Mini LED circuit board performance detection device and method

Abstract

The present application relates to the technical field of performance detection, and particularly relates to a Mini LED circuit board performance detection device and method; comprising a device frame and a bottom plate mounted thereon; the bottom plate is fixedly provided with a rectangular frame, the upper end of the rectangular frame is provided with a sealing gasket, and the bottom plate is provided with a detection mechanism and a light beam mechanism; the present application solves the misjudgment problem caused by photon crosstalk in the optical detection of the Mini LED circuit board, improves the detection accuracy, that is, through the cooperative matching of the light beam mechanism and the detection mechanism, the lateral stray light is absorbed by the light beam gasket close to the LED chip, the environmental interference is isolated in the sealed darkroom, so that the light signal crosstalk between adjacent LED chips is eliminated, and the system can realize accurate defect identification through simple brightness threshold comparison.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of performance detection, in particular to a Mini LED circuit board performance detection device and method. BACKGROUND

[0002] Mini LED circuit board refers to the core substrate carrying Mini LED chips and its driving circuit. Mini LED chips have advantages of high brightness, high contrast, high reliability and energy saving, and have been widely used in high-end direct display screens, televisions, monitors and vehicle display backlight and display modules. In the production and manufacturing process of Mini LED circuit board, strict performance detection must be carried out to ensure the quality of the final product. The performance detection mainly includes the following aspects: electrical performance detection, welding quality detection and optical property detection, etc. Among them, the optical property detection usually uses high-resolution CCD or CMOS industrial camera as image sensor to shoot the lit circuit board, and determines whether the optical parameters of each chip meet the standard by analyzing the captured image data.

[0003] However, there are the following problems in the optical property detection process of Mini LED circuit board: due to the extremely small chip spacing, the light emitted by a bright LED chip will enter the adjacent camera sensor pixel area through multiple complex paths such as LED chip side light emission and substrate surface reflection. The unqualified chip that should be judged as "dead light" will have its measurement value higher than the judgment threshold due to the crosstalk light signal from the adjacent qualified LED chip, so it will be misjudged as a qualified product by the system, causing bad point missed detection.

[0004] Therefore, the problem of detection misjudgment and bad point missed detection caused by photon crosstalk is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a Mini LED circuit board performance detection device and method to solve the above technical problems.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: the first aspect of the present application provides a Mini LED circuit board performance detection device, which comprises a device frame and a bottom plate mounted thereon; the bottom plate is fixedly provided with a rectangular frame, the upper end of the rectangular frame is provided with a sealing gasket, and the bottom plate is provided with a detection mechanism and a light beam mechanism.

[0007] The light beam mechanism comprises a driving part arranged at the upper end of the bottom plate and located at the front side of the rectangular frame, a pressing frame is arranged above the rectangular frame, the lower end of the pressing frame is fixedly provided with a light beam pad, and the lower end of the pressing frame is further provided with a suction part.

[0008] The detection mechanism comprises a support plate arranged on the bottom plate and located at the rear side of the rectangular frame, the lower end of the support plate is fixedly connected with the bottom plate through a pair of supports, an industrial camera located directly above the pressing frame is installed on the support plate, an elastic light shielding cylinder is arranged on the industrial camera, and a push-pull part is arranged on the support plate.

[0009] The driving part drives the pressing frame to move downward and fix the circuit board through the adsorption part, then moves and tightly seals the circuit board on the rectangular frame; the light shielding mat is synchronously tightly wrapped around each LED chip to absorb lateral stray light and photon crosstalk; the push-pull part drives the light shielding cylinder to be attached to the pressing frame again to form a closed darkroom to isolate environmental light interference; the circuit board is lit in a staggered interval mode to detect the LED chip, wherein the light emitted by a good light is normally lit and captured by the industrial camera to form a bright spot with high brightness and clear boundary, and a bad light cannot emit light and has very low brightness in the corresponding area in the image, so that the high-accuracy defect identification of the LED chip is realized through brightness threshold comparison.

[0010] As a preferred scheme, the driving part comprises a supporting plate arranged on the bottom plate, the lower end of the supporting plate is also fixedly connected with the bottom plate through a pair of supports, and a cross slide for driving the pressing frame to move up and down and left and right is fixedly installed on the upper end of the supporting plate, a fixed plate is fixedly installed on the vertical moving section of the cross slide, and the front end of the pressing frame is fixedly connected with the rear end of the fixed plate.

[0011] As a preferred scheme, the detection mechanism further comprises a support seat fixedly installed on the upper end of the supporting plate, the support seat has an L-shaped structure, and the industrial camera is fixedly installed at the front end of the vertical section of the support seat.

[0012] As a preferred scheme, the push-pull part comprises a gas cylinder fixedly installed on the upper end of the horizontal section of the support seat, a connecting plate is fixedly installed on the extension section of the gas cylinder which is slidingly penetrated through the support seat and the supporting plate, the connecting plate is fixedly connected with the frame, a pair of sliding rods are fixedly installed between the supporting plate and the bottom plate, and the sliding rods are slidingly penetrated through the connecting plate.

[0013] As a preferred scheme, the adsorption part comprises a circular hole, the lower end of the pressing frame is uniformly provided with a circular hole penetrating through the light shielding mat, the circular holes are communicated with each other through the gas passages, and a suction disc is installed in each circular hole.

[0014] As a preferred scheme, the lower end of the horizontal section of the support seat is fixedly provided with a sealing plate, the industrial camera is penetrated through the sealing plate, a sealing ring is arranged on the surface of the connecting plate in contact with the industrial camera, the upper end of the elastic light shielding cylinder is fixedly connected with the lower end of the connecting plate, and the lower end of the elastic light shielding cylinder is fixedly provided with a frame.

[0015] As a preferred scheme, the lower end of the bottom plate is provided with a through hole communicated with the inner cavity of the rectangular frame.

[0016] The second aspect of the embodiment of the present application provides a Mini LED circuit board performance detection method, which is completed by using a Mini LED circuit board performance detection device, and comprises the following steps: S1, moving a pressing frame by a driving part, and adsorbing and fixing a to-be-detected circuit board by a suction accessory.

[0017] S2, moving and pressing the circuit board in S1 to a rectangular frame, and tightly attaching a light beam pad to a chip.

[0018] S3, tightly attaching an elastic light shielding cylinder to the pressing frame to form a sealed darkroom.

[0019] S4, misaligning and lighting the chip, and capturing image data by an industrial camera to determine whether the circuit board is qualified.

[0020] S5, moving the circuit board after detection in S4 out of the discharge.

[0021] The above one or more technical solutions in the embodiment of the present application have at least one of the following technical effects: first, the present application solves the misjudgment problem caused by photon crosstalk in the optical detection of the Mini LED circuit board, and improves the detection accuracy, that is, through the cooperative matching of the light beam mechanism and the detection mechanism, the light beam pad is tightly attached to the LED chip to absorb the lateral stray light, and the closed darkroom is combined to isolate the environmental interference, so that the light signal crosstalk between adjacent LED chips is eliminated, and the system can realize accurate defect recognition through simple brightness threshold comparison.

[0022] Second, the present application realizes effective inhibition of photon crosstalk through the physical light shielding property of the light beam pad, that is, the light beam pad tightly wraps each LED chip under the action of the pressing frame, and the special material can efficiently absorb the stray light overflowing from the side of the LED chip, thereby significantly reducing the diffusion range of light, so that the signal contrast between good light and bad light is greatly improved without the need for complex algorithm compensation.

[0023] Third, the present application ensures the high stability of the detection environment through the closed darkroom structure, that is, the elastic light shielding cylinder is tightly attached to the pressing frame to form an optically sealed space through the driving of the push-pull part, which completely isolates the interference of environmental light and internal stray light of the equipment, provides an ideal imaging environment for the industrial camera, and further ensures the reliability and consistency of the detection result.

[0024] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a schematic diagram of the push-pull part of the present invention.

[0028] Figure 3 This is an exploded view of part of the structure of the present invention.

[0029] Figure 4 This is a schematic diagram of the adsorption section of the present invention.

[0030] Figure 5 This is a partial structural cross-sectional view of the detection mechanism of the present invention.

[0031] Figure 6 This is a cross-sectional view of the airway structure of the present invention.

[0032] Reference numerals: 10, Equipment frame; 11, Base plate; 12, Rectangular frame; 13, Sealing gasket; 2, Beam sizing mechanism; 20, Pressure frame; 200, Air duct; 21, Beam sizing pad; 4, Drive unit; 40, Support plate; 41, Cross slide; 42, Fixing plate; 50, Suction cup; 3, Detection mechanism; 30, Support plate; 31, Industrial camera; 32, Elastic light shield; 33, Support base; 34, Sealing plate; 35, Frame; 6, Push-pull unit; 60, Cylinder; 61, Connecting plate; 62, Slide rod. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] like Figure 1 and Figure 3 As shown, a Mini LED circuit board performance testing device includes a device frame 10 and a base plate 11 mounted thereon; a rectangular frame 12 is fixedly mounted on the base plate 11, a sealing gasket 13 is provided at the upper end of the rectangular frame 12, and a testing mechanism 3 and a beam beam mechanism 2 are provided on the base plate 11.

[0035] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the light beam mechanism 2 includes a drive part 4 arranged on the upper end of the base plate 11 and located in front of the rectangular frame 12, and a pressing frame 20 is installed on the drive part 4 and located directly above the rectangular frame 12, and a light beam pad 21 is fixed to the lower end of the pressing frame 20, and a suction part is arranged at the lower end of the pressing frame 20.

[0036] As Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, the detection mechanism 3 includes a support plate 30 arranged on the base plate 11 and located behind the rectangular frame 12, and the lower end of the support plate 30 is fixedly connected to the base plate 11 through a pair of supports, and an industrial camera 31 is installed on the support plate 30 and located directly above the pressing frame 20, and an elastic light-shielding cylinder 32 is arranged on the industrial camera 31, and a push-pull part 6 is arranged on the support plate 30.

[0037] As Figure 1 and Figure 2 shown, the drive part 4 includes a supporting plate 40 arranged on the base plate 11, and the lower end of the supporting plate 40 is also fixedly connected to the base plate 11 through a pair of supports, and a cross slide 41 for driving the pressing frame 20 to move up and down and left and right is fixedly installed on the upper end of the supporting plate 40, and a fixed plate 42 is fixedly installed on the vertical moving section of the cross slide 41, and the front end of the pressing frame 20 is fixedly connected to the rear end of the fixed plate 42.

[0038] As Figure 4 and Figure 5 shown, the suction part includes a circular hole, and the lower end of the pressing frame 20 is uniformly provided with a circular hole penetrating through the light beam pad 21, and the circular holes are in communication with each other through the gas channel 200 arranged therebetween, and a suction disc 50 is installed in each of the circular holes and in communication therewith.

[0039] As Figures 1 to 6As shown, in particular work, the left side of the device frame 10 conveying belt will be detected to the left side of the device frame 10 circuit board, cross slide 41 drive initial state located above the rectangular frame 12 fixed plate 42 movement, fixed plate 42 drive pressure frame 20 to the left, until the pressure frame 20 moves to the top of the line board, then cross slide 41 through the fixed plate 42 drive pressure frame 20 down, so that the light pad 21 and line board, while the suction cup 50 and line board, then the external vacuum line and airway 200 communication, and airway 200 and round hole control suction cup 50 suction, suction cup 50 will line board adsorbed in the pressure frame 20, then cross slide 41 drive pressure frame 20 and the line board adsorbed on the move, until the line board lower end higher than the upper end of the sealing pad 13, then cross slide 41 drive pressure frame 20 and the line board fixed to the right, until the line board moves to the top of the rectangular frame 12, then cross slide 41 drive pressure frame 20 and the line board fixed to the down, so that the line board and sealing pad 13 fixed tightly, and light pad 21 tightly wrapped LED chip, to absorb the LED chip light up when most of the lateral stray light, so as to significantly inhibit the spread of light; In this physical shading effect light pad 21 form dark background contrast, good light because it can be normally lit so that the light emitted by industrial camera 31 captured image and will form a bright and clear boundary height concentrated light spot, while the bad light, because it can not emit light, its corresponding area in the image brightness is low, almost dark; This after the light pad 21 shaped optical environment makes the good light and bad light signal difference becomes extremely bright, signal to noise ratio is greatly improved, eventually make the detection system can only through the simple brightness threshold comparison can realize high accuracy of defect recognition, solve the traditional optical detection due to photon crosstalk caused by misjudgment problem.

[0040] Then push and pull part 6 drive initial state higher than the pressure frame 20 elastic light blocking cylinder 32 lower end down, so that the lower end of the elastic light blocking cylinder 32 and pressure frame 20 tightly, at this time through the elastic light blocking cylinder 32 on the detection range to form a dark area, in order to reduce the influence of external noise, so as to ensure the accuracy of detection, then the circuit board power and staggered light up LED chip.

[0041] At this time, the Mini LED circuit board covered with the beam light pad 21 and driven in a specific interval and on-off mode is imaged in a darkroom environment by the industrial camera 31, and the captured raw spot image data is transmitted in real time to the image processing system in the host computer through the data interface; the system first pre-processes the image to eliminate noise and background interference, and then identifies and frames the area where each theoretical lamp bead position is located through a precise positioning algorithm, and extracts the pixel gray value in the area; then, the measurement value is compared with the brightness threshold parameter preset in the software system, if the brightness measurement value of a certain position is continuously lower than the dead lamp judgment threshold value obtained by the statistical distribution of a large number of good lamp beads, the image processing system finally determines that the lamp bead is a dead lamp, and records the coordinate position and brightness abnormal data of the lamp bead to the defect list, thereby completing the automatic detection process.

[0042] After the detection is completed, the cross slide 41 drives the pressing frame 20 and the fixed circuit board to first move upward to separate from the rectangular frame 12, and then move to the right to separate from the bottom plate 11 and the equipment rack 10, so that the circuit board is completely moved to the external conveying belt located on the right side of the equipment rack 10. Then the cross slide 41 drives the pressing frame 20 and the circuit board to move downward to the external conveying belt, and then releases the adsorption of the circuit board. The cross slide 41 drives the pressing frame 20 to move back to the original position, and the external conveying belt on the right side drives the detected circuit board to move. If the detected circuit board is qualified, the next step is performed. If the detected circuit board is unqualified, it is conveyed to the repair table or the scrap area for processing.

[0043] In addition, in the specific implementation process, the beam light pad 21 is a matte black material. Through the rough and irregular microstructure on the surface, when light shines on this surface, it will cause diffuse reflection, which can minimize the influence of ambient light and stray light, thereby maximizing the background brightness of the image. In order to suppress photon crosstalk, a detection mode of partitioned on-off is required. In this mode, the physical interval between adjacent batches of chip groups is a key parameter, together with the extremely low reflectivity of the beam light pad 21. The specific values of these parameters are determined by optimizing the size, brightness and optical properties of the Mini LED chip through a limited number of conventional tests without creative labor. Secondly, during the entire working process, the pressing frame 20 and the circuit board adsorbed by it are always within the effective range of the external ion fan. The ion fan continuously generates and blows positive and negative ion flows. These ion flows can completely cover all spatial positions of the pressing frame 20 during movement and static process, so that the static charge that may be generated by friction or separation of the pressing frame 20 and the circuit board during movement, adsorption, detection and discharging process can be neutralized by the ion flow in real time, thereby maximizing the elimination of static charge accumulation and discharge risk, effectively preventing static discharge from micro LED chips, and ensuring the reliability and safety of the detection process.

[0044] As Figure 1 andFigure 2 As shown in the drawings, the detection mechanism 3 further comprises a support seat 33 fixedly installed at the upper end of the supporting plate 40, the support seat 33 is in L-shaped structure, and the industrial camera 31 is fixedly installed at the front end of the vertical segment of the support seat 33.

[0045] As shown in the drawings, Figure 1 , Figure 2 , Figure 4 and Figure 5 , the lower end of the horizontal segment of the support seat 33 is fixedly installed with a sealing plate 34, the industrial camera 31 penetrates through the sealing plate 34, the surface of the connecting plate 61 in contact with the industrial camera 31 is provided with a sealing ring, the upper end of the elastic light shielding cylinder 32 is fixedly connected with the lower end of the connecting plate 61, and the lower end of the elastic light shielding cylinder 32 is fixedly installed with a frame 35.

[0046] As shown in the drawings, Figure 2 and Figure 4 , the push-pull part 6 comprises a pneumatic cylinder 60 fixedly installed at the upper end of the horizontal segment of the support seat 33, the pneumatic cylinder 60 is fixedly installed with a connecting plate 61 at the rear end of the telescopic segment which penetrates through the support seat 33 and the supporting plate 40, the connecting plate 61 is fixedly connected with the frame 35, a pair of slide rods 62 are fixedly installed between the supporting plate 40 and the bottom plate 11, and the slide rods 62 penetrate through the connecting plate 61.

[0047] As shown in the drawings, Figure 3 and Figure 5 , the bottom plate 11 is provided with a through hole which is in communication with the inner cavity of the rectangular frame 12.

[0048] As shown in the drawings, Figures 1 to 5 , in specific work, the pressing frame 20 is in close contact with the sealing gasket 13 after adsorbing the circuit board, then the external vacuum pipeline is in communication with the through hole to extract the gas in the rectangular frame 12, so as to ensure the close contact between the circuit board and the sealing gasket 13, and the light shielding gasket 21 can also be adsorbed through the tiny holes on the circuit board to improve the adhesion between the light shielding gasket 21 and the LED chip and reduce light penetration, then the pneumatic cylinder 60 pushes the connecting plate 61 to move downward, the connecting plate 61 is in close contact with the upper end of the pressing frame 20 by stretching the elastic light shielding cylinder 32 through the frame 35, so as to construct a closed darkroom environment around the optical path between the lens of the industrial camera 31 and the light shielding gasket 21, which can effectively isolate the external environmental light and block the reflection of the internal stray light of the equipment, thereby significantly reducing the background noise during image acquisition; the industrial camera 31 can work in the optical dark field condition to improve the image signal-to-noise ratio and the accuracy of the detection result, then the LED chip is lit in staggered intervals, and the image data is captured by the industrial camera 31 to determine whether the circuit board is qualified.

[0049] After detection is completed, the cylinder 60 pulls the connecting plate 61 to move upwards, the connecting plate 61 drives the frame 35 to move upwards and reset, and the elastic light shielding cylinder 32 restores the deformation, and the cross slide 41 moves the detected circuit board out of the blanking, and then the material detection is carried out, so that the continuous and uninterrupted performance detection and processing of the circuit board are realized.

[0050] In addition, the application also provides a Mini LED circuit board performance detection method, which is completed by cooperating with the Mini LED circuit board performance detection equipment, and includes the following steps: S1, the cross slide 41 in the driving part 4 first drives the pressing frame 20 to move horizontally above the circuit board to be detected, then accurately moves downwards to make the light beam pad 21 at the lower end of the pressing frame 20 and the suction cup 50 in the suction part contact the surface of the circuit board, and the external vacuum pipeline starts to vacuum to firmly adsorb the circuit board on the pressing frame 20 through the suction cup 50 to complete the grabbing and fixing.

[0051] S2, the driving part 4 drives the pressing frame 20 to carry the circuit board to move upwards and horizontally to the upper side of the rectangular frame 12, then presses again to make the edge of the circuit board tightly contact the sealing pad 13 at the upper end of the rectangular frame 12 to form a seal, and the light beam pad 21 at the lower end of the pressing frame 20 tightly contacts the surface and physically wraps each LED chip in the process of pressing the circuit board to absorb the lateral stray light and suppress the photon crosstalk.

[0052] S3, the cylinder 60 in the push-pull part 6 drives the connecting plate 61 and the frame 35 to move downwards, and the frame 35 stretches the elastic light shielding cylinder 32 downwards until the lower end thereof tightly contacts the upper surface of the pressing frame 20, so that a closed darkroom environment is constructed between the lens of the industrial camera 31 and the circuit board to isolate all environmental light and internal reflected light interference.

[0053] S4, the circuit board is powered and the LED chips are lit in a preset misalignment interval mode, the industrial camera 31 collects the high-contrast light spot image shaped by the light beam pad 21 in the closed darkroom, the image data is transmitted to the processing system, and the algorithm directly compares the light spot brightness with the preset threshold value to quickly and accurately determine the dead lamp and other defects and generate the result.

[0054] S5, after detection is completed, the push-pull part 6 drives the elastic light shielding cylinder 32 to move upwards and reset, the driving part 4 drives the pressing frame 20 to carry the circuit board to move upwards and away from the rectangular frame 12, and then moves horizontally above the external conveying belt, at this time, the vacuum adsorption is released to release the circuit board to the conveying belt, and finally the driving part 4 drives the pressing frame 20 to return to the initial position to complete the whole cycle.

[0055] In the description of the present application, it is to be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0056] In addition, the terms "first", "second", "one", "two" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0057] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] The embodiments of the specific embodiment are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A Mini LED circuit board performance detection device, comprising a device frame and a bottom plate mounted thereon; characterized in that: The bottom plate is fixedly installed with a rectangular frame, the upper end of the rectangular frame is provided with a sealing gasket, and the bottom plate is provided with a detection mechanism and a light beam mechanism; The light beam mechanism comprises a driving part arranged on the upper end of the bottom plate and located at the front side of the rectangular frame, a pressing frame is installed on the driving part and located directly above the rectangular frame, a light beam gasket is fixed to the lower end of the pressing frame, and a suction part is arranged at the lower end of the pressing frame; The detection mechanism comprises a support plate arranged on the bottom plate and located at the rear side of the rectangular frame, the lower end of the support plate is fixedly connected with the bottom plate through a pair of supports, an industrial camera is installed on the support plate and located directly above the pressing frame, an elastic light shielding cylinder is arranged on the industrial camera, and a push-pull part is arranged on the support plate; The driving part drives the pressing frame to move downward and fix the circuit board through the suction part, then moves and presses the circuit board to the rectangular frame, and the light beam gasket tightly wraps each LED chip to absorb lateral stray light and photon crosstalk; the push-pull part drives the light shielding cylinder to be attached to the pressing frame to form a sealed darkroom to isolate environmental light interference; the circuit board is lit in a staggered interval mode to detect the LED chip, wherein the light emitted by the normal light of the good light is captured and imaged by the industrial camera to form a light spot with high brightness and clear boundary, and the bad light cannot emit light and the corresponding area in the image has very low brightness, so that the high-accuracy defect identification of the LED chip is realized through the brightness threshold comparison; The driving part comprises a supporting plate arranged on the bottom plate, the lower end of the supporting plate is also fixedly connected with the bottom plate through a pair of supports, and a cross slide for driving the pressing frame to move up and down and left and right is fixedly installed on the upper end of the supporting plate, a fixed plate is fixedly installed on the vertical moving section of the cross slide, and the front end of the pressing frame is fixedly connected with the rear end of the fixed plate; The suction part comprises a circular hole, the lower end of the pressing frame is uniformly provided with a circular hole penetrating through the light beam gasket, the circular holes are communicated with each other through the gas channels arranged therebetween, and a suction disc is installed in each circular hole and communicated with the circular hole.

2. The Mini LED circuit board performance detection device according to claim 1, characterized in that: The detection mechanism further comprises a support seat fixedly installed on the upper end of the supporting plate, the support seat has an L-shaped structure, and the industrial camera is fixedly installed on the front end of the vertical section of the support seat.

3. The Mini LED circuit board performance detection device according to claim 2, characterized in that: The push-pull part comprises a gas cylinder fixedly installed on the upper end of the horizontal section of the support seat, a connecting plate is fixedly installed at the rear end of the extension section of the gas cylinder and slidingly penetrates through the support seat and the supporting plate, the connecting plate is fixedly connected with the frame, a pair of sliding rods are fixedly installed between the supporting plate and the bottom plate and slidingly penetrate through the connecting plate.

4. The Mini LED circuit board performance detection device according to claim 3, characterized in that: The lower end of the horizontal section of the support seat is fixedly installed with a sealing plate, the industrial camera penetrates through the sealing plate, the surface of the connecting plate in contact with the industrial camera is provided with a sealing ring, the upper end of the elastic light shielding cylinder is fixedly connected with the lower end of the connecting plate, and the lower end of the elastic light shielding cylinder is fixedly installed with a frame.

5. The Mini LED circuit board performance detection device according to claim 1, characterized in that: A through hole is arranged in the bottom plate and communicated with the inner cavity of the rectangular frame.

6. A Mini LED circuit board performance detection method, characterized in that: The Mini LED circuit board performance detection equipment is used to complete the following steps: S1, the driving part moves the pressing frame, and the suction part adsorbs and fixes the circuit board to be detected; S2, the circuit board in S1 is moved and pressed to the rectangular frame, and the light beam gasket is tightly attached to the chip; S3, the elastic light shielding cylinder is attached to the pressing frame to form a sealed darkroom; S4, the chip is lit in a staggered mode, and the industrial camera captures image data to determine whether the circuit board is qualified; S5, the circuit board after detection in S4 is moved out.

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