On-line detection tool for phase difference film

Abstract

The utility model is applicable to the field of phase difference film detection, and discloses a phase difference film on-line detection tool which is characterized in that a polarizer is arranged on the light emitting side of a surface light source, and a polarization analyzer is arranged on one side, facing the polarizer, of a transparent acrylic plate; the universal balls are matched with the universal ball seats arranged on the surface light source and the transparent acrylic plate, so that the surface light source and the polarizer are subjected to angle adjustment in multiple dimensions, and the polarization analyzer and the transparent acrylic plate are subjected to angle adjustment in multiple dimensions, and therefore, shutdown and manual sampling from a production line are not needed; by adjusting the angles of the polarizer and the polarization analyzer and enabling the phase difference film to be located between the polarizer and the polarization analyzer to be conveyed on line, on-line detection on various defects on the surfaces of the coated and cured phase difference film and other film materials can be achieved, the detection mode is simple, meanwhile, the production efficiency cannot be reduced, and the production cost is reduced. And compared with online AOI equipment detection, the detection cost is lower.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of phase difference film detection, especially to a kind of phase difference film online detection tool. BACKGROUND

[0002] Phase difference film is a kind of optical film, can cause the phase difference of light, thereby changing the phase distribution of light. It is widely used in display field, such as making into circular polarized light with linear polarizer and pasting on OLED display screen, which can eliminate screen reflection, improve contrast ratio and protect OLED display screen.

[0003] The manufacturing process of phase difference film is divided into stretching type and coating type, and there may be scratches, foreign matter, concave-convex, crystal point, bright point, defect, horizontal line, vertical line, uneven thickness, which causes color deviation in MD and TD directions during manufacturing process, and some such as liquid crystal coating, cross white point need to be observed under cross, some need to be observed under bright field, some need to be observed under dark field. These existing or potential defects seriously affect the delivery yield, and if not found in time, the display screen will appear color deviation, contrast ratio reduction, viewing angle narrowing and other problems after flowing into terminal, so the risk of product complaint is larger, therefore, the detection of phase difference film surface defect is crucial.

[0004] There are two ways to detect the surface of phase difference film and surface coating defect, one is to detect the surface defect of phase difference film online through online AOI (automatic optical inspection), which has high detection efficiency, but the online AOI equipment is expensive; the other is to take sample from production line manually after production line shutdown, and then detect through assembly fixture after pasting polarizing sheet, which is time-consuming and laborious, and affects production efficiency.

[0005] It can be seen that the prior art needs to be improved and improved. UTILITY MODEL CONTENT

[0006] The utility model discloses a kind of phase difference film online detection tool, to solve the detection cost high and the problem of artificial sampling detection time-consuming and laborious existed in the detection mode of the surface coating defect of existing phase difference film.

[0007] To achieve the above-mentioned purpose, the utility model provides the scheme:

[0008] A kind of phase difference film online detection tool, comprising area light source;Further comprising:

[0009] Polarizer, the polarizer is fixed in the light-emitting side of area light source;

[0010] Transparent acrylic plate, the transparent acrylic plate is oppositely arranged with polarizer;

[0011] a polarizer fixed on the side of the transparent acrylic plate facing the polarizer;

[0012] two mounting assemblies, each of which is provided with a universal ball, and one of the mounting assemblies is located on the back side of the area light source, and the other mounting assembly is located on one side of the transparent acrylic plate;

[0013] two universal ball seats, each of which is provided with a receiving cavity for accommodating a universal ball, and one of the universal ball seats is provided on the back side of the area light source, and the other universal ball seat is provided on the transparent acrylic plate.

[0014] Optionally, the polarizer and the polarimeter are located on two sides of the phase difference film to be detected.

[0015] Optionally, the universal ball seat comprises a seat plate and a receiving cavity cylinder vertically arranged on the seat plate, and the receiving cavity is arranged on the receiving cavity cylinder.

[0016] Optionally, a plurality of U-shaped notches are distributed on the cylinder wall of the receiving cavity cylinder.

[0017] Optionally, an outer threaded portion is arranged on the outer side of the cylinder wall of the receiving cavity cylinder, and the outer threaded portion is threadedly connected with a ring-shaped compression cap for compressing the receiving cavity cylinder.

[0018] Optionally, the phase difference film online detection tool further comprises a mounting beam; the mounting assembly comprises a connecting piece and a connecting rod detachably connected with the connecting piece; the universal ball is arranged at the end of the connecting rod, and the connecting piece is arranged on the mounting beam.

[0019] Optionally, the connecting piece is a frame-shaped connecting piece, and the frame-shaped connecting piece is movably sleeved on the mounting beam.

[0020] Optionally, the upper and lower parts of the mounting beam are provided with guide grooves, and the inner side of the frame-shaped connecting piece is provided with a sliding block slidingly matched with the guide grooves.

[0021] Advantages:

[0022] The phase difference film online detection tool provided by the utility model discloses that the polarizer is arranged on the light-emitting side of the area light source, the polarimeter is arranged on the side of the transparent acrylic plate facing the polarizer, and the area light source and the polarimeter are adjusted in multiple dimensions through the cooperation of the universal ball and the universal ball seat arranged on the area light source and the transparent acrylic plate, so that the phase difference film can be conveyed online between the polarimeter and the polarimeter through the adjustment of the angle of the polarimeter and the polarimeter, and the surface of the phase difference film can be detected online. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the online phase difference film detection fixture provided by this utility model installed on a coating machine.

[0024] Figure 2 This is a schematic diagram of the structure of the online phase difference film detection fixture provided by this utility model. Figure 1 .

[0025] Figure 3 yes Figure 2 Enlarged view of section A.

[0026] Figure 4 This is a schematic diagram of the structure of the online phase difference film detection fixture provided by this utility model. Figure 2 .

[0027] Figure 5 yes Figure 4 Enlarged view of section B.

[0028] Figure 6 This is a schematic diagram of the structure of the universal ball joint.

[0029] Explanation of icon numbers:

[0030] 1-Surface light source; 2-Polarizer; 3-Transparent acrylic plate; 4-Analyzer;

[0031] 5-Mounting components; 51-Connectors; 52-Linkage rods;

[0032] 6-Omnidirectional ball;

[0033] 7-Universal ball joint; 71-Seat plate; 72-Accommodating cavity; 721-Accommodating cavity; 722-U-shaped notch; 723-External threaded part;

[0034] 8-Ring pressure cap;

[0035] 9-Mounting beam; 91-Guide groove;

[0036] 10-Slider;

[0037] 11-UV coating machine; 12-phase difference film. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0040] It should also be noted that when an element is referred to as being "fixed to" or "provided on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0041] In addition, the descriptions involving "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0042] Please refer to Figures 1 to 6 The phase difference film 12 online detection tool can be used for detecting the surface of the phase difference film 12 and surface coating defects. Specifically, the phase difference film 12 online detection tool can be provided on the UV coating machine 11, but is not limited to this type of coating machine, and includes a surface light source 1, a polarizer 2, a transparent acrylic plate 3, a polarizer 4, two mounting assemblies 5 and two universal ball seats 7.

[0043] The polarizer 2 and the polarizer 4 can be polaroid, and the polarizer 2 can be fixed on the light-emitting side of the surface light source 1 by optical PSA glue (pressure sensitive adhesive for optical field). The transparent acrylic plate 3 is arranged opposite to the polarizer 2, and the polarizer can be fixed on the side of the transparent acrylic plate 3 facing the polarizer 2 by optical PSA glue. In this way, the transparent acrylic plate 3 can be used to provide a flat mounting platform for the polarizer 4 (the polarizer 2 can be flatly mounted by means of the light-emitting side of the surface light source 1), and when detecting the surface of the phase difference film 12 and the surface coating defects, the polarizer 4 will not shake, displace or change the angle, thereby ensuring the consistency of the light conditions during continuous online detection, and improving the accuracy and repeatability of the detection results.

[0044] Two mounting assemblies 5 can be connected with the surface light source 1 and the transparent acrylic plate 3 provided with the polarizer respectively, and each of the two mounting assemblies 5 is provided with a universal ball 6, and one of the two mounting assemblies 5 is located at the back side of the surface light source 1, and the other mounting assembly 5 is located at one side of the transparent acrylic plate 3. One of the two universal ball seats 7 is located at the back side of the surface light source 1, and the other is located on the transparent acrylic plate 3, and each of the two universal ball seats 7 is provided with a receiving cavity 721 for receiving the universal ball 6. Thus, through the cooperation of the universal ball 6 and the universal ball seat 7, the surface light source 1 and the polarizer 2 can be adjusted in multiple dimensions, and the transparent acrylic plate 3 and the polarizer 4 can also be adjusted in multiple dimensions, so that the phase difference film 12 can be conveyed between the polarizer 2 and the transparent acrylic plate 3 on line, and the surface of the phase difference film 12 and various defects after UV coating can be detected on line by adjusting the angle of the polarizer 2 and the polarizer 4. The detection method is simple, the production efficiency does not decrease, and the detection cost is lower than that of the online AOI equipment.

[0045] For example, when the polarization directions of the polarizer 2 and the polarizer 4 are parallel, the linearly polarized light emitted from the polarizer 2 can pass through the polarizer 4 to the maximum extent, and at this time, the light intensity reaching the observer's eye or the detection equipment is the strongest, forming a bright field. In this case, some defects such as coating discontinuity (defects such as lack of glue and uneven thickness) can be more easily observed due to the high contrast with the surrounding background. For example, when the polarization directions of the polarizer 2 and the polarizer 4 are perpendicular, the linearly polarized light emitted from the polarizer 2 cannot pass through the polarizer 4, and at this time, the observed light intensity is the weakest, forming a dark field. When there are defects such as scratches and foreign matters on the surface of the phase difference film 12, these defects can cause scattering, refraction or polarization state change of the light, so that part of the light that cannot pass through the polarizer can pass through, thereby forming a bright defect image on the dark background.

[0046] As shown in Figures 1 to 5 Optionally, the polarizer 2 and the polarizer 4 are located on the two sides of the phase difference film 12 to be detected respectively. When the polarizer 2 and the polarizer 4 are located on the two sides of the phase difference film 12 to be detected respectively, the phase difference film 12 is conveyed between the polarizer 2 and the polarizer 4. At this time, the detection of defects such as coating foreign matters, lack of glue and defects can be realized by penetrating the orthogonal and dark field detection.

[0047] As shown in Figures 4 to 6As shown in the figure, optionally, the universal ball seat 7 can be a plastic part with elastic deformation capability, and the universal ball seat 7 comprises a seat plate 71 and a containing cavity cylinder 72 vertically arranged on the seat plate 71. The seat plate 71 can be arranged on the back of the surface light source 1 and the transparent acrylic plate 3 by means of gluing, or can be detachably installed by punching holes on the back of the surface light source 1 and the transparent acrylic plate 3; the containing cavity is arranged on the containing cavity cylinder 72. In this embodiment, the elastic plastic part of the universal ball seat 7 can provide better adaptability, so that the universal ball 6 can be placed in the containing cavity cylinder 72.

[0048] As shown in the figure, Figure 6 Optionally, a plurality of U-shaped notches 722 are arranged on the cylinder wall of the containing cavity cylinder 72 at intervals, and the arrangement of the U-shaped notches 722 makes the containing cavity cylinder 72 more easily expanded, so that the universal ball 6 is more easily placed in the containing cavity cylinder 72.

[0049] As shown in the figure, Figure 6 Optionally, an external thread part 723 is arranged on the outer side of the cylinder wall of the containing cavity cylinder 72, and the external thread part 723 is threadedly connected with a ring-shaped compression cap 8, which is used to compress the containing cavity cylinder 72, so that there is a certain friction force between the inner wall of the containing cavity cylinder 72 and the universal ball 6, which can prevent the universal ball 6 from being separated from the containing cavity cylinder 72 while enabling the universal ball 6 to rotate in the containing cavity.

[0050] As shown in the figure, Figures 2 to 5 Optionally, the phase difference film 12 online detection tool further comprises a mounting beam 9. The mounting beam 9 can be welded on the rack structure of the existing UV coating machine 11. The mounting assembly 5 comprises a connecting piece 51 and a connecting rod 52 detachably connected with the connecting piece 51; the universal ball 6 is fixedly arranged on the end of the connecting rod 52, and the connecting piece 51 is arranged on the mounting beam 9. When the universal ball 6 is placed in the containing cavity cylinder 72, the surface light source 1 and the transparent acrylic plate 3 are connected with two mounting beams 9 through two mounting assemblies 5 respectively, and when the two mounting beams 9 are located on the two sides of the phase difference film 12, the polarizer 2 and the transparent acrylic plate 3 (the analyzer 4) can be located on the two sides of the phase difference film 12 to be detected respectively, so that the detection of defects such as coating foreign matter, lack of glue and defects can be realized by means of penetration of the orthogonal and dark field detection.

[0051] As shown in the figure, Figures 2 to 5 Optionally, the connecting piece 51 is a frame-shaped connecting piece 51, and the frame-shaped connecting piece 51 is movably sleeved on the mounting beam 9, so that the position of the mounting assembly 5 can be flexibly changed in the horizontal direction. When it is necessary to detect different positions of the phase difference film 12, the positions of the polarizer 2 and the analyzer 4 can be adjusted by moving the frame-shaped connecting piece 51, and the angle adjustment of the universal ball 6 and the universal ball seat 7 is matched, so that omnidirectional and fine adjustment can be realized, thereby meeting the needs of different detection scenes.

[0052] As Figures 2 to 5 shown, optionally, the upper and lower parts of the mounting beam 9 are provided with guide grooves 91, and the inner side of the frame-shaped connecting piece 51 is provided with sliding blocks 10 which are in sliding fit with the guide grooves 91. The fit of the guide grooves 91 and the sliding blocks 10 provides accurate guide for the sliding of the frame-shaped connecting piece 51. When adjusting the position of the mounting assembly 5, the sliding blocks 10 move along the guide grooves 91, which can ensure that the mounting assembly 5 slides smoothly in the preset direction, avoids deviation or shaking, and realizes accurate positioning. When detecting the phase difference film 12, the positions of the components such as the surface light source 1, the polarizer 2, the transparent acrylic plate 3 and the analyzer 4 can be accurately controlled, so that the light accurately irradiates the specific area of the phase difference film 12, and the accuracy and reliability of the detection are improved. In addition, the setting of the double guide grooves 91 can also limit the frame-shaped connecting piece 51, so that the frame-shaped connecting piece 51 cannot move randomly in the four directions of up, down, left and right, and the connection of the frame-shaped connecting piece 51 and the mounting beam 9 is more reliable.

[0053] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A phase difference film on-line detection tool, comprising a surface light source (1); characterized in that, Also include: A polarizer (2) is fixed on the light-emitting side of the surface light source (1); A transparent acrylic plate (3) is arranged opposite to the polarizer (2); An analyzer (4) is fixed on the side of the transparent acrylic plate (3) facing the polarizer (2); Two mounting assemblies (5) are provided with universal ball (6) on both, and one of the mounting assemblies (5) is located on the back side of the surface light source (1), and the other mounting assembly (5) is located on one side of the transparent acrylic plate (3); Two universal ball seats (7) are provided with accommodating cavities (721) for accommodating universal ball (6), and one of the universal ball seats (7) is provided on the back side of the surface light source (1), and the other universal ball seat (7) is provided on the transparent acrylic plate (3).

2. The phase difference film on-line inspection tool according to claim 1, wherein, The polarizer (2) and the analyzer (4) are respectively located on both sides of the phase difference film to be detected.

3. The phase difference film on-line inspection tool according to claim 1, wherein, The universal ball seat (7) comprises a seat plate (71) and a receiving cavity cylinder (72) vertically arranged on the seat plate (71), and the receiving cavity (721) is arranged on the receiving cavity cylinder (72).

4. The phase difference film on-line inspection tool according to claim 3, wherein, The cylinder wall of the receiving cavity cylinder (72) is provided with a plurality of U-shaped notches (722) distributed at intervals.

5. The phase difference film on-line inspection tool according to claim 4, wherein, The outer side of the cylinder wall of the receiving cavity cylinder (72) is provided with an external thread part (723), the external thread part (723) is threadedly connected with an annular compression cap (8), and the annular compression cap (8) is used for compressing the receiving cavity cylinder (72).

6. The phase difference film on-line inspection tool according to claim 1, wherein, Also include mounting beam (9); the mounting assembly (5) includes connecting piece (51) and connecting piece (51) detachably connected with connecting rod (52); the universal ball (6) is arranged at the end of the connecting rod (52), and the connecting piece (51) is arranged on the mounting beam (9).

7. The phase difference film on-line inspection tool according to claim 6, wherein, The connecting piece (51) is a frame-shaped connecting piece, and the frame-shaped connecting piece (51) is movably sleeved on the mounting beam (9).

8. The phase difference film on-line inspection tool according to claim 7, wherein, The upper and lower parts of the mounting beam (9) are provided with guide grooves (91), and the inner side of the frame-shaped connecting piece is provided with sliding blocks (10) slidingly matched with the guide grooves (91).

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