Wireless power transmission device and method of manufacturing same

Abstract

The invention relates to a wireless power transmission device and a method of manufacturing the same. Disclosed are a wireless power transmitter and a wireless power transmission method thereof that consider interference between a plurality of wireless power transmitters in a multi-charging environment.

Description

TECHNICAL FIELD

[0001] The following embodiments relate to a Radio Frequency (RF) wireless power transmission technology, and to a wireless power transmission apparatus and a method of operating the same. BACKGROUND

[0002] Recently, as the popularity of portable terminals and the development of wireless charging technology, wireless charging systems targeting portable terminals are also being actively developed.

[0003] The wireless charging technology is a technology that charges a portable terminal based on at least one of a magnetic resonance method, a magnetic induction method, or a radio frequency, according to a power signal transmitted from a wireless power transmission apparatus, and in the wireless charging system, a wireless power reception apparatus is built in the portable terminal, thereby receiving a power signal from the wireless power transmission apparatus and being used for charging.

[0004] In the existing wireless charging technology as described above, only the reception frequency of the RF wireless power receiver is considered to control the frequency of the power signal transmitted by the RF wireless power transmitter, and in addition, in a multi-charging environment in which a plurality of RF wireless power transmitters exist, interference between the plurality of RF wireless power transmitters is not considered.

[0005] In this regard, in a multi-charging environment, a technology that considers interference between a plurality of RF wireless power transmitters is required. SUMMARY

[0006] An embodiment of the present application proposes a technology that minimizes interference between a plurality of RF wireless power transmitters and improves power transmission efficiency in a multi-charging environment, an RF wireless power transmitter and an RF wireless power transmission method thereof.

[0007] However, the technical problem to be solved by the present application is not limited to the above-described problem, but can be variously expanded within the scope of the technical idea and field of the present application.

[0008] According to an embodiment, a wireless power transmitter included in a wireless charging system can include a transmission part that transmits a power signal to at least one wireless power receiver, a detection part that acquires information about an interference signal from other wireless power transmitters, and a control part that controls at least one parameter of the power signal based on the information of the interference signal.

[0009] According to an embodiment, the control part can control at least one parameter of the power signal transmitted from the wireless power transmitter so as to minimize interference caused by the interference signal that is the power signal transmitted from the other wireless power transmitter.

[0010] According to still another embodiment, the present application features that the control section can control at least one parameter of frequency, polarization direction, or phase of the power signal transmitted from the wireless power transmitter based on information about frequency, polarization direction, and phase of the interference signal.

[0011] According to still another embodiment, the present application features that the control section can control frequency of the power signal transmitted from the wireless power transmitter to be in a different frequency band from that of the interference signal, or control polarization direction of the power signal transmitted from the wireless power transmitter to be orthogonal to that of the interference signal, or control phase of the power signal transmitted from the wireless power transmitter to be orthogonal or identical to that of the interference signal.

[0012] According to another embodiment, the present application features that the control section can control at least one parameter of duty ratio, beam sharpness, or beam shape of the power signal transmitted from the wireless power transmitter based on information about duty ratio, beam sharpness, and beam shape of the interference signal.

[0013] According to still another embodiment, the present application features that the control section can further control at least one parameter of the power signal based on reception characteristic information of the at least one wireless power receiver.

[0014] According to still another embodiment, the present application features that the control section can predict future interference due to the interference signal using an interference prediction model that has been learned based on past interference patterns and control results, and control at least one parameter of the power signal based on the predicted interference.

[0015] According to still another embodiment, the present application features that the control section can control at least one parameter of the power signal individually for a plurality of wireless power receivers based on position information and reception characteristic information of the plurality of wireless power receivers in an environment where the plurality of wireless power receivers are located.

[0016] According to still another embodiment, the present application features that the control section can dynamically adjust level of the power signal based on information of the interference signal and charging state of the at least one wireless power receiver.

[0017] According to still another embodiment, the present application features that the wireless power transmitter can transmit in the power signal encrypted authentication information in a state designed to transmit the power signal only to authenticated wireless power receivers.

[0018] According to still another embodiment, the wireless power transmitter of the present application can include a digital signal processor for controlling at least one parameter of the power signal, and a phase array antenna controlled by the digital signal processor.

[0019] According to an embodiment, a wireless power transmission method of a wireless power transmitter included in a wireless charging system can include an acquisition step of acquiring information about an interference signal from other wireless power transmitters, a control step of controlling at least one parameter of the power signal based on the information about the interference signal, and a transmission step of transmitting the power signal whose parameter is controlled to at least one wireless power receiver.

[0020] According to an embodiment, the control step can be a step of controlling at least one parameter of the power signal transmitted from the wireless power transmitter so as to minimize interference caused by the interference signal that is the power signal transmitted from the other wireless power transmitter.

[0021] According to still another embodiment, the control step can be a step of controlling at least one parameter of a frequency, a polarization direction, or a phase of the power signal transmitted from the wireless power transmitter based on information about the frequency, the polarization direction, and the phase of the interference signal.

[0022] According to another embodiment, the control step can include one of a step of controlling a frequency of the power signal transmitted from the wireless power transmitter to be in a different frequency band from a frequency of the interference signal, a step of controlling a polarization direction of the power signal transmitted from the wireless power transmitter to be a polarization direction orthogonal to a polarization direction of the interference signal, or a step of controlling a phase of the power signal transmitted from the wireless power transmitter to be orthogonal or identical to a phase of the interference signal.

[0023] According to still another embodiment, in the control step, at least one parameter of a duty cycle, a beam sharpness, or a beam shape of the power signal transmitted from the wireless power transmitter can be controlled based on information about the duty cycle, the beam sharpness, or the beam shape of the interference signal.

[0024] According to still another embodiment, the control step can be a step of controlling at least one parameter of the power signal based on reception characteristic information of the at least one wireless power receiver.

[0025] According to still another embodiment, the acquiring step can include one of receiving information of the interference signal from the other wireless power transmitter or analyzing the interference signal to extract information of the interference signal after receiving the interference signal from the other wireless power transmitter.

[0026] An embodiment of the present application proposes a technique for minimizing interference between a plurality of radio frequency wireless power transmitters in a multi-charging environment and improving power transmission efficiency of a radio frequency wireless power transmitter and a radio frequency wireless power transmission method thereof.

[0027] However, the effects of the present application are not limited to the above-mentioned effects, but can be variously extended within the scope of the technical idea and the technical scope of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A diagram for illustrating a wireless charging environment of an embodiment.

[0029] Figure 2 A diagram for illustrating a radio frequency wireless power transmitter of an embodiment.

[0030] Figure 3 A diagram for illustrating a frequency spectrum of a power signal transmitted by a radio frequency wireless power transmitter of an embodiment.

[0031] Figures 4 to 5 A diagram for illustrating an effect of a radio frequency wireless power transmitter of an embodiment.

[0032] Figure 6 A flowchart of a radio frequency wireless power transmission method of a radio frequency wireless power transmitter of an embodiment.

[0033] Figure 7 A diagram for illustrating a situation occurring in a power transmission process of a radio frequency wireless power transmission method of an embodiment.

[0034] EXPLANATION OF REFERENCE NUMERALS

[0035] 100: wireless charging environment 110, 120: radio frequency wireless power transmitter

[0036] 111: detection unit 112: control unit

[0037] 113: power signal generation unit 114: at least one rectifier circuit

[0038] 115: at least one transmission antenna 115-1, 115-2: a plurality of power supply points

[0039] 130: at least one radio frequency wireless power receiver DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present application will be described in detail with reference to accompanying drawings. However, the present application is not limited or confined to the embodiments. And, the same reference numerals presented in each drawing represent the same components.

[0041] And, the terminology used in the present specification is the terminology that is appropriately used in order to express the preferred embodiments of the present application, and can be changed according to the intention of the viewer, the operator, or the convention of the technical field to which the present application pertains, etc. Therefore, the definition of the terminology should be made based on the entire content of the present specification. For example, in the present specification, the singular form includes the plural form unless the context clearly indicates otherwise. And, in the present specification, "comprises" and / or "comprising" means that the mentioned structural elements, steps, actions and / or devices do not exclude the presence or addition of one or more other structural elements, steps, actions and / or devices. And, in the present specification, the terms of first, second, etc. are used in order to describe various regions, directions, shapes, etc., and the regions, directions, shapes are not limited to the terms as described above. The terms are used only in order to distinguish one specified region, direction or shape from other regions, directions or shapes. Therefore, in one embodiment, a part mentioned as a first part can be mentioned as a second part in another embodiment.

[0042] And, although the embodiments of the present application are different from each other, they are not necessarily mutually exclusive. For example, the specific shape, structure and characteristics described herein can be implemented as other embodiments without departing from the technical idea and scope of the present application related to one embodiment. And, the position, arrangement or structure of each structural element in the scope of each disclosed embodiment can be changed without departing from the technical idea and scope of the present application.

[0043] Hereinafter, with reference to the accompanying drawings, a wireless power transmitter and a wireless power transmission method thereof considering interference between a plurality of wireless power transmitters in a multi-charging environment according to an embodiment of the present application will be described. And, hereinafter, it is assumed that the wireless power transmitter and the wireless power transmission method transmit a power signal in the form of radio frequency, but are not limited thereto.

[0044] Figure 1 FIG. 1 is a diagram for illustrating a wireless charging environment of an embodiment, Figure 2 FIG. 2 is a diagram for illustrating a radio frequency wireless power transmitter of an embodiment, Figure 3 FIG. 3 is a diagram for illustrating a frequency spectrum of a power signal transmitted by a radio frequency wireless power transmitter of an embodiment, Figures 4 to 5 FIG. 4 is a diagram for illustrating an effect of a radio frequency wireless power transmitter of an embodiment.

[0045] Referring to the attached diagram, the wireless charging environment 100 refers to a multi-charging environment in which multiple radio frequency wireless power transmitters 110 and 120 transmit power signals to at least one radio frequency wireless power receiver 130.

[0046] Therefore, the radio frequency wireless power transmitter described below refers to one of a plurality of radio frequency wireless power transmitters 110 and 120 operating in this multi-charge environment 100. For ease of explanation, the case where the radio frequency wireless power transmitter is one of the plurality of radio frequency wireless power transmitters 110 and 120, specifically radio frequency wireless power transmitter 110, will be described below.

[0047] The radio frequency wireless power transmitter 110 can have a wireless charging function that transmits power signals via radio frequency. The power signal can be in the form of a pulse or a continuous wave (CW).

[0048] Therefore, such as Figure 2 As shown, the radio frequency wireless power transmitter 110 may include a detection unit 111, a control unit 112, a power signal generation unit 113, at least one rectifier circuit 114, and at least one transmitting antenna 115. However, the radio frequency wireless power transmitter 110 is not limited to the structure described above, but can be implemented to appropriately adjust the frequency, polarization direction, and phase of the transmitted power signal.

[0049] The detection unit 111 is a structural unit that acquires and detects information related to interference signals from other radio frequency wireless power transmitters 120 (hereinafter, interference signals refer to power signals transmitted by radio frequency wireless power transmitters 120 other than radio frequency wireless power transmitters 110). It receives the information of the interference signals directly or indirectly from other radio frequency wireless power transmitters 120, or after receiving the interference signals from radio frequency wireless power transmitters 120, it extracts the information of the interference signals by analyzing the interference signals, thereby acquiring and detecting the information of the interference signals.

[0050] The information related to the interference signal may include information related to the frequency, polarization direction, and phase of the interference signal. The detection unit 111 can receive this information directly or indirectly from the radio frequency wireless power transmitter 120, or, after receiving the interference signal, extract the information by analyzing the interference signal, thereby acquiring and detecting information about the interference signal.

[0051] The detection unit 111 can distinguish between detecting other radio frequency wireless power transmitters 120 whose information has been acquired in advance and detecting new other radio frequency wireless power transmitters whose information has not been acquired in advance in order to perform interference signal detection.

[0052] For example, when the information about the interference signal as the power signal transmitted by the other radio frequency wireless power transmitter 120 is acquired in advance, the detection section 111 does not need to directly or indirectly receive or analyze and extract the information again with respect to the interference signal of the other radio frequency wireless power transmitter 120. Thus, when the detection section 111 acquires the information about the interference signal as the power signal transmitted by the other radio frequency wireless power transmitter 120 in advance, the corresponding information is stored and simply loaded, and thus the information about the interference signal of the other radio frequency wireless power transmitter 120 can be acquired.

[0053] As still another example, with respect to a new other radio frequency wireless power transmitter for which the information is not acquired in advance, the detection section 111 directly or indirectly receives or analyzes and extracts the information about the interference signal as the power signal transmitted by the new other radio frequency wireless power transmitter, and thus the information about the interference signal of the new other radio frequency wireless power transmitter can be acquired.

[0054] As another example, when the new other radio frequency wireless power transmitter is the same kind or model of transmitter as the other radio frequency wireless power transmitter 120 for which the information is acquired in advance, even if the information about the interference signal of the new other radio frequency wireless power transmitter is not stored, the detection section 111 detects that the new other radio frequency wireless power transmitter is the same kind or model of transmitter as the other radio frequency wireless power transmitter 120 for which the information is acquired in advance, and thus it is predicted that the interference signal of the new radio frequency wireless power transmitter is the same as or similar to the interference signal of the other radio frequency wireless power transmitter 120 for which the information is acquired in advance, and thus the information about the interference signal of the other radio frequency wireless power transmitter 120 stored can be loaded and acquired.

[0055] The control section 112 can control at least one parameter of the power signal based on the information of the interference signal. In more detail, the control section 112 can control at least one parameter of the frequency, the polarization direction, or the phase of the power signal transmitted by the radio frequency wireless power transmitter 110 based on the information about the frequency, the polarization direction, and the phase of the interference signal.

[0056] Here, the control of at least one parameter about the power signal by the control section 112 based on the information of the interference signal means adjustment and change of at least one parameter about the power signal transmitted by the radio frequency wireless power transmitter 110 to minimize the interference caused by the interference signal.

[0057] For example, the control section 112 controls the frequency of the power signal transmitted by the radio frequency wireless power transmitter 110 to a frequency band different from the frequency of the interference signal, and thus the interference of the power signal caused by the interference signal can be minimized. Here, the change, the adjustment, and the control of the frequency mean frequency hopping.

[0058] As still another example, the control section 112 controls the polarization direction of the power signal transmitted by the radio frequency wireless power transmitter 110 to be a polarization direction orthogonal to the polarization direction of the interference signal, whereby the interference with the power signal caused by the interference signal can be minimized.

[0059] As still another example, the control section 112 can control the phase of the power signal transmitted by the radio frequency wireless power transmitter 110 to be orthogonal or identical to the phase of the interference signal, whereby the interference with the power signal caused by the interference signal can be minimized.

[0060] As described above, in controlling the frequency, polarization direction, or phase of the power signal, the control section 112 can sequentially control the frequency, polarization direction, and phase in order. For example, according to the information of the interference signal, when the interference signal is interfering with or will interfere with the power signal transmitted by the radio frequency wireless power transmitter 110, the control section 112 changes and adjusts the frequency of the power signal and then transmits to the at least one radio frequency wireless power receiver 130. Even if the frequency of the power signal is controlled, when the interference signal is still interfering with or will interfere with the power signal, the control section 112 changes and adjusts the frequency, as well as the polarization direction and phase of the power signal, and then transmits to the at least one radio frequency wireless power receiver 130.

[0061] However, the present application is not limited or restricted to this, and regardless of the order of control of the parameters described, the radio frequency wireless power transmitter 110 can control at least one of the frequency, polarization direction, or phase of the power signal.

[0062] Also, the control section 112 can control at least one of the duty ratio, beam sharpness, or beam shape of the power signal transmitted by the radio frequency wireless power transmitter 110 based on information related to the duty ratio, beam sharpness, and beam shape of the interference signal.

[0063] As in the case of controlling at least one of the frequency, polarization direction, or phase, the control section 112 adjusts and changes at least one of the duty ratio, beam sharpness, or beam shape of the power signal transmitted from the radio frequency wireless power transmitter 110 in a manner that minimizes the interference caused by the interference signal.

[0064] For example, the control section 112 can control the power signal in a manner having a duty ratio, beam sharpness, or beam shape different from the duty ratio, beam sharpness, or beam shape of the interference signal.

[0065] The above describes that the control section 112 controls at least one of the frequency, polarization direction, phase, duty cycle, beam sharpness, or beam shape of the power signal in consideration of the interference signal of the power signal transmitted by the other radio frequency wireless power transmitter 120 other than the radio frequency wireless power transmitter 110 in the multi-charging environment 100, but the control section 112 is not limited or restricted thereto and can control at least one of the frequency, polarization direction, phase, duty cycle, beam sharpness, or beam shape of the power signal in consideration of the reception characteristic information of the at least one radio frequency wireless power receiver 130 in a manner of securing the power reception performance of the at least one radio frequency wireless power receiver 130.

[0066] As an example, the control section 112 can also control at least one of the frequency, polarization direction, phase, duty cycle, beam sharpness, or beam shape of the power signal transmitted from the radio frequency wireless power transmitter 110 based on information about the reception frequency, reception polarization direction, reception phase, reception duty cycle, reception beam sharpness, or reception beam shape of the at least one radio frequency wireless power receiver 130.

[0067] That is, the control section 112 controls at least one of the frequency, polarization direction, phase, duty cycle, beam sharpness, or beam shape of the power signal transmitted from the radio frequency wireless power transmitter 110 in consideration of the interference frequency, interference polarization direction, interference phase, interference duty cycle, interference beam sharpness, and interference beam shape of the interference signal and the reception frequency, reception polarization direction, reception phase, reception duty cycle, reception beam sharpness, and reception beam shape of the at least one radio frequency wireless power receiver 130 in a manner of minimizing the interference caused by the interference signal while maximizing the power reception efficiency in the at least one radio frequency wireless power receiver 130.

[0068] Also, the control section 112 can dynamically adjust the level of the power signal based on the information of the interference signal and the charging state of the at least one radio frequency wireless power receiver 130.

[0069] Also, the control section 112 predicts future interference occurring due to the interference signal using an interference prediction model that is learned in advance based on past interference patterns and control results, and preferentially controls at least one parameter of the power signal based on the predicted interference.

[0070] Also, the control section 112 can individually control at least one parameter of the power signal according to a plurality of radio frequency wireless power receivers in an environment where the plurality of radio frequency wireless power receivers are located based on position information and reception characteristic information of the plurality of radio frequency wireless power receivers.

[0071] The power signal-related parameter control of the control section 112 described above can be performed before the radio frequency power transmitter 110 starts operating or can be performed during the radio frequency power transmitter 110 is operating.

[0072] For example, the control section 112 starts transmitting the power signal whose parameters are controlled after performing the power signal-related parameter control before transmitting the power signal.

[0073] As another example, the control section 112 performs the aforementioned power signal-related parameter control during the transmission of the power signal, whereby the transmitted power signal can be converted into the power signal whose parameters are controlled in real time and continuously transmitted.

[0074] Although the description is made that the control section 112 controls at least one of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal as the individual control of at least one of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal, it is not limited or restricted thereto.

[0075] For example, the control of at least one of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal described above can be achieved by pre-generating at least one of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal as a plurality of sets, and selecting one of the plurality of sets to be applied when the interference signal is detected.

[0076] The power signal generation section 113 is a configuration section for generating a power signal, and can generate a power signal whose frequency, phase, duty cycle, beam sharpness, and beam shape are adjusted under the control of the control section 112.

[0077] The at least one rectifier circuit 114 is a configuration section for transmitting a power signal having a specific frequency band from the power signal generation section 113 to the at least one transmission antenna 115, and can be omitted according to an example.

[0078] The at least one transmission antenna 115 includes a plurality of power supply points 115-1, 115-2, and selectively uses one of the plurality of power supply points 115-1, 115-2 under the control of the control section 112, whereby the polarization direction of the power signal can be controlled.

[0079] For example, the at least one transmission antenna 115 has two power supply points 113-1, 113-2 having polarization directions orthogonal to each other, and thus can transmit a power signal according to the determined polarization direction after determining one of the orthogonal polarization directions.

[0080] The at least one rectifier circuit 114 and at least one transmitting antenna 115 described above can be constituted by a structural part called the transmitting section.

[0081] As described above, the radio frequency wireless power transmitter 110 transmits power signals that control parameters, taking into account interference signals from other radio frequency wireless power transmitters 120, such as... Figure 3 As shown in the spectrum, it can eliminate and prevent interference from other radio frequency wireless power transmitters 120 and achieve the technical effect of transmitting power signals.

[0082] For example, in a wireless charging environment 100 including existing radio frequency wireless power transmitters (device 1, device 2, device 3), in order for each radio frequency wireless power transmitter (device 1, device 2, device 3) to smoothly transmit power signals, the following should be satisfied: Figure 4 The physical distance between the radio frequency wireless power transmitters (device 1, device 2, device 3) shown at the top should be as follows: Figure 4 The frequency bands of the power signals transmitted by the radio frequency wireless power transmitters (device 1, device 2, device 3) shown at the lower end of the diagram should be separated.

[0083] Conversely, in a wireless charging environment 100 including radio frequency wireless power transmitters (device 1, device 2, device 3) employing techniques for controlling power signals according to the interference signals, such as Figure 5 As shown at the top, the radio frequency wireless power transmitters (device 1, device 2, and device 3) are not physically separated; even if they overlap, they can still transmit power signals smoothly, as shown above. Figure 5 As shown at the bottom, even if the frequency bands of the power signals transmitted by the radio frequency wireless power transmitters (device 1, device 2, device 3) overlap, the power signals can still be transmitted smoothly.

[0084] Therefore, in a wireless charging environment 100 that employs a technique for controlling power signals with interference signals of a radio frequency wireless power transmitter 110 according to an embodiment, it is possible to achieve the effect of maximizing power transmission efficiency with lower output power.

[0085] One embodiment of the radio frequency wireless power transmitter 110 is not limited to or restricted to the described structure, but may include a digital signal processor (DSP) for controlling at least one parameter of the power signal and a phase-arranged antenna controlled by the DSP.

[0086] Also, the RF wireless power transmitter 110 is designed to transmit a power signal only to an authenticated RF wireless power receiver, and can also be implemented to transmit the power signal with encrypted authentication information. For example, the RF wireless power transmitter 110 retains a key that allows reception and storage of a power signal transmitted by the RF wireless power transmitter 110 to an authenticated RF wireless power receiver, and does not retain a corresponding key for an unauthenticated RF wireless power receiver, so that the unauthenticated RF wireless power receiver does not receive the power signal. After the authentication information is decrypted using only the key retained by the authenticated RF wireless power receiver, the authenticated RF wireless power receiver can be allowed to receive and store the power signal.

[0087] Figure 6 A flowchart of an RF wireless power transmission method of an RF wireless power transmitter according to an embodiment is shown. The RF wireless power transmission method described below is performed by the RF wireless power transmitter 110 described above by reference to Figures 1 to 5 The RF wireless power transmitter 110 described above performs as a prerequisite.

[0088] In step S610, the detection unit 111 can acquire information about the interference signal from the RF wireless power transmitter.

[0089] In more detail, in step S610, the detection unit 111 can directly or indirectly receive information about the interference signal from the other RF wireless power transmitter 120, or can acquire and detect information about the interference signal by analyzing the interference signal and extracting information about the interference signal after receiving the interference signal from the other RF wireless power transmitter 120.

[0090] Among them, the information about the interference signal can include information about a frequency, a polarization direction, and a phase of the interference signal. In this regard, the detection unit 111 can directly or indirectly receive information about the frequency, the polarization direction, and the phase of the interference signal from the other RF wireless power transmitter 120, or can acquire and detect information about the interference signal by analyzing the interference signal and extracting information about the frequency, the polarization direction, and the phase of the interference signal after receiving the interference signal.

[0091] Also, the information about the interference signal can include information about a duty cycle, a beam sharpness, and a beam shape of the interference signal. In this regard, the detection unit 111 can directly or indirectly receive information about the duty cycle, the beam sharpness, and the beam shape of the interference signal from the other RF wireless power transmitter 120, or can acquire and detect information about the interference signal by analyzing the interference signal and extracting information about the duty cycle, the beam sharpness, and the beam shape of the interference signal after receiving the interference signal.

[0092] In step S620, the control section 112 can determine or predict whether or not the transmission of the power signal in the radio frequency power transmitter 110 is disturbed or will be disturbed, based on the information of the interference signal.

[0093] When the determination or prediction result is that the disturbance occurs, in step S630, the control section 112 can control at least one parameter of the power signal.

[0094] Specifically, in step S630, the control section 112 can control at least one parameter of the power signal transmitted by the radio frequency power transmitter 110 in such a manner that the disturbance caused by the interference signal is minimized.

[0095] As described above, the information of the interference signal includes information about the frequency, the polarization direction, and the phase of the interference signal, and the at least one parameter of the power signal includes the frequency, the polarization direction, or the phase of the power signal, in step S630, the control section 112 can control at least one parameter of the frequency, the polarization direction, or the phase of the power signal transmitted by the radio frequency power transmitter 110 in such a manner that the disturbance caused by the interference signal is minimized, based on the information about the frequency, the polarization direction, and the phase of the interference signal.

[0096] For example, in step S630, the control section 112 can control the frequency of the power signal transmitted by the radio frequency power transmitter 110 to a frequency band different from the frequency of the interference signal in such a manner that the disturbance of the power signal caused by the interference signal is minimized. Here, changing, adjusting, and controlling the frequency means frequency hopping.

[0097] As another example, in step S630, the control section 112 can control the polarization direction of the power signal transmitted by the radio frequency power transmitter 110 to a polarization direction orthogonal to the polarization direction of the interference signal in such a manner that the disturbance of the power signal caused by the interference signal is minimized.

[0098] As another example, in step S630, the control section 112 can control the phase of the power signal transmitted by the radio frequency power transmitter 110 to a phase orthogonal to or the same as the phase of the interference signal in such a manner that the disturbance of the power signal caused by the interference signal is minimized.

[0099] In this case, in the step S630, the control unit 112 can sequentially control the frequency, the polarization direction, and the phase in order while controlling the frequency, the polarization direction, or the phase of the power signal. For example, according to the information of the interference signal, when the interference signal interferes with or will interfere with the power signal transmitted by the radio frequency power transmitter 110, the control unit 112 changes and adjusts the frequency of the power signal and then transmits to the at least one radio frequency power receiver 130. Even if the frequency of the power signal is controlled, when the interference signal still interferes with or will interfere with the power signal, the control unit 112 changes and adjusts the frequency and the polarization direction and the phase of the power signal and then transmits to the at least one radio frequency power receiver 130.

[0100] Also, as described above, the information of the interference signal includes information about the duty cycle, the beam sharpness, and the beam shape of the interference signal, and the at least one parameter of the power signal includes the duty cycle, the beam sharpness, or the beam shape of the power signal, and in the step S630, the control unit 112 can control at least one parameter of the duty cycle, the beam sharpness, or the beam shape of the power signal transmitted by the radio frequency power transmitter 110 in a manner that minimizes the interference caused by the interference signal based on the information about the duty cycle, the beam sharpness, and the beam shape of the interference signal.

[0101] Also, in the step S630, the control unit 112 further considers the reception characteristic information of the at least one radio frequency power receiver 130 and controls at least one parameter of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal in a manner that secures the power reception performance of the at least one radio frequency power receiver 130.

[0102] For example, the control unit 112 can further control at least one parameter of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal transmitted by the radio frequency power transmitter 110 based on information about the reception frequency, the reception polarization direction, the reception phase, the reception duty cycle, the reception beam sharpness, and the reception beam shape of the at least one radio frequency power receiver 130.

[0103] That is, in the step S630, the control unit 112 controls at least one parameter of the frequency, the polarization direction, the phase, the duty cycle, the beam sharpness, or the beam shape of the power signal transmitted by the radio frequency power transmitter 110 while considering the interference frequency, the interference polarization direction, the interference phase, the interference duty cycle, the interference beam sharpness, the interference beam shape of the interference signal and the reception frequency, the reception polarization direction, the reception phase, the reception duty cycle, the reception beam sharpness, and the reception beam shape of the at least one radio frequency power receiver 130 in a manner that minimizes the interference caused by the interference signal and maximizes the power reception efficiency in the at least one radio frequency power receiver 130.

[0104] And, in step S630, the control section 112 can dynamically adjust the level of the power signal based on the information of the interference signal and the charging state of the at least one radio frequency power receiver 130.

[0105] And, in step S630, the control section 112 predicts the future interference occurring due to the interference signal using an interference prediction model that is learned in advance based on past interference patterns and control results, and preferentially controls at least one parameter of the power signal based on the predicted interference.

[0106] And, in step S630, the control section 112 can control at least one parameter of the power signal individually for the plurality of radio frequency power receivers based on the position information and the reception characteristic information of the plurality of radio frequency power receivers in an environment where the plurality of radio frequency power receivers are located.

[0107] After performing step S630, the control section 112 can repeatedly perform step S620 to determine whether interference occurs in the transmission of the power signal in the radio frequency power transmitter 110. When it is determined that interference still occurs, the control section 112 can also repeatedly perform step S630. That is, the control section 112 can repeatedly determine whether interference occurs and control the parameters until interference does not occur.

[0108] The power signal related parameter control of the control section 112 in step S630 described above can be performed before the radio frequency power transmitter 110 operates or can be performed during the operation of the radio frequency power transmitter 110.

[0109] For example, the control section 112, after performing the power signal related parameter control of step S630, starts transmitting the power signal whose parameters are controlled, before transmitting the power signal.

[0110] As another example, the control section 112, during the transmission of the power signal, performs the power signal related parameter control of step S630, whereby the transmitted power signal can be converted into a power signal whose parameters are controlled in real time and continuously transmitted.

[0111] By Figure 7 The radio frequency power transmission method in which the power signal related parameter control of the radio frequency power transmitter 110 in the described step S630 is performed during the transmission of the power signal by the radio frequency power transmitter 110 is shown in detail.

[0112] In step S640, the transmission section can transmit the power signal whose parameters are controlled to the at least one radio frequency power receiver.

[0113] Figure 7 FIG. 1 is a diagram for explaining a radio frequency wireless power transmission method according to an embodiment of the present application.

[0114] First, it is assumed that the first radio frequency wireless power transmitter 110 and the second radio frequency wireless power transmitter 120 each transmit a power signal at a frequency f1, a polarization direction E1, and a phase p1.

[0115] In this case, the power signal transmitted by the first radio frequency wireless power transmitter 110 can interfere with the power signal transmitted by the second radio frequency wireless power transmitter 120 as an interference signal, and the power signal transmitted by the second radio frequency wireless power transmitter 120 can interfere with the power signal transmitted by the first radio frequency wireless power transmitter 110 as an interference signal.

[0116] In this case, after the first radio frequency wireless power transmitter 110 detects the power signal of the second radio frequency wireless power transmitter 120 as an interference signal, it can change and adjust the frequency of the power signal transmitted by the first radio frequency wireless power transmitter 110.

[0117] Even if the frequency of the power signal transmitted by the first radio frequency wireless power transmitter 110 is changed and adjusted, if the interference signal as the power signal of the second radio frequency wireless power transmitter 120 continues to interfere, the first radio frequency wireless power transmitter 110 can change the polarization direction or the phase of the power signal.

[0118] In this case, the first radio frequency wireless power transmitter 110 can confirm the reception efficiency in the at least one radio frequency wireless power receiver 130 caused by the change in the polarization direction or the phase of the power signal. When the reception efficiency in the at least one radio frequency wireless power receiver 130 is not guaranteed, the first radio frequency wireless power transmitter 110 can re-change and adjust at least one of the frequency, the polarization direction, or the phase of the power signal.

[0119] The above describes that only the first radio frequency wireless power transmitter 110 controls the frequency, the polarization direction, or the phase of the power signal, but is not limited or restricted thereto, and the second radio frequency wireless power transmitter 120 also controls the frequency, the polarization direction, or the phase of the power signal by the same principle.

[0120] As described above, although the embodiments are described through the defined embodiments and drawings, as long as a person of ordinary skill in the corresponding technical field, various modifications and changes can be made from the described recitations. For example, the described technology can be performed in a different order from the described method, and / or the described system, structure, device, circuit, etc. structural elements can be combined or combined in a different form from the described method, or even if replaced or substituted by other structural elements or equivalent technical solutions, a proper result can be achieved.

[0121] Therefore, the matters identical with other examples, other embodiments, and the scope of the invention claimed are also within the scope of the invention claimed later.

Claims

1. A wireless power transmitter, comprising a wireless charging system, characterized in that, include: The transmitting unit transmits power signals to at least one wireless power receiver; The detection department acquires information related to interference signals from other wireless power transmitters; as well as The control unit controls at least one parameter of the power signal based on information from the interference signal.

2. The wireless power transmitter according to claim 1, characterized in that, The control unit controls at least one parameter of the power signal transmitted from the wireless power transmitter in order to minimize interference caused by the interference signal, which is a power signal transmitted from the other wireless power transmitter.

3. The wireless power transmitter according to claim 2, characterized in that, The control unit controls at least one parameter of the frequency, polarization direction, or phase of the power signal transmitted from the wireless power transmitter based on information related to the frequency, polarization direction, and phase of the interference signal.

4. The wireless power transmitter according to claim 3, characterized in that, The control unit controls the frequency of the power signal transmitted from the wireless power transmitter to be in a frequency band different from that of the interference signal, or controls the polarization direction of the power signal transmitted from the wireless power transmitter to be orthogonal to the polarization direction of the interference signal, or controls the phase of the power signal transmitted from the wireless power transmitter to be orthogonal to or the same as the phase of the interference signal.

5. The wireless power transmitter according to claim 2, characterized in that, The control unit controls at least one parameter of the duty cycle, beam sharpness, or beam shape of the power signal transmitted from the wireless power transmitter based on information related to the duty cycle, beam sharpness, and beam shape of the interference signal.

6. The wireless power transmitter according to claim 1, characterized in that, The control unit also controls at least one parameter of the power signal based on the reception characteristic information of the at least one wireless power receiver.

7. The wireless power transmitter according to claim 1, characterized in that, The control unit uses an interference prediction model, which has been learned based on past interference patterns and control results, to predict future interference caused by the interference signal, and prioritizes the control of at least one parameter of the power signal based on the predicted interference.

8. The wireless power transmitter according to claim 1, characterized in that, In an environment where multiple wireless power receivers are located, the control unit controls at least one parameter of the power signal individually based on the location information and reception characteristics of each of the multiple wireless power receivers.

9. The wireless power transmitter according to claim 1, characterized in that, The control unit dynamically adjusts the level of the power signal based on the information of the interference signal and the charging status of the at least one wireless power receiver.

10. The wireless power transmitter according to claim 1, characterized in that, The wireless power transmitter, designed to transmit the power signal only to an authorized wireless power receiver, includes encrypted authentication information in the power signal during transmission.

11. The wireless power transmitter according to claim 1, characterized in that, The wireless power transmitter includes: A digital signal processor for controlling at least one parameter of the power signal; and The phase-arranged antenna is controlled by the digital signal processor.

12. A wireless power transmission method using a wireless power transmitter, the wireless power transmitter comprising a wireless charging system, characterized in that, include: The acquisition step involves obtaining information related to interference signals from other wireless power transmitters; The control step involves controlling at least one parameter of the power signal based on information from the interference signal. as well as The transmission step involves transmitting a power signal, in which the parameters are controlled, to at least one wireless power receiver.

13. The wireless power transmission method of the wireless power transmitter according to claim 12, characterized in that, The control step involves controlling at least one parameter of the power signal transmitted from the wireless power transmitter in order to minimize interference caused by the interference signal, which is a power signal transmitted from the other wireless power transmitter.

14. The wireless power transmission method of the wireless power transmitter according to claim 13, characterized in that, The control steps are as follows: controlling at least one parameter of the frequency, polarization direction, or phase of the power signal transmitted from the wireless power transmitter based on information related to the frequency, polarization direction, and phase of the interference signal.

15. The wireless power transmission method of the wireless power transmitter according to claim 14, characterized in that, The control steps include one of the following steps: The frequency of the power signal transmitted from the wireless power transmitter is controlled so that it is in a frequency band different from that of the interference signal; Control the polarization direction of the power signal transmitted from the wireless power transmitter to make it orthogonal to the polarization direction of the interference signal; or The phase of the power signal transmitted from the wireless power transmitter is controlled so that it is orthogonal to or the same as the phase of the interference signal.

16. The wireless power transmission method of the wireless power transmitter according to claim 13, characterized in that, In the control step, at least one parameter of the duty cycle, beam sharpness, or beam shape of the power signal transmitted from the wireless power transmitter is controlled based on information related to the duty cycle, beam sharpness, and beam shape of the interference signal.

17. The wireless power transmission method of the wireless power transmitter according to claim 12, characterized in that, The control steps include controlling at least one parameter of the power signal based on the receiving characteristic information of the at least one wireless power receiver.

18. The wireless power transmission method of the wireless power transmitter according to claim 12, characterized in that, The acquisition step includes one of the following steps: Receive information about the interference signal from the other wireless power transmitter; or After receiving the interference signal from the other wireless power transmitter, the interference signal is analyzed to extract information about the interference signal.

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