Wireless charging device and wireless charging indicator

Abstract

The present application relates to a kind of wireless charging device and wireless charging indicator, by being placed in the alternating electromagnetic field region of wireless power transmitting end by setting wireless charging indicator, the different changes of the alternating electromagnetic field are detected by the wireless charging indicator, thereby for the state of wireless power transmitting end is prompted, so that people easily know that wireless charger state is working state or standby state, or whether normal use can be carried out etc., facilitate use, improve user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wireless charging, in particular to a wireless charging device and a wireless charging indicator. BACKGROUND

[0002] With the progress of society and the improvement of scientific and technological level, electronic products are more and more widely used in people's daily life. In recent years, more and more electronic products have the function of charging by wireless mode. The charging distance of the wireless charger is usually short, generally not more than 10mm, and the electronic product needs to be in direct contact with the charger to charge, which leads to the problem that the wireless charger needs to occupy a certain space on the desktop or the like. Some wireless chargers using magnetic resonance principle can increase the maximum charging distance to about 40mm, so that the charger can be set under the desktop, solving the problem of space occupation. However, since the charger is under the desktop, it is not easy to be seen, so how to determine whether the charger is in working state and can be used normally becomes a new problem, which brings a lot of inconvenience to people. SUMMARY

[0003] Therefore, the purpose of the embodiments of the present application is to provide a wireless charging device and a wireless charging indicator for determining whether the wireless charging device is in working state and can be used normally, which is convenient to use and improves user experience.

[0004] In one aspect, the embodiments of the present application provide a wireless charging device, which comprises: a wireless electric energy transmitting end for transmitting electric energy in a magnetic resonance manner; and a wireless charging indicator arranged in a flat plate shape and separated from the wireless electric energy transmitting end; wherein the wireless charging indicator comprises: a light emitting component; and a wireless electric energy receiving circuit adapted to the wireless electric energy transmitting end and configured to receive electric energy in a wireless manner to drive the light emitting component to emit light to prompt the state of the wireless electric energy transmitting end.

[0005] Further, the wireless electric energy transmitting end is configured to start transmitting electric energy after performing a handshake process according to a wireless charging protocol; and the wireless electric energy receiving circuit is configured to be driven by the alternating electromagnetic field of the wireless electric energy transmitting end to drive the light emitting component to emit light.

[0006] Further, the wireless electric energy receiving circuit comprises: a receiving coil; and a driving circuit connected to the receiving coil and the light emitting component, and configured to control the light emitting mode of the light emitting component according to the output voltage or output current of the receiving coil to prompt the state of the wireless electric energy transmitting end.

[0007] Further, the driving circuit is configured to control the light-emitting component to emit light in different ways to prompt the state of the wireless power transmitting end according to different output voltages or output currents of the receiving coil.

[0008] Further, the driving circuit comprises a rectifier circuit connected with the receiving coil, for converting the alternating voltage sensed by the receiving coil into direct current voltage and delivering to the light-emitting component.

[0009] Further, the driving circuit further comprises a DC-DC converter connected between the rectifier circuit and the light-emitting component, for DC-DC conversion of the power output by the rectifier circuit to provide stable direct current voltage.

[0010] Further, the driving circuit further comprises a switching device connected in series in the current path of the light-emitting component, and a logic control circuit configured to input the output voltages of the rectifier circuit and the DC-DC converter respectively, and control the switching device to be turned on or turned off to realize control of the light-emitting mode of the light-emitting component.

[0011] Further, the wireless charging indicator further comprises a housing for accommodating the wireless power receiving circuit and the light-emitting component, wherein the housing is provided with a light-transmitting hole exposing the light-emitting component, and the light-transmitting hole is arranged at the side edge of the housing away from the wireless power receiving circuit.

[0012] In another aspect, the embodiment of the present application also provides a wireless charging indicator, which comprises a light-emitting component, and a wireless power receiving circuit adapted to the wireless power transmitting end and configured to receive power in a wireless manner to drive the light-emitting component to emit light to prompt the state of the wireless power transmitting end, wherein the wireless charging indicator is arranged in a flat plate shape and separated from the wireless power transmitting end.

[0013] Further, the wireless power receiving circuit is configured to be driven by the alternating electromagnetic field of the wireless power transmitting end to drive the light-emitting component to emit light.

[0014] The wireless charging device and the wireless charging indicator of the embodiment of the present application can be placed in the alternating electromagnetic field region of the wireless power transmitting end, and the wireless charging indicator detects different changes of the alternating electromagnetic field, thereby prompting the state of the wireless power transmitting end, so that people can easily know whether the wireless charger is in a working state or a standby state, or whether it can be normally used, etc., facilitating use and improving user experience. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the present application will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 A use state diagram of the wireless charging device of the embodiment of the present application;

[0017] Figure 2 A structure diagram of the wireless charging indicator of the embodiment of the present application;

[0018] Figure 3 A structure block diagram of the wireless charging indicator of the embodiment of the present application;

[0019] Figure 4 An internal circuit structure diagram of the wireless charging indicator of the embodiment of the present application.

[0020] Legend: 1. wireless power transmitting end; 2. wireless charging indicator; 21. wireless power receiving circuit; 211. receiving coil; 212. driving circuit; 2121. rectifier circuit; 2122. DC-DC converter; 2123. logic control circuit; 2124. switching device; 22. housing; 221. light-transmitting hole; 23. light-emitting component; 3. desktop; 4. wireless power receiving end; R. resistor. DETAILED DESCRIPTION

[0021] The present application is described herein below based on the embodiments, but the present application is not limited to only these embodiments. In the following detailed description of the present application, some specific details are described in detail. The present application can be completely understood without the description of these details by those skilled in the art. In order to avoid confusion of the essence of the present application, the well-known methods, processes, procedures, elements and circuits are not described in detail.

[0022] In addition, those of ordinary skill in the art will understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0023] At the same time, it should be understood that in the following description, "circuit" refers to a conductive loop composed of at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is said to be "connected to" another element or said to be "connected between" two nodes, it can be directly coupled or connected to another element or there can be intermediate elements, and the connection between elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0024] Unless the context clearly requires otherwise, throughout the description, the terms "comprise", "comprising", "attached", "including", "including", "contain", "containing" and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0025] In the description of the present application, it should be understood that the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0026] As shown in Figure 1 and Figure 2 The wireless charging device of the embodiment of the present application comprises a wireless power transmitting end 1 and a wireless charging indicator 2. The wireless power transmitting end 1 is used to transmit power in a magnetic resonance manner. The wireless charging indicator 2 is arranged in a flat shape and is arranged separately from the wireless power transmitting end. The wireless charging indicator 2 comprises a light emitting component 23 and a wireless power receiving circuit 21. The wireless power receiving circuit 21 is adapted to the wireless power transmitting end 1 and is configured to receive power wirelessly to drive the light emitting component 23 to emit light, prompting the state of the wireless power transmitting end 1. Figure 1 is a schematic diagram of the use state of the wireless charging device of the embodiment of the present application. As shown in Figure 1 When in use, first fix the wireless power transmitting end 1 on the bottom surface of the desktop 3 at the position where you want to place it, and then fix the wireless charging indicator 2 on the top surface of the desktop at the position corresponding to the wireless power transmitting end 1. When charging is needed, place the wireless power receiving end 4 above the wireless charging indicator 2 to charge the wireless power receiving end 4. Specifically, the wireless power receiving end can be a mobile phone or other electronic device capable of wireless charging. The wireless charging indicator 2 is used to prompt the state of the wireless power transmitting end 1. Specifically, the wireless charging indicator 2 can not establish any communication connection with the wireless power transmitting end, but detects the change of the alternating electromagnetic field generated by the wireless power transmitting end 1 through the wireless power receiving circuit 21 as shown in Figure 2 , and then converts the detected alternating electromagnetic field change into current to drive the light emitting component 23 to emit light to prompt the state of the wireless power transmitting end 1. By arranging the wireless charging indicator 2 which can be placed in the alternating electromagnetic field region of the wireless power transmitting end 1, detecting different changes of the alternating electromagnetic field through the wireless charging indicator 2, prompting the state of the wireless power transmitting end 1, people can easily know the state of the wireless charger, whether it is in working state or standby state, or whether it can be used normally, etc., which is convenient for use and improves the user experience.

[0027] In the present embodiment, the wireless power transmitter 1 is configured to start transmitting power after performing a handshake procedure in compliance with a wireless charging standard protocol (e.g. Qi standard, PMA standard, A4WP standard, etc.). In one alternative implementation, the handshake procedure can be implemented as follows. In the standby state, the wireless power transmitter 1 transmits power at a low power level at a certain frequency for a short time. If a wireless power receiver 4 with handshake function (e.g. a smartphone with wireless charging function) is located in the charging area at this time, the wireless power receiver 4 will sense the wireless power transmission action, and modulate the load to cause the wireless power transmitter 1 to detect the disturbance of the output power, and based on the disturbance, start the handshake procedure with the wireless power receiver 4, exchange information, and trigger the switch to the working state, and continuously perform the wireless power transmission action at a predetermined power level. If there is no wireless power receiver 4 with handshake function located in the charging area, the wireless power transmitter 1 remains in the standby state, and periodically performs the transmission of power at a low power level to attempt detection. In the present embodiment, the wireless power receiving circuit 21 is configured not to have handshake function, i.e. it will not trigger the handshake procedure after detecting the low-power electromagnetic field transmitted by the wireless power transmitter 1 for detection, and it can only convert the alternating electromagnetic field in its sensing area into an electric current. Thus, when there is no wireless power receiver 4 with handshake function placed in the charging area of the wireless power transmitter 1, the wireless power receiving circuit 21 cannot drive the light-emitting component 23 to emit light due to the low voltage generated by the induced alternating electromagnetic field. When a wireless power receiver 4 with handshake function or other chargeable device enters the charging area, the wireless power transmitter 1 is triggered to enter the working state, and then the transmission power of the wireless power transmitter 1 increases, the strength of the alternating electromagnetic field increases, and the voltage and / or current generated by the wireless power receiving circuit 21 based on the alternating electromagnetic field also increases, so that the light-emitting component 23 can be driven to emit light. By such arrangement, the light-emitting component 23 of the wireless charging indicator 2 can be constantly off in the standby state, and constantly on in the charging state, thereby prompting the status of the wireless charger.

[0028] In some embodiments, the wireless power transmitter 1 is configured to intermittently transmit power at a high power level when a fault occurs, so that the wireless power receiving circuit 21 can intermittently drive the light-emitting component 23 to emit light. Thus, the wireless charger can be prompted by the wireless charging indicator 2 presenting a flashing state of the light-emitting component 23.

[0029] Figure 2 The structure of the wireless charging indicator of the present embodiment is shown in the following schematic diagram: Figure 2As shown, in a specific embodiment, the wireless power receiving circuit 21 comprises a receiving coil 211 and a driving circuit 212. The driving circuit 212 is connected to the receiving coil 211 and the light emitting component 23, and is configured to control the light emitting mode of the light emitting component 23 according to the output voltage or output current of the receiving coil 211, so as to prompt the state of the wireless transmitter. The receiving coil 211 can receive the power transmitted by the wireless transmitting end 1, and then transmit the power to the driving circuit 212, which drives the light emitting component 23 to emit light or not to emit light according to the size of the power received by the receiving coil 211.

[0030] Specifically, the driving circuit 212 is configured to control the light emitting component 23 to emit light in different modes according to the different output voltage or output current of the receiving coil 211, so as to prompt the state of the wireless transmitter. For example, the light emitting component 23 does not emit light, indicating that the wireless transmitter is in an available standby state; the light emitting component 23 is always on, indicating that the wireless transmitter is charging the device; and the light emitting component 23 flashes, indicating that the wireless transmitter is malfunctioning and cannot be normally used.

[0031] Figure 3 The structural block diagram of the wireless charging indicator of the embodiment of the present application is shown in FIG. 2. Figure 3 In an alternative implementation, the driving circuit 212 comprises a rectifier circuit 2121. The rectifier circuit 2121 is connected to the receiving coil 211, and is configured to convert the alternating voltage sensed by the receiving coil 211 into direct current voltage and transmit the direct current voltage to the light emitting component 23. Since wireless charging is realized based on alternating electromagnetic field, the power transmitted by the wireless transmitting end 1 and the power received by the receiving coil 211 are alternating current, while the light emitting component 23 needs to use direct current to work normally. Therefore, the rectifier circuit 2121 is configured to convert the alternating voltage sensed by the receiving coil 211 into direct current voltage and transmit the direct current voltage to the light emitting component 23, so as to ensure that the light emitting component 23 can work normally. Specifically, the rectifier circuit 2121 can be a full-wave rectifier, a half-wave rectifier or a voltage doubler rectifier circuit.

[0032] In some alternative implementations, the driving circuit 212 further comprises a DC-DC converter 2122. The DC-DC converter 2122 is connected between the rectifier circuit 2121 and the light emitting component 23, and is configured to perform DC-DC conversion on the power output by the rectifier circuit 2121, so as to provide stable direct current voltage or current. The DC-DC converter 2122 is a low-dropout linear regulator or a DC-DC converter comprising a DC-DC step-down circuit. Since the current and voltage output by the rectifier circuit 2121 are not stable enough, they are likely to cause damage to the light emitting component 23 in use. Therefore, the DC-DC converter is configured as a voltage stabilizing circuit to convert the unstable voltage output by the rectifier circuit 2121 into a constant voltage and provide the constant voltage to the light emitting component 23.

[0033] In one optional implementation, the driving circuit 212 further includes a switching device 2124 and a logic control circuit 2123. The switching device 2124 is connected in series in the current path of the light-emitting component 23; the logic control circuit 2123 is configured to receive the output voltages of the rectifier circuit 2121 and the DC-DC converter 2122 respectively, controlling the switching device 2124 to turn on or off, thereby controlling the light-emitting mode of the light-emitting component 23. The switching device 2124 is used to control the opening or closing of the light-emitting component 23, and the logic control circuit 2123 is a comparator circuit or a microcontroller circuit. The logic control circuit 2123 receives the output voltages of the rectifier circuit 2121 and the DC-DC converter 2122 respectively, and then compares the two. When the output voltage of the rectifier circuit 2121 is less than the output voltage of the DC-DC converter 2122, the logic control circuit 2123 outputs signal A, which turns off the switching device 2124, thus preventing the light-emitting component 23 from emitting light; when the output voltage of the rectifier circuit 2121 is greater than the output voltage of the DC-DC converter 2122, the logic control circuit 2123 outputs signal B, which turns on the switching device 2124, thus making the light-emitting component 23 emit light.

[0034] Figure 4 This is a schematic diagram of the internal circuit structure of the wireless charging indicator according to an embodiment of the present invention, as shown below. Figure 4 As shown, in one specific embodiment, the rectifier circuit 2121 is a voltage doubler rectifier circuit, the DC-DC converter 2122 is a low-dropout linear regulator, and the logic control circuit 2123 is a comparator circuit. The comparator chip receives the output voltages of the rectifier circuit 2121 and the DC-DC converter 2122 as inputs, compares them, and outputs the comparison result as signal A or signal B to the switching device 2124 to control whether the light-emitting component 23 emits light. A resistor R is connected in series between the light-emitting component 23 and the DC-DC converter 2122 to protect the light-emitting component 23 from damage due to overload. Specifically, in this embodiment, the light-emitting component 23 is a light-emitting diode (LED).

[0035] like Figure 1 As shown, the wireless charging indicator 2 also includes a housing 22. The housing 22 houses the wireless power receiving circuit 21 and the light-emitting component 23. The housing 22 has a light-transmitting hole 221 that exposes the light-emitting component 23, located on the side of the housing 22 away from the wireless power receiving circuit 21. In use, the housing 22 is simply fixed to the upper surface of the tabletop 3 at the position corresponding to the wireless power transmitting end 1, making installation and use convenient. The light-transmitting hole 221 allows observation of whether the light-emitting component is emitting light, making it easy to determine the status of the wireless charging device and further enhancing its convenience.

[0036] The wireless charging indicator of the embodiment of the present application can be used in cooperation with the wireless charging device to prompt whether the wireless charging device is in the charging state and whether it can be normally used, which comprises a light emitting component 23 and a wireless power receiving circuit 21. The wireless power receiving circuit 21 is adapted to the wireless power transmitting end 1 and is configured to receive power in a wireless manner to drive the light emitting component 23 to emit light to prompt the state of the wireless transmitter. Specifically, the wireless charging indicator 2 is set to be flat and is separated from the wireless power transmitting end 1. The wireless charging indicator 2 is set to be flat so that it can be laid on the desktop and does not occupy too much space and does not affect the placement of the articles on the desktop.

[0037] The wireless power receiving circuit 21 is configured to passively induct the alternating electromagnetic field transmitted by the wireless power transmitting end, i.e. as described above, only can convert the alternating electromagnetic field in the inductive area into current, and then determines whether to drive the light emitting component 23 to emit light according to the current size. The state of the wireless charger is prompted so that the user can easily know whether the wireless charger can be normally used, and the convenience of using the wireless charging device is improved.

[0038] The above description is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wireless charging device, characterized by, The device comprises: a wireless power transmitting end; a wireless charging indicator arranged in a flat shape and separated from the wireless power transmitting end; wherein the wireless charging indicator comprises: a light emitting component; and a wireless power receiving circuit adapted to the wireless power transmitting end and configured to receive power wirelessly to drive the light emitting component to emit light to prompt the status of the wireless power transmitting end; wherein the wireless power transmitting end is configured to start transmitting power after performing a handshake process according to a wireless charging protocol; the wireless power receiving circuit is configured to be driven by the alternating electromagnetic field of the wireless power transmitting end to drive the light emitting component to emit light; wherein the wireless charging indicator does not establish a communication connection with the wireless power transmitting end; wherein the wireless power receiving circuit comprises: a receiving coil; and a driving circuit connected to the receiving coil and the light emitting component and configured to control the light emitting mode of the light emitting component according to the output voltage or output current of the receiving coil to prompt the status of the wireless power transmitting end; the receiving coil is configured to receive power transmitted by the wireless transmitting end and transmit the power to the driving circuit; wherein the driving circuit drives the light emitting component according to the size of the power received by the receiving coil; the wireless power receiving circuit is further configured to: control the light emitting component not to emit light in response to the wireless transmitter being in an available standby state; control the light emitting component to emit light constantly in response to the wireless transmitter being in a charging state; control the light emitting component to flash in response to the wireless transmitter being in a failure state.

2. The apparatus of claim 1, wherein, the driving circuit is configured to control the light emitting component to emit light in different modes according to the output voltage or output current of the receiving coil to prompt the status of the wireless power transmitting end.

3. The apparatus of claim 2, wherein, the driving circuit comprises: a rectifier circuit connected to the receiving coil and configured to convert the alternating voltage induced by the receiving coil into direct current voltage and transmit the direct current voltage to the light emitting component.

4. The apparatus of claim 3, wherein, the driving circuit further comprises: a DC-DC converter connected between the rectifier circuit and the light emitting component and configured to perform DC-DC conversion on the power output by the rectifier circuit to provide stable direct current voltage.

5. The apparatus of claim 4, wherein, the driving circuit further comprises: a switching device connected in series to the current path of the light emitting component; and a logic control circuit configured to input the output voltage of the rectifier circuit and the DC-DC converter respectively and control the switching device to be turned on or turned off to realize control over the light emitting mode of the light emitting component.

6. The apparatus of claim 1, wherein, the wireless charging indicator further comprises: a housing for accommodating the wireless power receiving circuit and the light emitting component; wherein the housing is provided with a light transmission hole exposing the light emitting component, and the light transmission hole is arranged on the side edge of the housing away from the wireless power receiving circuit.

7. A wireless charging indicator, comprising: the indicator comprises: a light emitting component; and a wireless power receiving circuit adapted to the wireless power transmitting end and configured to receive power wirelessly to drive the light emitting component to emit light to prompt the status of the wireless power transmitting end; The wireless charging indicator is in a flat shape and separated from the wireless power transmitting end; The wireless power transmitting end is configured to start transmitting power after performing a handshake process according to a wireless charging protocol; The wireless power receiving circuit is configured to drive the light emitting component to emit light passively in response to an alternating electromagnetic field generated by the wireless power transmitting end; The wireless charging indicator is not connected to the wireless power transmitting end; The wireless power receiving circuit includes: a receiving coil; and a driving circuit connected to the receiving coil and the light emitting component, configured to control the light emitting mode of the light emitting component according to the output voltage or output current of the receiving coil, so as to indicate the status of the wireless power transmitting end; The receiving coil is configured to receive power transmitted by the wireless transmitting end and transmit the power to the driving circuit; The driving circuit drives the light emitting component according to the size of the power received by the receiving coil; The wireless power receiving circuit is further configured to: control the light emitting component to not emit light in response to the wireless transmitter being in an available standby state; control the light emitting component to emit light constantly in response to the wireless transmitter being in use to charge the device; control the light emitting component to flash in response to the wireless transmitter being in failure so as to be unable to be normally used.

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