Liquid crystal screen detection device

Abstract

The utility model relates to the technical field of screen detection equipment, in particular to a liquid crystal screen detection device which comprises a support, a conveying mechanism and a light blocking mechanism are installed on the support, the light blocking mechanism comprises four stand columns, the four stand columns are fixedly connected to the four corners of the support, a glass plate is bonded between every two adjacent stand columns, a top plate is bonded between every two adjacent stand columns, and the top plate is connected with the conveying mechanism. A fixing frame is fixedly connected to the top plate, a second motor is installed on the fixing frame, the lead screw is rotationally connected with the top plate, a light blocking cover is slidably connected to the outer sides of the four stand columns and the glass plate, the light blocking cover is located on the top plate, the light blocking cover is in threaded connection with the lead screw, and the light blocking cover is slidably connected with the fixing frame. The detection mechanism is mounted between the two opposite glass plates, and the liftable light shielding cover is mounted on the glass shell of the detection equipment, so that light shielding during brightness and color detection of the display screen is realized, and influence on detection of the display screen due to light transmission of the glass cover is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to screen detection equipment technical field, specifically a liquid crystal screen detection device. BACKGROUND

[0002] Liquid crystal display screen detection generally adopts AOI automatic optical detector to detect, and the AOI automatic optical detector detects: adopts high resolution camera and deep learning algorithm, realizes micron level defect detection, and can identify scratch, bubble, Mura spot and other low contrast defects. For example, the inspection speed of the Fuzhi special equipment reaches 2.5 seconds / piece, is suitable for 3-15 inch liquid crystal screen, scans the screen through multi-view field color brightness meter, calculates the brightness uniformity, and ensures that the color coordinates and color temperature meet the standard.

[0003] However, when the liquid crystal display screen is detected by the visual detection equipment at present, the liquid crystal display screen is conveyed to the bottom of the visual detection equipment through the conveying device, and the display screen is detected after being powered on, and only the illumination lamp on the detection equipment is turned off for detection when the brightness and color of the liquid crystal display screen are detected, and no light shield is arranged on the glass shell of the detection equipment for auxiliary detection, so that light is easily transmitted during detection, affecting the detection of the display screen by the visual camera.

[0004] Therefore, it is necessary to design a detection equipment with higher detection precision. UTILITY MODEL CONTENTS

[0005] Therefore, the liquid crystal screen detection device is provided, the light shield can be lifted on the glass shell of the detection equipment, the light is shielded during the detection of the brightness and color of the display screen, and the detection of the display screen is avoided by the light transmission of the glass cover.

[0006] The technical scheme for solving the above technical problems is as follows:

[0007] A liquid crystal screen detection device, comprising a support, a conveying mechanism and a light shielding mechanism are installed on the support, the light shielding mechanism comprises four columns, four columns are fixedly connected at the four corners of the support, glass plates are bonded between adjacent two columns, a top plate is bonded between the four columns, a fixed frame is fixedly connected to the top plate, a second motor is installed on the fixed frame, a lead screw is fixedly connected to the output end of the second motor through a shaft coupling, the lead screw is rotatably connected to the top plate, a light shield is slidably connected to the outer side of the four columns and the glass plates, the light shield is located on the top plate, the light shield is threadedly connected between the lead screw and the fixed frame, the light shield is slidably connected between the fixed frame, and a detection mechanism is installed between the two opposite glass plates.

[0008] Optionally, in an embodiment of the utility model, the height of the light shield is equal to the height of the glass plate and the stand, and two through grooves are oppositely arranged on both sides of the light shield relative to the center of the light shield.

[0009] Optionally, in an embodiment of the utility model, the light shielding mechanism further comprises observation windows, and two observation windows are oppositely hinged at the side opening of the light shield.

[0010] Optionally, in an embodiment of the utility model, the conveying mechanism comprises side plates, two groups of side plates are oppositely arranged on the support, a plurality of rollers are rotatably connected to the two side plates of the same group, a conveying belt is arranged on the plurality of rollers of the four side plates, a driving shaft is rotatably connected to each of the four side plates, and the driving shaft is rollingly connected to the conveying belt.

[0011] Optionally, in an embodiment of the utility model, the conveying mechanism further comprises a first motor, and the first motor is arranged on each of the four side plates and fixedly connected to the driving shaft through a shaft coupling.

[0012] Optionally, in an embodiment of the utility model, the conveying mechanism further comprises a limiting plate, and the limiting plate is fixedly connected to each of the two opposite side plates.

[0013] Optionally, in an embodiment of the utility model, the detection mechanism comprises a mounting strip, and the mounting strip is fixedly connected between the two opposite glass plates, and a CCD camera is arranged on the mounting strip between the two conveying belts.

[0014] Optionally, in an embodiment of the utility model, a dust removal mechanism is arranged on each of the two side plates, the dust removal mechanism comprises an air pump, the air pump is arranged on the support, a mounting bracket is arranged on each of the two side plates of the same side, a suction pipe is arranged on the mounting bracket with a top opening, suction holes are equidistantly arranged on the suction pipe, a connecting pipe is connected to each of the air pump and the suction pipe, a nut is threadedly connected to the opposite end of each of the two connecting pipes, a connector is threadedly connected to the opposite end of each of the two nuts, and a receiving cylinder is welded between the two opposite connectors.

[0015] Optionally, in an embodiment of the utility model, the dust removal mechanism further comprises a filter element, and the filter element is arranged in the receiving cylinder.

[0016] Compared with the prior art, the liquid crystal screen detection device has the following characteristics:

[0017] The light shield can be lifted, a darkroom environment that is almost fully closed and has no environmental light interference can be quickly and automatically constructed according to detection requirements, the accuracy and reliability of precise detection of the brightness and color of the liquid crystal screen are improved, and the problem of environmental light interference is solved.

[0018] The first motor-driven conveying belt realizes the independent control of the sub-regions of the detection station, can accurately control the feeding of the screen, the accurate positioning and staying in the detection area, and the discharging, has high automation degree, and improves the detection efficiency; the dust removal mechanism can automatically remove the dust and sundries on the surface of the screen, reduces the misjudgment or detection interference caused by the dust and sundries, and improves the detection accuracy.

[0019] The light shielding mechanism, the detection mechanism, the conveying mechanism and the dust removal mechanism are highly integrated on the support. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the embodiment 1 of the present application;

[0022] Figure 2 It is a schematic diagram of the connection structure of the side plate, the roller and the conveying belt of the embodiment 1 of the present application;

[0023] Figure 3 It is a schematic diagram of the connection structure of the side plate and the mounting frame of the embodiment 1 of the present application;

[0024] Figure 4 It is a schematic diagram of the connection structure of the mounting strip and the CCD camera of the embodiment 1 of the present application;

[0025] Figure 5 It is a schematic diagram of the connection structure of the light shielding cover and the observation window of the embodiment 1 of the present application;

[0026] Figure 6 It is a schematic diagram of the connection structure of the air pump, the connecting pipe and the side plate of the embodiment 1 of the present application;

[0027] Figure 7 It is a schematic diagram of the connection structure of the mounting frame, the suction pipe and the suction hole of the embodiment 1 of the present application;

[0028] Figure 8 It is a schematic diagram of the connection structure of the storage cylinder and the filter element of the embodiment 1 of the present application.

[0029] Fig. 1: support 1, conveying mechanism 2, side plate 201, roller 202, conveying belt 203, limiting plate 204, drive shaft 205, first motor 206, ash removal mechanism 3, air pump 301, connecting pipe 302, storage cylinder 303, suction pipe 304, mounting frame 305, suction hole 306, nut 307, connector 308, filter element 309, light blocking mechanism 4, light blocking cover 401, observation window 402, fixing frame 403, lead screw 404, second motor 405, vertical column 406, glass plate 407, top plate 408, detection mechanism 5, mounting strip 501, CCD camera 502. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present application will be further described below with reference to the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.

[0031] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top" and "bottom" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0032] Embodiment 1

[0033] Since the existing detection equipment is easy to transmit light during detection, affecting the detection of the display screen by the vision camera, in order to ensure the accuracy of detection, the structure of the detection device is improved and designed, and the specific scheme is as follows:

[0034] As Figures 1-8As shown, a liquid crystal screen detection device, including a support 1, the support 1 is installed with conveying mechanism 2 and light shielding mechanism 4, the light shielding mechanism 4 includes four columns 406, four corners of the support 1 are fixedly connected with four columns 406, glass plates 407 are bonded between adjacent two columns 406, a top plate 408 is bonded between four columns 406, the top plate 408 is fixedly connected with a fixing frame 403, the fixing frame 403 is installed with a second motor 405, the output end of the second motor 405 is fixedly connected with a lead screw 404 through a shaft coupling, the lead screw 404 is rotatably connected with the top plate 408, the outside of four columns 406 and glass plates 407 is slidably connected with a light shield cover 401, the light shield cover 401 is located on the top plate 408, the light shield cover 401 is threadedly connected with the lead screw 404, the light shield cover 401 is slidably connected with the fixing frame 403, detection mechanism 5 is installed between opposite two glass plates 407.

[0035] The height of the light shield cover 401 is equal to the height of the glass plate 407 and the column 406, and two through grooves are oppositely formed on the two sides of the light shield cover 401 about the center of the light shield cover 401, thereby improving the light shielding effect.

[0036] The light shielding mechanism 4 further includes an observation window 402, two observation windows 402 are hingedly connected at the opening of the side surface of the light shield cover 401, thereby facilitating the observation of the detection condition of the display screen during other detection.

[0037] The conveying mechanism 2 includes side plates 201, two groups of side plates 201 are oppositely installed on the support 1, a plurality of rollers 202 are rotatably connected on opposite two side plates 201 of the same group, a conveying belt 203 is installed on the plurality of rollers 202 on four side plates 201, drive shafts 205 are rotatably connected on four side plates 201, the drive shafts 205 are rollingly connected with the conveying belt 203, the conveying mechanism 2 further includes first motors 206, the first motors 206 are installed on four side plates 201, the output end of the first motor 206 is fixedly connected with the drive shaft 205 through a shaft coupling, the display screen to be detected is placed on two conveying belts 203, the first motor 206 is started to realize the feeding of the display screen into the inside of the glass plate 407.

[0038] The conveying mechanism 2 further includes limiting plates 204, the limiting plates 204 are fixedly connected on two opposite side plates 201, the display screen is blocked by the limiting plates 204 after the detection, thereby avoiding falling.

[0039] The detection mechanism 5 includes installation strips 501, the installation strips 501 are fixedly connected between opposite two glass plates 407, CCD cameras 502 are installed on the installation strips 501 and located between two conveying belts 203, the CCD cameras 502 can detect when the display screen enters the inside of the glass plate 407 for detection.

[0040] Two side plates 201 are provided with a dust removal mechanism 3, the dust removal mechanism 3 comprises an air pump 301, the air pump 301 is installed on the support 1, the two side plates 201 on the same side are provided with a mounting frame 305, the open-top mounting frame 305 is provided with a suction pipe 304, the suction pipe 304 is provided with suction holes 306 at equal intervals, the suction pipe 304 and the air pump 301 are both connected with a connecting pipe 302, the opposite ends of the two connecting pipes 302 are both threadedly connected with a nut 307, the opposite ends of the two nuts 307 are both threadedly connected with a connector 308, the opposite two connectors 308 are welded with a receiving cylinder 303, the dust removal mechanism 3 further comprises a filter element 309, the inside of the receiving cylinder 303 is provided with the filter element 309, before the display screen enters the inside of the glass plate 407, the air pump 301 is started to realize that the sundries on the display screen are sucked by the suction pipe 304 and are received in the inside of the receiving cylinder 303, and the sundries are filtered by the filter element 309.

[0041] Working principle:

[0042] Firstly, when the display screen is detected, the first motor 206 is started, the conveying belt 203 is driven to rotate through the driving shaft 205 cooperating with the roller 202, the liquid crystal display screen is conveyed to the inside of the four glass plates 407 through the conveying belt 203, when the liquid crystal display screen reaches the bottom of the CCD camera 502, the first motor 206 stops rotating, the display screen is not moved, and the display screen is connected to the power supply to detect the display screen through the CCD camera 502.

[0043] Then, when the brightness and color of the liquid crystal display screen need to be detected, the second motor 405 is started to drive the lead screw 404 to rotate, since the lead screw 404 is threadedly connected with the light shield 401, and the light shield 401 is slidingly connected with the outer wall of the four glass plates 407, when the lead screw 404 rotates, the light shield 401 is lowered, at this time, the light shield 401 slides downwards along the outside of the glass plate 407, the light shield 401 can be black to improve the light shielding effect, after the light shield 401 covers the glass plate 407, the inside of the light shield 401 is not transparent, which is beneficial to detect the brightness and color of the display screen, after the detection is completed, the two first motors 206 are started to rotate the two conveying belts 203 on the right side to discharge the display screen after the detection, the limiting plate 204 blocks the display screen to avoid falling.

[0044] Finally, when the display screen is placed for detection, it can be placed at the bottom of the mounting frame 305, the air pump 301 is started to realize that the suction pipe 304 inhales, the sundries on the display screen are sucked into the inside of the connecting pipe 302 through the suction holes 306, and finally are received in the receiving cylinder 303, the filter element 309 can filter the sundries, when cleaning, the nuts 307 on the two connecting pipes 302 are rotated in the opposite direction to realize that the nuts 307 are separated from the connectors 308, and the receiving cylinder 303 can be taken down to clean the sundries.

[0045] The detection device of the present scheme is provided with a light shield 401 that can be lifted, and can quickly and automatically build a darkroom environment that is almost fully closed and free from environmental light interference according to detection requirements.

[0046] The accuracy and reliability of precise detection of the brightness and color of the liquid crystal screen are improved, and the problem of environmental light interference is solved.

[0047] The conveying belt 203 driven by the independent first motor 206 realizes independent control of the detection stations in different zones. The screen can be accurately controlled for feeding, accurate positioning and staying in the detection area, and discharging, with high automation and improved detection efficiency.

[0048] The dust removal mechanism 3 can be automatically started to remove dust and debris on the screen surface, reduce false positives or detection interference caused by dust and debris, and improve the accuracy of the detection results.

[0049] The light shielding mechanism, the detection mechanism, the conveying mechanism, and the dust removal mechanism are highly integrated on the bracket 1. The overall structure of the device is compact, and the equipment occupies a relatively small area.

[0050] Embodiment 2

[0051] In this embodiment, the structure of the detection device is basically the same as that of embodiment 1, and the difference is that linear bearings or slide rail guides cooperating with the uprights are additionally provided at the four corner portions or the middle portions of the long sides inside the light shield. The stability and accuracy of the lifting are improved, and the friction on the side of the glass plate is reduced.

[0052] Embodiment 3

[0053] In this embodiment, the structure of the detection device is basically the same as that of embodiment 1, and the difference is that the two ends of the receiving cylinder 303 are designed as interfaces with sealing rings, and are directly connected with the connecting pipe 302 through quick-release clamps. The nuts 307 and the connecting heads 308 are cancelled, and the entire receiving cylinder can be quickly removed for cleaning or replacing the filter element by only loosening the clamps or flanges, improving the operation convenience.

[0054] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary or possible to exhaust all the embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A liquid crystal panel inspection apparatus comprising a support, characterized by: The support is provided with a conveying mechanism and a light shielding mechanism, the light shielding mechanism comprises four columns, four columns are fixedly connected to the four corners of the support, glass plates are bonded between every two adjacent columns, a top plate is bonded between the four columns, a fixing frame is fixedly connected to the top plate, a second motor is mounted on the fixing frame, a lead screw is fixedly connected to the output end of the second motor through a shaft coupling, the lead screw is rotatably connected to the top plate, a light shielding cover is slidably connected to the outer side of the four columns and the glass plates, the light shielding cover is located on the top plate, the light shielding cover is threadedly connected to the lead screw, and the light shielding cover is slidably connected to the fixing frame.

2. The liquid crystal panel inspection apparatus according to claim 1, wherein: The height of the light shielding cover is equal to the height of the glass plates and the columns, and two through grooves are oppositely formed on the two sides of the light shielding cover with respect to the center of the light shielding cover.

3. The liquid crystal panel inspection apparatus according to claim 1, wherein: The light shielding mechanism further comprises observation windows, and two observation windows are hingedly connected to the side openings of the light shielding cover.

4. The liquid crystal panel inspection apparatus according to claim 1, wherein: The conveying mechanism comprises side plates, two groups of side plates are oppositely mounted on the support, a plurality of rollers are rotatably connected to each of the two side plates in the same group, a conveying belt is mounted on the plurality of rollers on the four side plates, and a drive shaft is rotatably connected to each of the four side plates and rollingly connected to the conveying belt.

5. The liquid crystal panel inspection apparatus according to claim 4, wherein: The conveying mechanism further comprises a first motor, and a first motor is mounted on each of the four side plates and fixedly connected to the drive shaft through a shaft coupling.

6. The liquid crystal panel inspection apparatus according to claim 4, wherein: The conveying mechanism further comprises a limiting plate, and a limiting plate is fixedly connected to each of the two opposite side plates.

7. The liquid crystal panel inspection apparatus according to claim 4, wherein: The detection mechanism comprises mounting strips, and mounting strips are fixedly connected between the two glass plates, and a CCD camera is mounted on the mounting strips between the two conveying belts.

8. The liquid crystal panel inspection apparatus according to claim 4, wherein: Two dust cleaning mechanisms are mounted on the two side plates, the dust cleaning mechanism comprises an air pump, the air pump is mounted on the support, mounting frames are mounted on the two side plates on the same side, suction pipes are mounted on the mounting frames with open tops, suction holes are equidistantly formed in the suction pipes, connecting pipes are connected to the air pump and the suction pipes, nuts are threadedly connected to the opposite ends of the two connecting pipes, connecting heads are threadedly connected to the opposite ends of the two nuts, and a receiving cylinder is welded between the two connecting heads.

9. The liquid crystal panel inspection apparatus according to claim 8, wherein: The dust cleaning mechanism further comprises a filter element, and the filter element is arranged in the receiving cylinder.

Images