CN113698880A - Preparation method of under-screen fingerprint protection paste, under-screen fingerprint protection paste and detection method - Google Patents
Preparation method of under-screen fingerprint protection paste, under-screen fingerprint protection paste and detection method Download PDFInfo
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- CN113698880A CN113698880A CN202110939195.6A CN202110939195A CN113698880A CN 113698880 A CN113698880 A CN 113698880A CN 202110939195 A CN202110939195 A CN 202110939195A CN 113698880 A CN113698880 A CN 113698880A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C09J2467/00—Presence of polyester
- C09J2467/003—Presence of polyester in the primer coating
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- C09J2467/006—Presence of polyester in the substrate
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Abstract
The invention relates to a preparation method of an underscreen fingerprint protection sticker, and an underscreen fingerprint protection sticker and a detection method, wherein the preparation method comprises the following steps: obtaining a PET film; the PET film is subjected to bidirectional stretching, and then the stretched PET film is subjected to heat setting to obtain a PET optical substrate with a preset orientation degree, wherein the alignment angle of the PET optical substrate is consistent with the angle of a polarizer of a display screen; coating anti-reflection coatings on two surfaces of the PET optical substrate to obtain an anti-reflection PET optical film; and coating a hardening layer on one surface of the anti-reflection PET optical film, and coating a pressure-sensitive adhesive layer on the other surface of the anti-reflection PET optical film to obtain the under-screen fingerprint protection sticker. The method has the advantages of good orientation degree, high sensitivity, good light transmittance, convenient material taking, simple and feasible preparation method and contribution to large-scale production.
Description
Technical Field
The invention relates to the technical field of electronic equipment film pasting, in particular to a preparation method of an under-screen fingerprint protection paste, the under-screen fingerprint protection paste and a detection method.
Background
Generally, a factory surface of a mobile phone is provided with a layer of protection paste for protecting the surface of the mobile phone from being damaged. Because the general popularity of present comprehensive screen cell-phone, no matter traditional fingerprint unblock adopts the positive scraping or presses the unblock, still adopts the back unblock, all can influence the outward appearance of mobile phone equipment, and fingerprint identification needs the fingerprint collection window, can influence the screen to account for the ratio, therefore the fingerprint technique under the screen takes place. Currently, there are mainly ultrasonic and optical solutions for the underscreen fingerprint. The optical scheme is that an optical sensor is arranged below a screen, and fingerprint grains of a user are identified by emitting near infrared light, and the idea of the optical scheme is similar to that of the structured light scheme of an apple. When the sensor is activated, the sensor illuminates the fingerprint identification area through the OLED panel backlight on the upper layer, then transmits the reflected optical fiber to the sensor on the bottom layer, and completes the whole identification process.
Most of protective films in the market take a PET film as a base film, the outer surface of the protective film is hardened, the inner surface of the protective film is pressure-sensitive, after the common protective film is attached, because the phase difference of PET is high, the unlocking efficiency of fingerprints under a screen is reduced, and the attaching effect of the protective film and the screen is poor due to the hard attachment of the PET film; or the SRF, COP or PI film is adopted as a base material, is mainly an imported material, is high in price, is unstable in supply period, and is not beneficial to wide popularization and application. Meanwhile, aiming at the unlocking efficiency of the fingerprint under the screen, a material manufacturer does not have a standard detection method, and the fingerprint sensitivity can be identified generally only by authorizing mobile phone detection by a terminal client.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defects that the fingerprint unlocking efficiency of the under-screen fingerprint protection sticker using the PET film as the base film is low and the fingerprint sensitivity is not convenient to identify in the prior art.
In order to solve the technical problem, the invention provides a preparation method of an underscreen fingerprint protection sticker, which comprises the following steps of:
s1, obtaining a PET film;
s2, carrying out biaxial stretching on the PET film, and then carrying out heat setting on the stretched PET film to obtain a PET optical substrate with a preset orientation degree, wherein the alignment angle of the PET optical substrate is consistent with the angle of the polarizer of the display screen;
s3, coating anti-reflection coatings on two surfaces of the PET optical substrate to obtain an anti-reflection PET optical film;
s4, coating a hardening layer on one surface of the anti-reflection PET optical film, and coating a pressure-sensitive adhesive layer on the other surface of the anti-reflection PET optical film to obtain the under-screen fingerprint protection sticker.
Preferably, in S2, the biaxially stretching the PET film includes:
longitudinally stretching the PET film at a first temperature to obtain a longitudinally stretched PET stretched film, wherein the longitudinal stretch ratio of longitudinal stretching is 3.3-4 times;
and transversely stretching the longitudinally stretched PET stretched film at a second temperature to obtain a biaxially stretched PET stretched film, wherein the transverse stretch ratio of transverse stretching is 3.5-4 times.
Preferably, the first temperature is 200-300 ℃; the second temperature is 100-150 ℃.
Preferably, in S2, the temperature for heat-setting the stretched PET film is 200-250 ℃.
Preferably, in S3, the thickness of the antireflective coating is 100-200 nm.
Preferably, the antireflection coating comprises 2-4 functional group polyester acrylate, 4-6 functional group 1, 6-hexanediol diacrylate, 10-100nm nanometer hollow silica and a diluent.
Preferably, the weight of the 2-4 functional polyester acrylate accounts for 10% -20% of the weight of the antireflection coating, and the refractive index of the 2-4 functional polyester acrylate is 1.45-1.47;
the weight of the 4-6 functional group 1, 6-hexanediol diacrylate accounts for 10% -20% of the weight of the antireflection coating, and the refractive index of the 4-6 functional group 1, 6-hexanediol diacrylate is 1.47;
the 10-100nm nano hollow silica accounts for 30-40% of the weight of the anti-reflection coating, and the refractive index of the 10-100nm nano hollow silica is 1.33-1.38;
the weight of the diluent accounts for 20% -50% of the weight of the anti-reflection coating.
Preferably, in S2, the angle of the PET optical substrate with the predetermined orientation degree is 135 degree alignment angle or 45 degree alignment angle.
The invention discloses a protective paste for finger print under a screen, which is prepared by the preparation method of the protective paste for finger print under the screen.
The invention discloses a method for testing the polarization angle of an underscreen fingerprint protection sticker, which comprises the following steps of:
taking a mobile phone to be tested, and enabling a screen of the mobile phone to be in a white background interface, wherein the mobile phone to be tested is not attached with an under-screen fingerprint protection sticker;
obtaining a polaroid, enabling the polaroid to be tightly attached to a mobile phone screen, rotating the polaroid under a white background interface of the mobile phone screen until the mobile phone is in a completely black state when the polaroid is seen through, and recording the position of the polaroid as a test position;
attaching a lower screen fingerprint protection sticker to a mobile phone screen of a mobile phone to be tested to obtain a film-attached mobile phone;
the screen of the film-pasting mobile phone is tightly attached with the polaroid, the polaroid moves and rotates to a test position, the screen of the film-pasting mobile phone is observed through the polaroid, if the screen is completely black, the die cutting direction of the finger print protection sticker under the screen is correct, and otherwise, the screen is an unqualified product.
Compared with the prior art, the preparation method of the under-screen fingerprint protection paste has the following advantages:
1. according to the invention, the common PET film is subjected to biaxial stretching and heat setting to enable the PET film to have a preset orientation degree, and then the obtained under-screen fingerprint protection paste is coated with the anti-reflection coating, the hardening layer and the pressure-sensitive adhesive layer, so that the orientation degree is good, the sensitivity is high, and the light transmission is good.
2. The invention has the advantages of low price, convenient material acquisition, simple and easy preparation method and contribution to large-scale production.
The method for testing the polarization angle of the under-screen fingerprint protection sticker has the following advantages:
according to the invention, based on the test carried out after the actual application condition simulation test, the influence of the protection paste with different polarization angles on the unlocking performance of the fingerprint under the screen can be effectively evaluated, and whether the protection paste meets the actual application requirements or not can be found in time, so that the problem that the fingerprint unlocking sensitivity is influenced by the coated product is avoided.
Drawings
FIG. 1 is a schematic structural view of a finger print protection patch under a screen according to the present invention;
FIG. 2 is a schematic view of a 0 degree orientation die cut using a 135 degree alignment angle base film;
FIG. 3 is a schematic view of a 45 degree alignment angle base film, 90 degree direction die cut;
FIG. 4 is a schematic diagram of a mobile phone screen in a non-completely black state;
fig. 5 is a schematic diagram of the mobile phone screen in a full black state.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1 to 5, the invention discloses a preparation method of an underscreen fingerprint protection sticker, which comprises the following steps:
step one, obtaining a PET film;
and step two, carrying out biaxial stretching on the PET film, and then carrying out heat setting on the stretched PET film to obtain the PET optical substrate with the preset orientation degree, wherein the alignment angle of the PET optical substrate is consistent with the angle of the polarizer of the display screen. The angle of the PET optical substrate of the predetermined orientation degree is a 135 degree alignment angle or a 45 degree alignment angle.
Wherein, carry out biaxial stretching to PET membrane, include: longitudinally stretching the PET film at a first temperature to obtain a longitudinally stretched PET stretched film, wherein the longitudinal stretch ratio of longitudinal stretching is 3.3-4 times; and transversely stretching the longitudinally stretched PET stretched film at a second temperature to obtain the biaxially stretched PET stretched film, wherein the transverse stretch ratio of transverse stretching is 3.5-4 times.
The first temperature is 200-300 ℃, the second temperature is 100-150 ℃, and the temperature for heat setting the stretched PET film is 200-250 ℃.
And step three, coating anti-reflection coatings on two surfaces of the PET optical substrate to obtain the anti-reflection PET optical film.
The thickness of the anti-reflection coating is 100-200 nm.
The anti-reflection coating comprises 2-4 functional group polyester acrylate, 4-6 functional group 1, 6-hexanediol diacrylate, 10-100nm nanometer hollow silicon dioxide and a diluent. The weight of the 2-4 functional group polyester acrylate accounts for 10-20% of the weight of the anti-reflection coating, and the refractive index of the 2-4 functional group polyester acrylate is 1.45-1.47; the weight of the 4-6 functional group 1, 6-hexanediol diacrylate accounts for 10% -20% of the weight of the antireflection coating, and the refractive index of the 4-6 functional group 1, 6-hexanediol diacrylate is 1.47; the 10-100nm nano hollow silica accounts for 30-40% of the weight of the anti-reflection coating, and the refractive index of the 10-100nm nano hollow silica is 1.33-1.38; the weight of the diluent accounts for 20-50% of the weight of the anti-reflection coating.
And step four, coating a hardening layer on one surface of the anti-reflection PET optical film, and coating a pressure-sensitive adhesive layer on the other surface of the anti-reflection PET optical film to obtain the under-screen fingerprint protection sticker.
The invention discloses a method for testing the polarization angle of an underscreen fingerprint protection sticker, which comprises the following steps of:
taking a mobile phone to be tested, and enabling a screen of the mobile phone to be in a white background interface, wherein the mobile phone to be tested is not attached with a finger print protection sticker under the screen;
step two, obtaining a polaroid, enabling the polaroid to be tightly attached to a mobile phone screen, rotating the polaroid under a white background interface of the mobile phone screen until the mobile phone is in a completely black state when the polaroid is seen through, and recording the position of the polaroid as a test position;
thirdly, attaching a lower screen fingerprint protection sticker to the mobile phone screen of the mobile phone to be tested to obtain a film-attached mobile phone;
and step four, tightly attaching the polaroid to the screen of the film-pasting mobile phone, moving and rotating the polaroid to a test position, observing the screen of the film-pasting mobile phone through the polaroid, and if the screen is completely black, judging that the die cutting direction of the finger print protection sticker under the screen is correct, otherwise, judging that the product is unqualified.
The technical solution of the present invention is further explained and explained below with reference to specific embodiments.
Example one
Preparing a protective paste for finger print under a screen: the PET optical coating is prepared by adopting a specially formulated PET optical substrate layer with a certain polarization angle, a hardening coating and a pressure-sensitive adhesive, and carrying out micro-concave coating or slit extrusion coating, drying at a high temperature and rolling; the PET optical substrate layer of certain polarisation angle indicates, protection subsides and polaroid, and the light path to the panel can produce the double refraction influence, and it is the same with polaroid polarization direction angle to need adjustment or design protection subsides, makes protection pad membrane material light path direction and screen light path direction unanimous, and the semaphore maximize that returns sensor like this is accepted, and fingerprint unblock signal attenuation is minimum. The mobile phone length direction and the protection patch TD direction are defined to be consistent and are subjected to die cutting at an angle of 0 degree, and the mobile phone length direction and the protection patch MD direction are defined to be consistent and are subjected to die cutting at an angle of 90 degrees. The polarizer angle of a common fingerprint mobile phone screen under the screen is generally 135 degrees or 45 degrees, and for a mobile phone screen with the polarizer angle of 135 degrees, a 135-degree alignment angle base film can be adopted, 0-degree direction die cutting (shown in figure 2) is performed, a 4-station 45-degree alignment angle base film is used, 90-degree direction die cutting (shown in figure 3) is also adopted, and a 4-station 45-degree alignment angle base film is used, and a silicon-degree layer used for die cutting is downward; or 4 stations of 45-degree alignment angle base films are adopted, die cutting is carried out in the 0-degree direction, and the silicon rubber surfaces of the die-cut sheets face upwards; for a mobile phone screen with a polarizer angle of 45 degrees, 4-station 45-degree alignment angle base films can be adopted, 0-degree direction die cutting is carried out (as shown in figure 2), the silicon rubber surface of a using layer of die cutting is downward, 1-station 135-degree alignment angle base films can be adopted, 90-degree direction die cutting is carried out (as shown in figure 3), and the silicon rubber surface of the using layer of die cutting is downward; or 1 station 135 degree orientation angle base film is adopted, die cutting is carried out in the 0 degree direction, and the silicon rubber surface of the die cutting sheet is upward.
Example two
Testing the polarization angle of the finger print protection paste under the screen: the purpose of the test is to provide a convenient and practical detection method aiming at the defects of the existing detection.
The implementation of the test can be realized by the following technical measures:
firstly, a polarizer (in fig. 4, the hand is taken as the polarizer) is adopted, the polarizer is rotated under a white background interface of the mobile phone, and when the mobile phone is in a completely black state when the polarizer is seen through, the direction is the direction used for testing. Fig. 4 shows a non-full black state, and fig. 5 shows a full black state.
And step two, under the condition of keeping a full black state (the positions of the polaroid and the mobile phone are fixed), removing the release film to attach the pressure sensitive adhesive layer to the mobile phone, and observing that the mobile phone is still full black through the polaroid after film attaching, which indicates that the die cutting direction of the protection paste is correct at the moment, or else, indicates that the die cutting direction is wrong.
The detection method is based on the test carried out after the simulation test of the actual application condition, can effectively evaluate the influence of the protection pastes with different polarization angles on the unlocking performance of the fingerprint under the screen, and timely finds out whether the protection pastes meet the actual application requirements or not, thereby avoiding the problem that the fingerprint unlocking sensitivity is influenced by the coated product.
Table 1 shows the test conditions of the polarization angle of the finger print protection pad under the screen in four cases.
TABLE 1
The polarization angle test is detected according to the detection method in the invention, and the sensitivity test is qualified if the SNR reduction ratio before and after film pasting of the terminal test mobile phone in the development mode is less than 20%. As long as the polarization angle test is qualified, the sensitivity test data are all qualified, the polarization direction angles of the protective sticker and the polarizer are the same, the light path direction of the film material of the protective sticker is consistent with the light path direction of the screen, the signal quantity returned to the sensor is received in a maximized mode, and the attenuation of the fingerprint unlocking signal is minimum.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A preparation method of a protective paste for finger print under a screen is characterized by comprising the following steps:
s1, obtaining a PET film;
s2, carrying out biaxial stretching on the PET film, and then carrying out heat setting on the stretched PET film to obtain a PET optical substrate with a preset orientation degree, wherein the alignment angle of the PET optical substrate is consistent with the angle of the polarizer of the display screen;
s3, coating anti-reflection coatings on two surfaces of the PET optical substrate to obtain an anti-reflection PET optical film;
s4, coating a hardening layer on one surface of the anti-reflection PET optical film, and coating a pressure-sensitive adhesive layer on the other surface of the anti-reflection PET optical film to obtain the under-screen fingerprint protection sticker.
2. The method for preparing an under-screen fingerprint protection patch as claimed in claim 1, wherein in the step S2, the bi-directional stretching of the PET film comprises:
longitudinally stretching the PET film at a first temperature to obtain a longitudinally stretched PET stretched film, wherein the longitudinal stretch ratio of longitudinal stretching is 3.3-4 times;
and transversely stretching the longitudinally stretched PET stretched film at a second temperature to obtain a biaxially stretched PET stretched film, wherein the transverse stretch ratio of transverse stretching is 3.5-4 times.
3. The method for preparing the under-screen fingerprint protection sticker as claimed in claim 2, wherein the first temperature is 200-300 ℃; the second temperature is 100-150 ℃.
4. The method for preparing the underscreen fingerprint protection sticker as claimed in claim 1, wherein in S2, the temperature for heat setting the stretched PET film is 200-250 ℃.
5. The method for preparing the under-screen fingerprint protection sticker as claimed in claim 1, wherein in S3, the thickness of the anti-reflection coating is 100-200 nm.
6. The method for preparing an underscreen fingerprint protection sticker as claimed in claim 1, wherein the anti-reflection coating comprises 2-4 functional group polyester acrylate, 4-6 functional group 1, 6-hexanediol diacrylate, 10-100nm nanometer hollow silica and a diluent.
7. The method for preparing an underscreen fingerprint protection patch according to claim 6,
the weight of the 2-4 functional group polyester acrylate accounts for 10% -20% of the weight of the anti-reflection coating, and the refractive index of the 2-4 functional group polyester acrylate is 1.45-1.47;
the weight of the 4-6 functional group 1, 6-hexanediol diacrylate accounts for 10% -20% of the weight of the antireflection coating, and the refractive index of the 4-6 functional group 1, 6-hexanediol diacrylate is 1.47;
the 10-100nm nano hollow silica accounts for 30-40% of the weight of the anti-reflection coating, and the refractive index of the 10-100nm nano hollow silica is 1.33-1.38;
the weight of the diluent accounts for 20% -50% of the weight of the anti-reflection coating.
8. The method for preparing an under-screen fingerprint protection sticker as claimed in claim 1, wherein in S2, the angle of the PET optical substrate with the predetermined orientation degree is 135 degree alignment angle or 45 degree alignment angle.
9. An underscreen fingerprint protection sticker is characterized by being prepared by the preparation method of the underscreen fingerprint protection sticker as claimed in any one of claims 1 to 8.
10. A method for testing the polarization angle of an under-screen fingerprint protection sticker is characterized by comprising the following steps:
taking a mobile phone to be tested, and enabling a screen of the mobile phone to be in a white background interface, wherein the mobile phone to be tested is not attached with an under-screen fingerprint protection sticker;
obtaining a polaroid, enabling the polaroid to be tightly attached to a mobile phone screen, rotating the polaroid under a white background interface of the mobile phone screen until the mobile phone is in a completely black state when the polaroid is seen through, and recording the position of the polaroid as a test position;
attaching a lower screen fingerprint protection sticker to a mobile phone screen of a mobile phone to be tested to obtain a film-attached mobile phone;
the screen of the film-pasting mobile phone is tightly attached with the polaroid, the polaroid moves and rotates to a test position, the screen of the film-pasting mobile phone is observed through the polaroid, if the screen is completely black, the die cutting direction of the finger print protection sticker under the screen is correct, and otherwise, the screen is an unqualified product.
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| CN202110939195.6A CN113698880A (en) | 2021-08-16 | 2021-08-16 | Preparation method of under-screen fingerprint protection paste, under-screen fingerprint protection paste and detection method |
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| CN202110939195.6A CN113698880A (en) | 2021-08-16 | 2021-08-16 | Preparation method of under-screen fingerprint protection paste, under-screen fingerprint protection paste and detection method |
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| CN109796896A (en) * | 2019-01-23 | 2019-05-24 | 东莞市鑫博仕新材料有限公司 | There is polarisation angles hot bending protective film and preparation method thereof |
| CN109946780A (en) * | 2018-02-13 | 2019-06-28 | 华为技术有限公司 | Protective film, the method and apparatus for cutting protective film |
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| CN109946780A (en) * | 2018-02-13 | 2019-06-28 | 华为技术有限公司 | Protective film, the method and apparatus for cutting protective film |
| CN109796896A (en) * | 2019-01-23 | 2019-05-24 | 东莞市鑫博仕新材料有限公司 | There is polarisation angles hot bending protective film and preparation method thereof |
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