KR20110029531A - Touchscreen panel remove the actual state of newton's ring and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A touch screen panel which eliminates Newton rings phenomena and a method for manufacturing the same are provided to prevent Newton rings phenomena without changing the design of the touch screen panel by forming an insulating layer with an insulating resin on the surface of a lower ITO film. CONSTITUTION: The generation of a separated space is prevented by forming an insulating layer(45) to match a surface which corresponds to separated space. The separated space is formed by a lower silver pattern electrode(50) laminated between two-sided adhesive tape layer which is adhered to a top silver pattern electrode(30) and a lower ITO(Indium Tine Oxide) film layer. The insulating layer is formed by a printing method on the surface of a lower ITO which contacts a sliver electrode pattern. The insulating layer is comprised of a compound having insulating characteristics so that an upper and lower silver pattern electrode is not applying an electric current.

Description

TOUCHSCREEN PANEL REMOVE THE ACTUAL STATE OF NEWTON'S RING AND MANUFACTURING METHOD THEREOF}

According to an embodiment of the present invention, an insulating layer such as an epoxy resin is printed on a surface of a lower ITO film by an area corresponding to a space formed on a surface where the lower silver pattern electrode and the upper silver pattern electrode are in contact with each other. By forming, the low-cost process of printing the insulating layer without changing the design of the touch screen panel, the separation space does not occur in the interlayer structure of the optical structure, and prevents the phenomenon that the ITO film and the window film turn off, Newton ring is generated The present invention relates to a touch screen panel and a method of manufacturing the same, in which the Newton ring phenomenon is eliminated.

Touch Screen Panel, an industry that is rapidly growing recently, is a new input method that can replace the input method such as a mouse or keyboard, and the user directly touches the desired information on the screen by using his / her fingers while looking at the screen. It is a new input method that can be input. Therefore, it is evaluated as the most ideal input method under the GUI (Graphical User Interface) environment because it can be easily operated by anyone, and is currently used as a mobile phone, navigation, PMP, bank teller and dispenser, public information issuing machine, guide of various tourism and major institutions. It is widely used in various fields such as equipment.

The touchscreen panel market has grown rapidly in size as Apple's iPhone began to adopt capacitive touchscreen panels in mobile phones. Especially since early this year, more mobile phone companies have applied touchscreen panels. As various new mobile phones are provided to consumers, various touch screen panels have been developed and patented and registered.

In addition, the electronic products and devices to which the touch screen panel is applied are expensive products, and in order to satisfy consumer's needs, the device should have excellent performance and no defects in appearance. In other words, expensive electronic products and devices may suffer huge losses due to minor defects from customers due to minor defects in appearance.

On the other hand, looking at the structure of a representative mobile phone as an electronic product to which a touch screen panel is applied, the conventional touch screen panel 100 is Newton's ring of the pattern of the circular comb pattern on the a and b portions as shown in FIG. The phenomenon occurs on the surface, and when looking at the side state of the touch screen panel shown in FIG. 1, as shown in FIG. 2, the portion in which the Newton ring phenomenon occurs is deformed from the window film protruding convexly upward by thermal expansion. It can be seen that the state.

As described above, the touch screen panel having the stacked structure of the optical structure in which the Newton ring phenomenon occurs is shown in FIG. 3, and has an upper OCA layer 10 (Optically Clear Adhesive Layer, hereinafter referred to as an 'OCA layer'). ITO film layer 20 (hereinafter referred to as 'ITO film layer'), upper silver pattern electrode 30, double-sided adhesive tape layer 40, lower silver pattern electrode 50, lower ITO film The layer 60, the lower OCA layer 70, and the plastic PC substrate 80 are laminated.

In addition, the conventional touch screen panel 100 having the laminated structure as described above has a Newton ring with a circular comb pattern at the top and bottom or corner portions of the touch screen, which are the marked parts of a and b ( The Newton's ring phenomenon occurs to deteriorate the image quality, and this phenomenon occurs during the manufacturing process, as shown in FIG. 3, the length of the width of the upper silver pattern electrode 30 and the lower silver pattern electrode 50. The separation space of the portion B is formed by the difference in the length of the width).

And the deformation is transferred to the window film layer (not shown in the figure) laminated to the outside of the ITO film layer or the upper OCA layer 10 is transformed by the space generated as described above or to produce a touch screen panel 2 by the expansion of the ITO film or the window film by the deformation of the internal space that the air escaped through the air passage (thin space between the silver pattern electrode) between the inside and outside of the touch screen panel during the process As shown in the figure, bending occurs on the upper surface of the Newton's ring.

On the other hand, the mobile phone to which the touch screen panel is applied has a Newton's ring phenomenon of a circular comb pattern at the top, bottom and corners of the touch screen by the interlayer structure of the conventional optical structure as described above. By degrading the quality, various technologies have been developed and patented as a way to improve the above problems.

Looking at the contents of the domestic patent application, in the case of Korean Laid-Open Patent Publication No. 2002-0079438, as shown in Figure 4 of the light emitting device 52 and the touch screen formed on the other surface of the transparent sheet 102 A transparent sheet 102 having a touch sensing element 14, which is made of a transparent material such as glass or plastic, and is mechanically bonded to both the light emitting element 52 and the touch sensing element 14. Although a touch screen display panel 100 of a structure having a thickness sufficient to provide a support is known, in the case of this patent, a transparent sheet 102 is laminated between the touch screen display panel and the LCD to improve the Newton ring phenomenon. By using the expensive film in a way that the internal structure of the touch screen display panel is partially modified to increase the manufacturing cost Depending on the load stack is laminated structure complicated as the sheet 102, the view area (Area View), the transmittance is reduced, such as in there is a possibility a problem that change in optical properties.

In the case of Korean Patent Publication No. 10-0594481, as shown in FIG. 5, the upper film 120, the transparent electrode film 110, the lower substrate 5, the optical structure 160, and the display device 150 are formed. In a touch panel device having a stacked structure, a Newton ring phenomenon occurs even when the optical structure 160 is bent by applying a non-gloss or matte process 62 to the upper portion of the optical structure 160. Although the structure is improved to prevent the surface from being treated, the non-gloss surface as described above has a surface treatment treated to increase the surface roughness for light scattering, that is, for example, a touch screen in a fluorine atmosphere. The glass used for the substrates of the glass is complicated by the heat treatment or plasma treatment of the surface, which not only causes the manufacturing cost to increase, but also reduces the transmittance in the view area. There was a concern that the problem of changing the chemical characteristics would occur.

The Newton ring phenomenon occurring in the touch screen panel is a problem that loses the value of expensive electronic products, but in the related industry, mainly research and development on the functionality of the touch screen panel is actively progressed, and appearance defects Techniques for improvement have not been developed yet.

Therefore, in order to improve the above problems, the present invention provides an insulating resin such as epoxy resin on the surface of the lower ITO film as much as an area corresponding to the space formed on the surface where the lower silver pattern electrode and the upper silver pattern electrode are in contact with each other. By forming an insulation layer by a simple printing method or a corresponding method, the separation between the optical structure layers in a simple and low-cost manner that only adds the insulation layer by printing without changing the design of the touch screen panel. The present invention provides a touch screen panel and a method of manufacturing the same, in which the Newton ring phenomenon is eliminated by filling the space and preventing the occurrence of Newton's ring phenomenon by preventing the separation space caused by the printing step. Make it a task.

In addition, the present invention forms an insulation layer (Insulation Layer) by a simple printing method using an insulating resin such as an epoxy resin on the surface of the lower ITO film as described above, and referred to as a double adhesive tape (DAT). By covering the insulating layer to prevent the air inside the silver pattern electrode from escaping to the outside, the ITO film and the window film are prevented from turning off, thereby changing the optical characteristics in the view area of the touch screen panel. Another object of the present invention is to provide a touch screen panel and a method of manufacturing the same, in which the Newton ring phenomenon is eliminated.

The present invention for achieving the above object is stacked in the order of the upper OCA layer, the upper ITO film layer, the upper silver patternon electrode, double-sided adhesive tape layer, lower silver patternon electrode, lower ITO film, lower OCA layer and a plastic PC substrate In the touch screen panel having a structure,

The insulation layer is formed to have an area corresponding to the separation space formed by the lower silver pattern electrode stacked between the double-sided adhesive tape layer adhered to the upper silver pattern electrode and the lower ITO film layer so that the separation space does not occur. The touch screen panel from which the Newton ring phenomenon is removed is a problem solving means.

In addition, according to the present invention, the lower panel having a structure in which the lower silver pattern electrode, the lower ITO film layer, the lower OCA layer, and the plastic PC substrate are stacked in the order of using a compound having an insulating property is disposed along the four peripheries of the lower silver pattern electrode. Forming an insulating layer on the surface of the film layer,

The upper panel having a structure laminated in the order of the upper OCA layer, the upper ITO film layer and the upper silver pattern electrode is a step of adhering a double-sided adhesive tape to the surface of the upper silver pattern electrode to form an adhesive tape layer;

And another method for solving the problem is a manufacturing method of a touch screen panel from which the Newton ring phenomenon is removed, which is manufactured by a process of adhering the upper panel and the lower panel.

However, in the present invention, the insulating layer is selected from epoxy resin, polyurethane resin, silicone resin, insulating ink, and tapes, which are compounds having insulating properties, so as not to conduct electricity between the upper silver electrode pattern and the lower silver pattern electrode. It is desirable to form,

In addition, the insulating layer is a dry thickness is 5 to 20% thicker than the thickness of the lower silver pattern electrode, the width is preferably formed between the lower silver pattern electrode and the V / A interface.

Accordingly, the present invention provides an insulating layer by printing or correspondingly printing an insulating compound, such as an epoxy resin, on the surface of the lower ITO film by an area corresponding to the space formed on the surface where the lower silver pattern electrode and the upper silver pattern electrode are in contact with each other. By forming an Insulation Layer, it not only fills the spaces between layers of optical structures in a low cost and simple way, but only adds an insulation layer by printing without changing the design of the touch screen panel. Therefore, the Newton ring phenomenon is prevented from occurring, and the air inside the touch screen panel is prevented from escaping to the outside, so that the ITO film and the window film are turned off, and thus the optical characteristics of the touch area of the touch screen panel are reduced. Appearance of touch screen panel by improving image quality without change It can enlarge its application in various types of electronic devices is expected that the demand will be further expanded as fundamentally resolve the amount.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, Figures 6 to 8, and the same reference numerals are denoted for the components performing the same function. On the other hand, in the drawings and detailed description showing and referring to the configuration and operation that can be easily understood by those skilled in the art from a general touch screen panel is briefly or omitted. In particular, although the size ratio between the elements in the drawings of the drawings are expressed slightly different or the size between the components that are coupled to each other is expressed, the representation of such drawings is easily understood by those skilled in the art The descriptions are omitted since they are possible parts.

In the present invention, the term 'ITO film layer', 'window film layer' and 'adhesive tape layer' are used in the context of the description. It should be understood that it can be used interchangeably.

In the present invention, Figure 6 is a cross-sectional view showing a laminated structure of the touch screen panel to remove the Newton ring phenomenon according to the present invention, Figure 7 is a plan view showing the lower silver pattern electrode in the lower panel according to the present invention 8 is a plan view showing the upper silver pattern electrode to appear in the upper panel according to the present invention.

The touch screen panel in which the Newton ring phenomenon is removed according to the present invention has a structure in which the upper OCA layer 10, the upper ITO film layer 20, and the upper silver pattern electrode 30 are stacked in this order, as shown in FIG. 6. An upper panel and a lower panel having a structure in which a lower silver pattern electrode 50, a lower ITO film layer 60, a lower OCA layer 70, and a plastic PC substrate 80 are stacked in this order. The upper panel is made of a structure bonded to each other using a double-sided adhesive tape (40).

The upper and lower OCA layers 10 and 70 may be formed by using the optically clear adhesive (OCA), the upper and lower ITO film layers 20 and 60, the plastic PC substrate 80, and the window film layer, respectively. In the figure, a layer laminated on top of the upper OCA layer) is a layer for bonding.

In addition, the ITO film layer is a layer coated with indium tin oxide (Indium Tin Oxide) on the film, and when the external pressure is applied on the touch screen, the upper and lower ITO film layers 20 and 60 come into contact with each other and connect with electric signals. Do it.

In addition, in the present invention, the flexible circuit board (not shown in the drawing) is an anisotropic conductive film (ACF) bonded to the upper and lower ends of the flexible circuit board of the portion connected to the upper and lower silver pattern electrodes (30, 50) (Not shown in the drawing), the conductive ball is burst by the pressure and the current flows between the flexible circuit board and the upper and lower silver pattern electrodes (30, 50), the above configuration is a conventional technique Since it is not a feature of the present invention, description thereof will be omitted.

Accordingly, the touch screen panel in which the Newton ring phenomenon is removed according to the present invention includes an upper OCA layer 10, an upper ITO film layer 20, an upper silver patternon electrode 30, a double-sided adhesive tape layer 40, and a lower silver patternon electrode. In the touch screen panel 100 made of a stacked structure in order of 50, the lower ITO film layer 60, the lower OCA layer 70 and the plastic PC substrate 80,

An insulating layer corresponding to an area corresponding to a space formed by the lower silver pattern electrode 50 stacked between the double-sided adhesive tape layer 40 adhered to the upper silver pattern electrode 30 and the lower ITO film layer 60. It is characterized in that the structure is formed so that the separation space 45 does not occur.

As shown in FIG. 3, the conventional touch screen panel has a lower silver pattern electrode stacked between the length of the double-sided adhesive tape layer 40 adhered to the upper silver pattern electrode 30 and the lower ITO film layer 60. The Newton's ring phenomenon occurs in the touch screen panel due to the deformation of the ITO film or the window film due to the separation space formed by the difference in the length of the width 50, whereas the present invention is illustrated in FIG. 6. As described above, Newton's ring phenomenon occurs by preventing the deformation of the ITO film or the window film (not shown) by forming the insulating layer 45 as much as the area corresponding to the separation space so as not to generate the separation space. It can prevent to do.

In the present invention, the insulating layer 45 is an epoxy resin, a polyurethane resin, a silicone resin, an insulating ink, a compound having an insulating property so as not to be energized between the upper silver electrode pattern 30 and the lower silver pattern electrode 50. It is preferable to select one of the tapes and to form the surface of the lower ITO film layer 60 in contact with the upper silver electrode pattern 30 by a printing method.

The method for forming the insulating layer 45 in the present invention is to form an insulating layer by a conventional printing method such as screen printing, gravure printing, etc. in a method that can easily form the insulating layer by a conventional printing method. In addition to the printing method defined above, printing by various methods is possible.

In addition, the insulating layer 45 has a dry thickness of 5-20% thicker than the thickness of the lower silver pattern electrode 50, and the length of the width is as long as the length between the lower silver pattern electrode 50 and the V / A interface. It is preferable to form.

In the above description, the V / A (View Area) boundary surface is a boundary surface of a position as shown in FIG. 6, and means a boundary surface between the frame of the touch screen and the lower LCD screen.

Therefore, in the present invention, when the thickness of the insulating layer 45 is thinner than the thickness of the lower silver pattern electrode 50 or the width thereof is shorter than the range defined above, the ITO film is turned off due to shrinkage of the insulating layer. Alternatively, the window film (not shown in the drawing) may be deformed to cause a Newton's ring phenomenon. If the width exceeds the above-defined range, transmittance or the like may be disturbed in the view area. There is a risk of deterioration of image quality.

In general, the thickness of the upper and lower silver pattern electrodes 30 and 50 is preferably 10 to 15 μm, and the thickness of the double-sided adhesive tape layer 40 is preferably 70 to 90 μm. In addition to the dimensions of the limited thickness can be applied.

In addition, in the touch screen panel from which the Newton ring phenomenon according to the present invention is removed, an area corresponding to the separation space formed by the lower silver pattern electrode laminated between the double-sided adhesive tape layer adhered to the upper silver pattern electrode and the lower ITO film layer is provided. The method of forming the insulating layer will be described in detail below.

According to an embodiment of the present invention, a lower panel having a structure in which the lower silver pattern electrode, the lower ITO film layer, the lower OCA layer, and the plastic PC substrate are laminated in the order of using a compound having an insulating property is shown in FIG. Forming an insulating layer 45 along four peripheries of 50);

As shown in FIG. 8, the upper panel of the top panel having the structure of the upper OCA layer, the upper ITO film layer, and the upper silver patternon electrode is bonded to the surface of the upper silver pattern electrode 30 to bond the double-sided adhesive tape to the adhesive tape layer ( 40),

In addition, a touch screen panel 100 having a Newton ring phenomenon removed by a process of adhering the upper panel and the lower panel is manufactured.

As described above, in the lower panel according to the present invention, when the insulating layer 45 is applied and formed by a printing method, a Newton ring phenomenon occurs due to the phenomenon that the ITO film layer or the window film layer is turned off, or the flexible circuit board and the lower silver It is possible to prevent air from flowing out of the upper silver pattern electrode 30 through the bonding part 55 which the pattern electrode 50 is in contact with, and prevent the film from sagging at the corner portion, thereby preventing the Newton ring phenomenon from occurring. .

In addition, in the upper panel according to the present invention, as shown in FIG. 8, the double-sided adhesive tape layer 40 is sufficiently extended so that the double-sided adhesive tape layer 40 of the upper panel is insulated from the lower panel when the upper panel and the lower panel are bonded. The layer 45 may be sufficiently covered to further prevent air from flowing in and out of the upper silver patternon electrode 30 through the bonding part 55 to prevent the film from sagging, thereby generating a Newton ring phenomenon. You can prevent it.

Since the method of forming the insulating layer 45 in the present invention has been described in detail above, the description thereof will be omitted.

The touch screen panel according to the present invention manufactured according to the above method does not generate a Newton ring phenomenon because no space is generated in the interlayer structure of the optical structure, and the air inside the silver pattern electrode does not flow in or out. Since the film layer is not turned off, the optical quality is not changed in the view area and the image quality is improved.

As described above, the touch screen panel according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely described, for example, and various changes and modifications within the scope without departing from the technical spirit of the present invention. It will be appreciated by those skilled in the art that this is possible.

1 is a view showing a portion in which a Newton ring phenomenon occurs in a touch screen in a conventional touch screen panel;

FIG. 2 is a view showing a state in which a portion in which a Newton ring phenomenon occurs in the touch screen of the touch screen panel of FIG. 1 is convexly deformed;

3 is a cross-sectional view showing a plane taken along the line AA ′ of FIG. 1;

4 is a cross-sectional view of a laminated structure of a conventional touch screen panel;

5 is a cross-sectional view of a laminated structure of another conventional touch screen panel;

6 is a cross-sectional view of a laminated structure of a touch screen panel with the Newton ring phenomenon removed according to the present invention;

7 is a plan view showing the lower silver pattern electrode in the lower panel according to the present invention;

8 is a plan view showing the upper silver pattern electrode appears in the top panel according to the present invention.

Explanation of symbols on the main parts of the drawings

100: touch screen panel 10: upper OCA layer

20: upper ITO film layer 30: upper silver pattern electrode

40: double-sided adhesive tape layer 45: insulating layer

50: lower silver pattern electrode 55: bonding portion

60: lower ITO film layer 70: lower OCA layer

80: Plastic PC Board

Claims (7)

In the touch screen panel consisting of a laminated structure of the upper OCA layer, the upper ITO film layer, the upper silver pattern electrode, the double-sided adhesive tape layer, the lower silver pattern electrode, the lower ITO film, the lower OCA layer and the plastic PC substrate, The insulation layer is formed to have an area corresponding to the separation space formed by the lower silver pattern electrode stacked between the double-sided adhesive tape layer adhered to the upper silver pattern electrode and the lower ITO film layer so that the separation space does not occur. Touch screen panel, characterized in that the Newton ring phenomenon is removed. The method of claim 1, The insulating layer is a touch screen panel to remove the Newton ring phenomenon, characterized in that formed by the printing method on the surface of the lower ITO film layer in contact with the upper silver electrode pattern. The method according to claim 1 or 2, The insulating layer is formed by selecting one type from among epoxy resin, polyurethane resin, silicone resin, insulating ink, and tapes, which are compounds having insulating properties, so as not to conduct electricity between the upper silver electrode pattern and the lower silver pattern electrode. Touch screen panel that eliminates the Newton ring phenomenon. The method according to any one of claims 1 to 3, The insulating layer has a dry thickness of 5-20% thicker than the thickness of the lower silver patternon electrode, and the width of the Newton ring phenomenon is formed as long as the length between the lower silver patternon electrode and the V / A interface. Removed touch screen panel. The lower panel having a structure in which the lower silver pattern electrode, the lower ITO film layer, the lower OCA layer, and the plastic PC substrate are laminated in the order of the surface of the lower ITO film layer along the four peripheries of the lower silver pattern electrode using a compound having an insulating property. Forming an insulating layer in the The upper panel having a structure laminated in the order of the upper OCA layer, the upper ITO film layer and the upper silver pattern electrode is a step of adhering a double-sided adhesive tape to the surface of the upper silver pattern electrode to form an adhesive tape layer; And a process of adhering the top panel and the bottom panel to remove the Newton ring phenomenon. The method of claim 5, The insulating layer is selected from epoxy resin, polyurethane resin, silicone resin, insulating ink, and tapes having insulating properties, and the screen printing and gravure printing on the surface of the lower ITO film layer in contact with the upper silver electrode pattern. Method of manufacturing a touch screen panel from which the Newton ring phenomenon is removed, which is formed by the same conventional printing method. The method according to any one of claims 5 to 6, The insulating layer has a dry thickness of 5-20% thicker than the thickness of the lower silver patternon electrode, and the width of the Newton ring phenomenon is formed as long as the length between the lower silver patternon electrode and the V / A interface. Method of manufacturing a touch screen panel removed.

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