WO2007043756A1 - Line structure of capacitive type touch panel for securing linearity - Google Patents

Line structure of capacitive type touch panel for securing linearity Download PDF

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Publication number
WO2007043756A1
WO2007043756A1 PCT/KR2006/003814 KR2006003814W WO2007043756A1 WO 2007043756 A1 WO2007043756 A1 WO 2007043756A1 KR 2006003814 W KR2006003814 W KR 2006003814W WO 2007043756 A1 WO2007043756 A1 WO 2007043756A1
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WO
WIPO (PCT)
Prior art keywords
touch panel
linearity
correction
correction pattern
transparent conductive
Prior art date
Application number
PCT/KR2006/003814
Other languages
French (fr)
Inventor
Min Goo Kang
Jae Young Park
Seung Hyun Kim
Original Assignee
Digitech Systems Co., Ltd
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 Digitech Systems Co., Ltd filed Critical Digitech Systems Co., Ltd
Publication of WO2007043756A1 publication Critical patent/WO2007043756A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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

Definitions

  • the present invention relates to a wiring structure of a capacitive type touch panel for securing linearity, and more particularly to a wiring structure of a capacitive type touch panel, in which an etched third correction pattern is formed in addition to first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to secure reliability, and a SiO coating solution is uniformly over-coated through spin coating on the surfaces of the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer to protect a conductive coating layer of the touch panel, thereby securing durability and correctly detecting a touch point irrespective of the degree of conductivity of an object touching the touch panel.
  • Peripheral devices of the computer have been developed along with the development of a computer using digital technology.
  • the computer peripheral devices include a monitor, a keyboard, a mouse, a microphone, a speaker and so on.
  • the keyboard and the microphone are used to input external data to the computer.
  • the keyboard inputs data in a manner that keys are pushed and the microphone inputs data using voices.
  • the more effective and convenient way to input data is that a user touches a monitor screen connected to the computer to input data. For example, when the computer processes a graphic, it is much easier for a user to draw the graphic personally using a pen than using the keyboard or the mouse. Thus, it is inconvenient for people to process graphics using a computer.
  • a touch panel and a touch pen are used to directly process a graphic on the screen of the touch panel, graphic processing can be performed very easily and delicately because as if a picture is directly drawn on paper.
  • portable devices provided with a touch panel are replacing peripheral devices such as a keyboard and a mouse.
  • a personal digital assistant includes a touch panel instead of a keyboard through which data is input by a user's hand such that data or a command is input using a touch pen to operate the screen of the touch panel.
  • It is another object of the present invention is to provide a wiring structure of a capacitive type touch panel for securing linearity, in which a SiO coating solution is uniformly over-coated on first, second and third correction patterns formed of silver paste and a transparent conductive layer to protect a conductive coating layer of the touch panel and secure durability.
  • It is yet another object of the present invention is to provide a wiring structure of a capacitive type touch panel for securing linearity, which is able to correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel.
  • a wiring structure of a capacitive type touch panel for securing linearity including: a glass substrate for forming a transparent conductive layer, printed first and second correction pattern and an etched third correction pattern, which are formed using silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer formed of ITO on the back of the glass substrate to shield noise; a shield pattern formed of silver paste on the back of the transparent conductive layer to attenuate noise; first, second and third correction patterns formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film formed in such a manner that a SiO coating solution is spin-coated on the first, second and third correction patterns and
  • the etched third correction pattern is formed in addition to the first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to thereby secure reliability, and a SiO coating solution is uniformly over-coated on the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer through spin coating to thereby protect a conductive coating layer of the touch panel. Accordingly, the present invention can secure durability and correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel.
  • FIG. 1 illustrates the structure of a capacitive type touch panel for securing linearity according to an embodiment of the present invention
  • FIGs. 2, 3 and 4 illustrate the wiring structures of the capacitive type touch panel for securing linearity, which includes printed first and second patterns and an etched third pattern according to an embodiment of the present invention
  • FIG. 5 is a view for explaining the operation principle of the capacitive type touch panel for securing linearity according to an embodiment of the present invention.
  • FIG. 6 is a flow chart of a process of manufacturing the capacity type touch panel for securing linearity according to an embodiment of the present invention.
  • a wiring structure of a capacitive type touch panel for securing linearity comprising: a glass substrate on which a transparent conductive layer, printed first and second correction pattern and an etched third correction pattern, which are formed using silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer formed of ITO on the back of the glass substrate to shield noise; a shield pattern formed of silver paste on the back of the transparent conductive layer to attenuate noise; first, second and third correction patterns formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film formed in such a manner that a SiO coating solution is spin-coated on the first, second
  • the first correction pattern has 10 to 30% of the surface resistance of the touch panel
  • the second correction pattern has 10 to 30% of the resistance of the first correction pattern
  • the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern.
  • the overcoat film is formed of an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized to maintain a stable resistance value.
  • linearity obtained upon the application of the first correction pattern is less than 10%
  • linearity obtained upon the application of the second correction pattern is less than 3%
  • linearity obtained upon the application of the third correction pattern is less than 1.5%.
  • FIG. 1 illustrates the structure of a capacitive type touch panel for securing linearity according to an embodiment of the present invention
  • FIGs. 2, 3 and 4 illustrate the wiring structure of the capacitive type touch panel for securing linearity, which includes printed first and second patterns and an etched third pattern according to an embodiment of the present invention
  • FIG. 5 is a view for explaining the operation principle of the capacitive type touch panel for securing linearity according to an embodiment of the present invention.
  • the capacitive type touch panel 90 for securing linearity includes: a glass substrate 10 on which a transparent conductive layer, printed first and second correction pattern formed of silver paste and an etched third correction pattern, which are formed in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer 40 formed of ITO (Indium Tin Oxide) or ATO (Antimon Tin Oxide) on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer 20 formed of ITO on the back of the glass substrate to shield noise; a shield pattern 30 formed of silver paste on the back of the transparent conductive layer to attenuate noise; first and second correction patterns 50 and 51 and a third correction pattern 52 formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film 60 uniformly spin-coated using a SiO
  • the transparent conductive layer, the printed first and second correction patterns and the etched third correction pattern, which are formed of silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, the shield pattern and the overcoat film are formed on the glass substrate 10.
  • the glass substrate 10 is a soda lime glass.
  • the transparent conductive layer 40 is formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel, and the transparent conductive layer 20 is formed of ITO on the back of the glass substrate to shield noise.
  • an ITO or ATO layer is formed on the front face of the glass substrate and an ITO layer is formed on the back of the glass substrate.
  • the shield pattern 30 is formed of silver paste on the back of the transparent conductive layer 20 to attenuate noise.
  • the first correction pattern has 10 to 30% of the surface resistance of the touch panel
  • the second correction pattern has 10 to 30% of the resistance of the first correction pattern
  • the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern. Linearity obtained upon the application of the first correction pattern is less than 10%, linearity obtained upon the application of the second correction pattern is less than 3%, and linearity obtained upon the application of the third correction pattern is less than 1.5%.
  • the overcoat film 60 is formed in a manner that a SiO coating solution is uniformly spin-coated on the first, second and third correction patterns and the transparent conductive layer to protect the conductive coating layer of the touch panel and attenuate noise. Furthermore, the overcoat film may be formed of an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized and maintain a stable resistance value.
  • the cable 70 is flexible and flat and is connected to an electrode for supplying power to the first, second and third correction patterns t in such a manner that a terminal of a tail is bonded to the electrode through soldering.
  • the touch panel 90 includes the glass substrate 10, the transparent conductive layers 20 and 40 attached onto the glass substrate 10, electrodes 80 formed at the corners of the transparent conductive layers 20 and 40, and the first, second and third correction patterns 50, 51 and 52 connected to the electrodes 80 and formed on the edge of the transparent conductive layers 20 and 40.
  • One end of the first, second and third correction patterns is connected to a touch panel controller 100.
  • FIG. 6 is a flow chart of process of manufacturing the capacitive type touch panel for securing linearity according to an embodiment of the present invention.
  • the transparent conductive layers are etched in order to correct linearity of a distorted signal structurally generated in the touch panel.
  • ITO or ATO is deposited on the front face of the glass substrate and ITO is deposited on the back of the glass substrate using sputtering.
  • the shield pattern for attenuating noise is formed of silver paste on the back face of the transparent conductive layer.
  • the first, second and third correction patterns 50, 51 and 52 are formed of silver paste on the front face of the transparent conductive layer in order to correct linearity of a distorted signal structurally generated in the touch panel.
  • the first, second and third correction patterns uniformly distribute a voltage generated in the touch panel to secure linearity.
  • the first, second and third correction patterns are formed of silver paste through silk screen and a dry etching method using a laser.
  • the first correction pattern has 10 to 30% of the surface resistance of the touch panel
  • the second correction pattern has 10 to 30% of the resistance of the first correction pattern
  • the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern.
  • Linearity obtained upon the application of the first correction pattern is less than 10%
  • linearity obtained upon the application of the second correction pattern is less than 3%
  • linearity obtained upon the application of the third correction pattern is less than 1.5%.
  • linearity is as poor as less than 20%.
  • the linearity patterns formed of silver paste are dried to remove a solvent component left in the linearity patterns.
  • a SiO coating solution is uniformly coated on the linearity patterns and the transparent conductive layer through spin coating to form the overcoat film in order to protect the conductive coating layer of the touch panel and attenuate noise after the dry process.
  • the overcoat film can be formed by coating an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized and maintain a stable resistance value.
  • the overcoat film is hardened to mechanically bond the patterns to the substrate.
  • the baking process is carried out at a temperature of 400 through 600 0 C for 10 to 30 minutes.
  • the cell cutting process S7 the glass substrate is cut into cells with a predetermined size to meet an environment where the touch panel is used after the baking process.
  • the bonding process S8 the terminal of the flexible flat cable is bonded to the electrodes through soldering in order to supply power.
  • the cable has five terminals. Among the five terminals, four terminals are connected to the electrodes and one terminal is for shielding.
  • the touch panel is tested.
  • the test includes a pen sliding test and a pitting test, which repeatedly watch that a user touches the touch panel for a long time through a pen and pitting. That is, it tests whether a value obtained by converting current flowing when the user touches the touch panel into coordinate values is correct.
  • the present invention can form the etched third correction pattern in addition to the first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to thereby secure reliability, and uniformly over-coat a SiO coating solution on the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer through spin coating to thereby protect a conductive coating layer of the touch panel. Accordingly, the present invention can secure durability and correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel. [47]

Abstract

The present invention relates to a wiring structure of a capacitive type touch panel for securing linearity, in which an etched third correction pattern is formed in addition to first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel and secure reliability and a SiO coating solution is uniformly over-coated through spin coating on the printed first and second correction patterns and the etched third correction pattern to protect a conductive coating layer of the touch panel, thereby securing durability and correctly detecting a touch point irrespective of the degree of conductivity of an object touching the touch panel.

Description

Description
LINE STRUCTURE OF CAPACITIVE TYPE TOUCH PANEL
FOR SECURING LINEARITY
Technical Field
[1] The present invention relates to a wiring structure of a capacitive type touch panel for securing linearity, and more particularly to a wiring structure of a capacitive type touch panel, in which an etched third correction pattern is formed in addition to first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to secure reliability, and a SiO coating solution is uniformly over-coated through spin coating on the surfaces of the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer to protect a conductive coating layer of the touch panel, thereby securing durability and correctly detecting a touch point irrespective of the degree of conductivity of an object touching the touch panel.
[2]
Background Art
[3] Peripheral devices of the computer have been developed along with the development of a computer using digital technology. The computer peripheral devices include a monitor, a keyboard, a mouse, a microphone, a speaker and so on. The keyboard and the microphone are used to input external data to the computer. The keyboard inputs data in a manner that keys are pushed and the microphone inputs data using voices. However, the more effective and convenient way to input data is that a user touches a monitor screen connected to the computer to input data. For example, when the computer processes a graphic, it is much easier for a user to draw the graphic personally using a pen than using the keyboard or the mouse. Thus, it is inconvenient for people to process graphics using a computer.
[4] However, when a touch panel and a touch pen are used to directly process a graphic on the screen of the touch panel, graphic processing can be performed very easily and delicately because as if a picture is directly drawn on paper. Accordingly, portable devices provided with a touch panel are replacing peripheral devices such as a keyboard and a mouse. For example, a personal digital assistant (PDA) includes a touch panel instead of a keyboard through which data is input by a user's hand such that data or a command is input using a touch pen to operate the screen of the touch panel.
[5] In a conventional touch panel, however, a uniform current is applied to the touch panel all the time. Thus, a large quantity of current unnecessarily flows to increase current consumption when a person with high conductivity touches the screen of the touch panel and a touch point cannot be correctly detected when a person with low conductivity touches the touch panel.
[6]
Disclosure of Invention Technical Problem
[7] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the conventional art, and it is a primary object of the present invention is to provide a wiring structure of a capacitive type touch panel for securing linearity, in which an etched third correction pattern is formed in addition to first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated.
[8] It is another object of the present invention is to provide a wiring structure of a capacitive type touch panel for securing linearity, in which a SiO coating solution is uniformly over-coated on first, second and third correction patterns formed of silver paste and a transparent conductive layer to protect a conductive coating layer of the touch panel and secure durability.
[9] It is yet another object of the present invention is to provide a wiring structure of a capacitive type touch panel for securing linearity, which is able to correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel.
[10]
Technical Solution
[11] To accomplish the above objects, according to the present invention, there is provided a wiring structure of a capacitive type touch panel for securing linearity, including: a glass substrate for forming a transparent conductive layer, printed first and second correction pattern and an etched third correction pattern, which are formed using silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer formed of ITO on the back of the glass substrate to shield noise; a shield pattern formed of silver paste on the back of the transparent conductive layer to attenuate noise; first, second and third correction patterns formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film formed in such a manner that a SiO coating solution is spin-coated on the first, second and third correction patterns and the transparent conductive layer, to protect a conductive coating layer of the touch panel and attenuate noise; and a flexible flat cable connected to an electrode for supplying power to the first, second and third correction patterns. [12]
Advantageous Effects
[13] According to the present invention, the etched third correction pattern is formed in addition to the first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to thereby secure reliability, and a SiO coating solution is uniformly over-coated on the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer through spin coating to thereby protect a conductive coating layer of the touch panel. Accordingly, the present invention can secure durability and correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel.
[14]
Brief Description of the Drawings
[15] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[16] FIG. 1 illustrates the structure of a capacitive type touch panel for securing linearity according to an embodiment of the present invention;
[17] FIGs. 2, 3 and 4 illustrate the wiring structures of the capacitive type touch panel for securing linearity, which includes printed first and second patterns and an etched third pattern according to an embodiment of the present invention;
[18] FIG. 5 is a view for explaining the operation principle of the capacitive type touch panel for securing linearity according to an embodiment of the present invention; and
[19] FIG. 6 is a flow chart of a process of manufacturing the capacity type touch panel for securing linearity according to an embodiment of the present invention.
[20]
Mode for the Invention
[21] In order to accomplish the above objects, according to the features of the present invention, there is provided a wiring structure of a capacitive type touch panel for securing linearity, comprising: a glass substrate on which a transparent conductive layer, printed first and second correction pattern and an etched third correction pattern, which are formed using silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer formed of ITO on the back of the glass substrate to shield noise; a shield pattern formed of silver paste on the back of the transparent conductive layer to attenuate noise; first, second and third correction patterns formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film formed in such a manner that a SiO coating solution is spin-coated on the first, second and third correction patterns and the transparent conductive layer, to protect a conductive coating layer of the touch panel and attenuate noise; and a flexible flat cable connected to an electrode for supplying power to the first, second and third correction patterns.
[22] In the present invention, the first correction pattern has 10 to 30% of the surface resistance of the touch panel, the second correction pattern has 10 to 30% of the resistance of the first correction pattern, and the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern.
[23] In the present invention, the overcoat film is formed of an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized to maintain a stable resistance value.
[24] In the present invention, linearity obtained upon the application of the first correction pattern is less than 10%, linearity obtained upon the application of the second correction pattern is less than 3%, and linearity obtained upon the application of the third correction pattern is less than 1.5%.
[25] Hereinafter, a preferred embodiment of the invention will be explained in detail with reference to the appended drawings.
[26] FIG. 1 illustrates the structure of a capacitive type touch panel for securing linearity according to an embodiment of the present invention, FIGs. 2, 3 and 4 illustrate the wiring structure of the capacitive type touch panel for securing linearity, which includes printed first and second patterns and an etched third pattern according to an embodiment of the present invention, and FIG. 5 is a view for explaining the operation principle of the capacitive type touch panel for securing linearity according to an embodiment of the present invention.
[27] Referring to FIGs. 1, 2, 3 and 4, the capacitive type touch panel 90 for securing linearity includes: a glass substrate 10 on which a transparent conductive layer, printed first and second correction pattern formed of silver paste and an etched third correction pattern, which are formed in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer 40 formed of ITO (Indium Tin Oxide) or ATO (Antimon Tin Oxide) on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer 20 formed of ITO on the back of the glass substrate to shield noise; a shield pattern 30 formed of silver paste on the back of the transparent conductive layer to attenuate noise; first and second correction patterns 50 and 51 and a third correction pattern 52 formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film 60 uniformly spin-coated using a SiO coating solution on the surface of the first, second and third correction patterns and the transparent conductive layer to protect a conductive coating layer of the touch panel and attenuate noise; and a flexible flat cable 70 connected to an electrode for supplying power to the first, second and third correction patterns.
[28] The functions of the technical means constructing the capacitive type touch panel
90 for securing linearity will be explained.
[29] The transparent conductive layer, the printed first and second correction patterns and the etched third correction pattern, which are formed of silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, the shield pattern and the overcoat film are formed on the glass substrate 10. The glass substrate 10 is a soda lime glass.
[30] The transparent conductive layer 40 is formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel, and the transparent conductive layer 20 is formed of ITO on the back of the glass substrate to shield noise. Here, an ITO or ATO layer is formed on the front face of the glass substrate and an ITO layer is formed on the back of the glass substrate.
[31] The shield pattern 30 is formed of silver paste on the back of the transparent conductive layer 20 to attenuate noise.
[32] The first and second correction patterns 50 and 51 and the third correction pattern
52 are formed of silver paste on the front face of the transparent conductive layer 40 to correct linearity of a distorted signal structurally generated in the touch panel and uniformly distribute a voltage generated in the touch panel to secure linearity. The first correction pattern has 10 to 30% of the surface resistance of the touch panel, the second correction pattern has 10 to 30% of the resistance of the first correction pattern, and the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern. Linearity obtained upon the application of the first correction pattern is less than 10%, linearity obtained upon the application of the second correction pattern is less than 3%, and linearity obtained upon the application of the third correction pattern is less than 1.5%.
[33] The overcoat film 60 is formed in a manner that a SiO coating solution is uniformly spin-coated on the first, second and third correction patterns and the transparent conductive layer to protect the conductive coating layer of the touch panel and attenuate noise. Furthermore, the overcoat film may be formed of an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized and maintain a stable resistance value.
[34] The cable 70 is flexible and flat and is connected to an electrode for supplying power to the first, second and third correction patterns t in such a manner that a terminal of a tail is bonded to the electrode through soldering.
[35] Referring to FIG. 5, the touch panel 90 includes the glass substrate 10, the transparent conductive layers 20 and 40 attached onto the glass substrate 10, electrodes 80 formed at the corners of the transparent conductive layers 20 and 40, and the first, second and third correction patterns 50, 51 and 52 connected to the electrodes 80 and formed on the edge of the transparent conductive layers 20 and 40. One end of the first, second and third correction patterns is connected to a touch panel controller 100. When current is supplied to the electrodes 80 through the terminal 71 of the tail 70 via the first, second and third correction patterns 50, 51 and 52, current output from the electrodes 80 flows through the entire transparent conductive layers 20 and 40.
[36] FIG. 6 is a flow chart of process of manufacturing the capacitive type touch panel for securing linearity according to an embodiment of the present invention.
[37] Referring to FIG. 6, in the etching process Sl, the transparent conductive layers are etched in order to correct linearity of a distorted signal structurally generated in the touch panel. Here, ITO or ATO is deposited on the front face of the glass substrate and ITO is deposited on the back of the glass substrate using sputtering.
[38] In the shield pattern forming process S2, the shield pattern for attenuating noise is formed of silver paste on the back face of the transparent conductive layer.
[39] In the process S3, the first, second and third correction patterns 50, 51 and 52 are formed of silver paste on the front face of the transparent conductive layer in order to correct linearity of a distorted signal structurally generated in the touch panel. The first, second and third correction patterns uniformly distribute a voltage generated in the touch panel to secure linearity. Here, the first, second and third correction patterns are formed of silver paste through silk screen and a dry etching method using a laser. The first correction pattern has 10 to 30% of the surface resistance of the touch panel, the second correction pattern has 10 to 30% of the resistance of the first correction pattern, and the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern. Linearity obtained upon the application of the first correction pattern is less than 10%, linearity obtained upon the application of the second correction pattern is less than 3%, and linearity obtained upon the application of the third correction pattern is less than 1.5%. When the correction patterns are not applied, linearity is as poor as less than 20%.
[40] In the dry process S4, the linearity patterns formed of silver paste are dried to remove a solvent component left in the linearity patterns. In the overcoat film forming process S5, a SiO coating solution is uniformly coated on the linearity patterns and the transparent conductive layer through spin coating to form the overcoat film in order to protect the conductive coating layer of the touch panel and attenuate noise after the dry process. Furthermore, the overcoat film can be formed by coating an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized and maintain a stable resistance value.
[41] In the baking process S6, the overcoat film is hardened to mechanically bond the patterns to the substrate. The baking process is carried out at a temperature of 400 through 6000C for 10 to 30 minutes. In the cell cutting process S7, the glass substrate is cut into cells with a predetermined size to meet an environment where the touch panel is used after the baking process. In the bonding process S8, the terminal of the flexible flat cable is bonded to the electrodes through soldering in order to supply power. Here, the cable has five terminals. Among the five terminals, four terminals are connected to the electrodes and one terminal is for shielding.
[42] In the linearity test process S9 for measuring the accuracy of the touch panel, the touch panel is tested. The test includes a pen sliding test and a pitting test, which repeatedly watch that a user touches the touch panel for a long time through a pen and pitting. That is, it tests whether a value obtained by converting current flowing when the user touches the touch panel into coordinate values is correct.
[43] In the exterior inspection and packaging step SlO, the touch panel is assembled.
[44] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in forms and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
[45]
Industrial Applicability
[46] As described above, the present invention can form the etched third correction pattern in addition to the first and second correction patterns printed using silver paste in order to correct distorted linearity structurally generated in the capacitive touch panel to thereby secure reliability, and uniformly over-coat a SiO coating solution on the printed first and second correction patterns, the etched third correction pattern and a transparent conductive layer through spin coating to thereby protect a conductive coating layer of the touch panel. Accordingly, the present invention can secure durability and correctly detect a touch point irrespective of the degree of conductivity of an object touching the touch panel. [47]

Claims

Claims
[1] A wiring structure of a capacitive type touch panel for securing linearity, comprising: a glass substrate for forming a transparent conductive layer, printed first and second correction pattern and an etched third correction pattern, which are formed using silver paste in order to uniformly distribute a voltage generated in the touch panel to secure linearity, a shield pattern and an overcoat film; a transparent conductive layer formed of ITO or ATO on the front face of the glass substrate to correctly detect a touch point of an object touching the touch panel; a transparent conductive layer formed of ITO on the back of the glass substrate to shield noise; a shield pattern formed of silver paste on the back of the transparent conductive layer to attenuate noise; first, second and third correction patterns formed of silver paste on the front face of the transparent conductive layer to correct linearity of a distorted signal structurally generated in the touch panel; an overcoat film formed in such a manner that a SiO coating solution is spin- coated on the first, second and third correction patterns and the transparent conductive layer, to protect a conductive coating layer of the touch panel and attenuate noise; and a flexible flat cable connected to an electrode for supplying power to the first, second and third correction patterns.
[2] The wiring structure according to claim 1, wherein the first correction pattern has
10 to 30% of the surface resistance of the touch panel, the second correction pattern has 10 to 30% of the resistance of the first correction pattern, and the third correction pattern is formed in the shape of a dotted line having a distance of less than 10mm from the second correction pattern.
[3] The wiring structure according to claim 1, wherein the overcoat film is formed of an insulating SiO inorganic material to prevent the first, second and third correction patterns from being oxidized to thereby maintain a stable resistance value.
[4] The wiring structure according to claim 1, wherein linearity obtained upon the application of first correction pattern is less than 10%, linearity obtained upon the application of the second correction pattern is less than 3%, and linearity obtained upon the application of the third correction pattern is less than 1.5%.
PCT/KR2006/003814 2005-10-07 2006-09-26 Line structure of capacitive type touch panel for securing linearity WO2007043756A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009145485A3 (en) * 2008-04-04 2010-01-21 (주)멜파스 Contact sensing device with improved edge position recognition characteristics

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101480454B1 (en) * 2008-04-07 2015-01-09 엘지전자 주식회사 Portable terminal
KR101049891B1 (en) * 2008-11-11 2011-07-19 주식회사 티인티 Pad for manufacturing touch panel and assembly to which PCB is bonded
KR101140795B1 (en) * 2010-03-12 2012-05-03 박준영 Bonding tip for manufacturing touch panel and bonding method using the same
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KR101710552B1 (en) 2010-07-20 2017-02-28 삼성디스플레이 주식회사 Touch Screen Panel
KR101233656B1 (en) * 2012-02-15 2013-02-15 유흥상 Vacuum coating method of white coating layer for touch screen panel
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KR101514612B1 (en) * 2014-10-21 2015-04-23 유흥상 vacuum deposition jig for touch screen panel frame
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020019671A (en) * 2000-09-06 2002-03-13 김순택 Touch panel device including the dummy line for protecting the external noise
KR20030034588A (en) * 2001-10-26 2003-05-09 주식회사 에이터치 Structure of Electrode in Touch Screen
WO2004001573A2 (en) * 2002-06-14 2003-12-31 3M Innovative Properties Company Linearized conductive surface
WO2004010369A2 (en) * 2002-07-23 2004-01-29 3M Innovative Properties Company Thin face capacitive touch screen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6057903A (en) 1998-08-18 2000-05-02 International Business Machines Corporation Liquid crystal display device employing a guard plane between a layer for measuring touch position and common electrode layer
KR100369903B1 (en) * 2000-10-27 2003-01-29 토스일렉트로닉스 주식회사 Touch panel input device
KR100624258B1 (en) * 2001-03-23 2006-09-13 이터보터치 테크날러지 인코퍼레이티드 Blended material and method for manufacturing touch screen linearization pattern
US7477242B2 (en) 2002-05-20 2009-01-13 3M Innovative Properties Company Capacitive touch screen with conductive polymer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020019671A (en) * 2000-09-06 2002-03-13 김순택 Touch panel device including the dummy line for protecting the external noise
KR20030034588A (en) * 2001-10-26 2003-05-09 주식회사 에이터치 Structure of Electrode in Touch Screen
WO2004001573A2 (en) * 2002-06-14 2003-12-31 3M Innovative Properties Company Linearized conductive surface
WO2004010369A2 (en) * 2002-07-23 2004-01-29 3M Innovative Properties Company Thin face capacitive touch screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009145485A3 (en) * 2008-04-04 2010-01-21 (주)멜파스 Contact sensing device with improved edge position recognition characteristics

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