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WO2008047971A1 - Touch screen panel and manufacturing method thereof - Google Patents

Touch screen panel and manufacturing method thereof Download PDF

Info

Publication number
WO2008047971A1
WO2008047971A1 PCT/KR2006/005063 KR2006005063W WO2008047971A1 WO 2008047971 A1 WO2008047971 A1 WO 2008047971A1 KR 2006005063 W KR2006005063 W KR 2006005063W WO 2008047971 A1 WO2008047971 A1 WO 2008047971A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
transparent conductive
touch screen
conductive film
light
Prior art date
Application number
PCT/KR2006/005063
Other languages
French (fr)
Inventor
Yong Woon Seo
Original Assignee
Itm Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Itm Inc. filed Critical Itm Inc.
Publication of WO2008047971A1 publication Critical patent/WO2008047971A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention relates to a touch screen panel of the resistance film type, in particular, to a touch screen panel of the pressure-sensitive resistance film type and manufacturing method of thereof, which is comprised of a front substrate and a rear substrate where a film is formed inside the panel to enhance the design capacity.
  • Fig. 1 is a drawing exemplifying a touch screen panel of the resistance film type.
  • Fig. 1 As shown in Fig. 1, it is comprised of a rear substrate (10) where a transparent conductive film, an electrode (20) and a dot spacer (60) are formed, a front substrate (30) where a transparent conductive film and an electrode (40) are formed, a double-sided adhesive tape (50) for attaching the front substrate to the rear substrate with an uniform gap. It has a wiring structure for inputting/outputting of a signal from the electrode (40, 20) of the front substrate and the rear substrate to the outside.
  • FIG. 2 is a drawing showing the X-Y axis substrate of a touch screen panel of the pressure-sensitive resistance film type of related art.
  • the electrode (40) for the generation of the Y-axis electric potential is symmetrically formed on the upper and the lower portion of the transparent conductive film having a predetermined resistance value, and a predetermined voltage is applied to a front and a rear electrode (40) such that an electric potential line (45) in the Y-axis direction is formed on the transparent conductive film phase (10) .
  • the potential value formed in the Y-axis direction is measured and detected through the transparent conductive film (10) of the opposing substrate.
  • the potential value formed in the X -axis direction is measured and detected through the transparent conductive film of the opposing substrate.
  • X electrode which is the opposing substrate, but X electrode is used only for measuring Y electric potential of the contact point due to the touch operation.
  • a voltage is applied to X electrode to form an equi-potential line in the X-axis direction, while Y electrode only play a role of measuring the X-axis electric potential of the opposing substrate when a voltage is not applied.
  • Fig. 3 is a drawing showing a touch screen panel of the resistance film type mounting an external fixture of related art.
  • the structure of the fixture is restrictive and has a limit of the design capacity for implementing a display unit.
  • the present invention has been made to solve the above problems by providing a touch screen panel and manufacture method thereof, which can avoid the bending of the outer shape of a front substrate and can enhance the degree of freedom of the design which can implement various designs .
  • a touch screen panel of the resistance film type which includes a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate and a second electrode for the electrical connection, wherein the front substrate and rear substrate portion are coalesced, wherein one or more opaque window frame films surrounding the side of the first transparent conductive film are formed between the first transparent conductive film and the first electrode.
  • the material used in at least one among the window frame film, the first electrode and the second electrode includes one or more materials among carbon, chrome, aluminum, nickel, stainless steel, silver, copper, gold, titanium nitride, and tin.
  • the material of the window frame film is a black coating material, while the coating material of the first electrode has silver.
  • the resistance value of the window frame film is bigger than the resistance value of the first transparent conductive film.
  • the resistance value of the window frame film ranges from 100 ⁇ /D ⁇ 100 M ⁇ /D.
  • the material of the window frame film is a black coating material, after the first electrode is coated with the material having carbon as a basic material, the first electrode is coated on it with a coating material having silver as a basic material which has a high conductivity.
  • a touch screen panel of the resistance film type includes a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate, a second electrode for the electrical connection and a wiring electrode formed on the back of the second light-transmissive substrate, wherein the front substrate and rear substrate portion are coalesced, wherein the first electrode, the second electrode and the wiring electrode are connected with a penetration hole which is filled with a plurality of conductive materials.
  • the touch screen panel of the resistance film type further includes one or more window frame film surrounding the side of the first transparent conductive film between the first transparent conductive film and the first electrode.
  • the first electrode, the second electrode and the wiring electrode are connected with a paste having silver through the penetration hole.
  • the conductive material, the first electrode, the second electrode and the contact point of the wiring electrode are made of a paste having silver.
  • a manufacturing method of a touch screen panel of the resistance film type includes forming a front substrate including a first transparent conductive film formed on a part of a first light-transmissive substrate, one or more opaque window frame films surrounding the side of the first transparent conductive film and a first electrode; forming a rear substrate including a second transparent conductive film formed on a part of a second light-transmissive substrate, one or more opaque window frame films surrounding the side of the second transparent conductive film and a second electrode; and coalescing the front substrate and the rear substrate.
  • the forming a front substrate includes forming the first transparent conductive film on the first light- transmissive substrate; forming at least one or more opaque window frame films surrounding the side on the first transparent conductive film; forming a buffer layer on the window frame film, and forming a first electrode made of a conductive coating for the electrode on the buffer layer.
  • the forming a rear substrate includes forming the second transparent conductive film on the second light- transmissive substrate; forming a plurality of penetration holes penetrating the second light-transmissive substrate and the second transparent conductive film, and forming an electrode on the second transparent conductive film; and forming a wiring electrode on the back of the second light- transmissive substrate.
  • a paste having silver is filled inside of the penetration hole to electrically connect the each electrode.
  • a conductive material is filled inside of the penetration hole, while a paste having silver is used in the contact point of the first electrode, the second electrode and the wiring electrode.
  • the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as a windows type having a beautiful window frame such that the design capacity of the touch screen can be enhanced.
  • FPCB Flexible Polyurethane
  • Printed Circuit Board connected with the electrode of the touch screen of the external power supply is provided in the back of a rear substrate such that the bending of a front substrate can be avoided and the degree of freedom of a design can be enhanced.
  • Fig. 1 is a drawing exemplifying a touch screen panel of the resistance film type of related art.
  • Fig. 2 is a drawing showing the X-Y axis substrate of a touch screen panel of the pressure-sensitive resistance film type of related art.
  • Fig. 3 is a drawing showing a touch screen panel of the resistance film type mounting an external fixture of related art.
  • Fig. 4 is a drawing showing a cross-sectional view of a touch screen panel of the resistance film type according to the present invention.
  • Fig. 5 is a drawing showing the structure of a touch screen panel having a window frame film where LCD module is adhered according to the present invention.
  • Fig. 6 is a drawing showing the manufacturing process of a front substrate of a touch screen panel of the resistance film type according to the present invention.
  • Fig. 7 is a drawing showing the manufacturing process of a rear substrate of a touch screen panel of the resistance film type according to the present invention.
  • Fig. 4 is a drawing showing a cross-sectional view of a touch screen panel of the resistance film type according to the present invention.
  • the touch screen panel of the resistance film type is comprised of a second light- transmissive substrate (10), a second transparent conductive film (20), a first light-transmissive substrate (30), a first transparent conductive film (40) , a dot spacer (60) , a first electrode (47), a second electrode (25), a penetration hole
  • the front substrate including the first light-transmissive substrate (30) , the first transparent conductive film (40) , the window frame film (45) and the first electrode (47) is adhered to the rear substrate including the second light-transmissive substrate (10) , the second transparent conductive film (20) and the second electrode (25, while the dot spacer (60) is filled between the front substrate and the rear substrate for the electrical isolation of the both electrodes.
  • the first transparent conductive film (40) is formed on the first light-transmissive substrate (30) , while the window frame film (45) of the opaque window frame form that surrounds the side is formed on the first transparent conductive film (40) . Then, the first electrode (47) generating the reference potential of the panel is formed on the window frame film (45) to implement the front substrate.
  • the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as an opaque film (45) of a window frame form such that the design capacity of the touch screen can be enhanced.
  • the transparent conductive film (40) detecting a position coordinate with the touch input as a potential value of the contact point is formed on the light-transmissive substrate (30) including PET film, while the window frame film (45) of various colors for implementing is formed on the transparent conductive film, and the electrode (47) having a low resistance is formed on the window frame film (45) by using a coating material.
  • the window frame film (45) includes a window of window frame form to implement the various forms of logos or the multi-color.
  • the resistance value of the window frame film (45) should be bigger than the resistance value of the transparent conductive film (40) which is used for the detection of the coordinate of the touch screen so as to prevent the distortion of the coordinate of the touch screen.
  • the distortion of the coordinates can be prevented by forming the window after etching the transparent conductive film of the both sides which do not include an electrode.
  • the window frame film (45) in which the resistance value is higher than the transparent conductive film (40) is formed on the transparent conductive film (40) of the front substrate, while the conductive electrode (47) is formed on the transparent conductive film
  • the conductive electrode (47) material plays a role of the electrode of the transparent conductive film (40) through the window frame film ( 45 ) .
  • the FPCB Flexible Printed Circuit Board
  • the window frame film (45) uses a black coating material
  • the first electrode (47) uses a coating material having silver.
  • the original object of the window frame film (45) is to cover the internal structure of electrodes in the panel.
  • the first electrode (47) plays a role of the electrical connection and the reference potential formation, it is preferable that silver having a high conductivity is used for the first electrode.
  • the material of the window frame film can be implemented with various colors in consideration of the design capacity and the effectiveness form and a specific motif can be used.
  • the rear substrate structure is comprised of the second light-transmissive substrate (10), the second transparent conductive film (20), the second electrode (25) and the wiring electrode (70) , while the first electrode (40) of the front substrate, the second electrode
  • the rear substrate structure (25) of the rear substrate, the second transparent conductive film (20) , and the penetration holes (55, 56) passing through the second light-transmissive substrate (10) are formed on the rear substrate structure to be electrically connected.
  • the wiring electrode (70) is formed on the back of the second light-transmissive substrate (10) , on the lowest portion of the rear substrate, to be connected with the PCB
  • the paste having silver is coated inside of the penetration holes (55,56) to electrically connect the first electrode (40), the second electrode (25) and the wiring electrode (70) . If necessary, any material that has a high conductivity can be used.
  • the conductive material fills inside of the penetration holes (55,56), while the paste having silver electrically connects only the contact point of each electrode.
  • Fig. 5 is a drawing showing the structure of a touch screen panel having a window frame film to which LCD module is adhered according to the present invention.
  • an opaque window frame film (110) is formed on a part of an inner layer of the touch screen panel in order that the electrode structure should not be shown.
  • the touch screen panel of the resistance film type is comprised of the front substrate including the first light-transmissive substrate, the first transparent conductive film, the opaque window frame film and a first electrode, and the rear substrate including the second light-transmissive substrate, the second transparent conductive film, the second electrode and the wiring electrode.
  • the front substrate and the rear substrate are attached with an adhesive cement, while the dot spacer for the electrical isolation of the front, the rear substrate electrode is filled between the gap to manufacture the touch screen panel.
  • the method for enhancing the accuracy of the position detection of the contact point through the patterning of the transparent conductive film without using the dot spacer is available.
  • Fig. 6 is a drawing showing the manufacturing process of a front substrate of a touch screen panel of the resistance film type according to the present invention.
  • a transparent conductive film (40) made of ITO is formed on a PET film (30) used as a light-transmissive substrate, while, in Fig. 6 (b) , an opaque window frame film (45) that surrounds the side is formed on the transparent conductive film (40) .
  • a buffer layer (47) between the first electrode is formed on the window frame film (45) .
  • Fig. 6(d) shows the buffer layer (47) for preventing the deformation or the difference of the color shown up on the window frame film (45) of the upper portion as the first electrode (47') is reflected into the opaque window frame film (45) .
  • the buffer layer (47) uses a coating material which has a color similar to that of the window frame film (45) .
  • Fig. 7 is a drawing showing the manufacturing process of a rear substrate of a touch screen panel of the resistance film type according to the present invention.
  • a second transparent conductive film (20) is formed on a second light-transmissive substrate (glass, etc) (10) , then, a penetration hole which is a connection hole of an electrode is formed(Fig. 7a).
  • a second electrode (25) of linear type is formed(Fig. 7b), while the wiring electrode (70) of the back of the second light-transmissive substrate (10) is formed (Fig. 7c).
  • a connecting unit connecting the wiring electrode formed in the back of the second light-transmissive substrate with the external FPCB is formed, thereby, the rear substrate of the touch screen panel of the resistance film type according to the invention is formed.
  • a penetration hole is formed in a predetermined area of the rear substrate so as to form the wiring electrode and the FPCB for the external connection on the back of the rear substrate, then, the electrode of the front substrate is electrically connected with the wiring electrode of the back of the rear substrate through the electrode connection hole of the front substrate by using the dispensing of the conductive paste or the conducting wire, and the electrode of the rear substrate is connected with the wiring of the back of the rear substrate through the contact hole.
  • a black window is formed
  • a window type is formed on the transparent conductive film of the front substrate by using the low conductive coating material of a predetermined black series, after forming a black film of high conductivity of the carbon class, through the method for forming a high conductive electrode which can play a role of the electrode, finally, the color difference of the window of the black series which is shown in the upper side of the front substrate can be removed.
  • the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as a windows type having a beautiful window frame such that the design capacity of the touch screen can be enhanced.
  • FPCB Flexible Polyurethane
  • Printed Circuit Board connected with the electrode of the touch screen of the external power supply is provided in the back of a rear substrate such that the bending of a front substrate can be avoided and the degree of freedom of a design can be enhanced.
  • a black window is formed, in case a window type is formed on the transparent conductive film of the front substrate by using the low conductive coating material of a predetermined black series, after forming a black film of high conductivity of the carbon class, through the method for forming a high conductive electrode which can play a role of the electrode, finally, the color difference of the window of the black series which is shown in the upper side of the front substrate can be removed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

Provided is a touch screen panel of the resistance film type and manufacturing method of thereof, which is comprised of a front substrate including a first light- transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate and a second electrode for the electrical connection, wherein the front substrate and rear substrate portion are coalesced, wherein one or more opaque window frame films surrounding the side of the first transparent conductive film are formed between the first transparent conductive film and the first electrode. According to the present invention, the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as a windows type having a beautiful window frame such that the design capacity of the touch screen can be enhanced. Furthermore, FPCB (Flexible Printed Circuit Board) connected with the electrode of the touch screen of the external power supply is provided in the back of a rear substrate such that the bending of a front substrate can be avoided and the degree of freedom of a design can be enhanced.

Description

[DESCRIPTION]
[invention Title]
TOUCH SCREEN PANEL AND MANUFACTURING METHOD THEREOF
[Technical Field]
The present invention relates to a touch screen panel of the resistance film type, in particular, to a touch screen panel of the pressure-sensitive resistance film type and manufacturing method of thereof, which is comprised of a front substrate and a rear substrate where a film is formed inside the panel to enhance the design capacity.
[Background Art]
Fig. 1 is a drawing exemplifying a touch screen panel of the resistance film type.
As shown in Fig. 1, it is comprised of a rear substrate (10) where a transparent conductive film, an electrode (20) and a dot spacer (60) are formed, a front substrate (30) where a transparent conductive film and an electrode (40) are formed, a double-sided adhesive tape (50) for attaching the front substrate to the rear substrate with an uniform gap. It has a wiring structure for inputting/outputting of a signal from the electrode (40, 20) of the front substrate and the rear substrate to the outside.
As to the position detection in the touch input operations, when a touch input is used on the front substrate
(30) , a mechanical contact of the transparent conductive film of the front substrate and the rear substrate (30,10) is occurred. At this time, the electric potential of the X-axis and the Y -axis formed in the contact point of the opposing substrate is respectively detected such that the position is indirectly detected. Fig. 2 is a drawing showing the X-Y axis substrate of a touch screen panel of the pressure-sensitive resistance film type of related art.
As to the formation of the electric potential in the Y-axis direction, as shown in Fig. 2 (a) , the electrode (40) for the generation of the Y-axis electric potential is symmetrically formed on the upper and the lower portion of the transparent conductive film having a predetermined resistance value, and a predetermined voltage is applied to a front and a rear electrode (40) such that an electric potential line (45) in the Y-axis direction is formed on the transparent conductive film phase (10) .
As to the detecting Y coordinate of the contact point of the front, and the rear substrate due to the touch pressure, the potential value formed in the Y-axis direction is measured and detected through the transparent conductive film (10) of the opposing substrate.
As to the measurement of the electric potential in the X-axis direction, as shown in Fig. 2 (b) , in case a predetermined voltage is applied to the both ends of the electrode (40) for the generation of the X-axis electric potential formed in the left and the right of the transparent conductive film (10) having a predetermined resistance value, an equi-potential line in the X-axis direction is formed on the transparent conductive film.
As to the detecting X coordinate of the contact point of the front and the rear substrate due to the touch pressure, the potential value formed in the X -axis direction is measured and detected through the transparent conductive film of the opposing substrate.
When the equi-potential line is formed in the Y-axis direction to detect Y coordinate, a voltage is not applied to
X electrode which is the opposing substrate, but X electrode is used only for measuring Y electric potential of the contact point due to the touch operation.
On the contrary, for detecting X coordinate, a voltage is applied to X electrode to form an equi-potential line in the X-axis direction, while Y electrode only play a role of measuring the X-axis electric potential of the opposing substrate when a voltage is not applied.
In this way, in case one substrate forms a reference voltage for detecting X coordinate or Y coordinate, the other opposing substrate plays a role of reading the potential value of the contact point formed in the other opposing substrate by turns. Generally, about 200 time per second is repeated for the continuity of the detection. Fig. 3 is a drawing showing a touch screen panel of the resistance film type mounting an external fixture of related art.
As shown in Fig. 3, when the touch screen panel is seen from the upper portion, the shape of the electrode structure or FPCB (Flexible Printed Circuit Board) for the external connection is exposed. Hence, when it is adhered to a structure including LCD module (6), a fixture (7)) having a cover structure (4) is required. Due to such fixture, various designs are limited. That is, as to the touch screen with various types, the fixture including the electrode and the wiring formed in the outer edge is visually. Therefore, when it is used by binding on the information display unit, the outside is maintained by covering the outer surface in order that the visually exposed structure is not shown.
Accordingly, there is a problem in that the structure of the fixture is restrictive and has a limit of the design capacity for implementing a display unit.
[Disclosure] [Technical Problem]
Accordingly, the present invention has been made to solve the above problems by providing a touch screen panel and manufacture method thereof, which can avoid the bending of the outer shape of a front substrate and can enhance the degree of freedom of the design which can implement various designs .
[Technical Solution] In order to accomplish the above objects, provided is a touch screen panel of the resistance film type according to an aspect of the present invention, which includes a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate and a second electrode for the electrical connection, wherein the front substrate and rear substrate portion are coalesced, wherein one or more opaque window frame films surrounding the side of the first transparent conductive film are formed between the first transparent conductive film and the first electrode.
The material used in at least one among the window frame film, the first electrode and the second electrode includes one or more materials among carbon, chrome, aluminum, nickel, stainless steel, silver, copper, gold, titanium nitride, and tin.
The material of the window frame film is a black coating material, while the coating material of the first electrode has silver.
The resistance value of the window frame film is bigger than the resistance value of the first transparent conductive film. The resistance value of the window frame film ranges from 100 Ω/D ~ 100 MΩ/D.
The material of the window frame film is a black coating material, after the first electrode is coated with the material having carbon as a basic material, the first electrode is coated on it with a coating material having silver as a basic material which has a high conductivity.
A touch screen panel of the resistance film type according to another aspect of the present invention includes a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate, a second electrode for the electrical connection and a wiring electrode formed on the back of the second light-transmissive substrate, wherein the front substrate and rear substrate portion are coalesced, wherein the first electrode, the second electrode and the wiring electrode are connected with a penetration hole which is filled with a plurality of conductive materials.
The touch screen panel of the resistance film type according to another aspect of the present invention further includes one or more window frame film surrounding the side of the first transparent conductive film between the first transparent conductive film and the first electrode. The first electrode, the second electrode and the wiring electrode are connected with a paste having silver through the penetration hole.
The conductive material, the first electrode, the second electrode and the contact point of the wiring electrode are made of a paste having silver.
A manufacturing method of a touch screen panel of the resistance film type according to further aspect of the present invention includes forming a front substrate including a first transparent conductive film formed on a part of a first light-transmissive substrate, one or more opaque window frame films surrounding the side of the first transparent conductive film and a first electrode; forming a rear substrate including a second transparent conductive film formed on a part of a second light-transmissive substrate, one or more opaque window frame films surrounding the side of the second transparent conductive film and a second electrode; and coalescing the front substrate and the rear substrate. The forming a front substrate includes forming the first transparent conductive film on the first light- transmissive substrate; forming at least one or more opaque window frame films surrounding the side on the first transparent conductive film; forming a buffer layer on the window frame film, and forming a first electrode made of a conductive coating for the electrode on the buffer layer.
The forming a rear substrate includes forming the second transparent conductive film on the second light- transmissive substrate; forming a plurality of penetration holes penetrating the second light-transmissive substrate and the second transparent conductive film, and forming an electrode on the second transparent conductive film; and forming a wiring electrode on the back of the second light- transmissive substrate.
A paste having silver is filled inside of the penetration hole to electrically connect the each electrode.
A conductive material is filled inside of the penetration hole, while a paste having silver is used in the contact point of the first electrode, the second electrode and the wiring electrode.
[Advantageous Effects]
According to the present invention, the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as a windows type having a beautiful window frame such that the design capacity of the touch screen can be enhanced. Furthermore, FPCB (Flexible
Printed Circuit Board) connected with the electrode of the touch screen of the external power supply is provided in the back of a rear substrate such that the bending of a front substrate can be avoided and the degree of freedom of a design can be enhanced.
[Brief Description of the Drawings]
Fig. 1 is a drawing exemplifying a touch screen panel of the resistance film type of related art. Fig. 2 is a drawing showing the X-Y axis substrate of a touch screen panel of the pressure-sensitive resistance film type of related art.
Fig. 3 is a drawing showing a touch screen panel of the resistance film type mounting an external fixture of related art.
Fig. 4 is a drawing showing a cross-sectional view of a touch screen panel of the resistance film type according to the present invention.
Fig. 5 is a drawing showing the structure of a touch screen panel having a window frame film where LCD module is adhered according to the present invention. Fig. 6 is a drawing showing the manufacturing process of a front substrate of a touch screen panel of the resistance film type according to the present invention.
Fig. 7 is a drawing showing the manufacturing process of a rear substrate of a touch screen panel of the resistance film type according to the present invention.
- Description of reference characters of principal elements -
10: second light-transmissive substrate
20: second transparent conductive film
25: second electrode
30: first light-transmissive substrate
40: first transparent conductive film 45: window frame film
47: first electrode
50: double-sided adhesive tape
55, 56: penetration hole. [Best Mode]
Fig. 4 is a drawing showing a cross-sectional view of a touch screen panel of the resistance film type according to the present invention. As shown in Fig. 4, the touch screen panel of the resistance film type is comprised of a second light- transmissive substrate (10), a second transparent conductive film (20), a first light-transmissive substrate (30), a first transparent conductive film (40) , a dot spacer (60) , a first electrode (47), a second electrode (25), a penetration hole
(55) connected with the first electrode and a wiring electrode (70) of the back of the second light-transmissive substrate (10) , a penetration hole (56) connected with second electrode and the wiring electrode (70) of the back of the second light-transmissive substrate, an opaque window frame film (45) that surrounds the side, and FPCB (Flexible Printed Circuit Board) (80) for the external connection.
That is, the front substrate including the first light-transmissive substrate (30) , the first transparent conductive film (40) , the window frame film (45) and the first electrode (47) is adhered to the rear substrate including the second light-transmissive substrate (10) , the second transparent conductive film (20) and the second electrode (25, while the dot spacer (60) is filled between the front substrate and the rear substrate for the electrical isolation of the both electrodes.
As shown in Fig. 4, as to the front substrate, the first transparent conductive film (40) is formed on the first light-transmissive substrate (30) , while the window frame film (45) of the opaque window frame form that surrounds the side is formed on the first transparent conductive film (40) . Then, the first electrode (47) generating the reference potential of the panel is formed on the window frame film (45) to implement the front substrate.
That is, the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as an opaque film (45) of a window frame form such that the design capacity of the touch screen can be enhanced.
Further, as to the front substrate, the transparent conductive film (40) detecting a position coordinate with the touch input as a potential value of the contact point is formed on the light-transmissive substrate (30) including PET film, while the window frame film (45) of various colors for implementing is formed on the transparent conductive film, and the electrode (47) having a low resistance is formed on the window frame film (45) by using a coating material. Here, the window frame film (45) includes a window of window frame form to implement the various forms of logos or the multi-color.
The resistance value of the window frame film (45) should be bigger than the resistance value of the transparent conductive film (40) which is used for the detection of the coordinate of the touch screen so as to prevent the distortion of the coordinate of the touch screen.
In case the resistance value of the window frame film (45) is lower than the resistance value of the transparent conductive film (40) which is used for the detection of the coordinate of the touch screen, the distortion of the coordinates can be prevented by forming the window after etching the transparent conductive film of the both sides which do not include an electrode.
It is characterized that the window frame film (45) in which the resistance value is higher than the transparent conductive film (40) is formed on the transparent conductive film (40) of the front substrate, while the conductive electrode (47) is formed on the transparent conductive film
(40) by using the coating material, thereby, the conductive electrode (47) material plays a role of the electrode of the transparent conductive film (40) through the window frame film ( 45 ) .
Further, as a means of enhancing the flatness of the beautiful window frame film (45) on the transparent conductive film (40) of the front substrate, the FPCB (Flexible Printed Circuit Board) (80) which connects the external power supply with the electrode of the touch screen is formed on the back (70) of the rear substrate such that the bending of the outer shape of the front substrate can be avoided and the degree of freedom of a design can be enhanced.
Further, it is preferable that the window frame film (45) uses a black coating material, while the first electrode (47) uses a coating material having silver.
The original object of the window frame film (45) is to cover the internal structure of electrodes in the panel.
Therefore, it is desirable to maintain an opaque state. Since the first electrode (47) plays a role of the electrical connection and the reference potential formation, it is preferable that silver having a high conductivity is used for the first electrode.
Besides, the material of the window frame film can be implemented with various colors in consideration of the design capacity and the effectiveness form and a specific motif can be used.
As shown in Fig. 4, the rear substrate structure is comprised of the second light-transmissive substrate (10), the second transparent conductive film (20), the second electrode (25) and the wiring electrode (70) , while the first electrode (40) of the front substrate, the second electrode
(25) of the rear substrate, the second transparent conductive film (20) , and the penetration holes (55, 56) passing through the second light-transmissive substrate (10) are formed on the rear substrate structure to be electrically connected.
The wiring electrode (70) is formed on the back of the second light-transmissive substrate (10) , on the lowest portion of the rear substrate, to be connected with the PCB
(Flexible Printed Circuit Board) (80) for the external connection, while the wiring electrode (70) is formed on the lower portion of the rear substrate, thereby, there is an advantage in that it can stick to an LCD module.
Here, it is preferable that the paste having silver is coated inside of the penetration holes (55,56) to electrically connect the first electrode (40), the second electrode (25) and the wiring electrode (70) . If necessary, any material that has a high conductivity can be used.
In addition, it is preferable that the conductive material fills inside of the penetration holes (55,56), while the paste having silver electrically connects only the contact point of each electrode.
[Mode for Invention]
Fig. 5 is a drawing showing the structure of a touch screen panel having a window frame film to which LCD module is adhered according to the present invention.
As shown in Fig. 5, an opaque window frame film (110) is formed on a part of an inner layer of the touch screen panel in order that the electrode structure should not be shown.
In that way, it has an advantage that a fixture needs not to be separately mounted outside the panel like the conventional touch screen panel, the degradation of the picture quality and photonic efficiency due to the gap of the LCD module (106) and the touch screen panel can be prevented by more closely adhering the LCD module (106) and the touch screen. That is, by forming the window frame film (110), the design capacity as well as the convenience of the touch input operation can be enhanced.
The manufacturing method of the touch screen panel of the resistance film type will be described with reference to the embodiment of the invention.
The touch screen panel of the resistance film type according to the embodiment of the invention is comprised of the front substrate including the first light-transmissive substrate, the first transparent conductive film, the opaque window frame film and a first electrode, and the rear substrate including the second light-transmissive substrate, the second transparent conductive film, the second electrode and the wiring electrode.
Then, the front substrate and the rear substrate are attached with an adhesive cement, while the dot spacer for the electrical isolation of the front, the rear substrate electrode is filled between the gap to manufacture the touch screen panel. The method for enhancing the accuracy of the position detection of the contact point through the patterning of the transparent conductive film without using the dot spacer is available.
Fig. 6 is a drawing showing the manufacturing process of a front substrate of a touch screen panel of the resistance film type according to the present invention.
As shown in Fig. 6 (a), a transparent conductive film (40) made of ITO is formed on a PET film (30) used as a light-transmissive substrate, while, in Fig. 6 (b) , an opaque window frame film (45) that surrounds the side is formed on the transparent conductive film (40) .
In Fig. 6(c), it is shown that a buffer layer (47) between the first electrode is formed on the window frame film (45) .
Fig. 6(d) shows the buffer layer (47) for preventing the deformation or the difference of the color shown up on the window frame film (45) of the upper portion as the first electrode (47') is reflected into the opaque window frame film (45) . At this time, the buffer layer (47) uses a coating material which has a color similar to that of the window frame film (45) .
Fig. 7 is a drawing showing the manufacturing process of a rear substrate of a touch screen panel of the resistance film type according to the present invention.
As shown in Fig. 7, a second transparent conductive film (20) is formed on a second light-transmissive substrate (glass, etc) (10) , then, a penetration hole which is a connection hole of an electrode is formed(Fig. 7a). On a part of side on the second transparent conductive film (20), a second electrode (25) of linear type is formed(Fig. 7b), while the wiring electrode (70) of the back of the second light-transmissive substrate (10) is formed (Fig. 7c).
A connecting unit connecting the wiring electrode formed in the back of the second light-transmissive substrate with the external FPCB is formed, thereby, the rear substrate of the touch screen panel of the resistance film type according to the invention is formed.
That is, as to the conventional FPCB for the external connection, a mechanical distortion was generated when the FPCB is adhered to the front substrate where the window frame film is formed with the FPCB such that the surface of the first light-transmissive substrate was twisted. However, in the present invention, such problem can be avoided with a described method. As described, a penetration hole is formed in a predetermined area of the rear substrate so as to form the wiring electrode and the FPCB for the external connection on the back of the rear substrate, then, the electrode of the front substrate is electrically connected with the wiring electrode of the back of the rear substrate through the electrode connection hole of the front substrate by using the dispensing of the conductive paste or the conducting wire, and the electrode of the rear substrate is connected with the wiring of the back of the rear substrate through the contact hole.
Particularly, in case a black window is formed, in case a window type is formed on the transparent conductive film of the front substrate by using the low conductive coating material of a predetermined black series, after forming a black film of high conductivity of the carbon class, through the method for forming a high conductive electrode which can play a role of the electrode, finally, the color difference of the window of the black series which is shown in the upper side of the front substrate can be removed.
[industrial Applicability]
According to the present invention, the part, which should be visually hidden, including an electrode structure formed on the touch screen is formed as a windows type having a beautiful window frame such that the design capacity of the touch screen can be enhanced. Furthermore, FPCB (Flexible
Printed Circuit Board) connected with the electrode of the touch screen of the external power supply is provided in the back of a rear substrate such that the bending of a front substrate can be avoided and the degree of freedom of a design can be enhanced.
Further, in case a black window is formed, in case a window type is formed on the transparent conductive film of the front substrate by using the low conductive coating material of a predetermined black series, after forming a black film of high conductivity of the carbon class, through the method for forming a high conductive electrode which can play a role of the electrode, finally, the color difference of the window of the black series which is shown in the upper side of the front substrate can be removed.

Claims

[The Scope of Claim] [Claim 1]
A touch screen panel of the resistance film type comprising: a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate and a second electrode for the electrical connection, wherein the front substrate and rear substrate portion are coalesced, wherein one or more opaque window frame films surrounding the side of the first transparent conductive film are formed between the first transparent conductive film and the first electrode.
[Claim 2] The touch screen panel of the resistance film type of claim 1, wherein the material used in at least one among the window frame film, the first electrode and the second electrode includes one or more materials among carbon, chrome, aluminum, nickel, stainless steel, silver, copper, gold, titanium nitride, and tin.
[Claim 3]
The touch screen panel of the resistance film type of claim 1, wherein the material of the window frame film is a black coating material, wherein the coating material of the first electrode has silver.
[Claim 4] The touch screen panel of the resistance film type of any one of claim 1 to 3, wherein the resistance value of the window frame film is bigger than the resistance value of the first transparent conductive film.
[Claim 5]
The touch screen panel of the resistance film type of any one of claim 1 or 3, wherein the resistance value of the window frame film ranges from 100 Ω/D ~ 100 MΩ/D.
[Claim 6]
The touch screen panel of the resistance film type of claim 1, wherein the material of the window frame film is a black coating material, after the first electrode is coated with the material having carbon as a basic material, the first electrode is coated on it with a coating material having silver as a basic material which has a high conductivity.
[Claim 7]
A touch screen panel of the resistance film type comprising: a front substrate including a first light-transmissive substrate, a first transparent conductive film laminated on the first light-transmissive substrate and a first electrode for the electrical connection; and a rear substrate including a second light-transmissive substrate, a second transparent conductive film laminated on the second light-transmissive substrate, a second electrode for the electrical connection and a wiring electrode formed on the back of the second light-transmissive substrate, wherein the front substrate and rear substrate portion are coalesced, wherein the first electrode, the second electrode and the wiring electrode are connected with a penetration hole which is filled with a plurality of conductive materials.
[Claim 8] The touch screen panel of the resistance film type of claim 7, further comprising one or more window frame film surrounding the side of the first transparent conductive film between the first transparent conductive film and the first electrode.
[Claim 9]
The touch screen panel of the resistance film type of claim 7 or 8, wherein the first electrode, the second electrode and the wiring electrode are connected with a paste having silver through the penetration hole.
[Claim 10]
The touch screen panel of the resistance film type of claim 7 or 8, wherein the conductive material, the first electrode, the second electrode and the contact point of the wiring electrode are made of a paste having silver.
[Claim 11]
A manufacturing method of a touch screen panel of the resistance film type comprising: forming a front substrate including a first transparent conductive film formed on a part of a first light-transmissive substrate, one or more opaque window frame films surrounding the side of the first transparent conductive film and a first electrode; forming a rear substrate including a second transparent conductive film formed on a part of a second light-transmissive substrate, one or more opaque window frame films surrounding the side of the second transparent conductive film and a second electrode; and coalescing the front substrate and the rear substrate.
[Claim 12]
The manufacturing method of the touch screen panel of the resistance film type of claim 11, wherein forming a front substrate includes: forming the first transparent conductive film on the first light-transmissive substrate; forming at least one or more opaque window frame films surrounding the side on the first transparent conductive film; forming a buffer layer on the window frame film, and forming a first electrode made of a conductive coating for the electrode on the buffer layer.
[Claim 13] The manufacturing method of the touch screen panel of the resistance film type of claim 11 or 12, wherein forming a rear substrate includes: forming the second transparent conductive film on the second light-transmissive substrate; forming a plurality of penetration holes penetrating the second light-transmissive substrate and the second transparent conductive film, and forming an electrode on the second transparent conductive film; and forming a wiring electrode on the back of the second light-transmissive substrate.
[Claim 14]
The manufacturing method of the touch screen panel of the resistance film type of claim 13, wherein a paste having silver is filled inside of the penetration hole to electrically connect the each electrode.
[Claim 15] The manufacturing method of the touch screen panel of the resistance film type of claim 13, wherein a conductive material is filled inside of the penetration hole, while a paste having silver is used in the contact point of the first electrode, the second electrode and the wiring electrode.
PCT/KR2006/005063 2006-10-20 2006-11-28 Touch screen panel and manufacturing method thereof WO2008047971A1 (en)

Applications Claiming Priority (2)

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KR10-2006-0102547 2006-10-20
KR1020060102547A KR100737290B1 (en) 2006-10-20 2006-10-20 Resistive touch screen panel and manufacturing method

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