Transparent display device

Abstract

A transparent display device. The transparent display device includes: a first substrate including a display area and a first border area, a second border area, a third border area, and a fourth border area surrounding the display area, wherein the display area includes a plurality of pixel areas, each comprising a light-emitting portion and a transparent portion; a second substrate facing the first substrate; a transparent dam located between the first substrate and the second substrate and within the first border area, the second border area, the third border area, and the fourth border area; a first pad electrode located on the first substrate and within the first border area; and a first color filter pattern located on the second substrate and within the first border area.

Description

Technical Field

[0001] This disclosure relates to a transparent display device, and more specifically, to a transparent display device capable of minimizing the visibility difference between the display area and the bezel area. Background Technology

[0002] Due to the development of information technology and mobile communication technology, devices capable of displaying visual images have been developed. Examples include flat panel display devices, such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, field emission display (FED) devices, and electroluminescent (EL) display devices.

[0003] Recently, a transparent display device has been developed that can display images without interfering with the view by transmitting light from the front and back.

[0004] For example, in a transparent EL display device, light-emitting diodes are formed in a portion of the display area to serve as light-emitting parts, and light is transmitted in other areas that serve as transparent parts.

[0005] However, in transparent display devices of related technologies, there is a problem of large differences in visibility between the display area and the border area surrounding the display area. Summary of the Invention

[0006] This disclosure relates to a transparent display device that substantially eliminates one or more problems associated with the limitations and drawbacks of related conventional technologies.

[0007] Additional features and advantages of this disclosure are set forth in the following description and will be apparent from the description, or may become apparent by practice of this disclosure. The purposes and other advantages of this disclosure are realized and obtained through the features described herein and in the accompanying drawings.

[0008] To achieve these and other advantages of the embodiments according to this disclosure, as described herein, one aspect of this disclosure is a transparent display device comprising: a first substrate including a display area and a first to fourth border area surrounding the display area, wherein the display area includes a plurality of pixel areas each comprising a light-emitting portion and a transparent portion; a second substrate facing the first substrate; a transparent dam located between the first and second substrates and within the first to fourth border areas; a first pad electrode located on the first substrate and within the first border area; and a first color filter pattern located on the second substrate and within the first border area.

[0009] Another aspect of this disclosure is a transparent display device, comprising: a first transparent display panel and a second transparent display panel arranged along a first direction, and each of the first and second transparent display panels comprising: a first substrate including a first display area and a first to fourth border area surrounding the first display area, wherein the first display area includes a plurality of first pixel areas, each including a first light-emitting portion and a second transparent portion; a second substrate facing the first substrate; a first transparent dam located between the first and second substrates and within the first to fourth border areas; a first pad electrode located on the first substrate and within the first border area; and a first color filter pattern located on the second substrate and within the first border area; and a third and fourth transparent display panels relative to the first and fourth transparent display panels. Two transparent display panels are disposed in a second direction perpendicular to the first direction and arranged along the first direction. Each of the third and fourth transparent display panels includes: a third substrate, which includes a second display area and a fifth to eighth border area surrounding the second display area, wherein the second display area includes a plurality of second pixel areas, each including a second light-emitting portion and a second transparent portion; a fourth substrate facing the third substrate; a second transparent dam located between the third and fourth substrates and in the fifth to eighth border areas; a second pad electrode located on the third substrate and in the fifth border area; and a second color filter pattern located on the fourth substrate and in the fifth border area, wherein the first border areas of the first and second transparent display panels are disposed on the opposite side to the fifth border areas of the third and fourth transparent display panels.

[0010] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to further explain the claimed disclosure. Attached Figure Description

[0011] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and form a part of this specification. The drawings illustrate embodiments of the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0012] Figure 1 This is a schematic diagram illustrating the difference in visibility between the display area and the bezel area in a transparent display device.

[0013] Figure 2 This is a schematic circuit diagram of the transparent display device disclosed herein.

[0014] Figure 3 This is a schematic cross-sectional view of the pixel area of ​​the transparent display device disclosed herein.

[0015] Figure 4This is a schematic cross-sectional view of a transparent display device according to the first embodiment of the present disclosure.

[0016] Figure 5A and Figure 5B It is a graph showing the optical properties of a transparent dam.

[0017] Figure 6 This is a schematic plan view of a transparent display device according to the second embodiment of the present disclosure.

[0018] Figure 7 It is along Figure 6 The cross-sectional view taken from line VII-VII′ in the diagram.

[0019] Figure 8 It is along Figure 6 The cross-sectional view taken from line VIII-VIII′ in the diagram.

[0020] Figure 9 This is a schematic plan view of a transparent display device according to the third embodiment of this disclosure.

[0021] Figure 10 This is a schematic plan view of a transparent display device according to the fourth embodiment of this disclosure.

[0022] Figure 11 This is a schematic plan view of a transparent display device according to the fifth embodiment of this disclosure.

[0023] Figure 12 This is a schematic plan view of a transparent display device according to the sixth embodiment of this disclosure. Detailed Implementation

[0024] As mentioned above, in transparent display devices, there is a problem of visual difference between the display area and the bezel area surrounding the display area. (Refer to...) Figure 1 Explain the problem.

[0025] like Figure 1 As shown, a display area DA and a border area BA surrounding the display area DA are defined in the transparent display device 10, and a light-emitting portion EA and a transparent portion TA are defined in the display area DA. The transparent display device 10 includes a first substrate 20 and a second substrate 30 facing each other, a light-emitting diode D disposed in the light-emitting portion EA and on or above the first substrate 20, a dam 40 disposed in the border area BA and providing an internal space with the first substrate 20 and the second substrate 30, and a filling layer 50 disposed in the internal space provided by the first substrate 20, the second substrate 30 and the dam 40 and attached to the first substrate 20 and the second substrate 30.

[0026] In the transparent display device 10, an image is displayed in the light-emitting portion EA by a light-emitting diode D, and light from the rear side of the first substrate 20 is transmitted through the transparent portion TA.

[0027] Dam 40 is opaque. Dam 40 includes a getter such as CaO, which gives Dam 40 a high haze value under high humidity conditions.

[0028] Therefore, in transparent display devices, there is a problem of visual difference between the display area and the bezel area.

[0029] The following description will now be given in detail with reference to some examples and preferred embodiments shown in the accompanying drawings.

[0030] Figure 2 This is a schematic circuit diagram of the transparent display device disclosed herein.

[0031] like Figure 2 As shown, the transparent display device disclosed herein includes a plurality of pixel regions P, and each pixel region P includes a light-emitting portion EA and a transparent portion TA.

[0032] More specifically, the transparent display device includes a gate line GL and a data line DL that intersect each other to define a first pixel area P1, a second pixel area P2, and a third pixel area P3, and each of the first pixel areas P1 to the third pixel area P3 includes a light-emitting portion EA and a transparent portion TA. The first pixel areas P1 to the third pixel areas P3 constitute a unit pixel, and a unit pixel includes three light-emitting portions EA and three transparent portions TA.

[0033] Alternatively, the transparent portions TA of the first pixel area P1 to the third pixel area P3 can be continuous or connected to each other to form a single unit. That is, a unit pixel can include three emitting portions EA and one transparent portion TA.

[0034] In the light-emitting portion EA of each of the first pixel regions P1 to the third pixel regions P3, a first thin-film transistor (TFT) T1, a second TFT T2, a storage capacitor Cst, and a light-emitting diode D are disposed. That is, the transparent display device of this disclosure can be a transparent EL display device.

[0035] The gate line GL extends in a first direction (e.g., horizontal), and the data line DL extends in a second direction (e.g., vertical). A first pixel region P1, a second pixel region P2, and a third pixel region P3 are arranged sequentially along the first direction. For example, the first pixel region P1 to the third pixel region P3 can be a red pixel region, a green pixel region, and a blue pixel region, respectively.

[0036] In the first TFT T1, the gate is connected to the gate line GL, and the source is connected to the data line DL. In the second TFT T2, the gate is connected to the drain of the first TFT T1, and the source is connected to the high-voltage power supply VDD. The anode of the light-emitting diode D is connected to the drain of the second TFT T2, and the cathode of the light-emitting diode D is connected to the low-voltage power supply VSS. The storage capacitor Cst is connected to the gate and drain of the second TFT T2. That is, the first TFT T1 can be a switching element, while the second TFT T2 can be a driving element.

[0037] In a transparent display device, when the first TFT T1 is turned on by a gating signal applied via the gating line GL, a data signal from the data line DL is applied to the gate of the second TFT T2 and the electrodes of the storage capacitor Cst.

[0038] When the second TFT T2 is turned on by the data signal, current is supplied from the high-voltage power supply VDD to the light-emitting diode D. As a result, the light-emitting diode D emits light.

[0039] When the first TFT T1 is off, the storage capacitor Cst is used to maintain the voltage of the gate of the second TFT T2. Therefore, even when the first TFT T1 is off, the level of the current applied from the high-voltage power supply VDD to the light-emitting diode D is maintained until the next frame.

[0040] As a result, the transparent display device displays the desired image.

[0041] Figure 3 This is a schematic cross-sectional view of the pixel area of ​​the transparent display device disclosed herein.

[0042] like Figure 3 As shown, the transparent display device includes a first substrate 110, a second substrate 120 facing the first substrate 110, a light-emitting diode (LED) D located between the first substrate 110 and the second substrate 120, and a color filter layer 122 corresponding to the LED D and located between the LED D and the second substrate 120. Furthermore, the transparent display device may also include: a filling layer 140 that fills the space between the first substrate 110 and the second substrate 120 and attaches the first substrate 110 and the second substrate 120; and an encapsulation layer 180 that covers or encapsulates the LED D to prevent moisture and / or oxygen from entering the LED D.

[0043] Each of the first substrate 110 and the second substrate 120 may be a glass substrate or a plastic substrate. For example, each of the first substrate 110 and the second substrate 120 may be a transparent polyimide substrate.

[0044] A semiconductor layer 144 is formed on the first substrate 110. The semiconductor layer 144 may include an oxide semiconductor material or polysilicon. Although not shown, a buffer layer comprising an inorganic insulating material, such as silicon oxide or silicon nitride, may be formed between the first substrate 110 and the second TFT T2.

[0045] When the semiconductor layer 144 comprises an oxide semiconductor material, a light-shielding pattern (not shown) may be formed beneath the semiconductor layer 144. The light-shielding pattern can block or obstruct light reaching the semiconductor layer 144, thereby preventing thermal degradation of the semiconductor layer 144. When the semiconductor layer 144 comprises polysilicon, impurities may be doped into both sides of the semiconductor layer 144.

[0046] A gate insulating layer 146 is formed over the entire surface of the substrate 101, which includes the semiconductor layer 144. The gate insulating layer 146 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride.

[0047] A gate 150, made of a conductive material such as a metal, is formed on a gate insulating layer 146 above the center of the semiconductor layer 144. For example, the gate 150 may include copper, aluminum, molybdenum, titanium, and alloys thereof, and may have a single-layer or multi-layer structure.

[0048] exist Figure 3 In this process, a gate insulating layer 146 is formed over the entire surface of the first substrate 110. Alternatively, the gate insulating layer 146 may be patterned to have the same or similar shape as the gate 150.

[0049] An interlayer insulating layer 152 formed of an insulating material is formed on the entire surface of the first substrate 110, including the gate 160. The interlayer insulating layer 152 may be formed of an inorganic insulating material (e.g., silicon oxide or silicon nitride) or an organic insulating material (e.g., benzocyclobutene or photosensitive acrylic).

[0050] The interlayer insulating layer 152 includes a first contact hole 154 and a second contact hole 156 that expose both sides of the semiconductor layer 144. The first contact hole 154 and the second contact hole 156 are located on both sides of the gate 150 and spaced apart from the gate 150.

[0051] exist Figure 3 In this configuration, the first contact hole 154 and the second contact hole 156 extend into the gate insulating layer 146. Alternatively, when the gate insulating layer 146 is patterned to have the same shape as the gate 150, the first contact hole 154 and the second contact hole 156 are formed to extend only through the interlayer insulating layer 152 and not through the gate insulating layer 146.

[0052] A source electrode 160, a drain electrode 162, and an auxiliary electrode 164, formed of a conductive material (e.g., a metal), are formed on the interlayer insulating layer 152. For example, each of the source electrode 160, drain electrode 162, and auxiliary electrode 164 may include copper, aluminum, molybdenum, titanium, and alloys thereof, and may have a single-layer structure or a multi-layer structure.

[0053] The source 160 and drain 162 are spaced apart from each other relative to the gate 150 and contact the two sides of the semiconductor layer 144 through the first contact hole 154 and the second contact hole 156, respectively. The auxiliary electrode 164 is positioned spaced apart from the source 160 and drain 162.

[0054] Semiconductor layer 144, gate 150, source 160, and drain 162 constitute a second TFT T2, which serves as a driving element (driving TFT). The second TFT T2 is located in the light-emitting portion EA of the pixel region P.

[0055] In the second TFT T2, the gate 150, source 160, and drain 162 are positioned above the semiconductor layer 144. That is, the second TFT T2 has a coplanar structure.

[0056] Alternatively, in the second TFT T2, the gate may be located below the semiconductor layer, and the source and drain may be located above the semiconductor layer, such that the second TFT T2 can have an inverted staggered structure. In this case, the semiconductor layer may include amorphous silicon.

[0057] Although not shown, gate lines and data lines are also formed that intersect each other to define the pixel area P and the first TFT T1 as a switching element. The first TFT T1 is connected to the second TFT T2.

[0058] A passivation layer 166 is formed, including a drain contact hole 168 exposing the drain electrode 162 of the second TFT T2 and a first auxiliary contact hole 165 exposing the auxiliary electrode 164, to cover the second TFT T2 and the auxiliary electrode 164.

[0059] In each pixel region P, a first electrode 170 is formed, which is connected to the drain 162 of the second TFT T2 via a drain contact hole 168. The first electrode 170 is located in the light-emitting portion EA of the pixel region P. For example, the first electrode 170 can be an anode and can be formed of a conductive material with a relatively high work function. For example, the first electrode 170 can be formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0060] When the transparent display device of this disclosure operates in a top-emitting mode, a reflective electrode or reflective layer can be formed below the first electrode 170 to improve optical efficiency. The reflective electrode or reflective layer can be formed of an aluminum-palladium-copper (APC) alloy or silver (Ag). For example, the first electrode 170 can have a three-layer structure of ITO / APC / ITO or an ITO / Ag / ITO three-layer structure.

[0061] Additionally, a connection pattern 171 is formed on the passivation layer 166, connecting to the auxiliary electrode 164 through the first auxiliary contact hole 165. The connection pattern 171 can be formed of the same material as the first electrode 170. For example, the connection pattern 171 can have a three-layer structure of ITO / APC / ITO or a three-layer structure of ITO / Ag / ITO.

[0062] A embankment is formed on the passivation layer 166 surrounding the pixel region P. The embankment covers the edge of the first electrode 170. The embankment includes an opening exposing the center of the first electrode 170 and a second auxiliary contact hole 175 exposing the connection pattern 171.

[0063] A light-emitting layer 172 is formed on the first electrode 170. The light-emitting layer 172 may have a monolayer structure comprising a light-emitting material layer (EML) including a light-emitting material. For example, the light-emitting material may include organic light-emitting materials (e.g., phosphorescent compounds, fluorescent compounds, or delayed fluorescence compounds) or inorganic light-emitting materials (e.g., quantum dots).

[0064] The light-emitting layer 172 may have a multilayer structure to improve luminous efficiency. For example, the light-emitting layer 172 may include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0065] For example, the light-emitting layer 172 can be separated in each of the first pixel region P1 to the third pixel region P3 to emit red light, green light, and blue light respectively. Alternatively, the light-emitting layer 172 may include at least two light-emitting portions to emit white light.

[0066] A second electrode 174 is formed on a first substrate 110, including a light-emitting layer 172. The second electrode 174 may cover the entire surface of the display area. The second electrode 174 may be a cathode and may be formed of a conductive material with a relatively low work function. For example, the second electrode 174 may include aluminum (Al), magnesium (Mg), or an Al-Mg alloy (AlMg). In a top-emitting transparent display device, the second electrode 174 may have a relatively small thickness to serve as a transparent electrode (or a semi-transparent electrode).

[0067] The second electrode 174 contacts the connection pattern 171 through the second auxiliary contact hole 175 and is electrically connected to the auxiliary electrode 164 through the connection pattern 171. Therefore, voltage drop problems of the second electrode 174 can be prevented.

[0068] exist Figure 3 In this configuration, the auxiliary electrode 164 is disposed on the same layer as the source electrode 160 and the drain electrode 162. Alternatively, the auxiliary electrode 164 may be disposed on the same layer as the gate electrode 150. Furthermore, an additional insulating layer may be formed between the source electrode 160 and the drain electrode 162 and the passivation layer 166, and the auxiliary electrode 164 may be disposed between the additional insulating layer and the passivation layer 166. The auxiliary electrode 164 and the connection pattern 171 may be omitted.

[0069] The first electrode 170, the light-emitting layer 172, and the second electrode 174 constitute a light-emitting diode D.

[0070] An encapsulation layer 180 is formed on the second electrode 174. The encapsulation layer 180 may have a single-layer structure comprising an inorganic insulating material such as silicon oxide or silicon nitride. Alternatively, the encapsulation layer 180 may have a three-layer structure comprising a first inorganic insulating layer, an organic insulating layer, and a second inorganic insulating layer stacked sequentially. The encapsulation layer 180 may be omitted.

[0071] A color filter layer 122 corresponding to the light-emitting diode D is formed on the second substrate 120. For example, the color filter layer 122 may include a red color filter pattern corresponding to one of the first pixel areas P1 to the third pixel areas P3, a green color filter pattern corresponding to another of the first pixel areas P1 to the third pixel areas P3, and a blue color filter pattern corresponding to yet another of the first pixel areas P1 to the third pixel areas P3.

[0072] A filler layer 140 is formed between the second substrate 120 and the encapsulation layer 180 to attach the first substrate 110 and the second substrate 120. For example, the filler layer 140 may include or be formed of a hygroscopic transparent resin.

[0073] A light-emitting diode (LED) D and a color filter layer 122 are disposed in the light-emitting portion EA of each pixel region P. On the other hand, the LED D and the color filter layer 122 are not present in the transparent portion TA. Therefore, in the light-emitting portion EA, light emitted from the LED D and passing through the color filter layer 122 is displayed, while in the transparent portion TA, light from the rear side of the first substrate 110 is displayed.

[0074] Figure 4 This is a schematic cross-sectional view of a transparent display device according to a first embodiment of the present disclosure.

[0075] like Figure 4As shown, in the transparent display device 100 according to the first embodiment of the present disclosure, a display area DA and a border area BA surrounding the display area DA are defined. A light-emitting portion EA and a transparent portion TA are defined in the display area DA. The transparent display device 100 includes a first substrate 110, a second substrate 120 facing the first substrate 110, a light-emitting diode D corresponding to the light-emitting portion EA and disposed on or above the first substrate 110, a pad electrode 158 corresponding to the border area BA and disposed on the first substrate 110, a transparent dam 130 disposed in the border area BA, a color filter layer 122 corresponding to the light-emitting diode D and disposed on the second substrate 120, and a filler layer 140 disposed in the display area DA and attached to the first substrate 110 and the second substrate 120.

[0076] For reference Figure 3 As described, the light-emitting diode D may include a first electrode 170, a light-emitting layer 172, and a second electrode 174. Additionally, a second TFT T2, connected to the light-emitting diode D and serving as a driving element, may be disposed between the first substrate 110 and the light-emitting diode D.

[0077] Pad electrodes 158 are disposed in the border area BA and between the first substrate 110 and the transparent dam 130. Signals from external electronic components (not shown) are provided to the pixel area P via the pad electrodes 158. Signals for driving the light-emitting diode D are provided via the pad electrodes 158.

[0078] The pad electrode 158 may be disposed on the same layer as the gate 150 or the source 160. The pad electrode 158 may include copper, aluminum, molybdenum, titanium and their alloys, and may have a single-layer structure or a multi-layer structure.

[0079] Additionally, the encapsulation layer 189 covering the light-emitting diode D can extend to cover the pad electrode 158.

[0080] The light-emitting diode D and the color filter layer 122 are disposed in the light-emitting portion EA and are not present in the transparent portion TA.

[0081] A transparent dam 130 in the border area BA is attached to the edge of the first substrate 110 and the second substrate 120, and together with the first substrate 110 and the second substrate 120, provides an internal space. A fill layer 140 fills the internal space in the display area DA provided by the first substrate 110, the second substrate 120 and the transparent dam 130, and is attached to the first substrate 110 and the second substrate 120.

[0082] The transparent dam 130 comprises a polymer resin, a getter (moisture-absorbing material), and spacers, and is translucent. For example, the getter may have a weight percentage of about 1 to 10 for the polymer resin, and the spacers may have a weight percentage of about 0.1 to 5. The weight percentage of the getter may be greater than the weight percentage of the spacers.

[0083] The polymer resin can be a photocurable resin. For example, the polymer resin can be one of an olefin resin, an epoxy resin, a polyurethane resin, or a combination thereof. The getter can be magnesium oxide (MgO) or zirconium oxide (ZrO). Spacers are included to maintain the gap between the first substrate 110 and the second substrate 120. The spacers can be formed of polymethyl methacrylate (PMMA).

[0084] The transparent dam 130 may further include fillers for delaying or preventing the penetration of moisture and / or oxygen, monomers for controlling the viscosity of the composition of the transparent dam 130, photoinitiators (e.g., UV curing agents), and additives (e.g., adhesion promoters or waterproofing agents). Regarding the polymer resin, the fillers and monomers may each have about 5 to 20% by weight, and the photoinitiators and additives may each have about 0.1 to 5% by weight.

[0085] For example, the filler can be nano-silica, and the monomer can be an acrylic monomer. The photoinitiator can be a benzophenone-based compound, and the additive can be one of a fluorinated compound, an alkoxy compound, a silyl compound, and a siloxane compound.

[0086] Refer to the graph illustrating the optical properties of the transparent dam. Figure 5A and Figure 5B The transparent dam 130 exhibits high light transmittance and relatively low haze value under high humidity and high temperature conditions.

[0087] Therefore, the border area BA with the transparent dam 130 has essentially the same performance (or function) as the transparent portion TA in the display area DA, which makes it possible to prevent the difference in visibility between the display area DA and the border area BA caused by the opaque dam.

[0088] However, the pad electrode 158 is formed in a portion of the bezel area BA. Ambient light (or external light) passing through the transparent dam 130 can be reflected by the pad electrode 158, which may degrade the display quality due to the reflection of ambient light.

[0089] For example, pad electrodes 158 are formed in one or two bezel areas on the four sides surrounding the display area DA. Because the pad electrodes 158 are formed of a highly reflective metal, the aforementioned problems caused by ambient light reflection occur.

[0090] Figure 6 This is a schematic plan view of a transparent display device according to the second embodiment of the present disclosure.

[0091] like Figure 6 As shown, the transparent display device 200 according to the second embodiment of the present disclosure includes: a display area DA including a plurality of pixel areas P, a first border area to a fourth border area BA1, BA2, BA3 and BA4 surrounding the display area DA, a pad electrode 158 disposed in the first border area BA1 and electrically connected to a first substrate of the pixel area P, a transparent dam (not shown) located in the first border area BA1 to the fourth border area BA4, and a color filter pattern 124 located in the first border area BA1.

[0092] The pad electrode 158 can be connected to an external drive component (e.g., a data driver IC 192).

[0093] In the transparent display device 200 according to the second embodiment of this disclosure, a transparent dam is provided in all of the first border area BA1 to the fourth border area BA4, while a color filter pattern 124 is provided in the border area where the pad electrode 158 is formed. The color filter pattern 124 corresponds to (or overlaps with) the pad electrode 158. That is, the color filter pattern 124 is provided in the first border area BA1, but not in the second border area BA2 to the fourth border area BA4. In the second border area BA2 to the fourth border area BA4, there is a transparent dam without the color filter pattern 124 and the pad electrode 158.

[0094] Because the transparent dams with high light transmittance are provided in the second frame areas BA2 to the fourth frame areas BA4, the second frame areas BA2 to the fourth frame areas BA4 have similar or substantially the same optical properties as the transparent portion of the display area DA. On the other hand, since the color filter pattern 124 is provided in the first frame area BA1, ambient light reflection caused by the pad electrodes 158 in the first frame area BA1 is reduced. In addition, since light passing through the color filter pattern 124 is displayed in the first frame area BA1, the visibility difference between the display area DA and the frame areas BA is reduced.

[0095] Figure 7 It is along Figure 6 The cross-sectional view taken from line VII-VII′ in the diagram, and Figure 8 It is along Figure 6 The cross-sectional view taken from line VIII-VIII′ in the diagram.

[0096] and Figure 6 Refer to together Figure 7 and Figure 8In the transparent display device 200 according to the second embodiment of this disclosure, a display area DA, a first border area BA1 located on a first side of the display area DA, a second border area BA2 located on a second side of the display area DA opposite to the first side of the display area DA, a third border area BA3 located on a third side of the display area DA, and a fourth border area BA4 located on a fourth side of the display area DA opposite to the third side of the display area DA. Furthermore, a light-emitting portion EA and a transparent portion TA are defined in the display area DA. The transparent display device 100 includes a first substrate 110, a second substrate 120 facing the first substrate 110, a light-emitting diode D corresponding to the light-emitting portion EA and disposed on or above the first substrate 110, a pad electrode 158 corresponding to the first border area BA1 and disposed on the first substrate 110, a transparent dam 130 disposed in the first border area BA1 to the fourth border area BA4, a color filter layer 122 corresponding to the light-emitting diode D and disposed on the second substrate 120, a color filter pattern 124 corresponding to the first border area BA1 and disposed on the second substrate 120, and a filling layer 140 disposed in the display area DA and attached to the first substrate 110 and the second substrate 120.

[0097] For reference Figure 3 As described, the light-emitting diode D may include a first electrode 170, a light-emitting layer 172, and a second electrode 174. Additionally, a second TFT T2, serving as a driving element and connected to the light-emitting diode D, may be disposed between the first substrate 110 and the light-emitting diode D.

[0098] Pad electrodes 158 are disposed in the border area BA and between the first substrate 110 and the transparent dam 130. Signals from external electronic components (not shown) are provided to the pixel area P via the pad electrodes 158. That is, signals for driving the light-emitting diode D are provided via the pad electrodes 158.

[0099] The pad electrode 158 may be disposed on the same layer as the gate 150 or the source 160. The pad electrode 158 may include copper, aluminum, molybdenum, titanium and their alloys, and may have a single-layer structure or a multi-layer structure.

[0100] Additionally, the encapsulation layer 189 covering the light-emitting diode D can extend to cover the pad electrode 158.

[0101] The light-emitting diode D and the color filter layer 122 are disposed in the light-emitting portion EA, but not in the transparent portion TA. For example, the filler layer 140 may have a first thickness in the light-emitting portion EA and a second thickness greater than the first thickness in the transparent portion TA.

[0102] The pad electrode 158 and the color filter pattern 124 are disposed in or present in the first border region BA1, but not in the second border regions BA2 to the fourth border regions BA4. For example, the color filter pattern 124 may be a color filter with the same color as the color filter layer 122 in the pixel region adjacent to the first border region BA1 (i.e., the outermost pixel region on the side of the first border region BA1). In other words, the color filter pattern 124 may be formed of the same material as the color filter layer 122 formed in the outermost pixel region on the side of the first border region BA1.

[0103] As described above, since the transparent dam with high light transmittance is provided in the second frame area BA2 to the fourth frame area BA4, the second frame area BA2 to the fourth frame area BA4 have similar or substantially the same optical properties as the transparent portion of the display area DA. On the other hand, since the color filter pattern 124 is provided in the first frame area BA1, the ambient light reflection caused by the pad electrodes 158 in the first frame area BA1 is reduced. In addition, since light passing through the color filter pattern 124 is displayed in the first frame area BA1, the visibility difference between the display area DA and the frame area BA is reduced. The color filter pattern 124 can have a single-layer structure, so that ambient light reflected by the pad electrodes 158 or light from the rear side of the first substrate 110 can pass through the color filter pattern 124.

[0104] Therefore, the display quality of the transparent display device 200 according to the second embodiment of this disclosure is improved.

[0105] Figure 9 This is a schematic plan view of a transparent display device according to a third embodiment of the present disclosure.

[0106] like Figure 9 As shown, the transparent display device 300 according to the third embodiment of this disclosure includes: a first transparent display panel to a third transparent display panel 201, 202, and 203 arranged along a first direction, and a fourth transparent display panel to a sixth transparent display panel 204, 205, and 206 arranged along the first direction and disposed in a second direction perpendicular to the first direction relative to the first transparent display panel 201 to the third transparent display panel 203. That is, the first transparent display panel 201 to the sixth transparent display panel 206 are arranged in a 3×2 matrix shape.

[0107] Each of the first transparent display panel 201 to the sixth transparent display panel 206 can be referenced. Figures 6 to 8 The transparent display device described according to the second embodiment of this disclosure has a substantially the same structure or configuration.

[0108] That is, refer to Figures 6 to 8Each of the first transparent display panels 201 to the sixth transparent display panels 206 includes a display area DA and a first border area BA1 to a fourth border area BA4 surrounding the display area DA. Within the display area DA, each defines a plurality of pixel areas P, including a light-emitting portion EA and a transparent portion TA.

[0109] In the first border region BA1, a pad electrode 158 electrically connected to the pixel region P is disposed on the first substrate 110, and a color filter pattern 124 is disposed on the second substrate 120. Additionally, a transparent dam 130 is disposed between the first substrate 110 and the second substrate 120. The transparent dam 130 is also disposed in the second border regions BA2 to the fourth border regions BA4, while the pad electrode and the color filter pattern are not present in the second border regions BA2 to the fourth border regions BA4.

[0110] Refer again Figure 9 The first sides of the first transparent display panel 201 to the third transparent display panel 203 are arranged to face the fourth transparent display panel 204 to the sixth transparent display panel 206 respectively, and the pad electrodes 158 in the first transparent display panel 201 to the third transparent display panel 203 ( Figure 6 The first border area BA1, where the color filter pattern 124 is located, is located on the second side opposite to the first side.

[0111] Relative to the first to third transparent display panels 201, the fourth to sixth transparent display panels 206 are disposed in a second direction perpendicular to the first direction. The third sides of the fourth to sixth transparent display panels 204 are arranged to face the first to third transparent display panels 203 respectively, and the pad electrodes 158 in the fourth to sixth transparent display panels 204 are respectively disposed facing the first to third transparent display panels 203. Figure 6 The first border area BA1, where the color filter pattern 124 is located, is located on the fourth side opposite to the third side.

[0112] That is, the first transparent display panel 201 to the sixth transparent display panel 206 are arranged such that the second border area BA2 to the fourth border area BA4, in which there are transparent dams 130 but no pad electrodes and color filter patterns, are adjacent to each other, and the first border area BA1 in which there are pad electrodes 158 and color filter patterns 124 of the first transparent display panel 201 to the sixth transparent display panel 206 is located on both sides (e.g., the upper and lower sides) of the transparent display device 300. In other words, the first border area BA1 in which there are pad electrodes 158 and color filter patterns 124 is located at the two edges of the transparent display device 300.

[0113] The color filter patterns 124 in the first transparent display panel 201 to the sixth transparent display panel 206 can have the same color or different colors. That is, the color filter patterns 124 in the first transparent display panel 201 to the sixth transparent display panel 206 can be formed of the same material or different materials.

[0114] exist Figure 9 In this configuration, six transparent display panels 201 to 206 are arranged in a 3×2 matrix shape. Alternatively, at least one transparent display panel may be arranged in each of the first and second rows along a first direction, and the border areas of the transparent display panels in the first and second rows, in which the pad electrodes 158 and color filter patterns 124 are located, may be positioned on the outside in a second direction perpendicular to the first direction. The number of transparent display panels in each row is not limited.

[0115] In the transparent display device 300 according to the third embodiment of the present disclosure, the visibility difference between the display area and the frame area and the ambient light reflection caused by the pad electrodes are minimized or prevented, and the viewing problem of the boundary between adjacent transparent display panels is prevented.

[0116] Figure 10 This is a schematic plan view of a transparent display device according to the fourth embodiment of the present disclosure.

[0117] like Figure 10 As shown, the transparent display device 400 according to the fourth embodiment of the present disclosure includes: a display area DA including a plurality of pixel areas P; a first border area to a fourth border area BA1, BA2, BA3 and BA4 surrounding the display area DA; a first pad electrode 158 and a second pad electrode 159 respectively disposed in the first border area BA1 and the third border area BA3 and electrically connected to the pixel areas P; a transparent dam (not shown) located in the first border area BA1 to the fourth border area BA4; a color filter pattern 124 located in the first border area BA1; and a second color filter pattern 125 located in the third border area BA3.

[0118] Each of the first pad electrode 158 and the second pad electrode 159 can be connected to an external driving component. For example, the first pad electrode 158 and the second pad electrode 159 can be connected to a data driver IC 192 and a strobe driver IC 194, respectively.

[0119] In the transparent display device 400 according to the fourth embodiment of this disclosure, a transparent dam is provided in all the first border areas BA1 to the fourth border areas BA4, while color filter patterns 124 and 125 are provided in the border areas in which the first pad electrode 158 and the second pad electrode 159 are formed. That is, color filter patterns 124 and 125 are provided in the first border areas BA1 and the third border areas BA3, but not in the second border areas BA2 and the fourth border areas BA4. In the second border areas BA2 and the fourth border areas BA4, there are transparent dams without color filter patterns 124 and 125 and pad electrodes 158 and 159.

[0120] In other words, in two adjacent border regions (i.e., the first border region BA1 and the third border region BA3), the first pad electrode 158 and the second pad electrode 159 are disposed on the first substrate 110. Figure 7 On the second substrate 120, and the color filter patterns 124 and 125 are disposed on the second substrate 120. Figure 7 (Of). Additionally, transparent dam 130 ( Figure 7 The transparent dam 130 is disposed between the first substrate 110 and the second substrate 120. The transparent dam 130 is also disposed in the second border area BA2 and the fourth border area BA4, while the pad electrode and color filter pattern are not present in the second border area BA2 and the fourth border area BA4.

[0121] Because transparent dams with high light transmittance are provided in the second frame area BA2 and the fourth frame area BA4, the second frame area BA2 and the fourth frame area BA4 have similar or substantially the same optical properties as the transparent portion of the display area DA. On the other hand, because the first color filter pattern 124 and the second color filter pattern 125 are respectively provided in the first frame area BA1 and the third frame area BA3, ambient light reflection caused by the first pad electrode 158 and the second pad electrode 159 is reduced in the first frame area BA1 and the third frame area BA3. In addition, because light passing through the first color filter pattern 124 and the second color filter pattern 125 is displayed in the first frame area BA1 and the third frame area BA3, the visibility difference between the display area DA and the frame area BA is reduced.

[0122] Figure 11 This is a schematic plan view of a transparent display device according to the fifth embodiment of the present disclosure.

[0123] like Figure 11As shown, the transparent display device 500 according to the fifth embodiment of this disclosure includes: a first transparent display panel 401 and a second transparent display panel 402 arranged along a first direction; and a third transparent display panel 403 and a fourth transparent display panel 404 arranged along the first direction and disposed in a second direction perpendicular to the first direction relative to the first transparent display panels 401 and 402. That is, the first transparent display panels 401 to the fourth transparent display panels 404 are arranged in a 2×2 matrix shape.

[0124] Each of the first transparent display panel 401 to the fourth transparent display panel 404 can be connected to, according to Figure 10 The transparent display device described according to the fourth embodiment of this disclosure has a substantially the same structure or configuration.

[0125] That is, refer to Figure 10 Each of the first transparent display panel 401 to the fourth transparent display panel 404 includes a display area DA and a first border area BA1 to a fourth border area BA4 surrounding the display area DA. Within the display area DA, a plurality of pixel areas P are defined, each including a light-emitting portion EA and a transparent portion TA.

[0126] In two adjacent border regions (i.e., the first border region BA1 and the third border region BA3), a first pad electrode 158 and a second pad electrode 159 electrically connected to the pixel region P are disposed on the first substrate 110, and second color filter patterns 124 and 125 are disposed on the second substrate 120. Furthermore, a transparent dam 130 is disposed between the first substrate 110 and the second substrate 120. The transparent dam 130 is also disposed in the second border region BA2 and the fourth border region BA4, where no pad electrodes or color filter patterns are present.

[0127] In the first to fourth transparent display panels 401 of the transparent display device 500, the second border area BA2 and the fourth border area BA4 are arranged adjacent to each other, and the first border area BA1 and the third border area BA3 are arranged to surround the edge of the transparent display device 500. In other words, the first border area BA1 and the third border area BA3 of the first to fourth transparent display panels 401 form a rectangular frame shape, and the second border area BA2 and the fourth border area BA4 of the first to fourth transparent display panels 401 are disposed in the internal space surrounded by the first border area BA1 and the third border area BA3.

[0128] The first transparent display panel 401 to the fourth transparent display panel 404 are arranged such that the second border area BA2 and the fourth border area BA4, in which there is a transparent dam 130 but no pad electrodes and color filter patterns, are adjacent to each other, and the first border area BA1 and the third border area BA3, in which there are pad electrodes 158 and 159 and color filter patterns 124 and 125, of the first transparent display panel 401 to the fourth transparent display panel 404 are located at the edge of the transparent display device 500.

[0129] The first color filter pattern 124 and the second color filter pattern 125 in the first transparent display panel 401 to the fourth transparent display panel 404 can have the same color or different colors. That is, the first color filter pattern 124 and the second color filter pattern 125 in the first transparent display panel 401 to the fourth transparent display panel 404 can be formed of the same material or different materials.

[0130] Although not shown, a transparent display panel including pad electrodes and color filter patterns only in the third border area can be further arranged between the first transparent display panel 401 and the third transparent display panel 403, and between the second transparent display panel 402 and the fourth transparent display panel 404.

[0131] In the transparent display device 500 according to the fifth embodiment of the present disclosure, the visibility difference between the display area and the frame area and the ambient light reflection caused by the pad electrodes are minimized or prevented, and the viewing problem of the boundary between adjacent transparent display panels is prevented.

[0132] Figure 12 This is a schematic plan view of a transparent display device according to the sixth embodiment of the present disclosure.

[0133] like Figure 12 As shown, the transparent display device 600 according to the sixth embodiment of this disclosure includes: a first transparent display panel to a third transparent display panel 601, 602, and 603 arranged along a first direction; and a fourth transparent display panel to a sixth transparent display panel 604, 605, and 606 arranged along the first direction and disposed relative to the first transparent display panel 601 to the third transparent display panel 603 in a second direction perpendicular to the first direction. That is, the first transparent display panel 601 to the sixth transparent display panel 606 are arranged in a 3×2 matrix shape.

[0134] Each of the second transparent display panel 602 and the fifth transparent display panel 605 can be referenced. Figures 6 to 8The transparent display device described according to the second embodiment of this disclosure has substantially the same structure or configuration. Each of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606 can be compared with the referenced... Figure 10 The transparent display device described in the fourth embodiment of the present invention has a substantially the same structure or construction.

[0135] Reference Figures 6 to 8 Each of the second transparent display panel 602 and the fifth transparent display panel 605 includes a display area DA and first border areas BA1 to fourth border areas BA4 surrounding the display area DA. In the display area DA, multiple pixel areas P are defined, each including a light-emitting portion EA and a transparent portion TA. In the first border area BA1, pad electrodes 158 electrically connected to the pixel areas P are disposed on the first substrate 110, and a color filter pattern 124 is disposed on the second substrate 120. Additionally, a transparent dam 130 is disposed between the first substrate 110 and the second substrate 120. The transparent dam 130 is also disposed in the second border areas BA2 to fourth border areas BA4, where no pad electrodes or color filter patterns are present.

[0136] Reference Figure 10 Each of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606 includes a display area DA and a first border area BA1 to a fourth border area BA4 surrounding the display area DA. Within the display area DA, multiple pixel areas P are defined, each including a light-emitting portion EA and a transparent portion TA.

[0137] In two adjacent border regions (i.e., the first border region BA1 and the third border region BA3), a first pad electrode 158 and a second pad electrode 159 electrically connected to the pixel region P are disposed on the first substrate 110, and second color filter patterns 124 and 125 are disposed on the second substrate 120. Additionally, a transparent dam 130 is disposed between the first substrate 110 and the second substrate 120. The transparent dam 130 is also disposed in the second border region BA2 and the fourth border region BA4, where no pad electrodes or color filter patterns are present.

[0138] The first side of the second transparent display panel 602 is arranged to face the fifth transparent display panel 605, and a pad electrode 158 is provided in the second transparent display panel 602. Figure 6 (of) and the first border area BA1 of the color filter pattern 124 Figure 6 The first side is set on the second side opposite to the first side.

[0139] The third side of the fifth transparent display panel 605 is arranged to face the second transparent display panel 602, and the first border area BA1 of the fifth transparent display panel 605, which is provided with pad electrodes 158 and color filter pattern 124, is arranged on the fourth side opposite to the third side.

[0140] In the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606 of the transparent display device 600, the second border area BA2 and the fourth border area BA4 are arranged to face the adjacent transparent display panels, and the first border area BA1 and the third border area BA3 are arranged with the first border area BA1 of the second transparent display panel 602 and the fifth transparent display panel 605 to surround the edge of the transparent display device 600. In other words, the first border area BA1 and the third border area BA3 of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606, as well as the first border area BA1 of the second transparent display panel 602 and the fifth transparent display panel 605, form a rectangular frame shape. The second border areas BA2 and the fourth border area BA4 of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606, as well as the second border areas BA2 to the fourth border areas BA4 of the second transparent display panel 602 and the fifth transparent display panel 605, are located in the internal space surrounded by the first border areas BA1 and the third border area BA3 of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606, as well as the first border area BA1 of the second transparent display panel 602 and the fifth transparent display panel 605.

[0141] The first transparent display panel 601 to the sixth transparent display panel 606 are arranged such that the second border area BA2 and the fourth border area BA4 of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604 and the sixth transparent display panel 606, which have transparent dams 130 but no pad electrodes and color filter patterns, are adjacent to the second border area BA2 to the fourth border area BA4 of the second transparent display panel 602 and the fifth transparent display panel 605, which have transparent dams 130 but no pad electrodes and color filter patterns. The first border area BA1 and the third border area BA3 of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604 and the sixth transparent display panel 606, which have pad electrodes 158 and 159 and color filter patterns 124 and 125, and the first border area BA1 of the second transparent display panel 602 and the fifth transparent display panel 605, which have pad electrodes 158 and color filter patterns 124, are located at the edge of the transparent display device 600.

[0142] In each of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606, the first color filter pattern 124 and the second color filter pattern 125 may have the same color or different colors. That is, the first color filter pattern 124 and the second color filter pattern 125 in each of the first transparent display panel 601, the third transparent display panel 603, the fourth transparent display panel 604, and the sixth transparent display panel 606 may be formed of the same material or different materials.

[0143] Furthermore, the color filter patterns 124 and 125 of the first transparent display panel 601 to the sixth transparent display panel 606 can have the same color or different colors. That is, the first color filter pattern 124 and the second color filter pattern 125 in the first transparent display panel 601 to the sixth transparent display panel 606 can be formed of the same material or different materials.

[0144] exist Figure 12 In this configuration, a transparent display panel (i.e., a second transparent display panel 602) is disposed between the first transparent display panel 601 and the third transparent display panel 603, and a transparent display panel (i.e., a fifth transparent display panel 605) is disposed between the fourth transparent display panel 604 and the sixth transparent display panel 606. Alternatively, two or more second transparent display panels 602 may be disposed between the first transparent display panel 601 and the third transparent display panel 603, and two or more fifth transparent display panels 605 may be disposed between the fourth transparent display panel 604 and the sixth transparent display panel 606.

[0145] Additionally, a transparent display panel that includes pad electrodes and color filter patterns only in the third border area can be further arranged between the first transparent display panel 601 and the fourth transparent display panel 604, and between the third transparent display panel 603 and the sixth transparent display panel 606.

[0146] In the transparent display device 600 according to the sixth embodiment of the present disclosure, the visibility difference between the display area and the frame area and the ambient light reflection caused by the pad electrodes are minimized or prevented, and the viewing problem of the boundary between adjacent transparent display panels is prevented.

[0147] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from the spirit or scope thereof. Therefore, this disclosure is intended to cover any modifications and variations that fall within the scope of the appended claims and their equivalents.

[0148] Cross-reference to related applications

[0149] This application claims priority to Korean Patent Application No. 10-2020-0078343, filed in Korea on June 26, 2020, the entire contents of which are incorporated herein by reference.

Claims

1. A transparent display device, the transparent display device comprising: A first substrate includes a display area and a first border area, a second border area, a third border area and a fourth border area surrounding the display area, wherein the display area includes a plurality of pixel areas, each containing a light-emitting portion and a transparent portion; A second substrate, which faces the first substrate; A transparent dam is located between the first substrate and the second substrate and within the first border area, the second border area, the third border area, and the fourth border area; A color filter layer, which corresponds to the plurality of pixel areas, includes a red color filter pattern, a green color filter pattern, and a blue color filter pattern; A first pad electrode, the first pad electrode being located on the first substrate and within the first border region; and A first color filter pattern is located on the second substrate and within the first border area. The first color filter pattern has a single-layer structure formed by one of the color filter patterns: the red color filter pattern, the green color filter pattern, and the blue color filter pattern.

2. The transparent display device according to claim 1, further comprising: The second pad electrode is located on the first substrate and in the third border region adjacent to the first border region; as well as A second color filter pattern is located on the second substrate and within the third border area.

3. The transparent display apparatus of claim 2, wherein, The first color filter pattern and the second color filter pattern are formed of the same material or different materials.

4. The transparent display apparatus of claim 1, wherein, In the light-emitting portion, a light-emitting diode is disposed on the first substrate, and The color filter layer corresponds to the light-emitting diode and is disposed on the second substrate.

5. The transparent display apparatus of claim 4, wherein, The first color filter pattern and the color filter layer in the pixel area adjacent to the first border area are formed of the same material.

6. The transparent display device according to claim 1, wherein, The transparent dam comprises a polymer resin, a getter, and spacers, wherein the getter is magnesium oxide (MgO) or zirconium oxide (ZrO), and the polymer resin is one of olefin resin, epoxy resin, polyurethane resin, and combinations thereof.

7. The transparent display apparatus of claim 1, wherein, The first color filter pattern corresponds to the first pad electrode.

8. A transparent display device, the transparent display device comprising: A first transparent display panel and a second transparent display panel are arranged along a first direction, and each of the first transparent display panel and the second transparent display panel includes: A first substrate, the first substrate including a first display area and a first border area surrounding the first display area. The second border area, the third border area, and the fourth border area, wherein the first display area includes a plurality of first pixel areas, each containing a first light-emitting portion and a second transparent portion; A second substrate, which faces the first substrate; A first transparent dam is located between the first substrate and the second substrate and within the first border area, the second border area, the third border area, and the fourth border area; A first color filter layer, which corresponds to the plurality of first pixel regions, includes a first red color filter pattern, a first green color filter pattern, and a first blue color filter pattern. A first pad electrode, the first pad electrode being located on the first substrate and within the first border region; and A first color filter pattern, the first color filter pattern being located on the second substrate and within the first border area; and A third transparent display panel and a fourth transparent display panel are disposed in a second direction perpendicular to the first direction and arranged along the first direction relative to the first transparent display panel and the second transparent display panel, and each of the third transparent display panel and the fourth transparent display panel includes: The third substrate includes a second display area and a fifth border area, a sixth border area, a seventh border area and an eighth border area surrounding the second display area, wherein the second display area includes a plurality of second pixel areas, each containing a second light-emitting portion and a second transparent portion; A fourth substrate, which faces the third substrate; The second transparent dam is located between the third substrate and the fourth substrate and within the fifth border area, the sixth border area, the seventh border area and the eighth border area; The second color filter layer corresponds to the plurality of second pixel areas, and the second color filter layer includes a second red color filter pattern, a second green color filter pattern, and a second blue color filter pattern. A second pad electrode, the second pad electrode being located on the third substrate and within the fifth border region; and A second color filter pattern is located on the fourth substrate and within the fifth border area. Wherein, the first border area of ​​the first transparent display panel and the second transparent display panel is disposed on the opposite side to the fifth border area of ​​the third transparent display panel and the fourth transparent display panel, wherein the first color filter pattern has a single-layer structure formed by one of the first red color filter pattern, the first green color filter pattern and the first blue color filter pattern, and The second color filter pattern has a single-layer structure formed by one of the second red color filter pattern, the second green color filter pattern, and the second blue color filter pattern.

9. The transparent display apparatus of claim 8, wherein, Each of the first transparent display panel and the second transparent display panel further includes: a third pad electrode located on the first substrate and within the third border region adjacent to the first border region; and a third color filter pattern located on the second substrate and within the third border region. Each of the third and fourth transparent display panels further includes: a fourth pad electrode located on the third substrate and within the seventh border region adjacent to the fifth border region; and a fourth color filter pattern located on the fourth substrate and within the seventh border region. The third border area of ​​the first transparent display panel is located on the opposite side of the third border area of ​​the second transparent display panel. The seventh border area of ​​the third transparent display panel is located on the opposite side of the seventh border area of ​​the fourth transparent display panel.

10. The transparent display apparatus of claim 9, wherein, The first color filter pattern and the third color filter pattern are formed of the same material or different materials.

11. The transparent display apparatus of claim 9, wherein, The second color filter pattern and the fourth color filter pattern are formed from the same material or different materials.

12. The transparent display device according to claim 9, further comprising: A fifth transparent display panel and a sixth transparent display panel are respectively disposed between the first transparent display panel and the second transparent display panel, and between the third transparent display panel and the fourth transparent display panel. Each of the fifth transparent display panel and the sixth transparent display panel includes: The fifth substrate includes a third display area and a ninth, tenth, eleventh, and twelfth border area surrounding the third display area, wherein the third display area includes a plurality of third pixel areas, each containing a third light-emitting portion and a third transparent portion. A sixth substrate, which faces the fifth substrate; The third transparent dam is located between the fifth substrate and the sixth substrate and within the ninth border region, the tenth border region, the eleventh border region and the twelfth border region; The fifth pad electrode is located on the fifth substrate and within the ninth border region; and A fifth color filter pattern is located on the sixth substrate and within the ninth border area.

13. The transparent display device of claim 12, wherein, The ninth border area of ​​the fifth transparent display panel is disposed on one side of the first border area, and the ninth border area of ​​the sixth transparent display panel is disposed on one side of the fifth border area.

14. The transparent display device according to claim 8, wherein, The first color filter pattern and the second color filter pattern are formed of the same material or different materials.

15. The transparent display device according to claim 8, further comprising: A fifth transparent display panel and a sixth transparent display panel are respectively disposed between the first transparent display panel and the third transparent display panel, and between the second transparent display panel and the fourth transparent display panel. Each of the fifth transparent display panel and the sixth transparent display panel includes: The fifth substrate includes a third display area and a ninth, tenth, eleventh, and twelfth border area surrounding the third display area, wherein the third display area includes a plurality of third pixel areas, each containing a third light-emitting portion and a third transparent portion. A sixth substrate, which faces the fifth substrate; The third transparent dam is located between the fifth substrate and the sixth substrate and within the ninth border region, the tenth border region, the eleventh border region and the twelfth border region; The fifth pad electrode is located on the fifth substrate and within the eleventh border region; and A fifth color filter pattern is located on the sixth substrate and within the eleventh border area.

16. The transparent display device of claim 15, wherein, The eleventh border area of ​​the fifth transparent display panel is located on the opposite side of the eleventh border area of ​​the sixth transparent display panel.

17. The transparent display device of claim 8, wherein, In the first light-emitting portion of each of the first and second transparent display panels, a light-emitting diode is disposed on the first substrate. The first color filter layer corresponds to the light-emitting diode and is disposed on the second substrate. In each of the third and fourth transparent display panels, a light-emitting diode is disposed on the third substrate in the second light-emitting portion. The second color filter layer corresponds to the light-emitting diode and is disposed on the fourth substrate.

18. The transparent display apparatus of claim 16, wherein, The first color filter pattern and the color filter layer in the first pixel area adjacent to the first border area are formed of the same material. The second color filter pattern and the color filter layer in the second pixel area adjacent to the fifth border area are formed of the same material.

19. The transparent display apparatus of claim 8, wherein, Each of the first and second transparent dams includes a polymer resin, a getter, and a spacer, wherein the getter is magnesium oxide (MgO) or zirconium oxide (ZrO), and the polymer resin is one of olefin resin, epoxy resin, polyurethane resin, and combinations thereof.

20. The transparent display apparatus of claim 8, wherein, The first color filter pattern corresponds to the first pad electrode, and the second color filter pattern corresponds to the second pad electrode.

Images