CN114761840A - Optical laminate, optical device, and image display device - Google Patents
Optical laminate, optical device, and image display device Download PDFInfo
- Publication number
- CN114761840A CN114761840A CN202080082652.8A CN202080082652A CN114761840A CN 114761840 A CN114761840 A CN 114761840A CN 202080082652 A CN202080082652 A CN 202080082652A CN 114761840 A CN114761840 A CN 114761840A
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- Prior art keywords
- light
- polarizer
- optical
- layer
- optical laminate
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Polarising Elements (AREA)
Abstract
The invention provides a display screen which presents an appearance in accordance with the design of the peripheral part when not displayed and can clearly display an image by an image display device when displayed. The invention provides an optical laminate, which sequentially comprises a light-transmitting colored layer, a light-transmitting reflecting plate and an absorption type polarizer.
Description
Technical Field
The present invention relates to an optical laminate, and an optical device and an image display device provided with the optical laminate.
Background
In recent years, there has been a tendency that higher functionality is advanced in electric appliances and in-vehicle devices, and the mounting area of a display screen such as an operation screen and a monitor screen is increased. Since the display screen usually looks black when not displayed, the display screen may not be compatible with the design of the peripheral portion such as the housing, and the design of the entire display screen may deteriorate.
As a method for improving the design of the entire display screen by making it difficult to recognize the difference between the appearance of the display screen and the design of the peripheral portion, patent documents 1 and 2 propose covering the display screen with a decorative sheet capable of keeping harmony with the peripheral portion. However, in the techniques of patent documents 1 and 2, it is difficult to realize a display screen that presents an appearance that is compatible with the design of the peripheral portion when not displayed and that enables an image to be clearly displayed by the image display device when displayed.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2018-128581
Patent document 2: japanese patent laid-open publication No. 2019-120833
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made to solve the above conventional problems, and a main object of the present invention is to realize a display screen that presents an appearance that is compatible with the design of the peripheral portion when not displayed, and that enables an image to be clearly displayed by an image display device when displayed.
Means for solving the problems
According to one aspect of the present invention, there is provided an optical laminate comprising, in this order, a light-transmissive colored layer, a light-transmissive reflective plate, and an absorption-type polarizer.
In one embodiment, the light transmissive reflector has a single transmittance of 10% to 70%.
In one embodiment, the light-transmissive colored layer is a binder layer containing a colorant.
In one embodiment, the light transmissive reflector includes a reflective polarizer.
In one embodiment, the reflection polarizer is disposed such that a reflection axis direction of the reflection polarizer and an absorption axis direction of the absorption polarizer are substantially parallel to each other.
According to another aspect of the present invention, there is provided an optical apparatus including: the optical layered body, and a light receiving element that utilizes light that has passed through the optical layered body.
In one embodiment, the optical layered body is disposed on a surface of the light receiving element.
In one embodiment, the light receiving element is an image pickup element.
According to still another aspect of the present invention, there is provided an image display device including the optical layered body.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to realize a display screen that presents an appearance that is compatible with the design of the peripheral portion when not displayed, and that enables an image to be clearly displayed by an image display device when displayed.
Drawings
Fig. 1 is a schematic cross-sectional view of an optical stack according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view of an optical stack according to one embodiment of the present disclosure.
Figure 3 is a schematic cross-sectional view of an optical stack according to one embodiment of the present invention.
FIG. 4 is a schematic perspective view of an example of a reflective polarizer usable in the present invention.
Fig. 5 is a schematic cross-sectional view of an image display device according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.
A. Definition of terms
(1) The expression "substantially orthogonal" includes a case where the angle formed by the two directions is 90 ° ± 10 °, preferably 90 ° ± 7 °, and more preferably 90 ° ± 5 °. Further, in the case of simply being referred to as "orthogonal" in the present specification, it is considered that a substantially orthogonal state is included.
(2) The expression "substantially parallel" includes the case where the angle formed by the two directions is 0 ° ± 10 °, preferably 0 ° ± 7 °, and more preferably 0 ° ± 5 °. Further, in the present specification, the term "parallel" is simply used to include a substantially parallel state.
(3) The terms "layer", "plate", "sheet" and "film" are not to be distinguished from each other only by differences in designation. For example, the term "layer" is a concept including what may be referred to as "plates", "sheets", "films", and the like.
B. Optical laminate
B-1. integral constitution of optical laminate
Fig. 1 is a schematic cross-sectional view of an optical stack according to an embodiment of the present invention. The optical laminate 100 includes a light-transmissive colored layer 10, a light-transmissive reflective plate 20, and an absorption-type polarizer 30 in this order. Typically, the optical laminate 100 is applied to an image display device having an optical unit, such as a liquid crystal display device having a liquid crystal cell, an organic Electroluminescence (EL) display device having an EL cell, and the like, and in this case, the light-transmissive colored layer 10 is disposed on the visible side of the optical unit so as to be closer to the visible side than the absorption polarizer 30. By such an arrangement, when the image display device is not displaying, the design of the color transparent layer 10 can be observed favorably by the external light (reflected light) reflected by the light-transmissive reflection plate 20, and when the light incident from the optical unit side and transmitted through the absorption-type polarizer 30 is observed during displaying, the image displayed by the image display device can be clearly seen.
In the illustrated optical laminate 100, protective layers (the first protective layer 82 and the second protective layer 84) are disposed on both sides of the absorption-type polarizer 30, and either one (for example, the first protective layer 82) or both of the protective layers may be omitted depending on the purpose and the configuration.
The respective components constituting the optical laminate 100 are laminated via an arbitrary and appropriate adhesive layer (not shown) such as an adhesive layer and a pressure-sensitive adhesive layer, or are laminated without an adhesive layer, as necessary. If necessary, an adhesive layer or the like for attaching the optical laminate 100 to an adjacent member may be provided on the side of the second protective layer 84 opposite to the side on which the absorption polarizer 30 is disposed. In addition, any arbitrary and appropriate constituent element may be disposed between the light transmissive colored layer and the light transmissive reflector, and/or between the light transmissive reflector and the absorption polarizer, within a range in which the effects of the present invention can be obtained.
The metric chromaticity of the reflected light in the SCI system of the optical layered body 100 may vary depending on the design of the peripheral portion of the display screen, and may be, for example, 20 or more, preferably 30 or more, more preferably 40 or more, and still more preferably 50 or more. The upper limit of the metric chromaticity of the reflected light may be 80, for example. Metric chroma is L *a*b*A in the color system*Value b and b*The value obtained by the following equation represents the distance from the central axis (achromatic axis) of the color space.
Metric chroma (C)*)＝√(a*2+b*2)
The optical layered body has a monomer transmittance of, for example, 1.0% or more, preferably 3.8% or more. The monomer transmittance may be, for example, 50% or less, and further, for example, 45% or less. By having such a transmittance, an image can be clearly displayed by the image display device.
B-2. light-transmitting colored layer
The light-transmitting colored layer is a layer having a monomer transmittance of 15% or more, preferably 40% or more, and more preferably 80% or more, and a colored object color. The upper limit of the monomer transmittance of the light-transmissive colored layer may be, for example, 95%, and further, for example, 93%. Further, the object color of the colored light-transmitting colored layer may be a color (transmission color) produced by transmitting light and/or a color (surface color) produced by reflection, and is preferably a transmission color. In one embodiment, when the transmitted metric chromaticity is 20 or more, preferably 40 or more, the transmitted color may be referred to as colored.
The color of the object color of the light-transmissive colored layer can be appropriately selected according to the design of the peripheral portion of the display screen. For example, the light transmissive colored layer may be a single color, or may have a plurality of colors and/or shades to form a pattern.
As the light-transmitting colored layer, for example, a layer obtained by coloring a constituent element of a conventional polarizing plate, which has a polarizer containing iodine and a protective layer provided on at least one side thereof, may be used, and when the polarizing plate is disposed on the visible side of the optical unit, the constituent element is disposed on the visible side of the polarizing plate. Examples of such a component include a protective layer, an adhesive layer, and an adhesive layer. Among them, the protective layer or the adhesive layer is preferably colored, and more preferably, a colored adhesive layer is used. The coloring can be performed by mixing a colorant into the material for forming the above-described constituent element (for example, the protective layer or the adhesive layer). The kind of the colorant and the amount of the colorant to be blended are appropriately selected in accordance with the design of the peripheral portion of the display screen. Further, the coloring of the protective layer may be performed by providing a colored coating layer on the surface of the protective layer.
In one embodiment, the light transmissive colored layer selectively absorbs light in a specific wavelength range between wavelengths of 380nm to 780nm (i.e., has an absorption maximum wavelength in a wavelength band of the specific range). The light-transmissive colored layer may have 2 or more absorption maximum wavelengths. The light-transmissive colored layer having 2 or more absorption maximum wavelengths can be obtained by using, for example, a plurality of colorants.
The transmittance of the light-transmissive colored layer at the absorption maximum wavelength is preferably 15% to 80%, more preferably 15% to 70%. The effects of the present invention can be suitably exhibited if the transmittance of the absorption layer at the absorption maximum wavelength is within such a range.
The haze value of the light-transmissive colored layer is preferably 30% or less, more preferably 15% or less, and further preferably 10% or less. The lower the haze value of the absorption layer, the more preferable the lower limit thereof is, for example, 0.1%. If the haze value of the light-transmissive colored layer is within such a range, the effects of the present invention can be suitably exhibited.
The thickness of the light-transmitting colored layer is preferably 1 μm to 100. mu.m, more preferably 2 μm to 30 μm. If the thickness of the light-transmissive colored layer is within such a range, the effects of the present invention can be suitably exhibited.
Specific examples of the colorant include dyes such as anthraquinone dyes, triphenylmethane dyes, naphthoquinone dyes, thioindigo dyes, perinone dyes, perylene dyes, squarylium salts dyes, cyanine dyes, porphyrin dyes, azaporphyrin dyes, phthalocyanine dyes, subphthalocyanine dyes, quinizarine dyes, polymethine dyes, rhodamine dyes, OXONOL dyes, quinone dyes, azo dyes, xanthene dyes, azomethine dyes, quinacridone dyes, dioxazine dyes, diketopyrrolopyrrole dyes, anthrapyridone dyes, isoindolinone dyes, indigo dyes, thioindigo dyes, quinophthalone dyes, quinoline dyes, and triphenylmethane dyes.
As the colorant, a pigment may be used. Specific examples of the pigment include black pigments (carbon black, bone black, graphite, iron black, titanium black, etc.), azo pigments, phthalocyanine pigments, polycyclic pigments (quinacridone, perylene, perinone, isoindolinone, isoindoline, dioxazine, thioindigo, anthraquinone, quinophthalone, metal complex, diketopyrrolopyrrole, etc.), dye lake pigments, white/extender pigments (titanium oxide, zinc sulfide, clay, talc, barium sulfate, calcium carbonate, etc.), color pigments (chrome yellow, cadmium, chrome vermilion, nickel titanium, chromium titanium, iron oxide yellow, ferric oxide, zinc chromate, red lead, ultramarine blue, prussian blue, cobalt blue, chrome green, chromium oxide, bismuth vanadate, etc.), luster pigments (pearl pigments, aluminum pigments, bronze pigments, etc.), fluorescent pigments (zinc sulfide, zinc oxide, chrome red, blue, chrome green, etc.), luster pigments (pearl pigments, aluminum pigments, etc.), and bronze pigments, Strontium sulfide, strontium aluminate, etc.), etc.
The content ratio of the colorant may be set to an arbitrary and appropriate ratio according to the kind of the colorant, the desired light absorption characteristics, and the like. The content ratio of the colorant in the light-transmissive colored layer is preferably 0.01 to 5.00 wt%, more preferably 0.05 to 3.00 wt%.
Figure 2 is a schematic cross-sectional view of an optical stack in one embodiment of the invention. The optical laminate 100a includes a surface protective layer 40, a colored pressure-sensitive adhesive layer 50 (light-transmitting colored layer 10), a light-transmitting reflective plate 20, and an absorbing polarizer 30 in this order.
Figure 3 is a schematic cross-sectional view of an optical stack in another embodiment of the present disclosure. The optical laminate 100b includes a colored surface protective layer 60 (light-transmitting colored layer 10), an adhesive layer 70, a light-transmitting reflective plate 20, and an absorbing polarizer 30 in this order.
B-3. light-transmitting reflecting plate
The light-transmitting reflective plate has a transmission characteristic and a reflection characteristic that reflect a part of incident light and transmit the remaining light. The single transmittance of the light transmissive/reflective plate is preferably 10% to 70%, more preferably 15% to 65%, and still more preferably 20% to 60%. The reflectance of the light-transmitting reflective plate is preferably 30% or more, more preferably 40% or more, and further preferably 45% or more. As the light transmissive reflector, for example, a half mirror, a reflective polarizer, a louver film (shutter film), or the like can be used.
As the half mirror, for example, a multilayer laminated body in which dielectric films having different refractive indices are laminated can be used. Such a half mirror preferably has a metallic luster.
Examples of the material for forming the dielectric film include metal oxides, metal nitrides, metal fluorides, thermoplastic resins (e.g., polyethylene terephthalate (PET)), and the like. The multilayer dielectric film laminate reflects a part of incident light at an interface due to a difference in refractive index between the dielectric films stacked. The phase of the incident light and the reflected light is changed according to the thickness of the dielectric film, and the degree of interference between the two lights is adjusted, thereby adjusting the reflectance. The thickness of the half mirror formed of the multilayer laminate of dielectric films may be, for example, 50 μm to 200 μm. As such a half mirror, for example, a commercially available mirror such as "PICASUS" manufactured by Toray corporation can be used.
As the half mirror, for example, a metal deposition film In which a metal such as aluminum (Al), indium (In), zinc (Zn), lead (Pb), copper (Cu), silver (Ag), or an alloy thereof is deposited on a resin film such as PET can be used. The metal vapor-deposited film has a metallic luster due to reflection when viewed from the vapor-deposited film side, but can transmit light from the resin film side, and the light transmittance can be controlled by changing the vapor-deposited film thickness. The deposition film thickness is preferably 1nm to 50nm, more preferably 10nm to 30 nm. The thickness of the resin thin film is preferably 1 to 1000. mu.m, more preferably 20 to 100. mu.m.
The reflective polarizer has a function of transmitting polarized light in a specific polarization state (polarization direction) and reflecting light in other polarization states. The reflective polarizer may be a linearly polarized light separated type or a circularly polarized light separated type, and is preferably a linearly polarized light separated type. The linearly polarized-light-separated reflective polarizer is disposed so that the reflection axis direction is substantially parallel to the absorption axis direction of the absorptive polarizer (as a result, the transmission axis direction of the reflective polarizer is substantially parallel to the transmission axis direction of the absorptive polarizer). By such an arrangement, when the image display device is turned ON (ON), the linearly polarized light that has entered from the optical unit side and has passed through the absorption-type polarizer can be directly transmitted, and as a result, an image can be clearly seen by the image display device. Hereinafter, a linearly polarized-light-separated reflective polarizer will be described as an example. As the circularly polarized light separating type reflective polarizer, for example, a laminate of a film obtained by fixing a cholesteric liquid crystal and a λ/4 plate is exemplified.
Fig. 4 is a schematic perspective view of an example of a reflective polarizer. The reflective polarizing element of the illustrated example is a multilayer thin film type reflective polarizing element, and is a multilayer laminate in which a layer a having birefringence and a layer B having substantially no birefringence are alternately laminated. For example, the total number of layers of such a multilayer laminate may be 50 to 1000. In the illustrated example, the refractive index nx in the x-axis direction of the a layer is larger than the refractive index ny in the y-axis direction, and the refractive index nx in the x-axis direction of the B layer is substantially the same as the refractive index ny in the y-axis direction. Therefore, the refractive index difference between the a layer and the B layer is large in the x-axis direction and substantially zero in the y-axis direction. As a result, the x-axis direction becomes the reflection axis, and the y-axis direction becomes the transmission axis. The difference in refractive index between the A layer and the B layer in the x-axis direction is preferably 0.2 to 0.3. The x-axis direction corresponds to a stretching direction of a reflective polarizer in a manufacturing method described later.
The layer a is preferably made of a material exhibiting birefringence by stretching. Typical examples of such a material include a naphthalenedicarboxylic acid polyester (e.g., polyethylene naphthalate), polycarbonate, and an acrylic resin (e.g., polymethyl methacrylate). Polyethylene naphthalate is preferred. The B layer is preferably made of a material that exhibits substantially no birefringence even when stretched. As a representative example of such a material, a copolyester of naphthalenedicarboxylic acid and terephthalic acid can be given.
The reflective polarizer transmits light having a first polarization direction (e.g., p-wave) at the interface between the a layer and the B layer, and reflects light having a second polarization direction (e.g., s-wave) orthogonal to the first polarization direction. As for the reflected light, at the interface of the a layer and the B layer, a part is transmitted as light having a first polarization direction, and a part is reflected as light having a second polarization direction. In the reflective polarizer, the light utilization efficiency can be improved by repeating such reflection and transmission a plurality of times.
In one embodiment, as shown in fig. 4, the reflective polarizer may include a reflective layer R as an outermost layer on the side opposite to the viewing side. By providing the reflective layer R, light that is not finally used and returns to the outermost portion of the reflective polarizer can be further utilized, and therefore, the light utilization efficiency can be further improved. Typically, the reflective layer R exhibits a reflective function by using a multilayer structure of polyester resin layers.
The overall thickness of the reflective polarizer may be appropriately set according to the purpose, the total number of layers included in the reflective polarizer, and the like. The total thickness of the reflective polarizer is preferably 10 to 150 μm.
Typically, the above-mentioned reflective polarizer can be produced by combining coextrusion and transverse stretching. The coextrusion can be carried out in any and suitable manner. For example, the feed block system may be employed, or the multi-manifold system may be employed. For example, the material constituting the a layer and the material constituting the B layer are extruded in a feedblock, and then multilayered using a multiplier. Such a multilayer device is well known to those skilled in the art. Next, the resulting long multilayer laminate is typically stretched in a direction (TD) orthogonal to the conveyance direction. The refractive index of the material constituting the a layer (for example, polyethylene naphthalate) is increased only in the stretching direction by the transverse stretching, and as a result, birefringence is exhibited. The refractive index of the material constituting the B layer (for example, copolyester of naphthalene dicarboxylic acid and terephthalic acid) does not increase in any direction even by this transverse stretching. As a result, a reflective polarizer having a reflection axis in the stretching direction (TD) and a transmission axis in the conveyance direction (MD) can be obtained (TD corresponds to the x-axis direction and MD corresponds to the y-axis direction in fig. 4). It should be noted that the stretching operation may be performed using any and suitable apparatus.
As the reflective polarizer, for example, a polarizer described in JP-A-9-507308 can be used. As the reflective polarizer, a commercially available product can be used as it is, and a commercially available product can be subjected to secondary processing (for example, stretching). Examples of the commercially available product include a product name "APCF" manufactured by ritonan corporation, a product name "DBEF" manufactured by 3M, and a product name "APF" manufactured by 3M.
As the reflective polarizing material of another embodiment, a thin metal wire type reflective polarizing material such as a wire grid polarizing material can be cited. The wire grid polarizer includes a plurality of wires arranged in a stripe shape, more specifically, a plurality of wires arranged in parallel with a predetermined interval therebetween, and is capable of transmitting a linearly polarized component vibrating in a direction orthogonal to a longitudinal direction (extending direction) of the wires and reflecting the linearly polarized component vibrating in the longitudinal direction of the wires. The wire grid polarizer is arranged such that the reflection axis direction is substantially parallel to the absorption axis direction of the absorption polarizer.
The wire is preferably made of metal. The diameter of the wire and the interval between the wires may be appropriately set according to the purpose. In the embodiment of the present invention, the interval between the lines is set to, for example, 10nm to 350nm, preferably 50nm to 300 nm. By setting the interval between the lines to the above range, a polarization separation function can be suitably obtained in a wavelength range of 350nm to 2000 nm.
B-4. absorption type polarizer
Typically, an absorption-type polarizer (hereinafter, sometimes simply referred to as "polarizer") is formed of a resin film containing iodine. As the resin film, any appropriate resin film that can be used as a polarizer can be used. Typically, the resin film is a polyvinyl alcohol resin (hereinafter referred to as "PVA resin") film. The resin film may be a single-layer resin film or a laminate of two or more layers.
As a specific example of the polarizer made of a single-layer resin film, there is a polarizer obtained by subjecting a PVA-based resin film to dyeing treatment with iodine and stretching treatment (typically, uniaxial stretching). The iodine-based dyeing is performed by, for example, immersing a PVA-based film in an aqueous iodine solution. The stretching ratio of the uniaxial stretching is preferably 3 to 7 times. The stretching may be performed after the dyeing treatment, or may be performed while dyeing. Further, dyeing may be performed after stretching. The PVA-based resin film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment, and the like as necessary. For example, by immersing the PVA-based resin film in water and washing it with water before dyeing, not only dirt and an antiblocking agent on the surface of the PVA-based film can be washed but also the PVA-based resin film can be swollen to prevent uneven dyeing and the like.
Specific examples of the polarizer obtained using the laminate include a laminate of a resin substrate and a PVA-based resin layer (PVA-based resin film) laminated on the resin substrate, and a polarizer obtained using a laminate of a resin substrate and a PVA-based resin layer formed on the resin substrate by coating. A polarizer obtained by using a laminate of a resin substrate and a PVA-based resin layer formed on the resin substrate can be produced by: for example, a laminate of a resin substrate and a PVA-based resin layer is obtained by applying a PVA-based resin solution to a resin substrate and drying the solution to form a PVA-based resin layer on the resin substrate; the laminate was stretched and dyed to prepare a polarizing element from the PVA-based resin layer. In the present embodiment, typically, the stretching includes immersing the laminate in an aqueous boric acid solution and stretching. Further, the stretching may further include, as necessary: before stretching in the aqueous boric acid solution, the laminate is subjected to in-air stretching at a high temperature (for example, 95 ℃ or higher). The obtained resin base material/polarizer laminate may be used as it is (that is, the resin base material may be used as a protective layer for the polarizer), or the resin base material may be peeled off from the resin base material/polarizer laminate and an arbitrary and appropriate protective layer suitable for the purpose may be laminated on the peeled surface. The details of the method for producing such a polarizer are described in, for example, japanese patent laid-open publication No. 2012 and 73580 and japanese patent No. 6470455. The entire disclosures of these publications are incorporated herein by reference.
The thickness of the polarizer is preferably 40 μm or less, and more preferably 30 μm or less. The lower limit of the thickness may be, for example, 2 μm, and further, for example, 3 μm.
The polarizing element preferably exhibits absorption dichroism at any wavelength of 380nm to 780 nm. The monomer transmittance of the polarizer is preferably 43.0% to 46.0%, more preferably 44.5% to 46.0%. The degree of polarization of the polarizer is preferably 97.0% or more, more preferably 99.0% or more, and still more preferably 99.9% or more.
B-5 protective layer
The protective layer is formed of an arbitrary and appropriate thin film that can be used as a protective layer of the polarizer. The protective layer is preferably colorless and transparent, and has a transmittance of 85% or more, preferably 93% or more, over the entire measurement wavelength range of 420nm to 780nm, for example.
Specific examples of the material to be the main component of the film forming the protective layer include cellulose resins such as Triacetylcellulose (TAC); transparent resins such as polyester, polyvinyl alcohol, polycarbonate, polyamide, polyimide, polyether sulfone, polysulfone, polystyrene, polynorbornene, polyolefin, (meth) acrylic, and acetate resins. Further, there may be mentioned thermosetting resins such as (meth) acrylic, urethane, (meth) acrylic urethane, epoxy, silicone and the like, ultraviolet-curable resins and the like. In addition, for example, a glassy polymer such as a siloxane polymer can be cited. Further, the polymer film described in Japanese patent application laid-open No. 2001-343529 (WO01/37007) may be used. As a material of the film, for example, a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in a side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and a nitrile group in a side chain can be used, and for example, a resin composition containing an alternating copolymer of isobutylene and N-methylmaleimide and an acrylonitrile-styrene copolymer can be mentioned. The polymer film may be, for example, an extrusion molded product of the above resin composition.
In one embodiment, as the (meth) acrylic resin, a (meth) acrylic resin having a cyclic structure such as a lactone ring or a glutarimide ring in its main chain can be used. (meth) acrylic resins having a glutarimide ring (hereinafter also referred to as glutarimide resins) are described in, for example, Japanese patent application laid-open Nos. 2006-plus 309033, 2006-plus 317560, 2006-plus 328329, 2006-plus 328334, 2006-plus 337491, 2006-plus 337492, 2006-plus 337493, 2006-plus 337569, 2007-plus 009182, 2009-plus 161744 and 2010-plus 284840. These descriptions are incorporated herein by reference.
When the optical laminate is applied to an image display device, the thickness of the outer protective layers (protective layers 40 and 82) disposed on the viewing side of the absorbing polarizer is typically 300 μm or less, preferably 100 μm or less, more preferably 5 μm to 80 μm, and still more preferably 10 μm to 60 μm. When the surface treatment is performed, the thickness of the outer protective layer is a thickness including the thickness of the surface treatment layer.
When the optical laminate is applied to an image display device, the thickness of the inner protective layer (protective layer 84) disposed closer to the optical unit than the absorption polarizer is preferably 5 μm to 200 μm, more preferably 10 μm to 100 μm, and still more preferably 10 μm to 60 μm. In one embodiment, the inner protective layer is a retardation layer having an arbitrary and appropriate phase difference value. In this case, the in-plane retardation Re (550) of the retardation layer is, for example, 110nm to 150 nm. "Re (550)" is an in-plane retardation measured at 23 ℃ with light having a wavelength of 550nm, and is obtained by the formula Re ═ nx-ny × d. Here, "nx" is a refractive index in a direction in which the in-plane refractive index reaches a maximum (i.e., the slow axis direction), "ny" is a refractive index in a direction orthogonal to the slow axis in the plane (i.e., the fast axis direction), "nz" is a refractive index in the thickness direction, and "d" is a thickness (nm) of the layer (film).
B-6. adhesive layer
Typically, the adhesive layer is an adhesive layer or an adhesive layer. The adhesive layer is preferably colorless and transparent, and has a transmittance of 80% or more, preferably 90% or more, over the entire measurement wavelength range of 420nm to 780nm, for example.
As the adhesive composition constituting the adhesive layer, any and appropriate adhesive composition can be used. Examples thereof include aqueous adhesive compositions such as isocyanate-based, polyvinyl alcohol-based, gelatin-based, vinyl-based latex-based, aqueous polyurethane, and aqueous polyester; and curable adhesive compositions such as ultraviolet curable adhesives and electron beam curable adhesives. The thickness of the adhesive layer may be, for example, 0.05 μm to 1.5. mu.m.
As the adhesive composition for forming the adhesive layer, any and suitable adhesive composition can be used. Examples thereof include adhesive compositions such as rubber-based, acrylic-based, silicone-based, urethane-based, vinyl alkyl ether-based, polyvinyl alcohol-based, polyvinyl pyrrolidone-based, polyacrylamide-based, and cellulose-based adhesive compositions. Among them, acrylic pressure-sensitive adhesive compositions are preferably used from the viewpoint of excellent optical transparency and excellent pressure-sensitive adhesive characteristics, weather resistance, heat resistance and the like. The thickness of the pressure-sensitive adhesive layer may be, for example, 1 μm to 100. mu.m.
C. Image display device
The optical laminate according to item B above can be applied to an image display device. Accordingly, the present invention includes an image display device including the optical laminate. Typical examples of image display devices include liquid crystal display devices including liquid crystal cells, organic Electroluminescence (EL) display devices including organic EL cells, and the like. In one embodiment, the optical laminate is disposed on the visible side of an optical unit such as a liquid crystal cell or an organic EL cell so that the light-transmissive colored layer is closer to the visible side than the absorption polarizer. The liquid crystal cell and the organic EL cell are not a characteristic part of the present invention, and can adopt a configuration known in the art, and therefore, detailed description thereof is omitted.
Fig. 5 is a schematic cross-sectional view of a liquid crystal display device according to an embodiment of the present invention. The liquid crystal display device 200 includes a liquid crystal panel 160 and a backlight unit 180 in this order from the viewing side, and the liquid crystal panel 160 includes an optical laminate 100, a liquid crystal cell 120, and a rear-side polarizer 140. The optical laminate 100 is the optical laminate described in item B, and is disposed such that the light-transmissive colored layer 10 is closer to the visible side than the absorption-type polarizer 30, and such that the absorption axis of the absorption-type polarizer 30 and the absorption axis of the back-side polarizer 140 are substantially orthogonal to each other. As the rear-side polarizer, the same polarizer as the absorption polarizer can be used.
D. Optical device
The optical laminate according to item B above can be applied to an optical device. Therefore, according to another aspect of the present invention, there is provided an optical device including the optical laminate and a light receiving element that utilizes light transmitted through the optical laminate. Typical examples of the optical device include an image pickup device (image sensor), an illuminance sensor, a color sensor, an infrared sensor, LiDAR, and a visible light communication device.
Typically, the light receiving element is a photoelectric effect type element that detects light and converts the light into an electric signal, and is appropriately selected according to the purpose. Specific examples thereof include an image pickup device such as a CCD or a CMOS; phototransistors, photoresistors, etc.
In one embodiment, the optical layered body is disposed on a surface of the light receiving element (more specifically, on a light incident side of the light receiving element) so that the absorption-type polarizer is on the light receiving element side. With this configuration, the light incident portion of light incident on the light receiving element and the design of the peripheral portion thereof can be harmonized, thereby improving the appearance. In addition, another member may be disposed between the optical layered body and the light receiving element within a range in which the effects of the present invention can be obtained.
The imaging apparatus may be, for example, an infrared (near infrared) imaging apparatus including an infrared (near infrared) imaging element. If the infrared (near infrared) imaging apparatus is such, there are advantages as follows: the light-transmitting colored layer exhibits a preferable appearance due to the design of the appearance derived from the light-transmitting colored layer, and the resulting image (including an image) does not produce coloration derived from the light-transmitting colored layer.
Examples
The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The measurement method of each characteristic is as follows. Unless otherwise specifically described, "part" and "%" in examples and comparative examples are based on weight.
(1) Thickness of
The measurement was carried out using a digital meter (product name "PEACOCK" manufactured by Kawasaki corporation).
(2) Reflected hue and metric chroma
The metric chromaticity of the optical laminate was obtained from the reflected hues a and b measured by a spectrophotometer (CM-2600 d, manufactured by KONICAMINOLTA corporation) by using the following formula.
Metric chroma (C)*)＝√(a*2+b*2)
(3) Monomer transmittance and degree of polarization of absorption type polarizer
An acrylic pressure-sensitive adhesive having a thickness of 20 μm was laminated on the polarizing plate a (absorbing polarizer/protective layer) obtained in production example 1 for the absorbing polarizer using an ultraviolet-visible near-infrared spectrophotometer (V-7100, manufactured by japan spectrographs), and the obtained single transmittance Ts, parallel transmittance Tp, and orthogonal transmittance Tc were used as the polarizing plate Ts, Tp, and Tc, respectively. These Ts, Tp and Tc are Y values obtained by measuring with a 2-degree field of view (C light source) according to JIS Z8701 and correcting visibility. The polarization degree was determined from Tp and Tc obtained by using the following formula.
Polarization degree (%) { (Tp-Tc)/(Tp + Tc) }1/2×100
(4) Monomer transmittance of optical laminate and/or light-transmitting colored layer
A transmittance Ts of 380nm to 780nm in a wavelength range measured with an ultraviolet-visible near-infrared spectrophotometer (V-7100, manufactured by JASCO corporation) on the optical laminate and/or the light-transmitting colored layer is set as a monomer transmittance Ts. The Ts is a Y value obtained by measuring and correcting visibility through a 2-degree field of view (C light source) according to JIS Z8701.
(5) Monomer transmittance of light-transmitting reflective plate
The transmittance Ts of the light-transmitting reflection plate was determined as a single transmittance Ts of 380nm to 780nm as measured by an ultraviolet-visible near-infrared spectrophotometer (U-4100 or UH-4150, manufactured by Hitachi Highuchi Co., Ltd.). The Ts is a Y value measured by a 2 degree field of view (C light source) of JIS Z8701 and corrected for visibility.
< production example 1 preparation of polarizing plate >
As the thermoplastic resin base material, an amorphous ethylene terephthalate isophthalate copolymer film (thickness: 100 μm) having a long shape and a Tg of about 75 ℃ was used, and one surface of the resin base material was subjected to corona treatment.
To 100 parts by weight of a PVA-based resin obtained by mixing polyvinyl alcohol (polymerization degree: 4200 and saponification degree: 99.2 mol%) and acetoacetyl-modified PVA (product name "GOHSEFIMER" manufactured by japan synthetic chemical industries) at a ratio of 9:1, 13 parts by weight of potassium iodide was added, and the resultant was dissolved in water to prepare a PVA aqueous solution (coating solution).
The PVA aqueous solution was applied to the corona-treated surface of the resin substrate, and dried at 60 ℃ to form a PVA-based resin layer having a thickness of 13 μm, thereby producing a laminate.
The resultant laminate was uniaxially stretched in the longitudinal direction (longitudinal direction) in an oven at 130 ℃ by a factor of 2.4 (in-air assisted stretching treatment).
Next, the laminate was immersed in an insolubilization bath (aqueous boric acid solution prepared by adding 4 parts by weight of boric acid to 100 parts by weight of water) having a liquid temperature of 40 ℃ for 30 seconds (insolubilization treatment).
Next, in a dyeing bath (aqueous iodine solution obtained by mixing iodine and potassium iodide in a weight ratio of 1:7 with respect to 100 parts by weight of water) having a liquid temperature of 30 ℃, the resultant polarizer was immersed for 60 seconds while adjusting the concentration so that the monomer transmittance (Ts) of the polarizer finally obtained became a desired value (dyeing treatment).
Next, the substrate was immersed for 30 seconds in a crosslinking bath (aqueous boric acid solution prepared by adding 3 parts by weight of potassium iodide to 100 parts by weight of water and 5 parts by weight of boric acid) at a liquid temperature of 40 ℃ (crosslinking treatment).
Thereafter, the laminate was uniaxially stretched at a total stretching ratio of 5.5 times in the longitudinal direction (longitudinal direction) between rolls having different peripheral speeds while being immersed in an aqueous boric acid solution (boric acid concentration of 4 wt%, potassium iodide concentration of 5 wt%) having a liquid temperature of 70 ℃.
Thereafter, the laminate was immersed in a cleaning bath (aqueous solution prepared by adding 4 parts by weight of potassium iodide to 100 parts by weight of water) at a liquid temperature of 20 ℃ (cleaning treatment).
Thereafter, while drying in an oven maintained at about 90 ℃, the contact surface was kept at a temperature of about 75 ℃ with a heated roll made of SUS (drying shrinkage treatment).
In this manner, an absorption-type polarizing material having a thickness of about 5 μm was formed on the resin substrate, and a laminate having a configuration of resin substrate/absorption-type polarizing material was obtained.
An acrylic resin film (thickness: 40 μm) having a lactone ring structure as a protective layer was attached to the surface (surface opposite to the resin base material) of the absorption-type polarizer obtained as described above via an ultraviolet-curable adhesive. Then, the resin base material was peeled off to obtain a polarizing plate a having a structure of an absorption polarizer/protective layer. The polarizing plate a (substantially an absorption polarizer) had a single transmittance of 42.4% and a degree of polarization of 99.999%.
PRODUCTION EXAMPLE 2 preparation of Red adhesive sheet
Preparation of adhesive composition
100 parts of a monomer mixture comprising 2-ethylhexyl acrylate (2EHA), NVP, hydroxyethyl acrylate (HEA) in a weight ratio of 78/18/4 and a trade name as a photopolymerization initiator: irgacure651 (manufactured by Ciba specialty Chemicals) 0.035 parts and trade name: irgacure 184 (available from Ciba Seikagaku Co., Ltd.) was charged into a four-necked flask together with 0.035 parts of Irgacure 184, and the mixture was photopolymerized by irradiating ultraviolet rays under a nitrogen atmosphere until the viscosity (BH viscometer, No.5 spindle, 10rpm, measurement temperature 30 ℃) reached about 15 Pa.s, to thereby prepare a monomer syrup containing a partial polymer of the above monomer mixture.
To 100 parts of this monomer syrup were added 17.6 parts of hydroxyethyl acrylate (HEA), 5.9 parts of acrylic oligomer, 0.088 part of 1, 6-hexanediol diacrylate (HDDA), 0.35 part of 3-glycidoxypropyltrimethoxysilane (trade name: KBM-403, manufactured by shin-Etsu chemical industries, Ltd.) as a silane coupling agent, and 0.05 part by mass of AJISPER PB821, manufactured by AJIAOSU Fine science, Ltd., as a dispersant, and 2, 9-dimethylquino [2,3-b ] acridine-7, 14(5H,12H) -dione (manufactured by BLD Pharmatech Ltd.) as a pigment to prepare a red pressure-sensitive adhesive composition.
As the acrylic oligomer, an oligomer synthesized by the following method was used.
Synthesis of acrylic oligomer
100 parts of toluene, 60 parts of dicyclopentanyl methacrylate (DCPMA) (trade name: FA-513M, manufactured by Hitachi chemical Co., Ltd.), 40 parts of Methyl Methacrylate (MMA), and 3.5 parts of α -thioglycerol as a chain transfer agent were put into a four-necked flask. After stirring at 70 ℃ for 1 hour under a nitrogen atmosphere, 0.2 part of AIBN was added as a thermal polymerization initiator, and the mixture was reacted at 70 ℃ for 2 hours and then at 80 ℃ for 2 hours. Thereafter, the reaction solution was charged at a temperature of 130 ℃ and dried to remove toluene, the chain transfer agent and unreacted monomers, thereby obtaining a solid acrylic oligomer. The acrylic oligomer had a Tg of 144 ℃ and a Mw of 4300.
Production of adhesive sheet
The red pressure-sensitive adhesive composition obtained above was applied to a 38 μm thick release film R1 (MRF #38, manufactured by mitsubishi resin corporation) having a release surface on one side of the polyester film, and a 38 μm thick release film R2 (MRE #38, manufactured by mitsubishi resin corporation) having a release surface on one side of the polyester film was covered with the composition to block air, and then irradiated with ultraviolet light to cure the composition, thereby forming a red pressure-sensitive adhesive sheet (red pressure-sensitive adhesive layer) having a thickness of 50 μm and a monomer transmittance of 19.3%.
[ example 1]
A reflective polarizer (product name "APCF" manufactured by ritonan electric company, product name: 47% of monomer transmittance) was laminated on the surface of the absorbing polarizer of the polarizing plate a obtained in production example 1 via an acrylic pressure-sensitive adhesive layer (thickness: 23 μm) to obtain a laminate having a structure of a protective layer/absorbing polarizer/reflective polarizer. In this case, the reflective polarizer and the absorptive polarizer are stacked so that the reflection axis of the reflective polarizer and the absorption axis of the absorptive polarizer are parallel to each other. A cellulose Triacetate (TAC) film (product name "TG 60 UL" manufactured by Fuji photo film Co., Ltd., thickness: 60 μm) as a protective layer was adhered to the surface of the reflective polarizer of the obtained laminate via a red adhesive sheet (thickness: 50 μm, monomer transmittance: 19.3%) to obtain an optical laminate 1.
[ example 2]
An optical laminate 2 was obtained in the same manner as in example 1, except that a blue pressure-sensitive adhesive sheet (thickness: 50 μm, monomer transmittance: 24.2%) was used instead of the red pressure-sensitive adhesive sheet. The Blue adhesive sheet was prepared by dissolving 0.05 part of a Blue Pigment (product name "Pigment Blue 15" manufactured by tokyo chemical industry corporation) in preparation example 2 in place of the red Pigment.
[ example 3]
An optical laminate 3 was obtained in the same manner as in example 1, except that a yellow adhesive sheet (thickness: 50 μm, monomer transmittance: 57.9%) was used instead of the red adhesive sheet. The Yellow adhesive sheet was prepared by dissolving 0.05 part of a Yellow pigment (product name "Dalamar Yellow" manufactured by Oakwood Products, Inc.) in preparation example 2 in place of the red pigment.
[ example 4]
An optical laminate 4 was obtained in the same manner as in example 1, except that a green adhesive sheet (thickness: 50 μm, monomer transmittance: 43.3%) was used instead of the red adhesive sheet. In addition, a green adhesive sheet was prepared by dissolving 0.03 parts of a Blue Pigment (product name "Pigment Blue 15" manufactured by tokyo chemical industry corporation) and 0.03 parts of a Yellow Pigment (product name "Dalamar Yellow" manufactured by Oakwood Products, Inc) in place of the red Pigment in production example 2.
[ example 5]
An optical layered body 5 was obtained in the same manner as in example 1, except that a half mirror was used instead of the reflective polarizer. As the half mirror, a metal vapor-deposited film was used in which an aluminum vapor-deposited film having a thickness of 13nm was formed on the surface of a 50 μm thick PET film. The monomer transmittance of the metal vapor-deposited film was 11%.
[ example 6]
An optical layered body 6 was obtained in the same manner as in example 1, except that a half mirror was used instead of the reflective polarizer. The half mirror was manufactured by Toray corporation under the name "PICASUS" (thickness: 100 μm, single transmittance: 30%).
[ example 7]
An optical layered body 7 was obtained in the same manner as in example 1, except that a half mirror was used instead of the reflective polarizer. The half mirror was manufactured by Toray corporation under the name "PICASUS" (thickness: 100 μm, single transmittance: 50%).
[ example 8]
An optical layered body 8 was obtained in the same manner as in example 1, except that a half mirror was used instead of the reflective polarizer. The half mirror was manufactured by Toray corporation under the name "PICASUS" (thickness: 100 μm, single transmittance: 85%).
[ example 9]
Using a wire grid polarizing film (product name "WGF" made by Asahi Kasei Co., Ltd.)TM", the thickness was 80 μm, and the single body transmittance was 45.7%), instead of the reflective polarizing plate, an optical laminate 9 was obtained in the same manner as in example 1.
Comparative example 1
The polarizing plate a having the polarizer/protective layer structure obtained in production example 1 was used as it was as an optical laminate C1.
Comparative example 2
An optical laminate C2 was obtained in the same manner as in example 1, except that a TAC film was attached to the surface of the polarizer via a red adhesive sheet without using a reflective polarizer.
Comparative example 3
An optical laminate C3 was obtained in the same manner as in example 2, except that a TAC film was attached to the surface of the polarizer via a blue adhesive sheet without using a reflective polarizer.
Comparative example 4
An optical laminate C4 was obtained in the same manner as in example 3, except that a TAC film was attached to the surface of the polarizer via a yellow adhesive sheet without using a reflective polarizer.
Comparative example 5
An optical laminate C5 was obtained in the same manner as in example 4, except that a TAC film was attached to the surface of the polarizer via a green adhesive sheet without using a reflective polarizer.
The configurations and optical properties of the optical laminates obtained in examples and comparative examples are shown in table 1.
[ Table 1]
As is clear from table 1: the optical layered body of the example had a significantly higher chromaticity of reflected light and a predetermined transmittance, compared to the optical layered body of the corresponding comparative example. According to such an optical laminate, when reused as a display screen for an electric product or an in-vehicle environment, the display screen at the time of non-display (at the time of power-off) and the design of the peripheral portion can be coordinated, and an image can be clearly displayed by the image display device at the time of display.
Industrial applicability
The optical laminate and the image display device of the present invention are suitably used as a display unit for electric appliances such as rice cookers, refrigerators, and microwave ovens, and a display unit for car navigation and measuring instruments in a vehicle interior.
Description of the reference numerals
10 light-transmitting colored layer
20 light-transmitting reflection plate
30 absorption type polarizer
100 optical stack.
Claims (9)
1. An optical laminate comprises a light-transmissive colored layer, a light-transmissive reflective plate, and an absorbing polarizer in this order.
2. The optical stack of claim 1, wherein the transflector has a monomer transmission of 10% to 70%.
3. The optical laminate according to claim 1 or 2, wherein the light-transmissive colored layer is an adhesive layer containing a colorant.
4. The optical stack of any of claims 1-3, wherein the light transmissive reflector comprises a reflective polarizer.
5. The optical laminate according to claim 4, wherein the reflection axis direction of the reflection polarizer and the absorption axis direction of the absorption polarizer are arranged substantially in parallel.
6. An optical device is provided with: the optical laminate according to any one of claims 1 to 5, and a light-receiving element for utilizing light transmitted through the optical laminate.
7. The optical apparatus according to claim 6, wherein the optical layered body is disposed on a surface of the light receiving element.
8. The optical apparatus according to claim 6 or 7, wherein the light receiving element is an image pickup element.
9. An image display device comprising the optical laminate according to any one of claims 1 to 5.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-215330 | 2019-11-28 | ||
| JP2019215330 | 2019-11-28 | ||
| JP2020100244A JP2021092753A (en) | 2019-11-28 | 2020-06-09 | Optical laminate, optical device, and image display device |
| JP2020-100244 | 2020-06-09 | ||
| PCT/JP2020/043219 WO2021106742A1 (en) | 2019-11-28 | 2020-11-19 | Optical laminate, optical device, and image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114761840A true CN114761840A (en) | 2022-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080082652.8A Pending CN114761840A (en) | 2019-11-28 | 2020-11-19 | Optical laminate, optical device, and image display device |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20220105633A (en) |
| CN (1) | CN114761840A (en) |
| WO (1) | WO2021106742A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023176360A1 (en) * | 2022-03-14 | 2023-09-21 | 日東電工株式会社 | Lens part, laminate, display body, and manufacturing method and display method for display body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1755406A (en) * | 2004-10-01 | 2006-04-05 | 日东电工株式会社 | Optical film and image viewing display |
| WO2018008497A1 (en) * | 2016-07-06 | 2018-01-11 | シャープ株式会社 | Display device and electronic apparatus |
| JP2018128581A (en) * | 2017-02-09 | 2018-08-16 | 株式会社 オルタステクノロジー | Liquid crystal display device with design sheet |
| JP2018181637A (en) * | 2017-04-14 | 2018-11-15 | ローム株式会社 | Liquid crystal display device and backlight used for the same |
| CN109983375A (en) * | 2016-11-17 | 2019-07-05 | 日东电工株式会社 | Polarizing film, device used for image display protection board and phase-contrast film |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007055189A1 (en) * | 2005-11-08 | 2007-05-18 | Nissha Printing Co., Ltd. | Design panel |
| JP2019120833A (en) | 2018-01-09 | 2019-07-22 | 大日本印刷株式会社 | Decorative sheet, display device with decorative sheet, and display device with panel |
| JP6792662B2 (en) * | 2019-03-29 | 2020-11-25 | リンテック株式会社 | Colored adhesive sheet and display |
| JP6906560B2 (en) * | 2019-04-03 | 2021-07-21 | リンテック株式会社 | Adhesive sheet and display |
| JP6937338B2 (en) * | 2019-05-27 | 2021-09-22 | リンテック株式会社 | Display and adhesive sheet |
-
2020
- 2020-11-19 CN CN202080082652.8A patent/CN114761840A/en active Pending
- 2020-11-19 KR KR1020227014825A patent/KR20220105633A/en unknown
- 2020-11-19 WO PCT/JP2020/043219 patent/WO2021106742A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1755406A (en) * | 2004-10-01 | 2006-04-05 | 日东电工株式会社 | Optical film and image viewing display |
| WO2018008497A1 (en) * | 2016-07-06 | 2018-01-11 | シャープ株式会社 | Display device and electronic apparatus |
| CN109983375A (en) * | 2016-11-17 | 2019-07-05 | 日东电工株式会社 | Polarizing film, device used for image display protection board and phase-contrast film |
| JP2018128581A (en) * | 2017-02-09 | 2018-08-16 | 株式会社 オルタステクノロジー | Liquid crystal display device with design sheet |
| JP2018181637A (en) * | 2017-04-14 | 2018-11-15 | ローム株式会社 | Liquid crystal display device and backlight used for the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220105633A (en) | 2022-07-27 |
| WO2021106742A1 (en) | 2021-06-03 |
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