CN116828936A - Film pasting mechanism, film pasting production line and film pasting method of display device - Google Patents

Abstract

The invention discloses a film pasting mechanism, a film pasting production line and a film pasting method of a display device, wherein the film pasting mechanism comprises the following components: the attaching platform is used for bearing the display device to be attached; the lifting assembly is erected above the attaching platform; the leveling component is in transmission connection with the lifting component and is arranged opposite to the attaching platform; the film sticking roller is arranged at one side edge of the sticking platform; the leveling assembly is driven by the lifting assembly to be switched back and forth between an initial position and a leveling position along the vertical direction; the leveling assembly is in mechanical or fluid contact with an edge of the display device to be laminated when the leveling assembly is in the leveling position. Therefore, the problem that alignment is affected due to warping of the flexible display device is solved, the film pasting support yield of the flexible display device is greatly improved, and normal operation of a flexible display device production assembly line is ensured.

Description

Film pasting mechanism, film pasting production line and film pasting method of display device

Technical Field

The invention relates to the field of photoelectric display, in particular to a film pasting mechanism, a film pasting production line and a film pasting method of a display device.

Background

The development of the current photoelectric display field has deeply covered industries such as intelligent equipment, vehicle-mounted display, chemical materials, flexible wearing, aerospace, national defense and military industry and the like, and multi-system display technologies such as LCD, OLDE, QLED, mini LED, micro LDE and the like are emerging. Flexible display devices are becoming a research hotspot for next generation display technologies due to their characteristics of being foldable, flexible, lightweight, thin, portable, and wide viewing angle. Fig. 1 shows a schematic diagram of a laminated structure of a flexible display device 1 in the prior art, in which an OLED light emitting layer 13, a film packaging layer 14, a barrier layer 15 and a polarizing layer 16 are sequentially stacked on an upper surface of a flexible substrate 12 in the display device 1 from bottom to top, wherein a flip chip film 17 is bonded to an outer peripheral edge of the OLED light emitting layer 13, a printed circuit board 18 is bonded to a part of the flip chip film 17, a glass carrier 11 is attached to a lower surface of the flexible substrate 12, after pretreatment such as cleaning, the glass carrier 11 irradiates an interface between the flexible substrate 12 and the glass carrier 11 of the flexible display device 1 with a focused laser beam, si—o bonds and van der waals forces of the interface are broken and eliminated, so that the flexible substrate 12 and the glass carrier 11 are smoothly separated, and then post-processing processes such as Delami (separation), ash detection, BP film (supporting film) attachment, and the like are performed.

In the current photoelectric display field, film laminating equipment is widely applied to a flexible OLED/QLED device process, and three laminating modes are generally adopted in the industry: roller bonding, drum bonding, sheet bonding. The Roller and Sheet bonding method is mainly applied to medium and small size display panels, the Drum bonding method is mainly applied to large size display panels, and fig. 3 shows a schematic diagram of a conventional bonding process: film 22 is carried on film carrying platform 21, PI device 25 carried on substrate platform 23 is aligned with film 22, and attaching roller 24 starts to roll and attach film 22 to the surface of PI device 25.

In the process of sticking films to a flexible display device by adopting traditional film sticking equipment, the following technical problems still exist:

the flexible display device is thinner, the whole thickness is generally not higher than 500 μm, and along with the development trend of the updating of the display technology, the thickness of the device needs to be further reduced in order to realize the flexible and curlable flexible display device. Flexible display devices currently mainly use PI (polyimide) as a substrate, and after the LLO (laser lift off) process is completed, a BP film (support film) bonding process follows. At this moment, because the original glass carrier plate 11 is stripped, the four corners and the edge local area of the flexible display device are warped to different degrees, the serious warping height difference can reach more than 1cm (relative to the horizontal plane of the device), when the flexible display device is subjected to BP film lamination alignment, because the four corners and the edge of the flexible display device are warped to different degrees, the alignment Mark (Mark point) of the flexible display device is also subjected to space displacement along with the warpage, the visual alignment lens of the lamination equipment cannot grasp Mark (Mark point) coordinate information, the lamination platform cannot perform alignment compensation action, the lamination action cannot be executed, and the whole module manufacturing process is interrupted, as shown in fig. 4. In summary, flexible display devices face significant challenges due to their ease of warpage characteristics compared to rigid display devices, which are needed to be addressed from an equipment and process perspective.

In view of the foregoing, there is a need for developing a film laminating mechanism, a film laminating line and a film laminating method for a display device, which solve the above-mentioned problems.

Disclosure of Invention

The embodiment of the invention provides a film pasting mechanism, a film pasting production line and a film pasting method of a display device, which solve the problem that the alignment is influenced by the warping of a flexible display device from the angles of film pasting equipment and process, greatly improve the film pasting supporting yield of the flexible display device and ensure the normal operation of a production assembly line of the flexible display device.

In order to solve the technical problems, the embodiment of the invention discloses the following technical scheme:

in one aspect, there is provided a film sticking mechanism of a display device, including:

the attaching platform is used for bearing the display device to be attached;

the lifting assembly is erected above the attaching platform;

the leveling component is in transmission connection with the lifting component and is arranged opposite to the attaching platform; and

the film sticking roller is arranged at one side edge of the sticking platform;

the leveling assembly is driven by the lifting assembly to be switched back and forth between an initial position and a leveling position along the vertical direction; the leveling assembly is in mechanical or fluid contact with an edge of the display device to be laminated when the leveling assembly is in the leveling position.

In addition to or in lieu of one or more of the features disclosed above, the film roll applies the film to be applied to the flexible substrate of the display device when the leveling assembly is reset to the initial position.

In addition to or in lieu of one or more of the features disclosed above, the display device to be attached includes a body region and a peripheral region disposed about the body region;

the leveling component is a frame-shaped structure with a hollowed-out area, when the leveling component is positioned at the leveling position, the hollowed-out area corresponds to the main body area, and the frame-shaped structure is in mechanical contact or fluid contact with the peripheral area.

In addition to or in lieu of one or more of the features disclosed above, the lower surface of the frame structure is provided with an elastic cushioning layer, and the hollowed-out region corresponds to the body region when the leveling assembly is in the leveling position, and the elastic cushioning layer is in mechanical contact with the peripheral region.

In addition to or in lieu of one or more of the features disclosed above, the lower surface of the frame-shaped structure is provided with a plurality of nozzles, the hollowed-out area corresponds to the main body area when the leveling assembly is located at the leveling position, the plurality of nozzles face the display device to be laminated, and air currents sprayed by the plurality of nozzles are in fluid contact with the peripheral area.

In addition to or in lieu of one or more of the features disclosed above, the cross-sectional area of the air flow emitted by the nozzle increases gradually in a direction toward the conforming platform.

In addition to or in lieu of one or more of the features disclosed above, the bonding stage has disposed thereon a vacuum suction zone for vacuum suction of the display device to be bonded.

In another aspect, there is further disclosed a film laminating line for a display device, in addition to or instead of one or more of the features disclosed above, comprising:

the film material feeding guide rail extends along a first direction, and a plurality of film carrying platforms are transferred to the film material feeding guide rail in a turnover manner;

the device feeding guide rail is opposite to the film material feeding guide rail and is arranged in parallel, and a plurality of material carrying platforms are transferred to the device feeding guide rail in a turnover manner;

the film pasting guide rail is arranged between the film material feeding guide rail and the device feeding guide rail and is respectively butted with the film material feeding guide rail and the device feeding guide rail;

wherein the film pasting guide rail is provided with the film pasting mechanism according to any one of the above.

On the other hand, further discloses a film pasting method of the display device, which comprises the following steps:

providing a display device to be bonded of the peeled carrier substrate;

vacuum adsorption is carried out on the display device to be laminated by utilizing a lamination platform;

mechanically or fluidly contacting the edge of the display device to be attached by using a leveling assembly to level the edge of the display device to be attached;

covering a film to be attached on the flattened display device;

the film is roll laminated to a flexible substrate of a display device.

In addition to or in lieu of one or more of the features and/or steps disclosed above, the flattened area of the display device to be laminated is vacuum absorbed using the lamination platform.

One of the above technical solutions has the following advantages or beneficial effects: the edge warping part of the flexible display device can be leveled before the film is pasted, so that the problem that the alignment is influenced due to the warping of the flexible display device is solved, the film pasting supporting yield of the flexible display device is greatly improved, and the normal operation of the flexible display device production assembly line is ensured.

Drawings

The technical solution and other advantageous effects of the present invention will be made apparent by the following detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic view showing a laminated structure of a flexible display device in the prior art

FIG. 2 is a top view of a flexible display device with a glass carrier plate peeled off, in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a bonding process;

fig. 4 is a structural diagram of a film sticking mechanism provided in embodiment 1 of the present invention;

FIG. 5 is a block diagram of a leveling assembly in the film laminating mechanism according to embodiment 1 of the present invention;

fig. 6 is a block diagram of an alignment module in the film laminating mechanism provided in embodiment 1 of the present invention;

fig. 7 is a structural diagram of a film sticking mechanism provided in embodiment 2 of the present invention;

FIG. 8 is a block diagram of a leveling assembly in a film laminating mechanism according to embodiment 2 of the present invention;

fig. 9 is a structural view of a nozzle in a film sticking mechanism provided in embodiment 2 of the present invention;

fig. 10 is a schematic diagram of a film laminating line according to an embodiment of the present invention.

Reference numerals illustrate:

1: a display device; 11: a glass carrier plate; 12: a flexible substrate; 13: an OLED light emitting layer; 14: a thin film encapsulation layer; 15: a barrier layer; 16: a polarizing layer; 17: a flip chip film; 18: a printed circuit board; 19: a gate flip chip film; 121: a body region; 122: a peripheral region; 123: marking points;

21: a film carrying platform; 22: a film; 23: a substrate stage; 24: attaching a roller; 25: a PI device;

3: the film sticking mechanism of embodiment 1; 31: the bonding stage of example 1; 32: the lift assembly of embodiment 1; 33: the leveling assembly of example 1; 34: the film roll of example 1; 321: the lift drive of embodiment 1; 322: the vacuum chuck of example 1; 331: hollow areas; 332: leveling the frame; 35: an alignment module; 351: aligning the camera;

4: the film sticking mechanism of example 2; 41: laminating platform of example 2; 42: the lift assembly of embodiment 2; 43: the leveling assembly of example 2; 44: the film roll of example 2; 421: the lift drive of embodiment 2; 422: the vacuum chuck of example 2; 431: a nozzle; 432: a gas flow;

5: a film pasting production line; 51: a film pasting platform; 52: a film material feeding guide rail; 53: a film carrying platform; 54: a film material feeding platform; 541: a film; 55: a film pasting guide rail; 56: a device loading guide rail; 561: a second feeding station; 57: a material carrying platform; 58: a device cache platform; 59: and a manipulator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in 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 configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1

Referring to fig. 4 to 6, fig. 4 is a block diagram of a film sticking mechanism 3 according to embodiment 1 of the present invention; fig. 5 is a block diagram of a leveling component 33 in the film sticking mechanism 3 according to embodiment 1 of the present invention; fig. 6 is a block diagram of the alignment module 35 in the film laminating mechanism 3 according to embodiment 1 of the present invention. Fig. 1 shows a schematic diagram of a laminated structure of a flexible display device 1 in the prior art, in which an OLED light emitting layer 13, a thin film packaging layer 14, a barrier layer 15 and a polarizing layer 16 are sequentially stacked on an upper surface of a flexible substrate 12 in the display device 1 from bottom to top, wherein a flip chip film 17 is bonded to a peripheral edge of the OLED light emitting layer 13, a printed circuit board 18 is bonded to a part of the flip chip film 17, a glass carrier 11 is attached to a lower surface of the flexible substrate 12, after pretreatment such as cleaning, the glass carrier 11 irradiates an interface between the flexible substrate 12 and the glass carrier 11 of the flexible display device 1 with a focused laser beam, si—o bonds and van der waals forces of the interface are broken and eliminated, so that the flexible substrate 12 is smoothly separated from the glass carrier 11, and then post-processing processes such as Delami (separation), ash detection and BP film (supporting film) attachment are performed, as no special description is provided, and the flexible display device 1 described below represents the flexible display device after the glass carrier 11 is peeled.

The film pasting mechanism 3 provided in this embodiment is capable of flattening the edge warpage portion of the flexible display device 1 before pasting the film, so as to overcome the problem that the alignment of the flexible display device 1 is affected by warpage. The film sticking mechanism 3 of the flexible display device provided in the present embodiment includes: lamination stage 31, lifting assembly 32, leveling assembly 33, and lamination roller 34. The attaching platform 31 is used for bearing the display device 1 to be attached; the lifting assembly 32 is erected above the attaching platform 31; the leveling component 33 is in transmission connection with the lifting component 32 and is arranged opposite to the attaching platform; the film laminating roller 34 is disposed at one side edge of the laminating platform 31.

The leveling component 33 is driven by the lifting component 32 to be reciprocally switched between an initial position and a leveling position along the vertical direction; with the leveling assembly 33 in the leveling position, the leveling assembly 33 is in mechanical or fluid contact with the edge of the display device 1 to be bonded to level the warped edge of the display device 1. Further, the film roll 34 roll-bonds the film 541 to the flexible substrate 12 of the display device 1, while the leveling assembly 33 is reset to the initial position. In this embodiment, the initial position is located directly above the leveling position; the leveling position is slightly higher than the display device 1, and the leveling position may be equal to the upper surface of the flexible display device 1 or slightly lower than the upper surface of the display device 1.

In the embodiment shown in fig. 4, the lift assembly 32 includes: at least two fixedly arranged lifting drives 321 and at least two vacuum chucks 322. Each vacuum chuck 322 is in driving connection with a corresponding one of the lift drivers 321; wherein, after the vacuum chuck 322 sucks the leveling component 33, the lifting driver 321 drives the vacuum chuck 322 to drive the leveling component 33 to lift reciprocally along the vertical direction so as to approach or separate from the flexible display device 1 below.

Referring to fig. 5, fig. 5 is a block diagram of a leveling component 33 in a film pasting mechanism 3 provided in embodiment 1 of the present invention, in the embodiment shown in fig. 5, the leveling component 33 is a frame structure with a hollowed-out area 331, and the leveling position is slightly lower than the height of the upper surface of the flexible display device 1; when the leveling component 33 is located at the leveling position, the hollowed-out area 331 corresponds to the main body area 121, and the frame-shaped structure is in mechanical contact with the peripheral area 122. The leveling frame 332 of the leveling assembly 33 thus performs pressing leveling on the edge tilting area of the flexible display device 1, so that the subsequent film pasting process on the flexible display device 1 is facilitated.

Referring to fig. 2 and 5, fig. 2 is a top view of a flexible display device provided by the embodiment of the present invention after the glass carrier is peeled off, as can be seen from fig. 2, the flexible display device 1 includes a body region 121 (a region surrounded by a dashed square), and a peripheral region 122 (a region outside the dashed square) surrounding the periphery of the body region 121, the peripheral region 122 includes a plurality of Gate flip-chip films 19 (Gate COFs) bonded on a short side of the body region 121, a plurality of Source flip-chip films 17 (Source COFs) bonded on a long side of the body region 121, and a Printed Circuit Board (PCB) bonded to the Source flip-chip films 17 on the same side, in this embodiment, the body region 121 has a size of 697.32 × 409.68mm, the number of Source flip-chip films 17 is 16, the pitch between adjacent Source flip-chip films 17 is 25.3mm, the number of Gate flip-chip films 19 is 12, and the pitch between adjacent Gate flip-chip films 19 is 21.8mm; when the leveling assembly 33 is located at the leveling position, the leveling frame 332 of the leveling assembly 33 is attached to the peripheral area 122, and the hollowed-out area 331 is shaped and sized to fit the main area 121, so as to expose the main area 121. With the structure, the flexible display device 1 can be prevented from avoiding the main body region 121, and the main body region 121 is prevented from being damaged in the pressing process, so that the warping edge of the flexible display device 1 can be leveled and the product can be prevented from being crushed.

In order to further protect the flexible display device 1 during the leveling process, an elastic buffer layer is disposed on the lower surface of the leveling frame 332, and when the leveling component 33 is located at the leveling position, the hollowed-out area 331 corresponds to the main body area 121, and the elastic buffer layer is in mechanical contact with the peripheral area 122. The elastic buffer is at least partly made of a soft and/or elastic material, which allows the elastic buffer to prevent crushing of the flexible display device 1 by elastic deformation after being pressed when the elastic buffer is in contact with the flexible display device 1. For example, the elastomeric buffer layer may be made of at least one of teflon, silicone, plastic, and rubber materials, or may be of any construction and/or material so long as the elastomeric buffer layer performs the functions described herein.

In order to prevent the flexible display device 1 placed on the bonding stage 31 from being shifted to reduce alignment accuracy, a vacuum suction region in which the flexible display device 1 is placed is arranged on the bonding stage 31. After the leveling frame 332 of the leveling component 33 is in good contact with the flexible display device 1, the four corners and the edge of the flexible display device 1 are flattened, which are originally warped due to the internal stress, and the whole flexible display device 1 is firmly adsorbed on the attaching platform, so that the flexible display device 1 can be prevented from moving in the following film attaching process, and the film alignment and attaching precision is improved.

When four corners and edges of the flexible display device 1 are leveled, the flexible display device 1 is further required to be aligned, in the non-limiting embodiment shown in fig. 7, an alignment module 35 is disposed above the flexible display device 1, the alignment module 35 includes a plurality of alignment cameras 351 capable of controllably lifting along a vertical direction, at least three non-coplanar marking points 123 are disposed at the edges of the flexible display device 1, after the warped edges of the flexible display device 1 are leveled, each alignment camera 351 of the leveling component 33 acquires coordinate position information of each marking point 123 directly above a corresponding marking point 123, and feeds back the coordinate position information to the control system, and then the control system can control the alignment of the film 541 and the flexible display device 1 according to the coordinate position information.

Referring to fig. 10, the present embodiment also shows a film-attaching line 5 of a display device, including: film material loading guide 52, device loading guide 56, and film sticking guide 55. The film material feeding guide rail 52 extends in a straight line direction; the device feeding guide rail 56 is opposite to and parallel to the film feeding guide rail 52; the film pasting guide rail 55 is arranged between the film material feeding guide rail 52 and the device feeding guide rail 56, and the film pasting guide rail 55 is respectively butted with the film material feeding guide rail 52 and the device feeding guide rail 56.

A plurality of film carrying platforms 53 are transferred on the film material feeding guide rail 52 in a turnover manner, and a plurality of carrying platforms 57 are transferred on the device feeding guide rail 56 in a turnover manner; the film pasting mechanism 3 as described above is provided on the film pasting rail 55. In the preferred embodiment, the film laminating line 5 further includes a film laminating platform 51, and the film material feeding rail 52, the film laminating rail 55, and the device feeding rail 56 are uniformly disposed on the film laminating platform 51.

As a further improvement, a film feeding platform 54 is disposed upstream of the film feeding rail 52, and a film 541 to be bonded is supplied to the film feeding platform 54.

As a further improvement, a device buffer platform 58 is disposed upstream of the device feeding guide rail 56, and the flexible display device 1 from which the glass carrier 11 is peeled is buffered on the buffer platform 58. The specific working flow is as follows:

the film 541 on the film material feeding platform 54 is transferred onto the film carrying platform 53 at the first feeding station 521 by a manipulator or a worker, the film carrying platform 53 transports the film 541 toward the film attaching guide rail 55 along the film material feeding guide rail 52, and simultaneously the flexible display device 1 on the device buffering platform 58 is transferred onto the carrying platform 57 at the second feeding station 561 by the manipulator 59 or the worker, and the flexible display device 1 is transported toward the film attaching guide rail 55 by the carrying platform 57 along the device feeding guide rail 56;

when the film 541 and the flexible display device 1 are transported to the film pasting guide rail 55, the flexible display device 1 may be transferred to the film pasting mechanism 3 by a manipulator for leveling and aligning, and then the film 541 is transferred to the film pasting mechanism 3 for performing the pasting process.

Example 2

Referring to fig. 6 to 9, fig. 7 is a structural diagram of a film sticking mechanism provided in embodiment 2 of the present invention;

fig. 8 is a block diagram showing a leveling component 43 in the film sticking mechanism according to embodiment 2 of the present invention; fig. 9 is a structural view of a nozzle in a film sticking mechanism provided in embodiment 2 of the present invention. Fig. 1 shows a schematic diagram of a laminated structure of a flexible display device 1 in the prior art, in which an OLED light emitting layer 13, a film packaging layer 14, a barrier layer 15, and a polarizing layer 16 are sequentially stacked on an upper surface of a flexible substrate 12 in the flexible display device 1 from bottom to top, wherein a flip chip film 17 is bonded to a peripheral edge of the OLED light emitting layer 13, a printed circuit board 18 is bonded to a part of the flip chip film 17, a glass carrier 11 is attached to a lower surface of the flexible substrate 12, after the glass carrier 11 is subjected to pretreatment such as cleaning, the interface between the flexible substrate 12 and the glass carrier 11 of the flexible display device 1 is irradiated with a focused laser beam, si-O bonds and van der waals forces of the interface are broken and eliminated, so that the flexible substrate 12 and the glass carrier 11 are smoothly separated, and then post-processing such as Delami (separation), ash detection, and BP film (supporting film) attachment are performed.

The film pasting mechanism 4 provided in this embodiment is capable of flattening the edge warpage portion of the flexible display device 1 before pasting the film, so as to overcome the problem that the alignment of the flexible display device 1 is affected by warpage. The film sticking mechanism 4 of the flexible display device provided in the present embodiment includes: bonding stage 41, lifting assembly 42, leveling assembly 43, and film roll 44. The flexible display device 1 is placed on the attaching platform 41; the lifting assembly 42 is erected above the attaching platform 41; the leveling component 43 is in transmission connection with the lifting component 42 and is positioned right above the flexible display device 1; the film laminating roller 44 is provided beside the laminating table 41.

The leveling component 43 is driven by the lifting component 42 to be reciprocally switched between an initial position and a leveling position along the vertical direction; when the leveling assembly 43 is in the leveling position, the leveling assembly 43 is in mechanical or fluid contact with the edge of the flexible display device 1 to level the warped edge of the flexible display device 1, and when the leveling assembly 43 is reset to the initial position, the film roll 44 roll-bonds the film 541 to the flexible substrate 12 of the flexible display device 1. In this embodiment, the initial position is located directly above the leveling position; the leveling position is slightly higher than the flexible display device 1, and the leveling position may be equal to the upper surface of the flexible display device 1 or slightly lower than the upper surface of the flexible display device 1.

In the embodiment shown in fig. 7, the lifting assembly 42 includes: at least two fixedly arranged lift drives 421 and at least two vacuum chucks 422. Each vacuum chuck 422 is in transmission connection with a corresponding one of the lift drivers 421; wherein, after the vacuum chuck 422 sucks the leveling component 43, the lifting driver 421 drives the vacuum chuck 422 to drive the leveling component 43 to lift reciprocally along the vertical direction so as to approach or separate from the flexible display device 1 below.

Referring to fig. 8, fig. 8 is a block diagram of a leveling assembly 43 in a film pasting mechanism 4 provided in embodiment 1 of the present invention, in the embodiment shown in fig. 8, the leveling position is slightly higher than the upper surface of the flexible display device 1, the edge of the lower surface of the leveling assembly 43 is provided with a plurality of nozzles 431 facing the flexible display device 1, when the leveling assembly 43 is located at the leveling position, the nozzles 431 are aligned with the edge of the flexible display device 1, and the air flow 432 sprayed by the nozzles 431 is in fluid contact with the edge of the flexible display device 1, so that the air flow 432 sprayed by the nozzles 431 performs lamination leveling on the edge tilting area of the flexible display device 1, thereby facilitating the subsequent film pasting process on the flexible display device 1.

Specifically, the distance between the flattening position and the flexible display device 1 is not smaller than the height dimension of the nozzle 431. Referring to fig. 10, in order to maximize the acting area of the ejected air flow on the flexible display device 1, the air flow ejected from the nozzle 431 has a conical structure that gradually spreads from top to bottom.

In order to prevent the flexible display device 1 placed on the bonding stage 41 from being shifted to reduce alignment accuracy, a vacuum suction region in which the flexible display device 1 is placed is arranged on the bonding stage 41. The air flow 432 sprayed out of the nozzle 431 of the leveling component 43 is in fluid contact with the edge of the flexible display device 1, the four corners and the edge of the flexible display device 1 are flattened, and the whole flexible display device 1 is firmly adsorbed on the lamination platform, so that the flexible display device 1 can be prevented from moving in the following lamination process, and the alignment and lamination precision of the film are improved.

When the four corners and edges of the flexible display device 1 are flattened, the flexible display device 1 is further aligned, and this mechanism can refer to the embodiment shown in fig. 7 of embodiment 1, which is not described herein.

Referring to fig. 10, the present embodiment also shows a film-attaching line 5 of a display device, including: film material loading guide 52, device loading guide 56, and film sticking guide 55. The film material feeding guide rail 52 extends in a straight line direction; the device feeding guide rail 56 is opposite to and parallel to the film feeding guide rail 52; the film pasting guide rail 55 is arranged between the film material feeding guide rail 52 and the device feeding guide rail 56, and the film pasting guide rail 55 is respectively butted with the film material feeding guide rail 52 and the device feeding guide rail 56.

A plurality of film carrying platforms 53 are transferred on the film material feeding guide rail 52 in a turnover manner, and a plurality of carrying platforms 57 are transferred on the device feeding guide rail 56 in a turnover manner; the film pasting mechanism 4 described above is provided on the film pasting rail 55.

As a further improvement, a film feeding platform 54 is disposed upstream of the film feeding rail 52, and a film 541 to be bonded is supplied to the film feeding platform 54.

As a further improvement, a device buffer platform 58 is disposed upstream of the device feeding guide rail 56, and the flexible display device 1 from which the glass carrier 11 is peeled is buffered on the buffer platform 58. The specific working flow is as follows:

the film 541 on the film material feeding platform 54 is transferred onto the film carrying platform 53 at the first feeding station 521 by a manipulator or a worker, the film carrying platform 53 transports the film 541 toward the film attaching guide rail 55 along the film material feeding guide rail 52, and simultaneously the flexible display device 1 on the device buffering platform 58 is transferred onto the carrying platform 57 at the second feeding station 561 by the manipulator 59 or the worker, and the flexible display device 1 is transported toward the film attaching guide rail 55 by the carrying platform 57 along the device feeding guide rail 56;

when the film 541 and the flexible display device 1 are transported to the film pasting guide rail 55, the flexible display device 1 may be transferred to the film pasting mechanism 4 by a manipulator for leveling and aligning, and then the film 541 is transferred to the film pasting mechanism 4 for performing the pasting process.

Example 3

According to the film pasting method for the display device, the edge warping portion of the flexible display device can be flattened before film pasting, so that the problem that alignment of the flexible display device 1 is affected due to warping is solved. The film pasting method provided by the embodiment comprises the following steps:

s100: providing a display device to be bonded of the peeled carrier substrate;

s200: vacuum adsorption is carried out on the display device to be laminated by utilizing a lamination platform;

s300: mechanically or fluidly contacting the edge of the display device to be attached by using a leveling assembly to level the edge of the display device to be attached;

s400: covering a film to be attached on the flattened display device;

s500: the film is roll laminated to a flexible substrate of a display device.

According to the embodiment of the invention, the pasting platform is utilized to carry out vacuum absorption on the region which is subjected to the leveling treatment in the display device to be pasted.

Specifically, the film pasting method comprises the following steps:

performing a substrate peeling operation on the flexible display device 1 to be bonded to peel the glass carrier plate 11 of the flexible display device 1 from the flexible substrate 12;

transferring the display device 1 from which the glass carrier plate 11 is peeled off onto a bonding stage;

the lifting assembly drives the leveling assembly to a leveling position directly above the display device 1, the leveling assembly being in mechanical or fluid contact with an edge of the flexible display device 1 to level the warped edge of the display device 1;

removing the leveling component and covering the display device 1 after leveling with a film 541 to be attached;

the film 541 is roll-bonded to the flexible substrate 12 of the display device 1.

As a further improvement, a vacuum suction area is arranged on the bonding stage, and the display device 1 from which the glass carrier plate 11 is peeled is transferred into the bonding stage vacuum suction area.

As a further improvement, the vacuum suction area will be sucked in position with the flattened warped edge and (other parts of) the flexible display device.

As a further improvement, at least three non-coplanar marking points 123 are provided at the edge of the flexible display device 1, and an alignment step is provided after the step of flattening the warped edge of the display device 1 and before the step of attaching the film:

the alignment module 35 acquires the coordinate position information of each marking point 123 right above each marking point 123;

the acquired coordinate position information is fed back to the control system, which controls the alignment of the film 541 with the display device 1, based on the coordinate position information.

The film pasting mechanism, the film pasting production line and the film pasting method of the flexible display device provided by the embodiment of the invention are described in detail, and specific examples are applied to explain the principle and the implementation mode of the invention, and the description of the above embodiments is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. A film sticking mechanism of a display device, comprising:

the attaching platform is used for bearing the display device to be attached;

the lifting assembly is erected above the attaching platform;

the leveling component is in transmission connection with the lifting component and is arranged opposite to the attaching platform; and

the film sticking roller is arranged at one side edge of the sticking platform;

the leveling assembly is driven by the lifting assembly to be switched back and forth between an initial position and a leveling position along the vertical direction; the leveling assembly is in mechanical or fluid contact with an edge of the display device to be laminated when the leveling assembly is in the leveling position.

2. The film attachment mechanism of claim 1, wherein the film attachment roller attaches the film to be attached to the flexible substrate of the display device when the leveling assembly is reset to the initial position.

3. The film attachment mechanism of claim 1, wherein the display device to be attached comprises a body region and a peripheral region disposed around the body region;

the leveling component is a frame-shaped structure with a hollowed-out area, when the leveling component is positioned at the leveling position, the hollowed-out area corresponds to the main body area, and the frame-shaped structure is in mechanical contact or fluid contact with the peripheral area.

4. A film attachment mechanism according to claim 3, wherein an elastic buffer layer is provided on a lower surface of the frame structure, and the hollowed-out area corresponds to the main body area when the leveling component is located at the leveling position, and the elastic buffer layer is in mechanical contact with the peripheral area.

5. A film laminating mechanism as recited in claim 3, wherein a plurality of nozzles are disposed on a lower surface of said frame-shaped structure, said hollowed-out area corresponds to said main body area when said leveling assembly is in said leveling position, said plurality of nozzles face said display device to be laminated, and air streams ejected from said plurality of nozzles are in fluid contact with said peripheral area.

6. The film attachment mechanism of claim 5, wherein the cross-sectional area of the air flow emitted from the nozzle increases gradually in a direction toward the attachment platform.

7. A film attachment mechanism as claimed in any one of claims 1 to 6, wherein a vacuum suction area is arranged on the attachment platform, the vacuum suction area being for vacuum-sucking the display device to be attached.

8. A film-attaching production line of a display device, comprising:

the film material feeding guide rail extends along a first direction, and a plurality of film carrying platforms are transferred to the film material feeding guide rail in a turnover manner;

the device feeding guide rail is opposite to the film material feeding guide rail and is arranged in parallel, and a plurality of material carrying platforms are transferred to the device feeding guide rail in a turnover manner;

the film pasting guide rail is arranged between the film material feeding guide rail and the device feeding guide rail and is respectively butted with the film material feeding guide rail and the device feeding guide rail;

wherein the film pasting guide rail is provided with the film pasting mechanism as claimed in any one of claims 1 to 7.

9. A method of laminating a display device, comprising the steps of:

providing a display device to be bonded of the peeled carrier substrate;

vacuum adsorption is carried out on the display device to be laminated by utilizing a lamination platform;

mechanically or fluidly contacting the edge of the display device to be attached by using a leveling assembly to level the edge of the display device to be attached;

covering a film to be attached on the flattened display device;

the film is roll laminated to a flexible substrate of a display device.

10. The method of pasting film of claim 9, wherein vacuum adsorption is performed on the flattened area of the display device to be pasted by using the pasting platform.