A polarizing sheet attachment precision detection device

Abstract

The utility model discloses a polarizing plate attaches precision detection equipment, including drive roller shaft, first fixed link, second fixed link, first sliding rail, first sliding block, wherein, drive roller shaft fixed setting, drive roller shaft rotation pushes polarizing plate forward, first fixed link is perpendicular to the polarizing plate movement direction setting, two cameras are respectively arranged below first fixed link, and each camera faces the polarizing plate movement direction front end an angle and shoots, and two second fixed links are arranged at the both ends of drive roller shaft respectively, and the polarizing plate movement direction is same, and first sliding rail is fixed and set up on second fixed link, and first sliding block is slidably arranged on first sliding rail, and also be provided with a camera below first sliding block, and its shooting direction is same with the camera below first fixed link, through the edge and then through the software and carries out image processing, realizes the ability of weak edge accurate detection, and the false catch rate is reduced obviously.

Description

Technical Field

[0001] The utility model relates to the field of polarizer detection, in particular to a polarizer attachment precision detection device. Background Art

[0002] The current polarizer attachment precision detection solution uses a 4K industrial camera as the core detection device, which has a detection accuracy of 50μm under its optical system design and a single field-of-view visible range of 12×12mm. This solution has significant technical bottlenecks in the attachment precision detection of large-size high-precision products such as 65-inch and larger display panels: on the one hand, when the attachment precision requirement of the product to be detected exceeds 6.6mm, limited by the 12×12mm visible range, the edge contours of the panel and the polarizer cannot be completely captured within the camera's field of view, which prevents the system from accurately calculating the relative offset between the two through image algorithms, thereby affecting the quantitative detection of the attachment precision; on the other hand, the existing algorithms have insufficient recognition capability for edge features, and cannot effectively distinguish the subtle edge differences between the polarizer and the panel. If the polarizer is over-attached, that is, exceeds the preset attachment boundary, the system is prone to misjudging it as a qualified state, causing defective products to flow into subsequent production links such as module assembly and backlight lamination, increasing rework costs and delivery risks. In addition, this solution has strict requirements on the edging quality of incoming panels, and can only identify clear and sharp edge contours. It cannot effectively detect weak edges caused by process fluctuations, such as edge chipping, micro-cracks or uneven edging, which causes the equipment to frequently trigger false alarms, forcing the production line to stop for troubleshooting, and seriously affecting the overall production efficiency and equipment availability. Contents of the Utility Model

[0003] To solve the above technical problems, the utility model provides the following technical solution: A polarizer attachment precision detection device, comprising a driving roller shaft, a first fixing rod, a second fixing rod, a first sliding rail, and a first sliding block, wherein the driving roller shaft is fixedly arranged, the driving roller shaft rotates to push the polarizer forward, the first fixing rod is arranged in a horizontal direction perpendicular to the moving direction of the polarizer, two cameras are respectively arranged below the first fixing rod, each camera photographs a corner of the polarizer closest to it, two second fixing rods are respectively arranged at both ends of the driving roller shaft in the same direction as the moving direction of the polarizer, two first sliding rails are respectively fixedly arranged on the corresponding second fixing rods, the first sliding block is slidably arranged on the first sliding rail, and a camera is also arranged below the first sliding block, whose shooting direction is the same as that of the cameras below the first fixing rod.

[0004] Further, the device further comprises a second sliding rail and a second sliding block, wherein two second sliding rails are fixedly arranged on the first fixing rod, one second sliding rail is fixedly arranged on each first sliding block, each second sliding rail is slidably connected with one second sliding block, and one camera is fixedly arranged on each second sliding block.

[0005] Furthermore, the drive roller shaft includes drive discs, wherein each drive roller shaft is provided with a plurality of drive discs, and the cross-sectional diameter of the drive discs is larger than that of the drive roller shaft.

[0006] Furthermore, the outer edge of the drive disc is wrapped with damping soft rubber.

[0007] Furthermore, the camera is a monochrome area array camera.

[0008] Furthermore, the monochrome area array camera is equipped with an independently controllable ring light source.

[0009] The beneficial effects of this utility model are:

[0010] This invention improves the maximum viewing angle to 24*20mm, enabling high-precision and accurate detection. After edge capture, image processing is performed by software to achieve accurate detection of weak edges, significantly reducing the false capture rate. After edge capture, the vertex is calculated and the contrast within its range is compared to achieve high-precision detection of ultra-edge attachment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a polarizer attachment accuracy testing device.

[0012] Among them, drive roller 100, drive disk 110,

[0013] First fixing rod 200

[0014] Second fixing rod 300

[0015] First slide rail 400, first slider 410

[0016] Second slide rail 500, second slider 510

[0017] Black and white area array camera 600. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Reference Figure 1A polarizer attachment accuracy testing device includes a drive roller shaft 100, a drive disk 110, a first fixed rod 200, a second fixed rod 300, a first slide rail 400, a first slider 410, a second slide rail 500, a second slider 420, and a black-and-white area array camera 600. Several drive roller shafts 100 are fixedly arranged, and each drive roller shaft 100 is equipped with several drive disks 110. The drive disks 110 are disc-shaped. The drive roller shafts 100 drive the drive disks 110 to rotate, and the drive disks 110 drive the polarizer to move forward. Two second fixed rods 300 move in the same direction as the polarizer and are fixedly arranged at both ends of the drive roller shaft 100. A first slide rail 400 is fixedly arranged on each of the second fixed rods 300 and 500. A first slider 410 is slidably connected to each first slide rail 400, which moves in the same direction as the polarizer. A track 500 is fixedly connected, and a first slider 410 drives the second slide rail 500 connected to it to slide on the first slide rail 400. A first fixed rod 200 is fixedly set perpendicular to the moving direction of the polarizer, and two second slide rails 500 are fixedly set on it. The two second slide rails 500 set on the first fixed rod 200 and the two second slide rails 500 set on the two first sliders 410 are perpendicular to the moving direction of the polarizer. Each second slide rail 500 is set with a second slider 510, which can slide on the second slide rail 500. A black and white area array camera 600 is fixedly connected below the second slider 510. The black and white area array camera 600 faces the polarizer to take pictures. The resolution of the black and white area array camera 600 can reach 2448*2048, the detection accuracy is 10um, the maximum viewing angle is 24*20mm, and an independently controllable ring light source is added.

[0020] Example 1: First, a polarizer is inserted from the input end of the drive roller 100. After the rotation of the drive disk 110 on several drive rollers 100, the polarizer is pushed forward. At this time, according to the different sizes of the polarizer, the second slider 510 on the first fixed rod 200 moves on the second slide rail 500. The two second sliders 510 move in opposite directions, moving the black and white area array camera 600 located below it from above the two corners at the front end of the polarizer's moving direction. At the same time, the first slider 410 located on the second fixed rod 300 slides on the first slide rail 400, causing the second slide rail 500 fixedly connected to it to extend... The polarizer moves forward or backward, and the two first sliders 410 move forward or backward synchronously, moving the two second slide rails 500 to the required position. Then, the second sliders 510 on the second slide rails 500 move the black and white area array camera 600 on them to the corner of the polarizer closest to them. At this time, the four black and white area array cameras 600 take pictures synchronously. After edge imaging, different image processing is performed to achieve accurate differentiation between the panel and the polarizer. Through the relative position relationship after edge capture, vertex calculation and contrast comparison are performed to achieve accurate detection of super-edge attachment and prompt polarizer problems through software.

Claims

1. A polarizer attachment accuracy testing device, characterized in that, It includes a drive roller (100), a first fixed rod (200), a second fixed rod (300), a first slide rail (400), and a first slider (410), wherein, The drive roller (100) is fixedly set, and the rotation of the drive roller (100) pushes the polarizer forward. The first fixing rod (200) is set in the horizontal direction perpendicular to the direction of movement of the polarizer. Two cameras are positioned below the first fixed rod (200), each camera capturing a corner of the polarizer closest to it. Two second fixing rods (300) are respectively set at both ends of the drive roller shaft (100) in the same direction as the movement of the polarizer. Two first slide rails (400) are respectively fixedly mounted on corresponding second fixed rods (300). The first slider (410) is slidably mounted on the first slide rail (400). A camera is also provided below the first slider (410), and its shooting direction is the same as that of the camera below the first fixed rod (200).

2. The polarizer attachment accuracy testing device according to claim 1, characterized in that, It also includes a second slide rail (500) and a second slider (510), wherein, Two second slide rails (500) are fixedly installed on the first fixed rod (200). A second slide rail (500) is fixedly installed on each first slider (410). Each second slide rail (500) has a second slider (510) slidably connected to it. A camera is fixedly mounted on each of the second sliders (510).

3. A polarizer attachment accuracy testing device according to claim 1 or 2, characterized in that, The drive roller (100) includes a drive disc (110), wherein Each drive roller (100) is provided with several drive discs (110). The cross-sectional diameter of the drive disc (110) is larger than that of the drive roller shaft (100).

4. The polarizer attachment accuracy testing device according to claim 3, characterized in that, The outer edge of the drive disc (110) is wrapped with damping soft rubber.

5. A polarizer attachment accuracy testing device according to claim 1 or 2, characterized in that, The camera is a monochrome area array camera (600).

6. The polarizer attachment accuracy testing device according to claim 5, characterized in that, The black-and-white area array camera (600) is equipped with an independently controllable ring light source.

Images