Display screen brightness detection device

Abstract

The invention relates to the technical field of display screen brightness detection, in particular to a display screen brightness detection device which comprises two conveying mechanisms, a transfer mechanism is arranged between the tops of the two conveying mechanisms, the transfer mechanism comprises a transmission seat, a plurality of first air cylinders are fixed to the bottom of the transmission seat, organ suction cups are fixed to the output ends of the first air cylinders, and the organ suction cups are fixed to the bottom of the transmission seat. A detection mechanism is fixed between the two conveying mechanisms, the detection mechanism comprises a base, a [-shaped plate is slidably connected to the interior of the base, and a plurality of brightness meters are fixed to one side of the [-shaped plate. According to the invention, a plurality of brightness meter detection probes which are relatively fixed in traditional positions are designed into a form capable of rotating in different directions, so that the detection probes on the brightness meter can directly face different areas of display screens with different appearances when the brightness of a straight-surface display screen or a curved-surface display screen is detected; and meanwhile, the brightness detection device is suitable for detecting the brightness of a straight-surface display screen or a curved-surface display screen.

Description

Technical Field

[0001] The invention relates to the technical field of display screen brightness detection, and in particular to a display screen brightness detection device. Background Art

[0002] During the production process of display screens, there may be potential quality problems such as uneven brightness and pixel necrosis. In order to prevent the outflow of products with substandard brightness, it is necessary to test the brightness of the display screen. Currently, the most commonly used testing method is to use a brightness meter to test the brightness of the display screen after power is turned on. In order to allow the light of the display screen to correctly enter the optical measurement system of the brightness meter, the detection probe of the brightness meter needs to be facing the display screen during the testing process to ensure the accuracy of the measurement results.

[0003] Display screens mainly include two types: flat screens and curved screens. When detecting the brightness of a flat screen, although multiple detection probes on a detection device can detect the brightness of the display screen directly, when switching from detecting the brightness of a flat screen to detecting the brightness of a curved screen, it is not easy for the detection probes on most detection devices to automatically adjust the detection position of the detection probes according to the arc shape of the curved screen, resulting in large limitations in the detection device for detecting the brightness of the display screen. In addition, in the process of using a brightness meter to detect the brightness of the display screen, it is not easy to simultaneously detect whether the brightness meter itself is damaged due to long-term work, thereby indirectly affecting the accuracy of the display screen brightness measurement results. Summary of the invention

[0004] The purpose of the present invention is to provide a display screen brightness detection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A display screen brightness detection device, comprising:

[0007] There are two conveying mechanisms, both used for conveying the display screen;

[0008] The transfer mechanism is arranged on the top of the two conveying mechanisms, and the transfer mechanism includes a guide rail, and the bottom of the guide rail is screwed with a transmission seat, and the bottom of the transmission seat is fixed with a plurality of cylinders, and the output end of the cylinder is fixed with an accordion suction cup;

[0009] A power-on mechanism, fixed on one side of the guide rail, is used to automatically connect both the external power cable and the video cable to the display screen;

[0010] The detection mechanism is fixed between two conveying mechanisms. The detection mechanism includes a base. Inside the base, a U-shaped plate is screwed and driven. On one side of the U-shaped plate, a plurality of luminance meters are equally spaced and fixed. The luminance meters are connected to detection probes through cables. On the top surface of the base, two double-headed cylinders are fixed. Both output ends of the double-headed cylinders are meshed and driven with gears. The middle of the U-shaped plate and the outside of the gears are fixedly connected to the detection probes at corresponding positions.

[0011] Furthermore: At the top of the bellows suction cup, a hollow column is connected and fixed in communication. The hollow column is fixedly connected to the output end of the first cylinder, and the hollow column is fixedly connected in communication with an external negative pressure pump.

[0012] Furthermore: Inside the guide rail, a first lead screw that is rotationally connected to the transmission seat is rotated. One end of the guide rail is fixed with a first motor for driving the first lead screw to rotate. Both ends of the guide rail are fixed with two third supports.

[0013] Furthermore: At both ends of the base, second lead screws are rotated. At both ends of the U-shaped plate, transmission blocks that are screwed and connected to the corresponding second lead screws are fixed. At both ends of the base, second motors for driving the second lead screws to rotate are fixed.

[0014] Furthermore: At both output ends of the double-headed cylinder, racks are fixed. The racks are meshed and driven with the corresponding gears, and the gears are rotationally connected to the U-shaped plate.

[0015] Furthermore: At the middle position inside the U-shaped plate, a partition plate that is fixed to the corresponding detection probe is fixed. At both ends of the inner bottom surface of the U-shaped plate, pads are fixed. The pads are slidably connected to the racks.

[0016] Furthermore: A support mechanism is provided on the top of the base. The support mechanism includes:

[0017] Support plates, two in number, are both fixed on the top of the base;

[0018] Moving plates, two in number, are both slidably connected between the two support plates;

[0019] A third lead screw, which is a bidirectional lead screw, is rotationally connected to the top of one support plate. The third lead screw is screwed and connected to the two moving plates.

[0020] Furthermore: At one end of one support plate, a third motor is fixed. The output end of the third motor is fixedly connected to the third lead screw.

[0021] Furthermore: The power-on mechanism includes a bracket. At the bottom of the bracket, a first electric push rod is fixed. At the output end of the first electric push rod, two second electric push rods are fixed. At the output ends of the two second electric push rods, a video connector and a power connector are respectively fixed.

[0022] Furthermore, the bracket includes a cross beam fixedly connected to the guide rail. One end of the cross beam is slidably clamped with a movable column, and a clamping plate for locking the position of the movable column is fixed at one end of the cross beam.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The display screen is adsorbed and fixed by multiple bellows suction cups on the transfer mechanism, and the display screen is transferred to a position above the detection mechanism. If the display screen is a flat display screen, the detection probes on multiple luminance meters point vertically upward towards the flat display screen. The multiple detection probes can detect the luminance of different regions in the length direction of the flat display screen. The lead screw two drives the U-shaped plate to drive the multiple detection probes to translate along the width direction of the flat display screen, facilitating the all-round detection of the luminance data of different positions of the flat display screen by the multiple detection probes.

[0025] If the display screen is a curved display screen, the two output ends of the double-headed lead screw contract, causing the rack to drive the gear to rotate. The gear drives the detection probe to rotate towards the outer side of the curved display screen, facilitating the alignment of the detection probe with different regions in the length direction of the curved display screen. The multiple detection probes can detect the luminance of different regions in the length direction of the curved display screen. Similarly, as the multiple detection probes translate along the width direction of the curved display screen, it is convenient for the multiple detection probes to all-round detect the luminance data of different positions of the curved display screen, thereby realizing that according to the type of the display screen's shape, the detection probe can be automatically adjusted to face the display screen, enabling the light of the display screen to correctly enter the optical measurement system of the luminance meter, ensuring the accuracy of the luminance detection result, and at the same time facilitating the expansion of the applicable range of the luminance detection device.

[0026] 2. The transfer mechanism drives the display screen to move horizontally above the multiple detection probes, so that different detection regions on the display screen can be transferred to positions above adjacent different detection probes, enabling the detection probes at different positions to sequentially detect the luminance of the same detection region. By comparing the luminance detection results of the same detection region above different detection probes, not only can the luminance data of the display screen be accurately obtained, but also it can indirectly determine whether the luminance meter and the detection probe are damaged. If the luminance detection results of the same detection region above different detection probes are the same or within the allowable error range, it indicates that the luminance meter and the detection probe are intact. If the luminance detection results of the same detection region above different detection probes are different or exceed the acceptable error range, it indicates that the luminance meter or the detection probe is damaged.

[0027] 3. By detecting the brightness of the same area on the display screen with detection probes at different positions successively, if only one set of data among multiple sets of detection data exceeds the acceptable error range, it can indirectly indicate that the luminance meter or the detection probe for detecting this larger error data is damaged, facilitating the user to promptly lock and replace the damaged luminance meter or detection probe during the process of detecting the display screen brightness, enabling all the luminance meters and detection probes on the brightness detection device to be in good condition, which is conducive to indirectly improving the accuracy of the detection results of the brightness detection device.

[0028] 4. The transfer mechanism drives the display screen to move horizontally (in the length direction of the display screen) above multiple detection probes, and in cooperation with the detection mechanism itself that can drive multiple detection probes to move along the width direction of the display screen, so that a display screen with a larger size can still detect the brightness of the display screen in all directions through horizontal movement and the longitudinal movement of the detection mechanism itself, facilitating the brightness detection device to detect display screens of different sizes. And the detection probe is driven by a double-headed cylinder to be able to rotate at different angles, facilitating the detection probe to directly face curved display screens with different curvatures for brightness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present invention and the display screen;

[0030] Figure 2 is a schematic structural diagram of the overall structure of the present invention;

[0031] Figure 3 is a schematic structural diagram of the transfer mechanism in the present invention;

[0032] Figure 4 is a schematic structural diagram of the power-on mechanism in the present invention;

[0033] Figure 5 is a schematic structural diagram of the top of the base in the present invention;

[0034] Figure 6 is a schematic structural diagram of the detection mechanism in the present invention;

[0035] Figure 7 is a schematic structural diagram of the top of the C-shaped plate in the present invention;

[0036] Figure 8 is a schematic structural diagram of the detection probe adjusting the detection orientation in the present invention;

[0037] Fig. 9 is a simplified diagram of the movement of the display screen above the detection probe in the present invention.

[0038] In the figure: 100, conveying mechanism; 110, first support; 120, belt; 130, second support; 140, pallet; 200, transfer mechanism; 210, guide rail; 220, first lead screw; 230, driving seat; 240, first cylinder; 250, bellows suction cup; 251, hollow column; 260, third support; 261, first motor; 300, power-on mechanism; 310, bracket; 311, cross beam; 312, movable column; 313, clamping plate; 320, first electric push rod; 330, second electric push rod; 331, video connector; 332, power supply connector; 400, detection mechanism; 410, base; 411, second lead screw; 412, second motor; 420, U-shaped plate; 421, partition; 422, backing plate; 430, luminance meter; 431, detection probe; 432, counterweight ball; 440, double-headed cylinder; 441, rack; 442, extension rod; 450, gear; 500, support mechanism; 510, support plate; 511, third motor; 520, moving plate; 530, third lead screw. Detailed implementation manner

[0039] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Example 1, please refer to Figure 1 - Fig. 9 In the embodiment of the present invention, a display screen luminance detection device includes two conveying mechanisms 100 both for conveying a display screen. The conveying mechanism 100 is used to convey the display screen. A transfer mechanism 200 is arranged between the tops of the two conveying mechanisms 100. The transfer mechanism 200 includes a guide rail 210. A driving seat 230 is slidably connected to the bottom of the guide rail 210. A plurality of first cylinders 240 are fixed to the bottom of the driving seat 230. A bellows suction cup 250 is fixed to the output end of the first cylinder 240. A power-on mechanism 300 for automatically connecting an external power cable and a video cable to the display screen is fixed to one side of the guide rail 210. A detection mechanism 400 is fixed between the two conveying mechanisms 100. The detection mechanism 400 includes a base 410. A U-shaped plate 420 is slidably connected to the inside of the base 410. A plurality of luminance meters 430 are equally spaced and fixed to one side of the U-shaped plate 420. The luminance meter 430 is connected to a detection probe 431 through a cable. Two double-headed cylinders 440 are fixed to the top surface of the base 410. Gears 450 are meshed and driven by the two output ends of the double-headed cylinder 440 respectively. The middle of the U-shaped plate 420 and the outside of the gear 450 are both fixedly connected to the detection probe 431 at the corresponding position.

[0041] Specifically, by designing multiple brightness meters 430 detection probes 431 that are relatively fixed in traditional positions to be able to rotate in different directions, when detecting the brightness of a straight display screen or a curved display screen, the detection probes 431 on the brightness meter 430 can all face different areas of display screens with different shapes, so that the brightness detection device is suitable for detecting the brightness of straight display screens or curved display screens at the same time, which is beneficial to expanding the scope of use of the present application. The display screen is moved above the multiple detection probes 431 through the transfer mechanism 200, so that the same detection area on the display screen can be successively detected by the detection probes 431 at different positions in cooperation with the brightness meter 430 for brightness detection, thereby improving the accuracy of the display screen brightness detection results and facilitating the judgment of whether the detection probes 431 and the brightness meter 430 at different positions are damaged. The damaged brightness meter 430 can be replaced in time to ensure that the multiple brightness meters 430 and detection probes 431 on the brightness detection device are in good condition, which is beneficial to indirectly improving the accuracy of the display screen brightness detection results.

[0042] like Figure 1 and Figure 2 As shown, in this embodiment, the conveying mechanism 100 of the prior art mainly includes two pillars 110, a conveying roller rotates between the two pillars 110, a belt 120 is transmission-connected between the two conveying rollers, and a pallet 140 is fixedly supported by pillars 130 below the belt 120, so that the display screen on the assembly line can be stably conveyed to a brightness detection station through the belt 120, and then the transfer mechanism 200 transfers the display screen to the detection mechanism 400 for brightness detection. After the detection, the display screen will be transferred by the transfer mechanism 200 to the belt 120 of another conveying mechanism 100 and conveyed out to the next station. The details of the conveying principle of the conveying mechanism 100 of the prior art will not be described in detail here.

[0043] like Figure 3 As shown, in this embodiment, the top of the accordion suction cup 250 is connected and fixed with a hollow column 251, the hollow column 251 is fixedly connected to the output end of the cylinder 240, and the hollow column 251 is connected and fixed to the external negative pressure pump. The accordion suction cup 250 is a prior art component, which can not only adsorb and fix curved objects, but also adsorb and fix straight objects. Here, the accordion suction cup 250 is used to achieve the adsorption and fixation of both curved display screens and straight display screens.

[0044] In this embodiment, when the accordion suction cup 250 is needed to fix the display screen, the output end of the cylinder 240 is extended to make the accordion suction cup 250 abut against the display screen, and then the external negative pressure pump is connected to the connecting pipe on the outside of the hollow column 251 through a hose. The negative pressure pump sucks the air inside the accordion suction cup 250, so that the accordion suction cup 250 under negative pressure can adsorb and fix the display screen.

[0045] like Figure 2 and Figure 3 As shown in Figure 3 , in this embodiment, a first lead screw 220 that is rotationally connected to the transmission seat 230 is rotatably disposed inside the guide rail 210. One end of the guide rail 210 is fixed with a first motor 261 for driving the first lead screw 220 to rotate. Two support columns three 260 are fixed at both ends of the guide rail 210.

[0046] In this embodiment, the first motor 261 drives the first lead screw 220 to rotate, causing the transmission seat 230 to move the plurality of first cylinders 240 above the left belt 120. Then, the output end of the first cylinder 240 moves downward to make the bellows suction cup 250 adsorb and fix the display screen. Next, the output end of the first cylinder 240 moves upward to separate the display screen from the belt 120. The first motor 261 then drives the first lead screw 220 to rotate in the reverse direction, causing the plurality of first cylinders 240 to move the adsorbed and fixed display screen above the detection mechanism 400. Subsequently, the output end of the first cylinder 240 moves downward again to arrange the display screen above the detection probe 431, facilitating the subsequent detection mechanism 400 to detect the brightness of the display screen. After the detection is completed, similarly, the transfer mechanism 200 transfers the display screen to another belt 120, and the bellows suction cup 250 releases the display screen, sending out the display screen after brightness detection.

[0047] As Figure 6 and Figure 7 As shown in Figure 7 , in this embodiment, second lead screws 411 are rotatably disposed at both ends of the base 410. Transmission blocks that are threadedly connected to the corresponding second lead screws 411 are fixed at both ends of the U-shaped plate 420. Second motors 412 for driving the second lead screws 411 to rotate are fixed at both ends of the base 410.

[0048] In this embodiment, when it is necessary to make the U-shaped plate 420 drive the plurality of detection probes 431 to translate along the width direction of the display screen, the second motor 412 drives the second lead screw 411 to rotate, and the transmission blocks threadedly connected to the second lead screw 411 slide along the base 410, so that the U-shaped plate 420 drives the plurality of detection probes 431 to longitudinally move at the bottom of the display screen, facilitating the detection probes 431 to detect the brightness of different detection areas on the display screen.

[0049] As Figure 7 As shown in Figure 7 , in this embodiment, racks 441 are fixed to both output ends of the double-headed cylinder 440. The racks 441 are engaged with corresponding gears 450 for transmission. The gears 450 are rotatably connected to the U-shaped plate 420. An extension rod 442 is also fixed between the two output ends of one of the double-headed cylinders 440 and the racks 441, so that the two gears 450 at positions farther from the double-headed cylinder 440 can also be driven to rotate by the double-headed cylinder 440.

[0050] In this embodiment, pads 422 are fixed to both ends of the inner bottom surface of the U-shaped plate 420. The pads 422 are slidably connected to the racks 441. When the output end of the double-headed cylinder 440 shortens, the multiple racks 441 can stably move centered along the pads 422, causing the multiple gears 450 to drive the detection probe 431 to rotate away from the double-headed cylinder 440, facilitating the adjustment of the detection probe 431 to a position directly facing the display screen.

[0051] As Figure 6 and Figure 7 shown, in this embodiment, a partition plate 421 fixed to the corresponding position of the detection probe 431 is fixed at the middle position inside the U-shaped plate 420, so that the detection probe 431 at the middle position of the detection mechanism 400 does not rotate itself when the other detection probes 431 adjust their detection orientations, and always faces the middle position of the display screen.

[0052] As Figure 1 , Figure 2 and Figure 4 shown, in this embodiment, the power-on mechanism 300 includes a bracket 310. An electric push rod 320 is fixed to the bottom of the bracket 310. Two electric push rods 330 are fixed to the output end of the electric push rod 320. A video connector 331 and a power connector 332 are respectively fixed to the output ends of the two electric push rods 330.

[0053] In this embodiment, when the display screen is transferred above the detection mechanism 400 to prepare for brightness detection, the output end of the electric push rod 320 extends to make the output ends of the two electric push rods 330 respectively fix the video connector 331 and the power connector 332 close to the video jack and the power jack of the display screen. Finally, the output ends of the two electric push rods 330 respectively drive the video connector 331 and the power connector 332 to be inserted into the video jack and the power jack inside, realizing automatic power-on and video connection for the display screen for brightness detection.

[0054] In this embodiment, a video cable and a power cable are respectively electrically connected below the video connector 331 and the power connector 332, facilitating connection with external video and power. One end of each of the video connector 331 and the power connector 332 is fixed with a screw rod, and the screw rod is screwed and inserted into the output end of the electric push rod 330. When it is necessary to horizontally move the display screen for detection for some longer individual display screens, or to indirectly determine whether the luminance meter 430 is damaged by moving the display screen, the video connector 331 and the power connector 332 can be disassembled from the power-on mechanism 300 in advance and manually inserted to avoid the relatively fixed position of the power-on mechanism 300 interfering with the movement of the video connector 331 and the power connector 332 along with the display screen.

[0055] In this embodiment, the bracket 310 includes a cross beam 311 fixedly connected to the guide rail 210. One end of the cross beam 311 is slidably clamped with a movable column 312, and a clamping plate 313 for locking the position of the movable column 312 is fixed at one end of the cross beam 311. Since there are differences in the height positions of the video jacks and power jacks of the arc-shaped display screen and the flat display screen, the insertion height of the subsequent video connector 331 and power connector 332 can be adjusted by adjusting the height position of the movable column 312 on the cross beam 311, facilitating the power supply mechanism 300 to be applicable to the wiring of different display screens. After the position of the movable column 312 is adjusted, the bolt on the outer side of the clamping plate 313 is tightened to squeeze and fix the movable column 312 at the end of the cross beam 311. Of course, in this application, the power supply mechanism 300 may not be used for wiring, and manual wiring can also be performed on one side of the detection station. The specific wiring method can be flexibly selected according to needs.

[0056] As Figure 7 shown, in this embodiment, a counterweight ball 432 is threaded on the cable between the luminance meter 430 and the detection probe 431, so that the cable below the detection probe 431 is always in a taut state, preventing the cable from becoming slack and entangled during the process of adjusting the orientation of the detection probe 431. Among them, the cable passes through the U-shaped plate 420 and is connected to the detection probe 431. The principle of the luminance meter 430 and the detection probe 431 for detecting luminance is prior art and will not be described in detail here.

[0057] As Fig. 9 shown, in this embodiment, when the flat display screen moves slightly horizontally, the detection area above the detection probe 431 at position A before is transferred above the detection probe 431 at position B, so that the same detection area is detected for luminance by two detection probes 431 successively. By comparing whether the luminance values of the two are the same, it is possible to indirectly determine whether the luminance meter 430 and the detection probe 431 are damaged.

[0058] Embodiment 2. On the basis of Embodiment 1, in order to enable two detection mechanisms 400 to be arranged between two conveying mechanisms 100 simultaneously to improve the overall efficiency of the display screen luminance detection.

[0059] As Figure 5 shown, in this embodiment, a support mechanism 500 is provided on the top of the base 410. The support mechanism 500 includes two support plates 510 both fixed on the top of the base 410. Two moving plates 520 are slidably connected to the tops of the two support plates 510. A third lead screw 530 is rotatably provided on the top of one support plate 510. The third lead screw 530 is in threaded connection with the two moving plates 520. One end of one support plate 510 is fixed with a third motor 511, and the output end of the third motor 511 is fixedly connected to the third lead screw 530.

[0060] Specifically, two detection mechanisms 400 are arranged between two conveying mechanisms 100, two support plates 510 are fixed on the base 410 of the detection mechanism 400, and the two support plates 510 are slidably connected with a movable plate 520, so that the distance between the two movable plates 520 can be adjusted to a suitable position, so that the display screen to be detected can be placed between the two movable plates 520. At this time, the transfer mechanism 200 can leave the display screen, so that the transfer mechanism 200 can adsorb and fix the second display screen during the display screen brightness detection and transfer the second display screen to another detection mechanism 400. After the second display screen is placed, the transfer mechanism 200 returns to the top of the first display screen to adsorb and fix it, and transfers the first display screen that has completed the detection away from the detection mechanism 400, thereby realizing that the transfer mechanism 200 continuously transfers the display screen for brightness detection, which is beneficial to improving the detection efficiency.

[0061] In this embodiment, when adjusting the positions of the two movable plates 520, the output end of motor three 511 drives screw three 530 (bidirectional screw) to rotate forward and reversely, so that the two movable plates 520 can move closer to each other or move away from each other along the support plate 510, thereby realizing that the two movable plates 520 can support display screens of different lengths.

[0062] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A display screen brightness detection device, characterized in that: Including: Conveying mechanisms (100), two in number, both for conveying display screens; Transfer mechanism (200), arranged on top of the two conveying mechanisms (100). The transfer mechanism (200) includes a guide rail (210). A driving seat (230) is screwed and driven at the bottom of the guide rail (210). A plurality of first cylinders (240) are fixed to the bottom of the driving seat (230). An accordion suction cup (250) is fixed to the output end of the first cylinder (240); Power-on mechanism (300), fixed on one side of the guide rail (210), for automatically connecting external power cables and video cables to the display screen; Detection mechanism (400), fixed between the two conveying mechanisms (100). The detection mechanism (400) includes a base (410). A U-shaped plate (420) is screwed and driven inside the base (410). A plurality of luminance meters (430) are equally spaced and fixed on one side of the U-shaped plate (420). The luminance meter (430) is connected to a detection probe (431) through a cable. Two double-headed cylinders (440) are fixed to the top surface of the base (410). Gears (450) are meshed and driven at the two output ends of the double-headed cylinder (440). The middle of the U-shaped plate (420) and the outside of the gear (450) are fixedly connected to the detection probe (431) at the corresponding position.

2. The display screen brightness detection device according to claim 1, characterized in that: A hollow column (251) is connected and fixed to the top of the accordion suction cup (250). The hollow column (251) is fixedly connected to the output end of the first cylinder (240), and the hollow column (251) is connected and fixed to an external negative pressure pump.

3. The display screen brightness detection device according to claim 1, characterized in that: A lead screw one (220) that is rotationally connected to the driving seat (230) is rotated inside the guide rail (210). A first motor (261) for driving the lead screw one (220) to rotate is fixed to one end of the guide rail (210). Two support columns three (260) are fixed to both ends of the guide rail (210).

4. The display screen brightness detection device according to claim 1, characterized in that: Lead screws two (411) are rotated at both ends of the base (410). Transmission blocks that are screwed and connected to the corresponding lead screws two (411) are fixed to both ends of the U-shaped plate (420). Second motors (412) for driving the lead screws two (411) to rotate are fixed to both ends of the base (410).

5. The display screen brightness detection device according to claim 1, characterized in that: Racks (441) are fixed to the two output ends of the double-headed cylinder (440). The racks (441) are meshed and driven with the gears (450) at the corresponding positions. The gears (450) are rotationally connected to the U-shaped plate (420).

6. The display screen brightness detection device according to claim 5, characterized in that: A partition plate (421) that is fixed to the detection probe (431) at the corresponding position is fixed at the middle position inside the U-shaped plate (420). Cushion plates (422) are fixed to both ends of the inner bottom surface of the U-shaped plate (420). The cushion plates (422) are slidably connected to the racks (441).

7. The display screen brightness detection device according to claim 1, characterized in that: A support mechanism (500) is arranged on the top of the base (410). The support mechanism (500) includes: Support plates (510), two in number, both fixed to the top of the base (410); Moving plates (520), two in number, both slidably connected between the two support plates (510); Lead screw three (530), a bidirectional lead screw, rotationally connected to the top of one support plate (510), and the lead screw three (530) is screwed and connected to the two moving plates (520).

8. The display screen brightness detection device according to claim 7, characterized in that: A motor three (511) is fixed to one end of a support plate (510), and an output end of the motor three (511) is fixedly connected to a screw rod three (530).

9. The display screen brightness detection device according to claim 1, characterized in that: The power supply mechanism (300) comprises a bracket (310), a first electric push rod (320) is fixed at the bottom of the bracket (310), two second electric push rods (330) are fixed at the output end of the first electric push rod (320), and a video connector (331) and a power connector (332) are respectively fixed at the output ends of the two second electric push rods (330).

10. The display screen brightness detection device according to claim 9, characterized in that: The bracket (310) comprises a crossbeam (311) fixedly connected to the guide rail (210), one end of the crossbeam (311) is slidably engaged with a movable column (312), and one end of the crossbeam (311) is fixed with a clamping plate (313) for locking the position of the movable column (312).

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