TW202105016A - Optical laminate and method for manufacturing same - Google Patents

Abstract

An optical laminate according to the present invention is characterized by including a flexible front surface plate and one or more optical members provided below the flexible front surface plate, wherein among the facing end sections of the optical members, the most retreated end section of the optical member is positioned inward at a distance of less than 2.0 mm from an end section of the flexible front surface plate.

Description

Optical laminate and manufacturing method thereof

The present invention relates to an optical laminate and a manufacturing method thereof.

In recent years, input devices combining various display devices such as liquid crystal display devices (Liquid Crystal Display (LCD)) and touch panels have been widely used. For example, mobile devices such as smart phones or tablets are provided with touch panels.

In order to protect the display panel from scratches or external impact, display devices such as such display devices and input devices include a glass front panel on the display panel to protect the display, usually, such as touch Optical members such as panels and polarizing plates exist in a form in which an adhesive is used to be laminated with a size smaller than the front plate.

On the other hand, flexible displays are rapidly emerging as the next-generation display devices. The flexible displays use flexible materials such as plastic to replace the existing glass that has no flexibility and is even paper-like. The display performance can be maintained as it is by bending.

In order to apply to such a flexible display, attempts have been made to change the glass front panel to a flexible front panel. However, in the case of a form in which an adhesive layered optical member is used in a size smaller than the flexible front panel, the flexible front panel The exposed part of the panel induces damage during bending, which sometimes causes a problem that the bending performance is somewhat reduced. In addition, the non-display area due to the deviation of the size of the flexible front panel and the optical member may cause the screen ratio to be somewhat lost. problem.

Korean Patent Publication No. 2015-0092777 relates to a display device and a manufacturing method of the display device, and discloses content related to the following display device. The display device includes: a display panel, including a lower substrate, arranged in the lower portion The switching element on the substrate, the light-emitting structure arranged on the switching element, the sealing portion arranged on the light-emitting structure, the display area, and the peripheral area surrounding the display area; and then the component is arranged on the display On the panel; transparent member arranged on the bonding member; shading member arranged on the bottom surface of the transparent member in the peripheral area; phase retardation layer arranged between the display panel and the bonding member And a linear polarizing layer, which is disposed between the adhesive member and the transparent member and partially overlaps the light-shielding member.

However, the actual situation is that the prior art like the document still has a large non-display area and causes a loss of screen ratio, and it is impossible to propose an alternative to the bending performance. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Korean Patent Publication No. 2015-0092777 (2015.08.17.)

[The problem to be solved by the invention] The present invention intends to provide an optical laminated body, which improves the screen ratio by reducing the unnecessary shielding area and has excellent bending performance.

Furthermore, the present invention intends to provide a method of manufacturing an optical laminate that can reduce unnecessary shielding areas and can suppress the occurrence of cracks during bending evaluation. [Means to solve the problem]

The present invention provides an optical laminate, including: a flexible front panel, and at least one optical member existing in a lower portion of the flexible front panel, and in the opposing ends of the optical member, the optical The last retracted end of the member is located at a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

Furthermore, the present invention provides a method of manufacturing an optical laminate, including: a stage of providing at least one optical member; a stage of providing a flexible front panel on the optical member; and combining the optical member with the flexible The stage of bonding the optical front panel; and the stage of cutting the bonded optical member and the flexible front panel more than once in units of units, and the optical member is at the opposing end of the optical member. The last retracted end of the member is cut so that the distance inward from the end of the flexible front panel is less than 2.0 mm. [Effects of the invention]

The optical laminate of the present invention has the advantages of wide screen ratio and excellent bending performance. Furthermore, the manufacturing method of the optical laminated body of this invention has the advantage of being able to reduce a non-display area, and can suppress the generation of cracks at the time of bending evaluation.

Hereinafter, the present invention will be explained in more detail. In the present invention, the so-called "above" a certain component is not only a case where a certain component is directly connected to another component, but also a case where another component is interposed between the two components. In the present invention, the so-called "including" a certain component in a certain part, unless otherwise specified, does not mean that other components are excluded, but it means that other components may be further included.

[Flexible front panel] More specifically, the flexible front panel of the present invention will be explained.

The flexible front panel is a flexible front panel, and the "flexible front panel" can be mixed with the "flexible front panel". The flexible front panel may include a hard coating on at least one side of the flexible transparent substrate. The flexible front panel is not rigid or stiff like existing glass, but includes a transparent substrate with flexible characteristics and at least one-sided transparent substrate The hard coat layer thereby plays a role of protecting the other components of the image display device, which are the components, from external impact or changes in ambient temperature and humidity.

The thickness of the hard coat layer of the flexible front panel is not particularly limited, and may be, for example, 2 μm to 100 μm. When the thickness of the hard coat layer is less than 2 μm, it is difficult to ensure sufficient impact resistance, and when it exceeds 100 μm, the bending resistance is reduced, and the problem of curling due to hardening shrinkage may occur.

The hard coat layer may be formed by hardening a hard coat composition containing a reactive material that forms a cross-linked structure by irradiating light or thermal energy.

The hard coat layer may be formed by hardening a hard coat composition, the hard coat composition containing both a photo-curing (meth)acrylate monomer or oligomer, and a photo-curing epoxy monomer or The oligomer is not limited to this.

In addition, the flexible front panel may include polyimide, polyimide amide, and polyethylene terephthalate film materials. In this case, although it is soft, it has excellent hardness and is preferable, but it is not Limited to this.

The flexible front panel can be directly manufactured as described above, or commercially available films can also be purchased for application.

In an embodiment of the present invention, the thickness of the flexible front panel may be 5 μm to 200 μm, preferably 20 μm to 100 μm, and more preferably 30 μm to 80 μm. In this case, the thickness of the flexible front panel may be 5 μm to 200 μm. It is better to maintain the hardness and ensure the flexibility with the proper thickness.

[End of optical member] The optical laminate of the present invention includes at least one optical member existing in the lower portion of the flexible front panel. In this case, among the opposing ends of the optical member, the most retracted end of the optical member It is located at a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm, preferably 1.2 mm or less, more preferably 1.0 mm or less, and most preferably 0.03 mm or less.

In the present invention, the "end portion" refers to the end portion of the flexible front panel and the optical member, and the "opposing end portion" refers to the "end portions" facing each other. Specifically, the positional relationship of the optical members included in the laminated body depends on the position of the end of the laminated body. For example, when cutting in the direction orthogonal to the stacking direction as shown in FIG. 2, if the end portion is viewed in detail, it can be shown as shown in FIGS. 8( a) to 9 (c ). Specifically, when the imaginary line orthogonal to the stacking direction is set as the reference line from the end of the cut flexible front panel and is indicated by a broken line, the position of the end of the remaining optical member is separated from The distance of the dashed line (indicated by the arrow) leaves. In this way, by measuring the distance in the direction along the plane direction between the end of the cut flexible front panel and the end of the other optical member, the end of the flexible front panel and the optical member can be determined The distance between the ends.

In addition, the so-called end of the optical member of the present invention is located at a position where the distance inward from the end of the flexible front panel is less than 2.0 mm, and the result means that the end of the optical member is from the front of the flexible front panel. When the end of the panel retreats within the range, the distance between the end of the optical member and the end of the flexible front panel is less than 2.0 mm at most.

At this time, more specifically, the distance refers to the shortest length between the surface including the end of the flexible front panel and the surface including the end of each optical member whose distance is 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 front panel. The position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

The so-called end of the optical member of the present invention is located at a distance of 0.2 mm or less from the end of the flexible front panel to the outside, which means that the end of the optical member is separated from the flexible front panel. When the end portion protrudes within the range, the distance between the end portion of the optical member and the end portion of the flexible front panel is at most 0.2 mm.

In addition, in the present invention, the "optical member" refers to "all optical members" included in the optical laminate. For example, the optical laminate in the present invention includes a flexible front panel and a lower part thereof. When a three-layer optical member including a polarizing plate, a touch sensor, and a base material is included, any one of the polarizing plate, touch sensor, and base material is: among all opposing ends of each end, The last retracted end exists at a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

When the optical laminate of the present invention includes a flexible front panel, and an optical member comprising three layers of a polarizing plate, a touch sensor, and a substrate under the flexible front panel, the polarizing plate and the touch sensor are preferably used. Either of the device and the base material: among all the opposing ends of each end, the last retreat can exist at a distance of 0.2 mm or less from the end of the flexible front panel to the outside From the position of the flexible front panel to a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm. When the optical laminate of the present invention includes a flexible front panel, and a lower part of the optical member including three layers of a polarizing plate, a touch sensor, and a substrate, it is more preferably the polarizing plate, touch sensor Any one of the device and the base material is: among all the opposite ends of each end, the end that can be retreated last exists in the distance from the end of the flexible front panel to the inner side of less than 2.0 mm position.

Among all the opposing ends of the surface constituting the optical member, the most protruding end and the last retracted end may also be located at a distance of 0.2 mm or less to the outside from the flexible front panel, preferably 0.15 mm or less, more preferably 0.02 mm or less, to a position where the distance to the inside from the flexible front panel is less than 2.0 mm, 1.2 mm or less, preferably 1.0 mm or less, more preferably 0.03 mm or less, but It is not limited to this. Among them, it is preferable that all facing ends that are parallel to the bending direction satisfy the above-mentioned condition.

In the optical laminate of the present invention, since the end of the optical member is located within the range from the end of the flexible front panel, it has the advantages of reducing the non-display area and expanding the screen ratio.

In addition, in the bending evaluation, the phenomenon of cracks at the end can be suppressed, which has the advantage of excellent bendability.

That is, the optical laminate of the present invention may have a recessed portion less than 2.0 mm based on the end of the flexible front panel. In addition, the optical laminate of the present invention may have a protruding part of 0.2 mm or less based on the end of the flexible front panel.

The optical layered body of the present invention may further include a transparent substrate. In this case, the end of the transparent substrate is located at a position where the distance inward from the end of the flexible front panel is less than 2.0 mm. In addition, the end of the transparent base material may be located at a distance of 0.2 mm or less from the end of the flexible front panel to the outside to a position at the inside from the end of the flexible front panel. Locations where the distance is less than 2.0 mm.

When there are two or more transparent substrates, the most retracted end of the transparent substrate is located at a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm. The transparent substrate may be a flexible transparent substrate, and the content described later may be applied.

The transparent substrate may be included in each optical member described later, or may be included in an optical laminate different from the optical member.

More preferably, when there are two or more transparent substrates, the most protruding end and the last retracted end of the transparent substrate may be located at a distance from the end of the flexible front panel to the outside From a position below 0.2 mm to a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

[Transparent substrate] The transparent substrate may refer to a substrate with a visible light transmittance of 70% or more or 80% or more. If the transparent substrate is a polymer film with transparency, it can be used. Specifically, it may be a film formed from a polymer such as a cycloolefin derivative, cellulose ( Diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl cellulose, propionyl cellulose, butyryl cellulose, acetyl propyl cellulose) ethylene -Vinyl acetate copolymer, polycyclic olefin, polyester, polystyrene, polyamide, polyetherimide, polyacrylic acid, polyimide, polyimide imine, polyether ether, polyetherimide , Polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polymethyl methacrylate, poly Ethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyurethane, epoxy, etc., unstretched film, uniaxially stretched film can be used Or biaxially stretched film.

These polymers can be used individually or in combination of two or more. Among the transparent substrates described above, it is preferable to use a polyamide film, a polyimide film or a polyimide film, a polyester film, an olefin film, which are excellent in transparency and heat resistance, Acrylic film, cellulose film. In the polymer film, a film in which inorganic particles such as silicon dioxide, organic fine particles, rubber particles, etc. are dispersed is also preferable. Furthermore, it may also contain coloring agents such as pigments or dyes, fluorescent whitening agents, dispersants, plasticizers, heat stabilizers, light stabilizers, infrared absorbers, ultraviolet absorbers, antistatic agents, antioxidants, Blending agents such as lubricants. The thickness of the substrate may be 5 μm to 200 μm, preferably 20 μm to 100 μm.

[Non-display area] In another embodiment of the present invention, the optical laminate includes a non-display area defined as the periphery of the optical laminate, and the width of the non-display area may be 15 mm or less, preferably 10 mm or less, More preferably, it is 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” refers to a portion covered by the frame portion of the display device main body (FIG. 3 ), and refers to an area where no image can be seen. In addition, the "non-display area" can be mixed with the "masked area".

The optical laminate of the present invention includes the flexible front panel in the outermost contour portion. In this case, among the various optical members, base materials, etc. located at the lower portion of the flexible front panel, the end of the optical member that is retracted last The part is located at a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

More preferably, among the various optical members, substrates, etc. located at the lower portion of the flexible front panel, the most protruding end and the end of the last retracted optical member may be located from the end of the flexible front panel The position where the distance from the outside is 0.2 mm or less to the position where the distance from the end of the flexible front panel to the inside is less than 2.0 mm.

Usually, the outer contour of the display area is surrounded by the non-display area. When the non-display area is wide, the screen ratio sometimes decreases. However, in the optical laminate of the present invention, the width of the non-display area is narrower than before, and it is reduced to less than 2.0 mm on the opposite sides, and there is no need The masked area of the SR is reduced, which has the advantage of improving the aspect ratio.

In the present invention, the "aspect ratio" refers to the "display area/(display area + non-display area)", and the "screen ratio" refers to the ratio between the horizontal and vertical of the display area. That is, the larger the display area, the larger the aspect ratio, and the smaller the non-display area, the larger the aspect ratio.

In addition, the optical layered body of the present invention can suppress the occurrence of cracks at the ends during bending evaluation, and has an advantage of excellent bending durability.

[Optical components] The optical laminate of the present invention includes the flexible front panel and at least one or more optical members present in the lower portion of the flexible front panel.

The optical member is located on the upper part of the display panel, and can be a polarizer or a touch sensor, and can provide protection of the display panel, improved visibility, user input functions, etc., respectively. Specifically, the optical member may include more than one selected from the group consisting of a polarizer and a touch sensor.

The optical member may be a laminate including at least one of the polarizing plate and the touch sensor according to the required function. As an example of the order of the laminate, the flexible front panel and the polarizing plate may be arranged from the visible side. , Touch sensor, or flexible front panel, touch sensor, and polarizer in the order of stacking. At this time, if the polarizing plate is on the visibility side of the touch sensor, it is difficult to see the pattern of the touch sensor, and the visibility of the displayed image can be improved, so it is better. When it is comprised by the said laminated body, each member can be laminated|stacked using an adhesive layer etc.. In addition, for the purpose of shielding, a light shielding pattern may be formed on at least one side of one layer of the flexible front panel, the polarizing plate, and the touch sensor, so that the wiring of the display panel and the like are not visible.

[Polarizer] The polarizing plate may be a single polarizing layer or a structure including a polarizing layer and a transparent substrate attached to at least one side thereof, and is divided into linear polarizing plates according to the polarization state of the light emitted through the polarizing plate, Circular polarizer, etc. Hereinafter, in this description, there is no particular limitation, and a circular polarizing plate that can be used when absorbing reflected light to improve visibility will be specifically described.

The circular polarizing plate is a functional layer having a function of laminating a λ/4 phase difference plate on a linear polarizing plate to transmit only the circularly polarized light component on the right side or the left side. For example, it can be used for the following purposes: to convert external light into right circularly polarized light, block the external light reflected by the organic electroluminescence (EL) panel and become the left circularly polarized light, so that only the light-emitting components of organic EL Through this, the influence of reflected light is suppressed and the image can be easily seen. In order to achieve the function of circular polarization, the absorption axis of the linear polarizer and the retardation phase axis of the λ/4 retardation plate must theoretically be 45°, but in practice they are 45°±10°. The linear polarizing plate and the λ/4 retardation plate do not necessarily need to be laminated adjacently, as long as the relationship between the absorption axis and the retardation phase axis satisfies the above-mentioned range. It is preferable to achieve complete circular polarization in the full wavelength, but this is not necessarily required in practice. Therefore, the circular polarization plate of the present invention may also include an elliptical polarization plate. It is also preferable to laminate a λ/4 retardation film closer to the visibility side of the linear polarizing plate to make the emitted light circularly polarized, thereby improving the visibility in the state of wearing polarized sunglasses.

The linear polarizer is a functional layer that has a function of passing light that vibrates in the direction of the transmission axis, but blocking the polarization of the vibration component perpendicular to it. The linear polarizing plate may be a single linear polarizing layer, or a structure including a linear polarizing layer and a protective film attached to at least one side of the linear polarizing layer. As the protective film, those exemplified as the transparent substrate can be used. The thickness of the linear polarizer may be 200 μm or less, preferably 0.5 μm to 100 μm. If the thickness exceeds 200 μm, flexibility may decrease.

The linear polarizing layer may be a film-type polarizing layer manufactured by dyeing and stretching a polyvinyl alcohol (PVA) film. By adsorbing a dichroic dye such as iodine to the PVA-based film aligned by stretching or stretching while being adsorbed on the PVA-based film, the dichroic dye is aligned to exhibit polarization performance. In the production of the film-type polarizing layer, other steps such as swelling, cross-linking based on boric acid, washing based on aqueous solution, and drying may also be included. The steps of stretching and dyeing may be performed on the PVA-based film alone, or may be performed in the state of being laminated with other films such as polyethylene terephthalate. As the PVA-based film used, the thickness is preferably 10 μm to 100 μm, and the stretching ratio is preferably 2 times to 10 times.

In addition, as another example of the above-mentioned polarizing layer, a liquid crystal coating type polarizing layer formed by applying a liquid crystal polarizing composition may also be used. The liquid crystal polarizing composition may include a liquid crystal compound and a dichroic dye compound. As the liquid crystal compound, it is sufficient as long as it has the property of exhibiting a liquid crystal state. In particular, a compound having a high-order alignment state such as a smectic order can exhibit high polarization performance, and therefore is preferable. In addition, it is also preferable to have a polymerizable functional group. The dichroic dye compound is a dye that is aligned with the liquid crystal compound to exhibit dichroism, and the dichroic dye itself may have liquid crystallinity and may have a polymerizable functional group. A compound in the liquid crystal polarizing composition has a polymerizable functional group, and the liquid crystal polarizing composition may further include an initiator, a solvent, a dispersant, a leveling agent, a stabilizer, a surfactant, a crosslinking agent, and a silane coupling agent Wait. The liquid crystal coating type polarizing layer can be manufactured by coating a liquid crystal polarizing composition on an alignment film to form a liquid crystal polarizing layer. The liquid crystal coating type polarizing layer can be made thinner than the film type polarizing layer. The thickness of the liquid crystal coating type polarizing layer may be 0.5 μm to 10 μm, preferably 1 μm to 5 μm.

The alignment film can be produced by, for example, coating an alignment film forming composition on a substrate and imparting alignment properties by rubbing, polarized light irradiation, or the like. The alignment film forming composition includes an alignment agent, and may also include a solvent, a crosslinking agent, an initiator, a dispersant, a leveling agent, a silane coupling agent, and the like. As the alignment agent, for example, polyvinyl alcohol, polyacrylates, polyamides, and polyimines can be used. When applying optical alignment, it is preferable to use an alignment agent containing a cinnamate group. The weight average molecular weight of the polymer used as the alignment agent may be about 10,000 to 1,000,000. The thickness of the alignment film is preferably 5 nm to 10,000 nm, especially if it is 10 nm to 500 nm, the alignment restriction force is fully exhibited, so it is preferable. The liquid crystal polarizing layer can be peeled from the substrate and laminated after transfer, or the substrate can be laminated directly. The substrate also preferably functions as a transparent substrate for a protective film, a retardation plate, or a flexible front panel.

The protective film may be a transparent polymer film, and materials and additives used for the transparent substrate can be used. The content can be applied to the transparent substrate. The λ/4 retardation plate is a film that provides a λ/4 retardation in a direction (in-plane direction of the film) orthogonal to the traveling direction of incident light. The λ/4 retardation plate may be a stretched retardation plate manufactured by stretching a polymer film such as a cellulose-based film, an olefin-based film, or a polycarbonate-based film. If necessary, it may contain retardation adjusters, plasticizers, ultraviolet absorbers, infrared absorbers, coloring agents such as pigments and dyes, fluorescent whitening agents, dispersants, heat stabilizers, light stabilizers, and antistatic agents , Antioxidants, lubricants, solvents, etc. The thickness of the extended phase difference plate may be 200 μm or less, preferably 1 μm to 100 μm. If the thickness exceeds 200 μm, flexibility may decrease.

In addition, as another example of the λ/4 retardation plate, a liquid crystal coating type retardation plate formed by coating a liquid crystal composition may also be used. The liquid crystal composition includes a liquid crystal compound having the property of showing a liquid crystal state such as a nematic type, a cholesteric type, and a smectic type. One compound including the liquid crystal compound in the liquid crystal composition has a polymerizable functional group. In addition, the liquid crystal coating type retardation plate may further include a starter, 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 applying a liquid crystal composition to an alignment film and curing the same as described in the liquid crystal polarizing layer. The liquid crystal coating type retardation plate can be made thinner than the extension type retardation plate. The thickness of the liquid crystal retardation layer may be 0.5 μm to 10 μm, preferably 1 μm to 5 μm. The liquid crystal coating type retardation plate can be peeled from the substrate and laminated after transfer, or the substrate can be laminated directly. The substrate also preferably functions as a transparent substrate for a protective film, a retardation plate, or a flexible front panel.

Generally, the shorter the wavelength, the greater the birefringence, and the longer the wavelength, the greater the birefringence. In this case, since the phase difference of λ/4 cannot be achieved in the entire visible light region, in most cases, the in-plane phase difference is designed to be 100 nm to 180 nm, preferably 130 nm to 150 nm, in order to compare The wavelength near 560 nm, which has a high visual sensitivity, is λ/4. Contrary to the usual situation, the use of the reverse dispersion λ/4 retardation plate can further improve the visibility. Therefore, it is preferable that the reverse dispersion λ/4 retardation plate uses a material with opposite birefringence and wavelength dispersion characteristics. As such a material, when it is an extension type retardation plate, it is also preferable to use the material described in Japanese Laid-Open Patent No. 2007-232873, etc., and when it is a liquid crystal coating type retardation plate, it is also preferably The materials described in Japanese Laid-open Patent No. 2010-30979 were used.

In addition, as another method, a technique of combining with a λ/2 phase difference plate to obtain a wide-band λ/4 phase difference plate is also known (Japanese Laid-Open Patent Publication No. 10-90521). The λ/2 retardation plate can also be manufactured using the same material and method as the λ/4 retardation plate. The combination of the extension type retardation plate and the liquid crystal coating type retardation plate is arbitrary, and it is preferable to use both of the liquid crystal coating type retardation plates in terms of making the thickness thin.

Regarding the circularly polarizing plate, in order to improve the visibility in the oblique direction, a method of laminating positive C plates is also known (Japanese Laid-open Patent No. 2014-224837). The positive C plate can be a liquid crystal coating type retardation plate or an extended type retardation plate. The phase difference in the thickness direction may be -200 nm to -20 nm, preferably -140 nm to -40 nm.

[Touch Sensor] The touch sensor is used as an input component. As a touch sensor, various forms such as a resistive film method, a surface elastic wave method, an infrared method, an electromagnetic induction method, and an electrostatic capacitance method have been proposed. Any method may be used, and an electrostatic capacitance method is particularly preferred. In the capacitive touch sensor, it is divided into an active area and an inactive area located in the outer contour zone of the active area. The active area is the area corresponding to the area (display part) where the screen is displayed on the display panel, and is the area that perceives the user's touch, and the inactive area is the area corresponding to the area where the screen is not displayed (non-display part) in the display device . The touch sensor may include: a substrate with soft characteristics; a sensing pattern formed on the active area of the substrate; and each sensing line formed on the inactive area of the substrate and used to pass through the sensing pattern and the pad Part and connected with an external drive circuit. As the substrate with flexible properties, the same material as the transparent base material of the flexible front panel can be used. On the other hand, toughness is defined by the area of the lower part of the curve before the failure point based on the stress-strain curve obtained by the tensile test of polymer materials. In terms of suppressing cracks in the touch sensor, the touch sensor substrate preferably has a toughness of 2,000 MPa% or more. 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. In order for the first pattern and the second pattern to sense the touched location formed on the same layer, the patterns must be electrically connected. The first pattern is a form in which the unit patterns are connected to each other by fitting, but the second pattern is a structure in which the unit patterns are separated from each other into an island form. Therefore, in order to electrically connect the second patterns, another bridge electrode is required. The sensing pattern can use well-known transparent electrode raw materials. For example, indium tin oxide (Indium Tin Oxide, ITO), indium zinc oxide (Indium Zinc Oxide, IZO), zinc oxide (ZnO), indium zinc tin oxide (Indium Zinc Tin Oxide, IZTO), Cadmium Tin Oxide (CTO), PEDOT (poly(3,4-ethylenedioxythiophene)), Carbon Nanotube (CNT) , Graphene, metal wire, etc., these can be used alone or in a mixture of two or more. Preferably, ITO can be used. The metal used in the metal wire is not particularly limited, and examples thereof include silver, gold, aluminum, copper, iron, nickel, titanium, tellurium, and chromium. These can be used alone or in combination of two or more.

The bridge electrode can be formed on the upper part of the insulating layer by insulating the edge layer on the upper part of the sensing pattern, or the bridge electrode can be formed on the substrate, and the insulating layer and the sensing pattern can be formed thereon. The bridge electrode may also be formed of the same material as the sensing pattern, or may be formed of metals such as molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, or an alloy of two or more of these. 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 can also be formed only between the fitting of the first pattern and the bridge electrode, or it can be formed with a structure covering the sensing pattern. In the latter case, the bridge electrode may be connected to the second pattern via a contact hole formed in the insulating layer. As a means for appropriately compensating for the difference in transmittance between the patterned area where the sensing pattern is formed and the non-patterned area where no pattern is formed, especially the difference in light transmittance induced by the difference in the refractive index of this part The method may further include an optical adjustment layer between the substrate and the electrode, and the optical adjustment layer may be formed by coating a photocuring composition containing a photocuring organic adhesive on the substrate. The photocurable composition may further include inorganic particles. With the inorganic particles, the refractive index of the optical adjustment layer can be increased.

The photocurable organic binder may include, for example, copolymers of monomers such as acrylic monomers, styrene monomers, and carboxylic acid monomers. The photocurable organic binder may be, for example, a copolymer containing repeating units that are different from each other, such as an epoxy group-containing repeating unit, an acrylate repeating unit, a carboxylic acid repeating unit, and the like.

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

[Adhesive layer] It is used to constitute each layer (flexible front panel, circular polarizer, touch sensor) as the optical member and the film member (linear polarizer, λ/4 phase difference plate, etc.) constituting each layer, or optical member In the case of a laminate, an adhesive can be used. As the adhesive, water-based adhesives, organic solvent-based adhesives, solvent-free adhesives, solid adhesives, water-based solvent volatile adhesives, moisture curing adhesives, thermosetting adhesives, and anaerobic curing adhesives can be used. General-purpose substances such as adhesives, active energy ray hardening adhesives, hardening mixed adhesives, hot-melt adhesives, pressure-sensitive adhesives (adhesives), rewetting adhesives, and adhesives. Among them, water-based solvent volatile adhesives, active energy ray hardening type adhesives, and adhesives are often used. The thickness of the adhesive layer can be appropriately adjusted according to the required adhesive force, etc., and can be 0.01 μm to 500 μm, preferably 0.1 μm to 300 μm. There may be multiple laminates for the flexible image display device. The respective thicknesses or types may be the same or different.

As the water-based solvent volatile adhesive, water-dispersed polymers such as polyvinyl alcohol-based polymers, starch and other water-soluble polymers, ethylene-vinyl acetate emulsions, styrene-butadiene-based emulsions, and the like can be used. Resin polymer. In addition to mixing water and the resin polymer, crosslinking agents, silane-based compounds, ionic compounds, crosslinking catalysts, antioxidants, dyes, pigments, inorganic fillers, organic solvents, etc. can also be formulated. When the water-based solvent volatile adhesive is used for bonding, the water-based solvent volatile adhesive can be provided by injecting the water-based solvent volatile adhesive between the layers to be bonded, bonding the bonded layers, and then drying them. The thickness of the adhesive layer when the water-based solvent volatile adhesive is used may be 0.01 μm to 10 μm, preferably 0.1 μm to 1 μm. When multiple layers of the water-based solvent volatile adhesive are used, the thickness or type of each layer may be the same or different.

The active energy ray curable adhesive can be formed by curing an active energy ray curable composition that includes a reactive substance that forms an adhesive layer by irradiating an active energy ray. The active energy ray hardening composition may contain at least one polymer of a radical polymerizable compound and a cationic polymerizable compound like a hard coat composition. The radically polymerizable compound is the same as the hard coat composition, and the same kind as the hard coat composition can be used. The radically polymerizable compound used in the adhesive layer is preferably a compound having an acryl group. In order to reduce the viscosity of the adhesive composition, it is also preferable to include a monofunctional compound.

The cationically polymerizable compound is the same as the hard coat composition, and the same kind as the hard coat composition can be used. As the cationic polymerizable compound used in the active energy ray hardening composition, an epoxy compound is particularly preferred. In order to reduce the viscosity of the adhesive composition, it is also preferable to include a monofunctional compound as a reactive diluent.

The active energy ray composition may further include a polymerization initiator. The polymerization initiator can be applied to the content.

The active energy ray hardening composition may further include ion scavengers, antioxidants, chain transfer agents, adhesion imparting agents, thermoplastic resins, fillers, flow viscosity modifiers, plasticizers, defoamers, additives, and solvents. When the active energy ray hardening adhesive is used for bonding, the bonding can be performed by applying the active energy ray hardening composition to one or all of the layers to be bonded, and then bonding, and It is hardened by irradiating active energy rays through one adhesive layer or two adhesive layers. The thickness of the adhesive layer when the active energy ray hardening adhesive is used may be 0.01 μm to 20 μm, preferably 0.1 μm to 10 μm. When multiple layers of the active energy ray-curable adhesive are used, the thickness or type of each layer may be the same or different from each other.

As the adhesive, any one classified into acrylic adhesives, urethane adhesives, rubber adhesives, silicone adhesives, etc. according to the resin polymer may also be used. In addition to blending resin polymers, the adhesive can also be blended with cross-linking agents, silane-based compounds, ionic compounds, cross-linking catalysts, antioxidants, adhesion-imparting agents, plasticizers, dyes, pigments, inorganic fillers, etc. Each component constituting the adhesive is dissolved and dispersed in a solvent to obtain an adhesive composition, and the adhesive composition is applied to a substrate and dried to form an adhesive layer. The adhesive layer may be directly formed, or a layer formed on the substrate may be transferred separately. In order to cover the adhesive surface before bonding, it is also preferable to use a release film. The thickness of the adhesive layer when the adhesive is used may be 1 μm to 500 μm, preferably 2 μm to 300 μm. When multiple layers of the adhesive are used, the thickness or type of each layer may be the same or different.

[Shading Pattern] The light-shielding pattern can be applied as at least a part of the frame or housing of the flexible image display device. When the light-shielding pattern is included, the wiring arranged at the edge of the flexible image display device is covered and is difficult to see. Therefore, the visibility of the image can be improved. The light-shielding pattern may be in the form of a single layer or multiple layers. The color of the shading pattern is not particularly limited, and there are various colors such as black, white, and metallic. The light-shielding pattern can be formed by pigments used to express colors, and polymers such as acrylic resins, ester resins, epoxy resins, polyurethanes, silicones, etc., and can be used alone or in a mixture of two or more. use. The light-shielding pattern can be formed by various methods such as printing, photolithography, and inkjet. The thickness of the light-shielding pattern may be 1 μm to 100 μm, and preferably may be 2 μm to 50 μm. In addition, 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 relates to a manufacturing method of an optical laminate, which includes: a stage of providing at least one optical member; a stage of providing a flexible front panel on the optical member; The stage of bonding with the flexible front panel; and the stage of cutting the bonded optical member and the flexible front panel more than once per unit, and the opposing ends of the optical member In the middle, the most retracted end of the optical member is cut so that the distance inward from the end of the flexible front panel is less than 2.0 mm.

The content can be applied to the content of the flexible front panel and the optical member.

If it is a general use method in this field in which a flexible front panel is provided on the optical member and bonded, it is not particularly limited in the present invention.

For example, the flexible front panel can be bonded to the optical member via an adhesive member, but it is not limited to this.

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

The optical member and the flexible front panel bonded through the stage of bonding the optical member and the flexible front panel are cut together more than once in a unit.

The cutting may be performed more than twice as necessary, but it is not limited to this. Specifically, the cutting can be performed using the minimum energy to minimize the deformation of the cross section. In the case of an optical laminate including a plurality of optical members, the cutting can be performed using the minimum energy for each optical member. Cut off several times.

1 and 4, in the case of a conventional optical laminate, since the front panel and the optical member are separately cut and bonded together, there is a problem of reduced screen ratio due to the non-display area. In addition, the problem of cracks at the end may occur somewhat when bent.

However, referring to FIGS. 2 and 5, the method of manufacturing the optical laminate of the present invention cuts the bonded optical member and the flexible front panel together, so that the non-display area can be reduced, and the screen ratio is excellent. , And can reduce the deviation of the stress that appears in the cross-sectional deviation area of the optical member laminated with the flexible front panel during bending. Therefore, the problem of cracks at the end can be suppressed during bending, and the bending durability is also excellent. advantage.

Specifically, among the cut opposing ends of the optical member, the most retracted end of the optical member exists at a receding distance of less than 2.0 mm inward from the end of the flexible front panel s position.

It is preferable that among the opposing ends of the cut optical member, the most protruding end of the optical member and the most retracted end of the optical member may exist in the flexible The position where the distance from the end of the front panel to the outside is 0.2 mm or less to the position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

The manufacturing method of the optical laminate of the present invention is a manufacturing method of forming the cut end of the optical member at a position close to the end of the flexible front panel, and therefore has the advantage of excellent bending performance .

The distance between the position of the end of the optical member and the position of the end of the flexible front panel can be adjusted according to, for example, the focal length of the lens for condensing laser light, the output of the laser, or the cutting speed, etc. . The focal length of the lens can be set to, for example, 10 mm to 100 mm.

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

When the optical member includes a substrate and includes a polarizing layer and/or a touch sensor, the polarizing layer and/or the touch sensor may exist closer to the flexible front panel.

In another embodiment of the present invention, it may further include a step of forming an adhesive member between the two or more optical members. Wherein, the step of forming the adhesive member is preferably included before the step of bonding the bonded optical member and the flexible front panel on a unit basis.

Since the optical laminate manufactured by the method of manufacturing the optical laminate of the present invention includes the stage of simultaneously cutting the flexible front panel and the optical member, it has an excellent screen ratio and can be reduced with the flexible front panel when bent. Since the deviation of the stress that appears in the cross-sectional deviation area of the optical members laminated together can suppress the phenomenon of cracks at the end portion, it has the advantage of excellent bending durability.

[Wavelength range of laser light] In the cutting step, the wavelength of the laser light emitted from the laser device is a wavelength of 9 μm or more and 11 μm or less. In particular, laser light with wavelengths around 9.3 μm (9.1 μm to 9.7 μm) and 10.6 μm (10.1 μm to 11 μm) _{can be output stably when CO 2} gas laser equipment is used as the laser equipment. Therefore, when laser light of such a wavelength is used, the manufacturing method of the present invention can be performed particularly well.

The cutting speed is preferably in the range of 100 mm/s to 500 mm/s, and the output is preferably set to 10% to 30% of the maximum output. In this case, it is preferable because the section is neat when the film is cut. The number of times of irradiation is preferably 1 to 2 times. In order to cut the film, it may be carried out as many times as necessary.

[Image display device] The image display device is not particularly limited, and may be composed of the optical laminate and the organic EL display panel, and the optical laminate may be arranged on the visible side with respect to the organic EL display panel and configured to be flexible. The optical laminate includes a flexible front panel, and one or more optical members existing in a lower portion of the flexible front panel. Specifically, the optical member may include the flexible front panel, a polarized light Board, touch sensor. The stacking sequence of the flexible front panel, the polarizing plate, and the touch sensor can be applied to the content described above, but is not limited to this.

Hereinafter, examples are listed for detailed description, so as to specifically describe the specification. However, the embodiments of this specification can be modified in various other forms, and it is not construed that the scope of this specification is limited to the embodiments described in detail below. The embodiments of this specification are provided for persons with ordinary knowledge in the field, so as to more fully explain this specification. In addition, in the following, unless otherwise stated, the "%" and "parts" indicating the content are based on weight.

<Members used in Examples (Members used)> Flexible front panel (hereinafter referred to as WIN) A film with hard coats formed on both sides of the base film: thickness 70 μm, coefficient of elasticity 3457 MPa Substrate film: thickness 50 μm, polyimide-based (PI) resin film Hard coat layer: 10 μm thick, layer formed of a composition containing a dendrimer compound having a polyfunctional acrylic group at the end

Polarizing plate (hereinafter referred to as POL) A laminate formed in the order of Triacetyl Cellulose (TAC) / polarizing layer / retardation film, thickness 44.5 μm TAC: thickness 25 μm, coefficient of elasticity 3,282 MPa, Konica Minolta (shares) Polarizing layer: thickness 2.5 μm, elastic coefficient 937 MPa Retardation film: thickness 17 μm Laminated structure of retardation film: outer coating (hardened layer of acrylic resin composition, thickness 1 μm, elastic coefficient 4,510 MPa)/adhesive layer (thickness 5 μm, elastic coefficient 0.11 MPa)/cured by liquid crystal compound Λ/4 retardation plate (thickness 3 μm, elastic coefficient 1,624 MPa)/adhesive layer (thickness 5 μm, elastic coefficient 0.11 MPa)/layer hardened by liquid crystal compound and alignment film Positive C plate (thickness 3 μm, elastic coefficient 2,039 MPa)

Touch sensor (hereinafter referred to as TS) Touch sensor: thickness 33 μm, layer structure: touch sensor pattern (a laminate of ITO and acrylic resin composition hardened layer, thickness 7 μm, coefficient of elasticity 4,510 MPa)/adhesive layer (thickness 3 μm, elastic coefficient 12,309 MPa)/Cyclic olefin resin film (thickness 23 μm, elastic coefficient 1,785 MPa)

Adhesive member (Optically Clear Adhesive (hereinafter referred to as OCA)) The acrylic adhesive layer was used, and the thickness was set to 25 μm, and it was manufactured by the following manufacturing method. On a weight basis, 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- Hydroxycyclohexyl phenyl ketone mixed. The mixed liquid is irradiated with ultraviolet rays to polymerize the monomers.

Thereafter, 0.4 parts by weight of 1-hydroxycyclohexyl phenyl ketone, 0.3 parts by weight of lauryl acrylate, and 0.05 parts by weight of polyethylene glycol (200) diacrylic acid were added to the mixture as a polymerization initiator. Ester, 0.05 parts by weight of (3-glycidyloxypropyl)trimethoxysilane to produce an adhesive composition.

The adhesive composition is applied to a polyethylene terephthalate film (release film) treated with silicone on the surface. The thickness of the coating was set to 25 μm. Prepare other release films and layer them on the coating. The layered body having the structure of the release film/coating layer of the adhesive composition/release film is irradiated with ultraviolet rays. In the ultraviolet irradiation step, the laminated body is irradiated with ultraviolet rays of 300 nm to 400 nm (the luminous intensity is extremely high at 365 nm) with a cumulative light amount of 1500 mJ/cm ^2. In this way, an adhesive sheet containing a (meth)acrylic adhesive layer was produced.

Polyimide resin film (hereinafter referred to as PI) Polyimide resin film (PI), thickness 38 μm, coefficient of elasticity 4,865 MPa, Kolon (share) (Korea)

Ink for shading pattern (composition for forming colored layer) [Ink composition] Acetylene black 15% by weight Polyester 75% by weight Dimethyl glutarate 2.5% by weight Succinic acid 2% by weight Isophorone 5.5% by weight [hardener] Aliphatic polyisocyanate 75% by weight Ethyl acetate 25% by weight [Solvent] Isophorone 100% by weight [Production method] To 100 parts by weight of the ink components, 10 parts by weight of the hardener and 10 parts by weight of the solvent were added and mixed to obtain a composition for forming a colored layer (black).

Cell shape (cell shape) A quadrilateral shape with a horizontal and vertical shape in the longitudinal direction

Example 1 On one side of the flexible front panel, a screen printing method is used to form a light-shielding pattern (non-display area) with a bezel (light-shielding pattern) ink with a thickness of 3 μm after drying.

The OCA (thickness 25 μm) is used so that it is in contact with the frame (light-shielding pattern) surface of the flexible front panel (thickness 70 μm), and the POL (thickness 70 μm), TS, and PI substrates are sequentially bonded using a bonding machine. Manufacture of optical laminates.

For the optical laminate, using the frame of the frame (light-shielding pattern) as a reference, a CO ₂ laser cutting machine (60 W output) manufactured by LP Tech (LPTech) (hereinafter, laser cutting machine) is used, Set the incident wavelength to 9.3 μm, use a lens with a focal distance of 38 mm to focus the laser light from the other side of the flexible front panel (the side where no frame is formed), and at a speed of 400 mm/s, an output of 30%, and the number of exposures Cutting was performed under the conditions of one pass, and an optical laminate (cell form) having a cross-sectional shape as shown in Table 1 was produced.

Example 2 After manufacturing the optical laminate by the same method as in Example 1, a laser cutter was used to focus the laser light with a lens with a focal length of 42 mm, at a speed of 400 mm/s, an output of 15%, and the number of irradiations once. After cutting once under the conditions of, the laser light is collected by a lens with a focal distance of 38 mm, and the laser is cut twice at a speed of 400 mm/s, an output of 30%, and the number of times of irradiation. Optical laminate with general cross-sectional shape (cell form).

Example 3 Except that the TS layer is not included, the optical laminate is manufactured by the same method as in Example 1, using a laser cutter, using a lens with a focal distance of 42 mm to focus the laser light, and at a speed of 400 mm/s and an output of 10% , After cutting once under the condition of 1 shot, use a lens with a focal distance of 38 mm to focus the laser light, and perform 2 cuts at a speed of 400 mm/s, output 30%, and 1 shot. , To manufacture an optical laminate (cell form) having a cross-sectional shape as shown in Table 1.

Example 4 Except that the POL layer is not included, an optical laminate is manufactured by the same method as in Example 1. A laser cutter is used to condense the laser light with a lens with a focal distance of 42 mm, and at a speed of 400 mm/s and an output of 10% , After cutting once under the condition of 1 shot, use a lens with a focal distance of 38 mm to focus the laser light, and perform 2 cuts at a speed of 400 mm/s, output 30%, and 1 shot. , To manufacture an optical laminate (cell form) having a cross-sectional shape as shown in Table 1.

Example 5 After manufacturing the optical laminate by the same method as in Example 1, a laser cutter was used to focus the laser light with a lens with a focal length of 42 mm, at a speed of 400 mm/s, an output of 15%, and the number of irradiations once. After cutting once under the conditions of, use a lens with a focal distance of 38 mm to focus the laser light, and perform cutting twice under the conditions of a speed of 400 mm/s, an output of 15%, and the number of times of irradiation. Optical laminate with general cross-sectional shape (cell form).

Example 6 After manufacturing the optical laminate by the same method as in Example 1, a laser cutter was used to focus the laser light with a lens with a focal length of 42 mm, at a speed of 400 mm/s, an output of 15%, and the number of irradiations once. After cutting once under the conditions of, use a lens with a focal distance of 38 mm to focus the laser light, and perform cutting twice under the conditions of a speed of 400 mm/s, an output of 25%, and the number of times of irradiation. Optical laminate with general cross-sectional shape (cell form).

Comparative example 1 After fabricating a flexible front panel with a frame (light-shielding pattern) formed by the same method as in Example 1, it was cut by the same method as in Example 1, and prepared in a unit form.

An optical laminate was produced by bonding OCA in the order of OCA and POL/TS/PI. The sides were cut by the same method as in Example 1 so that each side was about 4 mm smaller than the flexible front panel. .

The flexible front panel unit and the cut optical laminate were joined so that the center and the verticality were aligned to produce an optical laminate (unit form) having a cross-sectional shape as shown in Table 1.

Comparative example 2 After fabricating a flexible front panel with a frame (light-shielding pattern) formed by the same method as in Example 1, OCA and POL were used for bonding.

The flexible front panel and the POL optical laminate were cut by the same method as in Example 1, and prepared in a unit form.

An optical laminate in which OCA and PI substrates were joined was produced, and the sides were cut by the same method as in Example 1 so that each side was 4 mm smaller than the flexible front panel.

The flexible front panel and the optical laminate were joined so that the center and the perpendicularity were aligned, and an optical laminate (cell form) having a cross-sectional shape as shown in Table 1 was produced.

Comparative example 3 The flexible front panel and the TS optical laminate were cut by the same method as in Example 1 and prepared in the form of a unit, except that the same as in Comparative Example 1 was produced with a cross-section as shown in Table 1. Shaped optical laminate (cell form).

Experimental example Regarding the samples produced in the Examples and Comparative Examples, the end distance deviation was confirmed using an optical microscope, and the bending evaluation was performed by the following method.

With respect to the optical laminates obtained in the respective Examples and Comparative Examples, a bending evaluation device (manufactured by Science Town Co., Ltd., STS-VRT-500) was used to confirm the durability against bending, and an evaluation test was performed.

Fig. 6 is a diagram schematically showing this evaluation test method. As shown in Figure 6, the two platforms 201 and 202 that can be moved independently are arranged so that the gap C is 5.0 mm (2.5 R), and the center in the width direction is located at the center of the gap C. The embodiment is fixed and arranged with tape And the optical laminate of the comparative example (FIG. 7(a), FIG. 7(b)). At this time, when the front surface becomes a flexible front panel, it is IN FOLDING, and when the rear surface becomes a flexible front panel, it is OUT FOLDING. For example, FIG. 7(a) and FIG. 7(b) can be understood as a structure in which the optical laminates of FIGS. 4 and 5 are respectively fixed with adhesive tapes in accordance with the above-mentioned standards. Then, the two stages 201 and the stage 202 are rotated upward by 90 degrees with the position P1 and the position P2 as the center of the rotation axis, and a bending force is applied to the region of the optical laminate 100 corresponding to the gap C of the stage. After that, the two platforms 201 and 202 are returned to their original places. The above series of operations are ended, and the number of times the bending force is applied is determined to be one. Accumulate the number of times the bending force is applied, and confirm whether there are bubbles or cracks in the deviation area of the optical laminate corresponding to the gap C between the platform 201 and the platform 202 and the end size of the flexible front panel (Figure 7(a)) 7(b) X), the evaluation of bending was interrupted at the time when bubbles or cracks were generated, and the evaluation was performed according to the following criteria, and the evaluation results are shown in Table 1. The moving speed of the stage 201 and the stage 202 and the degree of application of the bending force were set to the same conditions in any evaluation test for the optical laminate.

At this time, the evaluation criteria of flexibility are as follows. ◎: More than 200,000 times 〇: 150,000 times or more but less than 200,000 times △: more than 100,000 times and less than 150,000 times ×: More than 50,000 times but less than 100,000 times ××: Less than 50,000 times

[Table 1] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example 1 Comparative example 2 Comparative example 3 The structure of the optical laminate Figure 8(a) Figure 8(b) Figure 8(c) Figure 8(d) Figure 8(e) Figure 8(b) Figure 9(a) Figure 9(b) Figure 9(c) The distance between the 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 (inside) 0.9 (inside) 1.0 (inside) 1.0 (inside) 0.2 (outside) 0.9 (inside) 1.9 (Inside) 2.0 (inside) 2.1 (Inside) Flexibility (2.5 R) IN Folding ◎ ○ ◎ ◎ ◎ ○ ×× ×× ×× OUT Folding ◎ △ ○ ○ ◎ △ ×× X ××

With reference to Table 1 above, it can be confirmed that the distance (deviation) between the flexible front panel and the end of the lower optical member has an effect on the bending performance. It is found that in the optical laminate of the present invention, the distance between the ends is smaller , The more it shows excellent bending performance.

100: Optical laminate 10: Flexible front panel 20: Optical components 21: Polarizing plate (POL) 22: Touch Sensor (TS) 23: Substrate (PI) 30: Adhesive components 40: Non-display area X: The location of cracks, bubbles or cracks 201, 202: Platform 300: display area 301: Non-display area 302: The width of the non-display area (A), (B), (C): the distance between the ends C: gap P1, P2: location

FIG. 1 is a diagram illustrating a conventional optical laminate and a screen ratio based on it. Fig. 2 is a diagram illustrating the structure of the optical laminate of the present invention. FIG. 3 is a diagram illustrating the width of the display area, the non-display area, and the non-display area. Fig. 4 is a diagram illustrating a state after bending a conventional optical laminate. Fig. 5 is a diagram illustrating a state after bending the optical laminate of the present invention. Fig. 6 is a diagram illustrating a bending test method of an experimental example. FIG. 7(a) is a diagram illustrating the bending test method of in-folding (IN-FOLDING) and out-folding (OUT-FOLDING) of a conventional optical laminate (comparative example) and the location of the main cracks caused by bending formula. Fig. 7(b) illustrates the bending test method of in-folding (IN-FOLDING) and outward-folding (OUT-FOLDING) of the optical laminate (experimental example) of the present invention, and the location of the main cracks caused by bending figure. 8(a) to 8(e) are diagrams illustrating the structure of the optical layered body and the deviation portion of the embodiment. 9(a) to 9(c) are diagrams illustrating the structure of the optical laminate of the comparative example and the deviation portion.

10: Flexible front panel

20: Optical components

30: Adhesive components

40: Non-display area

100: Optical laminate

Claims (4)

An optical laminate, including: a flexible front panel, and At least one optical member present in the lower part of the flexible front panel, and Among the opposing ends of the optical member, the most retracted end of the optical member is located at a position where the distance inward from the end of the flexible front panel is less than 2.0 mm. The optical laminate according to claim 1, wherein the most protruding end and the last retracted end of the optical member are located at a distance of 0.2 mm or less from the end of the flexible front panel to the outside The position to the position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm. A method for manufacturing an optical laminate includes: The stage of providing at least one optical component; The stage of providing a flexible front panel on the optical component; The stage of bonding the optical member and the flexible front panel; and The stage of cutting the bonded optical member and the flexible front panel more than once per unit, and With the opposing ends of the optical member, The most retracted end of the optical member is cut so that the distance inward from the end of the flexible front panel is less than 2.0 mm. The method of manufacturing an optical laminate according to claim 3, wherein the most protruding end and the last retracted end of the optical member are located at a distance of 0.2 to the outside from the end of the flexible front panel A position below mm to a position where the distance to the inside from the end of the flexible front panel is less than 2.0 mm.

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