KR101540590B1 - Touch screen device using micro wire - Google Patents

Abstract

The present invention relates to a touch screen device using microwires. A touch screen device using microwires according to the present invention includes a base substrate; And a micro-wire to which a portion of the base substrate is bonded to form a touch-sensitive region. Since the microwire forming the touch sensing area extends directly to the control unit provided with the controller, the process of bonding the FPCB and the electrode wire is unnecessary, so that the defective rate can be reduced. Also, by using micro-wires of fine metal lines, the transmittance of the touch screen device can be improved. In addition, the sensing sensitivity of the fine micro-wires can be increased through the resonance circuit. In addition, since the already manufactured micro-wires are bonded to the touch panel to form a touch screen device, printing, deposition processes, and expensive equipment are not required. In addition, the production cost can be reduced because the price is lower than that of ITO. In addition, since there is no separate bridge configuration, signal transmission efficiency is increased. Further, since the electrode wiring is unnecessary, the front surface of the touch screen device can function as the touch sensing area without the bezel area.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch screen device using a micro wire,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch screen device using microwires, and more particularly, to a capacitive touch screen device using microwires.

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 can be applied to a flat display device such as an electronic notebook, a liquid crystal display device (LCD), a plasma display panel (PDP), and an electro luminescence (EL) And is a tool used by a user to select desired information while viewing the image display apparatus. 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 capacitor can charge the inside of the capacitor, blocking the flow of the direct current, and passing the alternating current. 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 and a mutual-capacitive type, 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 display 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. At this time, when the optical characteristics (transmittance) are decreased, more power is consumed for the same luminance, which is a disadvantage in mobile devices.

The G1F method and the GF2 method are external structures in which one film sensor is inserted between the cover glass and the display 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 divided into a self-capacitance method and a mutual-capacitance method 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 have been studied as transparent materials that can replace ITO. Studies on touch screen devices based on metal mesh, which are opaque but have good conductivity and low cost, have been conducted ought.

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. Because of the use of highly conductive metal, it has the advantage of a very low resistance, but it has a drawback that the transmittance is relatively low. Despite the drawbacks of low transmittance, the production cost is low and is utilized in a large touch screen. 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 expensive and expensive manufacturing equipment.

The touch screen device has an active area for forming a touch sensing area and an inactive area for forming an electrode wiring in the touch panel. The electrode wiring is electrically connected to the electrode or the metal line of the touch region. The electrode wiring is formed in an inactive region of the touch panel, and is gathered to one side and electrically connected to the control unit through a flexible printed circuit board (FPCB). The electrode wiring of the touch panel and the FPCB are bonded and electrically connected. In this process, the defective rate due to contact failure increases. Further, an additional process for bonding the electrode wiring and the FPCB is required, which requires a large amount of cost for the process equipment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch sensing device capable of reducing the defective rate by eliminating the need for an electrode wiring and an adhesion process between an electrode wiring and an FPCB by extending a micro wire forming a touch sensing area, Screen device.

It is still another object of the present invention to provide a touch screen device using a micro wire capable of manufacturing a large-sized touch screen and reducing a production cost by manufacturing a touch screen device by bonding micro wirings having a fine width have.

According to an aspect of the present invention, there is provided a touch screen device using microwires. A touch screen device using microwires according to the present invention includes a base substrate; And a micro-wire to which a portion of the base substrate is bonded to form a touch-sensitive region.

The micro-wires further include a plurality of first micro-wires arranged in parallel in a first direction on one surface of the base substrate; And a plurality of second micro-wires arranged in parallel in a second direction on one surface of the base substrate.

The first and second microwires are adhered to the same surface of the base substrate, adhered to both sides of the base substrate, or bonded to different base substrates, respectively.

The microwire is also connected directly to the board with the controller or via a connector.

The touch screen device includes: a frequency generator for generating a scanning signal for sensing a capacitive touch of an object; A scan switching circuit for selecting one of a plurality of first micromirrors and a plurality of second micromirrors to transmit a scanning signal; And an inductor for providing an inductive capacitance component for resonating with a corresponding electrostatic capacitance component generated when an object has a capacitive touch at an intersection area of the first microwire and the second microwire through which the scanning signal is transmitted, A resonance circuit for outputting a resonance signal; A receiving circuit for receiving a resonated or non-resonated scanning signal through a resonant operation circuit; And a controller for controlling the scan switching circuit for periodic scanning and a controller for discriminating the capacitive touch of the object based on the received scanning signal through the receiving circuit.

The inductor of the resonance circuit includes a fixed inductor whose inductance is fixed or a variable inductor whose inductance is variable, and includes a variable switching circuit for varying a capacitance component of the inductor.

And the microwire is a center member made of a conductive material; And an insulating member formed to surround the outside of the center member and for electrical insulation.

The center member is made of carbon fiber, carbon nanotube, graphene, and silver nano wire.

And a metal member provided between the center member and the insulating member.

The microwire may also include a central member made of a nonconductive material; A peripheral member formed to surround an outer side of the center member and made of a conductive material; And an insulating member formed to surround the peripheral member and for electrical insulation.

The central member is made of aramid, which is a nonconductive material.

Since the microwire forming the touch sensing area extends directly to the control unit provided with the controller, the process of bonding the FPCB and the electrode wire is unnecessary, so that the defective rate can be reduced. Also, by using micro-wires of fine metal lines, the transmittance of the touch screen device can be improved. In addition, the sensing sensitivity of the fine micro-wires can be increased through the resonance circuit. In addition, since the already manufactured micro-wires are bonded to the touch panel to form a touch screen device, printing, deposition processes, and expensive equipment are not required. In addition, the production cost can be reduced because the price is lower than that of ITO. In addition, since there is no separate bridge configuration, signal transmission efficiency is increased. Further, since the electrode wiring is unnecessary, the front surface of the touch screen device can function as the touch sensing area without the bezel area.

1 and 2 are views showing a touch screen device using a micro wire according to an embodiment of the present invention.
3 is a view showing a touch screen device in which a micro-wire and a board are connected using a connector.
4 is a view showing a state in which micro-wires are bonded to different base substrates.
5 is a view showing a state where microwires are bonded to different surfaces of a base substrate.
Figure 6 is a view showing micro-wires of various embodiments.
7 is a cross-sectional view showing various types of microwires.
8 is a view for explaining a touch input sensing method by a resonance operation circuit.
9 is a circuit showing a resonant operation circuit including a variable inductor.
10 is a diagram illustrating various configurations of the matching circuit.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

1 and 2 are views showing a touch screen device using a micro wire according to an embodiment of the present invention.

1 and 2, a touch screen device 10 according to the present invention includes a base member 40, a plurality of first and second micro wirings 42 and 46 formed on one surface of a base substrate 40, And a board 48 to which a plurality of first and second microwave wires 42 and 46 are connected. The base substrate 40 may be a transparent substrate such as a glass substrate, a film substrate, a fiber substrate, a paper substrate, or the like, and is not particularly limited. On the same side of the base substrate 40, first and second microwires 42 and 46 are formed in a mattress structure to form an active region (AR) capable of sensing a touch position of a user.

The plurality of first micro-wires 42 are arranged in parallel on the one surface of the base substrate 40 so as to be spaced apart from each other in a first direction (for example, the Y-axis direction). The plurality of second micro-wires 46 are arranged in parallel so as to be spaced apart from each other in the second direction (for example, the X-axis direction) while intersecting the first micro-wires 42. The first and second microwires 42 and 46 in the present invention are bonded to the base substrate 40 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 and second microwires 42 and 46 are formed in a matrix structure to detect the touch position coordinates of the user according to the capacitance method. The first and second microwires 42 and 46 function as an electrode including a conductive metal component such as copper, silver, and the like. Basically, the first and second microwires 42 and 46 may be composed of a center member of a metal component and an insulating member surrounding the center member. The first and second microwires 42 and 46 may be formed in various shapes.

The touch screen device 10 of the present invention determines whether or not the touch is performed by any one of a self-capacitance method and a mutual-capacitance method. In the self-capacitance type method, a signal is transmitted to either the first micro-wire 42 or the second micro-wire 46, and a change in capacitance is checked to detect whether or not a touch is made. In the mutual capacitance type, the first micro-wire 42 or the second micro-wire 46 functions as a driver line and the remainder as a sensing line. A voltage is applied to the driver line, and a capacitance is generated as the sensing line is electrically connected to the driver line. Here, the first micro-wire 42 and the second micro-wire 46 each have a self-capacitance with respect to the ground, and mutual capacitance exists between the first and second micro-wires 42 and 46. At this time, when the object is touched, an electrostatic capacity is generated between the object and the first and second microwires 42 and 46, so that the magnetic capacitance values of the first and second microwires 42 and 46, The mutual capacitance value between the wires 42 and 46 is changed. The controller 48a of the board 48 senses the change of the self capacitance value or the change of the mutual capacitance value, thereby confirming the presence or absence of the touch and the touch position.

The first and second microwires 42 and 46 are bonded to the base substrate 40 to form a touch sensing section 42-1 and 46-1 functioning as a touch sensing region and a signal transmission section 42-2 , 46-2). The signal transmission sections 42-2 and 46-2 are not attached to the base substrate 40 and have a flexible shape. The signal transmission sections 42-2 and 46-2 of the first and second microwires 42 and 46 may be bundled and fixed in a bundle shape or may be bonded and fixed with a bond.

The board 48 is connected to the signal transmission sections 42-2 and 46-2 of the first and second micro-wires 42 and 46. [ Here, the plurality of first and second microwires 42 and 46 in the form of a bundle may be spread out in a planar fashion and directly bonded to the board 48 to be electrically connected to the controller 48a. As shown in FIG. 1, the touch screen device 10a may include first and second microwires 42 and 46 connected to one side of the board 48, The first and second microwires 42 and 46 may be connected to each other on both sides of the board 48. [ The board 48 is provided with a controller 48a which has a driving circuit for driving the first and second microwires 42 and 46 and is capable of transmitting a signal or receiving a touch sensing signal to confirm the touch sensing position.

The touch screen device 10 according to the present invention may form a touch sensing area using one continuous micro-wire, and may be connected to the board 48 continuously. Therefore, the touch screen device 10 of the present invention does not require a separate FPCB, and there is no section where the adhesive is connected, thereby reducing the defect rate generated in the bonding process. Unlike the conventional method of depositing or printing metal lines, a method of bonding micro wirings already formed of finished products is used. There is a problem that the density of the metal component included in the metal line is lowered when the metal line is printed or deposited and the signal transmission efficiency and the sensing efficiency are lowered and the production cost is increased due to the expensive processing equipment for metal line deposition and printing . The microwire according to the present invention has a high density of the metal component and a low resistance so that the current flow is improved, thereby improving the signal transmission efficiency and sensing efficiency. In addition, since the touch screen device is manufactured by bonding the microwire already produced as the finished product, the manufacturing facility can be simplified and the production cost can be reduced. Also, since one of the first and second microwires 42 and 46 uses one continuous micro-wire without a separate bridge structure, signal transmission efficiency is increased. Further, since the electrode wiring is unnecessary, the front surface of the touch screen device can function as the touch sensing area without the bezel area.

The base substrate 40 of the present invention may be formed of a film or a glass substrate, and may be positioned between the window glass and the display panel to form a touch sensing area. The first and second microwires 42 and 46 may be directly bonded to the display panel or may be bonded to the window glass to form a touch sensing area.

3 is a view showing a touch screen device in which a micro-wire and a board are connected using a connector.

3, the touch screen device 10a has the same configuration as the touch screen device 10 described above. The first and second micro wires 42 and 46 are connected to the first and second connectors 72 and 74, The board 48 may be connected to the board 48 by a cable. The plurality of first and second microwires 42 and 46 are connected to the first and second female connectors 72a and 74a and the board 48 is provided with the first and second male connectors 72b and 74b. The first and second female connectors 72a and 74a are engaged with and electrically connected with the first and second male connectors 72b and 74b. The connector can be used for convenient connection. Although not shown in the drawing, the first and second micro wirings 42 and 46 may be connected to a connector by being collected at one side of the board 48. [ In the present invention, one connector structure is described as an example, and various types of connectors can be modified.

FIG. 4 is a view showing a state where microwires are bonded to different base substrates, and FIG. 5 is a view showing a state where microwires are bonded to different surfaces of the base substrate.

4, the touch screen device 10b has the same structure as that of the touch screen device 10 described above. The first micro wire 42 and the second micro wire 46 are formed on different base substrates 40a And 40b, respectively. In other words, a plurality of first micro-wires 42 are arranged and bonded in parallel in the Y-axis direction on the base substrate. A plurality of second micro-wires 46 are arranged and bonded in parallel in the X-axis direction on another base substrate. The first and second micro wirings 42 and 46 bonded to the two base substrates form a matrix structure, and function as a touch sensing area by an electrostatic capacity method.

5, the first micro-wires 42 are arranged in the Y-axis direction on one surface of one base substrate, and the second micro-wires 46 are bonded on the other surface of the base substrate in the X- Thereby forming a screen device 10d. Therefore, the first and second micro wirings (42, 46) are bonded to both sides of the base substrate to form a matrix structure, thereby functioning as a touch sensing area by the capacitive method.

Figure 6 is a view showing micro-wires of various embodiments.

6A, the first and second microwires 42a and 46a include a metal member 43 and a metal member 43 that are formed to surround the carbon fiber 41 and the carbon fiber 41, And an insulating layer 45 formed so as to surround the layer. The carbon fiber 41 refers to a fiber composed of at least 90% carbon and is utilized as a lightweight material having high strength / high elasticity. Typical characteristics of carbon fiber are 1/5 of lightweight, ten times stronger than steel, and high elasticity. Therefore, by using the microwire including the carbon fibers 41, it is possible to manufacture a touch screen device having improved conductivity, strength, and weight. The metal member 43 is formed so as to surround the carbon fibers 41. The metal member 41 not only affects the conductivity enhancement of the first and second micro wirings 42a and 46a but also makes it possible to firmly maintain the shapes of the first and second micro wirings 42a and 46a. The insulating layer 45 allows the first and second microwires 42a and 46a to be electrically insulated from the outside.

6B and 6C, the first and second microwires 42b and 46b are formed of an insulating layer (not shown) formed to surround the carbon fiber 41 layer in the central region and the carbon fiber 41 layer 45). The first and second microwires 42c and 46c may be formed of a metal member 43 in the central region and an insulating layer 45 formed to surround the metal member 43.

As shown in Fig. 6 (d), the first and second microwires 42d and 46d may include nonconductive materials such as nonconductive fibers in the central region. The first and second microwires 42d and 46d are electrically connected to each other by a nonconductive member 47 in the center region and a conductive member 49 and a conductive member 49 surrounding the nonconductive member 47, 45). Conductive member 47 as a non-conductive material is formed in the central region and an electrical signal is transmitted through the conductive member 49 by coating the surface of the non-conductive member 47 with a conductive member 49 as a conductive material. Here, the nonconductive member 47 may be formed of aramid. The aramid fiber refers to an aromatic polyamide fiber and is characterized by having a very excellent tensile strength and elastic modulus as compared with an organic fiber or having excellent heat resistance. Aramid fiber has excellent properties such as high strength, high elasticity and low shrinkage and is called super fiber or magic yarn and is used in tire cord or aerospace field. Also, it has the greatest heat resistance and is used in fireproof clothing, filter bags for high-temperature dust collection and so on.

7 is a cross-sectional view showing various types of microwires.

Referring to FIG. 7, the first and second microwires 42 and 46 may be formed to have a circular cross section. The first and second microwires 42 and 46 may be coated with an insulating layer 45 for electrical insulation to a center member made of conductive carbon fiber 41 or metal member 43. The first and second microwires 42e and 46e may be formed to have a rectangular cross section. The first and second microwires 42e and 46e may be coated with an insulating layer 45_1 for electrical insulation to a center member made of conductive carbon fiber 41_1 or metal member 43_1. Although not shown in the drawing, the first and second microwires 42 and 46 may be formed in various shapes in cross section because the ratio of the bonding surface bonded to the base substrate 40 varies depending on the sectional shape. The micro-wires 42 and 46 may be formed in various embodiments as shown in FIG.

8 is a view for explaining a touch input sensing method by a resonance operation circuit.

Referring to FIG. 8, the scanning signal generated in the frequency generator 10 is output to the first and second microwires 42 and 46 selected by the scan switching circuit 30. At this time, when there is no touch of the object 24 on the first and second microwires 42 and 46 to which the scanning signal is outputted, the non-resonance signal is received by the receiving circuit 50, It is determined that there is no touch of the object 24 in the area. On the other hand, when a capacitive touch of the object 24 occurs on the first and second microwires 42 and 46, the corresponding electrostatic charge generated between the object 24 and the first and second microwires 42 and 46 The resonance occurs by the capacitance component 23 and the inductor 22 of the resonance operation circuit 20. The resonant scanning signal is received by the receiving circuit 50 and the controller 60 determines that there is a touch of the object 24. [ If there is no touch of the object 24 on the first and second microwires 42 and 46 that are driven by outputting the scanning signal, the difference between the voltage level of the scanning signal and the voltage level of the resonated scanning signal . The controller 60 sequentially outputs a scanning signal to the scan switching circuit 30 to determine whether or not the object 24 is touched. The resonant circuit 20, the scan switching circuit 30 and the receiving circuit 50 are provided on the board 48 and controlled by the controller 60. [ 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. A protective layer 40a is provided on the first and second microwires 42 and 46.

9 is a circuit showing a resonant operation circuit including a variable inductor.

Referring to Fig. 9, the resonance operation circuit 20 may be constituted by a variable inductor 22 capable of varying the inductance component. The switching operation of the variable switching tap 25 of the variable inductor 22 is controlled by the controller 60. [ The controller 60 can change the inductive capacitance component of the variable inductor 22 while appropriately switching the variable switching tabs 25 according to the positions of the plurality of first and second microwires 42 and 46. When the capacitive touch of the object 24 is generated because the lengths of the first and second micro wirings 42 and 46 connected to the first and second scan switching circuits 30 and 35 are different from each other The capacitance components 23 may be different from each other. And controls the variable inductor 22 so as to have an inductive capacitance component that can resonate appropriately in accordance with the variation of the electrostatic capacitance component 23 predicted thereby.

10 is a diagram illustrating various configurations of the matching circuit.

Referring to FIG. 10, the resonance operation circuit 20 as described above may be replaced with a matching circuit 70 of various structures. For example, the matching circuit 70 may be constituted by an inductor and a capacitor connected to the node at the front end or the rear end node of the inductor as shown in FIG. 11 (a) or (b). Alternatively, as shown in FIG. 10 (c), the inductor and the capacitor connected to the node at the front end and the node at the rear end thereof, respectively, may be grounded. Or two inductors connected in series and a capacitor connected to the connection node by a ground, as shown in FIG. 10 (d).

The embodiments of the touch screen device using the microwire of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. You will know the point.

Accordingly, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10, 10a, 10a-1, 10b, 10c, 10d:
1: Frequency generator 20: Resonant operation circuit
21: Resistor 22: Inductor
23: capacitance component 24: object
25: variable switching circuit 30: scan switching circuit
40, 40a, 40b: base substrate
40a: protective layer 41, 41_1: carbon fiber
42, 42a, 42b, 42c, 42d, 42e:
42-1, 46-1: Touch sensing section 42-2, 46-2: Signal transmission section
43, 43_1: metal member 45: insulating layer
46, 46a, 46b, 46c, 46d, 46e:
47: non-conductive member 48: board
48a: Controller 49: Conductive member
50: receiving circuit 51: amplifying circuit
52: analog-to-digital converter 60: controller
72: first connector 72a, 72b: first arm, male connector
74: second connector 74a, 74b: second arm, male connector

Claims (11)

Base substrate and
And a micro-wire to which a part of the micro-wire is bonded to one surface of the base substrate to form a touch-
A plurality of first micro-wires arranged in parallel in a first direction on one surface of the base substrate; And a plurality of second micro-wires arranged in parallel in a second direction on one surface of the base substrate,
The first and second microwires form a touch sensing area using one continuous micro-wire,
And an inductor for providing an inductive capacitance component for resonating with the corresponding electrostatic capacitance component generated when the object has a capacitive touch in the first micro-wire area and the first micro-wire area in which the scanning signal is transmitted, A resonance circuit,
Wherein the inductor of the resonance circuit includes a variable inductor capable of varying inductance and a variable switching circuit for varying a capacitance component of the inductor. delete The method according to claim 1,
Wherein the first and second microwires are adhered to the same surface of the base substrate, adhered to both surfaces of the base substrate, or bonded to different base substrates, respectively. The method according to claim 1,
Wherein the micro-wires are directly connected to the board provided with the controller or are connected through a connector. The method according to claim 1,
The touch screen device
A frequency generator for generating a scanning signal for sensing a capacitive touch of an object;
A scan switching circuit for selecting one of a plurality of first micromirrors and a plurality of second micromirrors to transmit a scanning signal;
A receiving circuit for receiving a resonated or non-resonated scanning signal through a resonant operation circuit; And
And a controller for controlling the scan switching circuit for periodic scanning and a controller for discriminating the capacitive touch of the object based on the received scanning signal through the receiving circuit. delete The method according to claim 1,
The microwire is a center member made of a conductive material; And
And an insulating member formed to surround an outer side of the center member and electrically insulated from the center member. 8. The method of claim 7,
Wherein the center member is made of carbon fiber, carbon nanotube, graphene, silver nano wire. 9. The method of claim 8,
And a metal member provided between the center member and the insulating member. The method according to claim 1,
The microwire is a central member made of a nonconductive material;
A peripheral member formed to surround an outer side of the center member and made of a conductive material; And
A touch screen device using micro-wires formed to surround peripheral members and including an insulating member for electrical insulation. 11. The method of claim 10,
The center member is a touch screen device using a micro wire made of aramid which is a nonconductive material.

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