WO2019205031A1

WO2019205031A1 - Cover plate, display device, and method for manufacturing cover plate

Info

Publication number: WO2019205031A1
Application number: PCT/CN2018/084493
Authority: WO
Inventors: 毕广洪
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-04-25
Filing date: 2018-04-25
Publication date: 2019-10-31
Also published as: CN112020780A

Abstract

A cover plate (10, 20, 30, 40, 50, 60), a flexible display device (100), and a method for manufacturing the cover plate (10, 20, 30, 40, 50, 60). The cover plate (10, 20, 30, 40, 50, 60) comprises a cover plate substrate (11, 21, 31, 41, 51, 61) and a polarized structure (13, 23, 33, 43, 53, 63) provided at one side thereof for reducing reflection of light. The polarized structure (13, 23, 33, 43, 53, 63) is directly formed on the cover plate substrate (11, 21, 31, 41, 51, 61) of the cover plate (10, 20, 30, 40, 50, 60) so that a substrate of a traditional polarizer sheet is saved, the polarized structure is thin and flexible, and the bending performance of the cover plate (10, 20, 30, 40, 50, 60) is improved.

Description

Cover plate, display device and cover plate manufacturing method

Technical field

The present invention relates to the field of display technologies, and in particular, to a cover, a display device, and a method of manufacturing a cover.

Background technique

The polarizing structure is an important component in the display device for reducing reflection of external light to improve the display effect of the display device. A polarizer attached to the outside of the display module is generally employed as the polarizing structure, but such a polarizing structure has a large thickness, so that the thickness of the display device becomes large, thereby making the display device thick.

Summary of the invention

In order to solve the above problems, embodiments of the present invention disclose a cover, a flexible display device, and a method of manufacturing a cover.

A cover plate includes a cover substrate and a polarizing structure disposed on a side of the cover substrate, wherein the polarizing structure is used to reduce reflection of light.

Further, the polarizing structure includes a linear polarizing layer disposed on one side of the cover substrate.

Further, the polarizing structure further includes a first alignment layer disposed between the linear polarizing layer and the cover substrate, wherein the first alignment layer is configured to orient the materials contained in the linear polarizing layer.

Further, the first alignment layer is oriented to align the internal substances of the first alignment layer by polarized ultraviolet light irradiation.

Further, the material contained in the linear polarizing layer is aligned by the side chain of the internal substance of the first alignment layer by the irradiation of the non-polarized ultraviolet light.

Further, the polarizing structure further includes a first compensation layer, the linear polarizing layer is disposed adjacent to the cover substrate, and the first compensation layer is disposed on the linear polarizing layer away from the cover substrate One side.

Further, the polarizing structure further includes a second alignment layer disposed between the linear polarizing layer and the first compensation layer.

Further, the second alignment layer is oriented by polarized ultraviolet light to align the internal substances of the second alignment layer, and the material contained in the first compensation layer is irradiated by the non-polarized ultraviolet light and the second orientation The internal materials of the layer are oriented by side chains.

Further, the polarizing structure further includes a first adhesive layer, and the first adhesive layer is bonded between the linear polarizing layer and the first compensation layer.

Further, the cover is a flexible cover.

Further, the cover substrate comprises a visible area and an occlusion area, the polarizing structure is distributed in the visible area, the cover plate further comprises a shielding layer, and the shielding layer is disposed on the cover substrate Occlusion area.

A display device includes the cover plate and the display module as described above, and the cover plate and the display module are stacked.

Further, the display module includes a touch layer and a display layer, the touch layer is disposed between the cover and the display layer, and the flexible display device further includes an optical adhesive layer, and the touch A side of the layer away from the display layer is attached to the polarizing structure through the optical adhesive layer.

Further, the display module is a flexible display module.

A method of manufacturing a cover plate, the manufacturing method comprising:

Providing a cover plate including a cover substrate;

A polarizing structure is formed on one side of the cover substrate.

Further, the polarizing structure includes a first alignment layer, and forming a polarizing structure on one side of the cover substrate comprises: forming the first alignment layer on one side of the cover substrate.

Further, the first alignment layer is oriented to align the internal substances of the first alignment layer by irradiation of polarized ultraviolet light during formation.

Further, the polarizing structure further includes a linear polarizing layer, and forming the polarizing structure on one side of the cover substrate further comprises: forming the linear polarizing layer on one side of the first alignment layer.

Further, the linearly polarizing layer is irradiated by the non-polarized ultraviolet light during the formation process, so that the material of the linearly polarized light and the internal substance of the first alignment layer generate a side chain to be aligned.

Further, the polarizing structure further includes a second alignment layer and a first compensation layer, and forming a polarization structure on one side of the cover substrate further comprises: forming an internal substance by polarized ultraviolet light irradiation on one side of the linear polarization layer Orienting the second alignment layer; forming a first compensation layer in which the internal liquid crystal material is aligned by irradiation of non-polarized ultraviolet light on one side of the second alignment layer.

Further, the “forming a polarizing structure on one side of the cover substrate” includes: covering a side surface of the cover substrate with a mask, the mask including the hollow region and the non-hollow region And the hollow area corresponds to a visible area of the cover substrate, and the polarized structure is formed in the hollow area.

Further, the “forming a polarizing structure on one side of the cover substrate” includes: forming a prefabricated polarizing structure on one side of the cover substrate, the prefabricated polarizing structure covering the entire cover substrate The prefabricated polarizing structure is exposed, developed, and etched by a photomask having a pre-patterned pattern to form the polarizing structure in a visible region of the cover substrate.

Further, the “forming a polarizing structure on one side of the cover substrate” includes: forming a compensation layer by coating the compensation layer material on the substrate, and attaching the compensation layer to the polarized light through the adhesive layer On the functional layer adjacent to it in the structure.

The cover plate, the display device and the cover plate manufacturing method provided by the invention have the polarizing structure formed directly on the cover substrate of the cover plate, thereby eliminating the substrate of the conventional polarizer, and having the characteristics of lightness and thinness, and being improved. The bending performance of the cover. In addition, when the polarizing structure is damaged, the cover can be directly replaced, which is convenient for use.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic cross-sectional view of a cover plate according to a first embodiment of the present invention.

Figure 1a is a schematic plan view of the cover plate of Figure 1.

2 is a schematic cross-sectional view of a cover plate according to a second embodiment of the present invention.

3 is a schematic cross-sectional view of a cover plate according to a third embodiment of the present invention.

4 is a schematic cross-sectional view of a cover plate according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of a cover plate according to a fifth embodiment of the present invention.

6 is a schematic cross-sectional view of a cover plate according to a sixth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a flexible display device according to an embodiment of the present invention.

FIG. 8 is a flow chart of a method of manufacturing a cover plate according to an embodiment of the present invention.

Figure 9 is a plan view of a mask.

Figure 10 is a flow diagram of step 802 of Figure 8 in an embodiment.

11 is a flow chart of a method of manufacturing a cover plate according to an embodiment of the present invention.

Figure 12 is a schematic illustration of the structure formed in step 901.

Figure 13 is a schematic illustration of the structure formed in step 902.

Figure 14 is a schematic illustration of the structure formed in step 903.

Figure 15 is a schematic illustration of the structure formed in step 904.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, a first embodiment of the present invention provides a cover 10 applied to a display device. In the present embodiment, the cover 10 includes a cover substrate 11 and a polarizing structure 13 disposed on one side of the cover substrate 11. The polarizing structure 13 serves to reduce reflection of external light to improve the display quality of the display device. In the embodiment, the cover 10 is a flexible cover, that is, the cover substrate 11 and the polarizing structure 13 are both flexible materials. It can be understood that the cover 10 can also be a rigid cover.

In a specific embodiment, the polarizing structure 13 includes a plurality of functional layers 130, and the plurality of functional layers 130 include a first alignment layer 131, a linear polarization layer 133, a second alignment layer 134, and a first layer. Compensation layer 135. In the present embodiment, the first compensation layer 135 is a λ/4 wave plate, and λ can take an average value of visible light wavelengths, or can be set according to actual needs, and is not limited herein. The line polarizing layer 133 and the first compensation layer 135 each include a liquid crystal material. The first alignment layer 131 is for aligning the materials contained in the linear polarizing layer 133. The first compensation layer 135 is used to convert the linearly polarized light into circularly polarized light, and the first compensation layer 135 and the linearly polarizing layer 133 cooperate to eliminate the light, thereby reducing the reflection of external light and improving product visibility. The second alignment layer is used to orient the materials contained in the first compensation layer 135.

The material of the cover substrate 11 may be a material such as polyimide (PI), polymethyl methacrylate (PMMA), or glass. The material of the first alignment layer 131 and the second alignment layer 134 may be selected from the group consisting of polyimide, polyvinyl alcohol, cinnamamide, coumarin, azo compound, and the like. The material of the linear polarizing layer 133 may be selected from a material having a dichroic property such as a lyotropic liquid crystal, a dye, and a liquid crystal mixture. The material used for the first compensation layer 135 includes a liquid crystal material and a corresponding leveling agent and the like. The liquid crystal material may be a liquid crystal material such as a dish-shaped liquid crystal or a wire rod type liquid crystal. The liquid crystal material needs to be different according to the optical properties of the preparation compensation layer. Liquid crystals with different optical properties are selected and different orientation methods are selected.

It can be understood that, in an embodiment, the linear polarizing layer 133 and the first compensation layer 135 may be made of a material that does not include liquid crystal, such as polyvinyl alcohol, and the functional layer 130 includes a line polarizing layer 133 and a layer. A compensation layer 135 is disposed on a side of the linear polarizing layer 133 away from the cover substrate 11. Of course, the functional layer 130 may further include two or more compensation layers to improve the display quality of the display device by matching different compensation layers.

Further, referring to FIG. 1a, the cover 10 further includes a shielding layer 15. The shielding layer 15 is disposed on the cover substrate 11 and disposed around the polarizing structure 13 to define a visible region 113 and a shielding region 115 on the cover substrate 11 . In other words, the occlusion area 115 is disposed around the viewable area 113. The polarizing structure 13 is disposed on the visible region 113; the shielding layer 15 is disposed in the shielding region 115 for shielding the structure of the display device and the like, and/or for decorative effects. The thickness of the shielding layer 15 is substantially equal to the thickness of the polarizing structure 13. In the present embodiment, the shielding layer 15 is printed on the shielding region 115 of the cover substrate 11 by ink. The color of the occlusion layer 15 may be black, gold or a plurality of colors depending on the product requirements, and is not limited herein. It can be understood that the shielding layer 15 can be made of other light shielding materials, such as a light-tight adhesive layer; the shielding area 115 may not be disposed around the visible area 113; the thickness of the shielding layer 15 may be smaller than the thickness of the polarizing structure 13; The thickness of the shielding layer 15 may also be greater than the thickness of the polarizing structure 13.

Further, the cover 10 further includes a hard layer 17. The hard layer 17 is disposed on a side of the cover substrate 11 away from the polarizing structure 13 for protecting the cover 10 from being scratched, worn, broken, and the like. The hard layer 17 covers the visible region 113 of the cover substrate 11 and the occlusion region 115. In the present embodiment, the hard layer 17 is formed by applying a hard coat layer to one side of the cover substrate 11 away from the polarizing structure 13 to form a hard coating layer. It can be understood that the hard layer 17 can be a film layer having a certain hardness, thickness, wear resistance, and flexibility. The hard layer 17 is attached to the side of the cover substrate 11 away from the polarizing structure 13 through the adhesive layer.

When the cover 10 is manufactured, the material of the alignment layer is applied to the cover substrate 11 by screening and spin coating of the mask 201 (shown in FIG. 9). The mask 201 includes a hollow area 2011 and a non-hollow area 2013, wherein the hollow area 2011 corresponds to the visible area 113, the non-hollow area 2013 corresponds to the occlusion area 115, and the non-hollow area 2013 is the occlusion reserved area.

After evaporating the solvent at a certain temperature, the material of the alignment layer is aligned to form the first alignment layer 131 by irradiation with polarized ultraviolet (UV) light. According to different orientation layer materials, the heating temperature is as long as the curing temperature of the alignment layer material is satisfied, and the temperature range is 60-250 ° C. The polarized UV light irradiation band needs to satisfy the orderly alignment (i.e., orientation) of the alignment layer material. Depending on the material, the optional illumination range is 200-500 nm.

The material of the linearly polarizing layer is applied to the side of the first alignment layer 131 away from the cover substrate 11 by a method similar to the method of manufacturing the first alignment layer 131. After evaporating the solvent at a certain temperature and then irradiating with non-polarized UV light, the material of the linear polarizing layer is oriented by the van der Waals force, the conjugation effect, the hydrogen bonding, the steric hindrance and the like, and the side chain of the alignment layer material is oriented. Thereby, the linear polarizing layer 133 is formed. In other words, the material contained in the linear polarizing layer 133 is aligned by the side chain of the internal substance of the first alignment layer 131 by the irradiation of the non-polarized ultraviolet light. The temperature for heating can be selected from 50 to 180 ° C as long as the solvent is evaporated and the liquid crystal is maintained in the corresponding nematic or smectic phase. The UV light irradiation band ranges from 200 to 500 nm, and in the present embodiment, the UV light irradiation band is 365 nm.

A second alignment layer 134 is formed on the side of the line polarizing layer 133 away from the first alignment layer 131 by a method similar to the method of preparing the first alignment layer 131. Specifically, the alignment layer material is coated on the side of the in-line polarizing layer 133 away from the first alignment layer 131, and after evaporating the solvent at a certain temperature, the alignment layer material is sufficiently ordered by the polarized UV light irradiation, thereby forming the first Two alignment layers 134.

The orientation of the first alignment layer 131 and the second alignment layer 134 needs to have a certain inclination angle between the liquid crystal alignment of the first compensation layer 135 and the liquid crystal alignment of the linear polarization layer 133, so that the linear polarization is passed. The first compensation layer 135 then becomes circularly polarized. In the present embodiment, the orientation of the first alignment layer 131 and the second alignment layer 134 is determined by changing the polarization angle of the polarized UV light. It can be understood that the compensation layer, the linear polarizing layer and the alignment layer in the polarizing structure 13 are combined and combined to realize linear polarization after passing through the compensation layer 135.

In a similar manner to the preparation of the linear polarizing layer 133, a first compensation layer 135 is formed on the side of the second alignment layer 134 away from the linear polarizing layer 133. Specifically, the compensation layer material is coated on the side of the second alignment layer 134 away from the linear polarization layer 133, and after evaporating the solvent at a certain temperature, the first compensation layer 135 is formed by irradiation with unpolarized UV light. The material contained in the first compensation layer 135 is aligned by the side chain action of the internal material of the second alignment layer 134 by the irradiation of the unpolarized UV light.

In the shielding region 115 of the cover substrate 11, ink shielding is performed to form the shielding layer 15.

In one embodiment, in the preparation of the functional layer such as the first alignment layer 131 and the linear polarizing layer 133, a photopolymerizable reactive polyarylate can be used, a photomask region can be controlled by a photomask, and methanol can be used. The organic solvent etches the uncured portion covered by the photomask to form the polarizing structure 13 in the visible region 113 of the cover substrate 11. Thereafter, ink shielding is performed on the shielding region 115 of the cover substrate 11 to form the shielding layer 15.

In the embodiment, the polarizing structure 13 has a thickness ranging from 3 to 15 μm. Since the polarizing structure 13 is directly disposed on the cover substrate 11 of the cover 10, the substrate of the conventional polarizer is eliminated, and the light and thin flexible characteristics are obtained, and the bending performance of the cover 10 is improved. In addition, since the polarizing structure 13 is directly formed on the cover substrate 11, when the polarizing structure 13 is damaged, the cover 11 is directly replaced, which is convenient for use. In addition, the method of stretching polyvinyl alcohol (PVA) without using a conventional polarizer, using a dichroic molecular dyeing method, improves the weather resistance of the product of the cover 10. In addition, a circular polarizer is prepared by coating, and the thickness of the coated circular polarizer is very thin, which greatly reduces the overall thickness of the product.

Referring to FIG. 2 , the cover plate 20 provided by the second embodiment of the present invention is substantially the same as the structure of the cover plate 10 provided by the first embodiment. The polarizing structure 23 includes a first alignment layer 231 , a linear polarization layer 233 , and a second orientation. The layer 234 and the first compensation layer 235 are different in that the polarizing structure 23 further includes a third alignment layer 236 and a second compensation layer 237. The third alignment layer 236 of the polarizing structure 23 is disposed on the first compensation layer 235 and the second layer. Between the compensation layers 237, the first compensation layer 235 is disposed between the second alignment layer 234 and the third alignment layer 236; the first compensation layer 235 is a λ/2 wave plate, and the second compensation layer 237 is a λ/4 wave plate. . The first compensation layer 235 of the polarizing structure 23 is matched with the second compensation layer 237 to avoid the phenomenon of viewing angle limitation, color shift phenomenon or light leakage, thereby achieving a wide viewing angle, improving color shift, and reducing light leakage, thereby improving the display of the display device. quality. The line polarizing layer 233, the first compensation layer 235, and the second compensation layer 237 each include a liquid crystal material.

Referring to FIG. 3 , the cover plate 30 provided by the third embodiment of the present invention is substantially the same as the cover plate 20 provided by the second embodiment. The polarizing structure 33 includes a first alignment layer 331 , a linear polarization layer 333 , and a second orientation. The layer 334, the first compensation layer 335, the third alignment layer 336 and the second compensation layer 337 are different in that the polarization structure 33 further includes a fourth alignment layer 338 and a third compensation layer 339, and the fourth alignment layer 338 of the polarization structure 33. The second compensation layer 337 is disposed between the third alignment layer 336 and the fourth alignment layer 338; the first compensation layer 335 is a λ/2 wave plate. The second compensation layer 337 is a λ/4 wave plate, and the third compensation layer 339 is a C-plate. The first compensation layer 335 of the polarizing structure 33 is combined with the second compensation layer 337 and the third compensation layer 339 to further avoid the phenomenon of viewing angle limitation, color shift phenomenon or light leakage, thereby achieving a wide viewing angle, improving color shift, and reducing light leakage. .

Referring to FIG. 4 , the cover 40 provided by the fourth embodiment of the present invention is substantially the same as the cover 10 provided by the first embodiment. The polarizing structure 43 includes a first alignment layer 431 , a linear polarization layer 433 , and a first compensation. The layer 435, the polarizing structure 43 is different from the polarizing structure 13 in that the polarizing structure 43 does not include the second alignment layer, and the polarizing structure 43 includes the first adhesive layer 434. The first adhesive layer 434 is bonded to the linear polarizing layer 433 and the first compensation layer. Between layers 435. In this embodiment, the first adhesive layer 434 is a pressure sensitive adhesive (PSA). The first compensation layer 435 is a λ/4 wave plate.

When the cap plate 40 is manufactured, the first alignment layer 431 is formed on the cap substrate 41 by coating, and the linear polarizing layer 433 is formed on the first alignment layer 431. After the material of the first compensation layer 435 is coated on a substrate, a first compensation layer 435 is formed, and the first compensation layer 435 is attached to the on-line polarizing layer 433 through the first adhesive layer 434, in other words, A compensation layer 435 is attached to the in-line polarizing layer 433 by means of PSA transfer.

Since the first compensation layer 435 is attached to the in-line polarizing layer 433 through the first adhesive layer 434, the manufacturing process of the cover 40 is reduced, and the manufacturing efficiency of the cover 40 is improved.

Further, the cover plate 40 further includes a shielding layer 45 formed on the cover substrate 11 , and the shielding layer 45 is disposed around the first alignment layer 431 and the linear polarizing layer 433 of the polarizing structure 43 . The shielding layer 45 is formed in a receiving groove 451. The first alignment layer 431, the linear polarizing layer 433 and a portion of the first adhesive layer 434 are received in the receiving groove 451, and the first adhesive layer 434 is partially disposed on the shielding layer. The layer 45 is on the side away from the cover substrate 11. In other words, the first adhesive layer 434 is partially filled into the receiving groove 451, thereby filling the difference in thickness between the shielding layer 45 and the cover substrate 41, preventing ripples from occurring during bending.

Referring to FIG. 5 , the cover 50 provided by the fifth embodiment of the present invention is substantially the same as the cover 40 provided by the fourth embodiment. The polarizing structure 53 includes a first alignment layer 531 , a linear polarizing layer 533 , and a first adhesive. The layer 534 and the first compensation layer 535 are different in that the polarizing structure 53 further includes a second adhesive layer 536 and a second compensation layer 537, and the second adhesive layer 536 is bonded to the first compensation layer 535 and the first Between the two compensation layers 537. The first compensation layer 535 is a λ/2 wave plate, and the second compensation layer 537 is a λ/4 wave plate.

When the cover 50 is manufactured, the first alignment layer 531 is formed on the cover substrate 51 by coating, and the linear polarization layer 533 is formed on the first alignment layer 531. After the material of the compensation layer is coated on a substrate, a first compensation layer 535 is formed, and then attached to the on-line polarizing layer 533 through the first adhesive layer 534. The material of the compensation layer is coated on a substrate to form a second compensation layer 537, and the second compensation layer 537 is attached to the first compensation layer 535 through the second adhesive layer 536.

Further, the cover plate 50 further includes a shielding layer 55 formed on the cover substrate 51 , and the shielding layer 55 is disposed around the first alignment layer 531 and the linear polarizing layer 533 of the polarizing structure 53 . The shielding layer 55 is formed in a receiving groove 551. The first alignment layer 531, the linear polarizing layer 533 and a portion of the first adhesive layer 534 are received in the receiving groove 551, and the first adhesive layer 534 is partially disposed on the shielding layer. The layer 55 is on the side away from the cover substrate 51. In other words, the first adhesive layer 534 is partially filled into the receiving groove 551, so that the difference in thickness between the shielding layer 55 and the cover substrate 51 is filled, and ripples are prevented from occurring during bending.

Referring to FIG. 6 , the cover plate 60 provided by the sixth embodiment of the present invention is substantially the same as the cover plate 50 provided by the fifth embodiment. The polarizing structure 63 includes a first alignment layer 631 , a linear polarizing layer 633 , and a first glue. The layer 634, the first compensation layer 635, the third alignment layer 636, and the second compensation layer 637 are different in that the polarizing structure 63 further includes a third adhesive layer 638 and a third compensation layer 639, and the third adhesive layer 638 is bonded. The second compensation layer 637 is disposed between the second adhesive layer 637 and the third adhesive layer 638 between the second compensation layer 637 and the third compensation layer 639. The first compensation layer 635 is a λ/2 wave plate, the second compensation layer 637 is a λ/4 wave plate, and the third compensation layer 639 is a C plate.

When the cover 60 is manufactured, the first alignment layer 631 is formed on the cover substrate 61 by coating, and the linear polarization layer 633 is formed on the first alignment layer 631. After the material of the compensation layer is coated on a substrate, a first compensation layer 635 is formed, and the first compensation layer 635 is attached to the on-line polarizing layer 633 through the first adhesive layer 634. The material of the compensation layer is coated on a substrate to form a second compensation layer 637, and the second compensation layer 637 is attached to the first compensation layer 635 through the second adhesive layer 636. After the material of the compensation layer is coated on a substrate to form the third compensation layer 639, the third compensation layer 639 is attached to the second compensation layer 636 through the third adhesive layer 638.

Further, the cover plate 60 further includes a shielding layer 65 formed on the cover substrate 61, and the shielding layer 65 is disposed around the first alignment layer 631 and the linear polarizing layer 633 of the polarizing structure 63. The shielding layer 65 is formed in a receiving groove 651. The first alignment layer 631, the linear polarizing layer 633 and a portion of the first adhesive layer 634 are received in the receiving groove 651, and the first adhesive layer 634 is partially disposed on the shielding layer. The layer 65 is on the side away from the cover substrate 61. In other words, the first adhesive layer 634 is partially filled into the receiving groove 651, so that the difference in thickness between the shielding layer 65 and the cover substrate 61 is filled to prevent the occurrence of waviness during bending.

In summary, the polarizing structure includes at least one compensation layer, and the compensation layer may be at least one of a λ/4 wave plate, or a λ/2 wave plate, or other compensation film layers such as a C plate. It can be understood that the compensation layer and the linear polarizing layer do not include a liquid crystal material, and the polarizing structure may omit the alignment layer. In one embodiment, the compensation layer is attached to a functional layer adjacent to the polarizing structure by a glue layer, such as a linear polarizing layer. In other words, a compensation layer is formed by coating the compensation layer material on a substrate, and then the compensation layer is attached to the functional layer adjacent to the polarizing structure through the adhesive layer. In one embodiment, the compensation layer is formed by coating on a functional layer adjacent to the polarizing structure, such as a linear polarizing layer.

Referring to FIG. 7 , the present invention further provides a display device 100 including a stacked cover 70 and a display module 80 . The cover plate 70 is the cover plate 10 provided by the first embodiment, the cover plate 20 provided by the second embodiment, the cover plate 30 provided by the third embodiment, the cover plate 40 provided by the fourth embodiment, and the fifth embodiment One of the cover 50 provided and the cover 60 provided in the sixth embodiment. Further, the display module 80 includes a display layer 81 and a touch layer 83 which are stacked. The touch layer 83 is disposed between the display layer 81 and the cover 70. The display module 80 is a flexible display touch module. It can be understood that the display module 80 can omit the touch layer 83. In an embodiment, the display module 80 can be a rigid display module.

Further, the display device 100 further includes an optical adhesive layer 90. The side of the touch layer 83 away from the display layer 81 is attached to the polarizing structure of the cover plate 70 through the optical adhesive layer 90. .

Referring to FIG. 8 , the present invention also provides a method for manufacturing a cover plate, including:

Step 801, providing a cover plate including a cover substrate.

Step 802, forming a polarizing structure on one side of the cover substrate.

Step 803, forming a shielding layer on the cover substrate, the shielding layer being disposed around the polarizing structure.

Further, in step 802, a mask 201 (shown in FIG. 9) is disposed on one side of the cover substrate, and the mask 201 includes a hollow area 2011 and a non-hollow area 2013, and the hollowing out The area 2011 corresponds to the visible area of the cover substrate, and the polarizing structure is formed in the hollow area 2011. Referring to FIG. 10, step 802 specifically includes the following steps:

In step 8021, a mask is disposed on one side of the cover substrate, and the mask includes a hollowed out area and a non-hollowed area, and the hollowed out area corresponds to a visible area of the cover substrate.

Step 8022, forming a first alignment layer in the hollow region.

In this embodiment, in step 8022, an alignment layer material is coated on the hollow region, and after heating and polarizing UV illumination, a first alignment layer is formed in a visible region of the cover substrate, and the heating temperature range is At 60-250 ° C, the UV light irradiation range is 200-500 nm.

Step 8023, forming a linear polarizing layer on a side of the first alignment layer away from the cover substrate.

In this embodiment, in step 8023, a linear polarizing layer material is coated on a side of the first alignment layer away from the cover substrate, and after heating and non-polarized UV illumination, in the first alignment layer. The linear polarizing layer is formed on the heating temperature range of 50-180 ° C, and the UV light irradiation wavelength range is 200-500 nm, more preferably 365 nm.

Step 8024, forming a second alignment layer on a side of the line polarizing layer away from the first alignment layer.

In a manner similar to step 8022, an alignment layer material is coated on a side of the line polarizing layer away from the first alignment layer, and a second alignment layer is formed on the line polarizing layer by heating and polarizing UV illumination. .

Step 8025, forming a first compensation layer on a side of the second alignment layer away from the linear polarization layer.

In this embodiment, a compensation layer material is coated on a side of the second alignment layer away from the linear polarization layer, and a first compensation layer is formed on the second alignment layer after heating and non-polarized UV illumination.

It can be understood that, in an embodiment, in step 8025, the first compensation layer may be formed by coating a material of the compensation layer on a substrate, and then forming the first compensation layer through the first adhesive layer. On the second alignment layer.

Step 8026, forming a third alignment layer on a side of the first compensation layer away from the second alignment layer.

In a manner similar to step 8022, an alignment layer material is coated on a side of the first compensation layer away from the second alignment layer, and a third is formed on the first compensation layer by heating and polarizing UV illumination. Orientation layer.

Step 8027, forming a second compensation layer on a side of the third alignment layer away from the first compensation layer.

In a manner similar to step 8025, a compensation layer material is applied on a side of the third alignment layer away from the first compensation layer, and after heating and non-polarized UV illumination, a third formation layer is formed on the third alignment layer. Two compensation layers.

It can be understood that, in an embodiment, in step 8027, the second compensation layer may be formed by coating a material of the compensation layer on a substrate, and then passing the second compensation layer through the second adhesive layer. Formed on the third alignment layer.

Step 8028, forming a fourth alignment layer on a side of the second compensation layer away from the third alignment layer.

In an manner similar to step 8022, an alignment layer material is coated on a side of the second compensation layer away from the third alignment layer, and a fourth is formed on the second compensation layer by heating and polarizing UV illumination. Orientation layer.

Step 8029, forming a third compensation layer on a side of the fourth alignment layer away from the second compensation layer.

In a manner similar to step 8025, a compensation layer material is applied on a side of the fourth alignment layer away from the second compensation layer, and a fourth layer is formed on the fourth alignment layer by heating and non-polarized UV illumination. Three compensation layers.

It can be understood that, in an embodiment, in step 8029, the third compensation layer may be formed by coating the material of the compensation layer on the substrate, and then forming the third compensation layer through the third adhesive layer. On the third alignment layer.

It can be understood that step 8024, step 8026 - step 8029 are omitted.

It can be understood that the polarizing structure is not formed on the cover substrate by the mask 201, that is, in the specific step of step 802, the step 8021 can be omitted, and the step 802 includes the following steps: one of the cover substrates Forming the first alignment layer on one side; forming the linear polarization layer on one side of the first alignment layer; forming a second alignment layer on one side of the linear polarization layer, specifically, on the linear polarization layer One side is formed by polarized ultraviolet light to form a second alignment layer in which the internal substances are aligned; the first compensation layer is formed on one side of the second alignment layer, specifically, on one side of the second alignment layer The first compensation layer in which the internal liquid crystal material is aligned is formed by irradiation of non-polarized ultraviolet light.

It will be appreciated that in an embodiment, step 803 is omitted.

It can be understood that the compensation layer and the linear polarizing layer do not include a liquid crystal material, and the step of forming an alignment layer is omitted in step 802. In an embodiment, step 802 includes the steps of: covering one side of the cover substrate Providing a mask, the mask comprising a hollowed out area and a non-hollowed area, wherein the hollowed out area corresponds to the visible area; a linearly polarized layer is formed in the hollowed out area; and the line polarizing layer is away from the cover A compensation layer is formed on one side of the board substrate.

In another embodiment, the photopolymerizable reactive polyarylate is used, the photo-solid region is controlled by a photomask, and the photo-curable portion of the photomask is covered with an organic solvent such as methanol. A shielding layer is formed in the shielding region of the cover substrate. Referring to FIG. 11, the manufacturing method of the cover plate specifically includes the following steps:

Step 901, referring to FIG. 12, a side of the cover substrate 101 is coated to form a pre-fabricated polarizing structure 301 (shown in FIG. 13) that covers the entire side of the cover substrate. In step 901, the prefabricated polarizing structure 301 comprises a photopolymerizable reactive polyarylate.

Step 902, referring to FIG. 13, the pre-formed polarizing structure 301 is subjected to illumination orientation and curing using a photomask 401 having a pre-pattern.

Step 903, referring to FIG. 14, etching the pre-formed polarized structure after the illumination orientation and curing treatment, and further forming the polarizing structure 103 in the visible region 1011 of the cover substrate 101.

Step 904, referring to FIG. 15, a shielding layer 105 is formed on the shielding region 1013 of the cover substrate 101. In this embodiment, the shielding layer is disposed around the shielding layer 105.

In one embodiment, the “forming a polarizing structure on one side of the cover substrate” includes: forming a prefabricated polarizing structure on one side of the cover substrate, the prefabricated polarizing structure covering the cover substrate The entire side surface of the material; the pre-fabricated polarizing structure is exposed, developed, and etched using a photomask having a pre-patterned pattern to form the polarizing structure in a visible region of the cover substrate.

The cover plate, the flexible display device and the manufacturing method of the cover plate provided by the invention have the polarizing structure formed directly on the cover substrate, thereby eliminating the substrate of the conventional polarizer, having the characteristics of light and thin flexibility, and lifting the cover plate The bending performance. In addition, when the polarizing structure is damaged, the cover plate is directly replaced, which is convenient for use. In addition, the method of PVA stretching without a conventional polarizer is used, and the dichroic dyeing method is used to improve the weather resistance of the product of the cover sheet. In addition, a circular polarizer is prepared by coating, and the thickness of the coated circular polarizer is very thin, which greatly reduces the overall thickness of the product.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims

A cover plate comprising a cover substrate and a polarizing structure disposed on a side of the cover substrate, wherein the polarizing structure is configured to reduce reflection of light.
The cover according to claim 1, wherein said polarizing structure comprises a linearly polarizing layer provided on one side of said cover substrate.
The cover plate according to claim 2, wherein the polarizing structure further comprises a first alignment layer disposed between the linear polarizing layer and the cover substrate, the first alignment layer being used for The materials contained in the linear polarizing layer are aligned.
The cover according to claim 3, wherein said first alignment layer is directionally aligned by internal light of said first alignment layer by irradiation with polarized ultraviolet light.
The cover according to claim 3, wherein the material contained in the linearly polarizing layer is oriented by the side chain of the internal material of the first alignment layer by the irradiation of the non-polarized ultraviolet light.
The cover plate according to claim 2, wherein the polarizing structure further comprises a first compensation layer, the linear polarizing layer is disposed adjacent to the cover substrate, and the first compensation layer is disposed at the The linear polarizing layer is away from one side of the cover substrate.
The cover plate according to claim 6, wherein the polarizing structure further comprises a second alignment layer disposed between the linear polarizing layer and the first compensation layer.
The cover plate according to claim 7, wherein the second alignment layer is oriented by polarized ultraviolet light to align the internal substances of the second alignment layer, and the material contained in the first compensation layer passes through The irradiation of the polarized ultraviolet light is aligned with the internal material of the second alignment layer to produce a side chain.
The cover plate according to claim 1, wherein the polarizing structure further comprises a first adhesive layer, and the first adhesive layer is bonded between the linear polarizing layer and the first compensation layer.
The cover plate according to claim 1, wherein the cover substrate comprises a visible area and an occlusion area, the polarizing structure is distributed in the visible area, and the cover further comprises a shielding layer. The shielding layer is disposed in a shielding area of the cover substrate.
A cover according to any one of claims 1 to 10, wherein the cover is a flexible cover.
A display device comprising the cover plate and the display module according to any one of claims 1 to 11, wherein the cover plate and the display module are stacked.
The display device as claimed in claim 12, wherein the display module comprises a touch layer and a display layer, the touch layer is disposed between the cover plate and the display layer, and the display device The optical adhesive layer is further disposed, and the side of the touch layer away from the display layer is attached to the polarizing structure through the optical adhesive layer.
The display device according to claim 12, wherein the display module is a flexible display module.
A manufacturing method of a cover plate, characterized in that the manufacturing method comprises:

Providing a cover plate including a cover substrate;

A polarizing structure is formed on one side of the cover substrate.
The manufacturing method according to claim 15, wherein the polarizing structure comprises a first alignment layer, and forming a polarizing structure on one side of the cover substrate comprises: forming on one side of the cover substrate The first alignment layer.
The manufacturing method according to claim 16, wherein the first alignment layer aligns the internal substances of the first alignment layer by irradiation of polarized ultraviolet light during formation.
The manufacturing method according to claim 16, wherein the polarizing structure further comprises a linearly polarizing layer, and forming a polarizing structure on one side of the cover substrate further comprises: one side of the first alignment layer The linear polarizing layer is formed.
The manufacturing method according to claim 17, wherein said linearly polarizing layer is irradiated with non-polarized ultraviolet light during formation so that a material of linearly polarized light and a side material of said first alignment layer generate a side chain. Oriented by action.
The manufacturing method according to claim 17, wherein the polarizing structure further comprises a second alignment layer and a first compensation layer, and forming a polarizing structure on one side of the cover substrate further comprises: One side of the polarizing layer is irradiated with polarized ultraviolet light to form a second alignment layer in which the internal substances are aligned; and one side of the second alignment layer is irradiated with non-polarized ultraviolet light to form a first compensation layer in which the internal liquid crystal material is aligned.
The manufacturing method according to claim 15, wherein said "forming a polarizing structure on one side of said cover substrate" comprises: covering a side of said cover substrate with a mask The mask includes a hollowed out area and a non-hollowed area, wherein the hollowed out area corresponds to a visible area of the cover substrate, and the polarized structure is formed in the hollowed out area.
The manufacturing method according to claim 15, wherein said "forming a polarizing structure on one side of said cover substrate" comprises: forming a pre-fabricated polarizing structure on one side of said cover substrate; The prefabricated polarizing structure covers the entire side surface of the cover substrate; the prefabricated polarizing structure is exposed, developed, and etched by using a photomask having a pre-pattern, thereby forming a visible region of the cover substrate. The polarizing structure.
The manufacturing method according to claim 15, wherein said "forming a polarizing structure on one side of said cover substrate" comprises: forming a compensation layer by coating a compensation layer material on a substrate, The compensation layer is then attached to the functional layer adjacent to the polarizing structure by a glue layer.