CN108943978B - Manufacturing method of under-screen fingerprint unlocking protective film - Google Patents
Manufacturing method of under-screen fingerprint unlocking protective film Download PDFInfo
- Publication number
- CN108943978B CN108943978B CN201811067370.1A CN201811067370A CN108943978B CN 108943978 B CN108943978 B CN 108943978B CN 201811067370 A CN201811067370 A CN 201811067370A CN 108943978 B CN108943978 B CN 108943978B
- Authority
- CN
- China
- Prior art keywords
- pet
- film
- layer
- same
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 53
- 239000010410 layer Substances 0.000 claims abstract description 47
- 229920002799 BoPET Polymers 0.000 claims abstract description 25
- 239000002356 single layer Substances 0.000 claims abstract description 22
- 238000002834 transmittance Methods 0.000 claims abstract description 14
- 238000010030 laminating Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000000084 colloidal system Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000013007 heat curing Methods 0.000 claims description 3
- 229920006302 stretch film Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003075 superhydrophobic effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 4
- 230000010287 polarization Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/536—Hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/73—Hydrophobic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a manufacturing method of an under-screen fingerprint unlocking protective film, which comprises the following steps: step 1, selecting a single-roll single-layer PET base film, wherein the thickness of the single-layer PET base film is 45-55 mu m, and the phase difference delta phi is between 2700 and 2900; step 2, biaxially stretching the single-layer PET base film by using the same machine to obtain a PET stretched film, dividing the PET stretched film into a plurality of shaft numbers, and selecting an intermediate shaft number; step 3, double-layer laminating PET stretching films with the same specification and the same intermediate shaft number in the same batch are laminated in a same-roll and same-direction back-to-back mode to form a double-layer modified PET film; and step 4, overlapping more than two layers of double-layer modified PET films to form an under-screen fingerprint unlocking protective film. The under-screen fingerprint unlocking protective film has the following performance advantages: high transmittance, bottom haze; high hardness and good wear resistance; super-hydrophobic oleophobic effect; the fingerprint identification accuracy is good, and the sensitivity is high.
Description
Technical Field
The invention relates to the technical field of mobile phone protective films, in particular to a manufacturing method of an under-screen fingerprint unlocking protective film.
Background
Fingerprint unlocking recognition is completed below the screen glass, and the fingerprint recognition process is achieved through different materials mainly by utilizing infrared or optical technology. Light is a transverse wave, the propagation direction of which is consistent with the vibration direction, and factors affecting the transmittance are as follows:
1. interference of light: n light waves are mutually overlapped when meeting in space, are always strengthened in certain areas, and are always weakened in other partial areas, so that stable intensity distribution phenomenon can be caused.
2. Polarization of light: the spatial distribution of the electric vector vibration of the light waves is a phenomenon of losing symmetry with respect to the propagation direction of the light.
3. Scattering (reflection) of light: when light passes through the non-uniform medium, part of the light beam disperses and propagates away from the original direction.
Based on this, the materials with better light transmittance on the market at present are as follows: COP, PC, TAC, SRF and plain PET. Among them, COP, PC, TAC solves the interference of light and polarization of light, however these materials have their own irreparable drawbacks: COP is amorphous, and PC is linear molecule, so that light orientation is not realized, phase difference is low, and the problems of light interference and fingerprint identification sensitivity reduction caused by polarization can be perfectly avoided. However, COP is brittle and PC hardness is too low (hardness < 1H). TAC has excellent optical properties, but is not water-resistant and not sufficiently rigid. SRF and general PET solve interference and scattering of light, SRF has a high phase difference, but has poor post-processing process performance due to insufficient material rigidity. The common PET has higher mechanical strength, but lower phase difference, and only delta phi is 1000-3000.
Thus, neither COP, PC, TAC, SRF nor ordinary PET alone can be used as a finished phone protective film. It is required for those skilled in the art to develop a mobile phone protection film having high strength, light transmittance, and suitable for fingerprint unlocking.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the drawbacks of the prior art, and its primary object is to provide a method for manufacturing an under-screen fingerprint unlocking protective film, which can replace the conventional materials, does not change the light transmittance, accurately identifies the fingerprint, and has the characteristic of oil stain prevention.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a manufacturing method of an under-screen fingerprint unlocking protective film comprises the following steps of
Step 1, selecting a single-roll single-layer PET base film, wherein the thickness of the single-layer PET base film is 45-55 mu m, and the phase difference delta phi is between 2700 and 2900;
step 2, biaxially stretching the single-layer PET base film by using the same machine to obtain a PET stretched film, dividing the PET stretched film into a plurality of shaft numbers, and selecting an intermediate shaft number;
step 3, double-layer laminating PET stretching films with the same specification and the same intermediate shaft number in the same batch are laminated in a same-roll and same-direction back-to-back mode to form a double-layer modified PET film;
and step 4, overlapping more than two layers of double-layer modified PET films to form an under-screen fingerprint unlocking protective film.
As a preferred embodiment, wherein the monolayer PET substrate film in step 1 has a thickness of 50. Mu.m.
As a preferable scheme, the method for laminating the PET stretching film in the 3 rd step in a double layer manner is to compound the PET stretching film by using modified OCA optical colloid through heat curing.
As a preferred solution, the OCA optical colloid is composed of a solvent-free OCA and a hardening UV gel, wherein the solvent-free OCA has a refractive index: 1.608, refractive index of the hardened UV glue: 1.478.
as a preferable embodiment, wherein the double-layer modified PET film in the 4 th step has a refractive index of 1.655 and a tensile strength of 20 to 24Kg/m m 2 The breaking strength is 110-200%, the light transmittance is 93%, the haze is 0.36%, the thermal shrinkage is 0.5-1.0% at 150 ℃ for 30min, and the phase difference value is the same as that of the glass fiber reinforced plastic>5000。
As a preferable scheme, the 2 nd step PET stretch film is divided into 3 shaft numbers, and the intermediate shaft number 2 is selected, wherein the polarized light angle is 30 ±10 °。
As a preferable scheme, the transverse stretching rate is 130% and the longitudinal stretching rate is 300% in the 2 nd step of biaxial stretching.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and particularly, the technical scheme shows that the material selection in the step 1 is important, and a single-layer PET base film with the phase difference delta phi between 2700 and 2900 is required to be selected. Step 2, biaxially stretching the single-layer PET base film, namely stretching by using the same machine table, and selecting the same intermediate shaft number, wherein the same shaft number can ensure that the film layers have basically the same polarized light angle; and step 3, double-layer laminating PET stretching films with the same specification and the same intermediate shaft number in the same batch are laminated in the same-roll and same-direction back-to-back mode, so that the double-layer modified PET film is formed. And (3) superposing the double-layer modified PET film to a sufficient thickness for more than 2 times through the step 4, and thus obtaining the under-screen fingerprint unlocking protective film. The under-screen fingerprint unlocking protective film has the following performance advantages:
1: high transmittance, bottom haze (T is more than or equal to 92%, H is less than or equal to 0.6)
2: high hardness (2H) and good wear resistance (1000 g/500 times)
3: super-hydrophobic (theta is more than or equal to 110 DEG) oleophobic effect (fingerprint oil stain prevention)
4: the fingerprint identification accuracy is good, and the sensitivity is high.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of a single layer PET base film of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a PET stretched film obtained by biaxially stretching the single-layer PET base film of fig. 1.
FIG. 3 is a flow chart of a dual layer lamination in accordance with an embodiment of the present invention.
FIG. 4 is a graph showing the transmittance of light at different wavelengths before and after the thermal curing compounding of OCA optical colloid according to the embodiment of the present invention.
FIG. 5 is a flow chart of an embodiment of the invention for forming an under-screen fingerprint unlocking protection film by superimposing three layers of double-layer modified PET film.
The attached drawings are used for identifying and describing:
1. single-layer PET base film 2 and PET stretched film
3. Double-layer modified PET film 4 and solvent-free OCA
5. The UV glue is hardened.
Detailed Description
Referring to FIGS. 1-4, the steps of the method according to the preferred embodiment of the invention are shown, and the method for manufacturing an under-screen fingerprint unlocking protective film comprises the following steps
Step 1, selecting a single-roll single-layer PET base film 1, wherein the thickness of the single-layer PET base film 1 is 45-55 mu m, and the phase difference delta phi is between 2700 and 2900.
And 2, biaxially stretching the single-layer PET base film 1 by using the same machine to obtain a PET stretched film 2, wherein the transverse stretching rate is 130% and the longitudinal stretching rate is 300% during biaxially stretching. The PET stretch film 2 is divided into a plurality of shaft numbers, and an intermediate shaft number is selected. For example, 3 axis numbers can be divided, and intermediate axis number 2 is selected, and the polarized light angle is 30 ±10 °。
And 3, double-layer laminating of PET stretched films 2 with the same specification and the same intermediate shaft number in the same batch is performed, and the laminating mode is to select the same-roll and same-direction back-to-back laminating to form a double-layer modified PET film 3. The double-layer laminating method is to compound the optical colloid with the improved OCA through heat curing. In this embodiment, the OCA optical colloid is composed of a solvent-free OCA 4 and a hardening UV gel 5, wherein the solvent-free OCA 4 has a refractive index: refractive index of the hardened UV glue 5 1.608: 1.478.
and step 4, overlapping more than two layers of double-layer modified PET films 3 to form an under-screen fingerprint unlocking protective film.
The phase difference values of the double-layer modified PET film 3 formed by the process and the treatment of the 4 steps are as follows:
from the above data, it is clear that the phase difference of the double-layer modified PET film 3 prepared by the process of the invention is almost multiplied, the light transmittance is high, the light stability is good, and particularly, the performance of the characteristic PET material A is most outstanding. When the phase difference value is higher than 4000 or lower than 20 according to the use requirement, the invention is suitable for fingerprint unlocking under a screen, and the characteristic PET material A is used as a base material, and the phase difference value is more than 5000, so that the characteristic PET material A component is selected as the single-layer PET base film 1 in the step 1. The phase difference value of the double-layer modified PET film 3 prepared from the characteristic PET materials B and C is lower than 4000, so that the double-layer modified PET film is discarded and is not suitable for being used as a material in the step 1.
In the 3 rd step, the phase difference value can be further improved by double-layer lamination.
According to the phase difference formula:
(where n is the refractive index of the medium, λ is the wavelength in the medium, and x is the wavelength) is derived from the phase difference formula, where the phase difference is related not only to the wavelength x, but also to the refractive index of the medium.
The phase difference of the two coherent light beams at the point P is as follows:
the wavelength x and the refractive index difference are the main factors affecting the phase difference. Thus, a: the thickness (wave path difference) is selected to be appropriate within the range x is allowable, and cannot be infinite (periodicity of the optical wave). B: refractive index difference was maximized, the present invention selects (1) refractive index of pet substrate: 1.655, (2) solvent-free OCA 4 refractive index: 1.608, (3) refractive index of uv hardening layer: 1.478. thus, the transmittance spectra of light at different wavelengths before and after the OCA optical colloid is thermally cured and compounded in step 3 are shown in FIG. 4.
As can be seen from the comparison of the two curves in FIG. 3, the improved OCA optical colloid thermosetting composition is applied in the double-layer lamination, so that the protective film has excellent light transmittance, good light stability and high under-screen fingerprint unlocking sensitivity.
Through multiple tests, the double-layer modified PET film 3 prepared by the method has better mechanical property and optical property, and can be seen from experimental data in the following table
The refractive index of the double-layer modified PET film 3 is 1.655, and the tensile strength is 20-24Kg/m m 2 The breaking strength is 110-200%, the light transmittance reaches 93%, the haze is 0.36%, and the heat shrinkage is 0.5-1.0% at 150 ℃ for 30 min. The double-layer modified PET film 3 has the rigidity and flexibility of common PET, and also has higher phase difference and good polarizing effect. And 2 layers, 3 layers or 4 layers of the double-layer modified PET film 3 are overlapped to reach the use thickness of the mobile phone film, and the under-screen fingerprint unlocking protective film is manufactured. Referring to fig. 5, the double-layer modified PET film 3 was laminated 3 times to obtain a protective film.
In view of the above, the design of the present invention is focused on the importance of the material selection in step 1, and it is necessary to select a single-layer PET base film 1 having a phase difference ΔΦ between 2700 and 2900. Step 2, biaxially stretching the single-layer PET base film 1, namely stretching by using the same machine table, and selecting the same intermediate shaft number, wherein the same shaft number can ensure that the film layers have basically the same polarized light angle; and 3, double-layer laminating of PET stretched films 2 with the same specification and the same intermediate shaft number in the same batch is performed, and the laminating mode is to select the same-roll and same-direction back-to-back laminating to form a double-layer modified PET film 3. And (3) overlapping the double-layer modified PET film for more than 32 times to a sufficient thickness through the step 4, and thus obtaining the under-screen fingerprint unlocking protective film. The under-screen fingerprint unlocking protective film has the following performance advantages:
1: high transmittance, bottom haze (T is more than or equal to 92%, H is less than or equal to 0.6)
2: high hardness (2H) and good wear resistance (1000 g/500 times)
3: super-hydrophobic (theta is more than or equal to 110 DEG) oleophobic effect (fingerprint oil stain prevention)
4: the fingerprint identification accuracy is good, and the sensitivity is high.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (5)
1. A manufacturing method of an under-screen fingerprint unlocking protective film is characterized by comprising the following steps of: comprises the following steps
Step 1, selecting a single-roll single-layer PET base film, wherein the thickness of the single-layer PET base film is 45-55 mu m, and the phase difference delta phi is 2700-2900;
step 2, biaxially stretching the single-layer PET base film by using the same machine to obtain a PET stretched film, dividing the PET stretched film into a plurality of shaft numbers, and selecting an intermediate shaft number;
step 3, double-layer laminating PET stretching films with the same specification and the same intermediate shaft number in the same batch are laminated in a same-roll and same-direction back-to-back mode to form a double-layer modified PET film;
step 4, overlapping more than two layers of double-layer modified PET films to form an under-screen fingerprint unlocking protective film;
wherein, the method of double-layer lamination of the PET stretching film in the step 3 is to compound the PET stretching film by using an improved OCA optical colloid through heat curing;
the OCA optical colloid consists of solvent-free OCA and hardening UV adhesive, wherein the refractive index of the solvent-free OCA is as follows: 1.608, refractive index of the hardened UV glue: 1.478.
2. the method for manufacturing the under-screen fingerprint unlocking protective film according to claim 1, wherein the method comprises the following steps: wherein the monolayer PET substrate film in step 1 had a thickness of 50. Mu.m.
3. The method for manufacturing the under-screen fingerprint unlocking protective film according to claim 1, wherein the method comprises the following steps: wherein, the refractive index of the double-layer modified PET film in the step 4 is 1.655, the tensile strength is 20-24Kg/mm < 2 >, the breaking strength is 110-200%, the light transmittance reaches 93%, the haze is 0.36%, the heat shrinkage is 0.5-1.0% at 150 ℃ for 30min, and the phase difference value is >5000.
4. The method for manufacturing the under-screen fingerprint unlocking protective film according to claim 1, wherein the method comprises the following steps: wherein, the step 2 PET stretch film is divided into 3 shaft numbers, and the intermediate shaft number 2 is selected, and the polarized light angle is 30+/-10.
5. The method for manufacturing the under-screen fingerprint unlocking protective film according to claim 1, wherein the method comprises the following steps: wherein, in the 2 nd step of biaxial stretching, the transverse stretching rate is 130 percent and the longitudinal stretching rate is 300 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811067370.1A CN108943978B (en) | 2018-09-13 | 2018-09-13 | Manufacturing method of under-screen fingerprint unlocking protective film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811067370.1A CN108943978B (en) | 2018-09-13 | 2018-09-13 | Manufacturing method of under-screen fingerprint unlocking protective film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108943978A CN108943978A (en) | 2018-12-07 |
| CN108943978B true CN108943978B (en) | 2023-09-19 |
Family
ID=64476843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811067370.1A Active CN108943978B (en) | 2018-09-13 | 2018-09-13 | Manufacturing method of under-screen fingerprint unlocking protective film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108943978B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320943A (en) * | 2018-12-17 | 2020-06-23 | 浙江欣麟新材料技术有限公司 | PET photoelectric protective film and preparation method thereof |
| CN111334209A (en) * | 2018-12-19 | 2020-06-26 | 浙江欣麟新材料技术有限公司 | High-strength photoelectric protective film for identifying fingerprints under screen and preparation method thereof |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016060075A (en) * | 2014-09-17 | 2016-04-25 | 東レ株式会社 | Biaxially oriented polyester film, and polarizing plate and liquid crystal display using the same |
| CN105856770A (en) * | 2016-05-17 | 2016-08-17 | 东莞市纳利光学材料有限公司 | Anti-fingerprint screen protecting film and preparation method thereof |
| CN106079775A (en) * | 2016-06-29 | 2016-11-09 | 东莞市纳利光学材料有限公司 | A kind of protecting film with unlocked by fingerprint function and preparation method thereof |
| CN107533175A (en) * | 2015-06-17 | 2018-01-02 | 东丽株式会社 | Multilayer laminated film |
| CN108399352A (en) * | 2017-02-04 | 2018-08-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
-
2018
- 2018-09-13 CN CN201811067370.1A patent/CN108943978B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016060075A (en) * | 2014-09-17 | 2016-04-25 | 東レ株式会社 | Biaxially oriented polyester film, and polarizing plate and liquid crystal display using the same |
| CN107533175A (en) * | 2015-06-17 | 2018-01-02 | 东丽株式会社 | Multilayer laminated film |
| CN105856770A (en) * | 2016-05-17 | 2016-08-17 | 东莞市纳利光学材料有限公司 | Anti-fingerprint screen protecting film and preparation method thereof |
| CN106079775A (en) * | 2016-06-29 | 2016-11-09 | 东莞市纳利光学材料有限公司 | A kind of protecting film with unlocked by fingerprint function and preparation method thereof |
| CN108399352A (en) * | 2017-02-04 | 2018-08-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108943978A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108943978B (en) | Manufacturing method of under-screen fingerprint unlocking protective film | |
| CN108943979B (en) | Manufacturing method of fingerprint unlocking mobile phone protection photo-curing film | |
| JP7400724B2 (en) | multilayer laminated film | |
| JP7400725B2 (en) | multilayer laminated film | |
| JP7400723B2 (en) | multilayer laminated film | |
| KR102365801B1 (en) | Multilayer laminated film and processed article using same | |
| JP2012013822A (en) | Method for manufacturing light-reflecting film and light-reflecting film | |
| KR20210058787A (en) | Polyester protective film for flexible display device | |
| KR102198166B1 (en) | Polarizing film, polarizing plate, and manufacturing method of polarizing film | |
| KR20210071993A (en) | Polarizing plate with retardation layer and image display device using same | |
| JP7392344B2 (en) | multilayer laminated film | |
| CN110456428B (en) | Production process for improving heat resistance of optical film | |
| CN208978392U (en) | Shield lower unlocked by fingerprint protective film | |
| KR102521527B1 (en) | Polarizing plate with retardation layer and image display using the same | |
| TWI827658B (en) | Polarizing plate with retardation layer and image display device using the polarizing plate with retardation layer | |
| WO2003007025A3 (en) | Multilayer optical coating | |
| KR20210130707A (en) | Polarizing film, polarizing plate, and manufacturing method of the polarizing film | |
| KR20210071999A (en) | Polarizing plate with retardation layer and image display device using same | |
| KR102287246B1 (en) | Protection film and preperation method thereof | |
| CN110869826A (en) | Multilayer laminated film | |
| KR102309520B1 (en) | Polyester film and preperation method thereof | |
| KR102563131B1 (en) | Dyed triacetyl cellulose film, polarizing plate using the film, method for producing polarizing plate, polarizing plate with retardation layer, image display device, and image adjustment method of image display device | |
| KR20120088749A (en) | Plate-type broadband depolarizing beam splitter | |
| WO2022024798A1 (en) | Polarizing plate, polarizing plate with phase difference layer, and image display device including said polarizing plate or said polarizing plate with phase difference layer | |
| KR20170131652A (en) | Polarizing plate protective film, polarizing plate equipped therewith, liquid crystal display, and manufacturing method of polarizing plate protective film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 523000 Room 102, no.36-1, Zhongtang section, Beiwang Road, Zhongtang Town, Dongguan City, Guangdong Province Patentee after: DONGGUAN SAIYUE NEW MATERIAL TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No. 20 Fenxi Road, Dafen Community Industrial Zone, Wanjiang District, Dongguan City, Guangdong Province, 523000 Patentee before: DONGGUAN SAIYUE NEW MATERIAL TECHNOLOGY Co.,Ltd. Country or region before: China |