CN114994987A - Display panel and manufacturing method thereof - Google Patents
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- CN114994987A CN114994987A CN202210804114.6A CN202210804114A CN114994987A CN 114994987 A CN114994987 A CN 114994987A CN 202210804114 A CN202210804114 A CN 202210804114A CN 114994987 A CN114994987 A CN 114994987A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 113
- 230000001681 protective effect Effects 0.000 claims abstract description 40
- 229920001971 elastomer Polymers 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 162
- 239000000463 material Substances 0.000 claims description 33
- 239000003292 glue Substances 0.000 claims description 31
- 239000004973 liquid crystal related substance Substances 0.000 claims description 29
- 239000012790 adhesive layer Substances 0.000 claims description 19
- 239000000565 sealant Substances 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000004642 Polyimide Substances 0.000 description 22
- 229920001721 polyimide Polymers 0.000 description 22
- 238000005520 cutting process Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000593 degrading effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
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Abstract
The application provides a display panel and a manufacturing method thereof; the display panel comprises a substrate and an alignment film layer arranged on the substrate, the substrate comprises a display area and a frame rubber area positioned on the periphery of the display area, the alignment film layer is arranged in the display area, the alignment film layer comprises a central part and an edge part positioned on the periphery of the central part, at least part of the edge part extends to be flush with an interface between the frame rubber area and the display area, and the fluctuation height difference of the surface of the edge part, far away from the substrate, is less than or equal to 50 micrometers; according to the application, the protective film layer is arranged at the edge position of the substrate in the manufacturing process of the display panel, and the alignment film layer is coated on the whole surface of the substrate, so that the boundary of the alignment film layer can extend to the edge of the substrate far away from the display area on the premise of overcoming the moisture absorption problem, the bad phenomenon that the coffee ring effect at the boundary position extends into the display area is prevented or reduced, and the bad problems of dirty marks and the like at the periphery of the display area are improved.
Description
Technical Field
The present application relates to the field of display devices, and more particularly, to a display panel and a method for manufacturing the same.
Background
With the gradual maturity of liquid crystal display technology, the application field of liquid crystal display screens is also increasing. The vehicle-mounted screen, the spliced screen and the like have higher requirements on the narrow frame, so that the space between the display area of the display screen and the frame glue needs to be further compressed. Currently, in order to avoid the moisture absorption problem of the PI (polyimide) alignment film in the display screen, the PI (polyimide) alignment film is generally coated within a range that the frame glue encloses. Therefore, in the current narrow-bezel lcd panel, the PI (polyimide) alignment film usually extends to be half-overlapped or fully-overlapped with the sealant, so that the display area of the display screen is as close to the sealant as possible, thereby reducing the bezel width of the display screen.
However, since the PI alignment film has a "coffee ring effect" at its boundary, a too small distance between the PI alignment film boundary and the display region tends to cause a defect such as stain around the display region of the liquid crystal display panel, thereby degrading the display quality.
Disclosure of Invention
The application provides a display panel and a manufacturing method thereof, which are used for solving the technical problem that the poor phenomena of the current narrow-frame liquid crystal display panel, such as peripheral stain and the like, are caused in a display area due to the coffee ring effect existing at the boundary of a PI alignment film.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
a display panel comprises a display area and a frame rubber area positioned at the periphery of the display area; the display panel includes:
a substrate; and
the alignment film layer is arranged on the substrate;
the alignment film layer comprises a central portion and an edge portion located on the periphery of the central portion, and the undulation height difference of the surface of the edge portion on the side far away from the substrate is 600-800 micrometers.
In the display panel of the present application, the edge portion includes a plurality of crest portions and a plurality of trough portions that are alternately arranged, and a distance from a side surface of the crest portion away from the substrate to the substrate is greater than or equal to a distance from a side surface of the trough portion away from the substrate to the substrate;
the undulation height difference of the surface of the edge part on the side far away from the substrate is the distance between the crest part and the trough part in the direction perpendicular to the alignment film layer.
In the display panel of the present application, a distance between a highest point of the crest portion and a lowest point of the trough portion in an alternating direction of the crest portions and the trough portions is less than or equal to 50 micrometers.
In the display panel of the present application, the display panel further includes a transition region disposed between the display region and the frame glue region;
wherein the central portion is located on the substrate in the display area, and the edge portion is located on the substrate in the transition area or/and the frame glue area.
In the display panel of the present application, the edge portion is located in the transition region, and a distance between a side of the edge portion away from the display region and the display region is greater than or equal to 300 micrometers.
In the display panel of the present application, the edge portion is continuously disposed in the transition region and the frame rubber region, and the edge portion covers at most half of the frame rubber region.
The application also provides a manufacturing method of the display panel, wherein the display panel comprises a display area, a frame glue area positioned on the periphery of the display area and a non-display area positioned on one side, far away from the display area, of the frame glue area; the manufacturing method of the display panel comprises the following steps:
providing a substrate;
forming a protective film layer on the substrate in the frame glue area and the non-display area;
forming an alignment material layer on the whole surface of the substrate, and enabling the alignment material layer to cover the display area, the frame glue area and the non-display area;
and removing the alignment material layer and the protective film layer in the frame adhesive area and the non-display area to form an alignment film layer comprising a central part and an edge part positioned on the periphery of the central part.
In the display panel of the present application, the protective film layer includes a photoreactive decomposition material or/and a thermal reactive decomposition material.
In the display panel of the present application, the method for manufacturing the display panel further includes:
forming a liquid crystal layer on the alignment film layer in the display area;
forming a frame glue layer on the substrate in the frame glue area, and enabling the frame glue layer to surround the periphery of the liquid crystal layer;
and compounding another substrate on one side of the liquid crystal layer, which is far away from the substrates, so that the liquid crystal layer and the frame adhesive layer are positioned between the two substrates.
In the display panel of the present application, the step of removing the alignment material layer and the protective film layer in the frame glue region and the non-display region includes:
processing the protective film layer and the alignment material layer corresponding to the protective film layer in an exposure or heating mode;
and removing the protective film layer and the alignment material layer in the frame glue area by adopting a developing or/and cleaning mode.
Advantageous effects
According to the method, the protective film layer is arranged at the edge position of the substrate in the manufacturing process of the display panel, the alignment film layer is coated on the whole surface of the substrate, the boundary of the alignment film layer can extend to the edge of the substrate far away from the display area on the premise of overcoming the moisture absorption problem, and then the alignment film layer at the boundary position corresponding to the protective film layer and the protective film layer is removed, so that the surface of the edge part far away from the side of the substrate tends to be flat, the bad phenomenon that the coffee ring effect at the boundary position extends into the display area is prevented or reduced, and the problems of bad stains and the like at the periphery of the display area caused by the undersize distance between the boundary of the alignment film layer and the display area are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic view of an overall structure of a display panel according to the present application;
FIG. 2 is a schematic view of a first partial structure of a display panel according to the present application;
FIG. 3 is a schematic structural diagram of an edge portion of an alignment film layer according to the present disclosure;
FIG. 4 is a schematic diagram of a second partial structure of a display panel according to the present application;
FIG. 5 is a schematic view of a third partial structure of a display panel according to the present application;
FIG. 6 is a block diagram of a method for fabricating a display panel according to the present application;
FIG. 7 is a schematic view of batch processing of substrates described herein;
fig. 8 to 12 are schematic flow charts of a method for manufacturing a display panel according to the present application.
Description of reference numerals:
100. a substrate; 101. a display area; 102. a transition zone; 103. a frame glue area; 104. a non-display area;
200. aligning the film layer; 210. a central portion; 220. an edge portion; 230. a cutting section;
300. a frame glue layer;
400. a planarization layer;
500. a substrate;
600. a protective film layer;
700. and a liquid crystal layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
At present, a via hole is usually formed in an outer region of the sealant, which is far away from the display region, of the array substrate or the color film substrate of the liquid crystal display panel, so as to connect a driving circuit in the display panel. The PI (polyimide) alignment film in the display screen is coated on the via hole, which may cause abnormal circuit connection due to moisture absorption, so the coating of the PI (polyimide) alignment film generally cannot exceed the range enclosed by the frame glue. In the current narrow-bezel liquid crystal display panel, a PI (polyimide) alignment film usually extends to be half-overlapped or full-overlapped with a sealant, so that a display area of the display screen is as close to the sealant as possible, thereby narrowing the bezel width of the display screen. However, since the PI alignment film has a "coffee ring effect" at its boundary, a too small distance between the PI alignment film boundary and the display region tends to cause a defect such as stain around the display region of the liquid crystal display panel, thereby degrading the display quality. The present application proposes the following solutions based on the above technical problems.
Referring to fig. 1 to 5, the present application provides a display panel, which includes a display region 101 and a sealant region 103 located at the periphery of the display region 101, and the display panel includes a substrate 100 and an alignment film layer 200 disposed on the substrate 100. The alignment film layer 200 comprises a central portion 210 and an edge portion 220 located at the periphery of the central portion 210, and the undulation height difference of the surface of the edge portion 220 on the side far away from the substrate 100 is 600 micrometers to 800 micrometers.
In the present application, the protective film 600 is disposed at the edge of the substrate 100 during the manufacturing process of the display panel, and the alignment film 200 is coated on the entire surface of the substrate 100, on the premise of overcoming the problem of moisture absorption, the boundary of the alignment film layer 200 can extend to the edge of the substrate 100 far away from the display area 101, and then the alignment film layer 200 except the protective film layer 600 and the corresponding boundary position of the protective film layer 600 is removed, so that the surface fluctuation height difference of the edge part 220 far away from the substrate 100 side is 600-800 micrometers, the surface fluctuation range is obviously smaller than the surface fluctuation height difference of the alignment film in the conventional display panel, 200-1200 micrometers, that is, the edge portion 220 of the alignment layer 200 in this embodiment tends to be more flat, so as to prevent or reduce the undesirable phenomenon that the "coffee ring effect" at the boundary position extends into the display region 101, therefore, the defect problems of stains around the display area 101 and the like caused by the excessively small distance between the boundary of the alignment film layer 200 and the display area 101 are solved.
The technical solution of the present application will now be described with reference to specific embodiments. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Referring to fig. 1, the display panel may be a liquid crystal display panel, and the liquid crystal display panel may include an array substrate, a color film substrate, and a liquid crystal layer 700 disposed between the array substrate and the color film substrate, where the liquid crystal layer 700 is located in the display area 101 of the display panel.
In this embodiment, the substrate 100 may be the array substrate or/and the color filter substrate.
Referring to fig. 2 and fig. 3, in this embodiment, the display panel may further include a transition region 102 located between the sealant region 103 and the display region 101, and a non-display region 104 located on a side of the sealant region 103 far from the display region 101. The substrate 100 in the transition region 102 may be provided with metal traces for electrically connecting a pixel driving circuit in the substrate 100 with an external driving circuit, and the edge portion 220 of the alignment film layer 200 may be located in the transition region 102. An interlayer via hole (not shown) is disposed on the substrate 100 in the non-display region 104, and the driving module may also be electrically connected to the pixel driving circuit on the substrate 100 through the interlayer via hole.
In this embodiment, the alignment layer 200 may be disposed on a side surface of the substrate 100 close to the liquid crystal layer 700.
In this embodiment, the material of the alignment film layer 200 may be a Polyimide (PI) coating layer. The central portion 210 and the edge portion 220 of the alignment film layer 200 may be integrally formed of a polyimide material by coating the entire side surface of the substrate 100.
Referring to fig. 3, in the display panel of the present application, the edge portion 220 may include a plurality of wave crest portions 221 and a plurality of wave trough portions 222 alternately arranged, and the plurality of wave crest portions 221 and the plurality of wave trough portions 222 alternately form a wave shape in a direction from the display area 101 to the sealant area 103.
In this embodiment, a distance h1 from the side of the crest 221 away from the substrate 100 to the substrate 100 is greater than or equal to a distance h2 from the side of the trough 222 away from the substrate 100 to the substrate. The undulation height difference Δ h of the surface of the edge portion 220 away from the substrate 100 is the distance between the crest portion 221 and the trough portion 222 in the direction perpendicular to the alignment film layer 200, i.e., Δ h is h1-h 2.
It should be noted that, since the alignment film layer 200 in the liquid crystal display panel is generally formed by coating, the edge portion 220 of the alignment film layer 200 generally has a corrugated shape. Unlike the conventional display panel, since the "original boundary" of the alignment film layer 200 is removed in the present embodiment, the undulation height difference Δ h of the edge portion 220 finally remained in the alignment film layer 200 in the present embodiment is 600 micrometers to 800 micrometers, and the undulation range is much smaller than the undulation height difference 200 micrometers to 1200 micrometers of the alignment film layer 200 in the conventional display panel.
Referring to fig. 3, in the present embodiment, in the alternating direction of the plurality of crest portions 221 and the plurality of trough portions 222, the distance d between the highest point of the crest portion 221 and the lowest point of the trough portion 222 is less than or equal to 50 micrometers. According to the diffusion rule of the corrugation, when the corrugation is diffused from inside to outside, the distance between the highest point of the peripheral wave crest and the lowest point of the adjacent wave trough is gradually increased from inside to outside in the diffusion direction of the corrugation.
In the present embodiment, the "original boundary" of the alignment film layer 200 is removed, and the remaining edge portion 220 is used as a new boundary of the alignment film layer 200, the new boundary is closer to the display region 101 than the "original boundary" is, which is equivalent to being closer to the center of the corrugation, so that the distance d between the highest point of the crest portion 221 and the lowest point of the adjacent trough portion 222 is smaller than the distance of about 750 μm between the crest and the trough of the alignment film layer in the conventional display panel. In the present embodiment, in an ideal state, a surface of the edge portion 220 on a side away from the substrate 100 may be a flat surface parallel to the substrate 100. At this time, the edge portion 220 is far from the position of the alignment film layer 200, the "original boundary", or the "original boundary" of the alignment film layer 200 extends to the edge position of the substrate 100 and is far from the display region 101, so that the "ripple shape" of the edge portion 220 located in the display region 101 is not obvious or substantially no ripple expression, and the surface of the edge portion 220 on the side far from the substrate 100 of the alignment film layer 200 macroscopically appears to be parallel to the flat surface of the substrate 100.
Through the above arrangement, the surface of the edge portion 220 on the side away from the substrate 100 tends to be flat, and the defect that the "coffee ring effect" at the boundary position extends into the display area 101 is prevented or reduced, so that the defect such as stain around the display area 101 caused by the too small distance between the boundary of the alignment film layer 200 and the display area 101 is improved.
Referring to fig. 2, 4 and 5, in the display panel of the present application, the central portion 210 may be located on the substrate 100 in the display region 101, and the edge portion 220 may be located on the substrate 100 in the transition region 102 or/and the sealant region 103.
Specifically, referring to fig. 2, in the present embodiment, the edge portion 220 may be located in the transition region 102, and a distance L between a side of the edge portion 220 away from the display region 101 and the display region 101 is greater than or equal to 300 μm, so that the distance between the side of the edge portion 220 away from the display region 101 and the display region 101 is sufficiently large, and therefore, a stain defect caused by a "coffee ring effect" is further reduced.
Referring to fig. 1 and fig. 4, in the present embodiment, the display panel may further include a frame adhesive layer 300, the frame adhesive layer 300 may be located in the frame adhesive region 103 and disposed around the display region 101, and the frame adhesive layer 300 encloses the liquid crystal layer 700 in the display region 101.
In this embodiment, at least a side surface of the edge portion 220 close to the frame adhesive region 103 may be attached to or parallel to a side surface of the frame adhesive layer 300 close to the display region 101. It should be noted that, since the alignment film layer 200 in this embodiment is manufactured by removing the boundary position, the side surface of the edge portion 220 of the alignment film layer 200 close to the frame adhesive region 103 is the "cut section" of the alignment film layer 200, and the "cut section" is attached to or parallel to the side surface of the frame adhesive layer 300 close to the display region 101, so that the alignment film layer 200 does not need to extend to overlap with the frame adhesive layer 300, and no "coffee halo" or other dirty marks are formed in the display region 101 due to the "coffee ring effect".
It should be noted that, in an ideal state, as shown in fig. 5, the edge portion 220 of the alignment film layer 200 and the frame adhesive layer 300 should be exactly bordered. That is, the edge of the edge portion 220 of the alignment film layer 200 away from the display region 101 is attached to the edge of the frame adhesive layer 300 close to the display region 101. However, under the influence of the manufacturing process or the precision of the device, there may be a small gap between the edge portion 220 of the alignment film layer 200 and the frame adhesive layer 300, and the "cut section" is parallel to the side of the frame adhesive layer 300 close to the display region 101.
In this embodiment, the protective film 600 is disposed to accurately remove the boundary of the alignment film layer 200, so that the alignment film layer 200 can fully cover the surface of the substrate 100 in the display area 101 while avoiding the problem of stains around the display area 101 caused by the "coffee ring effect" of the alignment film layer 200, thereby ensuring the normal alignment of the liquid crystal in the display panel and realizing the normal display function. Referring to fig. 5, in the present embodiment, the edge portion 220 may be continuously disposed on the substrate 100 in the transition region 102 and the frame rubber region 103, and at most half of the frame rubber region 103 is covered by the edge portion 220. In other words, the edge portion 220 may extend from the transition region 102 into the frame rubber region 103, and the width of the edge portion 220 in the frame rubber region 103 is not more than half of the width of the frame rubber region 103 in the direction from the transition region 102 to the frame rubber region 103. In other words, in the direction from the transition region 102 to the frame adhesive region 103, the overlapping area of the edge portion 220 and the frame adhesive layer 300 is not more than half of the area of the frame adhesive layer 300.
Referring to fig. 6 to 11, an embodiment of the present application further provides a manufacturing method of a display panel, which can be used for manufacturing the display panel according to the above embodiment. The display panel can include a display area 101, a frame glue area 103 located at the periphery of the display area 101, and a non-display area 104 located at a side of the frame glue area 103 far from the display area.
Referring to fig. 6, fig. 6 is a flowchart illustrating a manufacturing method of a display panel according to the present application, where the manufacturing method of the display panel may include:
s100, a substrate 100 is provided.
S200, forming a protective film 600 on the substrate 100 in the frame glue region 103 and the non-display region 104, as shown in fig. 7.
S300, forming an alignment material layer on the entire surface of the substrate 100, and covering the substrate 100 in the display region 101, the frame glue region 103, and the non-display region 104 with the alignment material layer, as shown in fig. 8.
S400, removing the alignment material layer and the protective film 600 in the sealant region 103 and the non-display region 104 to form an alignment film 200 including a central portion 210 and an edge portion 220 located at the periphery of the central portion 210, as shown in fig. 9 and 10.
S500, combining the substrate 100 with another substrate 100, and connecting a driving module to form the display panel, as shown in fig. 1.
In this embodiment, the protection film layer 600 is disposed in the non-display region 104 (i.e., at the edge of the substrate 100), and the alignment film layer 200 is coated on the entire surface of the substrate 100, so that the boundary of the alignment film layer 200 extends to the edge of the substrate 100 away from the display region 101 on the premise of overcoming the moisture absorption problem, and then the alignment film layer 200 is removed from the boundary position corresponding to the protection film layer 600 and the protection film layer 600, thereby effectively preventing or reducing the defect that the "coffee ring effect" at the boundary position extends into the display region 101, and improving the defect such as stain around the display region 101 caused by the too small distance between the boundary of the alignment film layer 200 and the display region 101.
Referring to fig. 11, in the method for manufacturing a display panel of the present application, the number of the substrates 100 in the step S100 may be one or more. The plurality of the base plates 100 can be arranged on the same substrate 500 to be manufactured synchronously, so that a plurality of plates to be assembled with the same structure are formed, batch processing of the base plates 100 is realized, and production efficiency is improved.
In the method for manufacturing a display panel of the present application, the protective film layer 600 in the step S200 may include a photoreactive decomposition material or/and a thermal decomposition material. The photoreactive decomposition material may include an organic resin material having an unsaturated bond such as a double bond and being photolytically decomposable by irradiation of ultraviolet rays, for example, polymethacrylic resin. The thermally reactive decomposition material may include a high molecular polymer material that can be decomposed by itself at a relatively low heating temperature, such as a polyurethane rigid foam material, and the like.
Referring to fig. 8, in the present embodiment, a flat layer 400 may be disposed on the entire side of the substrate 100 close to the liquid crystal layer 700, and the flat layer 400 may be a film layer on the array substrate 100 for performing a planarization process on a rugged surface in the display area 101, that is, the flat layer 400 may be disposed in the display area 101, the sealant area 103, and the non-display area 104.
In this embodiment, in the step S200, the protective film 600 may be disposed on the flat layer 400 in all of the frame adhesive regions 103 and all of the non-display regions 104. The alignment film layer 200 may further include a cutting portion 230 located on a side of the edge portion 220 away from the central portion 210, and the cutting portion 230, the edge portion 220 and the central portion 210 may be integrally formed into the alignment film layer 200 by coating the entire surface.
In this embodiment, the cutting portion 230 may extend from the frame rubber region 103 into the non-display region 104 and cover at least a portion of the protection film layer 600 in the non-display region 104. Similarly to the protection film layer 600, the cutting portion 230 only serves as a "sacrificial portion" functioning as an extension boundary within the alignment film layer 200. In the final display panel product of the present application, the cut part 230, which is a "sacrificial part", may be removed together with the protective film layer 600, and thus is not present in the final display panel product of the present application.
In this embodiment, the alignment layer 200 may be formed after the protective layer 600, that is, after the protective layer 600 is formed in the non-display region 104 of the substrate 100, and then the alignment layer 200 is coated on the entire surface of the substrate 100, wherein the alignment layer 200 is composed of the central portion 210, the edge portion 220 and the cutting portion 230.
This application is through the base plate 100 frame gum district 103 with set up protection rete 600 in the non-display area 104, make protection rete 600 can whole face coat extremely in the non-display area 104, both will protection rete 600's border extends to and keeps away from the display area 101, can protect moreover the via hole does not receive the problem influence of adsorbing of joining in marriage rete 200 between the layer in the non-display area 104 to ensure improve under the stable prerequisite of circuit connection in the display panel bad such as the peripheral dirty mark of display panel's display area 101 improves display effect.
Referring to fig. 12, in the embodiment, a side of the protection film layer 600 away from the display area 101 may extend to be flush with an edge of the non-display area 104 away from the frame glue area 103, that is, the protection film layer 600 may completely cover the substrate 100 in the non-display area 104, and the edge of the protection film layer 600 is flush with the edge of the substrate 100. In correspondence with the protection film layer 600, the cutting portion 230 may extend to cover the whole protection film layer 600, so as to make the boundary of the alignment film layer 200 far enough from the display region 101, further reducing the adverse effect of the "coffee ring effect" of the boundary position of the alignment film layer 200 on the display region 101.
In this embodiment, a side of the protective film 600 close to the display area 101 may be located in the sealant area 103, and in a direction from the non-display area 104 to the sealant area 103, a boundary line of the protective film 600 close to the display area 101 does not exceed a half width of the sealant area 103.
In the embodiment of the application, the protective film layer 600 is disposed at the edge of the substrate 100 during the manufacturing process of the display panel, and the alignment film layer 200 is coated on the entire surface of the substrate 100, so that the boundary of the alignment film layer 200 extends to the edge of the substrate 100 away from the display area 101 on the premise of overcoming the moisture absorption problem, and then the alignment film layer 200 except the boundary position corresponding to the protective film layer 600 and the protective film layer 600 is removed, so that the edge 220 of the remaining alignment film layer 200 is flush with the interface between the frame glue area 103 and the display area 101, and the surface of the edge 220 away from the substrate 100 tends to be flat, thereby preventing or reducing the undesirable phenomenon that the "coffee ring effect" at the boundary position extends into the display area 101, and improving the undesirable problems such as stain around the display area 101 caused by the too small distance between the boundary of the alignment film layer 200 and the display area 101.
In the method for manufacturing a display panel of the present application, in the step S300, forming an alignment material layer on the entire surface may be implemented by coating an alignment material Polyimide (PI) on the entire surface of the substrate 100. It is understood that the alignment material layer is the assembly of the alignment film layer 200, i.e., the central portion 210, the edge portion 220 and the cutting portion 230, before the "original boundary" is removed.
In this embodiment, the step S400 may include:
and S410, processing the protective film layer 600 and the alignment material layer corresponding to the protective film layer 600 through ultraviolet exposure or heating.
In the present embodiment, the protective film layer 600 composed of a photoreactive decomposition material or/and a thermal reaction decomposition material is decomposed during ultraviolet exposure or heating, so that the protective film layer 600 can be removed from the substrate 100.
And S420, removing the protective film layer 600 and the alignment material layer in the frame adhesive region 103 and the non-display region 104 by adopting a developing or/and cleaning mode.
In this embodiment, the protective film layer 600 and the corresponding alignment film layer 200 are removed through the above steps, so that the frame adhesive layer 300 can be disposed in the frame adhesive region 103 of the substrate 100, and the removal points of the protective film layer 600 and the alignment film layer 200 are accurate, which does not affect the normal display of the display panel.
In this embodiment, the step S500 may include:
s510, forming a liquid crystal layer 700 on the alignment film layer 200 in the display region 101.
S520, forming a frame adhesive layer 300 in the frame adhesive region 103, and making a side surface of the frame adhesive layer 300 close to the display region 101 and a side surface of the alignment film layer 200 close to the frame adhesive region 103 parallel or fit to each other.
In this embodiment, the frame adhesive layer 300 encloses the liquid crystal layer 700 in the display area 101.
And S530, compounding another substrate 100 on one side of the liquid crystal layer 700 away from the substrate 100, so that the liquid crystal layer 700 and the frame adhesive layer 300 are positioned between the two substrates 100.
And S540, connecting a driving module on the substrate 100 and packaging to form the display panel.
The display panel and the manufacturing method thereof provided by the embodiments of the present application are described in detail above, and the principle and the implementation manner of the present application are explained by applying specific examples herein, and the description of the embodiments above is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A display panel is characterized by comprising a display area and a frame rubber area positioned at the periphery of the display area; the display panel includes:
a substrate; and
the alignment film layer is arranged on the substrate;
the alignment film layer comprises a central portion and an edge portion located on the periphery of the central portion, and the undulation height difference of the surface of the edge portion on the side far away from the substrate is 600-800 micrometers.
2. The display panel according to claim 1, wherein the edge portion comprises a plurality of crest portions and a plurality of trough portions alternately arranged, and a distance from a side of the crest portion away from the substrate to the substrate is greater than or equal to a distance from a side of the trough portion away from the substrate to the substrate;
the undulation height difference of the surface of the edge part on the side far away from the substrate is the distance between the crest part and the trough part in the direction perpendicular to the alignment film layer.
3. The display panel according to claim 2, wherein a distance between a highest point of the crest portion and a lowest point of the trough portion in an alternating direction of the crest portions and the trough portions is less than or equal to 50 μm.
4. The display panel according to claim 1, further comprising a transition region disposed between the display region and the sealant region;
wherein the central portion is located on the substrate in the display area, and the edge portion is located on the substrate in the transition area or/and the frame glue area.
5. The display panel according to claim 4, wherein the edge portion is located in the transition region, and a side of the edge portion away from the display region is spaced from the display region by a distance greater than or equal to 300 μm.
6. The display panel according to claim 4, wherein the edge portion is continuously disposed in the transition region and the sealant region, and the edge portion covers at most half of the sealant region.
7. The manufacturing method of the display panel is characterized in that the display panel comprises a display area, a frame glue area positioned at the periphery of the display area and a non-display area positioned at one side of the frame glue area, which is far away from the display area; the manufacturing method of the display panel comprises the following steps:
providing a substrate;
forming a protective film layer on the substrate in the frame glue area and the non-display area;
forming an alignment material layer on the whole surface of the substrate, and enabling the alignment material layer to cover the display area, the frame glue area and the non-display area;
and removing the alignment material layer and the protective film layer in the frame adhesive area and the non-display area to form an alignment film layer comprising a central part and an edge part positioned on the periphery of the central part.
8. The method for manufacturing a display panel according to claim 7, wherein the protective film layer comprises a photoreactive decomposition material or/and a thermoreactive decomposition material.
9. The method for manufacturing a display panel according to claim 7, further comprising:
forming a liquid crystal layer on the alignment film layer in the display area;
forming a frame glue layer on the substrate in the frame glue area, and enabling the frame glue layer to surround the periphery of the liquid crystal layer;
and compounding another substrate on one side of the liquid crystal layer, which is far away from the substrates, so that the liquid crystal layer and the frame adhesive layer are positioned between the two substrates.
10. The method according to claim 7, wherein the step of removing the alignment material layer and the protective film layer in the frame glue region and the non-display region comprises:
processing the protective film layer and the alignment material layer corresponding to the protective film layer in an exposure or heating mode;
and removing the protective film layer and the alignment material layer in the frame rubber area by adopting a developing or/and cleaning mode.
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| CN202210804114.6A CN114994987A (en) | 2022-07-07 | 2022-07-07 | Display panel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210804114.6A CN114994987A (en) | 2022-07-07 | 2022-07-07 | Display panel and manufacturing method thereof |
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