Optical film laminating system of cover plate

Abstract

The utility model provides an optical film laminating system for a cover plate, which is characterized by comprising an optical film, a cover plate base material, a laminating device, a low-temperature furnace, a high-temperature furnace, a bubble discharging device, a first cutting device and a conveying belt, the size of the optical film is larger than that of the cover plate base material; the laminating device is used for laminating the optical film to the cover plate base material to obtain an initial laminated cover plate; the bubble discharging device is used for discharging bubbles in the initial film pasting cover plate; the first cutting device is used for cutting the part, exceeding the cover plate base material, of the optical film in the initial film pasting cover plate; the conveying belt is used for sequentially conveying the initial film pasting cover plate to the low-temperature furnace, the high-temperature furnace, the bubble discharging device and the first cutting device, and therefore the finished product cover plate is obtained. The problem that white edges appear on the edge of the optical film due to adhesive residues caused by the bubble discharging device in the bubble discharging process is solved, and the bubble discharging effect and the shipment quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to an optical film laminating system for a cover plate. Background Art

[0002] Traditional coated cover plates are laminated with optical films cut to size, but the cut size of the optical film is usually cut with an inward shrinkage of 0.1 mm to prevent the cover plate from being pasted. In actual production, considering that the laminating equipment also has laminating tolerances, it may cause laminating deviation problems. At the same time, the outer size of the optical film is cut first, and then the scraper is used to remove bubbles, which will cause some colloid accumulation (residual colloid) on the edge, resulting in white edges on the appearance; in addition, the traditional method of baking bubbles only uses a high-temperature furnace for natural exhaust, which often leaves small bubbles. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes an optical film laminating system for a cover plate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The embodiment of the utility model provides an optical film laminating system for a cover plate, comprising: an optical film, a cover plate substrate, a laminating device, a low-temperature furnace, a high-temperature furnace, a bubble exhaust device, a first cutting device and a conveyor belt;

[0006] The size of the optical film is larger than the cover substrate;

[0007] The laminating device is used to laminate the optical film to the cover substrate to obtain an initial film-laminated cover;

[0008] The bubble exhaust device is used to exhaust bubbles in the initial film-applying cover plate;

[0009] The first cutting device is used to cut the portion of the optical film that exceeds the cover plate substrate in the initial film-attached cover plate;

[0010] The conveyor belt is used to sequentially convey the initial film-attached cover plate to the low-temperature furnace, the high-temperature furnace, the bubble exhaust device and the first cutting device, so as to obtain a finished cover plate.

[0011] As a preferred embodiment of the present invention, the optical film bonding system for the cover plate provided in the embodiment of the present invention further includes a second cutting device, and the second cutting device is used to cut the original optical film material into optical films.

[0012] As a preferred embodiment of the present invention, each side edge of the optical film extends beyond the corresponding side edge of the cover substrate by at least 5 mm.

[0013] As a preferred embodiment of the present invention, the temperature of the low-temperature furnace is -10°C, and the initial film-applying cover plate stays in the low-temperature furnace for 60 seconds.

[0014] As a preferred embodiment of the present invention, the temperature of the high temperature furnace is 50° C., and the initial film-attached cover plate stays in the high temperature furnace for 30 seconds.

[0015] As a preferred embodiment of the utility model, the bubble removal device includes a mechanical arm and a scraper;

[0016] When the initial film-laminating cover plate reaches the bubble removal device, the robotic arm drives the scraper to scrape out the bubbles between the optical film and the cover plate substrate.

[0017] As a preferred embodiment of the present invention, the scraper is made of soft rubber material or soft plastic material.

[0018] As a preferred embodiment of the present invention, the bottom edge of the scraper is at least 10 mm longer than the long side of the initial film-applying cover plate.

[0019] As a preferred embodiment of the utility model, the bubble removal device also includes an infrared sensor, which is used to detect the initial film-sticking cover plate, and when the initial film-sticking cover plate reaches the bubble removal device, the mechanical arm is started.

[0020] As a preferred embodiment of the present invention, the first cutting device is a laser cutting device.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are:

[0022] Through the technical scheme of the embodiment of the utility model, firstly, during bonding, the size of the optical film is larger than the cover substrate, so that it fully covers the cover substrate, and the bubbles between the two are discharged through the bubble discharge device before the excess part of the optical film is cut, so that the problem of optical film bias caused by the small size of the cut optical film and the bonding tolerance in the traditional process is avoided, and the problem of white edges caused by residual glue on the edge of the optical film caused by the bubble discharge device during the bubble discharge process is avoided; secondly, the initial film-bonding cover plate first passes through a low-temperature furnace to rapidly shrink the optical glue on the back of the optical film and the bubbles between the two are rapidly reduced, and then passes through a high-temperature furnace, so that the optical glue is still in a contracted state, but the bubbles expand rapidly, thereby improving the bubble discharge effect and improving the delivery quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of an optical film laminating system for a cover plate provided by the utility model;

[0024] Figure 2 A schematic structural diagram of an optical film laminating system for a cover plate provided by the utility model;

[0025] Figure 3 A side view of a bubble exhaust device provided by the utility model;

[0026] Figure 4 The utility model is a front view of a bubble exhaust device. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 1 The embodiment of the utility model provides an optical film bonding system for a cover plate, comprising: an optical film 100, a cover plate substrate 200, a bonding device 300, a low-temperature furnace 400, a high-temperature furnace 500, a bubble exhaust device 600, a first cutting device 700 and a conveyor belt 800;

[0032] The size of the optical film 100 is larger than that of the cover substrate 200;

[0033] The laminating device 300 is used to laminate the optical film 100 to the cover substrate 200 to obtain an initial film-laminated cover;

[0034] The bubble exhaust device 600 is used to exhaust bubbles in the initial film-applying cover plate;

[0035] The first cutting device 700 is used to cut the portion of the optical film in the initial film-attached cover plate that exceeds the cover plate substrate 100;

[0036] The conveyor belt 800 is used to sequentially convey the initial film-attached cover plate to the low-temperature furnace 400 , the high-temperature furnace 500 , the bubble exhaust device 600 and the first cutting device 700 , so as to obtain a finished cover plate 220 .

[0037] Through the technical scheme of the embodiment of the utility model, firstly, during bonding, the size of the optical film is larger than the cover substrate, so that it fully covers the cover substrate, and the bubbles between the two are discharged through the bubble discharge device before the excess part of the optical film is cut, so that the problem of optical film bias caused by the small size of the cut optical film and the bonding tolerance in the traditional process is avoided, and the problem of white edges caused by residual glue on the edge of the optical film caused by the bubble discharge device during the bubble discharge process is avoided; secondly, the initial film-bonding cover plate first passes through a low-temperature furnace to rapidly shrink the optical glue on the back of the optical film and the bubbles between the two are rapidly reduced, and then passes through a high-temperature furnace, so that the optical glue is still in a contracted state, but the bubbles expand rapidly, thereby improving the bubble discharge effect and improving the delivery quality.

[0038] As a preferred embodiment of the present invention, please refer to Figure 2 The optical film bonding system for the cover plate provided by the embodiment of the utility model further includes a second cutting device 710, and the second cutting device 710 is used to cut the original optical film material into the optical film 100. The second cutting device 710 is arranged before the bonding device 300.

[0039] As a preferred embodiment of the present invention, each side edge of the optical film 100 extends at least 5 mm beyond the corresponding side edge of the cover substrate 200. This arrangement has the advantage of providing tolerance for laminating device laminating errors and avoiding incomplete coverage of the optical film.

[0040] As a preferred embodiment of the present invention, the temperature of the low temperature furnace 400 is -10°C, and the initial film-attaching cover plate stays in the low temperature furnace 400 for 60 seconds. This setting causes the optical glue on the back of the optical film to shrink rapidly, the hardness of the optical glue will increase accordingly, and the bubbles remaining between the optical film and the cover plate substrate will shrink rapidly.

[0041] As a preferred embodiment of the present invention, the temperature of the high temperature furnace 500 is 50°C, and the initial film-attaching cover plate stays in the high temperature furnace 500 for 30 seconds. This is because the thermal expansion speed of the bubbles is faster than that of the optical glue. After the bubbles expand rapidly, the optical glue has not expanded completely and is still in a contracted state, with a relatively hard nature, which is conducive to the bubble removal effect of the next process.

[0042] As a preferred embodiment of the present invention, refer to Figure 3-4 , the bubble removal device 600 includes a mechanical arm 610 and a scraper 620;

[0043] When the initially film-attached cover plate reaches the bubble removal device 600 , the robot arm drives the scraper to scrape out the bubbles between the optical film 100 and the cover plate substrate 200 .

[0044] As a preferred embodiment of the present invention, the scraper 620 is made of soft rubber or soft plastic material, which can prevent the scraper from scratching the optical film during movement.

[0045] As a preferred embodiment of the present invention, the bottom edge 621 of the scraper 620 is at least 10 mm longer than the long side of the initial film-applying cover plate, which is conducive to the scraper completely covering the initial film-applying cover plate and avoiding air bubble leakage.

[0046] As a preferred embodiment of the present utility model, the bubble degassing device 600 further includes an infrared sensor, and the infrared sensor is used to detect the initial film-sticking cover plate, and when the initial film-sticking cover plate reaches the bubble degassing device 600, the robot arm is started.

[0047] When the initial film-sticking cover plate reaches the bubble removal device, it is identified by the infrared sensor, which sends a signal to start the robotic arm, driving the scraper to scrape from one side of the initial film-sticking cover plate to the other side, and quickly scrapes out the bubbles between the cover plate and the optical film. Due to the above process, the optical glue has not fully recovered to normal, and the harder optical glue makes the optical film harder as a whole, which is more conducive to the thoroughness of bubble removal.

[0048] As a preferred embodiment of the present invention, the first cutting device 700 is a laser cutting device, so that the cutting of the optical film is more accurate and does not damage the cover substrate.

[0049] As a preferred embodiment of the present invention, the optical film bonding system for the cover provided by the embodiment of the present invention further includes a detection device; the detection device is arranged after the first cutting device 700, and is used to detect whether there are still bubbles on the finished cover. If there are bubbles, an alarm is issued to prevent defective products from flowing out.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An optical film bonding system for a cover plate, characterized in that: include: Optical film, cover substrate, laminating device, low temperature furnace, high temperature furnace, bubble exhaust device, first cutting device and conveyor belt; The size of the optical film is larger than that of the cover substrate; The laminating device is used to laminate the optical film to the cover substrate to obtain an initial film-laminated cover; The bubble exhaust device is used to exhaust bubbles in the initial film-applying cover plate; The first cutting device is used to cut the portion of the optical film in the initial film-attached cover plate that exceeds the cover plate substrate; The conveyor belt is used to sequentially convey the initial film-attached cover plate to a low-temperature furnace, a high-temperature furnace, a bubble exhaust device and a first cutting device, so as to obtain a finished cover plate.

2. The optical film bonding system for a cover plate according to claim 1, characterized in that: Also included is a second cutting device, which is used to cut the original optical film material into the optical film.

3. The optical film bonding system according to claim 1, characterized in that: Each side edge of the optical film extends beyond the corresponding side edge of the cover substrate by at least 5 mm.

4. The optical film bonding system for a cover plate according to claim 1, characterized in that: The temperature of the low-temperature furnace is -10°C, and the initial film-attached cover plate stays in the low-temperature furnace for 60 seconds.

5. The optical film bonding system for a cover plate according to claim 1, characterized in that: The temperature of the high temperature furnace is 50° C., and the initial film-attached cover plate stays in the high temperature furnace for 30 seconds.

6. The optical film bonding system for a cover plate according to claim 1, characterized in that: The bubble removal device comprises a mechanical arm and a scraper; When the initially film-attached cover plate reaches the bubble removal device, the mechanical arm drives the scraper to scrape out the bubbles between the optical film and the cover plate substrate.

7. The optical film bonding system for a cover plate according to claim 6, characterized in that: The scraper is made of soft rubber material or soft plastic material.

8. The optical film bonding system for a cover plate according to claim 6, characterized in that: The bottom edge of the scraper is at least 10 mm longer than the long side of the initial film-applying cover plate.

9. The optical film bonding system for a cover plate according to claim 6, characterized in that: The bubble removal device also includes an infrared sensor, which is used to detect the initial film-sticking cover plate, and when the initial film-sticking cover plate reaches the bubble removal device, the mechanical arm is started.

10. The optical film bonding system for a cover plate according to claim 1, characterized in that: The first cutting device is a laser cutting device.

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