CN111833758A - Video Wall - Google Patents

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

Video Wall

technical field

The present invention relates to a splicing display device, and in particular, to a splicing display device with an optical structure.

Background technique

Electronic products, including display panels, such as smartphones, tablets, laptops, monitors, and TVs, have become indispensable necessities in modern society. With the boom in such portable electronics, consumers have high expectations for the quality, functionality or price of these products.

Sub-millimeter light emitting diode (mini LED) and micro light emitting diode (micro LED) technology are flat panel display device technologies emerging in recent years. seamless image. However, when the sub-millimeter light emitting diode and micro light emitting diode technology is applied to a large-size display panel, it is mostly achieved by splicing. As resolution requirements increase, the spacing of LEDs decreases, which limits the space available for panel splicing joints.

Although existing video wall devices can generally meet their original intended use, they have not yet fully met the requirements in every respect. Therefore, developing a structural design that can improve the quality or reliability of the video tiled display device is still one of the current research topics in the industry.

SUMMARY OF THE INVENTION

According to some embodiments of the present invention, a tiled display device is provided, including: a main support substrate, a first display substrate, and a second display substrate. The first display substrate is disposed on the main support substrate, and the second display substrate is disposed on the main support substrate and adjacent to the first display substrate. The main support substrate includes a light reflection suppression structure, and in the top view direction of the tiled display device, the light reflection suppression structure overlaps with the gap between the first display substrate and the second display substrate.

Description of drawings

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 shows a top-view structural schematic diagram of a splicing display device according to some embodiments of the present invention;

Figures 2 to 9 show schematic cross-sectional structures along the section line A-A' in Figure 1 according to some embodiments of the present invention;

10 shows a schematic structural diagram of a main supporting substrate of a tiled display device according to some embodiments of the present invention.

Symbol Description

100R optical structure;

100R _A Part I;

100R _B Part II;

102 Main support substrate;

102A the first sub-support substrate;

102B the second sub-support substrate;

102b bottom surface;

102s, 102s’ side surface;

102t top surface;

200 display elements;

202A a first display substrate;

202As, 202Bs side surface;

202B the second display substrate;

204 circuit layer;

206 display layer;

302 bonding layer;

A-A’ stub;

d ₁ , d ₂ distance;

GP clearance;

P ₁ , P ₂ , P ₃ , P ₁ ′, P ₂ ′, P ₃ ′ endpoints;

T thickness;

The included angle between θ ₁ and θ ₂ .

Detailed ways

The splicing display device and the manufacturing method thereof according to the embodiments of the present invention will be described in detail below. It should be appreciated that the following description provides many different embodiments or examples for implementing various aspects of some embodiments of the present invention. The specific elements and arrangements described below are intended to simply and clearly describe some embodiments of the present invention. Of course, these are only used as examples rather than limitations of the present invention. Furthermore, similar and/or corresponding reference numerals may be used in different embodiments to designate similar and/or corresponding elements in order to clearly describe the present invention. However, the use of these similar and/or corresponding reference numbers is merely for the purpose of simply and clearly describing some embodiments of the present invention and does not imply any association between the different embodiments and/or structures discussed.

It should be understood that the elements or devices of the figures may exist in various forms known to those skilled in the art to which the invention pertains. In addition, relative terms, such as "lower" or "bottom" or "higher" or "top" may be used in embodiments to describe the relative relationship of one element of the figures to another element. It will be understood that if the device of the figures were turned upside down, elements described on the "lower" side would become elements on the "upper" side. The embodiments of the present invention can be understood together with the accompanying drawings, and the accompanying drawings of the present invention are also regarded as a part of the description of the invention. It is to be understood that the drawings of the present invention are not to scale and, in fact, the dimensions of elements may be arbitrarily enlarged or reduced in order to clearly represent the features of the present invention.

Furthermore, when it is mentioned that a first material layer is disposed on or above a second material layer, it includes the situation that the first material layer and the second material layer are in direct contact. Alternatively, one or more layers of other materials may be spaced apart, in which case the first and second layers of material may not be in direct contact.

Furthermore, the elements or devices of the drawings may exist in various forms known to those skilled in the art to which the invention pertains. In addition, it will 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 replaced by these terms limited. These terms are only used to distinguish between different elements, components, regions, layers or sections. 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.

In the text, the term "substantially" usually means within 20%, or within 10%, or within 5%, or within 3%, or within 2%, or within 1% of a given value or range , or within 0.5%. The quantity given here is an approximate quantity, that is, the meaning of "substantially" can still be implied if "substantially" is not specifically stated.

In some embodiments of the present invention, terms related to joining and connecting, such as "connection", "interconnection", etc., unless otherwise defined, may mean that the two structures are in direct contact, or may also mean that the two structures are not in direct contact, There are other structures located between these two structures. And the terms of joining and connecting can also include the case where both structures are movable, or both structures are fixed.

Unless otherwise defined, 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 is to be understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having meanings consistent with the relevant art and the background or context of the present invention, and should not be interpreted in an idealized or overly formal manner, Unless otherwise defined in the embodiments of the present invention.

According to some embodiments of the present invention, a tiled display device is provided that includes an optical structure that can change the path of light or reduce the intensity of light reflection. In some embodiments, the optical structure can be, for example, a lightrefection reduction structure, which can reduce the reflected light generated by ambient light at the display splicing place, and reduce the interference of ambient light on the image quality presented by the display , and the light reflection suppression structure is taken as an example below. The "light reflection suppression" mentioned in this case means that the spectral integral value of the reflected light from the light source (such as ambient light) is smaller than the spectral integral value of the incident light. In some embodiments, the light source may include visible light (such as wavelengths between 380nm between 780nm and 780nm) or ultraviolet light (such as wavelength less than 365nm), but not limited to this, that is, when the light source is visible light, the spectral integral value of reflected light in the range of wavelength 380nm to wavelength 780nm is smaller than the spectral integral of incident light in the same range value.

Please refer to FIG. 1 . FIG. 1 shows a schematic top-view structure diagram of a mosaic display device 10 according to some embodiments of the present invention. It should be understood that, for clarity of illustration, only some elements of the tiled display device 10 are shown in FIG. 1 . Furthermore, according to some embodiments, additional features may be added to the video wall 10 described below. In other embodiments, some features of the video tiled display device 10 described below may be replaced or omitted.

As shown in FIG. 1 , according to some embodiments, the tiled display device 10 may include a plurality of display units 100 arranged adjacent to each other. In some embodiments, the display unit 100 may include a main support substrate 102 and a display element 200 , and the display element 200 may be disposed on the main support substrate 102 . In some embodiments, the size of the primary support substrate 102 may be larger than the size of the display element 200 (eg, display substrate 202A or 202B in FIG. 2 ), eg, at least a portion of the primary support substrate may be viewed from the top view of the video wall 10 . 102 protrudes from the display element 200. For example, the four sides of the main support substrate 102 may protrude from the display element 200 along the X direction or the Y direction in the figure, and the main support substrate 102 can be used as the main connection between the display units 100. substrate. In some embodiments, since the size of the main support substrate 102 is larger than that of the display element 200 , the splicing portion TP between the main supporting substrates 102 may not be covered by the display element 200 , and therefore, ambient light may illuminate the splicing portion TP .

Please refer to FIG. 2. FIG. 2 shows a schematic diagram of a cross-sectional structure along the section line A-A' in FIG. 1 according to some embodiments of the present invention. It should be understood that, both of the two sectional lines A-A' in Fig. 1 can correspond to the cross-sectional structure shown in Fig. 2, and the same is true for the subsequent Fig. 3 to Fig. 9 . As shown in FIG. 2 , in some embodiments, the tiled display device 10 may include a main support substrate 102 and a plurality of display elements 200 , and the display elements 200 may 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 fluorescence device, a phosphor device , a device with other suitable display media, or a combination of the foregoing, but not limited thereto. According to some embodiments, the light-emitting diode display device may include, for example, organic light-emitting diodes (OLEDs), quantum dot light-emitting diodes (QLEDs), mini light-emitting diodes (mini light-emitting diodes), mini LED), micro light-emitting diodes (micro light-emitting diodes, micro LED), or a combination of the foregoing, but not limited thereto.

Furthermore, in some embodiments, the tiled display device 10 may further include a bonding layer 302 disposed between the main 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 element 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 the 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 drawings of the present invention use sub-millimeter light emitting diodes or micro light emitting diodes as the display element 200 for illustration, but according to some embodiments of the present invention, the display element 200 may be any of the foregoing Display elements or combinations thereof. In addition, the structure of the display element 200 may exist in various forms known to those skilled in the art to which the invention belongs, and details are not described herein.

In addition, in order to clearly illustrate the positional relationship between the display substrates in the different display elements 200 and the main support substrate 102 , the display substrates in the different display elements 200 are further labeled as the first display substrate 202A and the second display substrate 202B herein. As shown in FIG. 2 , in some embodiments, the first display substrate 202A and the 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, there is a gap GP between the first display substrate 202A and the second display substrate 202B, and the gap GP may be located in the splicing portion TP. According to some embodiments, the gap GP refers to the smallest distance between the side surfaces 202As of the first display substrate 202A and the side surfaces 202Bs of the second display substrate 202B.

Notably, the main support substrate 102 includes the optical structure 100R. In some embodiments, the gap GP between the optical structure 100R and the first display substrate 202A and the second display substrate 202B in the top view direction (eg, the Z direction shown in the figure) of the tiled display device 10 is at least Partially overlapping. According to some embodiments, the optical structure 100R can reduce ambient light (eg, light L shown in the figure) to generate reflected light at the gap GP (ie, the splicing portion TP of the display). In detail, according to some embodiments, the optical structure 100R can reduce the generation of reflected light passing through the gap GP, thereby reducing the risk of generating bright lines at the gap GP and disturbing the image quality.

Specifically, the optical structure 100R is a structure capable of reducing the intensity of reflected light. In some embodiments, the structure that can reduce the intensity of some wavelength bands of reflected light can also be used as the optical structure 100R.

As shown in FIG. 2 , in some embodiments, the optical structure 100R is located in the upper portion of the main support substrate 102 . In some embodiments, the optical structure 100R may include a recessed structure. In some embodiments, the primary 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, so that the side surface 102s can be part of the optical structure 100R. Specifically, since the side surface 102s of the main support substrate 102 is not perpendicular to the top surface 102t (that is, the main support substrate 102 has a part of the inclined surface), the reflection generated after the light L reaches the main support substrate 102 can be effectively reduced Light.

In addition, the side surface 102s of the aforementioned main support substrate 102 is a side surface that at least partially overlaps with the gap GP in the top view direction (eg, the Z direction). In some embodiments, there is an included angle θ ₁ between the top surface 102t and the side surface 102s of the main support substrate 102 . In some embodiments, the included angle θ ₁ may be greater than 135 degrees and less than 180 degrees (135 degrees<included angle θ ₁ <180 degrees), or greater than 140 degrees and less than 170 degrees, eg, 145 degrees, 150 degrees, 155 degrees , 160 degrees, or 165 degrees, but not limited thereto. In some embodiments, the included angle θ ₁ may be greater than 90 degrees and less than 135 degrees (90 degrees<the included angle θ ₁ <135 degrees), but is not limited thereto.

In detail, according to some embodiments, the included angle θ ₁ refers to the end point P ₁ and the end point P ₂ on the top surface 102t of the main support substrate 102 (for example, the two end points of the top surface 102t in a cross-sectional structure or is the inflection point), and the connection between the end point P1 and the other end point _{P3 on} the side surface 102s (for example, the end point or the inflection point of the side surface 102s in a cross-sectional structure) formed by the connection line angle.

As shown in FIG. 2 , in some embodiments, the lower portion of the main 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 102s' is not perpendicular to the bottom surface 102b. According to some embodiments, the lower portion of the main support substrate 102 has a concave structure, thereby improving the efficiency of the subsequent assembly process of the tiled display device 10 .

In some embodiments, the side surface 102s' of the main support substrate 102 is a side surface that at least partially overlaps the gap GP. In some embodiments, the bottom surface 102b of the main support substrate 102 and the side surface 102s' have an included angle θ ₂ . In some embodiments, the range of the included angle θ ₂ may be greater than 90 degrees and less than 180 degrees (90 degrees<the included angle θ ₂ <180 degrees). In some embodiments, the included angle θ ₂ may be equal to 90 degrees. In addition, the included angle θ ₁ may be the same as or different from the included angle θ ₂ .

According to some embodiments, the included angle θ ₂ refers to the end point P ₁ ′ and the end point P ₂ ′ on the bottom surface 102 b of the main supporting substrate 102 (eg, two end points or turning points of the bottom surface 102 b in a cross-sectional structure) ), and the end point P ₁ ' and the other end point P ₃ ' on the side surface 102s' (for example, the end point or the turning point of the side surface 102s' in a cross-sectional structure, it can also be, for example, the side surface 102AS connects the angle formed by the connecting lines between the end points or turning points) of the side surfaces 102s'.

In addition, according to an embodiment of the present invention, an optical microscope (OM), a scanning electron microscope (SEM), an angle measuring instrument, or other suitable methods can be used to measure the aforementioned included angle θ ₁ and the included angle θ ₂ , but the present invention is not limited thereto. Specifically, in some embodiments, a scanning electron microscope can be used to obtain a cross-sectional image of the structure, and a goniometer can be used to measure the included angle θ ₁ and the included angle θ ₂ .

Furthermore, the main support substrate 102 may comprise a flexible substrate or a non-flexible substrate. In some embodiments, the material of the main support substrate 102 may include metal, plastic, glass, quartz, sapphire, ceramic, carbon fiber, other suitable substrate materials, or a combination of the foregoing, but is not limited thereto. In some embodiments, the material of the aforementioned metal may include aluminum (Al), copper (Cu), molybdenum (Mo), silver (Ag), tin (Sn), tungsten (W), gold (Au), chromium (Cr) ), nickel (Ni), platinum (Pt), aluminum alloys, copper alloys, molybdenum alloys, silver alloys, tin alloys, tungsten alloys, gold alloys, chromium alloys, nickel alloys, platinum alloys, other suitable metal materials, or the foregoing combination, but not limited to this. In some embodiments, the aforementioned plastic material may include polyimine (PI), polyethylene terephthalate (PET), polycarbonate (PC), and other suitable materials , or a combination of the foregoing, but not limited thereto. Additionally, in some embodiments, the primary support substrate 102 may comprise a metal-fiberglass composite sheet, or a metal-ceramic composite sheet, but is not limited thereto.

Also, the main support substrate 102 may have a thickness T. As shown in FIG. In some embodiments, the thickness T of the main support substrate 102 may be in the range of 500 micrometers (μm) to 5 millimeters (mm) (500 μm≦thickness T≦5mm), or between 1 mm and 4 mm , for example, 1.5 mm, 2 mm, 2.5 mm, 3 mm, or 3.5 mm, but not limited thereto. It should be understood that, according to different types of display devices, the thickness T may have other suitable ranges, and the present invention is not limited thereto.

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

According to the embodiments of the present invention, an optical microscope (OM), a scanning electron microscope (SEM), a film thickness profiler (α-step), an ellipsometer, or other suitable methods may be used. The thickness and length of each element or the distance between each element are measured, but the present invention is not limited thereto. In detail, in some embodiments, a scanning electron microscope can be used to obtain a cross-sectional image of the structure, and a suitable instrument can be used to measure the thickness, width, or distance between elements in the image.

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 plastic, glass, quartz, sapphire, ceramic, carbon fiber, other suitable substrate materials, or the aforementioned combination, but not limited to this. In some embodiments, the aforementioned plastic material may include polyimine (PI), polyethylene terephthalate (PET), polycarbonate (PC), and other suitable materials , or a combination of the foregoing, but not limited thereto. In addition, in some embodiments, the display substrate 202 may include 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 of the foregoing may be performed on the main support substrate 102 to The aforementioned optical structure 100R is formed. In other embodiments, the main support substrate 102 having the optical structure 100R can be formed by using a mold and an injection molding process, but is not limited thereto.

Next, please refer to FIG. 3 . FIG. 3 shows a schematic cross-sectional structure diagram along the section line A-A' in FIG. 1 according to other embodiments of the present invention. It should be understood that in the following, the same or similar components or elements as the previous ones will be denoted by the same or similar reference numerals, and their materials, manufacturing methods and functions are the same or similar to the previous ones, so this part will not be repeated hereafter. .

As shown in FIG. 3, according to some embodiments, the main support substrate 102 may include a plurality of sub-support substrates. 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 It can be disposed on the second sub-support substrate 102B.

In some embodiments, the optical structure 100R of the tiled display device 10 may include a first portion _100RA and a second portion _100RB , the first portion _100RA may be a portion of the first sub-support substrate 102A, and the second portion _100RB may be A part of the second sub-support substrate 102B. In addition, the first part _{100RA and the second part 100R B of} the optical structure 100R also at least partially overlap with the gap GP in the top view direction (eg, the Z direction shown in the figure) of the tiled display device 10 .

In some embodiments, the first portion 100R _A is located at an upper portion of the first sub-support substrate 102A, and the second portion 100R _B is located at an upper portion of the second sub-support substrate 102B. In some embodiments, the first portion 100R _A and the second portion 100R _B of the optical structure 100R may include chamfer structures.

Specifically, each of the first sub-support substrate 102A and the second sub-support substrate 102B may 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, so that the side surface 102s They can be used as the first part _{100RA and the second part 100R B of} the optical structure 100R, respectively. As mentioned above, since the side surfaces 102s of the first sub-support substrate 102A and the second sub-support substrate 102B are not perpendicular to the top surface 102t (including the chamfered structure), the light L reaching the first sub-support substrate 102A and the second sub-support substrate 102A can be effectively reduced. The reflected light generated by the two sub-supporting substrate 102B.

In addition, the side surfaces 102s of the aforementioned first sub-support substrate 102A and the second sub-support substrate 102B are side surfaces that at least partially overlap with 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 θ ₁ . In some embodiments, the included angle θ ₁ may be greater than 135 degrees and less than 180 degrees (135 degrees<included angle θ ₁ <180 degrees), or greater than 140 degrees and less than 170 degrees, eg, 145 degrees, 150 degrees, 155 degrees , 160 degrees, or 165 degrees, but not limited thereto.

In detail, according to some embodiments, the included angle θ ₁ refers to the end points P ₁ and P ₂ on the top surfaces 102t of the first sub-support substrate 102A and the second sub-support substrate 102B (eg, in a cross-sectional structure) The connecting line between the two end points or turning points of the top surface 102t _of the upper surface 102t, and the end point P1 and the other end point _P3 on the side surface 102s (for example, the end point or turning point of the side surface 102s in a cross-sectional structure) , can also be, for example, the angle formed by the connecting line between the side surfaces 102AS connecting the end points or turning points of the side surfaces 102s.

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 102s' is not perpendicular to the bottom surface 102b. According to some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B have a chamfered structure at the lower portion, thereby improving the efficiency of the subsequent assembly process of the video wall 10 .

In some embodiments, the side surfaces 102s' of the first sub-support substrate 102A and the second sub-support substrate 102B are side surfaces that at least partially overlap with the gap GP. In some embodiments, the bottom surface 102b and the side surface 102s' of the first sub-support substrate 102A and the second sub-support substrate 102B respectively have an included angle θ ₂ . In some embodiments, the range of the included angle θ ₂ may be greater than 90 degrees and less than 180 degrees (90 degrees<the included angle θ ₂ <180 degrees). In some embodiments, the included angle θ ₂ may be equal to 90 degrees (ie, without chamfers). In addition, the included angle θ ₁ may be the same as or different from the included angle θ ₂ .

According to some embodiments, the included angle θ ₂ refers to the end point P ₁ ′ and the end point P ₂ ′ on the bottom surfaces 102b of the first sub-support substrate 102A and the second sub-support substrate 102B (eg, the bottom in a cross-sectional structure). The connecting line between the two end points or turning points of the surface 102b, and the end point P1 _' and the other end point _P3 ' on the side surface 102s' (for example, the end point of the side surface 102s' in a cross-sectional structure or is the turning point, and can also be, for example, the angle formed by the connecting line between the side surfaces 102AS connecting the end points or turning points of the side surfaces 102s'.

As shown in FIG. 3 , in some embodiments, the first sub-support substrate 102A may have another side surface 102As, the second sub-support substrate 102B may have another side surface 102Bs, and the side surface 102As and the side surface 102Bs are disposed opposite to each other . In addition, the side surface 102As and the side surface 102Bs also at least partially overlap with the gap GP.

In some embodiments, the side surface 102As of the first sub-support substrate 102A and the side surface 202As of the first display substrate 202A may be separated by a distance d ₁ , that is, compared with the side surface 202As of the first display substrate 202A, The side surface 102As of the first sub-support substrate 102A protrudes by a distance d ₁ . In some embodiments, compared with the outer surface of the first display substrate 202A (the surface opposite to the side surface 202As, not marked), the outer surface of the first sub-support substrate 102A (the surface opposite to the side surface 102As, not marked) ) can also be highlighted by a distance. In some embodiments, the side surface 102Bs of the second sub-support substrate 102B and the side surface 202Bs of the second display substrate 202B may be separated by a distance d ₁ , that is, compared with the side surface 202Bs of the second display substrate 202B, The side surface 102Bs of the second sub-support substrate 102B protrudes by a distance d ₁ . In some embodiments, the distance d ₁ is less than one half of the pixel pitch of the light-emitting units (not shown) in the display element 200 (ie, d ₁ <1/2 pixel pitch), so that the light-emitting units are in A consistent pixel pitch can still be maintained at the gap GP (splicing place), so as to reduce the user's perception of the gap at the gap GP when viewing, so as to improve the display quality.

Specifically, in some embodiments, the distance d ₁ may range from 10 μm to 300 μm (10 μm≦distance d ₁ ≦3mm), from 50 μm to 250 μm, or from 100 μm to 200 μm. However, it should be understood that the distance d ₁ 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 distance d ₁ refers to a top view direction perpendicular to the video tile 10 (eg, the X direction shown in the figure), which may be, for example, a cross-sectional view (eg, FIG. 3 ) In the Z direction, 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 distance between the side surface 102Bs of the second sub-support substrate 102B and the second display substrate 202B Minimum distance between side surfaces 202Bs. In some embodiments, the distance d ₁ of the first sub-support substrate 102A and the distance d ₁ of the second sub-support substrate 102B may be the same or different.

In addition, in some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B may be separated by a distance d ₂ , and the distance d ₂ is smaller than the gap GP between the first display substrate 202A and the second display substrate 202B . In some embodiments, the distance d ₂ may be close to 0, that is, the first sub-support substrate 102A is relatively close to the second sub-support substrate 102B. In some embodiments, the distance d ₂ may approach or be equal to 0, that is, the first sub-support substrate 102A may be in contact with the second sub-support substrate 102B. When the distance d ₂ is smaller than the gap GP, the risk of collision and fragmentation due to the proximity between the display elements 200 can be reduced during the assembly process.

According to some embodiments, the distance d ₂ refers to a top-view direction perpendicular to the video wall 10 (eg, the X-direction shown in the figure), which may be, for example, a cross-sectional view (eg, FIG. 3 ) In the Z direction, the minimum distance between the side surfaces 102As of the first sub-support substrate 102A and the side surfaces 102Bs of the second sub-support substrate 102B.

Next, please refer to FIG. 4 . FIG. 4 shows a schematic cross-sectional structure diagram along the section line AA′ in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 4 , in some embodiments, the included angle _θ1 between the top surface 102t and the side surface 102s of the first sub-support substrate 102A and the second sub-support substrate 102B may be greater than 90 degrees and less than 135 degrees (90 degrees). degree < angle θ ₁ <135 degrees), or greater than 100 degrees and less than 120 degrees, for example, 95 degrees, 100 degrees, 105 degrees, 110 degrees, or 115 degrees, but not limited thereto.

Similarly, as shown in FIG. 4 , in some embodiments, the optical structure 100R may include a first part 100RA and a second part 100R _B , and the first part _100RA and the second part 100R _B may be located on the first sub _- support substrate 102A, respectively and the upper portion of the second sub-support substrate 102B. In addition, 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 also not perpendicular (including the chamfered structure), so the light L can effectively reduce the reaching of the first sub-support The reflected light generated after the substrate 102A and the second sub-supporting substrate 102B reduces the risk of generating bright lines at the gap GP and thus reducing the image quality.

In addition, in some embodiments, the top surface 102t of the first sub-support substrate 102A and the other side surface 102st (the side surface on the outer side) may have an included angle θ ₁ ′. In some embodiments, the included angle θ ₁ ′ may be the same as or different from the included angle θ ₁ . According to some embodiments, the included angle θ ₁ ′ and the included angle θ ₁ of the second sub-support substrate 102B may also have the aforementioned relationship.

Next, please refer to FIG. 5 . FIG. 5 shows a schematic cross-sectional structure diagram along the section line AA′ in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 5 , in some embodiments, the side surfaces 102s of the first sub-support substrate 102A and the second sub-support substrate 102B may include curved surface portions RC. In detail, in some embodiments, the curved portion RC of the side surface 102s may have a radius of curvature r. The aforementioned "curved portion" refers to a portion that is not substantially parallel to the top surface 102t to a portion that is substantially non-parallel to the side surface (eg, the side surface 102As or the side surface 102Bs). In some embodiments, the radius of curvature r may be greater than or equal to the distance d ₁ between the side surface 102As of the first sub-support substrate 102A and the side surface 202As of the first display substrate 202A, and the radius of curvature r may be less than or equal to the first The thicknesses T of the sub-support substrate 102A and the second sub-support substrate 102B (ie, d ₁ ≦curvature radius r≦T).

In some embodiments, the radius of curvature r refers to a curve between the end point P1 on the top surface 102t of the first sub-support substrate 102A and the other end point _{P3 on} the side surface 102s (for example, in a cross-sectional structure The radius of curvature of the end point P ₁ and the end point P ₃ ). Specifically, in this embodiment, the end point P ₁ can be substantially the end point where the curvature of the top surface 102t is not 0, and the end point P ₃ is substantially the end point where the curvature is not 0 on the side surface 102s.

In this embodiment, the side surfaces 102s and the top surface 102t of the first sub-supporting substrate 102A and the second sub-supporting substrate 102B are also not perpendicular (including the curved portion RC), so the light L can be effectively reduced to reach the first sub-supporting substrate 102A and the reflected light generated by the second sub-support substrate 102B, thereby reducing the risk of bright lines being generated at the gap GP and thus disturbing the image quality.

Next, please refer to FIG. 6. FIG. 6 shows a schematic cross-sectional structure diagram along the section line A-A' in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 6 , according to some embodiments, the tiled display device 10 may be a curved tiled display. 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 fixed curvatures.

In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B are assembled to form a concave display structure. For example, the horizontal position of the end point P2 _on the top surface 102t of the _first sub-support substrate 102A is higher than that of the end point P1. In addition, in this embodiment, the included angle θ ₁ refers to the tangent line L ₁ on the top surface 102t of the _first sub-support substrate 102A at the end point P1 (that is, the tangent line on the top surface 102t passing through the end point P1 ) and the side surface The angle formed between 102s. Similarly, in this embodiment, the included angle θ ₂ refers to the included angle formed between the tangent line L ₁ ' of the end point P ₁ ' on the bottom surface 102b of the first sub-support substrate 102A and the side surface 102s' . Furthermore, according to some embodiments, the included angle θ ₁ and the included angle θ ₂ of the second sub-support substrate 102B can also be defined in the aforementioned manner.

Next, please refer to FIG. 7. FIG. 7 shows a schematic cross-sectional structure diagram along the section line A-A' in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 7 , according to some embodiments, the tiled display device 10 may be a curved tiled display. 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 fixed curvatures.

In some embodiments, the first sub-support substrate 102A and the second sub-support substrate 102B are assembled to form a convex display structure. In addition, in this embodiment, the definitions of the included angle θ ₁ and the included angle θ ₂ are the same as those described in the embodiment shown in FIG. 6 , and will not be repeated here.

Next, please refer to FIG. 8 . FIG. 8 shows a schematic cross-sectional structure diagram along the section line AA′ in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 8 , according to some embodiments, the first part 100R _A and the second part 100R _B of the optical structure 100R may include a cover layer 110 , and the cover layer 110 may be used for absorbing part of the light. In some embodiments, the cover layer 110 may A darker layer with a darker color. In other words, in some embodiments, part of the top surface 102t and part of the side surface 102As and side surface 102Bs of the first sub-support substrate 102A and the second sub-support substrate 102B may have the cover layer 110 , and the cover layer 110 may be formed on the surface of the tiled display device 10 . The cover layer 110 overlaps the gap GP in a top-view direction (eg, the Z direction shown in the figure). In other embodiments, the cover layer 110 can substantially completely cover the first sub-support substrate 102A and the second sub-support substrate 102B. The cover layer 110 can absorb part of the light to reduce the reflected light at the gap GP.

In addition, in some embodiments, the included angle _θ1 between the top surface 102t of the first sub-support substrate 102A and the side surface 102As may be substantially 90 degrees or 135 degrees, and the first sub-support substrate 102A and the second sub-substrate 102A A cover layer 110 is formed on a part of the top surface 102t and part of the side surface 102As and the side surface 102Bs of the support substrate 102B. In these embodiments, although the included angle _θ1 is 90 degrees or 135 degrees, it is formed on part of the top surface 102t and part of the side surface 102As and side surface 102Bs of the first sub-support substrate 102A and the second sub-support substrate 102B The cover layer 110 can be used as the optical structure 100R, so the reflected light generated after the light L reaches the first sub-supporting substrate 102A and the second sub-supporting substrate 102B can still be effectively reduced.

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

In some embodiments, the reflectivity of the cover layer 110 may be between 0% and 10% (0%≦reflectivity≦10%), between 0.001% and 5%, or between 0.01% and 0.5 %between. The "reflectivity" mentioned in this case refers to the percentage of the spectral integral value of the reflected light of the light source (such as ambient light) divided by the spectral integral value of the incident light. In some embodiments, the light source may include visible light (such as wavelengths between 380nm to 780nm) or ultraviolet light (for example, the wavelength is less than 365nm), but not limited to this, for example, when the light source is visible light, the reflectivity of the cover layer or dark layer refers to the range of wavelength 380nm to wavelength 780nm The percentage of the reflected light spectral integral value divided by the incident light spectral integral value in the same range is between 0% and 10%. In other words, in some embodiments, the absorptivity of the cover layer 110 may be between 90% and 100% (90%≦absorptivity≦100%), between 95% and 100%, or between 97% to 100%. In some embodiments, the cover layer 110 may include a substrate and a cover pigment formed in the substrate, but the present invention is not limited thereto. In some embodiments, the aforementioned substrates may include organic resins, glass pastes, other suitable materials, or combinations of the foregoing, but are not limited thereto.

In some embodiments, the cover layer 110 can be formed on the first sub-support substrate 102A and the on the second sub-support substrate 102B, but the present invention is not limited thereto. In addition, in some embodiments in which the first sub-support substrate 102A and the second sub-support substrate 102B include aluminum, the capping layer 110 may be formed by an anodic aluminum oxide (AAO) process.

Next, please refer to FIG. 9. FIG. 9 shows a schematic cross-sectional structure diagram along the section line A-A' in FIG. 1 according to other embodiments of the present invention. As shown in FIG. 9 , according to some embodiments, the capping layer 110 may be formed on the side surfaces 102s and 102As of the first sub-support substrate 102A, but not on other surfaces of the first sub-support substrate 102A. Similarly, according to some embodiments, the capping layer 110 may be formed on the side surfaces 102s and 102Bs of the second sub-support substrate 102B, but not on other surfaces of the second sub-support substrate 102B. Furthermore, in these embodiments, the cover layer 110 also at least partially overlaps the gap GP in the top view direction (eg, the Z direction shown in the figure) of the tiled display device 10 .

Next, please refer to FIG. 10 . FIG. 10 shows a schematic structural diagram of the main support 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, the optical structure 100R (not labeled) (eg, the first portion 100RA or the second portion 100R _B ) may include _a non-planar surface NP. Although some element numbers are not shown in FIG. 10 , FIG. 10 and the following description can be understood with reference to the figures provided above (eg, FIG. 3 ).

In addition, FIG. 10 shows the endpoints P ₁ and P ₂ (for example, the two endpoints or turning points of the top surface 102t), and the endpoint P ₃ (for example, the endpoints or turning points of the side surface 102s, which can also be, for example, side surfaces). The surface 102As connects the endpoints or inflection points of the side surfaces 102s) to more clearly clarify the endpoints defined in the embodiments of the present invention.

In some embodiments, 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 on part of the top surface 102t and part of the side surfaces 102As and 102s. In some embodiments, the non-planar surface NP may comprise a corrugated surface, a bump-like surface, other non-planar surface topography, or a combination of the foregoing. In addition, the surface morphology of the non-planar surface NP may be irregular (as shown in the region R ₁ ) or regular (as shown in the region R ₂ ).

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 _Ra of the aforementioned non-planar surface NP may range from 0.05 μm to 50 μm (0.05 μm≦R _a ≦50 μm), from 1 μm to 40 μm, or from 10 μm Between 30 μm, for example, 15 μm, 20 μm, or 25 μm, etc. According to some embodiments, the roughness of the non-planar surface NPs can be measured by means of an atomic force microscope, a surface roughness meter, a white light interferometer, a laser microscope, or other instruments 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 using mechanical or chemical methods to have a suitable roughness degrees to form a non-planar surface NP. Furthermore, in some embodiments where the material of the substrate includes aluminum, the non-planar surface NP can be formed by an anodic aluminum oxide (AAO) process.

To sum up, according to some embodiments of the present invention, the splicing display device provided includes an optical structure, and the optical structure can reduce the reflected light generated by the ambient light at the display splicing place, and reduce the interference of the ambient light on the image quality presented by the display. According to some embodiments, the optical structure may eg be a light reflection suppressing structure.

Although the embodiments of the present invention and their advantages have been disclosed above, it should be understood that changes, substitutions and modifications can be made by any person skilled in the art without departing from the spirit and scope of the present invention. The features of the various embodiments of the present invention can be used in any combination as long as they do not violate the spirit of the invention or conflict with each other. In addition, the protection scope of the present invention is not limited to the process, machine, manufacture, material composition, device, method and steps in the specific embodiments described in the specification, and any person skilled in the art can understand current or Processes, machines, manufacturing, material compositions, devices, methods and steps developed in the future can be used according to the present invention as long as they can perform substantially the same functions or achieve substantially the same results in the embodiments described herein. Therefore, the protection scope of the present invention includes the above-mentioned process, machine, manufacture, composition of matter, device, method and steps. In addition, each claimed scope constitutes a separate embodiment, and the protection scope of the present invention also includes the combination of each claimed scope and the embodiments. The protection scope of the present invention should be determined by the appended claims.

Claims (10)

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.

Images