CN114170896B - Display device and preparation method thereof - Google Patents
Display device and preparation method thereof Download PDFInfo
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- CN114170896B CN114170896B CN202111273051.8A CN202111273051A CN114170896B CN 114170896 B CN114170896 B CN 114170896B CN 202111273051 A CN202111273051 A CN 202111273051A CN 114170896 B CN114170896 B CN 114170896B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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Abstract
The invention discloses a display device and a preparation method thereof, wherein the display device comprises a display panel and a first cover plate, and at least one side of the first cover plate is provided with an optical adhesive layer; the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, the optical adhesive end part and the first cover plate end part at least partially overlap along the light emitting direction of the display panel, the optical adhesive middle part and the first cover plate middle part at least partially overlap, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part. Through the tip thickness attenuate of first apron, eliminate burr and the crackle that first apron tip produced in the cutting process, set up the optical cement of different modulus of elasticity simultaneously and bond with first apron tip and first apron intermediate part respectively, carry out good protection to first apron tip when guaranteeing that the bonding effect is good.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a preparation method thereof.
Background
The substrate used in the display device in the prior art is generally obtained by cutting a large plate, but burrs or microcracks exist at the edge of the cut large plate, and the substrate cannot be directly used.
Disclosure of Invention
The embodiment of the invention provides a display device and a preparation method thereof, wherein burrs and cracks generated in the cutting process of the end part of a first cover plate are eliminated by thinning the end part of the first cover plate. Meanwhile, the optical cement with different elastic moduli is respectively adhered to the end part of the first cover plate and the middle part of the first cover plate, so that good adhesion effect of different areas can be ensured, and good protection effect of the end part of the optical cement and good light transmission effect of the middle part of the optical cement can be ensured.
In a first aspect, an embodiment of the present invention provides a display device, including a display panel and a first cover plate located at a light emitting side of the display panel, where at least one side of the first cover plate is provided with an optical adhesive layer along a light emitting direction of the display panel;
the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other along a first direction, the first cover plate middle part is positioned at one side of the first cover plate end part, which is close to the center of the first cover plate, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the first direction is parallel to the plane where the display panel is located;
the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, and the optical adhesive middle part is positioned at one side of the optical adhesive end part, which is close to the center of the optical adhesive layer; along the light emitting direction of the display panel, the optical adhesive end part at least partially overlaps with the first cover plate end part, the optical adhesive middle part at least partially overlaps with the first cover plate middle part, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a display device, including:
providing a display panel;
preparing a first cover plate and an optical adhesive layer on the light-emitting side of the display panel, wherein the optical adhesive layer is positioned on at least one side of the first cover plate along the light-emitting direction of the display panel; the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other along a first direction, the first cover plate middle part is positioned at one side of the first cover plate end part, which is close to the center of the first cover plate, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the first direction is parallel to the plane where the display panel is located; the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, and the optical adhesive middle part is positioned at one side of the optical adhesive layer end part, which is close to the center of the optical adhesive layer; along the light emitting direction of the display panel, the optical adhesive end part at least partially overlaps with the first cover plate end part, the optical adhesive middle part at least partially overlaps with the first cover plate middle part, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part.
According to the display device provided by the embodiment of the invention, the first cover plate is arranged to comprise the first cover plate end part and the first cover plate middle part which are connected with each other, the thickness of the first cover plate end part is further arranged to be smaller than that of the first cover plate middle part, and burrs and cracks generated in the cutting process of the first cover plate end part are eliminated by thinning the first cover plate end part; the optical adhesive layer is further arranged to comprise an optical adhesive end part and an optical adhesive middle part, wherein the first cover plate end part and the optical adhesive end part are overlapped, the first cover plate middle part and the optical adhesive middle part are overlapped, and meanwhile, the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive middle part, so that good adhesion effects of different areas can be ensured, and good protection effects of the optical adhesive end part and good light transmission effects of the optical adhesive middle part can be ensured.
Drawings
In order to more clearly illustrate the technical solution of the exemplary embodiments of the present invention, a brief description is given below of the drawings required for describing the embodiments. It is obvious that the drawings presented are only drawings of some of the embodiments of the invention to be described, and not all the drawings, and that other drawings can be made according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a process of thinning an end portion of a first cover plate according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of region B of the display device shown in FIG. 1;
fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of region C of the display device shown in FIG. 5;
FIG. 7 is a top view of an optical adhesive layer according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a method for manufacturing a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be fully described below by way of specific embodiments with reference to the accompanying drawings in the examples of the present invention. It is apparent that the described embodiments are some, but not all, embodiments of the present invention, and that all other embodiments, which a person of ordinary skill in the art would obtain without making inventive efforts, are within the scope of this invention.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention, and as shown in fig. 1 and fig. 2, the embodiment of the present invention provides a display device 100, which includes a display panel 110 and a first cover plate 120 located at a light emitting side of the display panel 110, and an optical adhesive layer 130 is disposed on at least one side of the first cover plate 120 along a light emitting direction of the display panel 110;
along the first direction X, the first cover 120 includes a first cover end 121 and a first cover middle portion 122 connected to each other, the first cover middle portion 122 is located at one side of the first cover end 121 near the center of the first cover 120, and the thickness of the first cover middle portion 122 is greater than the thickness of the first cover end 121; the first direction X is parallel to the plane of the display panel 110;
the optical cement layer 130 comprises an optical cement end 131 and an optical cement middle 132, and the optical cement middle 132 is positioned at one side of the optical cement end 131 near the center of the optical cement layer 130; along the light emitting direction Y of the display panel 110, the optical adhesive end portion 131 at least partially overlaps the first cover plate end portion 121, the optical adhesive middle portion 132 at least partially overlaps the first cover plate middle portion 122, and the elastic modulus of the optical adhesive in the optical adhesive end portion 131 is greater than the elastic modulus of the optical adhesive in the optical adhesive middle portion 132.
Exemplary, the display device 100 provided by the embodiment of the invention includes a display panel 110, a first cover plate 120, and an optical adhesive layer 130, wherein the optical adhesive layer 130 is located between the display panel 110 and the first cover plate 120, and is used for bonding the display panel 110 and the first cover plate 120. Further, the first cover 120 includes a first cover end 121 and a first cover middle portion 122, and the thickness of the first cover end 121 is smaller than that of the first cover middle portion 122, that is, the first cover end 121 is thinned, so that burrs or microcracks generated in the cutting process of the first cover end 121 can be removed, and smoothness of the first cover end 121 is ensured. With continued reference to fig. 1 and 2, the first cover end 121 may further include a cover first end 1211 and a cover second end 1212, with the first cover middle portion 122 being located between the cover first end 1211 and the cover second end 1212 along the first direction X. Wherein, the first end 1211 and the second end 1212 of the cover may be thinned, so that burrs or microcracks generated during the cutting process of the first end 1211 and the second end 1212 of the cover may be removed, ensuring the smoothness of the first end 121 of the cover.
Further, the display device 100 provided in the embodiment of the present invention further includes an optical adhesive layer 130, as shown in fig. 1 and fig. 2, the optical adhesive layer 130 is located on at least one side of the first cover plate 120, fig. 2 illustrates an example in which the optical adhesive layer 130 is located on the lower side of the first cover plate 120, and fig. 1 illustrates an example in which the optical adhesive layer 130 is located on the upper and lower sides of the first cover plate 120. Further, the optical adhesive layer 130 includes an optical adhesive end 131 and an optical adhesive middle portion 132, along the light emitting direction Y of the display panel 110, the optical adhesive end 131 at least partially overlaps the first cover plate end 121, the optical adhesive middle portion 132 at least partially overlaps the first cover plate middle portion 122, the electrical connection between the first cover plate end 121 and other film layers is achieved through the optical adhesive end 131, and the electrical connection between the first cover plate middle portion 122 and other film layers is achieved through the optical adhesive middle portion 132. Further, in the optical adhesive, the elastic modulus, the curing degree and the average molecular weight are positively correlated, and the elastic modulus is negatively correlated with the light transmittance, that is, the larger the elastic modulus, the larger the curing degree and the larger the average molecular weight, but the smaller the light transmittance. The elastic modulus of the optical cement in the optical cement end part 131 is set to be larger than that of the optical cement in the optical cement middle part 132, so that on one hand, the optical cement end part 131 with the larger elastic modulus can be used for well protecting the first cover plate end part 121, and the problem of angle collapse of the first cover plate end part 121 is avoided; on the other hand, the light transmission effect of the optical cement middle part 132 with smaller elastic modulus is guaranteed to be good. Since the optical adhesive intermediate portions 132 are all located in the display area of the display panel 110, the overall display effect of the display device 100 can be ensured to be good. It should be noted that, the specific elastic modulus value in the optical adhesive middle portion 132 is not limited in the embodiment of the present invention, and only the optical adhesive middle portion 132 needs to be ensured to have a good creep recovery and adhesion performance basis, so that bending performance is ensured not to be lost.
Further, as further shown with continued reference to fig. 1 and 2, the optical cement end 131 may further include an optical cement first end 1311 and an optical cement second end 1312, with the optical cement middle 132 being located between the optical cement first end 1311 and the optical cement second end 1312 along the first direction X. The optical adhesive first end 1311 and the optical adhesive second end 1312 have a relatively large elastic modulus, and can protect the first cover plate 120 from different ends of the first cover plate 120, so as to ensure that the protection effect of the first cover plate 120 is good.
The first cover end 121 and the first cover middle 122 are in direct contact with no dividing line therebetween, and the dividing line between the first cover end 121 and the first cover middle 122 is shown in the drawing by a broken line for the purpose of illustrating the concept of the first cover end 121 and the first cover middle 122 only. Similarly, the optical cement end portion 131 and the optical cement middle portion 132 are in direct contact without a boundary therebetween, and the boundary between the first cover plate end portion 121 and the first cover plate middle 122 is shown in the drawing by a broken line for the purpose of illustrating the concept of the optical cement end portion 131 and the optical cement middle portion 132 only.
In summary, in the display device provided by the embodiment of the invention, the first cover plate is provided with the first cover plate end part and the first cover plate middle part which are connected with each other, the optical adhesive layer comprises the optical adhesive end part and the optical adhesive middle part, the thickness of the first cover plate end part is further provided to be smaller than that of the first cover plate middle part, and burrs and cracks generated in the cutting process of the first cover plate end part are eliminated by thinning the first cover plate end part; the optical adhesive layer is further arranged to comprise an optical adhesive end part and an optical adhesive middle part, wherein the first cover plate end part and the optical adhesive end part are overlapped, the first cover plate middle part and the optical adhesive middle part are overlapped, and meanwhile, the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive middle part, so that good adhesion effects of different areas can be ensured, and good protection effects of the optical adhesive end part and good light transmission effects of the optical adhesive middle part can be ensured.
On the basis of the above embodiment, fig. 3 is a schematic diagram of the thinning process of the end portion of the first cover plate according to the embodiment of the present invention, as shown in fig. 3, in the large plate cutting process, burrs or microcracks may exist on the end portion of the first cover plate, and the untreated first cover plate 012 may be glued with special glue 011 and placed in two corrosion-resistant clamping plates 013. The first cover plate 012, including untreated, special glue 011 and corrosion-resistant clamp plate 013, is placed in corrosion solution 014, wherein special glue 011 is more easily corroded by corrosion solution 014 than untreated first cover plate 012, and the corrosion rate of special glue 011 is fast. The first cover plate 120 can be obtained by placing the corroded first cover plate 012, the special glue 011 and the corrosion-resistant clamp plate 013 in the special glue removal solution 015 and removing the special glue 011, wherein the thickness of the end 121 of the first cover plate is smaller than the thickness of the middle 122 of the first cover plate. Thus, burrs and cracks generated during the cutting process are removed by thinning the thickness of the first cap plate end 121.
On the basis of the above embodiments, a specific arrangement of the optical adhesive layer will be described below.
Referring to fig. 1 and 2, the optical cement layer 130 includes a first optical cement layer 130A; along the light emitting direction of the display panel 110, the first optical adhesive layer 130A is located between the display panel 110 and the first cover plate 120.
The first optical adhesive layer 130A is disposed between the display panel 110 and the first cover plate 120, and is used for bonding between the display panel 110 and the first cover plate 120, and protecting the display panel 110 by the first cover plate 120.
Further, as shown in fig. 1 and 2, the display device 100 further includes a polarizer 140 disposed between the display panel 110 and the first optical adhesive 130A, where the first optical adhesive 130A may be specifically used for bonding between the polarizer 140 and the first cover 120, and the polarizer 140 is used for preventing external light from affecting the display effect of the display device 100.
With continued reference to fig. 1, the optical cement layer 130 further includes a second optical cement layer 130B; along the light emitting direction of the display panel 110, the second optical adhesive layer 130B is located on the first cover plate 110; the display device 100 includes a second cover plate 150; along the light emitting direction of the display panel 110, the second cover 150 is located above the second optical adhesive layer 130B.
As shown in fig. 1, the display device 100 according to the embodiment of the present invention further includes a second cover plate 150, and the second optical adhesive layer 130B is used to implement adhesion between the first cover plate 120 and the second cover plate 150. The second cover 150 is used for packaging the display device 100, and may be a polyethylene cover, which is not limited in the embodiment of the present invention.
Referring to fig. 2, a side surface of the second optical cement layer end portion 131B remote from the first cover plate 120 is flush with a side surface of the second optical cement layer middle portion 132B remote from the first cover plate 120.
The display device 100 includes a first optical adhesive layer 130A and a second optical adhesive layer 130B, wherein the second optical adhesive layer 130B covers the first cover plate 120. The second optical adhesive layer end 131B is away from the first cover plate 120 and the second optical adhesive layer middle 132B is away from the first cover plate 120 and is flush with the first cover plate 120, that is, the thicknesses of the first cover plate 120 and the optical adhesive layer 130 are consistent with each other in each region, on one hand, the lamination with other film layers is facilitated, on the other hand, the integral structure formed by the first cover plate 120 and the optical adhesive layer 130 is regular, the stress is uniform in the subsequent bending process, and the bending property is good.
Fig. 4 is an enlarged schematic view of a region B of the display device shown in fig. 1, and as shown in fig. 4, the first cover 120 is symmetrical about a first symmetry plane a, and the first symmetry plane a is parallel to a plane of the display panel 110.
As shown in fig. 1 and 4, the first cover plate 120 is a symmetrical structure, and is symmetrical about a first symmetry plane a, which passes through the center of the first cover plate 120 and is parallel to the plane of the display panel 110. Through setting up first apron 120 for the structure about first symmetry plane A symmetry, guarantee that first apron 120 structure is regular, no matter buckle towards the upper surface of first apron 120 or buckle towards the lower surface of first apron 120 at display device bending process, the bending stress that first apron 120 received is the same, guarantees that display device's bendable effect is good.
On the basis of the above embodiment, the first optical cement layer 130A and the second optical cement layer 130B are symmetrical along the first symmetry plane. On the one hand, the first optical adhesive layer 130A and the second optical adhesive layer 130B are guaranteed to have the same adhesion effect and protection effect on the first cover plate 120, and on the other hand, the first cover plate 120 is guaranteed to have the same adhesion effect with the film layer below the first optical adhesive layer 130A and the film layer above the second optical adhesive layer 130B. Further, in the bending process of the display device, no matter the optical adhesive layer is bent towards the upper surface of the first cover plate 120 or towards the lower surface of the first cover plate 120, the bending stress of the optical adhesive layer is the same, so that the good bending effect of the display device is ensured.
With continued reference to fig. 1, 2 and 4, the optical adhesive end 131 covers the first cover end 121 in the light emitting direction of the display panel 110, that is, along the light emitting direction Y of the display panel, the vertical projection of the optical adhesive end 131 on the plane of the display panel 110 covers the vertical projection of the first cover end 121 on the plane of the display panel 110, so that the optical adhesive end 131 can fully protect the first cover end 121.
On the basis of the above-described embodiment, as shown with continued reference to fig. 1, 2 and 4, the optical cement end portion 131 is directed in the direction of the optical cement intermediate portion 132, and the elastic modulus of the optical cement in the optical cement end portion 131 gradually decreases. On the one hand, the elastic modulus of the optical cement end part 131 far from the optical cement middle part 132 is larger, so that the protection effect on the first cover plate end part 121 is good; on the other hand, the optical cement end portion 131 has a smaller elastic modulus and a larger light transmittance near the optical cement middle portion 132, so that a good light emitting effect of the display device 100 is ensured. Further, since the elastic modulus of the optical cement in the optical cement end portion 131 is greater than the elastic modulus of the optical cement in the optical cement middle portion 132, the direction of the optical cement end portion 131 pointing to the optical cement middle portion 132 is set at the same time, the elastic modulus of the optical cement in the optical cement end portion 131 is gradually reduced, the difference of the elastic modulus at the joint of the optical cement end portion 131 and the optical cement middle portion 132 is not obvious, the curing degree is uniform, the bonding effect, the protection effect and the light emitting effect are uniform, obvious boundaries appear in different, and the display device 100 is packaged integrally and has good display effect.
With continued reference to FIG. 4, the optical cement middle portion 132 is directed in the direction of the optical cement end portion 131, and the extension length L1 of the optical cement end portion 131 satisfies 50 μm.ltoreq.L1.ltoreq.100 μm.
For example, the specific extension length L1 of the optical cement end 131 may be adjusted according to the length of the first cover end 121, so as to better protect the first cover end 131 by the optical cement end 131. Specifically, the extension length L1 of the optical cement end 131 can be set to be 50 μm or less and L1 or less and 100 μm or less, which is matched with the existing preparation process of the first cover plate end 121, and the first cover plate end 121 can be completely, sufficiently and better protected on the basis of ensuring the simple preparation process of the first cover plate end 121.
Fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention, where, as shown in fig. 5, the display device 100 further includes an additional optical adhesive structure 133 located at an optical adhesive end portion 131 away from the optical adhesive middle portion 132; the additional optical cement structure 133 wraps the sidewall of the first cover end 121.
Illustratively, as shown in fig. 5, the additional optical cement structure 133 is located at a position of the optical cement end portion 131 away from the optical cement middle portion 132 and covers the sidewall of the first cover plate end portion 121, protecting the sidewall of the first cover plate end portion 121 from damage. The drawing is only to illustrate the concept of the additional optical structure 133 and the optical cement end 131, and the boundary between the additional optical structure 133 and the optical cement end 131 is shown with a broken line in the drawing. The attachment optical structure 133 may be prepared separately from the optical cement layer 130 or may be prepared integrally. Further, better and more comprehensive protection of the first cover plate end 121 may be achieved by the optical cement end 131 and the additional optical cement structure 133.
With continued reference to fig. 5, along the direction in which the optical cement end 131 points to the optical cement middle 132, the elastic modulus of the optical cement in the additional optical cement structure 133 is a fixed value, and the elastic modulus of the optical cement in the additional optical cement structure 133 is greater than the elastic modulus of the optical cement in the optical cement end 131.
The additional optical structure 133 covers the side wall of the first cover end 121, and there is no specific requirement for light transmittance, so the additional optical structure 133 may have a higher elastic modulus and a higher curing degree, and ensure good protection effect on the side wall of the first cover end 121. Further, the elastic modulus of the optical adhesive in the additional optical adhesive structure 133 is a fixed value, that is, the elastic modulus of different positions in the additional optical adhesive structure 133 is the same, and the protection effects of different positions are the same, so that each position of the side wall of the end portion 121 of the first cover plate can be well protected.
With continued reference to fig. 5, the additional optical cement structure 133 is integrally disposed with the optical cement layer 130, and the elastic modulus of the optical cement in the additional optical cement structure 133 and the optical cement layer 130 integrally disposed is gradually reduced along the direction in which the additional optical cement structure 133 points to the optical cement layer 130.
Illustratively, the integration of the additional optical cement structure 133 with the optical cement layer 130 may be better implemented during the manufacturing process. Meanwhile, the elastic modulus of the optical cement in the additional optical cement structure 133 and the optical cement layer 130 is gradually reduced along the direction of the additional optical cement structure 133 pointing to the optical cement layer 130, so that on one hand, the curing process is simple, the curing design space is larger, the requirement on the curing precision is reduced, and the curing process is simple. And the other part, along the direction that the additional optical cement structure 133 points to the optical cement layer 130, the light transmittance of the optical cement in the additional optical cement structure 133 and the optical cement layer 130 is gradually improved, so that the light emitting effect and the display effect of the display device are improved.
On the basis of the above embodiment, fig. 6 is an enlarged schematic view of the region C in the display device shown in fig. 5, and as shown in fig. 6, the distance L2 between the edge of the first cover plate end portion 121 on the side far from the first cover plate middle portion 122 and the edge of the additional optical adhesive structure 133 on the side far from the optical adhesive end portion 131 along the direction in which the optical adhesive middle portion 132 is directed to the optical adhesive end portion 131 satisfies that L2 is 100 μm and L2 is 200 μm.
For example, along the direction in which the optical cement middle portion 132 points to the optical cement end portion 131, the distance L2 between the edge of the first cover plate end portion 121 on the side far from the first cover plate middle portion 122 and the edge of the additional optical cement structure 133 on the side far from the optical cement end portion 131 satisfies that L2 is less than or equal to 100 μm and less than or equal to 200 μm, along the direction in which the optical cement middle portion 132 points to the optical cement end portion 131, the thickness L2 of the additional optical cement structure 133 satisfies that L2 is less than or equal to 100 μm and less than or equal to 200 μm, and by reasonably setting the thickness of the additional optical cement structure 133, the protection effect on the first cover plate end portion 121 can be ensured to be good, and on the one hand, the preparation process of the additional optical cement structure 133 is matched with the preparation process of the additional optical cement structure 133, and the preparation process of the additional optical cement structure 133 is ensured to be simple.
With continued reference to fig. 5 and 6, the minimum extension length of the additional optical adhesive structure 133 is L3 along the direction in which the optical adhesive intermediate portion 132 points toward the optical adhesive end portion 131; along the light emitting direction of the display panel 110, the minimum extension length of the optical cement end 131 is L4; wherein l3=l4.
For example, the minimum extension length of the additional optical cement structure 133 is equal to the minimum extension length of the optical cement end 131, which can have the same or similar protection effect on the side wall and the surface of the first cover plate end 121, so as to ensure good protection effect on the first cover plate 120; the minimum extension length of the additional optical cement structure 133 is equal to the minimum extension length of the optical cement end 131, so that good bending effect of the optical cement layer 130 can be ensured.
Referring to fig. 1, 2, and 4 to 6, the optical adhesive layer 130 is integrally provided with the first cover plate 120.
The optical adhesive layer 130 and the first cover plate 120 are integrally disposed, for example, the optical adhesive layer 130 may be formed by coating and curing the surface of the first cover plate 120, so that prestress generated when the optical adhesive layer 130 and the first cover plate 120 are separately disposed and attached can be avoided, good bonding effect of the optical adhesive layer 130 and the first cover plate 120 is ensured, the risk of separation when the display device is bent is small, and the bending performance of the display device is improved.
Referring to fig. 2 to 6, the thickness of the first cover plate 120 is less than or equal to 100 μm in the light emitting direction of the display panel 110.
The thickness of the first cover plate 120 is less than or equal to 100 μm, i.e., the first cover plate 120 is an ultrathin bendable cover plate, for example, may be ultrathin flexible glass, so as to improve the bendable performance of the display device 100, and facilitate implementation of the bendable display device.
Fig. 7 is a top view of an optical adhesive layer according to an embodiment of the invention, as shown in fig. 7, the display device 100 includes a bending axis D; the modulus of elasticity of the optical cement in the optical cement end portions 131 at least at the positions E and F at both ends of the bending axis D is greater than the modulus of elasticity of the optical cement in the optical cement intermediate portion 132.
Illustratively, as shown in fig. 7, the display device 100 includes a bending axis D at which the bending effect of the display device 100 is achieved. For example, since the stress on the optical adhesive layer at the bending axis D is the greatest, the elastic modulus of the optical adhesive in the optical adhesive end 131 at the positions E and F of the two ends of the bending axis D may be at least set to be greater than the elastic modulus of the optical adhesive in the optical adhesive middle 132, so that the stress on the bending axis D may be relieved, the bending effect of the display device 100 may be ensured, and the service life of the display device 100 may be prolonged.
It should be noted that, besides the elastic modulus of the optical adhesive in the optical adhesive end portions 131 located at the two ends of the bending axis D is greater than the elastic modulus of the optical adhesive in the optical adhesive middle portion 132, the elastic modulus of the optical adhesive in the optical adhesive end portions 131 outside the bending axis D may be greater than the elastic modulus of the optical adhesive in the optical adhesive middle portion 132, that is, the optical adhesive end portions 131 all have a greater elastic modulus, so as to ensure good protection of the first cover plate end portion.
Based on the same inventive concept, the embodiment of the present invention further provides a method for manufacturing a display device, and fig. 8 is a schematic flow chart of the method for manufacturing a display device provided by the embodiment of the present invention, as shown in fig. 8, where the method for manufacturing a display device provided by the embodiment of the present invention includes:
s110, providing a display panel.
The display panel may be an organic light emitting display panel or other types of display panels, for example, and embodiments of the present invention are not limited thereto.
S120, preparing a first cover plate and an optical adhesive layer on the light-emitting side of the display panel, wherein the optical adhesive layer is positioned on at least one side of the first cover plate along the light-emitting direction of the display panel; the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other along a first direction, the first cover plate middle part is positioned at one side of the first cover plate end part, which is close to the center of the first cover plate, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the first direction is parallel to the plane of the display panel; the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, and the optical adhesive middle part is positioned at one side of the optical adhesive end part, which is close to the center of the optical adhesive layer; along the light emitting direction of the display panel, the optical adhesive end part at least partially overlaps with the first cover plate end part, the optical adhesive middle part at least partially overlaps with the first cover plate middle part, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part.
Illustratively, the first cover plate may have a bendable characteristic and may be ultra-thin flexible glass or other flexible material. The thickness of the end part of the first cover plate is thinned, burrs and cracks generated in the cutting process of the end part of the first cover plate are eliminated, meanwhile, optical cement with different elastic moduli is respectively bonded with the end part of the first cover plate and the middle part of the first cover plate, and the end part of the first cover plate is well protected while good bonding effect is ensured. The display device and the first cover plate are arranged in parallel on the plane, so that the display device can be guaranteed to be attached to other film layers, and the attaching effect is good.
In summary, according to the manufacturing method of the display device provided by the embodiment of the invention, the first cover plate is provided with the first cover plate end part and the first cover plate middle part which are connected with each other, the thickness of the first cover plate end part is further provided to be smaller than that of the first cover plate middle part, and burrs and cracks generated in the cutting process of the first cover plate end part are eliminated by thinning the first cover plate end part; the optical adhesive layer is further arranged to comprise an optical adhesive end part and an optical adhesive middle part, wherein the first cover plate end part and the optical adhesive end part are overlapped, the first cover plate middle part and the optical adhesive middle part are overlapped, and meanwhile, the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive middle part, so that good adhesion effects of different areas can be ensured, and good protection effects of the optical adhesive end part and good light transmission effects of the optical adhesive middle part can be ensured.
Optionally, preparing a package structure on a light emitting side of the display panel, including:
providing a first cover plate;
coating optical glue on at least one side of the first cover plate;
and curing the optical cement glue to obtain the optical cement layer.
The optical glue is coated on the upper side of the first cover plate, or the optical glue is coated on the lower side of the first cover plate, or the optical glue is coated on the upper side and the lower side of the first cover plate. And obtaining the optical adhesive layer by the coated optical adhesive after curing. And preparing the integrated first cover plate and optical adhesive layer by coating optical adhesive and then curing. Different from the form of laminating optical cement and first apron laminating among the prior art, avoid producing prestressing force, optical cement is stretched when can not appear buckling simultaneously, leads to the phenomenon of being peeled off between optical cement and the first apron.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. Those skilled in the art will appreciate that the invention is not limited to the specific embodiments described herein, and that features of the various embodiments of the invention may be partially or fully coupled or combined with each other and may be co-operated and technically driven in various ways. Various obvious changes, rearrangements, combinations and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (17)
1. The display device is characterized by comprising a display panel and a first cover plate positioned on the light emitting side of the display panel, wherein an optical adhesive layer is arranged on at least one side of the first cover plate along the light emitting direction of the display panel;
the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other along a first direction, the first cover plate middle part is positioned at one side of the first cover plate end part, which is close to the center of the first cover plate, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the first direction is parallel to the plane where the display panel is located;
the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, and the optical adhesive middle part is positioned at one side of the optical adhesive end part, which is close to the center of the optical adhesive layer; the optical adhesive end part at least partially overlaps with the first cover plate end part along the light emitting direction of the display panel, the optical adhesive middle part at least partially overlaps with the first cover plate middle part, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part;
the optical adhesive layer comprises a first optical adhesive layer;
the first optical adhesive layer is positioned between the display panel and the first cover plate along the light emitting direction of the display panel;
the optical adhesive layer further comprises a second optical adhesive layer;
the second optical adhesive layer is positioned on the first cover plate along the light emitting direction of the display panel;
the display device includes a second cover plate; and the second cover plate is positioned above the second optical adhesive layer along the light emitting direction of the display panel.
2. The display device of claim 1, wherein a side surface of the second optical adhesive layer end portion remote from the first cover plate is flush with a side surface of the second optical adhesive layer intermediate portion remote from the first cover plate.
3. The display device of claim 2, wherein the first cover plate is symmetrical about a first plane of symmetry that is parallel to a plane in which the display panel lies.
4. A display device as claimed in claim 3, characterized in that the first and second optical glue layers are symmetrical along the first plane of symmetry.
5. The display device according to claim 1, wherein the optical cement end portion covers the first cover plate end portion in a light-emitting direction of the display panel.
6. The display device according to claim 1, wherein an elastic modulus of the optical paste in the optical paste end portion gradually decreases in a direction in which the optical paste end portion is directed toward the optical paste middle portion.
7. The display device according to claim 1, wherein an extension length L1 of the optical adhesive end portion satisfies 50 μm and L1 and 100 μm along a direction in which the optical adhesive intermediate portion is directed toward the optical adhesive end portion.
8. The display device of claim 1, further comprising an additional optical cement structure located at an end of the optical cement away from the middle of the optical cement;
the additional optical cement structure wraps the side wall of the end portion of the first cover plate.
9. The display device according to claim 8, wherein an elastic modulus of the optical paste in the additional optical paste structure is a fixed value along a direction in which the optical paste end portion is directed toward the optical paste middle portion, and the elastic modulus of the optical paste in the additional optical paste structure is larger than that of the optical paste in the optical paste end portion.
10. The display device according to claim 8, wherein the additional optical cement structure is integrally provided with the optical cement layer, and the elastic modulus of the optical cement in the additional optical cement structure and the optical cement layer integrally provided is gradually reduced along the direction in which the additional optical cement structure is directed toward the optical cement layer.
11. The display device according to claim 8, wherein a distance L2 between an edge of the first cover plate end portion on a side away from the first cover plate intermediate portion and an edge of the additional optical adhesive structure on a side away from the optical adhesive end portion along a direction in which the optical adhesive intermediate portion is directed toward the optical adhesive end portion satisfies 100 μm and L2 and 200 μm.
12. The display device of claim 8, wherein the minimum extension length of the additional optical adhesive structure is L3 along the direction in which the optical adhesive middle points to the optical adhesive end;
the minimum extension length of the end part of the optical cement is L4 along the light emitting direction of the display panel;
wherein l3=l4.
13. The display device of claim 1, wherein the optical glue layer is integrally disposed with the first cover plate.
14. The display device according to claim 1, wherein a thickness of the first cover plate is less than or equal to 100 μm in a light-emitting direction of the display panel.
15. The display device of claim 1, wherein the display device comprises a bending axis;
the elastic modulus of the optical cement in the optical cement end parts at least at the two ends of the bending shaft is larger than that of the optical cement in the optical cement middle part.
16. A method of manufacturing a display device, comprising:
providing a display panel;
preparing a first cover plate and an optical adhesive layer on the light-emitting side of the display panel, wherein the optical adhesive layer is positioned on at least one side of the first cover plate along the light-emitting direction of the display panel; the first cover plate comprises a first cover plate end part and a first cover plate middle part which are connected with each other along a first direction, the first cover plate middle part is positioned at one side of the first cover plate end part, which is close to the center of the first cover plate, and the thickness of the first cover plate middle part is larger than that of the first cover plate end part; the first direction is parallel to the plane where the display panel is located; the optical adhesive layer comprises an optical adhesive end part and an optical adhesive middle part, and the optical adhesive middle part is positioned at one side of the optical adhesive layer end part, which is close to the center of the optical adhesive layer; the optical adhesive end part at least partially overlaps with the first cover plate end part along the light emitting direction of the display panel, the optical adhesive middle part at least partially overlaps with the first cover plate middle part, and the elastic modulus of the optical adhesive in the optical adhesive end part is larger than that of the optical adhesive in the optical adhesive middle part; wherein the optical adhesive layer comprises a first optical adhesive layer; the first optical adhesive layer is positioned between the display panel and the first cover plate along the light emitting direction of the display panel; the optical adhesive layer further comprises a second optical adhesive layer; the second optical adhesive layer is positioned on the first cover plate along the light emitting direction of the display panel; the display device includes a second cover plate; and the second cover plate is positioned above the second optical adhesive layer along the light emitting direction of the display panel.
17. The method of manufacturing of claim 16, wherein manufacturing the package structure on the light-emitting side of the display panel comprises:
providing a first cover plate;
coating optical glue on at least one side of the first cover plate;
and curing the optical glue to obtain the optical glue layer.
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