Patent Publication Number: US-2020287109-A1

Title: Electronic device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of Chinese Patent Application No. 201910159481.3, filed Mar. 4, 2019, the entirety of which is incorporated by reference herein. 
     BACKGROUND 
     Technical Field 
     Embodiments of the present disclosure relate to an electronic device, and in particular they relate to an electronic device including a spacing structure. 
     Description of the Related Art 
     Some electronic devices may include light sources in accordance with actual design requirements. In the light source module of the electronic device, dark regions easily occur at the corners of the electronic device to decrease the brightness uniformity. 
     In these electronic devices, a diffuser plate is often used to pass light evenly. In order to support the diffuser plate, support pins are required between the light-emitting element and the diffuser plate. As the size of the electronic device increases, the weight of the diffuser plate increases. In order to enhance the effectiveness of light diffusion and mixing, and to support heavier weight in a large-sized electronic device, the gap between the light-emitting element and the diffuser plate may increase, and the number of support pins may also increase. However, such structural modification will increase the number of components and the thickness of the light source module, and increase the manufacturing time. It is contrary to the design trend of thinning the electronic device. 
     In addition, when local dimming is performed in the aforementioned structure, there are still problems such as large halation or uneven brightness. 
     SUMMARY 
     In some embodiments of the present disclosure, a spacing structure (e.g., a grid structure) is disposed on the substrate of the electronic device, and the light-emitting element is disposed adjacent to the spacing structure. Thereby, the number of components of the electronic device may be reduced or good brightness uniformity may be achieved by adjusting the shape, height, wall thickness or other features of the spacing structure. 
     In accordance with some embodiments of the present disclosure, an electronic device is provided. The electronic device includes a substrate, a light-emitting element, and a spacing structure. The light-emitting element is disposed on the substrate. The spacing structure is disposed adjacent to the light-emitting element, and the spacing structure includes a first wall, a second wall, and a boundary portion. The first wall includes a first protrusion portion and extends in a first direction. The second wall includes a second protrusion portion and extends in a second direction, and the first direction is different from the second direction. The boundary portion is connected to the first protrusion portion and the second protrusion portion, and the height of the boundary portion is lower than the height of the first protrusion portion. 
     The following embodiments, in conjunction with the drawings, will provide a more detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Aspects of the embodiments of the present disclosure can be understood from the following detailed description when reading with the accompanying figures. It should be noted that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  is a partial cross-sectional view illustrating an electronic device according to one embodiment of the present disclosure. 
         FIG. 2  is a partial three-dimensional view illustrating a spacing structure according to one embodiment of the present disclosure. 
         FIG. 3A  is a partial side view illustrating the spacing structure according to one embodiment of the present disclosure. 
         FIG. 3B  is a partial top view illustrating the spacing structure according to one embodiment of the present disclosure. 
         FIG. 4  is a partial three-dimensional view illustrating a spacing structure according to another embodiment of the present disclosure. 
         FIG. 5  is a partial side view illustrating the spacing structure according to another embodiment of the present disclosure. 
         FIG. 6  is a partial top view illustrating the spacing structure according to another embodiment of the present disclosure. 
         FIG. 7A  is a partial top view illustrating an electronic device generally having a plurality of support pins associated with a diffuser plate. 
         FIG. 7B  is a partial top view illustrating the electronic device including a spacing structure. 
         FIG. 8  is a diagram illustrating the brightness-position relationship obtained by optical simulation along line L 1  shown in  FIG. 7A , line L 2  shown in  FIG. 7B , and line L 3  shown in  FIG. 7B . 
         FIG. 9  is a partial three-dimensional view illustrating a spacing structure according to still another embodiment of the present disclosure. 
         FIG. 10A  is a partial side view illustrating the spacing structure according to still another embodiment of the present disclosure. 
         FIG. 10B  is a partial top view illustrating the spacing structure according to another embodiment of the present disclosure. 
         FIG. 11  is a partial cross-sectional view illustrating an electronic device according to one embodiment of the present disclosure. 
         FIG. 12A  is a schematic view illustrating the structure of a rigid material according to one embodiment of the present disclosure. 
         FIG. 12B  is a schematic view illustrating the structure of a rigid material according to another embodiment of the present disclosure. 
         FIG. 13A  is a partial cross-sectional view illustrating an electronic device according to one embodiment of the present disclosure. 
         FIG. 13B  is a partial cross-sectional view illustrating an electronic device according to another embodiment of the present disclosure. 
         FIG. 13C  is a partial cross-sectional view illustrating an electronic device according to still another embodiment of the present disclosure. 
         FIG. 14  is a partial side view illustrating the spacing structure according to one embodiment of the present disclosure. 
         FIG. 15  is a partial top view illustrating an electronic device according to one embodiment of the present disclosure. 
         FIG. 16  is a partial cross-sectional view illustrating an electronic device according to the embodiment of the present disclosure. 
         FIG. 17A  and  FIG. 17B  are partial top views respectively illustrating an electronic device and another electronic device. 
     
    
    
     DETAILED DESCRIPTION 
     The following disclosure provides many different embodiments, or examples, for implementing different features of the subject matter provided. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, a first component is formed on a second component in the description that follows may include embodiments in which the first component is formed in direct contact with the second component, and may also include embodiments in which additional components may be disposed between the first component and second component, so that the first component and second component may not be in direct contact. In addition, the present disclosure may repeat reference numerals and/or letters in the various embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. 
     Furthermore, spatially relative terms, such as “beneath,” “below,” “lower,” “on,” “above,” “upper” and the like, may be used herein to easily describe the spatial relationship between one component to other components as illustrated in the figures. In addition to the orientation depicted in the figures, the spatially relative terms are intended to encompass different orientations of the device in use or operation The spatially relative terms used herein may likewise be interpreted accordingly when the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations). 
     In the present disclosure, the terms “about,” “approximately” and “substantially” typically mean a range of +/−20% of the stated value, more typically a range of +/−10% of the stated value, more typically a range of +/−5% of the stated value, more typically a range of +/−3% of the stated value, more typically a range of +/−2% of the stated value, more typically a range of +/−1% of the stated value and even more typically a range of +/−0.5% of the stated value. The stated value of the present disclosure is an approximate value. That is, when there is no specific description of the terms “about,” “approximately” and “substantially”, the stated value still includes the meaning of “about,” “approximately” or “substantially”. 
     Some variations of the embodiments are described. Throughout various views and illustrative embodiments, like reference numbers are used to designate like elements. It should be understood that additional operations can be provided before, during, and after the method, and some of the operations described can be replaced or eliminated for other embodiments of the method. 
       FIG. 1  is a partial cross-sectional view illustrating an electronic device  100  according to one embodiment of the present disclosure. In this embodiment, the electronic device  100  includes a substrate  10 , a light-emitting element  20 , and a spacing structure  30 . As shown in  FIG. 1 , the light-emitting element  20  and the spacing structure  30  are disposed on the substrate  10 , and the spacing structure  30  is disposed adjacent to the light-emitting element. In the embodiment shown in  FIG. 1 , the spacing structure  30  also includes a bottom plate  30 H disposed to surround the light-emitting element  20 , but the disclosure is not limited thereto. In some embodiments, the spacing structure  30  may not include the bottom plate  30 H. It should be noted that only some components of the electronic device (for example, the electronic device  100 ) are drawn in the drawings of the present disclosure for the convenience of description, but the actual components, structural shapes and dimensions of the electronic device are not limited to the drawings. 
     In some embodiments, the substrate  10  may be a rigid or flexible substrate, and the substrate  10  may be a single-layer structure or a multi-layer structure. The material of the substrate  10  may, for example, include a printed circuit board (PCB), glass, quartz, sapphire or any other applicable rigid material, or polyimide (PI), polyethylene terephthalate (PET or PETE), poly(methyl methacrylate) (PMMA) or any other applicable flexible material, or a combination thereof. In some embodiments, the light-emitting element  20  may include light-emitting diodes (LEDs), but the present disclosure is not limited thereto. In other embodiments, the light-emitting element  20  may include lamps, bulbs, organic light-emitting diodes (OLEDs), quantum dots (QDs), quantum dot light-emitting diodes (QLEDs or QDLEDs), fluorescent materials, phosphor materials, micro light-emitting diode or mini light-emitting diodes, any other applicable luminescent material, or a combination thereof, but the present disclosure is not limited thereto. 
       FIG. 2  is a partial three-dimensional view illustrating a spacing structure  30  according to one embodiment of the present disclosure.  FIG. 3A  is a partial side view illustrating the spacing structure  30  according to one embodiment of the present disclosure. It should be noted that, some components may be omitted in  FIG. 1  to  FIG. 3A  in order to show the structure of the electronic device  100  of the embodiment of the present disclosure more clearly. For example, the bottom plate  30 H of the spacing structure  30  shown in  FIG. 1  does not appear in  FIG. 3A . Further, it should be noted that, in the present disclosure, the light-emitting element  20  is also shown in the drawings associated with the spacing structure  30  (or the following  30 ′,  30 - 1 ,  30 - 2 ,  30 - 3 ) in order to clearly show the spatial relationship between the spacing structure  30  (or the following  30 ′,  30 - 1 ,  30 - 2 ,  30 - 3 ) and the light-emitting element  20 . However, the light-emitting element  20  does not belong to a portion of the spacing structure  30  (or the following  30 ′,  30 - 1 ,  30 - 2 ,  30 - 3 ). 
     In some embodiments, the spacing structure  30  may be highly reflective, and the spacing structure  30  may include flexible or rigid materials, such as plastic, metal or the like, but the present disclosure is not limited thereto. Moreover, the color of the spacing structure  30  may be white or black, and the surface roughness of the spacing structure  30  may also be adjusted according to actual needs (for example, the need for reflectivity). Referring  FIG. 1  to  FIG. 3A , the spacing structure  30  includes a first wall  31  and a second wall  32 . The first wall  31  extends in a first direction D 1 , and the second wall  32  extends in a second direction D 2 . In this embodiment, the first direction D 1  is different from the second direction D 2 . For example, the first direction D 1  is perpendicular to the second direction D 2  in  FIG. 2 , but the present disclosure is not limited thereto. 
     As shown in  FIG. 2 , the spacing structure  30  includes a plurality of first wall  31  and a plurality of second walls  32  arranged to form a grid structure, and a plurality of light-emitting elements  20  may be respectively disposed in the accommodating space S formed by the plurality of first walls  31  and the plurality of second walls  32 . In order to illustrate the main technical features of the present disclosure, the light-emitting element  20  is located at the center of the accommodating space S in a top view in some embodiments (e.g., the embodiments shown in  FIG. 1  to  FIG. 16 ) of the present disclosure, but the present disclosure is not limited thereto. In some embodiments, the light-emitting element  20  may not be located at the center of the accommodating space S in the top view. 
     As shown in  FIG. 2  and  FIG. 3A , in this embodiment, the spacing structure  30  includes the first wall  31 , the second wall  32  and a boundary portion  312 . The first wall  31  includes a first protrusion portion  31 A and extends in a first direction D 1 . The second wall  32  includes a second protrusion portion  32 A and extends in a second direction D 2 , wherein the first direction D 1  is different from the second direction D 2 . The boundary portion  312  is connected to the first protrusion portion  31 A and the second protrusion portion  32 A, and the height H 2  of the boundary portion  312  is lower than the height H 1  of the first protrusion portion  31 A. As shown in  FIG. 3A , in the embodiment of the present disclosure, the height H 2  of the boundary portion  312  is defined as the minimum height of the boundary portion  312  measured from the top surface of the substrate  10  in the normal direction of the substrate  10  (i.e., the direction perpendicular to the top surface of the substrate  10 ); the height H 1  of the first protrusion portion  31 A is defined as the maximum height of the first protrusion portion  31 A measured from the top surface of the substrate  10  in the normal direction of the substrate  10 . 
     Similarly, the height of the boundary portion  312  is lower than the height of the second protrusion portion  32 A in this embodiment. The height of the second protrusion portion  32 A is defined as the maximum height of the second protrusion portion  32 A measured from the top surface of the substrate  10  in the normal direction of the substrate  10 . In the embodiments of the present disclosure, the height of the first protrusion portion  31 A and the height of the second protrusion portion  32 A may be the same or different, which are not limited. 
       FIG. 3B  is a partial top view illustrating the spacing structure  30  according to one embodiment of the present disclosure. As shown in  FIG. 3B , the range of the boundary portion  312  may be defined by the thickness t 1  of the bottom of the first wall  31  and the thickness t 2  of the bottom of the second wall  32 . For example, in this embodiment, the boundary portion  312  may be defined by the extension lines of the two edges at the bottom of the first wall  31  and the extension lines of the two edges at the bottom of the second wall  32  (e.g., the dashed box shown in  FIG. 3B ). The range that the first wall  31  deducts the boundary portion  312  may be defined as the range of the first protrusion portion  31 A. Similarly, the range that the second wall  32  deducts the boundary portion  312  may be defined as the range of the second protrusion portion  32 A. In this embodiment, the first wall  31  may have a plurality of first protrusion portions  31 A, and one of the of first protrusion portions  31 A is located between two boundary portions  312 , but the present disclosure is not limited thereto. 
     Referring to the partial top view of the grid structure formed by the first walls  31  and the second walls  32  and circled by the dashed line in  FIG. 2 , in the accommodating space S formed by the first wall  31  and the second wall  32 , the brightness measured in the accommodating space S decreases as the distance between the measuring point and the light-emitting element  20  increases. Therefore, when the light-emitting element  20  is disposed in an accommodating space S, since the distance S 1  between the light-emitting element  20  and the first protrusion portion  31 A is smaller than the distance S 12  between the light-emitting element  20  and the boundary portion  312 , the brightness at the boundary portion  312  and the vicinity is lower. In order to increase the brightness of the boundary portion  312  and the vicinity, the height H 2  of the boundary portion  312  is designed to be lower than the height H 1  of the first protrusion portion  31 A, so that the light of the neighboring accommodation spaces S may transmit across the boundary portion  312 , it may help to increase the brightness at the boundary portion  312  and the vicinity or increase the brightness uniformity in the accommodating space S. 
     Similarly, since the distance S 2  between the light-emitting element  20  and the second protrusion portion  32 A is smaller than the distance S 12  between the light-emitting element  20  and the boundary portion  312 , the height of the boundary portion  312  is designed to be lower than the height of the second protrusion portion  32 A, it may help to increase the brightness at the boundary portion  312  or increase the brightness uniformity in the accommodating space S. 
     In this embodiment, the distance S 1  between the light-emitting element  20  and the first protrusion portion  31 A may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the center of the first protrusion portion  31 A on the substrate  10  in the top view; the distance S 12  between the light-emitting element  20  and the boundary portion  312  may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the center of the boundary portion  312  on the substrate  10  in the top view; the distance S 2  between the light-emitting element  20  and the second protrusion portion  32 A may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the second protrusion portion  32 A on the substrate  10  in the top view. 
     In other words, in this embodiment, by adjusting the height of the spacing structure  30  (the first wall  31  and the second wall  32 ), it is not necessary to add extra components of the electronic device  100  (e.g., a multi-layer diffusing plate), the light-emitting element  20  may mix light more uniformly in the accommodating space S formed by the first wall  31  and the second wall  32 , improving the brightness uniformity of the electronic device  100 , or reducing the thickness of the electronic device  100 . Furthermore, the spacing structure  30  may be formed as one piece to shorten the manufacturing time. 
       FIG. 4  is a partial three-dimensional view illustrating a spacing structure  30 ′ according to another embodiment of the present disclosure.  FIG. 5  is a partial side view illustrating the spacing structure  30 ′ according to another embodiment of the present disclosure.  FIG. 6  is a partial top view illustrating the spacing structure  30 ′ according to another embodiment of the present disclosure. It should be noted that some components may be omitted in  FIG. 4  to  FIG. 6  in order to more clearly show the structure of the spacing structure  30 ′ of the embodiment of the present disclosure. 
     The spacing structure  30 ′ shown in  FIG. 4  to  FIG. 6  may replace the spacing structure  30  shown in  FIG. 1  to  FIG. 3B  to be provided in the electronic device  100  of the embodiment of the present disclosure. 
     As shown in  FIG. 4 , the spacing structure  30 ′ includes a plurality of first walls  31 ′ and a plurality of second walls  32 ′ arranged to form a grid structure, and a plurality of light-emitting elements  20  may be respectively disposed in the accommodating spaces S formed by the plurality of first walls  31 ′ and the plurality of second walls  32 ′. The spacing structure  30 ′ may further include a plurality of bottom plates  30 H′ disposed in the bottoms of the accommodating spaces S, but the present disclosure is not limited thereto. In some embodiments, the spacing structure  30 ′ may not include the bottom plates  30 H′. Moreover, the first walls  31 ′ extend in a first direction D 1 , and the second walls  32 ′ extend in a second direction D 2 . In this embodiment, the first direction D 1  is different from the second direction D 2 . For example, the first direction D 1  is perpendicular to the second direction D 2  in  FIG. 4  to  FIG. 6 , but the present disclosure is not limited thereto. 
     Referring to  FIG. 4  and  FIG. 5 , in this embodiment, a first wall  31 ′ includes a first protrusion portion  31 A′ and a second wall  32 ′ includes a second protrusion portion  32 A′, and a boundary portion  312 ′ connects to the first protrusion portion  31 A′ and the second protrusion portion  32 A′. As shown in  FIG. 5 , the height H 2 ′ of the boundary portion  312 ′ is lower than the height H 1 ′ of the first protrusion portion  31 A′. Similarly, the height of the boundary portion  312 ′ is lower than the height of the second protrusion portion  32 A′. In this embodiment, the height of the first protrusion portion  31 A′ and the height of the second protrusion portion  32 A′ may be the same or different, which are not limited. 
     It should be noted that in this embodiment, the first wall  31 ′ and the second wall  32 ′ may have thickness variations as shown in  FIG. 4  to  FIG. 6 . As shown in  FIG. 6 , the thickness of the wall may vary along the extending direction of the wall. For example, the thickness of the first protrusion portion  31 A′ of the first wall  31 ′ along the first direction D 1  may be varied between the maximum thickness T 1  and the minimum thickness T 2  (i.e., T 2 ≤the thickness of the first wall  31 ′≤T 1 ). Here, the thickness of the first protrusion portion  31 A′ may be defined as the maximum thickness of the bottom of the first protrusion portion  31 A′ measured in a direction perpendicular to the extending direction D 1  of the first wall  31 ′ in the top view. 
     Similarly, the thickness of the second protrusion portion  32 A′ of the second wall  32 ′ along the second direction D 2  may be varied between the maximum thickness T 3  and the minimum thickness T 4  (i.e., T 4 ≤the thickness of the second wall  32 ′≤T 3 ). Here, the thickness of the second protrusion portion  32 A′ may be defined as the maximum thickness of the bottom of the second protrusion portion  32 A′ measured in a direction perpendicular to the extending direction D 2  of the second wall  32 ′ in the top view. When the thickness of the wall varies along the extending direction of the wall, the range of the boundary portion  312 ′ is defined as the product of the minimum thickness T 2  of the first wall  31 ′ and the minimum thickness T 4  of the second wall  32 ′. That is, the thickness of the boundary portion  312 ′ is less than or equal to the thickness of the first protrusion portion  31 A′ or the thickness of the second protrusion portion  32 A′. 
     In some embodiments, other components may also be disposed on the spacing structure  30 ′ (e.g., the optical element  40  shown in following  FIG. 13A ). Since the height H 2 ′ of the boundary portion  312 ′ is lower than the height H 1 ′ of the first protrusion portion  31 A′ (and the height of the second protrusion portion  32 A′), the supporting stress of the spacing structure  30 ′ on the first wall  31 ′ may be concentrated on the first protrusion portion  31 A′ (or the second protrusion portion  32 A′). Therefore, in this embodiment, the maximum thickness T 1  of the first protrusion portion  31 A′ (or the maximum thickness T 3  of the second protrusion portion  32 A′) is designed to be greater than the thickness of the boundary portion  312 ′, so that the spacing structure  30 ′ may have better supporting ability. 
     Furthermore, in this embodiment, in addition to the fact that the thickness of the first wall  31 ′ and the second wall  32 ′ may vary along the extending direction of the wall, the first wall  31 ′ and the second wall  32 ′ may also have different thicknesses at different heights. For example, when the spacing structure  30 ′ shown in  FIG. 4  to  FIG. 6  replaces the spacing structure  30  shown in  FIG. 1  to  FIG. 3B  and is disposed in the electronic device  100  of the present disclosure, the closer the first protrusion portion  31 A′ of the first wall  31 ′ is to the substrate  10 , the thicker the first protrusion portion  31 A′ is. Similarly, the closer the second protrusion portion  32 A′ of the second wall  32 ′ is to the substrate  10 , the thicker the second protrusion portion  32 A′ is, but the present disclosure is not limited thereto. 
     As shown in  FIG. 6 , when the light-emitting element  20  is disposed in the accommodating space S, since the distance S 1 ′ between the light-emitting element  20  and the first protrusion portion  31 A′ is smaller than the distance S 12 ′ between the light-emitting element  20  and the boundary portion  312 , the height H 2 ′ of the boundary portion  312 ′ is designed to be smaller than the height H 1 ′ of the first protrusion portion  31 A′, it may help to increase the brightness at the boundary portion  312 ′ or increase the brightness uniformity in the accommodating space S. In this embodiment, the distance S 1 ′ between the light-emitting element  20  and the first protrusion portion  31 A′ may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the center of the first protrusion portion  31 A′ on the substrate  10  in the top view; the distance S 12 ′ between the light-emitting element  20  and the boundary portion  312 ′ may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the center of the boundary portion  312 ′ on the substrate  10  in the top view. 
     Similarly, since the distance S 2 ′ between the light-emitting element  20  and the second protrusion portion  32 A′ is smaller than the distance S 12 ′ between the light-emitting element  20  and the boundary portion  312 ′, the height H 2 ′ of the boundary portion  312 ′ is designed to be lower than the height of the second protrusion portion  32 A′, it may help to increase the brightness at the boundary portion  312 ′ or increase the brightness uniformity in the accommodating space S. In this embodiment, the distance S 2 ′ between the light-emitting element  20  and the second protrusion portion  32 A′ may be defined as the distance between the projection of the center of the light-emitting element  20  on the substrate  10  and the projection of the center of the second protrusion portion  32 A′ on the substrate  10  in the top view. 
     In the foregoing embodiments, the distance S 1 (S 1 ′) between the light-emitting element  20  and the first protrusion portion  31 A( 31 A′) being equal to the distance S 2 (S 2 ′) between the light-emitting element  20  and the second protrusion portion  32 A( 32 A′) is taken as an example, but the present disclosure is not limited thereto. In some embodiments, the distance S 1 (S 1 ′) between the light-emitting element  20  and the first protrusion portion  31 A( 31 A′) may be different from the distance S 2 (S 2 ′) between the light-emitting element  20  and the second protrusion portion  32 A( 32 A′). 
       FIG. 7A  is a partial top view illustrating an electronic device  105  generally having a plurality of support pins  90  associated with a diffuser plate.  FIG. 7B  is a partial top view illustrating the electronic device  100  including a spacing structure  30 .  FIG. 8  is a diagram illustrating the brightness-position relationship obtained by optical simulation along line L 1  shown in  FIG. 7A , line L 2  shown in  FIG. 7B , and line L 3  shown in  FIG. 7B . Line L 2  is for the condition that the electronic device  100  includes the spacing structure  30  used in the embodiments of the present disclosure (i.e., the height of the boundary portion  312  is lower than the height of the first protrusion portion  31 A and the second protrusion portion  32 A), and line L 3  is for the condition that the spacing structure has a uniform height (i.e., there is no height variation on the first wall  31  and the second wall  32 , and the height of the first wall  31  and the height of the second wall  32  are the same). 
     In  FIG. 8 , the horizontal axis exhibits the position of each measuring point (the position of 0 mm represents the midpoint of the measuring path, for example, the midpoint of the measuring path is located at the boundary portion in  FIG. 7B ), and the vertical axis exhibits the brightness uniformity (i.e., the ratio of the brightness at each measuring point to the maximum brightness in the electronic device). As the simulation result shown in  FIG. 8 , in the electronic device  100  having the spacing structure  30  used in the embodiments of the present disclosure, the difference of brightness uniformity measured along line L 2  is smaller than the other two. That is, the electronic device  100  including the spacing structure  30  of the embodiment of the present disclosure may achieve a better light mixing. 
       FIG. 9  is a partial three-dimensional view illustrating a spacing structure  30 - 1  according to still another embodiment of the present disclosure.  FIG. 10A  is a partial side view illustrating the spacing structure  30 - 1  according to still another embodiment of the present disclosure.  FIG. 10B  is a partial top view illustrating the spacing structure  30 - 1  according to another embodiment of the present disclosure. It should be noted that some components may be omitted in  FIG. 9  to  FIG. 10B  in order to more clearly show the structure of the spacing structure  30 - 1  of the embodiment of the present disclosure. 
     The spacing structure  30 - 1  shown in  FIG. 9  to  FIG. 10B  may replace the spacing structure  30  shown in  FIG. 1  to  FIG. 3B  and may be disposed in the electronic device  100  of the embodiment of the present disclosure. 
     As shown in  FIG. 9 , the spacing structure  30 - 1  includes a plurality of first wall  31 - 1  and a plurality of second walls  32 - 1  arranged to form a grid structure, and a plurality of light-emitting elements  20  may be respectively disposed in the accommodating spaces S formed by the first walls  31 - 1  and the second walls  32 - 1 . 
     Referring to  FIG. 9  and  FIG. 10A  at the same time, in this embodiment, the first wall  31 - 1  includes a first protrusion portion  31 - 1 A and the second wall  32 - 1  includes a second protrusion portion  32 - 1 A, and the boundary portion  312  is connected to the first protrusion portion  31 - 1 A and the second protrusion portion  32 - 1 A. As shown in  FIG. 10A , the height of the boundary portion  312  is lower than the height of the first protrusion portion  31 - 1 A. Here, the height of the boundary portion  312  is defined as the minimum height of the boundary portion  312  measured from the top surface of the substrate  10  in the normal direction of the substrate  10  (i.e., the direction perpendicular to the top surface of the substrate  10 ). The height of the first protrusion portion  31 - 1 A is defined as the maximum height of the first protrusion portion  31 - 1 A measured from the top surface of the substrate  10  in the normal direction of the substrate  10 . 
     Similarly, the height of the boundary portion  312  is lower than the height of the second protrusion portion  32 - 1 A. The height of the second protrusion portion  32 - 1 A is defined as the maximum height of the second protrusion portion  32 - 1 A from the top surface of the substrate  10  in the normal direction of the substrate  10 . In some embodiments, the height of the first protrusion portion  31 - 1 A may be substantially equal to the height of the second protrusion portion  32 - 1 A, but the present disclosure is not limited thereto. 
     As shown in  FIG. 9  to  FIG. 10B , in this embodiment, the first protrusion portion  31 - 1 A includes a plurality of voids (R 4 , R 5 , R 6 ). In this embodiment, the width of the void may vary depending on the distance between the void and the light-emitting element  20 . Here, the distance between the void and the light-emitting element  20  may be defined as the shortest distance between the projection of the void on the substrate  10  and the projection of the center of the light-emitting element  20  on the substrate  10  in the top view, and the width of the void may be defined as the maximum width of the void measured in the extending direction of the wall.  FIG. 10A  and  FIG. 10B  show the voids R 4 , R 5  and R 6  between three sets of two adjacent protrusions  31 C. As shown in  FIG. 10B , the distance S 4  between the void R 4  and the light-emitting element  20  is smaller than the distance S 5  between the void R 5  and the light-emitting element  20 , and the distance S 5  between the void R 5  and the light-emitting element  20  is smaller than the distance S 6  between the void R 6  and the light-emitting element  20 ; the width W 4  of the void R 4  is smaller than the width W 5  of the void R 5 , and the width W 5  of the void R 5  is smaller than the width W 6  of the void R 6 , but the present disclosure is not limited thereto. 
     Moreover, in this embodiment, the depth of each void of the first protrusion portion  31 - 1 A may also be the same or different. In this embodiment, the depth of the void may be defined as the height difference between the bottom of the void and the top of first protrusion portion  31 - 1 A in the normal direction of the top surface of the substrate  10 . When the bottom of the void is not horizontal, the maximum depth of the void is referred to as the depth of the void. As shown in  FIG. 10A , the voids R 4 , R 5  and R 6  have depths H 4 , H 5  and H 6 , respectively, and the depth H 4  is smaller than the depth H 5 , and the depth H 5  is smaller than the depth H 6 , but the present disclosure is not limited thereto. In some embodiments, the depths of the some voids are the same, and in some other embodiments, the depths of all voids are the same. 
     Similarly, in this embodiment, the second protrusion portion  32 - 1 A may include a plurality of voids. In this embodiment, the widths and depths of the voids of the second protrusion portion  32 - 1 A are defined in the same manner as the voids R 4 , R 5 , and R 6  of the first protrusion portion  31 - 1 A, and will not be repeatedly described herein. It should be noted that in this embodiment, the widths and depths of the voids of the second protrusion portion  32 - 1 A may be varied in the same manner as the voids R 4 , R 5  and R 6 , but the present disclosure is not limited thereto. 
     In the embodiment shown in  FIG. 9  to  FIG. 10B , adjusting the widths and depths of the voids of the first protrusion portion  31 - 1 A and the second protrusion portion  32 - 1 A will help to improve the brightness uniformity in the accommodation space S. 
       FIG. 11  is a partial cross-sectional view illustrating an electronic device  101  according to one embodiment of the present disclosure. In this embodiment, the electronic device  101  includes a substrate  10 , a light-emitting element  20 , and a spacing structure  30 - 2 . As shown in  FIG. 11 , the light-emitting element  20  and the spacing structure  30 - 2  are disposed on the substrate  10 , and the spacing structure  30 - 2  is disposed adjacent to the light-emitting element  20 . 
     In this embodiment, the spacing structure  30 - 2  may include a rigid portion  33  and an elastic portion  35  which may cover a part of the outer surface of the rigid portion  33 , but the present disclosure is not limited thereto. For example, the material of the rigid portion  33  may include a highly reflective metal sheet (e.g., an aluminum sheet, a stainless-steel sheet), a highly reflective organic material, or a translucent material. In some embodiments, the material of the rigid portion  33  may include a transparent material, such as at least one of glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA), polystyrene (PS), and silicon, or a combination thereof. 
     Since the rigid portion  33  has better supporting ability, the supporting ability of the spacing structure  30 - 2  having multiple material combinations may be further improved as compared with the spacing structure completely made of the elastic material. 
       FIG. 12A  is a schematic view illustrating the structure of a rigid material according to one embodiment of the present disclosure. Since the rigid material is not easily folded, in some embodiments, a connecting member  37  may be further disposed between the two rigid portions  33  in a manner as shown in  FIG. 12A , so that the two rigid portions  33  may be connected to each other in a staggered manner. The connecting member  37  may have the same material as the rigid portion  33 , or may be made of other suitable materials. Moreover, the rigid portion  33  and the connecting member  37  may be formed as one piece, and may also be formed and connected by techniques such as welding, adhesion, or the like. The connection of the connecting member  37  and the rigid portion  33  is not limited in the present disclosure. 
       FIG. 12B  is a schematic view showing the structure of a rigid material according to another embodiment of the present disclosure. In the embodiment shown in  FIG. 12B , a support pin  39  may be further disposed on the connecting member  37  to enhance the supporting ability and the light mixing of the spacing structure  30 - 2 . It should be noted that the support pin  39  needs to be located at the first protrusion portion (or the second protrusion portion), and may have the same material as the rigid portion  33 , or may be made of other suitable materials. Moreover, the support pin  39  is not limited to the shape shown in  FIG. 12B , and may be adjusted depending on actual needs (e.g., size of the connecting member  37 , top surface area, or the like). 
       FIG. 13A  is a partial cross-sectional view illustrating an electronic device  102  according to one embodiment of the present disclosure. In this embodiment, the electronic device  102  includes a substrate  10 , a light-emitting element  20 , and a spacing structure  30 . As shown in  FIG. 13A , the light-emitting element  20  and the spacing structure  30  are disposed on the substrate  10 , and the spacing structure  30  is disposed adjacent to the light-emitting element  20 . It should be noted that the spacing structure  30  in the embodiment may also be replaced by the other spacing structures described above (e.g., the spacing structure  30 ′, the spacing structure  30 - 1 , or the spacing structure  30 - 2 ), and will not be further described herein. 
     Furthermore, in this embodiment, the electronic device  102  further includes an optical element  40  disposed on the spacing structure  30 , and the optical element  40  has the effect of changing the light path. For example, the surface of the optical element  40  is provided with prisms or other patterns that may change the light path, or particles that may refract or scatter light is added inside the optical element  40 , but the present disclosure is not limited thereto. In some embodiments, the optical element  40  may be a peg board, that is, the optical element  40  may have at least one hole  41 . In the embodiment shown in  FIG. 13A , the optical element  40  may have a plurality of holes  41 . The optical element  40  may be used to further enhance light uniformity. 
     In some embodiments, the optical element  40  may include at least one lens  43 . The lens  43  may be a semi-convex lens or a convex lens. In some embodiments, the lens  43  includes transparent materials. For example, the material of the lens  43  may include glass, epoxy resin, silicone resin, polyurethane, any other applicable material, or a combination thereof. It should be noted that although the optical element  40  includes both the holes  41  and the lens  43  in the electronic device shown in  FIG. 13A , but the present disclosure is not limited thereto. In some embodiments, the optical element  40  may include the holes  41 , but not include the lens  43 ; in other embodiments, the optical element  40  may include lens  43 , but not include the holes  41 . 
       FIG. 13B  is a partial cross-sectional view illustrating an electronic device  102 ′ according to another embodiment of the present disclosure. In this embodiment, the electronic device  102 ′ includes a substrate  10 , a light-emitting element  20 , and a spacing structure  30 . As shown in  FIG. 13B , the light-emitting element  20  and the spacing structure  30  are disposed on the substrate  10 , and the spacing structure  30  is disposed adjacent to the light-emitting element  20 . It should be noted that the spacing structure  30  in the embodiment may also be replaced by the other spacing structures described above (e.g., the spacing structure  30 ′, the spacing structure  30 - 1 , or the spacing structure  30 - 2 ), and will not be further described herein. 
     Furthermore, in this embodiment, the electronic device  102 ′ further includes an optical element  40 ′ disposed on the spacing structure  30 . In this embodiment, the optical element  40 ′ may include one of a translucent material or a transparent material (e.g., glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA), polystyrene (PS), silicon), or a combination thereof. In some embodiments, the optical element  40 ′ may include a curved bottom surface  43 ′. The curved bottom surface  43 ′ may change the direction of the light. In addition, the space formed by the bottom surface  43 ′ may also be used to accommodate a semi-convex lens or a convex lens, but the present disclosure is not limited thereto. In some embodiments, the optical element  40 ′ may not include any lens. 
       FIG. 13C  is a partial cross-sectional view illustrating an electronic device  102 ″ according to still another embodiment of the present disclosure. In this embodiment, the electronic device  102 ″ includes a substrate  10 , a light-emitting element  20 , and a spacing structure  30 . As shown in  FIG. 13C , the light-emitting element  20  and the spacing structure  30  are disposed on the substrate  10 , and the spacing structure  30  is disposed adjacent to the light-emitting element  20 . It should be noted that the spacing structure  30  in the embodiment may also be replaced by the other spacing structures described above (e.g., the spacing structure  30 ′, the spacing structure  30 - 1 , or the spacing structure  30 - 2 ), and will not be further described herein. 
     Furthermore, in this embodiment, the electronic device  102 ″ further includes an optical element  40 ″ disposed on the spacing structure  30 . Similarly, in this embodiment, the optical element  40 ″ may include one of a translucent material or a transparent material (e.g., glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA), polystyrene (PS), silicon), or a combination thereof. In some embodiments, the surface  43 ″ of the optical element  40 ″ facing the light-emitting element  20  is rough or has a specific pattern. The surface  43 ″ that is rough or has a specific pattern may further enhance the uniformity of light emitted from the light-emitting element  20 . In some embodiments, the space formed by the surface  43 ″ may also be used to accommodate a semi-convex lens or a convex lens, but the present disclosure is not limited thereto. In some embodiments, the optical element  40 ″ may not include any lens. 
     In the foregoing embodiments, the optical elements  40 ,  40 ′ or  40 ″ may also be integrated with the diffuser plate (i.e., formed as a single piece with the diffuser plate), thereby further enhancing the uniformity of light emitted by the light-emitting element  20 . Furthermore, as shown in  FIG. 13B  and  FIG. 13C , the optical element  40 ′ or  40 ″ may be disposed on the spacing structure  30  (or the spacing structure  30 ′, the spacing structure  30 - 1 , the spacing structure  30 - 2 ) and embedded into the spacing structure  30  (or the spacing structure  30 ′, the spacing structure  30 - 1 , the spacing structure  30 - 2 ), but the present disclosure is not limited thereto. 
       FIG. 14  is a partial side view illustrating the spacing structure  30 - 3  according to one embodiment of the present disclosure. In this embodiment, the spacing structure  30 - 3  may be a hollow rigid portion  33 ′. For example, the material of the hollow rigid portion  33 ′ may include a highly reflective metal sheet (e.g., an aluminum sheet, a stainless-steel sheet), a highly reflective organic material, or a translucent material. In some embodiments, the material of the hollow rigid portion  33 ′ may include a transparent material, such as at least one of glass, polycarbonate (PC), poly(methyl methacrylate) (PMMA), polystyrene (PS), silicon, or a combination thereof. 
     Since the hollow rigid portion  33 ′ reduces the usage of materials, the weight of the spacing structure  30 - 3  may be lighter. 
       FIG. 15  is a partial top view illustrating an electronic device  103  according to one embodiment of the present disclosure.  FIG. 16  is a partial cross-sectional view illustrating an electronic device  103  according to the embodiment of the present disclosure. In this embodiment, the spacing structure  30  further includes a plurality of bottom plates  30  and a plurality of position auxiliary blocks  50 , and the position auxiliary blocks  50  are disposed adjacent to the light-emitting element  20 . More specifically, the position auxiliary blocks  50  may be located in a gap between the light-emitting element  20  and the bottom plate  30 H. It should be noted that the spacing structure  30  in the embodiment may be replaced by the other spacing structures described above (e.g., the spacing structure  30 ′, the spacing structure  30 - 1 , or the spacing structure  30 - 2 ), and will not be further described herein. 
     As shown in  FIG. 15  and  FIG. 16 , in this embodiment, the position auxiliary blocks  50  may be used to fix the position of the light-emitting element  20 . The material of the position auxiliary block  50  may be the same as or different from the material of the first wall  31  and the second wall  32 . Moreover, the embodiments of the present disclosure do not limit the shape of the position auxiliary block  50  and the number of position auxiliary block  50  around each of the light-emitting elements  20 . 
     For example, the position auxiliary block  50  may also be the triangular position auxiliary block  51 , elliptical position auxiliary block  52 , polygonal position auxiliary block  53  or rectangular position auxiliary block  54  in  FIG. 15 , but the present disclosure is not limited thereto. In the embodiment of the present disclosure, the shape of each position auxiliary block  50  may be the same or different. In addition, the number of position auxiliary block  50  around the light-emitting elements  20  may be one or more, or there may be no position auxiliary block around the light-emitting elements  20 . It should be noted that in the embodiment of the present disclosure, the number of position auxiliary block around each of the light-emitting elements  20  may be the same or different. 
     Although the light-emitting elements  20  are all illustrated as a single light source in the foregoing embodiments, the present disclosure is not limited thereto.  FIG. 17A  and  FIG. 17B  are partial top views respectively illustrating an electronic device  104  and an electronic device  104 ′. The light-emitting elements  20  and  20 ′ of the electronic device  104  and the electronic device  104 ′ respectively include a plurality of light sources  21  or  21 ′. In particular, in the electronic device  104  shown in  FIG. 17A , the light-emitting element  20  includes two light sources  21 ; and in the electronic device  104 ′ shown in  FIG. 17B , the light-emitting element  20 ′ includes four light sources  21 ′. 
     It should be noted that the number and arrangement of light sources are not limited in the embodiment of the present disclosure. In some embodiments, the light-emitting elements  20  in different accommodating spaces S of the same spacing structure  30  ( 30 ′,  30 - 1 ,  30 - 2 ,  30 - 3 ) may include different numbers of light sources  21  according to the design requirements. In addition, the type of light emitted by the light source  21  is not limited in the embodiment of the present disclosure. In some embodiments, the light-emitting element  20  may include light sources  21  that emit the same color. In some embodiments, the light-emitting element  20  may include light sources  21  that emit different colors. In some embodiments, the light-emitting element  20  may include light sources  21  that emit non-visible light, such as ultraviolet (UV) or infrared (IR) light. In addition, in some embodiments, other electronic components, such as sensors, may be included in the accommodating space S of the spacing structure  30  in addition to the light-emitting element  20 . 
     Furthermore, when calculating the distance of the light-emitting element  20  from other components (e.g., the first wall  31  or the second wall  32 ), if the light-emitting element  20  includes only a single light source  21 , then the position of the center of the light-emitting element  20  may be defined as the position of the center of the single light source  21  in the top view; if the light-emitting element  20  includes a plurality of light sources  21 , the position of the center of the light-emitting elements  20  may be defined as the geometric center of the geometrical shape formed by the lines connecting the light sources  21  to each other in the top view. 
     According to the description of the foregoing embodiments, by adjusting the shape, height and the like of the spacing structure (including the first wall and the second wall), the brightness distribution in the accommodating space of the spacing structure may be more uniform without adding additional components of the electronic device (e.g., a multi-layer diffuser plate), thereby effectively reducing the thickness of the electronic device. Furthermore, the spacing structure may also be formed as a single piece with other components, to further shorten the manufacturing time and increase production efficiency. 
     The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various combinations, changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection should be determined through the claims. In addition, although some embodiments of the present disclosure are disclosed above, they are not intended to limit the scope of the present disclosure. 
     Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present disclosure should be or are in any single embodiment of the disclosure. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure. Thus, discussions of the features and advantages, and similar language, throughout this specification may, but do not necessarily, refer to the same embodiment. 
     Furthermore, the described features, advantages, and characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. One skilled in the relevant art will recognize, in light of the description herein, that the disclosure can be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the disclosure.