Abstract:
Disclosed herein are a touch screen panel and a portable electronic apparatus having the same. The touch screen panel includes: a cover layer having an outer surface touched by a touch unit and an inner surface, which is an opposite surface to the outer surface; a first scattering layer formed on an inner surface of the cover layer to scatter light passing through the cover layer; an electrode pattern spaced apart from the first scattering layer and formed as a predetermined fine pattern so that capacitance around a touch point at which the touch unit touches the outer surface is changed; and a second scattering layer formed between the first scattering layer and the electrode pattern to scatter light.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the benefit of Korean Patent Application No. 10-2012-0123674, filed on Nov. 2, 2012, entitled “Touch Screen Panel and Portable Electronic Apparatus Having the Same”, which is hereby incorporated by reference in its entirety into this application. 
       BACKGROUND OF THE INVENTION 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to a touch screen panel and a portable electronic apparatus having the same. 
         [0004]    2. Description of the Related Art 
         [0005]    In accordance with the growth of computers using a digital technology, devices assisting computers have also been developed, and personal computers, portable transmitters and other personal information processors execute processing of text and graphics using various input devices such as a keyboard and a mouse. 
         [0006]    In accordance with the rapid advancement of an information-oriented society, the use of computers has more and more been widened; however, it is difficult to efficiently operate products using only a keyboard and a mouse currently serving as an input device. Therefore, the necessity for a device that is simple, has less malfunction, and is capable of easily inputting information has increased. 
         [0007]    In addition, current techniques for input devices have progressed toward techniques related to high reliability, durability, innovation, designing and processing beyond the level of satisfying general functions. To this end, a touch panel has been developed as an input device capable of inputting information such as text, graphics, or the like. 
         [0008]    This touch panel is mounted on a display surface of an image display device such as an electronic organizer, a flat panel display device including a liquid crystal display (LCD) device, a plasma display panel (PDP), an electroluminescence (El) element, or the like, and a cathode ray tube (CRT) to thereby be used to allow a user to select desired information while viewing the image display device. 
         [0009]    Meanwhile, the touch panel is classified into a resistive type touch panel, a capacitive type touch panel, an electromagnetic type touch panel, a surface acoustic wave (SAW) type touch panel, and an infrared type touch panel. These various types of touch panels are adapted for electronic products in consideration of a signal amplification problem, a resolution difference, a level of difficulty of designing and processing technologies, optical characteristics, electrical characteristics, mechanical characteristics, resistance to an environment, input characteristics, durability, and economic efficiency. Currently, the resistive type touch panel and the capacitive type touch panel have been prominently used in a wide range of fields. 
         [0010]    In this touch panel, an electrode pattern is generally made of an indium tin oxide (ITO). However, the ITO has low electrical conductivity and is expensive since indium used as a raw material thereof is a rare earth metal. In addition, the indium is expected to be depleted within the next decade, such that it may not be smoothly supplied. In addition, the electrode pattern of the ITO has low durability in that brittle fracture is easily generated. 
         [0011]    For the above-mentioned reason, US patent Laid-Open Publication No. 20100007619 entitled “Touch Panel, Liquid Crystal Display Screen Using the Same, and Methods for Making the Touch Panel and the Liquid Crystal Display Screen” and filed on Jul. 2, 2009, has disclosed a structure in which an electrode is formed using a carbon nano tube. 
         [0012]    However, the carbon nano tube is also expensive. In addition, at the time of forming an electrode pattern using the carbon nano tube, very high precision is required, such that a manufacturing cost increases. Therefore, it is advantageous in view of a manufacturing cost to form an electrode pattern using a relatively cheap metal. However, in the case of using a metal electrode pattern, light is reflected on a metal in a touch screen panel, such that the metal electrode pattern is visually recognized by a user. 
         [0013]    Therefore, a technology of allowing the metal electrode pattern not to be visually recognized at the outside in spite of using the metal electrode pattern has been urgently demanded. 
       PRIOR ART DOCUMENT  
     Patent Document 
       [0014]    (Patent Document 1) US Patent Laid-open Publication No. 20100007619: “Touch Panel, Liquid Crystal Display Screen Using the Same, and Methods for Making the Touch Panel and the Liquid Crystal Display Screen” 
       SUMMARY OF THE INVENTION 
       [0015]    The present invention has been made in an effort to provide a touch screen panel allowing an electrode pattern not to be visually recognized at the outside in spite of forming the electrode pattern using a cheap metal material. 
         [0016]    Further, the present invention has been made in an effort to provide a portable electronic apparatus capable of increasing a resolution of a display recognized by a user since an electrode pattern is not visually recognized at the outside. 
         [0017]    According to a preferred embodiment of the present invention, there is provided a touch screen panel including: a cover layer having an outer surface touched by a touch unit; a first scattering layer formed on an inner surface of the cover layer to scatter light passing through the cover layer; an electrode pattern spaced apart from the first scattering layer and detecting a capacitance change at a touch point at which the touch unit touches the outer surface; and a second scattering layer formed between the first scattering layer and the electrode pattern to scatter light. 
         [0018]    At least one surface of the first or second scattering layer may be formed as a rough surface. 
         [0019]    The electrode pattern may include first and second electrode patterns disposed to be spaced apart from each other, and the second scattering layer may be formed to scatter light reflected on the first or second electrode pattern. 
         [0020]    The touch screen panel may further include a transparent substrate disposed to be adjacent to the first scattering layer, wherein the first and second electrode patterns are formed on both surfaces of the transparent substrate, respectively. 
         [0021]    The touch screen panel may further include first and second transparent substrates sequentially disposed from the first scattering layer, wherein the first and second electrode patterns are formed on the first and second transparent substrates, respectively. 
         [0022]    The touch screen panel may further include a protection layer protecting the cover layer. 
         [0023]    The protection layer may include a hard coating layer. 
         [0024]    The hard coating layer may be made of any one of acrylic, epoxy, and urethane, or a combination thereof. 
         [0025]    The touch screen panel may further include a wiring connected to the electrode pattern; and a controlling unit detecting the touch point based on a signal received from the wiring. 
         [0026]    The scattering layer may be made of a polycrystalline transparent material. 
         [0027]    The scattering layer may be made of SiO 2  or SiN. 
         [0028]    According to another preferred embodiment of the present invention, there is provided a portable electronic apparatus including: a touch screen panel detecting a touch point touched by a touch unit; a processor receiving an output signal from the touch screen panel to interpret a user input and performing an operation according to the interpreted user input; and a display controlled by the processor, wherein the touch screen panel includes: a cover layer having an outer surface touched by the touch unit; a first scattering layer formed on an inner surface of the cover layer to scatter light passing through the cover layer; an electrode pattern spaced apart from the first scattering layer and detecting a capacitance change at a touch point at which the touch unit touches the outer surface; and a second scattering layer formed between the first scattering layer and the electrode pattern to scatter light. 
         [0029]    At least one surface of the first or second scattering layer may be formed as a rough surface. 
         [0030]    The electrode pattern may include first and second electrode patterns disposed to be spaced apart from each other, and the second scattering layer may be formed to scatter light reflected on the first or second electrode pattern. 
         [0031]    The touch screen panel may further include a transparent substrate disposed to be adjacent to the first scattering layer, wherein the first and second electrode patterns are formed on both surfaces of the transparent substrate, respectively. 
         [0032]    The touch screen panel may further include first and second transparent substrates sequentially disposed from the first scattering layer, wherein the first and second electrode patterns are formed on the first and second transparent substrates, respectively. 
         [0033]    The touch screen panel may further include a protection layer protecting the cover layer. 
         [0034]    The protection layer may include a hard coating layer. 
         [0035]    The hard coating layer may be made of any one of acrylic, epoxy, and urethane, or a combination thereof. 
         [0036]    The touch screen panel may further include: a wiring connected to the electrode pattern; and a controlling unit detecting the touch point based on a signal received from the wiring. 
         [0037]    The scattering layer may be made of a polycrystalline transparent material. 
         [0038]    The scattering layer may be made of SiO 2  or SiN. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0039]    The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
           [0040]      FIGS. 1A and 1B  are cross-sectional views of a touch screen panel according to first and second preferred embodiment of the present invention; 
           [0041]      FIGS. 2A and 2B  are cross-sectional views of a touch screen panel according to third and fourth preferred embodiment of the present invention; 
           [0042]      FIGS. 3A and 3B  are plan views in which a cover glass is removed from the touch screen panel shown in  FIGS. 2A and 2B ; 
           [0043]      FIGS. 4A and 4B  are cross-sectional views of a touch screen panel according to fifth and sixth preferred embodiment of the present invention; 
           [0044]      FIG. 5  is a view showing a process in which light incident from the outside is scattered in the touch screen panel according to the first preferred embodiment of the present invention; and 
           [0045]      FIG. 6  is an enlarged view of a touch screen panel embedded in a portable electronic apparatus according to a seventh preferred embodiment of the present invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0046]    The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant descriptions thereof are omitted. Further, in the following description, the terms “first”, “second”, “one side”, “the other side” and the like are used to differentiate a certain component from other components, but the configuration of such components should not be construed to be limited by the terms. Further, in the description of the present invention, when it is determined that the detailed description of the related art would obscure the gist of the present invention, the description thereof will be omitted. 
         [0047]    Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. 
         [0048]      FIGS. 1A and 1B  are cross-sectional views of a touch screen panel according to first and second preferred embodiment of the present invention. 
         [0049]    Referring to  FIG. 1A , the touch screen panel  100  according to the first preferred embodiment of the present invention is configured to include a cover layer  190 , first and second scattering layers  150  and  160 , a first transparent substrate  110 , an electrode pattern  130 , and an adhesive layer  180 . 
         [0050]    As shown in  FIG. 1A , an outer surface, which is an upper portion of the cover layer  190 , is touched by a touch unit  197 . In addition, an inner surface, which is a lower portion of the cover layer  190  is provided with the first scattering layer  150 . The first scattering layer  150  primarily scatters light incident from the outside of the cover layer  190 . Therefore, light reflected from the electrode pattern  130  is scattered. A process in which the light is scattered in the first scattering layer  150  will be described below with reference to  FIG. 5 . 
         [0051]    The first transparent substrate  110  is a support serving to provide a region in which the electrode pattern  130  and an electrode wiring  135  are to be formed. Here, the first transparent substrate  110  needs to have support force capable of supporting the electrode patterns  130  and transparency capable of allowing the user to recognize the image provided by an image display device. In consideration of the support force and the transparency described above, the first transparent substrate  110  may be made of polyethylene terephthalate (PET), polycarbonate (PC), poly methyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES), a cyclic olefin polymer (COC), a triacetylcellulose (TAC) film, a polyvinyl alcohol (PVA) film, a polyimide (PI) film, polystyrene (PS), biaxially oriented polystyrene (BOPS; containing K resin), glass, tempered glass, or the like, but is not necessarily limited thereto. 
         [0052]    After the first transparent substrate  110  is formed on the first scattering layer  150 , the second scattering layer  160  is formed on the first transparent substrate  110 . Light passing through the first scattering layer  150  in the light incident from the outside is scattered once more in the second scattering layer  160 . In addition, light reflected on the electrode pattern  130  is again scattered while sequentially passing through the second scattering layer  160  and the first scattering layer  150 . Therefore, the electrode pattern  130  is not recognized at the outside. 
         [0053]    The adhesive layer  180  serves to adhere the touch screen panel  100  to a display device (not shown). 
         [0054]    In  FIG. 1A , the electrode pattern  130  may be formed as a mesh pattern on one surface of the first transparent substrate  110 . However, a scheme of forming the electrode pattern is not limited thereto, and will be described below. 
         [0055]    Next, referring to  FIG. 1B , the touch screen panel  100  according to the second preferred embodiment of the present invention is configured to include a cover layer  190 , first and second scattering layers  150  and  160 , a first transparent substrate  110 , an electrode pattern  130 , and an adhesive layer  180 . In the present specification, similar members will be denoted by similar reference numerals. In addition, for simplification of the specification, an overlapped description of the same component will be omitted in the present specification. 
         [0056]    Components of the touch screen panel shown in  FIG. 1B  are similar to those of the touch screen panel shown in  FIG. 1A  except for the second scattering layer  160 . In the second scattering layer  160  shown in  FIG. 1B , a first surface  165  contacting the electrode pattern  130  is formed as a rough surface. Although the case in which only the first surface  165  of the second scattering layer  160  is formed as the rough surface is shown in  FIG. 1B , the present invention is not limited thereto. Rather, an opposite surface to the first surface  165  may be formed as the rough surface or both surfaces of the second scattering layer  160  may be formed as the rough surface. Furthermore, one surface and the other surface of the first scattering layer  150  as well as the second scattering layer  160  may also be formed as the rough surface. 
         [0057]    Referring to  FIG. 1B , light is scattered while passing through the first and second scattering layers  150  and  160 . However, the entire light is not scattered. That is, there may still be light passing through the scattering layers. However, in the case in which the scattering layer has the rough surface, the passed light is not constantly refracted on a contact surface between the scattering layer and a layer adjacent thereto. Therefore, it is possible to prevent the passed light from arriving at the electrode pattern  130 , and it is possible to further prevent the light reflected on the electrode pattern  130  from passing through the cover layer  190 . 
         [0058]    In  FIGS. 1A and 1B , it is preferable that the touch screen panel  100  has transmissivity of 85% or more so that a user may recognize an image provided by an image display device included in a portable electronic apparatus. In addition, it is preferable that the electrode pattern  130  is adjusted to have an aperture ratio of 95% or more in order to implement the transmissivity of the touch screen panel  100  of 85% or more. 
         [0059]      FIGS. 2A and 2B  are cross-sectional views of a touch screen panel according to third and fourth preferred embodiment of the present invention. 
         [0060]    Referring to  FIG. 2A , the touch screen panel  100  according to the third preferred embodiment of the present invention is configured to include a cover layer  190 , first to third scattering layers  150 ,  160  and  170 , first and second transparent substrates  110  and  120 , first and second electrode patterns  130  and  140 , and an adhesive layer  180 . 
         [0061]    As shown in  FIG. 2A , an inner surface, which is a lower portion of the cover layer  190  is provided with the first scattering layer  150 . The first scattering layer  150  scatters light incident from the outside of the cover layer  190  and light reflected from the first electrode pattern  130 . 
         [0062]    The touch screen panel shown in  FIG. 2A  includes two transparent substrates  110  and  120  and three scattering layers  150 ,  160 , and  170  unlike the touch screen panel shown in  FIG. 1A . The first electrode pattern  130  is formed on one surface of the first transparent substrate  110 , and the second electrode pattern  140  is formed on one surface of the second transparent substrate  120 . In addition, the first and second transparent substrates  110  and  120  each having the above-mentioned electrode patterns formed thereon contact each other by the adhesive layer  180  as shown in  FIG. 2A . 
         [0063]    As described above, the touch screen panel shown in  FIG. 2A  may be used as a self-capacitive type touch screen panel or a mutual capacitive type touch screen panel since the first and second electrode patterns  130  and  140  are spaced from each other. 
         [0064]    Again referring to  FIG. 2A , the second scattering layer  160  is formed on the first electrode pattern  130 , and the third scattering layer  170  is formed on the second electrode pattern  140 . Therefore, light reflected on the first and second electrode patterns  130  and  140  is scattered in the scattering layers formed on the respective electrode patterns and is again scattered in the first scattering layer. As a result, it is possible to prevent the light reflected on the first and second electrode patterns  130  and  140  from being discharged to the outside of the cover layer  190  to thereby be visually recognized by the user. 
         [0065]    Next, referring to  FIG. 2B , the touch screen panel  100  according to the fourth preferred embodiment of the present invention is configured to include a cover layer  190 , first to third scattering layers  150 ,  160  and  170 , first and second transparent substrates  110  and  120 , first and second electrode patterns  130  and  140 , and an adhesive layer  180 . 
         [0066]    Components of the touch screen panel shown in  FIG. 2B  are similar to those of the touch screen panel shown in  FIG. 2A  except for the third scattering layer  170 . In the third scattering layer  170  shown in  FIG. 2B , both of a first surface  174  contacting the second electrode pattern  140  and a second surface  172  contacting the adhesive layer  180  are formed as a rough surface. Although the case in which both surfaces  172  and  174  of the third scattering layer  170  are formed as the rough surface is shown in  FIG. 2B , the present invention is not limited thereto. Rather, only any one surface of the third scattering layer  170  may also be formed as the rough surface. 
         [0067]    Referring to  FIG. 2B , light is scattered while passing through the first and second scattering layers  150  and  160 . Further, the light passing through the first and second scattering layers  150  and  160  is scattered once again by the third scattering layer  170  before it arrives at the second electrode pattern  140 . In addition, the light reflected on the second electrode pattern  140  is again scattered while sequentially passing through the third scattering layer  170 , the second scattering layer  160 , and the first scattering layer  150 . In addition, since the third scattering layer  170  has the rough surfaces, the passed light is not constantly refracted on a contact surface between the scattering layer and a layer adjacent thereto. 
         [0068]    Therefore, it is possible to prevent the passed light from arriving at the second electrode pattern  140 , and it is possible to further prevent the light reflected on the second electrode pattern  140  from passing through the cover layer  190 . 
         [0069]    In  FIGS. 2A and 2B , the first and second electrode patterns  130  and  140 , which generate signals at the time of being touched by the user to serve to allow a touch coordinate to be recognized, are formed on the first and second transparent substrates  110  and  120 , respectively. Fine patterns of the first and second electrodes  130  and  140  will be described below with reference to  FIGS. 3A and 3B . 
         [0070]      FIGS. 3A and 3B  are plan views in which a cover glass is removed from the touch screen panel shown in  FIGS. 2A and 2B . 
         [0071]    First and second wirings  135  and  145 , which are connected to the first and second electrode patterns  130  and  140 , respectively, to serve to receive electrical signals, is formed on the same plane as a plane on which the first and second electrode patterns  130  and  140  are formed, respectively. 
         [0072]    Here, the first wiring  135  may be formed integrally with the first electrode pattern  130 , and the second wiring  145  may be formed integrally with the second electrode pattern  140 . As described above, the first wiring  135  is formed integrally with the first electrode pattern  130 , and the second wiring  145  is formed integrally with the second electrode pattern  140 , thereby making it possible to simplify a manufacturing process and decrease a lead time. 
         [0073]    In addition, since a bonding process between the first and second wirings  135  and  145  and the first and second electrode patterns  130  and  140  may be omitted, problems such as step generation or a bonding defect between the first and second wirings  135  and  145  and the first and second electrode patterns  130  and  140  may be prevented in advance. However, the first and second wirings  135  and  145  are not necessarily formed integrally with the first and second electrode patterns  130  and  140 , but may also be formed separately from the first and second electrode patterns  130  and  140  using a conductive polymer, a carbon black (including a carbon nano tube), a metal oxide, metals, or the like. 
         [0074]    Meanwhile, sheet resistance of the first electrode pattern  130  or sheet resistance of the second electrode pattern  140  may become 150 Ω/cm 2  or less by adjusting a thickness of the electrode pattern or adjusting a material of the electrode pattern so as to be appropriate for the touch screen panel  100 . More specifically, the sheet resistance of the first and second electrode patterns  130  and  140  may be 0.1 to 50 Ω/cm 2 . However, this numerical value is provided for illustrative purpose. Therefore, the sheet resistance of the first and second electrode patterns  130  and  140  is not necessarily limited to the above-mentioned numerical value. 
         [0075]    It is preferable that a line width W of fine patterns of the first and second electrode patterns  130  and  140  is 3 μm or more in order to prevent the sheet resistance from becoming excessively high and is 7 μm or less in order to prevent the electrode pattern from being visually recognized by the user. As a result, the line width W of the fine patterns of the first and second electrode patterns  130  and  140  is, preferably, 3 to 7 μm, but is not necessarily limited thereto. 
         [0076]    In addition, the fine pattern of the first electrode pattern  130  and the fine pattern of the second electrode pattern  140  may have a mesh structure in which rectangles, rhombuses, circles, or ovals are repeated. That is, both of the fine patterns of the first and second electrode patterns  130  and  140  may have the mesh structure in which they intersect with each other as a lattice pattern. Meanwhile, as shown in an enlarged view of  FIG. 3A , a line width X and a pitch P (an interval between wirings adjacent to each other) of each of the first and second wirings  135  and  145  may be 50 μm or less, respectively. In addition, the first and second electrode patterns  130  and  140  may be patterned as various patterns such as a bar type pattern, a tooth type pattern, a diamond type pattern, or the like. 
         [0077]    In the case in which the first and second electrode patterns  130  and  140  are patterned as the bar type pattern, they may be formed in directions perpendicular to each other. In addition, if necessary, any one of the first and second electrode patterns  130  and  140  may be patterned as a bar type pattern having a relatively wide width, and the other thereof may be patterned as a bar type pattern having a relatively narrow width. 
         [0078]    Further, in the case in which the first and second electrode patterns  130  and  140  are patterned as the tooth type pattern, they may be formed of various triangles that are in parallel with each other in one direction. In addition, the first electrode patterns  130  may be configured to be inserted between the second electrode patterns  140  and the second electrode patterns  140  may be configured to be inserted between the first electrode patterns  130  so that the first and second electrode patterns  130  and  140  are not overlapped with each other. 
         [0079]    Further, in the case in which the first and second electrode patterns  130  and  140  are patterned as the diamond type pattern, they may be configured of a sensing part (not shown) and a connecting part (not shown), respectively, and be connected to each other through the connecting part in directions perpendicular to each other. In addition, the sensing part of the first electrode pattern  130  and the sensing part of the second electrode pattern  140  may be disposed so as not to be overlapped with each other. 
         [0080]    However, as described above, the first and second electrode patterns  130  and  140  are patterned as the bar type pattern, the tooth type pattern, or the diamond type pattern, which is illustrative rather than restrictive. Therefore, the first and second electrode patterns  130  and  140  may be patterned as all patterns known in the art. 
         [0081]    In addition, a thickness of the first electrode pattern  130  or a thickness of the second electrode pattern  140  is not particularly limited, but may be 10 μm or less in order to secure appropriate transmissivity. It is more advantageous in securing appropriate transmissivity that the thickness of the first electrode pattern  130  or the thickness of the second electrode pattern  140  is 2 μm or less. 
         [0082]    Additionally, as shown in  FIG. 3B , the transparent substrate  110  may be provided with a controlling unit  195 , which is a kind of controller. Here, the first and second wirings  135  and  145  are directly connected to the controlling unit  195  provided on the transparent substrate  110 . As described above, since the first and second wirings  135  and  145  are directly connected to the controlling unit  195  provided on the transparent substrate  110 , a flexible printed circuit board according to the prior art may be omitted. For example, the controlling unit  195  may include a first controlling unit  193  provided on one surface of the transparent substrate  110  and a second controlling unit  197  provided on the other surface of the transparent substrate  110 . Here, the first wiring  135  is connected to the first controlling unit  193 , and the second wiring  145  is connected to the second controlling unit  197 . 
         [0083]      FIGS. 4A and 4B  are cross-sectional views of a touch screen panel according to fifth and sixth preferred embodiment of the present invention. 
         [0084]    Referring to  FIG. 4A , the touch screen panel  100  according to the fifth preferred embodiment of the present invention is configured to include a cover layer  190 , first to third scattering layers  150 ,  160  and  170 , a transparent substrate  110 , first and second electrode patterns  130  and  140 , and first and second adhesive layers  180  and  185 . 
         [0085]    As described above, the first scattering layer  150  formed on a lower portion of the cover layer  190  scatters light incident from the outside of the cover layer  190  and light reflected from the first and second electrode patterns  130  and  140 . 
         [0086]    The touch screen panel shown in  FIG. 4A  includes one transparent substrate  110  and two adhesive layers  180  and  185  unlike the touch screen panel shown in  FIG. 2A . The first adhesive layer  180  is formed between the first and second scattering layers  150  and  160 , and the second adhesive layer  185  is formed between the second scattering layer  160  and the transparent substrate  110 . Particularly, the second adhesive layer  185  helps to allow the second scattering layer  160  and the first electrode  130  or the first adhesive layer  180  and the transparent substrate  110  to contact each other. 
         [0087]    In  FIG. 4A , the first and second electrode patterns  130  and  140  are formed on both surfaces of the transparent substrate  110 , respectively. The first electrode pattern  130  is formed on an upper surface of the transparent substrate  110 , and the second electrode pattern  140  is formed on a lower surface of the transparent substrate  110 . Here, the second and third scattering layers  160  and  170  are formed on the first and second electrode patterns  130  and  140 , respectively. Therefore, light reflected on the first and second electrode patterns  130  and  140  is scattered in the scattering layers formed on the respective electrode patterns and is again scattered in the first scattering layer. As a result, it is possible to prevent the light reflected on the first and second electrode patterns  130  and  140  from being discharged to the outside of the cover layer  190  to thereby be visually recognized by the user. 
         [0088]    Next, referring to  FIG. 4B , the touch screen panel  100  according to the sixth preferred embodiment of the present invention is configured to include a cover layer  190 , first to third scattering layers  150 ,  160  and  170 , a transparent substrate  110 , first and second electrode patterns  130  and  140 , and first and second adhesive layers  180  and  185 . 
         [0089]    Components of the touch screen panel shown in  FIG. 4B  are similar to those of the touch screen panel shown in  FIG. 4A  except for the third scattering layer  170 . In the third scattering layer  170  shown in  FIG. 4B , both of a first surface  174  contacting the second electrode pattern  140  and a second surface  172  contacting the transparent substrate  110  are formed as a rough surface. Although the case in which both surfaces  172  and  174  of the third scattering layer  170  are formed as the rough surface is shown in  FIG. 4B , the present invention is not limited thereto. Rather, only any one surface of the third scattering layer  170  may also be formed as the rough surface. 
         [0090]    Referring to  FIG. 4B , light is scattered while passing through the first and second scattering layers  150  and  160 . Further, the light passing through the first and second scattering layers  150  and  160  is scattered once again by the third scattering layer  170  before it arrives at the second electrode pattern  140 . In addition, the light reflected on the second electrode pattern  140  is again scattered while sequentially passing through the third scattering layer  170 , the second scattering layer  160 , and the first scattering layer  150 . In addition, since the third scattering layer  170  has the rough surfaces, the passed light is not constantly refracted on a contact surface between the scattering layer and a layer adjacent thereto. Therefore, it is possible to prevent the passed light from arriving at the second electrode pattern  140 , and it is possible to further prevent the light reflected on the second electrode pattern  140  from passing through the cover layer  190 . 
         [0091]      FIG. 5  is a view showing a process in which light incident from the outside is scattered in the touch screen panel according to the first preferred embodiment of the present invention. For convenience of explanation, the case in which the light is incident to the touch screen panel  100  shown in  FIG. 1A  at an incidence angle A is described by way of example. However, it is to be noted that this is provided for illustration, and the present invention is not limited thereto. 
         [0092]    In  FIG. 5 , the touch screen panel  100  includes the cover layer  190 , the first and second scattering layers  150  and  160 , the transparent substrate  110 , the electrode pattern  130 , and the adhesive layer  180 . 
         [0093]    A portion of light incident to the cover layer  190  at an incidence angle A is reflected at a reflection angle B. When a surface of the cover layer  190  is not the rough surface, the incidence angle A is the same as the reflection angle B. In addition, a portion of the incident light is refracted and progresses into the cover layer  190 . In this case, a refraction angle C may be determined by a refractive index of the outside of the cover layer  190  and a refractive index of the cover layer  190 . For convenience of explanation, it is assumed that the refractive index of air of the outside of the cover layer  190  is 1.003 and the refractive index of the cover layer  190  is 1.5. It is obvious that this does not limit the present invention. 
         [0094]    In this case, the refraction angle C is smaller than the incidence angle A. As described above, refractive light passing through the cover layer  190  arrives at a boundary surface between the cover layer  190  and the first scattering layer  150 . 
         [0095]    However, the first scattering layer  150  includes SiO 2 , SiN, or the like, to irregularly scatter the incident light. 
         [0096]    Therefore, the incident light arriving at the boundary surface between the cover layer  190  and the first scattering layer  150  is irregularly scattered, such that it has a difficulty in arriving at the first electrode pattern  130 . As described above, when the first scattering layer  150  has the rough surface, the light incident to the rough surface will be more irregularly scattered. 
         [0097]    In addition, the scattered light arrives at the second scattering layer  160  to thereby be additionally scattered in the second scattering layer  160 . Therefore, only a portion of the light incident to the cover layer  190  may arrive at the first electrode pattern  130  and be reflected on the first electrode pattern  130 . 
         [0098]    In this case, the reflected light is again scattered while passing through the second scattering layer  160 , and the light passing through the second scattering layer  160  is additionally scattered while passing through the first scattering. Therefore, finally, only a very small portion of the light incident to the cover layer  190  will be reflected on the first electrode pattern  130  and then discharged to the outside of the cover layer  190 . Therefore, it is difficult for the user to visually recognize existence of the first electrode pattern  130 . 
         [0099]      FIG. 6  is an enlarged view of a touch screen panel embedded in a portable electronic apparatus according to a seventh preferred embodiment of the present invention. 
         [0100]      FIG. 6  shows a general portable electronic apparatus  300  such as a smart phone or a smart pad. In addition,  FIG. 6  shows a cross-sectional view of a touch screen panel configuring a portion of a display  200  included in the portable electronic apparatus  300 . 
         [0101]    The portable electronic apparatus  300  includes a processor (not shown) receiving an output signal from the touch screen panel to interpret a user input and performing an operation according to the interpreted user input and the display  20  controlled by the processor. The display  200  included in the portable electronic apparatus  300  shown in  FIG. 6  includes a touch screen panel sensing a touch by the user. 
         [0102]    The portable electronic apparatus  300  may include all electronic apparatuses according to the prior art that may be operated by the touch by the user. Therefore, for simplification of the specification, an additional description of the portable electronic apparatus will be omitted. 
         [0103]    Referring to an enlarged cross-sectional view, the touch screen panel included in the portable electronic apparatus  300  includes the cover layer  190 , the first and second scattering layers  150  and  160 , the first transparent substrate  110 , the electrode pattern  130 , and the adhesive layer  180 . As shown in  FIG. 6 , the first scattering layer  150  formed on the lower portion of the cover layer scatters the light incident from the outside and the light reflected from the first electrode pattern  130 . 
         [0104]    In addition, the first electrode pattern  130  is formed on one surface of the first transparent substrate  110 , and the second electrode pattern  140  is formed on one surface of the second transparent substrate  120 . In addition, the first and second transparent substrates  110  and  120  each having the above-mentioned electrode patterns formed thereon contact each other by the adhesive layer  180  as shown in  FIG. 6 . 
         [0105]    Further, the second scattering layer  160  is formed on the first electrode pattern  130 , and the third scattering layer  170  is formed on the second electrode pattern  140 . Therefore, light reflected on the first and second electrode patterns  130  and  140  is scattered in the scattering layers formed on the respective electrode patterns and is again scattered in the first scattering layer. As a result, it is possible to prevent the light reflected on the first and second electrode patterns  130  and  140  from being discharged to the outside of the cover layer  190  to thereby be visually recognized by the user. 
         [0106]    At least one surface of each of the first to third scattering layers  150 ,  160 , and  170  may be formed as the rough surface to additionally scatter the light, as described above. 
         [0107]    In addition, a protection layer (not shown) may be provided on the cover layer. The protection layer, which serves to protect the cover layer, may be formed of, for example, a hard coating layer. Particularly, the hard coating layer may be made of any one of acrylic, epoxy, and urethane, or a combination thereof. 
         [0108]    According to the preferred embodiments of the present invention, the scattering layers are formed on the cover glass and the metal electrode pattern to scatter the light reflected on the metal electrode pattern, thereby making it possible to allow the metal electrode pattern not to be visually recognized at the outside. 
         [0109]    In addition, according to the preferred embodiments of the present invention, the scattering layer formed on the metal electrode pattern scatters the light reflected on the metal electrode pattern, thereby making it possible to prevent an image output in the display device from being hindered. 
         [0110]    Although the embodiments of the present invention have been disclosed for illustrative purposes, it will be appreciated that the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention. 
         [0111]    Accordingly, any and all modifications, variations or equivalent arrangements should be considered to be within the scope of the invention, and the detailed scope of the invention will be disclosed by the accompanying claims.