WO2019125089A1

WO2019125089A1 - Permanent magnet structure for mobile device using conductive film as loop antenna

Info

Publication number: WO2019125089A1
Application number: PCT/KR2018/016553
Authority: WO
Inventors: 이승재
Original assignee: 주식회사 에이치시티엠
Priority date: 2017-12-22
Filing date: 2018-12-24
Publication date: 2019-06-27
Also published as: KR20190076321A; KR102007989B1

Abstract

A permanent magnet structure for a mobile device using a conductive film as a loop antenna according to an embodiment of the present invention comprises a housing which accommodates at least one component therein and is divided into one surface portion, the other surface portion, and a side face portion; a conductive film which is disposed outside the one surface portion of the housing; and an antenna pattern which is wound a plurality of times and is disposed outside the one surface portion of the housing, wherein the conductive film is electrically connected to the antenna pattern to form a loop antenna together with the antenna pattern.

Description

Permanent magnet structure for mobile devices using conductive film as loop antenna

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a permanent magnet structure for a mobile device using a conductive film as a loop antenna. More particularly, the present invention relates to a permanent magnet structure for a mobile device, To a permanent magnet structure for a mobile device using a conductive film as a loop antenna efficiently incorporating a loop antenna for short-range wireless communication.

A mobile device is a device that can exchange information such as voice, image, and data with a partner using a wireless network. In recent years, Near Field Communication (NFC) technology that performs data communication in a predetermined frequency band at a distance close to a mobile device, and a device that receives credit card information, And mobile payment technology such as magnetic secure transmission (MST), which is a payment method, are being applied to mobile devices. NFC stands for Near Field Communication, which means short-range wireless communication. It has a bandwidth of 13.56MHz and is a technology for wireless communication with a very short distance. Currently, the supported data communication speed is 424 kilobits per second and can be used for various services such as traffic, tickets, and payment. The NFC uses an electromagnetic induction principle, in which a loop antenna device is provided with an antenna pattern through which an electric current can flow, and when a current flows through the antenna pattern, a magnetic field is formed in the vicinity of the coil (electromagnetic induction) .

In order to realize such a technology, an antenna capable of transmitting and receiving a frequency signal and a magnetic force signal by resonance to a mobile device is installed inside a mobile device to implement the above-described data communication. However, since the mobile device has been miniaturized day by day with the development of technology, the area of the magnetic field generated by the conventional short-range wireless communication antenna is very narrow.

In recent years, there has been a technique of providing a single wireless module with a built-in short-range wireless communication antenna (loop antenna) in a speaker or receiver having a permanent magnet structure mounted on a mobile device, for example, a permanent magnet. However, since the mounting space designated to mount the respective modules is limited to a predetermined size in the mobile device, it is possible to mount both the receiver component and the loop antenna in a limited space, and simultaneously maintain the function of the receiver, It has been very difficult to derive a structure capable of satisfying the performance.

Therefore, there is a demand for development of a permanent magnet structure that can overcome such problems of the prior art.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a loop antenna capable of efficiently mounting a loop antenna so as to satisfy a size mountable in a limited mounting space, To provide a permanent magnet structure.

The objects of the present invention are not limited to those mentioned above, and other objects not mentioned may be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a permanent magnet structure for a mobile device, which uses a conductive film as a loop antenna according to an embodiment of the present invention. The permanent magnet structure includes at least one component therein and is divided into a first surface, housing; A conductive film disposed outside the one surface portion of the housing; And an antenna pattern that is wound a plurality of times and is disposed outside the one surface portion of the housing, wherein the conductive film is electrically connected to the antenna pattern to form a loop antenna together with the antenna pattern.

Meanwhile, a permanent magnet structure for a mobile device, which uses a conductive film according to an embodiment of the present invention as a loop antenna, includes a housing accommodating at least one component therein and being divided into a first face portion, a second face portion, and a side face portion; And a conductive film disposed outside the one side of the housing, wherein the side surface is electrically conductive and electrically connected to the conductive film to form a loop antenna together with the conductive film.

In addition, the conductive film may be disposed on one side of the housing, and the antenna pattern may be disposed on the conductive film.

The antenna pattern may be disposed on one side of the housing, and the conductive film may be disposed on the antenna pattern.

In addition, the conductive film may be an F-PCB.

The side portion may have electrical conductivity and may be electrically connected to the antenna pattern or the conductive film to form a loop antenna together with the antenna pattern and the conductive film.

In addition, the side portion may be formed of a metal material having electrical conductivity.

Further, a conductive film or an F-PCB having electrical conductivity may be attached to the side portion.

In addition, the side portion may be plated or printed with a conductive material having an outer surface electrically conductive.

In addition, the antenna pattern may be wrapped a plurality of times along a winding line along the outermost side of the housing, laminated by a predetermined height, then wound several times along another winding line located inside the winding line, As shown in FIG.

According to the permanent magnet structure for a mobile device using the conductive film according to the embodiment of the present invention as a loop antenna, the conductive film composed of the conductive film or the F-PCB, together with the antenna pattern, constitutes one loop antenna as a whole, There is an advantage that the number of turns of the antenna pattern for satisfying the signal transmitting / receiving performance required by the device is relatively reduced and the limited mounting space is effectively utilized.

In addition, while maintaining the longitudinal winding height of the antenna pattern within a limited range, there is an advantage that the antenna pattern can reduce the area occupied by one edge of the permanent magnet structure and maintain the signal transmission / reception performance.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1A is a conceptual diagram illustrating a permanent magnet structure for a mobile device using a conductive film according to a first embodiment of the present invention as a loop antenna.

1B is a conceptual diagram illustrating a modification of a permanent magnet structure for a mobile device using a conductive film according to a first embodiment of the present invention as a loop antenna.

2 is a plan view of a conductive film of a permanent magnet structure according to an embodiment of the present invention.

3 is a conceptual diagram comparing a permanent magnet structure according to an embodiment of the present invention and a permanent magnet structure according to a first comparative example.

4 is a conceptual diagram illustrating a permanent magnet structure for a mobile device using a conductive film according to a second embodiment of the present invention as a loop antenna.

5 is a conceptual diagram illustrating a permanent magnet structure for a mobile device using a conductive film according to a third embodiment of the present invention as a loop antenna.

In addition, the conductive film may be an F-PCB.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unnecessary. The terms described below are defined in consideration of the structure, role and function of the present invention, and may be changed according to the intention of the user, the intention of the operator, or the custom.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art to which the present invention pertains, It is only defined by the scope of the claims. Therefore, the definition should be based on the contents throughout this specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

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

[제1 실시예][First Embodiment]

FIG. 1A is a conceptual view illustrating a permanent magnet structure for a mobile device using a conductive film according to a first embodiment of the present invention as a loop antenna. FIG. 1B is a cross-sectional view of a conductive film according to a first embodiment of the present invention, FIG. 2 is a plan view of a conductive film of a permanent magnet structure according to an embodiment of the present invention. FIG. 2 is a plan view of a conductive film of a permanent magnet structure according to an embodiment of the present invention. Referring to the drawings, a permanent magnet structure 100 according to an embodiment of the present invention includes a housing 110, a conductive film 130, and an antenna pattern 150.

Here, the permanent magnet structure 100 refers to a unit module for a mobile device including a permanent magnet inside, for example, a receiver module or a speaker module. However, it is apparent to those skilled in the art that the permanent magnet structure 100 is not limited to a speaker module or a receiver module, but may be applied to all components of a mobile device in which a coil is wound around a permanent magnet.

The housing 110 is a casing for housing at least one component therein, and a component such as a permanent magnet, a voice coil, and a diaphragm is housed inside the housing 110. The housing 110 is divided into a first surface 110a, a second surface 110b and a side surface 110c. The shape of the first surface 110a is not limited. However, the shape of the first surface 110a corresponds to the shape of the mounting space. In FIG. 1A, a structure of a box-like hexahedron is exemplarily shown. The housing 110 may be injection molded using a plastic material and one side 110a and the other side 110b may be injection molded of a plastic material and the side 110c may be electrically conductive And can be injection-molded with a metal material having a predetermined width. This will be described below separately for each of the embodiments. In the first embodiment, the entire surface of the housing 110 is injection molded with plastic.

On the other hand, the conductive film 130 is disposed outside the one surface 110a of the housing 110. The conductive film 130 is electrically connected to the antenna pattern 150 to form a loop antenna. As shown in FIG. 2, the conductive film 130 has a spiral pattern along the outside of the one surface 110a of the housing 110 Lt; / RTI > The conductive film 130 may be formed of a conductive film or an F-PCB. The conductive film 130 may be formed by a photolithography process including exposure and etching for a flexible substrate (FPCB), an etching process Lt; / RTI >

The antenna pattern 150 is wound a plurality of times so as to be disposed outside the one surface 110a of the housing 110 so that the antenna pattern 150 becomes a loop shape. Specifically, the antenna pattern 150 is wound along a virtual winding line along the outer periphery of the one surface portion 110a of the housing 110, and is sequentially stacked one surface upward by a predetermined height while the number of winding times is plural. Then, when the stacking height reaches a preset height, the sheet is wound along another imaginary winding line located on the inner side of the winding line, and is formed in such a manner that the sheet is stacked upward by a predetermined height again while the number of winding is repeated a plurality of times. For example, as shown in Fig. 1A, three turns in the longitudinal direction (height direction) and two turns in the lateral direction (the plane direction) can be taken. The number of turn turns in the longitudinal direction or the transverse direction can be changed and applied in accordance with the performance of the short range wireless communication required for the antenna pattern 150. [

The conductive film 130 is electrically connected to the antenna pattern 150 to form a loop antenna together with the antenna pattern 150. [ The conductive film 130 is electrically connected to the antenna pattern 150 by solder bonding or the like to form one loop antenna together with the antenna pattern 150. Accordingly, the conductive film 130 and the antenna pattern 150 function as an antenna that transmits and receives an ENF signal, a magnetic security transmission signal, and the like while resonating with each other.

More specifically, a permanent magnet and a voice coil are wound around the permanent magnet structure 100, for example, inside the housing 110 of the receiver module. When an electric signal is applied to the voice coil, a voice is output while the diaphragm vibrates. In order to vibrate the diaphragm, a magnetic field region is formed so that signals with the voice coil resonate with each other. Accordingly, when the antenna pattern 150 is disposed in the magnetic field region and the magnetic field of the antenna pattern 150 is generated, mutual synergism occurs between the magnetic patterns and the transmission / reception efficiency is improved. 1A, the conductive film 130 is disposed on one side of the housing 110 of the permanent magnet structure 100, and the antenna pattern 150 is disposed on the conductive film 130 . It is also possible that the antenna pattern 150 is disposed on one side of the housing 110 of the permanent magnet structure 100 and the conductive film 130 is disposed on the antenna pattern 150 as shown in FIG. Since the conductive film 130 is disposed outside the one surface 110a of the housing 110 and has a spiral pattern and the antenna pattern 150 is disposed on or below the conductive film 130, The conductive film 130 and the antenna pattern 150 are formed in a spiral shape along one edge of the housing 110. The magnetic field generated by the permanent magnet of the receiver module amplifies the frequency signal of the conductive film 130 and the antenna pattern 150, thereby minimizing the influence on the external interference, The transmission / reception efficiency of the local communication signal can be improved.

The present invention is characterized in that the conductive film (130) is provided to function as a loop antenna together with the antenna pattern (150). That is, a part of the antenna pattern 150 is replaced with a conductive film 130 such as an F-PCB or a conductive film. The F-PCB has a conductive film formed on a flexible substrate. The thickness of the conductive film 130 can be adjusted by selecting the thickness of the flexible substrate in the manufacturing process, and the width of the conductive film 130 can be adjusted. That is, the conductive film 130 has a high degree of freedom in the shape of the pattern, the thickness and the width of the pattern. The present invention can replace a part of the antenna pattern 150 with the conductive film 130 so that it can be mounted in a limited mounting space of a mobile device and at the same time a structure capable of satisfying the performance required for short range wireless communication can be derived. Particularly, according to one embodiment of the present invention, there is an advantage that the area of the rim portion occupied by the antenna pattern 150 on the one surface of the permanent magnet structure 100 is reduced to maximize the L2 value.

3 is a conceptual diagram comparing a permanent magnet structure according to an embodiment of the present invention and a permanent magnet structure according to a first comparative example. 3, the conductive film 130 is formed on one side of the housing 110, the antenna pattern 150 is disposed on the conductive film 130, and the conductive film 130 is electrically connected to the conductive film 130, And the antenna pattern 150 constitute a loop antenna. In the comparative example 1 on the right side of FIG. 3, the loop antenna is constituted by the antenna pattern 150 alone.

The antenna pattern 150 is disposed on the upper side of the housing 110 in order to obtain equivalent radio signal transmitting and receiving performance in both of Embodiment 1 and Comparative Example 1. When only the antenna pattern 150 is used, The minimum number of turns must be met. As the antenna pattern 150 is heavily used, the height of the antenna pattern 150 is expanded in the longitudinal direction or the area occupied by the antenna pattern 150 is expanded in the lateral direction. If the antenna pattern 150 is laminated only in the longitudinal direction, the entire height of the antenna pattern 150 is not accommodated in the mounting space. On the contrary, if the antenna pattern 150 is disposed in the lateral direction, the antenna pattern 150 may excessively cover one surface of the housing 110 of the permanent magnet structure 100, Performance is poor. Therefore, there is a restriction that the height L1 must be satisfied so as to be mountable in the mounting space, and at the same time, the width L2 must be maintained so as not to deteriorate the signal transmitting / receiving efficiency of the loop antenna.

For example, assuming that the antenna pattern 150 needs to be wound for a minimum of 9 turns to satisfy the required transmission / reception performance, the antenna pattern 150 needs to be wound 9 times on one surface of the housing 110, do. However, since the stacking height is limited to L1, the antenna pattern 150 must be extended to the inside of the housing 110 of the receiver module, and thus the width L2 is narrowed, which causes the NFC performance of the loop antenna to deteriorate.

On the other hand, in the first embodiment, since the conductive film 130 functions as a loop antenna, even if the antenna pattern 150 is slightly wound, the target signal transmission and reception performance is satisfied. For example, even if the antenna pattern 150 is wound 6 turns, the target performance is achieved. Therefore, the width L2 can be made wider than the width of the comparative example 1. In addition, since the conductive film 130 is thinner than the antenna pattern 150, the overall height L1 can be satisfied even when the antenna pattern 150 is stacked three-dimensionally in the longitudinal direction on the conductive film 130. As a result, in the first embodiment, the structure of the permanent magnet structure satisfying both the width L2 and the height L1 and satisfying the NFC required performance can be obtained.

The permanent magnet structure 100 for a mobile device including the conductive film 130 according to an embodiment of the present invention includes a conductive film 130 and a loop antenna as a whole together with the antenna pattern 150 . Accordingly, in order to realize a specific signal transmission / reception performance, the number of times of winding the antenna pattern 150 can be reduced, and as a result, a structure capable of maintaining signal transmission / reception efficiency while satisfying the size of the mounting space can be obtained.

[제2 실시예][Second Embodiment]

4 is a conceptual diagram illustrating a permanent magnet structure for a mobile device using a conductive film according to a second embodiment of the present invention as a loop antenna. The permanent magnet structure 100 according to the second embodiment of the present invention includes the housing 110, the conductive film 130 and the antenna pattern 150. Since these structures are the same as those of the first embodiment, The description of the configuration is omitted, and the description of the first embodiment is used.

The second embodiment is different from the first embodiment in that the side surface of the housing 110 is electrically conductive and electrically connected to the conductive film 130 or the antenna pattern 150. [

Specifically, the side portions together with the conductive film 130 and the antenna pattern 150 form one loop antenna, which is electrically conductive. In order to impart electrical conductivity to the side surface portion, the side surface portion may be made of a metal material having electrical conductivity, for example, metal such as SUS, aluminum, or copper. Preferably, the side surface portion is formed using SUS. For example, at the time of manufacturing the housing 110, the housing 110 according to the second embodiment can be manufactured by injection-molding one side portion and the other side portion of a plastic material, and injection molding the side portion by SUS. In addition, a conductive film or F-PCB having electroconductivity may be attached to the surface of the side surface portion in order to impart electrical conductivity to the side surface portion. It is also possible to plate or print a conductive material having electrical conductivity on the surface of the side surface portion.

According to the second embodiment, the side surface portion is electrically connected to the conductive film 130 or the antenna pattern 150 to form a loop antenna. The side surface portion is electrically connected to the antenna pattern 150 or the conductive film 130 by solder bonding or the like to form a loop antenna together with the antenna pattern 150 and the conductive film 130. Accordingly, the side surface portion of the housing 110, the conductive film 130, and the antenna pattern 150 function as antennas transmitting and receiving ENF signals, magnetic security transmission signals, and the like while resonating with each other.

This structure replaces the area of the rim portion occupied by the antenna pattern 150 or the conductive film 130 on the one surface portion of the permanent magnet structure 100 by replacing the loop antenna with a side portion that is a part of the housing 110 There is an advantage of maximizing the L2 value. The detailed description is based on the first embodiment.

[제3 실시예][Third Embodiment]

5 is a conceptual diagram illustrating a permanent magnet structure for a mobile device using a conductive film according to a third embodiment of the present invention as a loop antenna. A permanent magnet structure 100 according to a third embodiment of the present invention includes a housing 110 and a conductive film 130. The housing 110 and the conductive film 130 have the same structure as that of the second embodiment. Particularly, as in the second embodiment, the housing 110 is electrically conductive to the side surface portion.

Specifically, the side portion is connected to the conductive film 130 to form one loop antenna, which is configured to have electrical conductivity. In order to impart electrical conductivity to the side portion, the side portion may be made of a metal material having electrical conductivity, or a conductive film or F-PCB having electroconductivity may be attached to the surface of the side portion in order to impart electrical conductivity to the side portion . It is also possible to plate or print a conductive material having electrical conductivity on the surface of the side surface portion.

On the other hand, the third embodiment is different in configuration from the second embodiment in that it does not include the antenna pattern. That is, the third embodiment does not include the antenna pattern, for example, the antenna coil, and uses the conductive film 130 instead of the antenna coil.

According to the third embodiment, the side surface portion is electrically connected to the conductive film 130 to form a loop antenna. The side surface portion is electrically connected to the conductive film 130 by solder bonding or the like, Together form a loop antenna. Accordingly, the side surface portion of the housing 110 and the conductive film 130 function as an antenna for transmitting and receiving the ENF signal, the magnetic security transmission signal, and the like while resonating with each other.

This structure replaces the loop antenna with a side portion that is a part of the housing 110. According to this structure, the area of the rim portion occupied by the conductive film 130 on the one surface portion of the permanent magnet structure 100 is reduced to maximize the L2 value There is an advantage. The detailed description is based on the first embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.

Claims

A permanent magnet structure for a mobile device using a conductive film as a loop antenna,

A housing which houses at least one component therein and is divided into a first face portion, a second face portion and a side face portion;

A conductive film disposed outside the one surface portion of the housing; And

An antenna pattern which is wound a plurality of times and is disposed outside the one surface portion of the housing;

/ RTI >

Wherein the conductive film is electrically connected to the antenna pattern to form a loop antenna together with the antenna pattern.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
A permanent magnet structure for a mobile device using a conductive film as a loop antenna,

A housing which houses at least one component therein and is divided into a first face portion, a second face portion and a side face portion; And

A conductive film disposed outside the one surface portion of the housing;

/ RTI >

Characterized in that the side portion has electrical conductivity and is electrically connected to the conductive film to form a loop antenna together with the conductive film.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
The method according to claim 1,

Wherein the conductive film is disposed on one side of the housing,

Characterized in that the antenna pattern is disposed on the conductive film.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
The method according to claim 1,

Wherein the antenna pattern is disposed on one surface of the housing,

Characterized in that the conductive film is disposed on the antenna pattern.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
3. The method according to claim 1 or 2,

Characterized in that the conductive film is an F-PCB.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
The method according to claim 1,

Wherein the side portion has electrical conductivity and is electrically connected to the antenna pattern or the conductive film to form a loop antenna together with the antenna pattern and the conductive film.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
3. The method of claim 2,

Wherein the side portion is formed of an electrically conductive metal material.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
3. The method of claim 2,

And an electrically conductive film or F-PCB is attached to the side portion.

Permanent magnet structure for mobile devices using conductive film as loop antenna.
3. The method of claim 2,

Wherein the side portion is plated or printed with an electrically conductive material whose outer surface is electrically conductive,

Permanent magnet structure for mobile devices using conductive film as loop antenna.
The method according to claim 1,

The antenna pattern is wrapped a plurality of times along a winding line along the outermost side of the housing, laminated by a preset height, then wound along another winding line located inside of the winding line a plurality of times, Wherein the first electrode is formed in a laminated manner.

Permanent magnet structure for mobile devices using conductive film as loop antenna.