CN111596786A - Display panel, display device and forming method thereof - Google Patents
Display panel, display device and forming method thereof Download PDFInfo
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- CN111596786A CN111596786A CN202010110947.3A CN202010110947A CN111596786A CN 111596786 A CN111596786 A CN 111596786A CN 202010110947 A CN202010110947 A CN 202010110947A CN 111596786 A CN111596786 A CN 111596786A
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- decomposable
- adhesive layer
- display panel
- array substrate
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000012790 adhesive layer Substances 0.000 claims abstract description 178
- 239000000463 material Substances 0.000 claims abstract description 91
- 239000003292 glue Substances 0.000 claims abstract description 66
- 239000010410 layer Substances 0.000 claims abstract description 62
- 230000003287 optical effect Effects 0.000 claims abstract description 52
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 238000005452 bending Methods 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000354 decomposition reaction Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000004513 sizing Methods 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 3
- 239000010408 film Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- AYNNSCRYTDRFCP-UHFFFAOYSA-N triazene Chemical compound NN=N AYNNSCRYTDRFCP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
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- General Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
Abstract
The embodiment of the invention provides a display panel, a display device and a forming method thereof, wherein the display panel is provided with a display area and a bending area which are distributed in sequence in a first direction, and the display panel comprises: an array substrate; the glue layer is arranged on the surface of the array substrate and comprises an optical glue layer arranged in the display area and a decomposable glue layer arranged in the bending area, the decomposable glue layer is formed by coating glue stock on the bending area, and the glue stock contains decomposable materials which can be decomposed when preset conditions are met; the cover plate covers one side of the adhesive layer, which is far away from the array substrate. The embodiment of the invention can solve the problem that the display panel has bubbles.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a display device and a forming method thereof.
Background
With the continuous update of display module technologies, small-sized panels are gradually developing towards light and thin, high screen occupation ratio, ultra-narrow frame and even frameless. A display panel of a conventional structure generally includes a display area and a non-display area located on a peripheral side of the display area, and the non-display area is used for arranging and binding a flexible circuit.
In order to further reduce the occupied area of the non-display area, the non-display area is usually designed to be bent, i.e. the non-display area is also a bent area of the display panel. In order to prevent the corrosion and other problems of the binding flexible circuit in the bending area, an adhesive layer is coated on the bending area. Due to the limitation of the coating process, the adhesive layer of the bending region may overflow to the display region, so that the adhesive of the bending region interferes with other layer structures of the display panel, and the cover plate cannot be completely attached due to the tilting of the other layer structures, so that the display panel generates bubbles.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a forming method thereof, and aims to solve the problem that bubbles exist in the display panel.
In one aspect, an embodiment of the present invention provides a display panel, where the display panel has a display area and a bending area that are sequentially distributed in a first direction, and the display panel includes: an array substrate; the glue layer is arranged on the surface of the array substrate and comprises an optical glue layer arranged in the display area and a decomposable glue layer arranged in the bending area, and the decomposable glue layer comprises a decomposable material which can be decomposed when a preset condition is met; the cover plate covers one side of the adhesive layer, which is far away from the array substrate.
According to an embodiment of an aspect of the invention, the decomposable material includes at least one of a photolyzable material, a pyrolyzable material, or a dissolvable material;
preferably, the preset condition is a lighting condition, and the decomposable material comprises a photolyzable material;
preferably, the decomposable material comprises a triazine-based polymer.
According to any of the preceding embodiments of one aspect of the invention,
the decomposable adhesive layer is positioned in the bending area;
preferably, the thickness of the decomposable adhesive layer is 80-120 μm;
preferably, the distance between the decomposable adhesive layer and the optical adhesive layer in the first direction is 150 to 250 μm.
According to one aspect of the present invention, the decomposable adhesive layer includes a first subsection located in the display area and a second subsection located in the bending area, the first subsection and the second subsection are successively distributed in the first direction, and a thickness of the first subsection is smaller than or equal to a thickness of the optical adhesive layer;
preferably, the thickness of the second subsection is 80 μm to 120 μm;
preferably, the thickness of the first subsection is less than or equal to 25 μm;
preferably, the distance between the first subsections and the optical adhesive layer in the first direction is 150-250 μm.
On the other hand, the embodiment of the invention also provides a display device, which comprises the display panel.
In another aspect, an embodiment of the present invention further provides a method for forming a display panel, where the display panel has a display area and a bending area that are sequentially distributed in a first direction, and the method includes:
coating a sizing material on the array substrate, wherein the sizing material comprises a decomposable material which can be decomposed when meeting preset conditions;
decomposing the decomposable material coated to the display area to form a decomposable adhesive layer;
coating an optical adhesive material on the array substrate to form an optical adhesive layer positioned in the display area;
and covering a cover plate on one side of the decomposable adhesive layer and the optical adhesive layer, which is far away from the array substrate, so as to form the display panel.
According to an embodiment of the invention, the predetermined condition is a light condition, the decomposable material comprises a photolyzable material, and the step of decomposing the decomposable material coated on the display area to form the decomposable adhesive layer comprises:
covering a first mask plate with a first opening on one side of the decomposable adhesive layer, which is far away from the array substrate, wherein the first opening is arranged corresponding to the decomposable material in the display area;
and irradiating the glue material by adopting decomposition light to decompose the decomposable material in the display area to form a decomposable glue layer.
According to one aspect of the present invention, after the step of decomposing the decomposable material coated on the display area to form the decomposable adhesive layer, the predetermined condition is a light condition, and the method further includes:
covering a second mask plate with a second opening on one side of the decomposable adhesive layer, which is far away from the array substrate, so that the decomposable adhesive layer is exposed from the second opening;
and irradiating the decomposable adhesive layer by using decomposed light so as to decompose at least part of the decomposable adhesive layer deviating from the side of the array substrate, so that the thickness of the decomposable adhesive layer is within a preset thickness range.
According to one aspect of the present invention, in any one of the preceding embodiments, the splitting light is pulsed laser light.
According to one aspect of any of the preceding embodiments of the invention, the wavelength of the decomposed light is greater than or equal to 400 nm; preferably, the wavelength of the decomposed light is 500nm to 550 nm.
In the display panel of the embodiment of the invention, the display panel comprises an array substrate, a glue layer and a cover plate. The glue layer is coated on the array substrate and comprises an optical glue layer positioned in the display area and a decomposable glue layer positioned in the bending area. Because the decomposable adhesive layer comprises the decomposable material which can be decomposed when the preset condition is met, the decomposable adhesive layer can be decomposed. In display panel's forming process, can decompose the resolvable glue film for in the display panel after the shaping, resolvable glue film setting range and thickness are within suitable scope, avoid resolvable glue film and display panel's other layer structures to take place the interference on the position, make the apron can laminate completely with the resolvable glue film, avoid display panel gassing.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view of FIG. 1 provided in accordance with another embodiment of the present invention;
fig. 4 is an exploded view of a display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for forming a display panel according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a method for forming a display panel according to another embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method for forming a display panel according to another embodiment of the present invention;
fig. 8a to 8h are process flow diagrams of a method for forming a display panel according to an embodiment of the invention.
Description of reference numerals:
100. an array substrate;
200. a glue layer; 210. an optical adhesive layer; 220. the glue layer can be decomposed; 221. a first section; 222. A second subsection;
300. a touch screen;
400. a polarizer;
500. a cover plate;
600. a first mask plate; 610. a first opening;
700. a second mask plate; 710. a second opening.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the 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 relative importance.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For better understanding of the present invention, the display panel, the display device and the forming method thereof according to the embodiment of the present invention are described in detail below with reference to fig. 1 to 8 h.
Fig. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention, and fig. 2 is a cross-sectional view of fig. 1.
According to the display panel of the first embodiment of the present invention shown in fig. 1 and 2, the display panel has a display area AA and a bending area PA which are successively distributed in a first direction, and the display panel includes: an array substrate 100; the adhesive layer 200 is disposed on the surface of the array substrate 100, the adhesive layer 200 includes an optical adhesive layer 210 disposed in the display area AA and a decomposable adhesive layer 220 disposed in the bending area PA, and the decomposable adhesive layer 220 includes a decomposable material capable of being decomposed when a preset condition is met; and the cover plate 500 covers one side of the adhesive layer 200 away from the array substrate 100.
In the display panel according to the first embodiment of the present invention, the display panel includes an array substrate 100, a glue layer 200, and a cover plate 500. The adhesive layer 200 is coated on the array substrate 100, and the adhesive layer 200 includes an optical adhesive layer 210 located in the display area AA and a decomposable adhesive layer 220 located in the bending area PA. Since the decomposable adhesive layer 220 includes a decomposable material that can be decomposed when a predetermined condition is satisfied, the decomposable adhesive layer 220 can be decomposed. In display panel's forming process, can decompose resolvable glue layer 220 for in the display panel after the shaping, resolvable glue layer 220 setting range and thickness are within suitable scope, avoid resolvable glue layer 220 and display panel's other layer structures to take place the interference on the position, make apron 500 can laminate completely with resolvable glue layer 220, avoid display panel consequently to produce the bubble.
In the embodiment of the present invention, the first direction may be arranged in a plurality of ways, and the display area AA and the bending area PA may be sequentially distributed along the first direction. For example, the first direction is the X direction shown in fig. 2. The thickness direction is a stacking direction of the array substrate 100, the adhesive layer 200, and the cover 500. For example, the thickness direction is the Z direction shown in fig. 2.
In some alternative embodiments, as shown in fig. 2, the decomposable adhesive layer 220 is located in the bending region PA. That is, the display area AA is not provided with the decomposable adhesive layer 210, so that the decomposable adhesive layer 210 can be prevented from interfering with other layer structures of the display panel in position.
For example, the display panel further includes a touch screen 300, the touch screen 300 is located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500, and since the decomposable adhesive layer 210 is located in the bending area PA, the touch screen 300 and the decomposable adhesive layer 220 are juxtaposed in the first direction. So that the touch screen 300 and the decomposable adhesive layer 220 are not interfered, and the touch screen 300 is prevented from tilting. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
Or, the display panel further includes a polarizer 400 located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500, and since the decomposable adhesive layer 220 is located in the bending area PA, the polarizer 400 and the decomposable adhesive layer 220 are distributed in parallel in the first direction. So that the positions of the polarizer 400 and the decomposable adhesive layer 220 do not interfere with each other, and the polarizer 400 is prevented from tilting. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
For another example, the display panel includes both the touch screen 300 and the polarizer 400, and the polarizer 400 is located on a side of the touch screen 300 facing away from the optical adhesive 210 layer. The touch screen 300, the polarizer 400 and the decomposable adhesive layer 220 are arranged in parallel in the first direction. The touch screen 300 and the polarizer 400 are prevented from being tilted. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
Alternatively, referring to fig. 3 and 4 together, fig. 3 is a cross-sectional view of fig. 1 according to another embodiment of the present invention. Fig. 4 is an exploded view of a display panel according to an embodiment of the present invention.
In other alternative embodiments, the decomposable adhesive layer 220 comprises a first subsection 221 located in the display area AA and a second subsection 222 located in the bending area PA, the first subsection 221 and the second subsection 222 are successively distributed in the first direction, and the thickness of the first subsection is less than or equal to that of the optical adhesive layer 210.
In these alternative embodiments, since the thickness of the first sub-portion 221 is less than or equal to the thickness of the optical adhesive layer 210, some layer structures disposed on the optical adhesive layer 210 do not positionally interfere with the decomposable adhesive layer 220, thereby not causing bubbles on the display panel.
For example, the display panel further includes a touch screen 300, the touch screen 300 is located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500, since the thickness of the first sub-portion 221 is less than or equal to the thickness of the optical adhesive layer 210, the touch screen 300 is located on a side of the first sub-portion 221 facing away from the array substrate 100, and the touch screen 300 and the second sub-portion 222 are juxtaposed in the first direction. So that the touch screen 300 and the decomposable adhesive layer 220 are not interfered, and the touch screen 300 is prevented from tilting. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
Or, the display panel further includes a polarizer 400 located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500, and since the thickness of the first sub-portion 221 is smaller than or equal to the thickness of the optical adhesive layer 210, the polarizer 400 is located on a side of the first sub-portion 221 facing away from the array substrate 100, and the polarizer 400 and the second sub-portion 222 are disposed in parallel in the first direction. So that the positions of the polarizer 400 and the decomposable adhesive layer 220 do not interfere with each other, and the polarizer 400 is prevented from tilting. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
For another example, the display panel includes both the touch screen 300 and the polarizer 400, and the polarizer 400 is located on a side of the touch screen 300 away from the optical adhesive layer 210. The touch screen 300 and the polarizer 400 are located at a side of the first sub-part 221 facing away from the array substrate 100, and the touch screen 300, the polarizer 400 and the second sub-part 222 are juxtaposed in the first direction. The touch screen 300 and the polarizer 400 are prevented from being tilted. Thereby further avoiding the problem of bubbles generated by the incomplete attachment of the cover plate 500.
The material of the optical adhesive layer 210 can be disposed in various ways, for example, the material of the optical adhesive layer 210 includes epoxy resin. The light transmittance of the optical adhesive layer 210 is, for example, greater than or equal to 50%, and preferably, the light transmittance of the optical adhesive layer 210 is greater than or equal to 85%, so that the optical adhesive layer 210 does not affect the normal display of the display panel. The thickness of the optical glue layer 210 is, for example, less than or equal to 25 μm. At this time, the thickness of the first sub-portion 221 is less than or equal to the thickness of the optical adhesive layer 10, and the thickness of the second sub-portion 222 is less than or equal to 25 μm.
There are various ways to arrange the decomposable adhesive layer 220, for example, the decomposable adhesive layer 220 is formed by coating an adhesive on the array substrate 100. The coating comprises a decomposable material.
The decomposable material can be disposed in various ways, for example, in some alternative embodiments, the decomposable material can include, for example, a photolyzable material, and the decomposable layer 220 can be decomposed by irradiating the decomposable layer 220 with a decomposing light. Photolyzable materials include, for example, photolyzable substances, such as triazene-based polymers, that can be decomposed when exposed to light.
The size, for example, further includes a resin in which the photolyzable material is mixed so that the coating can form a thin film when applied to the array substrate 100. The resin includes, for example, a diaminodiphenyl compound and a diamine, and the triazine-based polymer is mixed in the diaminodiphenyl compound and the diamine to obtain a colloidal substance, and the colloidal substance is coated on the array substrate 100 to form the photolyzable layer 200.
When the glue material is irradiated with light, the photolytic material contained in the glue material can be decomposed, so that the thickness of the photolytic material is reduced to form the first sub-portion 221, and the first sub-portion 221 is thin and is not easy to interfere with other layer structures of the display panel in position.
When the size includes a material such as resin that cannot be photolyzed, the size may be irradiated with light to assist in the steps of rinsing or cleaning to remove the size from the display area AA. So that the decomposable adhesive layer 220 is located in the bending region PA.
Alternatively, in other alternative embodiments, the decomposable glue layer 220 comprises a pyrolyzable material, for example, and heating the decomposable glue layer 220 causes decomposition of the decomposable glue layer 220 when the temperature reaches the decomposition temperature.
In some alternative embodiments, the decomposable material comprises a dissolvable material, for example, and the dissolvable material layer 220 is dissolved and then decomposed by coating a dissolvable substance on the surface of the decomposable material layer 220.
In order to avoid that the decomposable adhesive layer 220 located in the PA portion of the bending region is too thick, the thickness of the decomposable adhesive layer 220 located in the PA portion of the bending region is within the preset thickness range, and the setting manner of the preset thickness range is various, so long as the cover plate 500 does not tilt to make the display panel generate bubbles when the decomposable adhesive layer 220 located in the PA portion of the bending region is within the preset thickness range. For example, the predetermined thickness is in the range of 80 μm to 120 μm.
When the preset thickness range is 80 μm to 120 μm, the thickness of the decomposable adhesive layer 220 located in the bending region PA is within a reasonable range, so that the cover plate 500 can be better attached to the decomposable adhesive layer 220. The gap between the decomposable adhesive layer 220 and the cover plate 500 caused by the excessively thin decomposable adhesive layer 220 can be prevented, and the display panel can generate bubbles. Meanwhile, the cover plate 500 can be prevented from being warped at the position of the decomposable adhesive layer 220 due to the fact that the decomposable adhesive layer 220 located in the bending area PA is too thick, and then the display panel is enabled to generate bubbles.
For example, when the decomposable adhesive layer 220 is located in the bending region PA, the thickness of the decomposable adhesive layer 220 is 80 μm to 120 μm. When the decomposable adhesive layer 220 includes the first and second subsections 221 and 22, the thickness of the second subsection 222 is 80 μm to 120 μm.
In order to enable the portion of the display panel located in the bending region PA to be bent better, the decomposable adhesive layer 220 and the optical adhesive layer 210 are spaced by a preset distance. The preset distance can be set in various ways as long as the bending of the display panel is not affected.
In some alternative embodiments, the predetermined distance is 150 μm to 250 μm, and the distance between the decomposable adhesive layer 220 and the optical adhesive layer 210 in the first direction is 150 μm to 250 μm. Can prevent that the predetermined distance undersize between resolvable glue layer 220 and the optics glue film 210 from influencing display panel's normal buckling, prevent simultaneously that the distance between resolvable glue layer 220 and the optics glue film 210 is too big for appear great gap in the display panel, reduce display panel's quality.
For example, when the glue layer 220 is located in the bending region PA, the distance between the glue layer 220 and the optical glue layer 210 in the first direction is 150 μm to 250 μm. When the decomposable adhesive layer 220 includes the first and second subsections 221 and 222, the distance between the first subsection 221 and the optical adhesive layer 210 in the first direction is 150 μm to 250 μm.
The second embodiment of the present invention further provides a display device, including the display panel. Since the display device of the embodiment of the invention includes the display panel, the display device of the embodiment of the invention has the beneficial effects of the display panel, and the description is omitted here.
The display device in the embodiment of the present invention includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, a door lock, an intelligent fixed-line telephone, a console, and other devices having a display function.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for forming a display panel according to a third embodiment of the present invention. The display panel is the display panel described in the first embodiment, the display panel has the display area AA and the bending area PA which are successively distributed in the first direction, and the forming method of the display panel according to the third embodiment of the present invention shown in fig. 5 includes:
step S501: and coating a sizing material on the array substrate, wherein the sizing material comprises a decomposable material which can be decomposed when preset conditions are met.
As mentioned above, the sizing may also include materials such as resins, which are not described in detail herein.
Step S502: and decomposing the decomposable material coated on the display area to form a decomposable glue layer.
After the decomposition material is decomposed, the decomposable adhesive layer 220 may be located in the bending region PA, or the decomposable adhesive layer 220 may include a first part 221 located in the display region AA and a second part 222 located in the bending region PA.
Step S503: and coating an optical adhesive material on the array substrate to form an optical adhesive layer, wherein the optical adhesive layer is arranged in the display area.
Step S504: and covering a cover plate on one side of the decomposable adhesive layer and the optical adhesive layer, which is far away from the array substrate, so as to form the display panel.
In the display panel forming method according to the third embodiment of the invention, after the array substrate 100 is coated with the glue material, since the decomposable material in the glue material can be decomposed when the preset condition is met, the decomposable material coated on the display area can be decomposed, and the decomposable material coated on the display area AA can be thinned or eliminated, so as to form the decomposable glue layer 220. Avoid other layer structures of resolvable glue layer 220 and display panel to take place interference on the position for apron 500 can laminate completely with resolvable glue layer 220, avoids display panel consequently to produce the bubble.
The sequence of the steps S501 and S503 is not limited, and in the process of forming the display panel, the optical adhesive layer 210 may be formed by coating an optical adhesive material on the array substrate 100, and then the decomposable adhesive layer 220 may be formed by coating a photolytic material on the array substrate; alternatively, the decomposable adhesive layer 220 may be formed on the array substrate 100, and then the optical adhesive layer 210 may be formed. As long as the optical adhesive layer 210 is located in the display area AA, the decomposable adhesive layer 220 is located in the bending area PA.
Referring to fig. 6, fig. 6 is a flowchart illustrating a method for forming a display panel according to another embodiment of the present invention. The preset condition is a lighting condition, when the decomposable material includes a photolyzable material, the setting manner of step S502 is various, and in some alternative embodiments, step S502 further includes:
step S5021: one side of the decomposable adhesive layer, which is far away from the array substrate, is covered with a first mask plate with a first opening.
Wherein the first opening is arranged corresponding to the glue of the display area AA.
Step S5022: and irradiating the glue material by adopting decomposition light to decompose the decomposable material in the display area to form a decomposable glue layer.
In these optional embodiments, first, the first mask 600 is covered on the decomposable adhesive layer 220, and the first opening 610 of the first mask 600 corresponds to the decomposable material in the display area AA, and the first opening 610 is disposed corresponding to the coating in the display area AA; then, the decomposed light is irradiated, so that the decomposed light can be irradiated on the decomposable material applied to the display area AA through the first opening 610, and thus the decomposable material located in the display area AA can be thinned or removed to form the decomposable adhesive layer 220, thereby preventing the decomposable adhesive layer 220 from interfering with the touch screen 300 or the polarizer 400 in position to cause the tilting of the touch screen 300 or the polarizer 400, for example.
Referring to fig. 7, fig. 7 is a flowchart illustrating a method for forming a display panel according to another embodiment of the present invention.
In some optional embodiments, after step S502, the method for forming a display panel further includes step S505: and decomposing the decomposable adhesive layer coated on the bending area, so that the thickness of the decomposable adhesive layer is within a preset thickness range.
The step of decomposing the decomposable adhesive layer 220 applied to the bending region PA such that the thickness of the decomposable adhesive layer 220 is within a predetermined thickness range includes, for example: covering a second mask plate 700 with a second opening 710 on a side of the decomposable adhesive layer 220 away from the array substrate 100, so that the decomposable adhesive layer 220 is exposed from the second opening 710; the decomposable adhesive layer 220 is irradiated with decomposition light so that at least a portion of the decomposable adhesive layer 220 away from the array substrate 100 is decomposed, and the thickness of the decomposable adhesive layer 220 is within a predetermined thickness range.
In these alternative embodiments, the second mask 700 is covered on the decomposable adhesive layer 220, and the second opening 710 of the second mask 700 corresponds to the bending region PA, so that the decomposable adhesive layer 220 is exposed from the second opening 710. The decomposed light can directly irradiate the decomposable adhesive layer 220, so that at least part of the decomposable adhesive layer 220 can be decomposed, and the thickness of the decomposable adhesive layer 220 is reduced, so that the thickness of the decomposable adhesive layer 220 is within a preset thickness range. The problem that the display panel generates bubbles due to the fact that the cover plate 500 cannot be completely attached to the decomposable adhesive layer 220 due to the fact that the thickness of the decomposable adhesive layer 220 is too thick is avoided. The predetermined thickness is, for example, 80 μm to 120 μm.
There are various ways to decompose the thickness of the decomposable adhesive layer 220 within a predetermined thickness range, for example, by controlling the irradiation time of the decomposition light so that the thickness of the decomposable adhesive layer 220 is within the predetermined range. Alternatively, the irradiation intensity of the decomposition light is controlled so that the thickness of the decomposable adhesive layer 220 is within a predetermined range.
There are various types of arrangements for decomposing light, for example, decomposing light into pulsed laser light, and decomposing a decomposition material by irradiation of the pulsed laser light.
The wavelength of the decomposed light may be set in various ways, for example, the wavelength of the decomposed light is 400nm or more, and preferably, the wavelength of the decomposed light is 500nm to 550 nm. By reasonably controlling the wavelength of the pulse laser, the pulse laser is prevented from damaging other parts of the display panel.
Taking the display panel shown in fig. 1 and fig. 2 as an example, please refer to fig. 8a to fig. 8h together to describe a forming method of a display panel according to a third embodiment of the present invention:
the method comprises the following steps: referring to fig. 8a, an adhesive layer 200 is coated on the array substrate 100, and the adhesive layer 200 includes an optical adhesive layer 210 located in the display area AA and a decomposable adhesive layer 220 approximately located in the bending area PA. The decomposable adhesive layer 220 is formed by coating of an adhesive, and due to the limitation of the coating process, there is a high possibility that the adhesive may overflow from the bending region PA to the display region AA when the adhesive is coated. The compound is, for example, a compound comprising a decomposable material and a resin as described above.
Step two: referring to fig. 8b, a first mask 600 is covered on a side of the decomposable adhesive layer 220 away from the array substrate 100, the first mask 600 has a first opening 610, and the first opening 610 is disposed corresponding to the decomposable adhesive layer 220 in the display area AA.
The size of the first opening 610 is not limited, and the first opening 610 may be located in the entire display area AA, or the first opening 610 is disposed by extending a preset width from the bending area PA toward the edge of the display area AA along a direction away from the bending area PA. As long as the decomposable adhesive layer 220 located in the display area AA can be exposed from the first opening 610.
Step three: referring to fig. 8c, the decomposable adhesive layer 220 is irradiated by a decomposing light. Due to the shielding effect of the first mask 600, the decomposition light can only decompose the decomposable adhesive layer 220 exposed from the first opening 610, so that the decomposable adhesive layer 220 in the display area AA is decomposed. In fig. 8c, the irradiation direction of the decomposed light is shown by an arrow, and the arrow does not limit the structure of the display panel according to the embodiment of the present invention, and is only used to illustrate the decomposed light.
After the third step, if the glue material includes an undegradable material such as resin, after the decomposed material included in the decomposable glue layer 220 is decomposed by the decomposing light, the thickness of the decomposed glue layer 220 in the display area AA is less than or equal to the thickness of the optical glue layer 210, i.e., the decomposed glue layer 220 includes the first sub-portion 221 and the second sub-portion 222. However, when the thickness of the adhesive layer 220 in the display area AA is greater than or equal to the thickness of the optical adhesive layer 210, a cleaning step such as flushing may be performed to remove the adhesive in the display area AA, i.e., to make the adhesive layer 220 in the bending area PA.
Step four: referring to fig. 8d, after the irradiation of the decomposable adhesive layer 220 in the display area AA is finished, the first mask 600 is removed.
At this time, when the thickness of the decomposable adhesive layer 220 is within the predetermined thickness range, the decomposing step may be ended, and the touch screen 300, the polarizer 400 and the cover plate 500 are sequentially covered on the adhesive layer 200 to form the display panel. If the thickness of the decomposable glue layer 220 is thick and the thickness of the decomposable glue layer 220 exceeds the thickness threshold, the photolysis of the decomposable glue layer 220 is continued.
Step five: referring to fig. 8e, a second mask 700 having a second opening 710 is covered on a side of the decomposable adhesive layer 220 away from the array substrate 100, such that the decomposable adhesive layer 220 is exposed from the second opening 710. The second opening 710 is disposed corresponding to the decomposable adhesive layer 220 in the bending region PA.
Step six: referring to fig. 8f, the decomposable adhesive layer 220 is irradiated with the decomposition light, so that at least a portion of the decomposable adhesive layer 220 away from the array substrate 100 is decomposed, and the thickness of the decomposable adhesive layer 220 is reduced, so that the thickness of the decomposable adhesive layer 220 is within the predetermined thickness range. As described above, the irradiation direction of the decomposed light is shown by the arrows in fig. 8f, and the arrows do not limit the structure of the display panel according to the embodiment of the present invention, and are only used to illustrate the decomposed light.
Step seven, referring to fig. 8g, when the thickness of the decomposable adhesive layer 220 is within the preset thickness range, the irradiation is stopped, and the second mask 700 is removed.
Step eight, referring to fig. 8h, the touch screen 300, the polarizer 400 and the cover plate 500 are sequentially covered on the adhesive layer 200 to form the display panel.
According to the forming method of the display panel of the third embodiment of the invention, since the adhesive layer 200 includes the decomposable adhesive layer 220 and the decomposable adhesive layer 220 includes the decomposable material, the decomposable adhesive layer 220 is decomposed, so that the thickness or the coating range of the decomposable adhesive layer 220 is within a preset range, the decomposable adhesive layer 220 is prevented from interfering with the touch screen 300 and/or the polarizer 400, and bubbles are prevented from appearing on the display panel due to the tilting of the touch screen 300 and/or the polarizer 400. The decomposable adhesive layer 220 to the regional PA of buckling simultaneously decomposes, can also make the thickness of decomposable adhesive layer 220 in predetermineeing the thickness scope, prevents that the decomposable adhesive layer 220 is too thick to cause the not inseparable bubble that leads to appearing on the display panel of apron 500 laminating.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (10)
1. A display panel having a display area and a bend area successively distributed in a first direction, the display panel comprising:
an array substrate;
the glue layer is arranged on the array substrate and comprises an optical glue layer arranged in the display area and a decomposable glue layer at least partially arranged in the bending area, and the decomposable glue layer comprises a decomposable material capable of being decomposed when a preset condition is met;
the cover plate covers one side of the adhesive layer, which deviates from the array substrate.
2. The display panel of claim 1, wherein the decomposable material comprises at least one of a photolyzable material, a pyrolyzable material, or a dissolvable material;
preferably, the preset condition is a lighting condition, and the decomposable material comprises a photolyzable material;
preferably, the decomposable material comprises a triazine-based polymer.
3. The display panel according to claim 1,
the decomposable adhesive layer is positioned in the bending area;
preferably, the thickness of the decomposable adhesive layer is 80-120 μm;
preferably, the distance between the decomposable adhesive layer and the optical adhesive layer in the first direction is 150 to 250 μm.
4. The display panel according to claim 1, wherein the decomposable adhesive layer comprises a first subsection at the display area and a second subsection at the bending area, the first subsection and the second subsection are distributed in succession in the first direction, and the thickness of the first subsection is less than or equal to that of the optical adhesive layer;
preferably, the thickness of the second part is 80 to 120 μm;
preferably, the thickness of the first subsection is less than or equal to 25 μm;
preferably, the distance between the first branches and the optical adhesive layer in the first direction is 150 to 250 μm.
5. A display device characterized by comprising the display panel according to any one of claims 1 to 4.
6. A method for forming a display panel, wherein the display panel has a display area and a bending area distributed in succession in a first direction, the method comprising:
coating a sizing material on the array substrate, wherein the sizing material comprises a decomposable material which can be decomposed when a preset condition is met;
decomposing the decomposable material in the display area to form a decomposable glue layer;
coating an optical adhesive material on the array substrate to form an optical adhesive layer positioned in the display area;
and covering a cover plate on one side of the decomposable adhesive layer and the optical adhesive layer, which deviates from the array substrate, so as to form the display panel.
7. The method of claim 6, wherein the predetermined condition is a lighting condition, the decomposable material comprises a photolyzable material, and the step of decomposing the decomposable material in the display region to form a decomposable adhesive layer comprises:
covering a first mask plate with a first opening on one side of the glue stock, which is far away from the array substrate, wherein the first opening is arranged corresponding to the decomposable material in the display area;
and irradiating the glue material by adopting decomposition light to decompose the decomposable material positioned in the display area to form a decomposable glue layer.
8. The method of claim 6, wherein the predetermined condition is a lighting condition, the decomposable material comprises a photolyzable material, and after the step of decomposing the decomposable material in the display region to form a decomposable glue layer, the method further comprises:
covering a second mask plate with a second opening on one side of the decomposable adhesive layer, which is far away from the array substrate, so that the decomposable adhesive layer is exposed from the second opening;
and irradiating the decomposable adhesive layer by using decomposed light so as to decompose at least part of the decomposable adhesive layer deviating from the side of the array substrate, so that the thickness of the decomposable adhesive layer is within a preset thickness range.
9. The method of claim 7 or 8, wherein the decomposed light is pulsed laser light.
10. The method according to claim 7 or 8,
the wavelength of the decomposed light is greater than or equal to 400 nm;
preferably, the wavelength of the decomposed light is 500nm to 550 nm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113370601A (en) * | 2021-06-21 | 2021-09-10 | 合肥维信诺科技有限公司 | Support structure, preparation method thereof and display assembly |
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| CN110224013A (en) * | 2019-06-19 | 2019-09-10 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof, display device |
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