Transparent display device

Abstract

A transparent display device includes: a substrate including a display area on which a plurality of pixels are disposed, each having a transmissive portion and a plurality of sub-pixels, and a non-display area adjacent to the display area; and a plurality of dam regions disposed on the substrate, in which each of the plurality of dam regions includes: a first sub-dam surrounding a portion of the display region; and a second sub-dam disposed on the display area and connected to one side of the first sub-dam.

Description

Technical Field

[0001] The present disclosure relates to a transparent display device. Background Art

[0002] With the advancement of the information age, the demand for display devices for displaying images in various forms has increased. Therefore, various types of display devices such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, organic light emitting display (OLED) devices, micro LED display devices, and quantum dot light emitting display (QLED) devices have been used recently.

[0003] Recently, research on a transparent display device in which a user can view an object or a background located on the opposite side by seeing through the display device is being actively conducted.

[0004] The description provided in this Background section should not be assumed to qualify as prior art merely because it is mentioned in or related to the Background section.The Background section may include information that describes one or more aspects of the subject technology. Summary of the Invention

[0005] These transparent display devices have the potential to be used in a wide variety of fields because they can be viewed as both an image and a background. However, due to the diversity of applications and uses, they need to be manufactured in various types (or various sizes). However, when transparent display devices are manufactured in multiple types (or different sizes), the number of processes increases, resulting in increased manufacturing costs and production energy.

[0006] Accordingly, the inventors of the present disclosure recognized the above-mentioned limitations and other limitations associated with the related art and conducted various experiments to realize a transparent display device that substantially obviates one or more problems due to the limitations and disadvantages of the related art.

[0007] An aspect of the present disclosure is to provide a transparent display device that can be manufactured in various types (or various sizes).

[0008] Furthermore, an aspect of the present disclosure is to provide a transparent display apparatus that can reduce production energy.

[0009] Furthermore, an aspect of the present disclosure is to provide a transparent display device that can be manufactured in various types (or various sizes) and still have reduced or prevented moisture permeation.

[0010] Furthermore, an aspect of the present disclosure is to provide a transparent display apparatus that can prevent or reduce dark spots that occur due to exhaust from a dam even if manufactured in various types (or various sizes).

[0011] Additional features and aspects of the present disclosure are set forth in the following description and, in part, will become apparent from the description or may be learned by practicing the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and obtained by the structure specifically pointed out in the written description or derived therefrom, as well as by the claims and the accompanying drawings.

[0012] To achieve these and other aspects of the inventive concept, as implemented and broadly described herein, a transparent display device according to an embodiment of the present disclosure may include: a substrate including a display area on which a plurality of pixels are arranged and a non-display area adjacent to the display area, the plurality of pixels each having a transmissive portion and a plurality of sub-pixels; and a plurality of dam areas arranged on the substrate, wherein each of the plurality of dam areas includes: a first sub-dam surrounding a portion of the display area; and a second sub-dam arranged on the display area and connected to one side of the first sub-dam.

[0013] According to an embodiment of the present disclosure, a transparent display device may include: a substrate including a display area on which a plurality of pixels are arranged and a non-display area adjacent to the display area, the plurality of pixels each having a transmission portion and a plurality of sub-pixels; a plurality of dam areas surrounding the display area; and a buffer portion arranged inside an area surrounded by the dam areas.

[0014] The transparent display device of the present disclosure includes a plurality of dam areas so that the display panel can be cut into various sizes.

[0015] Furthermore, the transparent display device of the present disclosure can be manufactured in various types (or different sizes) without an additional mask process, which can result in lower production energy compared to producing the transparent display device in various types through different production processes.

[0016] Furthermore, the transparent display device of the present disclosure is provided in such a manner that a moisture permeation path in a cut portion is interrupted, so that moisture permeation can be reduced or prevented even when the product is manufactured in a variety of types (different sizes).

[0017] In addition, the transparent display device of the present disclosure provides a buffer portion between the first sub-dam and the second sub-dam adjacent to the cutting portion, so that exhaust gas emitted from the first sub-dam and / or the second sub-dam can be stored in the buffer portion, thereby preventing or reducing the occurrence of dark spots.

[0018] Other systems, methods, features, and advantages will be or will become apparent to those skilled in the art upon review of the following figures and detailed description. It is intended that all such additional systems, methods, features, and advantages be included herein, be within the scope of the present disclosure, and be protected by the appended claims. Nothing in this section should be construed as limiting these claims. Additional aspects and advantages are discussed below in conjunction with the embodiments of the present disclosure.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings may be included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The accompanying drawings illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0021] Figure 1 is a schematic plan view of a transparent display device according to an example embodiment of the present disclosure.

[0022] Figure 2 According to an example embodiment of the present disclosure Figure 1 An enlarged top view of portion A is shown.

[0023] Figure 3 According to an example embodiment of the present disclosure Figure 2 Schematic cross-sectional view along line II' is shown.

[0024] Figure 4 According to an example embodiment of the present disclosure Figure 2 Schematic cross-sectional view along line II-II' is shown.

[0025] Figure 5 According to an example embodiment of the present disclosure Figure 2 An enlarged plan view of portion B is shown.

[0026] Figure 6 According to an example embodiment of the present disclosure Figure 5 Schematic cross-sectional view along line III-III' is shown.

[0027] Figure 7 is a schematic plan view of a transparent display device according to another example embodiment of the present disclosure.

[0028] Figure 8 According to another exemplary embodiment of the present disclosure Figure 7 A schematic cross-sectional view along line IV-IV' is shown.

[0029] Figure 9 is a diagram illustrating a transparent display device according to another exemplary embodiment of the present disclosure. Figure 7 A cross-sectional view along line IV-IV' is shown.

[0030] Throughout the drawings and the detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. The relative size and depiction of these elements may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0031] Reference will now be made in detail to embodiments of the present disclosure, examples of which may be shown in the accompanying drawings. To the extent possible, the same reference numerals will be used throughout to refer to the same or similar parts. The progression of processing steps and / or operations described are examples; however, the order of steps and / or operations is not limited to the order set forth herein and may be changed as is known in the art, except that steps and / or operations must occur in a particular order. Similar reference numerals designate similar elements throughout. The names of corresponding elements used in the following description may be selected solely for ease of writing the description and may therefore differ from the names used in the actual product.

[0032] The advantages and features of the present disclosure and the methods for achieving these advantages and features will become clear by reference to the example embodiments described below in conjunction with the accompanying drawings. However, the present disclosure can be implemented in different forms and should not be construed as being limited to the example embodiments set forth herein. On the contrary, these example embodiments can be provided so that: the present disclosure will be sufficiently thorough and complete to help those skilled in the art fully understand the scope of the present disclosure. In addition, the present disclosure is limited only by the scope of the appended claims.

[0033] The shapes, sizes, proportions, angles, and quantities disclosed in the drawings for describing various exemplary embodiments of the present disclosure are given by way of example only, and the present disclosure is not limited to the details shown. Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0034] Like reference numerals refer to like elements throughout. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted or may be briefly provided.

[0035] When using the terms “including,” “having,” “comprising,” “containing,” “consisting of,” “made of,” “formed of,” etc. described in this specification, another component may be added unless a more restrictive term such as “only” is used. Terms in the singular form may include plural forms unless otherwise indicated.

[0036] When explaining an element, the element is interpreted as including an error range or a tolerance range although there is no explicit description of such error or tolerance range.

[0037] When describing a positional relationship, for example, when using "on," "above," "below," "above," "below," "near," "close to," "adjacent," "adjacent," or the like to describe the positional relationship between two components, one or more other components may be disposed between the two components, unless more restrictive terms such as "immediately," "directly," or "closely" are used. For example, when a structure is described as being "on," "above," "below," "above," "below," "below," "near," or "close to" another structure, the description should be interpreted as including situations where these structures are in contact with each other and situations where a third structure is disposed. In addition, the terms "left side," "right side," "top," "bottom," "downward," "upward," "upper," "lower," or the like refer to an arbitrary reference system.

[0038] When describing temporal relationships, for example, when describing a temporal sequence as, for example, "after," "followed," "next," and "before," discontinuities may be included unless more restrictive terms such as "only," "immediately," or "directly" are used.

[0039] It will be understood that although the terms "first," "second," "A," "B," "(a)," and "(b)," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. For example, a first element may be referred to as a second element without departing from the scope of this disclosure. Furthermore, when an element or layer is described as being "connected," "coupled," or "adhered" to another element or layer, the element or layer may be connected or adhered not only directly to the other element or layer, but also indirectly to the other element or layer using one or more intermediate elements or layers "disposed" between the elements or layers, unless otherwise specified.

[0040] The “X-axis direction,” “Y-axis direction,” and “Z-axis direction” should not be interpreted as having only a geometric relationship of being perpendicular to each other, but may have broader directivities within a range in which the elements of the present disclosure can function.

[0041] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, the meaning of "at least one of the first, second, and third items" refers to all combinations of items listed from two or more of the first, second, and third items, as well as the first, second, or third item.

[0042] The features in the various embodiments of the present disclosure may be partially or entirely coupled or combined with each other, and may be technically interoperable and driven in various ways, as will be fully understood by those skilled in the art. The embodiments of the present disclosure may be implemented independently of each other or may be implemented together in a mutually dependent relationship.

[0043] Unless otherwise defined, the 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 the example embodiments belong. It will also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, for example, and should not be interpreted in an idealized or overly formal sense unless expressly defined as such herein. For example, the term "component" or "unit" may apply, for example, to a separate circuit or structure, an integrated circuit, a computing block of a circuit device, or any structure configured to perform the described function, as would be understood by one of ordinary skill in the art.

[0044] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, all components of each transparent display device according to all embodiments of the present disclosure are operatively coupled and configured.

[0045] Figure 1 is a schematic plan view of a transparent display device according to an example embodiment of the present disclosure, Figure 2 yes Figure 1 An enlarged top view of section A is shown, Figure 3 yes Figure 2 A schematic cross-sectional view of line II' is shown, and Figure 4 yes Figure 2 Schematic cross-sectional view along line II-II' is shown.

[0046] Hereinafter, the Y-axis direction indicates a direction parallel to the first line SL1 (e.g., data line) (e.g., first direction), the X-axis direction indicates a direction parallel to the second line SL2 (e.g., gate line) (e.g., second direction), and the Z-axis direction indicates a thickness direction of the transparent display device 100 (e.g., third direction).

[0047] Now refer to Figures 1 to 4According to an exemplary embodiment of the present disclosure, a transparent display device 100 includes a substrate 110 having a display area DA and a non-display area NDA (or a border area), and a plurality of dam areas 120. The plurality of dam areas 120 are disposed on the substrate 110. The display area DA includes a plurality of pixels P each having a transmissive portion TA and a plurality of sub-pixels SP, and the non-display area NDA is adjacent to the display area DA (e.g., at least partially surrounds the display area DA). According to one example, each of the plurality of dam areas 120 may be configured as a closed loop extending from the non-display area NDA (or border area) to the display area DA. Therefore, a portion of each of the plurality of dam areas 120 may be disposed in the non-display area NDA, and another portion (or the remaining portion) may be disposed in the display area DA.

[0048] Specifically, according to one example, each of the plurality of dam areas 120 may include a first sub-dam 1211 surrounding a portion of the display area DA and a second sub-dam 1212 disposed on the display area DA and connected to one side of the first sub-dam 1211. In one example, the second sub-dam 1212 may be disposed within the area surrounded by the first sub-dam 1211, spaced apart from one side of the first sub-dam 1211, and both ends of the second sub-dam 1212 may be connected to a portion of the first sub-dam 1211 other than the one side of the first sub-dam 1211. Thus, the second sub-dam 1212 may be connected to one side of the first sub-dam 1211. The plurality of dam areas 120 may include a first dam 121 disposed in the left portion of the transparent display device 100, and a second dam 122 adjacent to the first dam 121 and disposed in the right portion of the transparent display device 100. According to one example, the first dam 121 may include the first sub-dam 1211 and the second sub-dam 1212. According to one example, the second dam 122 may include a first sub-dam 1221 and a second sub-dam 1222 .

[0049] On the other hand, each of the plurality of dam areas 120 provided as a closed loop may mean that the display area DA is partially surrounded by the dam area 120, such as Figure 1 As shown. According to an example, the display area DA may include a first display area DA1 and a second display area DA2 disposed adjacent to the first display area DA1. Therefore, the display area DA may have a structure divided by a plurality of dam areas 120 having a closed structure. For example, as Figure 1 As shown, the transparent display device 100 according to an example embodiment of the present disclosure may include two dam areas 120 (or a first dam 121 and a second dam 122 ), and may include two display areas DA having the same or different areas (or sizes) divided by each dam area 120 .

[0050] When cutting is performed between the two dam areas 120, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be divided into two transparent display devices having the same or different areas (or sizes). For example, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be divided into a first transparent display device 101 having a first display area DA1 and a second transparent display device 102 having a second display area DA2, and the second display area DA2 can have the same or different areas (or sizes) as the first display area DA1. Therefore, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be manufactured into various sizes (or different sizes) by providing a plurality of dam areas 120, so that the display panel can be cut into the same or different sizes. However, if the transparent display device 100 according to the exemplary embodiment of the present disclosure is not divided by the cutting device, it can also be implemented as a single transparent display device.

[0051] like Figure 1 As shown, the transparent display device 100 according to an exemplary embodiment of the present disclosure can be configured to include two dam areas 120, and thus can be implemented as a first transparent display device 101 having a first area and a second transparent display device 102 having a second area equal to or different from the first area. The display panel may include a substrate 110 and an opposing substrate 200 facing the substrate 110 and bonded to the substrate 110.

[0052] Therefore, in the transparent display apparatus 100 according to the exemplary embodiment of the present disclosure, production energy may be reduced compared to transparent display apparatuses produced in various types (or various sizes) through different production processes (or manufacturing processes).

[0053] Furthermore, even if the transparent display device 100 according to the exemplary embodiment of the present disclosure is divided into the first transparent display device 101 and the second transparent display device 102, the plurality of dam areas 120 (or the first dam 121 or the second dam 122) cover the edges of each of the first transparent display device 101 and the second transparent display device 102 in a closed loop structure (or closed structure), thereby reducing or preventing moisture penetration. Therefore, even if the transparent display device 100 according to the exemplary embodiment of the present disclosure is cut (or divided) into a plurality of transparent display devices, the reliability of each of the plurality of transparent display devices against moisture penetration can be improved.

[0054] On the other hand, the transparent display device 100 according to an example embodiment of the present disclosure may include a buffer portion BP provided inside the area surrounded by the dam area 120 (or the first dam 121 or the second dam 122). The buffer portion BP is a space for inducing exhaust gas contained in the dam area 120. The buffer portion BP is a space different from the space where cutting is performed. For example, the buffer portion BP is a space for storing exhaust gas emitted from the dam area. Therefore, the buffer portion BP may be expressed in terms of an exhaust gas storage area. The buffer portion BP may include a first buffer portion BP1 provided inside the area surrounded by the first dam 121, and a second buffer portion BP2 provided inside the area surrounded by the second dam 122. In one example, the first buffer portion BP1 may be provided between the first sub-dam 1211 and the second sub-dam 1212. According to one example, the second buffer portion BP2 may be provided between the first sub-dam 1221 and the second sub-dam 1222. The buffer portion BP may be a space for storing exhaust gas from the dam area 120 (or the first dam 121 or the second dam 122). Since the buffer portion BP is provided by reference to Figure 3 The dam area 120 disposed at the left and right portions of the emission area EA forms a space, so it may be represented by the term "buffer area".

[0055] In one example, the buffer portion BP may be vacuumed. By setting the buffer portion BP to be vacuumed, the exhaust gas contained in the dam area 120 (or the first dam 121 or the second dam 122) can be more easily induced into the vacuumed buffer portion BP, rather than invading the light-emitting element layer E (or organic light-emitting layer) included in each of the multiple pixels P (or multiple sub-pixels SP). If the exhaust gas intrudes into the light-emitting element layer E (or organic light-emitting layer) included in each of the multiple pixels P (or multiple sub-pixels SP), the light-emitting element layer E (or organic light-emitting layer) may be damaged, and the corresponding pixel P (or sub-pixel SP) may not be driven and may be seen as a dark spot by the user.

[0056] However, the transparent display device 100 according to the example embodiment of the present disclosure has a buffer portion BP between the first sub-dam 1211 (or the first sub-dam 1221) and the second sub-dam 1212 (or the second sub-dam 1222), so that the exhaust gas emitted from the first sub-dam 1211 (or the first sub-dam 1221) and / or the second sub-dam 1212 (or the second sub-dam 1222) can be released into the buffer portion BP, thereby preventing or reducing damage to the organic light-emitting layer, thereby preventing or reducing the occurrence of dark spots.

[0057] On the other hand, Figure 3As shown, the organic light emitting layer 116 in the light emitting area EA is sealed by the cathode electrode 117 and the encapsulation layer 118 on the organic light emitting layer 116 , so the exhaust gas released in the buffer portion BP may not penetrate into the organic light emitting layer 116 .

[0058] In the following, reference is made to Figures 1 to 4 , the transparent display device 100 according to an example embodiment of the present disclosure will be described in more detail.

[0059] Reference Figure 1 According to an exemplary embodiment of the present disclosure, a transparent display device 100 may include a source driver integrated circuit (hereinafter, IC) 130, a flexible film 140, a plurality of circuit boards 150, and a display panel including a substrate 110 having a plurality of gate drivers GD. Although not shown, the plurality of circuit boards 150 may be connected to a timing controller via a cable.

[0060] The display panel may include a substrate 110 and an opposite substrate 200 (eg Figure 3 shown).

[0061] The substrate 110 may include thin film transistors and may be a transistor array substrate, a lower substrate, a base substrate, or a first substrate. The substrate 110 may be a transparent glass substrate or a transparent plastic substrate. For example, the substrate 110 may be a transparent glass substrate. Hereinafter, the substrate 110 will be referred to as the first substrate.

[0062] The opposite substrate 200 may face the first substrate 110 and may be located in the dam region 120 via the first dam 121, the second dam 122, and the filling member (RF, such as Figure 6 The opposing substrate 200 is bonded to the first substrate 110 (as shown). For example, the opposing substrate 200 may be smaller than the first substrate 110 and may face and be bonded to a portion of the first substrate 110 other than the pad portion. The opposing substrate 200 may be an upper substrate, a second substrate, or an encapsulation substrate. The opposing substrate 200 may be bonded to the first side of the first substrate 110 through a substrate bonding process facilitated by an adhesive member. Hereinafter, the opposing substrate 200 is defined as a second substrate.

[0063] According to one example, the dam area 120 may include a first dam 121 and a second dam 122. Each of the first dam 121 and the second dam 122 may be disposed between the first substrate 110 and the second substrate 200. Thus, the first substrate 110 and the second substrate 200 may be bonded to face and oppose each other via the first dam 121 and the second dam 122. For example, each of the first dam 121 and the second dam 122 may include a thermosetting transparent adhesive or a photocurable transparent adhesive. Each of the first dam 121 and the second dam 122 may include an absorbent material (not shown) for absorbing external moisture or humidity penetrating toward the display area DA.

[0064] According to one example, the dam area 120 may be provided in the non-display area NDA and extend from the non-display area NDA to the display area DA. Figure 3 As shown, the dam area 120 may be provided to fill the gap between the first substrate 110 and the second substrate 200. Therefore, the dam area 120 (or the first dam 121 and the second dam 122) may prevent or reduce moisture or the like from penetrating toward the display area DA through the gap between the first substrate 110 and the second substrate 200.

[0065] The filling member RF may be disposed adjacent to the dam area 120. The filling member RF may be disposed to fill a gap between the first substrate 110 and the second substrate 200, thereby supporting the first substrate 110 and the second substrate 200. Therefore, the filling member RF may prevent or reduce the first substrate 110 and the second substrate 200 from being easily deformed by an external force.

[0066] On the other hand, the filling member RF or the dam area 120 can be provided between the organic light-emitting layer 116 formed on the first substrate 110 and the second substrate 200 to prevent or reduce external moisture or humidity from penetrating through the second substrate 200 and reaching the organic light-emitting layer 116. In other words, each of the filling member RF and the dam area 120 can have a barrier function to prevent or reduce moisture penetration. Each of the filling member RF and the dam area 120 can also include an absorbent material to absorb water or moisture to enhance the moisture barrier effect. For example, the absorbent material can be a getter.

[0067] Alternatively, the filling member RF may include a thermosetting transparent adhesive or a light-curing transparent adhesive. In this case, the filling member RF can be used to bond the first substrate 110 to the second substrate 200 together with the dam area 120. This further improves the bonding strength between the first substrate 110 and the second substrate 200. Since each of the plurality of dam areas 120 partially surrounds the display area DA, the filling member RF can be positioned so as to be surrounded by the dam areas 120. The dam areas 120 can overlap with the plurality of pixels P by being partially disposed in the display area DA.

[0068] According to one example, the dam area 120 may include an opaque material, but is not necessarily limited thereto and may include a transparent material. According to one example, the filling member RF is disposed in the display area DA, and thus may include a transparent material to improve transmittance of emitted light.

[0069] Refer again Figure 1 The gate driver GD provides a gate signal to the gate line according to the gate control signal input by the timing controller. When the source driver IC 130 is manufactured as a driver chip, the source driver IC 130 can be packaged in the flexible film 140 using a chip on film (COF) method or a chip on plastic (COP) method.

[0070] Pads such as power pads and data pads may be formed in the non-display area NDA of the display panel. Wires connecting the pads to the source driver IC 130 and wires connecting the pads to the circuit board 150 may be formed in the flexible film 140. The flexible film 140 may be attached to the pads using an anisotropic conductive film, so that the pads can be connected to the wires of the flexible film 140.

[0071] The first substrate 110 according to an example may include a display area DA and a non-display area NDA.

[0072] The display area DA is an area where an image is displayed and may be a pixel array area, an active area, a pixel array unit, a display unit, or a screen. For example, the display area DA may be disposed at a central portion of the display panel (or the first substrate 110).

[0073] The display area DA according to an example may include a gate line, a data line, a pixel driving power line, and a plurality of pixels P. Each of the plurality of pixels P may include a plurality of sub-pixels SP and a transmission portion TA (eg, Figure 2 (As shown). A plurality of sub-pixels SP can be defined by gate lines and data lines. A transmissive portion TA is disposed adjacent to the plurality of sub-pixels SP. The transmissive portion TA is configured to allow light to pass through both the front and back sides of the display panel. Thus, a user positioned in front of the display panel can view an image, background, or the like positioned on the back side of the display panel through the transmissive portion TA.

[0074] Reference Figure 2 , each of the plurality of sub-pixels SP may be defined as an area of a minimum unit that emits actual light.

[0075] According to one example, at least four sub-pixels SP disposed adjacent to each other among a plurality of sub-pixels SP and a transmissive portion TA constitute a unit pixel P. A unit pixel may include a red pixel, a green pixel, a blue pixel, a white pixel, and a transmissive portion TA, but is not limited thereto. In one example, a unit pixel may include at least one red pixel, at least one green pixel, at least one blue pixel, at least one white pixel, and at least one transmissive portion TA.

[0076] In another example, three adjacent sub-pixels SP among the plurality of sub-pixels SP and one transmissive portion TA constitute one unit pixel. One unit pixel may include but is not limited to at least one red pixel, at least one green pixel, at least one blue pixel, and one transmissive portion TA.

[0077] Each of the plurality of sub-pixels SP may include a thin film transistor and a light emitting portion connected to the thin film transistor. The light emitting portion may include a light emitting element layer (or organic light emitting layer) interposed between an anode electrode (or first electrode) and a cathode electrode (or second electrode).

[0078] The light-emitting element layers respectively arranged in the plurality of sub-pixels SP may individually emit their respective lights of different colors from each other or collectively emit white light. According to an example, when the light-emitting element layers of the plurality of sub-pixels SP collectively emit white light, each of the red sub-pixel, the green sub-pixel, and the blue sub-pixel may include a color filter (or wavelength conversion member) for converting the white light into its corresponding light of a different color. In this case, the white sub-pixel according to the example may not include a color filter. In the transparent display device 100 according to an example embodiment of the present disclosure, the red sub-pixel may be the first sub-pixel SP1, the white sub-pixel may be the second sub-pixel SP2, the green sub-pixel may be the third sub-pixel SP3, and the blue sub-pixel may be the fourth sub-pixel SP4.

[0079] When the gate signal is input from the gate line, each sub-pixel SP provides a predetermined current to the organic light emitting element according to the data voltage of the data line by using a thin film transistor. For this reason, the light emitting portion of each sub-pixel can emit light with a predetermined brightness according to the predetermined current. Figure 3 The structure of each sub-pixel SP is described.

[0080] The non-display area NDA may be an area where no image is displayed, and may be a peripheral circuit area, a signal supply area, a non-active area, or a frame area. The non-display area NDA may be configured to surround the display area DA. For example, the non-display area NDA may be configured to surround the display area DA.

[0081] According to an exemplary embodiment of the present disclosure, the transparent display device 100 may include a plurality of gate drivers GD disposed on the non-display area NDA. Figure 1 As shown, a plurality of gate drivers GD may be arranged in the non-display area NDA along a first direction (Y-axis direction). The plurality of gate drivers GD may be arranged parallel to each other with the display area DA interposed therebetween, but is not necessarily limited thereto.

[0082] Each of the plurality of gate drivers GD provides a gate signal to the gate line according to a gate control signal input from a timing controller connected to the plurality of circuit boards 150. Each of the plurality of gate drivers GD may be formed in the non-display area NDA in a manner similar to a gate driver GIP in a panel on any outer side of the display area DA, as shown in FIG. Figure 1 As shown. Alternatively, multiple gate drivers GD can be made of a driver chip, mounted on a flexible film, and attached to the non-display area NDA on both sides of the display area DA of the display panel by a TAB (tape automated bonding) method. The gate driver GD according to one example may include multiple gate driver circuits (or GIP circuits) and multiple GIP wirings. In one example, the GIP wirings may include multiple signal wirings and multiple power wirings.

[0083] A plurality of gate drivers GD may be respectively provided on the left side of the display area DA (e.g., the second non-display area NDA2) and the right side of the display area DA (e.g., the third non-display area NDA3). According to one example, the plurality of gate drivers GD may be connected to the plurality of pixels P and the plurality of wirings (or the plurality of second lines SL2) for providing power and / or signals to each of the plurality of pixels P. Figure 1 As shown, the transparent display device 100 according to an example embodiment of the present disclosure may further include a plurality of first lines SL1 crossing the plurality of second lines SL2 .

[0084] The plurality of second lines SL2 may extend along a second direction (X-axis direction). Each of the plurality of second lines SL2 may include at least one gate line GL (or scan line GL). The second direction (X-axis direction) may refer to a direction parallel to the gate line GL.

[0085] Hereinafter, when the second line SL2 includes a plurality of lines, one second line SL2 may refer to a group of signal lines including the plurality of lines. For example, when the second line SL2 includes two scan lines, one second line SL2 may refer to a group of signal lines including the two scan lines.

[0086] The plurality of first lines SL1 may extend along a first direction (Y-axis direction). The plurality of first lines SL1 may intersect with the plurality of second lines SL2. Each of the plurality of first lines SL1 may be connected to at least one of a plurality of pads, a pixel power shorting bar EVDD, and a common power shorting bar EVSS provided in the first non-display area NDA1. The pixel power shorting bar EVDD and the common power shorting bar EVSS may be provided in the first non-display area NDA1 provided between the pad area PA and the display area DA relative to the display area DA, and in the fourth non-display area NDA4 provided facing the pad area PA. The first direction (X-axis direction) may be a direction parallel to the data line.

[0087] The pixel power shorting bar EVDD may include a first pixel power shorting bar EVDD1 disposed in the first non-display area NDA1 and a second pixel power shorting bar EVDD2 disposed in the fourth non-display area NDA4. The first pixel power shorting bar EVDD1 and the second pixel power shorting bar EVDD2 may be disposed parallel to the second direction (X-axis direction) with the display area DA interposed therebetween.

[0088] The common power shorting bar EVSS may include a first common power shorting bar EVSS1 disposed in the first non-display area NDA1 and a second common power shorting bar EVSS2 disposed in the fourth non-display area NDA4. The first common power shorting bar EVSS1 and the second common power shorting bar EVSS2 may be disposed parallel to the second direction (X-axis direction) with the display area DA interposed therebetween. According to an example, the first common power shorting bar EVSS1 and the second common power shorting bar EVSS2 may be disposed closer to an edge of the first substrate 110 than the first pixel power shorting bar EVDD1 and the second pixel power shorting bar EVDD2.

[0089] The plurality of first lines SL1 may include pixel power lines connected to the pixel power shorting bar EVDD and common power lines connected to the common power shorting bar EVSS. In example embodiments, the plurality of first lines SL1 may further include a plurality of data lines and reference lines.

[0090] Hereinafter, when the first line SL1 includes a plurality of lines, one first line SL1 may refer to a signal line group consisting of the plurality of lines. For example, when the first line SL1 includes two data lines, a pixel power line, a common power line, and a reference line, one first line SL1 may refer to a signal line group including the two data lines, the pixel power line, the common power line, and the reference line.

[0091] The pixel P is disposed to overlap at least one of the first line SL1 and the second line SL2 and emits predetermined light to display an image. The emission area EA may correspond to an area where the pixel P emits light. According to one example, the emission area EA may be disposed adjacent to the transmissive portion TA.

[0092] Reference Figure 2 , each pixel P may include a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. The first sub-pixel SP1 may be configured to include a first light-emitting area EA that emits red light, the second sub-pixel SP2 may be configured to include a second light-emitting area that emits white light, the third sub-pixel SP3 may be configured to include a third light-emitting area that emits green light, and the fourth sub-pixel SP4 may be configured to include a fourth light-emitting area that emits blue light. Figure 2 , the first to fourth sub-pixels SP1, SP2, SP3, and SP4 included in a pixel P can be configured as a 2×2 structure. For example, the first sub-pixel SP1 emitting red light, the second sub-pixel SP2 emitting white light, the third sub-pixel SP3 emitting green light, and the fourth sub-pixel SP4 emitting blue light can be set to a 2×2 structure. Specifically, the fourth sub-pixel SP4 emitting blue light and the first sub-pixel SP1 emitting red light can be arranged adjacent to each other in the second direction (X-axis direction), and the third sub-pixel SP3 emitting green light and the second sub-pixel SP2 emitting white light can be arranged adjacent to each other in the second direction (X-axis direction). Here, the third sub-pixel SP3 and the second sub-pixel SP2 can be respectively arranged relative to Figure 2 The fourth sub-pixel SP4 and the first sub-pixel SP1 may be disposed below the fourth sub-pixel SP4 (e.g., adjacently in the first direction (Y-axis direction)). Furthermore, a transmissive portion TA may be disposed adjacently to the right side of the first sub-pixel SP1 and the second sub-pixel SP2. However, the arrangement of the first to fourth sub-pixels SP1, SP2, SP3, and SP4 may be modified depending on the design of the first substrate 110 (or the second substrate 200). For example, the first to fourth sub-pixels SP1, SP2, SP3, and SP4 may be arranged in a row in the first direction (Y-axis direction), and the transmissive portion TA may be disposed on one side of each of the first to fourth sub-pixels SP1, SP2, SP3, and SP4.

[0093] The transparent display device 100 according to an exemplary embodiment of the present disclosure is configured so that the light emitting element emits white light, and thus, as Figure 2 The second sub-pixel SP2 of the white sub-pixel shown may not be provided with a color filter. On the other hand, the fourth sub-pixel SP4 may be provided with a blue color filter 210 ( Figure 3 As shown), so that blue light is emitted, the first sub-pixel SP1 may be provided with a red color filter 211 ( Figure 3 As shown), so that red light is emitted, and the third sub-pixel SP3 may be provided with a green color filter so that green light is emitted.

[0094] In the following, reference is made to Figure 2 and Figure 3 , a pixel P of the transparent display device 100 according to an example embodiment of the present disclosure will be described.

[0095] Reference Figure 2 and Figure 3 , each of the plurality of pixels P provided in the display area DA may include a plurality of sub-pixels SP and a transmission area TA. The transmission portion TA may be provided adjacent to each of the first sub-pixel SP1 and the second sub-pixel SP2, as shown in FIG. Figure 2 As shown. Figure 3 , the sub-pixel SP provided with the dam area 120 and the buffer portion BP is illustrated, but the filling member RF may be provided in the sub-pixel SP provided in the display area DA instead of the dam area 120. However, as Figure 4 As shown, both the filling member RF and the dam area 120 may not be provided in the area where the space CP is provided. The space CP may be a portion cut by a cutting device (such as a laser or a grinding wheel). For example, when the cutting device cuts the space CP, the transparent display device 100 according to the exemplary embodiment of the present disclosure may be divided into a first transparent display device 101 and a second transparent display device 102. Figure 1 , it is shown that the transparent display device 100 according to an example embodiment of the present disclosure is configured to be divided into two transparent display devices having the same area (or size), but it is not limited thereto and can be configured to be divided into two transparent display devices having different areas (or sizes).

[0096] According to one example, the space CP may be formed between the first sub-dam 1211a of the first dam 121 and the first sub-dam 1221a of the second dam 122. The region between the first sub-dam 1211a of the first dam 121 and the first sub-dam 1221a of the second dam 122 where the space CP is formed may be a cutting margin area CMA for cutting. Figure 4 As shown, the cutting margin area CMA may be a space area because neither the filling member RF nor the dam area 120 is provided in the CMA. In one example, the space area may be a vacuum. On the other hand, as shown Figure 4 As shown, since the cutting margin area CMA is a spatial area, the cutting margin area CMA may be connected to the undercut portion UC or the space CP of some undercut portions among the plurality of undercut portions UC.

[0097] Therefore, the transparent display device 100 according to the example embodiment of the present disclosure can have a reduction in manufacturing cost due to material saving because neither the filling member RF nor the dam area 120 is formed in the space CP (or the cutting margin area CMA), and can also have a reduced defect rate because the area where the filling member RF and the dam area 120 are not set can be cut to assist in cutting.

[0098] On the other hand, since the structure of the sub-pixel SP provided with the filling member RF is the same as the structure of the sub-pixel SP provided with the dam region 120, as shown in FIG. Figure 3 As shown, its description will be replaced by the description of the sub-pixel SP provided with the dam region 120 .

[0099] Refer again Figure 3 , each of the plurality of sub-pixels SP may be disposed on the first substrate 110 and may include a buffer layer BL to prevent or reduce moisture penetration into the thin film transistor 112 .

[0100] In addition, each subpixel SP according to an exemplary embodiment of the present disclosure includes an inorganic layer 111, a planarization layer 113 disposed on the inorganic layer 111, an anode electrode 114 (or a first electrode 114) disposed on the planarization layer 113, a bank 115, an organic light emitting layer 116, a cathode electrode 117 (or a second electrode 117), and an encapsulation layer 118. The inorganic layer 111 is disposed on an upper surface of the buffer layer BL and includes a gate insulating layer 111a, an interlayer insulating layer 111b, a first passivation layer 111c, and a second passivation layer 111d.

[0101] The inorganic layer 111 may be provided with a thin film transistor 112 for driving the sub-pixel SP. The inorganic layer 111 may also be referred to as a circuit element layer. A buffer layer BL may be included in the inorganic layer 111 along with the gate insulating layer 111a, the interlayer insulating layer 111b, the first passivation layer 111c, and the second passivation layer 111d. An anode electrode 114, an organic light-emitting layer 116, and a cathode electrode 117 may be included in the light-emitting element.

[0102] A buffer layer BL may be formed between the first substrate 110 and the gate insulating layer 111a to protect the thin film transistor 112. A pixel power line EVDD or a wiring electrically connected to the pixel power line EVDD may be disposed between the buffer layer BL and the first substrate 110. The buffer layer BL may be disposed entirely on one surface (or front surface) of the first substrate 110. The buffer layer BL may be used to prevent or reduce diffusion of materials contained in the first substrate 110 into the transistor layer during high-temperature processes in the manufacturing process of the thin film transistor. Alternatively, the buffer layer BL may be omitted as appropriate.

[0103] The thin film transistor 112 according to an example may include an active layer 112 a , a gate electrode 112 b , a source electrode 112 c , and a drain electrode 112 d .

[0104] The active layer 112 a may include a channel region, a drain region, and a source region formed in a thin film transistor region of a circuit region of the pixel P. The drain region and the source region may be spaced apart from each other with the channel region interposed therebetween.

[0105] The active layer 112 a may be formed of a semiconductor material based on any one of amorphous silicon, polysilicon, oxide, and an organic material.

[0106] The gate insulating layer 111a may be formed on the channel region of the active layer 112a. As an example, the gate insulating layer 111a may be formed in an island shape only on the channel region of the active layer 112a, or may be formed on the entire front surface of the first substrate 110 or the buffer layer BL including the active layer 112a.

[0107] The gate electrode 112 b may be formed on the gate insulating layer 111 a to overlap the channel region of the active layer 112 a .

[0108] The interlayer insulating layer 111b may be formed on the gate electrode 112b and the drain and source regions of the active layer 112a. The interlayer insulating layer 111b may be formed in the circuit region and the entire light emitting region where light is emitted to the pixel P. For example, the interlayer insulating layer 111b may be made of an inorganic material, but is not necessarily limited thereto.

[0109] The source electrode 112c can be electrically connected to the source region of the active layer 112a via a source contact hole provided in the interlayer insulating layer 111b that overlaps with the source region of the active layer 112a. Alternatively, the source electrode 112c can be connected to a wiring LS electrically connected to the pixel power supply line EVDD via a contact hole provided in the interlayer insulating layer 111b and the buffer layer BL that do not overlap with the source region of the active layer 112a. The source electrode 112c can be connected to the anode electrode 114 via a connection electrode CE that penetrates the first passivation layer 111c.

[0110] The drain electrode 112 d may be electrically connected to the drain region of the active layer 112 a through a drain contact hole provided in the interlayer insulating layer 111 b overlapping the drain region of the active layer 112 a .

[0111] The drain electrode 112d and the source electrode 112c may be made of the same metal material. For example, each of the drain electrode 112d and the source electrode 112c may be made of a single metal layer, a single alloy layer, or a multilayer of two or more layers, which may be the same as or different from the material of the gate electrode.

[0112] In addition, the circuit region may further include a first switching thin film transistor and a second switching thin film transistor, and a capacitor, provided together with the thin film transistor 112. Since each of the first switching thin film transistor and the second switching thin film transistor is provided on the circuit region of the pixel P to have the same structure as the thin film transistor 112, a description thereof will be omitted. The capacitor may be provided in an overlapping region between the gate electrode 112b and the source electrode 112c of the thin film transistor 112, where the gate electrode 112b and the source electrode 112c overlap with each other with the interlayer insulating layer 111b interposed therebetween.

[0113] In addition, to prevent or reduce the threshold voltage of the thin film transistors disposed in the pixel area from shifting due to light, the display panel or first substrate 110 may further include a light shielding layer (not shown) disposed below the active layer 112a of at least one of the thin film transistor 112, the first switching thin film transistor, or the second switching thin film transistor. The light shielding layer may be disposed between the first substrate 110 and the active layer 112a to block light incident on the active layer 112a from passing through the first substrate 110, thereby minimizing or reducing changes in the threshold voltage of the transistors due to external light. For example, if the wiring LS connected to the pixel power line is an opaque wiring, the wiring LS may also function as a light shielding layer.

[0114] The first passivation layer 111c may be disposed between the first substrate 110 and the planarization layer 113. According to one example, the first passivation layer 111c covers the drain electrode 112d and the source electrode 112c of the thin film transistor 112 and the interlayer insulating layer 111b. The first passivation layer 111c may be formed throughout the circuit region and the light emitting region.

[0115] The second passivation layer 111d may be provided on the first substrate 110 to cover the pixel (or the emission area EA). For example, the second passivation layer 111d may be provided to cover the connection electrode CE between the first passivation layer 111c and the planarization layer 113. The first passivation layer 111c may be formed throughout the circuit region and the emission area.

[0116] The planarization layer 113 may be provided on the first substrate 110 to cover the second passivation layer 111d. When the second passivation layer 111d is omitted, the planarization layer 113 may be provided on the first substrate 110 to cover the circuit area. The planarization layer 113 may be formed over the entire circuit area and the light-emitting area. In addition, the planarization layer 113 may be formed over the entire display area DA and the non-display area NDA (excluding the pad area PA). For example, the planarization layer 113 may include an extension (or multiple extensions) extending from the display area DA toward the remaining portion of the non-display area NDA excluding the pad area PA. Therefore, the planarization layer 113 may have a relatively larger size than the display area DA.

[0117] The planarization layer 113 according to an example may be formed relatively thick, thereby providing a flat surface on the display area DA and the non-display area NDA. For example, the planarization layer 113 may be made of an organic material such as photosensitive acrylic, benzocyclobutene, polyimide, and fluororesin.

[0118] The anode electrode 114 of the subpixel SP may be formed on the planarization layer 113. The anode electrode 114 is connected to the source electrode or drain electrode of the thin film transistor 112 by being connected to the connection electrode CE through a contact hole through the planarization layer 113 and the second passivation layer 111d.

[0119] The anode electrode 114 may be made of at least one of a transparent metal material, a semi-transmissive metal material, or a metal material having high reflectivity.

[0120] When the transparent display device 100 is set to the top emission mode, the anode electrode 114 can be formed of a metal material with high reflectivity or a stacked structure of a metal material with high reflectivity and a transparent metal material. For example, the anode electrode 114 can be formed of the following metal materials with high reflectivity: a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, a stacked structure of an Ag alloy and ITO (ITO / Ag alloy / ITO). The Ag alloy can be an alloy such as silver (Ag), palladium (Pd), and copper (Cu).

[0121] When the transparent display device 100 is set to the bottom emission mode, the anode electrode 114 can be formed of a light-transmitting transparent conductive material (TCO) such as ITO and IZO, or a semi-transmitting conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag).

[0122] In addition, the material constituting the anode electrode 114 may include MoTi. The anode electrode 114 may be a first electrode or a pixel electrode.

[0123] The bank 115 is a non-emission region that does not emit light and may be disposed to surround each of the emission regions of the plurality of sub-pixels SP. For example, the bank 115 may divide (or define) the corresponding emission region EA.

[0124] The bank 115 may be formed on the planarization layer 113 to cover the edge of the anode electrode 114 , thereby dividing (or defining) the emission areas EA (or emission portions) of the plurality of sub-pixels SP.

[0125] The bank 115 may be formed to cover the edge of each anode electrode 114 included in each sub-pixel SP and expose a portion of each anode electrode 114. Thus, the bank 115 may cover the end of each anode electrode 114, thereby preventing or reducing a short circuit between the anode electrode 114 and the cathode electrode 117. The exposed portion of the anode electrode 114 not covered by the bank 115 may be the emission area EA (or emission portion).

[0126] The bank 115 may be formed of an organic layer such as acrylic resin, epoxy resin, phenol resin, polyamide resin, and polyimide resin, but is not limited thereto.

[0127] The organic light emitting layer 116 is formed on the anode electrode 114 and the bank 115 , and when voltage is applied to the anode electrode 114 and the cathode electrode 117 , holes and electrons respectively migrate to the organic light emitting layer 116 and recombine with each other in the organic light emitting layer 116 to emit light.

[0128] The organic light-emitting layer 116 may be formed of a plurality of sub-pixels SP and a common layer disposed on the bank 115. In this case, the organic light-emitting layer 116 may be provided in a series structure in which a plurality of light-emitting layers (e.g., a yellow-green light-emitting layer and a blue light-emitting layer) are stacked, and when an electric field is formed between the anode electrode 114 and the cathode electrode 117, the organic light-emitting layer 116 may emit white light.

[0129] Color filters 210 adapted to the colors of the corresponding sub-pixels SP may be formed on the second substrate 200. For example, a red color filter 211 may be provided in the red sub-pixel SP1, a green color filter may be provided in the green sub-pixel SP3, and a blue color filter 210 may be provided in the blue sub-pixel SP4. Because the organic light emitting layer 116 emits white light, the white sub-pixel SP2 may not include a color filter.

[0130] The cathode electrode 117 is formed on the organic light emitting layer 116. The cathode electrode 117 may be a common layer commonly formed in the sub-pixels SP. The cathode electrode 117 may be made of a transparent metal material, a semi-transparent metal material, or a metal material having high reflectivity.

[0131] When the transparent display device 100 is set to the top emission mode, the cathode electrode 117 can be formed of a light-transmitting transparent conductive material (TCO) such as ITO and IZO, or a semi-transmitting conductive material such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag).

[0132] When the transparent display device 100 is set to the bottom emission mode, the cathode electrode 117 can be formed of the following metal materials with high reflectivity: such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, and a stacked structure of an Ag alloy and ITO (ITO / Ag alloy / ITO). The Ag alloy can be an alloy such as silver (Ag), palladium (Pd), and copper (Cu). The cathode electrode 117 can be a second electrode or a counter electrode.

[0133] The encapsulation layer 118 is formed on the cathode electrode 117. The encapsulation layer 118 serves to prevent or reduce the penetration of oxygen or water into the organic light emitting layer 116 and the cathode electrode 117. To this end, the encapsulation layer 118 may include at least one organic layer and at least one inorganic layer.

[0134] In the transparent display device 100 according to an exemplary embodiment of the present disclosure, the encapsulation layer 118 may be provided in the non-display area NDA as well as the display area DA. According to one example, the encapsulation layer 118 may be provided between the cathode electrode 117 (and / or the buffer layer BL) and the second substrate 200 .

[0135] Since the encapsulation layer 118 is provided in the display area DA and extends into the non-display area NDA, the encapsulation layer 118 can contact the dam area 120 in (or on the periphery of) the non-display area NDA of the display panel. In addition, since the transparent display device 100 according to an example embodiment of the present disclosure includes the dam area 120 provided in the display area DA and extending to a portion of the display area DA, the encapsulation layer 118 can contact the dam area 120 (or the first dam 121 and the second dam 122) even in the display area DA.

[0136] Therefore, the transparent display apparatus 100 according to the exemplary embodiment of the present disclosure may prevent or reduce moisture penetration toward the display area DA, and may effectively prevent or reduce moisture penetration toward the display area DA even if divided into a plurality of pieces by the space CP.

[0137] Refer again Figure 3 , color filters (e.g., red color filter 211 and blue color filter 210) and black matrix 220 may be disposed between encapsulation layer 118 and second substrate 200. In one example, a color filter may be disposed corresponding to each of a plurality of sub-pixels SP (or a plurality of emission areas EA) on second substrate 200 (or an opposing substrate).

[0138] As described above, since the organic light-emitting layer 116 emits white light, a white sub-pixel (e.g., the second sub-pixel SP2) may not be provided with a color filter. On the other hand, in the first sub-pixel SP1, which is a red sub-pixel, a red color filter 211 may be provided between the encapsulation layer 118 and the second substrate 200. Furthermore, in the fourth sub-pixel SP4, which is a blue sub-pixel, a blue color filter 210 may be provided between the encapsulation layer 118 and the second substrate 200.

[0139] like Figure 3 As shown, the black matrix 220 can be disposed at the edges of the color filters 210 and 211. Thus, the black matrix 220 can prevent or reduce color mixing between the sub-pixels SP. The black matrix 220 may include a black base material and may be disposed in the non-emission area NEA. In one example, the black matrix 220 may be formed on the second substrate 200, at least partially overlapping the bank 115, thereby reducing the cell gap between the organic light-emitting layer 116 and the second substrate 200, thereby preventing or reducing mixing between the sub-pixels.

[0140] On the other hand, the transparent display device 100 according to the exemplary embodiment of the present disclosure may further include a plurality of upper organic layers 230 covering the color filter of at least one sub-pixel SP among the plurality of sub-pixels. Figure 3 As shown, each of the plurality of upper organic layers 230 may be configured to cover the blue color filter 210 and the red color filter 211. Additionally, each of the plurality of upper organic layers 230 may be configured to cover the black matrix 220 disposed between the color filters. Figure 3 , it is shown that one upper organic layer 230 covers two color filters 210 and 211 , but it is not necessarily limited thereto, and one upper organic layer 230 may be configured to cover one color filter disposed on one sub-pixel SP.

[0141] In one example, the plurality of upper organic layers 230 may be spaced apart from each other with the transmissive portion TA (or a portion of the transmissive portion (TA)) interposed therebetween. Since the upper organic layer 230 is an organic layer, it may be a moisture permeable path from the outside to the display area DA. However, in the transparent display device 100 according to an exemplary embodiment of the present disclosure, the plurality of upper organic layers 230 may be spaced apart from each other, thereby blocking the moisture permeation path to the display area DA.

[0142] In addition, the transparent display device 100 according to the example embodiment of the present disclosure is configured such that the plurality of upper organic layers 230 are not disposed on part or all of the transmission portion TA, so transmittance may be improved compared to a case where an organic layer is disposed in the transmission portion TA.

[0143] In addition, the plurality of upper organic layers 230 are spaced apart from each other and the transmissive portion TA (or a portion of the transmissive portion TA) is interposed therebetween, so the dam region 120 (or the first sub-dam 1211 and the second sub-dam 1212) may be disposed between the plurality of upper organic layers 230. For example, the dam region 120 may be partially disposed between the plurality of upper organic layers 230. According to an example, the dam region 120 may be completely disposed between the plurality of upper organic layers 230, as shown in FIG. Figure 3 However, this is not limited thereto, and the dam region 120 may be disposed only partially between the plurality of upper organic layers 230. This describes the arrangement structure of the dam region 120, and in the display area DA where the dam region 120 is not disposed, the filling member RF may be disposed between the plurality of upper organic layers 230.

[0144] In the transparent display device 100 according to an exemplary embodiment of the present disclosure, a plurality of dam regions 120 may be provided on the first substrate 110 in first to Nth (N is a natural number greater than 1) numbers. Figure 1 As shown, the transparent display device 100 according to an exemplary embodiment of the present disclosure may include a first dam 121 and a second dam 122. Figure 1 As shown, the first dam 121 and the second dam 122 may be configured in a closed loop shape (or closed form) that respectively surround portions of the display area DA having the same area. However, this is not limited thereto, and the first dam 121 and the second dam 122 may be configured in a closed loop shape (or closed form) that respectively surround portions of the display area DA having different areas.

[0145] The first dam 121 may include a portion extending from the non-display area NDA to the display area DA and surrounding the display area DA (eg, between the non-display area NDA and the display area DA). Figure 1 The first sub-dam 1211 of the first display area DA1 on the left side of the display, and the second sub-dam 1212 is provided in the area surrounded by the first sub-dam 1211 and is spaced apart from one side of the first sub-dam 1211. Figure 1 As shown, since the first sub-dam 1211 and the second sub-dam 1212 may be connected to each other, the buffer portion BP (or the first buffer portion BP1) may be provided between the first sub-dam 1211 and the second sub-dam 1212. Figure 1 As shown, the second sub-dam 1212 is disposed inside the area surrounded by the first sub-dam 1211, so the first sub-dam 1211 can be disposed closer to the space CP than the second sub-dam 1212 (eg, Figure 1 The first sub-dam 1211 may include a first side 1211a, a second side 1211b, a third side 1211c, and a fourth side 1211d.

[0146] The second dam 122 may include a portion (eg, a portion extending from the non-display area NDA to the display area DA) and surrounding the display area DA. Figure 1 The first sub-dam 1221 of the second display area DA2 on the right side of the display, and the second sub-dam 1222 provided inside the area surrounded by the first sub-dam 1221 and spaced apart from one side of the first sub-dam 1221. Figure 1 As shown, since the first sub-dam 1221 and the second sub-dam 1222 may be connected to each other, the buffer portion BP (or the first buffer portion BP1) may be provided between the first sub-dam 1221 and the second sub-dam 1222. Figure 1 As shown, the second sub-dam 1222 of the second dam 122 is disposed within the area surrounded by the first sub-dam 1221, so the first sub-dam 1221 can be disposed closer to the space CP than the second sub-dam 1222. The first sub-dam 1221 can include a first side 1221a, a second side 1221b, a third side 1221c, and a fourth side 1221d.

[0147] The first side 1211a of the first sub-dam 1211 included in the first dam 121 and the first side 1221a of the first sub-dam 1221 included in the second dam 122 can be arranged adjacent to each other with a space CP interposed therebetween. The first side 1221a, second side 1221b, third side 1221c, and fourth side 1221d of the second dam 122 can have a structure that is reversed in the left-right direction (e.g., the second direction (X-axis direction)), and thus can have the same arrangement structure as the first side 1211a, second side 1211b, third side 1211c, and fourth side 1211d of the first dam 121. Therefore, the description of the first side 1221a, second side 1221b, third side 1221c, and fourth side 1221d of the second dam 122 is replaced by the description of the first side 1211a, second side 1211b, third side 1211c, and fourth side 1211d of the first dam 121.

[0148] Refer again Figure 1, one side of the first sub-dam 1211 included in the first dam 121 can be the first side 1211a of the first sub-dam 1211. The second side 1211b is the first side 1211a and is an edge of the first side 1211a. For example, it can be connected to the upper edge of the first side 1211a. The third side 1211c is the other edge of the first side 1211a. For example, it can be connected to the lower edge of the first side 1211a. The third side 1211c can be spaced apart from the second side 1211b. In one example, the third side 1211c can be arranged parallel to the second side 1211b in the second direction (X-axis direction). The fourth side 1211d can be arranged parallel to the first side 1211a and can be connected to each of the second side 1211b and the third side 1211c. Therefore, the first sub-dam 1211 can be configured as a closed loop.

[0149] In addition, the second sub-dam 1212 of the first dam 121 may be spaced apart from the first side 1211a of the first sub-dam 1211 and may be connected to each of the second side 1211b and the third side 1211c. Figure 1 As shown, the first side 1211 a , a portion of the second side 1211 b , a portion of the third side 1211 c of the first sub-dam 1211 , and the second sub-dam 1212 may be configured as a closed loop.

[0150] like Figure 1 As shown, the first side 1211a of the first sub-dam 1211 and the second sub-dam 1212 may be arranged across the display area DA in the first direction (Y-axis direction). Therefore, the transparent display device 100 according to the exemplary embodiment of the present disclosure may have a structural feature in which the dam area 120 (or the first dam 121) overlaps with the pixel P (or sub-pixel SP) arranged in the display area DA in the third direction (Z-axis direction).

[0151] Reference Figure 1 and Figure 2 , the transparent display device 100 according to the exemplary embodiment of the present disclosure may further include a space CP provided between the first dam area to the Nth dam area 120 (or the first dam 121 and the second dam 122). The space CP according to one example may be a portion cut by a cutting device (such as a laser or a grinding wheel). Therefore, when the cutting device cuts the space CP, the transparent display device 100 according to the exemplary embodiment of the present disclosure may be divided into the first transparent display device 101 and the second transparent display device 102. Figure 1 , it is shown that the transparent display device 100 according to an example embodiment of the present disclosure is configured to be divided into two transparent display devices having the same area (or size), but it is not limited thereto and can be configured to be divided into two transparent display devices having different areas (or sizes).

[0152] Reference Figure 1 As an example, the transparent display device 100 according to an exemplary embodiment of the present disclosure may be configured to be divided into a first transparent display device 101 having a first area and a second transparent display device 102 having a second area equal to the first area via a space CP. Between the first transparent display device 101 and the second transparent display device 102, for example, in an area where the space CP is provided (or a cutting margin acquisition area CMA), the filling member RF and the dam area 120 may not be provided. Therefore, since the filling member RF and the dam area 120 are not formed between the first transparent display device 101 and the second transparent display device 102, the transparent display device 100 according to an exemplary embodiment of the present disclosure may have reduced manufacturing costs, and since cutting is performed in an area where the filling member RF and the dam area 120 are not provided, the cutting process may be easily performed, and thus may have a reduced defect rate.

[0153] In addition, the transparent display device 100 according to the exemplary embodiment of the present disclosure may be provided with a plurality of dam areas 120 corresponding to the number of the plurality of gate drivers GD. Therefore, the transparent display device 100 according to the exemplary embodiment of the present disclosure may be provided to be divided into a plurality of transparent display devices as many as the number of the plurality of gate drivers GD (or the number of the plurality of dam areas 120). For example, the first transparent display device 101 may be provided by including Figure 1 The first gate driver GD1 on the left side of the second transparent display device 102 can be driven by Figure 1 It is driven by the second gate driver GD2 on the right side.

[0154] Refer again Figure 1 , in the transparent display device 100 according to the exemplary embodiment of the present disclosure, each of the plurality of gate drivers GD may be arranged longer along the first direction (Y-axis direction) in the non-display area NDA. Here, the space CP may be arranged in parallel with the gate driver GD. Because when the space CP is arranged in a direction intersecting the gate driver GD, the gate driver GD is damaged by the cutting device and may not be able to operate as a transparent display device. Therefore, in the transparent display device 100 according to the exemplary embodiment of the present disclosure, the space CP may be arranged in parallel with the gate driver GD. For example, as Figure 1As shown, the space CP can be set long along the first direction (Y-axis direction) between the two gate drivers (the first gate driver GD1 and the second gate driver GD2). Therefore, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be cut in the first direction (Y-axis direction) by the cutting device, and can be configured to be divided into the first transparent display device 101 and the second transparent display device 102 having different areas (or sizes).

[0155] like Figure 1 As shown, the space CP is arranged in a vertical direction and thus can be represented by a vertical cutting line. Alternatively, since the transparent display device 100 is cut in one direction, the space CP can be represented by a unidirectional cutting line.

[0156] Refer again Figure 1 In the transparent display device 100 according to the exemplary embodiment of the present disclosure, the circuit board 150 may include a first circuit board 151, a second circuit board 152, a third circuit board 153, and a fourth circuit board 154. For example, the first circuit board 151 and the second circuit board 152 may be connected to the first transparent display device 101. The first circuit board 151 and the second circuit board 152 may be connected to the timing controller via a cable. The third circuit board 153 and the fourth circuit board 154 may be connected to the second transparent display device 102. The third circuit board 153 and the fourth circuit board 154 may be connected to the timing controller via a cable. Therefore, when the transparent display device 100 according to the exemplary embodiment of the present disclosure is separated (or divided) by a cutting device, the first transparent display device 101 and the second transparent display device 102 may be used as corresponding transparent display devices having the same or different areas (or sizes).

[0157] The transparent display device 100 according to an example embodiment of the present disclosure may include a planarization layer 113 disposed on a first substrate 110, and a plurality of inorganic layers 111 disposed between the first substrate 110 and the planarization layer 113. For example, the plurality of inorganic layers 111 may be a gate insulating layer 111a, an interlayer insulating layer 111b, a first passivation layer 111c, and a second passivation layer 111d disposed on an upper surface of the buffer layer BL.

[0158] The transparent display apparatus 100 according to an example embodiment of the present disclosure may include an undercut portion UC from which the planarization layer 113 and the plurality of inorganic layers 111 have been partially removed.

[0159] According to one example, the undercut portion UC may be formed by partially removing each of the interlayer insulating layer 111b, the first passivation layer 111c, and the second passivation layer 111d. Figure 3As shown, the undercut portion UC may be formed in the transmissive portion TA. For example, the transmissive portion TA may include the undercut portion UC.

[0160] The undercut portion UC serves to disconnect the organic light-emitting layer 116 disposed in the transmissive portion TA. In the transparent display device 100 according to the exemplary embodiment of the present disclosure, the organic light-emitting layer 116, the cathode electrode 117, and the encapsulation layer 118 are formed after the undercut portion UC is formed. Therefore, the organic light-emitting layer 116 can be disconnected by the undercut portion UC. Therefore, the transparent display device 100 according to the exemplary embodiment of the present disclosure can prevent or reduce moisture from penetrating through the organic light-emitting layer 116.

[0161] According to an example, the undercut portion UC can be arranged in the transmissive portion TA as a first undercut portion UC to an M-th undercut portion UC (M is a natural number greater than zero). Since the undercut portion UC is a discontinuous area of the organic light-emitting layer 116, even if the undercut portion UC is cut by a cutting device, moisture penetration into the display area DA can be prevented or reduced. Therefore, in the transparent display device 100 according to an example embodiment of the present disclosure, the space CP can be any one of the first undercut portion UC to the M-th undercut portion UC. For example, as Figure 4 As shown, undercut portions UC may be formed on both sides of the planarization layer 113' provided on the transmissive portion TA. The planarization layer 113' provided in the transmissive area TA is provided in the shape of an island spaced apart from the planarization layer 113 provided in the emission area EA, and thus may be represented by an island OC or a first planarization layer. In contrast, the planarization layer 113 provided to overlap the emission area EA (and / or the non-emission area NEA) is provided to cover the thin film transistor 112, and thus may be represented by a cover layer OC or a second planarization layer.

[0162] For example, Figure 2 As shown, the two planarization layers 113' (or the first planarization layer 113') disposed on the transmission area TA may be parallel to the first direction (Y-axis direction) on the transmission area TA. In this case, one transmission area TA may have four undercut portions UC disposed therein, as shown in FIG. Figure 4as shown. Any one of the four undercut portions UC may be a space CP. However, this is not necessarily limited to this, and the space CP may be formed in the light-emitting area EA or the transmission area TA instead of the undercut portion UC. In addition, the space CP may be provided in an area that is not the dam area 120. However, the space CP may not be provided in an area where the filling member RF is provided. This is because, if the space CP is provided in an area where the filling member RF is provided, moisture penetration through an organic layer such as an organic light-emitting layer may occur when cut by a cutting device. Therefore, in the transparent display device 100 according to an example embodiment of the present disclosure, the space CP may be provided in at least one of the undercut portion UC in an area where the filling member RF is not provided, the light-emitting area in an area where the filling member RF is not provided, and the transmission area TA in an area where the filling member RF is not provided. Hereinafter, one of the multiple undercuts UC is described as a space CP.

[0163] When any one of the first to M-th undercut portions UC is cut by a cutting device, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be implemented as a plurality of transparent display devices having different areas or the same area. Since the organic light-emitting layer 116 is discontinuous in the undercut portion UC, moisture penetration through the organic light-emitting layer 116 can be prevented or reduced even when cut by the cutting device. In addition, since the space CP is provided between the plurality of dam regions 120 (or between the first dam 121 and the second dam 122), even if the space CP is cut by the cutting device, the edge of each transparent display device (e.g., the first transparent display device 101 and the second transparent display device 102) can be provided with a structure in which the dam region 120 surrounds the display area DA. In addition, in each transparent display device (e.g., the first transparent display device 101 and the second transparent display device 102), the getter included in the dam region 120 provided at the edge can be capable of absorbing moisture and oxygen, thereby further maximizing, enhancing, or increasing the prevention of moisture penetration into the display area DA.

[0164] Reference Figure 3 In the transparent display device 100 according to the exemplary embodiment of the present disclosure, the organic light emitting layer 116 may be discontinuous at the undercut portion UC. In addition, each of the cathode electrode 117 and the encapsulation layer 118 may also be discontinuous at the undercut portion UC. Figure 3As shown, the first planarization layer 113', the organic light-emitting layer 116 disposed on the first planarization layer 113', the cathode electrode 117, and the encapsulation layer 118 can be arranged in an island shape. Therefore, undercuts UC can be formed on either side of the first planarization layer 113', and the dam region 120 can be provided up to the undercuts UC disposed on either side of the first planarization layer 113'. Because the dam region 120 including the getter is provided up to the undercut portion UC, the transparent display device 100 according to the exemplary embodiment of the present disclosure can further prevent or reduce moisture penetration. However, this is not necessarily limited to this, and the dam region 120 can be formed only partially on one side of the first planarization layer 113'.

[0165] On the other hand, the transparent display device 100 according to the example embodiment of the present disclosure can form a space so that various types (or various sizes) of transparent display devices can be manufactured without an additional mask process by forming a process of disconnecting the bottom cut portion UC of the organic light-emitting layer 116, thereby reducing production energy compared to the case where various types (or various sizes) of transparent display devices are manufactured through various processes.

[0166] In the transparent display device 100 according to an exemplary embodiment of the present disclosure, the buffer portion BP may be disposed to overlap with the light emitting area EA. Figure 3 As shown, the buffer portion BP may be disposed to overlap the emission area EA of the first sub-pixel SP1 and the emission area EA of the fourth sub-pixel SP4. Therefore, the buffer portion BP stores the light from one side of the fourth sub-pixel SP4 (eg, Figure 3 The outgassing emitted in the first emission direction D1 by the second sub-dam 1212 on the left side of the fourth sub-pixel SP4 in FIG4 and the outgassing emitted from the side of the first sub-pixel SP1 (eg, Figure 3 The exhaust gas is emitted from the first sub-dam 1211 (or the first side 1211a) on the right side of the first sub-pixel SP1 in the CMOS process along the second emission direction D2.

[0167] On the other hand, Figure 3 In the embodiment of the transparent display device 100 according to the present disclosure, the buffer portion BP is described as being arranged to overlap with two emission areas EA, but is not limited thereto, and the buffer portion BP may be arranged to overlap with one emission area EA. Alternatively, if moisture penetration can be prevented or reduced, the buffer portion BP may be arranged to overlap with three or more emission areas EA. Therefore, in the transparent display device 100 according to the embodiment of the present disclosure, the buffer portion BP may be arranged to overlap with one or more emission areas EA.

[0168] According to an example, the buffer portion BP may overlap the non-emission region NEA adjacent to the emission region EA, the transmission portion TA adjacent to the non-emission region NEA, and a portion of the emission region EA, depending on the formation position of the dam region 120. Figure 3 shown.

[0169] like Figure 3 As shown, the dam area 120 (or the first sub-dam 1211 and the second sub-dam 1212) can be blocked from flowing by at least one undercut portion UC among the plurality of undercut portions UC. Therefore, the transparent display device 100 according to an exemplary embodiment of the present disclosure may include a structural feature in which the buffer portion BP is provided along the undercut portion UC.

[0170] Figure 5 yes Figure 2 An enlarged plan view of portion B is shown, and Figure 6 yes Figure 5 Schematic cross-sectional view along line III-III' is shown.

[0171] Reference Figure 5 and Figure 6 In the transparent display device 100 according to the exemplary embodiment of the present disclosure, the undercut portion UC may include a blocking portion BKP partially overlapping the planarization layer 113 ′ (or the first planarization layer 113 ′) between the first passivation layer 111 c and the second passivation layer 111 d. For example, the blocking portion BKP may be formed at the intersection of the first planarization layer 113 ′ and the second line SL2 (or the gate line GL), as shown in FIG. Figure 5 shown.

[0172] The blocking portion BKP serves to prevent or reduce all inorganic layers disposed on the upper portion of the wiring (eg, the second line SL2 (or the gate line GL)) from being etched by the etchant used when forming the undercut portion UC. Figure 6 As shown, the blocking portion BKP is disposed on the inorganic layer (or the interlayer insulating layer 111b and the first passivation layer 111c) on the second line SL2 (or the gate line GL), thereby protecting the inorganic layer (or the interlayer insulating layer 111b and the first passivation layer 111c) from the etching solution. Therefore, when the cathode electrode 117 is deposited, contact between the second line SL2 (or the gate line GL) and the cathode electrode 117 can be prevented or reduced. According to one example, the blocking portion BKP may include a metal material having high resistance to etchants. The blocking portion BKP may be formed in the same layer as the connection electrode CE.

[0173] Reference Figure 6The blocking portion BKP can be configured to have a width greater than that of the undercut portion UC in the second direction (X-axis direction). Therefore, the edge of the blocking portion BKP can be covered by the second passivation layer 111d. The organic light-emitting layer 116, cathode electrode 117, and encapsulation layer 118, which are respectively cut off by the undercut portion UC, can contact the upper surface of the blocking portion BKP.

[0174] On the other hand, Figure 6 As shown, the filling member RF for bonding the first substrate 110 and the second substrate 200 may be provided on the upper side of the encapsulation layer 118 and the upper side of the blocking portion BKP. This is because the filling member RF is provided on the display area DA (the first display area DA1 or the second display area DA2) surrounded by the dam area 120 (the first dam 121 or the second dam 122).

[0175] As a result, the transparent display device 100 according to the example embodiment of the present disclosure is configured to include a blocking portion BKP partially overlapping the undercut portion UC, which can protect at least a portion of the inorganic film layer provided on the upper portion of the wiring from the influence of the etchant used when forming the undercut portion UC, thereby preventing or reducing the contact between the second line SL2 (or the gate line GL) and the cathode electrode 117.

[0176] Figure 7 is a schematic plan view of a transparent display device according to another embodiment of the present disclosure, and Figure 8 yes Figure 7 A schematic cross-sectional view along line IV-IV' is shown.

[0177] Reference Figure 7 , except that the arrangement position of the buffer portion BP has been changed, the transparent display device 100 according to another embodiment of the present disclosure is the same as the transparent display device 100 according to the embodiment described above. Figure 1 Therefore, the same reference numerals are assigned to the same configurations, and only different configurations will be described hereinafter.

[0178] Based on the above description Figure 1 In the transparent display device of FIG. 1 , since the buffer portion BP is provided to overlap with the light emitting area EA, the exhaust gas contained in the dam area 120 (or the first sub-dam 1211 or 1221 and the second sub-dam 1212 or 1222) adjacent to the light emitting area EA can be released (or stored) into the buffer portion BP formed on the light emitting area EA (or the buffer portion BP containing the light emitting area EA). Figure 1In the case of a transparent display device, exhaust gas emitted from the dam area 120 (or the first sub-dam 1211 or 1221 and the second sub-dam 1212 or 1222) may not penetrate into the organic light-emitting layer 116, but may be released into the buffer portion BP, thereby preventing or reducing the occurrence of dark spots in the pixel P (or sub-pixel SP) due to the exhaust gas emitted from the dam area 120.

[0179] In contrast, according to Figure 7 In the case of a transparent display device, the buffer portion BP may be arranged to overlap at least a portion of the transmissive portion TA. Figure 8 As shown, the buffer portion BP may be disposed to overlap a portion of the transmission portion TA between the emission area EA (or non-emission area NEA) of the first subpixel SP1 and the emission area EA (or non-emission area NEA) of the fourth subpixel SP4. Figure 8 As shown, the organic layer (eg, the planarization layer and the upper organic layer 230) may be hardly disposed on the transmission portion TA compared to the emission area EA. Figure 7 In the case of a transparent display device, the buffer portion BP can be provided in the transmission portion TA where there is less (minimum) organic film on the first substrate 110 and the second substrate 200 compared to the light-emitting area EA, thereby further preventing or reducing the exhaust gas in the dam area 120 from penetrating through the organic film into the organic light-emitting layer 116.

[0180] In addition, refer to Figure 8 , according to Figure 7 In the transparent display device 100, the transmission portion TA may include a pattern portion PP formed by partially removing the plurality of inorganic film layers 111, the organic light emitting layer 116, the cathode electrode 117, and the encapsulation layer 118. Figure 7 In the case of the transparent display device, the buffer portion BP is arranged to overlap the transmissive portion TA (or a portion of the transmissive portion TA), and thus the buffer portion BP may also include the pattern portion PP. Figure 8 As shown, since the undercut portions UC formed in the transmissive portion TA are disposed on the left and right sides of the transmissive portion TA, the pattern portion PP according to an example may be disposed in an island shape.

[0181] More specifically, since the undercut portion UC is provided on either side of the pattern portion PP, the plurality of inorganic film layers 111 (e.g., the interlayer insulating layer 111b, the first passivation layer 111c, and the second passivation layer 111d) included in the pattern portion PP may be discontinuous with the plurality of inorganic film layers 111 in the emission area EA (or the non-emission area NEA), and the discontinuous plurality of inorganic film layers 111 provided in the transmission area TA may be covered by the organic light-emitting layer 116. In this case, both ends of the organic light-emitting layer 116 may respectively contact the upper surface of the buffer layer BL. The organic light-emitting layer 116 may then be covered by the cathode electrode 117, and the cathode electrode 117 may be covered by the encapsulation layer 118. In this case, each of the ends of the cathode electrode 117 and each of the ends of the encapsulation layer 118 may contact the upper surface of the buffer layer BL. Therefore, the pattern portion PP disposed in the transmissive portion TA includes a plurality of isolated inorganic film layers 111 and isolated organic light-emitting layers 116, isolated cathode electrodes 117, and isolated encapsulation layers 118, and can be arranged in an island shape. The encapsulation layer 118 includes at least one inorganic film, thereby preventing or reducing the infiltration of exhaust gas emitted into the transmissive portion TA into the isolated organic light-emitting layers 116 (or the island-shaped organic light-emitting layers 116). Therefore, even when the buffer portion BP overlaps at least a portion of the transmissive portion TA, the transparent display device 100 according to other embodiments of the present disclosure can prevent or reduce the occurrence of dark spots in the pixels P (or sub-pixels SP) due to exhaust gas in the dam area 120.

[0182] In addition, the transparent display device 100 according to other embodiments of the present disclosure may be configured such that the buffer portion BP as a vacuum overlaps at least a portion of the transmission portion TA, thereby improving transmittance compared to when the buffer portion BP is configured to overlap the emission area EA.

[0183] Figure 9 yes Figure 7 A cross-sectional view taken along line IV-IV' is shown, which illustrates a transparent display device according to another embodiment of the present disclosure.

[0184] Now refer to Figure 9 , except that the structure of the pattern part PP has been changed, the transparent display device 100 according to another embodiment of the present disclosure is the same as the transparent display device 100 according to the above embodiment. Figure 8 Therefore, the same reference numerals are assigned to the same configurations, and only different configurations will be described hereinafter.

[0185] Based on the above description Figure 8In the case of a transparent display device, the buffer portion BP is arranged to overlap at least a portion of the transmissive portion TA, and the pattern portion PP of the buffer portion BP includes a plurality of isolated inorganic film layers 111, isolated organic light emitting layers 116, isolated cathode electrodes 117, and isolated encapsulation layers 118, and may be arranged in an island shape. Figure 8 In the case of a transparent display device, even if the buffer portion BP overlaps with at least a portion of the transmission portion TA, the exhaust gas from the dam area 120 can be emitted or stored only in the buffer portion BP because the exhaust gas released or stored in the buffer portion BP cannot penetrate into the organic light-emitting layer 116 in the transmission portion TA or the organic light-emitting layer 116 in the light-emitting area EA (or the non-light-emitting area NEA), which prevents or reduces the occurrence of dark spots in the pixel P (or sub-pixel SP) due to the exhaust gas emitted from the dam area 120.

[0186] In contrast, according to Figure 9 In the case of a transparent display device, the buffer portion BP may include a pattern portion PP formed by partially removing the organic light emitting layer 116, the cathode electrode 117, and the encapsulation layer 118. In other words, according to Figure 9 The transparent display device may have an omitted Figure 8 The pattern portion PP of the transparent display device includes a structure of multiple inorganic film layers 111 (or isolated inorganic film layers 111). Figure 8 Compared with transparent display devices, Figure 9 The transparent display device 100 may be formed with the pattern portion PP having a thinner thickness.

[0187] In addition, according to Figure 9 In the case of the transparent display device 100, according to Figure 8 The buffer layer BL under the pattern portion PP of the transparent display device can also be patterned and removed. Therefore, the transparent display device 100 according to another embodiment of the present disclosure has the following structure: the thickness of the pattern portion PP in the transmissive portion TA provided with the buffer portion BP is thicker than that of the pattern portion PP according to the embodiment of the present disclosure. Figure 8 The thickness of the pattern part PP in the transparent display device is thin, and the buffer layer BL under the pattern part PP is also removed, so that the space of the buffer part BP can be smaller than that according to Figure 8 The space of the buffer portion BP in the transparent display device of the present disclosure is wider. Therefore, the transparent display device 100 according to another embodiment of the present disclosure can allow the buffer portion BP to accommodate (or store) more exhaust gas emitted from the dam area 120. In addition, the transparent display device 100 according to another embodiment of the present disclosure has a structure in which the pattern portion PP does not include the plurality of inorganic film layers 111, and the buffer layer BL under the pattern portion PP is also omitted (or deleted), so that ... Figure 8Compared with the transparent display device, the transmittance of the transmission part TA can be further maximized, enhanced or increased.

[0188] On the other hand, when the space CP is cut by the cutting device, the transparent display device 100 according to the exemplary embodiment of the present disclosure can be divided into a first transparent display device 101 and a second transparent display device 102. Then, the first transparent display device 101 may include a substrate 110 having a display area DA and a non-display area NDA (or a frame area), a dam area 120 (or a first dam 121) surrounding the display area DA on the substrate 110, and a buffer portion BP (or a first buffer portion BP1) disposed within the area surrounded by the dam area 120 (or the first dam 121). In the display area DA, a plurality of pixels P each having a plurality of sub-pixels SP and a transmissive portion TA are disposed, and the non-display area NDA (or a frame area) is disposed around the display area DA. In addition, the second transparent display device 102 may include a substrate 110 having a display area DA and a non-display area NDA (or a frame area), a dam area 120 (or a second dam 122) surrounding the display area DA on the substrate 110, and a buffer portion BP (or a second buffer portion BP2) disposed within the area surrounded by the dam area 120 (or the second dam 122). In the display area DA, a plurality of pixels P each having a plurality of sub-pixels SP and a transmissive portion TA are disposed, and the non-display area NDA (or a frame area) is disposed around the display area DA.

[0189] The dam area 120 (or first dam 121) and buffer portion BP (or first buffer portion BP1) included in the first transparent display device 101 and the dam area 120 (or second dam 122) and buffer portion BP (or second buffer portion BP2) included in the second transparent display device 102 are respectively the same as the dam area 120 and buffer portion BP included in the transparent display device 100 described above, and therefore a detailed description thereof will be omitted.

[0190] As a result, the transparent display device 100 having the space CP disposed between the plurality of dam areas 120 according to an example embodiment of the present disclosure may have reduced production energy compared to a transparent display device produced in a plurality of varieties (or different sizes) through a plurality of production processes (or manufacturing processes).

[0191] In addition, although the transparent display device 100 according to the example embodiment of the present disclosure is divided into the first transparent display device 101 and the second transparent display device 102, because the multiple dam areas 120 (or the first dam 121 and the second dam 122) cover the edge of each of the first transparent display device 101 and the second transparent display device 102 in a closed loop structure (or closed structure), moisture penetration can be reduced or prevented.

[0192] In addition, the transparent display device 100 according to the example embodiment of the present disclosure includes a buffer portion BP located between the first sub-dam 1211 (or the first sub-dam 1221) and the second sub-dam 1212 (or the second sub-dam 1222), and the exhaust gas emitted from the first sub-dam 1211 (or the first sub-dam 1221) and / or the second sub-dam 1212 (or the second sub-dam 1222) can be induced and released into the buffer portion BP, so that damage to the organic light-emitting layer can be prevented or reduced and the occurrence of dark spots can be prevented or reduced.

[0193] The embodiments of the present disclosure have been described in more detail with reference to the accompanying drawings, but the present disclosure is not necessarily limited to these embodiments and can be practiced in various variations without departing from the technical ideas of the present disclosure. Therefore, the embodiments disclosed herein are intended to illustrate rather than limit the technical ideas of the present disclosure, and the scope of the technical ideas of the present disclosure is not limited by these embodiments. Therefore, the above-mentioned embodiments are exemplary in all aspects and should be understood as non-restrictive. The scope of protection of this specification should be interpreted by the claims, and all technical ideas within the scope of the claims should be interpreted as included within the scope of the claims.

[0194] The transparent display device of the present disclosure includes a plurality of dam areas (or a first dam area and a second dam area), so that the display panel can be cut into various sizes.

[0195] Furthermore, the transparent display device of the present disclosure can be manufactured in multiple varieties (or different sizes) without an additional mask process, which can reduce production energy compared to producing multiple varieties of transparent display devices through different production processes.

[0196] Furthermore, the transparent display device of the present disclosure is provided in such a manner that a moisture penetration path of the cutout portion is cut off, so that even when products of various varieties (or different sizes) are manufactured, moisture penetration can be reduced or prevented.

[0197] In addition, the transparent display device of the present disclosure provides a buffer portion between the first sub-dam and the second sub-dam adjacent to the cutout portion, so that exhaust gas emitted from the first sub-dam and / or the second sub-dam can be stored in the buffer portion, thereby preventing or reducing the occurrence of dark spots.

[0198] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be apparent to those of ordinary skill in the art from the following description.

[0199] CROSS-REFERENCE TO RELATED APPLICATIONS

[0200] This application claims the benefit of and priority to Korean Patent Application No. 10-2024-0018204 filed in Korea on February 6, 2024, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein.

Claims

1. A transparent display device, comprising: a substrate including a display area provided with a plurality of pixels and a non-display area adjacent to the display area, wherein each of the plurality of pixels has a transmissive portion and a plurality of sub-pixels; as well as a plurality of dam regions, the plurality of dam regions being arranged on the substrate, Wherein, each of the plurality of dam areas comprises: a first sub-dam, the first sub-dam surrounding a portion of the display area; and a second sub-dam, wherein the second sub-dam is disposed on the display area and connected to one side of the first sub-dam.

2. The transparent display device according to claim 1, in, The plurality of dam regions are arranged on the substrate from a first dam region to an Nth dam region, where N is a natural number greater than one, and The transparent display device further includes: The space is provided between the first dam region to the Nth dam region.

3. The transparent display device according to claim 2, wherein: The first sub-dam is disposed closer to the space than the second sub-dam.

4. The transparent display device according to claim 1, in, The one side of the first sub-dam is the first side of the first sub-dam, The first sub-dam includes a second side connected to one edge of the first side, and a third side connected to the other edge of the first side and spaced apart from the second side. The second sub-dam is connected to the second side and the third side respectively.

5. The transparent display device according to claim 4, wherein: The first side of the first sub-dam, a portion of the second side, a portion of the third side, and the second sub-dam form a closed loop.

6. The transparent display device according to claim 1, further comprising: A buffer portion is provided between the first sub-dam and the second sub-dam.

7. The transparent display device according to claim 6, wherein: The buffer portion is vacuum.

8. The transparent display device according to claim 6, in, Each of the plurality of sub-pixels includes a light emitting region disposed adjacent to the transmissive portion, Wherein, the buffer portion is arranged to overlap with the light emitting area.

9. The transparent display device according to claim 6, further comprising: a planarization layer, the planarization layer being disposed on the substrate; as well as a plurality of inorganic film layers, wherein the plurality of inorganic film layers are arranged between the substrate and the planarization layer, wherein the transmission portion includes an undercut portion in which the planarization layer and the plurality of inorganic film layers are partially removed, and Wherein, the buffer portion is arranged along the undercut portion.

10. The transparent display device according to claim 9, wherein: The undercut portions are provided as first to M-th undercut portions in the transmission portion, where M is a natural number greater than zero.

11. The transparent display device according to claim 10, further comprising: The space between the plurality of dam areas is provided, The space is one undercut portion from the first undercut portion to the Mth undercut portion.

12. The transparent display device according to claim 9, in, The plurality of inorganic film layers include: a first passivation layer disposed between the substrate and the planarization layer; and a second passivation layer, the second passivation layer being disposed between the first passivation layer and the planarization layer, and The undercut portion includes a blocking portion partially overlapping the planarization layer between the first passivation layer and the second passivation layer.

13. The transparent display device according to claim 12, in, The substrate further includes a gate line extending in one direction in the display area, and Wherein, the blocking portion is provided on the gate line.

14. The transparent display device according to claim 1, further comprising: an opposing substrate, the opposing substrate being arranged to face the substrate; a color filter disposed on the opposite substrate to correspond to each of the plurality of sub-pixels; as well as a plurality of upper organic layers covering the color filter of at least one sub-pixel among the plurality of sub-pixels, Herein, the plurality of upper organic layers are disposed to be spaced apart from each other, and the transmission portion is interposed between the plurality of upper organic layers. 15 . The transparent display apparatus according to claim 14 , further comprising a filling member adjacent to the dam area and disposed to fill a gap between the substrate and the opposite substrate.

16. The transparent display device according to claim 1, wherein: Each of the first sub-dam and the second sub-dam includes an absorbent material.

17. The transparent display device according to claim 9, in, Each of the plurality of pixels comprises: an anode electrode, the anode electrode being disposed on the planarization layer; an organic light-emitting layer, wherein the organic light-emitting layer is disposed on the anode electrode; a cathode electrode, the cathode electrode being disposed on the organic light-emitting layer; and an encapsulation layer disposed on the cathode electrode, and The organic light emitting layer is discontinuous at the undercut portion.

18. The transparent display device according to claim 6, wherein: The buffer portion is disposed to overlap at least a portion of the transmission portion.

19. The transparent display device according to claim 18, in, Each of the plurality of pixels comprises: a plurality of inorganic film layers, wherein the plurality of inorganic film layers are disposed on the substrate; an organic light-emitting layer, wherein the organic light-emitting layer is disposed on the plurality of inorganic film layers; a cathode electrode, the cathode electrode being disposed on the organic light-emitting layer; and an encapsulation layer disposed on the cathode electrode, and The buffer portion includes a pattern portion in which the plurality of inorganic film layers, the organic light-emitting layer, the cathode electrode, and the encapsulation layer are partially removed.

20. The transparent display device according to claim 18, in, Each of the plurality of pixels comprises: an organic light-emitting layer, wherein the organic light-emitting layer is disposed on the substrate; a cathode electrode, the cathode electrode being disposed on the organic light-emitting layer; and an encapsulation layer disposed on the cathode electrode, and The buffer portion includes a pattern portion in which the organic light emitting layer, the cathode electrode, and the encapsulation layer are partially removed.

21. The transparent display device according to claim 18, in, Each of the plurality of pixels comprises: a buffer layer, the buffer layer being disposed on the substrate; an organic light-emitting layer, wherein the organic light-emitting layer is disposed above the buffer layer; a cathode electrode, the cathode electrode being disposed on the organic light-emitting layer; and an encapsulation layer disposed on the cathode electrode, and The buffer portion includes a pattern portion in which the buffer layer, the organic light emitting layer, the cathode electrode, and the encapsulation layer are partially removed.

22. A transparent display device, comprising: a substrate including a display area provided with a plurality of pixels and a non-display area adjacent to the display area, wherein each of the plurality of pixels has a transmissive portion and a plurality of sub-pixels; a plurality of dam areas surrounding the display area; as well as A buffer portion is provided inside a region surrounded by the dam region.

23. The transparent display device according to claim 22, in, The dam area includes: a first sub-dam, the first sub-dam surrounding the display area; and a second sub-dam, the second sub-dam being arranged to be spaced apart from one side of the first sub-dam within the area surrounded by the first sub-dam, and The buffer portion is provided between the first sub-dam and the second sub-dam.

24. The transparent display device according to claim 22, in, Each of the plurality of sub-pixels includes a light emitting region disposed adjacent to the transmission portion, and Wherein, the buffer portion is arranged to overlap with the light emitting area.

25. The transparent display device according to claim 22, wherein: The buffer portion is disposed to overlap at least a portion of the transmission portion.

26. The transparent display device according to claim 22, further comprising: a planarization layer, the planarization layer being disposed on the substrate; as well as a plurality of inorganic film layers, wherein the plurality of inorganic film layers are arranged between the substrate and the planarization layer, wherein the transmission portion includes an undercut portion in which the planarization layer and the plurality of inorganic film layers are partially removed, and Wherein, the buffer portion is arranged along the undercut portion.

27. A transparent display device, comprising: a substrate including a display area having a plurality of pixels each having a transmissive portion and a non-display area adjacent to the display area; a plurality of dam regions, the plurality of dam regions being disposed on the substrate; as well as A cutting margin region is provided between the plurality of dam regions.

28. The transparent display device according to claim 27, wherein: The cutting margin area is vacuum.

29. A transparent display device, comprising: a substrate including a display area having a plurality of pixels each having a transmissive portion and a non-display area adjacent to the display area; a plurality of dam regions, the plurality of dam regions being disposed on the substrate; a gate line extending in one direction in the display area; an undercut portion provided in the transmissive portion; as well as A blocking portion is formed at an intersection of the undercut portion and the gate line.

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