Wireless power module for noise improvement and electronic device including the same

Abstract

One embodiment of the present disclosure is a wireless power module that includes a coil layer including a coil having a curved region, a wiring board disposed on the coil layer, and a plurality of conductive wires formed on the wiring board, at least some of the plurality of conductive wires intersecting with the curved region within a predetermined angle range in a planar view.

Description

Technical Field

[0001] The present disclosure relates to a wireless power module for noise improvement and an electronic device including the same.

Background Art

[0002] The radio wave standards of electronic devices for wireless charging are divided into those of manufacturers and national standards, and EMC (electromagnetic compatibility) measurements are performed under different conditions. Wireless chargers need to make efforts to solve the problem of high noise generated at specific frequencies according to the standards, which has led to an increase in noise components and changes in the PCB (printed circuit board) structure. However, there is a fundamental problem that the influence of noise generated between wireless charging coils is significant.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Various examples of the present disclosure are for providing a wireless power module with improved noise and an electronic device including the same.

[0004] The technical problems to be achieved in various examples of the present disclosure are not limited to the matters mentioned above, and other technical problems not mentioned can be considered by those with ordinary knowledge in the technical field from various examples of the present disclosure described below.

Means for Solving the Problems

[0005] As an embodiment of the present disclosure, a wireless power module includes a coil layer including a coil having a bent region, a wiring board disposed on the coil layer, and a plurality of conductive wirings formed on the wiring board, and at least a part of the plurality of conductive wirings intersects with the bent region within a predetermined angular range in a plan view. For example, the predetermined angular range can include 90°. For example, the predetermined angular range can include a maximum value obtained by adding a preset value based on 90° and a minimum value obtained by subtracting the preset value. For example, the preset value can be 5°. For example, the plurality of conductive wirings can include an outer loop wiring formed on the wiring substrate.

[0006] For example, the plurality of conductive wirings include an inner loop wiring formed on the wiring substrate and spaced apart from the outer loop wiring, a first branch wiring having one end connected to the outer loop wiring and the other end Open being, and a second branch wiring having one end connected to the inner loop wiring and the other end Open being. For example, the first branch wiring and the second branch wiring can intersect within the predetermined angular range in a plan view with the bent region. For example, the first branch wiring and the second branch wiring can be alternately branched from the outer loop and the inner loop wirings.

[0007] For example, the plurality of conductive wirings include a base branch wiring branched inward of the wiring substrate by the outer loop wiring, a first branch wiring having one end connected to the outer loop wiring and the other end Open being, and a second branch wiring having one end connected to the base branch wiring and the other end Open being, and the first branch wiring and the second branch wiring can intersect within the predetermined angular range in a plan view with the bent region.

[0008] For example, the plurality of conductive wirings further include an inner loop wiring formed on the wiring substrate and spaced apart from the outer loop wiring, and a connection wiring branched inward of the wiring substrate by the outer loop wiring and branched so as to protrude a predetermined length from the inner loop wiring, and the connection wiring can connect the outer loop wiring and the inner loop wiring.

[0009] For example, one end of the plurality of conductive wirings is connected to the outer loop wiring and the other endOpen a first branched wiring to be formed, and one end of which is connected to the inner loop wiring and the other end of which is Open further includes a second branched wiring to be formed, and the first branched wiring and the second branched wiring can intersect within the predetermined angular range in a plan view with respect to the bent region.

[0010] For example, the plurality of conductive wirings include a plurality of inner base annular wirings formed on the wiring substrate and separated from the outer loop wiring, a connection wiring branched from the outer loop wiring toward the inside of the wiring substrate and branched so as to protrude by a predetermined length from the plurality of inner base annular wirings, and a base branch wiring branched from the outer loop wiring and branched so as to pass between the plurality of inner base annular wirings, and the connection wiring can connect the outer loop wiring and the plurality of inner base annular wirings.

[0011] For example, one end of the plurality of conductive wirings is connected to the outer loop wiring and the other end of which is Open a first branched wiring to be formed, and one end of which is connected to any one of the plurality of inner base annular wirings and the other end of which is Open further includes a second branched wiring to be formed, and the first branched wiring and the second branched wiring can intersect within the predetermined angular range in a plan view with respect to the bent region.

[0012] As another embodiment of the present disclosure, an electronic device includes a main body, a cover arranged to correspond to the main body, and a wireless power module provided between the main body and the cover, the wireless power module includes a coil layer including a coil electrically connected to the main body and having a bent region, a wiring substrate arranged on the coil layer, and a plurality of conductive wirings formed on the substrate, and at least a part of the plurality of conductive wirings intersects within a predetermined angular range in a plan view with respect to the bent region.

[0013] The various examples of the present disclosure described above are only part of the preferred examples of the present disclosure, and various examples reflecting the technical features of the various examples of the present disclosure can be derived and understood by those having ordinary knowledge in the art based on the following detailed description.

Advantages of the Invention

[0014] According to various examples of the present disclosure, there are the following effects. According to various examples of the present disclosure, a wireless power module with improved noise and an electronic device including the same can be provided. In addition, heat generated by wireless power transmission and reception can be reduced. In addition, an electronic device in which a coil layer and a conductive layer are integrally laminated on a substrate can be provided. In addition, a ferrite wall structure can be adopted to improve noise.

[0015] The effects obtainable from the various examples of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those having ordinary knowledge in the art based on the following detailed description.

Brief Description of the Drawings

[0016] The drawings attached below are for helping the understanding of the various examples of the present disclosure, and provide the various examples of the present disclosure together with the detailed description. However, the technical features of the various examples of the present disclosure are not limited to specific drawings, and the features disclosed in each drawing can be combined with each other to form a new embodiment. The reference numerals in each drawing mean structural elements.

Figure 1

Figure 2a

Figure 2b

Figure 2c

Figure 2d

Figure 2e

Figure 2f

Figure 3a

Figure 3b

Figure 3c

Figure 3d

Figure 3e

Figure 3f

Figure 4

Figure 5a

Figure 5b

Figure 5c

Figure 5d

Figure 6

Figure 7a

Figure 7b

Figure 7c

Figure 8a

Figure 8b

Figure 9a

Figure 9b

Figure 10

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below together with the accompanying drawings is intended to explain exemplary embodiments of the present invention, and is not intended to show the only embodiment shape in which the present invention can be implemented. The following detailed description includes specific details in order to provide a complete understanding of the present invention. However, those skilled in the art should understand that the present disclosure can be implemented without such specific details.

[0018] In some cases, to avoid ambiguity in the concepts of the present disclosure, known structures and devices may be omitted, or may be illustrated in the form of a block diagram centered on the core functions of each structure and device. Also, the same reference numerals are used throughout the present disclosure to describe the same components.

[0019] Various examples according to the concept of the present invention can be modified in various ways and have various forms. Therefore, various examples are illustrated in the drawings and will be described in detail in the present disclosure. However, this is not intended to limit various examples according to the concept of the present invention to a specific disclosed form, and includes modifications, equivalents, or alternatives included in the spirit and technical scope of the present invention.

[0020] The terms such as first or second can be used to describe various components, but the components should not be limited by the terms. The terms only distinguish one component from another. For example, without departing from the scope of the rights according to the concept of the present invention, the first component can be referred to as the second component, and similarly the second component can be referred to as the first component.

[0021] When it is mentioned that a certain component is "connected to" or "connected with" another component, it should be understood that it is directly connected to or connected with the other component, but there may be other components in the middle. On the contrary, when it is mentioned that a certain component is "directly connected to" or "directly connected with" another component, it should be understood that there is no other component in the middle. Expressions for explaining the relationship between components, such as "between", "immediately between", or "directly adjacent to", etc. should also be analyzed in the same way.

[0022] In various examples of the present disclosure, " / " and "," should be interpreted as indicating "and / or". For example, "A / B" can mean "A and / or B". Further, "A, B" can mean "A and / or B". Further, "A / B / C" can mean "at least any one of A, B, and / or C". Further, "A / B / C" can mean "at least any one of A, B, and / or C".

[0023] In various examples of the present disclosure, "or" must be construed to mean "and / or". For example, "A or B" can include "only A", "only B", and / or "all of A and B". In other words, "or" must be construed to mean "additionally or alternatively".

[0024] The terms used in the present disclosure are merely used to explain various specific examples and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present disclosure, terms such as "including" or "having" are intended to specify the existence of the described features, numbers, steps, operations, components, parts, or combinations thereof, and it should be understood that the existence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

[0025] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention pertains. Terms that are defined the same as in a commonly used dictionary should be construed to have a meaning consistent with the meaning in the context of the related art, and should not be construed in an ideal or overly formal sense unless clearly defined in the present application. Hereinafter, various examples of the present disclosure will be described in detail with reference to the accompanying drawings. Wireless power module FIG. 1 shows a wireless power module according to an example of the present disclosure.

[0026] Referring to FIG. 1, a wireless power module 10 according to an example of the present disclosure is included in a wireless power transmitter or a wireless power receiver for wireless power transmission and reception, and includes a coil layer for wireless power transmission and reception and a conductive layer for noise filtering of wireless power signals.

[0027] The coil layer includes ferrite 11 and a coil 12 formed on the ferrite 11. The coil 12 can be formed in various patterns on the ferrite 11 for wireless power transmission and reception, and may be a coil wound a various number of times according to the design.

[0028] The conductive layer is disposed on the coil layer. The conductive layer includes a wiring substrate 21 and a plurality of conductive wirings 22 formed on the wiring substrate 21. In the present disclosure, the conductive wiring 22 can be a concept corresponding to a transmission line.

[0029] The above-described ferrite 11 can be formed of various materials having a magnetic flux density and a magnetic permeability, such as MnZn, NiZn, permalloy, Si-Fe, sendust, amorphous solid, nanocrystalline material, etc.

[0030] The wiring substrate 21 can be a printed circuit board (PCB), a flexible printed circuit board (FPCB), a ceramic substrate, a pre-molded substrate, a DBC (direct bonded copper) substrate, or various substrates such as an insulated metal substrate (IMS). Alternatively, the ferrite 11 and the wiring substrate 21 may be made of a material containing an epoxy resin (for example, FR-3, FR-4, etc.).

[0031] The plurality of conductive wirings 22 can be coupled to each other. OpenConductive wirings 22 whose positions to be arranged are different from each other can be arranged alternately. By arranging a plurality of conductive wirings 22 alternately and coupling them to each other, the conductive layer can function as a resonator that filters a specific frequency band of a wireless power signal, that is, a filter. In particular, the plurality of conductive wirings 22 can be designed to filter noise of the wireless power signal. Hereinafter, a conductive layer according to various examples of the present disclosure will be described. FIGS. 2A to 2F are plan views of a conductive layer according to various examples of the present disclosure.

[0032] Referring to FIGS. 2A to 2E, a plurality of conductive wirings 22 included in a conductive layer according to various examples of the present disclosure are formed on a wiring substrate 21, and at least a part of the plurality of conductive wirings 22 can be formed so as to intersect with a bent region of a coil layer within a predetermined angular range in a plan view. By at least a part of the plurality of conductive wirings 22 intersecting with the bent region of the coil layer within a predetermined angular range in a plan view, the noise filtering effect of the wireless power signal can be more improved than by being perpendicular or horizontally orthogonal only in the remaining region excluding the bent region of the coil layer, that is, the linear region.

[0033] The predetermined angular range in which the conductive wiring 22 intersects with the bent region of the coil layer can include 90°. Therefore, the conductive wiring 22 can be formed so as to be orthogonal or quasi-orthogonal to the bent region of the coil layer.

[0034] For example, the predetermined angular range can include a maximum value obtained by adding a preset value to 90° and a minimum value obtained by subtracting the preset value. Here, the preset value can be, for example, 5°. When the preset value is 5°, that is, the predetermined angular range is 85° to 95°, the noise filtering effect can be maximized.

[0035] Alternatively, the preset value can be, for example, 45°. When the preset value is 45°, that is, when the predetermined angular range is 45° to 135°, the pattern of the conductive wiring 22 can be designed in a more diverse manner. At least a part of the conductive wiring 22 can be provided in various forms so as to intersect with the bent region of the coil layer within a predetermined angular range.

[0036] For example, as shown in FIGS. 2A to 2E, the plurality of conductive wirings 22 can include an outer loop wiring and a plurality of branch wirings formed on the wiring substrate 21. The outer loop wiring may have a shape in which a part has a bent region and the rest has a straight region, or may be circular, or may have various other shapes. One end of the plurality of branch wirings Open The first branch wiring and the second branch wiring include positions where they are connected to different positions from each other. A plurality of the first branch wiring and the second branch wiring can be provided respectively, and the first branch wiring and the second branch wiring are arranged alternately with each other. Hereinafter, the specific forms of each conductive wiring 22 in FIGS. 2A to 2E will be described in more detail.

[0037] Hereinafter, the first branch wiring and the second branch wiring are used as a comprehensive concept for all forms of branch wirings in which one end Open is connected to different positions from each other and are arranged alternately. Also, the base branch wiring is branched from the outer loop wiring, and all forms of base branch wirings having autonomous branch wirings can be used as a comprehensive concept.

[0038] In the case of FIG. 2A, the plurality of conductive wirings 22 include an inner loop wiring 24 formed on the wiring substrate 21 separated from the outer loop wiring 23 in addition to the outer loop wiring 23. The outer loop wiring 23 and the inner loop wiring 24 are formed separately and are not physically connected. Also, the outer loop wiring 23 and the inner loop wiring 24 can be closed loops.

[0039] One end of the plurality of branch wirings is connected to the outer loop wiring 23, and the other end Open The first branch wiring 25a to which is connected and one end is connected to the inner loop wiring 24, and the other endOpen including a second branch wiring 25b to be formed. The first branch wiring 25a and the second branch wiring 25b are alternately branched from the outer loop wiring 23 and the inner loop wiring 24 along the first axis A or the second axis B.

[0040] Among the plurality of branch wirings, particularly the first branch wiring 25a and the second branch wiring 25b intersect within a predetermined angular range in a plan view with the bent region of the coil layer. Therefore, even in the bent region, the conductive wiring 22 and the coil layer can be orthogonal or quasi-orthogonal, so that the noise filtering effect of the wireless power signal can be further improved.

[0041] One end of the plurality of branch wirings is connected to the outer loop wiring 23, and the other end is Open connected to a third branch wiring 26a to be formed, and one end is connected to the inner loop wiring 24, and the other end is Open including a fourth branch wiring 26b to be formed. The third branch wiring 26a and the fourth branch wiring 26b are alternately branched from the outer loop wiring 23 and the inner loop wiring 24 along the X axis or the Y axis. The third branch wiring 26a and the fourth branch wiring 26b can be orthogonal to the linear region of the coil layer in a plan view.

[0042] Next, in the case of FIG. 2B, the plurality of branch wirings include a base branch wiring 27 branched toward the inside of the wiring substrate 21 by the outer loop wiring 23. The base branch wiring 27 is branched along the X axis or the Y axis, and a plurality of them can be provided.

[0043] One end of the plurality of branch wirings is connected to the outer loop wiring 23, and the other end is Open connected to a first branch wiring 28a to be formed, and one end is connected to the base branch wiring 27, and the other end is Open including a second branch wiring 28b to be formed. The first branch wiring 28a and the second branch wiring 28b are alternately branched from the outer loop wiring 23 and the base branch wiring 27 along the first axis A or the second axis B.

[0044] Among the plurality of branch wirings, in particular, the first branch wiring 28a and the second branch wiring 28b intersect within a predetermined angular range in a plan view with the bent region of the coil layer. Therefore, even in the bent region, the conductive wiring 22 and the coil layer can be orthogonal or quasi-orthogonal, so that the noise filtering effect of the wireless power signal can be further improved.

[0045] One end of the plurality of branch wirings is connected to the base branch wiring 27, and the other end is Open the third branch wiring 29a to be formed and one end is connected to the base branch wiring 27, and the other end is Open the fourth branch wiring 29b to be formed. The third branch wiring 29a and the fourth branch wiring 29b are alternately branched from the base branch wiring 27 along the X-axis or the Y-axis. The third branch wiring 29a and the fourth branch wiring 29b can be orthogonal to the straight region of the coil layer in a plan view.

[0046] In addition, the plurality of branch wirings can include sub-base branch wirings 30 that branch toward the inside of the wiring substrate 21 by the outer loop wiring 23 and branch along the first direction A or the second direction B. A plurality of sub-base branch wirings 30 can be provided.

[0047] One end of the plurality of branch wirings is connected to the outer loop wiring 23, and the other end is Open the fifth branch wiring 31a to be formed and one end is connected to the sub-base branch wiring 30, and the other end is Open the sixth branch wiring 31b to be formed. The fifth branch wiring 31a and the sixth branch wiring 31b are alternately branched from the outer loop wiring 23 and the sub-base branch wiring 30 along the X-axis or the Y-axis and can have different lengths from each other. For example, the branch wirings alternately branched along the X-axis among the fifth branch wiring 31a and the sixth branch wiring 31b can be formed so that the lengths sequentially increase. For example, the branch wirings alternately branched along the Y-axis among the fifth branch wiring 31a and the sixth branch wiring 31b can be formed so that the lengths sequentially increase.

[0048] Next, in the case of FIG. 2C, in addition to the outer loop wiring 23, a plurality of conductive wirings 22 include an inner loop wiring 24 formed on the wiring substrate 21 separately from the outer loop wiring 23 and a connection wiring 32 branched toward the inside of the wiring substrate 21 by the outer loop wiring 23 and branched so as to protrude by a predetermined length from the inner loop wiring 24. The outer loop wiring 23 and the inner loop wiring 24 can be closed loops. The connection wiring 32 physically connects the outer loop wiring 23 and the inner loop wiring 24, is branched along the X-axis or the Y-axis, and a plurality of them can be provided.

[0049] One end of a plurality of branch wirings is connected to the outer loop wiring 23, and the other end is Open connected to form a first branch wiring 33a, and one end is connected to the inner loop wiring 24, and the other end is Open connected to form a second branch wiring 33b. The first branch wiring 33a and the second branch wiring 33b are alternately branched from the outer loop wiring 23 and the inner loop wiring 24 at predetermined angles.

[0050] Among the plurality of branch wirings, particularly the first branch wiring 33a and the second branch wiring 33b intersect within a predetermined angular range in a plan view with all the bent regions when the coil layer is circular. Therefore, even in the bent region, the conductive wiring 22 and the coil layer can be orthogonal or quasi-orthogonal, so that the noise filtering effect of the wireless power signal can be further improved. The connection wiring 32 includes a protruding section from the inner loop wiring 24. The protruding section includes a first protruding section corresponding to the X-axis direction and a second protruding section corresponding to the Y-axis direction.

[0051] One end of a plurality of branch wirings is connected to the first protruding section, and the other end is Open connected to form a first annular wiring 34a, and one end is connected to the second protruding section, and the other end is Open connected to form a second annular wiring 34b. A plurality of the first annular wirings 34a can be provided and can be branched from the first protruding section in the third direction (clockwise) or the fourth direction (counterclockwise). A plurality of the second annular wirings 34b can be provided and can be branched from the second protruding section in the third direction (clockwise) or the fourth direction (counterclockwise). The first annular wiring 34a and the second annular wiring 34b can be arranged alternately.

[0052] Next, in the case of FIG. 2D, the plurality of conductive wirings 22 include a plurality of inner base annular wirings 35 formed on the wiring substrate 21 separated from the outer loop wiring 23 in addition to the outer loop wiring 23, connection wirings 36 branched from the outer loop wiring 23 toward the inside of the wiring substrate 21 and branched so as to protrude from the inner base annular wiring 35 by a predetermined length, and base branch wirings 37 branched from the outer loop wiring 23 and branched so as to pass between the plurality of inner base annular wirings 35. A plurality of inner base annular wirings 35 can be provided and can be provided separately from each other.

[0053] One end of the plurality of branch wirings is connected to the outer loop wiring 23, and the other end is Open the first branch wiring 38a that is, and one end is connected to any one of the plurality of inner base annular wirings 35, and the other end is Open the second branch wiring 38b that is. The first branch wiring 38a and the second branch wiring 38b are alternately branched from the outer loop wiring 23 and the plurality of inner base annular wirings 35 at predetermined angles. In particular, the first branch wiring 38a and the second branch wiring 38b can be grouped into group branch wirings 38c at predetermined intervals along the outer loop wiring 23. The group branch wiring 38c can include a plurality of first branch wirings 38a and second branch wirings 38b that are alternately arranged, and a plurality of them can be provided. Each of the plurality of group branch wirings 38c is separated at predetermined intervals along the outer loop wiring 23.

[0054] Among the plurality of branch wirings, in particular, when the coil layer is circular, the first branch wiring 38a and the second branch wiring 38b intersect within a predetermined angular range in a plan view with all the bent regions. Therefore, even in the bent region, the conductive wiring 22 and the coil layer can be orthogonal or quasi-orthogonal, so that the noise filtering effect of the wireless power signal can be further improved. The connection wiring 36 includes a protruding section protruding from the inner base annular wiring 35. The protruding section includes a first protruding section corresponding to the first direction A.

[0055] One end of a plurality of branch wirings is connected to the first protruding section, and the other end is Open connected to the first annular wiring 39a, and one end is connected to the base branch wiring 37, and the other end is Open connected to the second annular wiring 39b. A plurality of the first annular wirings 39a can be provided, and can be branched from the first protruding section in the third direction (clockwise) or the fourth direction (counterclockwise). A plurality of the second annular wirings 39b can be provided, and can be branched from the second protruding section in the third direction (clockwise) or the fourth direction (counterclockwise). The first annular wiring 39a and the second annular wiring 39b can be arranged alternately.

[0056] Next, in the case of FIG. 2E, in addition to FIG. 2D, a sub-base branch wiring 40 branched from the outer loop wiring 23 in a region corresponding to between the group branch wirings 38c, and a third branch wiring 41a and a fourth branch wiring 41b branched from the sub-base branch wiring 40 in the third direction (clockwise) or the fourth direction (counterclockwise) are additionally included. A plurality of the third branch wirings 41a and the fourth branch wirings 41b are provided and are arranged alternately. Different from FIGS. 2A to 2E described above, the plurality of conductive wirings 22 included in the conductive layer may be formed in a form corresponding to the form of the coil 12 as shown in FIG. 2F.

[0057] For example, the plurality of conductive wirings 22 include an outer loop wiring 23 formed on the wiring substrate 21, a base branch wiring 42 branched from the outer loop wiring 23 along the first direction A or the second direction B, and a plurality of branch wirings 43 branched from the base branch wiring 42.

[0058] One end of a plurality of branch wirings 43 is connected to any one of the plurality of base branch wirings 42, and the other end is Open connected. The plurality of branch wirings 43 can be formed such that their lengths become shorter as they go inward.

[0059] In FIG. 2F, some of the plurality of branch wirings 43 are illustrated as including a straight section and a bent section extending from the straight section, but according to various examples, the plurality of branch wirings 43 may be formed to have only a straight section. Or, the plurality of branch wirings 43 can be formed to have only a bent section without a straight section. According to an embodiment, the size of the region where no branch wiring is formed within the region of the outer loop wiring 23 on the substrate may be adjusted as in FIG. 2F.

[0060] FIGS. 3A to 3F are plan views of wireless power modules according to various examples of the present disclosure. Hereinafter, detailed descriptions of portions overlapping with the portions described above will be omitted.

[0061] Referring to FIGS. 3A to 3F, the conductive layer included in the wireless power module 10 can include electrodes 50 that are electrically connected to the conductive wirings 22 according to the various examples described above. A plurality of electrodes 50 can be provided and can be respectively arranged in the corner regions of the wiring substrate 21. The electrodes 50 can have various sizes and shapes. The electrode 50 can be connected to any one of the plurality of base branch wirings 51 as in FIGS. 3A to 3D. Or, the electrode 50 can be connected to the outer loop wiring 52 as in FIGS. 3E to 3F. The wireless power module 10 according to the various examples of the present disclosure described above can further include a ground layer.

[0062] The ground layer can correspond to the wiring substrate 21 described above, or can be provided between the wiring substrate 21 and the plurality of conductive wirings 22, or can be provided on one side of the wiring substrate 21. The ground layer can be provided in the corner regions of the wiring substrate 21.

[0063] The ground layer is connected to a plurality of conductive patterns to block noise generated in a specific band and can reduce the size of the noise. In addition, the ground layer can disperse heat generated during wireless power transmission and reception to the ground layer. The wireless power module 10 according to various examples of the present disclosure described above can further include a radiator (not shown).

[0064] The radiator (not shown) can include various means for reducing the temperature of the coil layer and / or the conductive layer when heat is generated by wireless power transmission and reception, and can be provided on the ferrite 11 and / or the wiring board 21.

[0065] With the above-described ground layer and radiator (not shown), problems of compatibility certification and user safety caused by heat generated in the wireless power module 10 can be solved. The wireless power module 10 according to various examples of the present disclosure described above can be provided integrally. FIG. 4 shows an integrated wireless power module according to an example of the present disclosure.

[0066] Referring to FIG. 4, the coil layer and the conductive layer included in the wireless power module 10 can be provided integrally. For example, in the integrated wireless power module, the coil layer includes a coil substrate 11_1 and a coil 12 of the PCB series. The coil 12 is formed on the coil substrate 11_1, the wiring board 21 is provided on the coil 12, and the conductive layer is formed on the wiring board 21, so that the coil layer and the conductive layer can be integrally laminated. Here, the coil substrate 11_1 and the wiring board 21 can be a PCB, an FPCB, an FR-3, an FR-4, or the like. FIGS. 5A to 5D show the noise waveforms of the wireless power signal for each filter.

[0067] Here, FIG. 5A shows the noise waveform without a filter, FIGS. 5B to 5C show the noise waveforms of filters that are not orthogonal or quasi-orthogonal to the bent region of coil 12, and FIG. 5D shows the noise waveform for the wireless power module 10 according to an example of the present disclosure. Referring to FIG. 5A, without a filter, noise is not blocked in all bands below 2 MHz with reference to the reference line (red line). Referring to FIGS. 5B to 5C, in the case of an existing filter, noise is not blocked in some bands.

[0068] Referring to FIG. 5D, in the case of the wireless power module 10 according to an example of the present disclosure, by providing a conductive layer that is orthogonal or quasi-orthogonal to the bent region of coil 12, noise can be effectively blocked in all bands.

[0069] The wireless power module 10 according to various examples of the present disclosure described above can apply a ferrite wall structure in order to further reduce the noise that can occur between coils during wireless power transmission and reception at high power.

[0070] FIG. 6 shows a wireless power module to which a ferrite wall structure according to an example of the present disclosure is applied, and FIGS. 7A to 7C show ferrite walls according to various examples of the present disclosure.

[0071] Referring to FIG. 6, the wireless power module 10 to which a ferrite wall structure according to an example of the present disclosure is applied includes a ferrite plate 61, a coil 12, a ferrite wall 62, and conductive layers 21 and 22.

[0072] The ferrite plate 61 and the ferrite wall 62 can be formed of a ferrite material. Here, the ferrite plate 61 can correspond to the ferrite 11 described above.

[0073] A coil 12 and a ferrite wall 62 are arranged on a ferrite plate 61. The coil 12 can be wound around the ferrite plate 61. The ferrite wall 62 can have a form that can surround the coil 12 in a plan view. That is, in a plan view, the ferrite wall 62 is provided between the ferrite plate 61 and the coil 12. Conductive layers 21 and 22 are arranged on the coil 12.

[0074] Referring to FIGS. 7A to 7C, the ferrite wall 62 can include various shapes for noise shielding. For example, the ferrite wall 62 can have a shape corresponding to the coil layer as shown in FIGS. 7A and 7B, and can have a form that can surround the coil 12. At this time, a part of one side of the ferrite wall 62 may be opened so that two terminals of the coil 12 can pass through as shown in FIG. 7B. A plurality of ferrite walls 62 can be provided, and when a plurality are provided, they may be laminated along the thickness of the coil 12.

[0075] For example, the ferrite wall 62 may have the shape of a ferrite sheet having a predetermined height and width as shown in FIG. 7C. At this time, the predetermined height and width can have a size sufficient to surround the coil 12. When the ferrite wall 62 has the shape of a ferrite sheet, an insertion hole may be formed on one surface of the ferrite wall 62 so that two terminals of the coil 12 can pass through. FIGS. 8A and 8B show noise waveforms according to the availability of the ferrite wall structure.

[0076] Referring to FIGS. 8A and 8B, in the case of the wireless power module 10 without a filter, noise is generated in a specific band, but in the case of the wireless power module 10 to which the ferrite wall structure is applied, the noise generated in the frequency band of FIG. 8A can be effectively blocked.

[0077] The wireless power module 10 according to various examples of the present disclosure described above can additionally include NFC (near field communication) wiring. Figures 9A and 9B are plan views of a wireless power module including NFC wiring according to an example of the present disclosure.

[0078] Referring to FIGS. 9A and 9B, a wireless power module 10 including NFC wiring 70 according to an example of the present disclosure can additionally include NFC wiring 70 disposed on a substrate. The NFC wiring 70 can be disposed together with conductive wiring 22 on a wiring substrate 21, and one end of the NFC wiring 70 can be connected to an input / output terminal. The NFC wiring 70 can have various shapes.

[0079] As an example, the NFC wiring 70 can be wound to have a plurality of loop shapes as shown in FIG. 9A. Also, the NFC wiring 70 can be disposed so as to overlap with the conductive wiring 22 in a partial region, and the conductive wiring 22 can be disposed at the upper end in the overlapping portion.

[0080] As an example, the NFC wiring 70 can be formed to have a pattern such as the conductive wiring 22 according to various examples of the present disclosure as shown in FIG. 9B. For example, the NFC wiring 70 can include an outer loop wiring, a base branch wiring branched from the outer loop wiring, and a first branch wiring and a second branch wiring branched from the outer loop wiring and the base branch wiring. The other ends of the first branch wiring and the second branch wiring can be Open configured and can be arranged alternately. Also, the NFC wiring 70 can be disposed so as to overlap with the conductive wiring 22 in a partial region, and the conductive wiring 22 can be disposed at the upper end in the overlapping portion. Electronic device FIG. 10 shows an electronic device including a wireless power module according to an example of the present disclosure. Referring to FIG. 10, the electronic device includes a main body 1, a wireless power module 10, and a cover 2. The electronic device can be, for example, a portable terminal. The wireless power module 10 includes the wireless power module 10 according to various examples of the present disclosure described above.

[0081] The wireless power module 10 is provided between the main body 1 and the cover 2. The coil layers 11_1 and 12 included in the wireless power module 10 are electrically connected to the main body 1, and supply wireless power to a wireless power receiver coupled to the wireless power module 10. At this time, the conductive layers 21 and 22 included in the wireless power module 10 serve to block noise of the wireless power signal. Also, a shielding sheet 3 may be included between the coil layers 11_1 and 12 and the main body 1 if necessary.

[0082] Since an example of the proposed method in the above description can also be included as one of the implementation methods of the present disclosure, it is obvious that it can be regarded as a kind of proposed method. Also, the proposed method described above can be implemented independently, but can also be implemented in a combined (or merged) form of some proposed methods.

[0083] The examples of the present disclosure disclosed as above are provided so that ordinary technicians in the technical field related to the present disclosure can implement and practice the present disclosure. Although the examples of the present disclosure have been described above with reference to the examples, ordinary technicians in the relevant technical field can make various modifications and changes to the examples of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples described herein, but is intended to give the broadest scope consistent with the principles and novel features disclosed herein.

Description of Reference Numerals

[0084] 1 Main body 2 Cover 3 Shielding sheet 10 Wireless power module 11 Ferrite 12 Coil 21 Wiring board 22 Conductive wiring 23 Outer loop wiring 24 Inner loop wiring 25a First branch wiring 25b Second branch wiring 26a Third branch wiring 26b Fourth branch wiring 27 Base branch wiring 28a First branch wiring 28b Second branch wiring 29a Third branch wiring 29b Fourth branch wiring 30 Sub - base branch wiring 31a Fifth branch wiring 31b Sixth branch wiring 32 Connecting wiring 33a First branch wiring 33b Second branch wiring 34a First annular wiring 34b Second annular wiring 35 Inner - side base annular wiring 36 Connecting wiring 37 Base branch wiring 38a First branch wiring 38b Second branch wiring 38c Group branch wiring 39a First annular wiring 39b Second annular wiring 40 Sub - base branch wiring 41a Third branch wiring 41b Fourth branch wiring 42 Base branch wiring 43 Branch wiring 50 Electrode 51 Base branch wiring 52 Outer - loop wiring 61 Ferrite plate 62 Ferrite wall 70 NFC wiring

Claims

1. A coil layer including a coil having a bent region, A wiring board disposed on the coil layer, A plurality of conductive wirings formed on the wiring board, and At least a part of the plurality of conductive wirings intersects with the bent region within a predetermined angular range in a plan view, The plurality of conductive wirings include an outer loop wiring formed on the wiring board and A plurality of branch wirings included in the outer loop wiring, The plurality of branch wirings are branched in at least two axial directions intersecting each other, The plurality of branch wirings include a first branch wiring and a second branch wiring whose open ends are different from each other, A wireless power module characterized by the above.

2. The predetermined angular range includes 90°, The wireless power module according to claim 1.

3. The predetermined angular range includes a maximum value obtained by adding a preset value to 90° and a minimum value obtained by subtracting the preset value from 90°, The wireless power module according to claim 2.

4. The preset value is 5°, The wireless power module according to claim 3.

5. The plurality of conductive wirings further include An inner loop wiring formed on the wiring board and separated from the outer loop wiring, One end of the first branch wiring is connected to the outer loop wiring and the other end is open, One end of the second branch wiring is connected to the inner loop wiring and the other end is open, The wireless power module according to claim 1.

6. The first branch wiring and the second branch wiring intersect with the bent region within the predetermined angular range in a plan view, The wireless power module according to claim 5.

7. The first branch wiring and the second branch wiring are alternately branched from the outer loop and the inner loop wiring, The wireless power module according to claim 5.

8. The plurality of conductive wirings further include A base branch wiring branched from the outer loop wiring toward the inside of the wiring board, One end of the first branch wiring is connected to the outer loop wiring and the other end is open, One end of the second branch wiring is connected to the base branch wiring and the other end is open, The first branch wiring and the second branch wiring intersect with the bent region within the predetermined angular range in a plan view, The wireless power module according to claim 1.

9. The plurality of conductive wirings include An inner loop wiring formed on the wiring board and separated from the outer loop wiring, A connecting wiring that branches from the outer loop wiring toward the inside of the wiring board and branches so as to protrude by a predetermined length from the inner loop wiring; The connecting wiring connects the outer loop wiring and the inner loop wiring; The wireless power module according to claim 1.

10. One end of the first branch wiring is connected to the outer loop wiring, and the other end is open; One end of the second branch wiring is connected to the inner loop wiring, and the other end is open; The first branch wiring and the second branch wiring intersect within the predetermined angular range in plan view with the bent region; The wireless power module according to claim 9.

11. The plurality of conductive wirings; A plurality of inner base annular wirings formed on the wiring board and separated from the outer loop wiring; A connecting wiring that branches from the outer loop wiring toward the inside of the wiring board and branches so as to protrude by a predetermined length from the plurality of inner base annular wirings; A base branch wiring that branches from the outer loop wiring and branches so as to pass between the plurality of inner base annular wirings; The connecting wiring connects the outer loop wiring and the plurality of inner base annular wirings; The wireless power module according to claim 1.

12. One end of the first branch wiring is connected to the outer loop wiring, and the other end is open; One end of the second branch wiring is connected to any one of the plurality of inner base annular wirings, and the other end is open; The first branch wiring and the second branch wiring intersect within the predetermined angular range in plan view with the bent region; The wireless power module according to claim 11.

13. A main body; A cover arranged corresponding to the main body; Including a wireless power module provided between the main body and the cover; The wireless power module; A coil layer including a coil that is electrically connected to the main body and has a bent region; A wiring board arranged on the coil layer; Including a plurality of conductive wirings formed on the wiring board; At least a part of the plurality of conductive wirings intersect within a predetermined angular range in plan view with the bent region; The plurality of conductive wirings include an outer loop wiring formed on the wiring board and; A plurality of branch wirings included in the outer loop wiring; The plurality of branch wirings are branched in at least two axial directions that intersect each other; The plurality of branch wirings include a first branch wiring and a second branch wiring, where positions at which one ends are open are different from each other. Electronic device.

Images