KR20100031305A - Touch panel with dummy electrode for seal and manufacturing method thereof - Google Patents

Touch panel with dummy electrode for seal and manufacturing method thereof Download PDF

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Publication number
KR20100031305A
KR20100031305A KR1020080090328A KR20080090328A KR20100031305A KR 20100031305 A KR20100031305 A KR 20100031305A KR 1020080090328 A KR1020080090328 A KR 1020080090328A KR 20080090328 A KR20080090328 A KR 20080090328A KR 20100031305 A KR20100031305 A KR 20100031305A
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KR
South Korea
Prior art keywords
electrodes
transparent conductive
conductive film
substrate
dummy electrode
Prior art date
Application number
KR1020080090328A
Other languages
Korean (ko)
Inventor
김진수
이규린
한창균
Original Assignee
일진디스플레이(주)
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 일진디스플레이(주) filed Critical 일진디스플레이(주)
Priority to KR1020080090328A priority Critical patent/KR20100031305A/en
Publication of KR20100031305A publication Critical patent/KR20100031305A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • 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
    • 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

Abstract

The present invention relates to a touch panel and a method of manufacturing the same, which can operate more stably by preventing the air in the space between the upper substrate and the lower substrate from escaping to the outside during touch panel operation. The touch panel includes an upper substrate having a lower transparent conductive film patterned on a lower surface thereof and a plurality of upper electrodes formed thereon, a lower substrate having a lower transparent conductive film patterned thereon and a plurality of lower electrodes formed thereon, and an upper surface of the lower transparent conductive film. Dot spacers formed in the upper dummy electrode formed on the lower surface of the upper transparent conductive film so as to surround the outer side of the plurality of upper electrodes in the form of a closed shape, and close the outer side of the plurality of lower electrodes The lower dummy electrode, the upper electrode and the lower electrode, and the upper dummy electrode and the lower dummy electrode which are formed on the upper surface of the lower transparent conductive film so as to enclose the shape of the figure, are respectively bonded to the upper substrate and the lower dummy electrode. A double-sided adhesive tape attaching the substrates to each other, and a portion of the plurality of upper electrodes and the plurality of lower electrodes And a dispenser that electrically connects some of them.

Description

TOUCH PANEL WITH DUMMY ELECTRODE FOR SEAL AND MANUFACTURING METHOD THEREOF

The present invention relates to a touch panel and a method of manufacturing the same. More specifically, the present invention relates to a touch panel and a method of manufacturing the same, which can operate more stably by preventing the air in the space between the upper substrate and the lower substrate from escaping to the outside during touch panel operation.

Touch panels are widely used as input devices of various electronic devices.

The touch panel is mainly configured and used together with an image display device such as a flat panel display, and is generally operated by touching a specific point of the touch panel with a finger or a pen. Such a touch panel is typically a resistive type consisting of two resistive sheets arranged so as to be insulated by dot spacers and to be in contact with each other by being pressed. Various types of touch panels are known, such as capacitive type, ultrasonic type, optical (infrared) sensor type, and electromagnetic induction type.

Among the various touch panels, the resistive touch panel is widely used as an input device such as an electronic organizer, PDA, portable PC, etc. in combination with a liquid crystal display device, and is thinner, smaller, lighter, and consumes more power than other methods. It is known to have advantages. The resistive touch panel has a matrix method and an analog method according to a detection method, and the analog method uses a 4-wire resistive film method, a 5-wire resistive film method, and an 8-wire resistive film depending on the wiring of electrodes for detecting touch points. Method and the like.

BACKGROUND ART A resistive touch panel having an electrode for detecting a touched point is typically provided with a plurality of electrodes on the upper substrate and the lower substrate, and the electrodes are formed in an electrically separated state from each other. More specifically, the upper transparent conductive film is patterned on the lower surface of the upper substrate, and a plurality of upper electrodes are printed on the lower surface of the upper transparent conductive film, the lower transparent conductive film is patterned on the upper surface of the lower substrate, and the upper surface is on the upper surface of the lower transparent conductive film. The electrodes are printed, and the upper and lower substrates are attached to each other by attaching double-sided adhesive tapes respectively to the lower surface of the upper electrode and the upper surface of the lower electrode.

In this case, the upper electrode is formed substantially along the outer periphery of the upper substrate, and the lower electrode is formed substantially along the outer periphery of the lower substrate. The plurality of upper electrodes formed on the upper substrate are formed spaced apart from each other to be electrically separated from each other. Similarly, a plurality of lower electrodes formed on the lower substrate are also formed in a spaced state so as to be electrically separated from each other. Accordingly, even when the lower surface of the upper electrode and the upper surface of the lower electrode are bonded to each other by the double-sided adhesive tape, when the touch panel is pressed, air in the space between the upper substrate and the lower substrate is vacated between the plurality of upper electrodes and the plurality of upper electrodes. It may be discharged to the outside through the empty space between the lower electrodes.

If the air in the space between the upper substrate and the lower substrate is discharged to the outside during the operation of the touch panel has a problem that may cause a malfunction of the touch panel.

In order to solve this problem, a method of filling the space between the plurality of upper electrodes and the space between the plurality of lower electrodes with an electrically insulating material has been introduced.

However, the method of filling the space between the plurality of upper electrodes and the space between the plurality of lower electrodes with an electrically insulating material has to be performed in a separate process after forming the upper electrode and the lower electrode, which makes the manufacturing process of the touch panel complicated. There is. Furthermore, there is a problem that an electrically insulating material filling the space between the plurality of upper electrodes and the space between the plurality of lower electrodes may be separated during operation of the touch panel.

The present invention was created to solve the above problems, the problem to be solved by the present invention is to seal the space between the upper substrate and the lower substrate of the touch panel through a simple structure to prevent the air is discharged to the outside It is to provide a touch panel and a method of manufacturing the same.

The touch panel according to an embodiment of the present invention for achieving the above object is, an upper substrate on which a lower transparent conductive film is patterned and a plurality of upper electrodes are formed, the lower transparent conductive film is patterned on the upper surface A lower substrate having a plurality of lower electrodes formed thereon, a dot spacer formed on an upper surface of the lower transparent conductive film, and an upper portion formed on a lower surface of the upper transparent conductive film so as to surround the outer side of the plurality of upper electrodes in a closed shape. Dummy electrode, a lower dummy electrode formed on the upper surface of the lower transparent conductive film to surround the outer side of the plurality of lower electrodes in the form of a closed figure, the upper electrode and the lower electrode, and the upper dummy electrode And a double-sided adhesive tape attached to the lower dummy electrode to adhere the upper substrate and the lower substrate to each other, and And a dispenser (dispenser) for electrically connecting a portion of the part and the plurality of lower electrodes of the plurality of upper electrode group.

On the other hand, the touch panel manufacturing method according to an embodiment of the present invention, patterning the upper transparent conductive film on the lower surface of the upper substrate, forming a plurality of upper electrodes on the lower surface of the upper transparent conductive film, the lower surface on the upper surface of the lower substrate Patterning a transparent conductive film, forming a plurality of lower electrodes on an upper surface of the lower transparent conductive film, and forming an upper dummy electrode on a lower surface of the upper transparent conductive film to surround an outer side of the plurality of upper electrodes in a closed shape Forming a lower dummy electrode on an upper surface of the lower transparent conductive film to surround outer surfaces of the lower electrodes in a closed shape; and forming a dot spacer on an upper surface of the lower transparent conductive film on the lower substrate. And a double-sided adhesive tape on the upper electrode and the lower electrode, and the upper dummy electrode and the lower dummy. Attaching the upper substrate and the lower substrate to each other by adhering to electrodes, and forming a dispenser for electrically connecting some of the plurality of upper electrodes and some of the plurality of lower electrodes. .

The forming of the plurality of upper electrodes and the forming of the upper dummy electrode may be simultaneously performed by a printing method.

The forming of the plurality of lower electrodes and the forming of the lower dummy electrode may be simultaneously performed by a printing method.

According to the present invention, an upper dummy electrode and a lower dummy electrode are respectively provided to enclose a plurality of upper electrodes formed on the upper substrate and a plurality of lower electrodes formed on the lower substrate in the form of a closed shape, thereby providing a gap between the upper substrate and the lower substrate. The space of the seal is sealed to prevent air from leaking out of the space between the upper and lower substrates during touch panel operation.

In particular, since the dummy electrodes are formed together at the time of forming the electrodes of the upper and lower substrates, the space between the upper and lower substrates can be sealed by a simple process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part, such as a layer or film, is said to be "on" or "below" another part, this includes not only the other part "directly above" or "directly below" but also another part in the middle. . On the contrary, when a part is "directly above" or "directly below" another part, there is no other part in the middle.

First, referring to FIG. 1, a touch panel according to an exemplary embodiment of the present invention includes an upper substrate 101 and a lower substrate 201 bonded to each other.

The upper substrate 101 and the lower substrate 201 may be formed of an electrically insulating transparent material. For example, the upper substrate 101 and the lower substrate 201 may be formed of a transparent material such as a stretchable polyethylene terephthalate (PET) film or thin glass.

In addition, the upper substrate 101 and the lower substrate 201 are bonded to each other while the FPC 300, which is an electrode for applying an electrical signal, is sandwiched between the upper substrate 101 and the lower substrate 201.

Hereinafter, a touch panel and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

2 to 4, the upper transparent conductive film 103 is patterned on the lower surface of the upper substrate 101 and a plurality of upper electrodes 105 and 106 are formed. That is, the upper transparent conductive film 103 is formed on the lower surface of the upper substrate 101, and the plurality of upper electrodes 105 and 106 are formed on the lower surface of the upper transparent conductive film 103.

The upper transparent conductive layer 103 may be formed of a transparent material having electrical conductivity such as indium tin oxide (ITO). In this case, the upper transparent conductive film 103 is patterned according to the shape of the plurality of upper electrodes 105 and 106 to be formed thereunder. For example, the upper transparent conductive layer 103 may be patterned such that the plurality of upper electrodes 105 and 106 are electrically separated from each other.

2 to 4, a lower transparent conductive layer 203 is patterned on the upper surface of the lower substrate 201 and a plurality of lower electrodes 205, 206, 207, and 209 are formed. That is, the lower transparent conductive film 203 is formed on the upper surface of the lower substrate 201, and the plurality of lower electrodes 205, 206, 207, and 209 are formed on the upper surface of the lower transparent conductive film 203.

The lower transparent conductive layer 203 may be formed of a transparent material having electrical conductivity such as indium tin oxide (ITO). In this case, the lower transparent conductive film 203 is patterned according to the shape of the plurality of lower electrodes 205, 206, 207, and 209 to be formed thereon. For example, the lower transparent conductive layer 103 may be patterned such that the plurality of lower electrodes 205, 206, 207, and 209 are electrically separated from each other.

In this case, as shown in FIG. 2, the plurality of upper electrodes 105 and 106 may be arranged to substantially surround an active area of the touch panel, and the plurality of lower electrodes 205, 206, 207, 209 may be similarly arranged to surround the active area of the touch panel.

The plurality of upper electrodes 105 and 106 and the plurality of lower electrodes 205, 206, 207, and 209 may be formed of a metal material having good electrical conductivity, for example, by printing silver. .

A dot spacer 211 is formed on the upper surface of the lower transparent conductive film 203. The dot spacer 211 may be formed before the lower electrodes 205, 206, 207, and 209 are formed on the lower transparent conductive film 203. The dot spacer 211 performs a function of maintaining an appropriate gap between the upper transparent conductive film 103 and the lower transparent conductive film 203 and may be formed of a polymer material having appropriate elasticity. For example, the dot space 211 may be formed by screen printing.

Meanwhile, the touch panel according to the embodiment of the present invention includes an upper dummy electrode 110 surrounding the plurality of upper electrodes 105 and 105. That is, as shown in FIG. 2, the upper dummy electrode 110 is formed on the lower surface of the upper transparent conductive film 103 so as to surround the outside of the plurality of upper electrodes 105 and 106 in the form of a closed figure.

In addition, the touch panel according to the exemplary embodiment includes a lower dummy electrode 210 surrounding the plurality of lower electrodes 205, 206, 207, and 209. That is, as shown in FIG. 2, the lower dummy electrode 210 is disposed on the upper surface of the bottom transparent conductive film 203 so as to surround the outside of the plurality of lower electrodes 205, 206, 207, and 209 in the form of a closed shape. Is formed.

In this case, the upper dummy electrode 110 may be simultaneously performed by a printing method together with the plurality of upper electrodes 105 and 106. For example, the upper dummy electrode 110 may be formed by printing silver.

The upper substrate 101 and the lower substrate 201 are attached to each other by an electrically insulating double-sided adhesive tape 220. That is, as shown in the figure, the double-sided adhesive tape 220 is the upper electrode 105, 106 and the lower electrode 205, 206, 207, 209, the upper dummy electrode 110 and the lower dummy electrode 210. The upper substrate 101 and the lower substrate 201 are attached to each other by being adhered to each other. In this case, as shown in FIG. 2, the double-sided adhesive tape 220 may be formed to have a form in which a portion corresponding to the active area of the touch panel is empty and surrounds the outside thereof.

Accordingly, the upper substrate is completely surrounded by the adhesion of the upper dummy electrode 110, the double-sided adhesive tape 220, and the lower dummy electrode 210 in the space formed between the upper substrate 101 and the lower substrate 201. The space formed between the 101 and the lower substrate 201 is sealed. Therefore, when the touch panel is pressed, air in the space formed between the upper substrate 101 and the lower substrate 201 is prevented from being discharged to the outside, so that the touch panel can operate more stably.

Meanwhile, the touch panel according to the embodiment of the present invention dispensers 231 and 233 for electrically connecting at least some of the plurality of upper electrodes and at least some of the plurality of lower electrodes 205, 206, 207, and 209. ).

Hereinafter, with reference to the accompanying drawings, an example of the electrode structure will be described.

First, the lower electrodes 205, 206, 207, and 209 are provided in two pairs. Each terminal of the two pairs of lower electrodes 205, 206, 207, and 209 is electrically connected to each terminal of the FPC 300 applied to an external power source. Meanwhile, a through hole 225 may be formed in a portion of the region of the double-sided adhesive tape 220 corresponding to the region where the FPC 300 is located.

More specifically, the pair of electrodes indicated by reference numerals 207 and 209 among the plurality of lower electrodes 205, 206, 207, and 209 apply electricity in the X-axis direction to the active region of the lower transparent conductive film 230. It is provided to. For this purpose, the pair of electrodes indicated by reference numerals 207 and 209 includes a portion extending in the Y-axis direction. At this time, as shown in Figure 2, the lower transparent conductive film 203 is formed with cutting lines 204a, 204b extending in the X-axis direction and the lower transparent conductive film separated by the cutting lines 204a, 204b. Both parts of the 203 are electrically insulated, so that when power is applied to the pair of electrodes 207 and 209, current flows only in the X-axis direction of the active region of the lower transparent conductive film 203.

On the other hand, a pair of electrodes 105 and 106 are formed on the upper substrate 101. At this time, a portion of the plurality of lower electrodes 205, 206, 207, and 209 indicated by reference numerals 205 and 206 is a pair of electrodes 105 and 106 formed on the upper substrate 101 by the dispensers 231 and 233. Are electrically connected to each other. To this end, the dispensers 231 and 233 are formed of an electrically conductive material, and the lower end thereof contacts the electrodes indicated by the reference numerals 206 and 205 of the plurality of lower electrodes 205, 206, 207, and 209, respectively. Upper ends of the 231 and 233 contact the upper electrodes 106 and 105 of the upper substrate 101, respectively. To this end, as shown in the figure, windows 221 and 231 are formed in the double-sided adhesive tape 220, respectively, and through holes 245 and 255 are formed in the electrodes indicated by reference numerals 206 and 205, respectively. . The dispensers 231 and 233 are filled in the windows 221 and 223 of the double-sided adhesive tape 220 and the through holes 245 and 255 formed in the electrodes indicated by the reference numerals 206 and 205, respectively. The electrodes indicated by are electrically connected to the pair of upper electrodes 106 and 105, respectively.

Meanwhile, the dispensers 231 and 233 adhere the upper substrate 101 and the lower substrate 201 to the liquid conductive material, and the dispensers 231 and 233 use the windows 221 and 223 of the double-sided adhesive tape 220. And through the through holes 245 and 255 formed in the electrodes indicated by the reference numerals 206 and 205 and then cured to form the lower substrate for injecting a liquid conductive material as shown in FIG. 2. Through holes 241 and 251 may be formed at corresponding points of 201, and through holes 243 and 253 may be formed at corresponding points of the lower transparent conductive film 203, respectively. In the state in which the upper substrate 101 and the lower substrate 201 are bonded with the double-sided adhesive tape 220, the electrically conductive material in the liquid state is injected and cured through the through holes 241 and 251 of the lower substrate 201. The dispensers 231 and 233 may be formed.

Meanwhile, the upper electrodes 106 and 105 electrically connected to the electrodes indicated by reference numerals 206 and 205 of the plurality of lower electrodes 205, 206, 207, and 209 through the dispensers 231 and 233, respectively, may be formed of an upper transparent conductive material. It is formed so that electricity can be applied to the active region of the film 103 so that a current flows in the Y-axis direction. To this end, the upper electrodes 105, 106 include a portion extending in the X-axis direction. At this time, as shown in Figure 2, the upper transparent conductive film 201 is formed with cutting lines 104a, 104b extending in the Y-axis direction and the upper transparent conductive film separated by the cutting lines (104a, 104b) Since both sides of the 103 are electrically insulated, when power is applied to the pair of electrodes 105 and 106, current flows only in the Y-axis direction of the active region of the upper transparent conductive film 103.

For example, when a specific point of the active area of the touch panel is touched to electrically conduct the upper transparent conductive film 103 and the lower transparent conductive film 203 at the corresponding point, the X axis of the lower transparent conductive film 203 Y-axis coordinates of the touched point can be obtained by detecting an electric signal of current in the direction, and X-axis coordinates of the touched point can be detected by detecting an electric signal of current in the Y-axis direction of the upper transparent conductive film 103. You can get it. Since the method of calculating the coordinates of the touched point by the electrode structure is obvious to those skilled in the art, a detailed description thereof will be omitted.

Although the upper dummy electrode 110 and the lower dummy electrode 120 are formed as an example using the electrode structure of the 4-wire resistive touch panel as an example, the upper electrode and the lower electrode are respectively in the form of a closed shape. As long as the surrounding dummy electrode is provided, the present invention can be applied to any resistive touch panel such as a 5-wire resistive film method or an 8-wire resistive film method.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it is recognized that the present invention is easily changed and equivalent by those skilled in the art to which the present invention pertains. Includes all changes and modifications to the scope of the matter.

1 is a perspective view of a touch panel according to an exemplary embodiment of the present invention.

2 is an exploded perspective view of a touch panel according to an exemplary embodiment of the present invention.

3 is a cross-sectional view taken along the line III-III of FIG. 1.

4 is a cross-sectional view taken along the line IV-IV of FIG. 1.

Claims (4)

An upper substrate on which a lower transparent conductive film is patterned and a plurality of upper electrodes are formed, A lower substrate on which a lower transparent conductive film is patterned and a plurality of lower electrodes are formed, A dot spacer formed on an upper surface of the lower transparent conductive film, An upper dummy electrode formed on a lower surface of the upper transparent conductive film so as to surround outer sides of the plurality of upper electrodes in a closed shape; A lower dummy electrode formed on an upper surface of the lower transparent conductive film so as to surround outer sides of the plurality of lower electrodes in a closed shape; A double-sided adhesive tape adhered to the upper electrode and the lower electrode, and to the upper dummy electrode and the lower dummy electrode, respectively to attach the upper substrate and the lower substrate to each other, and And a dispenser electrically connecting a portion of the plurality of upper electrodes to a portion of the plurality of lower electrodes. Patterning the upper transparent conductive film on the lower surface of the upper substrate, Forming a plurality of upper electrodes on a lower surface of the upper transparent conductive film, Patterning a lower transparent conductive film on an upper surface of the lower substrate, Forming a plurality of lower electrodes on an upper surface of the lower transparent conductive film, Forming an upper dummy electrode on a lower surface of the upper transparent conductive film to surround outer sides of the plurality of upper electrodes in a closed shape; Forming a lower dummy electrode on an upper surface of the lower transparent conductive film to surround outer sides of the plurality of lower electrodes in a closed shape; Forming a dot spacer on an upper surface of the lower transparent conductive film of the lower substrate; Adhering a double-sided adhesive tape to the upper electrode and the lower electrode and to the upper dummy electrode and the lower dummy electrode, respectively, to attach the upper substrate and the lower substrate to each other, and And forming a dispenser for electrically connecting some of the plurality of upper electrodes and some of the plurality of lower electrodes. In claim 2, The forming of the plurality of upper electrodes and the forming of the upper dummy electrode are performed simultaneously by a printing method. The method of claim 2 or 3, The forming of the plurality of lower electrodes and the forming of the lower dummy electrode are simultaneously performed by a printing method.
KR1020080090328A 2008-09-12 2008-09-12 Touch panel with dummy electrode for seal and manufacturing method thereof KR20100031305A (en)

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KR1020080090328A KR20100031305A (en) 2008-09-12 2008-09-12 Touch panel with dummy electrode for seal and manufacturing method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140078458A (en) * 2012-12-17 2014-06-25 엘지이노텍 주식회사 Display device and method for the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140078458A (en) * 2012-12-17 2014-06-25 엘지이노텍 주식회사 Display device and method for the same

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