A center-bore area light source

Abstract

The utility model discloses a kind of center aperture area light sources, including area light source body, the area light source body includes the first bottom plate of being arranged in lower part and the second bottom plate of being arranged in upper part, the first bottom plate is equipped with several light emitting components between second bottom plate, and several light emitting components form polygon;Several light emitting components middle part is equipped with center aperture area, and the light emitting component includes the frame of being arranged in one side, the PCB light-emitting plate of being arranged in frame one side and the diffuser plate of being arranged in PCB light-emitting plate one side;The PCB light-emitting plate includes PCB board and LED lamp pearl of being installed on PCB board;The LED lamp pearl emits light outward, through diffuser plate, irradiate in the inside or outside of product to be detected;The utility model provides a kind of center aperture area light source, the light source uses a kind of general structure, realizes the internal emission and emission of light, to reduce the design cost and manufacturing cost of light source.

Description

Technical Field

[0001] This utility model relates to the field of surface light source technology, and in particular to a surface light source with a central opening. Background Technology

[0002] As people's requirements for product quality control become more and more stringent, visual inspection is needed after each process is completed to greatly reduce the chance of errors. However, if manual inspection is used directly, it will be tedious and inefficient. Current technology often uses the combination of cameras and light sources to acquire product defects so that the control unit can make visual judgments on the acquired images, thereby completing automatic visual inspection.

[0003] However, existing products are diverse and complex in structure, with requirements for both internal and external inspection. When inspecting the exterior, the light source needs to illuminate the surface of the object being tested evenly from all sides. In this case, a surface light source with a central opening can be selected, where the central opening can be designed to accommodate the product being tested while ensuring that the light radiates evenly from all sides inward. When inspecting the internal structure of a product, the light source needs to project evenly from the inside out to highlight the structural outline and defects. In this case, the light source is placed inside the product, where the central opening can accommodate a camera lens to capture the image formed by the outward-projected light. Thus, two different light source structures need to be designed to meet the internal and external inspection requirements, leading to increased costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing light sources in the prior art, which are unable to meet the internal and external detection needs of products. It provides a centrally located light source with a simple structure, uniform light distribution, and suitability for multi-scenario detection. The light source adopts a universal structure to achieve both internal and external light emission, thereby reducing the design and manufacturing costs of the light source.

[0005] To achieve the above objectives, this utility model provides a centrally-opening surface light source, comprising a surface light source body. The surface light source body includes a first base plate disposed at the lower part and a second base plate disposed at the upper part. A plurality of light-emitting components are disposed between the first base plate and the second base plate, forming a polygon. A centrally-opening area is provided in the middle of the plurality of light-emitting components. Each light-emitting component includes a frame disposed on one side, a PCB light-emitting board disposed on one side of the frame, and a diffuser plate disposed on one side of the PCB light-emitting board. The PCB light-emitting board includes a PCB board and LED beads mounted on the PCB board. The LED beads emit light outward, which passes through the diffuser plate and illuminates the interior or exterior of the product to be tested.

[0006] Preferably, the frame is disposed outside the central opening area, the diffuser plate is disposed inside the central opening area, and the LED beads emit light outward, which passes through the diffuser plate and illuminates the outside of the product to be tested.

[0007] Preferably, the frame is disposed inside the central opening area, the diffuser plate is disposed outside the central opening area, and the LED beads emit light outward, which passes through the diffuser plate and illuminates the interior of the product to be tested.

[0008] Preferably, four light-emitting components are provided between the first base plate and the second base plate, and the four light-emitting components form a rectangle; the four light-emitting components have a central opening area that presents a rectangle in the middle.

[0009] Preferably, the frame of the light-emitting component is integrally formed or interconnected to form a rectangle; the lower part of the frame is connected to the first base plate by connecting bolts, and the lower part is connected to the second base plate by connecting bolts.

[0010] Preferably, a thermally conductive silicone pad is installed between the frame and the PCB board. The thermally conductive silicone pad is tightly attached between the frame and the PCB board to effectively conduct the heat generated by the LED beads during operation.

[0011] Preferably, the PCBs are connected in series or in parallel by conductive wires to form a unified power supply circuit; the surface light source body also includes a power line, and the frame is provided with a first groove, through which the power line passes and is electrically connected to the PCB to provide power to the LED beads and drive the LED beads to emit light.

[0012] Preferably, both the first base plate and the second base plate are provided with a second groove, which is used to accommodate the PCB board and the thermally conductive silicone pad; the first base plate and the second base plate are also provided with a third groove, which is arranged in parallel with the second groove, and is used to accommodate the diffuser plate.

[0013] Preferably, the diffuser plate includes a first diffuser plate installed on both sides and a second diffuser plate installed in the middle. The first diffuser plate has a fourth groove at both ends, and the second diffuser plate is inserted into the fourth groove at both ends.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model uses several light-emitting components to form a polygon, with a central opening area in the middle. The light-emitting components are all located at the edges of the polygon, thereby achieving uniform ring illumination. The light-emitting components include a frame on one side, a PCB light-emitting board on one side of the frame, and a diffuser plate on one side of the PCB light-emitting board. The PCB light-emitting board includes a PCB board and LED beads mounted on the PCB board. The LED beads emit light outward, which passes through the diffuser plate and illuminates the inside or outside of the product to be tested. The frame, PCB light-emitting board, and diffuser plate are arranged sequentially, which is a general structure. By using two different arrangements, the light can be emitted inward and outward, thereby reducing the design and manufacturing costs of the light source.

[0016] 2. When the frame is set outside the central opening area, and the diffuser plate is set inside the central opening area, the LED beads emit light outward, which passes through the diffuser plate and illuminates the interior of the central opening area. At this time, the product to be tested is placed inside the central opening area, and the product to be tested is illuminated by uniform ring light from the outside to the inside, illuminating the outer wall of the product to be tested.

[0017] 3. When the frame is set inside the central opening area and the diffuser plate is set outside the central opening area, the surface light source body can be placed inside the product to be tested. The LED beads emit light outward, which diffuses outward from the central opening area through the diffuser plate, achieving uniform ring lighting from the inside out, illuminating the inner wall of the product to be tested, and meeting the testing needs in different scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a centrally located light source illuminating inwards, provided by this utility model.

[0020] Figure 2 This is a schematic diagram of a structure provided by the present invention, in which a centrally located light source illuminates inward to remove a second base plate;

[0021] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is an exploded schematic diagram of a centrally located light source illuminating inwards, as provided by this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the PCB light-emitting board provided by this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the first base plate provided by this utility model;

[0025] Figure 7 This is a schematic diagram of a centrally located light source illuminating outwards, provided by this utility model.

[0026] Figure 8 This is a schematic diagram of a structure for removing a second base plate, where a centrally located light source illuminates outwards.

[0027] The diagram includes:

[0028] 1. Surface light source body; 3. First base plate; 2. Second base plate; 4. Light-emitting component; 5. Central opening area; 41. Frame; 42. PCB light-emitting board; 43. Diffuser plate; 421. PCB board; 422. LED beads; 44. Thermal conductive silicone pad; 9. Power cord; 91. First groove; 21. Second groove; 22. Third groove; 431. First diffuser plate; 432. Second diffuser plate; 433. Fourth groove. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 8 This utility model provides a centrally located surface light source.

[0031] like Figure 1 As shown, in this embodiment, the surface light source body 1 has a rectangular structure with a space in the middle, defined as the central opening area 5. In some embodiments, the central opening area 5 is used to place the product to be tested, such as small electronic components, mobile phone camera modules, or micro sensors, to facilitate the detection of the outer wall of the product. Of course, the surface light source body 1 can also be miniaturized and placed inside the product to be tested, such as inside a micro-channel or cavity, to facilitate the detection of the inner wall of the product.

[0032] like Figure 1As shown, the surface light source body 1 includes a first base plate 3 disposed at the lower part and a second base plate 2 disposed at the upper part. The first base plate 3 and the second base plate 2 have the same structure and are also rectangular structures. Furthermore, four light-emitting components 4 are provided between the first base plate 3 and the second base plate 2, and the four light-emitting components 4 form a rectangle. The four light-emitting components 4 have a central opening area 5 that presents a rectangle in the middle.

[0033] In other embodiments, three light-emitting components 4 are provided, forming a triangular layout, with the central opening area 5 also being triangular, suitable for specific optical inspection scenarios; or six light-emitting components 4 are provided, forming a hexagonal layout, with the central opening area 5 also being hexagonal, providing more uniform ring illumination, suitable for high-precision optical inspection and 3D imaging scenarios. The shape of the central opening area 5 and the layout of the light-emitting components 4 can be flexibly adjusted according to the geometric characteristics of the object under test, thereby achieving optimal illumination matching. This modular design not only improves the adaptability of the inspection but also enhances the versatility of the light source in complex industrial scenarios.

[0034] like Figure 2 and Figure 3 As shown, the light-emitting component 4 includes a frame 41 disposed on one side, a PCB light-emitting board 42 disposed on one side of the frame 41, and a diffuser plate 43 disposed on one side of the PCB light-emitting board 42. The frame 41, the PCB light-emitting board 42, and the diffuser plate 43 are arranged sequentially. When the diffuser plate 43 faces inward, the light shines inward; when the diffuser plate 43 faces outward, the light shines outward. The installation direction of the diffuser plate 43 can be flexibly adjusted according to actual testing needs to achieve internal or external illumination modes. In internal illumination mode, the light is concentrated in the central opening area 5, suitable for uniformly illuminating the outer wall of the object under test; in external illumination mode, the light diffuses outward, which can be used to illuminate the internal cavity wall of the object under test. By combining different numbers and layouts of light-emitting components 4, this invention can adapt to various sizes and shapes of objects under test, improving optical detection accuracy and efficiency.

[0035] In addition, such as Figure 5 As shown, the PCB light-emitting board 42 includes a PCB board 421 and LED beads 422 mounted on the PCB board 421; the LED beads 422 emit light outward, which is scattered by the diffuser plate 43 to form a uniform and soft surface light source illumination, illuminating the inside or outside of the product to be tested.

[0036] In one embodiment, such as Figure 2As shown, the frame 41 is disposed outside the central opening area 5, the diffuser plate 43 is disposed inside the central opening area 5, and the PCB light-emitting board 42 is disposed between the frame 41 and the diffuser plate 43. The LED beads 422 emit light outward, which passes through the diffuser plate 43 and illuminates the outside or outer wall of the product to be tested. At this time, the product to be tested can be placed inside the central opening area 5, and its outer wall can be illuminated with high uniformity through the internal illumination mode.

[0037] In one embodiment, such as Figure 8 As shown, the frame 41 is disposed inside the central opening area 5, the diffuser plate 43 is disposed outside the central opening area 5, and the PCB light-emitting board 42 is disposed between the frame 41 and the diffuser plate 43. The LED beads 422 emit light outward, which passes through the diffuser plate 43 and illuminates the inside or inner wall of the product to be tested. At this time, the surface light source body 1 can be miniaturized and placed inside the product to be tested. The light illuminates the inside or inner wall of the product to be tested, achieving uniform illumination of the internal structure of the narrow space.

[0038] In one embodiment, four light-emitting components 4 are provided between the first base plate 3 and the second base plate 2, and the four light-emitting components 4 form a rectangle; the center of the four light-emitting components 4 is provided with a central opening area 5 that presents a rectangle.

[0039] In this embodiment, the frame 41 of the light-emitting component 4 is integrally formed into a rectangle. The lower part of the frame 41 is connected to the first base plate 3 by connecting bolts, and the lower part is connected to the second base plate 2 by connecting bolts, thereby fixing and sealing the light-emitting component 4.

[0040] In other embodiments, the light-emitting component 4 has four frames 41, which are bolted together to form a rectangular structure. The frames 41 are fastened together by bolts to achieve stable assembly. At the same time, the lower part of the frame 41 is connected to the first base plate 3 by connecting bolts, and the lower part is connected to the second base plate 2 by connecting bolts.

[0041] like Figure 1 As shown, the four light-emitting components 4 are arranged in a rectangle to form a surround lighting structure, which can effectively cover the multi-angle surface of the object under test.

[0042] like Figure 2 and Figure 3As shown, to facilitate heat dissipation of the PCB board 421, a thermally conductive silicone pad 44 is installed between the frame 41 and the PCB board 421. The thermally conductive silicone pad 44 is tightly fitted between the frame 41 and the PCB board 421, effectively conducting the heat generated by the LED beads 422 during operation. The installation of the thermally conductive silicone pad 44 significantly improves heat dissipation efficiency, ensuring that the LED beads 422 maintain stable light output during continuous operation and avoiding light decay or device damage due to excessive temperature.

[0043] In this embodiment, four PCBs 421 are independently arranged, each corresponding to one of the four light-emitting components 4. Each PCB 421 integrates an LED bead 422, which can be connected to an external driving circuit through independent wiring to achieve individual control and adjustment. This design not only improves the flexibility of the light source layout but also facilitates the adjustment of the brightness and illumination angle of each area according to different detection requirements, further improving imaging quality and detection accuracy. By independently controlling the LED bead 422 on each PCB 421, local supplementary lighting or zoned extinguishing can be achieved, adapting to the three-dimensional contour illumination of complex workpieces.

[0044] Furthermore, the surface light source body 1 also includes a power line 9. The frame 41 is provided with a first groove 91. The power line 9 passes through the first groove 91 and is electrically connected to the PCB board 421 to provide power to the LED beads 422 and drive the LED beads 422 to emit light. The power line 9 integrates an analog signal interface, supports PWM dimming, and is easy to integrate into an automatic control system to realize real-time brightness adjustment.

[0045] like Figure 6 As shown, the first base plate 3 and the second base plate 2 have the same structure, both having a second groove 21 on them. The second groove 21 is used to accommodate the PCB board 421 and the thermal conductive silicone pad 44. The first base plate 3 and the second base plate 2 also have a third groove 22, which is arranged side by side with the second groove 21. The third groove 22 is used to accommodate the diffuser plate 43. The upper and lower second grooves 21 cooperate with each other to limit and fix the PCB board 421 and the thermal conductive silicone pad 44. Similarly, the third grooves 22 cooperate with each other to limit and fix the diffuser plate 43.

[0046] In this embodiment, as Figure 3 As shown, in order to tightly connect the diffuser plates 43, the diffuser plate 43 includes a first diffuser plate 431 installed on both sides and a second diffuser plate 432 installed in the middle. There are two of each of the first diffuser plate 431 and the second diffuser plate 432. The first diffuser plate 431 has a fourth groove 433 at both ends, and the second diffuser plate 432 is inserted into the fourth groove 433 at both ends to achieve a tight splicing between adjacent diffuser plates 43.

[0047] like Figures 1 to 6 As shown, the assembly steps of the surface light source body 1 are as follows:

[0048] Step S1: Install the LED beads 422 on the PCB board 421 to form the PCB light-emitting board 42, and attach the thermal conductive silicone pad 44 to the back of the PCB board 421 to enhance heat dissipation performance.

[0049] Step S2: Place the frame 41 on the outside of the first base plate 3, and embed the PCB light-emitting board 42 with the thermal conductive silicone pad 44 attached into the second groove 21 on the first base plate 3. Multiple PCB light-emitting boards 42 are electrically connected to each other. The power line 9 passes through the first groove 91 and is electrically connected to the PCB board 421 to provide power to the LED beads 422 and drive the LED beads 422 to emit light.

[0050] Step S3: The two ends of the second diffuser plate 432 are inserted into the fourth grooves 433 at both ends of the first diffuser plate 431 to achieve a tight splicing between adjacent diffuser plates 43; and the diffuser plate 43 is placed on the third groove 22;

[0051] Step S4: Place the second base plate 2 on the upper part of the frame 41. The lower part of the frame 41 is connected to the first base plate 3 by connecting bolts, and the lower part is connected to the second base plate 2 by connecting bolts, thereby fixing and sealing the light-emitting component 4 and completing the assembly of the surface light source body 1.

[0052] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A light source with a centrally located aperture, characterized in that: The light source includes a surface light source body (1), which includes a first base plate (3) at the bottom and a second base plate (2) at the top. A plurality of light-emitting components (4) are provided between the first base plate (3) and the second base plate (2), and the plurality of light-emitting components (4) form a polygon. A central opening area (5) is provided in the middle of the plurality of light-emitting components (4). The light-emitting components (4) include a frame (41) on one side, a PCB light-emitting board (42) on one side of the frame (41), and a diffuser plate (43) on one side of the PCB light-emitting board (42). The PCB light-emitting board (42) includes a PCB board (421) and LED beads (422) mounted on the PCB board (421). The LED beads (422) emit light outward, which passes through the diffuser plate (43) and illuminates the inside or outside of the product to be tested.

2. A centrally located aperture surface light source according to claim 1, characterized in that: The frame (41) is set outside the central opening area (5), the diffuser plate (43) is set inside the central opening area (5), and the LED beads (422) emit light outward, which passes through the diffuser plate (43) and illuminates the outside of the product to be tested.

3. A centrally located aperture surface light source according to claim 1, characterized in that: The frame (41) is set inside the central opening area (5), the diffuser plate (43) is set outside the central opening area (5), and the LED beads (422) emit light outward, which passes through the diffuser plate (43) and illuminates the inside of the product to be tested.

4. A centrally located aperture surface light source according to claim 1, characterized in that: Four light-emitting components (4) are provided between the first base plate (3) and the second base plate (2), and the four light-emitting components (4) form a rectangle; a central opening area (5) presenting a rectangle is provided in the middle of the four light-emitting components (4).

5. A centrally located aperture surface light source according to claim 4, characterized in that: The frame (41) in the light-emitting component (4) is integrally formed or interconnected to form a rectangle; the lower part of the frame (41) is connected to the first base plate (3) by connecting bolts, and the lower part is connected to the second base plate (2) by connecting bolts.

6. A centrally located aperture surface light source according to claim 4, characterized in that: A thermally conductive silicone pad (44) is installed between the frame (41) and the PCB board (421). The thermally conductive silicone pad (44) is tightly attached between the frame (41) and the PCB board (421) to effectively conduct the heat generated by the LED beads (422) when they are working.

7. A centrally located aperture surface light source according to claim 4, characterized in that: The PCB boards (421) are connected in series or in parallel by conductive lines to form a unified power supply circuit; the surface light source body (1) also includes a power line (9), the frame (41) is provided with a first groove (91), the power line (9) passes through the first groove (91) and is electrically connected to the PCB board (421) to provide power to the LED beads (422) and drive the LED beads (422) to emit light.

8. A centrally located aperture surface light source according to claim 6, characterized in that: The first base plate (3) and the second base plate (2) are provided with a second groove (21), which is used to accommodate the PCB board (421) and the thermal conductive silicone pad (44); the first base plate (3) and the second base plate (2) are also provided with a third groove (22), which is arranged in parallel with the second groove (21), and is used to accommodate the diffuser plate (43).

9. A centrally located aperture surface light source according to claim 8, characterized in that: The diffuser plate (43) includes a first diffuser plate (431) installed on both sides and a second diffuser plate (432) installed in the middle. The first diffuser plate (431) has a fourth groove (433) at both ends, and the second diffuser plate (432) is inserted into the fourth groove (433) at both ends.

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