KR20130127658A - Protection film applied design oriented film and touch window included the protection film - Google Patents

Abstract

The present invention relates to a method for manufacturing a protection film applied to a touch window. The purpose of the present invention save production costs. The embodiment of the present invention, a touch window having the protection film includes a transparent window, a bonding material layer formed on one surface of the transparent window, and a protection film having a printing panel.

Description

PROFITION FILM APPLIED DESIGN ORIENTED FILM AND TOUCH WINDOW INCLUDED THE PROTECTION FILM}

The present invention relates to a method for manufacturing a protective film applied to the touch window.

The touch window may be a cathode ray tube (CRT), a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) And an electro luminescence device (ELD), and is a device for inputting predetermined information to an electronic device by pressing a touch panel while a user views the image display device.

1 is a cross-sectional view showing the structure of a touch window according to the prior art.

As shown in FIG. 1, the touch window includes a transparent window (Window, 10), a print pattern unit 20 having a print pattern under the transparent window 10, and a touch sensor module under the print pattern unit 20. do. The touch sensor module (TSP; Touch Screen Panel) is an upper OCA (Optically Clear Adhesive) film 30, an upper electrode layer (ITO; Indium Tin Oxide, 31), an insulator layer 40, a lower OCA film (below) 50, it is common to have a structure of the lower electrode layer 51. The lower electrode layer 51 is adhered to the liquid crystal module (LCD) with the insulator layer 60 and the double-sided tape 70.

However, in the touch window, since the printing pattern part 20 is formed between the transparent window 10 and the touch sensor module, uniformity decreases. If the printed pattern portion 20 is formed in a laminated structure, it is difficult to realize the optimum pitch of the bezel portion printed electrode due to the printing step, and the pin hole, the protrusion, and the dent Due to the low uniformity characteristics due to the printing, printing problems occur in implementing a direct patterned window (DPW).

In addition, a touch sensor module including two OCA films has a disadvantage in that the thickness (a) of the touch window is made thick.

In addition to printing black-colored materials such as BM (Black Matrix) or carbon black ink with a low printing frequency, printing other colors such as white (2-5 degrees printing) with relatively high printing frequency The disadvantage is that it is difficult.

In one embodiment of the present invention by forming a printed pattern portion on one surface of the protective film, by directly adhering the protective film to a transparent window, it is possible to replace only the protective film without discarding the transparent window in case of poor printing, thereby reducing the production cost It provides a protective film and a touch window provided with the protective film.

One embodiment of the present invention by forming an electrode pattern on the other surface of the protective film, there is no need to use the OCA film for forming the electrode pattern can reduce the thickness of the touch window, the protective film and the touch window provided with the protective film To provide.

An embodiment of the present invention provides a touch window provided with the protective film and the protective film, which can reduce the light loss by directly forming the printing pattern portion on one surface of the protective film.

One embodiment of the present invention by forming a printing pattern on one side of the protective film, by forming an electrode pattern on the other side, the protective film is directly attached to the transparent window to simplify the manufacturing process, the protective film and the protective film is provided Provides a touch window.

The touch window according to an embodiment of the present invention is a transparent window, an adhesive material layer applied to one surface of the transparent window, and a protective film is bonded to the transparent window through the adhesive material layer, the print pattern is provided on one surface Include.

The protective film may include a sensing electrode having an electrode pattern formed on the other surface thereof.

The protective film may be formed of any one of a hard coat film, an AG film, an AR film, or an LR film.

The adhesive material layer may be formed of any one of PSA, DPSA, or WAA.

The transparent window may be formed of any one of tempered glass, semi-tempered glass, or soda lime glass.

The protective film according to an embodiment of the present invention includes a print pattern part having a print pattern on one surface, and a sensing electrode on which an electrode pattern is formed on the other surface.

The protective film may further include an adhesive material layer for adhering the printed pattern portion and the transparent window to one surface thereof.

At least two printed pattern parts may be stacked, and a stepped structure may be formed at an end of the printed pattern to be stacked.

The print pattern part may have a length in which the length of the first print pattern formed on the one surface is shorter than the length of the second print pattern formed under the first print pattern, so that the second print pattern covers the first print pattern. have.

The sensing electrode may be formed of any one material of ITO, IZO, ZnO, carbon nanotubes, graphene, Ag nanowires, or a conductive polymer.

According to an embodiment of the present invention, by forming a printing pattern portion on one surface of the protective film, by directly adhering the protective film to the transparent window, in case of poor printing, only the protective film can be replaced without discarding the transparent window, thus producing costs Can reduce the cost.

According to one embodiment of the present invention, by forming the electrode pattern on the other surface of the protective film, it is not necessary to use the OCA film for forming the electrode pattern can reduce the thickness of the touch window.

According to one embodiment of the invention, by directly forming the printed pattern portion on one surface of the protective film, it is possible to reduce the light loss.

According to one embodiment of the present invention, by forming a printing pattern on one surface of the protective film, and by forming an electrode pattern on the other surface, the manufacturing process is simplified by directly adhering the protective film to the transparent window.

1 is a cross-sectional view showing the structure of a touch window according to the prior art.
2 is a cross-sectional view showing a touch window including a protective film to which DOF is applied according to an embodiment of the present invention.
3 is a cross-sectional view showing the structure of a protective film according to an embodiment of the present invention.
4 and 5 are cross-sectional views showing the structure of a protective film according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

2 is a cross-sectional view showing a touch window including a protective film to which DOF is applied according to an embodiment of the present invention.

Referring to FIG. 2, the touch window is bonded to the transparent window 100 through the transparent window 100, the adhesive material layer 200 applied to one surface of the transparent window 100, and the adhesive material layer 200. It may include a protective film 400, and a touch sensor module is provided in the print pattern portion 300.

That is, the printed pattern unit 300 may be integrally formed with the protective film 400, and may be bonded to the transparent window 100 through the adhesive material layer 200. In this case, when the print pattern part 300 is defective, only the protective film 400 may be replaced without replacing the transparent window 100, thereby lowering the production cost.

In an embodiment, the adhesive material layer 200 may be formed of any one of pressure sensitive adhesive (PSA), stacked PS adhesives (DPSA), and water activated adhesives (WAA). Preferably, the adhesive material layer 200 may be formed of PSA.

In addition, the protective film 400 may include a sensing electrode 500 having an electrode pattern formed on the other surface thereof. The sensing electrode 500 is one of constituting the touch sensor module.

In general, the touch sensor module (TSP) has a structure of an upper OCA (Optically Clear Adhesive) film, an upper electrode pattern, a lower OCA film, and a lower electrode pattern under the OCA film, and a lower electrode pattern. The liquid crystal module is attached to the LCD.

By the way, the protective film 400 of the present invention by forming the upper electrode pattern of the touch sensor module on the other surface, it is possible to reduce the overall thickness (b) of the touch window. That is, the touch sensor module forms an upper electrode pattern and a lower electrode pattern, respectively, using two OCA films. In the present invention, the upper electrode pattern 500 is directly formed on the protective film 400, so that the touch sensor module is formed. What is necessary is just to form a lower electrode pattern in one OCA film.

For reference, one OCA film is about 50-100 μm, and one insulator layer is about 50 μm. On the other hand, the adhesive material layer 200 used in the present invention is about 6 ~ 7μm, the protective film 400 is about 100μm. Therefore, in comparison with the related art (a) of FIG. 1, the overall thickness b of the touch window may be reduced from a minimum of 35 μm to a maximum of 135 μm.

Therefore, the protective film 400 may include the sensing electrode 500 having the electrode pattern formed integrally therewith. The protective film 400 may be formed of any one of a hard coating film, an anti glare (AG) film, an anti reflective (AR) film, or a low reflective (LR) film. Preferably, the protective film 400 may be formed of an AR film.

After forming the insulator layer 600 under the sensing electrode 500, and forming the lower electrode pattern 710 with the OCA film 700 under the insulator layer 600, the liquid crystal module with double-sided tape 800. It can be bonded with.

For example, the sensing electrode 500 may have a first electrode pattern formed in a horizontal direction, and the lower electrode pattern 710 formed on the OCA film 700 may have a second electrode pattern formed in a vertical direction. Alternatively, the sensing electrode 500 may be a second electrode pattern formed in the vertical direction, and the lower electrode pattern 710 formed on the OCA film 700 may be a first electrode pattern formed in the horizontal direction. That is, the sensing electrode 500 and the lower electrode pattern 710 which are integrally formed with the protective film 400 correspond to each other and become one touch sensor module.

In an embodiment, the transparent window 100 may be one of tempered glass reinforced by about 40 μm in up, down, left, and right, semi-tempered glass strengthened to a depth of 40 μm or less (20 μm ± 15 μm), or soda-lime glass. Can be formed.

3 is a cross-sectional view showing the structure of a protective film according to an embodiment of the present invention.

Referring to FIG. 3, the protective film 300 includes a printing pattern part 300 having a printing pattern on one surface, and a sensing electrode 500 on which an electrode pattern is formed on the other surface. The protective film 300 may further include an adhesive material layer (not shown) for adhering the printed pattern portion 300 and the transparent window 100 to one surface thereof.

Conventionally, the printing pattern portion is formed between the transparent window and the touch sensor module, the printing pattern portion is in direct contact with the sensing electrode, there was a problem that the defective rate is high in forming the electrode wiring in the printing pattern portion. However, when the printed pattern portion 300 is formed on one surface of the protective film 200 and the sensing electrode 500 is formed on the other surface, the printed pattern portion 300 does not directly touch the sensing electrode 500 as in the present invention. Therefore, difficulty in implementing the optimum pitch of the wiring part due to pin-holes, protrusions, and dents of the printed pattern part 300 may be solved.

The print pattern unit 300 may be formed to correspond to a dead area (D / A) of the touch sensor module.

The sensing electrode 500 may be formed of indium-tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), carbon nanotube (CNT), graphene, graphene, Ag nanowires (Ag NW), or conductive polymers. The electrode pattern may be formed of any one material.

4 and 5 are cross-sectional views showing the structure of a protective film according to another embodiment of the present invention.

Referring to FIG. 4, at least two printed pattern units 300 provided in the protective film 400 may be stacked, and a stepped structure may be formed at ends of the stacked printed patterns. That is, in the print pattern unit 300, the length of the first print pattern 302 formed on the protective film 400 may be longer than the length of the second print pattern 301 formed on the first print pattern 302. .

For example, when the print pattern 300 is stacked in a multi-layer structure (3 or more), the print pattern unit 300 has the longest length of the lowermost printed pattern according to the stacking order, and the lengths are sequentially formed to form a step toward the top. It is possible to implement a printing pattern with a short forming structure. This is to solve the adhesion defect (the empty space is formed and the air layer is formed) between the end portion of the printing pattern and the adhesive material layer 200 generated due to the thickness of the printing pattern in the close contact with the adhesive material layer 200. It can be effective.

Referring to FIG. 5, the printing pattern unit 300 includes two printing patterns on one surface of the protective film 400, but the length of the first printing pattern 302 formed on one surface of the protective film 400 is zero. Since the length of the second printed pattern 301 formed on the first printed pattern 302 is shorter, the second printed pattern 301 may be formed to cover the first printed pattern 302. This is to minimize the air region generated between the printed pattern portion 300 and the adhesive material layer 200 formed on one surface of the protective film 400, to improve the bonding force between the protective film 400 and the transparent window 100 will be.

In an embodiment, the printing pattern unit 300 is formed by stacking printing patterns sequentially stacked in a stepped structure, and forming surface roughness on the surface of each printing pattern, or applying surface roughness to the top layer to provide an adhesive material. Adhesion with the layer 200 may be improved.

The touch window according to the present invention can be attached to various display devices. That is, the display device may be not only a liquid crystal display but also an organic light emitting display device, a plasma display panel, or the like. At this time, in order to prevent noise components generated by driving the display device from being transmitted to the touch sensor module, that is, the touch screen panel, to cause a malfunction of the touch sensing panel, a shielding layer may be selectively disposed between the touch sensing panel and the display device. Layer can also be arranged.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

300: printing pattern portion
400: protective film
500: sensing electrode

Claims (10)

Transparent windows;
An adhesive material layer applied to one surface of the transparent window; And
The protective film is bonded to the transparent window through the adhesive material layer, the protective film is provided on one surface
Touch window comprising a.
The method of claim 1,
The above-
A touch window comprising a sensing electrode on which the electrode pattern is formed on the other surface.
The method of claim 1,
The above-
A touch window formed of any one of a hard coating film, an anti glare (AG) film, an anti reflective (AR) film, or a low reflective (LR) film.
The method of claim 1,
The adhesive material layer
A touch window formed of any one of PSA (Pressure Sensitive Adhesive), DPSA (Detackified PS Adhesives), or WAA (Water Activated Adhesives).
The method of claim 1,
The transparent window,
A touch window formed of any one of tempered glass, semi-tempered glass, or soda-lime glass.
A print pattern unit having a print pattern on one surface; And
Sensing electrode with electrode pattern formed on other surface
Protective film comprising a.
The method according to claim 6,
An adhesive material layer for bonding the printed pattern portion and the transparent window to the one surface
Protective film comprising more.
The method according to claim 6,
The print pattern portion,
At least two or more laminated, the protective film, the stepped structure is formed at the end of the printed pattern to be laminated.
The method according to claim 6,
The print pattern portion,
The length of the first print pattern formed on the one surface is shorter than the length of the second print pattern formed below the first print pattern, the second print pattern is formed in a structure covering the first print pattern.
The method according to claim 6,
The sensing electrode,
ITO (Indium-tin oxide), IZO (Indium Zinc Oxide), ZnO (Zinc Oxide), carbon nanotube (CNT), graphene (Graphene), Ag nanowires (Ag NW) or a conductive polymer The electrode pattern is formed, the protective film.

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