Screen flatness detection device

Abstract

The utility model relates to the field of detection equipment, and discloses a screen flatness detection device which comprises a rack, a workpiece carrying table, a light source generator, a reflection assembly, a detection plate and a visual detection assembly. The workpiece carrying table is arranged on the rack and is used for carrying a screen to be tested; the light source generator is arranged on the rack and located over the workpiece carrying table, and the light source generator is used for emitting at least two light source beams which are arranged in parallel at intervals to the screen to be tested on the workpiece carrying table; the reflection assembly and the detection plate are arranged on the rack, the reflection assembly reflects a light source beam reflected by a to-be-detected screen to the same side face of the detection plate, and at least two light rings are formed on the detection plate; the visual detection assembly is arranged on the rack, faces the backlight side of the detection plate and is used for collecting the diameters of the apertures and calculating the diameter difference value of the apertures. The screen flatness detection device provided by the utility model can solve the problem of how to visualize the flatness detection result of the screen.

Description

Technical Field

[0001] The utility model relates to the field of detection equipment, and particularly relates to a screen flatness detection device. Background Art

[0002] With the development of electronic technology, various electronic products with screens have been successively produced. Among them, the flatness error of the screen is one of the important indicators for evaluating the quality of electronic products.

[0003] In order to facilitate large-scale detection of the flatness of the screen, the prior art provides a screen flatness detection device, which includes a product fixture module and a sensor module. The sensor module is installed parallel to the upper part of the product fixture module. The sensor module is connected to a height adjustment module. The sensor module includes a bracket and sensors installed around and in the middle of the bracket. The position distribution of the sensors matches the size of the product to be measured on the product fixture module.

[0004] When using this screen flatness detection device, through simultaneous measurement by multiple sensors distributed at different positions, the flatness of the screen can be detected. However, the sensors cannot visualize the detection results and cannot meet the user's need to intuitively see the detection results. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The utility model provides a screen flatness detection device, and the technical problem that can be solved at least is: how to visualize the flatness detection results of the screen.

[0007] (2) Technical Solutions

[0008] To solve the above technical problems, the utility model provides the following technical solutions: A screen flatness detection device, comprising:

[0009] A frame;

[0010] A workpiece stage, which is arranged on the frame and is used for carrying the screen to be measured;

[0011] A light source generator, which is arranged on the frame and is located directly above the workpiece stage. The light source generator is used to emit at least two parallel and spaced light source beams to the screen to be measured on the workpiece stage;

[0012] A reflection component and a detection board arranged on the frame. The reflection component is used to reflect the light source beams reflected by the screen to be measured onto the same side of the detection board and form at least two light circles on the detection board;

[0013] A visual detection component, which is arranged on the frame and faces the backlight side of the detection board. The visual detection component is used to collect the diameters of the light circles and calculate the diameter differences of the light circles.

[0014] Further setting: The aforementioned reflection component includes at least one mirror, which is rotatably and / or slidably arranged on the frame to adjust the position of the mirror relative to the frame. A first fixing member is provided between the mirror and the frame, and the first fixing member is used to fix the mirror and the frame after adjusting the position of the mirror relative to the frame.

[0015] Further setting: The aforementioned visual detection component includes a CCD camera, a controller, and a display screen. The controller is electrically connected to the CCD camera and the display screen respectively. The lens of the CCD camera is vertically oriented towards one side of the backlight of the detection plate, and is used to collect the aperture diameter on the detection plate and send it to the controller. The controller is used to calculate the diameter difference of each aperture, and the display screen is used to display the collected image of the CCD camera, as well as the calculation and judgment results of the controller.

[0016] Further setting: The aforementioned frame includes a working darkroom, and the workpiece carrier, light source generator, reflection component, detection plate, and CCD camera are all located in the working darkroom.

[0017] Further setting: The aforementioned frame is provided with a material port for connecting the working darkroom and the external environment. The screen flatness detection device further includes a first driving member. The workpiece carrier is slidably arranged on the frame. The first driving member is arranged on the frame and is connected to the workpiece carrier. The first driving member is used to drive the workpiece carrier to move, so as to move the screen into or out of the working darkroom through the material port.

[0018] Further setting: The aforementioned frame is provided with a material port for connecting the working darkroom and the external environment. The screen flatness detection device further includes:

[0019] A material table, which is slidably arranged on the frame and is used to carry the screen;

[0020] A first driving member, which is arranged on the frame and is connected to the material table. The first driving member is used to drive the material table to move, so as to move the screen into or out of the working darkroom through the material port.

[0021] A second driving assembly, which is arranged on the frame and is used to grab the screen to be measured on the material table and move it to the workpiece carrier, and at the same time grab the measured screen on the workpiece carrier and move it to the material table.

[0022] Further setting: The aforementioned second driving assembly includes:

[0023] Two suction cups, which are respectively opposite to the material table and the workpiece carrier in the working darkroom, and are used to synchronously adsorb or release the screens on the material table and the workpiece carrier;

[0024] A rotation driving member, which is connected to the two suction cups and is used to drive the two suction cups to exchange positions;

[0025] The lifting drive member is arranged on the frame and connected to the rotary drive member, and is used to drive the two suction cups to move up and down towards or away from the material table and the workpiece carrier.

[0026] (III) Advantageous Effects

[0027] Compared with the prior art, a screen flatness detection device provided by the present utility model has the following advantageous effects:

[0028] When the screen flatness detection device provided by the present utility model is used, first, the screen to be detected is placed on the workpiece carrier. Then, the light source generator is turned on to emit at least two parallel light source beams onto the surface of the screen to be detected. The light source beams are reflected from the surface of the screen to the reflection assembly, and then reflected by the reflection assembly and projected onto the same side of the detection board. Each light source beam forms an aperture on this side. Since the surface of the screen is actually uneven, the reflection angles of the light source beams at different positions on the surface of the screen to be detected are different, and thus the diameters of the apertures formed by the projection of the light source beams on the detection board are also correspondingly different. The visual detection component collects the diameters of the apertures formed by the projection of the light source beams and calculates the diameter difference between the apertures. The larger the diameter difference, the more uneven the surface of the screen is. In this way, the diameter difference is inversely proportional to the flatness of the screen, and the flatness of the screen can be judged whether it is qualified through this diameter difference, achieving the function of detecting the flatness of the screen. It can be seen that during the use of the screen flatness detection device, the staff can directly see the sizes of the apertures formed by the projection of a plurality of light source beams emitted by the light source generator after being reflected by the screen and the reflection assembly through the detection board and the visual detection component, and judge whether the flatness of the screen is qualified, so that the flatness detection result of the screen is visualized, meeting the user's need to intuitively see the flatness detection result. Description of the Drawings

[0029] Figure 1 It is a three-dimensional view of the screen flatness detection device in the embodiment;

[0030] Figure 2 It is a three-dimensional view of the working darkroom of the screen flatness detection device in the embodiment;

[0031] Figure 3 It is a rear view of the workpiece carrier, the reflection assembly, the detection board and the CCD camera in the embodiment.

[0032] Reference Numerals in the Drawings:

[0033] 1. Frame; 11. Working Darkroom; 12. Material Opening;

[0034] 2. Workpiece Carrier; 3. Light Source Generator;

[0035] 4. Reflection component; 41. Reflector; 411. First reflector; 412. Second reflector; 413. Third reflector; 42. First fixing member;

[0036] 5. Detection plate;

[0037] 6. Visual detection component; 61. CCD camera; 62. Display screen;

[0038] 7. Screen;

[0039] 81. First driving member; 82. Material table; 821. Limit block; 822. Positioning groove; 823. Scale line; 83. Second driving assembly; 831. Suction cup; 832. Rotary driving member; 833. Lifting driving member; 84. Third driving member. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] The present invention provides a screen flatness detection device for solving the problem of how to visualize the flatness detection result of the screen 7.

[0042] Refer to Figure 2 and Figure 3 as shown, Figure 2 is a three-dimensional view inside the working darkroom 11 of the screen flatness detection device in the embodiment, Figure 3 is a rear view of the workpiece stage, reflection component, detection plate and CCD camera in the embodiment. The screen flatness detection device includes a frame 1, a workpiece stage 2, a light source generator 3, a reflection component 4, a detection plate 5 and a visual detection component 6.

[0043] The workpiece stage 2 is installed on the frame 1 and is used to carry the screen 7 to be measured.

[0044] The light source generator 3 is installed on the frame 1 and is located directly above the workpiece stage 2. The light source generator 3 is used to emit at least two parallel and spaced light source beams to the screen 7 to be measured on the workpiece stage 2.

[0045] Both the reflection component 4 and the detection plate 5 are installed on the frame 1. The reflection component 4 is used to reflect the light source beams reflected by the screen 7 to be measured onto the same side of the detection plate 5 and form at least two light circles on the detection plate 5.

[0046] The vision detection component 6 is installed on the frame 1 and faces the backlight side of the detection board 5. The vision detection component 6 is used to collect the aperture diameters on the detection board 5 and calculate the diameter differences of the respective apertures to determine the flatness of the screen 7.

[0047] When the screen flatness detection device of the above technical solution is in use, first place the screen 7 to be measured on the workpiece stage 2. Then, turn on the light source generator 3 and emit a number of parallel light source beams to different positions on the surface of the screen 7 to be measured simultaneously (the light source beams are obliquely irradiated on the screen 7 along the Figure 3 direction of the arrow in the figure). The light source beams are reflected from the surface of the screen 7 to be measured to the reflection component 4 and then reflected by the reflection component 4 and projected onto the detection board 5. Each light source beam is reflected and projected onto the same side of the detection board 5, and an aperture is formed by each projection on this side. Theoretically, the aperture diameters formed by projecting a number of parallel light source beams onto the detection board 5 after being reflected by the same surface should be the same. However, since the surface of the screen 7 is actually uneven, the reflection angles of each light source beam at different positions on the surface of the screen 7 to be measured are different, which in turn causes the aperture diameters formed by projecting each light source beam onto the detection board 5 to be correspondingly different. The vision detection component 6 collects the aperture diameters formed by projecting each light source beam and calculates the diameter differences of the respective apertures. The larger this diameter difference, the more uneven the surface of the screen 7 is. In this way, this diameter difference is inversely proportional to the flatness of the screen 7, and the flatness of the screen 7 can be determined whether it is qualified through this diameter difference, achieving the function of detecting the flatness of the screen 7. It can be seen that during the use of this screen flatness detection device, the staff can directly see the size of the aperture formed by projecting a number of light source beams emitted by the light source generator 3 after being reflected by the screen 7 and the reflection component 4 through the detection board 5 and the vision detection component 6, and judge whether the flatness of the screen 7 is qualified, so that the flatness detection result of the screen 7 is visualized, meeting the user's need to intuitively see the flatness detection result.

[0048] A thin piece of paper can be attached to the light-facing side of the above detection board 5, or the above detection board 5 can use an opaque board such as frosted glass. In this way, not only can the light source beams not pass through the detection board 5 and an aperture can be formed on the detection board 5, but also the vision detection component 6 can collect the diameter of the aperture on the detection board 5 on the backlight side of the detection board 5.

[0049] The above light source generator 3 can be formed by combining a plurality of existing point light sources in an array distribution. The more light source beams emitted by the light source generator 3 to the surface of the screen 7 (that is, the more detection points), and the wider the irradiation positions are distributed on the screen 7, the more accurate the overall flatness detection result of the screen 7 is. And the irradiation direction of the above light source generator 3 forms an angle with the tabletop of the workpiece stage 2.

[0050] The above-mentioned light source generator 3 and the workpiece stage 2 can be fixedly arranged on the frame 1, or can be detachably or slidably arranged on the frame 1, so as to adjust the relative positions of the light source generator 3 and the workpiece stage 2, thereby enabling the position or angle of the light source beam irradiated on the screen 7 to be adjusted. The above-mentioned reflection assembly 4, the detection board 5 and the vision detection assembly 6 can also be fixedly or detachably and adjustably arranged on the frame 1, and the specific installation method can be designed according to actual working requirements.

[0051] Referring to Figure 2 As shown, in one embodiment of the reflection assembly 4, the reflection assembly 4 includes at least one reflecting mirror 41, and the reflecting mirror 41 is rotatably and / or slidably mounted on the frame 1 to adjust the position of the reflecting mirror 41 relative to the frame 1. A first fixing member 42 is installed between the reflecting mirror 41 and the frame 1, and the first fixing member 42 is used to fix the reflecting mirror 41 and the frame 1 after adjusting the position of the reflecting mirror 41 relative to the frame 1. In this way, by removing or loosening the first fixing member 42, if the reflecting mirror 41 is rotatably mounted on the frame 1, the position of the reflecting mirror 41 relative to the frame 1 can be adjusted steplessly, thereby adjusting the rotation angle of the reflecting mirror 41 relative to the workpiece stage 2 steplessly. If the reflecting mirror 41 is slidably mounted on the frame 1, the position of the reflecting mirror 41 relative to the frame 1 can be adjusted steplessly, thereby adjusting the moving position of the reflecting mirror 41 relative to the workpiece stage 2 steplessly. One of these two structures can be selected, or both can be provided. Both of these two structures can conveniently adjust the position of the reflection assembly 4 relative to the workpiece stage 2 to reflect the light source beam reflected by the screen 7 to be measured onto the same side of the detection board 5.

[0052] The above-mentioned reflecting mirror 41 can also use a damping structure instead of the first fixing member 42. In this way, without disassembling, installing or tightening the first fixing member 42, the position of the reflection assembly 4 relative to the workpiece stage 2 can be directly adjusted, and the operation is simple and fast.

[0053] Referring to Figure 3 As shown, in this embodiment, the reflecting mirror 41 is successively set as a first reflecting mirror 411, a second reflecting mirror 412 and a third reflecting mirror 413 according to the reflection path. Among them, the first reflecting mirror 411 is inclined and distributed above the workpiece stage 2, and the second reflecting mirror 412 and the third reflecting mirror 413 are vertically distributed on both sides of the first reflecting mirror 411, and the third reflecting mirror 413 is opposite to the detection board 5 in position.

[0054] Referring to Figure 1 、 Figure 2 and Figure 3As shown, in an embodiment of the visual detection component 6, the visual detection component 6 includes a CCD camera 61, a controller, and a display screen 62. The controller is electrically connected to the CCD camera 61 and the display screen 62 respectively. The lens of the CCD camera 61 is vertically oriented towards the backlit side of the detection plate 5, and is used to collect the aperture diameter on the detection plate 5 and send it to the controller (not shown in the figure). The controller is used to calculate the diameter difference of each aperture to determine the flatness of the screen 7. The display screen 62 is used to display the collected image of the CCD camera 61, as well as the calculation and judgment results of the controller. In this way, the screen flatness detection device can automatically detect and determine whether the flatness of the screen 7 is qualified through the CCD camera 61 and the controller. Combining with the display screen 62 can make the flatness detection result of the screen 7 visual, clearer, and convenient for users to intuitively see the flatness detection result and the judgment process.

[0055] The above-mentioned CCD camera 61, controller, and display screen 62 can use existing CCD cameras 61, controllers, and display screens 62.

[0056] The above-mentioned CCD camera 61 and the detection plate 5 can be fixedly installed on the frame 1, and the other can be slidably installed on the frame 1, or both can be slidably installed on the frame 1, so as to adjust the distance between the CCD camera 61 and the detection plate 5, and further adjust the detection range of the CCD camera 61.

[0057] Refer to Figure 1 and Figure 2 As shown, Figure 1 is a three-dimensional view of the screen flatness detection device in the embodiment. On the basis of the above embodiment, the frame 1 includes a working darkroom 11, and the workpiece carrier 2, the light source generator 3, the reflection component 4, the detection plate 5, and the CCD camera 61 are all located in the working darkroom 11. In this way, the entire flatness detection process is carried out in the sealed and light-tight environment provided by the working darkroom 11, which greatly reduces the interference of other light on the detection process, thereby further improving the accuracy of the screen 7 flatness detection result.

[0058] On the basis of detecting the flatness of the screen 7 in the working darkroom 11, the rack 1 is provided with a material inlet 12 for connecting the working darkroom 11 and the external environment. The screen flatness detection device further includes a first driving member 81. The workpiece stage 2 is slidably mounted on the rack 1. The first driving member 81 is mounted on the rack 1 and is connected to the workpiece stage 2 by screwing or welding. The first driving member 81 is used to drive the workpiece stage 2 to move so as to move the screen 7 into or out of the working darkroom 11 through the material inlet 12. In this way, when the screen flatness detection device is in use, the to-be-detected screen 7 on the workpiece stage 2 can be automatically moved into the working darkroom 11 by the first driving member 81 for flatness detection. After detection, the detected screen 7 can be automatically moved out of the working darkroom 11 by the first driving member 81 so that the user can replace it with the next to-be-detected screen 7. The user does not need to manually open and close the working darkroom 11 throughout the process, saving the time for manually opening and closing the working darkroom 11 and further improving the work efficiency.

[0059] Refer to Figure 1 and Figure 2 As shown in the figure, on the basis of detecting the flatness of the screen 7 in the working darkroom 11, the rack 1 is provided with a material inlet 12 for connecting the working darkroom 11 and the external environment. The screen flatness detection device further includes a material stage 82, a first driving member 81 and a second driving assembly 83. The material stage 82 is slidably mounted on the rack 1 and is used for carrying the screen 7. The first driving member 81 is mounted on the rack 1 and is connected to the material stage 82 by screwing or welding. The first driving member 81 is used to drive the material stage 82 to move so as to move the screen 7 into or out of the working darkroom 11 through the material inlet 12. The second driving assembly 83 is mounted on the rack 1 and is used to grab the to-be-detected screen 7 on the material stage 82 and move it to the workpiece stage 2, and at the same time grab the detected screen 7 on the workpiece stage 2 and move it to the material stage 82. In this way, when the screen flatness detection device is in use, the to-be-detected screen 7 on the material stage 82 can be automatically moved into the working darkroom 11 by the first driving member 81. The second driving assembly 83 can grab the to-be-detected screen 7 on the material stage 82 and the detected screen 7 on the workpiece stage 2 at the same time and exchange their positions. After the position exchange, the flatness of the to-be-detected screen 7 on the workpiece stage 2 can be detected. At the same time, the detected screen 7 on the material stage 82 can be moved out by the first driving member 81 and replaced with the next to-be-detected screen 7, and the above steps are repeated. It can be seen that the screen flatness detection device not only saves the time for manually opening and closing the working darkroom 11 through the first driving member 81 and the second driving assembly 83, but also can synchronize the loading and unloading process and the detection process. Compared with the previous embodiment, the effect of improving the work efficiency in this embodiment is better.

[0060] The above-mentioned first driving member 81 can use existing linear modules or linear displacement devices such as cylinders.

[0061] Refer to Figure 2As shown, in an embodiment of the second driving component 83, the second driving component 83 includes a suction cup 831, a rotation driving member 832, and a lifting driving member 833. There are two suction cups 831, which are respectively opposite to the material table 82 and the workpiece stage 2 in the working darkroom 11, and are used to synchronously adsorb or release the screens 7 on the material table 82 and the workpiece stage 2. The rotation driving member 832 is connected to the two suction cups 831 and is used to drive the two suction cups 831 to exchange positions. The lifting driving member 833 is installed on the frame 1 and is connected to the rotation driving member 832, and is used to drive the two suction cups 831 to move up and down towards or away from the material table 82 and the workpiece stage 2. In this way, when the screen flatness detection device is in use, first, the first driving member 81 drives the material table 82 and the to-be-tested screen 7 thereon to move into the working darkroom 11 from the material port 12. At this time, the two suction cups 831 are respectively opposite to the material table 82 and the workpiece stage 2. The lifting driving member 833 drives the suction cup 831 to descend to adsorb the screen 7 and then ascend, driving the to-be-tested screen 7 to leave the material table 82, and at the same time driving the tested screen 7 to leave the workpiece stage 2. Then, the rotation driving member 832 drives the suction cup 831 to rotate, thereby driving the to-be-tested screen 7 to move above the workpiece stage 2, and at the same time driving the tested screen 7 to move above the material table 82. Then the lifting driving member 833 drives the suction cup 831 to descend again to release the screen 7, placing the to-be-tested screen 7 on the workpiece stage 2 and the tested screen 7 on the material table 82, and then ascending back to the original position. Finally, the first driving member 81 drives the material table 82 and the tested screen 7 thereon to move out of the working darkroom 11 from the material port 12 so as to replace it with the next to-be-tested screen 7. It can be seen that the screen flatness detection device can automatically replace the to-be-tested screen 7 and the tested screen 7 through the cooperation of the lifting driving member 833 and the rotation driving member 832, enabling the two processes of the loading and unloading process and the detection process to be carried out synchronously.

[0062] The above rotation driving member 832 can use a rotation driving device such as a stepping motor, and the above lifting driving member 833 can use an existing linear module or a linear displacement device such as a cylinder.

[0063] Refer to Figure 2 As shown, on the basis that the workpiece stage 2 is slidably installed on the frame 1, the screen flatness detection device further includes a third driving member 84. The third driving member 84 is installed on the frame 1 and is connected to the workpiece stage 2, and is used to drive the workpiece stage 2 to displace relative to the light source generator 3. In this way, the position of the workpiece stage 2 can be automatically adjusted through the third driving member 84.

[0064] The above third driving member 84 can use one or two existing linear modules or linear displacement devices such as cylinders. One can adjust the front and back position of the workpiece stage 2, and the other can adjust the left and right position of the workpiece stage 2.

[0065] Refer to Figure 1 and Figure 2As shown, on the basis that the first driving member 81 is connected to the workpiece stage 2 or the material table 82, at least three limiting blocks 821 are slidably connected to the workpiece stage 2 or the material table 82. A positioning groove 822 for positioning the screen 7 is formed between the limiting blocks 821. Scale lines 823 are also distributed on the workpiece stage 2 or the material table 82. In this way, by sliding the limiting blocks 821, the feeding position of the screen 7 to be measured on the workpiece stage 2 or the material table 82 can be positioned for quick feeding. Combining with the scale lines 823, the positions of the limiting blocks 821 can be accurately adjusted, and further the feeding position of the screen 7 to be measured can be accurately adjusted.

[0066] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screen flatness detection device, characterized in that Comprising: A frame; A workpiece stage, arranged on the frame and used for carrying the screen to be measured; A light source generator, arranged on the frame and located directly above the workpiece stage, the light source generator is used to emit at least two parallel and spaced light source beams to the screen to be measured on the workpiece stage; A reflection component and a detection plate arranged on the frame, the reflection component is used to reflect the light source beams reflected by the screen to be measured onto the same side of the detection plate and form at least two light circles on the detection plate; A vision detection component, arranged on the frame and facing the backlight side of the detection plate, the vision detection component is used to collect the diameters of the light circles and calculate the diameter differences of each light circle.

2. The flatness detection device for a screen according to claim 1, characterized in that, The reflection component includes at least one reflecting mirror, the reflecting mirror is rotatably and / or slidably arranged on the frame to adjust the position of the reflecting mirror relative to the frame, and a first fixing member is arranged between the reflecting mirror and the frame, the first fixing member is used to fix the reflecting mirror and the frame after adjusting the position of the reflecting mirror relative to the frame.

3. The flatness detection device for a screen according to claim 1, wherein, The vision detection component includes a CCD camera, a controller and a display screen, the controller is electrically connected to the CCD camera and the display screen respectively, the lens of the CCD camera is vertically oriented towards the backlight side of the detection plate, used to collect the diameters of the light circles on the detection plate and send them to the controller, the controller is used to calculate the diameter differences of each light circle, and the display screen is used to display the collected images of the CCD camera and the calculation and judgment results of the controller.

4. A screen flatness detection device according to claim 3, characterized in that, The frame includes a working darkroom, and the workpiece stage, light source generator, reflection component, detection plate and CCD camera are all located in the working darkroom.

5. A screen flatness detection device according to claim 4, characterized in that, A material inlet for communicating the working darkroom and the external environment is arranged on the frame, the screen flatness detection device further includes a first driving member, the workpiece stage is slidably arranged on the frame, the first driving member is arranged on the frame and connected to the workpiece stage, and the first driving member is used to drive the workpiece stage to move so as to move the screen into or out of the working darkroom through the material inlet.

6. A screen flatness detection device according to claim 4, characterized in that, A material inlet for communicating the working darkroom and the external environment is arranged on the frame, and the screen flatness detection device further includes: A material table, slidably arranged on the frame and used for carrying the screen; A first driving member, arranged on the frame and connected to the material table, the first driving member is used to drive the material table to move so as to move the screen into or out of the working darkroom through the material inlet; A second driving component, arranged on the frame, used to grab the screen to be measured on the material table and move it to the workpiece stage, and at the same time grab the measured screen on the workpiece stage and move it to the material table.

7. The flatness detection device for a screen according to claim 6, wherein The second driving component includes: Two suction cups, respectively opposite to the material table and the workpiece stage in the working darkroom, used to synchronously adsorb or release the screens on the material table and the workpiece stage; A rotation driving member, connected to the two suction cups, used to drive the two suction cups to exchange positions; A lifting driving member is provided on the frame and is connected to the rotary driving member, and is used to drive the two suction cups to move up and down towards or away from the material table and the workpiece carrier.

Images