KR101935023B1 - Electrostatic Capacity Type Electronic Board - Google Patents

Abstract

According to an embodiment of the present invention, a capacitance type large-size electronic whiteboard includes: a touchscreen forming a touch sensing area for an object; and a control unit which senses touch inputs based on the capacitance when the object touches the touch sensing area of the touchscreen. The touchscreen includes a base substrate and an electrode unit which is arranged on the base substrate to form a sensing area. The electrode unit is formed with micro-wires. The micro-wires include multiple first micro-wires arranged on the base substrate in a first direction in parallel and second micro-wires arranged on the base substrate in a second direction in parallel. The first and second micro-wires are extended to side surfaces in a curved manner after passing through one surface of the base substrate, thereby being extended to the rear surface from the side surfaces in a curved manner.

Description

[0001] Electrostatic Capacity Type Electronic Board [0002]

The present invention relates to a capacitive large size electronic whiteboard, and more particularly, to a capacitive large electronic whiteboard having a touch screen for forming a touch sensing area of an object and a touch sensing area for touching the touch sensing area of the touch screen, And a control unit for sensing the size of the large size electronic whiteboard.

With the development of computers using digital technology, auxiliary devices of computers are being developed together. Personal computers, portable transmission devices, and other personal information processing devices use various input devices such as a keyboard and a mouse And performs text and graphics processing.

However, due to the rapid progress of the information-oriented society, the use of computers has been increasingly used. As a result, it is difficult to efficiently operate a product using only a keyboard and a mouse, which are currently used as an input device.

Therefore, there is a growing need for a device that is simple and less error-prone, and that allows anyone to easily input information.

Particularly, in mobile computing environment, input devices such as keyboard and mouse are not suitable and new information input method is required.

In order to achieve this object, a touch screen device has been developed as an input device capable of inputting information such as text and graphics.

The touch screen device includes a flat panel touch screen 100 device such as an electronic blackboard, an electronic notebook, a liquid crystal display device (LCD), a plasma display panel (PDP), an el (electroluminescence), and a CRT (Cathode Ray Tube) Is a tool installed on the display surface of the same image display device and used by the user to select desired information while viewing the image display device.

The touch screen device is divided into resistance film type, capacitive type, surface ultrasonic type, and infrared type depending on the method of detecting the contact portion. In recent years, capacitive type has excellent touch sensitivity, multi-touch support, Technology.

The electrostatic capacity type is a method of using charge / discharge characteristics of a capacitor (capacitor or capacitor) which is one of the passive elements.

The capacitive sensor used in the touch screen is a sensor that senses the capacitance generated by human touch.

When a capacitance object such as a human finger touches the sensor, the change in the electric field formed between the two electrodes is measured.

The capacitance type can be divided into surface type and projected type, but most of them use the projected type (PCAP, Projected Capacitive) at present.

ITO (Indium Tin Oxide), which is a transparent conductive material, is used for the PCAP method, and it is divided into a glass, a film and an intergated type according to the type of the substrate.

The PCAP method can be divided into a self-capacitive method and a mutual-capacitive method, and may be divided into ITO and metal depending on the electrode material.

The PCAP method is advantageous in that multi-touch implementation is easy.

In the PCAP method, various methods are used depending on the lamination structure of the electrodes, and most of them use GFF (film electrode method), G1F (hybrid cover integral method), GF2 (indium oxide electrode film method)

The GFF system is an external structure in which two film sensors are inserted between a cover glass and a touch screen 100 panel.

In the GFF method, the processing difficulty is relatively low because the Tx electrode (driving line) and the Rx electrode (sensing line) are separately formed on separate films. However, since two film sensors are required differently from other film methods, The process also increases to No. 3.

This film sensor generally forms ITO on a PET film. The film substrate is less expensive, thinner and lighter than glass substrates, but has lower optical characteristics (transmittance) than glass, There is a disadvantage that the substrate may be deformed.

If the optical characteristics (transmittance) are decreased, more power consumption is required for the same luminance, which is disadvantageous in electronic devices.

 The G1F method and the GF2 method are external structures in which one film sensor is inserted between a cover glass and a touch screen (100) panel.

In order to improve optical characteristics, power consumption, and cost, which are the most widely used GFF method, they are implemented with one film sensor instead of two film sensors.

In the G1F method, one ITO electrode is formed in a cover glass and the other ITO electrode is formed in a film.

However, the disadvantage of the G1F method is that there is a relatively large burden on the investment cost since both the glass sensor facility and the film sensor facility are required.

In addition, since electrodes are formed directly on the cover glass, it is difficult to realize a mold design and a bright bezel. The GF2 method forms an ITO electrode on both sides of the film.

 Compared with the G1F method, since the electrodes are not formed directly on the cover glass, it is possible to implement a mold release design and a bright bezel, and the investment cost is relatively low because it does not require a glass sensor facility.

However, the process of forming electrodes on both sides of the film is difficult and the yield is low, making it difficult to improve the cost.

Since conventional GFF, G1F, and GF2 methods have a multi-layered structure, there are problems such as yield reduction and cost increase through various processes, and gradually G2 (or One Glass Solution) method implemented directly in a cover glass Is increasing.

The PCAP method is classified into a self-capacitance type and a mutual capacitance type according to a sensing method.

The self-capacitance method uses a single electrode for each basic pixel for touch recognition and reads a change in capacitance of the electrode.

Since the self-capacitance of one electrode is measured, only one electrode layer is required.

Further, since only one electrode layer is used and its operation principle and structure are simple, the cost is low, the signal-to-noise ratio (SNR) is high, and the thickness of the side bezel can be reduced.

However, due to the nature of the method of finding intersection of length and height, it is not used because of the ghost phenomenon that occurs in multi-touch and the fatal disadvantage that electrode wiring is complicated.

Mutual-capacitance is a method of using the capacitance between two electrodes. One electrode is arranged on the horizontal axis and the other electrode is arranged on the vertical axis to form a lattice structure. Then, the capacitance formed at the intersection between the two axes It is a method to detect the capacitance change at a specific point by measuring sequentially.

The advantage of the mutual capacitance method is that many touch panel makers are adopting a simpler electrode wiring structure without causing a ghost phenomenon in multi-touch.

In the reciprocal capacitance method, a driving electrode and a sensing line cross each other perpendicularly to the touch panel.

The driver electrode is an electrode to which a voltage is applied, and the sensing electrode is an electrode that is located opposite to the driver electrode to which a voltage is applied, and is connected to the sensor circuit of the touch screen device.

When a voltage is applied to the driver electrode, an electric field is formed in the sensing electrode, and a capacitance is generated.

Some of the electric field around the sensing electrode is also formed in the direction of the cover glass which is the top layer of the touch screen device.

The magnetic field formed in the direction of the cover glass reduces the capacitance generated as the finger is absorbed by the finger when the user's finger is located in the cover glass.

Since the driver electrode and the sensing electrode are in the form of a matrix, they sense the touch position in accordance with the change of the capacitance value.

In the conventional capacitive touch screen apparatus, ITO (Indium Tin Oxide), which is a transparent conductive material, is used as a driver electrode and a sensing electrode.

However, indium (ITO) is one of the representative rare and depleted resources, and the supply amount thereof is greatly lowered, and relatively high price has been an obstacle to secure price competitiveness.

Carbon nanotubes, graphene, and silver nanowires are being studied as transparent materials that can replace ITO. Research is also underway on opaque, but conductive, and inexpensive metal mesh touchscreen devices .

In recent years, demand for large touch screens has also increased.

When ITO is used as an electrode for touch sensing on a large touch screen, the resistance between the pattern electrodes is increased due to the ITO having a large surface resistance, so that the touch sensitivity of the touch panel is deteriorated in manufacturing a large- there was.

In addition, there is a problem that manufacturing cost is increased due to the relatively high price of ITO.

Currently, the most commercially available technology to replace ITO in large touch screens is Metal Mesh, which uses metal lines.

The metal mesh method is a technique of printing an opaque metal (copper, silver, etc.) in a very thin lattice form.

The use of highly conductive metal has the advantage of a very low resistance, but has a drawback that the transmittance is relatively low.

Despite the drawbacks of low transmittance, it is used in large touch screens because of low production cost.

However, since there is a disadvantage that the transmittance is still low, efforts have been made to increase the transmittance of the entire touch screen by making the metal line finer (reducing the width).

However, if the metal line is miniaturized, the amount of current flowing through the line is reduced, and the sensing sensitivity may be lowered. In addition, since the metal mesh method is formed by depositing or printing a metal line on a substrate, it is difficult to manufacture equipment with complicated manufacturing steps and high cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a capacitive large electronic blackboard capable of simplifying a manufacturing process, reducing a defective rate, .

It is to be understood that the present invention is not limited to the above-described embodiments and that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the following claims .

According to an embodiment of the present invention, a capacitive large size electronic whiteboard includes a touch screen that forms a touch sensing area of an object; And a controller for sensing a touch based on capacitance when the object touches the touch sensing area of the touch screen, wherein the touch screen is disposed on the base substrate and the base substrate to form a sensing area And a plurality of first micro-wires arranged in parallel in a first direction on the base substrate, and a plurality of first micro-wires arranged in parallel in the second direction on the base substrate, Wherein the first micro-wire and the second micro-wire are bent to extend laterally beyond one side of the base substrate, and extend beyond the side to the backside.

According to the large capacity electronic whiteboard according to an embodiment of the present invention, the manufacturing process can be simplified, the defect rate can be reduced, and further, the production cost can be reduced in producing a large-sized touch screen.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a schematic perspective view of a capacitive type electronic whiteboard according to an embodiment of the present invention;
2 is a schematic configuration view of a capacitive type electronic whiteboard according to an embodiment of the present invention;
3 to 8 are a schematic perspective view and a cross-sectional view of a touch screen according to an embodiment of the present invention;
9 and 10 are schematic circuit diagrams of a control unit according to an embodiment of the present invention.
11 is a schematic enlarged plan view of a touch screen according to an embodiment of the present invention.
12 and 13 are schematic enlarged plan views of a touch screen according to another embodiment of the present invention;
14-17 are schematic plan and cross-sectional views of a touch screen according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

According to an embodiment of the present invention, a capacitive large size electronic whiteboard includes a touch screen that forms a touch sensing area of an object; And a controller for sensing a touch based on capacitance when the object touches the touch sensing area of the touch screen, wherein the touch screen is disposed on the base substrate and the base substrate to form a sensing area And a plurality of first micro-wires arranged in parallel in a first direction on the base substrate, and a plurality of first micro-wires arranged in parallel in the second direction on the base substrate, Wherein the first micro-wire and the second micro-wire are bent to extend laterally beyond one side of the base substrate, and extend beyond the side to the backside.

The first micro-wire and the second micro-wire may form a first intersection area intersecting on the one surface of the base substrate and a second intersection area intersecting on the back surface of the base substrate, Wherein the first micro-wire is in contact with the base substrate in the first intersection region and is spaced apart from the base substrate in the second intersection region, the second micro-wire is spaced apart from the base substrate in the first intersection region, And may be in contact with the base substrate in the second crossing region.

The touch screen further includes a cover portion covering at least a part of the one surface, the side surface, and the rear surface of the base substrate, wherein the first micro wire and the second micro wire are bent on the cover portion, And extend from the one side to the back side through the side.

The cover portion may include a first inclined portion formed on the one surface of the base substrate, a first round portion formed on the one surface and the side surface of the base substrate, and a second round portion formed on the side surface and the back surface of the base substrate. And a second inclined portion formed on the back surface of the base substrate.

Further, the cover portion may be made of an elastic material.

The controller may include an inductor for providing an inductive capacitance component for resonating with a corresponding electrostatic capacitance component generated when an object has a capacitive touch in a first micro wire and a second micro wire area to which a scanning signal is transmitted, Wherein the inductor includes a variable inductor capable of varying the inductive capacity, the resonant operation circuit further includes a variable switching circuit for varying a capacitance component of the inductor, The variable switching circuit can vary the capacitance component of the inductor in a predetermined control mode.

The control mode may include a first control mode for varying a capacitance component of the inductor according to a position at which the plurality of first micro-wires and the second micro-wires are installed on the base substrate, And a second control mode for varying the capacitance component of the inductor.

The touch screen includes a base substrate and an electrode portion disposed on the base substrate to form a sensing region, wherein the electrode portion is formed of a micro-wire, and the micro-wire is continuously formed in a rounded shape on the base substrate, .

The micro-wires may include a plurality of first micro-wires arranged in parallel in the first direction on the base substrate and a plurality of second micro-wires arranged in parallel in the second direction on the base substrate, The micro-wires and the second micro-wires may be bent to extend laterally beyond one side of the base substrate, and extend beyond the side surfaces to the backside.

The first micro-wire and the second micro-wire may form a first intersection area intersecting on the one surface of the base substrate and a second intersection area intersecting on the back surface of the base substrate, The first micro-wires on the one side of the base substrate and the first micro-wires on the backside of the base substrate may intersect in the first intersection region.

In addition, the second micro-wires on the one surface of the base substrate and the second micro-wires on the back surface of the base substrate may intersect in the first intersection region.

In addition, the first intersection region and the second intersection region may overlap each other in a height direction.

According to another aspect of the present invention, there is provided a capacitive large size electronic whiteboard including: a touch screen forming a touch sensitive area of an object; And a controller for sensing a touch based on capacitance when the object touches the touch sensing area of the touch screen, wherein the touch screen is disposed on the base substrate and the base substrate to form a sensing area Wherein the electrode unit includes a plurality of first electrode units arranged in parallel in the first direction on the base substrate and a plurality of second electrode units arranged in parallel in the second direction on the base substrate, The substrate may form a predetermined arrangement space, and the base substrate may include a bridge portion that implements electrical connection between the plurality of first electrode portions and is disposed on the arrangement space.

The base substrate may have a base portion and a buffer portion formed on the base portion, and the buffer portion may form the arrangement space.

The cushioning portion may form an end portion for preventing the bridge portion disposed in the arrangement space from swinging.

In addition, the base substrate may further include an insulating portion disposed in the arrangement space and configured to provide insulation between the first electrode portion and the second electrode portion.

According to another aspect of the present invention, there is provided a method of manufacturing a capacitive large format electronic whiteboard, including: forming a buffer on a base; Processing the buffer to form a predetermined arrangement space; Forming a bridge portion on the arrangement space; Forming an insulating portion on the arrangement space; And forming an electrode portion on the buffer portion.

The step of forming the predetermined space by processing the buffer part may form an end part for preventing the bridge part disposed on the arrangement space from swinging.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

FIG. 1 is a schematic perspective view of a capacitive type electronic whiteboard according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a capacitive type electronic whiteboard according to an embodiment of the present invention.

FIGS. 3 to 8 are a schematic perspective view and a cross-sectional view of a touch screen according to an embodiment of the present invention, and FIGS. 9 and 10 are schematic circuit diagrams of a control unit according to an embodiment of the present invention.

11 is a schematic enlarged plan view of a touch screen according to an embodiment of the present invention.

12 and 13 are schematic enlarged plan views of a touch screen according to another embodiment of the present invention.

14 to 16 are a schematic plan view and a cross-sectional view of a touch screen according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

1 is a view for explaining a mode of use of the copyboard according to an embodiment of the present invention.

Referring to Fig. 1, the copyboard 10 is hung on a wall.

A plurality of graphic objects are displayed on the screen displayed on the front surface of the copyboard 10. [

Graphic objects are all content that can be visually displayed on a touch screen, such as movies, pictures, photos, and application launch windows.

The user O touches the copyboard 10.

Specifically, the user O touches the touch screen on which the screen of the copyboard 10 is displayed.

The user O may hold the pen in his hand and touch the tip of the pen to the touch screen or touch the touch screen with the finger of the user O without the pen.

The user O draws a circle on the screen.

Specifically, the user O grasps a pen to highlight one of a plurality of graphic objects displayed on the screen, and draws a circle on the touch screen.

Here, when the pen is touched, the copyboard 10 executes a pen tool that draws a line along the touched path.

Specifically, the electronic copyboard 10 generates a circle graphic along the touched path on the touch screen and displays it on the screen.

As described above, the electronic whiteboard 10 can display various graphic objects on various screens and can perform a predetermined function corresponding to the touch of a finger or a pen.

FIG. 2 is a schematic diagram for explaining a configuration of the copyboard 10 according to an embodiment of the present invention.

2, the copyboard 10 may include a touch screen 100, a control unit, a memory unit 300, a communication unit 400, and an input unit 500.

The touch screen 100 displays a screen.

Specifically, the touch screen 100 can display a screen for setting and executing the functions of the copyboard 10.

For example, the touch screen 100 may display a screen including at least one of a desktop, an application icon, an application execution window, a toolbar menu, a setting menu, a campus for drawing a picture, and a graphic object.

The touch screen 100 may be implemented with various touch screen 100 panels.

For example, the touch screen 100 may include a liquid crystal display panel (LCD panel), a plasma touch panel (PDP), an organic light emitting diode (OLED), a VFD Such as a liquid crystal display, a liquid crystal display, a vacuum fluorescent display (LCD), a field emission display (FED), and an electro luminescence display (ELD).

The control unit controls each configuration of the copyboard 10. Specifically, the control unit can control each configuration for performing functions of the electronic whiteboard 10 such as contents reproduction, writing, drawing, editing, and setting.

The control unit executes different functions corresponding to the touch of the object depending on whether the touch is detected or not.

The memory unit 300 may be configured to store data necessary for the functions of the copyboard 10 to be implemented.

The memory unit 300 may store reference data to implement different functions corresponding to the presence or absence of the touch.

The input unit 500 may be configured to receive a predetermined input value from the user for controlling the electronic whiteboard 10 without the user touching the touch screen 100.

The input unit 500 may be disposed on the touch screen 100 or may have a separate configuration such as a remote control.

The communication unit 400 may be configured to receive predetermined data from an external device.

Hereinafter, a touch method that can be used for the electronic whiteboard 10 of the present invention will be described. The touch method can be classified into an interaction touch method and a non-interaction touch method.

In the description of the present specification, the interaction touch method refers to a touch in which an interaction exists between an object to be touched and the electronic whiteboard 10, and refers to a touch manner in which the electronic whiteboard 10 can recognize the identity of an object define.

On the contrary, the non-interaction touch method refers to the case where the electronic whiteboard 10 recognizes a touched object as an arbitrary object that is sensed by the touch but is not distinguished from the other.

<Non-interaction touch>

An example of a non-interaction touch method is a resistive touch method.

The touch screen 100 includes a base substrate, a lower layer substrate, an upper layer substrate, a spacer, and a cover glass.

When the object touches the cover glass, it has a principle of detecting the electrical signal generated by the contact of the transparent electrode (ITO) coated on the upper layer substrate and the lower layer substrate by the pressure to determine the coordinates.

Based on this basic principle, resistive touch panels are classified as 4/5/6/7/8 Wire Resistive Type touch panels according to the number of conductors that detect x and y coordinates.

The resistive touch method can acquire only a single touch coordinate.

That is, only a single touch is possible.

The resistive touch method can detect a touch with respect to all the input means.

Another example of the non-interaction touch method is a capacitive touch method.

The four corners of the surface-type capacitive touch panel receive a small AC voltage.

The surface to which the object is touched is coated with a conductive material.

When an object having capacitance is touched to the surface, a current flows to the touch point.

The control unit detects the voltage drop of the four corners, thereby making it possible to acquire the coordinates of the touch point.

The projection type capacitive touch panel has a structure in which a sensor grid including a Y-axis transparent electrode and an X-axis transparent electrode is stacked on a base substrate and covers the cover glass thereon.

When an object having capacitance is touched to the surface, the sensor grid senses a change in the capacitance of the electrode, thereby obtaining the coordinates of the touch point.

Projection-type capacitive touch panels can be classified into Self type and Mutual type.

The self-type senses the change in capacitance due to the change in charge charged in the sensing electrode before and after the touch.

The mutual type senses a change in the relative capacitance between the driving electrode and the sensing electrode before and after the touch.

In the capacitive touch method, the input means must be an object with a capacitance.

The surface-type capacitive touch can only be a single touch, and the projection-type capacitive touch can be multi-touch.

Another example of the non-interaction touch method is the pressure touch method.

The touch panel includes a touch film on which an object is touched and a sensor for sensing a stress on an edge of the touch film.

The pressure touch method enables to acquire the coordinates of the touch point by detecting the stress generated by the force pressing the touch film of the object mechanically differently from the sensors at the four edges, unlike the other touch methods using the electrical characteristics .

The pressure touch method can detect only a single touch.

And the pressure touch method can touch all input means.

Another example of the non-interaction touch method is the wave touch method.

The touch panel includes a glass substrate, a reflector array, an X-Transmit Transducer, an X-Receive Transducer, a Y-Transmit Transducer, and a Y-Receive Transducer .

The reflector arrays of the four corners are configured such that opposing reflectors are paired and have a direction that advances the sound waves from the transmit transducer to the receive transducer.

Specifically, the sound waves output from the transmitting transducer are reflected by the respective reflecting plates of the reflector array on one side, and the reflected sound waves are received by the receiving transducer against the reflector array on the opposite side across the surface of the glass substrate.

The sound wave has a predetermined speed and the time to reach the receiving converter differs depending on the distance traveled by the sound wave.

The sound waves traveling on the surface of the glass substrate are absorbed by the touched object. The SAW touch panel enables to acquire the touched coordinates by sensing the time when the sound waves do not reach.

The SAW touch method detects a single touch. And SAW touch method can detect touch of all input means.

However, when an object reflects a sound wave, the object can not be used as an input means.

Another example of the non-interaction touch method is the Bending Wave touch method.

Bending Wave The touch panel includes a glass substrate and four-sided piezoelectric sensors.

When an object is touched on a flat glass, the vibration generated by the touch is detected by the piezoelectric sensor at four corners. Piezoelectric sensors can be implemented with a piezoelectric transducer that converts minute vibrations into electrical signals.

The touch point can be determined by comparing the magnitude of the vibration sensed at each piezo sensor.

That is, this touch method is similar to the method of detecting the origin of a seismic wave.

Bending Wave touch also detects a single touch. And, Bending Wave touch method can detect touch of all input means.

However, the bending wave touch method has a limitation that it can not distinguish between 'Hold', which is a touch operation, and 'Release', which is a touch operation after touching a surface.

Another example of a non-interactive touch method is the optical imaging touch method.

Optical imaging touch panels include glass substrates, optical sensors, and reflectors.

The optical sensor may be implemented with an infrared camera.

The optical sensor is disposed at both corners of the glass substrate. The reflector includes an infrared LED. The reflector reflects the infrared light emitted from the infrared LED to cause even infrared light to be irradiated onto the glass substrate.

The optical sensor captures an image of a touched object on a glass substrate. The touch coordinates are obtained by triangulation based on different images taken from the two optical sensors at a predetermined distance.

Three or more optical sensors may be disposed around the glass substrate to improve accuracy.

The optical imaging touch method is multi-touch capable, but there are still technical limitations in detecting more than two touch points.

In the optical imaging touch method, all objects can be used as input means.

Another example of the non-interaction touch method is the infrared matrix touch method.

Infrared matrix touch panels include glass substrates, infrared LED arrays, and optical receivers.

The infrared LED array and the optical receiver are arranged at the corners of the glass substrate to face each other.

The light emitting elements of the infrared LED array irradiate the infrared rays, and the irradiated infrared rays are received by the light receiving sensors of the corresponding optical receivers.

When an object touches the glass substrate, the object blocks at least two infrared rays traveling in the horizontal and vertical directions.

The touch coordinates are obtained from the position of the light receiving sensor which does not receive infrared ray among the x-axis light receiver in the horizontal direction and the light receiving sensor which does not receive the infrared ray out of the vertical direction y-axis optical receiver.

Infrared Matrix touch method can be multi touch but it is considered to detect single touch because there is practical difficulty.

 In addition, the infrared matrix touch method can use all objects as input means.

<Interaction touch>

An example of an interaction touch is electromagnetic induction (EMI) touch.

The input means for the touch is a stylus pen.

The EMI method can be divided into an active mode and a passive mode based on a stylus pen.

In passive mode, the touch panel includes a glass substrate and a sensor grid including a plurality of leads.

An alternating current flows in a plurality of conductors, and a magnetic field is formed on the surface of the glass substrate by a current.

The stylus pen includes a resonance circuit therein. The resonant circuit emits electromagnetic waves induced by the magnetic field of the surface.

The sensor grid senses electromagnetic waves emitted from the stylus pen.

The sensor grid outputs a signal corresponding to the position where the electromagnetic wave is sensed, thereby obtaining the X, Y coordinates of the touch point.

In the active mode, the touch panel includes a glass substrate and a sensor grid.

The active touch panel does not form a magnetic field on the glass substrate surface.

Instead, the stylus pen contains a battery inside and emits electromagnetic waves using the power of the battery.

The sensor grid senses the emitted electromagnetic waves and outputs signals corresponding to the positions where the electromagnetic waves are sensed, thereby obtaining the X and Y coordinates of the touch points.

The stylus pen used in the two EMI touch methods can change the frequency of the electromagnetic wave to be emitted.

Different functions may be implemented depending on the variable frequency.

Another example of an interaction touch is the Bluetooth (BT) touch method.

The stylus pen includes a Bluetooth module for Bluetooth communication.

The Bluetooth module 1220 can comply with the communications standard of Bluetooth 4.0. Bluetooth Low Energy (BLE), announced in Bluetooth 4.0, is a lightweight / low-power wireless communication method that is significantly different from conventional Bluetooth.

In this case, the stylus pen plays a role of a peripheral device, and the electronic whiteboard 10 performs a scan to detect advertising packets broadcasted to the periphery, thereby playing a role of a central device for discovery of a peripheral device Can be performed.

As described above, the touch method that can be used for the electronic whiteboard 10 of the present invention may be selectively implemented, or at least two schemes may be implemented in combination.

For example, the touch screen may be implemented by one of the touch methods described above in one area of the touch screen, and may be implemented by one of the other touch methods in another area.

In addition, a plurality of touch methods may be implemented for one area of the touch screen, and any one of a plurality of touch methods may be selected according to a viewpoint or a function.

Hereinafter, a capacitive large size electronic whiteboard 10 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 13.

The capacitive large size electronic whiteboard 10 according to an embodiment of the present invention includes a touch screen 100 for forming a touch sensing area of an object O and a touch screen 100 for sensing the touch sensing area of the touch screen 100. [ And a controller 200 for sensing the touch based on the capacitance when the area is touched.

In one example, the object O may be a finger or pen of a person.

For example, the sensing area may refer to an area where the touch of the object O can be sensed, and may refer to an area where the electrode unit 120 will be described below.

The touch screen 100 may provide an area that the object O can touch, and may further display predetermined information.

For example, the controller 200 determines which area of the sensing area of the touch screen 100 is touched based on the capacitance that is changed as the object O touches the touch screen 100 / &Lt; / RTI &gt;

The touch screen 100 may include a base substrate 110 and an electrode unit 120 disposed on the base substrate 110 to form a sensing region.

Here, for example, the electrode unit 120 may be a micro-wire.

For example, the electrode unit 120 may be disposed on the base substrate 110 to form a sensing region (active region).

Here, the microwire may include a plurality of first micro-wires 121 arranged in parallel in the first direction on the base substrate 110, and a plurality of first micro-wires 121 arranged in parallel in the second direction on the base substrate 110. [ And a second micro-wire 122 may be provided.

For example, the first micro-wires 121 may be spaced apart from each other in the X-axis direction on the base substrate 110.

For example, a plurality of the second micro-wires 122 may be disposed on the base substrate 110 in the Y-axis direction.

For example, the first micro-wire 121 and the second micro-wire 122 may cross each other and be disposed on the base substrate 110 to form a sensing region.

The first micro-wire 121 and the second micro-wire 122 may be connected to the controller 200.

The first micro-wire 121 and the second micro-wire 122 extend from one side 111 of the base substrate 110 to a side 112 and extend beyond the side 112, (113).

For example, one side 111 of the base substrate 110 may be a plane, and a side surface 112 of the base substrate 110 may be a surface defining a thickness of the base substrate 110 And the rear surface 113 of the base substrate 110 may be the opposite surface of the one surface 111 of the base substrate 110.

The object O may be touched on a cover glass disposed on one side 111 of the base substrate 110. [

The first microwave wire 121 and the second microwave wire 122 are not disposed only on one side 111 of the base substrate 110 but at an edge of one side 111 of the base substrate 110 And extend to the side surface 112 of the base substrate 110. As shown in FIG.

The first micro wire 121 and the second micro wire 122 extend from the side surface 112 of the base substrate 110 and extend to the back surface 113 of the base substrate 110 .

As a result, the first micro-wire 121 and the second micro-wire 122 cover at least a part of one surface 111, side surface 112, and back surface 113 of the base substrate 110 And may be disposed on the base substrate 110.

The ends of the first micro-wires 121 and the second micro-wires 122 extending on the back surface 113 of the base substrate 110 may be connected to the controller 200.

As a result, a bezel that covers the edge of the base substrate 110 is not required, and a relatively large sensing area can be formed.

In addition, since the controller 200 can be disposed on the back surface 113 of the base substrate 110, the thickness of the touch screen 100 can be reduced.

In addition, the first micro-wire 121 and the second micro-wire 122 are disposed on one base substrate 110 in a superimposed manner to enable more precise touch sensing.

The first micro-wire 121 and the second micro-wire 122 may be bonded to the base substrate 110 using an adhesive (for example, a transparent adhesive liquid).

The bonding method has advantages in that the manufacturing process is simple and the process equipment is inexpensive as compared with the conventional vapor deposition or printing method.

The first micro-wire 121 and the second micro-wire 122 may have a matrix structure, and may detect a touch position coordinate of a user according to a capacitance method.

The first micro-wire 121 and the second micro-wire 122 may function as an electrode including a conductive metal such as copper, silver, and the like.

The first micro-wire 121 and the second micro-wire 122 may be composed of a center member of a metal component and an insulating member that surrounds the center member. However, the first micro-wire 121 and the second micro-wire 122 may be formed in various shapes.

The capacitive large size electronic whiteboard 10 according to an exemplary embodiment of the present invention can determine the presence or absence of touch by any one of self-capacitance and mutual capacitance.

In the self-capacitance method, a signal may be transmitted to either the first micro-wire 121 or the second micro-wire 122, and a change in capacitance may be checked to detect whether or not the micro-wire 121 is touched.

In the reciprocal capacitance method, the first micro-wire 121 or the second micro-wire 122 may function as a driver line and the remainder as a sensing line.

A voltage may be applied to the driver line, and capacitance may be generated when the sensing line is electrically connected to the driver line.

Here, the first micro-wire 121 and the second micro-wire 122 each have a self-capacitance with the ground, and the mutual capacitance between the first micro-wire 121 and the second micro- There is a capacitance.

At this time, since the capacitance between the object O and the first micro-wire 121 and the second micro-wire 122 is generated when the object O is touched by the object O, The self capacitance value of each of the two microwires 122 and the mutual capacitance value between the first microwire 121 and the second microwire 122 may vary.

The controller 200 can detect the presence or absence of a touch and the touch position by detecting a change in the self capacitance value or a change in the mutual capacitance value.

The capacitive large size electronic whiteboard 10 according to an embodiment of the present invention may form a sensing area using one continuous micro-wire and may be connected to the controller 200 continuously.

Therefore, there is no need for a separate FPCB, and there is no section where the adhesive is connected, so that the defect rate generated in the bonding process can be reduced and the process can be greatly reduced.

For example, the base substrate 110 may include a film or a glass substrate, and may be positioned between the window glass and the display panel to form a sensing region.

The first micro-wire 121 and the second micro-wire 122 may be directly bonded to a display panel or may be bonded to a window glass to form a sensing area.

Here, the first micro-wire 121 and the second micro-wire 122 may include a first intersection region intersecting the first side 111 of the base substrate 110 and a second intersection region intersecting the first sub- On the back surface 113 of the second substrate 110. [

That is, the first micro-wire 121 and the second micro-wire 122 intersect with each other on the first surface 111 of the base substrate 110 and the back surface 113 of the base substrate 110, The second intersection region can be formed on the first intersection region on the one surface 111 of the base substrate 110 and on the back surface 113 of the base substrate 110 have.

Here, for example, the first micro-wire 121 may be in contact with the base substrate 110 in the first intersecting region, and the second micro-wires 122 may be in contact with the base substrate 110 in the second intersecting region. 0.0 &gt; 110 &lt; / RTI &gt;

As a result, the second micro-wires 122 can be spaced apart from the base substrate 110 by the first micro-wires 121 that are in contact with the base substrate 110 in the first intersection region, The first micro-wires 121 may be spaced apart from the base substrate 110 by the second micro-wires 122 in contact with the base substrate 110 in the second intersection region.

More specifically, as shown in FIG. 4 (a), a plurality of the first micro-wires 121 may be disposed on the first surface 111 of the base substrate 110 at first.

5 (a) and 5 (b), the second micro-wires 122 are electrically connected to the first micro-wires 121 and the second micro-wires 121 on the first surface 111 of the base substrate 110, And may be arranged in a plurality of spaced apart.

5 (a) and 5 (b), in the first intersection region on the one surface 111 of the base substrate 110, the first micro-wires 121 are connected to the base substrate And the second micro-wires 122 may be disposed apart from the first side 111 of the base substrate 110 by the first micro-wires 121 .

Of course, the second micro-wires 122 may be disposed in contact with the base substrate 110 on the first side 111 of the base substrate 110, rather than the first intersection region.

6 (a) and 6 (b), the second micro-wire 122, which is not the first micro-wire 121, is bent first and the back surface 113 of the base substrate 110 As shown in FIG.

7 (a) and (b), the first micro-wires 121 may be bent and disposed on the rear surface 113 of the base substrate 110, and the second micro- And may intersect the microwire 122 to form the second intersection region.

The second micro wire 122 is brought into contact with the back surface 113 of the base substrate 110 in the second intersection area on the back surface 113 of the base substrate 110, 121 may be spaced apart from the back surface 113 of the base substrate 110 by the second micro-wires 122.

Since the first micro-wire 121 and the second micro-wire 122 are covered with each other and are disposed on the base substrate 110, even if the first micro-wire 121 and the second micro- And the second micro-wires 122 can be prevented from being separated from the base substrate 110.

3, the touch screen 100 covers at least a portion of the first surface 111, the second surface 112, and the back surface 113 of the base substrate 110. In other words, And may further include a cover portion 130. FIG.

For example, the cover 130 may be spaced apart from the side surface 112 of the base substrate 110.

For example, the cover 130 may be a transparent elastic material.

The first micro-wire 121 and the second micro-wire 122 are bent on the cover 130 and extend from the first side 111 of the base substrate 110 to the side 112, And extend to the backside 113.

For example, the cover 130 includes a first inclined portion 131 formed on the first surface 111 of the base substrate 110, a first inclined portion 131 formed on the first surface 111 of the base substrate 110, A second round part 133 formed on the side surface 112 of the base substrate 110 and the back surface 113 and a second round part 133 formed on the back surface 113 of the base substrate 110, And a second inclined portion 134 formed on the back surface 113 of the first housing 110.

The first micro wire 121 and the second micro wire 122 are gently bent in the first round part 132 through the first inclined part 131 so as to protrude from the base substrate 110 The first round portion 132 and the second round portion 133. The first round portion 132 may extend from the one surface 111 of the base substrate 110 to the side surface 112, May extend from the first surface 112 to the rear surface 113 and may be bonded to the back surface 113 of the base substrate 110 through the second inclined portion 134.

As a result, the cover part 130 can prevent a disconnection that may occur as the first micro-wire 121 and the second micro-wire 122 are bent at the edge of the base substrate 110 .

In addition, the cover portion 130 may be formed to cover the first inclined portion 131, the first round portion 132, the second round portion 133, and the second inclined portion 134 The first microwave wire 121 and the second microwave wire 122 may be arranged in the groove of the cover part 130 by forming a groove (not shown) by a part of the outer surface.

For example, the first micro-wire 121 and the second micro-wire 122 may be adhered to the base substrate 110 with an adhesive, but not on the cover 130 by an adhesive It may be in a seated state.

As a result, even if a tolerance is generated in the bonding process of the first micro-wire 121 and the second micro-wire 122 on the base substrate 110 due to the elasticity of the cover 130, which is an elastic material, It is possible to prevent the occurrence of the tolerance due to the elastic deformation of the cover part 130 in the part 130.

Hereinafter, the control unit 200 of the capacitive large size electronic whiteboard 10 according to the embodiment of the present invention will be described in more detail with reference to FIGS. 9 to 11. FIG.

For example, the controller 200 controls the electrostatic capacitance of the object O in the area of the first micro-wire 121 and the second micro-wire 122 to which the scanning signal is transmitted, And a resonance operation circuit 220 having an inductor 221 for providing an inductive capacitance component for outputting a resonant scanning signal.

The inductor 221 may be a variable inductor having a variable inductance. The resonance operation circuit 220 may further include a variable switching circuit 222 for varying a capacitance component of the inductor 221 can do.

9, the scanning signal generated by the frequency generating source 230 is supplied to the first micro-wire 121 and the second micro-wire 122 selected by the scan switching circuit 210, .

At this time, when there is no touch of the object O to the first micro-wire 121 and the second micro-wire 122 from which a scanning signal is outputted, a signal not resonated is received by the receiving circuit 250, The controller 260 determines that there is no touch of the object O in the cross area.

On the other hand, if a capacitance touch of the object O is generated in the first micro wire 121 and the second micro wire 122, the first micro wire 121 and the second micro wire 121, Resonance occurs between the capacitance component C generated between the two microwires 122 and the inductor 221 of the resonance operation circuit 220.

The resonant scanning signal is received by the receiving circuit 250, and the determination unit 260 determines that there is a touch of the object O.

When there is no touch of the object O to the first micro-wire 121 and the second micro-wire 122 which are driven by outputting the scanning signal, if the voltage level of the scanning signal is touched with the voltage level of the scanning signal, The voltage levels of the transistors Q1,

The determination unit 260 determines whether or not the object O is touched by sequentially outputting a scanning signal to the scan switching circuit 210.

The resonance circuit 220, the scan switching circuit 210, and the reception circuit 250 are controlled by the determination unit 260.

Since the scanning signal resonated through the resonance circuit can be outputted, the sensing sensitivity can be increased by increasing the signal transmission efficiency even in the case of a fine micro-wire.

10, the resonance operation circuit 220 may be constituted by a variable inductor 221 capable of varying the inductive capacitance component.

The switching operation of the variable switching tap 222 of the variable inductor 221 can be controlled by the determination unit 260. [

The judging unit 260 switches the variable switching tabs 222 appropriately according to the positions of the plurality of first micro wires 121 and the second micro wires 122 to adjust the inductive capacity component of the variable inductor 221, Can be varied.

The first micro-wires 121 and the second micro-wires 122 are connected to the scan switching circuit 210 according to their installed positions, so that when a capacitive touch of the object O occurs The capacitance components (C) may be different from each other.

Therefore, the variable inductor 221 can be controlled so as to have an inductive capacitance component that can resonate appropriately in accordance with a change in the predicted capacitance component C.

Here, furthermore, the variable switching circuit 222 can vary the capacitance component of the inductor 221 in a predetermined control mode.

For example, the control mode may vary the capacitance component of the inductor 221 according to a position where the plurality of first micro-wires 121 and the second micro-wires 122 are installed on the base substrate 110 And a second control mode for varying a capacitance component of the inductor 221 according to a first control mode and an area touched by the object O. [

For example, when the object O is touched and the determination unit 260 determines that the object O is touched, the first micro-wire 121 and the second micro- The first control mode for varying the capacitance component of the inductor 221 according to the position where the micro wire 122 is installed on the base substrate 110 is implemented and further, And the second control mode in which the capacitance component of the inductor 221 is varied based on the area of the touched B region.

If the touched area is larger than the area A in the area B, the determination unit 260 switches the variable inductor 221 while appropriately switching the variable switching tab 222 according to the size of the touched area, Can be varied.

As a result, it is possible to detect the position and the size of the area that are touched more precisely.

Hereinafter, a modification of the electrode unit 120 will be described in detail with reference to FIGS. 12 and 13. FIG.

The overlapping of the technical features with the embodiment described above will not be described.

As shown in FIGS. 12 and 13, the microwires may be continuously arranged on the base substrate 110 in a rounded shape.

For example, the micro-wires may include a plurality of first micro-wires 121 arranged in parallel in the first direction on the base substrate 110, and a plurality of micro-wires 121 arranged in parallel in the second direction on the base substrate 110. [ The first micro-wire 121 and the second micro-wire 122 may be provided on the side surface 112 (see FIG. 1) of the base substrate 110, And the first micro-wire 121 and the second micro-wire 122 can be bent and extended to the back surface 113 via the side surface 112. Further, the first micro-wire 121 and the second micro- In a rounded shape on the one side 111 and the rear side 113 of the base body 110. [

The first micro-wire 121 and the second micro-wire 122 may have a first intersection region intersecting the first side 111 of the base substrate 110 and a second intersection region intersecting the first intersection region, 13, the first micro-wires 121 on the one surface 111 of the base substrate 110 and the second micro-wires 121 on the first surface 111 of the base substrate 110 can be alternately formed on the back surface 113. In addition, May intersect the first micro-wire (121) on the backside (113) of the base substrate (110) in the first intersection area.

Further, the second micro-wires 122 on the one surface 111 of the base substrate 110 and the second micro-wires 122 on the back surface 113 of the base substrate 110 are electrically connected to the first cross- And the first intersection region and the second intersection region may overlap each other in a height direction.

In other words, the first intersection region and the second intersection region are overlapped with each other in the height direction. Therefore, in the first intersection region and the second intersection region, the first surface 111 of the base substrate 110, Wherein the first micro wire 121 and the second micro wire 122 on the back surface 113 of the base substrate 110 are disposed on the first micro wire 121 and the second micro wire 121, 122 may be disposed.

Here, the first micro-wire 121 and the second micro-wire 122 on the one surface 111 of the base substrate 110 are formed in the peripheral region on the basis of the center points of the first intersection region and the second intersection region, ), That the first micro-wire 121 and the second micro-wire 122 on the back surface 113 of the base substrate 110 do not overlap each other in the height direction (resulting from a rounded shape) To increase the mutual capacitance.

Hereinafter, the electrode unit A120 according to another embodiment of the present invention will be described in detail with reference to FIGS. 14 to 17. FIG.

FIG. 14 is a plan view of a schematic portion of the electrode unit A120, FIG. 15 is a sectional view taken on line A-A 'of FIG. 14, and FIG. 16 is a sectional view taken on line B-B' of FIG.

17 is a schematic cross-sectional view for explaining the process of manufacturing the electrode unit A120.

The description of the parts overlapping with the above-described features will be omitted.

The touch screen A100 may include a base substrate A110 and an electrode A120 disposed on the base substrate A110 to form a sensing region.

The electrode unit A120 includes a plurality of first electrode units A121 arranged in parallel in the first direction on the base substrate A110 and a plurality of first electrode units A121 arranged in parallel in the second direction on the base substrate A110, The second electrode unit A122 may be provided.

By way of example, referring to Fig. 14, the first direction may be a transverse direction, and the second direction may be a longitudinal direction.

For example, the first electrode unit A 121 and the second electrode unit A 122 may be in the form of a plate, not in the form of the microwire described above.

In addition, the first electrode unit A 121 and the second electrode unit A 122 may be formed at the same height without intersecting each other.

For example, a first wiring line K1 and a second wiring line K2 may be formed on the first electrode unit A 121 and the second electrode unit A 122, respectively, to be connected to the controller 200.

For example, the second electrode unit A122 may be continuously extended in the first direction, and a plurality of the second electrode units A122 may be spaced apart from each other in the second direction, ). &Lt; / RTI &gt;

For example, the first electrode unit A121 may be separated from the second electrode unit A122 in the second direction without being in contact with the second electrode unit A122, Electrode part (A122).

As a result, a plurality of the first electrode units A 121 may be electrically connected to each other in the second direction.

Here, the base substrate A110 may form a predetermined arrangement space S.

Furthermore, the base substrate A110 may include a bridge portion A114 which is electrically connected to the plurality of first electrode portions A121 and is disposed on the arrangement space S.

In addition, for example, the base board A 110 may further include a base portion A 111 and a cushioning portion A 112 formed on the base portion A 111, (S) can be formed.

Here, for example, the buffering portion A112 may form an end portion D that prevents the bridge portion A114, which is disposed in the arrangement space S, from swinging.

The base substrate A110 may further include an insulation part A113 arranged in the arrangement space S and implementing insulation between the first electrode part A121 and the second electrode part A122 have.

Hereinafter, a manufacturing method of the capacitive large size electronic whiteboard 10 will be described in more detail with reference to FIGS. 14 to 17. FIG.

As shown in FIG. 17A, the manufacturing method of the capacitive large size electronic whiteboard 10 may include the step of forming the buffering part A112 on the base part A111.

For example, the base A111 may be a tempered glass, a reinforced PMMA, a polycarbonate coated with a reinforcing film, and a polyethylene terephthalate (PET).

The buffer part A112 may be formed on the base part A111 and the buffer part A112 may be formed as one layer and the first buffer part A112 And a second buffer A112 on the first buffer A112.

The buffer A112 may be a transparent insulator of a high refractive index, a transparent insulator of a low refractive index, or two layers of a transparent insulator of a low refractive index laminated on a transparent insulator of a high refractive index.

Here, as shown in Fig. 17 (b), the manufacturing method of the capacitive large size electronic whiteboard 10 may include the step of forming the arrangement space S by processing the buffer part A112.

The arrangement space S may be formed by RIE (Reactive Ion Etcher) or ICP (Induction Coupled Plasma) RIE or may be formed by dry etching using a laser patterning mask capable of laser patterning and a laser, But may be formed by various methods from the standpoint of those skilled in the art.

Here, when forming the arrangement space S, an end portion D for restraining the edge of the bridge portion A114 to prevent the swinging motion of the bridge portion A114 to be disposed on the arrangement space S .

Thereafter, as shown in Fig. 17C, the manufacturing method of the capacitive large-size electronic whiteboard 10 may further include forming the bridge portion A114 on the arrangement space S .

Although not shown in the drawing, for example, the bridge portion A114 disposed on the arrangement space S may be disposed so as to protrude further in the height direction than the upper surface of the buffer portion A112.

As a result, the bridge unit A114 and the first electrode unit A121 disposed on the buffer part A112 can be brought into more precise contact with the bridge unit A114.

The bridge portion A114 may have an elliptical shape and an elastic material as a whole.

As a result, when the first electrode unit A121 is disposed on the bridge unit A114, the bridge unit A114 can be more accurately brought into contact with the first electrode unit A121 by elasticity.

17 (d), the manufacturing method of the capacitive large size electronic whiteboard 10 may further include the step of forming the insulating portion A113 on the arrangement space S. In this case,

The insulation part A113 can realize insulation between the first electrode part A121 and the second electrode part A122 and can realize insulation between the bridge part A114 and the second electrode part A122 It is possible.

Thereafter, as shown in FIG. 15, the manufacturing method of the capacitive large size electronic whiteboard 10 may further include the step of forming the electrode unit A120 on the buffer A112.

For example, the first electrode unit A 121 and the second electrode unit A 122 may be disposed at predetermined positions on the buffer A112, and the plurality of first electrode units A121 may be disposed at a predetermined position on the buffer A112. And the electrical connection in the second direction can be realized by the part A114.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

100: Touch screen
200:
300:
400:

Claims (11)

A touch screen forming a touch sensitive area of an object; And
And a controller for sensing the touch based on the capacitance when the object touches the touch sensing area of the touch screen,
The touch screen,
A base substrate, and an electrode portion disposed on the base substrate to form a sensing region,
The electrode unit includes:
A plurality of first electrode units arranged in parallel in the first direction on the base substrate and a plurality of second electrode units arranged in parallel in the second direction on the base substrate,
The base substrate includes:
A predetermined arrangement space is formed,
The base substrate includes:
And a bridge portion that is electrically connected to the plurality of first electrode portions and disposed on the arrangement space,
The base substrate includes:
A base portion, and a buffer portion formed on the base portion,
The buffering portion
Forming the arrangement space,
Capacitive type large electronic board.
The method according to claim 1,
The buffering portion
And an end portion for preventing the bridging of the bridge portion disposed in the arrangement space,
Capacitive type large electronic board.
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