Screen protection sticker
By designing a high-refractive index and low-refractive index coating layer of the laminated structure in the screen protector, combined with a hard resin layer and an anti-fouling layer, the problem of existing screen protectors ignoring fingerprint recognition and display effects is solved, and more efficient fingerprint recognition and display effects are achieved.
Patent Information
- Application Number
- CN202421168637.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-27
AI Technical Summary
When pursuing reflection effects, existing screen protectors ignore the impact on fingerprint recognition and display effects, resulting in poor operating experience.
A high-refractive index coating layer and a low-refractive index coating layer with a laminated structure, combined with a hard resin layer and an anti-fouling layer, is designed to design a screen protector to take into account the reflectivity and fingerprint recognition effect.
It improves the accuracy of mobile phone fingerprint recognition and the display effect of the display device, while enhancing the anti-reflection ability and touch feel of the screen.
Smart Images
Figure CN222795483U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mobile phone films, and in particular relates to a screen protector. Background Art
[0002] The screen assembly is an important part of a smartphone and accounts for 25% of the cost of the phone. Once the screen assembly is damaged, the repair cost is extremely high. Therefore, a cover glass is set on the screen assembly to protect the phone screen. In the era of keyboard feature phones, the screen protection panel was mainly made of PC plastic and plexiglass, both of which have poor wear resistance. However, the mobile phones at that time had fewer functions, and the displayed content was mainly text, so even if there were some scratches, it would not affect the use.
[0003] As the market share of smartphones continues to expand, the requirements for screen glass wear resistance and transparency are becoming higher and higher. Major screen assembly factories will perform anti-reflection and anti-fouling treatment on the screen assembly to reduce costs. However, the existing anti-reflection layer of the screen assembly only pursues the reflection effect and ignores the subsequent viewing experience, affecting fingerprint recognition, face recognition and other auxiliary functions, resulting in a poor operator experience.
[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content
[0005] The purpose of the utility model is to provide a screen protector, which can improve the accuracy of mobile phone fingerprint recognition and improve the display effect of the display device.
[0006] A screen protector is used to be attached to the outer surface of a display device, and the display device should at least include a light-emitting unit and a screen assembly. The screen protector includes: a substrate layer, a hardened resin layer, a first high-refractive index coating layer, a first low-refractive index coating layer, a second high-refractive index coating layer, and a second low-refractive index coating layer. The substrate layer has a first surface and a second surface that are arranged opposite to each other, and the second surface is provided with an optical adhesive layer for being attached to the screen assembly, and the first surface is provided with a hardened resin layer, a first high-refractive index coating layer, a first low-refractive index coating layer, a second high-refractive index coating layer, and a second low-refractive index coating layer in sequence; after attaching the screen protector to the display device, press the display device with a finger, the reflectivity of the screen assembly to the light emitted by the light-emitting unit is R1, and the reflectivity of the finger to the light emitted by the light-emitting unit is R2, and 2.5<(R1+R2) / R1<6.
[0007] In one or more embodiments of the present invention, the substrate layer is selected from one of a PET layer, a PC layer or a glass layer, and the thickness of the substrate layer is 50 μm-300 μm.
[0008] In one or more embodiments of the present invention, the refractive index of the hardened resin layer is 1.50-1.55, and the thickness is 3 μm-5 μm.
[0009] In one or more embodiments of the present invention, the first high refractive index coating layer and the second high refractive index coating layer are Si3N4 layers, the first low refractive index coating layer is SiO2 layer, and the second low refractive index coating layer is SiAlO X layer.
[0010] In one or more embodiments of the present invention, the thickness of the first high refractive index coating layer is 15nm-20nm, the thickness of the first low refractive index coating layer is 30nm-40nm, the thickness of the second high refractive index coating layer is 130nm-145nm, and the thickness of the second low refractive index coating layer is 80nm-90nm.
[0011] In one or more embodiments of the present invention, the refractive index of the first high refractive index coating layer and the second high refractive index coating layer is 1.9-2.2, the refractive index of the first low refractive index coating layer is 1.45-1.6, and the refractive index of the second low refractive index coating layer is 1.45-1.52.
[0012] In one or more embodiments of the present invention, an anti-fouling layer is provided on a side of the second low-refractive index coating layer away from the substrate layer, and the thickness of the anti-fouling layer is 5nm-20nm.
[0013] In one or more embodiments of the present invention, the refractive index of the anti-fouling layer is 1.33-1.4.
[0014] In one or more embodiments of the present invention, the display device further includes an anti-reflection coating layer disposed on the screen assembly.
[0015] In one or more embodiments of the present invention, the value range of R2 is 3%-4%.
[0016] Compared with the prior art, the screen protector of the utility model can take into account the refractive index of the screen assembly with and without anti-reflection coating layer by setting up a stacked high-refractive index coating layer and a low-refractive index coating layer, thereby improving the fingerprint recognition rate and display effect of the mobile phone screen. In addition, the screen protector is also provided with an anti-fouling layer to prevent fouling and improve the touch feel. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 This is a schematic diagram of a screen protector in one embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of the screen protector in Example 1 being attached to a display device without an anti-reflection coating layer;
[0020] Figure 3 This is a schematic diagram of the screen protector in Example 2 being attached to a display device having an anti-reflection coating layer;
[0021] Figure 4 is a schematic diagram of a display device without an anti-reflection coating layer in Comparative Example 1;
[0022] Figure 5 is a schematic diagram of a display device with an anti-reflection coating layer in Comparative Example 2;
[0023] Figure 6 Schematic diagram of a commercially available protective film attached to a display device having an anti-reflection coating layer in Comparative Example 3.
[0024] Description of main reference numerals:
[0025] 1-screen protector, 11-base material layer, 12-hardened resin layer, 13-first high refractive index coating layer, 14-first low refractive index coating layer, 15-second high refractive index coating layer, 16-second low refractive index coating layer, 17-anti-fouling layer, 2-optical adhesive layer, 3-anti-reflection coating layer, 4-screen assembly, 5-light-emitting unit. DETAILED DESCRIPTION
[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0027] like Figure 1As shown, a screen protector 1 in one embodiment of the utility model is used to be attached to the outer surface of a display device. The display device should at least include a light-emitting unit 5 and a screen assembly 4. The screen protector includes: a substrate layer 11, a hardened resin layer 12, a first high refractive index coating layer 13, a first low refractive index coating layer 14, a second high refractive index coating layer 15, and a second low refractive index coating layer 16. The substrate layer 11 has a first surface and a second surface that are arranged opposite to each other, and the second surface is provided with an optical adhesive layer 2 for bonding with the screen assembly 4 of the mobile phone display screen. The hardened resin layer 12, the first high refractive index coating layer 13, the first low refractive index coating layer 14, the second high refractive index coating layer 15, and the second low refractive index coating layer 16 are sequentially arranged on the first surface.
[0028] The reflectivity of the screen assembly 4 to the light emitted by the light emitting unit 5 is R1; when the display device is pressed with a finger, the reflectivity of the light emitted by the light emitting unit 5 is R2. After the screen protector 1 is attached to the display device, 2.5<(R1+R2) / R1<6. Among them, the fingerprint recognition degree = (R1+R2) / R1. Furthermore, the value of R2 is actually measured and its range is 3%-4%.
[0029] In one embodiment, the display device further includes an anti-reflection coating layer 3 disposed on the screen assembly 4 to improve the sensitivity of fingerprint recognition, facial recognition, etc. At the same time, some mobile phone manufacturers do not plate an anti-reflection coating layer 3 on the surface of the screen assembly 4 in order to save costs. This type of screen has a lower cost, but the sensitivity of fingerprint recognition is limited and the touch feel is poor. In addition, the application of existing depolarization technology on mobile phone screens will cause the backlight reflection of the mobile phone screen to be very high, resulting in poor display effect of the screen.
[0030] In the above embodiment, the screen protector 1 can play a good protective role on the screen assembly 4 with and without the anti-reflection coating layer 3 by providing a resin layer and alternating high refractive index layers and low refractive index layers. On the screen assembly 4 with the anti-reflection coating layer 3, the screen protector 1 can effectively protect the anti-reflection coating layer 3 from wear and tear of the anti-reflection coating layer 3, and there is no need to replace the expensive screen assembly 4 later, and the sensitivity of fingerprint recognition is further improved. On the screen assembly 4 without the anti-reflection coating layer 3, the screen protector 1 can improve the anti-reflection ability of the screen while improving the sensitivity of fingerprint recognition, and can also improve the touch feel of the screen.
[0031] In one embodiment, the substrate layer 11 can be selected from one of a PET layer, a PC layer, and a glass layer. The PET layer as the substrate layer 11 can be used as a soft screen protector 1, so that it can be suitable for curved screens and other special-shaped screens with curvature. The PC layer and the glass layer as the substrate layer 11 can be used as a hard screen protector 1, which is suitable for straight screens. Furthermore, the thickness of the substrate layer 11 is between 50 μm and 300 μm.
[0032] The hardened resin layer 12 is coated on the first surface of the substrate layer 11, and is formed by mixing acrylic resin and silica particles. It should be noted that the hardened resin layer 12 can be coated on the first surface of the substrate layer 11 using existing components, and the present invention is not limited thereto. In one embodiment, the refractive index of the hardened resin layer 12 is between 1.50-1.55, and the thickness is between 3μm-5μm.
[0033] In one embodiment, the surface of the hardened resin layer 12 is magnetron sputtered with a first high refractive index coating layer 13. Specifically, the first high refractive index coating layer 13 can be a silicon target with a purity of 5N and a vacuum degree of 8.0×10 -3 Under the condition of Pa and below, argon gas and nitrogen gas are filled in a ratio of 1:1 and then magnetron sputtering is performed on the surface of the hardened resin layer 12 .
[0034] The first high refractive index coating layer 13 may be a Si3N4 layer. Specifically, the refractive index of the first high refractive index coating layer 13 may be between 1.9 and 2.2, and the thickness may be between 15 nm and 20 nm. Preferably, the refractive index of the first high refractive index coating layer 13 is 1.9.
[0035] The first low refractive index coating layer 14 can also be magnetron sputtered on the surface of the first high refractive index coating layer 13. Specifically, the first low refractive index coating layer 14 can be magnetron sputtered on the surface of the first high refractive index coating layer 13 by using a silicon target with a purity of 5N in a vacuum of 8.0×10 -3 Under the condition of Pa or less, argon and nitrogen are filled in a ratio of 2:1, and sputtering is performed on the surface of the first high refractive index coating layer 13. In one embodiment, the first low refractive index coating layer 14 may be a SiO2 layer.
[0036] In one embodiment, the refractive index of the first low-refractive index coating layer 14 may be between 1.45 and 1.6, and the thickness of the first low-refractive index coating layer 14 may be between 30 nm and 40 nm.
[0037] A second high refractive index coating layer 15 is sputtered on the surface of the first low refractive index coating layer 14. In one embodiment, the second high refractive index coating layer 15 may be a Si3N4 layer. Specifically, the second high refractive index coating layer 15 may be a Si3N4 layer using a 5N purity silicon target at a vacuum of 8.0×10 -3Under the condition of Pa and below, argon gas and nitrogen gas are filled in a ratio of 1:1 and then sputtered on the surface of the first low refractive index coating layer 14 to form the coating layer.
[0038] Further, the refractive index of the second high refractive index coating layer 15 may be between 1.9 and 2.2. The thickness of the second high refractive index coating layer 15 may be between 130 nm and 145 nm. Preferably, the refractive index of the second high refractive index coating layer 15 is 1.9.
[0039] A second low refractive index coating layer 16 is sputtered on the surface of the second high refractive index coating layer 15. The second low refractive index coating layer 16 is SiAlO X The layer is made of a silicon-aluminum target doped with 1%wt-30%wt aluminum at a vacuum degree of 8.0×10 -3 Under the condition of 2:1 argon and nitrogen gas at 0.540 Å / min, the second high refractive index coating layer 15 is sputtered and formed on the surface of the second high refractive index coating layer 15 .
[0040] Specifically, the refractive index of the second low-refractive index coating layer 16 may be between 1.45 and 1.52, and the thickness of the second low-refractive index coating layer 16 may be between 80 nm and 90 nm.
[0041] In one embodiment, in order to improve the anti-fouling ability of the screen protector 1 and improve the touch feel, the anti-fouling layer 17 is sprayed on the surface of the second low-refractive index coating layer 16. Specifically, the anti-fouling layer 17 can be formed on the surface of the second low-refractive index coating layer 16 by spraying. The main component of the anti-fouling layer 17 is a fluorine-containing polymer such as hexafluoropropylene trimer. Specifically, the thickness of the anti-fouling layer 17 can be between 5nm-20nm, and the refractive index can be between 1.33-1.40.
[0042] The utility model is further described below in conjunction with specific embodiments and comparative examples.
[0043] Example 1
[0044] Screen Protector 1:
[0045] Substrate layer 11: PET layer, thickness 100μm. Hardened resin layer 12: refractive index 1.5, thickness 3μm. First high refractive index coating layer 13: Si3N4 layer, refractive index 1.90, thickness 15nm. First low refractive index coating layer 14: SiO2 layer, refractive index 1.45, thickness 30nm. Second high refractive index coating layer 15: Si3N4 layer, refractive index 1.90, thickness 130nm. Second low refractive index coating layer 16: SiAlO X , refractive index 1.45, thickness 80nm. Antifouling layer 17: refractive index 1.33, thickness 5nm.
[0046] Test method: Figure 2 As shown, the screen protector 1 of Example 1 is attached to the screen assembly 4 without the anti-reflection coating layer 3, and the reflectivity of the screen assembly 4 before and after the protective film is attached is tested. The display device includes: a screen assembly 4 and a light-emitting unit 5 from top to bottom.
[0047] Test results:
[0048] Before fitting:
[0049] The reflectivity R1 of the screen assembly 4 to the light emitted by the light-emitting unit 5 is 4.2%;
[0050] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 4%.
[0051] After bonding:
[0052] The reflectivity R1 of the screen assembly 4 to the light emitted by the light-emitting unit 5 is 0.82%. At this time, R1 is jointly determined by the screen protector 1 and the screen assembly 4.
[0053] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 4%.
[0054] Fingerprint recognition contrast: 5.87. The fingerprint recognition contrast is relatively high and the recognition is relatively sensitive.
[0055] Example 2
[0056] Screen Protector 1:
[0057] Substrate layer 11: glass layer, thickness 50μm. Hardened resin layer 12: refractive index 1.55, thickness 5μm. First high refractive index coating layer 13: Si3N4 layer, refractive index 1.90, thickness 20nm. First low refractive index coating layer 14: SiO2 layer, refractive index 1.45, thickness 40nm. Second high refractive index coating layer 15: Si3N4 layer, refractive index 1.90, thickness 145nm. Second low refractive index coating layer 16: SiAlO X , refractive index 1.52, thickness 90nm. Antifouling layer 17: refractive index 1.40, thickness 10nm.
[0058] Test method: Figure 3 As shown, the screen protector 1 of Example 2 is attached to the screen assembly 4 having the anti-reflection coating layer 3 through the optical adhesive layer 2, and the reflectivity of the screen assembly 4 before and after the protective film is attached is tested. The display device includes, from top to bottom, a screen assembly 4 having the anti-reflection coating layer 3 and a light-emitting unit 5.
[0059] Test results:
[0060] Before fitting:
[0061] The reflectivity R1 of the screen assembly 4 to the light emitted by the light-emitting unit 5 is 2.2%;
[0062] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 3%.
[0063] After bonding:
[0064] Protective film surface reflectivity: 0.8%;
[0065] The reflectivity R1 of the screen assembly 4 to the light emitted by the light-emitting unit 5 is 1.9%. At this time, R1 is jointly determined by the screen protector 1 and the screen assembly 4 .
[0066] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 3%.
[0067] Fingerprint recognition contrast: 2.57. Fingerprint recognition is sensitive, easy to replace, and low cost.
[0068] Comparative Example 1
[0069] like Figure 4 As shown, the screen assembly 4 does not have the anti-reflection coating layer 3 and is not attached to the screen protector 1 of the present invention.
[0070] Test method: Test the reflectivity of the screen assembly 4. The display device includes, from top to bottom, a screen assembly 4 and a light-emitting unit 5.
[0071] Test results:
[0072] The reflectivity R1 of the screen assembly 4 to the light emitted by the light emitting unit 5 is 4.25%;
[0073] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 3%.
[0074] Fingerprint recognition contrast: 1.7. The fingerprint recognition contrast is relatively low and the recognition is not sensitive.
[0075] Comparative Example 2
[0076] like Figure 5 As shown, the screen assembly 4 has an anti-reflection coating layer 3 and is not attached with the screen protector 1 of the present invention.
[0077] Test method: Test the reflectivity of the screen assembly 4. The display device comprises: a screen assembly 4 having an anti-reflection coating layer 3 and a light-emitting unit 5 in sequence.
[0078] Test results:
[0079] The reflectivity R1 of the screen assembly 4 to the light emitted by the light emitting unit 5 is 0.5%;
[0080] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 3%.
[0081] Fingerprint recognition contrast: 7. The fingerprint recognition contrast is relatively high. Fingerprint recognition is relatively sensitive. However, the anti-reflection coating layer 3 is easily damaged, and the cost of replacing the mobile phone screen is high.
[0082] Comparative Example 3
[0083] like Figure 6 As shown, the screen assembly 4 has an anti-reflection coating layer 3, and a conventional (Dexerials AR100-T062V) screen protector 1 is attached to the anti-reflection coating layer 3 via an optical adhesive layer 2. The conventional screen protector comprises a substrate layer, an NB2O5 layer, a SiO2 layer, a NB2O5 layer, a SiO2 layer, and an AF layer from bottom to top.
[0084] Test method: Test the reflectivity of the screen assembly 4 after being attached to a conventional screen protector 1. The display device includes, from top to bottom, a screen assembly 4 having an anti-reflection coating layer 3 and a light-emitting unit 5.
[0085] Test results:
[0086] Before fitting:
[0087] The reflectivity R1 of the screen assembly 4 to the light emitted by the light emitting unit 5 is 0.5%;
[0088] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 4%;
[0089] After bonding:
[0090] The reflectivity of the protective film surface is 0.5%;
[0091] The reflectivity R1 of the screen assembly 4 to the light emitted by the light-emitting unit 5 is 3.4%. At this time, R1 is jointly determined by the screen protector 1 and the screen assembly 4.
[0092] The reflectivity of the finger to the light emitted by the light emitting unit 5 is R2: 4%.
[0093] Fingerprint recognition contrast: 2.18. Fingerprint recognition sensitivity is reduced.
[0094] In summary, the screen protector 1 of the present invention can take into account the reflectivity of the screen assembly 4 with and without the anti-reflection coating layer 3 by providing a stacked high refractive index layer and a low refractive index layer, thereby improving the fingerprint recognition rate and display effect of the mobile phone screen. In addition, the screen protector 1 is also provided with an anti-fouling layer 17, which can prevent dirt and improve the touch feel.
[0095] It is obvious 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 features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0096] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A screen protector, used to be attached to the outer surface of a display device, wherein the display device at least includes a light-emitting unit and a screen assembly, characterized in that: The screen protector includes: The substrate layer has a first surface and a second surface that are oppositely disposed, the second surface is provided with an optical adhesive layer for bonding with the screen assembly, and the first surface is provided with a hardened resin layer, a first high refractive index coating layer, a first low refractive index coating layer, a second high refractive index coating layer, and a second low refractive index coating layer in sequence; The reflectivity of the screen assembly to the light emitted by the light-emitting unit is R1; the display device is pressed with a finger, the reflectivity of the finger to the light emitted by the light-emitting unit is R2, the screen protector is attached to the display device, and 2.5<(R1+R2) / R1<6.
2. The screen protector according to claim 1, characterized in that: The substrate layer is selected from one of a PET layer, a PC layer or a glass layer, and the thickness of the substrate layer is 50 μm-300 μm.
3. The screen protector according to claim 1, characterized in that: The refractive index of the hardened resin layer is 1.50-1.55, and the thickness is 3 μm-5 μm.
4. The screen protector according to claim 1, characterized in that: The first high refractive index coating layer and the second high refractive index coating layer are Si3N4 layers, the first low refractive index coating layer is SiO2 layer, and the second low refractive index coating layer is SiAlO X layer.
5. The screen protector according to claim 4, characterized in that: The thickness of the first high refractive index coating layer is 15nm-20nm, the thickness of the first low refractive index coating layer is 30nm-40nm, the thickness of the second high refractive index coating layer is 130nm-145nm, and the thickness of the second low refractive index coating layer is 80nm-90nm.
6. The screen protector according to claim 5, characterized in that: The refractive indexes of the first high-refractive index coating layer and the second high-refractive index coating layer are 1.9-2.2, the refractive index of the first low-refractive index coating layer is 1.45-1.6, and the refractive index of the second low-refractive index coating layer is 1.45-1.
52.
7. The screen protector according to claim 1, characterized in that: An anti-fouling layer is disposed on a side of the second low-refractive index coating layer away from the substrate layer, and the thickness of the anti-fouling layer is 5nm-20nm.
8. The screen protector according to claim 7, characterized in that: The refractive index of the antifouling layer is 1.33-1.
4.
9. The screen protector according to claim 1, characterized in that: The display device also includes an anti-reflection coating layer arranged on the screen assembly.
10. The screen protector according to claim 1, characterized in that: The numerical value range of R2 is 3%-4%.