CN111833758A

CN111833758A - Tiled display device

Info

Publication number: CN111833758A
Application number: CN201911100379.2A
Authority: CN
Inventors: 萧宇瑄
Original assignee: Innolux Corp
Current assignee: Innolux Corp
Priority date: 2019-04-18
Filing date: 2019-11-12
Publication date: 2020-10-27
Anticipated expiration: 2039-11-12
Also published as: CN111833758B

Abstract

The invention provides a splicing display device, comprising: the display device comprises a main supporting substrate, a first display substrate and a second display substrate. The first display substrate is arranged on the main supporting substrate, and the second display substrate is arranged on the main supporting substrate and is adjacent to the first display substrate. And the main supporting substrate comprises a light reflection inhibiting structure, and in the upward viewing direction of the spliced display device, the light reflection inhibiting structure is overlapped with the gap between the first display substrate and the second display substrate.

Description

Tiled display device

Technical Field

The present invention relates to a tiled display device, and more particularly, to a tiled display device having an optical structure.

Background

Electronic products including display panels, such as smart phones, tablet computers, notebook computers, monitors and televisions, have become indispensable necessities of modern society. With the explosion of such portable electronic products, consumers have a high expectation on the quality, functionality, or price of these products.

Sub-millimeter light emitting diode (mini LED) and micro LED (micro LED) technologies are emerging as flat panel display technologies in recent years, which can produce seamless images with wide viewing angle, high brightness, and high contrast. However, when the sub-millimeter led and micro led technologies are applied to a large-sized display panel, they are mostly achieved by using a splicing method. As the resolution requirements increase, the pitch of the leds decreases, thereby limiting the space available at the panel splice joint.

While existing tiled display devices can generally meet their intended purpose, they have not been completely satisfactory in every aspect. Therefore, developing a structure design that can improve the quality or reliability of the tiled display device is still one of the issues of the current industry.

Disclosure of Invention

According to some embodiments of the present invention, there is provided a tiled display device, comprising: the display device comprises a main supporting substrate, a first display substrate and a second display substrate. The first display substrate is arranged on the main supporting substrate, and the second display substrate is arranged on the main supporting substrate and is adjacent to the first display substrate. And the main supporting substrate comprises a light reflection inhibiting structure, and in the upward viewing direction of the spliced display device, the light reflection inhibiting structure is overlapped with the gap between the first display substrate and the second display substrate.

Drawings

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:

FIG. 1 is a schematic top view of a tiled display apparatus according to some embodiments of the invention;

FIGS. 2-9 illustrate schematic cross-sectional views along section line A-A' of FIG. 1 according to some embodiments of the present invention;

FIG. 10 is a schematic diagram of a main support substrate of a tiled display according to some embodiments of the invention.

Description of the symbols

A 100R optical structure;

100R_Aa first portion;

100R_Ba second portion;

102 primarily supporting a substrate;

102A first sub-support substrate;

102B a second sub-support substrate;

102b bottom surface;

102s, 102 s' side surfaces;

102t top surface;

200 display elements;

202A a first display substrate;

202As, 202Bs side surfaces;

202B a second display substrate;

204 a circuit layer;

206 display layer;

302 a bonding layer;

A-A' section line;

d₁、d₂a distance;

a GP gap;

P₁、P₂、P₃、P₁’、P₂’、P₃' end point;

t thickness;

θ₁、θ₂and (4) an included angle.

Detailed Description

The following describes the tiled display device and the manufacturing method thereof according to the embodiment of the present invention in detail. It is to be understood that the following description provides many different embodiments, or examples, for implementing different aspects of the invention. The specific elements and arrangements described below are merely illustrative of some embodiments of the invention for simplicity and clarity. These are, of course, merely examples and are not intended to be limiting. Moreover, similar and/or corresponding elements may be labeled with similar and/or corresponding reference numerals in different embodiments in order to clearly describe the invention. However, the use of such like and/or corresponding reference numerals is merely for simplicity and clarity in describing some embodiments of the invention and does not represent any correlation between the various embodiments and/or structures discussed.

It should be understood that the elements of the drawings or devices may take various forms well known to those skilled in the art to which the invention pertains. In addition, relative terms, such as "lower" or "bottom" or "upper" or "top," may be used in relation to one element of the figures to describe the relative relationship of one element to another. It will be understood that if the device of the drawings is turned over with its top and bottom portions reversed, the elements described as being on the "lower" side will be turned over to those on the "higher" side. The embodiments of the present invention can be understood together with the accompanying drawings, which are also to be considered part of the description of the invention. It is to be understood that the drawings of the present invention are not to scale and that in fact any enlargement or reduction of the dimensions of the elements is possible in order to clearly show the nature of the invention.

Furthermore, when a first material layer is disposed on or above a second material layer, the first material layer and the second material layer are in direct contact. Alternatively, one or more layers of other materials may be present, in which case there may not be direct contact between the first and second layers of material.

Furthermore, the elements or devices of the drawings may exist in various forms well known to those skilled in the art to which the invention pertains. Further, it should be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, or sections, these elements, components, or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

As used herein, the term "substantially" generally means within 20%, or within 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of a given value or range. The quantities given herein are approximate quantities, that is, the meaning of "substantially" may be implied without specifically stating "substantially".

In some embodiments of the present invention, terms concerning bonding, connecting, such as "connected," "interconnected," and the like, may refer to two structures as being in direct contact, or alternatively, may refer to two structures as being not in direct contact, unless otherwise specified, with other structures being interposed between the two structures. And the terms coupled and connected should also be construed to include both structures being movable or both structures being fixed.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

According to some embodiments of the present invention, a tiled display device is provided that includes an optical structure that can alter the path of light or reduce the intensity of light reflection. In some embodiments, the optical structure may be, for example, a light reflection reducing structure (light reflection reducing structure), which reduces the reflection light generated by the ambient light at the display joint and reduces the interference of the ambient light on the image quality of the display, for example. The term "light reflection suppression" as used herein refers to that the spectrum integral value of the reflected light of the light source (which may be, for example, ambient light) is smaller than the spectrum integral value of the incident light, and in some embodiments, the light source may include visible light (for example, the wavelength is between 380nm and 780 nm) or ultraviolet light (for example, the wavelength is less than 365nm), but is not limited thereto, that is, when the light source is visible light, the spectrum integral value of the reflected light in the range from 380nm to 780nm is smaller than the spectrum integral value of the incident light in the same range.

Referring to fig. 1, fig. 1 is a schematic top view of a tiled display apparatus 10 according to some embodiments of the invention. It should be understood that only some of the elements of the tiled display arrangement 10 are shown in FIG. 1 for clarity of illustration. Again, according to some embodiments, additional features may be added to the tiled display device 10 described below. In other embodiments, some of the features of the tiled display arrangement 10 described below can be replaced or omitted.

As shown in fig. 1, according to some embodiments, the tiled display device 10 can include a plurality of display units 100, the display units 100 being arranged adjacent to each other. In some embodiments, the display unit 100 may include a main support substrate 102 and a display device 200, and the display device 200 may be disposed on the main support substrate 102. In some embodiments, the size of the main supporting substrate 102 may be larger than the size of the display element 200 (e.g., fig. 2, the

display substrate

202A or 202B), for example, at least a portion of the main supporting substrate 102 protrudes from the display element 200 when viewed from the top of the tiled display apparatus 10, for example, four sides of the main supporting substrate 102 may protrude from the display element 200 along the X direction or the Y direction in the figure, and the main supporting substrate 102 may serve as a main substrate for interconnecting the display units 100. In some embodiments, since the size of the main support substrates 102 is larger than the size of the display element 200, the spliced portion TP between the main support substrates 102 may not be covered by the display element 200, and thus, ambient light may be irradiated to the spliced portion TP.

Referring to fig. 2, fig. 2 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to some embodiments of the present invention. It should be understood that the two sectional lines A-A' in FIG. 1 may correspond to the sectional structure shown in FIG. 2, as well as the following FIGS. 3-9. As shown in fig. 2, in some embodiments, the tiled display device 10 can include a main support substrate 102 and a plurality of display elements 200, the display elements 200 can be disposed on the main support substrate 102.

In some embodiments, the display element 200 may include a Liquid Crystal Display (LCD) device, a light-emitting diode (LED) device, a quantum dot device, a fluorescent (fluorescent) device, a phosphorescent (phosphor) device, a device with other suitable display media, or a combination of the foregoing, but is not limited thereto. According to some embodiments, the LED display device may include, for example, an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a sub-millimeter light-emitting diode (mini LED), a micro LED, or a combination thereof, but is not limited thereto.

Furthermore, in some embodiments, the tiled display device 10 can further include a bonding layer 302 disposed between the primary support substrate 102 and the display element 200. In some embodiments, the bonding layer 302 may include an adhesive material, a mechanical securing element, or a combination of the foregoing, but is not limited thereto.

As shown in fig. 2, in some embodiments, the display device 200 may include a display substrate (

display substrate

202A or 202B), a circuit layer 204, and a display layer 206. In some embodiments, the circuit layer 204 and the display layer 206 may be disposed on a display substrate, and the circuit layer 204 may be disposed between the display substrate and the display layer 206.

It should be understood that the embodiments shown in the figures of the present invention are illustrated with sub-millimeter leds or micro leds as the display elements 200, but according to some embodiments of the present invention, the display elements 200 may be any one of the display elements described above or a combination thereof. In addition, the structure of the display device 200 may exist in various forms known to those skilled in the art, and thus, will not be described herein.

In addition, for clarity of illustration of the position relationship between the display substrates of the different display elements 200 and the main supporting substrate 102, the display substrates of the different display elements 200 are further denoted as a first display substrate 202A and a second display substrate 202B. As shown in fig. 2, in some embodiments, a first display substrate 202A and a second display substrate 202B may be disposed on the main support substrate 102, and the second display substrate 202B may be adjacent to the first display substrate 202A.

In some embodiments, the first display substrate 202A and the second display substrate 202B have a gap GP therebetween, and the gap GP may be located in the splicing portion TP. According to some embodiments, the gap GP refers to a minimum distance between the side surface 202As of the first display substrate 202A and the side surface 202Bs of the second display substrate 202B.

Notably, the primary support substrate 102 includes an optical structure 100R. In some embodiments, the optical structure 100R at least partially overlaps the gap GP between the first display substrate 202A and the second display substrate 202B in a top view direction (e.g., the Z direction shown in the figures) of the tiled display device 10. According to some embodiments, the optical structure 100R can reduce the ambient light (e.g., the light L shown in the figure) from generating reflected light at the gap GP (i.e., the tiled portion TP of the display). In detail, according to some embodiments, the optical structure 100R may reduce the generation of the reflected light passing through the gap GP, thereby reducing the risk of generating bright lines at the gap GP, which may interfere with the image quality.

Specifically, the optical structure 100R is a structure that can reduce the intensity of reflected light. In some embodiments, a structure that reduces the intensity of a sub-band of reflected light may also be used as the optical structure 100R.

As shown in fig. 2, in some embodiments, the optical structure 100R is located in an upper portion (upper portion) of the primary support substrate 102. In some embodiments, the optical structure 100R may include a recessed structure. In some embodiments, the main support substrate 102 includes a top surface 102t and a side surface 102s connected to the top surface 102t, and the side surface 102s is not perpendicular to the top surface 102t, such that the side surface 102s can be a part of the optical structure 100R. Specifically, since the side surface 102s and the top surface 102t of the main supporting substrate 102 are not perpendicular (i.e., the main supporting substrate 102 has a portion of an inclined surface), the reflected light generated after the light L reaches the main supporting substrate 102 can be effectively reduced.

Further, the side surface 102s of the main support substrate 102 is a side surface at least partially overlapping with the gap GP in the upward-viewing direction (for example, Z direction). In some embodiments, the top surface 102t and the side surface 102s of the primary support substrate 102 have an included angle θ therebetween₁. In some embodiments, the included angle θ₁Can be more than 135 degrees and less than 180 degrees (135 degrees)<Included angle theta₁<180 degrees), or greater than 140 degrees and less than 170 degrees, such as, but not limited to, 145 degrees, 150 degrees, 155 degrees, 160 degrees, or 165 degrees. In some embodiments, the included angle θ₁Can be larger than 90 degrees and smaller than 135 degrees (90 degrees)<Included angle theta₁<135 degrees) without limitation.

In detail, according to some embodiments, the included angle θ₁Refers to the endpoint P on the top surface 102t of the primary support substrate 102₁And the end point P₂(e.g. in a cross-sectional structure)Two endpoints or inflection points of the top surface 102 t), and an endpoint P), respectively₁And another end point P on the side surface 102s₃(e.g., the end point or inflection point of the side surface 102s in a cross-sectional structure).

As shown in fig. 2, in some embodiments, the lower portion (lower portion) of the primary support substrate 102 may also include a recessed structure. In some embodiments, the primary support substrate 102 includes a bottom surface 102b and a side surface 102s 'connected to the bottom surface 102b, and the side surface 102 s' is not perpendicular to the bottom surface 102 b. According to some embodiments, the main support substrate 102 has a recessed structure at a lower portion, thereby improving the efficiency of the subsequent assembly process of the tiled display device 10.

In some embodiments, the side surface 102 s' of the primary support substrate 102 is a side surface that at least partially overlaps the gap GP. In some embodiments, the bottom surface 102b of the primary support substrate 102 and the side surface 102 s' have an included angle θ therebetween₂. In some embodiments, the included angle θ₂May range from greater than 90 degrees to less than 180 degrees (90 degrees)<Included angle theta₂<180 degrees). In some embodiments, the included angle θ₂May be equal to 90 degrees. In addition, the angle θ₁Can form an included angle theta₂The same or different.

According to some embodiments, the included angle θ₂Refers to the end point P on the bottom surface 102b of the primary support substrate 102₁' with endpoint P₂' (e.g., two endpoints or inflection points of the bottom surface 102b in a cross-sectional structure), and an endpoint P₁' with another end point P on the side surface 102s₃' (e.g., the end or inflection point of the side surface 102s ' in a cross-sectional structure, and also the end or inflection point of the side surface 102s ' connected to the side surface 102 AS) of the substrate).

In addition, according to the embodiment of the present invention, the included angle θ can be measured by using an Optical Microscope (OM), a Scanning Electron Microscope (SEM), an angle gauge, or other suitable methods₁And angle theta₂However, the present invention is not limited thereto. In detail, in some embodiments, a cross-sectional image of the structure may be obtained using a scanning electron microscope, and an angle measuring instrument may be used to measure the included angle θ₁And angle theta₂。

In addition, the primary support substrate 102 may include a flexible substrate or an inflexible substrate. In some embodiments, the material of the primary support substrate 102 may include, but is not limited to, metal, plastic, glass, quartz, sapphire, ceramic, carbon fiber, other suitable substrate materials, or combinations thereof. In some embodiments, the material of the aforementioned metal may include, but is not limited to, aluminum (Al), copper (Cu), molybdenum (Mo), silver (Ag), tin (Sn), tungsten (W), gold (Au), chromium (Cr), nickel (Ni), platinum (Pt), aluminum alloy, copper alloy, molybdenum alloy, silver alloy, tin alloy, tungsten alloy, gold alloy, chromium alloy, nickel alloy, platinum alloy, other suitable metallic materials, or a combination of the foregoing. In some embodiments, the plastic material may include Polyimide (PI), polyethylene terephthalate (PET), Polycarbonate (PC), other suitable materials, or combinations thereof, but is not limited thereto. Further, in some embodiments, the primary support substrate 102 may comprise a metal-glass fiber composite sheet, or a metal-ceramic composite sheet, but is not limited thereto.

Furthermore, the primary support substrate 102 may have a thickness T. In some embodiments, the thickness T of the primary support substrate 102 may range from 500 micrometers (μm) to 5 millimeters (mm) (500 μm < thickness T < 5mm), or from 1 mm to 4 mm, such as, but not limited to, 1.5 mm, 2 mm, 2.5 mm, 3mm, or 3.5 mm. It should be understood that the thickness T may have other suitable ranges according to different types of display devices, and the present invention is not limited thereto.

According to some embodiments, the thickness T of the primary support substrate 102 refers to a maximum thickness of the primary support substrate 102 in a direction normal to the bottom surface 102b of the primary support substrate 102 (e.g., the Z direction shown in the figures). Furthermore, it should be understood that if the thickness T of the primary support substrate 102 is too thin (e.g., less than 500 μm), sufficient support may not be provided.

According to the embodiments of the present invention, the thickness, length, or distance between the elements may be measured using an Optical Microscope (OM), a Scanning Electron Microscope (SEM), a thin film thickness profile (α -step), an ellipsometer, or other suitable methods, but the present invention is not limited thereto. In particular, in some embodiments, a cross-sectional image of the structure may be taken using a scanning electron microscope, and the thickness, width, or distance between elements in the image may be measured using a suitable instrument.

In addition, in some embodiments, the material of the display substrate 202 (the first display substrate 202A and the second display substrate 202B) may include, but is not limited to, plastic, glass, quartz, sapphire, ceramic, carbon fiber, other suitable substrate materials, or a combination thereof. In some embodiments, the plastic material may include Polyimide (PI), polyethylene terephthalate (PET), Polycarbonate (PC), other suitable materials, or combinations thereof, but is not limited thereto. Further, in some embodiments, the display substrate 202 may comprise a metal-glass fiber composite sheet, or a metal-ceramic composite sheet, but is not limited thereto. In addition, the material of the main support substrate 102 may be the same as or different from the material of the display substrate 202.

Furthermore, in some embodiments, a grinding process, a lapping process, a polishing process, a milling process, or a combination thereof may be performed on the main supporting substrate 102 to form the optical structure 100R. In other embodiments, the main supporting substrate 102 with the optical structure 100R may be formed by using a mold and injection molding, but is not limited thereto.

Referring to fig. 3, fig. 3 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present invention. It should be understood that the same or similar components or elements are denoted by the same or similar reference numerals, and the same or similar materials, manufacturing methods and functions are the same or similar to those described above, so that the detailed description thereof will not be repeated.

As shown in fig. 3, the main support substrate 102 may include a plurality of sub-support substrates, according to some embodiments. For example, in some embodiments, the main support substrate 102 may include a first sub-support substrate 102A and a second sub-support substrate 102B, the first display substrate 202A may be disposed on the first sub-support substrate 102A, and the second display substrate 202B may be disposed on the second sub-support substrate 102B.

In some embodiments, the optical structure 100R of the tiled display device 10 can include a first portion 100R_AAnd a second portion 100R_BAnd a first portion 100R_AMay be a portion of the first sub-support substrate 102A, the second portion 100R_BMay be part of the second sub-support substrate 102B. Further, in a top view direction (e.g., the Z direction shown in the figure) of the tiled display apparatus 10, the first portion 100R of the optical structure 100R_AAnd a second portion 100R_BAlso at least partially overlapping the gap GP.

In some embodiments, the first portion 100R_AA second portion 100R on the upper portion of the first sub-support substrate 102A_BIs located at an upper portion of the second sub-support substrate 102B. In some embodiments, the first portion 100R of the optical structure 100R_AAnd a second portion 100R_BMay include a chamfered (chamfer) structure.

Specifically, the first sub-supporting substrate 102A and the second sub-supporting substrate 102B may each include a top surface 102t and a side surface 102s connected to the top surface 102t, and the side surface 102s is not perpendicular to the top surface 102t, such that the side surfaces 102s may be respectively used as the first portion 100R of the optical structure 100R_AAnd a second portion 100R_B. As described above, since the side surfaces 102s and the top surfaces 102t of the first sub-support substrate 102A and the second sub-support substrate 102B are not perpendicular (including the chamfer structure), the reflected light generated after the light L reaches the first sub-support substrate 102A and the second sub-support substrate 102B can be effectively reduced.

Further, the foregoingThe side surfaces 102s of the first sub-support substrate 102A and the second sub-support substrate 102B are side surfaces at least partially overlapping the gap GP. In some embodiments, the top surface 102t and the side surface 102s of the first sub-support substrate 102A and the second sub-support substrate 102B respectively have an included angle θ₁. In some embodiments, the included angle θ₁Can be more than 135 degrees and less than 180 degrees (135 degrees)<Included angle theta₁<180 degrees), or greater than 140 degrees and less than 170 degrees, such as, but not limited to, 145 degrees, 150 degrees, 155 degrees, 160 degrees, or 165 degrees.

In detail, according to some embodiments, the included angle θ₁Refer to the end points P on the top surfaces 102t of the first and second

sub-support substrates

102A and 102B₁And the end point P₂(e.g., two endpoints or inflection points of the top surface 102t in a cross-sectional structure), and an endpoint P₁And another end point P on the side surface 102s₃(e.g., the end point or inflection point of the side surface 102s in a cross-sectional structure, and also the end point or inflection point of the side surface 102s connected to the side surface 102AS, for example) is formed by an angle.

Furthermore, as shown in fig. 3, in some embodiments, the lower portion of the first sub-support substrate 102A and/or the second sub-support substrate 102B may also have a chamfered structure. In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B each include a bottom surface 102B and a side surface 102s 'connected to the bottom surface 102B, and the side surface 102 s' is not perpendicular to the bottom surface 102B. According to some embodiments, the first sub-supporting substrate 102A and the second sub-supporting substrate 102B have a chamfered structure at a lower portion, thereby improving the efficiency of the subsequent assembly process of the tiled display device 10.

In some embodiments, the side surfaces 102 s' of the first and second

sub-support substrates

102A and 102B are side surfaces at least partially overlapping the gap GP. In some embodiments, the bottom surface 102B and the side surface 102 s' of the first sub-supporting substrate 102A and the second sub-supporting substrate 102B respectively have an included angle θ₂. In some embodiments, the included angle θ₂May be greater than 90 degreesAnd less than 180 degrees (90 degrees)<Included angle theta₂<180 degrees). In some embodiments, the included angle θ₂May be equal to 90 degrees (i.e., no chamfer). In addition, the angle θ₁Can form an included angle theta₂The same or different.

According to some embodiments, the included angle θ₂Refer to the end points P on the bottom surfaces 102B of the first and second

sub-supporting substrates

102A and 102B₁' with endpoint P₂' (e.g., two endpoints or inflection points of the bottom surface 102b in a cross-sectional structure), and an endpoint P₁' with another end point P on the side surface 102s₃' (e.g., the end or inflection point of the side surface 102s ' in a cross-sectional structure, and also the end or inflection point of the side surface 102s ' connected to the side surface 102 AS) of the substrate).

As shown in fig. 3, in some embodiments, the first sub-supporting substrate 102A may have another side surface 102As, the second sub-supporting substrate 102B may have another side surface 102Bs, and the side surface 102As is disposed opposite to the side surface 102 Bs. In addition, the side surfaces 102As and 102Bs also at least partially overlap the gap GP.

In some embodiments, the side surface 102As of the first sub-supporting substrate 102A and the side surface 202As of the first display substrate 202A may be separated by a distance d₁That is, the side surface 102As of the first sub-support substrate 102A protrudes by a distance d compared to the side surface 202As of the first display substrate 202A₁. In some embodiments, an outer surface (a surface opposite to the side surface 102As, not labeled) of the first sub-support substrate 102A may also protrude a distance compared to an outer surface (a surface opposite to the side surface 202As, not labeled) of the first display substrate 202A. In some embodiments, the side surface 102Bs of the second sub-supporting substrate 102B and the side surface 202Bs of the second display substrate 202B may be separated by a distance d₁That is, the side surface 102Bs of the second sub-supporting substrate 102B protrudes by a distance d compared to the side surface 202Bs of the second display substrate 202B₁. In some embodiments, distance d₁Less than the pixel pitch (pixel pitch) of the light emitting cells (not shown) in the display element 200) Is one half (i.e., d)₁<1/2 pixel pitch), so that the light-emitting unit can maintain a consistent pixel pitch at the gap GP (the splice), reducing the gap feeling at the gap GP when viewed by the user, and improving the display quality.

Specifically, in some embodiments, distance d₁Can range from 10 μm to 300 μm (10 μm ≦ distance d₁≦ 3mm), between 50 μm and 250 μm, or between 100 μm and 200 μm. However, it should be understood that the distance d may be different according to different types of display devices₁May have other suitable ranges and the invention is not limited thereto.

According to some embodiments, the distance d₁That is, the vertical direction (for example, the X direction shown in the figure) of the tiled display apparatus 10 can be, for example, the Z direction in the cross-sectional view (for example, fig. 3), the minimum distance between the side surface 102As of the first sub-support substrate 102A and the side surface 202As of the first display substrate 202A, or the minimum distance between the side surface 102Bs of the second sub-support substrate 102B and the side surface 202Bs of the second display substrate 202B. In some embodiments, the distance d of the first sub-support substrate 102A₁Distance d from the second sub-support substrate 102B₁May be the same or different.

In addition, in some embodiments, the first sub-supporting substrate 102A and the second sub-supporting substrate 102B may be separated by a distance d₂And a distance d₂Is smaller than the gap GP between the first display substrate 202A and the second display substrate 202B. In some embodiments, distance d₂May be close to 0, i.e. the first sub-support substrate 102A is relatively close to the second sub-support substrate 102B. In some embodiments, distance d₂May approach or equal to 0, i.e., the first sub-support substrate 102A may contact the second sub-support substrate 102B. When the distance d₂Being smaller than the gap GP, the risk of collision fracture due to too close proximity between the display elements 200 may be reduced during assembly.

According to some embodiments, the distance d₂That is, in a direction perpendicular to the upward viewing direction of the tiled display apparatus 10 (e.g., in the X direction shown in the figure), the upward viewing directionThe minimum distance between the side surface 102As of the first sub-support substrate 102A and the side surface 102Bs of the second sub-support substrate 102B in the Z direction, which may be, for example, a cross-sectional view (e.g., fig. 3).

Referring to fig. 4, fig. 4 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present invention. As shown in fig. 4, in some embodiments, an included angle θ between the top surface 102t and the side surface 102s of the first sub-support substrate 102A and the second sub-support substrate 102B₁Can be larger than 90 degrees and smaller than 135 degrees (90 degrees)<Included angle theta₁<135 degrees), or greater than 100 degrees and less than 120 degrees, such as, but not limited to, 95 degrees, 100 degrees, 105 degrees, 110 degrees, or 115 degrees.

Similarly, as shown in FIG. 4, in some embodiments, optical structure 100R may include a first portion 100R_AAnd a second portion 100R_B First part 100R_AAnd a second portion 100R_BMay be respectively located at upper portions of the first sub-support substrate 102A and the second sub-support substrate 102B. In addition, in this embodiment, the side surfaces 102s and the top surfaces 102t of the first sub-support substrate 102A and the second sub-support substrate 102B are not perpendicular (including the chamfer structure), so that the reflected light generated after the light L reaches the first sub-support substrate 102A and the second sub-support substrate 102B can be effectively reduced, thereby reducing the risk of generating bright lines at the gap GP and further reducing the image quality.

Furthermore, in some embodiments, the top surface 102t and the other side surface 102st (the side surface located at the outer side) of the first sub-support substrate 102A may have an included angle θ therebetween₁'. In some embodiments, the included angle θ₁' may form an included angle theta₁The same or different. According to some embodiments, the included angle θ of the second sub-support substrate 102B₁' and angle theta₁May also have the above-mentioned relationship.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present disclosure. As shown in fig. 5, in some embodiments, the side surfaces 102s of the first sub-supporting substrate 102A and the second sub-supporting substrate 102B may include curved surface portions RC. In detail, in some embodiments, the curved surface portion RC of the side surface 102s may have a radius of curvature r. The curved portion is a portion that begins to be substantially non-parallel to the top surface 102t to a portion that begins to be substantially non-parallel to a side surface (e.g., the side surface 102As or the side surface 102 Bs). In some embodiments, the radius of curvature r may be greater than or equal to the distance d between the side surface 102As of the first sub-support substrate 102A and the side surface 202As of the first display substrate 202A₁And the radius of curvature r may be less than or equal to the thickness T (i.e., d) of the first sub-support substrate 102A and the second sub-support substrate 102B₁Radius of curvature r ≦ T).

In some embodiments, the radius of curvature r refers to an endpoint P on the top surface 102t of the first sub-support substrate 102A₁And another end point P on the side surface 102s₃Curve in between (e.g., end point P in a cross-sectional structure)₁And an endpoint P₃) The radius of curvature of (a). In detail, in this embodiment, the endpoint P₁Substantially may be the end point on the top surface 102t where the curvature begins to be other than 0, end point P₃Substantially may be the end point on the side surface 102s where the curvature begins to be other than 0.

In this embodiment, the side surfaces 102s and the top surface 102t of the first sub-support substrate 102A and the second sub-support substrate 102B are not perpendicular (including the curved portion RC), so that the reflected light generated after the light L reaches the first sub-support substrate 102A and the second sub-support substrate 102B can be effectively reduced, thereby reducing the risk of generating bright lines at the gap GP and further interfering with the image quality.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present disclosure. As shown in fig. 6, the tiled display apparatus 10 can be a curved tiled display (curved display), according to some embodiments. In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B may be curved. In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B may have a fixed curvature.

In some embodiments, the first sub-supporting substrate 102A and the second sub-supporting substrateThe panels 102B are tiled to form a concave display structure. For example, the end point P on the top surface 102t of the first sub-support substrate 102A₂Is higher than the end point P₁Is measured. In addition, in this embodiment, the included angle θ₁Refers to the top surface 102t of the first sub-support substrate 102A at the end point P₁Tangent line L of₁I.e., a tangent to the top surface 102t passing through the end point P1, and the side surface 102 s. Similarly, in this embodiment, the included angle θ₂That is, the bottom surface 102b of the first sub-supporting substrate 102A is located at the end point P₁' tangent line L₁'the angle formed with the side surface 102 s'. Furthermore, according to some embodiments, the included angle θ of the second sub-supporting substrate 102B₁And angle theta₂Can also be defined in the manner described above.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present disclosure. As shown in fig. 7, the tiled display apparatus 10 can be a curved tiled display, according to some embodiments. In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B may be curved. In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B may have a fixed curvature.

In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B are joined to form a convex display structure. In addition, in this embodiment, the included angle θ₁And angle theta₂The definition of (a) is the same as that described in the embodiment shown in fig. 6, and is not repeated here.

Referring to fig. 8, fig. 8 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present disclosure. As shown in FIG. 8, according to some embodiments, a first portion 100R of an optical structure 100R_AAnd a second portion 100R_BA cover layer 110 may be included, the cover layer 110 may be used to absorb a portion of the light, and in some embodiments, the cover layer 110 may have a darker color and be a darker layer. In other words, in some embodiments, portions of the first sub-support substrate 102A and the second sub-support substrate 102BThe top surface 102t and a portion of the side surfaces 102As and 102Bs may have a cover layer 110 thereon, and the cover layer 110 overlaps the gap GP in a top view direction (e.g., a Z direction shown in the figure) of the tiled display apparatus 10. In other embodiments, the cover layer 110 may substantially completely cover the first sub-supporting substrate 102A and the second sub-supporting substrate 102B. The covering layer 110 can absorb part of the light to reduce the reflection light generated at the gap GP.

Furthermore, in some embodiments, the included angle θ between the top surface 102t and the side surface 102As of the first sub-support substrate 102A₁Substantially 90 degrees or 135 degrees, and the first sub-supporting substrate 102A and the second sub-supporting substrate 102B have the covering layer 110 on a portion of the top surface 102t and a portion of the side surfaces 102As and 102 Bs. In these embodiments, although the included angle θ₁The angle is 90 degrees or 135 degrees, but the cover layer 110 formed on a portion of the top surface 102t, a portion of the side surface 102As and a portion of the side surface 102Bs of the first sub-mount substrate 102A and the second sub-mount substrate 102B can be used As the optical structure 100R, so that the reflected light generated after the light L reaches the first sub-mount substrate 102A and the second sub-mount substrate 102B can be effectively reduced.

Furthermore, it should be understood that in some embodiments, the cover layer 110 may also be applied to the embodiment having a single primary support substrate 102as shown in fig. 2.

In some embodiments, the reflectivity of the overlayer 110 can be between 0% and 10% (0% and 10% reflectivity), between 0.001% and 5%, or between 0.01% and 0.5%. The term "reflectivity" as used herein refers to the percentage of the integral of the spectrum of the reflected light of the light source (e.g., ambient light) divided by the integral of the spectrum of the incident light, and in some embodiments, the light source may comprise visible light (e.g., wavelengths between 380nm and 780 nm) or ultraviolet light (e.g., wavelengths less than 365nm), but is not limited thereto, for example, when the light source is visible light, the reflectivity of the cover layer or the dark layer refers to the percentage of the integral of the spectrum of the reflected light in the range of 380nm to 780nm divided by the integral of the spectrum of the incident light in the same range between 0% and 10%. In other words, in some embodiments, the absorbance of the overlayer 110 can be between 90% and 100% (90% ≦ absorbance ≦ 100%), between 95% and 100%, or between 97% and 100%. In some embodiments, the covering layer 110 may include a substrate and a covering pigment formed in the substrate, but the present invention is not limited thereto. In some embodiments, the aforementioned substrate may comprise an organic resin, a glass paste, other suitable materials, or a combination of the aforementioned, but is not limited thereto.

In some embodiments, the covering layer 110 may be formed on the first sub-support substrate 102A and the second sub-support substrate 102B by a chemical vapor deposition process, a coating process, an evaporation process, a sputtering process, a pasting process, a printing process, or other suitable processes, but the invention is not limited thereto. In addition, in some embodiments where the first sub-supporting substrate 102A and the second sub-supporting substrate 102B include aluminum, the covering layer 110 may be formed by an Anodic Aluminum Oxide (AAO) process.

Referring to fig. 9, fig. 9 is a schematic cross-sectional view taken along line a-a' of fig. 1 according to another embodiment of the present disclosure. As shown in fig. 9, according to some embodiments, the capping layer 110 may be formed on the side surface 102s and the side surface 102As of the first sub-supporting substrate 102A, but not on other surfaces of the first sub-supporting substrate 102A. Similarly, according to some embodiments, the capping layer 110 may be formed on the side surface 102s and the side surface 102Bs of the second sub-supporting substrate 102B, but not on other surfaces of the second sub-supporting substrate 102B. Furthermore, in these embodiments, the cover layer 110 also at least partially overlaps the gap GP in a top view direction (e.g., the Z direction shown in the figure) of the tiled display apparatus 10.

Next, referring to fig. 10, fig. 10 is a schematic structural diagram of a main supporting substrate 102 of the tiled display device 10 according to some embodiments of the present invention. As shown in FIG. 10, according to some embodiments, an optical structure 100R (not labeled) (e.g., a first portion 100R)_AOr the second part 100R_B) May comprise a non-planar surface NP. Although reference numerals for some elements are not shown in fig. 10, fig. 10 and the following description may be understood with reference to the drawings provided above (e.g., fig. 3).

Further, an end point P is indicated in FIG. 10₁And the end point P₂(e.g., two endpoints or inflection points of the top surface 102 t), and an endpoint P₃(e.g., the end point or inflection point of the side surface 102s, and also the end point or inflection point of the side surface 102As connecting to the side surface 102s, for example) to clarify the end points defined in the embodiments of the present invention.

In some embodiments, a portion of the top surface 102t and a portion of the side surfaces 102As and 102s of the main support substrate 102 (or the first sub-support substrate 102A and the second sub-support substrate 102B) may have non-planar surfaces NP thereon. In some embodiments, the non-planar surface NP may comprise a corrugated surface, a bumpy surface, other non-planar surface types, or combinations thereof. In addition, the surface pattern of the non-flat surface NP may be irregular (e.g., region R)₁Shown) or regular (as in region R)₂Shown).

Furthermore, it should be understood that in some embodiments, the non-planar surface NP may also be applied to the embodiment shown in fig. 2 having a single primary support substrate 102.

In some embodiments, the roughness R of the non-planar surface NP is_a) Can range from 0.05 μm to 50 μm (0.05 μm ≦ R_a≦ 50 μm), between 1 μm and 40 μm, or between 10 μm and 30 μm, e.g., 15 μm, 20 μm, or 25 μm, etc. According to some embodiments, the roughness of the non-planar surface NP may be measured by an atomic force microscope (atomic force microscope), a surface roughness meter, a white light interferometer, a laser microscope, or other instrument that can measure roughness.

In some embodiments, the main support substrate 102 (or the first sub-support substrate 102A and the second sub-support substrate 102B) may be subjected to a surface roughening treatment (surface roughening treatment) by a mechanical or chemical method to form the non-planar surface NP. In addition, in some embodiments where the material of the substrate includes aluminum, the non-planar surface NP may be formed by an Anodic Aluminum Oxide (AAO) process.

In summary, according to some embodiments of the present invention, the tiled display device includes an optical structure, which can reduce the reflected light generated by the ambient light at the tiled portion of the display, and reduce the interference of the ambient light on the image quality displayed by the display. According to some embodiments, the optical structure may be, for example, a light reflection suppressing structure.

Although embodiments of the present invention and their advantages have been disclosed, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention. Features of the embodiments of the invention may be combined and matched arbitrarily without departing from the spirit or conflict of the invention. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but it is to be understood that any process, machine, manufacture, composition of matter, means, method and steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present application. Accordingly, the scope of the present application includes the processes, machines, manufacture, compositions of matter, means, methods, and steps described above. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present invention also includes combinations of the respective claims and embodiments. The scope of the invention is to be determined by the claims appended hereto.

Claims

1. A tiled display apparatus, comprising:

a main support substrate;

the first display substrate is arranged on the main supporting substrate; and

a second display substrate disposed on the main support substrate and adjacent to the first display substrate;

the main supporting substrate comprises a light reflection suppressing structure, and the light reflection suppressing structure is overlapped with a gap between the first display substrate and the second display substrate in the upward viewing direction of the tiled display device.

2. The tiled display apparatus of claim 1 wherein the main support substrate comprises a first sub-support substrate and a second sub-support substrate, the first display substrate being disposed on the first sub-support substrate and the second display substrate being disposed on the second sub-support substrate.

3. A tiled display arrangement according to claim 2, wherein a first part of the light reflection suppressing structure is part of the first sub-support substrate and a second part of the light reflection suppressing structure is part of the second sub-support substrate.

4. The tiled display arrangement of claim 3 wherein the first sub-support substrate includes a top surface and a side surface connected to the top surface, the side surface not being perpendicular to the top surface, the side surface being the first portion of the light reflection suppressing structure.

5. The tiled display arrangement according to claim 4, wherein the angle between the top surface and the side surface is larger than 135 degrees and smaller than 180 degrees.

6. The tiled display arrangement according to claim 4, wherein the angle between the top surface and the side surface is larger than 90 degrees and smaller than 135 degrees.

7. The tiled display arrangement of claim 4 wherein the side surface includes a curved portion.

8. A tiled display arrangement according to claim 4, wherein the second part of the light reflection suppressing structure comprises a dark layer, a non-flat surface or a combination of the foregoing.

9. The tiled display apparatus of claim 2 wherein a distance between the first sub-support substrate and the second sub-support substrate is less than the gap between the first display substrate and the second display substrate.

10. A tiled display arrangement according to claim 1, wherein the light reflection suppressing structure comprises a dark color layer, a non-flat surface or a combination of the foregoing.