KR101554129B1 - Flexible printed circuit board for wireless communications - Google Patents

Abstract

The present invention relates to a flexible printed circuit board for wireless communications for increasing a winding diameter and a wining number on a base film (10) to maximize the wireless communication efficiency of a center loop pattern (20). In the present invention, the winding diameter of the center loop pattern (20) is extended to reach the outer circumference of the base film (10). For this, the center loop pattern (20) is wound in any one region of the upper and lower sides of a center region (11). A middle loop pattern (30) is wound in any one region of the upper and lower sides of a middle region (12). An overlap pattern line (33) to overlap without a connection with the center loop pattern (20) is formed. As a result, the outer circumference of the center loop pattern (20) is extended and the middle loop pattern (30) is connected to the overlap pattern line (30). Thereby, the center loop pattern (20) and the middle loop pattern (30) secure the wireless communication efficiency.

Description

[0001] FLEXIBLE PRINTED CIRCUIT BOARD FOR WIRELESS COMMUNICATIONS [0002]

The present invention relates to a flexible circuit board for wireless communication, and more particularly, to a flexible circuit board for wireless communication, which further extends the outer loop of the center loop pattern and connects the middle loop pattern to the overlap pattern line, To a flexible circuit board for wireless communication.

Generally, a mobile terminal is an intelligent terminal that adds computer support functions such as internet communication and information search to a mobile phone, and a smart phone that allows the user to utilize the Internet and various applications (application programs) while viewing a window displaying a screen .

Laid-Open Publication No. 2013-0113222 (an antenna and a mobile terminal equipped with the antenna) can be introduced as the prior art document 1.

FIG. 1A is a block diagram of a mobile terminal related to the prior art document 1. FIG.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video (A / V) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, A memory 160, an interface unit 170, a control unit 180, a power supply unit 190, and the like.

The wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, a location information module 115, (Audio / Video) input unit 120 is for inputting an audio signal or a video signal and may include a camera 121 and a microphone 122. The user input unit 130 is connected to the front and rear of the mobile terminal 100, A button 136 positioned on the side surface, and a touch sensor (static pressure / static electricity) 137.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100 and may include a proximity sensor 141. The output unit 150 generates an output related to visual, auditory or tactile sense, The display unit 151, the sound output module 152, the alarm unit 153, and the haptic module 154, for example.

The memory unit 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, For example.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The power supply unit 190 may include, for example, a battery, a connection port, a power supply control unit, and a charge monitoring unit.

1B is a rear perspective view of the mobile terminal according to the prior art document 1.

Referring to FIG. 1B, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. A flash 123 and a mirror 124 may be additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '.

1C is a plan view showing that the antenna 200 according to the prior art document is attached to the rear cover 103 of the mobile terminal 100. FIG.

1A to 1C, a front case 101, a rear case 102, a rear cover (or a battery cover 103), a camera 121 ', an interface 170, a microphone 122, A battery 191, a battery mounting portion 104, a USIM card mounting portion 105, and a memory card mounting portion 106 are shown.

The rear case 102 may have a space on which external components such as the battery loading unit 104, the USIM card loading unit 105, and the memory card loading unit 106 may be mounted. In general, the external component mounted on the surface of the rear case 102 is to expand the functions of the mobile terminal 100 in order to fulfill the diversified functions of the mobile terminal 100 .

The antenna 200 is required to perform wireless communication with an external device and a server while diversifying functions of the mobile terminal 100. [ An antenna 200 for receiving broadcast information such as an EPG (Electronic Program Guide) of a DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of a Digital Video Broadcast-Handheld (DVB-H) An antenna 200 for a wireless Internet such as HSDPA, GSM, CDMA, WCDMA and LTE, a Bluetooth (Short Range Communication) technology, a Radio Frequency Identification (RFID) UWB (Ultra Wideband), and an antenna 200 for ZigBee short-range wireless communication.

It is preferable that the antenna 200 is formed on a large area for reception of radio waves and is located on the surface side of the mobile terminal 100 so as not to be influenced by other electronic components. Therefore, as shown in FIG. 1C, the antenna 200 is disposed on the rear cover 103, which can secure a large area without mounting an electronic component.

The antenna 200 of the prior art document 1 has a soft substrate 210, two types of patterns, and a magnetic sheet 230 as shown in FIG. 1C.

The patterns are roughly divided into a high frequency pattern 220 and a low frequency pattern 225 in two types. That is, different frequency bands are used. The high frequency pattern 220 is suitable for wireless communication, and the low frequency pattern 225 is mainly suitable for wireless charging of a battery.

The wireless charging technique used in the mobile terminal 100 utilizes the electromagnetic induction principle.

The electromagnetic induction flows a current to form a magnetic field, and when the mobile terminal 100 is placed on the magnetic field, a current flows through the low frequency pattern mounted on the mobile terminal 100, that is, the wireless charging coil 225 to be charged.

 Generally, the power used in a small household appliance such as the mobile terminal 100 uses a relatively low frequency of several hundreds kHz or less, although the frequency may vary depending on the amount of power to be transmitted.

As the functions of the mobile terminal 100 are diversified, an antenna is required for the functions of Near Field Communication (NFC) and Radio Frequency Identification (RFID) in addition to transmission of radio waves for telephone conversation. Particularly, the frequency used is different according to the wireless communication technology, and the high frequency is used relative to the frequency used for wireless charging to transmit a large amount of data.

An example of a communication method in which the wireless communication antenna 200 of the prior art document 1 is used is near field communication (NFC). The short-range wireless communication is a kind of RFID (non-contact wireless communication module) using a frequency band of about 13.56 MHz.

Is a technology for transmitting data between terminals 100 at a distance of approximately 10 to 40 cm, and is a next generation local area communication technology that is relatively notable in security and low in price because of its short communication distance. Data reading and writing can both be used, and it is not necessary to set up between devices like Bluetooth, so that a near-field communication function is recently added to the mobile terminal 100.

However, in the antenna 200 according to the prior art document 1, the high-frequency pattern 220 and the low-frequency pattern 225 implemented in the flexible substrate 210 are kept apart from each other only considering physical division among them It is not possible to maximize the winding radius of the low frequency pattern 225 with respect to the area of the same soft substrate 210, and thus the wireless communication efficiency is not greatly improved.

2A is an exemplary diagram showing a planar arrangement structure of an NFC antenna and a WPT resonator in a resonance type wireless power receiving system to which a prior art document 2 (Laid-Open Patent Application No. 2013-0123310; resonance stage device in a resonance type wireless power receiving system) is applied. And FIG. 2B shows the arrangement structure of the NFC antenna and the WPT resonator on the portable terminal.

Referring to FIGS. 2A and 2B, the mechanical mounting of the NFC antenna 10 and the WPT resonator 20 in a wireless power receiving system, for example, a portable terminal, to which the prior art document 2 is applied will be described. Type antenna structure The NFC antenna 10 is installed so as to be located inside the WPT resonator 20 having the loop antenna structure.

The NFC antenna 10 may be installed on the back surface of the main body 1 of the portable terminal 1 (on the battery part that can be removably installed), and the WPT antenna 20 may be installed on the back cover 2 of the portable terminal. .

At this time, a properly designed isolation distance (Isolation d, Isolation h) is generated between the NFC antenna 10 and the WPT resonator 20 in order to secure the isolation characteristic. This isolation distance mechanically determines the isolation characteristics of the two frequencies (13.56 MHz, 6.78 MHz) of the NFC antenna 10 and the WPT resonator 20.

2C is a circuit diagram of a resonance stage device in a resonance type wireless power receiving system according to an embodiment of the prior art document 2, and 20 is a high impedance circuit.

Referring to FIG. 2C, the resonance stage device according to the feature of the prior art document 2 includes a WPT resonator (not shown) to prevent the harmonics emitted from the WPT power amplifier (PA) 20 may be connected to a shunt capacitor 40.

However, in the resonance-type wireless power receiving system according to the prior art document 2, the NFC antenna 10 and the WPT resonator 20 are separated from each other by only considering physical division among the NFC antenna 10 and the WPT resonator 20, The wireless communication efficiency can not be greatly improved.

Korean Patent Laid-Open Publication No. 2013-0113222 - Antenna and mobile terminal Korean Patent Laid-Open Publication No. 2013-0123310 - In a resonance type wireless power receiving system, Korean Patent Publication No. 10-2010-0074595 - Wireless charging system and method Korea registered patent No. 1063154 - Solid state charging device

An object of the present invention is to provide a flexible circuit board for wireless communication capable of extending the outer loop of the center loop pattern and connecting the middle loop pattern to the overlap pattern line to ensure wireless communication efficiency as well as center loop pattern and middle loop pattern. .

SUMMARY OF THE INVENTION It is an object of the present invention to enlarge the winding radius of the center loop pattern so as to reach the outer edge of the base film and to wind the center loop pattern on any one of the upper and lower regions of the central region, And an overlapped pattern line overlapping with the center loop pattern so as not to be connected to the center loop pattern.

It is an object of the present invention to provide a center loop pattern in which the center loop pattern is wound in a completely closed loop shape on the upper portion of the central region to complete the upper center loop pattern to ensure extension of the outer loop, And an upper middle loop pattern connected via a via hole to an overlap pattern line provided at a lower portion of the middle region so as not to be connected to the upper center loop pattern. Thus, the center loop pattern, A flexible printed circuit board for wireless communication is provided.

An object of the present invention is to provide a center loop pattern which is wound around a central region in a completely closed loop shape to complete an upper center loop pattern to ensure extension of the outer loop, And a lower middle loop pattern directly connected to an overlap pattern line provided at a lower portion of the region to ensure wireless communication efficiency up to the center loop pattern as well as the middle loop pattern.

According to an aspect of the present invention,

A flexible circuit substrate for wireless communication comprising a flexible base film having a central region, a middle region and an outer region, a center loop pattern provided in a central region of the base film, and a middle loop pattern provided in a middle region of the base film ,

Wherein the center loop pattern is wound on one of upper and lower portions of the central region,

The middle loop pattern is a basic feature of the present invention in that it has an overlap pattern line which is wound on one of upper and lower portions of the middle region and overlapped so as not to be connected to the center loop pattern.

The present invention has the effect of ensuring wireless communication efficiency up to the center loop pattern as well as the center loop pattern by connecting the middle loop pattern to the overlap pattern line while further extending the outer loop of the center loop pattern.

In the present invention, the winding radius of the center loop pattern is extended to reach the outer edge of the base film. To this end, the center loop pattern is wound on one of the upper and lower regions of the central region, So that the overlap pattern line overlapping with the center loop pattern is provided.

In the present invention, as the center loop pattern, the middle loop pattern is wound on the outer periphery of the upper center loop pattern instead of winding the upper center loop pattern in a complete closed loop shape to complete the upper center loop pattern, Loop pattern, that is, an upper middle loop pattern connected via a via hole to an overlap pattern line provided at a lower portion of the middle region so as not to be connected to the upper center loop pattern, thereby ensuring wireless communication efficiency up to the center loop pattern as well as the center loop pattern. .

In the present invention, as a center loop pattern, a middle loop pattern is wound on the lower portion of the middle region, instead of winding the upper center loop pattern in a completely closed loop shape to complete the upper center loop pattern, And a lower middle loop pattern directly connected to an overlap pattern line provided at a lower portion to ensure wireless communication efficiency up to the center loop pattern as well as the center loop pattern.

According to the present invention, the overlap pattern line is overlapped with a straight line so as not to be connected to the center loop pattern, thereby stabilizing the winding direction of the middle loop pattern and ensuring the wireless communication efficiency of the middle loop pattern.

According to the present invention, the overlap pattern line overlaps with the curved line so as not to be connected to the center loop pattern, thereby stabilizing the winding direction of the lower center loop pattern, thereby further ensuring the wireless communication efficiency of the center loop pattern.

The present invention has the effect of designing a first mode wireless communication, a second mode wireless communication, and a third mode wireless communication on a single flexible circuit board in a multi-pull manner.

The present invention has the effect of selectively utilizing a center loop pattern, a middle loop pattern, and an outer loop pattern as WPT, NFC, RFID, and MST.

1A is a block diagram of a mobile terminal related to the prior art document 1;
1B is a rear perspective view of a mobile terminal according to prior art document 1;
1C is a plan view showing that the antenna according to the prior art document 1 is attached to the back cover of the mobile terminal.
FIG. 2A is an exemplary view showing a planar arrangement structure of an NFC antenna and a WPT resonator in a resonance-type wireless power receiving system to which the prior art document 2 is applied; FIG.
2B is a structural view showing an arrangement structure of an NFC antenna and a WPT resonator of a prior art document 2 on a portable terminal.
2C is a circuit diagram of a resonance stage device in a resonance type wireless power receiving system according to an embodiment of the prior art document 2. FIG.
Figs. 3A and 3B are a front view and a back view of a flexible circuit board for wireless communication according to the first embodiment of the present invention; Fig.
4A and 4B are photographs showing a flexible printed circuit board for wireless communication according to a second embodiment of the present invention;
5A and 5B are photographs of a front surface and a back surface of a flexible circuit board for wireless communication according to a third embodiment of the present invention.
6A and 6B are photographs showing a flexible printed circuit board for wireless communication according to a fourth embodiment of the present invention.
7A and 7B are photographs showing a flexible printed circuit board for wireless communication according to a fifth embodiment of the present invention;
8A and 8B are photographs showing a flexible printed circuit board for wireless communication according to a sixth embodiment of the present invention;
9A and 9B are a front and back side view of a flexible circuit board for wireless communication according to a seventh embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a flexible circuit board for wireless communication according to the present invention will be described with reference to the drawings. There may be a plurality of embodiments thereof, and the objects, features and advantages I can understand it better.

Figs. 3A to 9B are photographs for the front and rear surfaces of the flexible circuit board for wireless communication according to the first to seventh embodiments of the present invention, wherein the numbers patterned in the center of the base film 10 are It is to be understood that the present invention is not limited to the description of the present invention.

The flexible circuit board for wireless communication according to the first to seventh embodiments of the present invention is a flexible circuit board having a central region 11, a middle region 12 and a flexible region 13 having outer regions 13 as shown in Figs. A center loop pattern 20 provided in the central region 11 of the base film 10 and a middle loop pattern 30 provided in the middle region 12 of the base film 10 do.

The center loop pattern 20 not specifically explained in the present invention is connected to the outer center start terminal S1 and the center end terminal E1 and the middle loop pattern 30 is also connected to the outer middle start terminal S2, End terminal E2, and these technical explanations are well known and will not be described in detail.

At this time, the center loop pattern 20 is wound on one of the upper and lower portions of the central region 11, the middle loop pattern 30 is wound on one of upper and lower regions of the middle region 12, And overlapping pattern lines 33 overlapping with each other so as not to be connected to each other.

In order to maximize the radio communication efficiency of the center loop pattern 20, the winding number and the winding radius of the base film 10 must be increased. In the present invention, The center loop pattern 20 is wound around any one of the upper and lower regions of the central region 11 and the middle loop pattern 30 is applied to the upper and lower portions of the middle region 12, And the overlapped pattern line 33 overlapped so as not to be connected to the center loop pattern 20 is provided so that the outer loop of the center loop pattern 20 is further expanded while the middle loop pattern 20 30 to the overlap pattern line 33 so as to ensure wireless communication efficiency up to the center loop pattern 20 as well as the middle loop pattern 30. [

As shown in FIGS. 3A, 3B, 4A, 4B, 6A, 6B, 7A, 7B, 9A and 9B, the center loop pattern 20 is formed by winding The middle loop pattern 30 is wound on the upper portion of the middle region 12 and the via hole V is formed in the overlap pattern line 33 provided in the lower portion of the middle region 12, And an upper middle loop pattern 31 connected to the upper middle loop pattern 31. [

The middle loop pattern 30 may be formed as a center loop pattern 20 by winding the upper center loop pattern 20 in a complete closed loop fashion to the upper center loop pattern 21 to ensure expansion of the outer loop, The via hole V is formed in the overlap pattern line 33 provided at the lower portion of the middle region 12 so as not to be connected to the center loop pattern 20, that is, the upper center loop pattern 21, The center loop pattern 20 and the middle loop pattern 30 as well as the wireless loop communication efficiency are ensured.

The center loop pattern 20 has the upper center loop pattern 21 wound on the upper portion of the central region 11 and the middle loop pattern 30 as shown in Figs. 5A, 5B, 8A and 8B. The lower middle loop pattern 32 may be wound on the lower portion of the middle region 12 and directly connected to the overlap pattern line 33 provided in the lower portion of the middle region 12. [

The middle loop pattern 30 is wound around the center region 11 in the form of a completely closed loop so as to be completed by the upper center loop pattern 21 to ensure the extension of the outer loop, And a lower middle loop pattern 32 that is wound on the lower portion of the region 12 and is directly connected to the overlap pattern line 33 provided in the lower portion of the middle region 12 to form the center loop pattern 20, (30).

As shown in FIGS. 3A, 3B, 6A, 6B, 8A and 8B, the center loop pattern 20 is wound on the lower portion of the central region 11 so as not to be connected to the overlap pattern line 33 And a lower center loop pattern 22 connected to the upper center loop pattern 21 through a via hole V. [

The upper center loop pattern 21 is extended as far as the center loop pattern 20 and at the same time the lower center loop pattern 22 is connected to the upper center loop pattern 21 via the via hole V, Ensure that the expansion of the number of times is guaranteed.

The overlap pattern line 33 overlaps the straight line 33a so as not to be connected to the center loop pattern 20 to stabilize the winding direction of the middle loop pattern 30 as shown in Figs. 3B, 6B, The overlapped pattern line 33 is overlapped by the curved line 33b so as not to be connected to the center loop pattern 20 so that the lower center loop 30 is overlapped with the center loop pattern 30, The winding direction of the pattern 22 is stabilized and the radio communication efficiency of the center loop pattern 20 is further ensured.

As shown in FIGS. 3A and 9B, the outer loop region 40 may further include an outer loop pattern 40 wound on one of upper and lower regions of the outer region 13. In this case, 1 mode wireless communication, the second mode wireless communication, and the third mode wireless communication can be designed to be multi-pulled.

The outer loop pattern 40, which is not specifically described in the present invention, is connected to the outer start terminal S3 and the outer end terminal E3 of the outside, and this technical description is also well known, and thus a detailed description thereof will be omitted.

At this time, the center loop pattern 20 is WPT (Wireless Power Transfer), the middle loop pattern 30 is NFC (Near Field Communication) or RFID (Radio Frequency Identification), and the outer loop pattern 40 is MST Transmission.

The center loop pattern 20 may be WPT, the middle loop pattern 30 may be MST, and the outer loop pattern 40 may be NFC or RFID.

In addition, the center loop pattern 20 may be NFC or RFID, the middle loop pattern 30 may be WPT, and the outer loop pattern 40 may be MST.

Further, the center loop pattern 20 may be MST, the middle loop pattern 30 may be WPT, and the outer loop pattern 40 may be NFC or RFID.

At this time, the center loop pattern 20, the middle loop pattern 30 and the outer loop pattern 40 realize wireless communication through Non-Contact Magnetic Inductive Coupling Power (WPT) (NFC) or Radio Frequency Identification (RFID) is used to charge a battery in a frequency band of 100 to 200 kHz by forming a magnetic field by flowing a current according to an electromagnetic induction principle, Contact Magnetic Inductive Coupling Power in a frequency band of 13.56 MHz at a distance of approximately 10 to 40 cm, and MST (Magnetic Secure Transmission) A known technique for transmitting mutual external terminal data by a non-contact magnetic inductive coupling force in a frequency band of 13.56 MHz at a short distance, FIG.

The present invention can be used in a portable terminal industry field such as a tablet PC and a smart phone.

10: base film 11: central region
12: Middle area 13: Outer area
20: center loop pattern 21: upper center loop pattern
22: Lower center loop pattern 30: Middle loop pattern
31: upper middle loop pattern 32: lower middle loop pattern
33: overlap pattern line 33a: straight line
33b: Curved line 40: Outer loop pattern
V: via hole S1: center start terminal
E1: Center-end terminal S2: Middle-start terminal
E2: Middle end terminal S3: Outer start terminal
E3: Outer end terminal

Claims (12)

delete A flexible base film 10 having a central region 11, a middle region 12 and an outer region 13; a center loop pattern 20 provided in a central region 11 of the base film 10; And a middle loop pattern (30) provided in a middle region (12) of the base film (10), the flexible circuit board
The center loop pattern 20 is wound on one of upper and lower portions of the central region 11,
The middle loop pattern 30 includes an overlap pattern line 33 which is wound on one of the upper and lower portions of the middle region 12 and is overlapped so as not to be connected to the center loop pattern 20,
The center loop pattern 20 has an upper center loop pattern 21 wound on an upper portion of the central region 11,
The middle loop pattern 30 is wound on the upper portion of the middle region 12 and is connected to the overlap pattern line 33 via the via hole V, (31) formed on the flexible circuit board. A flexible base film 10 having a central region 11, a middle region 12 and an outer region 13; a center loop pattern 20 provided in a central region 11 of the base film 10; And a middle loop pattern (30) provided in a middle region (12) of the base film (10), the flexible circuit board
The center loop pattern 20 is wound on one of upper and lower portions of the central region 11,
The middle loop pattern 30 includes an overlap pattern line 33 which is wound on one of the upper and lower portions of the middle region 12 and is overlapped so as not to be connected to the center loop pattern 20,
The center loop pattern 20 has an upper center loop pattern 21 wound on an upper portion of the central region 11,
The middle loop pattern 30 is wound on the lower portion of the middle region 12 and has a lower middle loop pattern 32 directly connected to the overlap pattern line 33 provided below the middle region 12 Wherein the flexible printed circuit board is a flexible circuit board for wireless communication. 3. The method of claim 2,
The center loop pattern 20 is wound on a lower portion of the central region 11 so as not to be connected to the overlap pattern line 33 and is connected to the lower center loop pattern 21 via a via hole V, And a loop pattern (22). 5. The method of claim 4,
Wherein the overlap pattern line (33) overlaps the straight line (33a) so as not to be connected to the center loop pattern (20). 5. The method of claim 4,
Wherein the overlap pattern line (33) overlaps the curved line (33b) so as not to be connected to the center loop pattern (20). 7. The method according to any one of claims 2 to 6,
Further comprising an outer loop pattern (40) wound on one of upper and lower portions of the outer region (13). 8. The method of claim 7,
The center loop pattern 20 is WPT,
The middle loop pattern 30 is NFC or RFID,
Wherein the outer loop pattern (40) is an MST. 8. The method of claim 7,
The center loop pattern 20 is WPT,
The middle loop pattern 30 is MST,
Wherein the outer loop pattern (40) is NFC or RFID. 8. The method of claim 7,
The center loop pattern 20 is NFC or RFID,
The middle loop pattern 30 is WPT,
Wherein the outer loop pattern (40) is an MST. 8. The method of claim 7,
The center loop pattern 20 is MST,
The middle loop pattern 30 is WPT,
Wherein the outer loop pattern (40) is NFC or RFID. 7. The method according to any one of claims 2 to 6,
Wherein the center loop pattern (20), the middle loop pattern (30), and the outer loop pattern (40) realize wireless communication through non-contact magnetic induction coupling.

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