the edge sub-pixels may be spaced apart from each other by a second distance. The first distance and the second distance may be equal.

[0012] According to an embodiment, the edge sub-pixels may be spaced apart from each other by a third distance. The first distance and the third distance may be equal.

[0013] According to an embodiment, the edge subpixel of the first display device that is most adjacent to the second display device and the edge subpixel of the second display device that is most adjacent to the first display device may be spaced apart from each other by a fourth distance. The first distance and the fourth distance may be equal.

[0014] According to an embodiment, each of the display devices may further include a color conversion layer disposed on the inorganic light emitting element and a light source different from the inorganic light emitting element and including quantum dots.

[0015] According to an embodiment, each of the display devices may further include an upper substrate disposed on the color conversion layer.

[0016] According to an embodiment, the inorganic light emitting element may include an N-type semiconductor layer, a P-type semiconductor layer, an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, and an element color conversion layer including quantum dots. The N-type semiconductor layer may include an accommodation region in which at least a portion of the N-type semiconductor layer is removed. The element color conversion layer may be disposed in the accommodation region.

[0017] According to the disclosed embodiment, the display device may include: an inorganic light-emitting element, which is disposed on a base layer and includes an N-type semiconductor layer, a P-type semiconductor layer, an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, and an element color conversion layer including quantum dots. The N-type semiconductor layer may include an accommodation area in which at least a portion of the N-type semiconductor layer is removed. The element color conversion layer may be disposed in the accommodation area.

[0018] According to an embodiment, the inorganic light emitting element may be a red light emitting element or a green light emitting element.

[0019] According to an embodiment, the inorganic light emitting element may include a passivation layer that passivates the element color conversion layer. The inorganic light emitting element may have an integral structure including quantum dots.

[0020] According to the disclosed embodiments, a spliced ​​display device and a display device having improved external visibility and improved process productivity may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features of the disclosure will become more apparent by describing the disclosed embodiments in more detail with reference to the accompanying drawings, in which:

[0022] Figures 1 to 3 is a plan view showing a spliced ​​display device according to an embodiment;

[0023] Figures 4 to 7 is a schematic cross-sectional view showing a spliced ​​display device according to an embodiment;

[0024] Figure 8 is a schematic cross-sectional view showing the structure of a display layer in a first display area; and

[0025] Fig. 9 is a schematic cross-sectional view showing the structure of a display layer in the second display area. DETAILED DESCRIPTION

[0026] The disclosure can be modified in various ways and have various forms. Therefore, specific embodiments will be shown in the drawings and will be described in detail in the specification. However, it should be understood that the disclosure is not limited to the specific form disclosed, and the disclosure is intended to include all modifications, equivalents and substitutes within the spirit and technical scope of the disclosure.

[0027] Terms such as "first", "second", etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component without departing from the scope of the disclosure. In the following description, unless the context clearly indicates otherwise, a singular expression includes a plural expression.

[0028] The terms used herein are used for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "one", and "the" are also intended to include the plural forms. In addition, when the terms "comprise", "include" and / or their variations are used in this specification, the stated features, wholes, steps, operations, elements, components and / or their groups are indicated, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their groups is not excluded.

[0029] When an element or layer is referred to as being "on," "connected to," or "bound to" another element or layer, the element or layer may be directly on, directly connected to, or directly bound to the other element or layer, or there may be intervening elements or layers. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly bound to" another element or layer, there are no intervening elements or layers. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, and / or a fluid connection with or without intervening elements.

[0030] For descriptive purposes, spatially relative terms such as "under," "below," "under," "lower," "above," "upper," "above," "higher," "side" (e.g., as in "sidewall"), etc., may be used herein to describe the relationship of one element to another (other) element as shown in the accompanying drawings. In addition to the orientation depicted in the accompanying drawings, spatially relative terms are intended to include different orientations of the device in use, operation, and / or manufacture. For example, if the device in the accompanying drawings is turned over, an element described as "under" or "beneath" other elements or features will subsequently be oriented to be "above" the other elements or features. Thus, the exemplary term "under" can include both above and below orientations. In addition, the device can be oriented otherwise (e.g., rotated 90 degrees or in other orientations), and as such, the spatially relative descriptors used herein are interpreted accordingly.

[0031] In the specification and claims, for the purpose of its meaning and interpretation, the phrase "at least one of..." is intended to include the meaning of "at least one selected from the group of...". For example, "at least one of A and B" may be understood to mean "A, B, or A and B". In the specification and claims, for the purpose of its meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in a conjunction or disjunction sense and may be understood to be equivalent to "and / or".

[0032] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will also be understood that terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the specification.

[0033] The present invention relates to a display device. Hereinafter, a spliced ​​display device and a display device according to embodiments are described with reference to the accompanying drawings.

[0034] Figures 1 to 3 is a plan view showing a spliced ​​display device according to an embodiment.

[0035] The tiled display device TDD may be configured to provide visual information to a user.The tiled display device TDD may provide (or emit) light in a display direction of the tiled display device TDD (eg, in the third direction DR3 ).

[0036] The spliced ​​display device TDD may be provided by combining a plurality of display devices DD. According to an embodiment, the spliced ​​display device TDD may have a large screen by combining the display devices DD, and thus may be used in fields requiring a wide display surface such as outdoor advertising.

[0037] The display device DD included in the spliced ​​display device TDD may include a first display device DD1 to a fourth display device DD4. According to an embodiment, the spliced ​​display device TDD may include four display devices, but the number of display devices forming (or constituting) the spliced ​​display device TDD is not limited to a specific example. Hereinafter, for ease of description, the disclosure is described based on an embodiment including four display devices DD1, DD2, DD3, and DD4. The technical features described based on the display device DD may be commonly applied to each of the first display device DD1 to the fourth display device DD4.

[0038] The spliced ​​display device TDD may include pixels PXL, a display area DA, and a bonding area BA.

[0039] Light may be output in the display area DA. The pixel PXL may be disposed in the display area DA. The display area DA may be formed on the front surface of the spliced ​​display device TDD, but the disclosure is not limited thereto, and the display area DA may also be formed on the side surface and / or rear surface of the spliced ​​display device TDD. In the specification, the disclosure is described based on an embodiment in which the display area DA is formed on the front surface of the spliced ​​display device TDD.

[0040] The pixel PXL may be disposed in the display area DA. The pixel PXL may include a sub-pixel SPX including a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. The sub-pixel SPX may be disposed (or formed) on a base layer BSL (refer to Figure 8 Each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may output light of a different color and form one pixel unit.

[0041] According to an embodiment, light of a first color (eg, red) may be output from the first subpixel SPX1 , light of a second color (eg, green) may be output from the second subpixel SPX2 , and light of a third color (eg, blue) may be output from the third subpixel SPX3 .

[0042] The sub-pixel SPX may include a light source. According to an embodiment, at least a portion of the sub-pixel SPX may include a first light emitting element LE1 (refer to Figure 5 ), at least another part of the sub-pixel SPX may include a second light emitting element LE2 (refer to Figure 5 According to the embodiment, by changing the types of the light emitting elements LE1 and LE2 included in the sub-pixel SPX of each region, visibility and process can be improved. This is described in detail below.

[0043] The display area DA may include a first display area A1 and a second display area A2. For example, each of the display devices DD may include a first display area A1 and a second display area A2.

[0044] The first display area A1 may include at least a portion of the inner area of ​​the display area DA. For example, the inner sub-pixel SPX_I (refer to Figure 5 ) may be disposed in the first display area A1. The first display area A1 may be an area inside the display area DA, and may be an area that emits an image displayed inside the display device DD.

[0045] The second display area A2 may include at least a portion of an edge area of ​​the display area DA. Figure 5 ) may be disposed in the second display area A2. The second display area A2 may be an edge area of ​​the display area DA, and may be an area from which an image displayed at each edge of the display device DD is emitted.

[0046] The first display area A1 and the second display area A2 may be disposed adjacent to each other. For example, at least a portion of the second display area A2 may be disposed between the first display area A1 of the first display device DD1 and the first display area A1 of the second display device DD2. At least a portion of the second display area A2 may be disposed between the first display area A1 of the first display device DD1 and the first display area A1 of the third display device DD3. At least a portion of the second display area A2 may be disposed between the first display area A1 of the second display device DD2 and the first display area A1 of the third display device DD3. At least a portion of the second display area A2 may be disposed between the first display area A1 of the third display device DD3 and the first display area A1 of the fourth display device DD4. Therefore, the second display area A2 may be formed adjacent to the bonding area BA between the display devices DD adjacent to each other.

[0047] According to an embodiment, the second display area A2 may be formed adjacent to the bonding area BA and may be completely disposed at the outermost edge of each of the display devices DD (refer to Figure 3 ).

[0048] For example, the second display area A2 may be arranged along the outer line of the first display device DD1. The second display area A2 may completely surround the edge of the first display area A1 of the first display device DD1. The second display area A2 may be arranged along the outer line of the second display device DD2. The second display area A2 may completely surround the edge of the first display area A1 of the second display device DD2. The second display area A2 may be arranged along the outer line of the third display device DD3. The second display area A2 may completely surround the edge of the first display area A1 of the third display device DD3. The second display area A2 may be arranged along the outer line of the fourth display device DD4. The second display area A2 may completely surround the edge of the first display area A1 of the fourth display device DD4. According to an embodiment, the spliced ​​display device TDD may include two or more first display areas A1, and the entire periphery of each of the first display areas A1 is surrounded by the second display area A2.

[0049] The second display area A2 of one of the display devices DD may be disposed adjacent to (e.g., directly adjacent to) the second display area A2 of another adjacent display device DD. For example, the second display area A2 of the first display device DD1 may be disposed adjacent to (e.g., directly adjacent to) the second display areas A2 of the second display device DD2 and the third display device DD3. The second display area A2 of the fourth display device DD4 may be disposed adjacent to (e.g., directly adjacent to) the second display areas A2 of the second display device DD2 and the third display device DD3.

[0050] According to an embodiment, although not shown in the drawings, the spliced ​​display device TDD may further include a non-display area in which the pixel PXL is not disposed. For example, the non-display area may be disposed on at least a portion of the outermost edge of the spliced ​​display device TDD. However, the disclosure is not limited thereto, and the non-display area may not be formed.

[0051] The bonding area BA may be an area between the display devices DD included in the spliced ​​display device TDD. According to an embodiment, the display devices DD may be bonded to each other with the bonding area BA disposed between the display devices DD. For example, various adhesive members may be provided in the bonding area BA. However, the method of bonding the display devices DD is not particularly limited.

[0052] According to an embodiment, at least a portion of the bonding area BA may be disposed between the first display device DD1 and the second display device DD2. For example, the bonding area BA may include a first bonding area disposed between the first display device DD1 and the second display device DD2, a second bonding area disposed between the first display device DD1 and the third display device DD3, a third bonding area disposed between the second display device DD2 and the fourth display device DD4, and a fourth bonding area disposed between the third display device DD3 and the fourth display device DD4.

[0053] In the following, reference is made to Figures 4 to 7 The cross-sectional structure of the spliced ​​display device TDD according to the embodiment is described. The contents that may be repeated with the above contents are briefly described or not repeated.

[0054] Figures 4 to 7 is a schematic cross-sectional view showing a spliced ​​display device according to an embodiment.

[0055] Figure 4 The cross-sectional structures of the first to fourth display devices DD1 to DD4 are schematically shown. Figure 5 The display layer DP of each of the display devices DD is schematically shown. Figure 6 Technical features related to the separation distance between mutually adjacent sub-pixels SPX are schematically shown. Figure 7 It is schematically shown that each display device DD comprises a technical feature of a different light source for each zone. Figure 7 It is along Figure 2 or Figure 3 A schematic cross-sectional view taken along line A to A'.

[0056] Reference Figures 4 to 7 Each of the display devices DD may include a display layer DP and a light control layer LCP. The display layer DP and the light control layer LCP may be formed on a base layer BSL (refer to Figure 8) are disposed adjacent to each other in a thickness direction (eg, a third direction DR3) of the display layer DP. Light emitted from the display layer DP may pass through the light control layer LCP and may be emitted to the outside. According to an embodiment, the display layer DP and the light control layer LCP may be combined with each other. For example, the filling layer FL (refer to Figure 8 ) can be placed between the display layer DP and the light control layer LCP. The method of combining the display layer DP and the light control layer LCP is not particularly limited.

[0057] The display layer DP may include a first display layer DP1 included in the first display device DD1, a second display layer DP2 included in the second display device DD2, a third display layer DP3 included in the third display device DD3, and a fourth display layer DP4 included in the fourth display device DD4. The first to fourth display layers DP1 to DP4 may be disposed adjacent to each other, and the bonding area BA is disposed between the first to fourth display layers DP1 to DP4.

[0058] The display layer DP may be a layer including a light source (eg, a light emitting element LE). For example, the display layer DP may include a first light emitting element LE1. The display layer DP may include a second light emitting element LE2. According to an embodiment, a portion of the display layer DP may include color conversion layers CCL1 and CCL2 (refer to Figure 8 According to an embodiment, the display layer DP may include a base layer BSL and a pixel circuit layer PCL including a pixel circuit for driving the light emitting element LE. The first light emitting element LE1 and the second light emitting element LE2 may be disposed on the pixel circuit layer PCL.

[0059] According to an embodiment, the base layer BSL may be a base substrate or a base member for supporting the display device DD. The base layer BSL may be a rigid substrate of a glass material. According to another embodiment, the base layer BSL may be a flexible substrate that can be bent, folded, curled, etc. The base layer BSL may include an insulating material such as a polymer resin (such as polyimide). However, the disclosure is not particularly limited thereto. The pixel circuit may include a thin film transistor. The pixel circuit may include a driving transistor. The pixel circuit may be electrically connected to the light emitting element LE to provide an electrical signal for the light emitting element LE to emit light.

[0060] According to an embodiment, the display layer DP may include different light sources in the corresponding first display area A1 and second display area A2. The display layer DP may include an internal sub-pixel SPX_I disposed (or formed) in the first display area A1. The display layer DP may include an edge sub-pixel SPX_E disposed (or formed) in the second display area A2. The internal sub-pixel SPX_I may be one or more of the sub-pixels SPX, and the edge sub-pixel SPX_E may be one or more of the sub-pixels SPX. The internal sub-pixel SPX_I and the edge sub-pixel SPX_E may include different light sources.

[0061] For example, in the first display area A1, the internal sub-pixel SPX_I may include a light source other than a light emitting diode including an inorganic material. According to an embodiment, the internal sub-pixel SPX_I may include a first light emitting element LE1 including an organic material. The first light emitting element LE1 may include an organic light emitting diode (OLED). According to another embodiment, the internal sub-pixel SPX_I may include a liquid crystal display (LCD) light source. Hereinafter, for ease of description, the disclosure is described based on an embodiment in which the internal sub-pixel SPX_I includes an OLED.

[0062] For example, in the second display area A2, the edge sub-pixel SPX_E may include a second light emitting element LE2 as a light source including an inorganic material. The second light emitting element LE2 may include a semiconductor layer including an inorganic material. According to an embodiment, the second light emitting element LE2 may be a micro-LED. However, the disclosure is not limited thereto, and the second light emitting element LE2 may be a nano-LED.

[0063] According to an embodiment, the display layer DP may include a light transmission layer OC disposed on the second light emitting element LE2. The light transmission layer OC may be disposed in the second display area A2 to transmit light provided by the second light emitting element LE2. The light transmission layer OC may be an overcoat layer.

[0064] Since it is difficult to form a sub-pixel structure in the edge region between display panels of a conventional spliced ​​display device, a black matrix layer or the like is disposed in the edge region so that the internal structure is not visible and the visibility of the conventional spliced ​​display device may be impaired. However, in the spliced ​​display device TDD according to the embodiment, the second light emitting element LE2 and the light transmission layer OC that transmits the light provided from the second light emitting element LE2 are disposed in the edge region, thereby reducing the risk of impaired visibility.

[0065] According to an embodiment, the light transmission layer OC may include an organic material such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, polyester resin, polyphenylene sulfide resin, or benzocyclobutene (BCB) resin. However, the disclosure is not necessarily limited thereto, and the light transmission layer OC may include an organic material such as silicon oxide (SiO x )、Silicon Nitride(SiN x ), silicon oxynitride (SiO x N y )、Aluminum Nitride(AlN x ), aluminum oxide (AlO x )、ZrO x )、HfO x ) or titanium oxide (TiO x ) various types of inorganic materials.

[0066] According to an embodiment, the internal sub-pixel SPX_I may be disposed in the first display area A1 to provide light, and the edge sub-pixel SPX_E may be disposed in the second display area A2 to provide light. According to an embodiment, the internal sub-pixel SPX_I and the edge sub-pixel SPX_E may be disposed adjacent to each other in an area where the first display area A1 and the second display area A2 are disposed adjacent to each other.

[0067] According to an embodiment, the sub-pixels SPX may be substantially uniformly spaced apart from each other in the first display area A1, the second display area A2, and areas where the first display area A1 and the second display area A2 are adjacent to each other. For ease of description, the description will focus on the first display device DD1 and the second display device DD2 among the display devices DD.

[0068] The first distance 120, the second distance 140, the third distance 160, and the fourth distance 180 defined in the specification may be defined based on a direction along which a plane on which the base layer BSL is disposed extends (e.g., the first direction DR1 or the second direction DR2), and may be defined, for example, based on the shortest distance in which the sub-pixels SPX are spaced apart from each other in a plan view.

[0069] In the first display area A1 of the first display device DD1 and the second display device DD2 , the internal sub-pixels SPX_I may be spaced apart from each other by a first distance 120 .

[0070] In the second display area A2 of the first display device DD1 and the second display device DD2, the edge subpixels SPX_E may be spaced apart from each other by a third distance 160. For example, the subpixel most adjacent to the second display area A2 among the internal subpixels SPX_I and the subpixel most adjacent to the first display area A1 among the edge subpixels SPX_E may be spaced apart from each other by a second distance 140.

[0071] In a region where the first display area A1 and the second display area A2 of the first display device DD1 and the second display device DD2 are adjacent, the edge sub-pixel SPX_E and the internal sub-pixel SPX_I may be spaced apart from each other by a second distance 140 .

[0072] A most adjacent edge subpixel SPX_NE that is most adjacent to the second display device DD2 among the edge subpixels SPX_E of the first display device DD1 and a most adjacent edge subpixel SPX_NE that is most adjacent to the first display device DD1 among the edge subpixels SPX_E of the second display device DD2 may be spaced apart from each other by a fourth distance 180. The most adjacent edge subpixel SPX_NE of each of the display devices DD may be disposed adjacent to (e.g., directly adjacent to) the most adjacent edge subpixel SPX_NE of another adjacent display device DD.

[0073] According to an embodiment, the first distance 120, the second distance 140, the third distance 160, and the fourth distance 180 may be substantially uniform. For example, the first distance 120, the second distance 140, the third distance 160, and the fourth distance 180 may be equal.

[0074] Therefore, in the spliced ​​display device TDD according to the embodiment, the risk of impaired visibility in the area where the display devices DD are adjacent to each other can be reduced. Experimentally, in the case where a plurality of display panels are connected to each other to manufacture the spliced ​​display device TDD, it may be difficult to arrange the sub-pixels SPX at a relatively high density in the area where the display panels are connected to each other to have a high resolution. However, according to the embodiment, the sub-pixels SPX can be formed by using the second light-emitting element LE2 including an inorganic material that requires a relatively small space in the periphery of each of the display devices DD forming the spliced ​​display device TDD.

[0075] In the technical field of display devices, there is a high interest not only in the resolution of the device but also in the problem of reducing process costs. Generally, the process cost of the second light emitting element LE2 including inorganic materials may be higher than the process cost of the first light emitting element LE1 (LCD light source, etc.) including organic materials. The second light emitting element LE2 may be arranged at an edge area of ​​the display area DA to form a high-resolution image throughout the spliced ​​display device TDD, and a light source other than the second light emitting element LE2 (e.g., the first light emitting element LE1) may be arranged in an inner area of ​​the display area DA to reduce process costs.

[0076] As a result, the spliced ​​display device TDD according to the embodiment can be manufactured as a device with high display quality while reducing process costs.

[0077] The light control layer LCP may include a first light control layer LCP1 included in the first display device DD1, a second light control layer LCP2 included in the second display device DD2, a third light control layer LCP3 included in the third display device DD3, and a fourth light control layer LCP4 included in the fourth display device DD4. However, the disclosure is not necessarily limited thereto. The light control layer LCP may be formed integrally and may be manufactured to overlap each of the first to fourth display layers DP1 to DP4 in a plan view.

[0078] The light control layer LCP may be configured to output light of a wavelength different from that of light provided from the display layer DP. For example, the light control layer LCP may include color conversion layers CCL1 and CCL2 configured to change the wavelength of light (refer to Figure 8 ) and / or a color filter CF configured to selectively transmit light of a wavelength band (refer to Figure 8 ).

[0079] In the following, reference is made to Figure 8 and Fig. 9 A structure including light emitting elements LE1 and LE2 in respective first and second display areas A1 and A2 is described. Contents that may overlap with the above contents are briefly described or not repeated.

[0080] First, refer to Figure 8 The structure of the display layer DP in the first display area A1 is described. Figure 8 is a schematic cross-sectional view showing the structure of the display layer DP in the first display area A1. Figure 8 The cross-sectional structure of the first light emitting element LE1 forming the internal sub-pixel SPX_I is schematically shown.

[0081] According to an embodiment, Figure 8 The sub-pixel SPX and the sub-pixel area SPXA shown in FIG. 2 may correspond to the internal sub-pixel SPX_I.

[0082] The sub-pixel SPX may form a sub-pixel region SPXA. The sub-pixel region SPXA may be a region for viewing light of different colors. The sub-pixel region SPXA may include a first sub-pixel region SPXA1 emitting light of a first color as a region forming the first sub-pixel SPX1, a second sub-pixel region SPXA2 emitting light of a second color as a region forming the second sub-pixel SPX2, and a third sub-pixel region SPXA3 emitting light of a third color as a region forming the third sub-pixel SPX3.

[0083] According to an embodiment, the first light emitting element LE1 may be disposed on the pixel circuit layer PCL. According to an embodiment, the display layer DP may include a pixel defining layer PDL and an encapsulation layer TFE.

[0084] The first light emitting element LE1 may include a first electrode ELT1, a light emitting layer EL, and a second electrode ELT2. The light emitting layer EL may be disposed in a region defined by a pixel defining layer PDL. The pixel defining layer PDL may be disposed adjacent to the periphery of the light emitting layer EL. A surface of the light emitting layer EL may be electrically connected to the first electrode ELT1, and another surface of the light emitting layer EL may be electrically connected to the second electrode ELT2.

[0085] According to an embodiment, the light emitting layer EL may include a first light emitting layer EL1 included in the first sub-pixel SPX1, a second light emitting layer EL2 included in the second sub-pixel SPX2, and a third light emitting layer EL3 included in the third sub-pixel SPX3. The first light emitting layer EL1 may emit light of a first color, the second light emitting layer EL2 may emit light of a second color, and the third light emitting layer EL3 may emit light of a third color. According to another embodiment, all of the first to third light emitting layers EL1 to EL3 may emit light of a third color.

[0086] The first electrode ELT1 may be an anode electrode for the light emitting layer EL, and the second electrode ELT2 may be a common electrode (or cathode electrode) for the light emitting layer EL. According to an embodiment, the first electrode ELT1 and the second electrode ELT2 may include a conductive material. For example, the first electrode ELT1 may include a conductive material having a reflective property, and the second electrode ELT2 may include a transparent conductive material, but the disclosure is not limited thereto.

[0087] The light emitting layer EL may have a multi-layer thin film structure including a light generating layer. The light emitting layer EL may include: a hole injection layer for injecting holes; a hole transport layer having excellent hole transport properties and for increasing the chance of recombination of holes and electrons by suppressing the movement of unbound electrons in the light generating layer; a light generating layer for emitting light by recombination of injected electrons and holes; a hole blocking layer for suppressing the movement of unbound holes in the light generating layer; an electron transport layer for easily transporting electrons to the light generating layer; and an electron injection layer for injecting electrons. The light emitting layer EL may emit light based on an electrical signal provided from the first electrode ELT1 and the second electrode ELT2.

[0088] The pixel defining layer PDL may be disposed on the pixel circuit layer PCL to define the position where the light emitting layer EL is arranged. The pixel defining layer PDL may include an organic material. According to an embodiment, the pixel defining layer PDL may include at least one of an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, and a polyimide resin. However, the disclosure is not limited thereto.

[0089] The encapsulation layer TFE may be disposed on the first light emitting element LE1. The encapsulation layer TFE may offset the step difference generated by the first light emitting element LE1 and the pixel defining layer PDL. The encapsulation layer TFE may include a plurality of insulating layers covering the first light emitting element LE1. According to an embodiment, the encapsulation layer TFE may have a structure in which inorganic layers and organic layers are alternately stacked on each other. According to an embodiment, the encapsulation layer TFE may be a thin film encapsulation layer.

[0090] The filling layer FL may be disposed between the display layer DP and the light control layer LCP. The filling layer FL may include an organic material such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, polyester resin, polyphenylene sulfide resin, or benzocyclobutene (BCB) resin. However, the disclosure is not necessarily limited thereto.

[0091] According to embodiments, the light control layer LCP may include a first capping layer CAP1, color conversion layers CCL1 and CCL2, a scattering layer LSL, a bank BNK, a second capping layer CAP2, a light blocking layer LBL, a color filter CF, a third capping layer CAP3, and an upper substrate USUB.

[0092] The first cover layer CAP1 may be disposed on the filling layer FL. The first cover layer CAP1 may cover the first color conversion layer CCL1, the second color conversion layer CCL2, and the scattering layer LSL. The first cover layer CAP1 may include an inorganic material, and the material is not particularly limited.

[0093] The color conversion layers CCL1 and CCL2 may be configured to change the wavelength of light. The color conversion layers CCL1 and CCL2 and the scattering layer LSL may be disposed on the display layer DP. The color conversion layers CCL1 and CCL2 and the scattering layer LSL may be disposed under the color filter CF. The color conversion layers CCL1 and CCL2 and the scattering layer LSL may be disposed between the color filter CF and the display layer DP. The color conversion layers CCL1 and CCL2 and the scattering layer LSL may protrude in a thickness direction (e.g., a third direction DR3) of the base layer BSL and may be disposed in a region surrounded by a dam BNK including an organic material (or patterned in a region surrounded by a dam BNK including an organic material).

[0094] The first color conversion layer CCL1 may include first color conversion particles that convert light of a third color (e.g., blue) into light of a first color (e.g., red). For example, the first color conversion layer CCL1 may include a plurality of first quantum dots QD1 dispersed in a matrix material such as a matrix resin. The first quantum dots QD1 may absorb blue light and emit red light by migrating wavelengths according to energy transition.

[0095] The second color conversion layer CCL2 may include second color conversion particles that convert light of a third color (e.g., blue) into light of a second color (e.g., green). For example, the second color conversion layer CCL2 may include a plurality of second quantum dots QD2 dispersed in a matrix material such as a matrix resin. The second quantum dots QD2 may absorb blue light and emit green light by migrating wavelengths according to energy transition.

[0096] In an embodiment, by causing blue light having a relatively short wavelength in the visible light region to be incident on each of the first quantum dot QD1 and the second quantum dot QD2, the absorption coefficient of the first quantum dot QD1 and the second quantum dot QD2 can be increased. Therefore, the efficiency of light emitted from the first sub-pixel SPX1 and the second sub-pixel SPX2 can be improved, and excellent color reproducibility can be ensured.

[0097] The scattering layer LSL may be provided to effectively use the light of the third color (or blue). For example, the scattering layer LSL may include a scatterer SCT. For example, the scatterer SCT of the scattering layer LSL may include barium sulfate (BaSO 4 ), calcium carbonate (CaCO 3 ), titanium oxide (TiO 2 ), silicon oxide (SiO 2 )、Alumina(Al 2 O 3 )、ZrO 2 ) and zinc oxide (ZnO). For example, the scatterer SCT may be provided in the third sub-pixel SPX3 and may be selectively included in the first color conversion layer CCL1 or the second color conversion layer CCL2. According to an embodiment, a scattering layer LSL constructed of a transparent polymer may be provided by omitting the scatterer SCT.

[0098] According to an embodiment, the first distance 120 defined as the separation distance between the inner sub-pixels SPX_I may be the separation distance between the sub-pixel areas SPXA. For example, according to an embodiment, the first distance 120 may be the width of the light blocking layer LBL in a plan view and may be the width of the bank BNK.

[0099] The second cover layer CAP2 may be disposed on the color conversion layers CCL1 and CCL2 and the scattering layer LSL. The second cover layer CAP2 may cover the first color conversion layer CCL1, the second color conversion layer CCL2, and the scattering layer LSL. The second cover layer CAP2 may include an inorganic material, and the material is not particularly limited.

[0100] The color filter CF may include an organic material such as a colorant and may be configured to selectively transmit light of a specific color. The color filter CF may be disposed on the color conversion layers CCL1 and CCL2 and the scattering layer LSL.

[0101] The color filter CF may include a first color filter CF1 , a second color filter CF2 , and a third color filter CF3 .

[0102] The first color filter CF1 may be a color filter for forming the first sub-pixel SPX1 and may overlap the first sub-pixel area SPXA1 in a plan view. The first color filter CF1 may selectively transmit light of a first color. The first color filter CF1 may be a red color filter and may include a red color filter material.

[0103] The second color filter CF2 may be a color filter for forming the second sub-pixel SPX2 and may overlap the second sub-pixel area SPXA2 in a plan view. The second color filter CF2 may selectively transmit light of a second color. The second color filter CF2 may be a green color filter and may include a green color filter material.

[0104] The third color filter CF3 may be a color filter for forming the third sub-pixel SPX3 and may overlap the third sub-pixel area SPXA3 in a plan view. The third color filter CF3 may selectively transmit light of a third color. The third color filter CF3 may be a blue color filter and may include a blue color filter material.

[0105] The light blocking layer LBL may be disposed between the sub-pixel regions SPXA. The light blocking layer LBL may separate the sub-pixel regions SPXA adjacent to each other. The light blocking layer LBL may overlap the bank BNK and the pixel defining layer PDL in a plan view.

[0106] The light blocking layer LBL may include a light blocking material such as a black matrix, and according to an embodiment, the first to third color filters CF1 to CF3 may be overlapped in a plan view to form the light blocking layer LBL.

[0107] The third capping layer CAP3 may be disposed on the color filter CF. The third capping layer CAP3 may cover the color filter CF. The third capping layer CAP3 may include an inorganic material, and the material is not particularly limited.

[0108] The upper substrate USUB may be disposed on the third cover layer CAP3. The upper substrate USUB may include a material having light transmittance. The upper substrate USUB may be a rigid substrate or a flexible substrate. According to an embodiment, the upper substrate USUB may be a window member or a package substrate.

[0109] Reference Fig. 9, describing the structure of the display layer DP in the second display area A2. Fig. 9 is a schematic cross-sectional view showing the structure of the display layer DP in the second display area A2. Fig. 9 The cross-sectional structure of the second light emitting element LE2 for forming the edge sub-pixel SPX_E is schematically shown.

[0110] According to an embodiment, in Fig. 9 The sub-pixel SPX and the sub-pixel area SPXA shown in FIG. 2 may correspond to the edge sub-pixel SPX_E.

[0111] The display layer DP may include connection electrodes EL1 and EL2 disposed on the pixel circuit layer PCL, a second light emitting element LE2 electrically connected to the connection electrodes EL1 and EL2 , an intermediate layer FIL, and a passivation layer PAS.

[0112] The first connection electrode EL1 and the second connection electrode EL2 may be configured to supply a cathode signal and an anode signal to the second light emitting element LE2. For example, the first connection electrode EL1 may be electrically connected to the first element electrode CNE1 and may be electrically connected to a pixel circuit (e.g., a driving transistor) of the pixel circuit layer PCL. The second connection electrode EL2 may be electrically connected to the second element electrode CNE2 and may be electrically connected to a power line formed on the pixel circuit layer PCL or another layer.

[0113] According to an embodiment, the second light emitting element LE2 disposed in the second display area A2 may be a light emitting diode including an inorganic material. According to an embodiment, the second light emitting element LE2 may include an N-type semiconductor layer SCL1, a P-type semiconductor layer SCL2, and an active layer AL. The second light emitting element LE2 may also include a first element electrode CNE1, a second element electrode CNE2, and an insulating layer INS. According to an embodiment, a portion of the second light emitting element LE2 may include an element color conversion layer ECCL.

[0114] The N-type semiconductor layer SCL1 may be disposed on the active layer AL. The N-type semiconductor layer SCL1 may include an N-type semiconductor. For example, the N-type semiconductor layer SCL1 may include at least one of InAlGaN, GaN, AlGaN, InGaN, AlN, and InN, and may be doped with a first conductive type dopant such as Si, Ge, and Sn. However, the disclosure is not limited thereto.

[0115] The N-type semiconductor layer SCL1 may include a first N-type semiconductor layer SCL1_1 included in the second light emitting element LE2 forming the first subpixel SPX1, a second N-type semiconductor layer SCL1_2 included in the second light emitting element LE2 forming the second subpixel SPX2, and a third N-type semiconductor layer SCL1_3 included in the second light emitting element LE2 forming the third subpixel SPX3.

[0116] The active layer AL may be disposed between the N-type semiconductor layer SCL1 and the P-type semiconductor layer SCL2. The active layer AL may include a single quantum well or a multi-quantum well structure. The location of the active layer AL is not limited.

[0117] The active layer AL may include a first active layer AL1 included in the second light emitting element LE2 forming the first subpixel SPX1, a second active layer AL2 included in the second light emitting element LE2 forming the second subpixel SPX2, and a third active layer AL3 included in the second light emitting element LE2 forming the third subpixel SPX3.

[0118] The P-type semiconductor layer SCL2 may be disposed below the active layer AL. The P-type semiconductor layer SCL2 may include a P-type semiconductor. For example, the P-type semiconductor layer SCL2 may include at least one of InAlGaN, GaN, AlGaN, InGaN, AlN, and InN, and may be doped with a second conductive type dopant such as Ga, B, and Mg. However, the disclosure is not limited thereto.

[0119] The P-type semiconductor layer SCL2 may include a first P-type semiconductor layer SCL2_1 included in the second light emitting element LE2 for forming the first subpixel SPX1, a second P-type semiconductor layer SCL2_2 included in the second light emitting element LE2 for forming the second subpixel SPX2, and a third P-type semiconductor layer SCL2_3 included in the second light emitting element LE2 for forming the third subpixel SPX3.

[0120] The first element electrode CNE1 may be electrically connected to the first connection electrode EL1 and the N-type semiconductor layer SCL1. The first element electrode CNE1 may supply a cathode signal for emitting light together with the second light emitting element LE2.

[0121] The second element electrode CNE2 may be electrically connected to the second connection electrode EL2 and the P-type semiconductor layer SCL2. The second element electrode CNE2 may supply an anode signal for emitting light together with the second light emitting element LE2.

[0122] When a voltage equal to or greater than the threshold voltage is applied to the first and second element electrodes CNE1 and CNE2 of the second light emitting element LE2, electron-hole pairs can be recombined in the active layer AL and the second light emitting element LE2 can emit light. The light emitted from the second light emitting element LE2 can be emitted outward through each of the sub-pixel regions SPXA.

[0123] According to an embodiment, the second light emitting element LE2 of the first subpixel SPX1 and the second light emitting element LE2 of the second subpixel SPX2 may include an element color conversion layer ECCL. According to an embodiment, the second light emitting element LE2 including the element color conversion layer ECCL may be an inorganic light emitting element and may be a red light emitting element or a green light emitting element.

[0124] The element color conversion layer ECCL may include a first element color conversion layer ECCL1 included in the second light emitting element LE2 included in the first sub-pixel SPX1 and a second element color conversion layer ECCL2 included in the second light emitting element LE2 included in the second sub-pixel SPX2.

[0125] The first element color conversion layer ECCL1 may include the same Figure 8 The first color conversion layer ECCL1 described above may have a corresponding material (or substantially the same material). For example, the first element color conversion layer ECCL1 may include a first quantum dot QD1.

[0126] The second element color conversion layer ECCL2 may include the same Figure 8 The second color conversion layer ECCL2 may include a material corresponding to (or substantially the same as) the material described above. For example, the second element color conversion layer ECCL2 may include a second quantum dot QD2.

[0127] According to an embodiment, the element color conversion layer ECCL may include a receiving area ACA formed by the N-type semiconductor layer SCL1 of the second light emitting element LE2 (or included in the N-type semiconductor layer SCL1 of the second light emitting element LE2). For example, the second light emitting element LE2 of the first subpixel SPX1 and the second subpixel SPX2 may include a receiving area ACA, and the element color conversion layer ECCL may be disposed in the receiving area ACA. The receiving area ACA may be a space defined by the N-type semiconductor layer SCL1, and may be formed by removing (or etching) at least a portion of the N-type semiconductor layer SCL1. The receiving area ACA may be a structure for capturing the first quantum dot QD1 and the second quantum dot QD2.

[0128] Therefore, the second light-emitting element LE2 can have an integrated structure in which the first quantum dot QD1 and the second quantum dot QD2 are formed in the element structure, and the color reproducibility of the second light-emitting element LE2 can be further improved, and an additional structure for setting the first quantum dot QD1 and the second quantum dot QD2 may not be required. Therefore, the construction can be effectively set in a relatively narrow area.

[0129] For example, in the case of manufacturing each of the display devices DD to manufacture the spliced ​​display device TDD, it may be difficult to ensure sufficient space in the edge region of the display device DD. In the case where each of the display devices DD has a light-emitting structure including a first quantum dot QD1 and a second quantum dot QD2, an additional structure for setting the first quantum dot QD1 and the second quantum dot QD2 may be difficult to form in the edge region of each of the display devices DD. Therefore, since it is difficult to properly form individual pixels PXL in the edge region, there may be concerns that the visibility of the spliced ​​display device TDD may eventually be impaired. However, as described above, an area that can accommodate the first quantum dot QD1 and the second quantum dot QD2 can be formed in at least a portion of the second light-emitting element LE2 set in the edge region of the display device DD. Therefore, a light-emitting structure with improved color quality can be set by forming the first quantum dot QD1 and the second quantum dot QD2 without consuming too much space.

[0130] According to an embodiment, the second light-emitting element LE2 of the third subpixel SPX3 may not include the first quantum dot QD1 and the second quantum dot QD2. However, the disclosure is not necessarily limited thereto. The second light-emitting element LE2 of the third subpixel SPX3 may also include an accommodation area ACA, so that a material corresponding to the scattering layer LSL may be disposed in the accommodation area ACA.

[0131] The insulating layer INS may be disposed below the N-type semiconductor layer SCL1, the P-type semiconductor layer SCL2, and the active layer AL. The insulating layer INS may be disposed between the N-type semiconductor layer SCL1, the P-type semiconductor layer SCL2, the active layer AL and the element electrodes CNE1 and CNE2, and may include an inorganic material. For example, the insulating layer INS may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlO x ) at least one of. However, the disclosure is not necessarily limited thereto.

[0132] The intermediate layer FIL may be disposed between adjacent second light emitting elements LE2 to ensure structural stability of the second light emitting elements LE2. The intermediate layer FIL may be a filling structure, and may include one or more of the materials described above with reference to the filling layer FL.

[0133] The passivation layer PAS may be disposed on the second light emitting element LE2 and the intermediate layer FIL. The passivation layer PAS may cover the second light emitting element LE2. For example, the passivation layer PAS may encapsulate (or seal) the element color conversion layer ECCL. The passivation layer PAS may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlO x ) at least one of. However, the disclosure is not necessarily limited thereto.

[0134] The above description is an example of the disclosed technical features, and those skilled in the art will be able to make various modifications and changes.Therefore, the disclosed embodiments described above may be implemented individually or in combination with each other.

[0135] Therefore, the embodiments disclosed in the disclosure are not intended to limit the disclosed technical spirit, but to describe the disclosed technical spirit, and the scope of the disclosed technical spirit is not limited by these embodiments. The disclosed protection scope should be interpreted by the claims, and should be interpreted as all technical spirits within the equivalent scope are included in the disclosed scope.

Claims

1. A splicing display device, characterized in that: The splicing display device comprises: A display device, comprising a first display device and a second display device adjacent to each other, wherein the first display device and the second display device each comprise a display area, wherein the display area comprises a first display area and a second display area, wherein: The first display area includes at least a portion of an inner area of ​​the display area, The second display area includes at least a portion of an edge area of ​​the display area, Each of the display devices comprises: an internal sub-pixel disposed on the substrate layer in the first display area; and an edge sub-pixel, arranged on the base layer in the second display area, The edge sub-pixel includes an inorganic light-emitting element including an inorganic material, and The inner sub-pixel includes a light source different from the inorganic light emitting element.

2. The splicing display device according to claim 1, characterized in that: The second display area is disposed between the first display area of ​​the first display device and the first display area of ​​the second display device, and The second display area of ​​the first display device is arranged to be directly adjacent to the second display area of ​​the second display device.

3. The splicing display device according to claim 1, characterized in that: In a plane, the second display area completely surrounds the periphery of the first display area.

4. The splicing display device according to claim 1, characterized in that: The internal sub-pixel includes an organic light emitting diode or a liquid crystal display light source, and The edge sub-pixel further includes a light transmission layer disposed on the inorganic light emitting element.

5. The splicing display device according to claim 1, characterized in that: The interior sub-pixels are spaced apart from each other by a first distance, The inner sub-pixel that is most adjacent to the second display area among the inner sub-pixels and the edge sub-pixel that is most adjacent to the first display area among the edge sub-pixels are spaced apart from each other by a second distance, The first distance and the second distance are equal, The edge sub-pixels are spaced apart from each other by a third distance, and The first distance and the third distance are equal.

6. The splicing display device according to claim 5, characterized in that: An edge sub-pixel of the edge sub-pixels of the first display device that is most adjacent to the second display device and an edge sub-pixel of the edge sub-pixels of the second display device that is most adjacent to the first display device are spaced apart from each other by a fourth distance, and The first distance and the fourth distance are equal.

7. The splicing display device according to claim 1, characterized in that: Each of the display devices further includes a color conversion layer, which is provided on the inorganic light emitting element and the light source different from the inorganic light emitting element and includes quantum dots, and Each of the display devices also includes an upper substrate disposed on the color conversion layer.

8. The splicing display device according to claim 1, characterized in that: The inorganic light emitting element includes an N-type semiconductor layer, a P-type semiconductor layer, an active layer disposed between the N-type semiconductor layer and the P-type semiconductor layer, and an element color conversion layer including quantum dots. The N-type semiconductor layer includes a receiving region in which at least a portion of the N-type semiconductor layer is removed, and The element color conversion layer is disposed in the receiving area.

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