Wireless energy supply device

Abstract

The utility model discloses a wireless energy supply device, which comprises a receiving coil, a wireless power supply digital control system and an electroluminescent device, two pins of the receiving coil are electrically connected with the wireless power supply digital control system, and the electroluminescent device is electrically connected with the wireless power supply digital control system; wherein the receiving coil is used for receiving a wireless signal sent by a transmitting end and converting the wireless signal into low-voltage alternating current, a rectifier in the wireless power supply digital control system converts the low-voltage alternating current into direct current, and a digital controller can adaptively adjust current and voltage in the electric energy transmission process to provide stable electric energy transmission for an electroluminescent device. Therefore, the wireless energy supply for the electroluminescent device is realized, and the applicability and expansibility of the wireless energy supply technology are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless power supply, in particular to a wireless power supply device. BACKGROUND

[0002] Wireless power supply is a technology for realizing wireless transmission of electric energy through electromagnetic induction or electromagnetic resonance, and can supply power to the receiving end through the transmitting end without physical connection between the transmitting end and the receiving end.

[0003] At present, wireless power supply technology is mainly applied to the charging scene of consumer electronic devices such as smart bracelets, Bluetooth earphones and other devices. These devices are built-in with complex receiving coils and wireless power supply connection chip integrated circuits, which can establish a stable electric energy transmission link between the transmitting end and the receiving end.

[0004] However, the existing wireless power supply technology is difficult to transmit electric energy to light-emitting devices without receiving coils and wireless power supply connection chips. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides a wireless power supply device which can wirelessly supply power to light-emitting devices without receiving coils and wireless power supply connection chips.

[0006] To solve the above problems, the technical scheme provided by the present application is as follows:

[0007] The utility model provides a wireless power supply device, including receiving coil, wireless power supply digital control system and electroluminescent device:

[0008] Two pins of the receiving coil are electrically connected to the wireless power supply digital control system, and the electroluminescent device is electrically connected to the wireless power supply digital control system.

[0009] Among them, the receiving coil is used for receiving the wireless signal and converting it into low-voltage alternating current, the wireless power supply digital control system includes a rectifier and a digital controller, the rectifier is used for converting the low-voltage alternating current into direct current, the digital controller is used for managing the electric energy transmission process, and the electroluminescent device is used for converting electric energy into light energy.

[0010] In a possible implementation manner, the device further comprises a light-emitting device dimming driving system:

[0011] The light-emitting device dimming driving system comprises a microprocessor and a switching element, and the light-emitting device dimming driving system is arranged on the connection line between the wireless power supply digital control system and the electroluminescent device.

[0012] The microprocessor is configured to send a logic control signal, and the switch element is configured to control the brightness of the electroluminescent device according to the logic control signal.

[0013] In a possible implementation, the device further comprises a capacitor.

[0014] The capacitor is arranged on a connection line between the receiving coil and the wireless power supply digital control system, and is configured to match the impedance between the wireless signal and the receiving coil.

[0015] In a possible implementation, the wireless power supply digital control system further comprises a protection circuit configured to provide overcurrent, overvoltage or overtemperature protection.

[0016] In a possible implementation, the electroluminescent device is an alternating current electroluminescent device, and the light-emitting device dimming driving system further comprises an inverter configured to convert the direct current into alternating current.

[0017] In a possible implementation, the device further comprises a resistor arranged on a pin of the electroluminescent device, and configured to perform noise control.

[0018] In a possible implementation, the inductance of the receiving coil is 10-30 mu H.

[0019] In a possible implementation, the capacitance of the capacitor is 3.3 nF.

[0020] As can be seen from the above technical solutions, the wireless power supply device provided by the present application has the following advantages: the two pins of the receiving coil are electrically connected to the wireless power supply digital control system, and the electroluminescent device is electrically connected to the wireless power supply digital control system, wherein the receiving coil can receive a wireless signal and convert it into low-voltage alternating current, the rectifier in the wireless power supply digital control system can convert the low-voltage alternating current into direct current, and the digital controller can manage the power transmission process, so that the electroluminescent device can convert the electric energy into light energy, thereby realizing wireless power supply for the electroluminescent device, ensuring the stability of the electric energy in the wireless power supply process, and improving the applicability and expansibility of the wireless power supply technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1A structural schematic diagram of a wireless energy supply device provided by an embodiment of the present application;

[0023] Figure 2 A structural schematic diagram of another wireless energy supply device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the field without creative labor fall within the scope of protection of the present application.

[0025] In the embodiments of the present application, a transmitting end needs to provide wireless signals for the wireless energy supply device, the transmitting end needs to have a reverse wireless charging function, and can be a smart phone, a tablet computer, a palm computer, a handheld wireless communication product or a global positioning system, etc. When the transmitting end is within a certain range close to the wireless energy supply device, it can generate electromagnetic induction with the wireless energy supply device through its built-in coil, thereby transmitting wireless signals and realizing energy transmission.

[0026] Referring to Figure 1 A structural schematic diagram of a wireless energy supply device provided by an embodiment of the present application.

[0027] The wireless energy supply device comprises a receiving coil 1, a wireless power supply digital control system 2 and an electroluminescent device 3, two pins of the receiving coil 1 are electrically connected with the wireless power supply digital control system 2, and the electroluminescent device 3 is electrically connected with the wireless power supply digital control system 2.

[0028] The receiving coil 1 is used to receive wireless signals transmitted by a transmitting end and convert the wireless signals into low-voltage alternating current signals, the wireless power supply digital control system 2 comprises a rectifier 4 and a digital controller 5, wherein the rectifier is used to convert the low-voltage alternating current into direct current, and the digital controller is used to manage the energy transmission process, and the electroluminescent device is used to convert the electrical energy into light energy and emit light.

[0029] In a possible implementation, the inductance of the receiving coil is 10-30.

[0030] In the present application, the specific parameters of the receiving coil are not limited. As an example, the receiving coil can be designed as a planar spiral receiving coil, the material of which is enameled copper wire, the number of turns of which is 20, the cross-sectional area of which is 10mm 2 , the magnetic permeability of which is 4π×10 -7 H / m, and the length of which is 10cm.

[0031] The device establishes an electric energy transmission channel from the transmitting end to the electroluminescent device, and can self-adaptively adjust the current and voltage in the electric energy transmission process through the digital controller, thereby providing stable electric energy transmission for the electroluminescent device and realizing wireless energy supply for the electroluminescent device, but the brightness of the electroluminescent device cannot be controlled.

[0032] In a possible implementation, referring to Figure 2 Another wireless energy supply device provided by the embodiment of the present application is shown in a structural schematic diagram.

[0033] The wireless energy supply device comprises a receiving coil 1, a wireless power supply digital control system 2, a light emitting device light adjustment driving system 3 and an electroluminescent device 4. The wireless power supply digital control system 2 comprises a rectifier 5 and a digital controller 6. The light emitting device light adjustment driving system 3 comprises a microprocessor 7 and a switching element 8. The light emitting device light adjustment driving system 3 is electrically connected with the wireless power supply digital control system 2 and the electroluminescent device 4 respectively.

[0034] The microprocessor is configured to send a logic control signal, and the switching element is configured to control the brightness of the electroluminescent device according to the logic control signal.

[0035] When the logic control signal is at a high level, the switching element is turned on, at which time the current can be transmitted, and the light emitting device emits light. When the logic control signal is at a low level, the switching element is turned off, at which time the current cannot be transmitted, and the light emitting device does not emit light. Therefore, the brightness of the electroluminescent device can be controlled through the wireless energy supply device.

[0036] In a possible implementation, the device further comprises a capacitor:

[0037] The capacitor is arranged on a connection line between the receiving coil and the wireless power supply digital control system, and is configured to match the impedance between the wireless signal and the receiving coil.

[0038] The capacitance value of the capacitor is determined according to the inductance of the receiving coil and the working frequency when the transmitting end transmits the wireless signal, and can be selected by the following formula:

[0039]

[0040] Wherein, f is the working frequency, and L is the inductance of the receiving coil.

[0041] In the present application, the working frequency of the transmitting end needs to be determined according to the type of the transmitting end, and the inductance L of the receiving coil is calculated according to the specific parameters by the following formula:

[0042]

[0043] Wherein, μ is the magnetic permeability of the receiving coil material, N is the number of turns of the receiving coil, A is the cross-sectional area of the receiving coil, and l is the length of the receiving coil.

[0044] In the embodiments of the present application, the capacitance needs to be selected according to the actual use scene to ensure the maximum energy transmission efficiency. For example, the transmitting end is a smart phone, the working frequency range is 110KHZ to 205KHZ, the inductance of the receiving coil is designed to be 10μH, and the capacitance value for impedance matching can be obtained at the lowest working frequency. In one possible implementation manner, the capacitance value of the capacitance is 3.3nf.

[0045] Thus, impedance matching between the wireless signal and the receiving coil can be formed, and the energy transmission efficiency is maximized.

[0046] In one possible implementation manner, the wireless power digital control system further comprises a protection circuit for overcurrent, overvoltage or overtemperature protection during the power transmission.

[0047] The protection circuit, the rectifier and the digital controller are electrically connected to form a circuit and are integrated on the wireless power digital control system. The embodiments of the present application do not make any limitation on the specific electrical connection structure.

[0048] In one possible implementation manner, the electroluminescent device is an alternating current electroluminescent device, and the light-emitting device dimming driving system further comprises an inverter for converting direct current into alternating current.

[0049] The inverter, the microprocessor and the switching device are electrically connected to form a circuit and are integrated on the light-emitting device dimming driving system. The embodiments of the present application do not make any limitation on the specific electrical connection structure.

[0050] In one possible implementation manner, the wireless power supply device further comprises a resistor arranged on the pin of the electroluminescent device for noise control.

[0051] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other. For the system or device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0052] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wireless powered device, characterized in that, The device comprises a receiving coil, a wireless power digital control system and an electroluminescent device: Two pins of the receiving coil are electrically connected to the wireless power digital control system, and the electroluminescent device is electrically connected to the wireless power digital control system; The receiving coil is used to receive wireless signals and convert them into low-voltage alternating current, the wireless power digital control system comprises a rectifier and a digital controller, the rectifier is used to convert the low-voltage alternating current into direct current, the digital controller is used to manage the power transmission process, and the electroluminescent device is used to convert electrical energy into light energy.

2. The wireless powered device of claim 1, wherein, The device further comprises a light-emitting device dimming driving system: The light-emitting device dimming driving system comprises a microprocessor and a switching element, and the light-emitting device dimming driving system is arranged on the connection line between the wireless power digital control system and the electroluminescent device; The microprocessor is used to send a logic control signal, and the switching element is used to control the brightness of the electroluminescent device according to the logic control signal.

3. The wireless powered device of claim 1, wherein, The device further comprises a capacitor: The capacitor is arranged on the connection line between the receiving coil and the wireless power digital control system, and is used for impedance matching between the wireless signals and the receiving coil.

4. The wireless powered device of claim 1, wherein, The wireless power digital control system further comprises a protection circuit for overcurrent, overvoltage or overtemperature protection.

5. The wireless powered device of claim 2, wherein, The electroluminescent device is an alternating current electroluminescent device, and the light-emitting device dimming driving system further comprises an inverter for converting the direct current into alternating current.

6. The wireless powered device of claim 1, wherein, The device further comprises a resistor arranged on the pin of the electroluminescent device for noise control.

7. The wireless powered device of claim 1, wherein, The inductance of the receiving coil is 10-30μH.

8. The wireless powered device of claim 3, wherein, The capacitance of the capacitor is 3.3nf.

Images