WO2016155268A1 - 无线供电接收装置和显示设备 - Google Patents

无线供电接收装置和显示设备 Download PDF

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Publication number
WO2016155268A1
WO2016155268A1 PCT/CN2015/090235 CN2015090235W WO2016155268A1 WO 2016155268 A1 WO2016155268 A1 WO 2016155268A1 CN 2015090235 W CN2015090235 W CN 2015090235W WO 2016155268 A1 WO2016155268 A1 WO 2016155268A1
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Prior art keywords
diode
mos transistor
wireless power
capacitor
cathode
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English (en)
French (fr)
Inventor
陈光郎
谢仁礼
王坚
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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Publication of WO2016155268A1 publication Critical patent/WO2016155268A1/zh
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  • the present invention relates to the field of power supply, and in particular, to a wireless power receiving device and a display device.
  • Wireless power technology is a technology that uses radio to transmit electrical energy and is one of the most popular and potentially marketable technologies of recent times.
  • the existing wireless power supply technology mainly adopts the following three methods:
  • This technology is similar to the transformer technology commonly used in power systems.
  • the alternating current is applied to the primary side of the transformer, and the secondary side generates an induced electromotive force due to the principle of electromagnetic induction. If the secondary side circuit is connected, an induced current can occur, and the direction follows the Lenz's law, and the magnitude can be solved by Maxwell's electromagnetic theory.
  • the primary side of the transformer is equivalent to the power transmitting coil
  • the secondary side is equivalent to the power receiving coil, so that the wireless transmission of electrical energy from the transmitting coil to the receiving coil can be realized.
  • the non-contact wireless power transmission method has the advantages of low manufacturing cost, simple structure, reliable technology, and transmission power ranging from several watts to several hundred watts.
  • the transmission distance is less than 25px, and the charged product must be placed near the charger.
  • the charger must have the ability to identify the product being charged. Otherwise, it will transfer energy to any nearby metal, causing it to heat up and cause danger.
  • the required two systems for transmitting and receiving can be made of induction coils.
  • the transmitting end vibrates at a certain high frequency, which produces an ordinary electromagnetic wave that is diffused everywhere, forming an energy passage between the two coils.
  • the natural frequency at the receiving end is the same as the frequency at the transmitting end, and resonance occurs. With each resonance, more voltage is generated in the receiver inductor. After multiple resonances, the surface of the inductor will accumulate enough energy, so that the receiving end receives energy in the non-radiative magnetic field, thereby completing the conversion of magnetic energy to electric energy, and realizing the wireless transmission of electric energy.
  • the non-contact wireless power transmission mode can transmit power up to several kilowatts and the transmission distance can reach 3 to 4 meters, but the required frequency must be protected. It takes several MHz to several hundred MHz to transmit in a few meters.
  • the system consists of electromagnetic wave generator, transmitting antenna, receiving antenna, high-frequency electromagnetic wave rectifier, substation equipment and wired power grid.
  • the electromagnetic wave generator is a microwave source or a laser, and converts the electric energy transmitted by the power source into a high-power, high-frequency electromagnetic wave, which is fed to the transmitting antenna; the transmitting antenna transmits the electromagnetic wave; the receiving antenna collects the energy of the electromagnetic wave and inputs the high-frequency electromagnetic wave rectifier to generate The high voltage direct current is sent to the wired power grid after being inverted.
  • the non-contact wireless power transmission mode has a transmission distance of up to 10 m, but the transmission power is small (up to 100 mW), and the power is low, and a large amount of power transmitted by the transmitter radio waves is wasted by radio waves.
  • the non-contact wireless power transmission method has the advantages of low manufacturing cost, simple structure, reliable technology, and transmission power ranging from several watts to several hundred watts.
  • Display devices such as televisions have been used as a basic home appliance to reach thousands of households.
  • wireless power supply technology has been applied to television sets, but the television is usually used as a wireless power transmission terminal.
  • Power is supplied to other terminals, such as powering mobile phones and TV remotes.
  • the TV is connected to the external power supply through the power cable, but the power cable is easy to bring inconvenience to the user.
  • the power supplies of the respective household appliances are easily entangled, and the power cable is also occupied. A certain amount of space.
  • a main object of the present invention is to provide a wireless power receiving device and a display device for wirelessly supplying power to a display device.
  • the present invention provides a wireless power receiving device for wirelessly supplying power to a display device, including a resonance module, a rectification filter module, and a DC conversion module, wherein:
  • the resonant module includes a receiving coil and a capacitor unit for sensing a magnetic field change of the wireless power transmitting device to generate an alternating voltage; the receiving coil is movably connected under the display screen of the display device;
  • the rectifying and filtering module is connected to the resonant module for converting the alternating voltage into a direct current voltage
  • the DC conversion module is connected to the rectification filter module for boosting or stepping down the DC voltage to a supply voltage.
  • the receiving coil is connected to the underside of the display screen of the display device by a hinge.
  • the capacitor unit comprises a selection switch, a plurality of resonant capacitors, a first end of the selection switch is connected to a first end of the receiving coil, and a second end of the selection switch is connected to the plurality of resonant capacitors The first end of one of the resonant capacitors is connected, and the second end of the plurality of resonant capacitors is connected to the second end of the receiving coil.
  • the rectifying and filtering module comprises a first diode, a second diode, a third diode, a fourth diode and a filter capacitor, and the cathode and the second pole of the first diode
  • the anode of the tube is connected, the cathode of the second diode is connected to the cathode of the third diode, the anode of the third diode is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the first two a cathode of the pole tube is connected, a cathode of the first diode is connected to a second end of the receiving coil, and a cathode of the fourth diode is connected to a first end of the receiving coil, the second A cathode of the diode is coupled to the second end of the filter capacitor, and a cathode of the first diode is coupled to the first end of the filter capacitor.
  • the wireless power receiving device further includes a super capacitor, and the DC conversion module is connected to the rectification filter module by the super capacitor.
  • the DC conversion module includes a controller, a first inductor, a fourth capacitor, a first MOS transistor, a second MOS transistor, a third MOS transistor, and a fourth MOS transistor respectively connected to the controller.
  • the first MOS transistor, the second MOS transistor, the third MOS transistor, and the fourth MOS transistor are all N-channel MOS transistors.
  • a drain of the first MOS transistor is connected to one end of the super capacitor, a gate of the first MOS transistor is connected to the controller, and a source of the first MOS transistor and the first a drain of the MOS transistor, a source of the first MOS transistor is further connected to a drain of the third MOS transistor through the first inductor; a gate of the second MOS transistor and the controller Connecting, a source of the second MOS transistor is connected to a source of the third MOS transistor; a gate of the third MOS transistor is connected to the controller, and a drain of the third MOS transistor is connected a drain connection of a fourth MOS transistor, a source of the third MOS transistor being connected to a source of the fourth MOS transistor through the fourth capacitor; a gate of the fourth MOS transistor and the control Connected.
  • the DC conversion module further includes a first resistor and a second resistor, a first end of the fourth capacitor is connected to a first end of the second resistor, and a second end of the fourth capacitor is The first end of the first resistor is connected, and the second end of the second resistor is respectively connected to the second end of the first resistor and the controller.
  • the present invention further provides a display device comprising the wireless power receiving device according to any one of the above aspects.
  • the power supply is wirelessly supplied to the display device through the resonance module, the rectification filter module and the DC conversion module, which is more convenient, and the power line can be omitted.
  • FIG. 1 is a schematic structural diagram of a wireless power receiving device according to the present invention.
  • FIG. 2 is a schematic circuit diagram of a wireless power receiving device of the present invention.
  • the wireless power receiving device includes a resonance module 10 and a rectification filter.
  • the rectifying and filtering module 20 is connected to the resonant module 10 for converting the alternating voltage into a direct current voltage.
  • the DC conversion module 30 is connected to the rectifying and filtering module 20 for raising the direct current voltage. Press or step down to supply voltage.
  • the rectifying and filtering module 20 can change the alternating voltage outputted by the resonant module 10 into a direct current voltage in an active manner or in a passive manner.
  • the receiving coil 11 is a skeletonless hollow core ring, which is a copper wire wound multi-turn rectangle.
  • the receiving coil is movably connected under the display screen of the television, and can be rotated 180 degrees around the long side of the receiving coil 11. To receive polarized electromagnetic waves in different directions to improve power supply efficiency.
  • the receiving coil 11 and the capacitor unit 12 form a resonant circuit, and the magnetic field change of the inductive wireless power transmitting device obtains the highest voltage and energy to generate an alternating voltage.
  • the resonant frequency of the resonant circuit formed by the receiving coil 11 and the capacitive unit 12 coincides with the resonant frequency of the wireless power transmitting device.
  • the wireless power receiving device After receiving the energy transmitted by the wireless power transmitting device, the wireless power receiving device converts the energy into electrical energy, and outputs the power supply voltage to supply power to the television.
  • the television can continue to supply power during the power outage, and the user can continue to watch the television program.
  • the receiving coil 11 is connected to the lower side of the display screen of the television through a hinge.
  • the hinge may be a hinge hinge, and the number of the hinges may be set according to actual needs, such as two, the hinges are evenly distributed at the connection between the receiving coil 11 and the display screen of the television, so that the receiving coil 11 A stable connection is under the display of the TV.
  • the receiving coil 11 can be rotated 180 degrees around the long side of the receiving coil 11 through the hinge to receive polarized electromagnetic waves in different directions, thereby improving power supply efficiency.
  • the capacitor unit 12 includes a selection switch K1, a plurality of resonant capacitors (including a first resonant capacitor C1, a second resonant capacitor C2, and a third resonant capacitor C3).
  • the first end of the select switch K1 is connected to the receiving coil.
  • the first end of the selection switch K1 is connected to a first end of one of the plurality of resonant capacitors, and the second end of the plurality of resonant capacitors is connected to the second end of the receiving coil 11 .
  • the selection switch K1 is configured to select one of the plurality of resonant capacitors to form a resonant loop with the receiving coil 11.
  • the capacitance values of the plurality of resonant capacitors are different, and several common capacitor values can be preset according to actual needs.
  • the selection switch K1 selects a suitable resonant capacitor and the receiving coil 11 to form a resonant circuit such that the resonant frequency of the resonant circuit of the wireless power receiving device coincides with the resonant frequency of the wireless power transmitting device.
  • the wireless power receiving device can be adapted to the transmitting frequency of different wireless power transmitting devices, so that the wireless power receiving device is more efficient to use.
  • the rectifying and filtering module 20 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, and a filter capacitor CE1.
  • the anode of the four diode D4 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the second end of the receiving coil 11, and the cathode of the fourth diode D4 is received.
  • the first end of the coil 11 is connected, the cathode of the second diode D2 is connected to the second end of the filter capacitor CE1, and the anode of the first diode D1 is connected to the first end of the filter capacitor CE1.
  • the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 form a rectifier bridge, and the rectifier bridge rectifies the alternating voltage outputted by the resonance module 10 to become
  • the DC voltage, the rectified DC voltage is generally rippled, and the ripple in the DC voltage output from the rectifier bridge is removed by the filter capacitor CE1.
  • the wireless power receiving device further includes a super capacitor CE2, and the DC conversion module 30 is connected to the rectifier filter module 20 through the super capacitor CE2.
  • the first end of the super capacitor CE2 is connected to the first end of the filter capacitor CE1, and the second end of the super capacitor CE2 is connected to the second end of the filter capacitor CE1.
  • the supercapacitor CE2 can easily cope with the change of the field strength and the instantaneous interruption of the field strength.
  • the DC conversion module 30 includes a controller 31, a first inductor L1, a fourth capacitor C4, and a first MOS transistor Q1, a second MOS transistor Q2, a third MOS transistor Q3, and a third connector respectively connected to the controller 31.
  • the MOS transistor Q4 further includes a first resistor R1 and a second resistor R2.
  • the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS transistor Q4 are all N-channel MOS transistors.
  • the drain of the first MOS transistor Q1 is connected to one end of the super capacitor CE2, the gate of the first MOS transistor Q1 is connected to the controller 31, and the source of the first MOS transistor Q1 and the second MOS transistor Q2 a drain connection, a source of the first MOS transistor Q1 is further connected to a drain of the third MOS transistor Q3 through the first inductor L1; a gate of the second MOS transistor Q2 is connected to the controller 31, the first The source of the second MOS transistor Q2 is connected to the source of the third MOS transistor Q3; the gate of the third MOS transistor Q3 is connected to the controller 31, and the drain of the third MOS transistor Q3 and the fourth MOS transistor The drain of Q4 is connected, the source of the third MOS transistor Q3 is connected to the source of the fourth MOS transistor Q4 through the fourth capacitor C4, and the gate of the fourth MOS transistor Q4 is connected to the controller 31.
  • the first end of the fourth capacitor C4 is connected to the first end of the second resistor R2, the second end of the fourth capacitor C4 is connected to the first end of the first resistor R1, and the second end of the second resistor R2 is The end is connected to the second end of the first resistor R1 and the controller 31, respectively.
  • the first end of the first resistor R1 and the first end of the second resistor R2 are connected to the host to output a supply voltage for the host.
  • the controller 31 controls the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS transistor Q4 to be turned on or off to boost or step down the DC voltage output from the super capacitor CE2.
  • the supply voltage which in turn powers the TV.
  • the controller 31 controls the first MOS transistor Q1 to be turned on, the second MOS transistor Q2 to be turned off, and the third MOS transistor Q3 to be turned on.
  • the fourth MOS transistor Q4 is turned off, or the first MOS transistor Q1 is turned on, the second MOS transistor Q2 is turned off, the third MOS transistor Q3 is turned off, and the fourth MOS transistor Q4 is turned on, that is, the third MOS transistor Q3 and the third The four MOS transistors Q4 can be alternately turned on.
  • the controller 31 controls the third MOS transistor Q3 to be turned on, the fourth MOS transistor Q4 to be turned off, the first MOS transistor Q1 to be turned on, and the second MOS transistor Q2 to be turned off.
  • the first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3, and the fourth MOS transistor Q4 form a Buck-Boost circuit, and can implement a step-up step-down function.
  • the present invention also provides a display device, including the wireless power receiving device of any of the above technical solutions.
  • the display device can be a television set.

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Abstract

本发明公开了一种无线供电接收装置，为显示设备进行无线供电，包括谐振模块、整流滤波模块、直流变换模块，其中：所述谐振模块包括接收线圈和电容单元，用于感应无线供电发射装置的磁场变化以产生交变电压；所述接收线圈活动连接在所述显示设备的显示屏下方；所述整流滤波模块，与所述谐振模块连接，用于将所述交变电压转换成直流电压；所述直流变换模块，与所述整流滤波模块连接，用于将所述直流电压升压或降压为供电电压。本发明还公开了一种显示设备。采用本发明的技术方案，可方便的为显示设备进行无线供电。

Description

无线供电接收装置和显示设备
技术领域
本发明涉及供电领域，尤其涉及一种无线供电接收装置和显示设备。
背景技术
无线供电技术是一种利用无线电传输电力能量的技术，是近来最为热门和最有潜在市场的技术之一。 现有的无线供电技术主要通过以下三种方式：
一、电磁感应技术
此技术类似电力系统中常用的变压器技术。在变压器的原边通入交变电流，副边由于电磁感应原理会产生感应电动势，若副边电路连通，即可出现感应电流，其方向遵从楞次定律，大小可由麦克斯韦电磁理论解出。相对于无线电源而言，变压器的原边相当于电源发射线圈，副边相当于电源接收线圈，这样就可以实现电能从发射线圈到接收线圈的无线传输。这种非接触式无线电力传输方式制造成本较低、结构简单、技术可靠、传输功率可从几瓦到几百瓦。
但是传送距离小于25px,被充电产品必须置于充电器附近，充电器必须具备对被充电产品进行辨识的能力，否则会向附近任意金属传输能量，导致其发热并产生危险
二、电磁共振技术：
这种技术基于电磁共振耦合原理，需要的发射和接收两个共振系统可分别由感应线圈制成。通过调整发射频率使发射端以某一高频率振动，其产生的不是弥漫于各处的普通电磁波，在两个线圈间形成一种能量通道。接收端的固有频率与发射端频率相同，因而发生了共振。随着每一次共振，接收端感应器中会有更多的电压产生。经过多次共振，感应器表面就会集聚足够的能量，这样接收端在此非辐射磁场中接收能量，从而完成了磁能到电能的转换，实现了电能的无线传输。这种非接触式无线电力传输方式传输功率可达几千瓦、传送距离可达3~4米，但是必须对所需频率进行保护，在几米范围内进行传输需要几MHz到几百MHz的频率。
三、无线电波技术：
这种技术是利用微波或激光形式来实现电能的远程传输，系统由电磁波发生器、发射天线、接收天线、高频电磁波整流器、变电设备和有线电网组成。
电磁波发生器是微波源或激光器，把电源传送的电能转变为大功率、高频的电磁波，馈送给发射天线;发射天线将电磁波发送出去;接收天线收集电磁波的能量并输入高频电磁波整流器，产生的高压直流电经逆变后送入有线电网。这种非接触式无线电力传输方式传送距离可达10m,但是传输功率小(最高100mW)、功效低，发射器无线电波发送的大量功率以无线电波的方式被浪费掉。
可以实现电能从发射线圈到接收线圈的无线传输。这种非接触式无线电力传输方式制造成本较低、结构简单、技术可靠、传输功率可从几瓦到几百瓦。
显示设备，如电视机已经作为一种基本家电，深入到千家万户中，在现有技术中，已经有将无线供电技术应用到电视机中，但是通常是将电视机作为无线供电发射端为其他终端供电，如为手机和电视遥控器供电等。电视机通过电源线连接外部电源，但是采用电源线，容易给用户带来不方便，如当有多个家用电器在同时使用时，各个家用电器的电源器容易缠绕在一起，电源线也会占用一定的空间。
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。
发明内容
本发明的主要目的在于提供一种无线供电接收装置和显示设备，旨在对显示设备进行无线供电。
为实现上述目的，本发明提供一种无线供电接收装置，为显示设备进行无线供电，包括谐振模块、整流滤波模块、直流变换模块，其中：
所述谐振模块包括接收线圈和电容单元，用于感应无线供电发射装置的磁场变化以产生交变电压；所述接收线圈活动连接在所述显示设备的显示屏下方；
所述整流滤波模块，与所述谐振模块连接，用于将所述交变电压转换成直流电压；
所述直流变换模块，与所述整流滤波模块连接，用于将所述直流电压升压或降压为供电电压。
优选地，所述接收线圈通过铰链与所述显示设备的显示屏下方连接。
优选地，所述电容单元包括选择开关、多个谐振电容，所述选择开关的第一端连接所述接收线圈的第一端，所述选择开关的第二端与所述多个谐振电容中的一个谐振电容的第一端连接，所述多个谐振电容的第二端与所述接收线圈的第二端连接。
优选地，所述整流滤波模块包括第一二极管、第二二极管、第三二极管、第四二极管和滤波电容，所述第一二极管的负极与第二二极管的正极相连，第二二极管的负极与第三二极管的负极相连，第三二极管的正极与第四二极管的负极相连，第四二极管的正极与第一二极管的正极相连，所述第一二极管的负极与所述接收线圈的第二端连接，所述第四二极管的负极与所述接收线圈的第一端连接，所述第二二极管的负极与所述滤波电容的第二端连接，所述第一二极管的正极与所述滤波电容的第一端连接。
优选地，所述无线供电接收装置还包括超级电容，所述直流变换模块通过所述超级电容与所述整流滤波模块连接。
优选地，所述直流变换模块包括控制器、第一电感、第四电容、与所述控制器分别连接的第一MOS管、第二MOS管、第三MOS管和第四MOS管。
优选地，所述第一MOS管、第二MOS管、第三MOS管和第四MOS管都为N沟道MOS管。
优选地，所述第一MOS管的漏极与所述超级电容的一端连接，所述第一MOS管的栅极与所述控制器连接，所述第一MOS管的源极与所述第二MOS管的漏极连接，所述第一MOS管的源极还通过所述第一电感与所述第三MOS管的漏极连接；所述第二MOS管的栅极与所述控制器连接，所述第二MOS管的源极与所述第三MOS管的源极连接；所述第三MOS管的栅极与所述控制器连接，所述第三MOS管的漏极与所述第四MOS管的漏极连接，所述第三MOS管的源极通过所述第四电容与所述第四MOS管的源极连接；所述第四MOS管的栅极与所述控制器连接。
优选地，所述直流变换模块还包括第一电阻和第二电阻，所述第四电容的第一端与所述第二电阻的第一端连接，所述第四电容的第二端与所述第一电阻的第一端连接，所述第二电阻的第二端与所述第一电阻的第二端和所述控制器分别连接。
此外，为实现上述目的，本发明还提供一种显示设备，包括上述任任一技术方案所述的无线供电接收装置。
采用本发明的无线供电接收装置和显示设备，通过谐振模块、整流滤波模块、直流变换模块为显示设备进行无线供电，更加方便，可省去电源线。
附图说明
图1为本发明无线供电接收装置的结构示意图；
图2为本发明无线供电接收装置的电路示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供一种无线供电接收装置，用于为显示设备进行无线供电，参照图1和图2，以电视机为例，在一实施例中，该无线供电接收装置包括谐振模块10、整流滤波模块20、直流变换模块30，其中：该谐振模块10包括接收线圈11和电容单元12，用于感应无线供电发射装置的磁场变化以产生交变电压；该接收线圈11活动连接在该电视机的显示屏下方；该整流滤波模块20，与该谐振模块10连接，用于将该交变电压转换成直流电压；该直流变换模块30，与该整流滤波模块20连接，用于将该直流电压升压或降压为供电电压。该整流滤波模块20可通过有源方式或无源方式将谐振模块10输出的交变电压变成直流电压。
该接收线圈11是无骨架的脱胎空芯圈，为铜线绕制的多匝数长方形，该接收线圈活动连接在电视机的显示屏下方，可围绕该接收线圈11的长边做180度旋转，以接收不同方向的极化电磁波，提高供电效率。
该接收线圈11与该电容单元12构成谐振回路，感应无线供电发射装置的磁场变化获得最高的电压和能量，以产生交变电压。该接收线圈11与该电容单元12构成的谐振回路的谐振频率与无线供电发射装置的谐振频率一致。
该无线供电接收装置接收到无线供电发射装置传递的能量后，将该能量转换为电能，输出供电电压为电视机进行供电，可在停电时为电视机继续供电，用户可继续收看电视机节目。
进一步的，该接收线圈11通过铰链与该电视机的显示屏下方连接。该铰链可以是合页铰链，该铰链个数可根据实际需要设置，如可设置为两个，该铰链均匀的分布在接收线圈11与电视机的显示屏下方的连接处，以使得该接收线圈11稳定的连接在电视机的显示屏下方。该接收线圈11可通过该铰链围绕该接收线圈11的长边做180度旋转，以接收不同方向的极化电磁波，提高供电效率。
进一步的，该电容单元12包括选择开关K1、多个谐振电容（如包括第一谐振电容C1、第二谐振电容C2、第三谐振电容C3），该选择开关K1的第一端连接该接收线圈11的第一端，该选择开关K1的第二端与该多个谐振电容中的一个谐振电容的第一端连接，该多个谐振电容的第二端与该接收线圈11的第二端连接。该选择开关K1用于选择该多个谐振电容中的一个谐振电容与该接收线圈11组成谐振回路。该多个谐振电容的电容值各不相同，可根据实际需要预先设置几个常用电容值。根据无线供电发射装置的发射频率，该选择开关K1选择合适的谐振电容与该接收线圈11组成谐振回路，以使得该无线供电接收装置的谐振回路的谐振频率与无线供电发射装置的谐振频率一致。通过该选择开关K1和多个谐振电容，可使得该无线供电接收装置适应不同无线供电发射装置的发射频率，使得该无线供电接收装置使用效率更高。
进一步的，该整流滤波模块20包括第一二极管D1、第二二极管D2、第三二极管D3、第四二极管D4和滤波电容CE1，该第一二极管D1的负极与第二二极管D2的正极相连，第二二极管D2的负极与第三二极管D3的负极相连，第三二极管D3的正极与第四二极管D4的负极相连，第四二极管D4的正极与第一二极管D1的正极相连，该第一二极管D1的负极与该接收线圈11的第二端连接，该第四二极管D4的负极与该接收线圈11的第一端连接，该第二二极管D2的负极与该滤波电容CE1的第二端连接，该第一二极管D1的正极与该滤波电容CE1的第一端连接。该第一二极管D1、第二二极管D2、第三二极管D3、第四二极管D4组成一个整流桥，该整流桥对谐振模块10输出的交变电压进行整流以变成直流电压，整流后的直流电压一般带有纹波，通过滤波电容CE1将该整流桥输出的直流电压中的纹波去掉。
进一步的，该无线供电接收装置还包括超级电容CE2，该直流变换模块30通过该超级电容CE2与该整流滤波模块20连接。该超级电容CE2的第一端与该滤波电容CE1的第一端连接，该超级电容CE2的第二端与该滤波电容CE1的第二端连接。通过该超级电容CE2可方便的应对场强的变化及场强的瞬时中断。
进一步的，该直流变换模块30包括控制器31、第一电感L1、第四电容C4、与该控制器31分别连接的第一MOS管Q1、第二MOS管Q2、第三MOS管Q3和第四MOS管Q4，该直流变换模块30还包括第一电阻R1和第二电阻R2。该第一MOS管Q1、第二MOS管Q2、第三MOS管Q3和第四MOS管Q4都为N沟道MOS管。该第一MOS管Q1的漏极与该超级电容CE2的一端连接，该第一MOS管Q1的栅极与该控制器31连接，该第一MOS管Q1的源极与该第二MOS管Q2的漏极连接，第一MOS管Q1的源极还通过该第一电感L1与该第三MOS管Q3的漏极连接；该第二MOS管Q2的栅极与该控制器31连接，该第二MOS管Q2的源极与该第三MOS管Q3的源极连接；该第三MOS管Q3的栅极与该控制器31连接，该第三MOS管Q3的漏极与该第四MOS管Q4的漏极连接，该第三MOS管Q3的源极通过该第四电容C4与该第四MOS管Q4的源极连接；该第四MOS管Q4的栅极与该控制器31连接。该第四电容C4的第一端与该第二电阻R2的第一端连接，该第四电容C4的第二端与该第一电阻R1的第一端连接，该第二电阻R2的第二端与该第一电阻R1的第二端和该控制器31分别连接。该第一电阻R1的第一端和该第二电阻R2的第一端连接主机，为主机输出供电电压。
该控制器31控制该第一MOS管Q1、第二MOS管Q2、第三MOS管Q3和第四MOS管Q4进行导通或截至，以将超级电容CE2输出的直流电压升压或降压为供电电压，进而为电视机供电。当超级电容CE2输出的直流电压小于显示设备的供电电压时（该供电电压可以预先设置），该控制器31控制第一MOS管Q1导通、第二MOS管Q2截止、第三MOS管Q3导通、第四MOS管Q4截止，或控制该第一MOS管Q1导通、第二MOS管Q2截止、第三MOS管Q3截止、第四MOS管Q4导通，即第三MOS管Q3和第四MOS管Q4可交替导通。当超级电容CE2输出的直流电压大于显示设备的供电电压时，该控制器31控制第三MOS管Q3导通、第四MOS管Q4截止、第一MOS管Q1导通、第二MOS管Q2截止，或控制该第三MOS管Q3导通、第四MOS管Q4截止、第一MOS管Q1截止、第二MOS管Q2导通，即第一MOS管Q1和第二MOS管Q2可交替导通。该第一MOS管Q1、第二MOS管Q2、第三MOS管Q3和第四MOS管Q4组成Buck-Boost电路，可实现升压降压功能。
本使用新型还提供一种显示设备，包括上述任一技术方案的无线供电接收装置。该显示设备可以为电视机。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (18)

  1. 一种无线供电接收装置，为显示设备进行无线供电，其特征在于，包括谐振模块、整流滤波模块、直流变换模块，其中：
    所述谐振模块包括接收线圈和电容单元，用于感应无线供电发射装置的磁场变化以产生交变电压；所述接收线圈活动连接在所述显示设备的显示屏下方；
    所述整流滤波模块，与所述谐振模块连接，用于将所述交变电压转换成直流电压；
    所述直流变换模块，与所述整流滤波模块连接，用于将所述直流电压升压或降压为供电电压。
  2. 如权利要求1所述的无线供电接收装置，其特征在于，所述接收线圈通过铰链与所述显示设备的显示屏下方连接。
  3. 如权利要求1所述的无线供电接收装置，其特征在于，所述电容单元包括选择开关、多个谐振电容，所述选择开关的第一端连接所述接收线圈的第一端，所述选择开关的第二端与所述多个谐振电容中的一个谐振电容的第一端连接，所述多个谐振电容的第二端与所述接收线圈的第二端连接。
  4. 如权利要求3所述的无线供电接收装置，其特征在于，所述整流滤波模块包括第一二极管、第二二极管、第三二极管、第四二极管和滤波电容，所述第一二极管的负极与第二二极管的正极相连，第二二极管的负极与第三二极管的负极相连，第三二极管的正极与第四二极管的负极相连，第四二极管的正极与第一二极管的正极相连，所述第一二极管的负极与所述接收线圈的第二端连接，所述第四二极管的负极与所述接收线圈的第一端连接，所述第二二极管的负极与所述滤波电容的第二端连接，所述第一二极管的正极与所述滤波电容的第一端连接。
  5. 如权利要求4所述的无线供电接收装置，其特征在于，所述无线供电装置还包括超级电容，所述直流变换模块通过所述超级电容与所述整流滤波模块连接。
  6. 如权利要求5所述的无线供电接收装置，其特征在于，所述直流变换模块包括控制器、第一电感、第四电容、与所述控制器分别连接的第一MOS管、第二MOS管、第三MOS管和第四MOS管。
  7. 如权利要求6所述所述的无线供电接收装置，其特征在于，所述第一MOS管、第二MOS管、第三MOS管和第四MOS管都为N沟道MOS管。
  8. 如权利要求7所述所述的无线供电接收装置，其特征在于，所述第一MOS管的漏极与所述超级电容的一端连接，所述第一MOS管的栅极与所述控制器连接，所述第一MOS管的源极与所述第二MOS管的漏极连接，所述第一MOS管的源极还通过所述第一电感与所述第三MOS管的漏极连接；所述第二MOS管的栅极与所述控制器连接，所述第二MOS管的源极与所述第三MOS管的源极连接；所述第三MOS管的栅极与所述控制器连接，所述第三MOS管的漏极与所述第四MOS管的漏极连接，所述第三MOS管的源极通过所述第四电容与所述第四MOS管的源极连接；所述第四MOS管的栅极与所述控制器连接。
  9. 如权利要求8所述所述的无线供电接收装置，其特征在于，所述直流变换模块还包括第一电阻和第二电阻，所述第四电容的第一端与所述第二电阻的第一端连接，所述第四电容的第二端与所述第一电阻的第一端连接，所述第二电阻的第二端与所述第一电阻的第二端和所述控制器分别连接。
  10. 如权利要求2所述的无线供电接收装置，其特征在于，所述电容单元包括选择开关、多个谐振电容，所述选择开关的第一端连接所述接收线圈的第一端，所述选择开关的第二端与所述多个谐振电容中的一个谐振电容的第一端连接，所述多个谐振电容的第二端与所述接收线圈的第二端连接。
  11. 如权利要求1所述的无线供电接收装置，其特征在于，所述整流滤波模块包括第一二极管、第二二极管、第三二极管、第四二极管和滤波电容，所述第一二极管的负极与第二二极管的正极相连，第二二极管的负极与第三二极管的负极相连，第三二极管的正极与第四二极管的负极相连，第四二极管的正极与第一二极管的正极相连，所述第一二极管的负极与所述接收线圈的第二端连接，所述第四二极管的负极与所述接收线圈的第一端连接，所述第二二极管的负极与所述滤波电容的第二端连接，所述第一二极管的正极与所述滤波电容的第一端连接。
  12. 如权利要求2所述的无线供电接收装置，其特征在于，所述整流滤波模块包括第一二极管、第二二极管、第三二极管、第四二极管和滤波电容，所述第一二极管的负极与第二二极管的正极相连，第二二极管的负极与第三二极管的负极相连，第三二极管的正极与第四二极管的负极相连，第四二极管的正极与第一二极管的正极相连，所述第一二极管的负极与所述接收线圈的第二端连接，所述第四二极管的负极与所述接收线圈的第一端连接，所述第二二极管的负极与所述滤波电容的第二端连接，所述第一二极管的正极与所述滤波电容的第一端连接。
  13. 如权利要求1所述的无线供电接收装置，其特征在于，所述无线供电装置还包括超级电容，所述直流变换模块通过所述超级电容与所述整流滤波模块连接。
  14. 如权利要求2所述的无线供电接收装置，其特征在于，所述无线供电装置还包括超级电容，所述直流变换模块通过所述超级电容与所述整流滤波模块连接。
  15. 如权利要求3所述的无线供电接收装置，其特征在于，所述无线供电装置还包括超级电容，所述直流变换模块通过所述超级电容与所述整流滤波模块连接。
  16. 如权利要求1所述的无线供电接收装置，其特征在于，所述直流变换模块包括控制器、第一电感、第四电容、与所述控制器分别连接的第一MOS管、第二MOS管、第三MOS管和第四MOS管。
  17. 如权利要求16所述的无线供电接收装置，其特征在于，所述直流变换模块还包括第一电阻和第二电阻，所述第四电容的第一端与所述第二电阻的第一端连接，所述第四电容的第二端与所述第一电阻的第一端连接，所述第二电阻的第二端与所述第一电阻的第二端和所述控制器分别连接。
  18. 一种显示设备，其特征在于，包括上述权利要求1至17任一项所述的无线供电接收装置。
PCT/CN2015/090235 2015-03-31 2015-09-22 无线供电接收装置和显示设备 Ceased WO2016155268A1 (zh)

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CN204559134U (zh) * 2015-03-31 2015-08-12 深圳Tcl新技术有限公司 无线供电接收装置和显示设备

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CN114866720A (zh) * 2022-05-25 2022-08-05 深圳创维－Rgb电子有限公司 电视机及其供电方法

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