KR102153975B1 - Touch Screen Bonding Element and Manufacturing Method of Touch Screen Display Panel using the same - Google Patents

Abstract

The present invention relates to a touch screen bonding member and a method of manufacturing a touch screen display panel using the same, wherein a certain erasure region is formed on one of the protective films on both sides of the touch electrode layer of the touch screen bonding member, which is an intermediate component forming the touch screen display panel. By doing so, by making the initial peeling position P1 to which the initial peeling force of the protective film is applied and the peeling position P2 of the remaining protective film and the touch electrode layer are different, there is an effect of minimizing the occurrence of peeling defects.

Description

Touch Screen Bonding Element and Manufacturing Method of Touch Screen Display Panel using the same}

The present invention relates to a touch screen display device, and more particularly, to a touch screen bonding member and a method of manufacturing a touch screen display panel using the same.

As the information society develops, demands for display devices for displaying images are increasing in various forms, and in recent years, liquid crystal displays (LCDs), plasma display panels (PDPs), organic electric fields Various display devices such as an OLED (Organic Light Emitting Diode Display Device) are being used.

In addition, the display panel of such a display device is generally provided with a touch function that senses an input such as a user's finger, and the display panel having such a touch function is manufactured by separately manufacturing a touch screen panel (TSP). A type installed on a display panel such as an LCD or OLED, and a touch-integrated display panel in which a touch electrode required for touch recognition is included in the display panel when the display panel is manufactured are being developed.

Among them, the type in which the touch screen panel is separately stacked on a display panel such as LCD or OLED can be called an on-cell method. The touch screen panel has the uppermost window where the finger touches again, and the touch sensing electrode layer formed under it. Including, such a touch screen panel is laminated on a display panel such as an LCD or OLED, thereby forming a final touch screen display panel.

Meanwhile, the touch screen panel includes a flexible printed circuit board (FPCB) in order to connect each touch electrode of the touch sensing electrode layer with an external control unit, and at least one protective film is formed on the upper and lower portions of the touch sensing electrode layer. After removing or peeling off the protective film of the touch screen bonding member (TSB), a transparent window is laminated on the upper side, and the final touch screen display panel is attached to the lower display panel. Is manufactured.

In this case, in the touch screen bonding member, which is an intermediate component for manufacturing the touch screen display panel, protective films are formed on the upper and lower portions respectively to protect the intermediate touch electrode layer, and after peeling the upper protective film, A transparent window is attached to the panel, and after peeling/removing the lower protective film, it is attached to the upper panel of the display panel.

Meanwhile, in the process of first peeling off one of the upper and lower protective films of the touch screen bonding member, not only the corresponding protective film is peeled off, but the touch electrode layer is peeled together, or a part of the touch electrode layer is separated from the remaining protective film layers, and then again. As a result of adhesion, problems such as generation of air bubbles occur.

Against this background, an object of the present invention is to provide a touch screen bonding member capable of preventing a defective peeling of a protective film.

Another object of the present invention is to provide a structure and method capable of minimizing the occurrence of peeling defects in the process of peeling one of the protective films in a touch screen bonding member including a protective film on both sides of the touch electrode layer.

Another object of the present invention is to form a certain erasing area on one of the protective films on both sides of the touch screen bonding, so that the position where the initial peeling force of the protective film is applied and the peeling position of the remaining protective film and the touch electrode layer are different, It is to provide a structure and method for minimizing the occurrence of peeling defects.

In order to achieve the above object, an embodiment of the present invention is a touch screen bonding member used to form a touch screen display panel by attaching a display panel and a transparent window to both sides, comprising a touch electrode layer and an upper portion of the touch electrode layer. It is formed and includes an upper protective film peeled off for attachment of the transparent window, and a lower protective film formed under the touch electrode layer and peeled off for attachment to the display panel, one of the upper protective film and the lower protective film A touch screen bonding member including a deletion region from which a partial region of the protective film has been deleted is provided in an edge region of

In another embodiment of the present invention, a method for manufacturing a touch screen display panel using a touch screen bonding member including a touch electrode layer and an upper protective film and a lower protective film respectively formed on the upper and lower portions thereof, wherein some areas of the upper or lower protective films are A first step of mounting the touch screen bonding member on the TSB peeling stage so that the first protective film including the removed deletion region faces upward, and the first protective film is peeled off using the vicinity of the deletion region as an initial peeling position. A second step of attaching one of a transparent window or a display panel to the exfoliated surface, and a first protective film having no erasure area among the upper or lower protective films is peeled off, and the display panel or It provides a method for manufacturing a touch screen display panel including a fourth step of attaching a transparent window.

As described above, according to the present invention, it is possible to provide a touch screen bonding member capable of preventing a defective peeling of a protective film, and more specifically, in a touch screen bonding member including a protective film on both sides of the touch electrode layer, the protective film There is an effect of minimizing the occurrence of peeling defects in the process of peeling one of them.

In addition, according to an embodiment of the present invention, in the touch screen bonding member, which is an intermediate component forming the touch screen display panel, by forming a certain erasure region on one of the protective films on both sides of the touch electrode layer, the protective film is It is to provide a structure and method for minimizing the occurrence of peeling defects by making the position to which the initial peeling force is applied and the peeling position of the remaining protective film and the touch electrode layer.

In addition, according to an embodiment of the present invention, in the process of peeling one of the protective films on both sides of the touch screen bonding member in order to laminate a transparent window on the top or attach a display panel on the bottom, the protective film is first peeled off. Manufacture of a touch screen display panel capable of preventing defects in peeling by forming only the first protective film to be peeled off while preventing separation of the second protective film and the touch electrode layer to be peeled later by forming a deletion area in a partial area of the first protective film to be peeled off There is an effect that can provide a method.

1 illustrates an example of a plan view and a cross-sectional structure of a touch screen display panel to which an embodiment of the present invention is applied.
2 illustrates a state in which a peeling defect may occur as an embodiment of a touch screen bonding member.
FIG. 3 shows examples of peeling defects occurring in a process of peeling the protective film of the touch screen bonding member as shown in FIG. 2.
4 shows a touch screen bonding member according to an embodiment of the present invention, FIG. 4 (a) is a partial plan view, FIG. 4 (b) is a cross-sectional view, and FIG. 4 (c) is an enlarged area of a deletion area. Is also.
5 is a detailed cross-sectional view of a touch screen bonding member according to an embodiment of the present invention.
6 shows a touch screen bonding member according to another embodiment of the present invention.
7 is a diagram illustrating a principle of minimizing peeling defects in a touch screen bonding member according to an embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing a touch screen display panel according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to elements of each drawing, the same elements may have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof may be omitted.

In addition, in describing the constituent elements of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but other components between each component It is to be understood that is "interposed", or that each component may be "connected", "coupled" or "connected" through other components.

1 illustrates an example of a plan view and a cross-sectional structure of a touch screen display panel to which an embodiment of the present invention is applied.

FIG. 1(a) is a plan view of a touch screen display panel or a touch screen bonding member, and FIG. 1(b) is a cross-sectional view taken along line A-A' of (a).

As shown in (a) of FIG. 1, in the touch screen display panel, a transparent window 200 is stacked on an upper portion of a touch screen bonding member (TSB) 100 including a touch electrode portion and an FPCB 110, and an LCD Alternatively, it may be formed by attaching a display panel such as an OLED, and such a touch screen bonding member generally has one or more protective films formed on the upper and lower portions of the touch sensing electrode layer.

In addition, the touch screen bonding member TSB includes an FPCB pad unit 120 including various terminals connected to the FPCB.

Meanwhile, as shown in (b) of FIG. 1, when viewed in cross section, the touch screen display panel has a first adhesive layer 130 under a transparent window 200, and an upper electrode layer ITO 140 and a second adhesive layer under the transparent window 200. In general, the structure of the lower electrode layer 160 is 150, and a display panel 300 such as an LCD or OLED is attached thereto.

The first and second adhesive layers 130 and 150 may be formed of an optically clear adhesive (hereinafter referred to as'OCA') film or an OCA layer, and the upper electrode layer 140 includes a receiving electrode or an Rx electrode portion as a sensing electrode. It may be configured, and may include a transparent electrode film and a transparent electrode pattern formed thereon.

In addition, the lower electrode layer 160 may be a transmission electrode or a Tx electrode portion that is a driving electrode, and similarly, may be formed of an electrode pattern made of a transparent conductive material such as ITO and a film.

2 illustrates a state in which a peeling defect may occur as an embodiment of a touch screen bonding member.

As shown in FIGS. 2A and 2B, the touch screen bonding member 100 generally includes an upper protective film 160 at the upper portion and a lower protective film 180 at the lower portion to protect the middle touch electrode layer 170. ).

The upper and lower protective films 160 and 180 of the touch screen bonding member 100 are for protecting the touch electrode layer formed in the middle in the manufacturing process, and are sequentially peeled off in the manufacturing process of the touch screen display panel.

More specifically, as shown in FIG. 2 (c), the touch screen bonding member is mounted on the TSB peeling stage 191 in a state including the upper and lower protective films, and the peeling roller 192 is at one edge of the touch screen bonding member. The upper protective film peeling process is performed in which the upper protective film 160 is rolled up and peeled while proceeding in one direction after entering the initial peeling position and contacting the upper protective film 160.

After peeling off the upper protective film, a transparent window (200 in FIG. 1) may be laminated on the touch electrode layer.

Next, as a similar process, the lower protective film is peeled from the touch screen bonding member (hereinafter, referred to as “TSB”) through a lower protective film peeling process, and then the display panel is attached to the surface. That is, by mounting an upper substrate of an LCD or OLED or a protective substrate on the surface from which the lower protective film is peeled off, a final touch screen display panel can be manufactured.

3 shows examples of peeling defects occurring in the process of peeling the protective film of TSB as shown in FIG. 2.

As described in FIG. 2, in the process of peeling the upper or lower protective film of the TSB, various peeling defects may occur. FIG. 3(a) is a whole peeling phenomenon, and FIG. 3(b) is a lifting phenomenon. Shows.

As shown in (a) of FIG. 3, the moment the peeling roller 192 enters one edge of the TSB and rolls up the upper protective film 160, only the upper protective film is not separated from the touch electrode layer 170, but Only the protective film remains on the TSB peeling stage, and a so-called “whole peeling” or “back peeling” phenomenon may occur in which the upper protective film and the touch electrode layer are peeled together.

When a peeling failure such as a whole peeling occurs, only the lower protective film 180 remains, as shown in the right drawing of FIG. 3A, and thus the corresponding TSB is no longer available.

In addition, as shown in (b) of FIG. 3, when the peeling roller 192 enters one edge of the TSB to roll up the upper protective film 160, the touch electrode layer 170 was separated from the lower protective film 180. In this process, after the upper protective film 160 is peeled off, some areas between the touch electrode layer 170 and the lower protective film 180 may be lifted or wrinkled. have.

Due to such a lifting phenomenon, foreign matter may flow in, bubbles may be generated, or damage to the touch electrode layer may occur. Accordingly, there is a possibility that a contact defect or other operational defect may occur in the process of being attached to the display panel later.

An embodiment of the present invention has been proposed to solve this problem, and in an embodiment of the present invention, a touch screen bonding member including an upper protective film and a lower protective film disposed above and below the touch electrode layer to protect the touch electrode layer In, by forming a deletion region for removing some edge regions of the first protective film that is peeled off first among the upper and lower protective films, the initial peeling position P1 of the first protective film is the peeling position of the remaining second protective film and the touch electrode layer. By making the (P2) different, it is characterized in that only the first protective film can be peeled off.

As described above, in an embodiment of the present invention, as a touch screen bonding member (TSB) used to form a touch screen display panel by attaching a display panel and a transparent window to both sides, it is formed on the touch electrode layer and the touch electrode layer. An upper protective film on which a transparent window is peeled off for attachment, and a lower protective film formed under the touch electrode layer and peeled off for attachment to the display panel, and a peeling process in the edge region of one of the upper and lower protective films It may be configured to include a deletion region from which a partial region of the protective film has been deleted in order to prevent peeling defects in.

Hereinafter, various embodiments of the present invention will be described in more detail with reference to FIG. 4.

4 shows a touch screen bonding member according to an embodiment of the present invention, FIG. 4 (a) is a partial plan view, FIG. 4 (b) is a cross-sectional view, and FIG. 4 (c) is an enlarged area of a deletion area. Is also.

The touch screen bonding member (TSB) 400 according to an embodiment of the present invention includes a touch electrode layer 470 of a whole area to be attached to a display panel, an upper protective film 460 on the upper side, and a lower protective film ( 480) is laminated.

Each of the upper and lower protective films 460 and 480 is for temporarily protecting the touch electrode layer in the upper and lower portions of the touch electrode layer, and are elements that are finally peeled off and removed.

That is, the touch screen bonding member 400 is manufactured as described above and supplied to the manufacturing process of the touch screen display panel, and after peeling (removing) the upper protective film 460, the transparent window, which is the outermost surface of the display panel, is After lamination is performed and the lower protective film 480 is peeled off and removed, a display panel such as an LCD or OLED is attached to generate a final touch screen display device.

On the other hand, the touch screen bonding member 400 according to an embodiment of the present invention has an FPCB 410 connected thereto, and includes an FPCB connection pad 420 that is a connection part between the FPCB and the touch screen bonding member, and protects the upper part. It includes a deletion area 430 from which some areas of the film have been removed.

In the embodiment of FIG. 4, the deletion region 430 is a form in which a partial region of the upper protective film 460 is removed, and the deletion region 430 is a certain region in a chamfer shape at one corner of the touch screen bonding member 400. The formed example is shown.

When the deletion region 430 is formed, as shown in FIG. 7, in the peeling process of peeling the upper protective film, the initial peeling position P1 at which the peeling roller first applies a force is the touch electrode layer 470 and the lower protective film ( Since it deviates from the lower peeling position P2 of the 480, it functions to prevent peeling defects as described in FIGS. 2 and 3 from occurring.

That is, a phenomenon in which the touch electrode layer 470 is peeled together in the process of peeling the upper protective film 4360 by making the initial position to peel the upper protective film 460 slightly inward from the edge of the touch screen bonding member. It is to be prevented.

4B is a cross-sectional view taken along line C-C′ of FIG. 4A, with the touch electrode layer 470 interposed therebetween, and an upper protective film 460 such as an OCA release film is formed on the top It is shown that a lower protective film 470 such as an ITO protective film is formed at the lower portion, and a deletion region 430 from which a partial region of the upper protective film 460 is removed is shown.

In this specification, “upper” refers to the outer side of the display device based on the touch electrode layer, that is, the side close to the user's touch operation surface. Conversely, “lower” refers to the inside of the device, ie, LCD or OLED based on the touch electrode layer. It is defined to mean the display panel side.

In addition, in the present specification, the “upper protective film” should be understood as a generic term meaning all types of thin films, films, etc., which are formed on the touch electrode layer to protect the touch electrode layer and then be removed during the manufacturing process of the display device, and the OCA release film, It may also be expressed in other terms such as transfer film such as IMD film (In Mold Decoration film), IML film (In Mold Lamination film), IMT film (Insert Mold Transcription film).

In the present specification, the “lower protective film” should also be understood to mean all types of thin films, films, etc., which are deposited under the touch electrode layer to protect the touch electrode layer and then be removed during the manufacturing process of the display device. ITO protective film, transparent It may also be expressed in other terms such as a protective film, an electrode protective film, and the like.

Meanwhile, the touch electrode layer 470 may generally include a first electrode layer that can be expressed as a sensing electrode and a receiving (Rx) electrode, and a second electrode layer that can be expressed as a driving electrode or a transmission (Tx) electrode. It is not limited.

In addition, the touch electrode layer 470 may include constant electrode patterns made of a transparent conductive material on one or both sides of the base film made of a transparent material, and these electrode patterns are located above the display panel, but light from the lower display panel is transmitted. Since it should be done, it is usually a transparent conductive material, for example, a metal oxide such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO), a combination of metal and oxide such as ZnO:Al or SnO2:Sb. It can be composed of.

The detailed configuration of the touch electrode layer 470 will be described in more detail below with reference to FIG. 5.

Meanwhile, as shown in (c) of FIG. 4, in the embodiment of FIG. 4, the deletion region 430 is formed by removing the upper protective film 460 in a partial area of the upper right corner of the touch screen bonding member 400. Accordingly, the deletion region 430 may have a rectangular shape or a trapezoidal shape or a chamfer shape when viewed from above.

As shown in FIG. 1, the FPCB connection pad part 420 may include various terminals connected to the FPCB, and a sealing material such as UV sealing is applied to prevent these metal terminals from being exposed to the outside. It is common.

In the UV sealing process, the sealing material is applied only to the FPCB connection pad part 420 and does not cross over to the rest of the area. On both sides of the FPCB connection pad part 420, an overflow prevention dam part 440 is formed.

In the embodiment of FIG. 4, the deletion region 430 may be formed as an outer part of the overflow prevention dam part 440 of the sealing for protecting the FPCB connection pad. That is, an area from the outer edge of the sealing overflow prevention dam part 440 to the upper right corner of the touch screen bonding member may be formed as the deletion area 430.

On the other hand, in an embodiment of the present invention, the size or width of the erasing area 430 may be variably determined, but if the erasing area is too large, there is a disadvantage that the protection of the touch electrode may be insufficient in the deleted area. If the region is too small, the effect of preventing peeling defects due to the deviation of the peeling position may be halved, and thus it may be optimally defined in consideration of both.

In addition, in the embodiment of FIG. 4, the deletion region is illustrated as a chamfered shape of the corner region, but is not limited thereto. In the case where the peeling roller is elongated in the longitudinal direction, the deletion region may be formed in a form elongated in one direction. There will be.

5 is a detailed cross-sectional view of a touch screen bonding member according to an embodiment of the present invention.

In the embodiment of FIG. 5, as showing an example of a detailed configuration of the touch electrode layer 470 between the upper protective film 460 and the lower protective film 480, the first adhesive layer ( A second touch electrode layer 474 bonded to the upper protective film by 472, and bonded to the first touch electrode layer 474 under the first touch electrode layer 474 by a second adhesive layer 476 The touch electrode layer 478 may be formed.

That is, the touch electrode layer 470 is composed of a double electrode layer of the first touch electrode layer 474 and the second touch electrode layer 478, and in order to adhere the upper first touch electrode layer 474 to the upper protective film 460 The first adhesive layer 472 is formed, and the second adhesive layer 476 is formed to adhere the second touch electrode layer 478 and the first touch electrode layer 474 to each other.

On the other hand, in the case of the structure as shown in FIG. 5A, the deletion region 430 has a shape in which not only a partial region of the upper protective film 460 but also a corresponding region of the first adhesive layer 472 below it has been removed. desirable.

At this time, the second touch electrode layer 478 is a driving electrode or a transmission (Tx) electrode for applying a pulse signal required for touch sensing by an external touch control unit, and the first touch electrode layer 474 on the upper side thereof is To detect the change in capacitance by the user's finger touch, but may be a sensing electrode or a receiving (Rx) electrode, it is not limited thereto.

Meanwhile, the first touch electrode layer 474 and the second touch electrode layer 478 may each have a thickness selected within a range of about 30 to 70 μm, and may be formed, for example, to a thickness of about 50 μm.

The first adhesive layer 472 and the second adhesive layer 476 may be an optically transparent OCA (optically clear adhesive) film or an OCA adhesive layer, respectively, and have a thickness of about 100 μm and the first electrode layer 474 and the second electrode layer 478 ) Can be formed thicker than.

It is preferable that the first adhesive layer and the second adhesive layer of the OCA material do not cause yellowing and haze under high temperature and high humidity, and durability reliability that does not cause lift, peeling, or air bubbles on the surface of the substrate or glass attached thereto is secured. It is desirable that it is done. In addition, it is desirable to secure reworkability that can be detached again after being attached to a component such as a glass surface of the lower LCD panel or a transparent window at the upper part. In order to secure re-peelability, a pressure-sensitive adhesive having a hydroxyl group (-OH) as a crosslinking functional group may be used, but a pressure-sensitive adhesive having mainly acrylic acid having strong adhesiveness as a crosslinking functional group can be used as long as the re-peelability is secured.

As such, an acrylic copolymer may be used as a re-peelable transparent adhesive (Reworkable OCA) that can be used as an OCA adhesive layer, and may be prepared using a conventional solution polymerization method, but is not limited thereto.

In addition, as shown in (b) of FIG. 5, the first electrode layer 474 is formed as a receiving (Rx) electrode pattern uniformly patterned with an upper transparent film 474' and a transparent conductive material such as ITO. 1 may be made of electrode patterns 474”, and likewise, the second electrode layer 478 is a transmission (Tx) electrode pattern uniformly patterned with a lower transparent film 478' and a transparent conductive material such as ITO thereon. The second electrode patterns 478 ″ may be used as examples, but are not limited thereto.

At this time, the first electrode patterns 474” are in the shape of a plurality of strips elongated in the X-axis direction, and the second electrode patterns 478” are elongated in the Y-axis direction. It may be formed in a grid shape, but is not limited thereto.

In this way, a form in which the touch electrode layer is composed of two transparent films and electrode patterns respectively formed on one surface thereof may be referred to as a so-called “FF type”.

In addition, as shown in (c) of FIG. 5, the first electrode patterns 474" as reception (Rx) electrode patterns are formed on one surface of one common transparent film 474' or 478' of the touch electrode layer 470 In addition, it may have a structure in which second electrode patterns 478” as transmission (Tx) electrode patterns are formed on the other surface. In this way, a structure in which transmission electrode patterns and reception electrode patterns are formed on both sides of one transparent film may be referred to as “F2 type”.

As described above, in an embodiment of the present invention, the touch electrode patterns constituting the touch electrode layer of the touch screen bonding member are electrode patterns formed on one surface of a transparent film or a transparent window, and have excellent light transmittance and electrical conductivity. oxide), IZO (indium zinc oxide), or ZnO (zinc oxide).

On the other hand, the second electrode patterns or the second electrode layer used as sensing electrodes are used as a conductive plate that generates a change in capacitance according to contact with a human body, etc., and the number of contact inputs on the transparent window and the contact position are accurate. For judgment, it may be patterned into a predetermined shape.

For example, the ITO formation surface of an ITO film material in which ITO is formed on one surface of polyethylene resin (polyethylene terephtalete, PET) is patterned, and the patterned ITO film itself is defined as an electrode pattern layer, and the electrode pattern layer is an upper electrode layer. It may include a first electrode pattern layer 474” and a second electrode pattern layer 478” that is a lower electrode layer.

6 shows a touch screen bonding member according to another embodiment of the present invention.

In the exemplary embodiment of FIG. 6, unlike the previous exemplary embodiment in which a portion of the upper protective film 460 has been deleted, the deletion region 430 includes a configuration in which a partial region of the lower protective film 480 is removed.

4 and 5, the order in which the upper protective film 460 is first peeled off and a transparent window is attached to the peeled surface, and then the lower protective film 480 is peeled off and attached to the upper surface of the display panel. Although assumed, in some cases, the lower protective film 480 may be peeled off first and attached to the display panel, and then the upper protective film may be peeled off.

In this way, assuming a process in which the lower protective film 480 is first peeled off, the deletion region 9430 ′ is configured in a form in which a partial region of the lower protective film 480 is removed, so that the lower protective film 480 is peeled off. In this case, it is necessary to shift the initial peeling position from the peeling position between the remaining upper protective film 460 and the touch electrode layer 470.

Accordingly, in the exemplary embodiment of FIG. 6, the deletion region 430' is formed by removing a partial region of the lower protective film 480.

On the other hand, even when the deletion region 430' is formed on the lower protective film 480, the shape of the deletion region 430' may be a chamfered shape of one corner as described above, but Fig. 6(a) As shown in ), it may have a rectangular shape including one side of the edge.

6(a) shows an example in which the deletion region 430' is formed to have a predetermined width along the lower side of the touch screen bonding member, but is not limited thereto, and is formed so as to extend only a part of one side. It can be done, and it will be possible in any shape by removing some areas of the corners (triangles, squares, polygons, etc.).

7 is a diagram illustrating a principle of minimizing peeling defects in a touch screen bonding member according to an embodiment of the present invention.

In the case of forming the deletion region 430 on the upper protective film as in the embodiment of the present invention, the touch screen bonding member is mounted on the TSB peeling stage 191 so that the upper protective film 460 faces upward, and then the peeling roller 192 ), the initial peeling position of the upper protective film, that is, the position at which the peeling roller first applies force to the upper protective film, becomes the point P1.

On the other hand, the peeling position of the touch electrode layer where the touch electrode layer 470 and the lower protective film 480 are first separated is P2, and since it is deviated from the initial peeling position P1 of the upper protective film, as shown in FIG. Peeling defects caused by the alignment of the positions do not occur.

As described above, in the embodiments of the present invention, by forming a deletion region from which a predetermined region is removed from the protective film on both sides of the touch screen bonding member, the initial peeling force application position (P1) of the first peeled protective film By offsetting the remaining protective film and the first peeling position P2 of the touch electrode layer, only the protective film to be peeled first is peeled off.

Meanwhile, a method of manufacturing a touch screen display panel according to an exemplary embodiment of the present invention is a method using a touch screen bonding member including a touch electrode layer and an upper protective film and a lower protective film respectively formed on the upper and lower portions thereof, and the upper or lower protective film The first step of attaching the touch screen bonding member to the TSB peeling stage so that the first protective film including the erased region from which some of the regions have been removed is facing upward, and the first protection with the vicinity of the deletion region as an initial peeling position. The second step of peeling the film, the third step of attaching one of the transparent window or the display panel to the peeled side, and the first protective film having no erasure area among the upper or lower protective films are peeled and displayed on the surface. It may include a fourth step of attaching a panel or a transparent window.

8 is a flowchart illustrating a method of manufacturing a touch screen display panel according to an embodiment of the present invention.

In FIG. 8, an exemplary embodiment in which the erasure region is formed on the upper protective film is described as an example, but is not limited thereto.

In a detailed process of a method for manufacturing a touch screen display panel, first, a touch screen bonding member having an upper protective film in which the deletion region 430 is formed is mounted on the TSB peeling stage (S810). At this time, of course, the upper protective film must be directed upward, and thus the lower protective film of the touch screen bonding member is disposed in contact with the TSB peeling stage.

In this state, a peeling roller for peeling the upper protective film is introduced into the upper protective film, and the peeling roller first applies a peeling force to the upper protective film at an initial peeling position (P1 in FIG. 7) near the deletion region.

In this way, the peeling roller starts to roll up the upper protective film at the initial peeling position P1 and proceeds in one direction to roll up the entire upper protective film and peel it (S820).

Next, a transparent window is laminated on the surface from which the upper protective film is peeled (S830).

At this time, the transparent window is a high-strength material such as glass or acrylic resin with excellent light transmittance, or PET (polyethylene terephthalate), PC (polycarbonate), PES (polyether sulfone), PI (polyimide), PMMA (PolyMethly), which can be applied to flexible displays. MethaAcrylate) or the like.

These transparent windows serve to maintain or define the appearance of the input unit of the touch screen display panel or the touch screen panel (TSP), and at least some areas are exposed to the outside to accommodate the contact of the user's body or conductive objects such as a stylus pen. do. In this case, an additional protective layer may be optionally included in order to prevent damage or destruction of the transparent window due to contact.

Next, the touch screen bonding member to which the transparent window is attached is remounted on the TSB peeling stage so that the lower enveloping film faces upward, and then the lower protective film without the deletion area is peeled off (S840). At this time, the lower protective film is peeled off. Since there is no area to be deleted, the edge of the protective film will be the initial peeling position (P2).

When the lower protective film is peeled off, the touch electrode layer is exposed and the upper surface of the display panel is adhered to the touch electrode layer surface (S850). This completes the manufacturing of the touch screen display panel.

At this time, the attached display panel is not only a liquid crystal display, but also all kinds of display panels requiring a touch function, such as an organic light emitting device and a plasma display panel. Includes.

As described above, the results of testing the peeling of the protective film including the deletion region according to an embodiment of the present invention are summarized in the following table.

<Test results of Examples of the present invention>

As summarized in the table above, in the case of a touch screen bonding member without a deletion area as in the prior art, when 20 pieces of the touch screen bonding member are peeled, a total of 6 wrinkles have a wrinkled peeling defect. It can be seen that no peeling defects occurred during the dog peeling process.

In addition, as a secondary test, as a result of increasing the number of peelings of the touch screen bonding member according to the embodiment of the present invention to a total of 140 pieces, a weak wrinkle enough to pass the specification occurred only in two products. Peeling (full peeling) did not occur at all, and the effect of improving the overall peeling defect was proven, such as passing all driving tests.

Using the embodiment of the present invention as described above, in a touch screen bonding member including a protective film on both sides of the touch electrode layer, there is an effect of minimizing the occurrence of peeling defects in the process of peeling one of the protective films.

In addition, according to an embodiment of the present invention, by forming a certain erasing region on one of the protective films on both sides of the touch electrode layer of the touch screen bonding member, which is an intermediate component forming the touch screen display panel, the initial peeling force of the protective film By making the applied initial peeling position P1 different from the peeling position P2 of the remaining protective film and the touch electrode layer, there is an effect of minimizing the occurrence of peeling defects.

The description above and the accompanying drawings are merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention pertains, combinations of configurations without departing from the essential characteristics of the present invention Various modifications and variations, such as separation, substitution, and alteration, will be possible. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

400: touch screen bonding member (TSB)
410: FPCB 420: FPCB connection pad
430; Deleted area 440: Sealing overflow prevention dam
460: upper protective film (OCA release film)
470: touch electrode layer 480: lower protective film (ITO protective film)
472, 476: first and second adhesive layers
474: first touch electrode layer 478: second touch electrode layer

Claims (10)

As a touch screen bonding member used to form a touch screen display panel by attaching a display panel and a transparent window to both sides,
A touch electrode layer;
An upper protective film formed on the touch electrode layer and peeled off to attach the transparent window;
A lower protective film formed under the touch electrode layer and peeled off to attach the display panel;
Including,
An edge region of one of the upper protective film and the lower protective film includes a deletion region from which a partial region of the protective film is removed in order to prevent peeling defects in the peeling process,
The touch screen bonding member,
A flexible printed circuit board (FPCB) connection pad part is additionally included, and the deletion area is a sealing for protecting the flexible printed circuit board connection pad part among the edge regions of one of the upper and lower protective films. Touch screen bonding member, characterized in that defined as the outer portion of the overflow prevention dam portion. The method of claim 1,
The deletion region is a touch screen bonding member, characterized in that formed in a chamfer shape in a partial region of the edge of the upper protective film. delete The method of claim 1,
The deletion region is formed on the lower protective film and has a chamfer shape including one edge or a rectangular shape including one edge. The method of claim 2,
A touch screen bonding member, wherein a first adhesive layer is included between the touch electrode layer and the upper protective film, and the deletion region is formed by removing both the upper protective film and the first adhesive layer. The method of claim 1,
The touch electrode layer includes a first touch electrode layer composed of an upper transparent film and receiving (Rx) electrode patterns formed on one side thereof. A touch screen bonding member comprising a lower transparent film and a second touch electrode layer composed of transmission (Tx) electrode patterns formed on one side thereof. The method of claim 1,
The touch electrode layer comprises a common transparent film, receiving (Rx) electrode patterns formed on one side of the common transparent film, and transmitting (Tx) electrode patterns formed on the other side of the common transparent film. A touch screen display panel manufacturing method using a touch screen bonding member including a touch electrode layer and an upper protective film and a lower protective film respectively formed on the upper and lower portions thereof,
A first step of mounting the touch screen bonding member on the TSB peeling stage so that the first protective film including the deletion region from which some of the upper or lower protective films are removed is directed upward:
A second step of peeling the first protective film by using the vicinity of the deletion region as an initial peeling position;
A third step of attaching one of a transparent window or a display panel to the peeled surface;
A fourth step of peeling off a second protective film without a deletion region among the upper or lower protective films, and attaching a display panel or a transparent window to the surface thereof;
Touch screen display panel manufacturing method comprising a. The method of claim 8,
The first protective film is an upper protective film, and the deletion region is formed in a chamfered shape in a partial region of a corner of the upper protective film. The method of claim 9,
And the deletion region is defined as a portion outside of a dam part for preventing overflow of a sealing for protecting a connection pad of a flexible printed circuit board among corner regions of the upper protective film.

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