WO2015190600A1 - Dispositif d'affichage ayant un panneau tactile - Google Patents

Dispositif d'affichage ayant un panneau tactile Download PDF

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Publication number
WO2015190600A1
WO2015190600A1 PCT/JP2015/067036 JP2015067036W WO2015190600A1 WO 2015190600 A1 WO2015190600 A1 WO 2015190600A1 JP 2015067036 W JP2015067036 W JP 2015067036W WO 2015190600 A1 WO2015190600 A1 WO 2015190600A1
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Prior art keywords
touch panel
layer
optical film
fine particles
display panel
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PCT/JP2015/067036
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English (en)
Japanese (ja)
Inventor
尚一郎 小久見
玄 古井
淳 辻本
恒川　雅行
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大日本印刷株式会社
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Publication of WO2015190600A1 publication Critical patent/WO2015190600A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Definitions

  • the present invention relates to a display device with a touch panel.
  • a display device with a touch panel in which a touch panel is arranged on a display panel such as a liquid crystal display is known.
  • a display device with a touch panel information can be directly input by touching the image display surface with a finger or the like.
  • the display panel and the touch panel are often arranged apart from each other, that is, the display panel and the touch panel are often arranged via an air gap (air layer) (for example, , See Patent Document 1).
  • the image display surface of a display device with a touch panel may be strongly pressed not only by touching with a finger but also by a finger.
  • the touch panel is deformed, so that the distance between the touch panel and the display panel is narrowed (the thickness of the air layer is reduced), and the light reflected from the surface of the touch panel on the display panel side
  • interference fringes also referred to as Newton rings or watermarks
  • an object of the present invention is to provide a touch panel that can invisible interference fringes generated when the image display surface is strongly pressed and can suppress glare.
  • a display device with a touch panel comprising a display panel for displaying an image, and a touch panel disposed closer to an observer than the display panel, the display panel and the touch panel Is disposed through a gap, on the touch panel side surface of the display panel, and on at least one surface of the display panel side surface of the touch panel, the first light transmissive substrate, An optical film laminated on the first light-transmitting substrate, and having an uneven surface having an uneven surface in this order, and an optical film disposed so that the uneven surface of the uneven layer is on the gap side,
  • the optical film has an internal haze value of 1% or more and 30% or less, and an average inclination angle ⁇ a of the surface of the optical film of 0.074 ° or more and 2.000 ° or less.
  • Le-equipped display device is provided.
  • an optical film is provided on at least one of the surface on the touch panel side of the display panel and the surface on the display panel side of the touch panel, and the internal haze value of the optical film Is 1% or more and 30% or less, and the average inclination angle ⁇ a of the surface of this optical film is 0.074 ° or more and 2.000 ° or less, so that interference fringes generated when the image display surface is strongly pressed are It can reduce, and also can suppress glare effectively.
  • FIG. 1 is a schematic configuration diagram of a display device with a touch panel according to a first embodiment. It is a figure for demonstrating the measuring method of average inclination-angle (theta) a. It is a figure for calculating
  • FIG. 1 is a schematic configuration diagram of a display device with a touch panel according to the first embodiment.
  • the “surface of the optical film” means the surface on the concave-convex layer side (or the low refractive index layer side when a low refractive index layer is provided).
  • a display device 10 with a touch panel mainly includes a display panel 20 for displaying an image, a touch panel 40 disposed closer to the viewer than the display panel 20, and the back surface of the display panel 20. And a backlight unit 80 disposed on the side.
  • the display panel 20 is a liquid crystal display panel
  • the display device with a touch panel 10 includes the backlight unit 80.
  • the display unit 20 includes the backlight unit 80.
  • the display panel 20 and the touch panel 40 are disposed via a gap 11 such as an air gap.
  • An optical film 29 is provided on the surface of the display panel 20 on the touch panel 40 side, and no optical film or antireflection film is provided on the surface of the touch panel 40 on the display panel 20 side.
  • the display panel 20 includes a protective film 21 such as a triacetyl cellulose film (TAC film), a polarizing element 22, a retardation film 23, and a transparent film from the backlight unit 80 side toward the viewer side.
  • the adhesive layer 24, the display element 25, the transparent adhesive layer 26, the retardation film 27, and the polarizing element 28 are laminated in this order.
  • the display panel 20 only needs to include at least the display element 25 and may not include the protective film 21 or the like.
  • Examples of the retardation films 23 and 27 include a triacetyl cellulose film and a cycloolefin polymer film.
  • the retardation film 27 may be the same as the protective film 21.
  • a transparent adhesive which comprises the transparent adhesive layers 24 and 26, a pressure sensitive adhesive (PSA) is mentioned.
  • the display element 25 is a liquid crystal display element.
  • the display element is not limited to the liquid crystal display element, and may be, for example, an organic EL display element.
  • a polarizing element or a retardation film may not be provided.
  • a liquid crystal layer, an alignment film, an electrode layer, a color filter, and the like are disposed between two glass substrates.
  • the resolution of the display panel 20 is not particularly limited, but it is preferable to use a high-definition display panel having a resolution of 140 to 350 ppi.
  • the optical film according to the present invention has a high internal haze value, even when combined with such a high-definition display element, interference fringes are effectively invisible while effectively suppressing glare. can do.
  • the optical film 29 has a structure in which a first light-transmitting substrate 30, an uneven layer 31 having an uneven surface, and a low refractive index layer 32 are laminated in this order. May not have. Further, the surface 29A of the optical film 29 is an uneven surface.
  • the optical film 29 is provided on the surface of the display panel 20 on the touch panel 40 side, and is disposed via the surface 40 A of the touch panel 40 on the display panel 20 side and the gap 11.
  • the optical film 29 is disposed so that the uneven surface of the uneven layer 31 is on the gap 11 side.
  • the gap (gap) is usually an air gap (air layer), but may be a gap made of another gas instead of air.
  • a gap d between the surface 29A of the optical film 29 shown in FIG. 1 and the surface 40A of the touch panel 40 on the display panel 20 side is 50 ⁇ m or more and 1000 ⁇ m or less from the viewpoint of reducing the thickness of the display device with a touch panel. It is preferable.
  • This interval d is an interval when the observer's finger or the like is not touching the image display surface 10A.
  • the average inclination angle ⁇ a of the surface 29A of the optical film 29 is 0.074 ° or more and 2.000 ° or less.
  • the interference fringes can be effectively invisible by adjusting the average inclination angle ⁇ a of the surface 29A of the optical film 29 to 0.074 ° or more.
  • the lower limit value of the average inclination angle ⁇ a is preferably 0.11 ° or more, and more preferably 0.12 ° or more.
  • glare can be suppressed by making average inclination-angle (theta) a into 2.000 degrees or less.
  • the upper limit value of the average inclination angle ⁇ a is preferably 1.9 ° or less, and more preferably 1.5 ° or less.
  • the pitch of the interference fringes is narrower than the resolution of the human eye, the pitch is too narrow to be recognized as an interference fringe (Newton ring). For this reason, in order not to be recognized as interference fringes by the human eye, it is necessary to make the pitch of the interference fringes narrower than the resolution of the human eye.
  • the resolution of a human eye with a visual acuity 1 is 1 minute. Therefore, when the clear viewing distance is 25 cm, the human detects a light-dark stripe with a pitch of about 70 ⁇ m. be able to.
  • the sensitivity that can be detected by humans is reduced to several to several tens of times when the brightness is not rectangular but changes with gradation.
  • the interference fringes change with gradation, even if the pitch of the interference fringes (bright lines) is 300 ⁇ m, it is considered that the interference fringes cannot be recognized by human eyes. Therefore, if the pitch of the interference fringes is less than 300 ⁇ m, it is considered that the interference fringes are not recognized by human eyes.
  • red light lines R1 and R2 (hereinafter, red light bright lines are referred to as “red light lines”) are generated in A, if the pitch A is less than 300 ⁇ m from the above theory, red light Line interference fringes will not be recognized by the human eye. Therefore, hereinafter, in FIG.
  • the inclination angle ⁇ 1 when the pitch A is 300 ⁇ m is obtained.
  • the bright line of blue light and green light is generated at a pitch narrower than the bright line of red light. If the bright line of red light cannot be recognized, the bright line of blue light or green light is generated. However, it is not recognized by human eyes. Further, the first layer 100 shown in FIG. 3 is an extremely enlarged part of the first layer 100.
  • the distance B can be expressed by the following formula (3).
  • B b / 2 (3)
  • the bright red line R1 and the bright red line R2 are adjacent to each other, and the red light 105 interferes with the red light 103 and the red light 106 intensifies the red light 104.
  • the optical path difference b is one wavelength of red light, that is, 0.78 ⁇ m.
  • the tilt angle ⁇ 1 is larger than 0.074, that is, if the tilt angle ⁇ satisfies the relationship of the following formula (6), the light reflected from the surface of the second layer 102 and the first layer 100 Even if interference light is generated by interference with light reflected by the uneven surface 100A, it can be said that the interference fringe is not recognized by human eyes.
  • the following formula (7) derived from A as 200 may be satisfied.
  • the internal haze value is 1% or more and 30% or less.
  • the internal haze value refers to a haze value due to diffusion inside the film due to the composition of the film. That is, the internal haze value is a haze value excluding the influence of diffusion caused by the uneven shape on the film surface.
  • the internal diffusion is a diffusion having a large spread, and thus adjusting the internal haze value of the optical film 29 to 1% or more has an effect of suppressing a luminance change (glare). It is believed that there is.
  • the lower limit value of the internal haze value is preferably 1.5% or more, and more preferably 1.9% or more.
  • the fall of contrast and visibility can be suppressed by making an internal haze value into 30% or less.
  • the upper limit of the internal haze value is preferably 27% or less, and more preferably 20% or less.
  • the internal haze value of the optical film is obtained as follows.
  • a resin such as pentaerythritol triacrylate (including a resin component such as a monomer or an oligomer) is diluted with toluene or the like on the concavo-convex of the concavo-convex layer to obtain a solid content of 60%, and the dry film thickness becomes 8 ⁇ m with a wire bar.
  • the optical film is saponified in advance (2 mol / l NaOH (or KOH ) After soaking the solution at 55 ° C. for 3 minutes, washing with water, completely removing water droplets with Kimwipe, and drying in a 50 ° C. oven for 1 minute) may be used for hydrophilic treatment.
  • the film having a flat surface does not have haze due to surface irregularities, but has only internal haze. Therefore, this haze can be obtained as an internal haze.
  • the value which deducted the internal haze from the haze (overall haze) of the original film is calculated
  • the internal haze value and the total haze value can be measured using a haze meter such as HM-150 manufactured by Murakami Color Research Laboratory in accordance with JIS K7136.
  • the lower limit of the total haze value of the optical film 29 is preferably 1.6% or more, and more preferably 2.0% or more. Further, the upper limit value of the total haze value is preferably 41% or less, and more preferably 38% or less.
  • the arithmetic average roughness Ra of the surface 29A of the optical film 29 is preferably 0.03 ⁇ m to 0.30 ⁇ m, and the ten-point average roughness Rz is preferably 0.10 ⁇ m to 1.50 ⁇ m.
  • the definitions of “Ra” and “Rz” shall conform to JIS B0601-1994, respectively.
  • the average inclination angle ⁇ a of the unevenness present on the surface 29A of the optical film 29, the arithmetic average roughness Ra, and the ten-point average roughness Rz of the film surface are, for example, a surface roughness measuring instrument (model number: SE-3400 / The value obtained by measurement under the following measurement conditions can be used.
  • the reflection Y value measured from the surface 29A side of the optical film 29 is preferably 2.5% or less.
  • the reflection Y value is more preferably 1.5% or less, and even more preferably 1.0% or less, from the viewpoint of making the interference fringes more invisible.
  • the reflection Y value is based on JIS Z8722.
  • the reflection Y value is, for example, a reflection including diffused light reflected by the optical film when irradiated with light having an incident angle of 8 degrees from the surface side of the optical film using a spectrophotometer such as MPC3100 manufactured by Shimadzu Corporation.
  • light having an incident angle of 8 degrees means light inclined by 8 degrees with respect to the normal direction when the normal direction of the film surface of the optical film is 0 degrees.
  • the “film surface” refers to a surface that coincides with the plane direction when the target optical film is viewed as a whole and globally.
  • the optical film 29 having a reflection Y value of less than 2.5% can be obtained mainly by adjusting the composition of the uneven layer 31 and / or the low refractive index layer 32 laminated on the uneven layer 31.
  • the optical film 29 preferably has a total light transmittance of 85% or more. When the total light transmittance is 85% or more, color reproducibility and visibility can be further improved when the optical film 29 is mounted on the surface of the image display device.
  • the total light transmittance is more preferably 90% or more.
  • the total light transmittance can be measured by a method based on JIS K7361 using a haze meter (manufactured by Murakami Color Research Laboratory, product number: HM-150).
  • the transmission image definition can be measured by a transmission image definition measuring device based on the image definition transmission method of JIS K7105.
  • a transmission image definition measuring device examples include an image clarity measuring instrument (ICM-1T, manufactured by Suga Test Instruments Co., Ltd.).
  • the optical film 29 includes a first light transmissive substrate 30 and a concavo-convex layer 31 laminated on the first light transmissive substrate 30, preferably on the concavo-convex layer 31 than the concavo-convex layer 31.
  • a low refractive index layer 32 having a low refractive index is further provided. By providing such a low refractive index layer 32, there is an advantageous effect that the visibility (transmittance) of the optical film 29 is improved.
  • a low refractive index layer 32 for example, a low refractive index layer having a refractive index of 1.45 or less can be used. Below, the component of the optical film 29 is demonstrated.
  • the first light transmissive substrate 30 is not particularly limited as long as it has light transmissive properties.
  • a cellulose acylate substrate, a cycloolefin polymer substrate, a polycarbonate substrate, an acrylic substrate, a polyester substrate, Or a glass substrate is mentioned.
  • the cellulose acylate base material examples include a triacetyl cellulose base material and a diacetyl cellulose base material.
  • the triacetyl cellulose base material is a base material capable of having an average light transmittance of 50% or more in a visible light region of 380 to 780 nm.
  • the average light transmittance of the triacetyl cellulose base material is preferably 70% or more, and more preferably 85% or more.
  • triacetyl cellulose base material in addition to pure triacetyl cellulose, cellulose acetate propionate, cellulose acetate butyrate and the like may be used in combination with components other than acetic acid as a fatty acid forming an ester with cellulose. Good. Further, these triacetylcelluloses may be added with other additives such as other cellulose lower fatty acid esters such as diacetylcellulose, or plasticizers, ultraviolet absorbers, and lubricants as necessary.
  • cycloolefin polymer substrate examples include a substrate made of a polymer such as a norbornene monomer and a monocyclic cycloolefin monomer.
  • polycarbonate substrate examples include aromatic polycarbonate substrates based on bisphenols (bisphenol A and the like), aliphatic polycarbonate substrates such as diethylene glycol bisallyl carbonate, and the like.
  • acrylic base material examples include a poly (meth) methyl acrylate base material, a poly (meth) ethyl acrylate base material, a (meth) methyl acrylate- (meth) butyl acrylate copolymer base material, and the like. .
  • polyester base material examples include a base material containing at least one of polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate as a constituent component.
  • glass substrate examples include glass substrates such as soda lime silica glass, borosilicate glass, and alkali-free glass.
  • acrylic base materials are preferable from the following viewpoints.
  • the polarizing element is provided on the surface of the first light-transmitting substrate 30 on the display element side, this polarizing element may cause iodine in the polarizing element to elute due to moisture. Therefore, in order to suppress elution of iodine in the polarizing element, the first light-transmitting substrate 30 is preferably an acrylic substrate that is a substrate having low moisture permeability.
  • the thickness of the first light-transmitting substrate 30 is not particularly limited, but can be 5 ⁇ m or more and 100 ⁇ m or less.
  • the lower limit of the thickness of the first light-transmitting substrate 30 is from the viewpoint of handling properties and the like. 15 ⁇ m or more is preferable, and 25 ⁇ m or more is more preferable.
  • the upper limit of the thickness of the first light transmissive substrate 30 is preferably 80 ⁇ m or less from the viewpoint of thinning.
  • the uneven layer 31 has an uneven surface on the surface opposite to the surface on the first light-transmitting substrate 30 side.
  • the uneven layer 31 imparts an interference fringe preventing function to the surface 29A of the optical film 29 mainly due to the uneven surface.
  • the uneven layer 31 may be provided with some other function other than the interference fringe prevention property.
  • functions such as hard coat properties, antistatic properties, and antifouling properties can be imparted.
  • hard coat property is a property necessary for improving the scratch resistance of an optical film, and specifically, a pencil hardness test (specified in JIS K5600-5-4 (1999)). 4.9N load) and having a hardness equal to or higher than “H”.
  • the thickness of the uneven layer 31 is preferably 2.0 ⁇ m or more and 7.0 ⁇ m or less. If the thickness of the concavo-convex layer 31 is within this range, when the concavo-convex layer has a hard coat property, sufficient hardness can be imparted to the concavo-convex layer 31 while realizing a thin film of the concavo-convex layer. By realizing a sufficient thinning of the uneven layer 31, it is possible to suppress the occurrence of cracks and curls in the uneven layer. In addition, the thickness of the uneven
  • the concavo-convex layer 31 is, for example, (1) a method of applying a concavo-convex layer composition containing a photopolymerizable compound to be a fine particle and a binder resin after polymerization to a light-transmitting substrate, A method of embossing a mold having a concave and convex surface on the surface and then embossing a mold having a concave and convex surface on the surface, or (3) a disc shape having a concave and convex shape corresponding to the concave and convex surface on the surface.
  • the method (1) is preferable because of easy production.
  • the photopolymerizable compound when the photopolymerizable compound is polymerized (crosslinked) to become a binder resin, the photopolymerizable compound undergoes curing shrinkage in the portion where fine particles are not present, and thus shrinks as a whole. To do.
  • the portion where the fine particles are present since the fine particles do not cause curing shrinkage, only the photopolymerizable compounds existing above and below the fine particles cause curing shrinkage.
  • the film thickness of the concavo-convex layer is thicker in the portion where the fine particles are present than in the portion where the fine particles are not present, the surface of the rugged layer becomes uneven. Therefore, by appropriately selecting the type and particle size of the fine particles and the type of the photopolymerizable compound and adjusting the coating film forming conditions, the parameters (average inclination angle ⁇ a and the like) of the optical film surface can be adjusted.
  • the uneven layer contains fine particles and a binder resin
  • a concavo-convex layer containing fine particles and a binder resin can be formed by the method (1).
  • the fine particles may be either inorganic fine particles or organic fine particles, and a combination of inorganic fine particles and organic fine particles may be used. By adjusting the kind and content of the fine particles, the internal haze of the optical film can be appropriately adjusted.
  • inorganic fine particles for example, inorganic oxide fine particles such as silica (SiO 2 ) fine particles, alumina fine particles, titania fine particles, tin oxide fine particles, antimony-doped tin oxide (abbreviated as ATO) fine particles, and zinc oxide fine particles are preferable.
  • the inorganic oxide fine particles can form an aggregate in the uneven layer, and a suitable uneven surface can be formed by adjusting the aggregation degree of the aggregate.
  • the organic fine particles are made of at least one material selected from the group consisting of acrylic resin, polystyrene resin, styrene-acrylic copolymer resin, polyethylene resin, epoxy resin, silicone resin, polyvinylidene fluoride resin and polyvinyl fluoride resin. Fine particles are preferred. Of these, styrene-acrylic copolymer fine particles are preferably used.
  • the organic fine particles are appropriately adjusted in resistance to curing shrinkage that the fine particles have in the above-described curing shrinkage.
  • the resistance to shrinkage create multiple optical films containing organic fine particles with different hardness created in advance by varying the degree of three-dimensional crosslinking, and evaluate the unevenness present on the surface of the optical film. By doing so, it is preferable to select a crosslinking degree suitable for forming a suitable uneven surface.
  • the inorganic oxide particles are preferably subjected to a surface treatment.
  • the distribution of the fine particles in the concavo-convex layer 31 can be suitably controlled, and the chemical resistance and saponification resistance of the fine particles themselves can be improved.
  • the surface treatment is preferably a hydrophobizing treatment that makes the surface of the fine particles hydrophobic.
  • a hydrophobization treatment can be obtained by chemically reacting the surface of the fine particles with a surface treatment agent such as silanes or silazanes.
  • the surface treatment agent include dimethyldichlorosilane, silicone oil, hexamethyldisilazane, octylsilane, hexadecylsilane, aminosilane, methacrylsilane, octamethylcyclotetrasiloxane, and polydimethylsiloxane.
  • the fine particles are inorganic oxide fine particles, hydroxyl groups are present on the surface of the inorganic oxide fine particles.
  • the hydroxyl groups present on the surface of the inorganic oxide fine particles are reduced.
  • the specific surface area of the inorganic oxide fine particles measured by the BET method can be reduced, and the inorganic oxide fine particles can be prevented from excessively agglomerating, so that a concavo-convex layer having a suitable concavo-convex surface can be formed.
  • the inorganic oxide fine particles are preferably amorphous. This is because when the inorganic oxide particles are crystalline, the Lewis acid salt of the inorganic oxide fine particles becomes strong due to lattice defects contained in the crystal structure, and excessive aggregation of the inorganic oxide fine particles can be controlled. It is because there is a risk of disappearing.
  • the inorganic oxide fine particles When inorganic oxide particles are used as the fine particles, the inorganic oxide fine particles preferably form aggregates in the uneven layer 31.
  • This aggregate of inorganic oxide fine particles preferably has a structure in which the inorganic oxide fine particles are three-dimensionally connected in the uneven layer 31.
  • Examples of the structure in which the inorganic oxide fine particles are three-dimensionally connected include a hook shape and a string shape.
  • Aggregates having a structure in which inorganic oxide fine particles are three-dimensionally linked are easily and uniformly crushed when the photopolymerizable compound that becomes the binder resin after curing is cured and contracted. As a result, the uneven surface can be made a very smooth surface.
  • the uneven surface having a steep slope is not formed, and an uneven layer having a suitable uneven surface can be formed.
  • a concavo-convex layer having a suitable concavo-convex surface can be formed by appropriately adjusting the degree of crosslinking.
  • the content of the fine particles with respect to the uneven layer 31 is not particularly limited, but is preferably 0.1% by mass or more and 20.0% by mass or less. Since the fine particle content is 0.1% by mass or more, a suitable uneven surface can be more reliably formed, and the fine particle content is 20.0% by mass or less. Aggregation does not occur excessively, and it is possible to suppress internal diffusion and / or generation of large unevenness on the surface of the uneven layer, thereby suppressing the cloudiness.
  • the lower limit of the content of fine particles is more preferably 0.5% by mass or more, and the upper limit of the content of fine particles is more preferably 15.0% by mass or less.
  • the fine particles are preferably spherical in shape in a single particle state. Since the single particles of the fine particles are spherical, an image having excellent contrast can be obtained when the optical film is disposed on the image display surface of the image display device.
  • spherical means, for example, a true spherical shape, an elliptical spherical shape, etc., but a so-called indeterminate shape is not included.
  • the average primary particle size of the inorganic oxide fine particles is preferably 1 nm or more and 100 nm or less. Since the average primary particle size of the fine particles is 1 nm or more, a concavo-convex layer having a suitable concavo-convex surface can be formed more easily, and since the average primary particle size is 100 nm or less, Diffusion can be suppressed, and an excellent darkroom contrast can be obtained.
  • the lower limit of the average primary particle size of the fine particles is more preferably 5 nm or more, and the upper limit of the average primary particle size of the fine particles is more preferably 50 nm or less.
  • the average primary particle size of the fine particles is a value measured using an image processing software from an image of a cross-sectional electron microscope (a transmission type such as TEM or STEM and preferably having a magnification of 50,000 times or more).
  • the size of the organic fine particles is appropriately determined according to the thickness of the concavo-convex layer to be formed. preferable. If it is 1.0 ⁇ m or more, the dispersibility of the organic fine particles can be controlled well, and if it is 5.0 ⁇ m or less, the uneven shape on the surface of the uneven layer to be formed does not become too large, and the problem of glare can be suppressed well. A more preferred lower limit is 2.0 ⁇ m, and a more preferred upper limit is 4.0 ⁇ m.
  • the average particle diameter of the aggregate of the inorganic oxide fine particles is preferably 100 nm or more and 2.0 ⁇ m or less. If it is 100 nm or more, a suitable uneven surface can be easily formed, and if it is 2.0 ⁇ m or less, diffusion of light due to fine particle aggregates can be suppressed, and an image display of an optical film excellent in dark room contrast is possible. A device can be obtained.
  • the average particle diameter of the fine particle aggregate is preferably 200 nm or less at the lower limit, and preferably 1.5 ⁇ m or less at the upper limit.
  • the average particle size of the aggregates of inorganic oxide fine particles is selected from a 5 ⁇ m square area containing a large amount of aggregates of inorganic oxide fine particles based on observation with a cross-sectional electron microscope (about 10,000 to 20,000 times).
  • the particle diameter of the aggregate of inorganic oxide fine particles was measured, and the average particle diameter of the aggregate of the top 10 inorganic oxide fine particles was measured.
  • the “particle diameter of the aggregate of the inorganic oxide fine particles” is the maximum distance between the two straight lines when the cross section of the aggregate of the inorganic oxide fine particles is sandwiched between any two parallel straight lines. It is measured as the distance between straight lines in a combination of two straight lines.
  • the particle diameter of the aggregate of inorganic oxide fine particles may be calculated using image analysis software.
  • fumed silica fine particles are preferable from the viewpoint of easily forming a concavo-convex layer having a suitable concavo-convex surface among the silica particles.
  • Fumed silica is amorphous silica having a particle size of 200 nm or less prepared by a dry method, and can be obtained by reacting a volatile compound containing silicon in a gas phase. Specific examples include those produced by hydrolyzing a silicon compound such as silicon tetrachloride (SiCl 4 ) in a flame of oxygen and hydrogen. Examples of commercially available fumed silica fine particles include AEROSIL R805 manufactured by Nippon Aerosil Co., Ltd.
  • the fumed silica fine particles there are those showing hydrophilicity and those showing hydrophobicity, but among these, from the viewpoint of reducing the water absorption amount and facilitating dispersion in the composition for the uneven layer, hydrophobicity Is preferable.
  • Hydrophobic fumed silica can be obtained by chemically reacting the above-mentioned surface treatment agent with silanol groups present on the surface of the fumed silica fine particles. From the viewpoint of easily obtaining the aggregate as described above, the fumed silica is most preferably treated with octylsilane.
  • the fumed silica fine particles form aggregates
  • the aggregates of the fumed silica fine particles are not dense aggregates in the composition for the uneven layer, and are sufficiently sparse such as cocoon-like or string-like shapes. Aggregates are formed. For this reason, the agglomerates of fumed silica fine particles are easily and uniformly crushed when the photopolymerizable compound which becomes the binder resin after curing undergoes curing shrinkage. Thereby, the uneven
  • silica fine particles particularly fumed silica, is preferably used as the inorganic fine particles.
  • the binder resin is obtained by polymerizing (crosslinking) a photopolymerizable compound by light irradiation.
  • the photopolymerizable compound has at least one photopolymerizable functional group.
  • the “photopolymerizable functional group” is a functional group capable of undergoing a polymerization reaction by light irradiation.
  • Examples of the photopolymerizable functional group include ethylenic double bonds such as a (meth) acryloyl group, a vinyl group, and an allyl group.
  • the “(meth) acryloyl group” means to include both “acryloyl group” and “methacryloyl group”.
  • the light irradiated when polymerizing the photopolymerizable compound includes visible light and ionizing radiation such as ultraviolet rays, X-rays, electron beams, ⁇ rays, ⁇ rays, and ⁇ rays.
  • the photopolymerizable compound examples include photopolymerizable monomers, photopolymerizable oligomers, and photopolymerizable prepolymers, which can be appropriately adjusted and used.
  • the photopolymerizable compound a combination of a photopolymerizable monomer and a photopolymerizable oligomer or photopolymerizable prepolymer is preferable.
  • Photopolymerizable monomer has a weight average molecular weight of less than 1000.
  • the photopolymerizable monomer is preferably a polyfunctional monomer having two or more photopolymerizable functional groups (that is, bifunctional).
  • bifunctional or higher monomer examples include trimethylolpropane tri (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, and pentaerythritol tri (meth).
  • pentaerythritol triacrylate PETA
  • dipentaerythritol hexaacrylate DPHA
  • pentaerythritol tetraacrylate PETTA
  • dipentaerythritol pentaacrylate DPPA
  • the like are preferable from the viewpoint of obtaining a concavo-convex layer having high hardness.
  • the photopolymerizable oligomer has a weight average molecular weight of 1,000 or more and less than 10,000.
  • the photopolymerizable oligomer is preferably a bifunctional or higher polyfunctional oligomer.
  • Polyfunctional oligomers include polyester (meth) acrylate, urethane (meth) acrylate, polyester-urethane (meth) acrylate, polyether (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, isocyanurate (meth) Examples include acrylate and epoxy (meth) acrylate.
  • the photopolymerizable prepolymer has a weight average molecular weight of 10,000 or more, and the weight average molecular weight is preferably from 10,000 to 80,000, more preferably from 10,000 to 40,000. When the weight average molecular weight exceeds 80,000, the viscosity is high, so that the coating suitability is lowered, and the appearance of the obtained optical laminate may be deteriorated.
  • the polyfunctional polymer include urethane (meth) acrylate, isocyanurate (meth) acrylate, polyester-urethane (meth) acrylate, and epoxy (meth) acrylate.
  • thermosetting resin for other component binder resins, if necessary, solvent-drying resins (thermoplastic resins, etc., which can be used as a coating only by drying the solvent added to adjust the solid content during coating) ) And / or a thermosetting resin may be added.
  • thermoplastic resin When a solvent-drying type resin is added, film defects on the coating surface of the coating liquid can be effectively prevented when the uneven layer 31 is formed.
  • a thermoplastic resin can be used.
  • thermoplastic resins include styrene resins, (meth) acrylic resins, vinyl acetate resins, vinyl ether resins, halogen-containing resins, alicyclic olefin resins, polycarbonate resins, polyester resins, polyamide resins. , Cellulose derivatives, silicone resins and rubbers or elastomers.
  • the thermoplastic resin is preferably amorphous and soluble in an organic solvent (particularly a common solvent capable of dissolving a plurality of polymers and curable compounds).
  • an organic solvent particularly a common solvent capable of dissolving a plurality of polymers and curable compounds.
  • styrene resins from the viewpoint of transparency and weather resistance, styrene resins, (meth) acrylic resins, alicyclic olefin resins, polyester resins, cellulose derivatives (cellulose esters, etc.) and the like are preferable.
  • thermosetting resin added to the binder resin is not particularly limited.
  • the optical film 29 further includes a low refractive index layer 32 on an uneven layer 31 having an uneven surface.
  • the low refractive index layer 32 is for reducing the reflectance when external light (for example, a fluorescent lamp, natural light, etc.) is reflected on the surface of the optical film 29. Since the low refractive index layer 32 is an arbitrary layer, it may not be provided, but the visibility (transmittance) of the optical film is improved by laminating such a low refractive index layer on the uneven layer. It is preferable because the effect is obtained.
  • the low refractive index layer 32 has a refractive index lower than that of the uneven layer 31. Specifically, for example, the low refractive index preferably has a refractive index of 1.43 or less, and more preferably has a refractive index of 1.40 or less.
  • the thickness of the low refractive index layer 32 is not particularly limited as long as the unevenness of the uneven layer 31 having an uneven surface is not blocked, but it is usually set appropriately from the range of about 30 nm to 1 ⁇ m.
  • the thickness d A (nm) of the low refractive index layer 32 preferably satisfies the following formula (8).
  • d A m ⁇ / (4n A ) (8)
  • n A represents the refractive index of the low refractive index layer
  • m represents a positive odd number, preferably 1
  • ⁇ is a wavelength, preferably a value in the range of 480 nm to 580 nm.
  • the low refractive index layer 32 preferably satisfies the following formula (9) from the viewpoint of reducing the reflectance. 120 ⁇ n A d A ⁇ 145 (9)
  • the effect can be obtained with a single low refractive index layer, but it is also possible to provide two or more low refractive index layers as appropriate for the purpose of adjusting a lower minimum reflectance or a higher minimum reflectance.
  • two or more low refractive index layers it is preferable to provide a difference in the refractive index and thickness of each low refractive index layer.
  • the low refractive index layer 32 preferably includes 1) a resin containing low refractive index particles such as silica and magnesium fluoride, 2) a fluorine-based resin which is a low refractive index resin, and 3) silica or magnesium fluoride. Fluorine resin, 4) A thin film of a low refractive index material such as silica or magnesium fluoride, etc. can be used.
  • the resin other than the fluorine-based resin the same resin as the binder resin constituting the uneven layer described above can be used.
  • the silica is preferably hollow silica fine particles, and such hollow silica fine particles can be produced by, for example, a production method described in Examples of JP-A-2005-099778.
  • the low refractive index particles contained in the low refractive index layer 32 may have a nanoporous structure inside and / or at least part of the surface depending on the form, structure, aggregation state, and dispersion state of the fine particles inside the coating film. Also included are fine particles that can be formed. As specific examples, aggregates of porous silica fine particles (for example, trade names Nipsil and Nipgel manufactured by Nippon Silica Industry Co., Ltd.) and colloidal silica (silica fine particles manufactured by Nissan Chemical Industries, Ltd.) are linked in a chain shape. And colloidal silica UP series).
  • a polymerizable compound containing at least a fluorine atom in the molecule or a polymer thereof can be used.
  • a polymeric compound For example, what has hardening reactive groups, such as a photopolymerizable functional group and a thermosetting polar group, is preferable.
  • the compound which has these reactive groups simultaneously may be sufficient.
  • a polymer has no reactive group as described above.
  • Fluorine-containing monomers having an ethylenically unsaturated bond can be widely used as the photopolymerizable compound. More specifically, fluoroolefins (eg, fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, perfluorobutadiene, perfluoro-2,2-dimethyl-1,3-dioxole, etc.) are exemplified. Can do.
  • fluoroolefins eg, fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, perfluorobutadiene, perfluoro-2,2-dimethyl-1,3-dioxole, etc.
  • Examples of those having (meth) acryloyloxy groups include 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3,3-pentafluoropropyl (meth) acrylate, and 2- (perfluorobutyl).
  • thermosetting polar group examples include hydrogen bond forming groups such as a hydroxyl group, a carboxyl group, an amino group, and an epoxy group. These are excellent not only in adhesion to the coating film but also in affinity with inorganic ultrafine particles such as silica.
  • examples of the polymerizable compound having a thermosetting polar group include 4-fluoroethylene-perfluoroalkyl vinyl ether copolymer; fluoroethylene-hydrocarbon vinyl ether copolymer; epoxy, polyurethane, cellulose, phenol, polyimide, etc. Examples include fluorine-modified products of each resin.
  • the polymerizable compound having both the photopolymerizable functional group and the thermosetting polar group includes acrylic or methacrylic acid moieties and fully fluorinated alkyl, alkenyl, aryl esters, fully or partially fluorinated vinyl ethers, fully or partially. Examples thereof include fluorinated vinyl esters, fully or partially fluorinated vinyl ketones, and the like.
  • fluorine-based resin examples include the following. Polymer of monomer or monomer mixture containing at least one fluorine-containing (meth) acrylate compound of a polymerizable compound having an ionizing radiation curable group; at least one fluorine-containing (meth) acrylate compound; and methyl (meth) Copolymers with (meth) acrylate compounds that do not contain fluorine atoms in the molecule such as acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate; fluoroethylene , Fluorine-containing compounds such as vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, 3,3,3-trifluoropropylene, 1,1,2-trichloro-3,3,3-trifluoropropylene, hexafluoropropylene Monomer homopolymer or Copo
  • Silicone-containing vinylidene fluoride copolymers obtained by adding a silicone component to these copolymers can also be used.
  • the silicone components in this case include (poly) dimethylsiloxane, (poly) diethylsiloxane, (poly) diphenylsiloxane, (poly) methylphenylsiloxane, alkyl-modified (poly) dimethylsiloxane, azo group-containing (poly) dimethylsiloxane, Dimethyl silicone, phenylmethyl silicone, alkyl / aralkyl modified silicone, fluorosilicone, polyether modified silicone, fatty acid ester modified silicone, methyl hydrogen silicone, silanol group containing silicone, alkoxy group containing silicone, phenol group containing silicone, methacryl modified silicone, acrylic Modified silicone, amino modified silicone, carboxylic acid modified silicone, carbinol modified silicone, epoxy modified silicone, mercapto modified silicone Over emissions, fluorine-modified silicone
  • non-polymers or polymers composed of the following compounds can also be used as the fluororesin. That is, a fluorine-containing compound having at least one isocyanate group in the molecule is reacted with a compound having at least one functional group in the molecule that reacts with an isocyanate group such as an amino group, a hydroxyl group, or a carboxyl group.
  • Compound obtained a compound obtained by reacting a fluorine-containing polyol such as fluorine-containing polyether polyol, fluorine-containing alkyl polyol, fluorine-containing polyester polyol, fluorine-containing ⁇ -caprolactone modified polyol with a compound having an isocyanate group, etc. Can be used.
  • each binder resin as described in the uneven layer 31 can be mixed and used. Furthermore, various additives and solvents can be used as appropriate in order to improve the curing agent for curing reactive groups and the like, to improve the coating property, and to impart antifouling properties.
  • the uneven layer composition is applied to the surface of the first light-transmitting substrate 30.
  • the method for applying the uneven layer composition include known coating methods such as spin coating, dipping, spraying, slide coating, bar coating, roll coating, gravure coating, and die coating.
  • the uneven layer composition contains at least fine particles and a photopolymerizable compound.
  • the composition for the concavo-convex layer includes conventionally known dispersants, surfactants, antistatic agents, silanes depending on purposes such as increasing the hardness of the concavo-convex layer, suppressing cure shrinkage, and controlling the refractive index.
  • Coupling agent thickener, anti-coloring agent, coloring agent (pigment, dye), antifoaming agent, leveling agent, flame retardant, UV absorber, adhesion-imparting agent, polymerization inhibitor, antioxidant, surface modifier Further, an easy lubricant or the like may be added.
  • solvent examples include alcohols (eg, methanol, ethanol, propanol, isopropanol, n-butanol, s-butanol, t-butanol, benzyl alcohol, PGME, ethylene glycol), ketones (acetone, methyl ethyl ketone (MEK), cyclohexanone.
  • alcohols eg, methanol, ethanol, propanol, isopropanol, n-butanol, s-butanol, t-butanol, benzyl alcohol, PGME, ethylene glycol
  • ketones acetone, methyl ethyl ketone (MEK), cyclohexanone.
  • a solvent having a high polarity and a high volatilization rate it is preferable to contain such a solvent having a high polarity and a high volatilization rate.
  • a solvent having a high polarity and a high volatilization rate it is possible to prevent agglomeration of silica fine particles from being excessively aggregated in the uneven layer composition.
  • the solvent having a high polarity and a high volatilization rate volatilizes earlier than other solvents, so the composition in the coating film is Denature.
  • a densely distributed state can be formed.
  • the solvent having a high polarity and a high volatilization rate is preferably contained in an amount of 20% by mass or more and 50% by mass or less in the total solvent contained in the uneven layer composition.
  • a solvent having a high polarity means a solvent having a solubility parameter of 10 [(cal / cm 3 ) 1/2 ] or more
  • a solvent having a high volatilization rate means relative evaporation. It means a solvent having a speed of 150 or more. Therefore, “a solvent having a high polarity and a high volatilization rate” means a solvent that satisfies the requirements of both the “solvent having a high polarity” and the “solvent having a high volatilization rate”.
  • the solubility parameter is calculated by the method of Fedors.
  • the Fedors method is described, for example, in “SP Value Basics / Applications and Calculation Methods” (Hideki Yamamoto, published by Information Technology Corporation, 2005).
  • the solubility parameter is calculated from the following formula (10).
  • Solubility parameter [ ⁇ E coh / ⁇ V] 2 (10) Where Ecoh is the cohesive energy density and V is the molar molecular volume. Based on E coh and V determined for each atomic group, the solubility parameter can be calculated by obtaining ⁇ E coh and ⁇ V, which is the sum of E coh and V.
  • Examples of the solvent having a high polarity and a high volatilization rate include ethanol and isopropyl alcohol, and isopropyl alcohol is preferably used.
  • the polymerization initiator is a component that is decomposed by light irradiation to generate radicals to initiate or advance polymerization (crosslinking) of the photopolymerizable compound.
  • the polymerization initiator is not particularly limited as long as it can release a substance that initiates radical polymerization by light irradiation.
  • the polymerization initiator is not particularly limited, and known ones can be used. Specifically, for example, acetophenones, benzophenones, Michler benzoylbenzoate, ⁇ -amyloxime ester, thioxanthones, propiophenone , Benzyls, benzoins, acylphosphine oxides. Further, it is preferable to use a mixture of photosensitizers, and specific examples thereof include n-butylamine, triethylamine, poly-n-butylphosphine and the like.
  • the binder resin is a resin system having a radically polymerizable unsaturated group
  • the content of the polymerization initiator in the uneven layer composition is preferably 0.5 parts by mass or more and 10.0 parts by mass or less with respect to 100 parts by mass of the photopolymerizable compound.
  • the content ratio (solid content) of the raw material in the uneven layer composition is not particularly limited, but is usually preferably 5% by mass to 70% by mass, and more preferably 25% by mass to 60% by mass.
  • Leveling agent for example, silicone oil, fluorine-based surfactant and the like are preferable because the uneven layer has a Benard cell structure.
  • a resin composition containing a solvent is applied and dried, a surface tension difference or the like is generated between the coating film surface and the inner surface in the coating film, thereby causing many convections in the coating film.
  • the structure generated by this convection is called a Benard cell structure, and causes a problem such as the skin and coating defects in the uneven layer to be formed.
  • the unevenness of the surface of the uneven layer may become too large.
  • this convection can be prevented, so that not only a concavo-convex layer free from defects and unevenness can be obtained, but also the concavo-convex shape on the surface of the concavo-convex layer can be easily adjusted.
  • the method for preparing the composition for the uneven layer is not particularly limited as long as each component can be uniformly mixed.
  • the composition can be performed using a known apparatus such as a paint shaker, a bead mill, a kneader, or a mixer.
  • the concavo-convex layer composition After applying the concavo-convex layer composition to the surface of the first light-transmitting substrate 30, it is transported to a heated zone for drying the coating-like concavo-convex layer composition, and various known methods Then, the composition for the uneven layer is dried to evaporate the solvent.
  • the distribution state of the aggregates of the fine particles can be adjusted by selecting the solvent relative evaporation rate, solid content concentration, coating solution temperature, drying temperature, drying air speed, drying time, solvent atmosphere concentration in the drying zone, and the like. .
  • a method of adjusting the distribution state of the fine particle aggregates by selecting drying conditions is simple and preferable.
  • the drying temperature is preferably 30 to 120 ° C. and the drying wind speed is preferably 0.2 to 50 m / s.
  • the drying treatment appropriately adjusted within this range is performed once or a plurality of times to thereby form fine particles.
  • the distribution state of the aggregate can be adjusted to a desired state.
  • the uneven layer 31 is formed by curing the uneven layer composition by irradiating the film-like uneven layer composition with light such as ultraviolet rays to polymerize (crosslink) the photopolymerizable compound.
  • ultraviolet rays In the case where ultraviolet rays are used as the light for curing the uneven layer composition, ultraviolet rays emitted from ultra-high pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, carbon arcs, xenon arcs, metal halide lamps, and the like can be used. Further, as the wavelength of ultraviolet rays, a wavelength range of 190 to 380 nm can be used.
  • the electron beam source include various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type.
  • the low refractive index layer 32 can be formed on the concavo-convex layer 31 formed by the above procedure as necessary.
  • the viscosity of the composition for the low refractive index layer to which the above-described materials are added is 0.5 to 5 mPa ⁇ s (25 ° C.), preferably 0.7 to It is preferable to set it as the range of 3 mPa * s (25 degreeC).
  • the curing means of the composition for a low refractive index layer may be the same as that described for the uneven layer 31 described above.
  • a heating means it is preferable to add a thermal polymerization initiator that generates, for example, a radical by heating to start polymerization of the polymerizable compound, to the fluororesin composition.
  • the touch panel 40 includes a sensor unit 50, a cover glass 70 disposed on the viewer side from the sensor unit 50, and a transparent adhesive layer 42 for fixing the sensor unit 50 and the cover glass 70.
  • the touch panel 40 only needs to include the sensor unit 50 and may not include the cover glass 70 and the transparent adhesive layer 42.
  • the sensor unit 50 is a part that functions as a sensor of the touch panel 40. Although it does not specifically limit as the sensor part 50, For example, the sensor used for a projection capacitive system is mentioned. 1 includes a base film 51 provided with a patterned conductive layer 52 and a base film 51 provided with a patterned conductive layer 53 via a transparent adhesive layer 54. It has a laminated structure.
  • the base film 51 shown in FIG. 1 includes a light transmissive base material 55, a hard coat layer 56 provided on one surface of the light transmissive base material 55, and a high coat provided on the hard coat layer 56.
  • a refractive index layer 57, a low refractive index layer 58 provided on the high refractive index layer 57, and a hard coat layer 59 laminated on the other surface of the light transmissive substrate 55 are provided.
  • a light-transmitting substrate a hard coat layer provided on one surface of the light-transmitting substrate, a high refractive index layer provided on the hard coat layer, and a high refraction
  • a low refractive index layer provided on the refractive index layer
  • a hard coat layer provided on the other surface of the light-transmitting substrate
  • a high refractive index layer provided on the hard coat layer
  • the high refractive index You may use the base film provided with the low-refractive-index layer laminated
  • the light transmissive substrate 55 As the light transmissive substrate 55, the hard coat layer 56, the high refractive index layer 57, and the low refractive index layer 58, a light transmissive substrate, a hard coat layer, and a high refractive index layer used in a normal touch panel sensor are used. , And a low refractive index layer can be used, and the description is omitted here.
  • the shape of the conductive layers 52 and 53 is not particularly limited, and examples thereof include a square shape and a stripe shape.
  • the conductive layers 52 and 53 are connected to a terminal portion (not shown) through an extraction pattern (not shown).
  • the conductive layers 52 and 53 have shown the example comprised from the transparent conductive material, a conductive layer can be comprised from a mesh-shaped conducting wire.
  • Transparent conductive materials include tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO), zinc oxide, indium oxide (In 2 O 3 ), aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), oxidation Examples thereof include metal oxides such as tin, zinc oxide-tin oxide, indium oxide-tin oxide, and zinc oxide-indium oxide-magnesium oxide.
  • Examples of the conductive wire material include light-shielding metal materials such as silver, copper, aluminum, and alloys thereof.
  • the film thickness of the conductive layers 52 and 53 is appropriately set according to the specification of electrical resistance, but is preferably 10 nm or more and 50 nm or less, for example.
  • the formation method of the conductive layers 52 and 53 is not particularly limited, and a sputtering method, a vacuum deposition method, an ion plating method, a CVD method, a coating method, a printing method, or the like can be used.
  • Examples of the method for patterning the conductive layer include a photolithography method.
  • the width of the lead wire is preferably 1 ⁇ m or more and 20 ⁇ m or less, and more preferably 2 ⁇ m or more and 15 ⁇ m or less.
  • the conductive layer When the conductive layer is composed of a mesh-shaped conductor, the conductive layer has, for example, a rectangular opening formed by the conductor.
  • the aperture ratio of the conductive layer is appropriately set according to the characteristics of the image light emitted from the display device, and is in the range of 80% to 90%, for example. Further, the arrangement pitch of the openings is appropriately set within a range of 100 ⁇ m or more and 1000 ⁇ m or less in accordance with the required aperture ratio and the value of the conductor width.
  • the optical film 29 having an internal haze value of 1% or more and 30% or less and an average inclination angle ⁇ a of the surface 29A of 0.074 ° or more and 2.000 ° or less is provided on the display panel 20. Therefore, when the image display surface 10A is strongly pressed, the light reflected by the surface 40A on the display panel side of the touch panel 40 and the surface 29A of the optical film 29 provided on the display panel 20 are reflected. Interference fringes (also referred to as Newton rings or watermarks) caused by interference with the light to be generated can be made invisible, and glare can be suppressed.
  • Interference fringes also referred to as Newton rings or watermarks
  • the interference fringes are not recognized by human eyes, and the interference fringes are effectively invisible. be able to.
  • the internal haze value is adjusted to the above range, light is diffused with a large spread, and glare can be effectively suppressed.
  • the optical film 29 is provided on the display panel 20, glare can be more effectively suppressed. Even when the touch panel 40 is strongly pressed with a finger or the like, the surface 40A of the touch panel 40 on the display panel 20 side and the surface 29A of the optical film 29 provided on the display panel 20 come into contact with each other. Since the contact area between the surface 40A of the touch panel 40 and the surface 29A of the optical film 29 is reduced due to the unevenness of the surface 29A of the 29, there is an advantage that sticking is effectively suppressed.
  • FIG. 4 is a schematic configuration diagram of a display device with a touch panel according to the second embodiment.
  • the display device with a touch panel 110 according to the second embodiment shown in FIG. 4 is mainly a display for displaying an image, like the display device with a touch panel 10 according to the first embodiment shown in FIG. A panel 20, a touch panel 40 disposed closer to the viewer than the display panel 20, and a backlight unit 80 disposed on the back side of the display panel 20 are provided.
  • the display panel 20 is a liquid crystal display panel
  • the display device with a touch panel 110 includes the backlight unit 80.
  • the backlight unit 80 is provided.
  • the display panel 20 and the touch panel 40 are disposed via a gap 111 such as an air gap.
  • an optical film 29 is provided so that the uneven surface of the uneven layer 31 is on the gap 111 side, and the optical film 29 and the display panel 20 side of the touch panel 40 are provided.
  • a transparent adhesive layer 41 may be provided between these surfaces. Note that an optical film or an antireflection film is not provided on the surface 20A of the display panel 20 on the touch panel 40 side.
  • the optical film 29 having an internal haze value of 1% to 30% and an average inclination angle ⁇ a of the surface 29A of 0.074 ° to 2.000 ° is provided on the touch panel 40. Therefore, when the image display surface 110A is strongly pressed, the light reflected on the surface 29A of the optical film 29 provided on the touch panel 40 and the surface 20A on the touch panel 40 side of the display panel 20 are reflected. Interference fringes (also referred to as Newton rings or watermarks) generated by interference with light can be made invisible, and glare can be suppressed.
  • the interference fringes are not recognized by human eyes, and the interference fringes are effectively invisible. be able to.
  • the internal haze value is adjusted to the above range, light is diffused with a large spread, and glare can be effectively suppressed.
  • the optical film 29 Due to the presence of the unevenness on the surface 29A, the contact area between the surface 29A of the optical film 29 and the surface 20A of the display panel 20 becomes small, so that there is an advantage that sticking is effectively suppressed.
  • FIG. 5 is a schematic configuration diagram of a display device with a touch panel according to the third embodiment.
  • the display device with a touch panel 210 according to the third embodiment shown in FIG. 5 is mainly a display for displaying an image, like the display device with a touch panel 10 according to the first embodiment shown in FIG. A panel 20, a touch panel 40 disposed closer to the viewer than the display panel 20, and a backlight unit 80 disposed on the back side of the display panel 20 are provided.
  • the display panel 20 is a liquid crystal display panel
  • the display device with a touch panel 210 includes the backlight unit 80.
  • the backlight unit 80 is provided.
  • the display panel 20 and the touch panel 40 are disposed via a gap 211 such as an air gap.
  • An optical film 29 is provided on the surface of the display panel 20 on the touch panel 40 side so that the uneven surface of the uneven layer 31 is on the gap 211 side, and the surface of the touch panel 40 on the display panel 20 side is further provided.
  • An optical film 29 is also provided on the uneven layer 31 so that the uneven surface of the uneven layer 31 is on the gap 211 side.
  • a transparent adhesive layer 41 may be provided between the optical film 29 and the surface of the touch panel 40 on the display panel 20 side.
  • the internal haze value is 1% or more and 30% or less, and the average inclination angle ⁇ a of the surface 29A is 0.074 ° or more and 2.000 ° or less. Since the optical film 29 is provided, the light reflected on the surface 29A of the optical film 29 provided on the touch panel 40 and the display panel 20 when the image display surface 210A is strongly pressed. Interference fringes (also referred to as Newton rings or watermarks) generated by interference with the light reflected by the surface 29A of the optical film 29 can be made invisible and glare can be suppressed.
  • the interference fringes are not recognized by human eyes, and the interference fringes are effectively invisible. be able to.
  • the internal haze value is adjusted to the above range, light is diffused with a large spread, and glare can be effectively suppressed.
  • the touch panel 40 is strongly pressed with a finger or the like, the surface 29A of the optical film 29 provided on the touch panel 40 and the surface 29A of the optical film 29 provided on the display panel 20 come into contact with each other. Because of the unevenness of the surface 29A of the optical film 29, the contact area between the surfaces 29A of the optical film 29 provided on both the touch panel 40 and the display panel 20 is reduced, so that sticking is effectively suppressed. There is an advantage that.
  • FIG. 6 is a schematic configuration diagram of a display device with a touch panel according to the fourth embodiment.
  • the display device with a touch panel 310 according to the fourth embodiment shown in FIG. 6 is mainly a display for displaying an image, like the display device with a touch panel 10 according to the first embodiment shown in FIG. A panel 20, a touch panel 40 disposed closer to the viewer than the display panel 20, and a backlight unit 80 disposed on the back side of the display panel 20 are provided.
  • the display panel 20 is a liquid crystal display panel
  • the display device with a touch panel 110 includes the backlight unit 80.
  • the backlight unit 80 is provided.
  • the display panel 20 and the touch panel 40 are disposed via a gap 311 such as an air gap.
  • the display device with a touch panel includes an optical film on one surface of the surface on the touch panel side of the display panel and the surface on the display panel side of the touch panel, the surface on the touch panel side of the display panel, and A second light-transmitting substrate, a hard coat layer laminated on the second light-transmitting substrate, and a hard coat on the surface of the touch panel on the display panel side where no optical film is provided
  • An antireflection film further comprising an antireflection layer laminated on the layers in this order is further provided.
  • an optical film 29 is provided on the surface of the display panel 20 on the touch panel 40 side so that the uneven surface of the uneven layer 31 is on the gap 311 side.
  • An antireflection film 60 is further provided on the surface so that an antireflection layer 63 described later is disposed on the gap 311 side.
  • a transparent adhesive layer 41 may be provided between the antireflection film 60 and the surface of the touch panel 40 on the display panel 20 side.
  • the antireflection film 60 is separated from the optical film 29.
  • the gap distance d between the surface 29A of the optical film 29 and the surface 60A of the antireflection film 60 shown in FIG. 6 is preferably 50 ⁇ m or more and 1000 ⁇ m or less from the viewpoint of thinning the display device with a touch panel. .
  • This interval d is an interval when the observer's finger or the like is not touching the image display surface 310A.
  • the antireflection film 60 has a structure in which a second light-transmitting substrate 61, a hard coat layer 62, and an antireflection layer 63 are laminated in this order toward the display panel 20 side. Since the second light transmissive substrate 61 is the same as the first light transmissive substrate 30, the description thereof will be omitted here.
  • the hard coat layer 62 a hard coat layer used for a general antireflection film can be used.
  • the antireflection layer 63 an antireflection layer used for a general antireflection film can be used, and the configuration and composition are not particularly limited.
  • the antireflection layer 63 may include a high refractive index layer 64 and a low refractive index layer 65 provided on the high refractive index layer 64, but is not limited thereto, and the low refractive index layer 65 is not limited thereto. It may consist only of.
  • the optical film 29 having an internal haze value of 1% or more and 30% or less and an average inclination angle ⁇ a of the surface 29A of 0.074 ° or more and 2.000 ° or less is provided on the display panel 20. Therefore, when the image display surface 310A is strongly pressed, the light reflected by the surface 60A of the antireflection film 60 provided on the touch panel 40 and the optical film 29 provided on the display panel 20 are provided. Interference fringes (also referred to as Newton rings or watermarks) generated by interference with the light reflected by the surface 29A can be made invisible, and glare can be suppressed.
  • the interference fringes are not recognized by human eyes, and the interference fringes are effectively invisible. be able to.
  • the internal haze value is adjusted to the above range, light is diffused with a large spread, and glare can be effectively suppressed.
  • the optical film 29 is provided on the display panel 20, glare can be more effectively suppressed.
  • the touch panel 40 is strongly pressed with a finger or the like, the surface 60A of the antireflection film 60 provided on the touch panel 40 and the surface 29A of the optical film 29 provided on the display panel 20 come into contact with each other.
  • the contact area between the surface 29A of the optical film 29 and the surface 60A of the antireflection film 60 is reduced due to the unevenness of the surface 29A of the optical film 29, there is an advantage that sticking is effectively suppressed. .
  • composition 1 for uneven layer Organic fine particles (acryl-styrene copolymer particles, average particle size 2.0 ⁇ m, refractive index 1.55, manufactured by Sekisui Plastics Co., Ltd.): 3 parts by mass Fumed silica (octylsilane treatment, average particle size 12 nm, Nippon Aerosil Co., Ltd.): 1 part by mass, pentaerythritol tetraacrylate (PETTA) (Product name: PETA, manufactured by Daicel Cytec Co., Ltd.): 60 parts by mass, urethane acrylate (Product name: UV1700B, manufactured by Nippon Synthetic Chemical Co., Ltd., weight average) Molecular weight 2000, functional group number 10): 40 parts by mass Polymerization initiator (Irgacure 184, manufactured by BA
  • composition 2 for uneven layer Organic fine particles (acryl-styrene copolymer particles, average particle size 3.5 ⁇ m, refractive index 1.55, manufactured by Sekisui Plastics Co., Ltd.): 12 parts by mass Fumed silica (octylsilane treatment, average particle size 12 nm, Nippon Aerosil Co., Ltd.): 3 parts by mass, pentaerythritol tetraacrylate (PETTA) (Product name: PETA, manufactured by Daicel Cytec Co., Ltd.): 60 parts by mass, urethane acrylate (Product name: UV1700B, Nippon Synthetic Chemical Co., Ltd., weight average) Molecular weight 2000, functional group number 10): 40 parts by mass Polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass Polyether-modified silicone (TSF4460, manufactured by Momentive Performance Materials): 0.025 mass Parts / Toluene:
  • composition 3 for uneven layer Organic fine particles (polystyrene particles, average particle size 3.5 ⁇ m, refractive index 1.60, manufactured by Soken Chemical Co., Ltd.): 15 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, manufactured by Daicel-Cytec) 60 parts by mass-polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass-polyether-modified silicone (TSF4460, manufactured by Momentive Performance Materials): 0.025 parts by mass-Toluene: 105 parts by mass- Cyclohexanone: 35 parts by mass
  • PETA Pentaerythritol triacrylate
  • TSF4460 mass-polyether-modified silicone
  • composition 4 for uneven layer Organic fine particles (polystyrene particles, average particle size 3.5 ⁇ m, refractive index 1.60, manufactured by Soken Chemical Co., Ltd.): 17 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, manufactured by Daicel-Cytec) 60 parts by mass-polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass-polyether-modified silicone (TSF4460, manufactured by Momentive Performance Materials): 0.025 parts by mass-Toluene: 105 parts by mass- Cyclohexanone: 35 parts by mass
  • PETA Pentaerythritol triacrylate
  • TSF4460 mass-polyether-modified silicone
  • composition 5 for uneven layer Amorphous silica particles (inorganic fine particles, hydrophobization treatment, average particle diameter (laser diffraction scattering method) 2.7 ⁇ m, manufactured by Fuji Silysia): 7 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, Daicel ⁇ Cytec Co., Ltd.): 60 parts by mass Polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass Polyether-modified silicone (TSF 4460, manufactured by Momentive Performance Materials): 0.025 parts by mass Toluene: 150 parts by massMethyl isobutyl ketone (MIBK): 35 parts by mass
  • Organic fine particles (polystyrene particles, average particle size 3.0 ⁇ m, refractive index 1.60, manufactured by Sekisui Plastics Co., Ltd.): 10 parts by massInorganic fine particles (average primary particle size 12 nm, reactive functional groups introduced on the surface) Silica, solvent MIBK, solid content 30%, manufactured by Nissan Chemical Co., Ltd .: 160 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, manufactured by Daicel Cytec): 10 parts by mass Urethane acrylate (Product name) : UV1700B, manufactured by Nippon Synthetic Chemical Co., Ltd., weight average molecular weight 2000, functional group number 10): 40 parts by mass / polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass / polyether-modified silicone (TSF4460, Momentive Performance) ⁇ Materials Co., Ltd .: 0.1 parts by mass
  • Pentaerythritol tetraacrylate (Product name: PETA, manufactured by Daicel Cytec): 60 parts by mass Urethane acrylate (Product name: UV1700B, manufactured by Nippon Synthetic Chemical Co., Ltd., weight average molecular weight 2000, functional group number 10): 40 Mass parts / polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 mass parts / polyether-modified silicone (TSF4460, manufactured by Momentive Performance Materials): 0.025 mass parts / Toluene: 105 mass parts / isopropyl Alcohol: 30 parts by massCyclohexanone: 15 parts by mass
  • composition 8 for uneven layer Organic fine particles (acryl-styrene copolymer particles, average particle size 5.0 ⁇ m, refractive index 1.56, manufactured by Sekisui Plastics Co., Ltd.): 8 parts by mass Amorphous silica (average particle size 1.5 ⁇ m): 6 Part by mass-Pentaerythritol triacrylate (PETA) (Product name: PETIA, manufactured by Daicel-Cytec): 90 parts by mass-PMMA polymer (molecular weight: 75000): 10 parts by mass-Polymerization initiator (Irgacure 184, manufactured by BASF Japan) : 5 parts by mass-Polyether-modified silicone (TSF4460, manufactured by Momentive Performance Materials): 0.025 parts by mass-Toluene: 150 parts by mass-Cyclohexanone: 80 parts by mass
  • composition for hard coat layer Each component was mix
  • Dipentaerythritol hexaacrylate (Product name: KAYARAD DPHA, manufactured by Nippon Kayaku Co., Ltd.): 100 parts by mass Polymerization initiator (Irgacure 184, manufactured by BASF Japan): 5 parts by mass Leveling agent (Product name: F-568) DIC, Inc.): 0.1 parts by mass (100% solid content conversion value) ⁇ Methyl isobutyl ketone (MIBK): 120 parts by mass
  • composition 1 for low refractive index layer Hollow silica fine particles (solid content of hollow silica fine particles: 20% by mass, solution: methyl isobutyl ketone, average particle size: 60 nm): 30 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, Daicel Cytec) 10 parts by mass / polymerization initiator (Irgacure 127; manufactured by BASF Japan): 0.35 parts by mass / modified silicone oil (X22164E; manufactured by Shin-Etsu Chemical Co., Ltd.): 0.5 parts by mass / methyl isobutyl ketone (MIBK) ): 320 parts by mass ⁇ Propylene glycol monomethyl ether acetate (PGMEA): 160 parts by mass
  • composition 2 for low refractive index layer Hollow silica fine particles (solid content of hollow silica fine particles: 20% by mass, solution: methyl isobutyl ketone, average particle size: 60 nm): 70 parts by mass Pentaerythritol triacrylate (PETA) (Product name: PETIA, Daicel Cytec) 10 parts by mass / polymerization initiator (Irgacure 127; manufactured by BASF Japan): 0.35 parts by mass / modified silicone oil (X22164E; manufactured by Shin-Etsu Chemical Co., Ltd.): 0.5 parts by mass / methyl isobutyl ketone (MIBK) ): 500 parts by mass ⁇ Propylene glycol monomethyl ether acetate (PGMEA): 160 parts by mass
  • PETA Pentaerythritol triacrylate
  • MIBK methyl isobutyl ketone
  • Example 1 A 40 ⁇ m thick triacetyl cellulose resin film (Konica Minolta Co., Ltd., KC4UAW) as a light-transmitting substrate was prepared, and the uneven layer composition 1 was applied to one side of the triacetyl cellulose resin film, Formed. Next, 70 ° C. dry air was passed through the formed coating film at a flow rate of 0.2 m / s for 15 seconds, and then 70 ° C. dry air was passed through for 30 seconds at a flow rate of 10 m / s.
  • KC4UAW triacetyl cellulose resin film
  • the solvent in the coating film is evaporated, and the coating film is cured by irradiating ultraviolet rays under a nitrogen atmosphere (oxygen concentration of 200 ppm or less) so that the integrated light quantity becomes 100 mJ / cm 2.
  • An uneven layer at the time of curing was formed.
  • the said composition 1 for low refractive index layers was apply
  • 40 ° C. dry air was passed through the formed coating film at a flow rate of 0.2 m / s for 15 seconds, and then 40 ° C. dry air was passed through for 30 seconds at a flow rate of 10 m / s.
  • the coating film is cured by irradiating ultraviolet rays with a cumulative amount of light of 100 mJ / cm 2 under a nitrogen atmosphere (oxygen concentration of 200 ppm or less). A low refractive index layer (at the time of curing) was formed. As a result, an optical film according to Sample 1 was produced.
  • ⁇ Sample 2> a concavo-convex layer having a thickness of 5 ⁇ m (during curing) was formed in the same manner as Sample 1 by using the concavo-convex layer composition 2 instead of the concavo-convex layer composition 1. In sample 2, the low refractive index layer is not formed. Thus, an optical film according to Sample 2 was produced.
  • Sample 3 was formed in the same manner as Sample 2 except that the uneven layer having a thickness of 4.5 ⁇ m (during curing) was formed using the uneven layer composition 3 instead of the uneven layer composition 2. Such an optical film was produced.
  • Sample 4 was formed in the same manner as Sample 2 except that the uneven layer having a thickness of 4.0 ⁇ m (when cured) was formed using the uneven layer composition 4 instead of the uneven layer composition 3. Such an optical film was produced.
  • Sample 6 was prepared in the same manner as Sample 2, except that the uneven layer having a thickness of 2.0 ⁇ m (during curing) was formed using the uneven layer composition 5 instead of the uneven layer composition 2. Such an optical film was produced.
  • Sample 7 In Sample 7, the uneven layer composition 6 was used in place of the uneven layer composition 2, and the uneven layer having a thickness of 6.0 ⁇ m (during curing) was used to form Sample 7 in the same manner as Sample 2. An optical film was produced.
  • Sample 8 was used in the same manner as Sample 2, except that the uneven layer having a thickness of 4.0 ⁇ m (during curing) was formed using the uneven layer composition 7 instead of the uneven layer composition 2. An optical film was produced.
  • Sample 9 the uneven layer having a thickness of 4.0 ⁇ m (during curing) was formed using the uneven layer composition 8 instead of the uneven layer composition 2, and the sample 9 was formed in the same manner as in Sample 2. Such an optical film was produced.
  • Sample 10 a hard coat layer having a thickness of 8.0 ⁇ m (during curing) is formed using the hard coat layer composition instead of the uneven layer composition 1, and the low refractive index layer composition 1 is formed. Instead, an antireflection film according to Sample 10 was produced in the same manner as Sample 1, except that the composition 2 for low refractive index layer was used.
  • the reflection Y value was measured using a spectrophotometer (MPC3100, manufactured by Shimadzu Corporation). Specifically, the light is incident from the surface side of each film (the surface side of the concavo-convex layer or the low refractive index layer in the optical films of Samples 1 to 9 and the surface side of the low refractive index layer in the antireflection film of Sample 10). Reflected light including diffused light reflected by each film was irradiated with light at an angle of 8 degrees using an integrating sphere, and reflectance in the wavelength range of 380 nm to 780 nm was obtained, and BaSO 4 powder was solidified.
  • MPC3100 spectrophotometer
  • the reflection Y value was calculated under the condition of “C light source, field of view of 2 degrees” by software (for example, software built in MPC3100) that was measured using a white plate as a reference and then converted as lightness perceived by human eyes.
  • the measurement of the reflection Y value is performed in a state where a black tape (manufactured by Teraoka Seisakusho) is attached to the surface (back surface) opposite to the surface on which the concavo-convex layer or the hard coat layer is formed in the triacetyl cellulose base material. went.
  • Examples 1 to 8 and Comparative Examples 1 to 4 One or two films were taken out from the films according to Samples 1 to 10, and one was film A (display panel side film) and the other was film B (touch panel side film).
  • the film combinations in each example and comparative example are shown in Table 2. And using the film A and the film B, the following interference fringe evaluation, glare evaluation, and visibility evaluation were performed.
  • the film A was affixed on the black acrylic board through the transparent adhesive.
  • the film B was attached to a glass plate having a thickness of 0.7 mm and a size of 10 cm ⁇ 10 cm via a transparent adhesive (product name “PD-S1”, manufactured by Panac Corporation). Then, the surface of the film A (the surface of the concavo-convex layer or the low refractive index layer in the samples 1 to 9 and the surface of the low refractive index layer in the sample 10) and the surface of the film B (the concavo-convex layer or low in the samples 1 to 9).
  • a tape was attached to both ends of the acrylic plate with film A, and a glass plate with film B was arranged so that the surface of the refractive index layer, the surface of the low refractive index layer in sample 10) faced away from each other.
  • the gap of the air gap between the surface of the film A and the surface of the film B was 0.1 mm.
  • light was irradiated from the sodium lamp arrange
  • the evaluation criteria were as follows. (Double-circle): The interference fringe was not confirmed. ⁇ : Some interference fringes were observed, but there was no problem. X: Interference fringes were clearly confirmed.
  • the contrast ratio was measured by the following method. First, a cold cathode tube light source provided with a diffusion plate was prepared as a backlight unit. Two polarizing plates (Samsung AMN-3244TP) were placed thereon, and further, a film A and a film B with glass were placed through an air gap. The gap of the air gap between the surface of the film A and the surface of the film B was 0.1 mm. And the brightness
  • the value (L 1 ) obtained by dividing the contrast (L 1 ) of the samples 1 to 9 by the contrast (L 2 ) when a light-transmitting substrate (triacetyl cellulose resin film) is used instead of the samples 1 to 9 1 / L 2 ) ⁇ 100 (%) was defined as the contrast ratio.
  • the luminance was measured in a dark room of 5 lx or less.
  • the luminance was measured using a color luminance meter (BM-5A, manufactured by Topcon).
  • the measurement angle of the color luminance meter was set to 1 °, and the measurement was performed with a visual field of 5 mm on the sample.
  • the light amount of the backlight was set such that the luminance when the two polarizing plates were set in parallel Nicol was 3600 cd / m 2 without the sample being set.
  • Comparative Example 1 since the internal haze value of the optical film was less than 1%, glare was confirmed. In Comparative Example 2, it was confirmed that the visibility (contrast ratio) was inferior because the internal haze value exceeded 30%. In contrast, in Examples 1 to 8, since an optical film having an internal haze value of 1% or more and 30% or less was used, no glare was confirmed or slight glare was confirmed, but there was no problem. It was a level.

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Abstract

L'invention concerne un dispositif d'affichage ayant un panneau tactile, au moyen duquel des franges d'interférence qui sont générées lorsqu'un écran d'affichage d'image est pressé fortement peuvent être rendues invisibles et l'éblouissement peut être supprimé. En conséquence d'un mode de réalisation de la présente invention, un dispositif d'affichage (10) ayant un panneau tactile est fourni, qui comprend un panneau d'affichage (20) pour afficher des images et un panneau tactile (40) agencé plus loin sur un côté observateur que le panneau d'affichage (20). Le panneau d'affichage (20) et le panneau tactile (40) sont agencés en ayant un espace (11) entre eux. Un premier matériau de base de transmission de lumière (30) et une couche irrégulière (31) ayant une surface irrégulière et stratifiée sur le premier matériau de base de transmission de lumière (30) sont disposés, dans ledit ordre, sur la surface d'au moins soit une surface (20A) sur le côté panneau tactile (40) du panneau d'affichage (20) soit une surface (40A) sur le côté panneau d'affichage (20) du panneau tactile (40). La surface irrégulière de la couche irrégulière (31) comprend un film optique (29) agencé de façon à être sur le côté espace (11). La valeur de flou interne pour le film optique (29) est de 1% à 30% et l'angle moyen d'inclinaison (θａ) pour la surface du film optique (29) est de 0,074 à 2000°.
PCT/JP2015/067036 2014-06-13 2015-06-12 Dispositif d'affichage ayant un panneau tactile WO2015190600A1 (fr)

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CN112867980A (zh) * 2018-10-12 2021-05-28 住友化学株式会社 光学层叠体及其制造方法

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KR102231025B1 (ko) * 2016-06-06 2021-03-23 다이니폰 인사츠 가부시키가이샤 터치 패널 펜용 필기 시트의 선별 방법, 터치 패널 시스템, 터치 패널 펜용 필기 시트, 터치 패널 및 표시 장치
CN112199979A (zh) * 2019-07-07 2021-01-08 奕力科技股份有限公司 能够侦测一手指的指纹的显示装置与指纹识别芯片

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