Transparent display device

Abstract

This transparent display device comprises: a transparent substrate having a pad area and a display area including a plurality of pixels; a plurality of terminals disposed on the pad area and electrically connected to a flexible printed circuit board; a plurality of light-emitting elements in the plurality of pixels; a plurality of conductive lines disposed on the display area and electrically connecting the plurality of terminals and the plurality of light-emitting elements; a plurality of connection pads electrically connecting the plurality of terminals and the plurality of conductive lines; a stopper positioned between the pad area and the display area; and a molding layer on the display area. The stopper may prevent molding liquid for forming the molding layer, from flowing to the pad area.

Description

transparent display device

[0001] The embodiment relates to a transparent display device.

[0002] Various display devices that implement images are being developed. Examples include LCD (liquid crystal display) display devices, inorganic light-emitting diode display devices, and OLED (organic light-emitting diode) display devices.

[0003] Meanwhile, transparent display devices that can display images without obstructing the view by allowing light to pass through from the front and back are gaining attention.

[0004] Transparent display devices can be used in a variety of applications, including show windows, refrigerator doors, billboards, and public displays. Specifically, they provide visual information in spaces that are transparent from the inside to the outside and vice versa, such as building windows. This is called a "see-through screen." Transparent display devices create new value in the digital signage display field, enabling people to communicate and experience in a transparent space.

[0005] As illustrated in Fig. 1a, in a transparent display device, a transparent substrate (11) is divided into a pad area (PR) and a display area (DR). A plurality of pixels for displaying an image are arranged in the display area (DR), and a flexible printed circuit board (FPC) connected to a driving board for supplying signals or voltages to the plurality of pixels is mounted in the pad area (PR).

[0006] A molding layer (13) is formed on a plurality of pixels on the display area (DR) through a molding process using a molding material. As illustrated in Fig. 1b, the molding liquid including the molding material does not remain only on the display area (DR) but overflows into the pad area (PR), thereby forming a molding layer (13) on the pad area (PR) as well.

[0007] In this case, there is a problem that the process becomes complicated because a process of removing the molding layer (13) on the pad area (PR) must be added so that the FPC can be mounted on the pad area (PR).

[0008] In addition, as shown in Fig. 2, if the molding layer (13) on the pad area (PR) is not completely removed and remains, there is a problem that poor electrical connection occurs between the FPC and the pad area (PR), resulting in a deterioration in image display quality.

[0009] To solve this problem, a process as illustrated in Fig. 3 was performed. As illustrated in Fig. 3a, after a tape (15) is attached on a pad area (PR), a molding process is performed so that a molding layer (13) is formed on the pad area (PR) and the display area (DR) on the transparent substrate (11). Drawing reference numerals 12a and 12b denote pads and conductive wiring, respectively.

[0010] The molding layer (13) is cut along the molding layer (13) cutting line (arrow) to remove the molding layer (13) on the pad area (PR). Thereafter, after the tape (15) is removed, the FPC (17) is mounted on the pad (12a) of the pad area (PR).

[0011] However, even if the process shown in Fig. 3 is applied and tape (15) is attached to protect the pad portion, molding liquid may seep between the metal patterns due to the step difference of the metal patterns such as the pad, contaminating the pad area (PR), resulting in poor electrical connection with the FPC (17).

[0012] Accordingly, there is an urgent need to develop a technology to ensure that the molding layer (13) is formed only in the display area (DR) during the molding process and does not overflow into the pad area (PR).

[0013] The present invention aims to solve the above-mentioned and other problems.

[0014] Another object of the present invention is to provide a transparent display device having a novel structure for preventing molding liquid from overflowing into the pad area.

[0015] Another object of the present invention is to provide a transparent display device having a novel structure that can simplify the process.

[0016] Another object of the present invention is to provide a transparent display device capable of preventing electrical connection failure in a pad area.

[0017] The technical problems of the embodiment are not limited to those described in this article, but include those that can be understood through the description of the invention.

[0018] According to one aspect of the present invention to achieve the above or other objects, a transparent display device includes: a transparent substrate having a pad area and a display area including a plurality of pixels; a plurality of terminals disposed on the pad area and electrically connected to a flexible printed circuit board; a plurality of light-emitting elements for the plurality of pixels; a plurality of conductive wires disposed on the display area and electrically connecting the plurality of terminals and the plurality of light-emitting elements; a plurality of connection pads electrically connecting the plurality of terminals and the plurality of conductive wires; a stopper positioned between the pad area and the display area; and a molding layer on the display area; wherein the stopper prevents a molding liquid for forming the molding layer from flowing over the pad area.

[0019] The molding liquid may stop within the stopper during the process of passing through the stopper and may not flow over to the pad area.

[0020] The plurality of terminals, the plurality of connection pads and the plurality of conductive wires may be arranged along a first direction, and the stopper may be arranged along a second direction.

[0021] The above stopper may be formed from parts of the plurality of connecting pads and may be placed between the plurality of connecting pads.

[0022] The plurality of terminals may include a plurality of first terminals, a plurality of second terminals, and a third pad, and the plurality of conductive wires may include a first power wire electrically connected to the plurality of first terminals, a second power wire electrically connected to the plurality of second terminals, and a signal wire electrically connected to the third pad, and the plurality of connection pads may include a first connection pad connecting the plurality of first terminals to the first power wire and a second connection pad connecting the plurality of second terminals to the second power wire.

[0023] The stopper may be positioned along the second direction between the first connection pad and the second connection pad.

[0024] The stopper may include at least one first extension pad extending from the first connection pad toward the second connection pad; and at least one second extension pad extending from the second connection pad toward the first connection pad.

[0025] The stopper may further include a third extension pad extending in a zigzag shape between the at least one first extension pad and the at least one second extension pad.

[0026] The third extension pad may be electrically connected to the third pad and the signal wiring.

[0027] The third extension pad may be positioned between the first connection pad and the second extension pad.

[0028] The third extension pad may be positioned between the second connection pad and the first extension pad.

[0029] The transparent display device may further include one or more stuffing patterns positioned on the plurality of conductive wires closest to each of the plurality of light-emitting elements.

[0030] The above stuffing pattern may have a closed loop structure.

[0031] The effects of the transparent display device according to the embodiment are described as follows.

[0032] According to at least one of the embodiments, a stopper is arranged between the pad area and the display area, so that the molding liquid on the display area can be blocked by the stopper and not flow into the pad area during the molding process. Accordingly, the process can be simplified because an additional process of removing molding residue separately due to the molding liquid flowing into the pad area is not required, as is the case in the past. In addition, since the molding liquid does not flow into the pad area, electrical connection failure between the flexible printed circuit board and the pad area can be prevented.

[0033] According to at least one of the embodiments, one or more stuffing patterns are arranged on a plurality of conductive wires closest to the light-emitting element, thereby preventing solder from flowing along the conductive wires. Accordingly, the solder under the light-emitting element no longer flows laterally, thereby minimizing electrical contact failure.

[0034] Further scope of applicability of the embodiments will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the embodiments will be readily apparent to those skilled in the art, it should be understood that the detailed description and specific embodiments, such as preferred embodiments, are given by way of example only.

[0035] Figure 1a is a plan view illustrating a typical transparent display device.

[0036] Figure 1b is a cross-sectional view illustrating a molding process in a typical transparent display device.

[0037] Figure 2 illustrates the molding liquid overflowing into the pad area.

[0038] Figure 3 is a drawing explaining a conventional molding process.

[0039] FIG. 4 is a plan view illustrating a transparent display device according to the first embodiment.

[0040] FIG. 5 is a cross-sectional view illustrating a transparent display device according to the first embodiment.

[0041] Fig. 6 is a product photograph of a transparent display device according to an embodiment.

[0042] Figure 7a illustrates a solder formed on a plurality of terminals arranged in a pixel.

[0043] Figure 7b illustrates a mounting defect of a light-emitting element using solder.

[0044] Fig. 8 is a plan view illustrating a transparent display device according to a second embodiment.

[0045] The sizes, shapes, and dimensions of components depicted in the drawings may differ from the actual components. Furthermore, even if the same components are depicted with different sizes, shapes, and dimensions across drawings, this is merely an example within the drawings, and the same components may have the same sizes, shapes, and dimensions across drawings.

[0046] Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes 'module' and 'part' used for components in the following description are assigned or used interchangeably in consideration of the ease of writing the specification, and do not have distinct meanings or roles in themselves. In addition, the attached drawings are intended to facilitate easy understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the attached drawings. In addition, when an element such as a layer, region, or substrate is referred to as existing 'on' another element, this includes that it may be directly on the other element or that other intermediate elements may exist therebetween.

[0047] Fig. 4 is a plan view illustrating a transparent display device according to the first embodiment. Fig. 5 is a cross-sectional view illustrating a transparent display device according to the first embodiment.

[0048] Referring to FIGS. 4 and 5, a transparent display device (100) according to the first embodiment may include a transparent substrate (110), a plurality of terminals (111 to 113), a plurality of conductive wires (121 to 123), a plurality of light-emitting elements (141), a stopper (130), a molding layer (140), etc.

[0049] A plurality of transparent substrates (110) are provided, and the transparent substrates (110) may be electrically connected using interconnectors, but this is not limited thereto.

[0050] The transparent substrate (110) may be made of a transparent material. For example, the transparent substrate (110) may be made of a PET (Polyethylene Terephthalate) material, but is not limited thereto.

[0051] A transparent substrate (110) can be divided into a display area (DR) and a non-display area. A plurality of pixels (PX) can be arranged in the display area (DR). A pixel (PX) can be the minimum unit capable of displaying a full-color image.

[0052] The non-display area is an area where pixels (PX) are not arranged, and may include a pad area (PR) and a stopper (130).

[0053] A plurality of terminals (111 to 113) and a plurality of connection pads (114, 115) may be arranged on a pad region (PR), and a plurality of conductive wires (121 to 123) may be arranged on a display region (DR). The plurality of terminals (111 to 113) (or the plurality of connection pads (114, 115)) and the plurality of conductive wires (121 to 123) may be electrically connected to each other. The plurality of terminals (111 to 113), the plurality of connection pads (114, 115), and the plurality of conductive wires (121 to 123) may be formed integrally by performing the same patterning process with the same metal, but are not limited thereto.

[0054] A plurality of terminals (111 to 113) and a plurality of conductive wires (121 to 123) can be arranged along the first direction (x).

[0055] A flexible printed circuit board (FPCB) can be electrically connected to a plurality of terminals (111 to 113). A driving board, a power supply, etc. can be mounted on the flexible printed circuit board. The driving board can output, for example, digital data, a programming signal, etc., and the power supply can output a first power voltage, a second power voltage, etc. The power supply can also be included in the driving board. The digital data, the programming signal, the first power voltage, the second voltage, etc. can be provided to a plurality of conductive wires (121 to 123) via a plurality of connection pads (114, 115) from a plurality of terminals (111 to 113) along a first direction (x).

[0056] The plurality of terminals (111 to 113) may include a plurality of first terminals (111), a plurality of second terminals (112), a plurality of third pads (113), etc. The plurality of connection pads (114, 115) may include a first connection pad (114), a second connection pad (115), etc. The plurality of first terminals (111) may be electrically connected to the first connection pad (114). The plurality of second terminals (112) may be electrically connected to the second connection pad (115).

[0057] A plurality of light-emitting elements (141) may be mounted on a plurality of pixels (PX) of a display area (DR). The plurality of pixels (PX) may be arranged on the display area (DR) on a transparent substrate (110).

[0058] A plurality of conductive wires (121 to 123) may be arranged along a first direction (x) on a display area (DR) of a transparent substrate (110). The plurality of conductive wires (121 to 123) may be electrically connected to a plurality of light-emitting elements (141) in a plurality of pixels (PX).

[0059] A plurality of conductive wires (121 to 123) can be electrically connected to a plurality of terminals (111 to 113) on the pad area (PR).

[0060] The plurality of conductive wires (121 to 123) may include signal wires (123), power wires (121, 122), etc. The signal wires (123) and the plurality of power wires (121, 122) may be electrically connected to the plurality of light-emitting elements (141) arranged in the first direction (x).

[0061] The plurality of power wires may include a first power wire (121) and a second power wire (122). The plurality of first terminals (111) may be electrically connected to the first power wire (121) via a first connection pad (114). The plurality of second terminals (112) may be electrically connected to the second power wire (122) via a second connection pad (115).

[0062] The first power supply line (121) can supply a first power supply voltage, and the second power supply line (122) can supply a second power supply voltage that is lower than the first power supply voltage. The first power supply voltage can be referred to as a high-potential voltage, and the second power supply voltage can be referred to as a low-potential voltage. The second power supply voltage is 0 V and can be grounded, but is not limited thereto.

[0063] The signal wires (123) can supply digital data, programming signals, etc., but are not limited thereto.

[0064] As an example, the plurality of digital data and / or the plurality of programming signals supplied to the plurality of light-emitting elements (141) during one frame may be different from each other. Accordingly, the plurality of light-emitting elements (141) may emit light to display images of different grayscales during one frame. As another example, the digital data and / or the programming signals provided to the same light-emitting element (141) for each frame may be different from each other. Accordingly, the same light-emitting element (141) may emit light to display images of different grayscales for each frame.

[0065] The molding layer (140) may be disposed on the display area (DR). The molding layer (140) may be disposed on a plurality of pixels (PX). The molding layer (140) may be disposed on a plurality of light-emitting elements (141). The molding layer (140) may vertically overlap the display area (DR).

[0066] Since a plurality of terminals (111 to 113) are directly electrically connected to the flexible printed circuit board on the pad area (PR), the molding layer (140) is not disposed on the pad area (PR) so that the plurality of terminals (111 to 113) are exposed to the outside. The molding layer (140) may not vertically overlap the pad area (PR).

[0067] A liquid molding solution may be dispensed onto the display area (DR) to form a molding layer (140). As illustrated in FIG. 1B, the molding solution on the display area (DR) may overflow into the pad area (PR), so that the molding layer (140) may be formed not only on the display area (DR) but also on the pad area (PR). In this case, in order to electrically connect the flexible printed circuit board to a plurality of terminals (111 to 113) on the pad area (PR), there has been an inconvenience in that the molding layer (140) on the pad area (PR) must be removed so that the terminals on the pad area (PR) are opened.

[0068] However, as illustrated in FIG. 5, since the molding layer (140) is formed only on the display area (DR) and not on the pad area (PR) in the embodiment, the inconvenience of having to remove the molding layer (140) on the pad area (PR) can be eliminated. In addition, since the molding layer (140) itself is not formed on the pad area (PR), there are no foreign substances on the pad area (PR), so that electrical connection failure of the flexible printed circuit board can be prevented.

[0069] For this purpose, in the embodiment, a stopper (130) may be placed between the pad area (PR) and the display area (DR). As described above, a non-display area may be formed by the pad area (PR) and the stopper (130). The stopper (130) may function as a dam or barrier to prevent the molding liquid on the display area (DR) from flowing over to the pad area (PR). The stopper (130) may be placed lengthwise along the second direction (y). In the drawing, the second direction (y) is depicted as being perpendicular to the first direction (x), but is not limited thereto.

[0070] The stopper (130) is formed from parts of a plurality of connection pads (114, 115) and can be placed between the plurality of connection pads (114, 115). For example, the stopper (130) can be placed along the second direction (y) between the first connection pad (114) and the second connection pad (115).

[0071] The plurality of first terminals (111) and the plurality of second terminals (112) may be power terminals. The plurality of first terminals (111) may be electrically connected to a first power wire (121) on the display area (DR) via a first connection pad (114). The plurality of second terminals (112) may be electrically connected to a second power wire (122) on the display area (DR) via a second connection pad (115). The third pad (113) may be a signal pad and may be electrically connected to a signal wire (123) on the display area (DR).

[0072] The stopper (130) may include at least one first extension pad (131), at least one second extension pad (132), a third extension pad (133), etc.

[0073] At least one first extension pad (131) may extend from the first connection pad (114) toward the second connection pad (115) in the second direction (y). At least one second extension pad (132) may extend from the second connection pad (115) toward the first connection pad (114) in the second direction (y). A third extension pad (133) may extend in a zigzag shape between at least one first extension pad (131) and at least one second extension pad (132).

[0074] At least one of the first extension pad (131), the second extension pad (132), and the third extension pad (133) may have the same thickness as the pads (111 to 113) or the conductive wiring (121 to 123), but is not limited thereto. At least one of the first extension pad (131), the second extension pad (132), and the third extension pad (133) may have the same width as the pads (111 to 113) or the conductive wiring (121 to 123), but is not limited thereto.

[0075] The third extension pad (133) may be symmetrical with respect to an imaginary line crossing the third pad (113) and the signal wire (123), but is not limited thereto.

[0076] The third extension pad (133) may be positioned between the first extension pad (131) and the second connection pad (115). The third extension pad (133) may be positioned between the first connection pad (114) and the second extension pad (132).

[0077] The third extension pad (133) can surround each of the first extension pad (131) and the second extension pad (132).

[0078] The gap between the first extension pad (131) and the third extension pad (133) may be the same as the gap between the second extension pad (132) and the third extension pad (133), but is not limited thereto.

[0079] The third extension pad (133) can be electrically connected to the third pad (113) and the signal wire (123). In this case, digital data, etc. provided to the third pad (113) can be transmitted to the signal wire (123) via the third extension pad (133).

[0080] As shown in Fig. 6, the stopper (130) can prevent the molding liquid formed on the display area (DR) from flowing over to the pad area (PR).

[0081] In the above, it has been described that the plurality of connection pads (114, 115) are not included in the stopper (130). Alternatively, the plurality of connection pads (114, 115) may be included in the stopper (130). That is, the stopper (130) may include not only the plurality of connection pads (114, 115), but also a first extension pad (131), a second extension pad (132), and a third extension pad (133).

[0082] According to an embodiment, a stopper (130) is arranged between the pad area (PR) and the display area (DR), so that the molding liquid on the display area (DR) may be blocked by the stopper (130) during the molding process and may not flow into the pad area (PR). Accordingly, an additional process of separately removing molding residue due to the molding liquid flowing into the pad area (PR) as in the past is not required, thereby simplifying the process. In addition, since the molding liquid does not flow into the pad area (PR), electrical connection failure between the flexible printed circuit board and the pad area (PR) can be prevented.

[0083] Meanwhile, as illustrated in FIGS. 4 and 5, the transparent display device (100) according to the embodiment may include a plurality of stuffing patterns (118a, 118b).

[0084] One or more stuffing patterns (118a, 118b) may be arranged on a plurality of conductive wires (121 to 123) closest to the light emitting element (141). One or more stuffing patterns (118a, 118b) may be formed on a plurality of conductive wires (121 to 123). The stuffing patterns (118a, 118b) may have a closed-loop structure. The stuffing patterns (118a, 118b) may have a ring shape, but are not limited thereto.

[0085] As illustrated in Fig. 7a, a light-emitting element can be mounted on a pixel (PX) using solder (27). When the light-emitting element is pressurized, the solder (27) underneath the light-emitting element can flow laterally, as illustrated in Fig. 7b. In this case, an electrical short may occur between a plurality of terminals (121 to 126) due to the solder (27) flowing laterally, or an insufficient amount of solder (27) underneath the light-emitting element may cause poor electrical contact of the light-emitting element.

[0086] However, according to an embodiment, the solder (27) that has flowed laterally is filled into one or more stuffing patterns (118a, 118b), so that it no longer flows laterally. Accordingly, the solder (27) under the light-emitting element (141) no longer flows laterally, so that poor electrical contact can be minimized.

[0087] Although not shown, a protective film may be placed under the transparent substrate (110) and a cover film may be placed on the molding layer (140).

[0088] A cover film can be attached to the glass window of a building, etc. using an adhesive. The cover film can have an adhesive strength or fixing strength that can withstand the load of all components of the transparent display device (100) according to the embodiment.

[0089] In an embodiment, the transparent display device (100) may be a top-emitting transparent display device, but is not limited thereto. In this case, light generated from a plurality of light-emitting elements (141) may be emitted upward through the molding layer (140) and the cover film.

[0090] Fig. 8 is a plan view illustrating a transparent display device according to a second embodiment.

[0091] The second embodiment is similar to the first embodiment (Fig. 4) except for the visual characteristic improvement structures (171, 172) including protrusions (171a, 171b, 172a, 172b). In the second embodiment, components having the same structure, shape, and / or function as those in the first embodiment are given the same drawing reference numerals, and a detailed description thereof is omitted.

[0092] Referring to FIG. 8, a transparent display device (101) according to the second embodiment may include a transparent substrate (110), a plurality of terminals (111 to 113), a plurality of conductive wires (121 to 123), a plurality of light-emitting elements (141), a stopper (130), a molding layer (140), etc.

[0093] A transparent substrate (110) can be divided into a pad region (PR) and a display region (DR). A plurality of terminals (111 to 113) and a plurality of connection pads (114, 115) can be arranged on the pad region (PR), and a plurality of conductive wires (121 to 123) can be arranged on the display region (DR).

[0094] A plurality of conductive wires (121 to 123) can be arranged on the display area (DR) along the first direction (x).

[0095] In an embodiment, the plurality of conductive wires (121 to 123) may have a mesh structure having a plurality of sub-wires. The plurality of sub-wires may be electrically connected to each other along a first direction (x) and a second direction (y).

[0096] For example, a plurality of sub-wires included in the first power wire (121) may be electrically connected to each other along the second direction (y). For example, a plurality of sub-wires included in the second power wire (122) may be electrically connected to each other along the second direction (y). For example, the signal wire (123) may not have a mesh structure.

[0097] The plurality of conductive wires (121 to 123) are not electrically connected to each other because an electrical short occurs between them.

[0098] For example, the first power wire (121) and the second power wire (122) may not be electrically connected along the second direction (y). For example, the first power wire (121) and the signal wire (123) may not be electrically connected along the second direction (y). For example, the second power wire (122) and the signal wire (123) may not be electrically connected along the second direction (y).

[0099] In this case, the outermost sub-wiring of the first power wiring (121) and the signal wiring (123) are not electrically connected to each other, the signal wiring (123) and the outermost sub-wiring of the second power wiring (122) are not electrically connected to each other, and the outermost sub-wiring of the first power wiring (121) and the outermost sub-wiring of the second power wiring (122) may not be electrically connected to each other.

[0100] This arrangement structure may degrade visual characteristics. To address this issue, in embodiments, a structure for improving visual characteristics may be provided.

[0101] The visual characteristic improvement structure may be provided between the outermost sub-wiring of the first power wiring (121) and the outermost sub-wiring of the second power wiring (122). The visual characteristic improvement structure may be provided between the signal wiring (123) and the first power wiring (121) or / and the second power wiring (122).

[0102] The visual characteristic improvement structures (171, 172) may each include a plurality of protrusions (171a, 171b, 172a, 172b).

[0103] For example, a plurality of first protrusions (171a) may extend from the outermost sub-wiring of the second power wiring (122) toward the first power wiring (121) along the second direction (y), and a plurality of second protrusions (171b) may extend from the outermost sub-wiring of the first power wiring (121) toward the outermost sub-wiring of the second power wiring (122) along the second direction (y), thereby forming a first visual characteristic improvement structure (171).

[0104] For example, a plurality of third protrusions (172a) may extend from the signal wire (123) toward the first power wire (121), and a plurality of fourth protrusions (172b) may extend from the signal wire (123) toward the second power wire (122), thereby forming a second visual characteristic improvement structure (172).

[0105] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the embodiments should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalency range of the embodiments are intended to be included within the scope of the embodiments.

Claims

1. A transparent substrate having a pad area and a display area including a plurality of pixels; A plurality of terminals arranged on the above pad area and electrically connected to the flexible printed circuit board; A plurality of light emitting elements in the plurality of pixels; A plurality of conductive wires arranged on the display area to electrically connect the plurality of terminals and the plurality of light-emitting elements; A plurality of connection pads electrically connecting the plurality of terminals and the plurality of conductive wires; a stopper positioned between the pad area and the display area; and A molding layer is included on the above display area; The above stopper prevents the molding liquid for forming the molding layer from flowing into the pad area. Transparent display device.

2. In paragraph 1, The molding liquid stops within the stopper during the process of passing through the stopper and does not flow into the pad area. Transparent display device.

3. In paragraph 1, The plurality of terminals, the plurality of connection pads and the plurality of conductive wires are arranged along the first direction, The above stopper is arranged along the second direction, Transparent display device.

4. In paragraph 1, The above stopper is formed by parts of the plurality of connecting pads and is placed between the plurality of connecting pads. Transparent display device.

5. In paragraph 1, The above plurality of terminals include a plurality of first terminals, a plurality of second terminals and a third pad, The plurality of conductive wires include a first power wire electrically connected to the plurality of first terminals, a second power wire electrically connected to the plurality of second terminals, and a signal wire electrically connected to the third pad, The plurality of connection pads include a first connection pad that connects the plurality of first terminals to the first power wiring and a second connection pad that connects the plurality of second terminals to the second power wiring. Transparent display device.

6. In paragraph 5, The above stopper, arranged along the second direction between the first connection pad and the second connection pad, Transparent display device.

7. In paragraph 6, The above stopper, At least one first extension pad extending from the first connection pad toward the second connection pad; and At least one second extension pad extending from the second connection pad toward the first connection pad; Transparent display device.

8. In paragraph 7, The above stopper, Further comprising a third extension pad extending in a zigzag shape between the at least one first extension pad and the at least one second extension pad; Transparent display device.

9. In paragraph 8, The third extension pad is electrically connected to the third pad and the signal wiring. Transparent display device.

10. In paragraph 8, The third extension pad is positioned between the first connection pad and the second extension pad. Transparent display device.

11. In paragraph 8, The third extension pad is positioned between the second connection pad and the first extension pad. Transparent display device.

12. In paragraph 1, further comprising one or more stuffing patterns positioned on the plurality of conductive wires closest to each of the plurality of light-emitting elements; Transparent display device.

13. In paragraph 13, The above stuffing pattern has a closed loop structure. Transparent display device.

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