Transparent display device and manufacturing method of spliced display device

Abstract

This invention provides a transparent display device and a method for manufacturing a spliced ​​display device. The transparent display device includes a substrate, a plurality of units, and a first alignment mark. The substrate has a display area. The units are disposed within the display area and are repeatedly arranged along a first direction and a second direction. Each unit includes at least one pixel area and at least one transparent area, and each unit includes at least one light-emitting element corresponding to the pixel area. The first alignment mark is disposed in the display area and is formed by at least two pattern layers, wherein at least one of the pattern layers includes metal, and in a top view, the first alignment mark is disposed within one of the units.

Description

Technical Field

[0001] This invention relates to a transparent display device and a method for manufacturing a splicing display device, and particularly to a transparent display device with alignment marks and a method for manufacturing a splicing display device. Background Technology

[0002] With the advancement of technology, transparent display devices have been developed that allow users to clearly see the scenery behind them. Traditional transparent display devices need to include multiple transparent areas so that users can view the scenery through these areas. Therefore, how to improve the visual effect of viewing scenery through transparent display devices is one of the issues in this field. Summary of the Invention

[0003] One of the objectives of this invention is to provide a method for manufacturing a transparent display device and a splicing display device, so as to improve the visual effect of the transparent display device and the splicing display device.

[0004] According to one embodiment, the present invention provides a transparent display device comprising a substrate, a plurality of units, and a first alignment mark. The substrate has a display area. Units are disposed within the display area and are repeatedly arranged along a first direction and a second direction. Each unit includes at least one pixel area and at least one transmissive area, wherein each unit includes at least one light-emitting element corresponding to the pixel area. The first alignment mark is disposed in the display area and is formed by at least two pattern layers, wherein at least one of the pattern layers includes metal, and in a top-view direction, the first alignment mark is disposed within one of the units.

[0005] According to another embodiment, the present invention provides a method for manufacturing a splicing display device. First, a first display panel and a second display panel are provided, wherein the method for manufacturing each of the first and second display panels includes providing a substrate having a display area; forming a plurality of first alignment marks in the display area; and forming at least one second alignment mark on the substrate. Forming the first alignment marks includes forming a plurality of first sub-marks on the substrate; providing a plurality of photomasks and splicing the photomasks using the first sub-marks; and forming a plurality of second sub-marks on the first sub-marks. Then, the first display panel and the second display panel are spliced ​​using the second alignment marks of the first display panel and the second alignment marks of the second display panel.

[0006] In the manufacturing method of the transparent display device and the splicing display device of the present invention, by setting the first alignment mark in one unit, the influence of the first alignment mark on the visual effect can be reduced. Attached Figure Description

[0007] Figure 1The diagram shown is a top view of a transparent display device according to a first embodiment of the present invention.

[0008] Figure 2 The diagram shows a top view of a first alignment mark according to some embodiments and a partial cross-sectional view of the first alignment mark corresponding to the transparent display device.

[0009] Figure 3 The diagram shows a top view of a first alignment mark according to some embodiments and a partial cross-sectional view of the first alignment mark corresponding to the transparent display device.

[0010] Figure 4 The diagram shown is a schematic representation of a method for manufacturing a transparent display device according to a variation of the first embodiment of the present invention.

[0011] Figure 5 The diagram shown is a top view of a transparent display device according to another variation of the first embodiment of the present invention.

[0012] Figure 6 The diagram shown is a top view of a transparent display device according to a second embodiment of the present invention.

[0013] Figure 7 The diagram shown is a top view of a transparent display device according to a variation of the second embodiment of the present invention.

[0014] Figure 8 The diagram shown is a top view of a transparent display device according to a third embodiment of the present invention.

[0015] Figure 9 The diagram shown is a top view of a transparent display device according to a variation of the third embodiment of the present invention.

[0016] Figure 10 The diagram shown is a top view of a transparent display device according to another variation of the third embodiment of the present invention.

[0017] Figure 11 The diagram shown is a top view of a transparent display device according to a fourth embodiment of the present invention.

[0018] Figure 12 The diagram shown is a top view of a splicing display device according to a fifth embodiment of the present invention.

[0019] Figure 13 The diagram shown is a top view of a splicing display device according to a variation of the fifth embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 12-substrate; 12S-edge; 12S1-top surface; 14-unit; 16a, 16b, 16c-light-emitting elements; 1a, 1b, 1c, 2a, 2b, 3a, 3b, 3c, 4-transparent display devices; 51, 52-slicing display devices; 5a, 5b-display panels; AL-anti-reflective layer; AMR-alignment mark area; CL-cut line; D1, D2, D31, D32, D33-distance; DR-display area; IN1, IN2, IN3, IN4, IN5-insulating layers; L1-first conductor; L2-second conductor; L3-third conductor; LS1-first conductor group; LS2-second conductor group; LS3- Third conductor group; M1, M11, M12, M13 - First alignment mark; M2, M22, M21 - Second alignment mark; ML1, ML2 - Metal layer; MP1, MP2 - Metal pattern; MR - Photomask area; NAMR - Non-alignment mark area; NDR - Non-display area; P1 - First strip; P2 - Second strip; PM1, PM2 - Photomask; PP - Pixel area; PXR - Pixel area; S1, S2, S3 - Side; SM1 - First sub-mark; SM2 - Second sub-mark; SM3 - Third sub-mark; SM4 - Fourth sub-mark; SP1, SP2 - Block area; TH - Perforation; TR1, TR2 - Penetration area; X, Y, Z - Direction. Detailed Implementation

[0021] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings. To make the invention clearer and easier to understand, the accompanying drawings are simplified schematic diagrams, and the elements therein may not be drawn to scale. Furthermore, the number and dimensions of the elements in the drawings are merely illustrative and are not intended to limit the scope of the invention.

[0022] Throughout this specification and the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same elements, and this document is not intended to distinguish between elements that have the same function but different names. In the following specification and claims, words such as "containing" and "comprising" are open-ended terms and should therefore be interpreted as "containing but not limited to...".

[0023] The use of ordinal numbers, such as “first”, “second”, etc., in the specification and claims to modify elements of the claims does not in itself imply or represent any prior ordinal number of the claimed element, nor does it represent the order of one claimed element with another, or the order of manufacturing process. The use of such ordinal numbers is only to enable a claim element with a certain name to be clearly distinguished from another claim element with the same name.

[0024] The directional terms used in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0025] Furthermore, when an element or membrane is referred to as being on or above another element or membrane, or as being connected to another element or membrane, it should be understood that the element or membrane is directly located on or directly connected to the other element or membrane, or that there may be other elements or membranes (indirectly) between them. Conversely, when an element or membrane is referred to as being "directly" on or "directly connected" to another element or membrane, it should be understood that there are no inserted elements or membranes between them. Additionally, the terms "electrical connection" or "coupling" include any direct and indirect means of electrical connection.

[0026] In this text, the terms "approximately," "substantially," "roughly," or "same" typically indicate a range within 20%, 10%, 5%, 3%, 2%, 1%, or 0.5% of a given value. The given quantity is approximate; that is, even without specific mention of "approximately," "substantially," "roughly," or "same," the meaning of "approximately," "substantially," "roughly," or "same" may still be implied.

[0027] It should be understood that the following embodiments can be modified by replacing, recombining, or mixing features from multiple different embodiments to complete other embodiments without departing from the spirit of the invention. Features from different embodiments can be arbitrarily mixed and matched as long as they do not violate the spirit of the invention or conflict with it.

[0028] In this invention, the thickness, area, width, height and distance can be measured by optical microscope (OM), electron microscope (e.g., scanning electron microscope (SEM)) or other methods, and can be determined by the same photograph or two or more photographs, but is not limited thereto.

[0029] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It is understood that these terms, for example, as defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this invention, and should not be interpreted in an idealized or overly formal manner, unless specifically defined in the embodiments of this invention.

[0030] The transparent display device and splicing display device of the present invention can also be applied to various electronic devices. The electronic device can be bendable, stretchable, and / or flexible, but is not limited thereto. The electronic device may include, for example, a sensing device, a light-emitting device, a display device, an antenna device, a touch device, a splicing device, or other suitable electronic devices, but is not limited thereto. The sensing device of the present invention is primarily an optical sensing device, but is not limited thereto. The sensing device may be, for example, a sensing device for detecting changes in capacitance, light, heat, or ultrasound, but is not limited thereto. The sensing device may include, for example, a biosensor, a touch sensor, a fingerprint sensor, other suitable sensors, or combinations of the above types of sensors, but is not limited thereto. The display device can be applied, for example, to laptops, public displays, splicing displays, automotive displays, touch displays, televisions, monitors, smartphones, tablets, light source modules, lighting equipment, or electronic devices applied to the above products, but is not limited thereto. Display devices may include, for example, light-emitting elements, fluorescent materials, phosphorescent materials, other suitable display media, or combinations thereof, but are not limited thereto. Light-emitting elements may include, for example, organic light-emitting diodes (OLEDs), mini LEDs, micro LEDs, or quantum dot LEDs (QDs, such as QLEDs and QDLEDs), or other suitable materials, or any arrangement or combination of the above materials, but are not limited thereto. Antenna devices may be, for example, liquid crystal antennas or other types of antennas, but are not limited thereto. Splicing devices may include, for example, splicing display devices or splicing antenna devices, but are not limited thereto. Furthermore, the shape of the electronic device may be, for example, rectangular, circular, polygonal, with curved edges, curved, or other suitable shapes. The electronic device may have peripheral systems such as a drive system, control system, light source system, shelf system, etc. The electronic device may include electronic components, which may include passive and active components, such as capacitors, resistors, inductors, diodes, transistors, sensors, etc. It should be noted that the electronic device of the present invention can be various combinations of the above-described devices, but is not limited thereto.

[0031] The following diagram illustrates directions X, Y, and Z. Direction Z can be the normal direction of the transparent display device or the top-view direction, such as... Figure 2 The direction Z can be perpendicular to an upper surface 12S1 of a substrate 12. Directions X and Y can be horizontal and perpendicular to direction Z, such as... Figure 2Directions X and Y can be parallel to the upper surface 12S1 of substrate 12, and directions X and Y can be perpendicular to each other. The following diagrams can be used to describe the spatial relationship of the structure based on directions X, Y, and Z.

[0032] Please refer to Figure 1 The diagram shown is a top view of a transparent display device according to a first embodiment of the present invention. Figure 1 As shown, the transparent display device 1a includes a substrate 12, a plurality of units 14, and a first alignment mark M1. The substrate 12 has a display area DR, and the units 14 are disposed within the display area DR and are repeatedly arranged along a first direction (e.g., direction X) and a second direction (e.g., direction Y). Each unit 14 includes at least one pixel area PXR and at least one transmissive area TR1, wherein each of the units 14 includes at least one light-emitting element (e.g., light-emitting element 16a, light-emitting element 16b, or light-emitting element 16c) corresponding to the pixel area PXR. The first alignment mark M1 is disposed in the display area DR, and the first alignment mark M1 is formed by at least two pattern layers, wherein at least one of the pattern layers includes metal, and in a top view direction (e.g., direction Z), the first alignment mark M1 is disposed within one of the units 14.

[0033] exist Figure 1 In this display area DR, multiple photomask areas MR can be joined together to form the display area DR, allowing components within the display area DR to be formed by joining different photomasks or different exposures of the same photomask. In other words, each photomask area MR can correspond to a different photomask or to the same photomask at different exposure positions (shots). For example, the transparent display device 1a may have slight display unevenness (shot mura) at the adjacent areas of photomask areas MR, and the range of photomask areas MR can be determined by the range surrounded by the display unevenness. It should be noted that since smaller photomask sizes generally allow for finer patterns, joining photomasks can help reduce the critical dimension (CD) of components within the display area DR. This invention is not limited thereto. In some embodiments, any pattern layer within the display area DR, such as the metal layer closest to the substrate 12, can also be formed using a single photomask.

[0034] exist Figure 1Each photomask region MR includes at least two alignment mark regions AMR, and the arrangement direction of the alignment mark regions AMR may be different from directions X and Y, so that the photomask can be aligned with the photomask region MR of the substrate 12 in directions X and Y. In this embodiment, the photomask region MR is rectangular, and the alignment mark regions AMR of each photomask region MR may be two non-adjacent corners of the corresponding photomask region MR. Furthermore, the arrangement direction of the alignment mark regions AMR of different photomask regions MR may be the same, but is not limited to this. In some embodiments, the arrangement direction of the alignment mark regions AMR of different photomask regions MR may be different. For example, one of the alignment mark regions AMR of a photomask region MR located on the left side may be adjacent to one of the alignment mark regions AMR of a photomask region MR located on the right side, to facilitate the splicing of the photomasks corresponding to the two photomask regions MR, for example. Figure 4 As shown.

[0035] Figure 1 The right side further shows an enlarged schematic diagram of the alignment mark region AMR. According to this embodiment, each alignment mark region AMR may contain multiple first alignment marks M1, but is not limited to this. The structure of the first alignment marks M1 and unit 14 will be further described below. Figure 1 As shown on the right, the transparent display device 1a may further include a first conductor group LS1 and a second conductor group LS2, disposed within the display area DR. The first conductor group LS1 extends along a first direction (e.g., direction X), and the second conductor group LS2 intersects with the first conductor group LS1. In this embodiment, the transparent display device 1a may include multiple first conductor groups LS1 and multiple second conductor groups LS2. The first conductor groups LS1 may be arranged in a second direction (e.g., direction Y), and the second conductor groups LS2 may extend along direction Y and be arranged in direction X. The first conductor groups LS1 and second conductor groups LS2 may intersect each other and be electrically insulated. The first conductor group LS1 may be composed of a single first conductor L1, and the second conductor group LS2 may be composed of a single second conductor L2, but are not limited thereto.

[0036] According to this embodiment, the transparent display device 1a may further include a plurality of light-emitting elements, each disposed in a corresponding pixel area PXR. The light-emitting elements may include, for example, light-emitting elements 16a, 16b, and 16c, for generating light of different colors, such as red, green, and blue light, or combinations of other suitable colors. Light-emitting elements 16a, 16b, and 16c may each serve as sub-pixels of different colors and may form a pixel, but are not limited thereto. In some embodiments, at least two of the light-emitting elements 16a, 16b, and 16c may also include, for example, light-emitting diodes of the same color paired with corresponding light-conversion materials, and the light-conversion materials may be adjusted according to the color of the light-emitting elements, but are not limited thereto.

[0037] exist Figure 1 In the embodiments, light-emitting elements 16a, 16b, and 16c can be arranged, for example, in an array. Light-emitting elements 16a, 16b, and 16c in the same row can be arranged alternately in sequence, and light-emitting elements in the same column can be light-emitting elements 16a, 16b, or 16c that produce the same color, but the arrangement of the light-emitting elements is not fixed. Figure 1 The illustration is for illustrative purposes only. In some embodiments, light-emitting elements 16a, 16b, and 16c that produce different colors of light may also be arranged alternately in the same column, and the light-emitting elements in the same row may be light-emitting elements 16a, 16b, or 16c that produce the same color. In some embodiments, each light-emitting element may be electrically connected to its corresponding first conductor L1 and second conductor L2 via other components and / or wiring, but is not limited thereto. Other components may include, for example, transistors or suitable components.

[0038] In this embodiment, the light-emitting elements in each row and each first wire group LS1 can be arranged alternately along the Y direction, and each second wire group LS2 and each column of light-emitting elements can be arranged alternately along the X direction, but this is not limited to this. For example, the first wire L1 and the second wire L2 can be scan lines and data lines, respectively, so that each first wire L1 can be used to transmit the gate signal controlling the switching of the corresponding light-emitting element, and each second wire can be used to transmit the grayscale signal of the corresponding light-emitting element, but this is not limited to this. In some embodiments, the first wire L1 and the second wire L2 can also be data lines and scan lines or other suitable signal line combinations, respectively. The first wire L1 and the second wire L2 of the present invention are not limited to this. Figure 1 The straight lines shown are the only limit. In some embodiments, the extension directions of the first conductor L1 and the second conductor L2 can be adjusted as needed, such that the extension direction of the second conductor L2 is not perpendicular to the extension direction of the first conductor L1, but this is not a limitation.

[0039] like Figure 1As shown in the right part, each penetration area TR1 can be located between two adjacent first wire groups LS1 and between two adjacent second wire groups LS2, and each pixel area PXR can also be located between two adjacent first wire groups LS1 and between two adjacent second wire groups LS2. In this architecture, the unit 14 can be the smallest repeating unit structure in the transparent display device 1a, and each unit 14 can be located at the intersection of one of the first wire groups LS1 and one of the second wire groups LS2, and can include a penetration area TR1 and a pixel area PXR. The units 14 can be arranged, for example, in an array or other suitable manner. In this case, each unit 14 can include a part of the first wire group LS1 and a part of the second wire group LS2. In each unit 14, the pixel area PXR can be located, for example, between the penetration area TR1 and the intersection of the first wire group LS1 and the second wire group LS2, but is not limited thereto. In this embodiment, each unit 14 can include a part of a first wire L1 and a part of a second wire L2.

[0040] In the alignment mark area AMR, the first alignment mark M1 can be respectively arranged within the corresponding unit 14. In the unit 14 provided with the first alignment mark M1, the ratio of the area of the first alignment mark M1 to the area of a corresponding unit 14 is less than or equal to about 50%, or less than or equal to about 30%, so as to reduce the impact on the visual effect. The first alignment mark M1 can be used, for example, for the alignment of the photomask or the splicing of different transparent display devices. Here, the first alignment mark M1 is taken as an example for aligning the photomask, but is not limited thereto. In Figure 1 In, the first alignment mark M1 can be adjacent to the intersection of one of the first wire groups LS1 and one of the second wire groups LS2, so as to increase the area of the penetration area TR1, but is not limited thereto. In some embodiments, the first alignment mark M1 can also be adjacent to the edge of one of the first wire groups LS1, the edge of one of the second wire groups LS2, the center of the penetration area TR1 or other suitable positions within the unit 14.

[0041] In Figure 1 In, the alignment mark area AMR is taken as a rectangle for example, and the number of units 14 can be the product of the number of units 14 in the same column and the number of units 14 in the same row in the alignment mark area AMR. And, in an alignment mark area AMR, the number of the first alignment marks M1 can be less than the number of units 14. For example, there can be only one first alignment mark M1 within a single unit 14, so as to reduce the impact on the visual effect. For example, the number of the first alignment marks M1 can be less than or equal to (m*n) / 2, where m is the number of units 14 in the same column in the alignment mark area AMR, n is the number of units 14 in the same row in the alignment mark area AMR, and m and n are respectively greater than 1 and less than or equal to 6 (that is, 1 < m, n ≤ 6). In Figure 1In the context of a system, when there are 6*6 units 14 in the alignment mark region AMR, that is, m=n=6, the number of the first alignment mark M1 can be less than or equal to 18, but is not limited to this.

[0042] like Figure 1 As shown on the right, in this embodiment, the alignment mark area AMR comprises 6*6 units 14. When a first alignment mark M1 is provided in one unit 14 of a row of units 14, other units 14 located on one or both sides of the unit 14 in the row may not contain a first alignment mark M1. Similarly, when a first alignment mark M1 is provided in one unit 14 of a column of units 14, other units 14 located on one or both sides of the unit 14 in the column may not contain a first alignment mark M1. In other words, the arrangement of the first alignment marks M1 in the alignment mark area AMR does not follow a repetitive pattern and can be a random arrangement. However, this invention is not limited to this and other random arrangements are also possible. For example, the arrangement direction of two adjacent first alignment marks M1 may differ from the direction X of the row unit 14 and the direction Y of the column unit 14. This configuration of the first alignment marks M1 helps to reduce the impact of the first alignment marks M1 on the visual effect of the transparent display device 1a.

[0043] like Figure 1 As shown on the right side, the transparent display device 1a may optionally include an anti-reflective layer AL disposed on the substrate 12. Specifically, the anti-reflective layer AL may be disposed on the first conductor L1 and the second conductor L2 to improve the reflection problem of the first conductor L1, the second conductor L2 and other components, thereby improving the visual effect. The anti-reflective layer AL may, for example, contain a light-shielding material. The light-shielding material may include, for example, photoresist, ink, a blackened metal layer or other suitable materials. In some embodiments, the material of the anti-reflective layer AL may include molybdenum, titanium, chromium, silver, aluminum, gold, copper, the above oxides, the above nitrides or combinations thereof, but is not limited thereto. Specifically, the anti-reflective layer AL may, for example, have a grid shape and have multiple openings, each corresponding to a transmission area TR1. The transmission area TR1 may be defined, for example, by the corresponding openings. In other words, the portion of the transparent display device 1a corresponding to the transmission area TR1 allows ambient light to pass through, so a user on one side of the transparent display device 1a can view the scene on the other side of the transparent display device 1a through the transmission area TR1. Figure 1 In some embodiments, the transmissive region TR1 may be arranged, for example, in an array or other suitable manner. In some embodiments, when the first conductor L1 and the second conductor L2 contain a blackened metal layer or have an anti-reflective material or light-absorbing material formed on their upper surfaces, the transparent display device 1a may not contain an anti-reflective layer AL.

[0044] Furthermore, the anti-reflective layer AL may include multiple first strip-shaped portions P1 and multiple second strip-shaped portions P2, with the first strip-shaped portions P1 extending along the X direction and the second strip-shaped portions P2 extending along the Y direction. The first strip-shaped portions P1 and the second strip-shaped portions P2 interweave to form a grid shape. In this embodiment, the first strip-shaped portions P1 may cover the first conductive line L1, and the second strip-shaped portions P2 may cover the second conductive line L2, thereby improving the reflectivity of the first conductive line L1 and the second conductive line L2 and thus enhancing the visual effect. Figure 1 In the anti-reflective layer AL, there may also be a pixel portion PP located in the pixel region PXR. In the direction Z, the pixel portion PP may, for example, surround the corresponding light-emitting element to shield the lines and / or transistors electrically connected to the light-emitting element.

[0045] In this embodiment, the anti-reflective layer AL may overlap the first alignment mark M1 to further reduce the impact of the first alignment mark M1 on the visual effect of the transparent display device 1a. Specifically, the anti-reflective layer AL may include a plurality of block-shaped portions SP1 disposed within the alignment mark area AMR, and the block-shaped portions SP1 may correspond to the first alignment mark M1 respectively, for example, they may cover the corresponding first alignment mark M1 respectively, but are not limited thereto. In some embodiments, the anti-reflective layer AL may also not include the block-shaped portions SP1.

[0046] like Figure 1 As shown, the photomask area MR may also include a non-alignment mark area NAMR, located outside the alignment mark area AMR, and the non-alignment mark area NAMR is a region without alignment marks. According to this embodiment, the structure of the transparent display device 1a within the non-alignment mark area NAMR may also include a first conductor group LS1, a second conductor group LS2, a light-emitting element, and an anti-reflective layer. Its difference from the structure within the alignment mark area AMR is that it does not include the first alignment mark M1 and the blocky portion SP1; the remaining parts are the same and therefore will not be described in detail here. In some embodiments, Figure 1 The antireflective layer AL can also contain bulk portions (e.g., in the non-alignment marking region of NAMR) Figure 8 (The blocky portion SP2). In this case, the blocky portion SP2 may, for example, have the same arrangement as the blocky portion SP1 to reduce the visual difference between the aligned marker region AMR and the unaligned marker region NAMR, but is not limited thereto.

[0047] exist Figure 1 In some embodiments, the substrate 12 may also selectively have a non-display area NDR, disposed outside the display area DR, for the purpose of housing peripheral circuitry. The non-display area NDR may, for example, surround the display area DR, but is not limited thereto. In some embodiments, the non-display area NDR may also be disposed on one side of the display area DR (e.g., Figure 12 or Figure 13 (as shown) or three sides (such as) Figure 11(as shown), but not limited to this.

[0048] The substrate 12 may include, for example, a rigid substrate or a flexible substrate. The rigid substrate may include, for example, glass, ceramic, quartz or sapphire, and the flexible substrate may include, for example, polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET) or poly(methylmethacrylate) (PMMA), but is not limited thereto.

[0049] Please refer to Figure 2 The diagram shows a top view of a first alignment mark according to some embodiments and a partial cross-sectional view of the first alignment mark corresponding to the transparent display device, wherein... Figure 2 The upper part shows a top view of the first alignment mark. Figure 2 The lower part displays a transparent display device, shown in a cross-sectional view along the upper section line A-A'. (See diagram below.) Figure 2 As shown, the transparent display device 1a may include a substrate 12, an insulating layer IN1, a metal layer ML1, an insulating layer IN2, a metal layer ML2, and an insulating layer IN3, wherein the insulating layer IN1, the metal layer ML1, the insulating layer IN2, the metal layer ML2, and the insulating layer IN3 are sequentially disposed on the substrate 12. Figure 2 In this configuration, metal layer ML1 may include a metal pattern MP1, and metal layer ML2 may include a plurality of metal patterns MP2 surrounding the metal pattern MP1 in the Z direction. The metal patterns MP2 may be spaced apart from each other, but are not limited thereto. In some embodiments, the metal patterns MP2 may also be connected, for example, in a ring. Figure 2 In some embodiments, the at least two patterned layers forming the first alignment mark M1 may each contain metal, such as metal layer ML1 and metal layer ML2, respectively. In other words, the first alignment mark M1 may be formed by the metal pattern MP1 of metal layer ML1 and the metal pattern MP2 of metal layer ML2, but is not limited thereto. In some embodiments, metal layer ML1 may, for example, contain one of a first wire group and a second wire group, and metal layer ML2 may, for example, contain the other of the first wire group and the second wire group. That is, the first alignment mark M1 may be formed during the fabrication of the transparent display device 1a.

[0050] In some embodiments, metal layer ML1 may also be located above metal layer ML2. Alternatively, the insulating layer IN2 between metal layer ML1 and metal layer ML2 may not be limited to a single layer, but may have multiple insulating layers. The number of metal patterns MP2 may be, for example, four, but is not limited thereto. In some embodiments, the first alignment mark M1 may not be limited to metal patterns MP1 and MP2, but may also include a perforation in at least another insulating layer and / or a metal pattern in at least another metal layer. In some embodiments, different first alignment marks M1 may be distinguished, for example, by having different sizes or shapes of metal patterns MP1 or different widths or shapes of metal patterns MP2.

[0051] exist Figure 2 In the process, when the antireflective layer AL includes a block-shaped portion SP1, the block-shaped portion SP1 may be disposed on the insulating layer IN3, for example, and the transparent display device 1a may also selectively include an insulating layer IN4 disposed on the antireflective layer AL. The antireflective layer AL can be used to shield the first alignment mark M1 after it has been used, so as to reduce the impact of the first alignment mark M1 on the visual effect. Figure 2 The first alignment mark M1 shown can be applied to the transparent display device in any of the embodiments described above or below.

[0052] Please refer to Figure 3 The diagram shows a top view of a first alignment mark according to some embodiments and a partial cross-sectional view of the first alignment mark corresponding to the transparent display device, wherein... Figure 3 The upper part shows a top view of the first alignment mark. Figure 3 The lower part displays a transparent display device, shown in a cross-sectional view along the upper section line B-B'. (See diagram below.) Figure 3 As shown, the first alignment mark M1 in this embodiment is... Figure 2 The difference in the first alignment mark M1 is that the first alignment mark M1 can be formed by the perforation TH of the insulating layer and the metal pattern. Specifically, the transparent display device 1a may include a substrate 12, an insulating layer IN1, a metal layer ML1, an insulating layer IN2, and an insulating layer IN3, wherein the insulating layer IN1, the metal layer ML1, the insulating layer IN2, and the insulating layer IN3 are sequentially disposed on the substrate 12. Figure 3In some embodiments, the metal layer ML1 may include a metal pattern MP1, and the insulating layer IN3 may include a through-hole TH surrounding the metal pattern MP1 in the Z direction. Furthermore, at least one patterned layer forming the first alignment mark M1 may contain metal, while another patterned layer may contain insulating material, such as the metal layer ML1 and the insulating layer IN3 respectively. In other words, the first alignment mark M1 may be formed by the metal pattern MP1 of the metal layer ML1 and the through-hole TH of the insulating layer IN3, but is not limited thereto. In some embodiments, the metal layer ML1 may also be located below the insulating layer IN1 or on the insulating layer IN2 or IN3. Alternatively, the insulating layer IN3 may be directly located on and in contact with the metal layer ML1, meaning the first alignment mark M1 does not contain the insulating layer IN2. Alternatively, the space between the metal layer ML1 and the insulating layer IN3 may not be limited to a single insulating layer IN2, but may include multiple insulating layers. In some embodiments, the first alignment mark M1 may not be limited to being formed by a metal pattern MP1 and a through hole TH, but may also include a through hole in at least another insulating layer and / or a metal pattern in at least another metal layer. In some embodiments, different first alignment marks M1 may be distinguished, for example, by having different sizes or shapes of metal patterns MP1 or different widths or shapes of through holes TH.

[0053] exist Figure 3 In this embodiment, when the anti-reflective layer AL includes the block-shaped portion SP1, the anti-reflective layer AL is disposed on the insulating layer IN4 and covers the first alignment mark M1. Furthermore, the transparent display device 1a may optionally include an insulating layer IN5 disposed on the anti-reflective layer AL. The anti-reflective layer AL can be used to shield the first alignment mark M1 after its use, thereby reducing the impact of the first alignment mark M1 on the user's visual experience. Figure 3 The first alignment mark M1 shown can be applied to the transparent display device in any of the embodiments described above or below.

[0054] Please refer to Figure 4 The diagram illustrates a method for manufacturing a transparent display device according to a variation of the first embodiment of the present invention. The method for manufacturing the transparent display device 1b provided in this variation may include the following steps: providing a substrate 12; forming a plurality of first alignment marks M1 within a display area DR; and forming at least one second alignment mark M2 on the substrate 12. The step of forming the first alignment marks M1 may include forming a plurality of first sub-marks SM1 on the substrate 12; providing a plurality of photomasks PM1, and splicing the photomasks PM1 through the first sub-marks SM1; and forming a plurality of second sub-marks SM2 on the first sub-marks SM1. The manufacturing method of the present invention is not limited to the above steps, and other steps may be performed before, after, or during any of the above steps.

[0055] Specifically, such as Figure 4 As shown, step (I) is first performed to form a plurality of first sub-marks SM1 within the display area DR of the substrate 12. In step (I) of this variant embodiment, at least one second alignment mark M2 may also be selectively formed within the display area DR of the substrate 12. Figure 4 In this example, the number of second alignment marks M2 is multiple, but not limited to this. The first sub-mark SM1 and the second alignment mark M2 can, for example, be patterned on the same metal layer using the same photomask (e.g., Figure 2 or Figure 3 The metal layer ML1, which is closest to the substrate 12, is formed therein. In other words, the first sub-mark SM1 and the second alignment mark M2 can, for example, be different metal patterns separated from each other in the metal layer, but are not limited thereto. The first sub-mark SM1 can, for example, be... Figure 2 or Figure 3 The metal pattern MP1 shown is not limited to this. In some embodiments, the first sub-mark SM1 may also be formed by a perforation of any insulating layer, but is not limited to this. In some embodiments, the first sub-mark SM1 and the second alignment mark M2 may also be formed in different steps. In some embodiments, the second alignment mark M2 is not limited to being formed by a single metal layer, but may also be formed in any subsequent step.

[0056] Next, step (II) is performed, where the photomask PM1 is aligned with the substrate 12 using the first sub-mark SM1, and the photomasks PM1 are spliced ​​together. Each photomask PM1 can be aligned with the substrate 12, for example, using the first sub-mark SM1 within the corresponding two alignment mark regions AMR. Each photomask PM1 can define a corresponding photomask region MR, but is not limited thereto. In this variant embodiment, the arrangement direction of the alignment mark regions AMR corresponding to different photomasks PM1 can be different. For example, the alignment mark regions AMR in the left photomask region MR can be located at the lower left corner and the upper right corner of the photomask region MR, respectively, while the alignment mark regions AMR in the right photomask region MR can be located at the upper left corner and the lower right corner of the photomask region MR, respectively, so that the alignment mark region AMR located at the upper right corner of the left photomask region MR can be adjacent to the alignment mark region AMR located at the upper left corner of the right photomask region MR, thereby facilitating the splicing of the corresponding photomasks PM1.

[0057] Then, step (III) is performed to form a second sub-mark SM2 in the display area DR of the substrate 12 using a photomask PM1, wherein at least one of the first sub-marks SM1 and at least one of the second sub-marks SM2 can form at least one first alignment mark M11, but is not limited thereto. Figure 4 In this context, the second sub-mark SM2 can be formed, for example, by patterning the same metal layer or insulating layer using a photomask PM1. In other words, the second sub-mark SM2 can be, for example, formed by patterning the same metal layer or insulating layer using a photomask PM1. Figure 2 The metal pattern MP2 shown Figure 3 The perforated TH of the insulating layer shown, or other suitable structures.

[0058] After forming the second sub-mark SM2, step (IV) can be performed to repeat the steps of aligning and splicing the photomasks and forming sub-marks using the photomasks. For example, multiple third sub-marks SM3 are formed on a portion of the first sub-mark SM1 using another photomask. Then, a fourth sub-mark SM4 is formed on the first sub-mark SM1 using yet another photomask PM2, thereby forming multiple first alignment marks M1 within the display area DR to form the transparent display device 1b of this variant embodiment.

[0059] exist Figure 4 In this context, the third sub-mark SM3 and the fourth sub-mark SM4 can be, for example, metal patterns in a metal layer, perforations TH in an insulating layer, or other suitable structures, respectively. In other words, the first sub-mark SM1, the second sub-mark SM2, the third sub-mark SM3, and the fourth sub-mark SM4 can each be formed from different pattern layers, where the pattern layer can be, for example, a metal layer or an insulating layer. That is, the first sub-mark SM1, the second sub-mark SM2, the third sub-mark SM3, and the fourth sub-mark SM4 can be formed from metal patterns in different metal layers or from perforations in different insulating layers.

[0060] In this variant embodiment, the first alignment mark M1 may include a first alignment mark M11, a first alignment mark M12, and a first alignment mark M13. For example, at least one of the first sub-marks SM1 and at least one of the third sub-marks SM3 may form at least one first alignment mark M12, and at least one of the first sub-marks SM1 and at least one of the fourth sub-marks SM4 may form at least one first alignment mark M13, but this is not a limitation. In some embodiments, at least one of the first alignment marks M1 may also be formed by at least two of the first sub-marks SM1, the second sub-marks SM2, the third sub-marks SM3, and the fourth sub-marks SM4, but this is not a limitation.

[0061] exist Figure 4In this invention, the first alignment mark M11, the first alignment mark M12, and the first alignment mark M13 can each be formed by at least two pattern layers. At least one pattern layer of one of the first alignment marks M11, M12, and M13 may be different from the pattern layer of the other one of the first alignment marks M11, M12, and M13. Furthermore, at least one pattern layer of the first alignment mark M11, M12, and M13 may contain metal, while the other pattern layer may contain metal or an insulating material. In some embodiments, the first alignment mark M1 may be composed of not limited to two sub-marks, but may also be composed of three or more sub-marks. The steps for forming the sub-marks and the types, quantities, and steps of forming the alignment marks are not limited to... Figure 4 The above is a limited representation and can be adjusted according to actual needs.

[0062] In some embodiments, such as Figure 2 or Figure 3 As shown, after forming the first alignment mark M1, an anti-reflective layer AL can be formed on the first alignment mark M1 to shield the first alignment mark M1. In some embodiments, the anti-reflective layer AL can also shield the second alignment mark M2.

[0063] like Figure 4 It should be noted that the metal layer and insulating layer formed in steps (I), (II), (III), and (IV) may also include wires, a portion of the light-emitting element, transistors, or other suitable components in the transparent display device 1b. That is, the first alignment mark M1 and the second alignment mark M2 are formed during the fabrication of the transparent display device 1b. The transparent display device 1b of this variant embodiment and... Figure 1 The only difference between the transparent display device 1a and the above-mentioned transparent display device 1b is the arrangement direction of the alignment mark area AMR, and the manufacturing method of the transparent display device 1b can also be applied to it. Figure 1 The transparent display device 1a and the transparent display device of any of the embodiments described below.

[0064] exist Figure 4 In this embodiment, both the first alignment mark M1 and the second alignment mark M2 are disposed within the display area DR. At least one sub-mark of the first alignment mark M1 may be formed by a metal pattern in a metal layer, while the second alignment mark M2 may be formed by a metal pattern in at least one metal layer. In some embodiments, the substrate 12 may have an edge 12S, and the distance in the X direction between one of the first alignment marks M1 (e.g., the first alignment mark M11) and the edge 12S is greater than the distance in the X direction between the second alignment mark M2 and the edge 12S, but this is not a limitation. In some embodiments, the second alignment mark M2 may be disposed in a different unit 14 from the first alignment mark M1 in the top view direction, for example... Figure 12 As shown.

[0065] The shape of the first alignment mark M1 may differ from the shape of the second alignment mark M2. The first alignment mark M1 can be used for the alignment of the photomask, while the second alignment mark M2 can be used for the alignment of different transparent display devices, but is not limited thereto. In some embodiments, the top view shapes of different sub-marks (e.g., the first sub-mark SM1, the second sub-mark SM2, the third sub-mark SM3, and the fourth sub-mark SM4) may be the same or different as required, for example, including rectangles, circles, rings, triangles, or other suitable shapes. The dimensions of the different sub-marks may also be adjusted to be the same or different as required. In some embodiments, the top view shape of the second alignment mark M2 may, for example, include a cross shape or other suitable shapes.

[0066] Please refer to Figure 5 The diagram shown is a top view of a transparent display device according to another variation of the first embodiment of the present invention. The transparent display device 1c of this variation is... Figure 1 The difference in the transparent display device 1a shown is that multiple light-emitting elements can be disposed within the same pixel region PXR. For example, light-emitting elements 16a, 16b, and 16c constituting a pixel can be disposed within the same pixel region PXR, but this is not a limitation. In this case, each first conductor group LS1 can include three first conductors L1, but this is not a limitation. One of the first conductor groups LS1 can be disposed between two adjacent pixel regions PXR in the Y direction, and the three first conductors L1 therein can be electrically connected to light-emitting elements 16a, 16b, and 16c, for example, respectively, via transistors. Furthermore, each second conductor group LS2 can also include three second conductors L2, but this is not a limitation. One of the second conductor groups LS2 can be disposed between two adjacent pixel regions PXR in the X direction, and the three second conductors L2 therein can be electrically connected to light-emitting elements 16a, 16b, and 16c, for example, via transistors. In this embodiment, each unit 14 may include a penetration area TR1, a pixel area PXR, a portion of a first conductor group LS1, and a portion of a second conductor group LS2, but is not limited thereto.

[0067] like Figure 5 As shown, when the transparent display device 1c includes an anti-reflective layer AL, the same pixel portion PP can surround the light-emitting elements 16a, 16b, and 16c, and each first strip portion P1 can cover the corresponding first conductive line group LS1, while each second strip portion P2 can cover the corresponding second conductive line group LS2. Since other parts of the transparent display device 1c in this modified embodiment can be connected to… Figure 1 The implementation methods are the same, so please refer to the above text, and will not be repeated here.

[0068] Please refer to Figure 6 The diagram shown is a top view of a transparent display device according to a second embodiment of the present invention. Figure 6 As shown, the transparent display device 2a provided in this embodiment and Figure 1 One difference in the transparent display device 2a lies in the arrangement of the conductive wire groups and the light-emitting elements. Specifically, the transparent display device 2a may include multiple first conductive wire groups LS1, multiple second conductive wire groups LS2, and multiple third conductive wire groups LS3, wherein the third conductive wire groups LS3 are staggered with the first conductive wire groups LS1. The extension direction of the third conductive wire group LS3 may be, for example, the same as the extension direction of the second conductive wire group LS2, and the second conductive wire groups LS2 and the third conductive wire groups LS3 are arranged alternately in the direction X. Furthermore, two adjacent rows of light-emitting elements may be provided between two adjacent first conductive wire groups LS1, and two adjacent columns of light-emitting elements and a transmission area TR1 may be provided between one third conductive wire group LS3 and one adjacent second conductive wire group LS2, while a transmission area TR2 may be provided between the third conductive wire group LS3 and another adjacent second conductive wire group LS2, but no light-emitting elements are provided there. In this case, the smallest repeating unit 14 may include four pixel regions PXR, a transmissive region TR1, a transmissive region TR2, a portion of a first conductor group LS1, a portion of a second conductor group LS2, and a portion of a third conductor group LS3, wherein the transmissive region TR1 may, for example, be larger than the transmissive region TR2.

[0069] In this embodiment, each first conductor group LS1 may include three first conductors L1, each second conductor group LS2 may be composed of a single second conductor L2, and each third conductor group LS3 may be composed of a single third conductor L3, but is not limited thereto. In some embodiments, when the transparent display device 2a includes an anti-reflective layer AL, each first strip P1 may cover three first conductors L1, and each second strip P2 may cover one second conductor L2 or one third conductor L3. Figure 2 In some embodiments, the first alignment mark M1 may be disposed, for example, within a penetration region TR2, but is not limited thereto. In some embodiments, the first alignment mark M1 may also be disposed within a penetration region TR1, but is not limited thereto. In some embodiments, the antireflective layer AL may selectively include blocky portions (such as...) Figure 1 The block-shaped part SP1 shown is set corresponding to the first alignment mark M1.

[0070] Please refer to Figure 7 The diagram shown is a top view of a transparent display device according to a variation of the second embodiment of the present invention. The transparent display device 2b provided in this embodiment is... Figure 6One difference of the transparent display device 2a is that multiple light-emitting elements can be disposed within the same pixel region PXR. For example, light-emitting elements 16a, 16b, and 16c constituting a pixel are disposed within the same pixel region PXR, but are not limited thereto. In this case, each second conductor group LS2 may include three second conductors L2, but is not limited thereto. In some embodiments, when the transparent display device 2b includes an anti-reflective layer AL, each first strip portion P1 may cover three first conductors L1, and each second strip portion P2 may cover three second conductors L2. In some embodiments, the anti-reflective layer AL may selectively include block portions (such as... Figure 1 The block-shaped part SP1 shown is set corresponding to the first alignment mark M1.

[0071] Please refer to Figure 8 The diagram shown is a top view of a transparent display device according to a third embodiment of the present invention. The transparent display device 3a provided in this embodiment is... Figure 1 One difference in the transparent display device 1a shown is that the arrangement of the first alignment marks M1 can be regular, such as intermittent. In this embodiment, the distance D1 between corresponding portions (e.g., center, upper side, or lower side) of two adjacent first alignment marks M1 arranged in the Y direction can be, for example, 5 times the width of the unit 14 in the Y direction or other suitable multiple, or there can be four units 14 between two adjacent first alignment marks M1 arranged in the Y direction. The distance D2 between corresponding portions (e.g., center, left side, or right side) of two adjacent first alignment marks M1 arranged in the X direction can be, for example, 5 times the width of the unit 14 in the X direction or other suitable multiple, or there can be four units 14 between two adjacent first alignment marks M1 arranged in the X direction.

[0072] In some embodiments, the antireflective layer AL may selectively include blocky portions SP1, corresponding to the first alignment mark M1, and the arrangement of the blocky portions SP1 may be the same as that of the first alignment mark M1. In this case, the antireflective layer AL in the non-alignment mark region NAMR may also include multiple blocky portions SP2, and the blocky portions SP2 have the same arrangement as the blocky portions SP1. Furthermore, the distance D31 between the corresponding portions of a blocky portion SP2 adjacent to the nearest blocky portion SP1 in the X direction and the corresponding portions of a blocky portion SP1 adjacent to the nearest blocky portion SP2 may be, for example, the same as the distance D32 between the corresponding portions of two adjacent blocky portions SP1 in the X direction. This structure helps to reduce the transmittance difference between the alignment mark region AMR and the non-alignment mark region NAMR, thereby improving the visual effect.

[0073] Please refer to Figure 9The diagram shown is a top view of a transparent display device according to a variation of the third embodiment of the present invention. The transparent display device 3b provided in this embodiment is... Figure 8 One difference in the transparent display device 3a shown is that the arrangement of the first wire group, the second wire group, and the light-emitting element can, for example, adopt the following configuration: Figure 6 or Figure 7 The architecture. In this embodiment, the arrangement of the first alignment marks M1 can also be intermittent or periodic, but is not limited to this. For example, the distance between corresponding portions of two adjacent first alignment marks M1 arranged in direction X can be twice the width of unit 14 in direction X or other suitable multiples, and the distance between corresponding portions of two adjacent first alignment marks M1 arranged in direction Y can be twice the width of unit 14 in direction Y or other suitable multiples, but is not limited to this. In some embodiments, the antireflective layer AL may also selectively include block-shaped portions (e.g., Figure 1 The block-shaped portion SP1 shown is configured corresponding to the first alignment mark M1. In some embodiments, Figure 9 The arrangement of the first alignment mark M1 can also be adopted Figure 1 The random arrangement shown. In this case, the antireflective layer AL in the non-aligned marking region NAMR may selectively contain multiple blocky portions SP2, and the blocky portions SP2 have the same arrangement as the blocky portions SP1.

[0074] Please refer to Figure 10 The diagram shown is a top view of a transparent display device according to another variation of the third embodiment of the present invention. The transparent display device 3c provided in this embodiment is... Figure 8 One difference in the transparent display device 3a shown is that the distance D31 between corresponding portions of a block SP2 of the nearest block SP1 and a block SP1 of the nearest block SP2 in direction X can be greater than the distance D32 between corresponding portions of two adjacent block SP1s in direction X, and the distance D33 between corresponding portions of adjacent block SP2s in direction X within the non-alignment marking area NAMR can be greater than the aforementioned distance D31. In other words, the greater the distance from the alignment marking area AMR, the greater the distance between adjacent block portions can be, thereby reducing the difference between the transmittance within the alignment marking area AMR and the transmittance within the non-alignment marking area NAMR adjacent to the alignment marking area AMR, thus improving the visual effect. In some embodiments, Figure 10 Unit 14 can also be, for example, adopted Figure 6 or Figure 7 The architecture.

[0075] Please refer to Figure 11The diagram shown is a top view of a transparent display device according to a fourth embodiment of the present invention. The transparent display device 4 provided in this embodiment is... Figure 1 One difference in the transparent display device 1a is that the non-display area NDR is disposed on three sides of the display area DR. In this embodiment, a portion of the alignment mark area AMR may be located within the non-display area NDR to reduce the impact of the first alignment mark M1 on the visual effect. In other words, a single photomask area MR may include a portion of the non-display area NDR. In this case, when the alignment mark area AMR is located within the non-display area NDR, the structure of the anti-reflective layer AL corresponding to the first alignment mark M1 may, for example, be the same as the structure within the display area DR to improve the alignment effect. In other words, the anti-reflective layer AL may include a first stripe portion P1, a second stripe portion P2, and a pixel portion PP, disposed within the non-display area NDR. Therefore, the number of alignment mark areas AMR within the display area DR can be reduced, thereby improving the visual effect.

[0076] exist Figure 11 In this embodiment, the transparent display device 4 may further include a cutting line CL extending along two adjacent opposite sides of the display area DR and the non-display area NDR, respectively, so that the two sides of the transparent display device 4 can be a frameless display device, but is not limited thereto. In this case, after cutting, at least a portion of the photomask area MR of the transparent display device 4 may contain only one alignment mark area AMR. In some embodiments, the cutting line CL of the transparent display device 4 is not... Figure 11 For limitations, it may also include another cutting line extending along the side where the display area DR and the non-display area NDR are adjacent and the two opposite sides are connected, so that the transparent display device 4 can be a three-sided borderless display device, for example... Figure 12 Display panel 5a or Figure 13 The display panel 5b is shown. In this case, after cutting, a portion of the photomask area MR of the transparent display device 4 may not contain the alignment mark area AMR. In some embodiments, Figure 11 An architecture in which the alignment mark area AMR is located within the non-display area NDR and / or at least part of the photomask area MR, with only one alignment mark area AMR or no alignment mark area AMR, may also be applied to any of the embodiments described above or below.

[0077] The transparent display device may also include at least one second alignment mark (e.g. Figure 4 , Figure 12 or Figure 13The second alignment mark M2 shown allows different transparent display devices to be spliced ​​together to form a spliced ​​display device. The different transparent display devices have adjacent sides, and the second alignment mark of the transparent display devices can be positioned at least adjacent to said sides, so that the second alignment marks of the transparent display devices are adjacent to each other during splicing, facilitating splicing alignment. Embodiments of the spliced ​​display device will be further described below, but are not limited thereto. Please refer to... Figure 12 The diagram shown is a top view of a splicing display device according to a fifth embodiment of the present invention. The splicing display device 51 provided in this embodiment can be formed by splicing multiple display panels 5a. The structure of the display panels 5a within the display area DR in this embodiment can, for example, be similar to... Figure 4 The transparent display device 1b has the same structure within the display area DR, and will not be described in detail here; please refer to the above description. In some embodiments, the display panel 5a may also be replaced by the transparent display device of any of the above embodiments or other suitable display panels. Since the display panel 5a can be a transparent display device, the splicing display device 51 can also be a splicing transparent display device, but is not limited thereto. In this embodiment, the display panel 5a can be spliced ​​together, for example, by means of the second alignment mark M2.

[0078] In this embodiment, the non-display area NDR of the display panel 5a can be disposed on one side of the display area DR, and the display panel 5a can include two second alignment marks M2, respectively adjacent to two sides of the display panel 5a, for example, respectively located at two corners of the display area DR away from the non-display area NDR. Specifically, the display panel 5a can have one side S1, one side S2, and two sides S3, wherein side S1 and side S2 are opposite to each other, side S1 is located in the non-display area NDR and away from the display area DR, and the two sides S3 are opposite to each other and respectively connect side S1 and side S2. Furthermore, the second alignment marks M2 can be respectively located at the corners formed by the two sides S3 and side S2. In this case, the sides S2 of the two display panels 5a can be spliced ​​together opposite each other by the second alignment mark M2 of adjacent sides S2, and the sides S3 of the two display panels 5a can also be spliced ​​side by side by the second alignment mark M2 of adjacent sides S3, so that the splicing display device 51 can be formed by splicing together a 2*2 matrix of display panels 5a. In some embodiments, the number of second alignment marks M2 corresponding to the same splicing side S3 and / or side S2 can also be two or more, and their number and position are not limited by... Figure 12 The figures shown are for illustrative purposes only and can be adjusted as needed. In some embodiments, Figure 12 The second alignment mark M2 or the display panel 5a may also include another second alignment mark M2 disposed at the corner of the display area DR adjacent to the non-display area NDR, that is, the corner adjacent to the side S3 and the non-display area NDR. In some embodiments, Figure 12The second alignment mark M2 or the display panel 5a may also include another second alignment mark M2 disposed at any position on the corner or side S3 adjacent to the display area DR in the non-display area NDR. In some embodiments, Figure 12 The second alignment mark M2 or the display panel 5a may also include another second alignment mark M2 disposed in the alignment mark area adjacent to the side S3 or the side S2 (e.g. Figure 1 , Figure 4 , Figures 8 to 11 The alignment mark area (AMR) is shown.

[0079] exist Figure 12 In this configuration, the second alignment mark M2 may, for example, overlap with the first guide wire group LS1 and the second guide wire group LS2 to reduce the impact of the second alignment mark M2 on the visual effect of the splicing display device 51. Specifically, after the four display panels 5a are spliced ​​together, there will be four second alignment marks M2 adjacent to each other. Therefore, by overlapping the second alignment mark M2 with the first guide wire group LS1 and the second guide wire group LS2, the visibility of the second alignment mark M2 can be reduced. The second alignment mark may, for example, be disposed within one of the units 14 in the Z direction, but is not limited thereto. In some embodiments, the anti-reflective layer AL may overlap with the second alignment mark M2. In some embodiments, the second alignment mark M2 may also not overlap with the first guide wire group LS1 and the second guide wire group LS2.

[0080] This embodiment further provides a method for manufacturing a splicing display device 51, which includes providing a plurality of display panels 5a and splicing the display panels 5a by means of a second alignment mark M2 for each display panel 5a. Since each display panel 5a can employ a transparent display device of any of the above embodiments, the manufacturing method of each display panel 5a can be referred to above. It should be noted that since the second alignment mark M2 can be formed, for example, by a metal layer adjacent to the substrate, the second alignment mark M2 can be detected from the side of the substrate opposite to the second alignment mark M2 to align and splice the display panels 5a.

[0081] Please refer to Figure 13 The diagram shown is a top view of a splicing display device according to a variation of the fifth embodiment of the present invention. The splicing display device 52 provided in this variation is... Figure 12 The difference between the splicing display device 51 and the previous one is that the display panel 5b may include a second alignment mark M21, located near the center of the side S2 and away from the corner of the display panel 5b, to reduce the impact of the second alignment mark M21 on the visual effect of the splicing display device 52. In some embodiments, the number of second alignment marks M2 corresponding to the same splicing side S2 and / or side S3 may be two or more. In some embodiments, the display panel 5b may also be replaced by a transparent display device of any of the above embodiments or other suitable display panels.

[0082] exist Figure 13 In this embodiment, each display panel 5b may further include two second alignment marks M22, located at the corners of the non-display area NDR adjacent to the side edge S3, so that the second alignment marks M22 can be used to splice the sides S3 of the two display panels 5b side by side. Other parts of the splicing display device and its manufacturing method in this variation embodiment are comparable to... Figure 12 The embodiments are the same, so please refer to the above description, and will not be repeated here. In some embodiments, Figure 13 The second alignment mark M21 and / or the second alignment mark M22 can also be combined Figure 12 The second alignment notation M2, in other words... Figure 13 The display panel 5b may also include Figure 12 The second alignment notation is M2.

[0083] In summary, in the transparent display device of the present invention, the impact of the first alignment mark on the visual effect can be reduced by setting the first alignment mark within a single unit, by arranging the first alignment mark randomly or regularly, by overlapping the first alignment mark with an anti-reflective layer, or by placing a portion of the alignment mark area within a non-display area. Furthermore, the configuration of the second alignment mark described above can help reduce the impact of the second alignment mark on the visual effect of the splicing display device.

[0084] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A transparent display device, characterized by, Include: A substrate having a display area; A plurality of units are disposed within the display area and repeatedly arranged along a first direction and a second direction, wherein each of the plurality of units includes at least one pixel area and at least one transmissive area, and each of the plurality of units includes at least one light-emitting element corresponding to the at least one pixel area; and A first alignment mark is disposed in the display area, and the first alignment mark is formed by at least two pattern layers, wherein at least one of the at least two pattern layers contains metal, and in a top view, the first alignment mark is disposed in one of the plurality of cells. 2.The transparent display device of claim 1, wherein, It also includes a second alignment mark disposed within the display area and formed by at least one metal layer, wherein the substrate has an edge, and the distance between the first alignment mark and the edge in the first direction is greater than the distance between the second alignment mark and the edge in the first direction. 3.The transparent display device of claim 1, wherein, It also includes another first alignment mark, disposed in the display area, and formed by at least two pattern layers, wherein at least one of the at least two pattern layers of the first alignment mark is different from the at least two pattern layers of the other first alignment mark. 4.The transparent display device of claim 1, wherein, It also includes an anti-reflective layer disposed on the substrate and overlapping the first alignment mark.

5. The transparent display device according to claim 1, characterized in that, The area of ​​the first alignment mark is less than or equal to 50% of the area of ​​one of the plurality of units.

6. The transparent display device according to claim 1, characterized in that, The at least two patterned layers of the first alignment mark each contain metal.

7. The transparent display device according to claim 1, characterized in that, The other of the at least two patterned layers of the first alignment mark contains an insulating material.

8. A method for manufacturing a splicing display device, characterized in that, Include: A first display panel and a second display panel are provided, wherein a method for manufacturing each of the first display panel and the second display panel includes: A substrate is provided, wherein the substrate has a display area; Multiple first alignment marks are formed within the display area, wherein forming the multiple first alignment marks includes: Multiple first sub-marks are formed on the substrate; Provide multiple photomasks, and stitch the multiple photomasks together using the multiple first sub-marks; and Multiple second sub-signatures are formed on the multiple first sub-signatures; as well as At least one second alignment mark is formed on the substrate; and The first display panel and the second display panel are spliced ​​together by the at least one second alignment mark of the first display panel and the at least one second alignment mark of the second display panel.

9. The method for manufacturing the splicing display device according to claim 8, characterized in that, The manufacturing method of each of the first display panel and the second display panel further includes forming an anti-reflective layer on the plurality of first alignment marks after forming a plurality of first alignment marks.

10. The method for manufacturing the splicing display device according to claim 8, characterized in that, The formation of the plurality of first alignment marks further includes, after the formation of the plurality of second sub-marks, the formation of a plurality of third sub-marks, wherein one of the plurality of first alignment marks is formed by at least two of one of the plurality of first sub-marks, one of the plurality of second sub-marks, and one of the plurality of third sub-marks.

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