KR20210012896A - Optical laminate and method of manufacturing the same - Google Patents

Abstract

The present invention relates to an optical laminate with excellent bending performance and, more specifically, to an optical laminate comprising: a flexible window; and at least one optical member provided under the flexible window, wherein in the opposite end of the optical member, the most retracted end of the optical member is located inwardly from the end of the flexible window at a distance of less than 2.0 mm.

Description

Optical laminate and its manufacturing method TECHNICAL FIELD [OPTICAL LAMINATE AND METHOD OF MANUFACTURING THE SAME}

The present invention relates to an optical laminate and a method for manufacturing the same.

Recently, various display devices such as a liquid crystal display (LCD) and input devices using a touch panel in combination with a display device have been widely used. For example, a touch panel is installed in a mobile device such as a smart phone or a tablet.

Display devices such as display devices and input devices have a glass window for display protection on the display panel in order to protect the display panel from scratches or external impacts. In general, an optical member such as a touch panel and a polarizing plate is used as a window using an adhesive. It is provided in a form of stacking in a smaller size.

On the other hand, flexible displays that can maintain display performance even if they bend like paper by using a flexible material such as plastic instead of glass, which is not flexible, is rapidly emerging as a next-generation display device.

There have been attempts to change the glass window into a flexible window in order to apply it to such a flexible display. However, in the case of lamination of the optical member using an adhesive with a size smaller than that of the flexible window, the exposed part of the flexible window causes damage when bending. As a result, there may be a problem that the bending performance is slightly deteriorated, and the aspect ratio is slightly lost depending on the non-display area corresponding to the size difference between the flexible window and the optical member.

Korean Patent Application Publication No. 2015-0092777 relates to a display device and a method of manufacturing a display device, comprising: a lower substrate, a switching element disposed on the lower substrate, a light emitting structure disposed on the switching element, and disposed on the light emitting structure A display panel including an encapsulation unit, a display area, and a peripheral area surrounding the display area; An adhesive member disposed on the display panel; A transparent member disposed on the adhesive member; A light blocking member disposed on a bottom surface of the transparent member in the peripheral area; A phase delay layer disposed between the display panel and the adhesive member; And a linear polarizing layer disposed between the adhesive member and the transparent member and partially overlapping the light blocking member.

However, a conventional technique such as the above document still has a large non-display area, resulting in loss of aspect ratio, and does not provide an alternative to the bending performance.

Republic of Korea Patent Publication No. 2015-0092777 (2015.08.17.)

An object of the present invention is to reduce an unnecessary shielding area to improve an aspect ratio and provide an optical laminate having excellent bending performance.

In addition, an object of the present invention is to provide a method of manufacturing an optical laminate capable of reducing unnecessary shielding areas and suppressing the occurrence of cracks during bending evaluation.

The present invention is a flexible window; And at least one or more optical members provided under the flexible window, wherein the opposite end of the optical member has a most retracted end of the optical member at a distance of 2.0 mm inward from the end of the flexible window. It provides an optical laminate located below.

In addition, the present invention provides a step of providing at least one or more optical members; Providing a flexible window on the optical member; Bonding the optical member and the flexible window; And cutting the bonded optical member and the flexible window at least once per cell unit, wherein the opposite end of the optical member has a most retracted end of the optical member from the end of the flexible window. It provides a method for manufacturing an optical laminate that is cut to be located at a distance of less than 2.0 mm inward.

The optical laminate according to the present invention has the advantage of having a wide aspect ratio and excellent bending performance.

In addition, the method of manufacturing an optical laminate according to the present invention has the advantage of reducing the non-display area and suppressing the occurrence of cracks during the bending evaluation.

1 is a diagram illustrating a conventional optical laminate and an aspect ratio thereof.
2 is a diagram illustrating the structure of an optical laminate according to the present invention.
3 is a diagram illustrating a width of a display area, a non-display area, and a non-display area.
4 is a diagram illustrating a case where a conventional optical laminate is bent.
5 is a diagram illustrating a case in which the optical laminate according to the present invention is bent.
6 is a diagram illustrating a bending test method according to an experimental example.
7A is a diagram illustrating a method of testing IN-FOLDING and OUT-FOLDING bending according to a conventional optical laminate (comparative example) and locations of major cracks according to bending.
7B is a diagram illustrating a method of testing IN-FOLDING and OUT-FOLDING bending according to an optical laminate (Experimental Example) of the present invention, and locations of major cracks according to bending.
8A to 8E are diagrams illustrating a structure and a deviation part of an optical laminate according to an embodiment.
9A to 9C are diagrams illustrating a structure and a deviation portion of an optical laminate according to a comparative example.

Hereinafter, the present invention will be described in more detail.

In the present invention, when a member is positioned "on" another member, this includes not only the case where the member is in direct contact with the other member, but also the case where another member is interposed between the two members.

In the present invention, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise specified.

[Flexible window]

In the present invention, the flexible window will be described in more detail.

A flexible window is a kind of a part of a window, and a "flexible window" can be mixed with a "flexible window". The flexible window may include a hard coat layer on at least one surface of the flexible transparent substrate. The flexible window is not rigid or stiff like conventional glass, and includes a transparent substrate having a flexible characteristic and a hard coat layer on at least one surface of the transparent substrate. It serves to protect other components of the image display device from external shocks or changes in ambient temperature and humidity.

The thickness of the hard coat layer of the flexible window is not particularly limited, and may be, for example, 2 to 100 μm. When the thickness of the hard coat layer is less than 2 μm, it is difficult to secure sufficient impact resistance, and when it exceeds 100 μm, the bending resistance decreases and a problem of curling due to cure shrinkage may occur.

The hard coat layer may be formed through curing of a hard coating composition including a reactive material that forms a crosslinked structure by irradiating light or thermal energy.

The hard coat layer may be formed through curing of a hard coating composition including a photocurable (meth)acrylate monomer or oligomer and a photocurable epoxy monomer or oligomer at the same time, but is not limited thereto.

In addition, the flexible window may be made of a polyimide, polyimideamide, or polyethylene terephthalate film material, and in this case, it is preferable because it is flexible and has excellent hardness, but is not limited thereto.

The flexible window may be manufactured directly as described above, or may be applied by purchasing a commercially available film.

In one embodiment of the present invention, the flexible window may have a thickness of 5 μm to 200 μm, preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and in this case, It is preferable because it has the advantage of maintaining hardness and securing flexibility.

[End of optical member]

The optical laminate according to the present invention includes at least one optical member provided under the flexible window, wherein the opposite end of the optical member is the most retracted end of the optical member. It is located at a distance of less than 2.0 mm, preferably less than 1.2 mm, more preferably less than 1.0 mm, most preferably less than 0.03 mm, from the end of the window inward.

In the present invention, "end" refers to a flexible window, an end part of an optical member, and "opposite end" refers to "both ends" facing each other. Specifically, the positional relationship of the optical members included in the laminate is determined by the position of the end of the laminate. For example, in the case of cutting in a direction orthogonal to the stacking direction as shown in FIG. 2, a closer look at the end thereof may be shown as in FIGS. 8A to 9C. Specifically, when an imaginary line orthogonal to the stacking direction from the end of the cut flexible window is represented by a dotted line as a reference line, the position of the end with respect to the remaining optical members is a distance from the dotted line (indicated by an arrow). The distance between the end of the flexible window and the end of the optical member can be obtained by measuring the distance in the direction along the plane direction between the end of the cut flexible window and the position of the end of another optical member.

In addition, the fact that the end of the optical member according to the present invention is located at a distance of less than 2.0mm inward from the end of the flexible window means that when the end of the optical member is retracted from the end of the flexible window to the range, the optical It can be said that the distance between the end of the member and the end of the flexible window is less than 2.0 mm at most.

In this case, the distance may more specifically refer to the shortest length between the surface including the end of the flexible window and the surface including the end of each optical member to be measured.

In one embodiment of the present invention, the most protruding end and the most retracted end of the optical member may be located at a distance of 0.2 mm or less to the outside from the end of the flexible window to 2.0 mm or less.

The fact that the end of the optical member according to the present invention is located at a distance of 0.2 mm or less outward from the end of the flexible window is that when the end of the optical member protrudes from the end of the flexible window into the range, the end of the optical member It may be said that the distance between the end of the flexible window and the flexible window is at most 0.2 mm.

In addition, in the present invention, "optical member" refers to "all optical members" included in the optical laminate. For example, the optical laminate according to the present invention includes a flexible window and a polarizing plate, a touch sensor, and a base material under the flexible window. In the case of including a layered optical member, opposite ends of all ends of the polarizing plate, the touch sensor, and the substrate are provided at a distance of less than 2.0 mm inward from the end of the flexible window with the most retracted end.

When the optical laminate according to the present invention includes a flexible window and an optical member consisting of three layers of a polarizing plate, a touch sensor, and a substrate under the flexible window, preferably, opposite ends of all of the respective ends of the polarizing plate, the touch sensor, and the substrate The most retracted end may be provided at a distance of 0.2 mm or less outward from the end of the flexible window to an inward distance of less than 2.0 mm.

When the optical laminate according to the present invention includes a flexible window and an optical member composed of three layers of a polarizing plate, a touch sensor, and a substrate under the flexible window, more preferably, the polarizing plate, the touch sensor, and the substrate all face each end. The end and the most retracted end may be provided at a distance of less than 2.0 mm inward from the end of the flexible window.

All opposite ends constituting the surface of the optical member have a distance of 0.2 mm or less, preferably 0.15 mm or less, more preferably 0.02 mm or less, with the most protruding end and the most retracted end outward from the flexible window. To the inward distance of less than 2.0mm, 1.2mm or less, preferably 1.0mm or less, more preferably 0.03mm or less, but is not limited thereto. However, it is preferable that all opposite ends parallel to the bending direction satisfy the above condition.

In the optical laminate according to the present invention, since the end of the optical member is located within the range from the end of the flexible window, the non-display area can be reduced and the aspect ratio can be enlarged.

In addition, it is possible to suppress the occurrence of cracks at the ends during the bending evaluation, and thus there is an advantage of excellent flexibility.

In short, the optical laminate according to the present invention may have a depression of less than 2.0 mm based on the end of the flexible window. In addition, the optical laminate according to the present invention may have a protrusion of 0.2 mm or less based on the end of the flexible window.

The optical laminate of the present invention may further include a transparent material, wherein the end of the transparent material is positioned within a distance of less than 2.0 mm from the end of the flexible window. In addition, the end of the transparent material may be located at a distance of 0.2mm or less to the outside from the end of the fusible widow to a distance of 2.0mm or less to the inside.

When the number of the transparent material is 2 or more, the most retracted end of the transparent material is located at a distance of less than 2.0 mm inward from the end of the flexible window. The transparent material may be a flexible transparent material, and the contents to be described later may be applied.

The transparent material may be included in each optical member to be described later, or may be included in an optical laminate separately from the optical member.

More preferably, when the transparent material is 2 or more, the most protruding end and the most retracted end of the transparent material may be located at a distance of 0.2 mm or less to the outside from the end of the flexible window to less than 2.0 mm. I can.

[Transparent materials]

The transparent substrate may mean a substrate having a transmittance of 70% or more or 80% or more of visible light. As the transparent substrate, any transparent polymer film may be used. Specifically, cycloolefin derivatives, cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl ester cellulose, propy) having units of a monomer containing a cycloolefin such as norbornene or polycyclic norbornene-based monomers. Onyl cellulose, butyryl cellulose, acetylpropionyl cellulose) ethylene-vinyl acetate copolymer, polycycloolefin, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyamideimide, polyethersulfone, poly Sulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate , Polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyurethane, may be a film formed of a polymer such as epoxy, and may be a non-stretched uniaxial or biaxially stretched film.

These polymers may be used alone or in combination of two or more. Preferably, among the above-described transparent materials, a polyamide film, polyamideimide film or polyimide film, polyester film, olefin film, acrylic film, and cellulose film having excellent transparency and heat resistance may be used. In the polymer film, inorganic particles such as silica, organic fine particles, rubber particles, and the like are preferably dispersed. In addition, a compounding agent such as a colorant such as a pigment or dye, an optical brightener, a dispersant, a plasticizer, a heat stabilizer, a light stabilizer, an infrared absorber, an ultraviolet absorber, an antistatic agent, an antioxidant, and a lubricant may be contained. The thickness of the substrate may be 5 to 200 μm, preferably 20 to 100 μm.

[Non-display area]

In yet another embodiment of the present invention, the optical laminate includes a non-display area defined around the optical laminate, and the width of the non-display area is 15 mm or less, preferably 10 mm or less, and further Preferably it may be 6 mm or less. The width of the non-display area is usually 0.5 mm or more.

In the present invention, the "non-display area" may refer to a portion not covered by the bezel portion of the main body of the display device (FIG. 3), and may refer to an area in which an image is not visually recognized. In addition, the "non-display area" may be used interchangeably with the "shielding area".

The optical laminate according to the present invention includes the flexible window at the outermost portion, and at this time, various optical members, substrates, etc. located under the flexible window have an end of the most retracted optical member of the flexible window. It is located at a distance of less than 2.0 mm inward from the end.

More preferably, the various optical members, substrates, etc. located under the flexible window have the most protruding end and the most retracted end of the optical member at a distance of 0.2 mm or less to the outside from the end of the flexible window. It can be located with a distance of less than 2.0mm.

In general, the display area is surrounded by a non-display area. When the non-display area is wide, the aspect ratio may be reduced, but the width of the non-display area in the optical laminate according to the present invention is reduced to less than 2.0 mm from the two sides facing each other. There is an advantage in that the aspect ratio is improved.

In the present invention, "aspect ratio" refers to "display area / (display area + non-display area)", and "aspect ratio" refers to the ratio of the width and height of the display area. That is, the aspect ratio increases as the display area increases, and increases as the non-display area decreases.

In addition, the optical laminate according to the present invention has an advantage of excellent bending durability because it is possible to suppress the occurrence of cracks at the ends during the bending evaluation.

[Optical member]

The optical laminate of the present invention includes the above-described flexible window and at least one optical member provided under the flexible window.

The optical member may be positioned above the display panel, may be a polarizing plate, and a touch sensor, and may provide protection, improved visibility, and user input functions, respectively.

Specifically, the optical member may include one or more selected from the group consisting of a polarizing plate and a touch sensor.

The optical member may be a stacked body including at least one of the polarizing plate and a touch sensor according to a required function, and examples of the stacking order include a flexible window, a polarizing plate, a touch sensor or a flexible window, a touch sensor, a polarizing plate from the viewing side. Can be stacked in the order of. In this case, if the polarizing plate is present on the viewing side of the touch sensor, the pattern of the touch sensor is not easily recognized, and the visibility of the display image may be improved, which is more preferable. When composed of the above laminate, each member may be laminated using an adhesive layer or the like. In addition, for the purpose of shielding wiring of the display panel from being visually recognized, a light shielding pattern may be formed on at least one surface of one of the flexible window, the polarizing plate, and the touch sensor.

[Polarizer]

The polarizing plate may be configured with a polarizing layer alone or a polarizing layer and a transparent substrate attached to at least one surface thereof, and is classified into a linear polarizing plate and a circular polarizing plate according to the polarization state of light emitted through the polarizing plate. Hereinafter, although not particularly limited in the present description, a circular polarizing plate that can be used to improve visibility by absorbing reflected light will be described in detail.

The circular polarizing plate is a functional layer having a function of transmitting only a right or left circularly polarized light component by laminating a λ/4 retardation plate on a linear polarizing plate. For example, it is used to convert external light into right circularly polarized light, block external light reflected from the organic EL panel and become left circularly polarized light, and to suppress the influence of reflected light by transmitting only the light emission component of organic EL to make the image easier to see. . In order to achieve the circular polarization function, the absorption axis of the linear polarizing plate and the slow axis of the λ/4 retardation plate should be 45° in theory, but are 45±10° in practical use. The linear polarizing plate and the λ/4 retardation plate do not necessarily need to be stacked adjacent to each other, and the relationship between the absorption axis and the slow axis may satisfy the above range. It is desirable to achieve complete circular polarization at all wavelengths, but since it is not necessary for practical purposes, the circular polarizing plate of the present invention may also include an elliptically polarizing plate. It is also preferable to increase the visibility in a state of wearing polarized sunglasses by laminating a λ/4 retardation film so as to be closer to the viewing side of the linear polarizing plate to make the outgoing light circularly polarized.

The linear polarizer is a functional layer that passes light vibrating in the direction of a transmission axis, but blocks polarization of a vibration component perpendicular to it. The linear polarizing plate may be configured with a linear polarizing layer alone or a linear polarizing layer and a protective film attached to at least one surface thereof. As the protective film, those exemplified as the above-described transparent substrate can be used. The thickness of the linear polarizing plate may be 200 μm or less, and preferably 0.5 μm to 100 μm. If the thickness exceeds 200㎛, the flexibility may be reduced.

The linear polarizing layer may be a film-type polarizing layer manufactured by dyeing and stretching a polyvinyl alcohol (PVA)-based film. A dichroic dye such as iodine is adsorbed to a PVA-based film oriented by stretching or stretched in a state in which it is adsorbed to PVA, whereby the dichroic dye is oriented to exhibit polarization performance. In the production of the film-type polarizing layer, other steps such as swelling, crosslinking with boric acid, washing with an aqueous solution, and drying may be included. The stretching and dyeing process may be carried out by the PVA-based film alone, or in a state of being laminated with another film such as polyethylene terephthalate. The PVA-based film to be used preferably has a thickness of 10 to 100 μm and a draw ratio of 2 to 10 times.

Further, another example of the polarizing layer may be a liquid crystal coating type polarizing layer formed by applying a liquid crystal polarizing composition. The liquid crystal polarizing composition may include a liquid crystal compound and a dichroic dye compound. As the liquid crystalline compound, it is sufficient to have a property of exhibiting a liquid crystal state, and in particular, one having a high-order alignment state such as a smectic phase is preferable because it can exhibit high polarization performance. It is also preferable to have a polymerizable functional group. The dichroic dye compound is a dye that is oriented together with the liquid crystal compound to exhibit dichroism, and the dichroic dye itself may have liquid crystal properties and may have a polymerizable functional group. One compound of the liquid crystal polarizing composition has a polymerizable functional group, and the liquid crystal polarizing composition may include an initiator, a solvent, a dispersant, a leveling agent, a stabilizer, a surfactant, a crosslinking agent, a silane coupling agent, and the like. The liquid crystal coating type polarizing layer can be prepared by applying a liquid crystal polarizing composition to an alignment layer to form a liquid crystal polarizing layer. The liquid crystal coating type polarizing layer may have a thinner thickness compared to the film type polarizing layer. The liquid crystal coated polarizing layer may have a thickness of 0.5 to 10 μm, preferably 1 to 5 μm.

The alignment film can be produced, for example, by applying an alignment film-forming composition on a substrate and imparting alignment by rubbing, polarized light irradiation, or the like. The alignment layer forming composition includes an alignment agent, and may include a solvent, a crosslinking agent, an initiator, a dispersant, a leveling agent, a silane coupling agent, and the like. As the aligning agent, for example, polyvinyl alcohol, polyacrylates, polyamic acids, and polyimides can be used. When applying photo-alignment, it is preferable to use an aligning agent containing a cinnamate group. The polymer used as the alignment agent may have a weight average molecular weight of about 10,000 to 1,000,000. The thickness of the alignment layer is preferably 5 nm to 10,000 nm, and particularly preferably 10 nm to 500 nm, since the orientation regulating force is sufficiently expressed. The liquid crystal polarizing layer may be laminated by peeling and transferring from the substrate, and the substrate may be laminated as it is. It is also preferable that the substrate serves as a protective film, a retardation plate, or a transparent substrate for a flexible window.

The protective film may be a transparent polymer film, and materials and additives used for the transparent substrate may be used. The above-described contents may be applied to the transparent material.

The λ/4 retardation plate is a film that imparts a λ/4 phase difference in a direction perpendicular to the traveling direction of incident light (in-plane direction of the film). The λ/4 retardation plate may be a stretched retardation plate manufactured by stretching a polymer film such as a cellulose film, an olefin film, or a polycarbonate film. If necessary, a phase difference adjuster, a plasticizer, an ultraviolet absorber, an infrared absorber, a colorant such as a pigment and a dye, a fluorescent whitening agent, a dispersant, a heat stabilizer, a light stabilizer, an antistatic agent, an antioxidant, a lubricant, a solvent, and the like may be included. The thickness of the stretched retardation plate may be 200 μm or less, preferably 1 μm to 100 μm. If the thickness exceeds 200㎛, the flexibility may be reduced.

Further, another example of the λ/4 retardation plate may be a liquid crystal coated retardation plate formed by applying a liquid crystal composition. The liquid crystal composition includes a liquid crystal compound having a property of exhibiting a liquid crystal state such as nematic, cholesteric, and smectic. One compound containing a liquid crystal compound in the liquid crystal composition has a polymerizable functional group. The liquid crystal coated retardation plate may further include an initiator, a solvent, a dispersant, a leveling agent, a stabilizer, a surfactant, a crosslinking agent, a silane coupling agent, and the like. The liquid crystal coating type retardation plate can be manufactured by forming a liquid crystal retardation layer by coating and curing a liquid crystal composition on an alignment layer as described in the liquid crystal polarizing layer. The liquid crystal coated retardation plate may have a thinner thickness compared to the stretched retardation plate. The thickness of the liquid crystal phase difference layer may be 0.5 to 10 μm, preferably 1 to 5 μm. The liquid crystal coated retardation plate may be laminated by peeling and transferring from the substrate, and the substrate may be laminated as it is. It is also preferable that the substrate serves as a protective film, a retardation plate, or a transparent substrate for a flexible window.

In general, the shorter the wavelength, the larger the birefringence, and the longer the wavelength, the smaller the birefringence. In this case, since the λ/4 phase difference cannot be achieved in all visible light regions, the in-plane phase difference of λ/4 in the vicinity of 560 nm with high visibility is often designed to be 100 to 180 nm, preferably 130 to 150 nm. Contrary to usual, the use of an inverse dispersion λ/4 retardation plate made of a material having an inverse birefringence wavelength dispersion characteristic is preferable because visibility can be further improved. As such a material, it is preferable to use those described in Japanese Patent Application Laid-Open No. 2007-232873 or the like in the case of an elongated retardation plate and in Japanese Patent Application Laid-Open No. 2010-30979 in the case of a liquid crystal coated retardation plate.

As another method, a technique for obtaining a broadband λ/4 phase difference plate by combining with a λ/2 phase difference plate is also known (Japanese Laid-Open Patent Publication No. Hei 10-90521). The λ/2 retardation plate is also manufactured using the same material and method as the λ/4 retardation plate. Although the combination of the stretched retardation plate and the liquid crystal coated retardation plate is arbitrary, it is preferable to use a liquid crystal coated retardation plate for both, because the thickness can be reduced.

The circular polarizing plate is also known as a method of laminating a positive C plate to increase visibility in a diagonal direction (Japanese Patent Laid-Open No. 2014-224837). The positive C plate may be a liquid crystal coating type retardation plate or a stretch type retardation plate. The retardation in the thickness direction may be -200 to -20 nm, preferably -140 to -40 nm.

[Touch sensor]

The touch sensor is used as an input means. Various types of touch sensors, such as a resistive film type, a surface acoustic wave type, an infrared type, an electromagnetic induction type, and a capacitive type, are proposed, and any type may be used, but a capacitive type is particularly preferable. The capacitive touch sensor is divided into an active area and an inactive area located in an outer area of the active area. The active area is an area corresponding to an area (display unit) in which a screen is displayed on the display panel, an area in which a user's touch is sensed, and the inactive area is an area corresponding to an area (non-display unit) in which the display device screen is not displayed. The touch sensor may include a substrate having a flexible characteristic, a sensing pattern formed in the active region of the substrate, and a sensing line formed in the inactive region of the substrate, and connected to an external driving circuit through the sensing pattern and the pad part. have. As a substrate having flexible properties, the same material as the transparent substrate of the flexible window may be used. On the other hand, toughness is defined as the area under the curve from the stress-strain curve (%) obtained through the tensile test of a polymer material to the point of failure, and the touch sensor substrate is 2,000 It is preferable to have a toughness of MPa% or more from the viewpoint of suppressing cracking of the touch sensor. More preferably, the toughness may be 2,000 MPa% to 30,000 MPa%.

The sensing pattern may include a first pattern formed in a first direction and a second pattern formed in a second direction. The first pattern and the second pattern are arranged in different directions. Each pattern must be electrically connected in order to detect a touch point where the first pattern and the second pattern are formed on the same layer. In the first pattern, each unit pattern is connected to each other through a fitting, but since the second pattern has a structure in which each unit pattern is separated from each other in the form of an island, a separate bridge electrode is required to electrically connect the second pattern. need. As the sensing pattern, a known transparent electrode material may be applied. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), PEDOT (poly(3,4-ethylenedioxythiophene)) , Carbon nanotubes (CNTs), graphene, metal wires, and the like, and these may be used alone or in combination of two or more. Preferably, ITO can be used. The metal used for the metal wire is not particularly limited, and examples thereof include silver, gold, aluminum, copper, iron, nickel, titanium, telenium, and chromium. These can be used alone or in combination of two or more.

The bridge electrode may be formed on the insulating layer by interposing an insulating layer on the sensing pattern, a bridge electrode may be formed on a substrate, and an insulating layer and a sensing pattern may be formed thereon. The bridge electrode may be formed of the same material as the sensing pattern, or may be formed of a metal such as molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, or an alloy of two or more of them. Since the first pattern and the second pattern must be electrically insulated, an insulating layer is formed between the sensing pattern and the bridge electrode. The insulating layer may be formed only between the fitting of the first pattern and the bridge electrode, or may be formed in a layer structure covering the sensing pattern. In the latter case, the bridge electrode may connect the second pattern through a contact hole formed in the insulating layer. Optical between the substrate and the electrode as a means for appropriately compensating the difference in transmittance between the pattern region in which the sensing pattern is formed and the non-pattern region in which the pattern is not formed, especially the difference in light transmittance caused by the difference in the refractive index of this part. A control layer may be further included, and the optical control layer may be formed by coating a photocurable composition including a photocurable organic binder on a substrate. The photocurable composition may further include inorganic particles. The refractive index of the optical control layer may be increased by the inorganic particles.

The photocurable organic binder may include, for example, a copolymer of each monomer such as an acrylate-based monomer, a styrene-based monomer, and a carboxylic acid-based monomer. The photocurable organic binder may be, for example, a copolymer including different repeating units such as an epoxy group-containing repeating unit, an acrylate repeating unit, and a carboxylic acid repeating unit.

The inorganic particles may include, for example, zirconia particles, titania particles, alumina particles, and the like. The photocurable composition may further include additives such as a photopolymerization initiator, a polymerizable monomer, and a curing aid.

[Adhesive layer]

Each layer as the optical member (flexible window, circularly polarizing plate, touch sensor) and a film member constituting each layer (linear polarizing plate, λ/4 retardation plate, etc.), or an adhesive may be used when forming a laminate of optical members. . As adhesives, water-based adhesives, organic solvent-based adhesives, solvent-free adhesives, solid adhesives, water-based solvent volatilization adhesives, moisture curing adhesives, thermosetting adhesives, anaerobic curing adhesives, active energy ray curing adhesives, curing agent mixture adhesives, hot melt adhesives, pressure sensitive adhesives Adhesives (adhesives), rewet-type adhesives, pressure-sensitive adhesives, etc. can be used for general purpose. Among them, water-based solvent volatile adhesives, active energy ray-curable adhesives, and pressure-sensitive adhesives are often used. The thickness of the adhesive layer may be appropriately adjusted according to the required adhesion, etc., and may be 0.01 μm to 500 μm, preferably 0.1 μm to 300 μm, and may be present in plural in the laminate for the flexible image display device. The type of thickness may be the same or may be different.

As the water-based solvent volatile adhesive, a water-dispersed polymer resin polymer such as polyvinyl alcohol-based polymer, water-soluble polymer such as starch, ethylene-vinyl acetate emulsion, and styrene-butadiene-based emulsion may be used. In addition to water and the resin polymer, a crosslinking agent, a silane compound, an ionic compound, a crosslinking catalyst antioxidant, a dye, a pigment, an inorganic filler, an organic solvent, and the like may be blended. When bonding with the water-based solvent volatile adhesive, the water-based solvent volatile adhesive may be injected between the adherend layers, the adherend layers are bonded, and dried to impart adhesion. In the case of using the aqueous solvent volatile adhesive, the thickness of the adhesive layer may be 0.01 to 10 μm, preferably 0.1 to 1 μm. In the case of using multiple layers of the water-based solvent volatile adhesive, the types of the thickness of each layer may be the same or different.

The active energy ray-curable adhesive may be formed by curing an active energy ray-curable composition including a reactive material forming an adhesive layer by irradiating with an active energy ray. The active energy ray curing composition may contain at least one polymer of a radical polymerizable compound and a cationic polymerizable compound such as a hard coat composition. The radical polymerizable compound is the same as the hard coat composition, and the same type as the hard coat composition may be used. The radical polymerizable compound used in the adhesive layer is preferably a compound having an acryloyl group. It is also preferable to include a monofunctional compound in order to lower the viscosity as an adhesive composition.

The cationic polymerizable compound is the same as the hard coat composition, and the same type as the hard coat composition may be used. As the cationic polymerizable compound used in the active energy ray curing composition, an epoxy compound is particularly preferable. It is also preferable to include a monofunctional compound as a reaction diluent in order to lower the viscosity as an adhesive composition.

The active energy ray composition may further include a polymerization initiator. The above-described contents can be applied to the polymerization initiator.

The active energy ray curing composition may also include an ion scavenger, an antioxidant, a chain transfer agent, an adhesion imparting agent, a thermoplastic resin, a filler, a flow viscosity modifier, a plasticizer, an antifoaming agent, an additive, and a solvent. In the case of bonding with the active energy ray-curable adhesive, the active energy ray-curable composition is applied to one or both of the adhered layers and then bonded together to be bonded by irradiating active energy rays through one or both adhered layers. I can. When the active energy ray-curable adhesive is used, the thickness of the adhesive layer may be 0.01 to 20 µm, preferably 0.1 to 10 µm. In the case of using multiple layers of the active energy ray-curable adhesive, the types of the thickness of each layer may be the same or may be different from each other.

As the pressure-sensitive adhesive, any one classified as an acrylic pressure-sensitive adhesive, a urethane-based adhesive, a rubber adhesive, or a silicone adhesive depending on the resin polymer may be used. In addition to the resin polymer, the pressure-sensitive adhesive may contain a crosslinking agent, a silane compound, an ionic compound, a crosslinking catalyst, an antioxidant, a tackifier, a plasticizer, a dye, a pigment, an inorganic filler, or the like. Each component constituting the pressure-sensitive adhesive is dissolved and dispersed in a solvent to obtain a pressure-sensitive adhesive composition, and the pressure-sensitive adhesive composition is applied to a substrate and dried to form an adhesive layer. The adhesive layer may be formed directly or may be transferred to a separate substrate. It is also preferable to use a release film to cover the adhesive surface before bonding. When using the pressure-sensitive adhesive, the thickness of the adhesive layer may be 1 to 500 μm, preferably 2 to 300 μm. In the case of using multiple layers of the pressure-sensitive adhesive, the types of the thickness of each layer may be the same or different.

[Shading pattern]

The shading pattern may be applied as at least a part of the bezel or housing of the flexible image display device. When the light shielding pattern is included, the wiring disposed at the edge of the flexible image display device is hidden and is difficult to be recognized, so that visibility of the image may be improved. The shading pattern may be in the form of a single layer or a multiple layer. The color of the shading pattern is not particularly limited, and there are various colors such as black, white, and metallic colors. The shading pattern may be formed of a pigment for realizing color and a polymer such as acrylic resin, ester resin, epoxy resin, polyurethane, silicone, etc., and may be used alone or as a mixture of two or more. The shading pattern may be formed by various methods such as printing lithography and inkjet. The thickness of the shading pattern may be 1 μm to 100 μm, preferably 2 μm to 50 μm. It is also preferable to give a shape such as an inclination in the thickness direction of the light shielding pattern.

[Method of manufacturing optical laminate]

Another aspect of the present invention includes the steps of providing at least one optical member; Providing a flexible window on the optical member; Bonding the optical member and the flexible window; And cutting the bonded optical member and the flexible window at least once per cell unit, wherein the opposite end of the optical member has a most retracted end of the optical member from the end of the flexible window. It relates to a method for manufacturing an optical laminate that is cut to be positioned at a distance of less than 2.0 mm inward.

The above-described contents may be applied to the flexible window and the optical member.

If it is a method commonly used in the art for bonding by providing a flexible window on the optical member, it is not particularly limited in the present invention.

For example, the flexible window may be bonded to the optical member through an adhesive member, but is not limited thereto.

In another embodiment of the present invention, the optical member may be a polarizing layer or a touch sensor, but is not limited thereto.

The optical member and the flexible window bonded through the bonding step of the optical member and the flexible window are cut together at least once in cell units.

The cutting may be performed two or more times as necessary, but is not limited thereto. Specifically, the cutting can be cut using minimum energy to minimize the deformation of the cross-section. In the case of an optical laminate including a plurality of optical members, a plurality of cutting is performed using the minimum energy for each optical member. Can be done.

Referring to FIGS. 1 and 4, in the case of a conventional optical laminate, since the window and the optical member were individually cut and bonded together, the problem of reducing the aspect ratio according to the non-display area somewhat occurred. There was some problem of cracking.

However, in the method of manufacturing an optical laminate according to the present invention, referring to Figs. 2 and 5, since the bonded optical member and the flexible window are cut together, the non-display area can be reduced, so that the aspect ratio is excellent. It is possible to reduce the stress imbalance occurring in the cross-sectional deviation region of the optical member stacked together with the flexible window, thereby suppressing the problem of cracking at the end during bending, and thus has excellent bending durability.

Specifically, the opposite end of the cut optical member is provided at a position in which the most retracted end of the optical member is retracted inward from the end of the flexible window to a distance of less than 2.0 mm.

Preferably, the opposite end of the cut optical member is, the most protruding end of the optical member, and the most retracted end of the optical member outwardly from the end of the flexible window at a distance of 0.2 mm or less to inward. It may be provided in a retracted position with a distance of less than 2.0mm.

The method of manufacturing an optical laminate according to the present invention has an advantage of excellent bending performance because the cut end of the optical member is manufactured to form the same position from the end of the flexible window.

In another embodiment of the present invention, the number of optical members may be two or more.

When the optical member includes a base material and includes a polarizing layer and/or a touch sensor, the polarizing layer and/or a touch sensor may be provided closer to the flexible window.

In another embodiment of the present invention, the step of forming an adhesive member between the two or more optical members; may further include. However, the step of forming the adhesive member is preferably included before the step of bonding the bonded optical member and the flexible window in cell units.

The optical laminate manufactured by the method for manufacturing the optical laminate according to the present invention has excellent aspect ratio because it includes the step of cutting the flexible window and the optical member at the same time, and the optical member laminated with the flexible window is It is possible to reduce the stress imbalance that appears in the cross-sectional deviation region, thereby suppressing the occurrence of cracks at the ends, thereby having excellent bending durability.

[Wavelength range of laser light]

The wavelength of the laser light emitted from the laser device during the cutting process is 9 μm or more and 11 μm or less. In particular, laser light with wavelengths around 9.3㎛ (9.1 to 9.7㎛) and 10.6㎛ (10.1 to 11㎛) can be stably output when using the CO ₂ gas laser equipment as the laser equipment. Therefore, when laser light of such a wavelength is employed, the manufacturing method of the present invention can be carried out particularly well.

The cutting speed is preferably in the range of 100mm/s to 500mm/s, and the output is preferably 10 to 30% of the maximum output, and in this case, it is preferable because the cross section is clean while the film is cut. The number of times of irradiation is preferably performed once or twice, and may be performed multiple times if necessary for cutting the film.

[Image display device]

The image display device is not particularly limited, and may be composed of the above-described optical laminate and an organic EL display panel, and the optical laminate may be disposed on the viewing side of the organic EL display panel, and may be configured to be bent. The optical laminate may include a flexible window and at least one optical member provided under the flexible window, and specifically may include the aforementioned flexible window, a polarizing plate, and a touch sensor as the optical member. The stacking order of the flexible window, the polarizing plate, and the touch sensor may be applied to the above, but is not limited thereto.

Hereinafter, examples will be described in detail to describe the present specification in detail. However, the embodiments according to the present specification may be modified in various other forms, and the scope of the present specification is not construed as being limited to the embodiments described below. The embodiments of the present specification are provided to more completely describe the present specification to those of ordinary skill in the art. In addition, "%" and "parts" indicating content hereinafter are based on weight unless otherwise noted.

< In the examples Member used ( Materials used )>

Flexible window (Hereinafter abbreviated WIN)

Film with hard coat layer formed on both sides of base film: thickness 70㎛, elastic modulus 3457 MPa

Base film: 50㎛ thickness, polyimide-based (PI) resin film

Hard coat layer: A layer formed from a composition containing a dendrimer compound having a thickness of 10 μm and a polyfunctional acrylic group at the terminal

Polarizing plate (hereinafter abbreviated as POL )

TAC / polarizing layer / phase difference film laminated in order, thickness 　44.5㎛

TAC: thickness 25㎛, elastic modulus 3,282 MPa, Konica Minolta

Polarizing layer: thickness 2.5㎛, elastic modulus 937 MPa

Retardation film: 17㎛ thickness

Lamination structure of retardation film: Overcoat layer (cured layer of acrylic resin composition, thickness: 1 µm, elastic modulus 4,510 MPa) / adhesive layer (thickness: 5 µm, elastic modulus 0.11 MPa) / λ/ consisting of a layer cured of a liquid crystal compound and an alignment film 4 Phase difference plate (thickness: 3 µm, elastic modulus 1,624 MPa)/adhesive layer (thickness 5 µm, elastic modulus 0.11 MPa)/positive C plate (thickness 3 µm, elastic modulus 2,039 MPa) composed of a layer and alignment film cured with a liquid crystal compound

Touch sensor (Hereinafter abbreviated TS)

Touch sensor: thickness 33㎛, layer composition: touch sensor pattern (a laminated body that is a cured layer of ITO and acrylic resin composition, thickness 7㎛, elastic modulus 4,510 MPa) / adhesive layer (thickness 3㎛, elastic modulus 12,309MPa) / cyclic olefin coefficient Paper film (thickness 23㎛, elastic modulus 1,785 Mpa)

Adhesive member (Optically Clear Adhesive (hereinafter abbreviated) OCA ))

A methacrylic pressure-sensitive adhesive layer was used, and had a thickness of 25 μm, and was prepared by the following manufacturing method.

84 parts by weight of 2-ethylhexyl acrylate, 15 parts by weight of isobornyl acrylate, 1 part by weight of hydroxypropyl acrylate, and 0.02 parts by weight of 1-hydroxycyclohexylphenyl ketone as a polymerization initiator were mixed. The mixture was irradiated with ultraviolet rays to polymerize the monomer.

Thereafter, as a polymerization initiator, 0.4 parts by weight of 1-hydroxycyclohexyl phenylketone, 0.3 parts by weight of lauryl acrylate, 0.05 parts by weight of polyethylene glycol (200) diacrylate, 0.05 parts by weight of (3-glycidyloxypropyl) Trimethoxysilane was added to the mixture to prepare a pressure-sensitive adhesive composition.

The pressure-sensitive adhesive composition was coated on a polyethylene terephthalate film (release film) whose surface was treated with silicone. The coating thickness was set to 25 µm. Another release film was prepared and laminated on the coating. UV rays were irradiated to the laminate having the configuration of the release film / coating layer / release film layer of the adhesive composition. In the ultraviolet irradiation step, ultraviolet rays of 300 to 400 nm (the luminous intensity is maximized at 365 nm) were irradiated to the laminate so that the accumulated light amount was 1500 mJ/cm ² . In this way, a pressure-sensitive adhesive sheet including a (meth)acrylic pressure-sensitive adhesive layer was produced.

Polyimide resin film (hereinafter abbreviated as PI)

Polyimide resin film (PI), thickness 38㎛, elastic modulus 4,865MPa, Kolon (Korea)

Ink for shading pattern ( Colored layer Formation composition)

[Ink ingredient]

Acetylene Black　15% by weight

75% by weight polyester

Glutaric acid dimethyl ester 　2.5% by weight

Succinic acid　2 weight%

Isophorone 　5.5 wt%

[Hardening agent] aliphatic polyisocyanate 　75 wt%, ethyl acetate 25 wt%

[Solvent] 100% by weight of isophorone

[Manufacturing method] 　 A composition for forming a colored layer (black) was obtained by adding and mixing 10 parts by weight of a curing agent and 10 parts by weight of a solvent to 100 parts by weight of the ink component.

Cell form (cell shape)

Long rectangular shape with horizontal and vertical shape

Example One

A light-shielding pattern (non-display area) was formed on one side of the flexible window using ink for bezel (light-shielding pattern) so that the thickness after drying by a screen printing method was 3 μm.

Using OCA (thickness 25㎛) to contact the flexible window (thickness 70㎛) bezel (light-shielding pattern) surface, POL (thickness 70㎛), TS, PI substrates are sequentially bonded using a bonding machine. A laminate was prepared.

Using the optical layered body based on the edge of the bezel (light-shielding pattern) and using a CO ₂ laser cutter manufactured by LPTech (60W output) (hereinafter, referred to as a laser cutter), the incident wavelength was set to 9.3 μm, and the focus from the other side of the flexible window An optical laminate having a cross-sectional shape as shown in Table 1 by maintaining a distance of 38 mm (when condensing with a lens. The same hereinafter) and cutting based on a speed of 400 mm/s, output 30%, and one irradiation frequency ( Cell type) was prepared.

Example 2

After manufacturing the optical laminate in the same manner as in Example 1, the focal length was maintained at 42 mm using a laser cutter, and the first cutting was performed based on the speed of 400 mm/s, output 15%, and the number of irradiations once, and then focus An optical laminate (cell type) having a cross-sectional shape as shown in Table 1 was prepared by maintaining a distance of 38 mm and performing a second cutting based on a speed of 400 mm/s, an output of 30%, and the number of irradiations once.

Example 3

An optical laminate was manufactured in the same manner as in Example 1, except that the TS layer was not included. Using a laser cutter, a focal length of 42 mm, a speed of 400 mm/s, an output of 10%, and the number of irradiations were performed. After the first cutting, the focal length is maintained at 38 mm, and the second cutting is performed based on the speed of 400 mm/s, the output is 30%, and the number of irradiations is once. ) Was prepared.

Example 4

An optical laminate was manufactured in the same manner as in Example 1, except that the POL layer was not included, and based on a focal length of 42 mm, a speed of 400 mm/s, an output of 10%, and the number of irradiations once using a laser cutter. After the first cutting is performed, the focal length is maintained at 38 mm, and the second cutting is performed based on a speed of 400 mm/s, output 30%, and the number of irradiation times. Form) was prepared.

Example 5

After manufacturing the optical laminate in the same manner as in Example 1, the focal length was maintained at 42 mm using a laser cutter, and the first cutting was performed based on the speed of 400 mm/s, output 15%, and the number of irradiations once, and then focus An optical laminate (cell type) having a cross-sectional shape as shown in Table 1 was manufactured by maintaining a distance of 38 mm and performing the second cutting based on a speed of 400 mm/s, an output of 15%, and the number of irradiations once.

Example 6

After manufacturing the optical laminate in the same manner as in Example 1, the focal length was maintained at 42 mm using a laser cutter, and the first cutting was performed based on the speed of 400 mm/s, output 15%, and the number of irradiations once, and then focus An optical laminate (cell type) having a cross-sectional shape as shown in Table 1 was prepared by maintaining a distance of 38 mm and performing a second cutting based on a speed of 400 mm/s, an output of 25%, and the number of irradiations once.

Comparative example One

After fabricating a flexible window including a bezel (shielding pattern) in the same manner as in Example 1, cutting was performed in the same manner as in Example 1 to prepare a cell shape.

An optical laminate was fabricated using OCA in the order of OCA and POL/TS/PI, and cutting was performed in the same manner as in Example 1 so that each side was about 4 mm smaller than that of the flexible window.

The flexible window cell and the cut optical laminate were bonded to match the center and perpendicularity to prepare an optical laminate (cell form) having a cross-sectional shape as shown in Table 1.

Comparative example 2

In the same manner as in Example 1, a flexible window film including a bezel (shielding pattern) was produced, and then POLs were bonded using OCA.

The flexible window and the POL optical laminate were cut in the same manner as in Example 1 to prepare a cell shape.

An optical laminate to which the OCA and PI substrates were bonded was prepared, and cutting was performed in the same manner as in Example 1 so that each side was 4 mm smaller than that of the flexible window.

By bonding the flexible window and the optical laminate so that the center and the right angle were aligned, an optical laminate (cell form) having a cross-sectional shape as shown in Table 1 was manufactured.

Comparative example 3

Except for preparing a cell shape by cutting the flexible window and the TS optical laminate in the same manner as in Example 1, the same procedure as in Comparative Example 1 was performed, and the optical laminate having a cross-sectional shape as shown in Table 1 (cell Form) was prepared.

Experimental example

With respect to the samples prepared in Examples and Comparative Examples, the deviation of the end distance was confirmed using an optical microscope, and the flexural evaluation for this was performed in the following manner.

For the optical laminates obtained in each of the Examples and Comparative Examples, the durability against bending was confirmed using a bending evaluation facility (manufactured by Science Town, STS-VRT-500), and an evaluation test was performed.

6 is a diagram schematically showing this evaluation test method. As shown in Fig. 6, two stages 201 and 202 that can be moved individually are arranged so that the gap C is 5.0 mm (2.5R), and the optical laminate according to the embodiment and the comparative example is taped so that the center of the gap C is located in the width direction. It was fixed and placed (Figs. 7A and 7B). At this time, if the front side becomes a flexible window, it is IN folding, and when the rear side becomes a flexible window, it becomes OUT folding. For example, FIGS. 7A and 7B may be understood as fixing and arranging the optical laminates according to FIGS. 4 and 5 with a tape so as to meet the standards, respectively. Then, the two mounting tables 201 and 202 were rotated 90 degrees upward to the center of the rotation axis at the positions P1 and P2, and a bending force was applied to the region of the optical laminate 100 corresponding to the gap C of the stage. After that, the two stages 201,202 were put back in place. After the above series of operations were completed, the number of times the bending force was applied was determined once. The number of times of addition of the bending force was accumulated and it was checked whether bubbles or cracks occurred in the region of the end size deviation from the flexible window of the optical laminate corresponding to the gap C of the stages 201 and 202 (X in FIGS. 7A and 7B), At the time when air bubbles or cracks occurred, the evaluation of the bending was stopped and the evaluation results were shown in Table 1 by evaluating according to the following criteria. The moving speeds of the stages 201 and 202 and the degree of addition of the bending force were the same conditions in the evaluation tests for all optical laminates.

At this time, the criterion for evaluating flexibility is as follows.

◎： Over 200,000 times

○: More than 150,000 times and less than 200,000 times

△: More than 100,000 times and less than 150,000 times

×: More than 50,000 times and less than 100,000 times

××: Less than 50,000 times

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 Comparative Example 3 Configuration of optical laminate Fig. 8a Fig. 8b Fig. 8c Figure 8d Fig. 8e Fig. 8b Fig. 9a Fig. 9b Fig. 9c Distance between ends
(Mm) WIN and POL (A) 0.1
(Inside) 1.2
(Inside) 0.1
(Inside) - 0.1
(Inside) 1.9
(Inside) 2.1
(Inside) 0.1
(Inside) - WIN and TS (B) 0.2
(Inside) 1.1
(Inside) - 0.1
(Inside) 0.2
(Inside) 1.1
(Inside) 2.2
(Inside) - 0.0 WIN and PI (C) 0.2 (inner) 0.9
(Inside) 1.0
(Inside) 1.0
(Inside) 0.2
(Outside) 0.9
(Inner( 1.9
(Inside) 2.0
(Inside) 2.1
(Inside) Flexibility
(2.5R) IN Folding ◎ ○ ◎ ◎ ◎ ○ ×× ×× ×× OUT Folding ◎ △ ○ ○ ◎ △ ×× × ××

Referring to Table 1 above, it can be seen that the distance (deviation) between the ends of the flexible window and the lower optical member has an effect on the bending performance. Among the optical laminates according to the present invention, the smaller the end distance, the better the bending performance. It can be seen that this is expressed.

100: optical laminate
10: flexible window
20: optical member
21: polarizing plate (POL)
22: touch sensor (TS)
23: substrate (PI)
30: adhesive member
40: non-display area
X: location of crack, bubble or crack
201, 202: stage

Claims (4)

Flexible windows; And
Including; at least one optical member provided under the flexible window;
Opposing ends of the optical member,
The most retracted end of the optical member is located at a distance of less than 2.0 mm inward from the end of the flexible window,
Optical laminate. The method of claim 1,
The optical laminated body wherein the most protruding end and the most retracted end of the optical member are located at a distance of 0.2 mm or less to the outside from the end of the fusible window to an inner distance of less than 2.0 mm. Providing at least one optical member;
Providing a flexible window on the optical member;
Bonding the optical member and the flexible window; And
Including; cutting the bonded optical member and the flexible window at least once per cell unit,
Opposing ends of the optical member,
The most retracted end of the optical member is cut to be located at a distance of less than 2.0 mm inward from the end of the flexible window,
Optical laminate manufacturing method. The method of claim 3,
The optical laminated body wherein the most protruding end and the most retracted end of the optical member are located at a distance of 0.2 mm or less to the outside from the end of the fusible window to an inner distance of less than 2.0 mm.

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