CN113678184A - Optical member with colored layer, laminate, and image display device - Google Patents
Optical member with colored layer, laminate, and image display device Download PDFInfo
- Publication number
- CN113678184A CN113678184A CN202080027216.0A CN202080027216A CN113678184A CN 113678184 A CN113678184 A CN 113678184A CN 202080027216 A CN202080027216 A CN 202080027216A CN 113678184 A CN113678184 A CN 113678184A
- Authority
- CN
- China
- Prior art keywords
- colored layer
- layer
- optical member
- display region
- multilayer structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- 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
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- 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
Abstract
The invention provides an optical member with a colored layer, which has a colored layer having good shielding property and can be bonded without involving air bubbles between the colored layer and a bonding layer when bonded to the bonding layer, and a laminate and an image display device including the optical member. The present invention provides an optical member with a colored layer, comprising an optical member and a colored layer provided on one surface of the optical member, wherein the optical member with the colored layer is divided into a display region and a non-display region in a plan view, the colored layer is provided in the non-display region, the colored layer has 1 or more step portions so that the thickness of the display region side becomes smaller, and the cross-sectional shapes of the end portion of the colored layer on the display region side and the step portions are both tapered with a taper angle of 15 DEG or less.
Description
Technical Field
The present invention relates to an optical member with a colored layer, a laminate including the optical member, and an image display device.
Background
As various image display devices such as a liquid crystal display device and an organic Electroluminescence (EL) display device, it is known to provide a front panel on a viewing side of a display panel to protect the display panel. Such a front panel may be provided with a non-display region to shield electrodes, wirings, and the like, or to suppress light leakage from light leakage on the display panel side (for example, patent documents 1 and 2). Patent documents 1 and 2 describe that the non-display region is formed as a colored layer.
Documents of the prior art
Patent document
Patent document 1: korean laid-open patent No. 10-2015-0042046
Patent document 2: korean laid-open patent No. 10-2017-0039809
Patent document 3: international publication No. 2014/073316
Disclosure of Invention
In the case where the non-display region is formed as a colored layer, the colored layer having sufficient shielding properties to conceal electrodes, wirings, and the like and to suppress light leakage is formed on the optical member. In order to ensure such a shielding property, a colored layer having a multilayer structure in which a plurality of colored layers are stacked may be formed. However, such a colored layer having a multilayer structure often has a step portion, and when a laminate is produced by bonding another optical member via a bonding layer such as an adhesive layer, there is a case where bonding is performed while involving air bubbles between the colored layer and the bonding layer due to the step of the colored layer, and good visibility cannot be obtained.
The invention provides an optical member with a colored layer, which has a colored layer having good shielding property and can be bonded without involving air bubbles between the colored layer and a bonding layer when bonded to the bonding layer, and a laminate and an image display device including the optical member.
[1] An optical member with a colored layer, comprising an optical member and a colored layer provided on one surface of the optical member,
the optical member with the color layer is divided into a display region and a non-display region in a plan view,
the colored layer is provided in the non-display region,
the colored layer has 1 or more step portions so that the thickness of the colored layer on the display region side becomes smaller,
in the colored layer, cross-sectional shapes of the end portion on the display region side and the level difference portion are both tapered shapes having a taper angle of 15 ° or less.
[2] The optical member with a colored layer according to item [1], wherein the colored layer has a multilayer structure.
[3] The optical member with a color layer according to item [2], wherein each of the layers of the multilayer structure has a tapered shape with a taper angle of 15 ° or less at an end portion on the display region side.
[4] The optical member with color layers according to [2] or [3], wherein positions of the end portions on the display region side are different in each of the layers of the multilayer structure.
[5] The optical member with a colored layer according to any one of [2] to [4], wherein the outermost layer of the multilayer structure has an end portion on the display region side positioned on the side closest to the display region in the multilayer structure.
[6] The optical member with a colored layer according to any one of [2] to [5], wherein the colors of the respective layers of the multilayer structure are the same.
[7] The optical member with a colored layer according to any one of [2] to [6], wherein the colored layer has a multilayer structure in which 2 or more colors are different.
[8] The optical member with a colored layer according to any one of [1] to [7], wherein the colored layer has a maximum thickness of 30 μm or less.
[9] The optical member with a colored layer according to any one of [1] to [8], wherein the optical member is selected from a front panel, a polarizing plate, and a touch sensor panel.
[10] A laminate comprising the optical member with a colored layer according to any one of [1] to [9], and a laminating layer on the colored layer side of the optical member with a colored layer.
[11] An image display device comprising the optical member with a colored layer according to any one of [1] to [9] or the laminate according to [10 ].
According to the present invention, it is possible to provide an optical member with a colored layer, which has a colored layer having a good shielding property and can be bonded to a bonding layer without involving air bubbles between the colored layer and the bonding layer when the optical member is bonded to the bonding layer, and a laminate and an image display device each including the optical member.
Drawings
Fig. 1 is a schematic cross-sectional view schematically showing an example of the optical member with a colored layer of the present invention.
Fig. 2 is a schematic top view of the optical member with a colored layer shown in fig. 1 as viewed from the front panel side.
Fig. 3 is a schematic cross-sectional view schematically showing a taper angle of a colored layer.
Fig. 4 is a schematic cross-sectional view schematically showing an example of the optical member with a colored layer of the present invention.
Fig. 5 is a schematic cross-sectional view schematically showing a taper angle of the colored layer.
Fig. 6 is a schematic cross-sectional view schematically showing an example of the optical member with a colored layer of the present invention.
Fig. 7 is a schematic cross-sectional view schematically showing the structure of the colored layer of example 1.
Fig. 8 is a schematic cross-sectional view schematically showing the structure of the colored layer of comparative example 1.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments below. In all the drawings below, the scale of each component shown in the drawings is appropriately adjusted to show the component for easy understanding, and the scale of each component does not necessarily coincide with the scale of the actual component.
< optical component with color layer >
Fig. 1 is a schematic cross-sectional view schematically showing an example of an optical member with a colored layer according to the present embodiment. Fig. 2 is a schematic top view of the optical member with a colored layer shown in fig. 1, as viewed from the colored layer side in a plan view. The optical member 100 with a colored layer is composed of an optical member 20 and a colored layer 10 provided on the optical member 20. In the present specification, a planar view means a view from the thickness direction of the layer.
As shown in fig. 2, the optical member 100 with the colored layer is divided into a display region and a non-display region, and in this case, as shown in fig. 1, the colored layer 10 is provided in the non-display region B. As described later, when the optical member 100 with the color layers constitutes an image display device, the display region a of the optical member 100 with the color layers is a region where an image is displayed, and the non-display region B is a region where an image is not displayed. Therefore, it is sometimes required to dispose electrodes, wirings, and the like in the non-display region B or to suppress light leakage from a display cell provided in the image display device. In this case, the colored layer 10 provided in the non-display region B preferably has sufficient shielding properties to achieve hiding properties of electrodes, wirings, and the like and to suppress light leakage.
The optical member 100 with the colored layer is preferably bendable. The optical member 100 with the color layer can be bent and can be used for a flexible display. Bendable means that bending can be performed without generating cracks.
The optical member 100 with the color layer may have, for example, a square shape in a plan view, preferably a square shape having a long side and a short side, and more preferably a rectangular shape. When the optical member 100 with the color layer is rectangular in plan view, the length of the long side may be, for example, 10mm to 1400mm, preferably 50mm to 600 mm. The length of the short side is, for example, 5mm to 800mm, preferably 30mm to 500mm, and more preferably 50mm to 300 mm. In each layer constituting the optical member 100 with a colored layer, a corner portion may be rounded, an end portion may be cut, or a hole may be formed.
The thickness of the optical member with a color layer 100 is not particularly limited, and is, for example, 20 to 500 μm, preferably 50 to 300 μm, and more preferably 70 to 200 μm, since it varies depending on the function required for the optical member with a color layer, the use of the optical member with a color layer, and the like.
The optical member 100 with a colored layer can be used for an image display device or the like, for example. The image display device is not particularly limited, and examples thereof include an organic electroluminescence (organic EL) display device, an inorganic electroluminescence (inorganic EL) display device, a liquid crystal display device, and an electroluminescence display device. The optical member 100 with the color layer is suitable for a flexible display when the optical member 100 with the color layer can be bent.
(colored layer)
The colored layer 10 is preferably provided on at least a part of the peripheral edge portion of the optical member 100 with a colored layer in a plan view, and may be provided on the entire peripheral edge portion of the optical member 100 with a colored layer so as to form the non-display region B122, as shown in fig. 2. By providing the colored layer 10 so as to cover the peripheral edge portion of the optical member 100 with the colored layer, the colored layer 10 is visually recognized as a frame, and hence design can be improved. As described later, the colored layer 10 may have a multilayer structure.
The colored layer 10 has a level difference portion 10c so that the thickness of the display region a side becomes smaller. The colored layer 10 may have 2 or more, for example, 3 or more or 4 or more step portions. The colored layer 10 shown in fig. 1 has 1 level difference portion 10 c. The level difference portion 10c may be formed in a case where the 2 nd coloring layer is formed on the 1 st coloring layer to be described later so that the end portion of the 2 nd coloring layer on the display region side is located closer to the display region side than the end portion of the 1 st coloring layer on the display region side. The height of the step is preferably 10 μm or less, more preferably 7 μm or less, further preferably 5 μm or less, and further preferably 3 μm or less.
In the colored layer 10, both the end portion on the display region side and the stepped portion have a tapered shape with a taper angle of 15 ° or less. As shown in fig. 1, the colored layer 10 has a tapered shape with a taper angle of 15 ° or less in the cross-sectional shape of the end portion on the display region a side and the cross-sectional shape of the stepped portion 10 c. By forming the tapered shape, when the surface of the colored layer 10 side of the optical member 100 with a colored layer is bonded to a bonding surface of a bonding layer to be described later, there is a tendency that air bubbles are not involved between the colored layer 10 and the bonding layer at a stepped portion of the colored layer 10 and bonding becomes easy.
The taper angle of the cross-sectional shape of the end portion on the display region a side is smaller in the angle formed by the optical member 20 and the tapered portion of the colored layer 10. As shown in fig. 3, the colored layer 10 has a tapered portion 10a, and the taper angle 10b of the colored layer 10 is an angle formed by the tapered portion 10a and the optical member 20. The taper angle is preferably 10 ° or less, and more preferably 5 ° or less, from the viewpoint of suppressing the generation of bubbles. The taper angle 10b of the cross-sectional shape of the end portion of the colored layer 10 on the display area a side can be adjusted by the kind or content of a colorant (e.g., a pigment) or an additive contained in the colored layer 10, the method of forming the colored layer 10, and the like.
The taper angle of the cross-sectional shape of the stepped portion 10c is smaller in the angle formed by the optical member 20 and the tapered portion of the colored layer 10. As shown in fig. 3, the colored layer 10 has a tapered portion 10d in the level difference portion 10c, and the taper angle 10e of the colored layer 10 is an angle formed by the tapered portion 10d and the optical member 20. The taper angle of the step portion is preferably 10 ° or less, more preferably 5 ° or less, from the viewpoint of suppressing bubbles. The taper angle of the level difference portion can be adjusted by adjusting the taper angle of the end portion of the colored layer on the lower layer side (closer to the optical member 20) in the case where the colored layer has a multilayer structure, a method of forming the colored layer, the type or content of a colorant (for example, a pigment) or an additive contained in the colored layer, or the like. For example, in the case where the colored layer has a multilayer structure as described later, if the taper angle of the end portion of the colored layer closer to the optical member on the display region side is smaller, the taper angle of the stepped portion tends to be smaller.
In the optical member with the colored layer, the colored layer may have a multilayer structure. In the optical member 200 with a colored layer shown in fig. 4, the colored layer 10 has a multilayer structure. When the colored layer 10 has a multilayer structure, the optical density of the colored layer 10 tends to be increased, and the number and size of pinholes in the colored layer 10 tend to be reduced. As shown in fig. 4, the colored layer 10 may have a 2-layer structure including a 1 st colored layer 11 and a 2 nd colored layer 12. Each layer of the multilayer structure can be distinguished by the type or content of the colorant, hue, hardness, cross-sectional observation with an electron microscope or the like, and the like.
In each layer of the multilayered structure of the colored layer 10, the cross-sectional shape of the end portion on the display region side may be a tapered shape, and the taper angle thereof may be 15 ° or less. In the optical member 200 with a colored layer, the cross-sectional shapes in the thickness direction of the end portions of the 1 st colored layer 11 and the 2 nd colored layer 12 on the display area a side may be tapered, and the taper angle of the tapered shape may be 15 ° or less. Since the angles of the taper shapes of the respective layers of the multilayer structure are 15 ° or less, when the surface of the colored layer 10 side of the optical member 200 with a colored layer is bonded to a bonding surface of a bonding layer to be described later, air bubbles tend to be less likely to be trapped between the colored layer 10 and the bonding layer in the stepped portion 10 c. In each layer of the multilayer structure of the colored layer 10, the taper angle of the end portion on the display region side is preferably 10 ° or less, and more preferably 5 ° or less, from the viewpoint of suppressing bubbles.
When the colored layer 10 has a multilayer structure, it is preferable that the positions of the end portions on the display region side of the respective layers of the multilayer structure are different from each other in view of reducing the taper angle of the end portions on the display region side of the colored layer 10 and the taper angle of the stepped portion. As shown in fig. 5, the end portion 10g of the 1 st colored layer 11 and the end portion 10f of the 2 nd colored layer 12 may be in different positions, respectively.
The colored layer 10 has a multilayer structure, and from the viewpoint of suppressing bubbles, the end portion of the outermost layer of the multilayer structure on the display region side is preferably positioned closest to the display region side in the multilayer structure. When the end portion of the outermost layer of the multilayer structure on the display region side is positioned closest to the display region side in the multilayer structure, the outermost layer may cover all or part of the other layers in the multilayer structure. As shown in fig. 5, an end portion 10f of the 2 nd colored layer 12 which is the outermost layer may be positioned closer to the display region side than an end portion 10g of the 1 st colored layer 11. In this manner, the level difference portion 10c can be formed by laminating the 2 nd colored layer 12 on the 1 st colored layer 11. When the taper angle of the end portion on the display region side of the 1 st colored layer 11 is 15 ° or less, the taper angle 10e of the tapered portion 10d of the stepped portion 10c tends to be 15 ° or less. The present inventors have found that when the outermost layer is covered with another layer, the fine gaps formed between the layers are eliminated, and the inclusion of air bubbles is easily suppressed. When the multilayer structure is a 3-layer structure or more, the outermost layer covers a minute gap that can be generated between the other 2 layers, and inclusion of air bubbles can be suppressed, and therefore, the above-described structural arrangement is particularly advantageous. In the multilayer structure, when the end portion on the display region side of the outermost layer is positioned closest to the display region side in the multilayer structure, the end portion on the display region side of the other layer than the outermost layer may be positioned closer to the display region side than the layer on the outer side (the layer positioned at a position distant from the surface of the optical member in the stacking direction), or may not be positioned closer.
The colored layer 10 may contain a colorant, which may be a pigment or a dye, and the colored layer 10 may contain 1 or 2 or more kinds of colorants. When the colored layer 10 has a multilayer structure, the colors of the respective layers of the multilayer structure may be the same or different. The colored layer 10 may have a multilayer structure of 2 or more different colors. The difference in color means that the coloring layers contain different coloring agents in at least one of type and amount. The same color means that the coloring layers contain the same kind and amount of coloring agent.
Examples of the colorant include carbon black such as acetylene black, inorganic pigments such as iron black, titanium dioxide, zinc white, red iron oxide, chrome vermilion, ultramarine, cobalt blue, chrome yellow, and titanium yellow; organic pigments or dyes such as phthalocyanine blue, indanthrene blue, isoindolinone yellow, benzidine yellow, quinacridone red, polyazo red, perylene red, aniline black, and the like; metallic pigments made of scaly foils of aluminum, brass, and the like; and pearl luster pigments (pearl pigments) comprising a flake foil such as titanium dioxide-coated mica or basic lead carbonate.
The optical density of the optical member with the colored layer may be, for example, 5 or more. As the optical density of the optical member with the colored layer is higher, the shielding property of the colored layer 10 is higher, and therefore, the concealing property of the electrode and the wiring is easily improved, and light leakage from the display unit is easily suppressed. The optical density of the optical member with the colored layer can be adjusted by the kind or content of the coloring agent contained in the colored layer 10, the thickness of the colored layer 10, the number of layers constituting the colored layer 10, and the like. The optical density of the optical member with the colored layer means the optical density of the thickest region of the colored layer 10.
The color of the colored layer 10 is not particularly limited, and may be appropriately selected depending on the application, design, and the like. Examples of the color of the colored layer 10 include black, white, red, navy blue, silver, and gold.
The thickness of the colored layer 10 may be, for example, 30 μm or less, and preferably 25 μm or less. When the thickness of the colored layer 10 is within the above range, inclusion of air bubbles at the time of bonding to the adhesive layer can be suppressed. The thickness of the colored layer 10 is usually 3 μm or more, and for example, may be 6 μm or more. When the thickness of the colored layer 10 is 3 μm or more, the light shielding property is improved, and the colored layer 10 is easily visually recognized, contributing to improvement of design. The thickness of the colored layer 10 is the maximum thickness of the colored layer 10.
The thicknesses of the 1 st colored layer 11 and the 2 nd colored layer 12 are each preferably 10 μm or less, more preferably 7 μm or less, further preferably 5 μm or less, and further preferably 3 μm or less.
The width of the colored layer 10 (the length of the optical member with a colored layer in the surface direction) is not particularly limited, and may be appropriately selected depending on the size, application, design, and the like of the optical member with a colored layer. As shown in fig. 2, when the colored layer 10 is formed on the peripheral edge portion of the colored-layer-attached optical member, the width of the colored layer 10 may be, for example, 0.5mm or more, or 3mm or more, or 5mm or more, or usually 80mm or less, or 60mm or less, or 50mm or less, or 30mm or less, or 20mm or less. When the colored layer 10 has a multilayer structure, the width of the colored layer 10 is preferably the width of the outermost layer. When the colored layer 10 has a multilayer structure, the layers of the multilayer structure may be overlapped with each other in the width direction by, for example, 0.1mm to 50mm, preferably 0.15mm to 30mm, or 0.25mm to 20 mm.
The colored layer 10 can be formed by a printing method using ink or paint, a vapor deposition method using powder of a metal pigment, a method of forming and transferring the colored layer 10 containing a metal pigment in advance, a photolithography method, or the like. Further, these methods may be combined. The colored layer 10 is preferably formed on the surface of the optical member 20 by a printing method. Examples of the printing method include screen printing, gravure printing, offset printing, transfer printing from a transfer sheet, and inkjet printing. The colored layer 10 having a desired thickness may be formed by repeating printing by a printing method. When the colored layer 10 has a multilayer structure, each layer may be formed by repeating any one of the above-described forming methods, or each layer may be formed by combining the above-described forming methods.
The ink or paint for forming the colored layer 10 may contain a binder, a colorant, a solvent, an arbitrary additive, and the like. Examples of the binder include chlorinated polyolefins (e.g., chlorinated polyethylene and chlorinated polypropylene), polyester resins, urethane resins, acrylic resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymers, and cellulose resins. The binder resin may be used alone, or 2 or more kinds may be used in combination. The binder resin may be a thermally polymerizable resin or a photopolymerizable resin. When the colored layer 10 is formed by a printing method, it is preferable to use an ink or a paint containing 50 to 200 parts by mass of a colorant per 100 parts by mass of a binder resin.
The above description has been mainly made on the case where the coloring layer 10 has a 2-layer structure, but the coloring layer may have a multilayer structure of 3 or more layers. For example, when the colored layer 10 shown in fig. 4 further includes a 3 rd colored layer, the 3 rd colored layer may be provided between the 1 st colored layer 11 and the 2 nd colored layer 12, may be provided between the 2 nd colored layer 12 and the optical member 20, or may be provided on the 1 st colored layer 11.
(optical Member)
The optical member 20 is not limited in material and thickness as long as it is a plate-like body that can transmit light, and may be a single layer or a plurality of layers. The optical member 20 may be a component used in a general image display device, and may be, for example, a polarizing plate, a protective film on the viewing side of the polarizing plate, a touch sensor panel, a laminate of these, or the like.
As the optical member 20, a plate-like body made of glass (for example, a glass plate, a glass film, or the like) or a plate-like body made of resin (for example, a resin plate, a resin sheet, a resin film, or the like) may be used.
As the glass plate, strengthened glass for display is preferably used. The thickness of the glass plate is, for example, 10 to 1000. mu.m, preferably 50 to 500. mu.m. By using the glass plate, the optical member 20 having excellent mechanical strength and surface hardness can be constituted.
The resin film is not limited as long as it is a resin film that can transmit light. Examples of the film include films formed of polymers such as triacetyl cellulose, acetyl cellulose butyrate, ethylene-vinyl acetate copolymer, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, polyester, polystyrene, polyamide, polyetherimide, poly (meth) acrylic acid, polyimide, polyethersulfone, polysulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyetherketone, polyetheretherketone, polyethersulfone, poly (meth) methyl acrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, and polyamideimide. These polymers may be used alone or in combination of 2 or more. When the optical member 100 with a colored layer is used for a flexible display, a resin film made of a polymer such as polyimide, polyamide, or polyamideimide, which can be configured to have excellent flexibility and high strength and high transparency, is preferably used.
< laminate >
Fig. 6 is a schematic cross-sectional view schematically showing an example of a laminate according to an embodiment of the present invention. The laminate 300 shown in fig. 6 includes the front panel 30, the adhesive layer 40, the polarizing plate 50, and the touch sensor panel 60 in this order from the viewing side. The polarizing plate 50 further includes a colored layer 10. The colored layer 10 is provided on a part of the surface of the polarizing plate 50 on the front panel 30 side. The colored layer 10 includes a 1 st colored layer 11, a 2 nd colored layer 12, a 3 rd colored layer 13, a 4 th colored layer 14, and a 5 th colored layer 15.
The colored layer 10 may be constituted by 2 multilayer structures, the 1 st multilayer structure may be constituted by the 1 st colored layer 11 and the 2 nd colored layer 12, and the 2 nd multilayer structure may be constituted by the 3 rd colored layer 13, the 4 th colored layer 14, and the 5 th colored layer 15. In the 1 st multilayer structure, an end portion of the 2 nd colored layer 12 as an outermost layer may be positioned closer to the display region side than an end portion of the 1 st colored layer 11. In the 2 nd multilayer structure, an end portion of the 5 th colored layer 15 as an outermost layer may be positioned closer to the display region side than an end portion of the 3 rd colored layer 13. From the viewpoint of reducing the taper angle of the step, the end portion of the 1 st colored layer 11 of the 1 st multilayer structure is preferably positioned closer to the display region than the end portion of the 5 th colored layer 15 which is the outermost layer of the 2 nd multilayer structure. In the aspect in which the colored layer 10 is formed on the polarizing plate 50 (i.e., on the viewing side of the polarizing plate 50), if air bubbles are generated between the adhesive layer 40 and the colored layer 10, the air bubbles are easily visually recognized. The effect of the present invention can be easily obtained in the mode in which the colored layer 10 is formed on the polarizing plate 50.
(front panel)
The material and thickness of the front panel 30 are not particularly limited as long as the front panel is a plate-like body that can transmit light, and the front panel may have a single-layer structure or a multi-layer structure, and a plate-like body made of glass (e.g., a glass plate, a glass film, etc.) or a plate-like body made of resin (e.g., a resin plate, a resin sheet, a resin film, etc.) may be exemplified. As specific examples of the glass plate-like body and the resin plate-like body, the above description about the optical member 20 can be applied. The front panel may be a layer constituting the outermost surface of the image display device.
When the front panel 30 is a resin film, the resin film may be a film having a hard coat layer provided on at least one side of the base film to further increase the hardness. The hard coat layer may be formed on one surface of the substrate film or on both surfaces. When the image display device described later is a touch panel type image display device, a resin film having a hard coat layer is preferably used because the surface of the front panel 30 serves as a touch surface. By providing the hard coat layer, a resin film having improved hardness and scratch resistance can be produced. The hard coat layer is a cured layer of, for example, an ultraviolet curable resin. Examples of the ultraviolet curable resin include (meth) acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. The hard coating may also contain additives in order to increase hardness. The additive is not limited, and examples thereof include inorganic fine particles, organic fine particles, and a mixture thereof. The thickness of the resin film is, for example, 30 to 2000. mu.m.
The front panel 30 may have a function of protecting the front surface of the image display device, a function as a touch sensor, a blue light cut-off function, a viewing angle adjustment function, and the like.
(laminating layer)
The laminating layer 40 is a layer interposed between the front panel 30 and the polarizing plate 50 and laminating them, and is an adhesive layer or an adhesive layer. The adhesive layer 40 is preferably an adhesive layer in view of absorbing the level difference generated in the colored layer 10.
The pressure-sensitive adhesive layer may be composed of a pressure-sensitive adhesive composition containing a resin such as a (meth) acrylic, rubber, urethane, ester, silicone, or polyvinyl ether resin as a main component. Among them, preferred is an adhesive composition containing a (meth) acrylic resin as a base polymer, which is excellent in transparency, weather resistance, heat resistance and the like. The adhesive composition may be an active energy ray-curable type or a thermosetting type.
As the (meth) acrylic resin (base polymer) used in the adhesive composition, for example, a polymer or copolymer in which 1 or 2 or more kinds of (meth) acrylic esters such as butyl (meth) acrylate, ethyl (meth) acrylate, isooctyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate are used as monomers is preferably used. The base polymer preferably copolymerizes polar monomers. Examples of the polar monomer include monomers having a carboxyl group, a hydroxyl group, an amide group, an amino group, an epoxy group, and the like, such as (meth) acrylic acid, 2-hydroxypropyl (meth) acrylate, hydroxyethyl (meth) acrylate, (meth) acrylamide, N-dimethylaminoethyl (meth) acrylate, and glycidyl (meth) acrylate.
The adhesive composition may comprise only the above-mentioned base polymer, but usually further contains a crosslinking agent. Examples of the crosslinking agent include metal ions having a valence of 2 or more and a metal carboxylate salt formed between carboxyl groups; an amide bond is formed between the polyamine compound and a carboxyl group; polyepoxy compounds or polyols and form ester bonds with carboxyl groups; polyisocyanate compounds and amide bonds are formed between carboxyl groups. Among them, polyisocyanate compounds are preferable.
The active energy ray-curable pressure-sensitive adhesive composition is a pressure-sensitive adhesive composition having a property of being cured by irradiation with an active energy ray such as an ultraviolet ray or an electron beam, and having a property of having adhesiveness even before irradiation with an active energy ray and being capable of being adhered to an adherend such as a film and being cured by irradiation with an active energy ray, thereby being capable of adjusting the adhesion force. The active energy ray-curable adhesive composition is preferably an ultraviolet-curable adhesive composition. The active energy ray-curable adhesive composition further contains an active energy ray-polymerizable compound in addition to the base polymer and the crosslinking agent. Further, a photopolymerization initiator, a photosensitizer, and the like may be contained as necessary.
The binder composition may contain additives such as fine particles, beads (resin beads, glass beads, and the like), glass fibers, resins other than the base polymer, adhesion-imparting agents, fillers (metal powders, other inorganic powders, and the like), antioxidants, ultraviolet absorbers, dyes, pigments, colorants, antifoaming agents, anticorrosive agents, and photopolymerization initiators for imparting light scattering properties.
The adhesive composition can be formed by applying a diluted solution of the above adhesive composition in an organic solvent to a substrate and drying the applied solution. When an active energy ray-curable pressure-sensitive adhesive composition is used, a cured product having a desired degree of curing can be obtained by irradiating the pressure-sensitive adhesive layer formed with an active energy ray.
From the viewpoint of absorbing the level difference generated in the colored layer 10, the thickness of the adhesive layer 40 is preferably larger than the thickness of the colored layer 10, and is, for example, preferably 4 μm to 100 μm, and more preferably 5 μm to 50 μm. The thickness of the lamination layer 40 is the maximum thickness of the lamination layer 40.
(polarizing plate)
The polarizing plate 50 may be a linear polarizing plate or a circular polarizing plate. Examples of the linear polarizing plate include a stretched film or a stretched layer having a dichroic dye adsorbed thereon, and a film including a polarizer obtained by coating and curing a composition containing a dichroic dye and a polymerizable compound. As the dichroic dye, specifically, iodine or a dichroic organic dye can be used. The dichroic organic dye includes a dichroic direct dye composed of a disazo compound such as c.i. direct red 39, and a dichroic direct dye composed of a compound such as trisazo or tetrazo.
Examples of the film used as a polarizer, which is obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound, include a film containing a cured product of a polymerizable liquid crystal compound, such as a layer obtained by applying and curing a composition containing a dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a polymerizable liquid crystal. A film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound is preferable because the film is not limited in the bending direction as compared with a stretched film or a stretched layer having a dichroic dye adsorbed thereon.
The linear polarizing plate may be composed of only a polarizer, or may further include a protective layer, a thermoplastic resin film, a substrate, an alignment film, and a protective layer in addition to the polarizer. The thickness of the linear polarizer is, for example, 2 μm to 100 μm, preferably 10 μm to 60 μm.
(1) Linear polarizing plate having stretched film or stretched layer as polarizer
A linear polarizing plate including a stretched film having a dichroic dye adsorbed thereon as a polarizer will be described. A stretched film as a polarizer, to which a dichroic dye is adsorbed, can be generally produced through the following steps: a step of uniaxially stretching a polyvinyl alcohol resin film; a step of dyeing a polyvinyl alcohol resin film with a dichroic dye to adsorb the dichroic dye; treating the polyvinyl alcohol resin film having the dichroic dye adsorbed thereon with an aqueous boric acid solution; and a step of washing with water after the treatment with the aqueous boric acid solution. The polarizer may be used as it is as a linear polarizing plate, or a polarizer in which a thermoplastic resin film described later is laminated on one surface or both surfaces of the polarizer may be used as a linear polarizing plate. The thickness of the polarizer is preferably 2 μm to 40 μm.
The polyvinyl alcohol resin can be obtained by saponifying a polyvinyl acetate resin. As the polyvinyl acetate-based resin, in addition to polyvinyl acetate which is a homopolymer of vinyl acetate, a copolymer of vinyl acetate and another monomer copolymerizable therewith may be used. Examples of the other monomer copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and (meth) acrylamides having an ammonium group.
The saponification degree of the polyvinyl alcohol resin is usually 85 to 100 mol%, preferably 98 mol% or more. The polyvinyl alcohol resin may be modified, and for example, polyvinyl formal or polyvinyl acetal modified with aldehydes may be used. The polymerization degree of the polyvinyl alcohol resin is usually 1000 to 10000, preferably 1500 to 5000.
Next, a linear polarizing plate including a stretched layer having a dichroic dye adsorbed thereon as a polarizer will be described. The stretched layer having a dichroic dye adsorbed thereon as a polarizer can be generally produced through the following steps: a step of applying a coating liquid containing the polyvinyl alcohol resin onto a base film; a step of uniaxially stretching the obtained laminated film; a step of dyeing the polyvinyl alcohol resin layer of the uniaxially stretched laminate film with a dichroic dye to adsorb the dichroic dye to produce a polarizer; treating the film having the dichroic dye adsorbed thereon with an aqueous boric acid solution; and a step of washing with water after the treatment with the aqueous boric acid solution.
The substrate film may be peeled off from the polarizer as necessary. The material and thickness of the base film may be the same as those of the thermoplastic resin film described later.
The polarizer as the stretched film or the stretched layer may be incorporated in the optical member with the colored layer in a form in which a thermoplastic resin film is bonded to one surface or both surfaces thereof. The thermoplastic resin film can function as a protective film or a retardation film for polarizers. The thermoplastic resin film may be formed of a polyolefin resin such as a chain polyolefin resin (e.g., a polypropylene resin) or a cyclic polyolefin resin (e.g., a norbornene resin); cellulose resins such as triacetyl cellulose; polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate; a polycarbonate-based resin; (meth) acrylic resins; or a mixture thereof.
From the viewpoint of thinning, the thickness of the thermoplastic resin film is usually 300 μm or less, preferably 200 μm or less, more preferably 100 μm or less, further preferably 80 μm or less, further preferably 60 μm or less, and usually 5 μm or more, preferably 20 μm or more.
The thermoplastic resin film may or may not have a phase difference.
The thermoplastic resin film may be bonded to the polarizer using an adhesive layer, for example.
(2) Linear polarizing plate having as polarizer film obtained by applying and curing composition containing dichroic dye and polymerizable compound
A linear polarizing plate having a film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound as a polarizer will be described. Examples of the film used as a polarizer, which is obtained by coating and curing a composition containing a dichroic dye and a polymerizable compound, include a film obtained by coating and curing a composition containing a dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a liquid crystal compound on a substrate. The film may be used as a linear polarizing plate by peeling off a substrate or using the film together with a substrate, or may be used as a linear polarizing plate having a thermoplastic resin film on one surface or both surfaces thereof.
The substrate may be a thermoplastic resin film. Examples and thicknesses of the base material may be the same as those exemplified in the description of the thermoplastic resin film described above. The substrate may be a thermoplastic resin film having a hard coat layer, an antireflection layer or an antistatic layer on at least one surface. The substrate may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface of the side where the polarizer is not formed. The substrate may have a hard coat layer, an antireflection layer, an antistatic layer, or the like formed only on the surface on the side where the polarizer is formed.
Examples of the thermoplastic resin film include the same thermoplastic resin films as those of linear polarizing plates provided with the above-described stretched film or stretched layer as a polarizer. The thermoplastic resin film can be bonded to the polarizer using an adhesive layer, for example.
A film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound is preferably thin, but if it is too thin, the strength tends to decrease, and the processability tends to deteriorate. The thickness of the film is usually 20 μm or less, preferably 5 μm or less, and more preferably 0.5 to 3 μm.
Specific examples of the film obtained by applying and curing a composition containing a dichroic dye and a polymerizable compound include films described in japanese patent application laid-open nos. 2013-37353 and 2013-33249.
The polarizing plate 50 may be a circular polarizing plate including a linear polarizing plate and a retardation film. The circularly polarizing plate having the linear polarizing layer and the retardation layer arranged such that the absorption axis of the linear polarizing plate and the slow axis of the retardation layer form a predetermined angle can exhibit an antireflection function. When the phase difference layer comprises a lambda/4 plate, the angle of the absorption axis of the linear polarizer to the slow axis of the lambda/4 plate may be 45 ° ± 10 °. The linear polarizer and the retardation layer may be bonded to each other through a bonding layer described later.
(touch sensor panel)
The touch sensor panel 60 may be bonded to the side of the polarizing plate 50 opposite to the colored layer via a bonding layer. The touch sensor panel 60 is not limited to a detection method as long as it is a sensor capable of detecting a touched position, and examples thereof include touch sensor panels of a resistive film method, a capacitive coupling method, an optical sensing method, an ultrasonic method, an electromagnetic induction coupling method, a surface acoustic wave method, and the like. From the viewpoint of low cost, a touch sensor panel of a resistive film type or a capacitive coupling type is preferably used.
An example of a resistive touch sensor panel includes a pair of substrates arranged to face each other, an insulating spacer sandwiched between the pair of substrates, a transparent conductive film as a resistive film provided on the front surface of the inner side of each substrate, and a touch position detection circuit. In an image display device provided with a resistive touch sensor panel, if the surface of the front panel 30 is touched, the opposing resistive films are short-circuited, and a current flows through the resistive films. The touch position detecting circuit detects the voltage change at this time and detects the touch position.
An example of a capacitive coupling type touch sensor panel includes a substrate, a position detection transparent electrode provided on the entire surface of the substrate, and a touch position detection circuit. In an image display device provided with a capacitive coupling type touch sensor panel, if the surface of the front panel 30 is touched, the transparent electrode is grounded at the touched point via the capacitance of the human body. The touch position detection circuit detects the grounding of the transparent electrode and detects the touched position.
(method of manufacturing optical Member with colored layer)
The method for manufacturing the optical member 200 with the colored layer includes: a step of preparing an optical member 20, a 1 st colored layer forming step of forming a 1 st colored layer 11 on the surface of the optical member 20, and a 2 nd colored layer forming step of forming a 2 nd colored layer 12 on the 1 st colored layer 11 thus formed. As described above, the method for forming the 1 st colored layer 11 and the 2 nd colored layer 12 includes a printing method such as screen printing.
In the 2 nd colored layer forming step, the 2 nd colored layer 12 may be formed so that the end 10f of the 2 nd colored layer 12 on the display area side is positioned closer to the display area side than the end 10g of the 1 st colored layer 11 on the display area side.
When the multilayer structure has 3 or more layers, a coloring layer may be further formed on the 2 nd coloring layer 12, or another coloring layer may be formed on the 1 st coloring layer before the 2 nd coloring layer 12 is formed. When the multilayer structure has 3 or more layers, the outermost layer may be formed so that the end of the outermost layer of the multilayer structure on the display region side is positioned closest to the display region side in the multilayer structure.
(image display device)
The image display device having an optical member or a laminate of the present invention can be used as mobile devices such as smart phones and tablet computers, televisions, digital photo frames, electronic tags, measuring instruments and measuring instruments, office equipment, medical equipment, computer equipment, and the like. As described above, the image display device of the present embodiment can have a good appearance because bubble entanglement between the colored layer and the adhesive layer is suppressed.
Examples
The present invention will be described in more detail below with reference to examples. In the examples, "%" and "part(s)" are% by mass and part(s) by mass unless otherwise specified.
[ evaluation of bubbles ]
The front panel side surface of the pressure-sensitive adhesive layer of the laminate was observed with an optical microscope (manufactured by olympus corporation) to confirm the presence or absence of the generation of bubbles. The case where no bubbles were generated was indicated by "o", and the case where bubbles were generated was indicated by "x".
[ measurement of taper angles of end portions and stepped portions ]
The cross section of the optical member with the colored layer was observed with a scanning electron microscope ("SU 8010" manufactured by hitachi high and new technologies), and the taper angles of the end portion and the step portion were measured in the obtained cross-sectional image.
[ measurement of optical Density ]
An optical member with a colored layer was set as a measurement sample in an optical density measuring instrument (product name: 361T, manufactured by X-rite Co., Ltd.), light was irradiated from a light source to the colored layer side of the measurement sample, and the optical density was measured with the area of the colored layer having the maximum thickness as a measurement area.
[ preparation of composition for Forming colored layer (Black) ]
[ ink Components ]
Acetylene Black 10.0% by mass
80.0% by mass of polyester
Dimethyl glutarate 2.5% by mass
Succinic acid 2.0% by mass
5.5% by mass of isophorone
[ curing agent ]
75.0% by mass of aliphatic polyisocyanate
25.0% by mass of ethyl acetate
[ solvent ]
Isophorone
[ production method ]
To 100 parts by mass of the ink component, 10 parts by mass of a curing agent and 10 parts by mass of a solvent were added and stirred to obtain a composition (black) for forming a colored layer.
[ preparation of composition for Forming colored layer (white) ]
[ ink Components ]
Titanium dioxide 50.0% by mass
39.0% by mass of polyester
Dimethyl glutarate 2.5% by mass
Succinic acid 2.0% by mass
6.5% by mass of isophorone
[ curing agent ]
75.0% by mass of aliphatic polyisocyanate
25.0% by mass of ethyl acetate
[ solvent ]
Isophorone
[ production method ]
To 100 parts by mass of the ink component, 10 parts by mass of a curing agent and 10 parts by mass of a solvent were added and stirred to obtain a composition (white) for forming a colored layer.
< example 1 >
(preparation of front Panel with adhesive layer)
As the front panel, a window film having a thickness of 70 μm in which hard coat layers were formed on both surfaces of a base film (base film 50 μm, hard coat layers 10 μm, 179mm in the vertical direction × 106mm in the horizontal direction) was prepared, and as a pressure-sensitive adhesive layer, a (meth) acrylic pressure-sensitive adhesive layer (thickness 25 μm, 179mm in the vertical direction × 106mm in the horizontal direction) was prepared. The base film of the window film is a polyimide-based resin film, and the hard coat layer is a layer formed from a composition containing a dendritic compound having a polyfunctional acrylic group at the terminal. Thereafter, the surface of the window film that is in contact with the adhesive layer and the surface of the adhesive layer that is in contact with the window film are subjected to corona treatment. Then, the window film was laminated to the adhesive layer to obtain a front panel with an adhesive layer.
(preparation of circular polarizing plate)
After a photo-alignment film was formed on a triacetyl cellulose (TAC) film having a thickness of 25 μm, a composition containing a dichroic dye and a polymerizable liquid crystal compound was applied to a substrate, and alignment and curing were performed to obtain a polarizer having a thickness of 2.5 μm. An acrylic resin composition was applied to the polarizer and cured to obtain an overcoat layer having a thickness of 1 μm. A retardation film including a layer obtained by polymerizing and curing a liquid crystal compound [ thickness 16 μm, layer composition: adhesive layer (thickness 5 μm)/λ/4 plate (thickness 3 μm) composed of layer obtained by curing liquid crystal compound and alignment film/adhesive layer (thickness 5 μm)/positive C plate (thickness 3 μm) composed of layer obtained by curing liquid crystal compound and alignment film. A circularly polarizing plate ("TAC/polarizer/phase difference film" layer configuration, thickness 44.5 μm, length 179 mm. times. width 106mm) fabricated in this manner was obtained.
(formation of optical Member with color layer)
The following describes the steps for producing the optical member with a colored layer with reference to fig. 7. Fig. 7 (1) is a cross-sectional view of the colored layer, and fig. 7 (2) is a top view of the circularly polarizing plate having the colored layer formed thereon.
1) Formation of the 1 st colored layer 11
On the surface of the TAC of the circularly polarizing plate obtained above, a coloring layer forming composition (black) was used as an ink, and printing was performed by screen printing using a 460-mesh screen, after drying, with a coating thickness of 3 μm discharge amount, and drying was performed for 15 minutes to form a 1 st coloring layer composed of a printing layer having a thickness of 3 μm, a vertical (11a) of 4.25mm, and a horizontal (11b) of 11.75 mm.
2) Formation of the 2 nd colored layer 12
On the surface of the 1 st colored layer 11, a 2 nd colored layer 12 composed of a printed layer having a thickness of 3 μm, a vertical (12a)4.50mm, and a horizontal (12b)12.00mm was formed by printing a discharge amount of 3 μm in coating thickness after drying by screen printing using a 460-mesh screen using a colored layer forming composition (black) as ink so that the end portion of the 2 nd colored layer 12 on the display region side was positioned closer to the display region side than the end portion of the 1 st colored layer 11 on the display region side, and drying for 15 minutes.
3) Formation of the 3 rd colored layer 13
On the surface of the 2 nd colored layer 12, a 3 rd colored layer 13 composed of a printed layer having a thickness of 5 μm, a vertical (13a)3.75mm, and a horizontal (13b)11.25mm was formed by printing a discharge amount of 5 μm in coating thickness after drying by screen printing using a 460-mesh screen using a colored layer forming composition (white) as ink so that the end portion of the 1 st colored layer 11 on the display area side was positioned closer to the display area side than the end portion of the 3 rd colored layer 13 on the display area side, and drying for 15 minutes.
4) Formation of the 4 th colored layer 14
On the surface of the 3 rd colored layer 13, the 4 th colored layer 14 composed of a printed layer having a thickness of 5 μm, a vertical (14a)3.50mm, and a horizontal (14b)11.00mm was formed by printing a discharge amount of 5 μm in coating thickness after drying by screen printing using a 460-mesh screen using a colored layer forming composition (white) as ink so that the end portion of the 3 rd colored layer 13 on the display area side was positioned closer to the display area side than the end portion of the 4 th colored layer 14 on the display area side, and drying for 15 minutes.
5) Formation of 5 th colored layer 15
On the surfaces of the 3 rd colored layer 13 and the 4 th colored layer 14, the 5 th colored layer 15 composed of a printed layer having a thickness of 5 μm, a length (15a) of 4.00mm, and a length (15b) of 11.50mm was formed by using a composition for forming a colored layer (white) as an ink, printing with a discharge amount of 5 μm after drying by screen printing using a 460-mesh screen so that the end portion of the 5 th colored layer 15 on the display region side was positioned closer to the display region side than the end portion of the 3 rd colored layer 13 on the display region side and the end portion of the 2 nd colored layer 12 on the display region side than the end portion of the 5 th colored layer 15 on the display region side, and drying for 15 minutes.
The maximum thickness of the colored layer was 21 μm, and the optical density of the maximum thickness portion was 5.91.
The taper angle at the end of the colored layer and the taper angle at the level difference were measured.
(preparation of laminate)
The surface of the adhesive layer of the front panel with the adhesive layer and the surface of the circularly polarizing plate on which the colored layer is formed are subjected to corona treatment, and the front panel with the adhesive layer and the circularly polarizing plate on which the colored layer is formed are laminated so that the corona-treated surfaces are on the inner side, and the laminate is obtained by laminating them by a roll laminator. The presence or absence of air bubbles in the portion of the obtained laminate where the taper angle was measured was evaluated. The results are shown in Table 1.
< comparative example 1 >
A front panel with an adhesive layer and a circularly polarizing plate were produced in the same manner as in example 1.
(formation of optical Member with color layer)
The following describes the steps for producing the optical member with a colored layer with reference to fig. 8. Fig. 8 (1) is a cross-sectional view of the colored layer, and fig. 8 (2) is a top view of the circularly polarizing plate having the colored layer formed thereon.
1) Formation of the 1 st colored layer 71
On the surface of the TAC of the circularly polarizing plate thus produced, a coloring layer forming composition (black) was used as an ink, and a 460-mesh screen was used to perform printing with a coating thickness of 3 μm after drying by screen printing, followed by drying for 15 minutes, to form a 1 st coloring layer composed of a printing layer having a thickness of 3 μm, a vertical (71a) of 4.25mm, and a horizontal (71b) of 11.75 mm.
2) Formation of the 2 nd colored layer 72
On the surface of the 1 st colored layer 71, a 2 nd colored layer 72 composed of a printed layer having a thickness of 3 μm, a vertical (72a)4.50mm, and a horizontal (72b)12.00mm was formed by printing a discharge amount of 3 μm in coating thickness after drying by screen printing using a 460-mesh screen using a colored layer forming composition (black) as ink so that the end portion of the 2 nd colored layer 72 on the display area side was positioned closer to the display area side than the end portion of the 1 st colored layer 71 on the display area side.
3) Formation of the 3 rd colored layer 73
On the surface of the 2 nd colored layer 72, a 3 rd colored layer 73 composed of a printed layer having a thickness of 5 μm, a vertical (73a)4.00mm, and a horizontal (73b)11.50mm was formed by printing a discharge amount of 5 μm in coating thickness after drying by screen printing using a 460-mesh screen using a colored layer forming composition (white) as ink so that the end portion of the 1 st colored layer 71 on the display area side was positioned closer to the display area side than the end portion of the 3 rd colored layer 73 on the display area side, and drying for 15 minutes.
4) Formation of the 4 th colored layer 74
On the surface of the 3 rd colored layer 73, a 4 th colored layer 74 composed of a printed layer having a thickness of 5 μm, a vertical (74a) of 4.00mm, and a horizontal (74b) of 11.50mm was formed by printing with a 460-mesh screen using a colored layer forming composition (white) as an ink and a coating thickness of 5 μm after drying by screen printing so that the position of the end portion on the display region side of the 4 th colored layer 74 was the same as the position of the end portion on the display region side of the 3 rd colored layer 73, and drying for 15 minutes.
5) Formation of the 5 th colored layer 75
On the surface of the 4 th colored layer 74, the 5 th colored layer 75 composed of a printed layer having a thickness of 5 μm, a vertical (75a) of 4.00mm, and a horizontal (75b) of 11.50mm was formed by printing with a 460-mesh screen using a coloring layer forming composition (white) as an ink and a coating thickness of 5 μm after drying by screen printing so as to have the same position as the display region side end of the 3 rd colored layer 73, and drying for 15 minutes.
The maximum thickness of the colored layer was 21 μm, and the optical density of the maximum thickness portion was 5.90.
The taper angle at the end of the colored layer and the taper angle at the level difference were measured.
(preparation of laminate)
The surface of the circularly polarizing plate obtained in the above manner on which the colored layer was formed was bonded to the surface of the adhesive layer of the front panel with an adhesive layer, thereby obtaining a laminate in the same manner as in example 1. The presence or absence of air bubbles in the portion of the obtained laminate where the taper angle was measured was evaluated. The results are shown in Table 1.
[ Table 1]
Description of the symbols
10 colored layers, 10a tapered portions, 10b, 10e taper angles, 10c step portions, 10a, 10d tapered portions, 10f, 10g end portions, 11 st colored layer, 1 st colored layer, 12 nd colored layer, 2 nd colored layer, 13 rd colored layer, 3 rd colored layer, 14 th colored layer, 4 th colored layer, 15 th colored layer, 20 optical member, 30 front panel, 40 adhesive layer, 50 polarizing plate, 60 touch sensor panel, 100, 200 optical member with colored layers, 121 display region, 122 non-display region, 300 laminated body.
Claims (11)
1. An optical member with a colored layer, comprising an optical member and a colored layer provided on one surface of the optical member,
the optical member with the colored layer is divided into a display region and a non-display region in a plan view,
the colored layer is provided in the non-display region,
the colored layer has 1 or more step portions so that the thickness of the colored layer on the display region side is reduced,
in the colored layer, cross-sectional shapes of the end portion on the display region side and the level difference portion are both tapered shapes having a taper angle of 15 ° or less.
2. The optical member with a colored layer according to claim 1, wherein the colored layer has a multilayer structure.
3. The optical member with color layers according to claim 2, wherein each of the layers of the multilayer structure has a tapered shape having a taper angle of 15 ° or less at an end portion on the display region side.
4. The optical member with color layers according to claim 2 or 3, wherein positions of the ends on the display region side in the respective layers of the multilayer structure are different from each other.
5. The optical member with a colored layer according to any one of claims 2 to 4, wherein an end portion of the outermost layer of the multilayer structure on the display region side is positioned on the most display region side in the multilayer structure.
6. Optical component with color layers according to one of claims 2 to 5, wherein the color of the individual layers of the multilayer structure is the same.
7. The optical member with a colored layer according to any one of claims 2 to 6, wherein the colored layer has a multilayer structure of 2 or more different colors.
8. The optical member with a colored layer according to any one of claims 1 to 7, wherein the maximum thickness of the colored layer is 30 μm or less.
9. Optical component with color layer according to any of claims 1 to 8, wherein the optical component is selected from the group consisting of front panel, polarizer and touch sensor panel.
10. A laminate comprising the optical member with a colored layer according to any one of claims 1 to 9 and a laminating layer on the colored layer side of the optical member with a colored layer.
11. An image display device comprising the optical member with a colored layer according to any one of claims 1 to 9 or the laminate according to claim 10.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019076221A JP2020173386A (en) | 2019-04-12 | 2019-04-12 | Optical member with colored layer, laminate, and image display device |
| JP2019-076221 | 2019-04-12 | ||
| PCT/JP2020/012633 WO2020209037A1 (en) | 2019-04-12 | 2020-03-23 | Colored layer-equipped optical member, laminated body, and image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113678184A true CN113678184A (en) | 2021-11-19 |
Family
ID=72751833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080027216.0A Pending CN113678184A (en) | 2019-04-12 | 2020-03-23 | Optical member with colored layer, laminate, and image display device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2020173386A (en) |
| KR (1) | KR20210149738A (en) |
| CN (1) | CN113678184A (en) |
| TW (1) | TW202043878A (en) |
| WO (1) | WO2020209037A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4230339A4 (en) | 2020-10-14 | 2024-04-17 | Amada Co Ltd | Laser processing device and nozzle inspection method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000029014A (en) * | 1998-07-07 | 2000-01-28 | Sharp Corp | Color filter substrate for liquid crystal display element and liquid crystal display element |
| CN1550839A (en) * | 2003-05-06 | 2004-12-01 | 精工爱普生株式会社 | Base board for electrooptical device, electrooptical device and its manufacturing method and electronic device |
| CN1725087A (en) * | 2004-07-21 | 2006-01-25 | 夏普株式会社 | Color filter substrate and liquid crystal display device |
| CN1912738A (en) * | 2005-07-28 | 2007-02-14 | 三菱电机株式会社 | Substrate with light-shielding film, color filter substrate, method of manufacture of both, and display device having substrate with light-shielding film |
| JP2012088934A (en) * | 2010-10-20 | 2012-05-10 | Alps Electric Co Ltd | Input device and method for manufacturing input device |
| JP2014238533A (en) * | 2013-06-10 | 2014-12-18 | 日東電工株式会社 | Optical member and image display device |
| CN106103094A (en) * | 2014-03-07 | 2016-11-09 | 富士胶片株式会社 | Substrate and manufacture method, contact panel and information display device with ornament materials |
| CN106232735A (en) * | 2014-05-07 | 2016-12-14 | 富士胶片株式会社 | The transfer materials of dispersible pigment dispersion, decoration material, decoration material formation, the base material of band decoration material, touch screen, information display device, graft type silicone polymer |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003241185A (en) * | 2002-02-20 | 2003-08-27 | Matsushita Electric Ind Co Ltd | Liquid crystal display device and its manufacturing method |
| JP4121540B2 (en) * | 2004-02-20 | 2008-07-23 | 日本写真印刷株式会社 | Electronic equipment with a protective panel on the display window |
| US7195813B2 (en) * | 2004-05-21 | 2007-03-27 | Eastman Kodak Company | Mixed absorber layer for displays |
| KR101157297B1 (en) * | 2005-11-08 | 2012-06-15 | 니폰샤신인사츠가부시키가이샤 | Design panel |
| JP2006139299A (en) * | 2005-12-26 | 2006-06-01 | Toppan Printing Co Ltd | Color filter and method of manufacturing the same |
| JP2011203310A (en) * | 2010-03-24 | 2011-10-13 | Dainippon Printing Co Ltd | Front plate for image display apparatus, and image display apparatus |
| KR101736986B1 (en) * | 2010-09-27 | 2017-05-30 | 삼성디스플레이 주식회사 | Display device |
| WO2014073316A1 (en) | 2012-11-09 | 2014-05-15 | 三菱樹脂株式会社 | Double-sided adhesive sheet for image display device, double-sided adhesive sheet with release film for image display device and image display device using same |
| KR102004220B1 (en) * | 2012-12-03 | 2019-07-29 | 삼성디스플레이 주식회사 | Display device and method manufacturing the same |
| KR102049909B1 (en) * | 2013-02-12 | 2019-11-29 | 삼성디스플레이 주식회사 | Image display apparatus |
| KR20150042046A (en) | 2013-10-10 | 2015-04-20 | 삼성전기주식회사 | Touch sensor |
| KR20170039809A (en) | 2015-10-01 | 2017-04-12 | 삼성디스플레이 주식회사 | Window substrate and display apparatus including the same |
| JP6631269B2 (en) * | 2016-01-19 | 2020-01-15 | 大日本印刷株式会社 | Decorative member, display device, and method of manufacturing organic electroluminescence display device |
| CN108181758B (en) * | 2018-01-03 | 2020-11-20 | 上海天马微电子有限公司 | Shading double-sided tape and display device |
-
2019
- 2019-04-12 JP JP2019076221A patent/JP2020173386A/en active Pending
-
2020
- 2020-03-23 CN CN202080027216.0A patent/CN113678184A/en active Pending
- 2020-03-23 WO PCT/JP2020/012633 patent/WO2020209037A1/en active Application Filing
- 2020-03-23 KR KR1020217032872A patent/KR20210149738A/en unknown
- 2020-03-31 TW TW109111065A patent/TW202043878A/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000029014A (en) * | 1998-07-07 | 2000-01-28 | Sharp Corp | Color filter substrate for liquid crystal display element and liquid crystal display element |
| CN1550839A (en) * | 2003-05-06 | 2004-12-01 | 精工爱普生株式会社 | Base board for electrooptical device, electrooptical device and its manufacturing method and electronic device |
| CN1725087A (en) * | 2004-07-21 | 2006-01-25 | 夏普株式会社 | Color filter substrate and liquid crystal display device |
| CN1912738A (en) * | 2005-07-28 | 2007-02-14 | 三菱电机株式会社 | Substrate with light-shielding film, color filter substrate, method of manufacture of both, and display device having substrate with light-shielding film |
| JP2012088934A (en) * | 2010-10-20 | 2012-05-10 | Alps Electric Co Ltd | Input device and method for manufacturing input device |
| JP2014238533A (en) * | 2013-06-10 | 2014-12-18 | 日東電工株式会社 | Optical member and image display device |
| CN106103094A (en) * | 2014-03-07 | 2016-11-09 | 富士胶片株式会社 | Substrate and manufacture method, contact panel and information display device with ornament materials |
| CN106232735A (en) * | 2014-05-07 | 2016-12-14 | 富士胶片株式会社 | The transfer materials of dispersible pigment dispersion, decoration material, decoration material formation, the base material of band decoration material, touch screen, information display device, graft type silicone polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210149738A (en) | 2021-12-09 |
| TW202043878A (en) | 2020-12-01 |
| WO2020209037A1 (en) | 2020-10-15 |
| JP2020173386A (en) | 2020-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20210005063A (en) | Optical laminate and its manufacturing method | |
| CN110780482A (en) | Laminate and method for producing same | |
| CN111458782A (en) | Flexible laminate and image display device provided with same | |
| CN111458781A (en) | Flexible laminate and image display device provided with same | |
| TW202129952A (en) | Layered body and image display device | |
| WO2019208168A1 (en) | Optical layered body and method for producing same | |
| CN113678184A (en) | Optical member with colored layer, laminate, and image display device | |
| KR20210005064A (en) | Optical laminate and its manufacturing method | |
| KR20200021418A (en) | Composite front plate and method for producing the same | |
| JP6930017B2 (en) | Flexible optical laminate and image display device | |
| WO2020179371A1 (en) | Stack and image display device | |
| WO2021014801A1 (en) | Optical laminate and production method for same | |
| WO2019208167A1 (en) | Optical layered body and method for producing same | |
| CN112839806A (en) | Optical laminate and display device | |
| WO2020075420A1 (en) | Optical laminate and method for manufacturing same | |
| CN114675353A (en) | Optical laminate and display device | |
| CN110843266A (en) | Composite front panel and method of manufacturing the same | |
| CN115335740A (en) | Laminated body | |
| CN114791643A (en) | Optical laminate and display device | |
| CN115349100A (en) | Laminated body | |
| CN114660684A (en) | Optical laminate and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211119 |
|
| WD01 | Invention patent application deemed withdrawn after publication |