KR20180091253A - Portable wireless power transmitter - Google Patents

Abstract

The present invention provides a portable wireless power transmitter. According to an embodiment of the present invention, the wireless power transmitter transmitting a power to a wireless power receiver comprises: a foldable lower board; a plurality of chips located above the lower board; a shielding member located above the plurality of chips; and a transmission coil part located above the shielding member, and facing the wireless power receiver. The plurality of chips, the shielding member and the transmission coil part are located by being divided into a plurality of blocks, wherein the plurality of blocks are coupled to or separated from each other while being supported by the lower board.

Description

[0001] Portable wireless power transmitter [0002]

An embodiment relates to a portable wireless power transmitter.

Recently, as the information and communication technology rapidly develops, a ubiquitous society based on information and communication technology is being made.

In order for information communication devices to be connected anytime and anywhere, sensors equipped with computer chips having communication functions should be installed in all facilities of the society. Therefore, power supply to these devices and sensors is a new problem.

In addition, not only cell phones but also music player devices such as Bluetooth handsets and iPods have been rapidly increasing, so charging the battery has become a new problem for users.

To solve this problem, wireless power transmission technology recently appeared. Wireless power transmission technology refers to a technique of wirelessly transmitting electrical energy from a transmitter to a receiver using magnetic induction principle. Such a wireless power transmitter has a stationary type and a horizontal type depending on the appearance.

1A and 1B show an external perspective view of a conventional wireless power transmitter 10a, 10b.

The conventional stationary wireless power transmitter 10a shown in FIG. 1A includes a circuit unit 12, a body 16, and a mounter 18, and includes a conventional horizontal wireless power transmitter 10b Is composed of a circuit part 12 and a body 16.

In wireless power transmitters 10a and 10b, circuitry 12 includes a transmit coil as part of providing power wirelessly to a wireless power receiver (not shown). The body (16) serves to receive the circuit part (12). Particularly, in the case of FIG. 1A, the body 16 is a portion connected to the mounter 18. The mounter 18 shown in FIG. 1A also serves to support the body 16 of the wireless power transmitter 10a.

Since the wireless power transmitters 10a and 10b transmit power wirelessly to a wireless power receiver, there may be a need for a user carrying the wireless power receiver to carry the wireless power transmitter. However, as shown in FIGS. 1A and 1B, since the conventional wireless power transmitters 10a and 10b have a shape that is too bulky or inconvenient to carry around such as being unable to be put in a user's pocket, Can not meet the needs of.

An embodiment provides a portable portable wireless power transmitter.

According to an embodiment, a wireless power transmitter for transmitting power to a wireless power receiver comprises: a foldable bottom board; A plurality of chips disposed on the lower board; A shielding member disposed on the plurality of chips; And a transmission coil portion disposed on the shield member and opposed to the wireless power receiver, wherein the plurality of chips, the shield member, and the transmission coil portion are divided into a plurality of blocks and disposed, Supported by the board, can be coupled to or spaced from each other.

For example, the lower board may include a base member having elasticity; And a flexible printed circuit board disposed around the base member and having a wiring electrically connected to the plurality of chips.

For example, the base member may comprise at least one of silicon or a polyimide material.

For example, the plurality of chips may be disposed inside the boundary between the plurality of blocks.

For example, in each of the plurality of blocks, the transmitting coil portion may include a medial portion disposed at the center of the block and having a first thickness; And an outer side portion extending from the inner side portion and disposed at an edge of each of the plurality of blocks, wherein the outer side portions of the adjacent blocks when the plurality of blocks are engaged with each other have a first thickness larger than the first thickness, And can be electrically connected.

For example, the first thickness T1 and the second thickness T2 may have the following relationship.

For example, the portable wireless power transmitter may further comprise a plurality of bodies supported by the lower board and each receiving the plurality of chips, the shielding member, and the transmitting coil part, which are divided into a plurality of blocks.

For example, in each of the plurality of blocks, the transmitting coil portion may include a medial portion disposed at the center of the block and having a first width; And an outer side portion extending from the inner side portion and disposed at an edge of each of the plurality of blocks, wherein the outer side portions of the adjacent blocks when the plurality of blocks are coupled to each other have a first width larger than the first width, And can be electrically connected.

For example, the first width W1 and the second width W2 may have the following relationship.

For example, in each of the plurality of blocks, the transmitting coil portion may include a medial portion disposed at the center of the block and having a first area; And an outer side portion extending from the inner side portion and disposed at an edge of each of the plurality of blocks, wherein the outer side portions of the adjacent blocks when the plurality of blocks are coupled to each other have a second area larger than the first width, And the first area A1 and the second area A2 may have the following relationship.

The portable wireless power transmitter according to the embodiment can be folded in a form suitable for carrying, and has portability.

1A and 1B show an external perspective view of a conventional wireless power transmitter.
2 is a block diagram schematically showing a wireless power transmission apparatus according to an embodiment.
3 is a cross-sectional view of a portable wireless power transmitter according to the embodiment shown in FIG.
FIG. 4 shows a plan view of the bottom board and the plurality of chips shown in FIG. 3 according to an embodiment.
5 is an enlarged cross-sectional view of the portion 'A' shown in FIG.
FIG. 6 is an enlarged cross-sectional view showing an enlarged view of a portion 'B' shown in FIG.
FIG. 7 is a plan view of the shielding member shown in FIG. 3 according to an embodiment of the present invention.
8 is an enlarged cross-sectional view of the portion 'C' shown in FIG.
Fig. 9 shows a top view of the transmission coil stage shown in Fig. 3;
10 shows a state in which a plurality of blocks are spaced apart from each other.
FIG. 11 is a cross-sectional view of an embodiment in which the wireless power transmitter of FIG. 3 is folded into a convenient form for carrying.
FIG. 12 shows a cross-sectional view of another embodiment in which the wireless power transmitter shown in FIG. 3 is fully folded in a convenient form for carrying.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate understanding of the present invention. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

In the description of the present embodiment, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) on or under includes both the two elements being directly in contact with each other or one or more other elements being indirectly formed between the two elements.

Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "first" and "second," "upper / upper / upper," and "lower / lower / lower" But may be used to distinguish one entity or element from another entity or element, without necessarily requiring or implying an order.

In the following description of the embodiments, an apparatus for transmitting wireless power on a wireless power system will be referred to as a " wireless power transmitter " for the sake of explanation, the entire apparatus including a wireless power transmitter, Quot; transmission device ". However, terms such as a wireless power transmitter, a transmitter, a transmitter, a transmitter, a wireless power transmitter, and the like may be used interchangeably as the same term as a wireless power transmitter.

In addition, an apparatus for receiving power transmitted from a wireless power transmitter included in a wireless power transmission apparatus wirelessly is referred to as a " wireless power receiver ". However, terms such as a wireless power receiving apparatus, a wireless power receiving apparatus, a receiver, a receiving apparatus, a receiving apparatus, and the like may be used interchangeably as the same term as a wireless power receiver.

A wireless power transmitter according to an embodiment can generate a magnetic field in a power transmitting terminal coil (hereinafter referred to as a transmitting coil part) to charge the wireless power receiver using an electromagnetic induction principle in which electricity is induced in a receiving terminal coil due to the influence of the magnetic field, The wireless power transmitter according to the embodiment may use various non-electric power transmission standards based on the electromagnetic induction method. Here, the wireless power receiver and the wireless power transmitter may include an electromagnetic induction wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA), which are wireless charging technology standards organizations.

Alternatively, the wireless power transmitter according to the embodiment may transmit power using a self-resonant method or a short wavelength radio frequency with a wireless power receiver. As such, embodiments are not limited to any particular energy delivery scheme from a wireless power transmitter to a wireless power receiver.

Also, the wireless power receiver may be a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, A portable electronic device such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing rod, a smart watch, .

Hereinafter, a wireless power transmission apparatus 1000 according to an embodiment, a portable wireless power transmitter 100 according to an embodiment, and a wireless power receiver 200 will be described with reference to the accompanying drawings. Although the wireless power transmission apparatus 1000, the portable wireless power transmitter 100 according to the embodiment, and the wireless power receiver 200 are described using the Cartesian coordinate system (x axis, y axis, z axis) for convenience, It is of course also possible to explain this.

2 is a block diagram schematically showing a wireless power transmission apparatus 1000 according to an embodiment.

The wireless power transmission apparatus 1000 shown in FIG. 2 may include a portable wireless power transmitter 100 and a wireless power receiver 200.

First, the wireless power transmitter 100 provides a place where the wireless power receiver 200 is seated, for example a charging area, and is responsible for wirelessly transmitting power to the wireless power receiver 200.

The wireless power transmitter 100 may wirelessly transmit power to the wireless power receiver 200 in various manners. For example, the wireless power transmitter 100 may wirelessly transmit power to the wireless power receiver 200 using a magnetic induction method, a self-resonant method, or a power transmission method using a short wavelength radio frequency. However, the embodiment is not limited to any particular way of wirelessly transmitting power from the wireless power transmitter 100 to the wireless power receiver 200.

Also, according to an embodiment, the wireless power transmitter 100 may include a lower board 110 and a plurality of blocks B1, B2, B3, B4. In the case of Fig. 2, although the number of the plurality of blocks is exemplified as four, the embodiment is not limited to this. That is, according to another embodiment, the plurality of blocks may be more than four, more than two, and less than four.

Hereinafter, it is assumed that the number of the plurality of blocks included in the wireless power transmitter 100 according to the embodiment is four, but the following description is also applicable to the case where the number of blocks is more than four, less than four, Can be applied.

FIG. 3 shows a cross-sectional view of a portable wireless power transmitter 100 according to the embodiment shown in FIG.

The portable wireless power transmitter 100 shown in FIG. 3 may include a lower board 110, a plurality of chips 120, a shielding member 130, a transmitting coil 140, and a body 150.

Referring to FIGS. 2 and 3, the lower board 110 has a foldable characteristic and supports the first through fourth blocks B1, B2, B3, and B4. That is, when the first to fourth blocks B1 to B4 are coupled to or spaced from each other, the lower board 110 can support the first to fourth blocks B1 to B4.

The plurality of chips 120, the shielding member 130 and the transmission coil 140 may be divided into first through fourth blocks B1 through B4.

According to the embodiment, the lower board 110 may include a base member 112 and a flexible printed circuit board (FPCB) 114.

The base member 112 may be embodied by a material having elasticity such that the wireless power transmitter 100 may be folded or unfolded together when it is folded or unfolded. For example, the base member 112 may comprise at least one of a silicon or polyimide material.

The flexible printed circuit board 114 has an island which is a positive (+) terminal and a negative (-) terminal disposed on the wiring and wire disposed on the periphery of the base member 112, for example, . Accordingly, the plurality of chips 120 disposed on the lower board 110 can be electrically connected to the positive (+) terminal and the negative (-) terminal of the flexible printed circuit board 114. The wiring of the flexible printed circuit board 114 may be formed using various methods such as plating, PCB method, implant method, and gravure offset method.

FIG. 4 shows a plan view of the lower board 110 and the plurality of chips 120 shown in FIG. 3, and FIG. 5 is a cross-sectional view showing an enlarged view of the 'A' portion shown in FIG.

The plurality of chips 120 may be disposed on the lower board 110 to form a kind of driving board. The wireless power transmitter 100 according to the embodiment may have a cross-sectional shape in which chips 120 are disposed in each of the first to fourth blocks B1 to B4, as illustrated in FIG. 4, eight chips 120 are disposed in each of the first and second blocks B1 and B2, and the third and fourth blocks B3 and B4 are disposed in the first and second blocks B1 and B2, respectively, , And B4 may have a planar shape in which nine chips 120 are disposed, respectively, but the embodiments are not limited thereto. That is, according to another embodiment, the wireless power transmitter 100 may have a cross-sectional shape in which more or less than two chips are disposed in each of the first to fourth blocks B1 to B4, Chips smaller in size may have a planar shape disposed in each of the blocks B1 to B4.

4 and 5, the plurality of chips 120 are arranged inside the boundaries BO1, BO2 and BO3 between the first to fourth blocks B1 to B4, that is, each of the blocks B1, B2 and B3 , B4).

FIG. 6 is an enlarged cross-sectional view showing an enlarged portion 'B' shown in FIG. 3, and FIG. 7 is a plan view of the shielding member 130 shown in FIG.

3, 6, and 7, the first shielding member 130 may be disposed between a lower portion of the transmitting coil portion 142 and a plurality of chips 120 disposed on the lower board 110 . The upper portion of the shielding member 130 may be attached to the transmitting coil portion 142 using an adhesive. The shielding member 130 is disposed below the transmitting coil part 142 so as to shield the magnetic field induced in the transmitting coil part 142 so that the magnetic field does not affect the electronic part.

Although not shown, the wireless power receiver 200 includes a receiving coil disposed opposite the transmitting coil portion 142, another shielding member disposed on top of the receiving coil, and another And may include a printed circuit board.

The shielding member 130 may be embodied as a flexible or non-flexible material. For example, the shielding member 130 may be made of a material selected from the group consisting of magnetic stainless steels (Fe-Cr-Al-Si), sandstones (Fe-Si-Al), permalloys (Fe- Fe-Si-Cr-Ni alloy, Fe-Si-Cr alloy, Fe-Si-Al-Ni-Cr alloy and ferrite . In addition, by mixing these materials with organic materials and compositing them, the shielding member 130 may be realized in the form of a film, and heat and pressure may be used to mold the shielding member 130, The present invention is not limited to the specific material or shape of the base 130.

FIG. 8 is an enlarged cross-sectional view of the portion 'C' shown in FIG. 3, and FIG. 9 is a plan view of the transmitting coil end 140 shown in FIG.

8 and 9, the transmitting coil 140 may include a transmitting coil part 142 and a coil receiving hole 144. [ The transmitting coil 140 may be disposed on the upper side of the shielding member 130.

The coil receiving hole 144 serves to receive the transmitting coil part 142 and may be filled with air or a nonconductive material.

The wireless power transmitter 100 can transmit wireless power using the transmitting coil section 142 as well as exchange various information with the wireless power receiver 200 through the transmitting coil section 142. [ However, the embodiment is not limited to this. That is, according to another embodiment, the wireless power transmitter 100 includes a separate coil corresponding to each transmission coil of the transmission coil section 142, and the wireless power transmitter 200, In-band communication.

Alternatively, the wireless power transmitter 100 may exchange information with the wireless power receiver 200 using a separate channel rather than a feedback signal through the transmit coil portion 142. That is, the wireless power transmitter 100 may be coupled to the wireless power receiver 200 using a separate communication means, e.g., Bluetooth, NFC, Zigbee, etc., Lt; / RTI > In this case, the communication for information exchange with the wireless power receiver 200 may use a frequency band different from the frequency for wireless power transmission.

The transmitting coil portion 142 may be disposed opposite the receiving coil of the wireless power receiver 200 on the shielding member 130 to perform the above-described role. In addition, the transmitting coil section 142 may have the form of an FPCB or a wire.

In each of the first to fourth blocks B1 to B4, the transmitting coil part 142 may include inner parts IP1 and IP2 and outer parts OP1 and OP2.

The inner portions IP1 and IP2 may be disposed at the center of each of the first to fourth blocks B1 to B4 and may have a first thickness T1 in the z-axis direction. In addition, although not shown, each of the inner portions IP1 and IP2 may have a first width W1 in the x-axis direction and a first area A1 in the x-axis and z-axis directions. That is, the first area A1 may correspond to a product of the first thickness T1 and the first width W1.

The outer portions OP1 and OP2 have a second thickness T2 larger than the first thickness T1 in the z-axis direction and extend from the inner portions OP1 and OP2 to form a plurality of first through fourth blocks B1- B4, respectively. Also, although not shown, each of the outer portions OP1 and OP2 may have a second width W2 in the x-axis direction and a second area A2 in the x-axis and z-axis directions. That is, the second area A2 may correspond to the product of the second thickness T2 and the second width W2.

When the first to fourth blocks B1 to B4 are coupled to each other, the outer portions OP1 and OP2 of adjacent blocks can be electrically connected to each other. 8, when the third block B3 and the fourth block B4 are coupled to each other, the outer portion OP1 of the third block B3 and the outer portion OP4 of the fourth block B4 OP2 may be electrically connected to each other.

When the first width W1 and the second width W2 are equal to each other in each of the first to fourth blocks B1 to B4, the first thickness T1 and the second thickness T2 satisfy the following mathematical formula Can have the same relationship as Equation (1).

When the first thickness T1 and the second thickness T2 are equal to each other in each of the first to fourth blocks B1 to B4, the first width W1 and the second width W2 are expressed by the following mathematical expressions The following equation (2) can be obtained.

In each of the first to fourth blocks B1 to B4, the first area A1 and the second area A2 may have the relationship represented by the following equation (3).

For example, if the second thickness T2 is greater than the first thickness T1 or if the second width W2 is greater than the first width W1, or if the second area A2 is greater than the first area A1 The transmitting coil part 142 between adjacent blocks is connected without being electrically disconnected when the adjacent blocks (for example, the third and fourth blocks B3 and B4 in Fig. 8) The possibility may increase. That is, the possibility that the transmitting coil part 142 can not electrically contact when the blocks are combined is reduced.

3, the plurality of chips 120, the shielding member 130, and the transmitting coil part 142 are connected to the first to fourth blocks 130, (B1 to B4).

The plurality of bodies 150 are supported by the lower board 110 and serve to accommodate a plurality of chips 120 divided into a plurality of blocks, a shield member 130 and a transmitting coil section 142, respectively. That is, the number of the plurality of bodies 150 may be equal to the number of the plurality of blocks. In the above-described example, since the number of blocks is four, the number of the bodies 150 can also be four.

10 shows a state in which a plurality of blocks B1 to B4 are spaced apart from each other.

10, the first to fourth bodies 150-1 to 150-4 defining the first to fourth blocks B1 to B4 are separated from each other while being supported by the lower board 110 . As described above, the first through fourth bodies 150-1 through 150-4 are separated from each other and supported by the lower board 110.

FIG. 11 is a cross-sectional view of a wireless power transmitter 100 shown in FIG. 3, which is folded in a convenient form for carrying, FIG. 12 is a view of a wireless power transmitter 100 shown in FIG. Sectional view according to another embodiment fully folded in a convenient form. For the sake of understanding, only the transmitting coil part 142 is shown at the transmitting coil end 140 in Figs. 11 and 12.

The wireless power transmitter 100 according to the embodiment may be folded as shown in FIG. 11 or 12, in an expanded form as shown in FIG. Thus, when the wireless power transmitter 100 is folded, the volume of the wireless power transmitter 100 may be reduced so that the wireless power transmitter 100 can be inserted into a pocket of a user who wants to carry the wireless power transmitter 100.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100: wireless power transmitter 110: bottom board
120: chip 130: shield member
140: transmitting coil 150: body
200: wireless power receiver 1000: wireless power transmission device

Claims (10)

A wireless power transmitter for transmitting power to a wireless power receiver,
Foldable bottom board;
A plurality of chips disposed on the lower board;
A shielding member disposed on the plurality of chips; And
A transmitting coil portion disposed on the shielding member and opposite the wireless power receiver,
Wherein the plurality of chips, the shielding member, and the transmission coil unit are divided into a plurality of blocks,
And the plurality of blocks are coupled to or spaced from each other while being supported by the bottom board. The apparatus of claim 1, wherein the lower board
A base member having elasticity; And
And a flexible printed circuit board disposed around the base member and having a wiring electrically connected to the plurality of chips. 3. The portable wireless power transmitter of claim 2, wherein the base member comprises at least one of silicon or a polyimide material. The portable wireless power transmitter according to claim 1, wherein the plurality of chips are disposed inside a boundary between the plurality of blocks. 2. The apparatus of claim 1, wherein in each of the plurality of blocks,
An inner portion disposed at the center of the block and having a first thickness; And
And an outer portion extending from the inner portion and disposed at an edge of each of the plurality of blocks, the outer portion having a second thickness greater than the first thickness,
Wherein the outer portions of adjacent blocks when the plurality of blocks are coupled are electrically connected to each other. The portable wireless power transmitter according to claim 5, wherein the first thickness (T1) and the second thickness (T2) have the following relationship.

The portable wireless power transmitter according to claim 1, further comprising a plurality of bodies supported by the lower board, each of which houses the plurality of chips, the shielding member and the transmission coil part, which are divided into a plurality of blocks. 2. The apparatus of claim 1, wherein in each of the plurality of blocks,
An inner portion disposed at the center of the block and having a first width; And
And an outer portion extending from the inner portion and disposed at an edge of each of the plurality of blocks, the outer portion having a second width larger than the first width,
Wherein the outer portions of adjacent blocks when the plurality of blocks are coupled are electrically connected to each other. The portable wireless power transmitter according to claim 8, wherein the first width (W1) and the second width (W2) have the following relationship.

2. The apparatus of claim 1, wherein in each of the plurality of blocks,
An inner portion disposed at the center of the block and having a first area; And
And an outer side portion extending from the inner side portion and disposed at an edge of each of the plurality of blocks, the outer side portion having a second area larger than the first area,
The outer side portions of adjacent blocks when the plurality of blocks are coupled are electrically connected to each other,
Wherein the first area (A1) and the second area (A2) have the following relationship.

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