Description:TECHNICAL FIELD
[001] The present invention relates generally to a system and method for wirelessly charged user device.
BACKGROUND
[002] Wireless charging is particularly important for fast wireless charging of devices including smartphones, tablets and laptops. Wireless power transmission may come in various types, such as magnetic induction, magnetic resonance, and electromagnetic waves, among which the electromagnetic wave type may advantageously work for remote power transmission as compared with the others. Wireless charging or inductive charging uses a magnetic field to transfer energy between two devices. Wireless charging can be implemented at a charging station. Energy is sent from one device to another device through an inductive coupling. The inductive coupling is used to charge batteries or run the receiving device. The wireless power transfer technique may provide more outstanding mobility, convenience, and safety as compared to the conventional wired charging environment, which uses a wired charging connector.
[003] There is a need for improved wireless charging systems to extend the active charging area and to improve coupling and charging uniformity while avoiding disruption of nearby devices that may be damaged by the generated magnetic field.
[004] Therefore, there is a need of a system which overcomes the aforementioned problems.

SUMMARY
[005] Embodiments of the present disclosure present technological improvements as solutions to one or more of the above-mentioned technical problems.
[006] Before the present subject matter relating to a system and method for wirelessly charged user device, it is to be understood that this application is not limited to the particular system described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the implementations or versions or embodiments only and is not intended to limit the scope of the present subject matter.
[007] This summary is provided to introduce aspects related to a system and method for wirelessly charged user device. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the present subject matter.
[008] In an embodiment, a system for wirelessly charged user device, the system includes a charging station, a user device and a communication module. The charging station is configured to generate a charging field. The user device includes a wireless charging receiver configured to receive power from the charging field. The communication module within the charging station and the user device, enabling bidirectional communication to facilitate power transfer control.
[009] In another embodiment, a method for wirelessly charged user device, the method includes the step of generating a charging field from a charging station. The method includes the step of identifying a user device within the charging field. The method includes the step of establishing bidirectional communication between the charging station and the user device. The method includes the step of dynamically adjusting the power output of the charging field based on feedback received from the user device.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0010] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure; however, the disclosure is not limited to the specific system or method disclosed in the document and the drawings.
[0011] The present disclosure is described in detail with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer various features of the present subject matter.
[0012] Figure 1 illustrates a wireless power transmission system according to an embodiment of the disclosure.
[0013] Figure 2 illustrates the timing of multiplexed NFC polling and A4WP charging according to one embodiment of the disclosure.
[0014] Figure 3 illustrates a block diagram of a wireless power transfer system according to another exemplary embodiment of the present disclosure.
[0015] In the above accompanying drawings, a non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
[0016] Further, the figures depict various embodiments of the present subject matter for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the present subject matter described herein.
DETAILED DESCRIPTION
[0017] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although a system and method for wirelessly charged user device, similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, a system and method for wirelessly charged user device is now described.
[0018] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. For example, although the present disclosure will be described in the context of a system and method for wirelessly charged user device, one of ordinary skill in the art will readily recognize a system and method for wirelessly charged user device can be utilized in any situation. Thus, the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein.
[0019] In an embodiment, a system for wirelessly charged user device, the system includes a charging station, a user device and a communication module. The charging station is configured to generate a charging field. The user device includes a wireless charging receiver configured to receive power from the charging field. The communication module within the charging station and the user device, enabling bidirectional communication to facilitate power transfer control.
[0020] In another implementation, a Near-Field Communication (NFC) reader to supply an NFC detectable signal to the multiplexer and to identify an NFC response received at the resonator coil.
[0021] In another implementation, the charging station further includes a power management unit for dynamically adjusting the power output of the charging field based on feedback from the user device.
[0022] In another implementation, the charging station is equipped with a positioning system to optimize the alignment between the charging field and the wireless charging receiver of the user device.
[0023] In another implementation, a power converter is configured to transmit the wireless power to the wireless power receiver by magnetic coupling with the wireless power receiver at an operating frequency.
[0024] In another implementation, the controller continually detects the NFC signal while the resonator coil generates the A4WP magnetic field to charge an external device.
[0025] In another embodiment, a method for wirelessly charged user device, the method includes the step of generating a charging field from a charging station. The method includes the step of identifying a user device within the charging field. The method includes the step of establishing bidirectional communication between the charging station and the user device. The method includes the step of dynamically adjusting the power output of the charging field based on feedback received from the user device.
[0026] In another implementation, the method includes the step of utilizing a positioning system to optimize the alignment between the charging field and the wireless charging receiver of the user device.
[0027] In another implementation, the method includes the step of detecting load modulation at the wireless charging station.
[0028] In another implementation, the method includes the step of obtaining the target data and storing the same in a memory.
[0029] Figure 1 illustrates a wireless power transmission system according to an embodiment of the disclosure.
[0030] In an embodiment, wireless power transmitter 100 may wirelessly transmit power to at least one electronic device 150 or 160. As used herein, “wireless power transmitter 100 or electronic device 150 performs a particular operation” may mean, e.g., that a processor included in the wireless power transmitter 100 or electronic device 150 performs a particular operation or controls other hardware to perform a particular operation. As used herein, “wireless power transmitter 100 or electronic device 150 performs a particular operation” may mean, e.g., that a processor performs a particular operation or controls other hardware to perform a particular operation as per execution of at least one command stored in a memory included in the wireless power transmitter 100 or electronic device 150. According to an embodiment of the disclosure, the wireless power transmitter 100 may include a plurality of patch antennas 111 to 126. The patch antennas 111 to 126 are not limited as long as they each are an antenna capable of producing RF waves. At least one of the amplitude and phase of RF waves produced by the patch antennas 111 to 126 may be adjusted by the wireless power transmitter 100.
[0031] The wireless power transmitter 100 may adjust at least one of the amplitude or phase of each of the sub-RF waves generated by the patch antennas so that the sub-RF waves may constructively interfere with one another at a first point (x1, y1, z1). The wireless power transmitter 100 may detect that the electronic device 160 is positioned at the second point (x2, y2, z2). The wireless power transmitter 100 may control the patch antennas so that the sub-RF waves may constructively interfere with one another at the second point (x2, y2, z2) in order to charge the electronic device 160. Hence, a RF wave formed by the sub-RF waves may have the maximum amplitude at the second point (x2, y2, z2), and thus, the electronic device may receive power at a higher efficiency.
[0032] The wireless power transmitter may determine the position of the electronic devices and and enable the sub-RF waves to constructively interfere with one another at the determined position, allowing for wireless charging at a higher transmission efficiency.
[0033] Figure 2 illustrates the timing of multiplexed NFC polling and A4WP charging according to one embodiment of the disclosure.
[0034] In an embodiment, an NFC polling session is added between beacon intervals. The NFC polling may be implemented after short beacon, long beacon or both. In one embodiment, the NFC polling is implemented during power save state. If a short beacon detects load variation which indicates PRU presence, then NFC polling may be postponed until after long beacon 240. Thus, the NFC polling is periodically administrated during power save state 210.
[0035] The controller may comprise a processor circuitry in communication with a memory circuitry. The processor may comprise hardware, software or a combination of hardware and software. Similarly, the memory may include hardware, software or a combination of hardware and software. The memory may store instructions which may be executed on the processor circuitry to, for example, initiate short beacon 230, detect a proximal device by way of load detection, initiate long beacon 240 as needed and/or imitate NFC polling 250 during available time slots of power save state 210. In an embodiment, a power transmission unit (PTU), comprising: a controller having a processor circuitry and a memory circuitry; a power amplifier for receiving an input to generate an amplified output; a resonator coil in communication with the power amplifier, the resonator coil configured to generate an A4WP magnetic charging field and a secondary signal; and a multiplexer in communication with the power amplifier and the resonator coil.
[0036] Figure 3 illustrates a block diagram of a wireless power transfer system according to another exemplary embodiment of the present disclosure.
[0037] In an embodiment, the wireless power transfer system (10) includes a mobile device (450), which wirelessly receives power, and a base station (400), which wirelessly transmits power. The wireless power transmitter (100) may transmit induction power or resonance power and may control the transmission. The wireless power transmitter (100) may include a power conversion unit (110) converting electric energy to a power signal by generating a magnetic field through a primary coil (or primary coils), and a communications & control unit (120) controlling the communication and power transfer between the wireless power receiver (200) in order to transfer power at an appropriate (or suitable) level. The system unit (405) may perform input power provisioning, controlling of multiple wireless power transmitters, and other operation controls of the base station (400), such as user interface control.
[0038] In the magnetic induction method, a primary coil and a secondary coil may have randomly appropriate shapes. For example, the primary coil and the secondary coil may correspond to copper wire being wound around a high-permeability formation, such as ferrite or a non-crystalline metal. The primary coil may also be referred to as a transmitting coil, a primary core, a primary winding, a primary loop antenna, and so on. Meanwhile, the secondary coil may also be referred to as a receiving coil, a secondary core, a secondary winding, a secondary loop antenna, a pickup antenna, and so on. The communications & control unit (120) may transmit and/or receive information to and from the wireless power receiver (200). The communications & control unit (120) may include at least one of an IB communication module and an OB communication module. The communications & control unit (120) may load information in the magnetic wave or may interpret the information that is carried by the magnetic wave by using a modulation scheme, such as binary phase shift keying (BPSK), Frequency Shift Keying (FSK) or amplitude shift keying (ASK), and so on, or a coding scheme, such as Manchester coding or non-return-to-zero level (NZR-L) coding, and so on
[0039] Although the description provides implementations of a system and method for wirelessly charged user device, it is to be understood that the above descriptions are not necessarily limited to the specific features or methods or systems. Rather, the specific features and methods are disclosed as examples of implementations for a system and method for wirelessly charged user device.
, Claims:We claim:
1. A system for wirelessly charged user device, comprising:
a charging station configured to generate a charging field;
a user device comprising a wireless charging receiver configured to receive power from the charging field; and
a communication module within the charging station and the user device, enabling bidirectional communication to facilitate power transfer control.
2. The system as claimed in claim 1, further comprising a Near-Field Communication (NFC) reader to supply an NFC detectable signal to the multiplexer and to identify an NFC response received at the resonator coil.
3. The system as claimed in claim 1, wherein the charging station further comprises a power management unit for dynamically adjusting the power output of the charging field based on feedback from the user device.
4. The system as claimed in claim 1, wherein the charging station is equipped with a positioning system to optimize the alignment between the charging field and the wireless charging receiver of the user device.
5. The system as claimed in claim 1, further comprising a power converter configured to transmit the wireless power to the wireless power receiver by magnetic coupling with the wireless power receiver at an operating frequency.
6. The system as claimed in claim 1, wherein the controller continually detects the NFC signal while the resonator coil generates the A4WP magnetic field to charge an external device.
7. A method for wirelessly charged user device, comprising:
generating a charging field from a charging station;
identifying a user device within the charging field;
establishing bidirectional communication between the charging station and the user device; and
dynamically adjusting the power output of the charging field based on feedback received from the user device.
8. The method as claimed in claim 7, further comprising utilizing a positioning system to optimize the alignment between the charging field and the wireless charging receiver of the user device.
9. The method as claimed in claim 7, wherein the step of detecting load modulation at the wireless charging station.
10. The method as claimed in claim 7, wherein the step of obtaining the target data and storing the same in a memory.