LCD protective film surface interference detection device

Abstract

The utility model provides an LCD (liquid crystal display) protective film surface interference detection device, which belongs to the field of LCD product detection and comprises a support, a fixing frame is mounted on the support, and detection equipment and a low-angle light source are mounted on the fixing frame; the rotating station assemblies can be alternately used; the rotary station assembly comprises a mounting plate fixed to the support, a station plate is rotatably mounted at the upper end of the mounting plate, a square and stepped station groove is formed in the station plate in a penetrating mode, the interior of the station groove is used for containing the LCD protective film, the station plate rotates to enable the LCD protective film located in the station groove to be alternately located below the detection equipment, and the LCD protective film is located below the detection equipment. And the detected equipment is matched with the low-angle light source for detection. According to the utility model, through double-station alternate design, detection and loading and unloading are synchronously carried out, and the detection efficiency is obviously improved; the magnetic suction type quick-change station plate is adaptive to protective films with different sizes, and is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of LCD product testing technology, and in particular to an LCD protective film surface interference detection device. Background Technology

[0002] In the manufacturing process of LCDs, in order to prevent the polarizer from being scratched or contaminated, a protective film needs to be covered on the polarizer of the LCD substrate for surface protection, thereby reducing defective products in LCD products. However, in practical applications, the image feature information obtained by the camera is quite similar to that of the stains on the protective film and the stains inside the LCD. It is difficult to distinguish between the two by visual algorithms, which can easily lead to missed detections or false detections.

[0003] The prior art, disclosed in CN119290912A, discloses an LCD protective film surface interference detection device, which solves the above-mentioned technical problems. However, it still has shortcomings. For example, the detection platform can use a fixture to clamp and fix the LCD protective film. After the detection is completed, the test product on the fixture needs to be removed and then the product to be tested is placed for testing, which reduces the efficiency of product testing. Therefore, this application proposes an LCD protective film surface interference detection device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an LCD protective film surface interference detection device.

[0005] An embodiment of this utility model provides an LCD protective film surface interference detection device, comprising:

[0006] A bracket, on which a fixing frame is mounted, and on which a detection device and a low-angle light source are mounted;

[0007] A rotating station assembly capable of alternating use; the rotating station assembly includes a mounting plate fixed on a bracket, a station plate rotatably mounted on the upper end of the mounting plate, a square and stepped station slot penetrating the station plate, the station slot being used to place an LCD protective film, the station plate rotating so that the LCD protective film located in the station slot is alternately positioned below the testing equipment, the tested equipment cooperating with a low-angle light source for testing.

[0008] Furthermore, the bracket includes a rectangular frame and four supporting legs, which are welded and fixed to the bottom of the rectangular frame.

[0009] Furthermore, a mounting bracket is installed on the fixed frame, and the low-angle light source is mounted on the mounting bracket.

[0010] Furthermore, a motor is installed at the bottom of the mounting plate, and a drive shaft is fixed at the output end of the motor. A detachable connecting sleeve is fitted on the drive shaft, and the connecting sleeve is fixed to the bottom of the workstation plate.

[0011] Furthermore, the drive shaft is provided with a locking groove, a first permanent magnet is fixed in the locking groove, a sliding locking pin is provided through the connecting sleeve, a second permanent magnet is fixed at the end of the locking pin, the locking pin and the second permanent magnet slide in the locking groove, and the first permanent magnet and the second permanent magnet abut against each other.

[0012] Furthermore, the magnetic poles of the surfaces where the first permanent magnet and the second permanent magnet meet are opposite.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model achieves simultaneous detection and loading / unloading through a dual-station alternating design, significantly improving detection efficiency; the magnetic quick-change station plate is compatible with protective films of different sizes, making replacement convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an LCD protective film surface interference detection device described in an embodiment of this utility model.

[0016] Figure 2 This is a side view of an LCD protective film surface interference detection device described in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the connecting sleeve in an LCD protective film surface interference detection device described in this embodiment of the present invention.

[0018] In the above attached figures: 1 bracket, 2 mounting plate, 3 fixed bracket, 4 mounting bracket, 5 low-angle light source, 6 workstation plate, 7 motor, 8 workstation slot, 9 pick-up slot, 10 locking pin, 11 testing equipment, 12 connecting sleeve, 13 drive shaft, 14 locking slot, 15 second permanent magnet, 16 second permanent magnet. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-3 As shown in the figure, this utility model embodiment proposes an LCD protective film surface interference detection device, comprising:

[0021] The bracket 1 includes a rectangular frame and four supporting legs, which are welded and fixed to the bottom of the rectangular frame. A fixing frame 3 is mounted on the bracket 1, and a detection device 11 and a low-angle light source 5 are mounted on the fixing frame 3. A mounting bracket 4 is mounted on the fixing frame 3, and the low-angle light source 5 is mounted on the mounting bracket 4.

[0022] The testing device 11 includes a testing bracket, which is further explained as follows: The testing bracket is equipped with a camera and a rotation drive mechanism. The camera lens is positioned above the LCD protective film. The rotation drive mechanism includes a vertically arranged drive shaft. A polarizing mirror bracket is fixed to the lower end of the drive shaft and is perpendicular to the drive shaft. A polarizing mirror is fixed on the polarizing mirror bracket. A low-angle light source is used to obliquely illuminate the LCD protective film. The rotation drive mechanism is used to drive the polarizing mirror bracket to rotate horizontally by a preset angle until the polarizing mirror is aligned with the camera lens. In the above structure, the testing platform can clamp and fix the LCD protective film by setting a fixture. At the same time, a low-angle light source is set obliquely above the LCD protective film. The low-angle light source illuminates the product by illuminating the LCD protective film at an angle. In the specific testing, the low-angle light source is lit first, and then the rotation drive mechanism drives the polarizer bracket to rotate horizontally by a preset angle until the polarizer is aligned with the camera lens. Under the action of the polarizer, the image feature information below the polarizer in the LCD product is suppressed, so that the camera can accurately capture the scratches or dirt on the protective film, which helps to distinguish between stains on the film and internal stains. This part is the prior art, and the testing bracket is not shown in the figure.

[0023] A rotary workstation assembly capable of alternating use; the rotary workstation assembly includes a mounting plate 2 fixed on a bracket 1, a workstation plate 6 rotatably mounted on the upper end of the mounting plate 2, and a motor 7, which is a stepper motor, mounted on the bottom of the mounting plate 2, driving the workstation plate 6 to rotate 180° each time. A drive shaft 13 is fixed to the output end of the motor 7, and a detachable connecting sleeve 12 is sleeved on the drive shaft 13, with the connecting sleeve 12 fixed to the bottom of the workstation plate 6.

[0024] Because the LCD protective film has different sizes, the workstation plate 6 needs to be replaced. Specifically: the drive shaft 13 is provided with a locking groove 14, and a first permanent magnet 15 is fixed in the locking groove 14. A sliding locking pin 10 is provided through the connecting sleeve 12. A second permanent magnet 16 is fixed to the end of the locking pin 10. The locking pin 10 and the second permanent magnet 16 slide in the locking groove 14, and the first permanent magnet 15 and the second permanent magnet 16 abut against each other. The magnetic polarities of the abutting surfaces of the first permanent magnet 15 and the second permanent magnet 16 are opposite. The attraction between the two can ensure that the locking pin 10 is stably fastened in the locking groove 14, connecting the drive shaft 13 and the connecting sleeve 12. When disassembling, pull the locking pin 10 to separate the first permanent magnet 15 and the second permanent magnet 16, and then move the workstation plate 6 upward to disassemble.

[0025] The workstation plate 6 has a square, stepped workstation slot 8 running through it, and two retrieval slots 9 running through it, which facilitate the removal of the LCD protective film by the operator or robot from the side, or the LCD protective film can be held from the top by a suction cup; the workstation slot 8 is used to place the LCD protective film, and the workstation plate 6 rotates so that the LCD protective film in the workstation slot 8 is alternately located under the testing device 11. The testing device 11 cooperates with the low-angle light source 5 for testing. When one of the testing devices 11 is being tested, the tested LCD protective film in the other workstation slot 8 can be removed and a new LCD protective film can be placed for testing.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An LCD protection film surface interference detection device, characterized by, Include: Support (1), the support (1) is installed with fixed frame (3), the fixed frame (3) is installed with detection equipment (11) and low angle light source (5); Alternately used rotating station assembly;The rotating station assembly includes a mounting plate (2) fixed on the support (1), the upper end of the mounting plate (2) is rotatably mounted with a station plate (6), the station plate (6) is provided with a square and stepped station slot (8) through it, the station slot (8) is used for placing LCD protective film, the rotation of the station plate (6) makes the LCD protective film in the station slot (8) alternately located below the detection equipment (11), and the detection equipment (11) is cooperated with the low angle light source (5) to cooperate detection.

2. The LCD protection film surface interference detection device according to claim 1, characterized in that, Wherein: The support (1) includes a rectangular frame and four supporting legs, four supporting legs are welded and fixed on the bottom of the rectangular frame.

3. The LCD protection film surface interference detection device according to claim 1, characterized in that, Wherein: The fixed frame (3) is installed with a mounting bracket (4), and the low angle light source (5) is installed on the mounting bracket (4).

4. The LCD protection film surface interference detection device according to claim 1, characterized in that, Wherein: The bottom of the mounting plate (2) is provided with a motor (7), the output end of the motor (7) is fixed with a driving shaft (13), the driving shaft (13) is provided with a detachable connecting sleeve (12), and the connecting sleeve (12) is fixed on the bottom of the station plate (6).

5. The LCD protection film surface interference detection device according to claim 4, characterized in that, Wherein: The driving shaft (13) is provided with a lock slot (14), the first permanent magnet (15) is fixed in the lock slot (14), the lock pin (10) is slidably provided in the connecting sleeve (12), the second permanent magnet (16) is fixed on the end of the lock pin (10), the lock pin (10) and the second permanent magnet (16) slide in the lock slot (14), and the first permanent magnet (15) and the second permanent magnet (16) abut.

6. The LCD protection film surface interference detection device according to claim 5, wherein Wherein: The magnetic pole polarity of the abutting surface of the first permanent magnet (15) and the second permanent magnet (16) is opposite.

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