KR20180012678A - Mobile terminal apparatus - Google Patents

Abstract

Provided is a terminal which can improve a wireless charging function while maintaining high communication speed. According to the present invention, the terminal comprises: an antenna and a rear metal substrate arranged on the upper side of the antenna. The rear metal substrate may include a first metal substrate and a second metal substrate separated from the first metal substrate. The antenna may include an insulating layer, a first line formed on a first surface of the insulating layer, and a second line formed on a second surface of the insulating layer. The start and end points of the first and second lines can be electrically connected.

Description

[0001] MOBILE TERMINAL APPARATUS [0002]

The present invention relates to a terminal device, and more particularly to a terminal device including an antenna.

As wireless communication application technology is applied in various forms, much attention has been focused on a broadband antenna that can be applied to various systems. An NFC (Near Field Communication) antenna is one of RFID (Radio Frequency Identification) and transmits data between terminals at a distance of about 10 cm by using a non-contact type short-range wireless communication method. The NFC antenna is characterized by the extended concept of RFID, which can operate the terminal with the built-in tag in the active mode, so that not only the function as a tag but also a reader that reads the tag, Writer performs this function and bidirectional communication between the terminal and the terminal is possible. Also, it is used in various applications due to its low cost, light weight, and easy manufacturing.

The rapid popularization of NFC antennas has been implemented in smartphones. In recent years, SmartBoam has become more and more popular as a wireless charging function has become a popular issue as it is required to perform more various tasks for a longer period of time. As a method for improving the performance of an antenna, there are a method of using a thick substrate with a low dielectric constant, a parasitic patch method using a multi-layer structure or a multi-planar structure, a method of improving the structure of a feeder line, And the like.

For example, in Korean Patent No. 10-1306897, as shown in FIG. 1, there is known a technique of cutting a part of a metal substrate on the rear side of a terminal to form a T-shaped slit. This can increase the antenna bandwidth, and there is no need to increase the thickness of the rear metal substrate, which is advantageous for weight reduction. However, such a method has a disadvantage in that it is difficult to solve the vulnerability of a narrow impedance bandwidth, and there is a limit to the change of the terminal structure.

Korean Patent No. 10-1306897

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a terminal device capable of maintaining a high communication speed and improving a wireless charging function.

In order to solve such a problem, a terminal according to the present invention includes an antenna and a rear metal substrate disposed on the antenna. The rear metal substrate may include a first metal substrate and a second metal substrate spaced apart from the first metal substrate. In addition, the antenna may be superimposed on one or both of the first metal substrate and the second metal substrate. In addition, the antenna may include an insulating layer, a first line, and a second line. The first line may be formed on a first surface of the insulating layer, and the second line may be formed on a second surface of the insulating layer. Further, the start point and the end point of the first line and the second line may be electrically connected.

The rear metal substrate may further include a first interface that is one side of the first metal substrate and a second interface that is a side of the second metal substrate. In addition, the first interface and the second interface may face each other and maintain an interval of 0.01 mm to 5 mm.

The rear metal substrate may further include an opening, and may be formed on one or both of the first metal substrate and the second metal substrate.

Further, the opening may be formed over the first interface and the second interface.

In addition, the first interface and the second interface may be formed in the minor axis direction of the terminal.

In addition, the first interface and the second interface may be formed in the major axis direction of the terminal.

According to the terminal of the present invention, various antennas can be applied in the terminal, and the present invention can be applied to a wide range of impedances.

In addition, it is possible to provide a fast charging speed of the terminal and overcome the communication speed obstacle of the terminal antenna.

Further, the transmission lines of the antenna can be arranged in parallel to reduce the resistance, thereby solving the heat generation problem in the terminal.

In addition, since the terminal thickness can be reduced and the antenna device is provided with a simple and easy process, the process yield can be increased and further economical effect can be expected.

Therefore, ultimately, it is convenient for consumers who use the terminal for a long time.

1 is a diagram illustrating a terminal according to a comparative example of the present invention.
2 is a perspective view illustrating a terminal according to an exemplary embodiment of the present invention.
3 is a view illustrating a structure of an antenna according to an exemplary embodiment of the present invention.
4 is a cross-sectional view of an antenna according to an exemplary embodiment of the present invention.
5 illustrates a terminal according to exemplary embodiments of the present invention.
6 and 7 are views illustrating a terminal according to another embodiment of the present invention.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures may be exaggerated to illustrate the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprising" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof. In addition, A and B are 'connected' and 'coupled', meaning that A and B are directly connected or combined, and other component C is included between A and B, and A and B are connected or combined .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not. Also, in the claims of a method invention, each step may be reversed in order, unless the steps are clearly constrained in order.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a view showing a terminal applied in the prior art, and FIG. 2 is a perspective view showing a terminal 1000 according to an exemplary embodiment of the present invention. 5 to 7 are views illustrating a terminal 1000 according to another embodiment of the present invention.

Referring to FIG. 1, in the conventional terminal, a rear metal substrate 200 is divided into an upper substrate and a lower substrate, and a lower substrate is partially cut to form a slit structure 240. The antenna 100 may be disposed below the slit structure 240 or the antenna 100 may surround the slit structure 240 with a U-shape. In addition, the antenna 100 used in this conventional technique has a transmission line disposed above the insulating layer and has a cross section.

2, a terminal 1000 according to an embodiment of the present invention includes an antenna 100 and a rear metal substrate 200 disposed on the antenna 100. As shown in FIG. The rear metal substrate 200 may include a first metal substrate 210 and a second metal substrate 220 spaced apart from the first metal substrate 210. In the terminal 1000, slots are formed at regular intervals while the first metal substrate 210 and the second metal substrate 220 are separated, and electromagnetic waves can be directly radiated into the slots. At this time, the directivity becomes sharp, and the performance of the antenna can be improved.

FIG. 3 is a view showing a structure of an antenna 100 according to an exemplary embodiment of the present invention, and FIG. 4 is a diagram showing a cross section of an antenna 100.

3 and 4, the antenna 100 may include an insulating layer 110, a first line 120, and a second line 130. The first line 120 may be formed on a first surface of the insulating layer 110 and the second line 130 may be formed on a second surface of the insulating layer 110. The first line 120 and the second line 130 may be electrically connected to each other. The viewpoint 122 of the first line 120 can be connected to the viewpoint 132 of the second line 130 and the viewpoint 112 connecting each viewpoint to the insulating layer 110 . The end point 124 of the first line 120 and the end point 134 of the second line 130 can be connected to each other and the end point portion 114 to which the end points are connected in the insulating layer 110 .

Also, the antenna 100 may start current from each time point and flow in parallel to the first line 120 and the second line 130. Accordingly, the resistance in the antenna 100 can be reduced, and heat generation can be prevented, and the efficiency can be improved. Further, it can contribute to enhancement of durability of the terminal as compared with the prior art.

The rear metal substrate 200 may further include a first interface 212 that is a partial surface of the first metal substrate 210 and a second interface 222 that is a partial surface of the second metal substrate 220 And the first interface 212 and the second interface 222 may face each other. In addition, the distance d between the first interface 212 and the second interface 222 can be maintained between 0.01 mm and 5 mm. When the distance d between the first interface 212 and the second interface 222 is narrowed to less than 0.01 mm, the influence of the electromagnetic wave is hardly improved. As the distance d increases, the performance of the antenna improves However, if it exceeds 5 mm, the transmission / reception function of the antenna may be deteriorated.

Also, the antenna 100 may be overlapped with one or both of the first metal substrate 210 and the second metal substrate 220. Referring to FIG. 6, the antenna 100 may overlap the second metal substrate 220, and a part of the antenna 100 may be interposed between the first interface 212 and the second interface 222 Can be protruded.

In addition, the rear metal substrate 200 may further include an opening 230. At this time, it may be formed on any one of the first metal substrate 210 (c) and the second metal substrate 220 (c) as shown in FIG. 5 (c), and may be formed in both of them.

The opening 230 may be formed over the first metal substrate 210 and the second metal substrate 220 as shown in FIGS. 2, 5 (b) and 5 (d).

In addition, the size and shape of the opening 230 are not specified but may be smaller than the size of the antenna 100. Further, the opening 230 may further include a camera or a sensor of the terminal 1000.

The first interface 212 and the second interface 222 are formed in the minor axis direction of the terminal 1000 as shown in FIGS. 2, 5A, 5B, and 5C, . 7 (d), the first interface 212 and the second interface 222 may be formed in the longitudinal direction of the terminal 1000. In this case,

In order to confirm the effect of the terminal 1000 of the present invention, the performance of the terminal of FIG. 1, which is a comparative example, and the terminals of FIGS. 2 and 5 to 7, which is an embodiment of the present invention, were measured. The results are shown in Table 1 below.

Card mode Read / Write Mode


F0
[MHz]


R
[mΩ]


I
[μH] ACR-
122U
Topaz
1K Ultralight Tltralight-C Desfire Tec Tile Spec
[Mm]
25?
20?
30?
30?
10?
15?
15? Comparative Example 1 57 24 35 36 13 18 17 13.30 285 1.71 Example 1 56 25 36 33 12 17 17 13.30 281 1.70 Example 2 57 24 35 36 14 18 17 13.30 275 1.66 Example 3 58 26 36 34 13 18 18 13.30 263 1.64 Example 4 57 24 35 36 14 18 17 13.30 286 1.73 Example 5 59 25 37 33 13 17 17 13.30 286 1.72 Example 6 58 25 37 35 15 18 16 13.30 274 1.67 Example 7 55 26 33 32 14 18 16 13.30 268 1.63 Example 8 56 24 37 33 13 17 17 13.30 284 1.77

Referring to Table 1, the resistance (R) and the inductance (I) were measured when a current of 13.30 MHz having the same resonance frequency (F0) was supplied to each of the terminals. In addition, the distance between the terminal 1000 and the wireless device was increased, and the presence or absence of recognition was confirmed, and the maximum distance that can be recognized was written. In addition, they were filled in to compare the reference conditions (Spec) required by each equipment.

As shown in FIG. 1, Comparative Example 1 is a conventionally used terminal and was measured by mounting an NFC antenna. Embodiment 1 is a terminal 1000 which is an exemplary embodiment of the present invention. The rear metal substrate 200 divided into the first metal substrate 210 and the second metal substrate 220 is used in FIG. 2, So that the upper end of the substrate 100 is positioned between the first interface 212 and the second interface 222. [ That is, the antenna 100 is disposed so as to cover only the second metal substrate 220. 5A, 5B, 5C, and 5D are diagrams for explaining the operation of the terminal 1000 shown in Figs. 5A, 5B, 5C, and 5D, Respectively. 6, the terminal 1000 of FIG. 6, the seventh and eighth embodiments of the present invention, the antenna 100 of FIG. 6 in which the first line 120 and the second line 130 are formed in parallel, ) Was used.

Comparing Comparative Example 1 with Examples 1 to 7 in Table 1, it can be seen that the resistance value and the inductance of the terminal according to the present invention do not deviate greatly from the measured values of the prior art. In particular, Examples 1, 4, 5 and 8 are equivalent to Comparative Example 1, which is a conventional technique.

In addition, ACR-122U was used as a device for measuring the compatibility between the terminal 1000 and the Card Mode device according to the comparative example and the above embodiments. All of the comparative examples and the examples satisfied the reference condition, and it can be confirmed that the comparative example 1 and the examples all have similar performance.

To measure the performance of the Read / Write mode, we used a variety of wireless devices such as Topaz, 1K, Ultralight, Ultralight-C, Desfire and TecTile. It was confirmed that all of the comparative examples and the examples satisfied the reference conditions and were of the same level.

Based on the above results, it can be seen that the terminal 1000 according to the present invention can improve the wireless transmission / reception performance due to a structural change of the preceding terminal. Moreover, it is possible to satisfy various functions by enabling both Read / Write mode, which is harder to send / receive than Card Mode.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1000: terminal
100: Antenna
200: rear metal substrate
210: first metal substrate
220: second metal substrate
212: first interface
222: second interface
230: opening

Claims (6)

And an antenna and a rear metal substrate disposed on the antenna,
Wherein the rear metal substrate comprises a first metal substrate and a second metal substrate spaced apart from the first metal substrate,
Wherein the antenna is simultaneously superimposed on one or both of the first metal substrate and the second metal substrate,
The antenna includes an insulating layer, a first line formed on a first surface of the insulating layer, and a second line formed on a second surface of the insulating layer, wherein the first line and the second line And the terminal is electrically connected.
The method of claim 1,
Wherein the back metal substrate further comprises a first interface that is one side of the first metal substrate and a second interface that is a side of the second metal substrate, the first interface and the second interface face each other with a gap of 0.01 Mm to 5 mm.
The method according to claim 2,
Wherein the rear metal substrate further comprises an opening and is formed on one or both of the first metal substrate and the second metal substrate.
4. The method of claim 3,
Wherein the opening is formed across a first interface and a second interface.
The method according to claim 2,
Wherein the first interface and the second interface are formed in the minor axis direction of the terminal.
The method according to claim 2,
Wherein the first interface and the second interface are formed in the major axis direction of the terminal.

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