KR102153132B1 - flexible touch screen panel and flexible display device with the same - Google Patents

Abstract

According to an embodiment of the present invention, sensing electrodes as a touch sensor are formed on at least one surface of a substrate having flexible characteristics, and the sensing electrodes are implemented in a flexible conductive mesh shape, thereby securing flexible characteristics and reducing thickness. In addition, a polarizing plate having a flexible characteristic is formed on a substrate on which the sensing electrodes are formed, thereby implementing a flexible touch screen panel that overcomes the problem of visual recognition of the sensing electrodes.

Description

Flexible touch screen panel and flexible display device with the same

Embodiments of the present invention relate to a touch screen panel, and more particularly, to a flexible touch screen panel and a flexible display device including the same.

The touch screen panel is an input device capable of inputting a user's command by selecting instructions displayed on a screen such as an image display device with a human hand or an object.

To this end, the touch screen panel is provided on the front face of the image display device and converts a contact position directly in contact with a person's hand or object into an electrical signal. Accordingly, the instruction content selected at the contact position is received as an input signal.

Since such a touch screen panel can replace a separate input device connected to an image display device such as a keyboard and a mouse, the range of use thereof is gradually expanding.

As a method of implementing a touch screen panel, a resistive method, a light sensing method, and a capacitive method are known. Among them, the capacitive type touch screen panel is a conductive sensing electrode when a person's hand or object is in contact. The contact position is converted into an electrical signal by sensing a change in capacitance formed by the other sensing electrode or the ground electrode of.

In general, such a touch screen panel is attached to the outer surface of an image display device such as a liquid crystal display device and an organic light emitting display device, and is often commercialized. Therefore, the touch screen panel is required to have high transparency and thin thickness.

In addition, in recent years, a flexible image display device is being developed, and in this case, a touch screen panel attached to the flexible image display device is also required to be flexible.

In the conventional touch screen panel, the sensing electrodes are implemented using a transparent conductive material such as ITO, but in this case, when the flexible touch screen panel is bent or folded, a crack may occur in the sensing electrode, resulting in a malfunction. There are drawbacks.

In addition, since a conventional touch screen panel requires a thin film forming process and a pattern forming process to form the sensing electrode, etc., properties such as high heat resistance and chemical resistance are required, and accordingly, glass conforming to the process characteristics is required. ) A sensing electrode or the like was formed on the substrate.

However, in this case, since the glass substrate must have a thickness greater than a certain value so as to be transportable in the process, there is a disadvantage in that it does not satisfy the characteristic that requires a thin thickness, and that a flexible characteristic cannot be implemented.

In an embodiment of the present invention, sensing electrodes as a touch sensor are formed on at least one surface of a substrate having flexible characteristics, and the sensing electrodes are implemented in a flexible conductive mesh shape, thereby securing flexible characteristics and reducing thickness at the same time. The purpose of this is to implement a flexible touch screen panel.

In addition, an embodiment of the present invention is to implement a flexible touch screen panel that overcomes the problem of visual recognition of the sensing electrodes by forming a polarizing plate having a flexible characteristic on a substrate on which the sensing electrodes are formed.

In addition, another embodiment of the present invention is to provide a flexible display device having the above flexible touch screen panel.

In order to achieve the above object, a flexible touch screen panel according to an embodiment of the present invention includes: a substrate having a flexible characteristic; Sensing electrodes formed on at least one surface of the substrate and made of an opaque conductive material; A polarizing plate formed on a substrate on which the sensing electrodes are formed is included, and the sensing electrodes are implemented in a mesh shape including a plurality of openings.

In this case, the sensing electrodes are implemented as first sensing electrodes arranged in a first direction and second sensing electrodes arranged in a second direction crossing the first direction.

In addition, the first sensing electrodes are composed of first sensing cells arranged in a plurality along the first direction and first connection patterns connecting the first sensing cells to each other, and the second sensing electrodes It consists of a plurality of second sensing cells arranged along two directions and second connection patterns connecting the second sensing cells to each other.

Here, the first sensing electrodes and the second sensing electrodes may be formed on the same surface of the substrate, and in this case, an insulating layer is interposed at at least one crossing portion between the first sensing electrode and the second sensing electrode.

In another embodiment, the first sensing electrodes and the second sensing electrodes may be formed on different surfaces of the substrate, respectively.

In addition, the opaque metal is at least one of Ag, Al, Cu, Cr, and Ni low-resistance metal or nano-metal conductive film.

In addition, the polarizing plate may be implemented as a film made of a polyvinyl alcohol (PVA) material having a flexible property or a coated polarizing layer.

In this case, the coated polarizing layer may be formed of a thin crystal film polarizer.

In addition, the substrate may be a low retardation film, and may be implemented as one of a non-stretched polycarbonate (PC) or a cyclic polyolefin (COP) film.

At this time, at least one retardation film may be further formed between the substrate and the polarizing plate, and the retardation film may be a quarter-wave plane (QWP) or a half-wave plane (half-wave plane). HWP).

In another embodiment, the substrate may be implemented as one of a polycarbonate (PC) having a retardation function, an oriented polypropylene (OPP), and a polyvinyl alcohol (PVA) film. In this case, the substrate is a quarter wave plate (quarter). -wave plane, QWP), and a half-wave plane (HWP) may be further formed between the substrate and the polarizing plate.

According to another exemplary embodiment of the present invention, a flexible display device including a flexible touch screen panel includes: a substrate having flexible characteristics; Sensing electrodes formed on at least one surface of the substrate and made of an opaque conductive material; A polarizing plate formed on the substrate on which the sensing electrodes are formed; A flexible display device attached to a lower portion of the substrate is included, and the sensing electrodes are implemented in a mesh shape including a plurality of openings.

In this case, the flexible display device may be implemented as an organic light emitting display device.

In addition, a window substrate may be attached to the upper surface of the polarizing plate, and the window substrate may be formed of at least one of polymethyl methacrylate (PMMA), acrylic, and polyester.

In order to achieve the above object, a flexible touch screen panel according to an embodiment of the present invention includes: a substrate having flexible characteristics; First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; An adhesive layer provided between the polarizing plate and the substrate; And at least one retardation film provided between the substrate and the polarizing plate. Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings, and the first sensing electrodes are a plurality of first sensing cells arranged along a first direction, and the first sensing cell A plurality of second sensing cells arranged in a second direction crossing the first direction, and the second sensing electrodes interconnecting the second sensing cells It may include second connection patterns. The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns, and an insulating layer is disposed between the first connection patterns and the second connection patterns Can be. The at least one retardation film may be at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate.

According to an embodiment, the opaque conductive material may be at least one of Ag, Al, Cu, Cr, Ni, and a nano metal conductive layer.

According to an embodiment, the polarizing plate may include a film made of a polyvinyl alcohol (PVA) material having a flexible property.

A flexible display device including flexible touch sensor electrodes according to an embodiment of the present invention includes: a substrate having flexible characteristics; First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; An adhesive layer provided between the polarizing plate and the substrate; At least one retardation film provided between the substrate and the polarizing plate; And a flexible display device provided under the first and second sensing electrodes. Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings, and the first sensing electrodes are a plurality of first sensing cells arranged along a first direction, and the first sensing cell A plurality of second sensing cells arranged in a second direction crossing the first direction, and the second sensing electrodes interconnecting the second sensing cells It includes second connection patterns, and the first sensing electrodes and the second sensing electrodes may cross each other between the first connection patterns and the second connection patterns. An insulating film is disposed between the first connection patterns and the second connection patterns, and the at least one retardation film is 1/2 on a 1/4 wave plate, a 1/2 wave plate, and a 1/4 wave plate. It may be at least one of the structures in which the wave plates are stacked. The flexible display device may be a flexible organic light emitting display device.

A display device including flexible touch sensor electrodes according to an embodiment of the present invention includes: a substrate having flexible characteristics; First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; A window substrate provided on the polarizing plate; A first adhesive layer provided between the polarizing plate and the substrate; A second adhesive layer provided between the window substrate and the polarizing plate; At least one retardation film provided between the substrate and the polarizing plate; And a flexible display device provided under the first and second sensing electrodes. Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings, and the first sensing electrodes are a plurality of first sensing cells arranged along a first direction, and the first sensing cell A plurality of second sensing cells arranged in a second direction crossing the first direction, and the second sensing electrodes interconnecting the second sensing cells It includes second connection patterns, and the first sensing electrodes and the second sensing electrodes may cross each other between the first connection patterns and the second connection patterns. An insulating film is disposed between the first connection patterns and the second connection patterns, and the at least one retardation film is 1/2 on a 1/4 wave plate, a 1/2 wave plate, and a 1/4 wave plate. It may be at least one of the structures in which the wave plates are stacked. The flexible display device may be a flexible organic light emitting display device.

A flexible touch screen panel according to an embodiment of the present invention includes a substrate having flexible characteristics; First sensing electrodes provided on the first surface of the substrate; Second sensing electrodes provided on a second surface of the substrate opposite to the first surface; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; An adhesive layer provided between the polarizing plate and the substrate; And at least one retardation film provided between the substrate and the polarizing plate. The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction, and the first sensing electrodes are arranged in a first direction. 1 sensing cells and a first connection pattern connecting the first sensing cells to each other, the second sensing electrodes are a plurality of second sensing cells arranged in the second direction, and the second sensing It may include second connection patterns that connect cells to each other. The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP), and the at least one retardation film is a 1/4 wavelength plate, a 1/2 wavelength plate, And a structure in which a 1/2 wave plate is stacked on a 1/4 wave plate.

According to an embodiment, the substrate may include a retardation film having a retardation value of 20 nm or less.

According to an embodiment, the first and second sensing electrodes may include an opaque conductive material.

According to an embodiment, the opaque conductive material may be at least one of Ag, Al, Cu, Cr, Ni, and a nano metal conductive layer.

A display device including a flexible touch screen panel according to an embodiment of the present invention includes: a substrate having flexible characteristics; First sensing electrodes provided on the first surface of the substrate; Second sensing electrodes provided on a second surface of the substrate opposite to the first surface;

Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; A flexible display device attached under the substrate; A first adhesive layer provided between the polarizing plate and the substrate; A second adhesive layer provided between the substrate and the flexible display device; A window substrate provided on the polarizing plate; And a third adhesive layer provided between the window substrate and the polarizing plate. The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction, and the first sensing electrodes are arranged in a first direction. 1 sensing cells and a first connection pattern connecting the first sensing cells to each other, the second sensing electrodes are a plurality of second sensing cells arranged in the second direction, and the second sensing It may include second connection patterns that connect cells to each other. The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP), at least one retardation film is provided between the substrate and the polarizing plate, and the at least one retardation film includes the at least one The retardation film of may be at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate. The flexible display device may be a flexible organic light emitting display device.

A flexible touch screen panel according to an embodiment of the present invention includes a substrate having flexible characteristics; First sensing electrodes and second sensing electrodes provided on the same surface of the substrate; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; An adhesive layer provided between the polarizing plate and the substrate; And at least one retardation film provided between the substrate and the polarizing plate. The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction, and the first sensing electrodes are arranged in a first direction. 1 sensing cells and a first connection pattern connecting the first sensing cells to each other, the second sensing electrodes are a plurality of second sensing cells arranged in the second direction, and the second sensing Second connection patterns for connecting cells to each other are included, and the first sensing electrodes and the second sensing electrodes may cross each other between the first connection patterns and the second connection patterns. An insulating film is disposed between the first connection patterns and the second connection patterns, and the substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP), and the at least one retardation film The at least one retardation film may be at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate.

A display device including a flexible touch screen panel according to an embodiment of the present invention includes: a substrate having flexible characteristics; First sensing electrodes and second sensing electrodes provided on the same surface of the substrate; Position detection lines connected to one of the first and second sensing electrodes; A polarizing plate provided on the substrate; A first adhesive layer provided between the polarizing plate and the substrate; A second adhesive layer provided between the substrate and the display device; A window substrate provided on the polarizing plate; A third adhesive layer provided between the window substrate and the polarizing plate; And at least one retardation film provided between the substrate and the polarizing plate. The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction, and the first sensing electrodes are arranged in a first direction. 1 sensing cells and a first connection pattern connecting the first sensing cells to each other, the second sensing electrodes are a plurality of second sensing cells arranged in the second direction, and the second sensing Second connection patterns for connecting cells to each other are included, and the first sensing electrodes and the second sensing electrodes may cross each other between the first connection patterns and the second connection patterns. An insulating layer is disposed between the first connection patterns and the second connection patterns, and the substrate may include at least one of polycarbonate (PC) and cyclic polyolefin (COP). The at least one retardation film is at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate, and the display device May be a flexible organic light emitting display device.

According to such an embodiment of the present invention, sensing electrodes as a touch sensor are formed on at least one surface of a substrate having flexible characteristics, and the sensing electrodes are implemented in a flexible conductive mesh shape, thereby securing flexible characteristics. At the same time, there is an advantage of reducing the thickness.

In addition, according to the exemplary embodiment of the present invention, a polarizing plate having a flexible characteristic is formed on a substrate on which the sensing electrodes are formed, so that the problem of visual recognition of the sensing electrodes may be overcome.

1 is a plan view showing a touch screen panel according to an embodiment of the present invention.
2A and 2B are cross-sectional views of the touch screen panel shown in FIG. 1;
3A and 3B are cross-sectional views of a touch screen panel and a flexible display device including the same according to an embodiment of the present invention.
4A and 4B are cross-sectional views of a touch screen panel and a flexible display device including the same according to another exemplary embodiment of the present invention.
5 is a cross-sectional view of a touch screen panel and a flexible display device having the same according to another exemplary embodiment of the present invention.
6A and 6B are cross-sectional views of a touch screen panel and a flexible display device including the same according to still another exemplary embodiment of the present invention.
7 is a cross-sectional view of a touch screen panel and a flexible display device including the same according to another embodiment of the present invention.
8A and 8B are cross-sectional views of a touch screen panel and a flexible display device including the same according to another exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a plan view showing a touch screen panel according to an embodiment of the present invention, and FIGS. 2A and 2B are cross-sectional views of the touch screen panel shown in FIG. 1.

1 and 2, a touch screen panel according to an embodiment of the present invention includes a substrate 10 having a flexible characteristic, and first and second sensing electrodes formed on at least one surface of the substrate 10 ( 50, 60, and first and second position detection lines 150 for connecting the first and second sensing electrodes 50 and 60 to an external touch driving circuit (not shown) through the pad unit 200 160).

As shown in FIG. 1, the first sensing electrode 50 is formed to be elongated in a first direction (for example, in the X-axis direction), so that a second direction (for example, Y) crosses the first direction. A plurality of pieces may be arranged along the axial direction).

In addition, the second sensing electrode 60 is formed to be elongated in the second direction, and a plurality of second sensing electrodes 60 may be arranged along the first direction.

The sensing electrodes 50 and 60 according to the embodiment of the present invention have a disadvantage of a transparent conductive material (for example, Indium Tin Oxide (ITO)) that has been used as a material for forming the conventional sensing electrode, that is, the flexible touch screen panel is bent or folded. It is preferable to use a flexible, opaque conductive material as a material for forming the sensing electrodes 50 and 60 in order to prevent malfunction due to occurrence of a crack in the sensing electrode during operation.

At this time, as a conductive material forming the sensing electrodes 50 and 60, a low-resistance metal such as Ag, Al, Cu, Cr, Ni, etc. as an opaque metal or a nano-metal conductive film such as silver nanowire (AgNW) may be used. , But is not limited thereto.

That is, the conventional ITO used as a sensing electrode lacks flexibility, so when applied to a flexible touch screen panel, there is a problem that cracks easily occur. However, when an opaque metal is used as in the embodiment of the present invention, it is cracked compared to the ITO. It is easy to apply to the flexible touch screen panel due to the low occurrence of

In addition, when the sensing electrodes 50 and 60 are formed of a metal having a relatively low resistance compared to ITO, there is an advantage in that RC delay is also reduced.

However, when the sensing electrodes 50 and 60 are formed of opaque metal, the characteristic metallic reflective gloss and surface reflectivity are increased, so that the user can visually recognize them, which makes it difficult to implement a high-quality product.

Accordingly, the embodiment of the present invention is to overcome this disadvantage by forming a polarizing plate having a flexible characteristic on the substrate 10 on which the sensing electrodes 50 and 60 are formed to remove the characteristic metallic reflection gloss and lower the reflectance. , It is characterized in that it overcomes the problem that the sensing electrodes are recognized.

In this case, the substrate 10 on which the sensing electrodes are formed is a low retardation film having a low retardation value, which is located under the polarizing plate and has a flexible material, and includes non-stretched polycarbonate (PC) and cyclic polyolefin (Cyclic Polyolefin: COP) can be implemented as a film.

Alternatively, the substrate 10 may serve as a retardation film provided in a polarizing plate. In this case, the substrate 10 may be polycarbonate (PC) having a retardation function, oriented polypropylene (OPP), or polyvinyl vinyl (PVA). Alcohol) can be implemented as a film.

The structure of the present invention may be implemented in the form of various embodiments, which will be described in more detail with reference to FIGS. 3 to 8 below.

In addition, an embodiment of the present invention is characterized in that the sensing electrodes 50 and 60 are formed in a mesh shape as shown in FIG. 1 in order to use the opaque conductive material as a sensing electrode.

More specifically, referring to FIG. 1, a first sensing electrode 50 includes a first sensing cell 51 arranged in a plurality along a first direction and a first sensing cell 51 electrically connecting the first sensing cell 51 to each other. It may be composed of a connection pattern 52, and the second sensing electrode 60 electrically connects the second sensing cells 61 and the second sensing cells 61 arranged in a plurality along the second direction to each other. It may be composed of a second connection pattern 62.

In addition, a plurality of openings 70 are formed in the first detection cell 51, the second detection cell 61, the first connection pattern 52, and the second connection pattern 62, through which mesh shape detection Electrodes can be implemented.

In this case, the first sensing cell 51 and the second sensing cell 61 may have a rhombus shape, but the shape of the sensing cell according to the exemplary embodiment of the present invention is not limited thereto.

In particular, a display device for displaying an image is arranged by regularly arranging a plurality of pixels under the substrate 10 on which the sensing cells are formed. In this case, when the shape and arrangement of the sensing cells have regularity, the pixels in the display device Since there is a possibility that the display quality may be degraded due to the occurrence of a moire phenomenon due to interference with the field, it is preferable to overcome this problem by implementing the edges of the sensing cells 51 and 52 in a random curved shape. I can.

However, in the embodiment of the present invention, for convenience of explanation, it will be described as an example that the sensing cells 51 and 52 are implemented in the same rhombus shape as shown in FIG. 1.

In addition, a first position detection line 150 is connected to one end of the first sensing electrode 50, and a second position detection line 160 is connected to one end of the second sensing electrode 60, and the first position The detection line 150 and the second position detection line 160 may transmit signals detected from each of the sensing electrodes 50 and 60 to an external touch driving circuit (not shown) through the pad unit 200.

That is, the touch driving circuit that has received signals through the first position detection line 150 and the second position detection line 160 can determine the user's touch position.

At this time, the first position detection line 150 may be formed of the same material as the first sensing electrode 50 connected to itself, and the second position detection line 160 is a second sensing electrode 60 connected to itself. It may be formed of the same material as.

Accordingly, since the position detection lines 150 and 160 can be formed through the same process as the detection electrodes 50 and 60, the process can be more simplified.

In addition, in the embodiment of the present invention, the first sensing electrode 50 and the second sensing electrode 60 may be formed together on the same surface of the substrate 10 or may be formed on both surfaces of the substrate 10, respectively.

First, referring to FIG. 2A, this is a structure in which the first sensing electrode 50 and the second sensing electrode 60 are formed together on the same surface of the substrate 10. In this case, the first sensing electrode 50 and the second sensing electrode 50 Since the portion where the second sensing electrode 60 crosses must be insulated, the insulating layer 41 may be interposed between the crossing portion of the first sensing electrode 50 and the second sensing electrode 60.

Since the crossing of the first sensing electrode 50 and the second sensing electrode 60 is mainly formed between the first connection pattern 52 and the second connection pattern 62, as shown in the enlarged cross-section of FIG. An insulating layer 41 may be present between the first connection pattern 52 and the second connection pattern 62.

In this case, the insulating layer 41 may be partially formed at the intersection of the first sensing electrode 50 and the second sensing electrode 60.

Next, referring to FIG. 2B, this is a structure in which the first sensing electrode 50 and the second sensing electrode 60 are formed on both sides of the substrate 10, respectively, and the substrate 10 is insulated as shown. The first sensing cell 51 and the first connection pattern 52 constituting the first sensing electrode 50 by serving as a layer are formed on the first surface of the substrate 10, and the second sensing electrode 60 The second sensing cell 61 and the second connection pattern 62 constituting) may be formed on the second surface of the substrate 10.

In this case, since it is not necessary to form a separate insulating layer pattern as shown in FIG. 2A, there is an advantage in that the process is simple.

3 to 8 are cross-sectional views of a touch screen panel according to various embodiments to which the structure of the touch screen panel described with reference to FIGS. 1 and 2 is applied, and a flexible display device including the same, and implementations of the present invention corresponding to each of the drawings below A detailed description will be given of the example stacked structure.

First, the embodiment shown in FIG. 3A is a first sensing cell 51 and a first connection pattern constituting the first sensing electrode 50 on the first surface of the substrate 10a, as in the exemplary embodiment of FIG. 2B. 52) and a first position detection line 150 connected to the first sensing electrode 50, and a second sensing cell constituting the second sensing electrode 60 on the second surface of the substrate 10a ( 61), a second connection pattern 62, and a second position detection line 160 connected to the second sensing electrode 60 are formed.

However, for convenience of explanation, in FIG. 3A, first sensing cells 51 and first position detecting lines 150 and second sensing cells 61 are respectively provided on the first and second surfaces of the substrate 10a. And the second position detection lines 160 are shown.

In addition, a polarizing plate 20 implementing a polarizing function is provided on an upper portion of the substrate 10a on which the sensing electrodes are formed, a window substrate 40 attached to an upper portion of the polarizing plate 20, and a lower portion of the polarizing plate 20. A retardation film 10b is provided, and a flexible display device 100 is provided under the substrate 10a.

At this time, the components are attached to each other by a transparent adhesive layer 30. In the drawing, the substrate 10a on which the sensing electrodes are formed is shown in a separate form, but this is to clearly show the positions of the sensing cells, etc., and is attached to each component by a transparent adhesive layer 30 formed above and below. do.

In addition, the display device 100 is a display device having flexible characteristics, which may be implemented as an organic light emitting display device.

As an example, an organic electroluminescent display device is a self-luminous device, and unlike conventional liquid crystal display devices, it is not necessary to have a backlight unit. Therefore, the substrate is made of polymethyl methacrylate (PMMA), acrylic (Acryl) having flexible characteristics. ), polyester (polyester, PET), etc. can have flexible properties.

In addition, the transparent adhesive layer 30 is a transparent adhesive material having a high light transmittance, and may be formed of SVR (Super View Resin) or OCA (Optical Cleared Adhesive).

In addition, the polarizing plate 20 is characterized in that it has a flexible characteristic.

Conventional polarizing plates are generally implemented in a structure in which a polarizer is interposed between upper and lower support layers. The polarizer serves to control the amount of transmitted light according to the degree of polarization of the incident light, and may be implemented as a film made of a polyvinyl alcohol (PVA) material. For example, the polarizer implements polarization by stretching a PVA film absorbing iodine with a strong tension.

In addition, the support layers provided on the upper and lower portions of the polarizer may be implemented as a film made of a TriAcetyl Cellulose (TAC) material for protecting and supporting the PVA film.

However, in the case of a polarizing plate having such a conventional laminated structure, since the polarizer has a thickness of about 20 μm, and the upper and lower support layers each have a thickness of about 80 μm, there is a disadvantage that the polarizer has a large thickness of about 180 μm. Since TAC, which is a material of the support layer, has a high modulus of elasticity, when the polarizing plate provided with the support layer is attached to the flexible touch screen panel, there is a problem that it is impossible to secure the flexural characteristics of the flexible touch screen panel.

Accordingly, the polarizing plate 20 according to the embodiment of the present invention removes at least one support layer provided in the existing polarizing plate in order to overcome this disadvantage, and implements the support as a material having a flexible property, or on the flexible support. It is characterized in that it is implemented by forming a coated polarizing layer.

In this case, the coated polarizing layer may be formed in various structures and methods, and for example, may be formed of a thin crystal film polarizer.

In addition, by giving a temporal phase shift (phase difference) with respect to the light polarized by the polarizing plate under the polarizing plate 20, the incident light is converted into circularly polarized light or almost circularly polarized light by left or right circularly polarized light. The retardation film 10b to be attached is attached.

In the embodiment of FIG. 3A, the retardation film 10b is a quarter-wave plane (QWP) having a retardation function, for example, polycarbonate (PC), oriented polypropylene (OPP), or polypropylene (PVA). Vinyl Alcohol) film is used as an example.

However, the retardation film may be implemented as a stacked structure of a plurality of retardation films having different retardation values in order to secure an optimal black characteristic for light transmitted through the polarizing plate 20.

That is, the embodiment of FIG. 3B is a retardation film 10c as a half-wave plane (HWP) on the retardation film 10b as the 1/4 wave plate when compared to the embodiment of FIG. 3A. This will be described as an example.

However, since the embodiment of FIG. 3B is the same as the structure of FIG. 3A except that a 1/2 wave plate is additionally provided, a detailed description thereof will be omitted.

3A and 3B, since at least one retardation film 10b, 10c is provided on the lower surface of the polarizing plate 20, the substrate 10a on which the sensing cells 51 and 61 are formed As a low retardation film having a flexible characteristic and a very low phase delay value (about 20 nm or less), it is characterized by being implemented as a non-stretched polycarbonate (PC) or a cyclic polyolefin (COP) film.

In addition, since the display device 20 and the touch screen panel have flexible characteristics, the window substrate 40 attached to the upper surface of the polarizing plate 10 in order to improve the mechanical strength is implemented with a material having flexible characteristics. desirable.

Accordingly, in the case of the embodiment of the present invention, the window substrate 40 may be made of a material such as polymethyl methacrylate (PMMA), acrylic, polyester (polyester, PET), etc., and the thickness is about It can be implemented with 0.7mm.

Next, the embodiment shown in FIGS. 4A and 4B relates to an embodiment in which the sensing electrodes 50 and 60 are formed on the same surface of the substrate 10a as in the previous embodiment of FIG. 2A, and other configurations Since the stacked structure of the elements is the same as that of the embodiment of FIG. 3A, a detailed description is omitted.

That is, the embodiment of FIG. 4A shows the first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the second surface, which is the upper surface of the substrate 10a, and the It represents a structure in which the first and second position detection lines 150 and 160 connected to the 1,2 sensing electrodes 50 and 60 are formed,

4B shows the first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the first surface, which is the lower surface of the substrate 10a, and the first and second sensing cells 51 and 61. It shows a structure in which the first and second position detection lines 150 and 160 connected to the 2 sensing electrodes 50 and 60 are formed.

However, in the embodiments of FIGS. 4A and 4B, it is described as an example that only one retardation film 10b is provided, but the retardation film may be implemented as a stacked structure of a plurality of retardation films having different phase delay values as shown in FIG. 3B. May be.

Next, the embodiment shown in FIG. 5 is a low retardation film 10a having a very low phase delay value (approximately 20 nm or less) when the substrate 10b on which the sensing electrodes are formed is compared with the embodiment of FIG. 3A. There is a difference in that it is implemented as a retardation film 10b disposed under the polarizing plate 20 instead of ).

That is, in the embodiment of FIG. 5, the first sensing cell 51 and the first connection pattern 52 constituting the first sensing electrode 50 on the first surface of the phase difference film 10b, and the first sensing electrode ( A first position detection line 150 connected to 50 is formed, and a second sensing cell 61 and a second connection pattern constituting the second sensing electrode 60 on the second surface of the retardation film 10b ( 62) and a second position detecting line 160 connected to the second sensing electrode 60 is formed.

Accordingly, in the case of the embodiment of FIG. 5, the substrate provided in the embodiment of FIG. 3a, that is, the substrate 10a implemented as a low retardation film having a very low phase delay value (about 20 nm or less) can be removed. Through this, it is possible to implement an ultra-thin flexible touch screen panel.

In this case, the retardation film 10b as a substrate on which the sensing cells 51 and 61 are formed may be implemented as a polycarbonate (PC) having a retardation function, an oriented polypropylene (OPP), or a polyvinyl alcohol (PVA) film. .

Among the components constituting the embodiment of FIG. 5, the same reference numerals are used for the same components as those of the embodiment of FIG. 3, and detailed descriptions thereof will be omitted.

In addition, the embodiment shown in FIGS. 6A and 6B relates to an embodiment in which the sensing electrodes 50 and 60 are formed on the same surface of the substrate 10b as a retardation film, as in the previous embodiment of FIG. 5. The stacked structure of the components other than that of FIG. 5 is the same as that of the embodiment of FIG. 5, so a detailed description thereof will be omitted.

That is, the embodiment of FIG. 6A shows the first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the second surface, which is the upper surface of the retardation film 10b, and the Represents a structure in which first and second position detection lines 150 and 160 connected to the first and second sensing electrodes 50 and 60 are formed,

6B shows the first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the first surface, which is the lower surface of the retardation film 10b, and the first It shows a structure in which the first and second position detection lines 150 and 160 connected to the ,2 sensing electrodes 50 and 60 are formed.

Next, the embodiment shown in FIG. 7 is the first phase difference film 10b and the phase delay value between the first phase difference film 10b on which sensing electrodes are formed and the polarizing plate 20 as compared with the previous embodiment of FIG. 5. There is a difference in that the other second phase difference film 10c is further added.

That is, for example, if the first phase difference film 10b is a quarter-wave plane (QWP) having a phase difference function, the optimal black characteristic for light transmitted through the polarizing plate 20 A second phase difference film 10c as a half-wave plane (HWP) may be further provided between the first phase difference film 10b and the polarizing plate 20 in order to secure the second phase difference film 10b.

However, among the components of the embodiment of FIG. 7, the same reference numerals are used for the same components as those of the embodiment of FIG. 5, and detailed descriptions thereof will be omitted.

In addition, the embodiment shown in FIGS. 8A and 8B relates to an embodiment in which the sensing electrodes 50 and 60 are formed on the same surface of the substrate 10b as the first phase difference film as in the previous embodiment of FIG. 7. , Since the stacked structure of the components other than that is the same as the embodiment of FIG. 7, detailed descriptions are omitted.

That is, the embodiment of FIG. 8A shows first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the second surface, which is the upper surface of the first phase difference film 10b. And first and second position detection lines 150 and 160 connected to the first and second sensing electrodes 50 and 60 are formed,

8B shows the first and second sensing cells 51 and 61 constituting the first and second sensing electrodes 50 and 60 on the first surface, which is the lower surface of the first phase difference film 10b, and the It shows a structure in which first and second position detection lines 150 and 160 connected to the first and second sensing electrodes 50 and 60 are formed.

Although the technical idea of the present invention has been described in detail according to the preferred embodiment, it should be noted that the above-described embodiment is for the purpose of explanation and not limitation. In addition, those of ordinary skill in the technical field of the present invention will appreciate that various modifications are possible within the scope of the technical idea of the present invention.

10: substrate 10a: low retardation film
10b: first phase difference film 10c: second phase difference film
20: polarizing plate 30: transparent adhesive layer
40: window substrate 50: first sensing electrode
60: second sensing electrode 100: display device
150: first position detection line 160: second position detection line

Claims (25)

A substrate having flexible characteristics;
First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
An adhesive layer provided between the polarizing plate and the substrate; And
Including at least one retardation film provided between the substrate and the polarizing plate,
Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings,
The first sensing electrodes include a plurality of first sensing cells arranged along a first direction, and first connection patterns for interconnecting the first sensing cells,
The second sensing electrodes include a plurality of second sensing cells arranged in a second direction crossing the first direction, and second connection patterns for interconnecting the second sensing cells,
The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns,
An insulating layer is disposed between the first connection patterns and the second connection patterns,
The substrate includes a 1/4 wave plate,
The at least one retardation film includes a 1/2 wavelength plate, a flexible touch screen panel. The flexible touch screen panel of claim 1, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and a nano metal conductive layer. The flexible touch screen panel of claim 1, wherein the polarizing plate comprises a film made of a polyvinyl alcohol (PVA) material having flexible properties. A substrate having flexible characteristics;
First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
An adhesive layer provided between the polarizing plate and the substrate;
At least one retardation film provided between the substrate and the polarizing plate; And
A flexible display device provided under the first and second sensing electrodes,
Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings,
The first sensing electrodes include a plurality of first sensing cells arranged along a first direction, and first connection patterns for interconnecting the first sensing cells,
The second sensing electrodes include a plurality of second sensing cells arranged in a second direction crossing the first direction, and second connection patterns for interconnecting the second sensing cells,
The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns,
An insulating layer is disposed between the first connection patterns and the second connection patterns,
The substrate includes a 1/4 wave plate,
The at least one retardation film includes a 1/2 wavelength plate,
The flexible display device is a flexible organic light emitting display device,
A flexible display device having flexible touch sensor electrodes. The flexible display device of claim 4, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers. The flexible display device of claim 4, wherein the polarizing plate includes a film made of a polyvinyl alcohol (PVA) material having flexible characteristics. A substrate having flexible characteristics;
First sensing electrodes and second sensing electrodes provided on the same surface of the substrate and including an opaque conductive material;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
A window substrate provided on the polarizing plate;
A first adhesive layer provided between the polarizing plate and the substrate;
A second adhesive layer provided between the window substrate and the polarizing plate;
At least one retardation film provided between the substrate and the polarizing plate; And
A flexible display device provided under the first and second sensing electrodes,
Each of the first and second sensing electrodes is implemented in a mesh shape including a plurality of openings,
The first sensing electrodes include a plurality of first sensing cells arranged along a first direction, and first connection patterns for interconnecting the first sensing cells,
The second sensing electrodes include a plurality of second sensing cells arranged in a second direction crossing the first direction, and second connection patterns for interconnecting the second sensing cells,
The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns,
An insulating layer is disposed between the first connection patterns and the second connection patterns,
The substrate includes a 1/4 wave plate,
The at least one retardation film includes a 1/2 wavelength plate,
The flexible display device is a flexible organic light emitting display device,
A display device including flexible touch sensor electrodes. The display device of claim 7, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers. The display device of claim 7, wherein the polarizing plate comprises a film made of a polyvinyl alcohol (PVA) material having a flexible property. A substrate having flexible characteristics;
First sensing electrodes provided on the first surface of the substrate;
Second sensing electrodes provided on a second surface of the substrate opposite to the first surface;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
An adhesive layer provided between the polarizing plate and the substrate; And
Including at least one retardation film provided between the substrate and the polarizing plate,
The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction,
The first sensing electrodes include a plurality of first sensing cells arranged along the first direction, and first connection patterns connecting the first sensing cells to each other,
The second sensing electrodes include a plurality of second sensing cells arranged along the second direction, and second connection patterns connecting the second sensing cells to each other,
The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP),
The at least one retardation film,
A first retardation film as a quarter wave plate; And
A flexible touch screen panel comprising a second retardation film as a 1/2 wavelength plate disposed between the first retardation film and the polarizing plate. The flexible touch screen panel of claim 10, wherein the substrate comprises a retardation film having a retardation value of 20 nm or less. The flexible touch screen panel of claim 10, wherein the first and second sensing electrodes comprise an opaque conductive material. The flexible touch screen panel of claim 12, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers. A substrate having flexible characteristics;
First sensing electrodes provided on the first surface of the substrate;
Second sensing electrodes provided on a second surface of the substrate opposite to the first surface;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
A flexible display device attached under the substrate;
A first adhesive layer provided between the polarizing plate and the substrate;
A second adhesive layer provided between the substrate and the flexible display device;
A window substrate provided on the polarizing plate; And
Including a third adhesive layer provided between the window substrate and the polarizing plate,
The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction,
The first sensing electrodes include a plurality of first sensing cells arranged along the first direction, and first connection patterns connecting the first sensing cells to each other,
The second sensing electrodes include a plurality of second sensing cells arranged along the second direction, and second connection patterns connecting the second sensing cells to each other,
The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP),
At least one retardation film is provided between the substrate and the polarizing plate,
The at least one retardation film,
A first retardation film as a quarter wave plate; And
Including a second retardation film as a 1/2 wavelength plate disposed between the first retardation film and the polarizing plate,
The flexible display device is a flexible organic light emitting display device,
A display device having a flexible touch screen panel. The display device of claim 14, wherein the substrate comprises a retardation film having a retardation value of 20 nm or less. The display device of claim 14, wherein the first and second sensing electrodes include an opaque conductive material. The display device of claim 16, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers. A substrate having flexible characteristics;
First sensing electrodes and second sensing electrodes provided on the same surface of the substrate;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
An adhesive layer provided between the polarizing plate and the substrate; And
Including at least one retardation film provided between the substrate and the polarizing plate,
The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction,
The first sensing electrodes include a plurality of first sensing cells arranged along the first direction, and first connection patterns connecting the first sensing cells to each other,
The second sensing electrodes include a plurality of second sensing cells arranged along the second direction, and second connection patterns connecting the second sensing cells to each other,
The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns,
An insulating layer is disposed between the first connection patterns and the second connection patterns,
The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP),
The polarizing plate is implemented as a coated polarizing layer formed of a thin crystal film polarizer,
The at least one retardation film is at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate. The flexible touch screen panel of claim 18, wherein the substrate comprises a retardation film having a retardation value of 20 nm or less. The flexible touch screen panel of claim 18, wherein the first and second sensing electrodes comprise an opaque conductive material. The flexible touch screen panel of claim 20, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers. A substrate having flexible characteristics;
First sensing electrodes and second sensing electrodes provided on the same surface of the substrate;
Position detection lines connected to one of the first and second sensing electrodes;
A polarizing plate provided on the substrate;
A first adhesive layer provided between the polarizing plate and the substrate;
A second adhesive layer provided between the substrate and the display device;
A window substrate provided on the polarizing plate;
A third adhesive layer provided between the window substrate and the polarizing plate; And
Including at least one retardation film provided between the substrate and the polarizing plate,
The first sensing electrodes are arranged in a first direction, the second sensing electrodes are arranged in a second direction crossing the first direction,
The first sensing electrodes include a plurality of first sensing cells arranged along the first direction, and first connection patterns connecting the first sensing cells to each other,
The second sensing electrodes include a plurality of second sensing cells arranged along the second direction, and second connection patterns connecting the second sensing cells to each other,
The first sensing electrodes and the second sensing electrodes cross each other between the first connection patterns and the second connection patterns,
An insulating layer is disposed between the first connection patterns and the second connection patterns,
The substrate includes at least one of polycarbonate (PC) and cyclic polyolefin (COP),
The at least one retardation film is at least one of a 1/4 wave plate, a 1/2 wave plate, and a structure in which a 1/2 wave plate is stacked on the 1/4 wave plate
The polarizing plate is implemented as a coated polarizing layer formed of a thin crystal film polarizer,
The display device is a flexible organic light emitting display device,
A display device having a flexible touch screen panel. The display device according to claim 22, wherein the substrate comprises a retardation film having a retardation value of 20 nm or less. 23. The display device of claim 22, wherein the first and second sensing electrodes comprise an opaque conductive material. The display device of claim 24, wherein the opaque conductive material is at least one of Ag, Al, Cu, Cr, Ni, and nano metal conductive layers.

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