KR20070016197A - Clamp Type Polarizing Film Precision Inspection Machine - Google Patents

Abstract

The present invention relates to an inspection device for automatically inspecting a good or bad state of a polarizing film, and more particularly, to automatically pick up and transport one by one the polarizing film loaded in the loading box, according to the defect of the polarizing film step by step ( The present invention relates to a clamp type polarizing film precision automatic inspection machine that can sort according to good or bad condition after inspecting defects.

The configuration of the present invention for this purpose and the loader unit for picking up the polarizing film by a single unit and delivering to the carrier;

A carrier for continuously conveying the edges of the polarizing film transmitted from the loader by clamping and then extending the clamped edge to the unloader;

An image acquisition unit for acquiring images of the polarizing film transferred to the carrier with a plurality of cameras;

A control unit which performs image processing on the image acquired by the image acquisition unit by a computer or the like and transmits a control signal to the unloader unit;

An unloader unit for classifying and loading the polarizing film into a good or bad unit through a control signal of the controller; Characterized in that it comprises a.

This has the effect of significantly reducing the inspection time by automating the polarizing film inspection and screening work that was previously screened directly by the human eye.

In addition, by using a carrier of the clamp type, it is possible to minimize the influence of the vibration, friction, etc. from the outside during the transfer of the polarizing film, it is possible to obtain a clearer image because the polarizing film is moved at a constant speed in a completely unfolded state using the clamp, It can prevent the problem that the polarizing film can be damaged during the inspection process.

Polarizing Film, Clamps, Carriers, Defects, Screening, Cameras, Image Processing

Description

Clamp type polarizing film precision automatic inspection machine {A SHEET AUTO INSPECTION MACHINE USING CLAMPING CARRIER}

1 is a perspective view of the whole embodiment according to the present invention,

2 is a plan view of FIG. 1,

3 is a left side view of FIG. 1;

4 is a front view of FIG. 1,

5 is a front view of the loader of an embodiment of the present invention,

6 is a front view of an image acquisition unit according to an embodiment of the present invention;

Figure 7 is a front view of the unloader portion of one embodiment according to the present invention.

 Description of the main parts of the drawing

100: loader 110: loading box

120: pickup robot 130: vacuum plate

140: rotating stage 200: carrier

210: clamp 220: linear reciprocating device

300: image acquisition unit 310: camera group

320: lighting group 330: discharge plate

400: unloader 420: classification robot

The present invention relates to an inspection device for automatically inspecting a good or bad state of a polarizing film, and more particularly, to automatically pick up and transport one by one the polarizing film loaded in the loading box, according to the defect of the polarizing film step by step ( The present invention relates to a clamp type polarizing film precision automatic inspection machine that can sort according to good or bad condition after inspecting defects.

In general, a polarizing film is attached to visualize a change in alignment of liquid crystal in a liquid crystal display (LCD).

The polarizing film is a factor that greatly influences the display characteristics of the liquid crystal display device. When a defect is present on the outer surface or the inside of the polarizing film, the display characteristic of the liquid crystal display device is degraded.

Therefore, a process for checking whether a defect exists in the polarizing film is required. In the past, most workers individually used a method of visually inspecting the appearance of the polarizing film.

However, the above method has a problem in that the reliability of the inspection occurs depending on the skill of the operator and the size of the polarizing film, and if there is a defect in the polarization characteristics, it cannot be visually recognized and the inspection time is too long. .

Attempts have been made to automate the inspection of polarizing films using equipment, but due to the polarizer structure in the polarizing film, curling of the polarizing film occurs, making it difficult to obtain an accurate image. When using a belt conveyor, the surface of the polarizing film is often damaged.

The present invention was devised to solve the above problems, an object of the present invention can improve productivity by automatically performing a good and bad sorting operation while transferring the polarizing film loaded in the loading box one by one. To provide a clamp type polarizing film precision automatic inspection machine.

In addition, by using a clamp-type carrier, the polarizing film is completely opened to obtain an image of the polarizing film, so that a reliable inspection can be performed, and a clamp type polarization can minimize damage of the polarizing film that may occur during the inspection process. To provide a film precision automatic tester.

The configuration of the present invention for this purpose and the loader unit 100 to pick up the polarizing film by one unit and to deliver to the carrier; A carrier (200) for continuously transporting the four edges of the polarizing film transmitted from the loader by clamping; An image acquisition unit 300 for acquiring an image with a plurality of cameras of the polarizing film transferred to the carrier; A controller (not shown) which performs image processing on the image acquired by the image acquisition unit by a computer and transmits a control signal to the unloader; An unloader unit 400 for classifying and loading the polarizing film into good or bad according to the control signal of the control unit; Characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings the configuration and operation of the subject innovation look in detail.

The loader unit 100 is a portion for picking up the polarizing film loaded in the stacking unit and transferring it to the carrier 200, the stacking box 110; Pick-up robot 120; A vacuum plate 130; It is configured to include a rotating stage 140.

The stacking box 110 is arranged one by one on the left and right to pick up the polarizing film loaded on one side of the stacking box, so that the polarizing film can be loaded into the other stacking box.

In addition, each time the polarizing film is picked up one by one by the pickup robot, it is preferable to configure a lifter (lifter) to raise the inner bottom surface of the stacking box 110 by the thickness of the polarizing film.

The pickup robot 120 is an XYZ-3 axis robot, and constitutes an adsorption plate 122 capable of adsorbing a polarizing film on an end of an arm 121 reciprocating on the loading box 110 and the vacuum plate 130.

The puff plate 130 is configured between the left and right loading boxes 110, and absorbs the polarizing film transported and seated by the pickup robot 120 in a vacuum state to completely fix the polarizing film. And the vacuum plate 130 is a clamp 210 of the carrier 200 to be described later along the supply rail 131 through the rotation of the motor, etc. to align the polarizing film when entering the clamp 210 of the carrier 200 It moves to a position where the polarizing film can be gripped.

In order to correspond to the size change of the polarizing film, the vacuum plate 130 is preferably configured to be removable so that the vacuum plate of various sizes can be changed according to the size of the polarizing film.

The vacuum plate 130 and the adsorption plate 122 adsorb the polarizing film in a vacuum state using an air cylinder (not shown), and release the vacuum state to separate the polarizing film.

The rotating stage 140 is positioned below the vacuum plate 130 and rotates the vacuum plate 130 in a horizontal direction using a step motor at a minute angle. The polarizing film is accurately received by receiving a sensor signal or the like. Means to adjust the position. This allows the clamp 210 of the carrier 200 to be described later to accurately grip the four sides of the polarizing film.

The carrier 200 is a portion for continuously transporting the four edges of the polarizing film transmitted from the loader unit 100 by clamping, and a plurality of clamps 210 configured at the four side edges of the transmitted polarizing film. Wow; An air cylinder (not shown) for controlling the clamp pneumatically; It comprises a straight reciprocating device 220 for continuously conveying the clamp.

The clamp 210 is configured in the form of a forceps to grip the four sides of the polarizing film.

The air cylinder controls the gripping operation of the clamp 210 by providing pneumatic pressure to the clamp 210.

The linear reciprocating device 220 uses a known ball screw or a motion driver, etc. as a part for constant speed transfer of the clamp 210.

The image acquisition unit 300 is a part of acquiring an image with a plurality of cameras of the polarizing film conveyed by the carrier, the camera group 310 located in four parts; An illumination group 320 positioned at four portions; It comprises a discharge plate 330 on which the polarizing film conveyed by the carrier 200 is seated.

The camera group 310 is composed of a plurality of cameras for photographing the transported polarizing film, the transmission camera group 311 and; A cross camera group 312; A bottom reflection camera group 313; The upper reflection camera group 314 is configured.

The transmission camera group 311, the cross camera group 312, and the upper surface reflection camera group 314 are positioned above the polarizing film to be transferred, and the lower surface reflection camera group 313 is located below the polarizing film to be transferred.

Each camera group detects defects of different areas and types, and the transmission camera group 311 is disposed vertically downward to detect defects such as protective paper tearing, sticky material, stamping, scratching, and the like. 313 and 314 are arranged at an oblique angle with respect to the horizontal plane to detect defects such as bending and bubbles.

In particular, the cross camera group 312 attaches a polarizing filter to the camera lens and arranges it at an oblique angle with respect to a horizontal plane. By determining the polarization properties of the polarizing film is good to determine.

The illumination group 320 is a part for providing illumination to the camera group in order to obtain a clearer image, the transmission group 321; Cross lighting group 322; An upper reflection illumination group 323; The lower surface reflection illumination group 324 is configured.

The transmissive illumination group 321, the cross illumination group 322, and the bottom reflection illumination group 323 are positioned below the polarizing film being transferred, and only the upper reflection reflection group 324 is positioned above the polarizing film being transferred.

The discharge plate 330 is located at the end of the image acquisition unit 300, the polarizing film transported by the carrier 200 is seated.

When the polarizing film is seated, the discharge plate 330 transfers the polarizing film to the unloader unit 400 which will be described later through rotation of a motor along the discharge rail 331 configured at the bottom thereof.

The controller (not shown) is a part that performs image processing on the image acquired by the image acquisition unit 300 by a computer or the like, detects a defect, and transmits a control signal to the unloader.

The unloader unit 400 is a portion for stacking the polarizing film classified as good or bad through the control signal of the controller with respect to the polarizing film to be transferred, the loading box (510); It is configured to include a classification robot (520).

The stacking box 510 may be arranged in left and right sides, and when the discharge plate 330 is transported along the discharge rail 331 to a position between the stacking boxes 510, the classification robot that receives a control signal from the controller ( 520 is classified into different loading boxes 510 according to good and bad conditions.

The sorting robot 520 is an XYZ-3 axis robot, like the pickup robot 120, and uses a suction plate 522 configured at the end of the arm 521 moving on the loading box 510 and the discharge plate 330. The film may be transferred from the discharge plate 330 to the loading box 510.

This has the effect of significantly reducing the inspection time by automating the polarizing film inspection and screening work that was previously screened directly by the human eye.

In addition, by using a carrier of the clamp type, it is possible to minimize the influence from the outside such as vibration and friction when transferring the polarizing film, and to obtain a clearer image because the polarizing film is moved at a constant speed in a completely flat state using the clamp. In addition, the polarizing film may be damaged during the inspection process.

Claims (3)

In the inspection equipment that automatically checks the quantity and defective state of the polarizing film, Picking up the polarizing film in units of one piece to transfer to the carrier 200, the stacking box 110; Pick-up robot 120; A vacuum plate 130; A loader unit 100 including a rotating stage 140; A plurality of clamps 210 configured to continuously transfer the polarizing film transferred from the loader unit 100 to four side edge positions of the transmitted polarizing film; An air cylinder (not shown) for controlling the clamp 210 by pneumatic pressure; A carrier (200) comprising a straight reciprocating device (220) for continuously transporting the clamp (210); A camera group 310 positioned at four portions, the polarizing film transferred by the carrier 200 to acquire images with a plurality of cameras; An illumination group 320 positioned at four portions; An image acquisition unit 300 including an emission plate 330 on which the polarizing film transferred by the carrier 200 is seated; A controller which performs image processing on the image acquired by the image acquisition unit 300 by a computer or the like, detects a defect, and transmits a control signal to the unloader unit 400; A loading box (510) as a part for classifying and loading the polarizing film into a good or bad one through a control signal of the controller; An unloader unit 400 including a classification robot 520; Clamp-type polarizing film precision automatic inspection, characterized in that comprising a. The method of claim 1, The pick-up robot 120 and the sorting robot 520 are XYZ-3 axis robots, and adsorption plates 122 and 522 capable of adsorbing polarizing films at the ends of the reciprocating arms 121 and 521 are configured; The vacuum plate 130 is configured between the stacking box 110, so that the polarizing film transported and seated by the pick-up robot 120 is adsorbed in a vacuum state using an air cylinder to be completely fixed in a flat state. To; The rotating stage 140 is located below the vacuum plate 130, and receives a sensor signal, the clamp type polarizing film precision automatic inspection device, characterized in that the vacuum plate 130 can be rotated in a horizontal direction at a fine angle. . The method of claim 1, The camera group 310 positioned in the four parts is composed of a plurality of cameras for photographing the transferred polarizing film, the transmission camera group 311, the cross camera group 312, the top reflection camera group 314 is transferred It is located above the polarizing film, the lower surface reflection camera group 313 is located under the transporting polarizing film; The lighting group 320 positioned in the four parts is a part providing illumination to each camera group 310 positioned in the four parts, the transmission lighting group 321, the cross lighting group 322, the bottom reflection Illumination group 323 is located under the polarizing film to be transferred, the upper surface reflecting illumination group 324 is clamp type polarizing film precision automatic inspection, characterized in that located on the upper portion of the polarizing film to be transferred.

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