Light source assembly and silicon wafer sorting machine

Abstract

The light source assembly comprises a light homogenizing plate, a box body, a first light source and a second light source, the light homogenizing plate is provided with a first central area and a peripheral area at least partially surrounding the first central area, the box body covers the light homogenizing plate, and the box body is provided with a second central area opposite to the first central area; the first light source is arranged in the box body and located in the second central area, the second light source is arranged in the box body and located in the second peripheral area, and the luminous intensity of the second light source is smaller than that of the first light source. According to the light source assembly, the luminous intensity of the first light source irradiating the first central area of the light uniformizing plate is relatively high, and the luminous intensity of the second light source irradiating the first peripheral area of the light uniformizing plate is relatively low, so that the internal space of the box body is more stably and uniformly irradiated; and the use requirement of the sorting machine is met on the premise that the number of the light sources is low.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell manufacturing equipment, and in particular to a light source assembly and a silicon wafer sorting machine. Background Art

[0002] Monocrystalline silicon solar cells are solar cells that use high-purity monocrystalline silicon rods as raw materials. In the production process of monocrystalline silicon solar cells, the monocrystalline silicon rods need to be cut into silicon wafers. After being made into raw silicon wafers through processes such as polishing, cleaning, and sorting, the raw silicon wafers are then sorted for quality based on surface dirt, hidden cracks, etc. using a sorting machine.

[0003] However, the illumination efficiency of the light source assembly inside the sorting machine in the related art is low and it is difficult to meet the usage requirements. Utility Model Content

[0004] Based on this, it is necessary to provide a light source component and a silicon wafer sorting machine to address the problem that the light source component inside the sorting machine has low irradiation efficiency and is difficult to meet usage requirements.

[0005] According to one aspect of the present application, an embodiment of the present application provides a light source assembly, including: a light homogenizing plate, having a first central area and a first peripheral area at least partially surrounding the first central area; a box body, which is covered on the light homogenizing plate, and the box body has a second central area opposite to the first central area, and a second peripheral area at least partially surrounding the second central area; a first light source, arranged in the box body and located in the second central area; and a second light source, arranged in the box body and located in the second peripheral area, the luminous intensity of the second light source is less than the luminous intensity of the first light source.

[0006] In one embodiment, the luminous flux of the first light source on the surface of the light diffuser is greater than or equal to 580 lm and less than or equal to 1100 lm; the luminous flux of the second light source on the surface of the light diffuser is greater than or equal to 27 lm and less than or equal to 40 lm.

[0007] In one embodiment, the light source assembly further includes a first bracket, which is fixed in the box and located in the second central area. The first bracket has a first mounting surface facing the light diffuser, and the first light source is mounted on the first mounting surface.

[0008] In one of the embodiments, the first mounting surface is inclined relative to the surface of the light diffuser plate, and an angle between the first mounting surface and the surface of the light diffuser plate is greater than or equal to 15° and less than or equal to 30°.

[0009] In one embodiment, the light source assembly includes two first light sources; the light source assembly includes two first brackets, the two first brackets are arranged to be spaced apart from each other along the width direction of the surface of the light diffuser, and a first light source is provided on the first mounting surface of each first bracket.

[0010] In one embodiment, the light source assembly further includes a second bracket, which is fixed in the box and located in the second peripheral area. The second bracket has a second mounting surface facing the light diffuser, and the second light source is mounted on the second mounting surface.

[0011] In one of the embodiments, the second mounting surface is inclined relative to the surface of the light diffuser plate, and an angle between the second mounting surface and the surface of the light diffuser plate is greater than or equal to 45° and less than or equal to 60°.

[0012] In one embodiment, the light source assembly includes multiple second light sources; the light source assembly includes two second brackets, the two second brackets are arranged at intervals from each other along the width direction of the surface of the light diffuser, and at least two second light sources are arranged side by side on the second mounting surface of each second bracket.

[0013] In one embodiment, the first light source and the second light source each include at least one light bar extending along the length direction of the surface of the light diffuser; and / or the light diffuser is made of organic glass.

[0014] According to another aspect of the present application, an embodiment of the present application further provides a silicon wafer sorting machine, comprising: a light source assembly as described above.

[0015] The above-mentioned light source assembly and silicon wafer sorting machine, by setting a first light source in the second central area of ​​the box body, setting a second light source in the second peripheral area of ​​the box body, and making the luminous intensity of the second light source smaller than the luminous intensity of the first light source, in this way, the setting positions of the first light source and the second light source are more reasonable, the luminous intensity of the first light source irradiated on the first central area of ​​the light homogenizing plate is relatively high, and the luminous intensity of the second light source irradiated on the first peripheral area of ​​the light homogenizing plate is relatively low, thereby achieving more stable and uniform illumination of the internal space of the box body, and meeting the use requirements of the sorting machine under the premise of a low number of light sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a light source assembly provided in one embodiment of the present application.

[0017] Figure 2 A cross-sectional view of the overall structure of a light source assembly provided in one embodiment of the present application.

[0018] Figure 3 A schematic diagram of the structure of a light homogenizer in a light source assembly provided in one embodiment of the present application.

[0019] Figure 4 A schematic structural diagram of a first light source in a light source assembly provided in one embodiment of the present application.

[0020] Figure 5A schematic diagram of the structure of a second light source in a light source assembly provided in one embodiment of the present application.

[0021] The reference numerals in the specific implementation manner are as follows:

[0022] 10: Light source assembly;

[0023] 100: light diffuser, 110: first central area, 120: first peripheral area;

[0024] 200: box body, 210: second central area, 220: second peripheral area;

[0025] 300: first light source, 310: first light bar;

[0026] 400: second light source, 410: second light bar;

[0027] 500: first bracket, 510: first mounting surface;

[0028] 600: second bracket, 610: second mounting surface. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0035] In the related art, the light source assembly inside the sorting machine has the problem of low irradiation efficiency. In order to improve the irradiation efficiency of the light source assembly and improve the stability and uniformity of the lighting, it is necessary to increase the number of light sources. However, too many light sources will cause the temperature inside the entire light source box to be too high, which will in turn cause problems such as reduced light source life and accelerated aging of the light-through plate. In addition, too many light sources will also increase the structural complexity of the light source assembly, making it difficult to replace the light source.

[0036] Figure 1 FIG. 1 shows a schematic diagram of the overall structure of a light source assembly 10 provided in one embodiment of the present application. Figure 2 FIG. 1 shows a cross-sectional view of the overall structure of a light source assembly 10 provided in one embodiment of the present application. Figure 3 A schematic structural diagram of a light homogenizing plate 100 in a light source assembly 10 provided in one embodiment of the present application is shown.

[0037] To at least partially address the above issues, see Figures 1 to 3 The embodiment of the present application provides a light source assembly 10, which includes a light diffuser 100, a housing 200, a first light source 300, and a second light source 400. The light diffuser 100 has a first central area 110 and a first peripheral area 120 that at least partially surrounds the first central area 110. The housing 200 is covered on the light diffuser 100. The housing 200 has a second central area 210 that is opposite to the first central area 110, and a second peripheral area 220 that at least partially surrounds the second central area 210. Figure 2 In the perspective of the illustrated embodiment, the shape and coverage of the second central area 210 remain the same as the shape and coverage of the first central area 110, the shape and coverage of the second peripheral area 220 remain the same as the shape and coverage of the first peripheral area 120, the first light source 300 is disposed in the box 200 and is located in the second central area 210, the second light source 400 is disposed in the box 200 and is located in the second peripheral area 220, and the luminous intensity of the second light source 400 is less than the luminous intensity of the first light source 300.

[0038] The light homogenizing plate 100 is an optical element that can use the light scattering effect of nanoparticles dispersed on its surface to convert the light emitted by a point light source or a line light source into surface light, so that the light is evenly scattered by the light source. The light homogenizing plate 100 can make the light uniform and prevent the generation of obvious light spots, dark areas and color differences. The light homogenizing plate 100 can be cut into different sizes according to the use requirements, and can also be spliced ​​for use, so its specific size is not limited. The light homogenizing plate 100 can be made of materials such as organic glass (PMMA, Polymethyl methacrylate), PC (Polycarbonate, polycarbonate), PETG (Poly (ethylene terephthalateco-1, 4-cylclohexylenedimethylene terephthalate), poly (ethylene terephthalate-1, 4-cyclohexadiene dimethylene terephthalate)), etc. The surface color of the light homogenizing plate 100 can correspond to the color of the light emitted by the light source. For example, the surface color of the light homogenizing plate 100 can be milky white.

[0039] The light diffuser 100 has a first central area 110 and a first peripheral area 120 that at least partially surrounds the first central area 110. The first central area 110 is an area on the light diffuser 100 that is relatively closer to its geometric center, and its specific shape and size are not limited. The first peripheral area 120 is an area on the light diffuser 100 that is relatively closer to its physical boundaries, and its specific shape and size are also not limited. According to the difference in the specific position areas of the first central area 110 and the first peripheral area 120 on the light diffuser 100, the first peripheral area 120 is located on opposite sides of the first central area 110 in one direction or multiple directions, and surrounds the first central area 110.

[0040] For example, in Figure 3 In the embodiment shown, the surface shape of the light diffuser 100 is a rectangle, the first central area 110 is located at the center of the rectangle, and the first peripheral area 120 is located in the direction of the first central area 110 in the direction of the long side of the rectangle ( Figure 3 The first central area 110 is surrounded by the first central area 110. That is, in this embodiment, the light diffuser 100 can be formed on the long side of the rectangular area on the surface of the light diffuser 100 ( Figure 3 The first peripheral region 120 is provided on both sides of the left and right directions in the horizontal direction. In some other embodiments, the first peripheral region 120 can also be provided on the short side direction ( Figure 3 The first peripheral area 120 is provided on both sides of the first central area 110 (in the vertical direction) and surrounds the first central area 110. In other embodiments, the first peripheral area 120 can also be provided on the long side direction (in the vertical direction) of the rectangular area on the surface of the light diffuser 100. Figure 3 ) and the short side direction ( Figure 3 A first peripheral area 120 is provided on both sides (in the up and down direction) and surrounds the first central area 110.

[0041] The box 200 is covered on the light homogenizing plate 100 to form a partially enclosed space for light gathering, and can also protect the light homogenizing plate 100, the first light source 300 and the second light source 400. The box 200 has a second central area 210 opposite to the first central area 110, and a second peripheral area 220 at least partially surrounding the second central area 210. Similarly, the second central area 210 is an area on the box 200 that is relatively closer to its geometric center, and its specific shape and size are not limited, while the second peripheral area 220 is an area on the box 200 that is relatively closer to its physical boundaries, and its specific shape and size are also not limited. According to the difference in the specific position areas of the second central area 210 and the second peripheral area 220 on the box 200, the second peripheral area 220 is located on opposite sides of the second central area 210 in one direction or multiple directions, and surrounds the second central area 210. Furthermore, the second central region 210 is disposed opposite to the first central region 110, and the second peripheral region 220 is disposed opposite to the first peripheral region 120. Figure 2 In the illustrated embodiment, the second central region 210 and the first central region 110 are arranged relative to each other in a direction perpendicular to the surface of the light diffuser 100, and the second peripheral region 220 and the first peripheral region 120 are arranged relative to each other in a direction perpendicular to the surface of the light diffuser 100. In other embodiments, depending on the structure of the housing 200, the relative direction angles of the second central region 210 and the first central region 110 may be different, and the relative direction angles of the second peripheral region 220 and the first peripheral region 120 may be different, which are not specifically limited here.

[0042] The first light source 300 in the light source assembly 10 is arranged in the second central area 210 of the box 200, and the second light source 400 is arranged in the second peripheral area 220 of the box 200. The luminous intensity of the second light source 400 is less than the luminous intensity of the first light source 300. Therefore, the luminous intensity of the first light source 300 irradiated on the first central area 110 of the light homogenizing plate 100 is relatively high, and the luminous intensity of the second light source 400 irradiated on the first peripheral area 120 of the light homogenizing plate 100 is relatively low, thereby achieving more stable and uniform illumination of the internal space of the box 200.

[0043] The light source assembly 10 of the embodiment of the present application sets a first light source 300 in the second central area 210 in the box body 200, sets a second light source 400 in the second peripheral area 220 in the box body 200, and makes the luminous intensity of the second light source 400 smaller than the luminous intensity of the first light source 300. In this way, the setting positions of the first light source 300 and the second light source 400 are more reasonable, the luminous intensity of the first light source 300 irradiated on the first central area 110 of the light homogenizing plate 100 is relatively high, and the luminous intensity of the second light source 400 irradiated on the first peripheral area 120 of the light homogenizing plate 100 is relatively low, thereby achieving more stable and uniform illumination of the internal space of the box body 200, and meeting the use requirements of the sorting machine under the premise of a low number of light sources. Compared with the prior art, the light source assembly 10 in the embodiment of the present application has a small number of light sources, which will not cause the temperature inside the box 200 to be too high. Therefore, the life of the first light source 300, the second light source 400 and the light homogenizing plate 100 in the embodiment of the present application is relatively higher, and the overall structure of the light source assembly 10 is relatively simpler, which facilitates the replacement of the first light source 300 and the second light source 400.

[0044] As described above, the luminous intensity of the second light source 400 is less than the luminous intensity of the first light source 300. In some embodiments, optionally, the luminous flux of the first light source 300 on the surface of the light homogenizer 100 is greater than or equal to 580 lm and less than or equal to 1100 lm. Exemplarily, the luminous flux of the first light source 300 on the surface of the light homogenizer 100 can be 580 lm, 600 lm, 720 lm, 940 lm, 1000 lm, 1100 lm, etc. The above data are only used as examples. In actual embodiments, the luminous flux of the first light source 300 on the surface of the light homogenizer 100 is not limited to the above data. Luminous flux refers to the radiant power that can be felt by the human eye. It is equal to the product of the radiant energy of a certain band per unit time and the relative visibility of the band. It is an indicator used to measure how much light a light source outputs. The larger the luminous flux, the more light the light source outputs.

[0045] Similarly, the luminous flux of the second light source 400 on the surface of the light homogenizing plate 100 is greater than or equal to 27 lm and less than or equal to 40 lm. Exemplarily, the luminous flux of the second light source 400 on the surface of the light homogenizing plate 100 can be 27 lm, 30 lm, 35 lm, 38 lm, 40 lm, etc. The above data are only used as examples. In actual embodiments, the luminous flux of the second light source 400 on the surface of the light homogenizing plate 100 is not limited to the above data. It can be seen that the luminous flux of the second light source 400 on the surface of the light homogenizing plate 100 is less than the luminous flux of the first light source 300 on the surface of the light homogenizing plate 100, and therefore, the luminous intensity of the second light source 400 is less than the luminous intensity of the first light source 300.

[0046] The first light source 300 in the light source assembly 10 is disposed in the second central area 210 of the housing 200. Figure 2 In some embodiments, optionally, the light source assembly 10 further includes a first bracket 500, the first bracket 500 is fixed in the box 200 and is located in the second central area 210, the first bracket 500 has a first mounting surface 510 facing the light diffuser 100, and the first light source 300 is mounted on the first mounting surface 510. That is, by setting the first bracket 500, the side of the first bracket 500 that is away from the first mounting surface 510 is fixed to the second central area 210 in the box 200, the first mounting surface 510 of the first bracket 500 is arranged facing the light diffuser 100, and the first light source 300 is installed on the first mounting surface 510, so that the first light source 300 is arranged in the second central area 210 of the box 200.

[0047] Please continue reading Figure 2 In some embodiments, optionally, the first mounting surface 510 is tilted relative to the surface of the light diffuser 100, and the angle between the first mounting surface 510 and the surface of the light diffuser 100 is greater than or equal to 15° and less than or equal to 30°. By way of example, the angle α1 between the first mounting surface 510 and the surface of the light diffuser 100 can be 15°, 18°, 21°, 25°, 27°, 30°, etc. The above data are only examples, and α1 is not limited to the above data in actual embodiments. By adjusting the tilt angle of the first mounting surface 510 relative to the surface of the light diffuser 100, the irradiation angle of the first light source 300 mounted on the first surface relative to the light diffuser 100 can be changed, and the light irradiation effect in the box 200 can be changed to meet different usage requirements.

[0048] In order to make the light in the box 200 more uniform, in some embodiments, the light source assembly 10 optionally includes two first light sources 300, and the light source assembly 10 includes two first brackets 500, which are arranged spaced apart from each other along the width direction of the surface of the light diffuser 100, and a first light source 300 is arranged on the first mounting surface 510 of each first bracket 500. Figure 2 As shown, the two first brackets 500 are arranged at intervals from each other along the width direction of the surface of the light homogenizing plate 100, and a first light source 300 is provided on the first mounting surface 510 of each first bracket 500. By adjusting the positions of the two first brackets 500 and the inclination angles of the first mounting surfaces 510 on the two first brackets 500, the two first light sources 300 can be symmetrically arranged along the symmetry axis of the box body 200 in the width direction of the surface of the light homogenizing plate 100, thereby improving the uniformity of light from the two first light sources 300.

[0049] The second light source 400 in the light source assembly 10 is disposed in the second peripheral area 220 of the housing 200. Figure 2 In some embodiments, optionally, the light source assembly 10 further includes a second bracket 600, the second bracket 600 is fixed in the box 200 and is located in the second peripheral area 220, the second bracket 600 has a second mounting surface 610 facing the light diffuser 100, and the second light source 400 is mounted on the second mounting surface 610. In other words, by setting the second bracket 600, the side of the second bracket 600 that is away from the second mounting surface 610 is fixed to the second peripheral area 220 in the box 200, the second mounting surface 610 of the second bracket 600 is arranged facing the light diffuser 100, and the second light source 400 is mounted on the second mounting surface 610, so that the second light source 400 is arranged in the second peripheral area 220 of the box 200.

[0050] Please continue reading Figure 2 In some embodiments, optionally, the second mounting surface 610 is tilted relative to the surface of the light diffuser 100, and the angle between the second mounting surface 610 and the surface of the light diffuser 100 is greater than or equal to 45° and less than or equal to 60°. By way of example, the angle α2 between the second mounting surface 610 and the surface of the light diffuser 100 can be 45°, 47°, 50°, 52°, 55°, 60°, etc. The above data are only examples, and α2 is not limited to the above data in actual embodiments. By adjusting the inclination angle of the second mounting surface 610 relative to the surface of the light diffuser 100, the irradiation angle of the second light source 400 mounted on the second surface relative to the light diffuser 100 can be changed, and the light irradiation effect in the box 200 can be changed to meet different usage requirements.

[0051] In order to make the light in the box 200 more uniform, in some embodiments, the light source assembly 10 optionally includes a plurality of second light sources 400, and the light source assembly 10 includes two second brackets 600, which are arranged spaced apart from each other along the width direction of the surface of the light diffuser 100, and at least two second light sources 400 are arranged side by side on the second mounting surface 610 of each second bracket 600. Figure 2 As shown, the two second brackets 600 are arranged at intervals from each other along the width direction of the surface of the light homogenizing plate 100, and a second light source 400 is provided on the second mounting surface 610 of each second bracket 600. By adjusting the positions of the two second brackets 600 and the inclination angles of the second mounting surfaces 610 on the two second brackets 600, the two second light sources 400 can be symmetrically arranged along the symmetry axis of the box body 200 in the width direction of the surface of the light homogenizing plate 100, thereby improving the light uniformity of the two second light sources 400.

[0052] Figure 4 FIG. 1 shows a schematic structural diagram of a first light source 300 in a light source assembly 10 provided in an embodiment of the present application. Figure 5A schematic structural diagram of a second light source 400 in a light source assembly 10 provided in one embodiment of the present application is shown.

[0053] Please combine Figure 2 Also see Figure 4 and Figure 5 In some embodiments, optionally, the first light source 300 and the second light source 400 each include at least one light bar extending along the length direction of the surface of the light diffuser 100. Each light bar may be provided with a plurality of lamp beads of varying numbers. Figure 4 In the embodiment shown, 75 strong light beads can be arranged on the first light bar 310 in the first light source 300. Figure 5 In the illustrated embodiment, 50 low-light lamp beads may be arranged on the second light bar 410 of the second light source 400. In other embodiments, the first light source 300 may further include a plurality of first light bars 310 arranged side by side, and the second light source 400 may further include a plurality of second light bars 410 arranged side by side, and the number of lamp beads on the first light bar 310 or the second light bar 410 may also be other numbers.

[0054] In some embodiments, the light homogenizing plate 100 is optionally made of organic glass. Organic glass is a polymer compound formed by the polymerization of methyl methacrylate, also known as acrylic, Zhongxuan acrylic, and acrylic. Organic glass has good transparency, chemical stability, mechanical properties, weather resistance, easy dyeing, easy processing, and beautiful appearance. The light homogenizing plate 100 made of organic glass can better make the light uniform and prevent the generation of obvious light spots, dark areas, and color differences.

[0055] An embodiment of the present application further provides a silicon wafer sorting machine, which includes a light source assembly 10 as in any one of the above embodiments.

[0056] The raw silicon wafers used to make monocrystalline silicon solar cells need to be quality sorted, and this process is completed in the sorting machine. In the process of contamination testing the raw silicon wafers, it is necessary to use a camera to take pictures of the surface of the raw silicon wafers, and then the system will judge the pictures of the raw silicon wafers. In order to make each image clear, consistent, complete, and without ghosting, it is necessary to fill the raw silicon wafers with light, so the light source assembly 10 is needed in the sorting machine. In the sorting machine using the light source assembly 10 in any of the above embodiments of the present application, the first light source 300 and the second light source 400 are more reasonably arranged, and the luminous intensity of the first light source 300 irradiated on the first central area 110 of the light-homogenizing plate 100 is relatively high, and the luminous intensity of the second light source 400 irradiated on the first peripheral area 120 of the light-homogenizing plate 100 is relatively low, so as to achieve more stable and uniform irradiation of the internal space of the box 200, and meet the use requirements of the sorting machine under the premise of a low number of light sources.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A light source assembly, It is characterized in that include: A light diffuser having a first central region and a first peripheral region at least partially surrounding the first central region; A box body, which is covered on the light-diffusing plate, and has a second central area opposite to the first central area, and a second peripheral area at least partially surrounding the second central area; A first light source is disposed in the housing and located in the second central area; and The second light source is disposed in the housing and located in the second peripheral area, and the luminous intensity of the second light source is less than the luminous intensity of the first light source.

2. The light source assembly according to claim 1, It is characterized in that The luminous flux of the first light source on the surface of the light diffuser is greater than or equal to 580 lm and less than or equal to 1100 lm; The luminous flux of the second light source on the surface of the light diffuser is greater than or equal to 27 lm and less than or equal to 40 lm.

3. The light source assembly according to claim 1, It is characterized in that The light source assembly further includes a first bracket, which is fixed in the box and located in the second central area. The first bracket has a first mounting surface facing the light diffuser, and the first light source is mounted on the first mounting surface.

4. The light source assembly according to claim 3, It is characterized in that The first mounting surface is inclined relative to the surface of the light diffuser plate, and an angle between the first mounting surface and the surface of the light diffuser plate is greater than or equal to 15° and less than or equal to 30°.

5. The light source assembly according to claim 3, It is characterized in that The light source assembly includes two of the first light sources; The light source assembly includes two first brackets, which are spaced apart from each other along the width direction of the surface of the light diffuser plate, and one of the first light sources is disposed on the first mounting surface of each of the first brackets.

6. The light source assembly according to claim 1, It is characterized in that The light source assembly also includes a second bracket, which is fixed in the box and located in the second peripheral area. The second bracket has a second mounting surface facing the light diffuser, and the second light source is mounted on the second mounting surface.

7. The light source assembly according to claim 6, It is characterized in that The second mounting surface is inclined relative to the surface of the light diffuser plate, and an angle between the second mounting surface and the surface of the light diffuser plate is greater than or equal to 45° and less than or equal to 60°.

8. The light source assembly according to claim 6, It is characterized in that The light source assembly includes a plurality of the second light sources; The light source assembly includes two second brackets, which are spaced apart from each other along the width direction of the surface of the light diffuser plate, and at least two second light sources are arranged side by side on the second mounting surface of each second bracket.

9. The light source assembly according to claim 1, It is characterized in that The first light source and the second light source each include at least one light bar extending along the length direction of the surface of the light diffuser; and / or The light homogenizing plate is made of organic glass.

10. A silicon wafer sorting machine, It is characterized in that include: A light source assembly as claimed in any one of claims 1 to 9.

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