KR101026522B1 - Touch screen panel module increasing active area - Google Patents

Abstract

PURPOSE: An electronic structure of a touch screen panel module is provided to increase effective capture surface of a contact location by directly transferring a contact location sensing signal to a control chip through an electronic wire unit. CONSTITUTION: A transparent substrate comprises active and inactive region. The transparent electrode pattern part(110) is formed in an active area. The control chip electrode pad(140) is formed in an inactive region and mounts a control chip. An electrode pad(120) is formed in the inactive region and is connected to a transparent electrode pattern part formed in a border of the active region. An electrode wiring part(130) is formed along the edge of the inactive region and connecting the electrode pad and the control chip electrode pad.

Description

Electrode wiring structure of touch screen panel module that can increase active area {Touch screen panel module increasing active area}

The present invention relates to a touch screen panel module, and more particularly, an electrode pad and a control chip electrode pad are integrally formed on the touch screen panel, and the electrode pad and the control chip electrode pad are electrically connected to each other through a wiring pattern to directly touch the panel. The present invention relates to an electrode wiring structure of a touch screen panel that can extend the effective sensing area of a contact position and accurately determine the contact position.

Personal computers, portable transmission devices, and other personal information processing devices perform text and graphics processing using various input devices such as a keyboard, a mouse, and a digitizer. These input devices have been developed due to the necessity of being able to input anybody with a simpler and less misoperation as well as a keyboard and a mouse as an input device as an interface as the use of a PC is expanded, and also to input characters by hand while being portable. . Nowadays, attention is shifting to more sophisticated technologies such as high reliability, the provision of new functions, durability, and manufacturing techniques related to design and processing involving materials or materials, beyond meeting the needs associated with the general functions of these input devices.

In particular, a touch panel is known as an input device that is simple, has low misoperation, can be input by anyone while carrying it, and can input characters without any other input device. Known in detail. The touch screen panel includes resistive, capacitive, ultrasonic, optical (infrared) sensor, and electromagnetic induction methods, depending on the operation method. The difference, the difficulty of design and processing technology, etc. is characterized by different characteristics, so the advantages are distinguished and the method is selected. Selection criteria include optical, electrical, mechanical, environmental and input characteristics, and durability and economy.

1 is a view illustrating an example of an electronic device to which a conventional capacitive touch screen panel module is applied.

Referring to FIG. 1, the touch screen panel module is a portable electronic device such as a mobile communication terminal, a portable media player (PMP), a personal digital assistant (PDA), a navigation device, an MP3 player, a television, a computer, a DVD player, a refrigerator, and the like. It can be widely applied to home appliances such as washing machines. The electronic device 1 includes a housing 11 forming the exterior of the electronic device 1, a display unit 12 having a touch screen panel module mounted on the front of the housing, and an input key 13 provided separately from the touch screen panel module. ). The input key 13 may include a key that is frequently used separately from the touch screen panel module, or may remove the input key 13 and process all inputs through the touch screen panel module.

The display unit 12 is a module for outputting an image related to the operation of the electronic device 1 to a user, and may be implemented as a liquid crystal display (LCD), an organic light emitting device (OLED), or the like. have. A touch screen panel module may be attached to an upper surface of the display unit 12 to receive an input through a user's body or a stylus pen.

Referring to FIG. 2 illustrating a cross-sectional exploded view of the display unit, the display unit 12 is a display unit 20 for outputting an image corresponding to an electronic device to a user, and a touch screen panel disposed on an upper surface of the display unit 20. The module 10 and the window 40 are disposed on the upper surface of the touch screen panel module 10. The upper surface of the display unit 20 and the lower surface of the touch screen panel 10 are bonded to each other by an adhesive layer (not shown), and the upper surface of the touch screen panel 10 and the lower surface of the window 40 are adhesive layers (not shown). They are adhered to each other by. The image displayed on the display unit 20 is output to the user through the touch screen panel module 10 and the window 40.

3 is a view for explaining the conventional capacitive touch screen panel module in more detail. The touch screen panel module detects a contact position through a user's body contact or a stylus pen contact and a control chip that determines a contact position of the touch screen panel based on a touch screen panel generating a contact position detection signal and a contact position detection signal. It consists of a flexible printed circuit board provided.

Referring to FIG. 3 (a), the active screen AR is located in the center of the touch screen panel 30, and the inactive area NAR is formed along the outer circumference of the active screen AR. ) Is located. Here, the active area AR refers to an area in which the touch position can be detected by using a user's body contact or a stylus pen, and the inactive area NAR refers to a contact position detected in the active area. It means the area necessary for transmitting the signal for the contact, that is, the contact position detection signal to the control chip.

An inactive area NAR is necessarily required to provide an electrode pad, a connection pad, and an electrode wiring part for transmitting the contact position detection signal generated in the active area AR to the control chip of the flexible printed circuit board. However, as the area of the inactive area NAR increases, the effective sensing area of the active area AR, that is, the contact position decreases. Therefore, the active area AR is maximized in the touch screen panel 30 and the inactive area NAR is increased. It is desirable to reduce at least.

Referring to FIG. 3 (b), the transparent substrate 31 of the touch screen panel 30 is divided into an active region AR and an inactive region NAR. In the active region AR 31, a transparent electrode pattern part 33 is formed in a predetermined pattern to detect a contact position. In the non-active area NAR of the transparent substrate 31, an electrode pad 35 and a flexible printed circuit board are formed to be electrically connected to the transparent electrode pattern part 33 formed at the boundary of the active area AR. An electrode wiring electrically connected to the first connection pad 39 and the electrode pad 35 and the first connection pad 39, which are electrically connected to the first switch 50, to transmit the contact position detection signal to the flexible printed circuit board 50. The part 37 is disposed along the edge of the inactive area NAR.

The flexible printed circuit board 50 may include the second connection pad 51 electrically connected to the first connection pad 39 and the touch screen panel 30 based on the touch position detection signal received from the touch screen panel 30. The control chip 55 and the second wiring pad 51 and the electrode wiring part 53 for electrically connecting the control chip 55 to determine the contact position generated in the control panel 55 are provided. The second connection pad 51 receives the contact position detection signal through the first connection pad 39, and transmits the received contact position detection signal to the control chip 53 through the electrode wiring 53.

When the body of the user or the stylus pen contacts the transparent substrate 31, a capacitance change occurs using the transparent electrode pattern portion 33 as a dielectric. The contact position detection signal indicating the capacitance change is transmitted through the electrode pad 35, the electrode wiring part 37, the first connection pad 39, and the second connection pad 51 electrically connected to the transparent electrode pattern part 33. The control chip 55 of the flexible printed circuit board 50 is transferred. The control chip 55 may determine the contact position or the number of contacts of the active area AR by using the capacitance change based on the transmitted contact position detection signal. The determination control signal of the control chip 55 is transmitted to the external printed circuit board on which the main chip IC is mounted through the connector 57.

In the case of the conventional capacitive touch screen panel module described above, an inactive area must be provided at the outer edge of the active area AR in order to transfer the contact position detected by the active area AR to the flexible printed circuit board. In addition, a first connection pad is provided at an upper portion of the touch screen panel to electrically connect the NAR of the touch screen panel with the flexible printed circuit board. As the area of the non-active area increases in the touch screen panel, the area of the active area decreases and the effective detection area of the contact location capable of detecting the contact location also decreases.

In addition, the conventional capacitive touch screen panel module manufactures the touch screen panel and the flexible printed circuit board separately, and because it requires an additional process for electrically connecting the touch screen panel and the flexible printed circuit board to each other, the touch screen There is a problem that the manufacturing cost of the panel module increases.

In addition, in the case of the conventional capacitive touch screen panel module, the first connection pad of the touch screen panel and the second connection pad of the flexible printed circuit board must be correctly connected, and the first connection pad and the second connection pad are not correctly connected. The error signal is transmitted to the control chip, so that the contact position cannot be accurately determined, and the defective rate of the manufactured touch screen panel module increases.

In addition, the conventional capacitive touch screen panel module is manufactured by electrically connecting the first connection pad of the touch screen panel and the second connection pad of the chain printed circuit board, and the contact position detection signal is transmitted from the first connection pad to the second connection pad. Noise is synthesized in the contact position detection signal during transmission.

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Therefore, an object of the present invention is to solve the problems of the conventional capacitive touch screen panel module, the present invention is to increase the active area of the touch screen panel to increase the effective detection area of the touch screen panel It is to provide an electrode wiring structure of.

Another object of the present invention is to provide an electrode wiring structure of a touch screen panel with low manufacturing cost through an electrode wiring portion directly connecting an electrode pad and a control chip electrode pad.

Another object of the present invention is to provide an electrode wiring structure of a touch screen panel capable of accurately determining a contact position by directly transmitting a contact position detection signal generated in an active area from an electrode pad to an control chip electrode pad through an electrode wiring part. It is.

In order to achieve the object of the present invention, the electrode wiring structure of the capacitive touch screen panel according to the present invention is a transparent substrate having an active region for receiving a user command and an inactive region formed around the active region, and a transparent substrate Electrically connected to a transparent electrode pattern portion formed in an active region of the substrate, a control chip electrode pad formed in an inactive region of the transparent substrate and mounted with a control chip, and a transparent electrode pattern portion formed on an active region boundary of the transparent substrate. An electrode pad formed in an inactive region of the transparent substrate and an electrode wiring portion formed along an edge of the inactive region of the transparent substrate so as to electrically connect the electrode pad and the control chip electrode pad.

Preferably, the electrode wiring part, the electrode pad, and the control chip electrode pad may be integrally formed on the transparent substrate by an etching process or integrally formed on the transparent substrate by a silk printing process.

The electrode pads are formed on both sides of the inactive region, and the electrode wiring portion, the electrode pad, and the control chip electrode pad are formed of silver or copper.

The electrode wiring structure of the capacitive touch screen panel module according to the present invention has various effects as compared with the conventional capacitive touch screen panel module.

First, the electrode wiring structure of the capacitive touch screen panel module according to the present invention transmits the touch position sensing signal generated in the active area to the control chip directly through the electrode wiring part, thereby increasing the active area of the touch screen panel, thereby improving the contact position. The effective detection area can be increased.

Second, the electrode wiring structure of the capacitive touch screen panel module according to the present invention does not require a process of electrically connecting the touch screen panel and the flexible printed circuit board, which are individually manufactured, so that the touch screen panel module can be manufactured at low cost. Can be.

Third, the electrode wiring structure of the capacitive touch screen panel module according to the present invention does not require a process of electrically connecting the first connection pad of the touch screen panel and the second connection pad of the flexible printed circuit board so that the first connection pad is not required. The failure rate due to the connection error between the second connection pad can be reduced.

Fourth, the electrode wiring structure of the capacitive touch screen panel module according to the present invention transmits the touch position sensing signal generated in the active area to the control chip electrode pad directly through the electrode wiring, thereby contacting the touch position in the process of transmitting the touch position sensing signal. It is possible to prevent the error signal or noise from being combined with the detection signal.

1 is a view illustrating an example of an electronic device to which a conventional capacitive touch screen panel module is applied.
2 is a cross-sectional exploded view of a display unit including a conventional capacitive touch screen panel.
3 is a view for explaining the conventional capacitive touch screen panel module in more detail.
4 illustrates a capacitive touch screen panel module according to an embodiment of the present invention.
5 illustrates an active area of a conventional capacitive touch screen panel and an active area of a touch screen panel according to an embodiment of the present invention.

Hereinafter, the electrode wiring structure of the capacitive touch screen panel module according to the present invention will be described in detail with reference to the accompanying drawings.

4 illustrates a capacitive touch screen panel module according to an embodiment of the present invention.

Looking at the capacitive touch screen panel module 100 according to an embodiment of the present invention in detail with reference to Figure 4, the active area is located in the center portion of the transparent substrate 105, the outer edge of the active area The inactive area is located. A transparent electrode pattern unit 110 for detecting a contact position is formed in an active region of the transparent substrate 105, and a control chip electrode pad 140 is formed on an upper end of an inactive region of the transparent substrate 105. The electrode wiring part 130 is formed from the electrode pad 120 to the control chip electrode pad 140 on the left and right sides of the inactive area of the transparent substrate 105 based on the Y axis, so that the electrode wiring part 130 is transparent. The contact position detection signal of the electrode pattern unit 110 is directly transmitted to the control chip electrode pad 140. Here, the control chip electrode pad 140 is mounted with a control chip for determining the contact position generated in the active area based on the contact position detection signal. The contact position signal determined by the control chip is output to the external printed circuit board through the output wiring unit 150 formed on the transparent substrate 105.

The transparent substrate 105, the transparent electrode pattern unit 110, the electrode pad 120, the electrode wiring unit 130, the control chip electrode pad 140, and the output wiring unit 150 will be described in more detail as follows. .

The transparent substrate 105 is a substrate supporting the touch screen panel 100, and may be formed of a material such as polyethylene terephthalate (PET), polycarbonate (PC), polyethersulfone (PES), polyimide (PI), or the like. The transparent substrate 105 may be formed of a material having excellent light transmittance due to the characteristics of the touch screen panel module 100 mounted on the upper surface of the display unit of the electronic device.

When the user's body or stylus pen contacts the active area, the transparent electrode pattern unit 110 causes a change in capacitance. The transparent electrode pattern unit 110 may be formed of indium-tin oxide (ITO), indium-zinc oxide (IZO), Or a transparent conductive material such as zinc oxide (ZnO). The transparent electrode pattern unit 110 may be formed by coating a transparent conductive material on the upper surface of the transparent substrate 105 and patterning the transparent conductive material into a predetermined shape. As shown in FIG. 4, in the transparent electrode pattern unit 110, N transparent electrode pattern combinations composed of a pair of triangles 111 and 113 arranged alternately with respect to the X axis are vertically aligned in the active region along the Y axis. It may be arranged in the direction. However, according to the field to which the present invention is applied, the transparent electrode pattern may be formed in a different shape, which belongs to the scope of the present invention.

The electrode pads 120 are formed in the inactive region of the transparent substrate 105 so as to be electrically connected to the transparent electrode patterns formed on the active region boundary of the transparent substrate 105, respectively. Preferably, the electrode pads 120 are formed at both sides of the inactive region with respect to the Y axis, and the electrode wiring unit 130 may control the electrode pads 120 and the control chip electrode pads 140 formed at both sides of the inactive region. It extends in the Y-axis direction in the inactive region so as to be electrically connected. That is, as shown in FIG. 4, in the N transparent electrode pattern combination consisting of a pair of triangles arranged alternately with each other, each of the N triangle transparent electrode patterns 111 is formed with an electrode pad 121 formed at the left side. The electrode pad 121 is electrically connected to the control chip electrode pad 140 through the electrode wiring part 131 formed in the left inactive region again. On the other hand, in the N transparent electrode pattern combination consisting of a pair of triangles arranged alternately, each of the N triangle transparent electrode pattern 113 is electrically connected to the electrode pad 123 formed on the right side, the electrode pad ( 123 is electrically connected to the control chip electrode pad 140 through the electrode wiring 133 formed in the right inactive region again. Here, the plurality of electrode wiring units 131 connecting the electrode pads 121 and the control chip electrode pads 140 are formed to be spaced apart from each other by a predetermined distance, and the electrode pads 123 and the control chip electrode pads are separated from each other. The plurality of electrode wiring portions 133 connecting the 140 are formed to be spaced apart from each other by a predetermined distance.

The electrode pad 120, the electrode wiring unit 130, the control chip electrode pad 140, and the output wiring unit 150 are integrally formed on one surface of the transparent substrate 105, and the electrode pad 120 and the electrode wiring unit ( 130, the control chip electrode pad 140 and the output wiring unit 150 are integrally formed on the transparent substrate 105 by a silk printing method or integrally formed on the transparent substrate 105 through an etching process. Here, the separation distance between the plurality of electrode wires constituting the electrode wire part 130 is 100 μm or less, and the electrode pad 120, the electrode wire part 130, the control chip electrode pad 140, and the output wire part 150 are separated from each other. Is formed of silver or copper integrally on the transparent substrate 105 through a silk printing method or an etching process. When forming the electrode wiring unit 130 through the etching process, the electrode wiring of the electrode wiring unit 130 may be accurately formed within a predetermined error range. Therefore, in the touch screen panel according to the present invention, the electrode wiring unit 130 is formed by using an etching process, such that a short circuit is formed between the electrode wiring units of the electrode wiring unit 130 formed even at a distance between the electrode wirings within 100 μm. It can be prevented from occurring.

As shown in FIG. 4, the electrode wiring structure of the capacitive touch screen panel module according to an exemplary embodiment of the present invention includes a first connection pad and a second connector for electrically connecting the touch screen panel and the flexible printed circuit board. No connection pad is required. Therefore, the effective sensing area for detecting the touch position on the touch screen panel increases. In addition, a first connection pad is not required because a separate first connection pad or a second connection pad is not required to directly transmit a contact position detection signal generated in an active area to a control chip or to transmit a control signal of a control chip to an external printed circuit board. It is possible to prevent a defect or noise that may occur in the process of connecting the second connection pad with.

5 illustrates an active area of a conventional capacitive touch screen panel and an active area of a touch screen panel according to an embodiment of the present invention.

Referring to FIG. 5 (a), a space for forming a connection pad for electrically connecting a touch screen panel and a flexible printed circuit board to a conventional capacitive touch screen panel is required at the top of the touch screen panel. On the other hand, referring to Figure 5 (b), since the touch screen panel according to an embodiment of the present invention is formed integrally with the touch screen panel and the flexible printed circuit board, there is no need for a space for forming a separate connection pad. Accordingly, the touch screen panel according to the present invention can secure an active area wider than the active area of the conventional capacitive touch screen panel by the area corresponding to d1 in the Y-axis direction.

10, 100: touch screen panel module
30: touch screen panel 50: flexible printed circuit board
105: transparent substrate 110: transparent electrode pattern portion
120: electrode pad 130: electrode wiring portion
140: control chip electrode pad 150: output wiring

Claims (4)

A transparent substrate having an active region and an inactive region;
A transparent electrode pattern portion formed in an active region of the transparent substrate;
A control chip electrode pad formed in an inactive region of the transparent substrate and having a control chip mounted thereon;
An electrode pad formed in an inactive region of the transparent substrate so as to be electrically connected to a transparent electrode pattern portion formed at an active region boundary of the transparent substrate;
An electrode wiring portion formed along an edge of an inactive region of the transparent substrate to directly electrically connect the electrode pad and the control chip electrode pad; And
Is electrically connected to the control chip electrode pad, and includes an output wiring portion for outputting the control signal of the control chip to the outside,
And the control chip electrode pad, the electrode pad, the electrode wiring portion, and the output wiring portion are integrally formed in an inactive region of one surface of the transparent substrate. The method of claim 1,
The control chip electrode pad, the electrode pad, the electrode wiring portion and the output wiring portion
A capacitive touch screen panel, characterized in that formed integrally on the inactive region of one surface of the transparent substrate by an etching process or a silk printing process. The method of claim 1, wherein the electrode pad is
Capacitive touch screen panel, characterized in that formed on both sides of the inactive region of the transparent substrate. The method of claim 3, wherein the control chip electrode pad, the electrode pad, the electrode wiring portion and the output wiring portion is formed of silver or copper,
The distance between the electrode wiring portion is a capacitive touch screen panel, characterized in that less than 100㎛.

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