Electronic paper diaphragm, electronic paper and display device

Abstract

The utility model discloses an electronic paper diaphragm which comprises a base material layer comprising a first surface and a second surface which are arranged back to back; the anti-dazzle ultraviolet blocking layer is arranged on the first surface; the wear-resistant layer is arranged on one surface, deviating from the base material layer, of the anti-dazzle ultraviolet blocking layer; the water vapor blocking layer is arranged on the second surface; the conductive layer is arranged on one surface, deviating from the base material layer, of the water vapor blocking layer; the bonding layer is arranged between the conductive layer and the water vapor blocking layer; the refractive index of the wear-resistant layer is lower than that of the anti-dazzle ultraviolet blocking layer, so that the wear-resistant layer and the anti-dazzle ultraviolet blocking layer are matched to form an optical anti-reflection structure. According to the electronic paper diaphragm, on the basis that the structure is effectively simplified, the anti-reflection performance and anti-dazzling performance of electronic paper are improved, excellent wear resistance and water vapor barrier performance are guaranteed, cost is low, and universality is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic paper, and in particular relates to an electronic paper membrane, electronic paper and a display device. Background Art

[0002] E-paper is a display technology that mimics the visual effects of paper, offering low power consumption, reflective display, and ease of reading. With the development of consumer electronic display devices, the demand for e-paper display performance and visual experience is increasingly high. Currently, e-paper with excellent anti-reflection and anti-glare properties is being developed. However, existing technologies rely on directly stacking multiple functional film layers, which not only compromises the optical properties of e-paper but also results in an overly complex and costly structure, hindering widespread adoption. Utility Model Content

[0003] The purpose of this application is to provide an electronic paper film, electronic paper and display device to solve the technical problems in the prior art that in order to improve the display performance and visual experience of electronic paper, multiple functional film layers are directly superimposed, which on the one hand loses the optical performance of the electronic paper, and on the other hand, the structure is too complex and the cost is high, which is not conducive to popularization.

[0004] In order to achieve the above-mentioned objectives, the present application provides, in a first aspect, an electronic paper film, comprising:

[0005] The substrate layer comprises a first surface and a second surface disposed opposite to each other;

[0006] an anti-glare UV blocking layer, arranged on the first surface;

[0007] a wear-resistant layer, arranged on a side of the anti-glare UV blocking layer away from the substrate layer;

[0008] a water vapor barrier layer disposed on the second surface;

[0009] A conductive layer is arranged on a side of the water vapor barrier layer away from the substrate layer;

[0010] an adhesive layer disposed between the conductive layer and the water vapor barrier layer;

[0011] The refractive index of the wear-resistant layer is lower than that of the anti-glare UV blocking layer, so that the wear-resistant layer and the anti-glare UV blocking layer cooperate to form an optical anti-reflection structure.

[0012] In one or more embodiments, the refractive index of the wear-resistant layer is 1.35 to 1.42, and the refractive index of the anti-glare UV blocking layer is 1.68 to 1.70.

[0013] In one or more embodiments, the wear-resistant layer has a thickness of 80 to 110 nm, and the anti-glare UV blocking layer has a thickness of 3 to 5 μm.

[0014] In one or more embodiments, the water vapor barrier layer has a thickness of 2 to 5 μm.

[0015] In one or more embodiments, the bonding layer is a silicon dioxide layer, and the thickness of the bonding layer is 5 to 10 nm.

[0016] In one or more embodiments, the conductive layer is an ITO layer, and the thickness of the conductive layer is 20-35 nm.

[0017] In one or more embodiments, the substrate layer is a PET layer or a PEN layer, and the thickness of the substrate layer is 50 to 125 μm.

[0018] In one or more embodiments, the anti-glare UV blocking layer and the wear-resistant layer are obtained by wet coating.

[0019] In order to achieve the above-mentioned purpose, the second aspect of the present application provides an electronic paper, comprising the electronic paper film described in any one of the above-mentioned embodiments.

[0020] In order to achieve the above-mentioned purpose, the third aspect of the present application provides a display device, including the electronic paper described in any one of the above-mentioned embodiments.

[0021] Different from the prior art, the present invention has the following advantages:

[0022] The electronic paper membrane of the present application improves the anti-reflection and anti-glare properties of the electronic paper on the basis of effectively simplifying the structure, ensures excellent wear resistance and water vapor barrier properties, and has low cost and strong popularity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of the electronic paper film of the present application;

[0025] Figure 2 It is a structural diagram of an embodiment of the electronic paper of the present application.

[0026] As shown in the figure:

[0027] Electronic paper film 10; substrate layer 100; first surface 101; second surface 102; anti-glare UV blocking layer 200; wear-resistant layer 300; water vapor barrier layer 400; conductive layer 500; adhesive layer 600;

[0028] Substrate 20. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this utility model.

[0030] In order to improve the display performance and visual experience of electronic paper in the prior art, on the one hand, a multi-layer composite anti-reflection structure is superimposed on the substrate of the electronic paper, thereby improving the anti-reflection performance of the electronic paper and reducing the electronic paper's reflection of external light. On the other hand, an anti-glare layer is superimposed on the substrate of the electronic paper so that the electronic paper can have an anti-glare effect.

[0031] However, this stacked structure results in a loss of optical performance, and its complexity and high cost hinder the widespread adoption of high-performance e-paper. For example, each layer of the anti-reflection structure must be fabricated using magnetron sputtering, which is prohibitively expensive.

[0032] In order to solve the above problems, the applicant has developed a new type of electronic paper membrane, which improves the anti-reflection and anti-glare properties of electronic paper on the basis of effectively simplifying the structure, and ensures that the electronic paper has excellent wear resistance, low cost and strong popularity.

[0033] Specifically, see Figure 1 , Figure 1 This is a structural diagram of an embodiment of the electronic paper film of the present application.

[0034] like Figure 1 As shown, the electronic paper film 10 includes a substrate layer 100 , and the substrate layer 100 includes a first surface 101 and a second surface 102 that are disposed opposite to each other.

[0035] The first surface 101 is provided with an anti-glare UV blocking layer 200 , and a wear-resistant layer 300 is provided on a side of the anti-glare UV blocking layer 200 facing away from the substrate layer 100 .

[0036] A water vapor barrier layer 400 is disposed on the second surface 102 . A conductive layer 500 is disposed on the side of the water vapor barrier layer 400 facing away from the substrate layer 100 . An adhesive layer 600 is further disposed between the conductive layer 500 and the water vapor barrier layer 400 .

[0037] The refractive index of the wear-resistant layer 300 is lower than that of the anti-glare UV blocking layer 200 , so that the wear-resistant layer 300 and the anti-glare UV blocking layer 200 cooperate to form an optical anti-reflection structure.

[0038] Based on the above structure, on the one hand, the anti-glare UV blocking layer 200 provides the electronic paper with anti-glare and anti-UV properties, and the wear-resistant layer 300 effectively ensures the wear resistance of the electronic paper; on the other hand, through the coordination of the refractive indices of the anti-glare UV blocking layer 200 and the wear-resistant layer 300, an optical anti-reflection effect is achieved, which effectively reduces the reflectivity of the electronic paper to external light, helps to improve the display effect, thereby effectively simplifying the structure while improving the anti-reflection and anti-glare properties of the electronic paper, and ensuring that the electronic paper has excellent wear resistance.

[0039] In addition, the water vapor barrier layer 400 can effectively block water vapor, protect the conductive layer 500, and increase the service life of the electronic paper.

[0040] Specifically, in one embodiment, the refractive index of the wear-resistant layer 300 may be 1.35 to 1.42, and the refractive index of the anti-glare UV blocking layer 200 may be 1.68 to 1.70.

[0041] In one embodiment, the thickness of the wear-resistant layer 300 may be 80-110 nm, and the thickness of the anti-glare UV blocking layer 200 may be 3-5 μm, thereby achieving an optimal anti-reflection optical effect through optical matching.

[0042] In one embodiment, the thickness of the water vapor barrier layer 400 may be 2 to 5 μm.

[0043] In the present application, the wear-resistant layer 300, the anti-glare UV blocking layer 200 and the water vapor barrier layer 400 can be selected from any materials in the art that can achieve the corresponding functions. Specifically, in one embodiment, the wear-resistant layer 300, the anti-glare UV blocking layer 200 and the water vapor barrier layer 400 can all be prepared by wet coating, thereby reducing the preparation cost of the electronic paper.

[0044] The coating of the wear-resistant layer 300 may include an existing low-refractive index resin and low-refractive index wear-resistant particles dispersed in the low-refractive index resin, and a photoinitiator may be added to increase the curing rate.

[0045] For example, the low-refractive-index resin may be an acrylic resin whose refractive index meets the requirements, and the low-refractive-index wear-resistant particles may be silicon oxide particles, etc., all of which can achieve the effects of this embodiment.

[0046] The coating of the anti-glare UV blocking layer 200 may include an existing high-refractive index resin, micron-sized inorganic particles dispersed on the surface of the high-refractive index resin, and an existing UV blocking agent, and a photoinitiator is added to increase the curing rate, thereby providing an uneven surface through the inorganic particles to achieve an anti-glare effect, and achieving a UV blocking effect through the UV blocking agent.

[0047] For example, the high refractive index resin may be an acrylic resin having a refractive index that meets the requirements, and the micron-sized inorganic particles may be 3-4 μm zirconium oxide particles, etc., all of which can achieve the effects of this embodiment.

[0048] The coating of the water vapor barrier layer 400 can be any coating in the art that can achieve barrier properties. For example, it can include an organic solvent, a resin, and silicon oxide particles and silicon nitride particles dispersed in the organic solvent, and a photoinitiator can be added to increase the curing rate.

[0049] For example, the organic solvent of the coating of the water vapor barrier layer 400 may include butanone, propylene glycol methyl ether, etc., and the resin may include various forms of acrylates, etc., all of which can achieve the effect of this embodiment.

[0050] It should be noted that the material selection of the anti-glare UV blocking layer 200, the wear-resistant layer 300 and the water vapor barrier layer 400 in this application is not the invention point of this application, and those skilled in the art can adjust them based on actual needs.

[0051] In one embodiment, the substrate layer 100 may be a PET or PEN substrate, and its thickness may be selected to be 50-125 μm.

[0052] In one embodiment, the bonding layer 600 may be a silicon dioxide layer with a thickness of 5 to 10 nm, thereby achieving bonding and fixation between the conductive layer 500 and the water vapor barrier layer 400 .

[0053] Among them, the bonding layer 600 can be prepared by magnetron sputtering. For example, a high-purity Si rotating target can be used, argon and oxygen are introduced, the argon flow rate is 60sccm, the oxygen flow rate is 8sccm, the magnetron sputtering power is 12kw, and the speed is 3m / min to prepare the bonding layer 600.

[0054] In one embodiment, the conductive layer 500 may be an ITO layer having a thickness of 20 to 35 nm. ITO, a commonly used transparent conductive material in the art, can be prepared by magnetron sputtering. For example, a high-purity ITO rotating target can be used, argon and oxygen are introduced, with an argon flow rate of 40 sccm and an oxygen flow rate of 30 sccm, a magnetron sputtering power of 13 kW, and a travel speed of 2 m / min to prepare the conductive layer 500.

[0055] Based on the above embodiments, on the basis of effectively simplifying the structure, the anti-reflection performance and anti-glare performance of the electronic paper are improved, and excellent wear resistance and water vapor barrier performance are guaranteed. In addition, the cost is low and the popularity is strong.

[0056] This application also provides an electronic paper, see Figure 2 , Figure 2 This is a schematic diagram of the structure of an embodiment of the electronic paper of the present application. Figure 2 As shown, the electronic paper includes a substrate 20 and an electronic paper film 10 arranged in any one of the above embodiments.

[0057] The present application also provides a display device, which uses the electronic paper of any of the above embodiments to display images.

[0058] The beneficial effects of the technical solution of the present application are further elaborated in detail below with reference to specific embodiments.

[0059] Example 1:

[0060] An electronic paper membrane comprises a wear-resistant layer, an anti-glare ultraviolet barrier layer, a substrate layer, a water vapor barrier layer, an adhesive layer and a conductive layer which are stacked in sequence.

[0061] The substrate layer is a 125 μm PET substrate.

[0062] The thickness of the anti-glare UV blocking layer is 4μm, and the preparation method includes: taking 18 parts of zirconium oxide (4μm) particles and dissolving them in a mixed solvent of 20 parts of butanone and 30 parts of propylene glycol methyl ether, and stirring at room temperature for 4 hours using a magnetic stirrer. After stirring is completed, 45 parts of Halima UVH-D-ZR-174-1 (refractive index n=1.7) are added successively, and then stirred at room temperature for 2 hours using a magnetic stirrer, and finally 4 parts of BASF 184 and 1.5 parts of Jedewin UV 571 are added to obtain a coating liquid. Use a 12# wire rod to spin-coat the coating liquid on one side of the substrate layer, bake it in an 80°C oven for 2 minutes, and then put the baked sample into a UV machine for curing at 300mJ / cm 2 The obtained product is cured under ultraviolet light.

[0063] The thickness of the wear-resistant layer is 100nm. The preparation method includes: taking 15 parts of silicon oxide (120nm) particles and dissolving them in a mixed solvent of 20 parts of butanone and 30 parts of propylene glycol methyl ether, and stirring at room temperature for 4 hours using a magnetic stirrer. After stirring is completed, 45 parts of Ningbo Tianxuan New Material SPC-1410 refractive index (n=1.38) are added successively, and then stirred at room temperature for 2 hours using a magnetic stirrer, and finally 4 parts of BASF 184 are added to obtain a coating liquid. Use a 3# wire rod to spin-coat the coating liquid on the anti-glare UV blocking layer, bake it in an 80℃ oven for 2 minutes, and then put the baked sample into a UV machine for curing at 500mJ / cm2 The obtained product is cured under ultraviolet light.

[0064] The thickness of the water vapor barrier layer is 2μm. The preparation method includes: taking 1 part of silicon oxide particles (50nm) and 1 part of silicon nitride particles (50nm) and dissolving them in a mixed solvent of 30 parts of butanone and 30 parts of propylene glycol methyl ether, and heating them to 50°C and stirring for 4 hours using a magnetic stirrer. After stirring is completed, let it cool to room temperature, and then add 45 parts of Sartomer CN2254NS and 10 parts of pentaerythritol triacrylate, stir them at room temperature for 2 hours using a magnetic stirrer, and finally add 5 parts of BASF 184 to obtain a coating solution. Use a 15# wire rod to spin-coat the coating solution on the other side of the substrate layer, bake it in an 80°C oven for 2 minutes, and then put the baked sample into a UV machine for curing at 500mJ / cm 2 Curing is carried out under ultraviolet light conditions.

[0065] The bonding layer is a 10 nm thick silicon dioxide layer, and the conductive layer is a 28 nm thick ITO layer, both of which are prepared by magnetron sputtering.

[0066] Example 2:

[0067] An electronic paper membrane, the structure of which is basically the same as that of Example 1, except that:

[0068] The thickness of the anti-glare UV blocking layer is 3 μm.

[0069] Example 3:

[0070] An electronic paper membrane, the structure of which is basically the same as that of Example 1, except that:

[0071] The thickness of the anti-glare UV blocking layer is 5 μm.

[0072] Example 4:

[0073] An electronic paper membrane, the structure of which is basically the same as that of Example 1, except that:

[0074] The substrate layer is a 50 μm PEN substrate, the thickness of the wear-resistant layer is 80 nm, the thickness of the adhesive layer is 5 nm, and the thickness of the conductive layer is 20 nm.

[0075] Example 5:

[0076] An electronic paper membrane, the structure of which is basically the same as that of Example 1, except that:

[0077] The thickness of the wear-resistant layer is 110 nm, and the thickness of the conductive layer is 35 nm.

[0078] Comparative Example 1:

[0079] An electronic paper membrane has a structure substantially the same as that of embodiment 1, except that the water vapor barrier layer is removed compared with embodiment 1.

[0080] Comparative Example 2:

[0081] An electronic paper membrane has a structure substantially the same as that of Example 1, except that the anti-glare UV blocking layer is removed.

[0082] Comparative Example 3:

[0083] An electronic paper membrane has a structure substantially the same as that of Example 1, except that the thickness of the wear-resistant layer is 50 nm.

[0084] Effect example:

[0085] The electronic paper films of Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to performance tests. The test contents and methods are as follows:

[0086] Transmittance: Use a transmittance tester to test the transmittance of 380-780nm light incident from the conductive layer side, and the transmittance of 380nm ultraviolet light incident from the wear-resistant layer side;

[0087] Haze: Use a haze meter to test the haze of the diaphragm;

[0088] Glossiness: Use a gloss meter to test the glossiness of the film surface at an angle of 60°;

[0089] Hardness: Use a graphite pencil to test the surface hardness of the diaphragm according to ASTM D3363;

[0090] Abrasion resistance: Using steel wool abrasion test method, square head: 2cmx2cm, SW: Bon star #0000, load 1kg;

[0091] Water vapor transmission rate: Use a water vapor transmission rate tester to test the water resistance of the film according to ASTM F1249 standard;

[0092] Sheet resistance: Use a sheet resistance tester to test the sheet resistance of the diaphragm.

[0093] The results of the above tests are shown in the following table:

[0094]

[0095] As shown in the data in the table above, the transmittance of the films of Examples 1 to 3 for 380-780 nm light incident on the conductive layer side all reached more than 94%, which helps to improve the display effect; the transmittance of Comparative Example 1 was not affected after the water vapor barrier layer was removed, while the removal of the anti-glare UV blocking layer in Comparative Example 2 and the removal of the wear-resistant layer in Comparative Example 3 both led to a decrease in transmittance, which was mainly due to the destruction of the high-refractive and low-refractive optical structures, affecting the anti-reflection effect.

[0096] The transmittance of the diaphragms of Examples 1 to 3 for 380nm ultraviolet light incident on the wear-resistant layer side is all lower than 4%, showing excellent ultraviolet blocking effect; the ultraviolet blocking rate of Comparative Example 1 is not affected after the water vapor barrier layer is removed, the ultraviolet blocking effect is seriously affected after the anti-glare ultraviolet blocking layer is removed in Comparative Example 2, and the ultraviolet blocking rate is not affected after the wear-resistant layer is removed in Comparative Example 3.

[0097] The glossiness at 60° of Examples 1 to 3, Comparative Examples 1 and 3 is lower than 26, and they have excellent anti-glare performance. After the anti-glare UV blocking layer of Comparative Example 2 is removed, the glossiness is greater than 98.2, which affects the viewing comfort.

[0098] The hardness of Examples 1 to 3 and Comparative Example 1 all reached 4H, and the wear resistance reached 3000 times; Comparative Example 2 removed the anti-glare UV blocking layer, resulting in damage to the hardness and wear resistance; Comparative Example 3 thinned the wear-resistant layer, resulting in damage to the wear resistance.

[0099] The water vapor transmission rates of Examples 1 to 3, Comparative Examples 2 and 3 are all low, meeting the requirements; however, after the water vapor barrier layer is removed from Comparative Example 1, the water vapor transmission rate is high, which cannot meet the requirements.

[0100] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0101] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An electronic paper film, characterized in that: include: The substrate layer comprises a first surface and a second surface disposed opposite to each other; an anti-glare UV blocking layer, arranged on the first surface; a wear-resistant layer, arranged on a side of the anti-glare UV blocking layer away from the substrate layer; a water vapor barrier layer disposed on the second surface; A conductive layer is arranged on a side of the water vapor barrier layer away from the substrate layer; an adhesive layer disposed between the conductive layer and the water vapor barrier layer; The refractive index of the wear-resistant layer is lower than that of the anti-glare UV blocking layer, so that the wear-resistant layer and the anti-glare UV blocking layer cooperate to form an optical anti-reflection structure.

2. The electronic paper film according to claim 1, characterized in that: The refractive index of the wear-resistant layer is 1.35-1.42, and the refractive index of the anti-glare UV blocking layer is 1.68-1.

70.

3. The electronic paper film according to claim 2, characterized in that: The thickness of the wear-resistant layer is 80-110 nm, and the thickness of the anti-glare UV blocking layer is 3-5 μm.

4. The electronic paper film according to claim 1, characterized in that: The thickness of the water vapor barrier layer is 2 to 5 μm.

5. The electronic paper film according to claim 1, characterized in that: The bonding layer is a silicon dioxide layer, and the thickness of the bonding layer is 5-10 nm.

6. The electronic paper film according to claim 1, characterized in that: The conductive layer is an ITO layer, and the thickness of the conductive layer is 20-35 nm.

7. The electronic paper film according to claim 1, characterized in that: The substrate layer is a PET layer or a PEN layer, and the thickness of the substrate layer is 50 to 125 μm.

8. The electronic paper film according to claim 1, characterized in that: The anti-glare UV blocking layer and the wear-resistant layer are obtained by wet coating.

9. An electronic paper, characterized in that: The electronic paper film comprises any one of claims 1 to 8.

10. A display device, characterized in that: Including the electronic paper according to claim 9.

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