CN107491226B - Optical touch film, display device including the same, and method of manufacturing the same - Google Patents
Optical touch film, display device including the same, and method of manufacturing the same Download PDFInfo
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- CN107491226B CN107491226B CN201710441432.XA CN201710441432A CN107491226B CN 107491226 B CN107491226 B CN 107491226B CN 201710441432 A CN201710441432 A CN 201710441432A CN 107491226 B CN107491226 B CN 107491226B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- 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
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Position Input By Displaying (AREA)
- Push-Button Switches (AREA)
- Liquid Crystal (AREA)
Abstract
The present disclosure relates to an optical touch film, a display device including the same, and a method of manufacturing the same, the optical touch film according to an exemplary embodiment including: a sensor layer including a plurality of touch electrodes for forming a sensor; an optical film; a curable adhesive layer between the sensor layer and the optical film; a separation layer on one surface of the sensor layer and comprising a polymeric organic material; and a high-refractive insulating layer disposed at a layer in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer.
Description
This application claims the priority and benefit of korean patent application No. 10-2016-.
Technical Field
The present disclosure relates to an optical touch film, a display device including the same, and a method of manufacturing the same.
Background
Display devices such as Liquid Crystal Displays (LCDs) and organic light emitting diode displays (OLED displays) include pixel electrodes and a photo-active layer. For example, an organic light emitting diode display includes an organic emission layer as an electro-optically active layer, and a liquid crystal display includes a liquid crystal layer as an electro-optically active layer. The pixel electrode is connected to a switching element such as a thin film transistor to which a data signal is applied, and the electro-optically active layer converts the data signal into an optical signal, thereby displaying an image.
In addition to the function of displaying images, the display device also provides a sensing function for enabling interaction with a user. The sensing function is a function of determining whether an object approaches or contacts a screen by detecting a change in pressure, electric charge, or light applied to the screen when a user approaches or contacts the screen using a finger, a touch pen, or the like to input characters or draw a picture, and acquiring contact information about a contact position or the like. The display device may receive an image signal based on the contact information to display an image.
The sensing function may be implemented by a sensor. The sensor may be classified according to various methods such as a resistive type, a capacitive type, an Electromagnetic (EM) type, and an optical type. Among them, the capacitive type sensor includes a plurality of touch electrodes capable of transmitting a detection signal. The touch electrodes may form sensing capacitors alone or with adjacent touch electrodes. If a conductor such as a finger approaches or makes contact with the sensor, a change in capacitance of the detection capacitor or a change in the amount of charged electric charge occurs, thereby determining the presence and position of the contact.
The plurality of touch electrodes may be disposed at a touch sensing area where contact can be sensed, and may be connected to a plurality of signal transmission wirings transmitting detection signals.
The sensor may be formed inside the display device (in-cell type), may be directly formed on an outer surface of the display device (on-cell type), or a separate touch sensor unit may be attached to the display device (add-on cell type). Specifically, in the case of a flexible display device, when a film is formed with a sensor, a method of attaching the film to a display panel (box-shaped) is mainly used.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The current exemplary embodiment reduces the thickness and manufacturing cost of the display device having the sensing function and improves the optical characteristics of the display device.
An optical touch film according to an exemplary embodiment includes: a sensor layer including a plurality of touch electrodes; a polarizing film; a curing-type adhesive layer between the sensor layer and the polarizing film; a separation layer on one surface of the sensor layer and comprising a polymeric organic material.
A display device according to an exemplary embodiment includes a display panel and an optical touch film, wherein the optical touch film includes: a sensor layer including a plurality of touch electrodes; a polarizing film; a curing-type adhesive layer between the sensor layer and the polarizing film; a separation layer on one surface of the sensor layer and comprising a polymeric organic material.
The sensor layer may further include a high refractive insulating layer having a refractive index of 1.5 or more.
The sensor layer may further include a connection part connecting two adjacent touch electrodes of the plurality of touch electrodes and located at a different layer from the plurality of touch electrodes, and the high-refractive insulating layer may be located between the plurality of touch electrodes and the connection part.
The sensor layer may further include: a connection portion connecting two adjacent touch electrodes of the plurality of touch electrodes and located at a different layer from the plurality of touch electrodes; and a first insulating layer between the plurality of touch electrodes and the connection portion, and a high refractive insulating layer may be on the connection portion.
A high refractive insulating layer may be between the plurality of touch electrodes and the curing type adhesive layer.
The sensor layer may further include: a connection part connecting two adjacent touch electrodes among the plurality of touch electrodes and located at a different layer from the plurality of touch electrodes; a first insulating layer between the plurality of touch electrodes and the connection portion; and a second insulating layer on the connection portion, and the high refractive insulating layer may be on the second insulating layer.
The high refractive insulating layer may include nanoparticles and an organic material.
The release layer may be adjacent to and in contact with the curable adhesive layer.
The sensor layer may be located between the display panel and the polarizing film.
An optical touch film according to an exemplary embodiment includes: a sensor layer including a plurality of touch electrodes for forming a sensor; an optical film; a curable adhesive layer between the sensor layer and the optical film; a separation layer on one surface of the sensor layer and comprising a polymeric organic material; and a high-refractive insulating layer disposed at a layer in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer.
A display device according to an exemplary embodiment includes a display panel and the optical touch film described above.
A method of manufacturing a display device according to an exemplary embodiment includes: coating a separating layer comprising a polymeric organic material on a carrier substrate; forming a sensor layer including a plurality of touch electrodes on the separation layer; separating the sensor layer and the separation layer from the carrier substrate; an adhesive layer is disposed between the sensor layer and the polarizing film, and the adhesive layer is hardened.
The step of forming the sensor layer may include coating a high refractive insulating layer having a refractive index of 1.5 or more.
The high-refractive insulating layer may be positioned between the plurality of touch electrodes and the adhesive layer.
The release layer may be adjacent to and in contact with the adhesive layer.
According to the current exemplary embodiment, the thickness of the display device having the sensing function may be reduced and the manufacturing cost may be reduced, and the optical characteristics of the display device, such as the transmittance improvement and the color variation minimization of the display device, may be improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a display device according to an exemplary embodiment.
Fig. 2 is a schematic top view of a display panel included in a display device according to an exemplary embodiment.
Fig. 3 is a schematic top view of a display panel included in an optical touch film according to an exemplary embodiment.
Fig. 4 is an enlarged view of a portion of the optical touch film shown in fig. 3.
FIG. 5 is a cross-sectional view of the optical touch film of FIG. 4 taken along line IV-IV'.
Fig. 6 and 7 are cross-sectional views of an intermediate product in an intermediate step of a process according to a method for manufacturing an optical touch film according to an exemplary embodiment, respectively.
Fig. 8 to 31 are each a sectional view of an optical touch film included in a display device according to an exemplary embodiment.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
In order to clearly explain the present invention, portions not directly related to the present invention are omitted, and the same reference numerals are attached to the same or similar constituent elements throughout the specification.
Further, the size and thickness of each configuration shown in the drawings are arbitrarily illustrated for better understanding and ease of description, but the present invention is not limited thereto. In the drawings, the thickness of layers, films, panels, regions, etc. are exaggerated for clarity. In the drawings, the thickness of some layers and regions are exaggerated for better understanding and ease of description.
It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Further, in the specification, the word "on … …" or "above … …" means on or under the object portion, and does not necessarily mean on the upper side of the object portion based on the direction of gravity.
Furthermore, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
Further, in the specification, the phrase "on a plane" means that the object portion is viewed from the top, and the phrase "on a cross section" means that a cross section of the object portion cut vertically is viewed from the side.
A display device according to an exemplary embodiment of the present invention will now be described with reference to fig. 1 to 5.
Fig. 1 is a schematic cross-sectional view of a display device according to an exemplary embodiment, fig. 2 is a schematic top view of a display panel included in a display device according to an exemplary embodiment, fig. 3 is a schematic top view of a display panel included in an optical touch film according to an exemplary embodiment, fig. 4 is an enlarged view of a portion of the optical touch film shown in fig. 3, and fig. 5 is a cross-sectional view of the optical touch film of fig. 4 taken along line IV-IV'.
The display device 1 according to an exemplary embodiment of the present invention, which is a display device having a sensing function, may be, for example, a display device having a function capable of sensing an external touch.
The display device 1 includes a display panel 300 displaying an image, an optical touch film 600, and a controller 700.
The display panel 300 and the optical touch film 600 may have main surfaces extending on planes parallel to the first direction Dr1 and the second direction Dr2, respectively, and the main surfaces of the display panel 300 and the optical touch film 600 may be observed when viewed in a third direction Dr3 perpendicular to the first direction Dr1 and the second direction Dr 2.
At least a portion of the display panel 300 and the optical touch film 600 may be flexible to deform, such as by bending, curving, or curling.
Referring to fig. 1, the display panel 300 and the optical touch film 600 may be disposed to be close in a direction parallel to the third direction Dr 3. The optical touch film 600 may be attached to the display panel 300 in the third direction Dr 3.
Referring to fig. 2, the display panel 300 includes a display area DA in which a plurality of pixels PX each as a unit for displaying an image are disposed. The display panel 300 may include display elements of various structures such as a liquid crystal panel including a liquid crystal layer and an organic light emitting panel including an organic light emitting element.
Referring to fig. 5, the optical touch film 600 may include an optical film 550, a sensor layer 400, an adhesive layer 10, and a separation layer 120a when viewed in a cross-sectional structure. The adhesive layer 10 may be located between the optical film 550 and the sensor layer 400, and the separation layer 120a may be located at any one surface of the sensor layer 400. Fig. 5 shows an example in which the adhesive layer 10 and the separation layer 120a are in contact with each other. In the present exemplary embodiment, the optical film 550 may be positioned between the sensor layer 400 and the display panel 300, but is not limited thereto. In other words, the sensor layer 400 may be disposed between the display panel 300 and the optical film 550.
The structure of the sensor layer 400 will be described in detail with reference to fig. 3 to 5.
Referring to fig. 3, the sensor layer 400 of the optical touch film 600 according to an exemplary embodiment may include a touch area TA and a peripheral area PA on a plane.
The touch area TA, which is an area capable of sensing a touch of an external object, may correspond to and overlap the display area DA of the display panel 300. Here, the touch of the external object includes a case where the external object approaches the display apparatus 1 or hovers in a proximity state and a case where the external object such as a finger of the user directly contacts the touch area TA.
A sensor capable of sensing contact is located in the touch area TA. The sensor may sense contact in various types, for example, may be various types such as a resistive type, a capacitive type, an electromagnetic type (EM), and an optical type. The structure of the capacitive type sensor (specifically, the interactive capacitive type sensor) will be described later as an example.
Referring to fig. 3, a sensor of an example embodiment may include a plurality of touch electrodes. In the case of the interactive capacitive type sensor, the plurality of touch electrodes may include a plurality of first touch electrodes 410 and a plurality of second touch electrodes 420, which are separated from each other.
In the touch area TA, the plurality of first touch electrodes 410 and the plurality of second touch electrodes 420 are alternately dispersed so as not to substantially overlap each other. The plurality of first touch electrodes 410 may be disposed according to a column direction and a row direction, and the plurality of second touch electrodes 420 may also be disposed according to a column direction and a row direction.
The first touch electrode 410 and the second touch electrode 420 may be located at substantially the same layer.
The plurality of first touch electrodes 410 arranged in the same column or row may be connected to each other or may be separated from each other inside or outside the touch area TA. Also, at least a portion of the plurality of second touch electrodes 420 arranged in the same column or row may be connected to each other or may be separated from each other inside or outside the touch area TA. For example, as shown in fig. 3, a plurality of first touch electrodes 410 disposed in the same row may be connected in the touch area TA, and a plurality of second touch electrodes 420 disposed in the same column may be connected to each other in the touch area TA.
In detail, the plurality of first touch electrodes 410 positioned in each row may be connected to each other through the first connection part 412, and the plurality of second touch electrodes 420 positioned in each column may be connected to each other through the second connection part 422.
Referring to fig. 3 to 5, the second connection portion 422 connecting adjacent second touch electrodes 420 may be located at the same layer as the second touch electrodes 420 and may include the same material as that of the second touch electrodes 420. That is, the second touch electrode 420 and the second connection portion 422 may be integrated and may be simultaneously patterned in the manufacturing process.
The first connection part 412 connecting the adjacent first touch electrodes 410 may be located at a different layer from the first touch electrodes 410. That is, the first touch electrode 410 and the first connection portion 412 may be separately formed in different processes.
According to another exemplary embodiment, the first connection part 412 may be located at the same layer as the first touch electrode 410 and may be integrally formed with the first touch electrode 410, and the second connection part 422 may be located at a different layer from the second touch electrode 420.
The first insulating layer 430 is positioned between the first connection portion 412 and the second connection portion 422, and insulates the first connection portion 412 and the second connection portion 422 from each other. The first insulating layer 430 may include contact holes 435 respectively exposing adjacent first touch electrodes 410 to connect the first connection portion 412 to the first touch electrodes 410.
Referring to fig. 3, the first touch electrodes 410 of each row may be connected to the pad portions 450 of the peripheral area PA through the first touch wiring 411, and the second touch electrodes 420 of each column may be connected to the pad portions 450 of the peripheral area PA through the second touch wiring 421. Alternatively, at least a portion of the first and second touch wirings 411 and 421 may be located in the touch area TA.
The first touch electrode 410 and the second touch electrode 420 may have a predetermined transmittance or higher so that light may be transmitted. For example, the first and second touch electrodes 410 and 420 may be made of a transparent conductive material such as ITO (indium tin oxide), IZO (indium zinc oxide), a thin metal layer like silver nanowire (AgNW), a metal mesh, Carbon Nanotube (CNT), and a conductive polymer.
The first and second touch wirings 411 and 421 may include a transparent conductive material included in the first and second touch electrodes 410 and 420, and may further include a low resistance material such as molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), and molybdenum/aluminum/molybdenum (Mo/Al/Mo). Fig. 5 shows an example in which the first touch wiring 411 or the second touch wiring 421 includes a first conductive layer 411a and a second conductive layer 411b deposited in a direction parallel to the third direction Dr 3. The first conductive layer 411a may be located at the same layer as the first touch electrode 410 and may include the same material as that of the first touch electrode 410, and the second conductive layer 411b may be located on the first conductive layer 411a and may include a low resistance material such as metal.
The first touch electrode 410 and the second touch electrode 420 adjacent to each other form a mutual inductance capacitor serving as a sensor. The mutual inductance capacitor may receive a sensing input signal through one touch electrode of the first touch electrode 410 and the second touch electrode 420, and may output a change in an amount of charge due to contact of an external object as a sensing output signal through the other touch electrode.
Unlike fig. 3 and 4, the plurality of first touch electrodes 410 and the plurality of second touch electrodes 420 may be respectively connected to touch wirings (not shown). In this case, each touch electrode may form a self-inductance capacitance as a sensor. The self-inductance capacitor may be charged with a predetermined charge amount by receiving a sensing input signal, if a contact of an external object such as a finger is generated, a change in the charged charge amount is generated, and a sensing output signal different from the input sensing input signal may be output.
Referring to fig. 5, the sensor layer 400 may further include a second insulating layer 440 on the first connection portion 412.
The major surfaces of sensor layer 400 include first surface SA1 and second surface SA 2. The first surface SA1 and the second surface SA2 form surfaces of the sensor layer 400 that face each other. Among the first and second surfaces SA1 and SA2, a surface closer to the first and second touch electrodes 410 and 420 among the first connection portion 412, the first and second touch electrodes 410 and 420 is referred to as a first surface SA1, and a surface opposite thereto is referred to as a second surface SA 2. The positions of the first surface SA1 and the second surface SA2 in fig. 5 may be changed. That is, the second surface SA2 may be located in a position closer to the display panel 300 than the first surface SA 1.
Referring to fig. 5, an optical film 550 may be positioned between the sensor layer 400 and the display panel 300, and an adhesive layer 10 may be positioned between the sensor layer 400 and the optical film 550. The adhesive layer 10 may be in contact with a surface of the optical film 550.
The adhesive layer 10 may include a polymer organic material, and may be a curing type adhesive such as a thermosetting type or a UV curable type, unlike a typical adhesive which does not change the material itself but may be adhered to other materials by the adhesiveness of the adhesive itself. Thus, the adhesive layer 10 comprises a cured (or hardened) adhesive material.
The separation layer 120a may be located between the adhesive layer 10 and the sensor layer 400, or on the second surface SA2 of the sensor layer 400. Fig. 5 shows an example in which the separation layer 120a is located between the sensor layer 400 and the adhesive layer 10. In this case, the adhesive layer 10 may be directly adjacent to the separation layer 120a and in contact with the separation layer 120 a. The adhesive layer 10 may be positioned between the separation layer 120a and the optical film 550, thereby adhering the separation layer 120a and the optical film 550 to each other.
The separation layer 120a may include a polymer organic material. For example, the separation layer 120a may include at least one selected from the group consisting of polyimide, polyvinyl alcohol, polyamic acid, polyamide, polyethylene, polystyrene, polynorbornene, phenylmaleimide copolymer, polyazobenzene, polyphenylenephthalamide, polyester, polymethylmethacrylate, polyarylate, cinnamic acid-based polymer, coumarin-based polymer, phthalimide-based polymer, chalcone-based polymer, and aromatic acetylene-based polymer. The separation layer 120a may include an inorganic material in addition to the polymer organic material.
The thickness of the separation layer 120a in the third direction Dr3 may be about 1 to 100 micrometers, but is not limited thereto.
Unlike fig. 5, an optical film may be positioned on the second surface SA2 of the sensor layer 400, and the adhesive layer 10 may be positioned between the second surface SA2 and the optical film.
The optical film 550 may include at least one of a transparent film and a polarizing film. The transparent film may be an isotropic film. The polarizing film as a film for improving optical characteristics may include at least one polarizing layer and at least one phase retardation layer. The polarizing layer may include PVA (polyvinyl alcohol), and may further include at least one supporting member. The polarizing film may be a circular polarizing film, and in this case, the polarizing film may include a linear polarizing layer and a quarter-wavelength phase retardation layer.
In the case where the optical film 550 is a polarizing film, a phase retardation layer included in the polarizing film may be located between the polarizing layer and the display panel 300. That is, a polarizing layer may be located between the phase retardation layer and the sensor layer 400.
The optical film 550 may serve to prevent external light reflected from the display panel 300, electrodes or wirings included in the sensor layer 400 from being recognized. That is, light incident into the display device 1, passing through the optical film 550, being reflected by a lower electrode or wiring, and being incident again to the optical film 550 interferes destructively with light incident to the optical film 550, so that light is recognized externally.
In the manufacturing process of the optical touch film 600 according to the exemplary embodiment, after a separation layer is formed on a separation carrier substrate, the sensor layer 400 is formed on the separation layer, the sensor layer 400 is separated from the carrier substrate together with the separation layer, and the separated sensor layer 400 and the separation layer are attached to one surface of the optical film 550 by using the adhesive layer 10 to be integrated. Thus, the optical film 550 is not damaged by the process used to form the sensor layer 400.
In addition, the optical film 550 and the sensor layer 400 may have a high adhesive fixing force. Therefore, when the display device 1 is flexible, the optical film 550 and the sensor layer 400 are not separated, and thus defects are not generated.
Further, according to the conventional art, films used as a sensor layer and an optical film are separately formed and attached to the display panel, however, according to an exemplary embodiment of the present invention, since the sensor layer 400 is integrated by attaching the adhesive layer 10 on the optical film 550, one optical touch film 600 having an improved optical characteristic while having a sensing function may replace two or more conventional films. Therefore, the entire thickness of the display device 1 can be reduced, and stress at the time of deformation in the case of a flexible display device can be reduced.
In addition, the optical touch film 600 having a plurality of functions such as a sensing function and an optical characteristic improving function includes only one film, so that film cost can be reduced and manufacturing cost of the display device can be reduced. In addition, the number of films positioned on the display panel 300 may be minimized, so that the transmittance of an image displayed by the display panel 300 may be increased and color variation may be minimized.
Referring again to fig. 1, the controller 700 may control the operations of the display panel 300 and the optical touch film 600. In detail, the controller 700 may receive an input image signal from the outside and may apply a signal to the display panel 300 based on the input image signal. The controller 700 may be connected to the sensors of the optical touch film 600 to control the operation of the sensors. That is, the controller 700 may transmit a sensing input signal to the sensor, or may receive a sensing output signal to be processed, thereby generating contact information such as contact presence and contact position.
The controller 700 may be directly mounted on the display panel 300 or the optical touch film 600 in the form of at least one IC chip, mounted on a flexible printed circuit film (not shown) in the form of a Tape Carrier Package (TCP) to be attached to the display panel 300 or the optical touch film 600, or mounted on a separate printed circuit board (not shown).
Next, a method of manufacturing a display device according to an exemplary embodiment will be described with reference to fig. 6 and 7 and the above-described drawings.
Fig. 6 and 7 are cross-sectional views of an intermediate product in an intermediate step of a process according to a method for manufacturing an optical touch film according to an exemplary embodiment, respectively.
First, referring to fig. 6, a polymer organic material is coated on a carrier substrate 110 to form a separation layer 120. The carrier substrate 110 may include glass.
Next, the first and second touch electrodes 410 and 420, the first and second touch wirings 411 and 421, and the first connection portion 412 are formed on the separation layer 120. In detail, a first conductive layer (not shown) including a transparent conductive material such as ITO and IZO and a second conductive layer (not shown) including a low resistance material such as metal are sequentially deposited on the separation layer 120 and patterned. Next, portions of the second conductive layer other than the first touch wiring 411 and the second touch wiring 421 are removed to form the first touch wiring 411 and the second touch wiring 421 including the first conductive layer 411a and the second conductive layer 411b, and a plurality of first touch electrodes 410, a plurality of second touch electrodes 420, and a plurality of second connection portions 422 are formed. Next, an insulating material is deposited on the first touch electrode 410, the second touch electrode 420, the second connection portion 422, and the first and second touch wirings 411 and 421, and the insulating material is patterned to form a first insulating layer 430 having a contact hole 435. A conductive material is then deposited on the first insulating layer 430 and patterned to form the first connection portion 412. Next, an insulating material is deposited on the first connection portion 412 and the first insulating layer 430 to form a second insulating layer 440.
Unlike fig. 6, vertical deposition positions of the first and second touch electrodes 410 and 420 and the first connection portion 412 may be changed.
Next, referring to fig. 7, after the sensor layer 400 is formed, the separation layer 120 is peeled off and separated from the carrier substrate 110 together with the sensor layer 400. As the peeling method, a roll to roll peeling (roll peeling) method can be used.
The separation layer 120a may be located below the first surface SA1 of the separated sensor layer 400. The separation layer 120a may substantially comprise a majority of the separation layer 120 prior to separation. Accordingly, the thickness of the separation layer 120a in the third direction Dr3 may be substantially equal to or slightly less than the thickness of the separation layer 120 before separation in the third direction Dr 3.
Next, referring to fig. 5, an adhesive material is coated at a lower surface of the separation layer 120a and an upper surface of the sensor layer 400 positioned under the separated sensor layer 400 to form an adhesive layer 10, the optical film 550 and the sensor layer 400 are attached through the adhesive layer 10, and the adhesive layer 10 is cured (or hardened) through thermal curing (or hardening) or UV curing (or hardening), thereby integrating the sensor layer 400 and the optical film 550. Thus, the optical touch film 600 according to an exemplary embodiment may be completed.
According to the method of manufacturing the display device of the exemplary embodiment of the present invention, the sensor layer 400 is separately formed on the carrier substrate 110 and separated to be attached to the optical film 550, so that the optical film 550 is not damaged by heating in the manufacturing process of the sensor layer 400, and the optical film 550 and the sensor layer 400 may have high adhesiveness. In addition, the optical touch film 600 having a plurality of functions such as a sensing function and an optical characteristic improving function includes only one film, so that film cost can be reduced, thereby reducing manufacturing cost of the display device and thickness of the display device.
Next, an optical touch film included in a display device according to an exemplary embodiment of the present invention will be described with reference to fig. 8 to 14 and the above-described drawings.
Fig. 8 to 14 are sectional views of an optical touch film included in a display device according to an exemplary embodiment.
First, referring to fig. 8, the optical touch film 600a included in the display device according to the present exemplary embodiment is almost the same as the optical touch film 600 according to the above exemplary embodiment, however, the sensor layer 400 may be positioned between the optical film 500 and the display panel 300. The optical film 500 is substantially the same as the optical film 550 described above. In the case where the optical film 500 is a polarizing film, a phase retardation layer included in the polarizing film may be located between the polarizing layer and the sensor layer 400. The optical film 500 may be positioned on the first surface SA1 of the sensor layer 400, and the adhesive layer 10 and the separation layer 120a may be positioned between the first surface SA1 and the optical film 500.
According to the present exemplary embodiment, since the optical film 500 is located at a more upward position than the sensor layer 400, it is possible to effectively prevent external light reflected by the electrodes or the wirings included in the sensor layer 400 from being recognized due to the optical film 500.
Next, referring to fig. 9, the optical touch film 600b included in the display device according to the present exemplary embodiment is almost the same as the optical touch film 600a according to the above-described exemplary embodiment of fig. 8, however, the vertical direction of the sensor layer 400 may be different. That is, the display panel 300 may be positioned under the first surface SA1 of the sensor layer 400, and the optical film 500 may be positioned on the second surface SA 2. In addition, the separation layer 120a is not in contact with the adhesive layer 10, but may be located between the display panel 300 and the sensor layer 400.
Next, referring to fig. 10, an optical touch film 600c included in the display device according to the present exemplary embodiment is almost the same as the optical touch film 600a according to the above-described exemplary embodiment of fig. 8 except for the structure of the sensor layer 400 a. In detail, the first connection portion 412a may be positioned under the separation layer 120a, the first insulating layer 430 having the contact hole 435 may be positioned under the first connection portion 412a, the first and second touch electrodes 410a and 420 and the first and second touch wirings 411 and 421 may be positioned under the first insulating layer 430, and the second insulating layer 440 may be positioned under the first and second touch electrodes 410a and 420 and the first and second touch wirings 411 and 421. In this case, a main surface of the sensor layer 400a closer to the first and second touch electrodes 410a and 420 than the first connection portion 412a is referred to as a first surface SA1, and a surface of the opposite side is referred to as a second surface SA 2.
Next, referring to fig. 11 to 31, the optical touch film included in the display device according to the current exemplary embodiment is almost the same as the optical touch films 600, 600a, 600b, and 600c according to the several exemplary embodiments described above, except for at least one high-refractive insulating layer included in the sensor layer 400 or located around the sensor layer 400. In particular, at least one high refractive insulating layer may be disposed at a layer adjacent to and in contact with first touch electrode 410 and second touch electrode 420 forming a sensor. Fig. 11 shows an example in which a high-refractive insulating layer 450M is located at a layer between the first and second touch electrodes 410 and 420 and the separation layer 120 a.
The high-refractive insulating layer 450M may be an index matching layer to reduce total reflection and smooth pattern reflection of the sensor layer 400b, and to reduce transmittance by smoothing refraction of light from the surfaces of the first and second touch electrodes 410 and 420. Accordingly, the refractive index of the high-refractive insulating layer 450M may have a high refractive index close to the refractive index of the first and second touch electrodes 410 and 420. The refractive index of the high-refractive insulating layer 450M may be greater than about 1.5, and in detail, may be in a range of about 1.6 to about 2.0. In an exemplary embodiment, the high-refractive insulating layer 450M may have a refractive index higher than that of any insulating layer (e.g., the separation layer 120a or the second insulating layer 440) except for conductive layers such as the first and second touch electrodes 410 and 420 and the first connection portion 412 among the layers constituting the optical touch film 600 d. That is, among the insulating layers (e.g., the separation layer 120a or the second insulating layer 440), the refractive index of the high-refractive insulating layer 450M may be closest to the refractive indices of the first and second touch electrodes 410 and 420.
In the case where the first and second touch electrodes 410 and 420 include Indium Tin Oxide (ITO), when the high-refractive insulating layer 450M having a refractive index similar to that of the first and second touch electrodes 410 and 420 according to the present embodiment is disposed to contact the first and second touch electrodes 410 and 420, since the refractive index of ITO is approximately in the range of about 1.7 to about 1.9, total reflection may be reduced and pattern reflection of the sensor layer 400b and a reduction in transmittance may be prevented. The separation layer 120a may have a refractive index lower than that of the high-refractive insulating layer 450M, and may be, for example, equal to or less than about 1.5. Similarly, the refractive index of the second insulating layer 440 may be lower than that of the high-refractive insulating layer 450M, and for example, may be equal to or less than about 1.5.
In addition, the high refractive insulating layer 450M positioned to be in contact with the first and second touch electrodes 410 and 420 enhances the film quality of the first and second touch electrodes 410 and 420, so that it is possible to prevent defects such as cracks from occurring in the first and second touch electrodes 410 and 420. In particular, when the optical touch film 600d is attached to a flexible display device and bent or curved, the first and second touch electrodes 410 and 420 formed of ITO or the like may be broken. Even in this case, since the high-refractive insulating layer 450M is disposed to contact the first and second touch electrodes 410 and 420, the occurrence of defects such as cracks may be prevented.
The high refractive insulating layer 450M may be a coating type insulating layer formed by a coating method, and may include an organic material (e.g., a polymer organic material), and may further include nanoparticles. The nanoparticles may comprise, for example, zirconium dioxide (ZrO)2) Silicon dioxide (SiO)2) And the like.
According to another exemplary embodiment, the high refractive insulating layer 450M may include various high refractive index polymers (HIRP) or inorganic thin films.
The high refractive insulating layer 450M may be formed by a coating method in the formation process of the sensor layer 400 b.
The thickness of the high refractive insulating layer 450M in the third direction Dr3 may be in a range of about several nanometers to about several micrometers, for example, may be in a range of about 1 nanometer to about 10 micrometers. However, the thickness of the high-refractive insulating layer 450M may vary according to the thickness and/or characteristics of the layers included in the first and second touch electrodes 410 and 420.
In an embodiment, the separation layer 120a, the optical film 550, and the display panel 300 may be sequentially disposed on the first surface SA1 side of the sensor layer 400 b. The optical film 550 may be an isotropic film. The adhesive layer 5 may be positioned between the display panel 300 and the optical film 550. The adhesive layer 5 may comprise, for example, a Pressure Sensitive Adhesive (PSA) material, and may be capable of separating after having been bonded depending on environmental conditions. The optical film 500 may be adhered to the sensor layer 400b by an adhesive layer 15. The adhesive layer 15 may have the same properties as those of the adhesive layer 5 described above. The optical film 500 may be a polarizing film. In addition, the adhesive layer 10 may be in contact with the separation layer 120a, and the high-refractive insulating layer 450M may be in contact with the separation layer 120 a.
Next, referring to fig. 12, the optical touch film 600e of the present embodiment is almost the same as the optical touch film 600d according to the embodiment of fig. 11 described above, however, the sensor layer 400c may include a high-refractive insulating layer 430M instead of the high-refractive insulating layer 450M, and the high-refractive insulating layer 430M may be disposed between the first and second touch electrodes 410 and 420 and the first connection portion 412. In this case, a part or all of the first insulating layer 430 may be omitted, and the high-refractive insulating layer 430M may be disposed in a position where the first insulating layer 430 is omitted. The characteristics and effects of the high-refractive insulating layer 430M may be the same as those of the high-refractive insulating layer 450M described above.
Next, referring to fig. 13, the optical touch film 600f of the present embodiment is substantially the same as the optical touch film 600d according to the embodiment of fig. 11 described above, however, the sensor layer 400d may include a high-refractive insulating layer 440M instead of the high-refractive insulating layer 450M, and the high-refractive insulating layer 440M may be disposed in a layer on the first connection portion 412. In this case, a part or all of the second insulating layer 440 may be omitted, and the high-refractive insulating layer 440M may be disposed in a position where the second insulating layer 440 is omitted. The characteristics and effects of the high-refractive insulating layer 440M may be the same as those of the high-refractive insulating layer 450M described above.
Next, referring to fig. 14, the optical touch film 600g included in the display device according to the present embodiment is substantially the same as the optical touch film 600d according to the embodiment of fig. 11 described above, however, the optical film 550 and the adhesive layer 5 between the display panel 300 and the sensor layer 400b may be omitted.
Next, referring to fig. 15, the optical touch film 600h included in the display device according to the present embodiment is substantially the same as the optical touch film 600e according to the embodiment of fig. 12 described above, however, the optical film 550 and the adhesive layer 5 between the display panel 300 and the sensor layer 400c may be omitted.
Next, referring to fig. 16, the optical touch film 600i included in the display device according to the present embodiment is substantially the same as the optical touch film 600f according to the embodiment of fig. 13 described above, however, the optical film 550 and the adhesive layer 5 between the display panel 300 and the sensor layer 400d may be omitted.
Next, referring to fig. 17, an optical touch film 600j included in the display device according to the present embodiment is substantially the same as the optical touch film 600h according to the embodiment of fig. 15 described above, however, a curing type adhesive layer 10 including a polymer organic material may be disposed between the sensor layer 400c and the optical film 500, and an adhesive layer 20 may be disposed between the separation layer 120a and the display panel 300. The adhesive layer 20 may have the same properties as those of the adhesive layer 5 described above.
Next, referring to fig. 18, the optical touch film 600k of the present embodiment is almost the same as the optical touch film 600e according to the embodiment shown in fig. 12 described above, however, the sensor layer 400e may have the same structure as the sensor layer 400a shown in fig. 10 described above. That is, the top and bottom positions of the first and second surfaces SA1 and SA2 may be changed. More specifically, the first connection portion 412 and the first and second contact wirings 411 and 421 may be disposed on the separation layer 120a, the first and second touch electrodes 410 and 420 may be disposed on the first connection portion 412 and the first and second contact wirings 411 and 421, and the second insulating layer 440 may be disposed on the first and second touch electrodes 410 and 420. The first contact wiring 411 and the second contact wiring 421 may include a first conductive layer 411a and a second conductive layer 411 b. The first conductive layer 411a may be disposed in the same layer as the first connection portion 412 and include the same material as that of the first connection portion 412. The second conductive layer 411b may be disposed on the first conductive layer 411a, and may include a low-resistance material such as metal.
The present embodiment shows an example in which the high-refractive insulating layer 430M is disposed between the first connection portion 412 and the second connection portion 422 as an example including at least one high-refractive insulating layer. The high refractive insulating layer 430M may be disposed in a layer in contact with the first and second touch electrodes 410 and 420. The high-refractive insulating layer 430M may have a contact hole 435M on the first connection portion 412. In addition, the characteristics and effects of the high-refractive insulating layer 430M are almost the same as those of the various high-refractive insulating layers described above, and thus a detailed description thereof will be omitted.
Next, referring to fig. 19, the optical touch film 600l according to the present embodiment is substantially the same as the optical touch film 600k according to the embodiment of fig. 18 described above, however, the sensor layer 400f may include a high-refractive insulating layer 440M instead of the high-refractive insulating layer 430M, and the high-refractive insulating layer 440M may be disposed between the first and second touch electrodes 410 and 420 and the optical film 500. The high refractive insulating layer 440M may be disposed in a layer in contact with the first and second touch electrodes 410 and 420. In this case, a part or all of the second insulating layer 440 may be omitted, and the high-refractive insulating layer 440M may be disposed in a position where the second insulating layer 440 is omitted.
Next, referring to fig. 20, the optical touch film 600M included in the display device according to the present embodiment is substantially the same as the optical touch film 600l according to the embodiment of fig. 19 described above, however, the sensor layer 400g may include a first insulating layer 430 and a high refractive insulating layer 433M, and the first insulating layer 430 and the high refractive insulating layer 433M may be disposed between the first connection portion 412 and the second connection portion 422. The contact hole 435Ma may be formed through the high-refractive insulating layer 433M and the first insulating layer 430 to expose a portion of the first connection portion 412. The high refractive insulating layer 433M may be disposed in a layer in contact with the first and second touch electrodes 410 and 420. That is, the high refractive insulating layer 433M, the first insulating layer 430, and the first connection portion 412 may be sequentially disposed under the first and second touch electrodes 410 and 420. In addition, the optical film 550 may be disposed between the separation layer 120a and the display panel 300, and the adhesive layer 10 may be disposed between the optical film 550 and the separation layer 120 a. The adhesive layer 20 may be disposed between the optical film 550 and the display panel 300. The optical film 550 may be an isotropic film.
The optical film 550 and the adhesive layer 10 between the sensor layer 400 and the display panel 300 may be omitted.
Next, referring to fig. 21, the optical touch film 600n according to the present embodiment is substantially the same as the optical touch film according to various embodiments described above, however, a sensor layer 400b may be disposed on the display panel 300, a separation layer 120a may be disposed on the sensor layer 400b, and an optical film 500 may be disposed on the separation layer 120 a. The optical film 500 may be a polarizing film, and the adhesive layer 10 may be disposed between the optical film 500 and the separation layer 120 a. The adhesive layer 20 may be disposed between the sensor layer 400b and the display panel 300. In addition, the high refractive insulating layer 450M may be disposed between the first and second touch electrodes 410 and 420 and the adhesive layer 10.
Next, referring to fig. 22, the optical touch film 600o included in the display device according to the present embodiment is substantially the same as the optical touch film 600n according to the embodiment of fig. 21 described above, however, the sensor layer 400c may include a high-refractive insulating layer 430M instead of the high-refractive insulating layer 450M, and the high-refractive insulating layer 430M may be disposed between the first and second touch electrodes 410 and 420 and the first connection portion 412. In this case, a part or all of the first insulating layer 430 may be omitted, and the high-refractive insulating layer 430M may be disposed in a position where the first insulating layer 430 is omitted.
Next, referring to fig. 23, the optical touch film 600p included in the display device according to the present embodiment is substantially the same as the optical touch film 600o according to the embodiment of fig. 22 described above, however, the sensor layer 400h may include a high-refractive insulating layer 431M and a first insulating layer 430 instead of the high-refractive insulating layer 430M, and the high-refractive insulating layer 431M and the first insulating layer 430 may be disposed between the first and second touch electrodes 410 and 420 and the first connection portion 412. The high refractive insulating layer 431M may be disposed between the first insulating layer 430 and the first and second touch electrodes 410 and 420 to contact the first and second touch electrodes 410 and 420. A contact hole 435Mb may be formed in the high-refractive insulating layer 431M and the first insulating layer 430 to expose a portion of the first touch electrode 410.
Next, referring to fig. 24, the optical touch film 600q included in the display device according to the present embodiment is substantially the same as the optical touch film 600o according to the embodiment of fig. 22 described above, however, the optical film 550 may be disposed between the display panel 300 and the sensor layer 400 c. The adhesive layer 5 may be disposed between the optical film 550 and the display panel 300, and the adhesive layer 10 may be disposed between the optical film 550 and the sensor layer 400 c. The optical film 550 may be an isotropic film. Further, an adhesive layer 15 instead of the adhesive layer 10 may be disposed between the optical film 500 and the sensor layer 400 c.
Next, referring to fig. 25, the optical touch film 600r included in the display device according to the present embodiment is substantially the same as the optical touch film 600l according to the embodiment of fig. 19 described above, however, an adhesive layer 20 instead of the adhesive layer 10 may be disposed between the display panel 300 and the separation layer 120 a. Further, the adhesive layer 10 instead of the adhesive layer 15 may be disposed between the sensor layer 400f and the optical film 500.
Next, referring to fig. 26, the optical touch film 600s included in the display device according to the present embodiment is substantially the same as the optical touch film 600k according to the embodiment of fig. 18 described above, however, an adhesive layer 20 instead of the adhesive layer 10 may be disposed between the display panel 300 and the separation layer 120 a. Further, an adhesive layer 10 instead of the adhesive layer 15 may be provided between the sensor layer 400e and the optical film 500.
Next, referring to fig. 27, the optical touch film 600t of the present embodiment is almost the same as the optical touch film 600r according to the embodiment shown in fig. 25 described above, however, the sensor layer 400f may have the same structure as the structure of the sensor layer 400a shown in fig. 10 described above. That is, the top and bottom positions of the first and second surfaces SA1 and SA2 may be changed. Specifically, the first connection portion 412 and the first and second touch wirings 411 and 421 may be disposed under the separation layer 120a, the first insulating layer 430 may be disposed under the first connection portion 412 and the first and second touch wirings 411 and 421, and the first and second touch electrodes 410 and 420 may be disposed under the first insulating layer 430. The first and second touch wirings 411 and 421 may include a first conductive layer 411a and a second conductive layer 411 b. The first conductive layer 411a may be disposed in the same layer as the first connection portion 412 and include the same material as that of the first connection portion 412. The second conductive layer 411b may be disposed under the first conductive layer 411a, and may include a low-resistance material such as metal. The high refractive insulating layer 440M may be disposed under the first and second touch electrodes 410 and 420. The high refractive insulating layer 440M may be in contact with the first touch electrode 410 and the second touch electrode 420.
Next, referring to fig. 28, the optical touch film 600u of the present embodiment is almost the same as the optical touch film 600t according to the embodiment shown in fig. 27 described above, however, the sensor layer 400i may include a high-refractive insulating layer 441M and a second insulating layer 440, and the high-refractive insulating layer 441M and the second insulating layer 440 may be disposed under the first touch electrode 410 and the second touch electrode 420. High-refractive insulating layer 441M may be disposed between second insulating layer 440 and first and second touch electrodes 410 and 420.
Next, referring to fig. 29, the optical touch film 600v of the present embodiment is almost the same as the optical touch film 600t according to the embodiment shown in fig. 27 described above, however, the sensor layer 400e may include the high-refractive insulating layer 430M instead of the high-refractive insulating layer 440M. The high refractive insulating layer 430M may be disposed between the first connection portion 412 and the first and second touch electrodes 410 and 420, and may contact the first and second touch electrodes 410 and 420.
Next, referring to fig. 30, the optical touch film 600w of the present embodiment is substantially the same as the optical touch film 600n according to the embodiment shown in fig. 21 described above, however, the sensor layer 400d may include a high-refractive insulating layer 440M instead of the high-refractive insulating layer 450M. The high-refractive insulating layer 440M may be disposed under the first connection portion 412.
Next, referring to fig. 31, the optical touch film 600x of the present embodiment is almost the same as the optical touch film 600w according to the embodiment shown in fig. 30 described above, however, the sensor layer 400j may include a high-refractive insulating layer 460M instead of the high-refractive insulating layer 440M. The second insulating layer 440 may be disposed under the first connection portion 412, and the high-refractive insulating layer 460M may be disposed under the second insulating layer 440.
While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (24)
1. An optical touch film, comprising:
a sensor layer including a plurality of touch electrodes for forming a sensor and a connection portion connecting two adjacent touch electrodes among the plurality of touch electrodes and located at a different layer from the plurality of touch electrodes;
an optical film;
a curable adhesive layer between the sensor layer and the optical film;
a separation layer on one surface of the sensor layer, in contact with the plurality of touch electrodes, and including a polymer organic material;
a first insulating layer disposed between the plurality of touch electrodes and the connection portion and having a refractive index higher than that of the separation layer; and
a second insulating layer disposed between and in contact with the connection portion and the curing type adhesive layer.
2. The optical touch film of claim 1,
the first insulating layer has a refractive index higher than that of the second insulating layer.
3. The optical touch film of claim 1,
the first insulating layer is located between the plurality of touch electrodes and the curing type adhesive layer.
4. The optical touch film of claim 1, further comprising:
a third insulating layer in contact with the first insulating layer,
wherein the first insulating layer is disposed at a layer between the third insulating layer and the plurality of touch electrodes.
5. The optical touch film of claim 1,
the first insulating layer includes an organic material.
6. The optical touch film of claim 5,
the first insulating layer further includes nanoparticles.
7. The optical touch film of claim 1,
the first insulating layer has a refractive index closer to that of the plurality of touch electrodes than that of the separation layer.
8. The optical touch film of claim 1,
the first insulating layer has a refractive index in a range of 1.6 to 2.0.
9. A display device, the display device comprising:
a display panel;
a sensor layer including a plurality of touch electrodes for forming a sensor;
an optical film;
a curable adhesive layer between the sensor layer and the optical film or between the display panel and the sensor layer;
a separation layer on a surface of the sensor layer and comprising a polymeric organic material; and
a high-refractive insulating layer disposed at a layer in contact with the plurality of touch electrodes and having a refractive index higher than that of the separation layer,
wherein the release layer is adjacent to and in contact with the curable adhesive layer, and
the curable adhesive layer is disposed between the separation layer and the optical film or between the separation layer and the display panel.
10. The display device according to claim 9,
the high refractive insulating layer is included in the sensor layer.
11. The display device according to claim 10,
the sensor layer further includes a connection portion connecting two adjacent touch electrodes of the plurality of touch electrodes and located at a different layer from the plurality of touch electrodes,
the high-refractive insulating layer is located between the plurality of touch electrodes and the connection portion.
12. The display device according to claim 10,
the high-refraction insulating layer is located between the plurality of touch electrodes and the curing type adhesive layer.
13. The display device according to claim 12,
the separation layer is provided between the high-refraction insulating layer and the curable adhesive layer.
14. The display device according to claim 10,
the sensor layer further includes:
a connection portion connecting two adjacent touch electrodes of the plurality of touch electrodes and disposed at a different layer from the plurality of touch electrodes;
a first insulating layer disposed between the plurality of touch electrodes and the connection portion,
the plurality of touch electrodes are disposed at a layer between the high-refractive insulating layer and the first insulating layer.
15. The display device according to claim 14,
the connecting portion contacts the separation layer.
16. The display device according to claim 15,
the separation layer is disposed between the curing-type adhesive layer and the connection portion.
17. The display device according to claim 14, further comprising:
a second insulating layer in contact with the high refractive insulating layer,
wherein the high-refractive insulating layer is disposed at a layer between the second insulating layer and the plurality of touch electrodes.
18. The display device according to claim 9,
the high refractive insulating layer includes an organic material.
19. The display device according to claim 18,
the high refractive insulating layer further includes nanoparticles.
20. The display device according to claim 9,
the sensor layer is located between the display panel and the optical film.
21. The display device according to claim 9,
the high-refractive insulating layer has a refractive index closer to that of the plurality of touch electrodes than that of the separation layer.
22. The display device according to claim 9,
the high refractive insulating layer has a refractive index in a range of 1.6 to 2.0.
23. A method for manufacturing a display device, the method comprising:
coating a separating layer comprising a polymeric organic material on a carrier substrate;
forming a sensor layer including a plurality of touch electrodes and a high-refractive insulating layer in contact with the plurality of touch electrodes and having a refractive index greater than that of the separation layer on the separation layer;
separating the sensor layer and the separation layer from the carrier substrate;
disposing an adhesive layer between the sensor layer and the optical film, and curing the adhesive layer,
wherein the separation layer is adjacent to and in contact with the adhesive layer, and
the adhesive layer is disposed between the separation layer and the optical film.
24. The method of claim 23, wherein,
the high-refractive insulating layer is located between the plurality of touch electrodes and the adhesive layer.
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KR1020170066929A KR102363290B1 (en) | 2016-06-13 | 2017-05-30 | Optical touch film, display devcie including the same, and manufacturing method thereof |
KR10-2017-0066929 | 2017-05-30 |
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CN104679369A (en) * | 2013-12-02 | 2015-06-03 | 三星显示有限公司 | Flexible display device including touch sensor |
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