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WO2014117333A1 - Dispositifs d'affichage et procédés d'assemblage - Google Patents

Dispositifs d'affichage et procédés d'assemblage Download PDF

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Publication number
WO2014117333A1
WO2014117333A1 PCT/CN2013/071124 CN2013071124W WO2014117333A1 WO 2014117333 A1 WO2014117333 A1 WO 2014117333A1 CN 2013071124 W CN2013071124 W CN 2013071124W WO 2014117333 A1 WO2014117333 A1 WO 2014117333A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible
optically
film
adhesive
clear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/071124
Other languages
English (en)
Inventor
Ingo De WILDE
Shengming XIE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stokvis Tapes Shanghai Co Ltd
Original Assignee
Stokvis Tapes Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stokvis Tapes Shanghai Co Ltd filed Critical Stokvis Tapes Shanghai Co Ltd
Priority to PCT/CN2013/071124 priority Critical patent/WO2014117333A1/fr
Publication of WO2014117333A1 publication Critical patent/WO2014117333A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/408—Matt, dull surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133325—Assembling processes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • Embodiments of the invention relate to methods for assembling a laminated, multi-layered display device.
  • Display devices such as liquid crystal displays (LCDs) are used in a variety of applications.
  • LCDs liquid crystal displays
  • a tempered glass or transparent plastic overlayer or an actively functional touch interface or screen is laminated over the surface of the LCD unit.
  • OCA optically clear adhesive
  • PSA pressure-sensitive adhesive
  • the present invention relates to multi-layered display devices and methods of fabricating the devices.
  • the methods of the invention provide a better and more reliable yield, a faster assembly process (without batch processing), and can be performed by a Tier 1 or OEM (Original Equipment Manufacturer) rather than by the LCD or touch panel manufacturer.
  • the layered display device comprises a non-flexible first substrate, an optically clear adhesive layer of a flexible adhesive preform adherently attached to the surface of the non-flexible first substrate, the optically clear adhesive layer situated on an optically clear flexible film, and a non- flexible second substrate mounted to the second side of the flexible film by a uniformly thick optically clear adhesive film therebetween.
  • the layered display device is further characterized in that substantially no air bubbles exist between the optically-clear adhesive layer of the adhesive preform and the surface of the non- flexible first substrate, and that substantially no air bubbles are situated within the uniformly thick optically-clear adhesive film between the second substrate and the flexible film.
  • the layered display device is in an intermediate form in which the optically-clear adhesive film on the second side of the flexible film is in liquid form.
  • the optically-clear adhesive film on the second side of the flexible film of the layered display device is in a cured, solid form.
  • the optically-clear flexible film comprises an outer edge and a trench in the second side of the film extending about the outer edge, and further, the film may have a thickness and the trench has a depth of up to one-half of said thickness of the film.
  • the invention further provides methods for fabricating a layered display device.
  • the method includes:
  • the optically-clear flexible film may comprise an outer edge and a trench in the second side of the film extending about the outer edge, and step c) may comprise allowing the liquid adhesive to flow into and along the trench.
  • FIG. 1 is a diagrammatic cross-sectional, elevational view of an
  • FIG. 2 is an exploded view of the display device of FIG. 1.
  • FIGS. 3-9 illustrate sequential steps of an embodiment of a method according to the invention to fabricate the display device of FIG.l.
  • FIG. 3 is a diagrammatic, cross-sectional, elevational view of an adhesive preform prior to mounting.
  • FIG. 4 is a diagrammatic, cross-sectional, elevational view of the adhesive preform of FIG. 3 being attached to a first substrate.
  • FIG. 5 is a diagrammatic, cross-sectional, elevational view of the adhesive preform attached to the first substrate, taken along lines 5-5 of FIG. 5A.
  • FIG. 5A is a top plan view of the adhesive preform of FIG. 5, showing the center area and adjacent perimeter section on the surface of the flexible film.
  • FIG. 6 is a diagrammatic
  • FIG. 6A is a top plan view of the OCA liquid situated within the center area of the flexible film.
  • FIG. 7 is a diagrammatic, cross-sectional, elevational view of a second substrate positioned on the OCA liquid.
  • FIG. 8 is a diagrammatic, cross-sectional, elevational view of a subsequent step with the second substrate positioned above the flexible film of the adhesive preform and the OCA liquid flow to form a layer therebetween.
  • FIG. 9 is a diagrammatic, cross-sectional, elevational view of the curing of the OCA liquid layer.
  • FIG. 10 illustrates a cross-sectional, side elevational view of another embodiment of a display device according to the invention, in which the surface of the optically clear polymeric film is structured to include a trench.
  • FIG. 10A is a top plan view of the device in FIG. 10, showing the OCA liquid situated within the center area of the polymeric film with the trench situated along the perimeter/edges of the film.
  • FIG. 11 is a cross-sectional, side elevational view of a subsequent step with the second substrate positioned over the OCA liquid and the OCA liquid flow into the trench.
  • FIG. 11A is a top plan view of FIG. 11 taken along line A- A, showing the spread direction of the OCA liquid along the trench.
  • the following description with reference to the drawings provides illustrative examples of systems and methods according to embodiments of the invention. Such description is for illustrative purposes only and not for purposes of limiting the same.
  • the invention provides laminated, layered display devices and methods for fabricating the devices. The methods can be used, for example, for bonding a transparent cover plate of a cellular phone or a touch panel to a flat display such as a liquid crystal display device, bonding a front glass panel to an ITO glass or film, among other applications.
  • substantially free of air bubbles means that bubbles including micro-bubbles greater than about 0.02mm 2 are not present within the cured OCA film formed from an OCA liquid and/or between the adhesive layer of the adhesive preform and attached substrate, e.g., the first substrate (display).
  • top bottom
  • upper lower
  • lower are for convenience and illustrative purposes only, and are not meant to limit the description of the invention inasmuch as the referenced item can be exchanged in position.
  • a first embodiment of a layered display device according to the invention is depicted in a cross-sectional, elevational view in FIG. 1 and an exploded view in FIG. 2.
  • the layered display device 10 can be, for example, a flat panel display device, a cellular phone display device, a display for a portable computing device such as a personal data assistant (PDA), a smartphone, a monitor, a television display, or other electronic or graphic display, or an interactive display device such as a touch screen display, which can be found on devices such as cellular phones, PDAs, point of sale systems, household appliances, etc.
  • PDA personal data assistant
  • the shape and thickness of the display device 10 can vary, being rectangular in the present embodiment.
  • the layered display device 10 includes a non-flexible (rigid), first substrate 12 having opposing first and second surfaces 14, 16.
  • the non-flexible, first substrate 12 is a flat or curved display comprising, for example, a reflective,
  • first substrate 12 typically comprises a glass or plastic substrate.
  • a flexible adhesive preform 18 is adhesively attached (e.g., laminated) to the first surface 14 of the non-flexible first substrate 12, such that there is substantially no air bubbles therebetween.
  • the adhesive preform 18 is composed of a flexible and optically clear (transparent) polymeric film 20 having opposing first and second sides 22, 24, and a layer 26 of an optically-clear adhesive (OCA) material on the first side 22 of the film 20, which is attached to the first surface 14 of the first substrate 12.
  • OCA optically-clear adhesive
  • the adhesive preform 18 can be produced, for example, by laminating an optically-clear pressure-sensitive adhesive (OC PSA) 26 (situated on a carrier 28) to an optically-clear, flexible plastic film 20, for example, using a nip roll laminator, and then die-cutting the sheet to dimensions that correspond to the shape and size of the substrate to which it will be attached, e.g., the first surface 14 of the first substrate 12.
  • O PSA optically-clear pressure-sensitive adhesive
  • the flexible, optically clear polymeric film 20 can be formed of a plastic material such as a polyester, for example, polyethylene terephthalate (PET), or polyethylene naphthalate (PEN), polycarbonate (PC), etc., a polyimide (PI), etc.
  • adhesives usable for the adhesive layer 26 generally include acrylates, silicone, urethanes, and the like.
  • Optically-clear pressure-sensitive adhesive (OC PSA) 26 on a releasable carrier 28 i.e., a release sheet or liner
  • the adhesive preform 18 includes a release sheet or liner 28 (FIG. 3) as a cover over the adhesive layer 26, which can be readily removed to expose the surface 30 of the adhesive layer 26 for attachment to the first substrate 12.
  • a non- flexible (rigid) second substrate 32 is bonded by an inner surface 34 to the second side 24 of the flexible film 20 by a cured, uniformly thick, optically-clear adhesive (OCA) film 36 to form the laminated, layered display device 10.
  • OCA film 36 is substantially free of air bubbles.
  • the OCA film 36 is formed from an optically-clear adhesive (OCA) liquid 36a, which hardens to form a solid film 36.
  • OCA liquids include acrylates, urethanes, epoxies, and the like.
  • the OCA film 36 is formed from a curable liquid adhesive (36a), for example, a UV curable adhesive liquid.
  • the curable adhesive liquid 36a typically remains in a liquid phase prior to curing.
  • the OCA film 36 is in a cured, solid form after curing.
  • the thickness of the OCA film 36 can vary. In some embodiments, the film 36 can be about 0.01-0.5mm thick, and in other embodiments about 0.05-0.1mm thick.
  • the layered display device 10 comprises a first substrate 12 composed of a display, and a second substrate 32 comprising an optically clear (transparent) top plate or cover or a capacitive touch panel.
  • the first substrate 12 of the layered display device 10 comprises an optically clear top plate or cover or a capacitive touch panel
  • the second substrate 32 comprises a display
  • An optically-clear top plate or cover can be fabricated, for example, from glass or a transparent plastic material such as an polyacrylate resin, polycarbonate, polyethylene terephthalate (PET), poly(methyl methacrylate) (PMMA), and the like.
  • a capacitive touch panel (or plate or screen) can be installed, for example, to operate an LCD panel.
  • the thickness of a top plate/cover or touch panel can vary depending, for example, on device requirements, device size, etc., generally ranging between about 50 ⁇ and about 500 ⁇ in thickness.
  • the outer surface (e.g., 16 or 38) of a top plate can be covered with an additional film coating or laminate (not shown), such as a low reflective film, scratch-resistant hard coat film, anti-glare film, and/or anti-reflective film, among others.
  • an additional film coating or laminate such as a low reflective film, scratch-resistant hard coat film, anti-glare film, and/or anti-reflective film, among others.
  • the individual layers optically match to enhance the optical
  • the adhesive preform 18 and the adhesive film 36 should not disturb the reflective index and transparency of the second substrate 32 (e.g., top plate, touch panel, etc.) or viewing of the underlying display.
  • the layers (e.g., 18, 36) overlying a display are preferably composed of index-matched materials such that the refractive indices are substantially similar.
  • FIGS. 3-8 illustrate an embodiment of a method for fabricating the layered display device 10 depicted in FIGS. 1-2.
  • the methods can be used, for example, to bond a display to a top panel or touch panel, or a front panel to an ITO glass layer, or other layered structure, without allowing air bubbles to form during the assembly process.
  • FIG. 3 depicts a flexible, adhesive preform 18 before lamination, showing the removal of a carrier or release sheet 28 (where used) from the surface 30 of the adhesive layer 26.
  • the exposed surface 30 of the adhesive layer 26 is brought into contact with the exposed surface 14 of the first substrate 12.
  • Air bubbles can form at the interface between the adhesive layer 26 and the surface 14 of the first substrate 12 when bonding them together.
  • a full surface lamination of the first substrate 12 and the adhesive preform 18 can be performed by rolling the adhesive preform 18 onto the exposed surface 14 of the first substrate 12 as shown in FIG. 4, for example, from one edge 40a to the other edge 40b of the first substrate. This provides an adhesive attachment of the flexible adhesive preform 18 to the non- flexible first substrate 12 such that there are substantially no air bubbles
  • Lamination pressure with rollers is typically applied onto the adhesive preform 18 to assist and/or enhance bonding to the first substrate 12, for example, at about 1-4 bars (about 20-60psi), optionally with low heat, for example, at about 23-60°C, or in some embodiments, at about50-60°C.
  • the adhesive preform 18 mounted on the first substrate 12 is illustrated in FIG. 5.
  • the second side 24 of the flexible film 20 can be generally divided into a center area 42 surrounded or encircled by a perimeter section 44 situated adjacent to and along the outer edge 46 of the flexible film 20.
  • an optically-clear adhesive (OCA) liquid 36a is dispensed in the form of a center drop or line 42 onto the center section of the second side 24 of the flexible film 20 of the adhesive preform 18 for bonding a second substrate 32 to the first substrate 12.
  • OCA liquid 36a is preferably matched to the index of refraction of the underlying adhesive preform 18 and the second substrate 32.
  • the liquid adhesive can be a heat, radiation or room temperature curable adhesive or, in preferred embodiments, an ultra-violet (UV) curable adhesive material.
  • the amount of OCA liquid 36a dispensed onto the flexible film can be calculated based upon the desired thickness of the cured OCA layer and the surface area of the flexible film 20 and/or the first substrate 12.
  • the OCA liquid 36a can be dispensed in a line onto the flexible film 20, preferably in a straight or slightly bent line.
  • the inner surface 34 of the second substrate 32 e.g., a top plate, is positioned to face the uncured OCA liquid 36a on the flexible film 20.
  • the second substrate 32 is then lowered (arrows H) onto the OCA liquid 36a but suspended or positioned at a distance above the flexible film 20 to form a flow channel 48 therebetween, the distance being determined by the desired thickness of the OCA layer 36.
  • the exposed outer surface 24 of the flexible film 20 and inner surface 34 of the second substrate 32 are composed of a material that can become wetted by the OCA liquid 36a.
  • the OCA liquid 36a will wet out over the surfaces of the flexible film 20 and the second substrate 32 and flow (arrows ⁇ ⁇ ) from the center area 42 to the outer edge 46 of the flexible film 20 by capillary action and/or by pressure applied to the second substrate 32, without the formation of air bubbles within the OCA liquid layer 36a.
  • Entrapped air bubbles within the OCA liquid 36a layer are avoided by the flow of liquid outward from the center 42 to the edges 46, which displaces the air bubbles.
  • a suitable viscosity of the OCA liquid 18 is about 50 to 10,000 cps (ASTM D789, D4878).
  • the resulting layer of the OCA liquid 36a is a uniformly thick layer that contains substantially no air bubbles, which in some
  • embodiments is about 0.01-0.5 mm thick.
  • the non-flexible first substrate 12, the adhesive preform 18 (flexible substrate 20, optically clear adhesive 26) and the optically-clear adhesive (OCA) liquid 36a form an intermediate structure for the layered display device 10.
  • the layer of the OCA liquid 36a is then cured to form a solid adhesive layer 36 (as shown in FIG. 1).
  • the OCA liquid 36a can be cured at room temperature or by the application of heat.
  • a UV curable OCA liquid is used, which can be exposed to UV radiation (e.g., wavelength of about 100-400nm) transmitted (arrows J, ) through the optically-clear (transparent) second substrate 32.
  • the characteristics of the cured OCA layer 36 include a refractive index of about 1.41 to about 1.51.
  • the optically clear polymeric film 20' is configured to include a trench 50' that extends into the surface 24' at a distance from the edges 46' of the film 20'.
  • the trench 50' can be cut or otherwise formed into the surface of the polymeric film 20.
  • the trench can be cut into the film by Laser kiss-cutting or kiss-cutting with V-shape blade tools.
  • the trench can be a "V" shape (or beveled) but other shapes are
  • the depth (d) of the trench 50' can vary and is preferably at least about one- half the thickness (i) of the film 20'.
  • the trench 50' functions to avert the curable adhesive liquid 36a' from flowing over the edges 46' and redirect the liquid adhesive 36a' in a sideways direction (parallel along the edges 56'; arrows 52') to equally spread the adhesive outwardly toward the edges 46' and produce a uniform thickness over the surface 24' of the film 20' to the edges 46'.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un dispositif d'affichage en couches (10, 10'), un élément intermédiaire destiné au dispositif d'affichage en couches (10, 10'), ainsi qu'un procédé de fabrication du dispositif d'affichage en couches (10, 10'). Ce dispositif d'affichage en couches (10, 10') comprend : un premier substrat non flexible (12, 12') possédant une surface (14, 14') ; une couche adhésive optiquement transparente (26, 26') d'une préforme adhésive (18, 18') flexible fixée de façon adhérente à la surface (14, 14') du premier substrat non flexible (12, 12'), la préforme adhésive (18, 18') comportant un film flexible optiquement transparent (20, 20'), qui présente des premier et second côtés (22, 22', 24, 24'), ainsi que la couche adhésive optiquement transparente (26, 26') disposée sur le premier côté (22, 22') du film flexible (20, 20') ; et un second substrat non flexible (32, 32') monté sur le second côté (24, 24') dudit film flexible (20, 20') grâce à un film adhésif optiquement transparent et uniformément épais (36, 36') situé entre eux. Ce film flexible optiquement transparent (20, 20') comprend un bord extérieur (46'), ainsi qu'une tranchée (50') pratiquée dans le second côté (24, 24') du film (20, 20') et s'étendant autour du bord extérieur (46').
PCT/CN2013/071124 2013-01-30 2013-01-30 Dispositifs d'affichage et procédés d'assemblage Ceased WO2014117333A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/071124 WO2014117333A1 (fr) 2013-01-30 2013-01-30 Dispositifs d'affichage et procédés d'assemblage

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Application Number Priority Date Filing Date Title
PCT/CN2013/071124 WO2014117333A1 (fr) 2013-01-30 2013-01-30 Dispositifs d'affichage et procédés d'assemblage

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WO2014117333A1 true WO2014117333A1 (fr) 2014-08-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10921492B2 (en) 2018-01-09 2021-02-16 Corning Incorporated Coated articles with light-altering features and methods for the production thereof
US11940593B2 (en) 2020-07-09 2024-03-26 Corning Incorporated Display articles with diffractive, antiglare surfaces and methods of making the same
US12195384B2 (en) 2013-05-07 2025-01-14 Corning Incorporated Scratch-resistant laminates with retained optical properties

Citations (5)

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