CN110165089A - A kind of glass substrate stripping system of flexible OLED panel - Google Patents

Abstract

The invention discloses a kind of glass substrate stripping systems of flexible OLED panel, circulation conveying mechanism including one to transport oled panel, the localization tool of several fixed oled panels is provided in the circulation conveying mechanism, the region that the circulation conveying mechanism is passed through is disposed with discharging device, laser lift-off device, glass moving-out device, support membrane laminating apparatus, turn-over rig and detection device, flexible OLED display panel removal glass substrate and patch PET support membrane full-automatic operation may be implemented in the present invention, each station can be with continuous work, it is high-efficient, it is easy to operate, high yield rate.

Description

A glass substrate peeling system for flexible OLED panels

technical field

The invention belongs to the field of flexible OLED panel production equipment, and more specifically relates to a glass substrate stripping system for a flexible OLED panel.

Background technique

Modern electronic technology is developing rapidly, especially the display technology, from the mature LCD to the more and more widely used OLED, and now it has developed into a flexible and bendable OLED display panel. The preparation of flexible OLED display panels is very different from ordinary OLED display panels, and the difficulty of production is relatively high, and the process is also very different from ordinary OLED display panels.

From a structural point of view, the most obvious difference between flexible OLED and ordinary OLED is that the flexible OLED panel removes the glass substrate at the bottom. However, the current flexible OLED panel is still made by laying a glass substrate on the bottom, and then making the structural layers of each OLED on the top.

Therefore, in the production of flexible OLED displays, removing the glass substrate at the bottom is an essential process operation.

In the production of flexible OLED display panels, multiple flexible OLED display panels are produced together on a large glass substrate. At this time, it is generally called a mother sheet. When cutting a single piece, there are currently two ways: 1. First remove the entire glass substrate of the master piece and replace it with a large PET protective film, and then cut it into a single piece of flexible OLED display panel; 2. Directly The mother OLED display panel is cut into a single piece together with the glass substrate; then the glass substrate is removed.

This technical solution is aimed at the second method, and the glass substrate peeling operation is performed on a single piece of flexible OLED display panel with a glass substrate. First cut the single piece and then remove the glass substrate. This method has certain advantages. The cut single piece can be tested first. A lot of follow-up costs.

At present, the peeling method of the glass substrate in the market basically adopts the method of laser peeling, and the PI molecules on the contact surface between the glass and the PI layer are interrupted by laser irradiation, and then the glass substrate and the OLED display panel can be separated. However, the current market for the glass of the glass substrate is a single-process manual operation. Except for the automatic completion of laser scanning, the rest requires manual placement, removal of the glass substrate and other operations, which is inefficient.

In addition, because the OLED panel is relatively fragile and the manufacturing cost is relatively high, after the glass substrate is removed, a PET support film needs to be attached. However, it is very easy to be damaged during transportation to the process of attaching the support film, causing unnecessary losses. At present, there is no integrated equipment for peeling off the glass and then attaching the support film.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a fully automatic operation for removing the glass substrate and pasting the PET support film of the flexible OLED display panel. Each station can work continuously, with high efficiency, simple operation and high yield.

In order to achieve the above object, the present invention provides the following technical solutions: a glass substrate peeling system for flexible OLED panels, including a circular conveying mechanism for transporting OLED panels, and the circular conveying mechanism is provided with a plurality of fixed OLED panel positioning As for the jig, the area passed by the circular conveying mechanism is sequentially provided with a material discharging device, a laser peeling device, a glass removing device, a supporting film laminating device, a flipping device and a detection device.

Further, the circular conveying mechanism includes a turntable, and several positioning fixtures are evenly distributed on the turntable, and the discharging device, laser stripping device, glass removal device, supporting film bonding device, flipping device and detection device are evenly distributed along the circumference on the outside of the turntable.

Further, the positioning jig is provided with at least two non-parallel side rails, and the positioning jig is provided with a push mechanism corresponding to the opposite direction of the side rails, and the side rails and the pushing mechanism form an accommodation area, and the positioning jig A number of negative pressure suction holes are provided corresponding to the accommodation area, and the negative pressure suction holes are connected with a vacuum generator.

Further, the discharging device includes a feeding table and a first linear pick-and-place robot arm, and the first linear pick-and-place robot arm extends from the feeding table to the circular conveying mechanism.

Further, the laser lift-off device includes a laser.

Further, the glass removal device includes a glass collection device and a second linear pick-and-place robot arm, and the second linear pick-and-place robot arm extends from the glass collection device to the circular conveying mechanism.

Further, the support film bonding device includes a support film introduction mechanism and a third linear pick-and-place manipulator, the support film introduction mechanism is provided with a support film jig, and the third linear pick-and-place manipulator is extended from the support film introduction mechanism to the circulation conveying mechanism .

Further, the structure of the supporting film jig is the same as that of the positioning jig.

Further, the flipping device includes a grabbing robot and a placing robot.

Further, a discharge table is provided beside the detection device, the detection device includes a telescopic conductive probe, and the telescopic conductive probe is connected to a power supply, and a fourth linear pick-and-place manipulator is provided between the detection device and the discharge table.

Compared with prior art, the beneficial effect of the present invention is:

1. Through this device, the fully automatic operation of removing the glass substrate, attaching the PET support film and final inspection of the flexible OLED display panel can be realized. Each station can work continuously, with high efficiency, simple operation and high yield;

2. The structure is positioned by the side of the positioning fixture, and the structure is simple and the positioning is accurate;

3. The turntable-type workbench, after loading the OLED display panel, is connected with the positioning jig to rotate together, only one positioning is required, which greatly improves the efficiency and accuracy.

Description of drawings

Fig. 1 is the schematic flow chart of the glass substrate stripping system of the flexible OLED panel of the present invention;

Fig. 2 is the structural representation of laser stripping device among the present invention;

Fig. 3 is the structural representation of glass removing device among the present invention;

Fig. 4 is a schematic structural view of a supporting film laminating device in the present invention;

Fig. 5 is the structural representation of turning over device among the present invention;

Fig. 6 is the structural representation of detection device among the present invention;

Fig. 7 is a structural schematic diagram 1 of the supporting film introducing mechanism in the present invention;

Fig. 8 is a structural schematic diagram II of the supporting film introducing mechanism in the present invention;

Fig. 9 is a schematic structural view of a sucker for taking and placing a supporting film in the present invention;

Fig. 10 is a schematic cross-sectional structure diagram of a positioning jig in the present invention;

Fig. 11 is a top view of the first embodiment of the positioning jig in the present invention;

Fig. 12 is a top view of the second embodiment of the positioning jig in the present invention.

Reference signs: 1. Feeding platform; 11. Feeding track; 12. Tray; 2. The first straight-line pick-and-place robot; 21. Robot; 22. Linear track; 3. Turntable; 4. Laser stripping device; 41 , laser; 5, positioning fixture; 51, negative pressure suction hole; 52, side bar; 53, push plate; 54, buffer pad; 55, positioning roller; 6, glass removal device; 61, the second line pick and place Manipulator; 62. Glass collection device; 63. Suction cup; 7. Supporting film bonding device; 71. The third straight line pick-and-place manipulator; 72. Guide rail; 73. Supporting film fixture; 74. Release film collection basket; 75 , spring; 8, turning device; 81, grasping manipulator; 82, placing manipulator; 9, detection device; 91, the fourth straight line pick and place manipulator; 92, telescopic conductive probe; 93, discharge table; 100, OLED panel; 700, support membrane.

Detailed ways

The embodiment of the glass substrate stripping system for OLED panel of the present invention will be further described with reference to FIG. 1 to FIG. 12 .

A glass substrate stripping system for a flexible OLED panel, comprising a circular conveying mechanism for transporting the OLED panel 100, the circular conveying mechanism is provided with a plurality of positioning jigs 5 for fixing the OLED panel 100, and the circular conveying mechanism passes through The area is provided with a discharge device, a laser peeling device 4, a glass removal device 6, a supporting film laminating device 7, a turning device 8 and a detection device 9 in sequence.

The working process is:

1. Place the OLED panel 100 on the positioning jig 5 through the discharging device, and make one side of the glass substrate face upward, and move the positioning jig 5 to the laser stripping device 4 by moving the circular conveying mechanism;

2. At this time, the laser stripping device 4 irradiates the OLED panel 100 to separate the glass substrate from the OLED panel 100;

3. The circular conveying mechanism continues to move to bring the OLED panel 100 to the glass removal device 6, and remove the detached glass substrate through the glass removal device 6, leaving only the flexible OLED panel 100 on the positioning jig 5;

4. The circular conveying mechanism moves to bring the flexible OLED panel 100 to the support film bonding device 7, and the support film bonding device 7 bonds the PET support film 700 on the flexible OLED panel 100 (that is, the original glass substrate);

5. The circulation conveying mechanism moves to move the flexible OLED panel 100 attached to the PET support film to the turning device 8, and the flexible OLED panel 100 is turned over by the turning device 8, so that the side of the PET support film faces downward;

6. The circulation conveying mechanism moves to move the flipped OLED panel 100 to the detection device 9, and the detection device 9 is used to detect the good or defective OLED panel 100;

7. After the detection is completed, the OLED panel 100 is taken out, and the above process is repeated.

The preferred circulating conveying mechanism in this embodiment includes a turntable 3, a plurality of positioning fixtures 5 are evenly distributed on the turntable 3, a discharge device, a laser stripping device 4, a glass removal device 6, a supporting film laminating device 7, a turntable The surface device 8 and the detection device 9 are evenly distributed outside the turntable 3 along the circumference.

In this embodiment, the number of positioning jigs 5 is preferably 6, and the number of positioning jigs 5 is matched according to several manufacturing processes required by this solution.

As shown in Figure 1, for the convenience of description, there are six positioning jigs 5 on the circulation conveying mechanism in this embodiment, and the positions of the six positioning jigs 5 are respectively named No. 1 station, No. 2 station, and No. 3 station. Station No. 4, Station No. 5 and Station No. 6.

Wherein the turntable 3 is connected with a driving mechanism, such as a stepping motor or other driving mechanism, so that the turntable 3 can rotate intermittently, and the turntable 3 rotates in a clockwise direction, and the OLED panel 100 is placed on the positioning fixture 5 of the No. 1 station. When the turntable 3 rotates to the No. 2 station, another positioning jig 5 will arrive at the discharge device at this time. When the laser 41 of the No. 2 station irradiates the OLED panel 100, the discharge device will send another OLED panel 100 After that, the turntable 3 continues to rotate, and all the positioning fixtures 5 move to the next station in sequence and work at the same time, forming a continuous processing operation on the OLED panel 100; The OLED panel 100 is positioned once at the station, and the subsequent processing operations are automatically aligned with each processing device as the turntable 3 rotates, without re-positioning, and the processing efficiency is higher.

The preferred positioning jig 5 of the present embodiment is provided with at least two non-parallel backing bars 52, and a push mechanism is arranged on the positioning jig 5 corresponding to the side bar 52 in the opposite direction, and the side bar 52 and the pushing mechanism form In the accommodation area, the positioning jig 5 is provided with several negative pressure suction holes 51 corresponding to the accommodation area, and the negative pressure suction holes 51 are connected with a vacuum generator.

As shown in FIG. 10, the OLED panel 100 is placed on the positioning jig 5, and a negative pressure is generated by a vacuum generator. The negative pressure suction hole 51 adsorbs and fixes the OLED panel 100 on the surface of the positioning jig 5, so that the OLED panel 100 is placed on each It can be kept in the original position during the station, and when the glass substrate is removed, the OLED panel 100 remains motionless when the supporting film is attached, and the position is accurate; when the OLED panel 100 needs to be released, such as at the turning device 8, this cut off the negative pressure at this station, release the OLED panel 100, so that it can be grasped and moved, the negative pressure suction hole 51 of each positioning fixture 5 preferred in this embodiment has a separate air pipe, all The branches of the trachea are connected to a main trachea or directly connected to the vacuum generator, and each branch trachea is provided with a reversing valve, which can connect the branch trachea to the main trachea or the vacuum generator; the reversing valve also After reversing, it can be disconnected from the main air pipe or vacuum generator and communicated with the outside world, so that there is no negative pressure inside. Through this setting, the adsorption or release of the OLED panel 100 at each station can be individually and precisely controlled.

As shown in Fig. 11 and Fig. 12, there are two side bars 52 on the positioning jig 5, and the angle between the two side bars 52 can be determined according to the edge shape of the OLED panel 100, usually in an L-shaped arrangement, And preferably, the two edge bars 52 do not touch each other, so as to leave a space for the top corner of the OLED panel 100 to extend into. When the OLED panel 100 is positioned, the discharge device puts the OLED panel 100 into the accommodation area, and pushes the OLED panel 100 into the accommodation area. The mechanism pushes the edge of the OLED panel 100, so that the OLED panel 100 is close to the two side bars 52. At this time, the position of the OLED panel 100 is determined, and the negative pressure suction hole 51 firmly absorbs the OLED panel 100 to the positioning fixture through negative pressure. 5 surface, the fixing of the OLED panel 100 is completed.

As shown in Figure 11, wherein the pushing mechanism is a push plate 53, and the push plate 53 is connected to an air cylinder, a hydraulic cylinder or a linear motor to move, and preferably at least two push plates 53 are arranged on one side of the longer side of the OLED panel 100 to prevent The OLED panel 100 is tilted and shifted and cannot be positioned accurately. After the OLED panel 100 is placed in the accommodation area, the edge of the OLED panel 100 can be closely attached to the edge bar 52 by moving the push plate 53 to complete the positioning. A buffer pad 54 is arranged on the surface, and the material of the buffer pad 54 can be silica gel.

As shown in Figure 12, wherein the pushing mechanism can also be a positioning roller 55, the same positioning roller 55 is connected to a corresponding driving mechanism, an air cylinder, a hydraulic cylinder or a linear motor, and the positioning roller 55 can rotate freely at the same time, that is, the positioning roller 55 and the drive The ends of the mechanism are connected through shaft rotation. When the OLED panel 100 is pushed, the positioning roller 55 contacts the edge of the OLED panel 100. At the same time, the OLED panel 100 moves toward the side bar 52 to correct its posture. At this time, the positioning roller 55 and the The edge rolling friction of the OLED panel 100 reduces the wear and tear on the OLED panel 100 . Of course, the surface of the positioning roller 55 can still be provided with a buffer pad 54 for further protection.

The preferred discharging device in this embodiment includes a feeding table 1 and a first linear pick-and-place robot 2, and the first linear pick-and-place robot 2 extends from the feeding table 1 to the circular conveying mechanism.

Wherein the first linear pick-and-place manipulator 2 comprises a straight track 22, and the manipulator 21 can move on the straight track 22, that is, the straight track 22 straddles the feeding platform 1 and the turntable 3, so that the manipulator can reach the No. 1 station. It is preferably a universal manipulator, and its grabbing method is a suction cup 63 type. The universal manipulator of the suction cup 63 formula is a prior art, and the applicant does not repeat it here. The second straight line mentioned in this embodiment takes Putting manipulator 61, the 3rd linear pick-and-place manipulator 71, the 4th straight line pick-and-place manipulator 91, grasping manipulator 81 and placement manipulator 82 all can be this structure.

The OLED panel 100 to be processed is placed on the feeding table 1, and the manipulator directly grabs the OLED panel 100, and then moves to the top of the No. 1 station through the linear track 22, and places the OLED panel 100 on the positioning fixture 5 at this time. Positioning process, and the manipulator returns to the top of the feeding table 1 and waits to grab the next OLED panel 100; wherein a feeding track 11 can be set on the feeding table 1, and a plurality of trays 12 are arranged above it, and the OLED panel 100 is placed on the On the tray 12, each time the tray 12 is moved to a fixed position, when the manipulator returns to the top of the feeding table 1, it can grab (adsorb) the OLED panel 100 directly downwards. A slight deviation is allowed here and is not Affecting the manipulator to grab the OLED panel 100 will not affect the manipulator to accurately put it into the accommodation area of the No. 1 station. At this time, the manipulator only needs to move back and forth in a straight line to improve the discharging efficiency.

As shown in Figure 2, the preferred laser stripping device 4 in this embodiment includes a laser 41, wherein the laser 41 adjusts the angle of the laser light through a reflector, injects the laser lens into the glass to scan the glass, and irradiates the glass substrate of the OLED panel 100 with the laser light Separating the glass substrate is a prior art, and the applicant does not repeat the specific principle here. Since the OLED panel 100 has been positioned at the No. 1 station, when it turns to the No. 2 station, each OLED panel that arrives 100 are in the same position, so it is only necessary to initially set the laser scanning path, and the laser lift-off device 4 does not need to be repositioned separately with the OLED panel 100 each time.

As shown in FIG. 3 , the glass removal device 6 includes a glass collection device 62 and a second linear pick-and-place robot arm 61 , and the second linear pick-and-place robot arm 61 extends from the glass collection device 62 to the circular conveying mechanism.

After the OLED panel 100 is irradiated by the laser 41 at the second station, its glass substrate has been separated from the flexible OLED panel 100. At this time, the glass substrate is picked up by the robot at the third station and transported to the glass collector through the linear track 22. It can be in the device 62, wherein the collection device can be a collection barrel or a collection box, as a waste collection device.

As shown in Fig. 4, Fig. 7 and Fig. 8, the preferred supporting film bonding device 7 of this embodiment includes a supporting film introducing mechanism and a third linear pick-and-place manipulator 71, and a supporting film fixture is arranged on the supporting film introducing mechanism 73. The third linear pick-and-place manipulator 71 extends from the supporting film introduction mechanism to the circulation conveying mechanism.

Wherein the supporting film jig 73 has the same structure as the positioning jig 5 .

In the present application, the support film introduction mechanism can have an introduction guide rail 72, wherein there can be multiple support film fixtures 73, the support film is placed on the support film fixture 73, and the multiple support film fixtures 73 move on the guide rail, supporting The film fixture 73 moves the supporting film to the bottom of the manipulator;

In order to reduce the equipment cost, only one support film fixture 73 can be provided, and a plurality of support films are placed beside the support film fixture 73 of the support film introduction mechanism, and the support film is moved to the support film fixture 73 by the manipulator for positioning operation, and then The manipulator sucks up the support film, and the release film that was originally attached to the support film is adsorbed on the surface of the support film fixture 73. As the manipulator moves to the top of the No. 4 station, each flexible OLED that reaches the No. 4 station The positions of the panels 100 are all the same, so the manipulator moves according to the preset position and puts down the support film so that the support film and the flexible OLED panel 100 can fit together;

Preferably, a release film collection basket 74 is set beside the support film fixture 73 for collecting the release film left on the support film fixture 73; as shown in Figure 7, a linear pick-and-place robot A can be additionally set for Grab the release film into the collection basket; as shown in Figure 8, removing the release film can also be a linear pick-and-place manipulator B with a rotating arm. This linear pick-and-place manipulator with a rotating arm first pulls the support film The film introduction mechanism moves to the support film jig 73, and after the third linear pick-and-place manipulator 71 removes the support film, the linear pick-and-place manipulator with a rotating arm moves the release film to the release film collection basket 74 That is, in order to avoid mutual influence of each manipulator, each manipulator can be arranged at different heights.

As shown in Figure 9, the sucker 63 type manipulator of the third linear pick-and-place manipulator 71 in the present embodiment has a plurality of suckers 63, and there are several groups of springs 75 between the plurality of suckers 63 and the main body of the manipulator, and several groups of springs 75 The length is arranged in steps, so that the suction cup 63 on one side is higher than the other side, and it is arranged in steps. Of course, the same length spring 75 can also be used here, but the manipulator itself is slightly inclined, and only needs to reach the height of the suction cup 63. Just arrange it. When the suction cups 63 are pressed down, all the suction cups 63 will suck the support film at the same time. When pulling up, the side of the suction cup 63 at a higher position will be pulled up first, so that the side of the support film will be pulled up first, which is easier The support film is separated from the release film; the fully pulled support film is also in a tilted state, and when it is attached to the flexible OLED panel 100, the lower end is first in contact with the flexible OLED panel 100 and then attached. Extend the fit to the other side, and the fit is smooth without air bubbles.

As shown in FIG. 5 , the preferred flipping device 8 of this embodiment includes a grabbing robot 81 and a placing robot 82 .

At this time, the two manipulators can be placed on the same linear track 22. When the flexible OLED panel 100 moves to the No. The OLED panel 100 faces the placing manipulator 82, the placing manipulator 82 absorbs the other side of the flexible OLED panel 100, the grasping manipulator 81 is released, and the placing manipulator 82 rotates 90° to put the flexible OLED panel 100 back to the positioning jig 5 of the fifth station The flipping action is completed.

The discharging device in this embodiment can also use the same manipulator as the flipping device 8. When the OLED panel 100 is in production, the glass side basically faces downward. At this time, the peeling system can be directly connected to the production line. The produced OLED panel 100 is directly transported to the discharge device, and is grabbed by the robot arm to the No. 1 station, and at the same time completes the turning action so that the glass substrate faces upward.

As shown in Figure 6, a discharge table 93 is arranged beside the detection device 9, and the detection device 9 includes a telescopic conductive probe 92, and the telescopic conductive probe 92 is connected to a power supply, and the connection between the detection device 9 and the discharge table 93 A fourth linear pick-and-place manipulator 91 is arranged between them.

Among them, the telescopic conductive probe 92 only needs to connect the conductive probe to the telescopic mechanism. After the flexible OLED panel 100 turned over by the fifth station reaches the sixth station, the telescopic conductive probe 92 is stretched out and contacts the flexible OLED panel 100. If the display panel lights up, it means that the product is qualified, otherwise it is a defective product. After the inspection is completed, the retractable conductive probe 92 is retracted, and it is grabbed by the fourth straight line pick-and-place manipulator 91 to the discharge table 93, so that The positioning jig 5 is vacant, and when it rotates to the No. 1 station, it can smoothly receive a new OLED panel 100 to be processed, so as to realize the cyclic processing operation.

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (10)

1. A glass substrate stripping system for a flexible OLED panel, characterized in that: it includes a circular conveying mechanism for transporting the OLED panel, the circular conveying mechanism is provided with several positioning fixtures for fixing the OLED panel, and the circular conveying mechanism The area where the mechanism passes is provided with a discharging device, a laser peeling device, a glass removing device, a supporting film laminating device, a flipping device and a detection device in sequence. 2. The glass substrate peeling system for flexible OLED panels according to claim 1, characterized in that: the circular conveying mechanism includes a turntable, and several positioning jigs are evenly distributed on the turntable, a feeding device, a laser peeling device, The glass removing device, the supporting film laminating device, the flipping device and the detecting device are evenly distributed on the outside of the turntable along the circumference. 3. The glass substrate stripping system for flexible OLED panels according to claim 1, characterized in that: said positioning jig is provided with at least two non-parallel side bars, and the positioning jig corresponds to the relative direction of the side bars A pushing mechanism is provided, and the side bar and the pushing mechanism form an accommodation area. The positioning jig is provided with several negative pressure suction holes corresponding to the accommodation area, and the negative pressure suction holes are connected with a vacuum generator. 4. The glass substrate stripping system for flexible OLED panels according to claim 1, wherein the discharging device includes a feeding table and a first linear pick-and-place manipulator, and the first linear pick-and-place manipulator consists of The feeding table extends to the circular conveying mechanism. 5. The glass substrate stripping system for flexible OLED panels according to claim 1, wherein the laser stripping device comprises a laser. 6. The glass substrate stripping system for flexible OLED panels according to claim 1, wherein the glass removal device includes a glass collecting device and a second linear pick-and-place robot, and the second linear pick-and-place robot is collected by glass The device extends to the circulation delivery mechanism. 7. The glass substrate peeling system for a flexible OLED panel according to claim 1, wherein the support film bonding device includes a support film introduction mechanism and a third linear pick-and-place manipulator, and the support film introduction mechanism is provided with a support The film jig and the third linear pick-and-place manipulator extend from the supporting film introduction mechanism to the circular conveying mechanism. 8 . The glass substrate peeling system for flexible OLED panels according to claim 7 , wherein the structure of the support film jig is the same as that of the positioning jig. 9 . The glass substrate peeling system for flexible OLED panels according to claim 1 , wherein the flipping device includes a grabbing robot and a placing robot. 10 . 10. The glass substrate peeling system of the flexible OLED panel according to claim 1, characterized in that: a discharge table is arranged next to the detection device, the detection device includes a telescopic conductive probe, and the telescopic conductive probe is connected to a power supply, A fourth linear pick-and-place manipulator is arranged between the detection device and the discharge table.