CN109178516B - Back film removing method and device and display device - Google Patents
Back film removing method and device and display device Download PDFInfo
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- CN109178516B CN109178516B CN201810824517.0A CN201810824517A CN109178516B CN 109178516 B CN109178516 B CN 109178516B CN 201810824517 A CN201810824517 A CN 201810824517A CN 109178516 B CN109178516 B CN 109178516B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
Abstract
The invention discloses a method and a device for removing a back film and a display device, and belongs to the technical field of display. The method comprises the following steps: attaching a protective film on the non-display surface of the display panel by adopting ultraviolet curing glue; curing the display panel attached with the protective film to enable the ultraviolet curing adhesive in the area to be bent of the display panel to be in a non-curing state, enable the ultraviolet curing adhesive in the area to be cured to be in a curing state, and enable the area to be cured to be an area on the display panel except the area to be bent; and stripping the protective film of the region to be bent. The method solves the problem of poor effect of the method for removing the back membrane in the related art, and improves the effect of removing the back membrane. The invention is used for locally removing the protective film on the back surface of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method and a device for removing a back film and a display device.
Background
With the development of display technologies, display devices are gradually developed to full screen and narrow frame. At present, the frame of the display device is reduced mainly by adopting a lead Bending (English: Pad Bending) mode so as to realize the narrow frame of the display device.
The display device comprises a display panel, the display panel is provided with a display surface and a non-display surface which are oppositely arranged, the display surface displays images, the non-display surface does not display images, and when Pad bundling is carried out, a Pad area of the display panel can be bent to the non-display surface of the display panel, so that the width of a non-display area of the display panel is reduced, and a frame of the display device is reduced. At present, a protective film is generally attached to the non-display surface of the display panel, and in order to avoid the influence of stress generated in the Bending process on the lead wires in the Pad area, the protective film in the area to be bent of the display panel needs to be removed before Pad bonding. In the related art, the protective film in the region to be bent of the display panel is usually burned by laser, so that the protective film in the region to be bent is decomposed by heat and removed. The non-display surface of the display panel is also called as the back surface of the display panel, the protective film attached to the non-display surface of the display panel is also called as a back film, and the region to be bent is located in the Pad region.
However, the laser burning process may damage the display panel, and may cause non-uniform residue of the adhesive for attaching the back film, thereby causing non-uniform stress generated in the bending process, and thus the above method for removing the back film is not effective.
Disclosure of Invention
The invention provides a method and a device for removing a back film and a display device, which can solve the problem of poor effect of the method for removing the back film in the related art. The technical scheme of the invention is as follows:
in a first aspect, a method for removing a back film is provided, the method comprising:
attaching a protective film on the non-display surface of the display panel by adopting ultraviolet curing glue;
curing the display panel attached with the protective film to enable the ultraviolet curing adhesive in the area to be bent of the display panel to be in a non-curing state, and enable the ultraviolet curing adhesive in the area to be cured to be in a curing state, wherein the area to be cured is an area on the display panel except the area to be bent;
and stripping the protective film of the region to be bent.
Optionally, curing the display panel to which the protection film is attached to make the uv-curable adhesive in the region to be bent of the display panel in a non-cured state and the uv-curable adhesive in the region to be cured in a cured state includes:
forming a light shielding layer in a corresponding area of the to-be-bent area on the protective film;
and irradiating the display panel with the shading layer by adopting ultraviolet light to ensure that the ultraviolet light curing glue in the area to be bent is in a non-curing state and the ultraviolet light curing glue in the area to be cured is in a curing state.
Optionally, forming a light shielding layer in a corresponding region of the region to be bent on the protective film includes:
and attaching a shading film to the corresponding area of the area to be bent on the protective film.
Optionally, attaching a light shielding film to a corresponding region of the region to be bent on the protection film, including:
aligning a light shielding film with a display panel attached with the protective film, and enabling an orthographic projection area of the light shielding film on the protective film to be superposed with a corresponding area of the area to be bent on the protective film;
and applying pressure to the light shielding film to enable the light shielding film to be attached to the corresponding area of the area to be bent on the protective film.
Optionally, curing the display panel to which the protection film is attached to make the uv-curable adhesive in the region to be bent of the display panel in a non-cured state and the uv-curable adhesive in the region to be cured in a cured state includes:
arranging a mask plate on one side of the display panel, which is attached with the protective film, so that a shading area of the mask plate is aligned with the area to be bent, and a light transmission area is aligned with the area to be cured;
and irradiating the display panel by adopting ultraviolet light through the mask plate, so that the ultraviolet light curing glue in the area to be bent is in a non-curing state, and the ultraviolet light curing glue in the area to be cured is in a curing state.
Optionally, after peeling off the protective film of the region to be bent, the method further includes: and cleaning the region to be bent by adopting plasma.
Optionally, the display panel is a display motherboard or a single display panel, and the display motherboard includes a plurality of display panels arranged in an array.
Optionally, the display panel is a display mother board, the display mother board includes a plurality of display panels arranged in an array, each display panel has a region to be bent,
before peeling off the protective film of the region to be bent, the method further comprises the following steps:
cutting the display mother board to obtain a plurality of display panels;
the stripping of the protective film of the region to be bent comprises the following steps: and stripping the protective film of the region to be bent of each display panel in the plurality of display panels at the module section.
Optionally, the peeling the protective film of the region to be bent includes:
cutting the protective film along the boundary line of the region to be bent;
and stripping the protective film of the region to be bent.
In a second aspect, there is provided a device for removing a back film, comprising:
the attaching module is used for attaching a protective film on the non-display surface of the display panel by adopting ultraviolet curing glue;
the curing module is used for curing the display panel attached with the protective film, so that the ultraviolet curing adhesive of the area to be bent of the display panel is in a non-curing state, the ultraviolet curing adhesive of the area to be cured is in a curing state, and the area to be cured is an area on the display panel except the area to be bent;
and the stripping module is used for stripping the protective film of the region to be bent.
Optionally, the curing module comprises:
the shading unit is used for forming a shading layer in a corresponding area of the area to be bent on the protective film;
and the irradiation unit is used for irradiating the display panel with the light shielding layer by adopting ultraviolet light to ensure that the ultraviolet light curing glue in the area to be bent is in a non-curing state and the ultraviolet light curing glue in the area to be cured is in a curing state.
Optionally, the light shielding unit is configured to attach a light shielding film to a corresponding region of the region to be bent on the protection film.
Optionally, the light shielding unit is configured to:
aligning a light shielding film with a display panel attached with the protective film, and enabling an orthographic projection area of the light shielding film on the protective film to be superposed with a corresponding area of the area to be bent on the protective film;
and applying pressure to the light shielding film to enable the light shielding film to be attached to the corresponding area of the area to be bent on the protective film.
Optionally, the curing module is configured to:
arranging a mask plate on one side of the display panel, which is attached with the protective film, so that a shading area of the mask plate is aligned with the area to be bent, and a light transmission area is aligned with the area to be cured;
and irradiating the display panel by adopting ultraviolet light through the mask plate, so that the ultraviolet light curing glue in the area to be bent is in a non-curing state, and the ultraviolet light curing glue in the area to be cured is in a curing state.
Optionally, the back membrane removing device further comprises:
and the cleaning module is used for cleaning the region to be bent by adopting plasma after the protective film of the region to be bent is stripped.
Optionally, the display panel is a display motherboard or a single display panel, and the display motherboard includes a plurality of display panels arranged in an array.
Optionally, the display panel is a display mother board, the display mother board includes a plurality of display panels arranged in an array, each display panel has a region to be bent, and the device for removing a back film further includes:
the cutting module is used for cutting the display mother board to obtain a plurality of display panels before the protective film of the region to be bent is peeled;
the stripping module is used for stripping the protective film of the region to be bent of each display panel in the plurality of display panels at the module section.
Optionally, the peeling module is configured to:
cutting the protective film along the boundary line of the region to be bent;
and stripping the protective film of the region to be bent.
In a third aspect, a display device is provided, where the display device includes a display panel, a protective film is attached to a non-display surface of the display panel, the display panel has a region to be bent, a lead region of the display panel is bent to the non-display surface of the display panel along the region to be bent, and the protective film in the region to be bent is removed by using the method according to the first aspect or any optional manner of the first aspect.
The technical scheme provided by the invention has the beneficial effects that:
according to the method and the device for removing the back film and the display device, the ultraviolet curing adhesive is adopted to attach the protective film on the non-display surface of the display panel, and when the display panel attached with the protective film is cured, only the ultraviolet curing adhesive in the region to be cured is cured, but the ultraviolet curing adhesive in the region to be bent is not cured, so that the protective film in the region to be bent can be directly stripped, laser burning is not needed, the display panel is prevented from being damaged in the laser burning process, the residual quantity of the protective film attaching adhesive in the region to be bent is uniform, and the stress in the bending process is uniform, so that the effect of the method for removing the back film is better.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart of a method for removing a back film according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for removing a back film according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a display panel according to an embodiment of the present invention after a protective film is attached to a non-display surface of the display panel;
fig. 4 is a flowchart of a method for curing a display panel with a protective film attached thereon according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating a light shielding film attached to a corresponding region of a region to be bent on a protection film according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a light shielding film attached to a corresponding region of a protection film at a region to be bent according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating a light shielding film attached to a corresponding region of a protection film in a region to be bent of a display mother board according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating a light shielding film attached to a region of a display mother board to be bent on a corresponding region of a protection film according to an embodiment of the present invention;
fig. 9 is a schematic view of a display panel with a light-shielding layer formed thereon by ultraviolet light irradiation according to an embodiment of the present invention;
fig. 10 is a flowchart of another method for curing a display panel with a protective film attached thereon according to an embodiment of the present invention;
fig. 11 is a schematic view illustrating exposure of a display panel to which a protective film is attached according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a protective film peeling off a region to be bent according to an embodiment of the present invention;
fig. 13 is a schematic diagram illustrating a display panel after cleaning a region to be bent of the display panel according to an embodiment of the present invention;
fig. 14 is a block diagram of a back film removing apparatus according to an embodiment of the present invention;
FIG. 15 is a block diagram of a curing module provided by embodiments of the present invention;
FIG. 16 is a block diagram of another device for removing a backing film provided by an embodiment of the present invention;
fig. 17 is a block diagram of another device for removing a back film according to an embodiment of the present invention.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The display device includes a display Panel (english: Panel), a protective film is attached to a back surface of the display Panel, and the protective film attached to the back surface of the display Panel is also called a back film. At present, in order to realize a narrow frame of a display device, a Pad Bending mode is mainly adopted to bend a Pad area of a display panel to the back of the display panel, the Pad Bending has a high requirement on stress, and in order to avoid the influence of the stress generated in the Bending process on a Pad area lead, before the Pad Bending, a protective film in an area to be bent of the display panel needs to be removed, that is, the protective film on the display panel needs to be partially removed. Wherein, the region to be bent is positioned in the Pad region.
At present, the following two methods are mainly used to remove the protective film in the region to be bent of the display panel.
The first method comprises the following steps: the method comprises the steps of attaching a protective film to the back surface of a display mother board (the display mother board comprises a plurality of display panels arranged in an array), cutting the display mother board by adopting laser to obtain a plurality of display panels, and then stripping the protective film of a region to be bent of each display panel. In the method, in order to avoid damage to the lead of the region to be bent by a subsequent production line process, after the protective film of the region to be bent is peeled off, a protective film for protecting the region to be bent needs to be attached to the protective film on the back surface of each display panel.
The second method comprises the following steps: and in the module section, burning the protective film in the region to be bent of the display panel by adopting laser, so that the protective film in the region to be bent is heated, decomposed and removed.
However, the first method requires a protective film to be attached to the protective film on the back surface of each display panel after peeling off the protective film in the region to be bent, and thus the Tact time (english) of the first method is long. In the second method, the laser may damage the display panel and generate a large amount of particles (particles) during the process of removing the back film, and the residue of the adhesive on the back film is not uniform, thereby causing non-uniformity of stress generated during the bending process.
At present, it is also possible to attach a protective film to the back surface of each display panel in a region other than the region to be bent, instead of attaching a protective film to the region to be bent, and thereafter, cut the protective film at the edge of each display panel at a block section. However, this method requires high attachment accuracy of the back film, requires high attachment process, and is costly.
According to the method for removing the back film provided by the embodiment of the invention, the protective film is attached to the whole back surface of the display panel, and the protective film of the region to be bent of the display panel is peeled off from the module section, so that the method has low requirements on an attaching process and low cost, Tact time can be shortened, the display panel cannot be damaged in the back film removing process, and nonuniform back film attaching glue residue cannot be caused. The method for removing the back film provided by the embodiment of the present invention refers to the following embodiments.
Fig. 1 is a flowchart of a method for removing a back film according to an embodiment of the present invention. Referring to fig. 1, the method includes:
102, curing the display panel attached with the protective film to enable the ultraviolet curing adhesive in the region to be bent of the display panel to be in a non-curing state, enable the ultraviolet curing adhesive in the region to be cured to be in a curing state, and enable the region to be cured to be a region on the display panel except the region to be bent.
And 103, stripping the protective film of the region to be bent.
In summary, according to the method for removing the back film provided by the embodiment of the invention, because the ultraviolet curing adhesive is used for attaching the protective film on the non-display surface of the display panel, and when the display panel attached with the protective film is cured, only the ultraviolet curing adhesive in the region to be cured is cured, but the ultraviolet curing adhesive in the region to be bent is not cured, the protective film in the region to be bent can be directly peeled off without laser burning, so that the display panel is prevented from being damaged in the laser burning process, the residual quantity of the protective film attaching adhesive in the region to be bent is uniform, and the stress in the bending process is uniform, so that the effect of the method for removing the back film is better.
Optionally, the display panel attached with the protection film is cured, so that the ultraviolet curing glue in the region to be bent of the display panel is in a non-cured state, and the ultraviolet curing glue in the region to be cured is in a cured state, including:
forming a light shielding layer in a corresponding area on the protective film in the area to be bent;
and irradiating the display panel with the shading layer by adopting ultraviolet light to ensure that the ultraviolet light curing adhesive in the area to be bent is in a non-curing state and the ultraviolet light curing adhesive in the area to be cured is in a curing state.
Optionally, forming a light shielding layer in a corresponding region on the protective film in the region to be bent includes:
and attaching a shading film to the corresponding region on the protection film in the region to be bent.
Optionally, attaching the light shielding film to a corresponding region on the protective film at the region to be bent, including:
aligning the shading film with the display panel attached with the protective film, and enabling an orthographic projection area of the shading film on the protective film to coincide with a corresponding area of the area to be bent on the protective film;
and applying pressure to the shading film to enable the shading film to be attached to the corresponding region of the region to be bent on the protection film.
Optionally, the display panel attached with the protection film is cured, so that the ultraviolet curing glue in the region to be bent of the display panel is in a non-cured state, and the ultraviolet curing glue in the region to be cured is in a cured state, including:
arranging a mask plate on one side of the display panel, which is attached with the protective film, so that a shading area of the mask plate is aligned with an area to be bent, and a light transmitting area is aligned with an area to be cured;
and irradiating the display panel by adopting ultraviolet light through the mask plate, so that the ultraviolet light curing adhesive in the area to be bent is in a non-curing state, and the ultraviolet light curing adhesive in the area to be cured is in a curing state.
Optionally, after peeling the protective film of the region to be bent, the method further includes: and cleaning the region to be bent by adopting plasma.
Optionally, the display panel is a display motherboard or a single display panel, and the display motherboard includes a plurality of display panels arranged in an array.
Optionally, the display panel is a display mother board, the display mother board includes a plurality of display panels arranged in an array, each display panel has an area to be bent,
before peeling off the protective film of the region to be bent, the method further comprises the following steps:
cutting the display mother board to obtain a plurality of display panels;
the protection film of the region of waiting to bend of peeling off includes: and stripping the protective film of the region to be bent of each display panel in the plurality of display panels at the module section.
Optionally, peeling off the protective film of the region to be bent includes:
cutting the protective film along the boundary line of the region to be bent;
and stripping the protective film of the region to be bent.
All the above-mentioned optional technical solutions can be combined arbitrarily to form the optional embodiments of the present invention, and are not described herein again.
Fig. 2 is a flowchart of another method for removing a back film according to an embodiment of the present invention, where the method can be used to remove a protection film in a region to be bent on the back surface of a display panel. Referring to fig. 2, the method includes:
In the embodiment of the present invention, the display panel may be a single display panel or a display mother board, and the display mother board includes a plurality of display panels arranged in an array. The step 201 is described by taking a single display panel as an example. Fig. 3 is a schematic diagram of a display panel 101 according to an embodiment of the present invention after a protective film 103 is attached to a non-display surface (not shown in fig. 3), referring to fig. 3, the protective film 103 is attached to the non-display surface of the display panel 101 through an ultraviolet light curing adhesive 102, the display panel 101 includes a display surface and a non-display surface that are arranged opposite to each other, the display surface displays an image, the non-display surface does not display an image, and the non-display surface is also referred to as a back surface. The display panel 101 may be a flexible display panel, and a surface of the display panel 101, which is in contact with the ultraviolet curing adhesive 102, may be a Polyimide (PI) film surface.
In the embodiment of the invention, the protective film 103 may be attached on the non-display surface of the display panel 101 by a film attachment process. Alternatively, the non-display surface of the display panel 101 may be coated with the uv-curable adhesive 102, and then the protective film 103 may be aligned with the surface of the display panel 101 coated with the uv-curable adhesive 102, and an attaching force may be applied to the protective film 103 to attach the protective film 103 to the non-display surface of the display panel 101.
The display panel is provided with a Pad area, and the area to be bent can be located in the Pad area. In the embodiment of the present invention, the display panel to which the protective film is attached may be subjected to curing treatment by any one of the following two methods.
The first method is shown in fig. 4, which shows a flowchart of a method for performing a curing process on a display panel with a protective film attached thereto, the method including:
Wherein, the light shield layer can be the photomask, and it is also that to form the light shield layer in the region of waiting to bend corresponding region on the protective film: and attaching a shading film to the corresponding region on the protection film in the region to be bent.
Fig. 5 is a schematic diagram of a light shielding film 104 attached to a corresponding region on the protection film 103 in a region to be bent (not shown in fig. 5) according to an embodiment of the present invention, referring to fig. 5, the light shielding film 104 may be attached to the corresponding region on the protection film 103 in the region to be bent of the display panel 101 by a film attachment process, and in the implementation, the light shielding film 104 may be aligned with the display panel 101 to which the protection film 103 is attached, so that a normal projection region of the light shielding film 104 on the protection film 103 coincides with the corresponding region on the protection film 103 in the region to be bent, and then pressure is applied to the light shielding film 104, so that the light shielding film 104 is attached to the corresponding region on the protection film. As shown in fig. 6, which illustrates a schematic view of attaching a light shielding film 104 to a corresponding region on a protection film 103 in a region to be bent (not labeled in fig. 6), the light shielding film 104 may be carried on a substrate film (not shown in fig. 6), the light shielding film 104 has an alignment mark M1, the protection film 103 has an alignment mark M2, the light shielding film 104 can be aligned with the display panel 101 to which the protective film 103 is attached, based on the alignment mark M1 and the alignment mark M2, and after the light shielding film 104 is aligned with the display panel 101 to which the protective film 103 is attached, the orthographic projection area of the light shielding film 104 on the protective film 103 is overlapped with the corresponding area of the area to be bent on the protective film 103, then pressure is applied to the light shielding film 104, the light shielding film 104 is attached to the corresponding area of the area to be bent on the protective film 103, and finally the base material film layer of the light shielding film 104 is stripped, so that the attachment of the light shielding film 104 is completed.
It should be noted that, in fig. 5 and fig. 6, both the display panel is taken as an example of a single display panel, and in the embodiment of the present invention, a protective film may be attached on the display mother board, and a light shielding film may be attached on a corresponding region of the protective film in a region to be bent of the display mother board. Fig. 7 is a schematic view of a light shielding film attached to a corresponding region of a protection film at a region to be bent of a display mother board according to an embodiment of the present invention, and fig. 8 is a schematic view of a light shielding film attached to a corresponding region of a protection film at a region to be bent of a display mother board according to an embodiment of the present invention, where, with reference to fig. 7 and 8, the display mother board includes a plurality of display panels 101 arranged in an array, the plurality of display panels 101 are arranged in a plurality of rows, each display panel 101 has a region to be bent (not shown in fig. 7 and 8), all the regions to be bent of the display panels 101 constitute the region to be bent of the display mother board, a plurality of strip-shaped light shielding films 104 are supported on a same substrate film (not shown in fig. 7 and 8), and the substrate film has an alignment mark M1, the protection film 103 attached to the display mother board has an alignment mark M2, which can be aligned according to the alignment mark M1 and the alignment mark, aligning a base material film layer bearing the shading films 104 with a display mother board attached with a protection film 103, enabling an orthographic projection area of each shading film 104 in the shading films 104 on the protection film 103 to be superposed with a corresponding area of an area to be bent of one row of display panels 101 on the protection film 103, then applying pressure to the shading films 104 through the base material film layer to enable the shading films 104 to be attached on the corresponding areas of the area to be bent of the display mother board on the protection film 103, and finally peeling off the base material film layer, so that the attachment of the shading films 104 is completed. Alternatively, as shown in fig. 7, the substrate film layer and the protection film 103 are both rectangular structures, four corners of the substrate film layer are provided with alignment marks M1, and four corners of the protection film 103 are provided with alignment marks M2. In the embodiment of the invention, compared with the mode of attaching the light shielding film on a single display panel, the attaching process of attaching the light shielding film on the display mother board can be reduced, and Tact time is shortened.
It should be further noted that, in the embodiment of the present invention, the light shielding film is attached to the corresponding region of the to-be-bent region of the display panel on the protection film, and the light shielding film is taken as an example for explanation, in practical application, a light shielding material may be deposited on the display panel attached with the protection film, and then the light shielding material is processed through a composition process, so as to form the light shielding layer on the corresponding region of the to-be-bent region of the display panel on the protection film, which is not described herein again.
In the substep 2022a, the display panel formed with the light shielding layer is irradiated by ultraviolet light, so that the ultraviolet light curing adhesive in the region to be bent is in a non-cured state, and the ultraviolet light curing adhesive in the region to be cured is in a cured state.
Fig. 9 is a schematic view of a display panel 101 having a light-shielding layer formed thereon and irradiated with ultraviolet light according to an embodiment of the present invention, and fig. 9 illustrates the light-shielding layer as a light-shielding film 104. Referring to fig. 9, an ultraviolet light source (not shown in fig. 9) may be disposed on one side of the display panel 101 where the light shielding film 104 is attached, so that ultraviolet light emitted by the ultraviolet light source irradiates the display panel 101 where the light shielding film 104 is attached, the ultraviolet light irradiates an ultraviolet light curing adhesive 1021 in a region (not shown in fig. 9) to be cured of the display panel 101 through the protective film 103, and the ultraviolet light curing adhesive 1021 in the region to be cured of the display panel 101 is subjected to a curing reaction under the action of the ultraviolet light and finally is in a cured state; since the light shielding film 104 shields ultraviolet light, the ultraviolet light curing glue 1022 in the region (not shown in fig. 9) to be bent of the display panel 101 cannot be cured, and the ultraviolet light curing glue 1022 in the region to be bent is in an uncured state.
It should be noted that, in practical applications, ultraviolet light may also be adopted to irradiate the display motherboard on which the light shielding layer is formed, so that the ultraviolet light curing adhesive in the region to be bent of the display motherboard is in a non-cured state, and the ultraviolet light curing adhesive in the region to be cured of the display motherboard is in a cured state, and the implementation process may refer to fig. 9, which is not described herein again in the embodiment of the present invention.
The second method is shown in fig. 10, which shows a flowchart of another method for curing a display panel with a protective film attached thereon according to an embodiment of the present invention, and the method includes:
in the substep 2021b, a mask is disposed on the side of the display panel to which the protective film is attached, such that the light-shielding region of the mask is aligned with the region to be bent, and the light-transmitting region is aligned with the region to be cured.
As shown in fig. 11, which illustrates a schematic view of exposing the display panel 101 attached with the protective film 103 according to an embodiment of the present invention, a mask plate 30 may be disposed above a side of the display panel 101 where the protective film 103 is formed, so that the mask plate 30 is aligned with the display panel 101, a light-shielding region 301 of the mask plate 30 is aligned with a region (not marked in fig. 11) of the display panel 101 to be bent, a light-transmitting region 302 of the mask plate 30 is aligned with a region (not marked in fig. 11) of the display panel 101 to be cured, and then the mask plate 30 is fixed by using a fixing frame (not shown in fig. 11).
And the substep 2022b, irradiating the display panel by ultraviolet light through the mask plate to enable the ultraviolet curing glue in the region to be bent to be in a non-curing state and enable the ultraviolet curing glue in the region to be cured to be in a curing state.
As shown in fig. 11, an ultraviolet light source (not shown in fig. 11) may be disposed above the mask plate 30, so that ultraviolet light emitted by the ultraviolet light source irradiates the display panel 101 attached with the light shielding film 104 through the mask plate 30, the ultraviolet light sequentially penetrates through the light transmitting area 302 of the mask plate 30 and the protective film 103 to irradiate on the ultraviolet curing glue 1021 in the area (not shown in fig. 11) to be cured of the display panel 101, and the ultraviolet curing glue 1021 in the area to be cured of the display panel 101 is subjected to a curing reaction under the action of the ultraviolet light and is finally in a cured state; since the light-shielding region 301 of the mask plate 30 shields the ultraviolet light, the ultraviolet curing glue 1022 in the region (not shown in fig. 11) to be bent of the display panel 101 cannot be cured, and the ultraviolet curing glue 1022 in the region to be bent is in a non-cured state.
It should be noted that, the second method is described by taking a single display panel as an example, in practical applications, the second method may also be executed on a display motherboard to which a protection film is attached, and the implementation process may refer to this embodiment, which is not described herein again. It should also be noted that, in practice, the second method may be carried out in an exposure machine.
And step 203, stripping the protective film of the region to be bent.
Since the uv curable adhesive of the region to be bent of the display panel is not cured in step 202, the protective film of the region to be bent of the display panel may be peeled off. Before the protective film in the region to be bent is peeled, the protective film may be cut along the boundary line of the region to be bent, and then the protective film in the region to be bent may be peeled. Optionally, the protective film may be cut along a boundary line of the region to be bent by using laser, and the protective film may be cut after the display panel to which the protective film is attached is cured, or the protective film may be cut in a module segment, which is not limited in the embodiment of the present invention.
As shown in fig. 12, which illustrates a schematic diagram of peeling off the protective film 103 in the region to be bent according to an embodiment of the present invention, after the protective film 103 is cut along the boundary line of the region to be bent, the protective film 103 in the region to be bent (not labeled in fig. 12) of the display panel 101 may be peeled off by using a peeling tool 20, and the ultraviolet light curing glue 1022 in the region to be bent and the light shielding layer 104 on the protective film 103 in the region to be bent are peeled off while the protective film 103 in the region to be bent of the display panel 101 is peeled off. Among them, the peeling tool 20 may be a peeling blade or the like. In fig. 12, an example of shielding ultraviolet light by attaching the light shielding film 104 to the protective film 103 is described, and when the protective film 103 in the region to be bent of the display panel 101 is shielded by a mask, the protective film 103 in the region to be bent of the display panel 101 is peeled off and the ultraviolet curing glue 1022 in the region to be bent is peeled off.
Optionally, the protective film of the region to be bent of the display panel may be peeled off at the module section, that is, when the display panel is bent, the protective film of the region to be bent of the display panel is peeled off first, and then the display panel is bent, so that the lead of the region to be bent of the display panel is prevented from being damaged by a production line process after the ultraviolet curing adhesive is cured. In addition, in practical applications, when the above steps 201 and 202 are performed on the display mother board, before the step 203, the display mother board may be cut to obtain a plurality of display panels, and then the protective film of the region to be bent of each of the plurality of display panels may be peeled off.
And step 204, cleaning the region to be bent by adopting plasma.
Fig. 13 is a schematic diagram after cleaning a region (not shown in fig. 13) of the display panel 101 to be bent, where plasma may be used to bombard the region of the display panel 101 to be bent to remove the uv-curable adhesive remaining in the region to be bent, so as to clean the uv-curable adhesive remaining in the region to be bent. Since the region to be bent of the display panel 101 is dry after the plasma cleaning, the region to be bent is cleaned by using the plasma, and the lead of the region to be bent of the display panel 101 can be prevented from being damaged in the cleaning process.
In summary, according to the method for removing the back film provided by the embodiment of the invention, because the ultraviolet curing adhesive is used for attaching the protective film on the non-display surface of the display panel, and when the display panel attached with the protective film is cured, only the ultraviolet curing adhesive in the region to be cured is cured, but the ultraviolet curing adhesive in the region to be bent is not cured, the protective film in the region to be bent can be directly peeled off without laser burning, the display panel is prevented from being damaged in the laser burning process, the yield of products is improved, the residues of the protective film attaching adhesive in the region to be bent are uniform, and the stress in the bending process is uniform, so that the effect of the method for removing the back film is better.
When the method provided by the embodiment of the invention is used for removing the protective film of the region to be bent of the display panel, only the protective film needs to be stripped and the residual ultraviolet curing adhesive needs to be cleaned, and laser burning is not needed, so that the display panel is not damaged, and the yield of products is ensured. In addition, the method can also control the thickness of the ultraviolet light curing glue to enable the lead of the Pad area of the display panel to be positioned in the central layer, and the influence of the bending process on the lead of the Pad area of the display panel is reduced to the maximum extent. According to the embodiment of the invention, after the protective film of the region to be bent of the display panel is removed, the protective film is not required to be attached, so that the Tact time can be shortened, the production capacity of a production line is improved, and the protective film is attached to the whole back surface of the display panel and then is locally removed, so that the method has the advantages of low back film attachment precision, low requirements on an attachment process and low cost.
It should be noted that, the method for removing a back film provided in the embodiment of the present invention is described by taking a case of partially removing a protective film on the back surface of a display panel as an example, but the application of the present invention is not limited thereto, and the method for removing a back film provided in the embodiment of the present invention may be applied to any scene where a film layer needs to be partially removed, and details are not described herein.
The following is an embodiment of the present invention, which can be used to perform the method for removing the back film. For details that are not disclosed in the embodiments of the device for removing a back film of the present invention, please refer to the embodiments of the method for removing a back film of the present invention.
Fig. 14 is a block diagram of a device 40 for removing a back membrane according to an embodiment of the present invention, where the device 40 may be used to perform a method for removing a back membrane according to the embodiment shown in fig. 1 or fig. 2, and referring to fig. 14, the device 40 may include, but is not limited to:
the attaching module 401 is configured to attach a protective film to a non-display surface of the display panel by using an ultraviolet light curing adhesive;
the curing module 402 is configured to perform curing treatment on the display panel attached with the protective film, so that the ultraviolet curing adhesive in the region to be bent of the display panel is in a non-cured state, the ultraviolet curing adhesive in the region to be cured is in a cured state, and the region to be cured is a region on the display panel except for the region to be bent;
and a stripping module 403 for stripping the protective film of the region to be bent.
In summary, according to the device for removing the back film provided by the embodiment of the invention, the attaching module attaches the protective film on the non-display surface of the display panel by using the ultraviolet curing adhesive, and when the curing module cures the display panel attached with the protective film, only the ultraviolet curing adhesive in the region to be cured is cured, but the ultraviolet curing adhesive in the region to be bent is not cured, so that the peeling module can directly peel the protective film in the region to be bent without laser burning, the display panel is prevented from being damaged in the laser burning process, the residual of the protective film attaching adhesive in the region to be bent is uniform, and the stress in the bending process is uniform, and therefore, the device for removing the back film has a good effect.
Alternatively, as shown in fig. 15, a block diagram of a curing module 402 provided by an embodiment of the present invention is shown, where the curing module 402 includes:
a shading unit 4021 for forming a shading layer in a corresponding region on the protective film in a region to be bent;
the irradiation unit 4022 is configured to irradiate the display panel with the light shielding layer by using ultraviolet light, so that the ultraviolet light curing adhesive in the region to be bent is in a non-cured state, and the ultraviolet light curing adhesive in the region to be cured is in a cured state.
Optionally, a light shielding unit 4021 is used for attaching a light shielding film to a corresponding region on the protective film at the region to be bent.
Optionally, a shading unit 4021 for:
aligning the shading film with the display panel attached with the protective film, and enabling an orthographic projection area of the shading film on the protective film to coincide with a corresponding area of the area to be bent on the protective film;
and applying pressure to the shading film to enable the shading film to be attached to the corresponding region of the region to be bent on the protection film.
Optionally, a curing module 402 for:
arranging a mask plate on one side of the display panel, which is attached with the protective film, so that a shading area of the mask plate is aligned with an area to be bent, and a light transmitting area is aligned with an area to be cured;
and irradiating the display panel by adopting ultraviolet light through the mask plate, so that the ultraviolet light curing adhesive in the area to be bent is in a non-curing state, and the ultraviolet light curing adhesive in the area to be cured is in a curing state.
Alternatively, as shown in fig. 16, which shows a block diagram of another device 40 for removing a back membrane according to an embodiment of the present invention, on the basis of fig. 14, the device 40 further includes:
and a cleaning module 404, configured to clean the region to be bent with plasma after stripping the protective film of the region to be bent.
Optionally, the display panel is a display motherboard or a single display panel, and the display motherboard includes a plurality of display panels arranged in an array.
Optionally, the display panel is a display mother board, the display mother board includes a plurality of display panels arranged in an array, each display panel has an area to be bent,
as shown in fig. 17, which shows a block diagram of another device 40 for removing a back membrane according to an embodiment of the present invention, on the basis of fig. 16, the device 40 further includes:
a cutting module 405, configured to cut the display mother board to obtain a plurality of display panels before peeling off the protective film in the region to be bent;
and a stripping module 403 for stripping the protective film of the region to be bent of each of the plurality of display panels at the module section.
Optionally, a stripping module 403 for:
cutting the protective film along the boundary line of the region to be bent;
and stripping the protective film of the region to be bent.
In summary, according to the device for removing the back film provided by the embodiment of the invention, the attaching module attaches the protective film on the non-display surface of the display panel by using the ultraviolet curing adhesive, and when the curing module cures the display panel attached with the protective film, only the ultraviolet curing adhesive in the region to be cured is cured, but the ultraviolet curing adhesive in the region to be bent is not cured, so that the peeling module can directly peel the protective film in the region to be bent without laser burning, the display panel is prevented from being damaged in the laser burning process, the residual of the protective film attaching adhesive in the region to be bent is uniform, and the stress in the bending process is uniform, and therefore, the device for removing the back film has a good effect.
The embodiment of the invention also provides a display device, which comprises a display panel, wherein a protective film is attached to the non-display surface of the display panel, the display panel is provided with a region to be bent, the lead wire region of the display panel is bent to the non-display surface of the display panel along the region to be bent, and the protective film of the region to be bent is removed by adopting the method of the first aspect or any optional mode of the first aspect. The display device can be a flexible display device, and can be any product or component with a display function, such as a smart phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame or a navigator.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method of removing a backing film, the method comprising:
attaching a protective film on the non-display surface of the display panel by adopting ultraviolet curing glue;
curing the display panel attached with the protective film to enable the ultraviolet curing adhesive in the area to be bent of the display panel to be in a non-curing state, and enable the ultraviolet curing adhesive in the area to be cured to be in a curing state, wherein the area to be cured is an area on the display panel except the area to be bent;
and stripping the protective film of the region to be bent, wherein the protective film is cut along the boundary line of the region to be bent, and then the protective film of the region to be bent with the ultraviolet curing adhesive in a non-curing state is stripped.
2. The method of claim 1, wherein curing the display panel with the protective film attached thereon to make the uv-curable adhesive in the region to be bent of the display panel in a non-cured state and the uv-curable adhesive in the region to be cured in a cured state comprises:
forming a light shielding layer in a corresponding area of the to-be-bent area on the protective film;
and irradiating the display panel with the shading layer by adopting ultraviolet light to ensure that the ultraviolet light curing glue in the area to be bent is in a non-curing state and the ultraviolet light curing glue in the area to be cured is in a curing state.
3. The method according to claim 2, wherein forming a light shielding layer on the protective film at a corresponding region of the region to be bent includes:
and attaching a shading film to the corresponding area of the area to be bent on the protective film.
4. The method according to claim 3, wherein attaching a light shielding film to the region to be bent corresponding to the protective film comprises:
aligning a light shielding film with a display panel attached with the protective film, and enabling an orthographic projection area of the light shielding film on the protective film to be superposed with a corresponding area of the area to be bent on the protective film;
and applying pressure to the light shielding film to enable the light shielding film to be attached to the corresponding area of the area to be bent on the protective film.
5. The method of claim 1, wherein curing the display panel with the protective film attached thereon to make the uv-curable adhesive in the region to be bent of the display panel in a non-cured state and the uv-curable adhesive in the region to be cured in a cured state comprises:
arranging a mask plate on one side of the display panel, which is attached with the protective film, so that a shading area of the mask plate is aligned with the area to be bent, and a light transmission area is aligned with the area to be cured;
and irradiating the display panel by adopting ultraviolet light through the mask plate, so that the ultraviolet light curing glue in the area to be bent is in a non-curing state, and the ultraviolet light curing glue in the area to be cured is in a curing state.
6. The method of claim 1, wherein after peeling the protective film of the region to be bent, the method further comprises: and cleaning the region to be bent by adopting plasma.
7. The method according to any one of claims 1 to 6, wherein the display panel is a display mother board or a single display panel, and the display mother board comprises a plurality of display panels arranged in an array.
8. The method according to any one of claims 1 to 6, wherein the display panel is a display mother board including a plurality of display panels arranged in an array, each of the display panels having an area to be bent,
before peeling off the protective film of the region to be bent, the method further comprises the following steps:
cutting the display mother board to obtain a plurality of display panels;
the stripping of the protective film of the region to be bent comprises the following steps: and stripping the protective film of the region to be bent of each display panel in the plurality of display panels at the module section.
9. A device for removing a back film, comprising:
the attaching module is used for attaching a protective film on the non-display surface of the display panel by adopting ultraviolet curing glue;
the curing module is used for curing the display panel attached with the protective film, so that the ultraviolet curing adhesive of the area to be bent of the display panel is in a non-curing state, the ultraviolet curing adhesive of the area to be cured is in a curing state, and the area to be cured is an area on the display panel except the area to be bent;
and the peeling module is used for peeling the protective film of the region to be bent, wherein the protective film is cut along the boundary line of the region to be bent, and then the protective film of the region to be bent, in which the ultraviolet curing adhesive is in a non-curing state, is peeled.
10. A display device, comprising a display panel, wherein a protective film is attached to a non-display surface of the display panel, the display panel has a region to be bent, a lead region of the display panel is bent to the non-display surface of the display panel along the region to be bent, and the protective film in the region to be bent is removed by the method of any one of claims 1 to 8.
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| CN110444665A (en) * | 2019-08-15 | 2019-11-12 | 京东方科技集团股份有限公司 | A kind of flexible base board, its manufacturing method and display device |
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| KR101327901B1 (en) * | 2013-08-14 | 2013-11-13 | 삼우지앤티(주) | Coated glass manufacturing apparatus for display and the preparing method for the same |
| CN105244314A (en) * | 2015-10-08 | 2016-01-13 | 上海和辉光电有限公司 | Display device and preparation method thereof |
| CN105633281B (en) * | 2016-01-06 | 2018-07-17 | 京东方科技集团股份有限公司 | A kind of flexible display panels and its packaging method, display device |
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| CN106383555A (en) * | 2016-10-20 | 2017-02-08 | 成都京东方光电科技有限公司 | Flexible display panel, manufacturing method of flexible display panel, and display device |
| KR101854050B1 (en) * | 2016-12-01 | 2018-06-08 | 이근형 | Protective film for curved surface display panel and method of manufacturing thereof |
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| CN107195802B (en) * | 2017-06-05 | 2019-06-28 | 京东方科技集团股份有限公司 | A kind of flexible display apparatus and preparation method thereof |
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