Multi-angle independent control AOI light source

Abstract

The application provides a multi-angle independent control AOI light source, which comprises a plurality of lamp groups arranged in layers one after another, wherein the lamp group comprises a shell, a PCBA board and a light source line; the light source line is an independent control line; the PCBA board is arranged in the shell, the light source line is connected with the PCBA board, and adjacent lamp groups are connected through the shell; the angle between the PCBA boards of adjacent lamp groups is 5-20 degrees, and the angle between the bottom lamp group and the top lamp group is 80-100 degrees. By arranging an independent control line for the lamp group, different lamp groups are controlled, the function of integrated different-angle lighting is realized, and the detection space of the light source is optimized.

Description

Technical Field

[0001] This application relates to the field of detection light source technology, and in particular to a multi-angle independently controllable AOI light source. Background Technology

[0002] In fields such as electronics manufacturing, semiconductor packaging, and display screen inspection, automated optical inspection (AOI) technology, as a highly efficient and precise non-contact inspection method, has become a core element in ensuring product quality. AOI systems acquire surface features of the object under test through optical imaging, and then analyze and identify defects using algorithms. The light source, as the core component of the AOI system, directly determines the imaging quality through its illumination angle, brightness uniformity, spectral characteristics, and controllability, thus affecting the accuracy and efficiency of defect detection.

[0003] Traditional light sources often employ a fixed-angle design, such as ring light sources, coaxial light sources, and strip light sources. Their illumination angle is singular and cannot be adjusted, making it difficult to adapt to the surface morphology of different objects being measured. For precision components with uneven surfaces or products with complex three-dimensional structures, fixed-angle light sources are prone to producing shadows, reflections, or uneven illumination, which can mask defect features and increase the risk of missed or false detections.

[0004] While some multi-angle light sources can provide multiple lighting angles, they suffer from insufficient control flexibility. Most multi-angle light sources use overall linkage adjustment, and the switching and brightness of each angle light source cannot be controlled independently. This makes it difficult to accurately match lighting conditions for different types of defects and cannot meet the all-round lighting needs of complex surfaces. Summary of the Invention

[0005] In view of the aforementioned problems, this application is made in order to provide a multi-angle independently controllable AOI light source that overcomes or at least partially solves the aforementioned problems.

[0006] This application discloses a multi-angle independently controllable AOI light source, including a plurality of lamp groups arranged in sequence. Each lamp group includes a housing, a PCBA board, and a light source line; the light source line is an independently controllable circuit. The PCBA board is disposed on the housing, the light source line is connected to the PCBA board, and adjacent light groups are connected through the housing; the angle between PCBA boards of adjacent light groups is 5-20°, and the angle between the bottom light group and the top light group is 80-100°.

[0007] Furthermore, it also includes a cover plate and a bottom shell, the bottom shell being disposed at the bottom of the bottom layer of the lamp assembly, and the cover plate being disposed at the top of the top layer of the lamp assembly.

[0008] Furthermore, the bottom of the base shell is provided with mounting holes for fixed connection with external equipment.

[0009] Furthermore, the lamp assembly is truncated cone-shaped.

[0010] Furthermore, the contact surfaces of adjacent lamp groups have the same diameter.

[0011] Furthermore, the light source line includes multi-head light source lines and single-head light source lines.

[0012] Furthermore, the PCBA board is provided with a number of LED beads, which are evenly distributed along the circumference of the PCBA board.

[0013] Furthermore, the outer casing is made of aluminum alloy or engineering plastic, and the outer surface of the outer casing is provided with heat dissipation patterns.

[0014] This application has the following advantages: In the embodiments of this application, addressing the shortcomings of existing AOI light sources, such as the inability to individually adjust the light source and the relatively fixed illumination angle, this application proposes a multi-angle independently controllable AOI light source, comprising several lamp groups stacked sequentially. Each lamp group includes a housing, a PCBA board, and a light source line; the light source line is an independently controlled circuit; the PCBA board is disposed on the housing, and the light source line is connected to the PCBA board; adjacent lamp groups are connected through the housing; the angle between the PCBA boards of adjacent lamp groups is 5-20°, and the angle between the bottom lamp group and the top lamp group is 80-100°. By setting individual control circuits for each lamp group, different lamp groups can be controlled, achieving the function of integrating different angle illumination and optimizing the detection space of the light source. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of a multi-angle independently controllable AOI light source provided in one embodiment of this application; Figure 2 This is a schematic diagram of a multi-angle independently controllable AOI light source provided in an embodiment of this application.

[0017] Explanation of reference numerals in the attached diagram: 100, PCBA board; 101, LED bead; 200, outer casing; 300, light source line; 400, bottom casing; 500, cover plate. Detailed Implementation

[0018] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] The inventors discovered through analysis of existing technologies that traditional light sources often adopt a fixed-angle design, such as ring light sources, coaxial light sources, and strip light sources. Their illumination angle is singular and cannot be adjusted, making it difficult to adapt to the surface morphology of different objects being measured. For precision components with uneven surfaces or products with complex three-dimensional structures, fixed-angle light sources are prone to producing shadows, reflections, or uneven illumination, which can mask defect features and increase the risk of missed or false detections.

[0020] Reference Figure 1-2 This paper illustrates a multi-angle independently controllable AOI light source, comprising several light groups arranged in sequence. Each light group includes a housing 200, a PCBA board 100, and a light source line 300; the light source line 300 is an independently controllable circuit. The PCBA board 100 is disposed on the housing 200, the light source line 300 is connected to the PCBA board 100, and adjacent lamp groups are connected through the housing 200; the angle between the PCBA boards 100 of adjacent lamp groups is 5-20°, and the angle between the bottom lamp group and the top lamp group is 80-100°.

[0021] It should be noted that, as Figure 1 As shown, this is an AOI light source with six light groups stacked sequentially. The bottom light group can have its PCBA board 100 directly mounted on the bottom shell 400, thus eliminating the need for the outer shell 200. Each of the remaining light groups includes an outer shell 200, a PCBA board 100, and a light source line 300 as an independent control circuit. The PCBA board 100 is mounted on the outer shell 200, and the light source line 300 is connected to the PCBA board 100 to achieve power supply and control signal transmission. The light source line 300 can also be configured as follows: Figure 1 As shown, connected to the housing 200, the PCBA board 100 is connected to the light source line 300 through the housing 200, and adjacent light groups are connected and fixed to each other through their respective housings 200; the PCBA boards 100 of adjacent light groups form an angle of 5-20°, and the total angle range of the PCBA boards 100 from the bottom light group to the top light group is 80-100°. With the independently controlled light source line 300, individual adjustment of illumination at different angles can be achieved, meeting the needs of multi-directional and precise illumination in AOI inspection.

[0022] In the embodiments of this application, addressing the shortcomings of existing AOI light sources, such as the inability to individually adjust the light source and the relatively fixed illumination angle, this application proposes a multi-angle independently controllable AOI light source, comprising several lamp groups stacked sequentially. Each lamp group includes a housing 200, a PCBA board 100, and a light source line 300; the light source line 300 is an independently controlled circuit; the PCBA board 100 is disposed on the housing 200, and the light source line 300 is connected to the PCBA board 100; adjacent lamp groups are connected through the housing 200; the angle between the PCBA boards 100 of adjacent lamp groups is 5-20°, and the angle between the bottom lamp group and the top lamp group is 80-100°. By setting individual control circuits for each lamp group, different lamp groups can be controlled, achieving the function of integrating different angle lighting and optimizing the detection space of the light source.

[0023] The following will further describe a multi-angle independently controlled AOI light source in this exemplary embodiment.

[0024] In one embodiment of this application, a cover plate 500 and a bottom shell 400 are also included. The bottom shell 400 is disposed at the bottom of the bottom layer of the lamp assembly, and the cover plate 500 is disposed at the top of the top layer of the lamp assembly.

[0025] It should be noted that the bottom shell 400 is fixedly installed at the bottom of the bottommost lamp assembly, providing a foundation for the entire light source device to support and install. The cover plate 500 is correspondingly assembled on the top of the topmost lamp assembly, which can protect the core components such as the PCBA board 100 and the light source of the topmost lamp assembly, reduce the impact of external dust, foreign objects or slight collisions on the internal components, and maintain the integrity of the overall structure.

[0026] In one embodiment of this application, the bottom of the base shell 400 is provided with a mounting hole, which is used for fixed connection with an external device.

[0027] It should be noted that the bottom shell 400 at the bottom of the bottom light assembly has mounting holes. These mounting holes can be used with conventional fasteners such as bolts and screws to achieve a stable connection with the worktable, mounting bracket or other supporting external equipment of the AOI inspection equipment. This not only ensures that the light source remains stable in position during the inspection operation and avoids the impact of vibration on the lighting accuracy, but also provides a convenient fixed structure support for the later disassembly and maintenance of the light source.

[0028] In one embodiment of this application, the lamp assembly is frustum-shaped.

[0029] It should be noted that the lamp assembly has a frustum-shaped structure, with circular top and bottom surfaces and sloping transition surfaces on the sides. This frustum-shaped design not only meets the requirement of the PCBA board 100 to evenly arrange the LED beads 101 along the circumference, but also precisely matches the frustum-shaped shells of adjacent lamp assemblies. Combined with the setting that the contact surfaces of adjacent lamp assemblies have the same diameter, it allows the multi-layer lamp assemblies to fit more tightly when stacked, avoiding light leakage or angle deviation caused by gaps. At the same time, the sloping side structure of the frustum shape can also help optimize the illumination direction of each lamp assembly, better match the angle settings of adjacent lamp assemblies, and provide more uniform and comprehensive multi-angle illumination for AOI inspection.

[0030] In one embodiment of this application, the contact surfaces of adjacent lamp groups have the same diameter.

[0031] It should be noted that the contact surface diameters of adjacent light groups are set to the same size. This ensures that adjacent light groups fit perfectly when stacked, avoiding light leakage caused by gaps due to diameter differences. It also ensures precise alignment between the light groups, preventing misalignment and ensuring the accuracy of the angle between adjacent light group PCBA boards 100, thus providing a structural basis for the overall angle coverage of the light groups from the bottom to the top layer.

[0032] In one embodiment of this application, the light source line 300 includes a multi-head light source line and a single-head light source line.

[0033] It should be noted that the single-head light source cable can connect one-to-one to the PCBA board 100 of a single lamp group, enabling individual power supply and signal transmission for a single lamp group, thus meeting the requirements for precise single-angle lighting control. The multi-head light source cable, on the other hand, can connect to the PCBA board 100 of multiple lamp groups simultaneously, adapting to scenarios requiring synchronous or group control of multiple lamp groups. This combination of two types of light source cables retains the core advantage of independent control for a single lamp group while providing flexibility for lamp group control schemes under different inspection needs, further adapting to diverse lighting adjustment scenarios in AOI inspection.

[0034] In one embodiment of this application, a plurality of LED beads 101 are provided on the PCBA board 100, and the LED beads 101 are evenly distributed along the circumference of the PCBA board 100.

[0035] It should be noted that, in conjunction with the frustum-shaped structure of the lamp assembly, the PCBA board 100 is typically designed to be circular. The circumferentially uniform distribution of the LED beads 101 ensures that when a single lamp assembly emits light, the light evenly covers the illumination range of its corresponding angle, avoiding local bright areas, dark areas, or brightness gaps, and ensuring the consistency of the output illumination of each lamp assembly. At the same time, this distribution method also allows the illumination of multiple lamp assemblies to be superimposed, resulting in a more balanced brightness of the overall multi-angle illumination, providing stable illumination conditions for AOI inspection to accurately capture scratches, foreign objects, and other defects on the surface of the object being tested.

[0036] In one embodiment of this application, the outer shell 200 is made of aluminum alloy or engineering plastic, and the outer surface of the outer shell 200 is provided with heat dissipation patterns.

[0037] It should be noted that the lamp assembly housing 200 is made of aluminum alloy or engineering plastic. Aluminum alloy has excellent thermal conductivity, which can quickly conduct the heat generated by the LED beads and PCBA board when the lamp assembly is working. Engineering plastic has the advantages of being lightweight, corrosion-resistant and cost-effective, and can be flexibly adapted to the usage scenarios of AOI inspection equipment. At the same time, the outer surface of the housing is provided with heat dissipation texture. These textures increase the contact area between the housing and the air, accelerate the convection and dissipation of heat, and effectively avoid problems such as accelerated LED light decay and decreased circuit stability of PCBA board 100 caused by long-term high temperature operation. This ensures the stable performance of the light source in continuous inspection operations and extends the overall service life.

[0038] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0039] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0040] The above provides a detailed description of a multi-angle independently controllable AOI light source provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A multi-angle independently controllable AOI light source, characterized in that, It includes several lamp groups arranged in a stacked manner, each lamp group comprising a housing, a PCBA board, and a light source line; the light source line is an independent control circuit. The PCBA board is disposed on the housing, the light source line is connected to the PCBA board, and adjacent light groups are connected through the housing; the angle between PCBA boards of adjacent light groups is 5-20°, and the angle between the bottom light group and the top light group is 80-100°.

2. The multi-angle independently controllable AOI light source according to claim 1, characterized in that, It also includes a cover plate and a bottom shell, the bottom shell being disposed at the bottom of the bottom layer of the lamp assembly, and the cover plate being disposed at the top of the top layer of the lamp assembly.

3. The multi-angle independently controllable AOI light source according to claim 2, characterized in that, The bottom of the base shell is provided with mounting holes for fixed connection with external equipment.

4. The multi-angle independently controllable AOI light source according to claim 1, characterized in that, The lamp assembly is truncated cone-shaped.

5. The multi-angle independently controllable AOI light source according to claim 4, characterized in that, The contact surfaces of adjacent lamp groups have the same diameter.

6. The multi-angle independently controllable AOI light source according to claim 1, characterized in that, The light source lines include multi-head light source lines and single-head light source lines.

7. The multi-angle independently controllable AOI light source according to claim 1, characterized in that, The PCBA board is provided with a number of LED beads, which are evenly distributed along the circumference of the PCBA board.

8. The multi-angle independently controllable AOI light source according to claim 1, characterized in that, The outer casing is made of aluminum alloy or engineering plastic, and the outer surface of the outer casing is provided with heat dissipation texture.

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