JP6523715B2 - Adhesive sheet and electric and electronic device provided with the same - Google Patents

Description

  The present invention relates to a pressure-sensitive adhesive sheet and an electric / electronic device provided with the same.

  In recent years, with the spread of electric and electronic devices such as mobile phones, smartphones, Fablet terminals, tablet terminals, car navigation systems, televisions, personal computers, cameras, electronic dictionaries, lighting devices, opportunities to contact artificial light sources are increasing. Among visible light emitted from these light sources, light with a wavelength of 380 nm to 495 nm called blue light (hereinafter also referred to as blue visible light) is considered to be highly stimulating to the retina of the human eye, It is said that it affects the eyes such as eye strain and dry eye.

  Various proposals have been made to reduce blue visible light, and for example, Patent Document 1 is characterized by containing a tacky resin and a blue visible light absorbing agent having a maximum absorption wavelength of 380 to 500 nm. A pressure-sensitive adhesive is disclosed, and it is known that by sticking the pressure-sensitive adhesive, a blue visible light radiation target can be viewed visually.

JP, 2014-105326, A

  However, although light transmitted through the pressure-sensitive adhesive disclosed in Patent Document 1 absorbs blue visible light, the color reproducibility with respect to the color of a light source such as an electric electronic device is low, and the color tone seen by human eyes is unnatural. May cause it.

  An object of the present invention is to provide a pressure-sensitive adhesive sheet having high color reproducibility with respect to the color of a light source such as an electric and electronic device while absorbing blue visible light.

The present invention
[1] containing an adhesive, a blue visible light absorber, and an ultraviolet light absorber,
The transmittance of 450 nm is 65.0% to 90.0%,
The average transmittance of 380 nm to 495 nm is 55.0% or more and 85.0% or less,
Formula (1):
0.40 ≦ T1 / T2 ≦ 0.70 (1)
(Wherein, T1 represents an average transmittance of 380 nm to 400 nm, and T2 represents an average transmittance of 400 nm to 420 nm)
Meet, adhesive sheet, and
[2] An electric and electronic device comprising the pressure-sensitive adhesive sheet according to [1].

  According to the present invention, it is possible to provide a pressure-sensitive adhesive sheet having high color reproducibility with respect to the color of a light source such as an electric / electronic device while absorbing blue visible light.

It is a spectrum of the transmittance | permeability of Example 1 and the comparative example 1. FIG. It is a spectrum of the transmittance | permeability of Example 1 and Comparative Example 2. FIG. It is a spectrum of the transmittance | permeability of Example 1 and Comparative Example 3. FIG.

  The conventional pressure-sensitive adhesive sheet has a maximum absorption wavelength in the blue visible light region, and absorbs only blue visible light in an extreme manner, so the color reproducibility is low. The present inventors solve the problem by setting the transmittance of the pressure-sensitive adhesive sheet within a predetermined range such that only blue visible light is not absorbed excessively with respect to the entire visible light, focusing on such a viewpoint. It has been found out that the present invention can be achieved, and the present invention has been completed through intensive studies. Hereinafter, an embodiment of the present invention will be described.

  The pressure-sensitive adhesive sheet contains a pressure-sensitive adhesive, a blue visible light absorber, and an ultraviolet light absorber.

  Examples of the pressure-sensitive adhesive include acrylic, urethane, and silicone-based pressure-sensitive adhesives, and the weather resistance of the pressure-sensitive adhesive itself, the stability to light sources of electric and electronic devices, a blue visible light absorber, and an ultraviolet light absorber are mixed. From the viewpoint of compatibility at the time, an acrylic adhesive is preferable.

The acrylic pressure-sensitive adhesive is not particularly limited, but the formula (A):
CH ₂ = CHCOOR ¹ (A)
(Wherein, R ¹ represents an alkyl group having 1 to 12 carbon atoms)
And acrylic copolymers containing as a constituent monomer.

  As constituent monomers represented by the formula (A), methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate and the like can be mentioned.

  The content of the constituent monomer represented by the formula (A) in the acrylic copolymer is preferably 60 to 98% by mass, from the viewpoint of flexibility and initial adhesion when bonding to an adherend, and 70 to 70% by mass. 95 mass% is more preferable.

  As constituent monomers other than the formula (A), 2-hydroxyethyl acrylate, acrylamide, acrylic acid and the like can be mentioned.

  The weight average molecular weight of the acrylic copolymer is preferably 500,000 to 1,500,000, and more preferably 800,000 to 1,300,000, from the viewpoint of weatherability and the production efficiency of the copolymer. Here, the weight average molecular weight of the acrylic copolymer is measured by GPC method (gel permeation chromatography), and calculated by polystyrene conversion.

The content of the pressure-sensitive adhesive in the pressure-sensitive adhesive sheet is not particularly limited, but is preferably 50% by mass or more, more preferably 60% by mass or more, and still more preferably 75% by mass or more, from the viewpoint of maintaining adhesion. From the viewpoint of mixing the absorbing dye, 99.99 mass% or less is preferable, 99.9 mass% or less is more preferable, and 99.8 mass% or less is more preferable (however,
Except when including inorganic substances such as metals as additives). In addition, when it contains 2 or more types of adhesive, content of the said adhesive points out the total amount of an adhesive.

  As the blue visible light absorber, blue visible light absorbers such as azo type, methine type and nitro type may be mentioned, and from the viewpoint of stability, methine type blue visible light absorbers are preferable.

  As a methine blue visible light absorber, a methine compound having a 5-pyrazolone skeleton and a phenyl skeleton in one molecule is more preferable from the viewpoint of blue visible light absorption, color reproducibility, and weather resistance.

  As a methine compound having a 5-pyrazolone skeleton and a phenyl skeleton in one molecule, compounds represented by the formula (B) or the formula (C) are preferable.

(Wherein, R ² and R ³ each independently represent a hydrogen atom or a methyl group)

(Wherein R ⁴ and R ⁵ each independently represent a phenyl group, and this phenyl group may be substituted with a methyl group or a halogen atom. R ⁶ and R ⁷ each independently have 1 carbon atom R 3 represents an alkyl group, and R ⁸ represents a hydrogen atom.)

  A specific compound having a 5-pyrazolone skeleton and a phenyl skeleton in one molecule is 4- (4,5-dihydro-1-phenyl-3-methyl-5-oxo-1H-pyrazol-4-ylidenemethyl)- 1-phenyl-3-methyl-1H-pyrazole-5 (4H) -one, 2-phenyl-4- (2,4-dimethylphenylazo) -5-methyl-2H-pyrazole-3 (4H) -one and the like Can be mentioned.

  The content of the blue visible light absorber in the pressure-sensitive adhesive sheet is not particularly limited, but is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, from the viewpoint of the ability to absorb light of a specific wavelength. 0.010 mass% or more is more preferable, and also from a viewpoint of preventing discoloring, and a viewpoint of preventing precipitation, 0.35 mass% or less is preferable, 0.30 mass% or less is more preferable, 0. 25 mass% or less is further more preferable. In addition, when it contains 2 or more types of blue visible light absorbers, content of the said blue visible light absorber points out the total amount of blue visible light absorbers.

  Examples of the UV absorber include UV absorbers such as triazines, benzotriazoles, and benzophenones. From the viewpoints of heat resistance, weatherability, and environmental impact, UV absorbers of triazines are preferable.

  The triazine-based ultraviolet absorber is preferably a compound represented by the formula (D).

(Wherein, R ⁹ represents a linear or branched alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, an alkenyl group having 3 to 8 carbon atoms, or 6 to 18 carbon atoms And an aryl group, an alkylaryl group having 7 to 18 carbon atoms or an arylalkyl group having 7 to 18 carbon atoms, provided that these alkyl group, cycloalkyl group, alkenyl group, aryl group, alkylaryl group or arylalkyl group The group may be substituted with a hydroxy group, a halogen atom, an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms, and an oxygen atom, a sulfur atom, a carbonyl group, an ester group or an amide group or may be interrupted by an imino group. also, the above substituted and interrupted combined good .R ¹⁰ be a hydrogen atom, 1 to carbon atoms Indicates an alkyl group or an alkenyl group having a carbon number of 3 to ^{8, R 11} represents a hydrogen atom or a hydroxy ^{group, R 12} represents a hydrogen atom or an ^{O-R 9.)}
The term "interruption" as referred to above means one containing the functional group in a linear chain.

  As a triazine-based UV absorber, 2,4-diphenyl-6- (2-hydroxy-4-methoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4) -Ethoxyphenyl) -1,3,5-triazine, 2,4-diphenyl- (2-hydroxy-4-propoxyphenyl) -1,3,5-triazine, 2,4-diphenyl- (2-hydroxy-4) -Butoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-butoxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2 -Hydroxy-4-hexyloxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-octyloxyphenyl) -1,3,5-tria 2,4-Diphenyl-6- (2-hydroxy-4-dodecyloxyphenyl) -1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-benzyloxyphenyl)- 1,3,5-triazine, 2,4-diphenyl-6- (2-hydroxy-4-butoxyethoxy) -1,3,5-triazine, 2,4-bis (2-hydroxy-4-butoxyphenyl) -6- (2,4-dibutoxyphenyl) -1,3-5-triazine, 2,4-bis (2,4-dimethylphenyl) -6- [2-hydroxy-4- (3-alkyloxy-) Ultraviolet light having a 2-hydroxypropyloxy) -5-α-cumylphenyl] -s-triazine skeleton (alkyloxy; long-chain alkyloxy group such as octyloxy, nonyloxy, decyloxy, etc.) A line absorbent etc. are mentioned.

  As a commercial item of a triazine type ultraviolet absorber, "tinuvin 1577", "tinuvin 460", "tinuvin 477" (made by Chiva Specialty Chemicals) etc. are mentioned, for example.

The triazine-based ultraviolet absorber may be solid or liquid at 25 ° C., but is preferably liquid at 25 ° C. from the viewpoint of reducing the possibility of precipitation at the time of use.
Among them, 2,4-bis (2,4-dimethylphenyl) -6- [2-hydroxy-4- (3-alkyloxy-2-hydroxypropyloxy) from the viewpoint of high compatibility and excellent absorption characteristics. More preferred is a hydroxyphenyltriazine-based ultraviolet light absorber having a 5- (5-α-cumylphenyl) -s-triazine skeleton (alkyloxy; long-chain alkyloxy group such as octyloxy, nonyloxy, decyloxy and the like).

  2- (2′-hydroxy-5-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) benzotriazole as a benzotriazole-based ultraviolet absorber And-(2'-hydroxy-3'-t-butyl-5'-methylphenyl) benzotriazole and the like.

  Examples of benzophenone-based UV absorbers include 2,4-dihydroxy-benzophenone, 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy-4-n-octoxy-benzophenone, 2-hydroxy-4-dodecyloxy-benzophenone, 2- Hydroxy-4-octadecyloxy-benzophenone, 2,2'-dihydroxy-4-methoxy-benzophenone, 2,2'-dihydroxy-4,4'-dimethoxy-benzophenone, 2,2 ', 4,4'-tetra And hydroxy-benzophenone.

  The content of the ultraviolet light absorber in the pressure-sensitive adhesive sheet is not particularly limited, but from the viewpoint of sufficiently absorbing ultraviolet light, 0.05% by mass or more is preferable, 0.1% by mass or more is more preferable, and 0.5% by mass The above is more preferable, and from the viewpoint of maintaining the adhesion property, 7.0 mass% or less is preferable, 5.0 mass% or less is more preferable, and 3.0 mass% or less is more preferable. In addition, when it contains 2 or more types of ultraviolet absorbers, content of the said ultraviolet absorber points out the total amount of an ultraviolet absorber.

  Furthermore, in the range which does not deviate from the scope of the present invention, the pressure-sensitive adhesive sheet may optionally contain other additives.

  Other additives include softeners, tackifiers, surface lubricants, leveling agents, antioxidants, corrosion inhibitors, light stabilizers, heat stabilizers, polymerization inhibitors, lubricants, inorganic or organic fillers, In addition to metal powders, antistatic agents, flame retardants, plasticizers, optional additives such as dyes and pigments other than those described in the present application can be mentioned.

  Although content in particular of the other additive in a pressure sensitive adhesive sheet is not restricted, 0.01-10 mass% is preferred.

  The transmittance at 450 nm of the adhesive sheet is 65.0% or more, preferably 67.0% or more, more preferably 70.0% or more, from the viewpoint of color reproducibility, and from the viewpoint of absorption of blue visible light It is 90.0% or less, preferably 88.0% or less, and more preferably 85.0% or less.

  The average transmittance of 380 nm to 495 nm of the adhesive sheet is 55.0% or more, preferably 58.0% or more, more preferably 60.0% or more, from the viewpoint of color reproducibility, and blue visible light absorption It is 85.0% or less from a viewpoint of, 82.0% or less is preferable, and 80.0% or less is more preferable.

  From the viewpoint of color reproducibility, the adhesive sheet preferably has an average transmittance of 380 to 780 nm of 70.0% or more, more preferably 75.0% or more, still more preferably 80.0% or more, and blue visible light From the viewpoint of absorption, 90.0% or less is preferable.

The pressure-sensitive adhesive sheet has the formula (1) from the viewpoint of color reproducibility:
0.40 ≦ T1 / T2 ≦ 0.70 (1)
(Wherein, T1 represents an average transmittance of 380 nm to 400 nm, and T2 represents an average transmittance of 400 nm to 420 nm)
Meet.

The pressure-sensitive adhesive sheet has the formula (2) from the viewpoint of color reproducibility:
0.90 ≦ T2 / T3 ≦ 0.98 (2)
And also
Formula (3):
0.92 ≦ T3 / T4 ≦ 0.99 (3)
(In each formula, T2 represents an average transmittance of 400 nm to 420 nm, T3 represents an average transmittance of 420 nm to 440 nm, and T4 represents an average transmittance of 440 nm to 495 nm)
It is preferable to satisfy

  In the present specification, the transmittance is measured by an ultraviolet visible near infrared spectrophotometer.

  In the present specification, the average transmittance is calculated by dividing the integral value of the transmittance of light in the wavelength range by the difference in wavelength.

  Although the adhesive force in particular of an adhesive sheet is not restrict | limited, For example, it can be 5-50 N / 25 mm. The measurement of adhesive force conforms to JIS Z 0237.

  The shape, size, and thickness of the pressure-sensitive adhesive sheet are not particularly limited, but may be, for example, a shape, a size, or a thickness of 5 to 200 μm that is suitable for a 0.1 to 100 inch display for electric and electronic devices .

  The adhesive sheet can be used for electric electronic devices such as mobile phones, smartphones, Fablet terminals, tablet terminals, other wearable terminals, car navigation systems, TVs, personal computers, cameras, electronic dictionaries, lighting devices, and the like, in particular, LEDs It can be used as a member for sticking to the electrical and electronic equipment in which a component such as an organic EL, a laser light source and the like is equipped with an electronic component that emits light by an exciton as a part of a product.

  As a specific embodiment in which the pressure-sensitive adhesive sheet is used as a member of an electric and electronic device, for example, a panel-like form such as glass, polycarbonate, acrylic, or a conductive film provided with an ITO film or an organic conductive material, It is used by being attached to a polarizing film, a retardation film, an optical film such as an AR film, or a functional film such as a hard coat film.

  The pressure-sensitive adhesive sheet of the present embodiment disclosed above absorbs blue visible light, but has high color reproducibility with respect to the color of a light source of an electric and electronic device or the like, so there is little discomfort in the color tone seen by human eyes.

  The method for producing the pressure-sensitive adhesive sheet of the present embodiment is not particularly limited, but the pressure-sensitive adhesive solution is formed into a release sheet by a known method such as gravure printing, spraying, dipping, roll coater method, die coater method, etc. The pressure-sensitive adhesive sheet, which is a double-sided pressure-sensitive adhesive sheet without a core material, can be produced by laminating a release sheet having a different release force.

  As the release sheet, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, synthetic resin film such as polyethylene terephthalate, rubber sheet, foam sheet, metal foil, paper, non-woven fabric or laminate of these Any suitable thin leaf can be used. In order to enhance the releasability from the pressure-sensitive adhesive layer, the surface of the release sheet may be subjected to release treatment such as silicone treatment, long-chain alkyl treatment, fluorine treatment and the like as necessary. The releasability of the release sheet can be controlled by adjusting at least one of the type of agent used for the release treatment and the coating amount.

<Production of adhesive sheet>
Examples 1 to 3
10 parts by mass of methyl acrylate (MA), 3 parts by mass of butyl acrylate (BA), 75 parts by mass of 2-ethylhexyl acrylate (2EHA), 2 parts by mass of 2-hydroxyethyl acrylate (2 HEA), and acrylamide (Am) The constituent monomer consisting of 10 parts by mass was polymerized to have a weight average molecular weight of 1,200,000 to obtain an acrylic copolymer (adhesive). A triazine-based ultraviolet absorber (trade name: Tinuvin 477 / BASF) and a methine-based blue visible light absorber (trade name: FS1002 / Arimoto Chemical Industries, Ltd.) with respect to 100 parts by mass of this adhesive. A mixture obtained by adding 0.1 part by mass of a crosslinking agent (trade name: Coronate HX, manufactured by Tosoh Corp.) was further added on a release sheet made of a PET substrate. This coating was performed such that the coating thickness after drying was 25 μm. Thereafter, it was dried at 90 ° C. for 5 minutes, and then aging was carried out for 3 days in a 60 ° C. environment to peel off the release sheet to obtain a pressure-sensitive adhesive sheet.

Comparative Examples 1 and 2
Among the formulations described in Example 1, the amounts of the ultraviolet light absorber and the blue visible light absorber added were as shown in Table 1, and a pressure-sensitive adhesive sheet was obtained in the same manner.

Comparative example 3
A pressure-sensitive adhesive sheet was obtained in the same manner as in Comparative Example 1 except that 0.3 part by mass of a black pigment (trade name: Black A-N, manufactured by Nippon Kayaku Co., Ltd.) was added instead of the blue visible light absorber.

<Blue visible light absorbency>
About the adhesive sheet produced by the Example and the comparative example, the transmittance | permeability of 450 nm with high stimulability especially among blue visible light was measured, and blue visible light absorbability was evaluated by the following references | standards. The results are shown in Table 1.
◎: The transmittance at 450 nm is less than 70 ○: The transmittance at 450 nm is 70 to 90%
X: Transmittance of 450 nm exceeds 90%

  A UV-visible near-infrared spectrophotometer (model number: UV-3150, manufactured by Shimadzu Corp.) is used to measure the transmittance in Table 1, and soda lime glass of 1 mm thickness is used as a support on one side of the adhesive sheet. The light transmittance of a sample prepared by laminating and further laminating a polyester film on the other side was measured.

<Color reproducibility>
Under the following conditions, with the adhesive sheet produced in the example or comparative example attached on the front of the PC monitor screen displaying white, a sensory test was conducted by 10 panelists as to whether or not it appeared white. The color reproducibility to the light of the light source of the electric and electronic equipment was evaluated according to the following criteria. The results are shown in Table 1. In addition, the color tone described in the parenthesis in the table is the color tone of the pressure-sensitive adhesive sheet.
PC monitor: SME1720NR Resolution 1280 × 1024 color depth 32 bit
All colors: Brightness = 0, Contrast = 50, Gamma = 1.0, Hue = 0, Saturation = 0
Red: Brightness = 0, Contrast = 50, Gamma = 1.0
Green: Lightness = 0, Contrast = 50, Gamma = 1.0
Blue: Brightness = 0, Contrast = 50, Gamma = 1.0
:: White or colored but white area with 9 or more answers ○: white or colored but white area and 6-8 answers ×: white or colored but white Field and answer less than 5

<Weatherability>
Using the sample used for the measurement of the transmittance described above, ultraviolet light from the glass surface side of the sample (irradiation conditions: frame side xenon irradiation, illuminance: 70 W / m ² , temperature and humidity conditions: B.P.T; 65 ° C. 50%) was irradiated under the following conditions, the color fading, the adhesive layer and the deterioration state of the polyester film were visually judged, and the weather resistance was evaluated according to the following criteria. The results are shown in Table 1.
Normal conditions: UV irradiation for 250 hours Severe conditions: UV irradiation for 500 hours (evaluation criteria)
◎: No discoloration of color, no deterioration of adhesive layer and polyester film observed even under severe conditions ○: No deterioration of color, adhesive layer and polyester film observed under normal conditions, but color is severe under severe conditions Slight discoloration of at least one of the adhesive layer and the polyester film is confirmed x: Degradation of color is observed under both normal conditions and severe conditions, and deterioration of the adhesive layer and at least one of the polyester film is confirmed

  From the comparison between Example and Comparative Example 1, it is understood that color reproducibility is good when T1 / T2 is 0.40 to 0.70. The spectra of the transmittances of Example 1 and Comparative Example 1 are shown in FIG. As understood from FIG. 1, in Comparative Example 1, only the blue visible light region is extremely absorbed, and the color balance is lost.

  From the comparison between the example and the comparative example 2, it is understood that there is blue visible light absorbability when the transmittance at 450 nm is 90% or less. The spectra of the transmittances of Example 1 and Comparative Example 2 are shown in FIG. Although not illustrated, the pressure-sensitive adhesive sheet of the embodiment can also absorb ultraviolet light.

  The spectra of the transmittances of Example 1 and Comparative Example 3 are shown in FIG. As can be seen from FIG. 3, in Comparative Example 3, the transmittance of the entire visible light region is uniformly low. As a result, the entire color becomes dark and lacks color reproducibility. Since the pressure-sensitive adhesive sheet of the example does not uniformly reduce the transmittance in the visible light region, it is understood that the color reproducibility is good.

  From the comparison between the examples and the comparative examples, it is understood that use of a triazine-based ultraviolet absorber has good weather resistance.

  Although not described in the table, a polyester film with a thickness of 100 μm (Cosmo Shine A4100 (made by Toyobo Co., Ltd.)) is attached as one surface to the adhesive sheet of Example 1 as a surface substrate, and adhesion to soda lime float glass It was 16.0 N / 25 mm when it measured using the test piece of 25 mm width using an autograph (made by Shimadzu, type | model number AGS500NG).

  The present invention is not limited at all by the above embodiments and examples. Various embodiments can be taken without departing from the scope of the present invention.

  The pressure-sensitive adhesive sheet of the present invention is useful as a protective sheet for electric electronic devices such as mobile phones, smartphones, Fablet terminals, tablet terminals, car navigation systems, televisions, personal computers, cameras, electronic dictionaries, lighting devices and the like.

Claims (5)

Contains an adhesive, a blue visible light absorber, and an ultraviolet light absorber,
The transmittance of 450 nm is 65.0% to 90.0%,
The average transmittance of 380 nm to 495 nm is 55.0% or more and 85.0% or less,
Formula (1):
0.40 ≦ T1 / T2 ≦ 0.70 (1)
(Wherein, T1 represents an average transmittance of 380 nm to 400 nm, and T2 represents an average transmittance of 400 nm to 420 nm)
The blue visible light absorber includes a compound having a 5-pyrazolone skeleton and a phenyl skeleton in one molecule, and the content of the blue visible light absorber is 0.001% by mass or more. . 35% by mass or less, wherein the UV absorber comprises a triazine-based UV absorber . Formula (2):
0.90 ≦ T2 / T3 ≦ 0.98 (2)
And equation (3):
0.92 ≦ T3 / T4 ≦ 0.99 (3)
(In each formula, T2 represents an average transmittance of 400 nm to 420 nm, T3 represents an average transmittance of 420 nm to 440 nm, and T4 represents an average transmittance of 440 nm to 495 nm)
The pressure-sensitive adhesive sheet according to claim 1, wherein The pressure-sensitive adhesive sheet according to claim 1 or 2 , for attaching to an electric / electronic device in which a component having an electronic component that emits light by an exciton is incorporated as a part of a product. An electric and electronic device comprising the pressure-sensitive adhesive sheet according to any one of claims 1 to 3 . The electric and electronic device according to claim 4 , which is a Fablet terminal or a wearable terminal.

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