Transparent display device

Abstract

To provide a transparent display device with a high light transmittance.SOLUTION: A transparent display device according to one or more embodiments of this specification may include: a substrate; a transmissive area; a non-transmissive area including a light-emitting area where a light-emitting element is arranged; at least one power line arranged in the non-transmissive area on the substrate and extending in a first direction; at least one trench line arranged in the transmissive area on the substrate and extending in the first direction; and an auxiliary power contact unit arranged in the transmissive area on the substrate, electrically connected to an auxiliary power line extending from at least one power line in a second direction crossing the first direction, and overlapping at least a part of at least one trench line.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This specification relates to a transparent display device.

Background Art

[0002] As the information society develops, the requirements for display devices for displaying images are increasing in various forms. Therefore, recently, display devices such as liquid crystal displays (LCDs), organic light-emitting displays (OLEDs), micro light-emitting diode displays (Micro LED Displays), and quantum dot displays (QDs) have been utilized.

[0003] Recently, research on transparent display devices that not only display images but also allow light to pass through so that objects or images located behind the display device can be seen has been actively conducted. The transparent display device includes a display area and a non-display area for displaying an image, and the display area can include a transmissive area and a non-transmissive area that can transmit external light. The transparent display device can have a high light transmittance in the display area through the transmissive area.

[0004] Such transparent display devices have high potential for utilization in various fields in that the image and the background can be seen together. However, since the application fields and uses are diverse, it is necessary to manufacture them in multiple varieties (or various sizes). However, when transparent display devices are manufactured in multiple varieties (or various sizes), there is a problem that the manufacturing cost and production energy increase due to an increase in the number of processes.

Summary of the Invention

Problems to be Solved by the Invention

[0005] One or more problems to be solved by embodiments of the present specification are to provide a transparent display device having a cathode contact portion with a simplified structure and having a high light transmittance.

[0006] One or more problems to be solved by embodiments of the present specification are to provide a transparent display device capable of reducing the occurrence of defects due to moisture penetration.

[0007] One or more problems to be solved by embodiments of the present specification are to provide a transparent display device that can be manufactured in multiple varieties (or various sizes).

[0008] One or more problems to be solved by embodiments of the present specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Means for Solving the Problems

[0009] A transparent display device according to one or more embodiments of the present specification includes a substrate, a transmissive region, a non-transmissive region including a light-emitting region where light-emitting elements are arranged, at least one power line arranged on the substrate in the non-transmissive region and extending in a first direction, at least one trench line arranged on the substrate in the transmissive region and extending in the first direction, and an auxiliary power contact portion arranged on the substrate in the transmissive region, electrically connected to an auxiliary power line extending in a second direction intersecting the first direction from at least one power line, and overlapping at least a part of at least one trench line. Specific matters according to various examples of the present specification other than the means for solving the above-mentioned problems are included in the following description and drawings.

Effects of the Invention

[0010] According to one or more embodiments of the present specification, it is possible to provide a transparent display device having a cathode contact portion with a simple structure and having a high light transmittance.

[0011] According to one or more embodiments of the present specification, it is possible to provide a transparent display device capable of reducing the occurrence of defects due to moisture penetration.

[0012] According to one or more embodiments of the present specification, it is possible to provide a transparent display device that can be manufactured in multiple varieties (or various sizes).

[0013] The effects of the present specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understandable to those skilled in the art from the following description.

[0014] Since the contents of the invention described in the above problems to be solved, means for solving the problems, and effects do not specify the essential features of the claims, the scope of rights of the claims is not limited by the matters described in the contents of the invention.

Brief Description of the Drawings

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DETAILED DESCRIPTION OF THE INVENTION

[0016] The advantages, features, and the methods for achieving them of this specification will become apparent by referring to various examples described in detail hereinafter based on the accompanying drawings. However, this specification is not limited to an example disclosed below, and can be configured in various different forms. Examples such as those in this specification are merely to complete the disclosure of this specification and are provided to fully inform those with ordinary knowledge in the technical field to which the technical idea of this specification belongs of the scope of the technical idea. The technical idea of this specification is only defined by the scope of the claims.

[0017] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary, so this specification is not limited to the matters shown in the drawings. The same reference numerals throughout the specification indicate the same components. Also, in the description of this specification, when it is determined that a specific description of related known technologies may unnecessarily obscure the gist of this specification, the detailed description thereof will be omitted.

[0018] When using terms such as "including", "having", "becoming", etc. mentioned in this specification, unless "only" is used, other parts can be added. When a component is expressed in the singular, unless there is a specific description to the contrary, it includes the case of including a plurality.

[0019] In the interpretation of components, even if there is no separate explicit description regarding the error range, it is interpreted as including the error range.

[0020] In the case of an explanation of the positional relationship, for example, when explaining the positional relationship between two parts such as "on ~", "above ~", "below ~", or "next to ~", unless "immediately" or "directly" is used, one or more other parts can also be located between the two parts.

[0021] In the case of an explanation of the time relationship, for example, when explaining the chronological order such as "after ~", "subsequent to ~", "next to ~", or "before ~", unless "immediately" or "directly" is used, it can also include the case where it is not continuous.

[0022] Terms such as first, second, etc. are used to describe various components, but these components are not limited to these terms. These terms are only used to distinguish one component from another. Thus, the first component referred to below may also be the second component within the technical concept of this specification.

[0023] In the description of the components of this specification, terms such as first, second, A, B, (a), or (b) can be used. Such terms are only for distinguishing the component from other components, and the essence, order, sequence, or number of the component is not limited by such terms.

[0024] When a component is described as being "connected", "coupled", "attached", or "joined" to another component, that component can be directly connected, coupled, attached, or joined to the other component, but it should be understood that other components may also be interposed between the components that can be indirectly connected, coupled, attached, or joined, unless otherwise expressly stated.

[0025] When a component or layer is described as "contacting" or "overlapping" another component or layer, the component or layer can directly contact or overlap the other component or layer, but it should be understood that other components may also be interposed between the components that can indirectly contact or overlap, unless otherwise expressly stated.

[0026] "At least one" should be understood to include all combinations of one or more of the related components. For example, the meaning of "at least one of the first, second, and third components" can be said to include not only the first, second, or third component, but also combinations of two or more of the first, second, and third components.

[0027] The features of many embodiments described in this specification can be partially or wholly combined or combined with each other, enabling various technical linkages and drives. Each embodiment can be implemented independently of the others or implemented together in an associated relationship.

[0028] Hereinafter, embodiments of this specification will be described based on the accompanying drawings and examples. Since the scale of the components shown in the drawings has a scale different from the actual one for the convenience of explanation, it is not limited to the scale shown in the drawings.

[0029] FIG. 1 is a diagram showing a transparent display device according to an embodiment of this specification. FIG. 2 is a circuit diagram of a sub-pixel of the transparent display device according to an embodiment of this specification.

[0030] Hereinafter, the X-axis indicates the direction parallel to the scan line, the Y-axis indicates the direction parallel to the data line, and the Z-axis indicates the height direction of the transparent display device.

[0031] The transparent display device according to an embodiment of this specification will be mainly described when it is constituted by an Organic Light Emitting Display (OLED), but it can also be constituted by a Liquid Crystal Display (LCD), a Micro Light Emitting Diode (Micro LED Display), a Quantum Dot Display (QD), etc.

[0032] Referring to FIGS. 1 and 2, a transparent display device according to an embodiment of this specification can include a transparent display panel 110 including a display area DA for displaying an image composed of pixels and a non-display area NDA for not displaying an image.

[0033] The display area DA of the transparent display panel 110 can include a first signal line SL1, a second signal line SL2, and pixels, and the non-display area NDA can include a pad area PA where pads are arranged and at least one gate driving unit 205.

[0034] The first signal line SL1 can extend in the first direction (or the Y-axis direction) and can intersect the second signal line SL2 in the display area DA. The second signal line SL2 can extend in the second direction (or the X-axis direction). The pixel is arranged in the area where the first signal line SL1 and the second signal line SL2 intersect, and can emit predetermined light to display an image.

[0035] The gate driving unit 205 can be connected to the scan line to supply a scan signal. Such a gate driving unit 205 can be configured in a GIP (gate driver in panel) method or a TAB (tape automated bonding) method in the non-display area NDA outside one or both sides of the display area DA of the transparent display panel 110.

[0036] In the pad area PA of the transparent display panel 110, a source drive integrated circuit, a circuit board, a timing control unit, etc. connected via a flexible circuit film can be electrically connected.

[0037] Referring to FIG. 2, each of the pixels can include a plurality of sub-pixels constituting a unit pixel, and each of the plurality of sub-pixels can include a circuit element having a 3T (Transistor) 1C (Capacitor) structure including a first switching transistor TR1, a second switching transistor TR2, a driving transistor DTR, and a capacitor Cst, and a light emitting element ED, but is not necessarily limited thereto. Each sub-pixel can further include a compensation circuit. In such a case, the pixel can have various structures such as 4T2C, 5T2C, 6T1C, 6T2C, 7T1C, 7T2C.

[0038] Each of the transistors DTR, TR1, and TR2 of each sub-pixel can include a gate electrode, a source electrode, and a drain electrode. Since the source electrode and the drain electrode are not fixed and can be changed according to the direction of the voltage and current applied to the gate electrode, either one of the source electrode and the drain electrode can be expressed as the first electrode, and the other can be expressed as the second electrode. Each of the transistors DTR, TR1, and TR2 of each sub-pixel can use at least one of a polysilicon semiconductor, an amorphous silicon semiconductor, and an oxide semiconductor. The transistors DTR, TR1, and TR2 can be of P-type or N-type, or a mixture of P-type and N-type.

[0039] The first switching transistor TR1 can serve to supply the data voltage Vdata supplied from the data line DL to the driving transistor DTR. For example, the first switching transistor TR1 can charge the capacitor Cst with the data voltage Vdata supplied from the data line DL. For this purpose, the gate electrode of the first switching transistor TR1 can be connected to the scan line SCANL (or gate line), and the first electrode can be connected to the data line DL. Also, the second electrode of the first switching transistor TR1 can be connected to one end of the capacitor Cst and the gate electrode of the driving transistor DTR.

[0040] The first switching transistor TR1 can be turned on in response to the scan signal Scan applied via the scan line SCANL (or gate line). When the first switching transistor TR1 is turned on, the data voltage Vdata applied via the data line DL can be transmitted to one end of the capacitor Cst.

[0041] The second switching transistor TR2 can serve to supply the driving transistor DTR with the reference voltage Vref supplied from the reference line REFL. For example, the second switching transistor TR can have its gate electrode connected to the scan line SCANL (or gate line) and its first electrode connected to the reference line REFL. Also, the second electrode of the second switching transistor TR2 can be connected to the first electrode of the driving transistor DTR and the other end of the capacitor Cst.

[0042] The second switching transistor TR2 can be turned on in response to the scan signal Scan applied via the scan line SCANL (or gate line). When the second switching transistor TR2 is turned on, the reference voltage Vref applied via the reference line REFL can be transmitted to the other end of the capacitor Cst. Also, the reference voltage Vref can be applied to the source electrode of the driving transistor DTR.

[0043] The capacitor Cst can serve to maintain the data voltage Vdata supplied to the driving transistor DTR for one frame. For example, the capacitor Cst can have its first electrode connected to the gate electrode of the driving transistor DTR and its second electrode connected to the source electrode of the driving transistor DTR. The capacitor Cst can store a voltage corresponding to the data voltage Vdata transmitted via the first switching transistor TR1 and turn on the driving transistor DTR with the stored voltage.

[0044] The driving transistor DTR can serve to generate a data current with the first power supply EVDD supplied from the pixel power line VDDL (or first power line) and supply it to the anode electrode of the light-emitting element ED. For example, the driving transistor DTR can have its gate electrode connected to one end of the capacitor Cst and its first electrode connected to the pixel power line VDDL. Also, the second electrode of the driving transistor DTR can be connected to the anode electrode of the light-emitting element ED.

[0045] The light-emitting element ED can include an anode electrode connected to the driving transistor DTR, a cathode electrode to which a second power supply EVSS is supplied from a common power supply line VSSL (or a second power supply line), and a light-emitting layer between the anode electrode and the cathode electrode. The anode electrode is an independent electrode for each light-emitting element, while the cathode electrode can be a common electrode shared by all the light-emitting elements. When a driving current is supplied to the light-emitting element ED from the driving transistor DTR, electrons from the cathode electrode are injected into the light-emitting layer, holes from the anode electrode are injected into the light-emitting layer, and fluorescence or phosphorescence substances are caused to emit light by recombination of electrons and holes in the light-emitting layer, thereby generating light with a brightness proportional to the current value of the driving current.

[0046] The anode electrode of the light-emitting element ED can be connected to the second electrode of the driving transistor DTR, and the cathode electrode can be connected to the common power supply line VSSL. The light-emitting element ED can emit light corresponding to the driving current generated by the driving transistor DTR.

[0047] FIG. 3 is a diagram showing the A region of FIG. 1 according to an embodiment of the present specification. FIG. 4 is a diagram showing the B region of FIG. 3 according to an embodiment of the present specification.

[0048] Referring to FIGS. 3 and 4 together with FIGS. 1 and 2, the transparent display panel 110 according to an embodiment of the present specification can include a display region DA and a non-display region NDA. The display region DA can include a transmissive region TA and a non-transmissive region NTA. The transmissive region TA is a region that allows most of the light incident from the outside to pass through, and the non-transmissive region NTA can be a region that does not allow most of the light incident from the outside to pass through. For example, the transmissive region TA is a region where the light transmittance is greater than α%, and the non-transmissive region NTA can be a region where the light transmittance is less than β%. Here, α can be a value greater than β. Through the transmissive region TA of the transparent display panel 110, the things or background located on the back (or rear surface) of the transparent display panel 110 can be seen.

[0049] The non-transmissive region NTA can include a first non-transmissive region NTA1, a second non-transmissive region NTA2, and a pixel P.

[0050] The first non-transmissive region NTA1 extends from the display region DA in a first direction (or the Y-axis direction) and can be arranged so as to at least partially overlap with the light-emitting regions EA1, EA2, EA3, and EA4. The first non-transmissive region NTA1 can be composed of a plurality of elements. The plurality of first non-transmissive regions NTA1 can extend in the first direction (or the Y-axis direction) and can be arranged spaced apart from each other in a second direction (or the X-axis direction). Two adjacent first non-transmissive regions NTA1 can be arranged spaced apart from each other with a transmissive region TA therebetween. For example, a transmissive region TA can be arranged between two adjacent first non-transmissive regions NTA1. A first signal line SL1 extending in the first direction (or the Y-axis direction) can be arranged in the first non-transmissive region NTA1. For example, the first signal line SL1 can be arranged to overlap with the first non-transmissive region NTA1.

[0051] The first signal line SL1 can include at least one of a pixel power supply line VDDL (or a first power supply line), a common power supply line VSSL (or a second power supply line), a reference line REFL, and data lines DL1, DL2, DL3, and DL4. For example, the first signal line SL1 can further include a touch sensor line, but the embodiments of this specification are not limited thereto.

[0052] The pixel power supply line VDDL (or the first power supply line) can supply a first power supply EVDD to each driving transistor DTR of the sub-pixels SP1, SP2, SP3, and SP4 provided in the display region DA.

[0053] The common power supply line VSSL (or the second power supply line) can supply a second power supply EVSS to the cathode electrodes of the sub-pixels SP1, SP2, SP3, and SP4 provided in the display region DA. Here, the second power supply EVSS can be a common power supply commonly supplied to the sub-pixels SP1, SP2, SP3, and SP4.

[0054] The reference line REFL can supply an initialization voltage (or a reference voltage) to each of the driving transistors DTR of the sub-pixels SP1, SP2, SP3, and SP4 provided in the display area DA. For example, the reference line REFL can be arranged between a plurality of data lines DL1, DL2, DL3, and DL4. For example, the reference line REFL can be arranged at the center of the plurality of data lines DL1, DL2, DL3, and DL4.

[0055] Each of the data lines DL1, DL2, DL3, and DL4 can supply a data voltage Vdata to the sub-pixels SP1, SP2, SP3, and SP4. For example, the first data line DL1 supplies a first data voltage to the first driving transistor of the first sub-pixel SP1, the second data line DL2 supplies a second data voltage to the second driving transistor of the second sub-pixel SP2, the third data line DL3 supplies a third data voltage to the third driving transistor of the third sub-pixel SP3, and the fourth data line DL4 supplies a fourth data voltage to the fourth driving transistor of the fourth sub-pixel SP4.

[0056] The second non-transmissive region NTA2 extends from the display area DA in the second direction (or the X-axis direction) and can be arranged so as to at least partially overlap with the light-emitting regions EA1, EA2, EA3, and EA4. For example, the second non-transmissive region NTA2 can extend in the second direction (or the X-axis direction) between two adjacent first non-transmissive regions NTA1. The second non-transmissive region NTA2 can be composed of a plurality of regions. The plurality of second non-transmissive regions NTA2 extend in the second direction (or the X-side direction) and can be arranged at intervals from each other in the first direction (or the Y-axis direction). Two adjacent second non-transmissive regions NTA2 can be arranged at intervals from each other with the transmissive region TA therebetween. For example, the transmissive region TA can be arranged between two adjacent second non-transmissive regions NTA2. A second signal line SL2 extending in the second direction (or the X-axis direction) can be arranged in the second non-transmissive region NTA2. For example, the second signal line SL2 can be arranged so as to overlap with the second non-transmissive region NTA2.

[0057] The second signal line SL2 extends in the second direction (or the X-axis direction) and can include a scan line SCANL (or a gate line). The scan line SCANL can supply a scan signal to the sub-pixels SP1, SP2, SP3, SP4 of the pixel P.

[0058] The pixel P is arranged for each intersection region where the first non-transmissive region NTA1 and the second non-transmissive region NTA2 intersect, and can emit light to display an image. Each of the pixels P is arranged between adjacent transmissive regions TA, and the pixel P can include light-emitting regions EA1, EA2, EA3, EA4 where light-emitting elements are arranged to emit light. The light-emitting regions EA1, EA2, EA3, EA4 may correspond to regions that emit light in the pixel P. Since the area of the non-transmissive region NTA of the transparent display panel 110 is small, it can be arranged to overlap with the circuit element light-emitting regions EA1, EA2, EA3, EA4. For example, at least a part of the light-emitting regions EA1, EA2, EA3, EA4 can overlap with the circuit regions CA1, CA2, CA3, CA4 where circuit elements are arranged. For example, the circuit regions CA1, CA2, CA3, CA4 can include a first circuit region CA1 where a circuit element connected to the first sub-pixel SP1 is arranged, a second circuit region CA2 where a circuit element connected to the second sub-pixel SP2 is arranged, a third circuit region CA3 where a circuit element connected to the third sub-pixel SP3 is arranged, and a fourth circuit region CA4 where a circuit element connected to the fourth sub-pixel SP4 is arranged.

[0059] Each of the pixels P is provided in the first non-transmissive region NTA1 and can emit light to display an image. Each of the pixels P can 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 includes a first light-emitting region EA1 that emits first-color light, the second sub-pixel SP2 includes a second light-emitting region EA2 that emits second-color light, the third sub-pixel SP3 includes a third light-emitting region EA3 that emits third-color light, and the fourth sub-pixel SP4 can include a fourth light-emitting region EA4 that emits fourth-color light. The first to fourth sub-pixels SP1, SP2, SP3, and SP4 can be arranged in a matrix in a quad form along the first direction (or Y-axis direction) and the second direction (or X-axis direction). For example, the first sub-pixel SP1 and the second sub-pixel SP2 can be arranged adjacent to the pixel power line VDDL (or the first power line), and the third sub-pixel SP3 and the fourth sub-pixel SP4 can be arranged adjacent to the common power line VSSL (or the second power line).

[0060] The scan line SCANL can be connected to each of the pixels P corresponding to adjacent horizontal lines. For example, a horizontal line may mean that a plurality of pixels P are arranged side by side along the second direction (or the X-axis direction). For example, the scan line SCANL can be connected to the pixel P corresponding to the upper horizontal line among two adjacent horizontal lines. For example, the upper horizontal line may be a horizontal line corresponding to the pixel P located above with reference to the pixel P shown in FIG. 4. For example, the scan line SCANL (or the gate line) can be arranged adjacent to the first sub-pixel SP1 and the third sub-pixel SP3. Also, the scan line SCANL can be connected to the pixel P corresponding to the lower horizontal line among two adjacent horizontal lines. For example, the lower horizontal line may be a horizontal line corresponding to the pixel P located below with reference to the pixel P shown in FIG. 4. For example, the scan line SCANL (or the gate line) can be arranged adjacent to the second sub-pixel SP2 and the fourth sub-pixel SP4, but the embodiments of the present specification are not limited thereto. For example, the scan line SCANL can also provide different scan signals to the pixels P corresponding to one horizontal line. For example, different scan signals can be provided to the pixels P corresponding to the horizontal line corresponding to the pixel P shown in FIG. 4.

[0061] The first to fourth light-emitting regions EA1, EA2, EA3, and EA4 can all emit light of different colors. For example, the first light-emitting region EA1 can emit green light, the second light-emitting region EA2 can emit blue light, the third light-emitting region EA3 can emit white light, and the fourth light-emitting region EA4 can emit red light, but the embodiments of the present specification are not limited thereto. For example, the arrangement order and arrangement form of each sub-pixel SP1, SP2, SP3, and SP4 can be variously changed.

[0062] The transparent display panel 110 according to the embodiments of this specification can include a light-emitting region in which a plurality of light-emitting regions EA1, EA2, EA3, and EA4 included in each of the plurality of sub-pixels SP1, SP2, SP3, and SP4 are divided into a plurality. For example, each of the plurality of sub-pixels SP1, SP2, SP3, and SP4 can include a first divided electrode 121 and a second divided electrode 122 in which the first electrodes 120 (or anode electrodes) of the light-emitting elements are separated from each other. Each of the first divided electrode 121 and the second divided electrode 122 can correspond to a divided light-emitting region. For example, the first light-emitting region EA1 provided in the first sub-pixel SP1 can include a first divided light-emitting region EA11 and a second divided light-emitting region EA12 corresponding to the first divided electrode 121 and the second divided electrode 122 divided into two. The second light-emitting region EA2 provided in the second sub-pixel SP2 can include a first divided light-emitting region EA21 and a second divided light-emitting region EA22 corresponding to the first divided electrode 121 and the second divided electrode 122 divided into two. The third light-emitting region EA3 provided in the third sub-pixel SP3 can include a first divided light-emitting region EA31 and a second divided light-emitting region EA32 corresponding to the first divided electrode 121 and the second divided electrode 122 divided into two. The fourth light-emitting region EA4 provided in the fourth sub-pixel SP4 can include a first divided light-emitting region EA41 and a second divided light-emitting region EA42 corresponding to the first divided electrode 121 and the second divided electrode 122 divided into two.

[0063] The first divided electrode 121 and the second divided electrode 122 can be electrically connected to each other via a repair pattern RP. The repair pattern RP can serve to repair the darkening of any one of the first divided electrode 121 and the second divided electrode 122. For example, the repair pattern RP can electrically connect the first divided electrode 121 and the second divided electrode 122 to the circuit regions CA1, CA2, CA3, CA4 of the respective sub-pixels SP1, SP2, SP3, SP4. For example, the repair pattern RP can be configured in a "T" shape. One end of the repair pattern RP branches out on both sides and is electrically connected to each of the first divided electrode 121 and the second divided electrode 122, and the other end of the repair pattern RP can be electrically connected to the circuit regions CA1, CA2, CA3, CA4 of the respective sub-pixels SP1, SP2, SP3, SP4. When a foreign object occurs in either the first divided electrode 121 or the second divided electrode 122, the repair pattern RP can block the electrical connection between the divided electrode in which the foreign object has occurred and the circuit regions CA1, CA2, CA3, CA4, thereby darkening only the divided electrode in which the foreign object has occurred and playing a role in repairing the remaining divided electrodes so that they operate normally.

[0064] As shown in FIG. 2, each pixel circuit CA1, CA2, CA3, CA4 of the plurality of sub-pixels SP1, SP2, SP3, SP4 can include a capacitor Cst, at least one thin film transistor DRT, TR1, TR2, and a light emitting element ED. For example, at least one thin film transistor DRT, TR1, TR2 can include a driving transistor DTR, a first switching transistor TR1, and a second switching transistor TR2. Also, the light emitting element ED can include a first electrode (or anode electrode, pixel electrode), a light emitting layer (or organic light emitting layer), and a second electrode (or cathode electrode, common electrode).

[0065] The transparent display panel 110 according to the embodiments of the present specification can further include at least one trench line TCL extending in a first direction (or Y-axis direction) in the transmission region TA.

[0066] At least one trench line TCL can serve to isolate a light-emitting layer (or an organic light-emitting layer) formed in a transmissive region TA. At least one trench line TCL can be configured as part of at least one protective layer (e.g., a planarization layer and a passivation layer). For example, at least one trench line TCL can be formed by removing at least a part of at least one protective layer (e.g., a planarization layer and a passivation layer). A scan line SCANL (or a gate line) crossing the transmissive region TA can be disposed below at least one trench line TCL. A block pattern BP can further be included at a portion where at least one trench line TCL and the scan line SCANL intersect. For example, the block pattern BP can prevent the scan line SCANL intersecting below at least one trench line TCL from being damaged during the process of forming at least one trench line TCL.

[0067] At least one trench line TCL can be disposed adjacent to a common power supply line VSSL in the transmissive region TA. For example, at least one trench line TCL can isolate a light-emitting layer (or an organic light-emitting layer) extending from a pixel P corresponding to the common power supply line VSSL. For example, at least one trench line TCL can be formed by removing at least a part of at least one protective layer (e.g., a planarization layer and a passivation layer). For example, at least one protective layer can include an organic insulating layer, and at least one trench line TCL can be configured by removing at least a part of the organic insulating layer, thereby isolating the organic insulating layer. Thereby, moisture permeation from the outside of at least one trench line TCL toward the pixel P can be prevented. Thus, even if a certain region including the transmissive region TA outside at least one trench line TCL is cut with a cutting device such as a laser or a wheel, moisture permeation penetrating from the outside of at least one trench line TCL can be prevented.

[0068] The transparent display panel 110 according to an embodiment of the present specification may further include an auxiliary power contact portion AXC disposed in the transmissive region TA and in contact with the second electrode (or cathode electrode, common electrode) of the light-emitting element ED.

[0069] The auxiliary power contact portion AXC is connected to the common power line VSSL and can supply the second power source EVSS to the second electrode (or cathode electrode) of the light-emitting element ED. For example, the second power source EVSS may be a common power source commonly supplied to the sub-pixels SP1, SP2, SP3, and SP4.

[0070] The auxiliary power contact portion AXC is disposed in the transmissive region TA, electrically connected to an auxiliary power line AXL extending in a first direction (or X-axis direction) from the common power line VSSL, and may be disposed to overlap at least a part of at least one trench line TCL. For example, a part of the auxiliary power contact portion AXC can be exposed by at least one trench line TCL. The exposed portion of the auxiliary power contact portion AXC can be in direct contact with and electrically connected to the second electrode (or cathode electrode) of the light-emitting element ED.

[0071] FIG. 5 is a diagram showing the C region of FIG. 4 according to an embodiment of the present specification. FIG. 6 is a cross-sectional view taken along line I-I' of FIG. 5 according to an embodiment of the present specification. FIG. 7 is a cross-sectional view taken along line II-II' of FIG. 5 according to an embodiment of the present specification. FIG. 8 is a cross-sectional view taken along line III-III' of FIG. 5 according to an embodiment of the present specification.

[0072] Referring to FIGS. 5 to 8 together with FIG. 4, the transparent display panel 110 according to an embodiment of the present specification includes a plurality of trench lines TCL1 and TCL2 extending in a first direction (or Y-axis direction) in the transmissive region TA, an undercut line UCL extending side by side between the plurality of trench lines TCL1 and TCL2, and an auxiliary power contact portion AXC overlapping at least a part of the plurality of trench lines TCL1 and TCL2.

[0073] Specifically, at least one of the data line DL, pixel power supply line VDDL, common power supply line VSSL, and reference line REFL among the first signal lines can be arranged on the substrate 111. For example, as shown in FIGS. 6 and 7, the common power supply line VSSL can be arranged on the substrate 111. The common power supply line VSSL can extend in the first direction (or Y-axis direction) in the non-transmissive region NTA on the substrate 111. Also, on the substrate 111, the pixel power supply line VDDL can be arranged on the opposite side of the common power supply line VSSL with a plurality of sub-pixels SP1, SP2, SP3, and SP4 interposed therebetween. Further, on the substrate 111, a plurality of data lines DL1, DL2, DL3, DL4 and the reference line REFL can be arranged between the common power supply line VSSL and the pixel power supply line VDDL. Also, a light-shielding layer can be arranged on the substrate 111. For example, the light-shielding layer can serve to block external light incident on the active layer of the thin-film transistor. The light-shielding layer can be composed of a single layer or a multi-layer made of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or an alloy thereof. For example, the first signal line composed of the same material in the same layer as the light-shielding layer on the substrate 111 can be at least one of the data line DL, pixel power supply line VDDL, common power supply line VSSL, and reference line REFL, but the embodiments of this specification are not limited thereto.

[0074] A buffer layer BF can be arranged on the substrate 111 on which the common power supply line VSSL and the light-shielding layer are arranged. The buffer layer BF is for protecting the thin-film transistor from moisture that penetrates through the moisture-sensitive substrate 111, and is composed of a single layer or a multi-layer containing an inorganic insulating material such as silicon oxide (SiO X ), silicon nitride (SiN X ), or aluminum oxide (Al2O3).

[0075] At least one insulating layer, a thin film transistor, and at least one signal line can be disposed on the buffer layer BF. For example, as shown in FIG. 7, an auxiliary power line AXL can be disposed on the buffer layer BF.

[0076] The auxiliary power line AXL can be electrically connected to the common power line VSSL through a contact hole penetrating the buffer layer BF. The auxiliary power line AXL can be connected to the common power line VSSL and extend in the second direction (or X-axis direction) and be disposed in the transmission region TA. The auxiliary power line AXL can electrically connect between the common power line VSSL and the auxiliary power contact portion AXC. Also, on the buffer layer BF, at least one of the data line DL, the pixel power line VDDL, the common power line VSSL, and the reference line REFL among the first signal lines can be disposed, but the embodiments of this specification are not limited thereto. Also, the scan line SCANL (or gate line), which is the second signal line, can be disposed in the non-transmission region NTA and the transmission region TA on the buffer layer BF. For example, at least a part of the scan line SCANL can be disposed to extend in the second direction (or X-axis direction) across the transmission region TA. Also, a thin film transistor can be disposed on the buffer layer BF. For example, the thin film transistor can include an active layer disposed on the buffer layer BF, a gate insulating layer, a gate electrode, and a source / drain electrode. The gate insulating layer can be disposed between the active layer and the gate electrode. For example, the gate insulating layer can be formed only in the region where the gate electrode is disposed. An interlayer insulating layer ILD can be disposed between the gate electrode and the source / drain electrode of the thin film transistor.

[0077] The auxiliary power contact portion AXC can be composed of the same material on the same layer as the auxiliary power line AXL. For example, the auxiliary power contact portion AXC can be integrally formed with the auxiliary power line AXL. For example, the auxiliary power contact portion AXC can be formed by expanding the area of the auxiliary power line AXL at a portion overlapping with at least one trench line TCL. The auxiliary power contact portion AXC can be composed of a different material on a different layer from the auxiliary power line AXL. For example, at least one insulating layer can be disposed between the auxiliary power contact portion AXC and the auxiliary power line AXL, and the auxiliary power contact portion AXC and the auxiliary power line AXL can be electrically connected to each other via a contact hole penetrating through at least one insulating layer, but the embodiments of this specification are not limited thereto.

[0078] An interlayer insulating layer ILD can be disposed on the substrate 111 on which the auxiliary power line AXL and the auxiliary power contact portion AXC are disposed. For example, the interlayer insulating layer ILD can be disposed between the gate electrode and the source / drain electrode of the thin film transistor. The interlayer insulating layer ILD can be composed of a single layer or multiple layers including an inorganic insulating material such as silicon oxide (SiO X ), silicon nitride (SiN X ), or aluminum oxide (Al2O3). A source / drain electrode of the thin film transistor can be disposed on the interlayer insulating layer ILD. At least one of the data line DL, the pixel power line VDDL, the common power line VSSL, and the reference line REFL among the first signal lines can be disposed on the interlayer insulating layer ILD, but the embodiments of this specification are not limited thereto.

[0079] A first passivation layer PAS1 can be disposed on the interlayer insulating layer ILD. A second passivation layer PAS2 can be disposed on the first passivation layer PAS1. The first passivation layer PAS1 and the second passivation layer PAS2 are silicon oxide (SiO X ), silicon nitride (SiN X) It can be formed of a single layer or multiple layers including an inorganic insulating material such as aluminum oxide (Al2O3). On the first passivation layer PAS1, at least one of the data line DL, pixel power supply line VDDL, common power supply line VSSL, and reference line REFL among the first signal lines can be arranged, but the embodiments of this specification are not limited thereto.

[0080] On the second passivation layer PAS2, a planarization layer PLN for planarizing the steps caused by the thin film transistor and the plurality of signal lines can be arranged. The planarization layer PLN can be formed of an organic material such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0081] On the planarization layer PLN, a light emitting element ED composed of a first electrode 120, an organic light emitting layer 130, and a second electrode 140 and a bank layer BA can be arranged.

[0082] The first electrode 120 is arranged separately for each of the sub-pixels SP1, SP2, SP3, and SP4 and can be arranged in the non-transmissive region NTA. The first electrode 120 can be formed of a highly reflective metal material such as a laminated structure of aluminum and titanium (Ti / Al / Ti), a laminated structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, a laminated structure of an Ag alloy and ITO (ITO / Ag alloy / ITO), a MoTi alloy, and a laminated structure of a MoTi alloy and ITO (ITO / MoTi alloy / ITO). The Ag alloy can be an alloy such as silver (Ag), palladium (Pd), and copper (Cu). The MoTi alloy can be an alloy of molybdenum (Mo) and titanium (Ti). The first electrode 120 can be the anode electrode of the light emitting element ED. The organic light emitting layer 130 and the second electrode 140 can be arranged on the first electrode 120. The first electrode 120, the organic light emitting layer 130, and the second electrode 140 can constitute the light emitting element ED.

[0083] The bank layer BA can be disposed on the planarization layer PLN. The bank layer BA can be disposed between the first electrodes 120. For example, the bank layer BA can be configured to cover the respective edges of the first electrodes 120 and expose a part of each of the first electrodes 120. The bank layer BA can be composed of an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0084] The organic light-emitting layer 130 can be disposed on the first electrode 120. The organic light-emitting layer 130 can include a hole transporting layer, an emission material layer, and an electron transporting layer. For example, when a voltage is applied to the first electrode 120 and the second electrode 140, holes and electrons can move to the organic light-emitting layer 130 through the hole transporting layer and the electron transporting layer respectively, and combine with each other in the light-emitting layer to emit light. The organic light-emitting layer 130 can be separated or disconnected by a plurality of trench lines TCL and undercut lines UCL.

[0085] The second electrode 140 can be a common layer formed in common for the sub-pixels SP1, SP2, SP3, SP4 and to which the same voltage is applied. The second electrode 140 can be formed of a transparent conductive material (TCO, Transparent Conductive Material) such as ITO or IZO that can transmit light, or a semi-transmissive conductive material (SE1mi-transmissive Conductive Material) such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). When the second electrode 140 is formed of a semi-transmissive conductive material, the light extraction efficiency can be increased by a micro cavity. The second electrode 140 can be the cathode electrode of the light-emitting element ED.

[0086] A sealing layer EPAS can be disposed on the light-emitting element ED. The sealing layer EPAS can be configured to cover the second electrode 140 on the second electrode 140. The sealing layer EPAS can serve to prevent oxygen or moisture from penetrating into the organic light-emitting layer 130 and the second electrode 140. For example, the sealing layer EPAS can include at least one inorganic film and can further include at least one organic film, but the embodiments of the present specification are not limited thereto.

[0087] A transparent display panel 110 according to an embodiment of the present specification can form a plurality of trench lines TCL1, TCL2, and undercut lines UCL using a planarization layer PLN and at least one insulating layer (e.g., an interlayer insulating layer ILD, a first passivation layer PAS1, a second passivation layer PAS2). For example, the plurality of trench lines TCL1, TCL2 can be formed by removing at least a part of at least one insulating layer.

[0088] The plurality of trench lines TCL1, TCL2 can be arranged side by side in a first direction (or the Y-axis direction) and can be spaced apart from each other in a second direction (or the X-axis direction). The plurality of trench lines TCL1, TCL2 can be formed by removing at least one insulating layer on the buffer layer BF. The plurality of trench lines TCL1, TCL2 can be formed by removing the interlayer insulating layer ILD, the first passivation layer PAS1, and the second passivation layer PAS2.

[0089] An undercut line UCL can be disposed between a plurality of trench lines TCL1 and TCL2. The undercut line UCL can be formed by removing at least a part of the planarization layer PLN and at least one insulating layer. The undercut line UCL can include a support line UCL1 formed of at least one insulating layer, and an eaves line UCL2 disposed on the support line UCL1, protruding from the support line UCL1, and formed of the planarization layer PLN. The undercut line UCL can include an undercut region UCA together with the plurality of trench lines TCL1 and TCL2. For example, the undercut line UCL can have an undercut region UCA including the lower side of the edge of the eaves line UCL2 and the side surface of the support line UCL1. For example, the undercut region UCA can be included in the plurality of trench lines TCL. The undercut line UCL and the plurality of trench lines TCL can be disposed adjacent to a common power supply line VSSL. Also, the undercut line UCL and the plurality of trench lines TCL can be disposed so as not to overlap with the repair pattern RP.

[0090] As shown in FIG. 7, the undercut line UCL and the plurality of trench lines TCL can be disposed on a part of the auxiliary power supply contact portion AXC. The undercut line UCL and the plurality of trench lines TCL can be configured to expose a part of the auxiliary power supply contact portion AXC. For example, a part of the auxiliary power supply contact portion AXC can be exposed by at least one trench line TCL. The exposed portion of the auxiliary power supply contact portion AXC can be in direct contact with and electrically connected to the second electrode (or cathode electrode) of the light emitting element ED.

[0091] Below the undercut line UCL and the plurality of trench lines TCL, a scan line SCANL (or gate line) that crosses the transmission region TA can be arranged. A block pattern BP can be arranged at a portion where the undercut line UCL and the plurality of trench lines TCL intersect with the scan line SCANL. For example, the block pattern BP can be formed at a portion where the undercut line UCL and the plurality of trench lines TCL intersect with the scan line SCANL.

[0092] The block pattern BP is for preventing the scan line SCANL from being damaged by the etching solution used when the undercut line UCL and the plurality of trench lines TCL are formed. For example, the block pattern BP can be formed between the undercut line UCL and the scan line SCANL. The block pattern BP can be formed on the first passivation layer PAS1. For example, the block pattern BP can be formed of the same material as other signal lines formed on the first passivation layer PAS1. For example, the block pattern BP can be composed of the same material in the same layer as at least one of the data line DL, the pixel power supply line VDDL, the common power supply line VSSL, and the reference line REFL among the first signal lines. Alternatively, the block pattern BP can be composed of the same material in the same layer as at least one of the auxiliary power supply line AXL and the auxiliary power supply contact portion AXC, but the embodiments of the present specification are not limited thereto.

[0093] The undercut line UCL and the plurality of trench lines TCL are arranged adjacent to the common power supply line VSSL, and can cut off the light emitting layer (or organic light emitting layer) extending from the pixel P corresponding to the adjacent common power supply line VSSL. Further, the undercut line UCL is formed by removing at least a part of the planarization layer PLN which is an organic substance, so that the organic insulating layer can be cut off. Therefore, the undercut line UCL and the plurality of trench lines TCL can continuously cut off the organic light emitting layer and the organic insulating layer of the transparent display panel 110 in the first direction (or Y-axis direction), and prevent the moisture permeation from the permeation region TA and the bezel. Therefore, even if a certain region including the permeation region TA outside the undercut line UCL and the plurality of trench lines TCL is cut by a cutting device such as a laser or a wheel, the undercut line UCL and the plurality of trench lines TCL can prevent the moisture permeation from the outside.

[0094] According to an embodiment of the present specification, the transparent display panel 110 forms an undercut line UCL and a plurality of trench lines TCL that overlap with the auxiliary power contact portion AXC in the transmission region TA and extend in the first direction (or the Y-axis direction), so that the space of the auxiliary power contact structure and the transmission region TA can be shared. Therefore, the margin of the transmission region TA can be further secured, and thus the light transmittance of the transparent display panel 110 can be improved. Further, according to an embodiment of the present specification, the transparent display panel 110 can prevent moisture permeation penetrating from the transmission region TA or the bezel by the undercut line UCL and the plurality of trench lines TCL. Thereby, even if the outside of the boundary line by the undercut line UCL and the plurality of trench lines TCL is cut (or separated), it can become a cuttable region that can prevent moisture permeation toward the pixel P. Therefore, the transparent display panel 110 according to the embodiment of the present specification can constitute or realize a cuttable transparent display panel that can be divided into various sizes and manufactured according to the fields and applications to which the transparent display panel 110 is applied by providing a cuttable region by the undercut line UCL and the plurality of trench lines TCL in the transmission region TA.

[0095] FIG. 9 is a diagram showing the C region of FIG. 4 according to another embodiment of the present specification. FIG. 10 is a cross-sectional view taken along line IV-IV' of FIG. 9 according to another embodiment of the present specification. FIG. 11 is a cross-sectional view taken along line V-V' of FIG. 9 according to another embodiment of the present specification. FIG. 12 is another cross-sectional view taken along line V-V' of FIG. 9 according to another embodiment of the present specification. FIG. 13 is a cross-sectional view taken along line VI-VI' of FIG. 9 according to another embodiment of the present specification. FIGS. 9 to 13 are obtained by changing the configuration of the trench lines in the transparent display panel 110 described with reference to FIGS. 1 to 8. In the following description, the same reference numerals are given to the remaining same configurations except for the changed configurations, and the overlapping descriptions thereof are omitted or briefly described.

[0096] Referring to FIGS. 9 to 13, a transparent display panel 110 according to another embodiment of the present specification may include a trench line TCL extending in a first direction (or Y-axis direction) in a transmissive region TA and an auxiliary power contact portion AXC overlapping at least a part of the trench line TCL.

[0097] A common power supply line VSSL among the first signal lines may be arranged on the substrate 111. For example, at least one of a data line DL, a pixel power supply line VDDL, a common power supply line VSSL, and a reference line REFL, which are formed of the same material in the same layer as the light-shielding layer, may be arranged on the substrate 111, but the embodiments of the present specification are not limited thereto.

[0098] At least one insulating layer may be sequentially arranged on the substrate 111. For example, the at least one insulating layer may include a buffer layer BF, an interlayer insulating layer ILD, a first passivation layer PAS1, and a second passivation layer PAS2.

[0099] A planarization layer PLN for planarizing steps due to a thin film transistor and a plurality of signal lines may be arranged on the second passivation layer PAS2. A light-emitting element ED composed of a first electrode 120, an organic light-emitting layer 130, and a second electrode 140 and a bank layer BA may be arranged on the planarization layer PLN.

[0100] In the transparent display panel 110 according to another embodiment of the present specification, the organic light-emitting layer 130 and the second electrode 140 of the light-emitting element ED may be arranged to extend to the transmissive region TA. The organic light-emitting layer 130 arranged in the transmissive region TA may be separated or disconnected by at least one trench line TCL.

[0101] At least one trench line TCL can be formed by removing at least a part of the organic light-emitting layer 130 disposed in the transmissive region TA. For example, in the manufacturing process of the transparent display panel 110, after the formation of the organic light-emitting layer 130 is completed, a laser can be irradiated along the first direction (or Y-axis direction) on the transmissive region TA on the substrate 111, and the organic light-emitting layer 130 can be separated or disconnected in a line form by the irradiation of the laser, thereby forming at least one trench line TCL. For example, there may be no organic light-emitting layer 130 in at least one trench line TCL. For example, at least one trench line TCL can be formed by a laser drilling process, but the embodiments of the present specification are not limited thereto.

[0102] At least one trench line TCL can be configured to pass through the auxiliary power contact portion AXC. For example, the auxiliary power contact portion AXC can be disposed in the transmissive region TA. The auxiliary power contact portion AXC is composed of a plurality of parts, and the plurality of auxiliary power contact portions AXC can be arranged side by side in the first direction (or Y-axis direction). At least one trench line TCL can be formed by removing the organic light-emitting layer 130 along the first direction (or Y-axis direction) so as to overlap with the portion where the plurality of auxiliary power contact portions AXC are arranged side by side. At least one trench line TCL can expose a part of the auxiliary power contact portion AXC to the outside by removing the organic light-emitting layer 130 on the auxiliary power contact portion AXC.

[0103] In the manufacturing process of the transparent display panel 110, after the formation of at least one trench line TCL is completed, the second electrode 140 can be formed, and the second electrode 140 can be directly in contact with the auxiliary power contact portion AXC exposed by at least one trench line TCL.

[0104] As shown in FIG. 11, the auxiliary power supply contact portion AXC can be disposed in the first passivation layer PAS1. The auxiliary power supply contact portion AXC is connected to the common power supply line VSSL and can be connected to the auxiliary power supply line AXL extending in the second direction (or X-axis direction), or can be formed of the same material in the same layer. For example, the auxiliary power supply contact portion AXC can be integrally formed with the auxiliary power supply line AXL. The auxiliary power supply contact portion AXC, being integrated with or connected to the auxiliary power supply line AXL, can serve to apply the second power supply (or common voltage or low potential voltage) supplied from the common power supply line VSSL to the second electrode 140. The auxiliary power supply contact portion AXC can serve to reduce the resistance of the second electrode 140 by having at least a portion exposed to the at least one trench line TCL in direct contact with the second electrode 140.

[0105] As shown in FIG. 12, the auxiliary power supply contact portion AXC can be disposed in the second passivation layer PAS2. The auxiliary power supply contact portion AXC can be formed of a different material in a layer different from the auxiliary power supply line AXL. For example, the auxiliary power supply contact portion AXC can be formed of the same material as the first electrode 120. The auxiliary power supply contact portion AXC can be electrically connected to the auxiliary power supply line AXL through a contact hole penetrating the second passivation layer PAS2 located therebetween. The auxiliary power supply contact portion AXC, being integrated with or connected to the auxiliary power supply line AXL, can serve to apply the second power supply (or common voltage or low potential voltage) supplied from the common power supply line VSSL to the second electrode 140. The auxiliary power supply contact portion AXC can serve to reduce the resistance of the second electrode 140 by having at least a portion exposed to the at least one trench line TCL in direct contact with the second electrode 140.

[0106] A block pattern BP can be arranged at a portion where at least one trench line TCL and a scan line SCANL intersect. For example, as shown in FIG. 13, the block pattern BP can be arranged in the first passivation layer PAS1. The block pattern BP is for preventing the scan line SCANL from being damaged by a laser when at least one trench line TCL is formed. For example, the block pattern BP can be arranged between the trench line TCL and the scan line SCANL. For example, the block pattern BP can be composed of the same material in the same layer as at least one of an auxiliary power line AXL and an auxiliary power contact portion AXC formed on the first passivation layer PAS1. For example, the block pattern BP can be composed of the same material in the same layer as at least one of a data line DL, a pixel power line VDDL, a common power line VSSL, and a reference line REFL among the first signal lines, but the embodiments of the present specification are not limited thereto.

[0107] According to other embodiments of the present specification, the block pattern BP can also be omitted. A plurality of insulating layers can be arranged between at least one trench line TCL and the scan line SCANL. For example, an interlayer insulating layer ILD, a first passivation layer PAS1, and a second passivation layer PAS2 can be arranged between at least one trench line TCL and the scan line SCANL. Therefore, since at least one trench line TCL does not damage the scan line SCANL during the formation process by laser irradiation, the block pattern BP can be omitted.

[0108] According to other embodiments of the present specification, at least one trench line TCL can be formed by removing at least a part of the organic light-emitting layer 130 and the second electrode 140 disposed in the transmissive region TA. For example, in the manufacturing process of the transparent display panel 110, after the formation of the organic light-emitting layer 130 and the second electrode 140 is completed, a laser is irradiated along the first direction (or the Y-axis direction) on the transmissive region TA on the substrate 111, and the organic light-emitting layer 130 and the second electrode 140 are separated or disconnected in a line shape by the irradiation of the laser, thereby forming at least one trench line TCL. For example, the organic light-emitting layer 130 and the second electrode 140 may not exist in at least one trench line TCL. For example, at least one trench line TCL can be formed in a laser drilling process, but the embodiments of the present specification are not limited thereto.

[0109] According to other embodiments of the present specification, at least one trench line TCL can include a plurality of trench lines TCL arranged side by side in the first direction (or the Y-axis direction) in the transmissive region TA and spaced apart from each other in the second direction (or the X-axis direction). By arranging the plurality of trench lines TCL in multiple layers in the transmissive region TA, moisture permeation from the outside can be more effectively prevented.

[0110] According to other embodiments of the present specification, the transparent display panel 110 forms a trench line TCL that extends in the first direction (or the Y-axis direction) overlapping with the auxiliary power contact portion AXC within the transmissive region TA, thereby sharing the space of the auxiliary power contact structure and the transmissive region TA while minimizing the removal area of the organic light-emitting layer 130. Thus, a larger margin of the transmissive region TA can be secured, and therefore the light transmittance of the transparent display panel 110 can be further improved. Also, according to other embodiments of the present specification, the transparent display panel 110 can prevent moisture permeation penetrating from the transmissive region TA or the bezel by at least one trench line TCL. Thus, even if the outside of the boundary line by at least one trench line TCL is cut (or separated), it can become a cuttable region that can prevent moisture permeation toward the pixel P. Therefore, the transparent display panel 110 according to the embodiments of the present specification can constitute or realize a cuttable transparent display panel that can be divided into various sizes and manufactured according to the fields and applications to which the transparent display panel 110 is applied, by providing a cuttable region by at least one trench line TCL in the transmissive region TA.

[0111] FIG. 14 is a diagram showing a transparent display device according to other embodiments of the present specification.

[0112] Referring to FIG. 14, the transparent display panel 110 according to other embodiments of the present specification can include a display region DA in which pixels are configured to display an image, and a non-display region NDA in which no image is displayed.

[0113] The transparent display panel 110 according to other embodiments of the present specification can include at least one trench line TCL that extends from the non-display region NDA to the display region DA in the first direction (or the Y-axis direction). The at least one trench line TCL can intersect and overlap with a short-circuit bar of a pixel power supply or a common power supply disposed in the non-display region NDA, and can be disposed so as to also overlap with the auxiliary power contact portion AXC disposed in the transmissive region TA in the display region DA.

[0114] The transparent display panel 110 can include dam patterns DAM1 and DAM2 that divide the display area DA into at least two or more parts. The dam patterns DAM1 and DAM2 can be configured in a closed-loop shape that surrounds at least a part of the non-display area NDA (or bezel area) and the display area DA so as to divide the display area DA into at least two or more parts. For example, the dam patterns DAM1 and DAM2 can include a first dam pattern DAM1 and a second dam pattern DAM2.

[0115] The first dam pattern DAM1 can be configured to surround the display area DA located on the left side in the second direction (or X-axis direction). The second dam pattern DAM2 can be configured to surround the display area DA located on the right side in the second direction (or X-axis direction).

[0116] The first dam pattern DAM1 and the second dam pattern DAM2 can be arranged to be spaced apart from each other in the second direction (or X-axis direction). Alternatively, the first dam pattern DAM1 and the second dam pattern DAM2 can be arranged such that at least a part of the adjacent portions overlap each other.

[0117] The transparent display panel 110 can include a plurality of gate driving units 205a and 205b. For example, the plurality of gate driving units 205a and 205b can include a first gate driving unit 205a and a second gate driving unit 205b. The first gate driving unit 205a can be arranged in the non-display area NDA located on the left side in the second direction (or X-axis direction), and the second gate driving unit 205b can be arranged in the non-display area NDA located on the right side in the second direction (or X-axis direction). For example, the first dam pattern DAM1 can be arranged to surround the first gate driving unit 205a and a part of the left side of the display area DA, and the second dam pattern DAM2 can be arranged to surround the second gate driving unit 205b and a part of the right side of the display area DA.

[0118] The transparent display panel 110 can include a first and a second source drive integrated circuit (hereinafter referred to as "IC") 210a, 210b, a first and a second flexible film 220a, 220b, a first and a second circuit board 230a, 230b, and a first and a second timing control unit 240a, 240b.

[0119] The first source drive IC 210a, the first flexible film 220a, the first circuit board 230a, and the first timing control unit 240a can be connected to the left display area DA defined by the first dam pattern DAM1, and the second source drive IC 210b, the second flexible film 220b, the second circuit board 230b, and the second timing control unit 240b can be connected to the left display area DA defined by the second dam pattern DAM2.

[0120] A cutting part CP can be provided between the first dam pattern DAM1 and the second dam pattern DAM2. The cutting part CP is a part where the transparent display panel 110 can be separated or cut by a cutting device such as a laser or a wheel. For example, the display area DA surrounded by the first and second dam patterns DAM1, DAM2 can become the display areas DA of the mutually independent transparent display panels 110a, 110b by being separated or cut by the cutting part CP.

[0121] The first and second dam patterns DAM1, DAM2 can become the non-display areas NDA (or bezel areas) of the respective separated transparent display panels 110a, 110b. For example, the center part of the display area DA that the first and second dam patterns DAM1, DAM2 cross in the first direction (or Y-axis direction) was the display area DA before cutting, but can become the non-display area NDA (or bezel area) after cutting.

[0122] FIG. 15 is a view showing the D region of FIG. 14 according to another embodiment of the present specification. FIG. 16 is a cross-sectional view of FIG. 15 taken along line VII-VII'. FIG. 17 is another cross-sectional view of FIG. 15 taken along line VII-VII'.

[0123] Referring to FIGS. 15 to 17 together with FIG. 14, the transparent display panel 110 can include a plurality of transmissive regions TA arranged side by side in the first direction (or the Y-axis direction) within the display region DA and spaced apart from each other in the second direction (or the X-axis direction). At least one trench line TCL extending in the first direction (or the Y-axis direction) can be arranged in each of the plurality of transmissive regions TA.

[0124] A cuttable region CPA can be formed between the first dam pattern DAM1 and the second dam pattern DAM2. The cuttable region CPA can be a region in which moisture permeability reliability can be ensured by the first and second dam patterns DAM1, DAM2 and at least one trench line TCL even when the transparent display panel 110 is cut.

[0125] At least one trench line TCL can be arranged over the entire area of the transparent display panel 110. At least one trench line TCL can be arranged to overlap with the first and second dam patterns DAM1, DAM2.

[0126] Referring to FIG. 16, a transparent display panel 110 according to another embodiment of the present specification may include a light-shielding layer LS disposed on a first substrate 111, a plurality of data lines DL1, DL2, DL3, DL4, a reference line REFL, a pixel power line VDDL, a common power line VSSL, a buffer layer BF, an active layer ACT of a thin-film transistor, a gate insulating film GI, a gate electrode GE, a first source / drain electrode SDE1, and a second source / drain electrode SED2, an interlayer insulating layer ILD, a first passivation layer PAS1, a second passivation layer PAS2, a planarization layer PLN, a light-emitting element ED, and a bank layer BA. Further, it may include color filters CF1, CF2 and a black matrix BM disposed on a second substrate 112 disposed to face the first substrate 111. The first substrate 111 and the second substrate 112 can be joined to each other via a connecting member Fill.

[0127] A transparent display panel 110 according to another embodiment of the present specification may include at least one trench line TCL formed by removing an organic light-emitting layer 130 disposed on the second passivation layer PAS2 in a transmission region TA.

[0128] At least one trench line TCL may be disposed between the first dam pattern DAM1 and the light-emitting element ED. By disposing at least one trench line TCL between the first dam pattern DAM1 and the light-emitting element ED, it is possible to prevent moisture permeation that may penetrate through the first dam pattern DAM1. As a result, even when a cutting region CPA between the first dam pattern DAM1 and the second dam pattern DAM2 of the transparent display panel 110 according to another embodiment of the present specification is cut by a cutting device such as a laser or a wheel, at least one trench line TCL can prevent the permeating moisture, so that a cuttable transparent display panel that can be manufactured in various sizes according to the fields and applications to which the transparent display panel 110 is applied can be configured or realized.

[0129] Referring to FIG. 17, the transparent display panel 110 according to another embodiment of the present specification may further include a plurality of upper protective films 115 covering the color filters CF1 and CF2 of the second substrate 112.

[0130] The plurality of upper protective films 115 may be arranged spaced apart from each other with the transmission region TA of the display region DA interposed therebetween. The plurality of upper protective films 115 may be configured to cover the color filter CF. For example, the plurality of upper protective films 115 may be configured to cover the plurality of color filters CF1 and CF2. Also, the plurality of upper protective films 115 may be configured to cover the plurality of color filters CF1 and CF2 and the black matrix BM. For example, the plurality of upper protective films 115 may be made of a glass material.

[0131] In the transparent display panel 110 according to another embodiment of the present specification, the upper protective films 115 on the second substrate 112 are arranged spaced apart from each other together with at least one trench line TCL that separates or cuts off the organic light-emitting layer 130 on the first substrate 111, so that the moisture permeation path through the second substrate 112 can be blocked.

[0132] FIG. 18 is a view showing the D region of FIG. 14 according to another embodiment of the present specification. FIG. 19 is another cross-sectional view of FIG. 18 taken along line VIII-VIII'.

[0133] Referring to FIGS. 18 and 19, the transparent display panel 110 according to another embodiment of the present specification may include a plurality of transmission regions TA arranged side by side in the first direction (or Y-axis direction) and spaced apart from each other in the second direction (or X-axis direction) within the display region DA. At least one trench line TCL extending in the first direction (or Y-axis direction) may be arranged in each of the plurality of transmission regions TA.

[0134] A cuttable region CPA can be configured between the first dam pattern DAM1 and the second dam pattern DAM2. The cuttable region CPA can be a region where the moisture permeability reliability can be ensured by the first and second dam patterns DAM1, DAM2 and the plurality of trench lines TCL even if the transparent display panel 110 is cut.

[0135] At least one trench line TCL can include a plurality of trench lines TCL within a single transmission region TA. For example, at least one trench line TCL can include a plurality of trench lines TCL spaced apart from each other in the second direction (or X-axis direction) within the transmission region TA. For example, the plurality of trench lines TCL can be arranged side by side in the first direction (or Y-axis direction) and spaced apart from each other in the second direction (or X-axis direction). By arranging the plurality of trench lines TCL multiply within the transmission region TA, moisture permeation from the outside can be more effectively prevented.

[0136] The plurality of trench lines TCL can be arranged over the entire area of the transparent display panel 110. The plurality of trench lines TCL can be arranged to overlap with the first and second dam patterns DAM1, DAM2. The plurality of trench lines TCL can be arranged side by side with the first and second dam patterns DAM1, DAM2. For example, the plurality of trench lines TCL can be arranged side by side adjacent to the first and second dam patterns DAM1, DAM2.

[0137] Referring to FIG. 19, a transparent display panel 110 according to another embodiment of the present specification may include a plurality of trench lines TCL formed by removing an organic light-emitting layer 130 disposed on a second passivation layer PAS2 in a transmissive region TA. The plurality of trench lines TCL may be disposed between a first dam pattern DAM1 and a light-emitting element ED. By arranging the plurality of trench lines TCL multiple times between the first dam pattern DAM1 and the light-emitting element ED, it is possible to further prevent moisture permeation that may penetrate through the first dam pattern DAM1. Accordingly, even when a cutting region CPA between the first dam pattern DAM1 and the second dam pattern DAM2 of the transparent display panel 110 according to another embodiment of the present specification is cut by a cutting device such as a laser or a wheel, at least one trench line TCL can prevent the permeating moisture, so that a cuttable transparent display panel that can be manufactured in various sizes according to the fields and applications to which the transparent display panel 110 is applied can be configured or realized.

[0138] FIG. 20 is a view showing a D region of FIG. 14 according to another embodiment of the present specification. FIG. 21 is a schematic cross-sectional view taken along line IX-IX' of FIG. 20 according to another embodiment of the present specification.

[0139] Referring to FIGS. 20 and 21, in a transparent display panel 110 according to another embodiment of the present specification, only a connecting member Fill may be disposed between a first substrate 111 and a second substrate 112, and the arrangement of the dam pattern may be omitted.

[0140] At least one trench line TCL can prevent moisture permeation that penetrates from an outer contour portion cut by a cutting portion CP.

[0141] According to other embodiments of this specification, the transparent display panel 110 may further include a side sealing member 310 disposed at the outer edge portions of the first substrate 111 and the second substrate 112. The side sealing member 310 can play a role in compensating for the moisture permeability reliability due to the omission of the dam pattern. According to other embodiments of this specification, even if the dam pattern is omitted, the transparent display panel 110 can prevent moisture permeation from the outer contour by at least one trench line TCL and the side sealing member 310. Thereby, according to other embodiments of this specification, even if any region of the transparent display panel 110 is cut by a cutting device such as a laser or a wheel, the at least one trench line TCL and the side sealing member 310 can prevent the permeating moisture, so that a cuttable transparent display panel that can be manufactured in various sizes according to the fields and applications to which the transparent display panel 110 is applied can be configured or realized.

[0142] FIG. 22 is a diagram showing the D region of FIG. 14 according to other embodiments of this specification.

[0143] Referring to FIG. 22, the transparent display panel 110 according to other embodiments of this specification may include at least one trench line TCL and at least one trench pattern TCP. The transparent display panel 110 may include a plurality of transmission regions TA arranged side by side in a first direction (or the Y-axis direction) within the display region DA and spaced apart from each other in a second direction (or the X-axis direction).

[0144] At least one trench line TCL may be disposed in at least a part of the plurality of transmission regions TA. For example, at least one trench line TCL may be disposed in a transmission region TA that overlaps or is adjacent to the dam pattern DAM1 among the plurality of transmission regions TA. For example, at least one trench line TCL can be formed by a laser drilling process, but the embodiments of this specification are not limited thereto.

[0145] At least one trench pattern TCP can be arranged in at least some other parts of the plurality of transmission regions TA. At least one trench pattern TCP can be arranged to overlap with the auxiliary power contact portion AXC in the transmission region TA. For example, at least one trench pattern TCP can be arranged in a transmission region TA that is not adjacent to the dam pattern DAM1 among the plurality of transmission regions TA. For example, at least one trench pattern TCP can be formed by a laser sputtering patterning process, but the embodiments of this specification are not limited thereto.

[0146] The transparent display panel 110 according to other embodiments of this specification can arrange at least one trench line TCL at a position overlapping or adjacent to the dam pattern DAM1, and at least one trench pattern TCP at other positions. Thereby, the transparent display panel 110 according to other embodiments of this specification can provide an auxiliary power contact structure by at least one trench pattern TCP in a region not adjacent to the dam pattern DAM. Even if the cutting region CPA adjacent to the dam pattern DAM is cut by a cutting device such as a laser or a wheel, at least one trench line TCL can prevent permeating moisture, so that a cuttable transparent display panel that can be manufactured by being divided into various sizes according to the fields and applications to which the transparent display panel 110 is applied can be configured or realized.

[0147] The transparent display device according to one or more embodiments of this specification can be described as follows.

[0148] The transparent display device according to one or more embodiments of the present specification includes a substrate, a transmissive region, a non-transmissive region including a light-emitting region where light-emitting elements are arranged, at least one power line arranged on the substrate in the non-transmissive region and extending in a first direction, at least one trench line arranged on the substrate in the transmissive region and extending in the first direction, and an auxiliary power contact portion arranged on the substrate in the transmissive region, electrically connected to an auxiliary power line extending in a second direction intersecting the first direction from at least one power line, and overlapping at least a part of at least one trench line.

[0149] According to one or more embodiments of the present specification, at least one trench line can expose a part of the auxiliary power contact portion.

[0150] According to one or more embodiments of the present specification, the auxiliary power contact portion can be formed of the same material in the same layer as the auxiliary power line.

[0151] According to one or more embodiments of the present specification, the auxiliary power contact portion can be integrally formed with the auxiliary power line.

[0152] According to one or more embodiments of the present specification, the auxiliary power contact portion can be formed of a different material in a different layer from the auxiliary power line.

[0153] According to one or more embodiments of the present specification, at least one insulating layer is arranged between the auxiliary power contact portion and the auxiliary power line, and the auxiliary power contact portion can be connected to the auxiliary power line through a contact hole penetrating at least one insulating layer.

[0154] According to one or more embodiments of the present specification, at least one trench line can be configured to separate or disconnect the organic light-emitting layer constituting the light-emitting element.

[0155] According to one or more embodiments of the present specification, at least one power line includes a pixel power line and a common power line, and at least one trench line can be disposed adjacent to the common power line.

[0156] According to one or more embodiments of the present specification, a part of the transmission region located outside at least one trench line can be composed of a cuttable region.

[0157] According to one or more embodiments of the present specification, a light-emitting element includes a first electrode including a first divided electrode and a second divided electrode that are separated from each other, and further includes a repair pattern electrically connected to the first divided electrode and the second divided electrode, and at least one trench line may not overlap with the repair pattern.

[0158] According to one or more embodiments of the present specification, it includes a planarization layer disposed on a substrate and at least one insulating layer disposed between the substrate and the planarization layer, and at least one trench line can be formed by removing at least a part of at least one insulating layer.

[0159] According to one or more embodiments of the present specification, at least one trench line can include a plurality of trench lines arranged side by side and separated from each other.

[0160] According to one or more embodiments of the present specification, it can include an undercut line disposed between a plurality of trench lines and composed of a part of the planarization layer and at least one insulating layer.

[0161] According to one or more embodiments of the present specification, the undercut line can include a support line composed of at least a part of at least one insulating layer, and an eaves line disposed on the support line, protruding from the support line, and composed of the planarization layer. The undercut line can include an undercut region including the lower side of the edge of the eaves line and the side surface of the support line.

[0162] According to one or more embodiments of the present specification, an undercut line is disposed on a part of an auxiliary power contact portion, and an undercut region of the undercut line can expose a part of the auxiliary power contact portion.

[0163] According to one or more embodiments of the present specification, a light-emitting element includes a first electrode, an organic light-emitting layer, and a second electrode, and the organic light-emitting layer can be separated or disconnected by an undercut line.

[0164] According to one or more embodiments of the present specification, the second electrode can be in direct contact with the auxiliary power contact portion by an undercut line.

[0165] According to one or more embodiments of the present specification, it further includes a gate line extending in a second direction on a substrate, and can further include a block pattern disposed at a portion where the gate line and the undercut line intersect.

[0166] According to one or more embodiments of the present specification, the block pattern can be disposed between the undercut line and the gate line.

[0167] According to one or more embodiments of the present specification, the block pattern can be composed of the same material in the same layer as at least one of the auxiliary power line and the auxiliary power contact portion.

[0168] According to one or more embodiments of the present specification, a light-emitting element includes a first electrode, an organic light-emitting layer, and a second electrode, and the organic light-emitting layer and the second electrode extend to a transmission region on the substrate, and the organic light-emitting layer can be separated or disconnected by at least one trench line in the transmission region.

[0169] According to one or more embodiments of the present specification, at least one trench line can be formed by removing at least a part of the organic light-emitting layer.

[0170] According to one or more embodiments of the present specification, the organic light-emitting layer and the second electrode can be separated or disconnected by at least one trench line in the transmission region.

[0171] According to one or more embodiments of the present specification, at least one trench line can be formed by removing at least a part of the organic light-emitting layer and the second electrode.

[0172] According to one or more embodiments of the present specification, at least one trench line can be formed by a laser drilling process.

[0173] According to one or more embodiments of the present specification, the second electrode can be in direct contact with the auxiliary power contact portion by at least one trench line.

[0174] According to one or more embodiments of the present specification, at least one trench line can include at least two or more trench lines arranged side by side and separated from each other in the transmission region on the substrate.

[0175] According to one or more embodiments of the present specification, the auxiliary power contact portion can be made of the same material in a layer different from the first electrode.

[0176] According to one or more embodiments of the present specification, it further includes a display region and a non-display region around the display region, and further includes at least one power short-circuit bar extending in a second direction in the non-display region, and at least one trench line can intersect and overlap with at least one power short-circuit bar.

[0177] According to one or more embodiments of the present specification, it can further include a counter substrate arranged to face the substrate, a color filter arranged corresponding to the light-emitting region, and a connecting member connecting between the substrate and the counter substrate.

[0178] According to one or more embodiments of the present specification, it may further include a display area and a non-display area around the display area, be disposed between a substrate and a counter substrate, and further include a dam pattern disposed in the non-display area.

[0179] According to one or more embodiments of the present specification, the dam pattern can be composed of a closed loop surrounding the non-display area on the substrate.

[0180] According to one or more embodiments of the present specification, at least a part of the dam pattern can be arranged side by side in at least one trench line.

[0181] According to one or more embodiments of the present specification, at least one trench line can be arranged to overlap with the dam pattern.

[0182] According to one or more embodiments of the present specification, at least one trench line can be arranged side by side adjacent to the dam pattern.

[0183] According to one or more embodiments of the present specification, at least one trench line can include the dam pattern and at least two or more trench lines arranged side by side around the dam pattern.

[0184] According to one or more embodiments of the present specification, it can further include a side sealing member configured to cover the edges of the substrate and the counter substrate.

[0185] According to one or more embodiments of the present specification, the counter substrate can further include a plurality of upper protective films covering the color filter, and the upper protective films can be spaced apart from each other with a transmission region therebetween.

[0186] The embodiments of this specification have been described in more detail based on the accompanying drawings above. However, this specification is not necessarily limited to such embodiments, and various modifications can be made without departing from the technical idea of this specification. Therefore, the embodiments disclosed in this specification are for the purpose of explanation rather than for limiting the technical idea of this specification, and the scope of the technical idea of this specification is not limited by such embodiments. Therefore, it must be understood that the embodiments described above are exemplary in all aspects and not restrictive. The protection scope of this specification must be interpreted according to the scope of the claims, and all technical ideas within the equivalent scope shall be construed as being included in the scope of rights of this specification.

Explanation of Reference Numerals

[0187] 110 Display panel 205 Scan driving unit DA Display area NDA Non-display area SL1 First signal line SL2 Second signal line

Claims

1. A substrate, a transmissive region, a non - transmissive region including a light - emitting region where a light - emitting element is disposed, at least one power line disposed on the substrate in the non - transmissive region and extending in a first direction, at least one trench line disposed on the substrate in the transmissive region and extending in the first direction, a transparent display device including an auxiliary power - supply contact portion disposed on the substrate in the transmissive region, electrically connected to an auxiliary power - supply line extending from the at least one power line in a second direction intersecting the first direction, and overlapping at least a part of the at least one trench line.

2. The transparent display device according to claim 1, wherein the at least one trench line exposes a part of the auxiliary power - supply contact portion.

3. The transparent display device according to claim 1, wherein the auxiliary power - supply contact portion is made of the same material in the same layer as the auxiliary power - supply line.

4. The transparent display device according to claim 3, wherein the auxiliary power - supply contact portion is integrally formed with the auxiliary power - supply line.

5. The transparent display device according to claim 1, wherein the auxiliary power - supply contact portion is made of a different material in a different layer from the auxiliary power - supply line.

6. At least one insulating layer is disposed between the auxiliary power - supply contact portion and the auxiliary power - supply line, The transparent display device according to claim 5, wherein the auxiliary power - supply contact portion is connected to the auxiliary power - supply line through a contact hole penetrating the at least one insulating layer.

7. The transparent display device according to claim 1, wherein the at least one trench line is configured to separate or disconnect an organic light - emitting layer constituting the light - emitting element.

8. The at least one power line includes a pixel power line and a common power line, The transparent display device according to claim 1, wherein the at least one trench line is disposed adjacent to the common power line.

9. A part of the transmissive region located outside the at least one trench line is formed of a cut - able region, the transparent display device according to claim 1.

10. The light - emitting element includes a first electrode including a first divided electrode and a second divided electrode separated from each other, and further includes a repair pattern electrically connected to the first divided electrode and the second divided electrode. The transparent display device according to claim 1, wherein the at least one trench line does not overlap with the repair pattern.

11. A planarization layer disposed on the substrate, and at least one insulating layer disposed between the substrate and the planarization layer, and the transparent display device according to claim 1, wherein the at least one trench line is formed by removing at least a part of the at least one insulating layer.

12. The transparent display device according to claim 11, wherein the at least one trench line includes a plurality of trench lines arranged side by side and spaced apart from each other.

13. The transparent display device according to claim 12, further including an undercut line disposed between the plurality of trench lines and formed of a part of the planarization layer and the at least one insulating layer.

14. The undercut line includes a support line formed of at least a part of the at least one insulating layer, and an eaves line disposed on the support line, protruding from the support line, and formed of the planarization layer, and the transparent display device according to claim 13, further including an undercut region including a lower side of an edge of the eaves line and a side surface of the support line.

15. The undercut line is disposed on a part of the auxiliary power contact portion, and the undercut region of the undercut line exposes a part of the auxiliary power contact portion, according to the transparent display device of claim 14.

16. The light-emitting element includes a first electrode, an organic light-emitting layer, and a second electrode, and the organic light-emitting layer is separated or disconnected by the undercut line, according to the transparent display device of claim 13.

17. The second electrode directly contacts the auxiliary power contact portion by the undercut line, according to the transparent display device of claim 16.

18. further including a gate line extending in the second direction on the substrate, and further including a block pattern disposed at a portion where the gate line and the undercut line intersect, according to the transparent display device of claim 16.

19. The block pattern is disposed between the undercut line and the gate line, according to the transparent display device of claim 18.

20. The transparent display device according to claim 19, wherein the block pattern is made of the same material as at least one of the auxiliary power line and the auxiliary power contact portion and is formed on the same layer as the at least one of the auxiliary power line and the auxiliary power contact portion.

21. The light-emitting element includes a first electrode, an organic light-emitting layer, and a second electrode. The organic light-emitting layer and the second electrode extend to the transmission region on the substrate. The transparent display device according to claim 1, wherein the organic light-emitting layer is separated or disconnected by the at least one trench line in the transmission region.

22. The transparent display device according to claim 21, wherein the at least one trench line is formed by removing at least a part of the organic light-emitting layer.

23. The transparent display device according to claim 21, wherein the organic light-emitting layer and the second electrode are separated or disconnected by the at least one trench line in the transmission region.

24. The transparent display device according to claim 23, wherein the at least one trench line is formed by removing at least a part of the organic light-emitting layer and the second electrode.

25. The transparent display device according to claim 22, wherein the at least one trench line is formed by a laser drilling process.

26. The transparent display device according to claim 21, wherein the second electrode is in direct contact with the auxiliary power contact portion by the at least one trench line.

27. The transparent display device according to claim 21, wherein the at least one trench line includes at least two or more trench lines arranged side by side and spaced apart from each other in the transmission region on the substrate.

28. The transparent display device according to claim 21, wherein the auxiliary power contact portion is made of the same material as a layer different from the first electrode.

29. The transparent display device further includes a display region and a non-display region around the display region. The transparent display device further includes at least one power short-circuit bar extending in the second direction in the non-display region. The transparent display device according to claim 21, wherein the at least one trench line intersects and overlaps with the at least one power short-circuit bar.

30. A counter substrate arranged to face the substrate, A color filter arranged corresponding to the light-emitting region, The transparent display device according to claim 1, further including a connecting member connecting between the substrate and the counter substrate.

31. The transparent display device further includes a display region and a non-display region around the display region. The transparent display device according to claim 30, further comprising a dam pattern disposed between the substrate and the counter substrate and disposed in the non-display area.

32. The transparent display device according to claim 31, wherein the dam pattern is formed of a closed loop surrounding the non-display area on the substrate.

33. The transparent display device according to claim 31, wherein at least a part of the dam pattern is disposed side by side in the at least one trench line.

34. The transparent display device according to claim 33, wherein the at least one trench line is disposed so as to overlap with the dam pattern.

35. The transparent display device according to claim 33, wherein the at least one trench line is disposed adjacent to and side by side with the dam pattern.

36. The transparent display device according to claim 33, wherein the at least one trench line includes the dam pattern and at least two or more trench lines arranged side by side around the dam pattern.

37. The transparent display device according to claim 30, further comprising a side sealing member configured to cover edges of the substrate and the counter substrate.

38. The counter substrate further includes a plurality of upper protective films covering the color filter, The transparent display device according to claim 30, wherein the upper protective films are spaced apart from each other with the transmission region therebetween.

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