LED backlight detection device

Abstract

The utility model discloses a light-emitting diode (LED) backlight detection device, which belongs to the technical field of LED light source detection, and comprises a detection table, a supporting mechanism, a conveying assembly, an image sensing piece and at least one transmission module, the supporting mechanism is arranged on the detection table, the conveying assembly is arranged on the supporting mechanism, and two ends of the conveying assembly are respectively close to a feed port and a discharge port; the transmission module and the image sensing piece are both installed on the supporting mechanism, the transmission module is provided with an optical film located above the detection table, and the detection direction of the image sensing piece faces the optical film; the optical film is used for separating, reflecting and projecting light in a special form, so that the image sensing piece detects indexes such as uniformity of the LED backlight plate, the image sensing piece is used for converting optical images into digital signals, and the numerical signals express the optical indexes of the LED backlight plate more accurately. The problem that the uniformity and consistency of the optical effect cannot be detected by a manual visual detection method is solved, and the detection efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED light source detection, in particular to an LED backlight detection device. Background Art

[0002] Traditional TV backlight sources use LED backlight sources. With the continuous iteration of TV technology, TV products with MiniLED backlight sources have emerged. Compared with traditional LED backlight products, Mini LED has the characteristics of partitionability, ultra-high brightness, ultra-high contrast, ultra-high color gamut and ultra-long life. Therefore, TV products with Mini LED as backlight sources have emerged.

[0003] As TV products using Mini LED backlight sources enter the large-scale mass production stage, the original LED light bar inspection method (AOI) can no longer effectively control the Mini LED optical quality effect; currently, the Mini LED optical effect inspection uses manual visual inspection, but the manual visual inspection method cannot detect the uniformity and consistency of the optical effect, and the inspection efficiency is low. Utility Model Content

[0004] The utility model aims to improve the problem that the manual visual detection method cannot detect the uniformity and consistency of the optical effect and the detection efficiency is low, and provides an LED backlight detection device.

[0005] The technical solutions to achieve the above objectives include the following:

[0006] An LED backlight detection device comprises a detection platform, a support mechanism, a conveying assembly, an image sensing element and at least one transmission module, wherein the support mechanism is mounted on the detection platform, the detection platform has a feed port and a discharge port, the conveying assembly is mounted on the detection platform, and the first end of the conveying assembly is close to the feed port, and the second end of the conveying assembly is close to the discharge port;

[0007] The transmission module and the image sensing element are both installed on a supporting mechanism. The transmission module has an optical film located above the detection platform, and the detection direction of the image sensing element faces the optical film.

[0008] In one of the embodiments, the detection device also has a lifting assembly, which includes a first driving member, a guide column, and a first screw rod. The first driving member is installed on the detection platform, the guide column is installed on the supporting mechanism, and the first screw rod is installed on the output end of the first driving member. The first end of the transmission module is sleeved on the outside of the guide column and slidingly cooperates with the guide column; the second end of the transmission module is sleeved on the outside of the first screw rod and threadedly cooperates with the first screw rod; the guide column and the first screw rod are both extended along the detection direction.

[0009] In one embodiment, the supporting mechanism includes a connecting frame, a first mounting plate, and a second mounting plate, wherein the first mounting plate is mounted on the detection platform; the first end of the guide column is mounted on the first mounting plate, and the second mounting plate is mounted on the second end of the guide column; the first end of the connecting frame is sleeved on the outside of the guide column, and the image sensing element is mounted on the second end of the connecting frame.

[0010] In one embodiment, the detection device further has a movable support member, the conveying assembly has two groups, the two groups of conveying assemblies are respectively installed on both sides of the detection table, and the movable support member is located between the two groups of conveying assemblies; the movable support member includes a second driving member, a second screw rod, and a support block, the second driving member is installed on the outside of the detection table, the first end of the second screw rod passes through the detection table and is installed on the output end of the second driving member, the support block is sleeved on the outside of the second screw rod and cooperates with the second screw rod thread; the first end of the support block is against the detection table, and the second end of the support block is against the transmission module; wherein the upper end surface of the support block and the upper end surface of the conveying assembly are located on the same horizontal plane.

[0011] In one embodiment, the detection device further comprises a support plate, which is mounted on a side wall of the detection platform and is located below the optical film, and an upper end surface of the support plate and an upper end surface of the support block are located on the same horizontal plane.

[0012] In one of the embodiments, the transmission module includes a base plate, a first gear lever, a second gear lever, and a third gear lever. The base plate has a through opening. The first gear lever and the second gear lever are both installed on the base plate, and the first gear lever and the second gear lever are arranged opposite to each other. The third gear lever is installed on the base plate, and a receiving groove is formed between the first gear lever, the second gear lever and the third gear lever. The receiving groove is connected to the through opening. The optical film is detachably matched with the receiving groove, and the optical film is at least partially located at the through opening.

[0013] In one embodiment, the first gear lever or the second gear lever has a limiting groove, the limiting groove is extended along the length direction of the first gear lever or the second gear lever, the limiting groove is communicated with the accommodating groove, and the optical film is at least partially located in the limiting groove.

[0014] In one embodiment, the transmission modules include two groups, one of which is mounted on the detection platform, and the other is mounted on the lifting assembly, and the two groups are arranged along the detection direction of the image sensor.

[0015] In one embodiment, the conveying assembly includes a third driving member, a driving wheel, a driven wheel, a conveyor belt and a tensioning wheel. The third driving member is installed on the detection table, the driving wheel is installed on the output end of the third driving member, the driven wheel is rotatably installed on the detection table, the two ends of the conveyor belt are respectively connected to the driving wheel and the driven wheel, and the tensioning wheel is rotatably installed on the detection table and abuts against the conveyor belt.

[0016] In one embodiment, the detection device further comprises an indicator light and a display module. The indicator light and the display module are both mounted on a supporting mechanism, and the indicator light and the display module are electrically connected to the image sensing element, respectively.

[0017] The technical solution provided by the utility model has the following advantages and effects:

[0018] 1. By installing a conveying component on the inspection table, the two ends of the conveying component are respectively close to the feed port and the discharge port. The conveying component is used to transfer the LED backlight panel on the inspection table to realize automatic transportation of materials; moreover, an optical diaphragm is arranged on the transmission module, and the optical diaphragm is used to separate, reflect, and project special forms of light so that the image sensor can detect the uniformity of the LED backlight panel and other indicators. The image sensor is used to convert the optical image into a digital signal. The numerical signal expresses the optical indicators of the LED backlight panel more accurately, thereby improving the manual visual inspection method that cannot detect the uniformity and consistency of the optical effect, and the inspection efficiency is relatively high.

[0019] 2. The position of the transmission module in the detection direction is adjusted by using a lifting assembly to further improve the flexibility of the optical film; the first end of the transmission module is sleeved on the outside of the guide column and slidably cooperates with the guide column, the second end of the transmission module is sleeved on the first screw rod and cooperates with the first screw rod thread, the first driving member is used to drive the first screw rod to rotate, the guide column limits the transmission module to rotate with the first screw rod, the first screw rod generates friction force acting on the transmission module when rotating, the friction force drives the transmission module to move along the length direction of the first screw rod, thereby realizing the movement of the transmission module, since the first screw rod and the guide column are extended along the detection direction, the transmission module also moves along the detection direction.

[0020] 3. By setting the first mounting plate and the second mounting plate, the guide column of the lifting assembly is installed on the first mounting plate and the second mounting plate, thereby improving the stability of the guide column on the detection table, so that the movement of the reflection module on the guide column is more stable; and the image sensing component is fixed by a connecting frame.

[0021] 4. When the conveying assembly is transporting the LED backlight panel, the upper end surface of the movable support member and the upper end surface of the conveying assembly are arranged on the same horizontal plane, and the movable support member is used to support the LED backlight panel, thereby reducing the pressure of the LED backlight panel on the conveying assembly and reducing the power of the conveying assembly. Moreover, in the movable support member, the second screw is installed at the output end of the second driving member, the support block is sleeved outside the second screw and cooperates with the second screw thread, and the two ends of the support block are used to abut against the detection table and the transmission module, thereby limiting the rotation of the support block, so that the second screw drives the support block to move between the two groups of conveying assemblies, and improves the flexibility of the support block in supporting the LED backlight panel.

[0022] 5. This support plate is used to hold up the LED backlight panel and cooperate with the groove of the LED backlight panel to position and support the LED backlight panel, further improving the stability of the LED backlight panel on the test bench.

[0023] 6. In the installation of the optical film, the optical film is installed in the receiving groove, and the first gear lever, the second gear lever and the third gear lever are used to abut against the outer wall of the optical film to limit the movement of the optical film in the receiving groove, thereby improving the stability of the optical film in the receiving groove; moreover, the optical film and the receiving groove are detachably matched, which is convenient for replacing different types of optical films.

[0024] 7. By providing limiting grooves on the first gear lever and the second gear lever, after the optical film is loaded into the receiving groove, at least part of the optical film is located in the limiting groove, and the limiting groove is used to limit the upward and downward movement of the optical film, thereby further improving the stability of the optical film in the receiving groove.

[0025] 8. By arranging two sets of transmission modules in the detection direction of the image sensor, the two sets of transmission modules are used to install different types of optical films, such as anti-reflection films and filter films; they are used to reduce the surface reflection of the LED backlight panel, increase the transmittance of light, and make the image captured by the image sensor have a higher resolution.

[0026] 9. The third driving member is used to drive the driving wheel to rotate. The driving wheel, conveyor belt and driven wheel form a conveying assembly, so that when the conveyor belt moves, it drives the LED backlight panel to move on the inspection table. In addition, the tensioning wheel is used to resist the conveyor belt and adjust the friction coefficient between the conveyor belt and the driving wheel or the driven wheel to ensure that the conveyor belt is not easy to slip on the driving wheel or the driven wheel, thereby improving the stability of the conveying assembly.

[0027] 10. An indicator light and a display module are electrically connected to the image sensing element respectively. The indicator light is used to feedback the working status of the image sensing element. The display module is used to display the screen detected by the image sensing element, and display the judgment results and effect diagrams, so as to classify the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein show specific examples of the technical solutions described in the present utility model, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present utility model.

[0029] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0030] Figure 1 This is a schematic diagram of the structure of the detection device in one embodiment of the utility model. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of the detection device in one embodiment of the utility model. Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the structure of the detection device in one embodiment of the utility model. Figure 3 ;

[0033] Figure 4 This is a schematic structural diagram of a transmission module in one embodiment of the utility model;

[0034] Figure 5 It is a structural schematic diagram of a conveying assembly in one embodiment of the utility model;

[0035] Description of reference numerals:

[0036] 100. Detection device;

[0037] 1. Testing table; 11. Feed inlet; 12. Discharge outlet;

[0038] 2. Support mechanism; 21. Connecting frame; 22. First mounting plate; 23. Second mounting plate; 24. Support plate;

[0039] 3. Lifting assembly; 31. First driving member; 32. First screw rod; 33. Guide column;

[0040] 4. Transmission module; 41. Bottom plate; 42. First gear lever; 43. Second gear lever; 44. Third gear lever; 45. Through port; 46. Limiting groove; 47. Accommodating groove; 48. Optical film;

[0041] 5. Mobile support member; 51. Support block; 52. Second driving member; 53. Second screw rod;

[0042] 6. Conveying assembly; 61. Third driving member; 62. Driving wheel; 63. Driven wheel; 64. Conveying belt; 65. Tensioning wheel;

[0043] 7. Indicator light; 8. Image sensor; 9. Display module. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0045] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0046] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0048] like Figures 1 to 5As shown, an LED backlight detection device 100 includes a detection platform 1, a support mechanism 2, a conveying assembly 6, an image sensing component 8 and at least one transmission module 4, wherein the support mechanism 2 is installed on the detection platform 1, and the detection platform 1 has a feed port 11 and a discharge port 12, the conveying assembly 6 is installed on the support mechanism 2, and the first end of the conveying assembly 6 is close to the feed port 11, and the second end of the conveying assembly 6 is close to the discharge port 12; the transmission module 4 and the image sensing component 8 are both installed on the support mechanism 2, the transmission module 4 has an optical film 48 located above the detection platform 1, and the detection direction of the image sensing component 8 is toward the optical film 48; the transmission module 4 has a first moving position and a second moving position in the detection direction of the image sensing component 8. By installing a conveying assembly 6 on the detection table 1, the two ends of the conveying assembly 6 are respectively close to the feed port 11 and the discharge port 12, and the conveying assembly 6 is used to convey the LED backlight panel on the detection table 1 to realize automatic transportation of materials; and an optical film 48 is arranged on the transmission module 4, and the optical film 48 is used to separate, reflect, and project special forms of light so that the image sensor 8 can detect the uniformity and other indicators of the LED backlight panel. The image sensor 8 is used to convert the optical image into a digital signal, and the numerical signal expresses the optical indicators of the LED backlight panel more accurately, thereby improving the manual visual detection method that cannot detect the uniformity and consistency of the optical effect, and the detection efficiency is high. In addition, the transmission module 4 has a first moving position and a second moving position, so that the position of the optical film 48 is more flexible. When the position of the optical film 48 in the detection direction is different, the projected or reflected light density also has a large difference, so that different light densities can be selected according to different product detection requirements, so that the detection application range of the detection device 100 is wider.

[0049] In this embodiment, the image sensing element 8 is a CCD camera. CCD is a semiconductor device that can convert optical images into digital signals. The tiny photosensitive substances implanted on the CCD are called pixels. The more pixels a CCD contains, the higher the image resolution it provides. The function of CCD is like film, but it converts image pixels into digital signals; there are many neatly arranged capacitors on the CCD that can sense light and convert images into digital signals. Among them, the detection device 100 is mainly used for Mini LED backlight detection.

[0050] In this embodiment, the optical film 48 refers to a thin and uniform dielectric film layer attached to the surface of the optical device during the propagation path of light, and the reflection, transmission (refraction) and polarization characteristics of the layered dielectric film layers are used to achieve the desired special forms of light such as full transmission of light or full reflection of light or polarization separation of light within one or more wavelength bands.

[0051] like Figures 1 to 3 As shown, the detection device 100 also has a lifting assembly 3, which includes a first driving member 31, a guide column 33, and a first screw rod 32. The first driving member 31 is installed on the detection platform 1, the guide column 33 is installed on the support mechanism 2, and the first screw rod 32 is installed on the output end of the first driving member 31. The first end of the transmission module 4 is sleeved outside the guide column 33 and slidably matched with the guide column 33; the second end of the transmission module 4 is sleeved outside the first screw rod 32 and threadedly matched with the first screw rod 32; the guide column 33 and the first screw rod 32 are both extended along the detection direction. Through the lifting assembly 3, the projection module 4 has a first moving position and a second moving position.

[0052] In addition, by adopting the lifting assembly 3 to adjust the position of the transmission module 4 in the detection direction, the flexibility of the optical film 48 is further improved; the first end of the transmission module 4 is sleeved on the outside of the guide column 33 and slidably cooperates with the guide column 33, the second end of the transmission module 4 is sleeved on the first screw rod 32 and threadedly cooperates with the first screw rod 32, the first driving member 31 is used to drive the first screw rod 32 to rotate, the guide column 33 limits the transmission module 4 to rotate with the first screw rod 32, the first screw rod 32 generates a friction force acting on the transmission module 4 when rotating, the friction force drives the transmission module 4 to move along the length direction of the first screw rod 32, thereby realizing the movement of the transmission module 4, since the first screw rod 32 and the guide column 33 are extended along the detection direction, the transmission module 4 also moves along the detection direction.

[0053] like Figures 1 to 3 As shown, the support mechanism 2 includes a connecting frame 21, a first mounting plate 22, and a second mounting plate 23. The first mounting plate 22 is mounted on the detection platform 1; the first end of the guide column 33 is mounted on the first mounting plate 22, and the second mounting plate 23 is mounted on the second end of the guide column 33; the first end of the connecting frame 21 is sleeved outside the guide column 33, and the image sensing component 8 is mounted on the second end of the connecting frame 21. By providing the first mounting plate 22 and the second mounting plate 23, the guide column 33 of the lifting assembly 3 is mounted on the first mounting plate 22 and the second mounting plate 23, which improves the stability of the guide column 33 on the detection platform 1, thereby making the movement of the reflection module 4 on the guide column 33 more stable; and the image sensing component 8 is fixed by the connecting frame 21.

[0054] like Figures 1 to 3As shown, the detection device 100 also has a movable support member 5, and the conveying assembly 6 has two groups. The two groups of conveying assemblies 6 are respectively installed on both sides of the detection platform 1, and the movable support member 5 is located between the two groups of conveying assemblies 6; the movable support member 5 includes a second driving member 52, a second screw rod 53, and a support block 51. The second driving member 52 is installed on the outside of the detection platform 1, and the first end of the second screw rod 53 passes through the detection platform 1 and is installed on the output end of the second driving member 52. The support block 51 is sleeved on the outside of the second screw rod 53 and is threadedly matched with the second screw rod 53; the first end of the support block 51 is against the detection platform 1, and the second end of the support block 51 is against the transmission module 4; wherein, the upper end surface of the support block 51 and the upper end surface of the conveying assembly 6 are located on the same horizontal plane. When the conveying assembly 6 transports the LED backlight panel, the upper end surface of the movable support member 5 is set on the same horizontal plane as the upper end surface of the conveying assembly 6, and the movable support member 5 is used to support the LED backlight panel, thereby reducing the pressure of the LED backlight panel on the conveying assembly 6 and reducing the power of the conveying assembly 6. Moreover, in the movable support member 5, the second screw rod 53 is installed on the output end of the second driving member 52, and the support block 51 is sleeved on the outside of the second screw rod 53 and threadedly matched with the second screw rod 53. The two ends of the support block 51 are used to abut against the detection platform 1 and the transmission module 4, thereby limiting the rotation of the support block 51, so that the second screw rod 53 drives the support block 51 to move between the two groups of conveying assemblies 6, thereby improving the flexibility of the support block 51 to support the LED backlight panel. In this embodiment, the projection module 4 has two groups, and one group of the projection modules 4 is used to be fixed on the detection platform 1.

[0055] like Figure 3 As shown, the detection device 100 further comprises a support plate 24, which is mounted on the side wall of the detection platform 1 and is located below the optical film 48, and the upper end surface of the support plate 24 is located on the same horizontal plane as the upper end surface of the support block 51. The support plate 24 is used to hold up the LED backlight panel and to cooperate with the groove of the LED backlight panel, so as to realize the positioning and support of the LED backlight panel, and further improve the stability of the LED backlight panel on the detection platform 1.

[0056] like Figure 4As shown, the transmission module 4 includes a base plate 41, a first gear lever 42, a second gear lever 43, and a third gear lever 44. The base plate 41 has a through opening 45. The first gear lever 42 and the second gear lever 43 are both installed on the base plate 41, and the first gear lever 42 and the second gear lever 43 are arranged opposite to each other. The third gear lever 44 is installed on the base plate 41, and a receiving groove 47 is formed between the first gear lever 42, the second gear lever 43 and the third gear lever 44. The receiving groove 47 is communicated with the through opening 45. The optical film 48 is detachably matched with the receiving groove 47, and the optical film 48 is at least partially located at the through opening 45. In the installation of the optical film 48, the optical film 48 is installed in the receiving groove 47, and the first gear lever 42, the second gear lever 43 and the third gear lever 44 are used to abut against the outer wall of the optical film 48, so as to limit the movement of the optical film 48 in the receiving groove 47 and improve the stability of the optical film 48 in the receiving groove 47; moreover, the optical film 48 and the receiving groove 47 are detachably matched, so that different types of optical films 48 can be easily replaced.

[0057] like Figure 4 As shown, the first gear lever 42 or the second gear lever 43 has a limiting groove 46, and the limiting groove 46 is extended along the length direction of the first gear lever 42 or the second gear lever 43. The limiting groove 46 is communicated with the receiving groove 47, and the optical film 48 is at least partially located in the limiting groove 46. By providing the limiting groove 46 on the first gear lever 42 and the second gear lever 43, after the optical film 48 is loaded into the receiving groove 47, at least a part of the optical film 48 is located in the limiting groove 46, and the limiting groove 46 is used to limit the optical film 48 from moving up and down, thereby further improving the stability of the optical film 48 in the receiving groove 47.

[0058] like Figures 1 to 3 As shown, the transmission modules 4 have two groups, one of which is mounted on the detection platform 1, and the other is mounted on the lifting assembly 3, and the two groups are arranged along the detection direction of the image sensing element 8. By arranging the two groups of transmission modules 4 in the detection direction of the image sensing element 8, the two groups of transmission modules 4 are used to respectively install different types of optical films 48, such as anti-reflection films and filter films; used to reduce the surface reflection of the LED backlight plate, increase the transmittance of light, and make the image captured by the image sensing element 8 have a higher resolution.

[0059] like Figure 5As shown, the conveying assembly 6 includes a third driving member 61, a driving wheel 62, a driven wheel 63, a conveyor belt 64 and a tensioning wheel 65. The third driving member 61 is mounted on the test bench 1. The driving wheel 62 is mounted on the output end of the third driving member 61. The driven wheel 63 is rotatably mounted on the test bench 1. The two ends of the conveyor belt 64 are respectively connected to the driving wheel 62 and the driven wheel 63. The tensioning wheel 65 is rotatably mounted on the test bench 1 and abuts against the conveyor belt 64. The third driving member 61 is used to drive the driving wheel 62 to rotate. The driving wheel 62, the conveyor belt 64 and the driven wheel 63 form a conveying structure, so that when the conveyor belt 64 moves, it drives the LED backlight panel to move on the test bench 1. Moreover, the tensioning wheel 65 is used to abut against the conveyor belt 64, adjust the friction coefficient between the conveyor belt 64 and the driving wheel 62 or the driven wheel 63, ensure that the conveyor belt 64 is not easy to slip on the driving wheel 62 or the driven wheel 63, and improve the stability of the conveying assembly 6.

[0060] like Figures 1 to 3 As shown, the detection device 100 also has an indicator light 7 and a display module 9, both of which are mounted on the support mechanism 2, and are electrically connected to the image sensing element 8. The indicator light 7 and the display module 9 are electrically connected to the image sensing element 8, respectively. The indicator light 7 is used to feedback the working status of the image sensing element 8, and the display module 9 is used to display the image sensing element 8 detection screen, and display the judgment result and the effect diagram, so as to classify the product.

[0061] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0062] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the utility model, and to fully describe the technical solution, purpose and effect of the utility model. Its purpose is to make the public understand the disclosed content of the utility model more thoroughly and comprehensively, and it does not limit the protection scope of the utility model.

[0063] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. LED backlight detection device, It is characterized in that The invention comprises a detection platform, a support mechanism, a conveying component, an image sensing element and at least one transmission module, wherein the support mechanism is installed on the detection platform, the detection platform has a feed port and a discharge port, the conveying component is installed on the detection platform, and the first end of the conveying component is close to the feed port, and the second end of the conveying component is close to the discharge port; The transmission module and the image sensing element are both installed on a supporting mechanism. The transmission module has an optical film located above the detection platform, and the detection direction of the image sensing element faces the optical film.

2. The detection device according to claim 1, It is characterized in that The detection device also has a lifting assembly, which includes a first driving member, a guide column, and a first screw rod. The first driving member is installed on the detection platform, the guide column is installed on the supporting mechanism, and the first screw rod is installed on the output end of the first driving member. The first end of the transmission module is sleeved on the outside of the guide column and slidingly cooperates with the guide column; the second end of the transmission module is sleeved on the outside of the first screw rod and threadedly cooperates with the first screw rod; the guide column and the first screw rod are both extended along the detection direction.

3. The detection device according to claim 2, It is characterized in that The supporting mechanism includes a connecting frame, a first mounting plate, and a second mounting plate. The first mounting plate is mounted on the detection platform; the first end of the guide column is mounted on the first mounting plate, and the second mounting plate is mounted on the second end of the guide column; the first end of the connecting frame is sleeved on the outside of the guide column, and the image sensing element is mounted on the second end of the connecting frame.

4. The detection device according to claim 3, It is characterized in that The detection device also has a movable support member, and the conveying assembly has two groups. The two groups of conveying assemblies are respectively installed on both sides of the detection platform, and the movable support member is located between the two groups of conveying assemblies; the movable support member includes a second driving member, a second screw rod, and a support block. The second driving member is installed on the outside of the detection platform, and the first end of the second screw rod passes through the detection platform and is installed on the output end of the second driving member. The support block is sleeved on the outside of the second screw rod and cooperates with the second screw rod thread; the first end of the support block abuts against the detection platform, and the second end of the support block abuts against the transmission module; wherein the upper end surface of the support block and the upper end surface of the conveying assembly are located on the same horizontal plane.

5. The detection device according to claim 4, It is characterized in that The detection device also has a support plate, which is installed on the side wall of the detection platform and is located below the optical film. The upper end surface of the support plate and the upper end surface of the support block are located on the same horizontal plane.

6. The detection device according to claim 1, It is characterized in that The transmission module includes a base plate, a first gear lever, a second gear lever, and a third gear lever. The base plate has a through opening. The first gear lever and the second gear lever are both installed on the base plate, and the first gear lever and the second gear lever are arranged opposite to each other. The third gear lever is installed on the base plate, and a receiving groove is formed between the first gear lever, the second gear lever and the third gear lever. The receiving groove is connected to the through opening. The optical film is detachably matched with the receiving groove, and the optical film is at least partially located at the through opening.

7. The detection device according to claim 6, It is characterized in that The first gear lever or the second gear lever has a limiting groove, the limiting groove is extended along the length direction of the first gear lever or the second gear lever, the limiting groove is communicated with the accommodating groove, and the optical film is at least partially located in the limiting groove.

8. The detection device according to claim 5, It is characterized in that The transmission modules have two groups, one of which is installed on the detection platform, and the other is installed on the lifting assembly, and the two groups are arranged along the detection direction of the image sensor.

9. The detection device according to any one of claims 1 to 8, It is characterized in that The conveying assembly includes a third driving member, a driving wheel, a driven wheel, a conveyor belt and a tensioning wheel. The third driving member is installed on the detection table, the driving wheel is installed on the output end of the third driving member, the driven wheel is rotatably installed on the detection table, the two ends of the conveyor belt are respectively connected to the driving wheel and the driven wheel, and the tensioning wheel is rotatably installed on the detection table and abuts against the conveyor belt.

10. The detection device according to any one of claims 1 to 8, It is characterized in that The detection device also has an indicator light and a display module. The indicator light and the display module are both installed on the supporting mechanism, and the indicator light and the display module are electrically connected to the image sensing component respectively.

Images