Power supply circuit of display terminal and display terminal

Abstract

The utility model discloses a power supply circuit of a display terminal and the display terminal, relates to the technical field of power supply of the display terminal, and discloses the power supply circuit of the display terminal, comprising a conversion unit, the input end of which is connected with a power grid interface; the input end of the wireless input power supply unit is connected with the output end of the conversion unit, and the wireless input power supply unit is used for converting the input electric energy of the conversion unit into magnetic field energy; the output end of the wireless output power supply unit is connected with a power supply port in the display terminal, and the wireless output power supply unit is used for receiving the magnetic field energy and converting the magnetic field energy into output electric energy so as to supply power to the power supply port. The utility model provides a novel power supply mode for the display terminal, and the power supply of the display terminal is realized on the premise of not using solid wires.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display terminal power supply, and particularly relates to a display terminal power supply circuit and a display terminal. BACKGROUND

[0002] With the application of display terminal power supply technology being more and more widely, users also have higher requirements for display terminal power supply.

[0003] The traditional display terminal power supply mode is to connect to the mains socket or power supply system through the physical wire to supply power to the display terminal. This display terminal power supply mode has great defects, and the phenomenon of wired connection using physical wire for display terminal power supply exists. Therefore, a new display terminal power supply mode is urgently needed to realize display terminal power supply without using physical wire.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. Practical new type content

[0005] The main purpose of the present application is to provide a display terminal power supply circuit and a display terminal, which aims to provide a new display terminal power supply mode to realize display terminal power supply without using physical wire.

[0006] To achieve the above purpose, the present application provides a display terminal power supply circuit, which comprises:

[0007] A conversion unit, an input end of the conversion unit is connected with a power grid interface;

[0008] A wireless input power supply unit, an input end of the wireless input power supply unit is connected with an output end of the conversion unit, and the wireless input power supply unit is used to convert input electric energy of the conversion unit into magnetic field energy;

[0009] A wireless output power supply unit, an output end of the wireless output power supply unit is connected with a power supply port in the display terminal, and the wireless output power supply unit is used to receive the magnetic field energy and convert the magnetic field energy into output electric energy to supply power to the power supply port.

[0010] In an embodiment, the wireless input power supply unit comprises a first wireless power supply chip used by a transmitting end and a wireless input sub-circuit, the wireless input sub-circuit is used to output the magnetic field energy, and the first wireless power supply chip comprises:

[0011] A first universal input and output port, the first universal input and output port is connected with the output end of the conversion unit;

[0012] a second general input and output port, the second general input and output port being connected with a first end of the wireless input sub-circuit;

[0013] a chip demodulation port, the chip demodulation port being connected with a second end of the wireless input sub-circuit.

[0014] In an embodiment, the wireless input sub-circuit comprises:

[0015] a driving switch tube, a third end of the driving switch tube being connected with the second general input and output port;

[0016] a first capacitor, a first end of the first capacitor being connected with a first end of the driving switch tube;

[0017] a first coil, a first end of the first coil being connected with a second end of the driving switch tube, a second end of the first coil being connected with a second end of the first capacitor;

[0018] a first diode, an anode of the first diode being connected with the second end of the first capacitor;

[0019] a first resistor, a second end of the first resistor being connected with a cathode of the first diode;

[0020] a second resistor, a second end of the second resistor being connected with a first end of the first resistor, a first end of the second resistor being grounded;

[0021] a second capacitor, a second end of the second capacitor being connected with the first end of the first resistor, a first end of the second capacitor being grounded;

[0022] a third capacitor, a second end of the third capacitor being connected with the first end of the first resistor;

[0023] a third resistor, a second end of the third resistor being connected with a first end of the third capacitor;

[0024] a fourth capacitor, a second end of the fourth capacitor being connected with a first end of the third resistor, a first end of the fourth capacitor being grounded;

[0025] a fifth capacitor, a second end of the fifth capacitor being connected with the first end of the third resistor, a first end of the fifth capacitor being connected with the chip demodulation port.

[0026] In an embodiment, the wireless output power supply unit comprises a second wireless power supply chip used by a receiving end and a wireless output sub-circuit, the wireless output sub-circuit being used for receiving the magnetic field energy, the second wireless power supply chip comprising:

[0027] a chip input port group, the chip input port group being connected with the wireless output sub-circuit;

[0028] a chip output port, which is connected with the power supply port.

[0029] In an embodiment, the chip input port group comprises a first input port, a second input port and a power management port, and the wireless output sub-circuit comprises:

[0030] a second coil;

[0031] a sixth capacitor, a first end of which is connected with a second end of the second coil, and a second end of which is connected with the first input port;

[0032] a seventh capacitor, a first end of which is connected with a first end of the second coil and the second input port, and a second end of which is connected with the second end of the sixth capacitor;

[0033] a second diode, an anode of which is connected with the second end of the second coil;

[0034] a fourth resistor, a second end of which is connected with a cathode of the second diode;

[0035] a fifth resistor, a second end of which is connected with a first end of the fourth resistor, and a first end of which is grounded;

[0036] a filter chip, a first end of which is connected with the second end of the fifth resistor, and a second end of which is connected with the power management port.

[0037] In an embodiment, the conversion unit comprises an adapter or an AC-DC chip.

[0038] In an embodiment, the power supply circuit of the display terminal further comprises a power supply selection unit, which:

[0039] a power detection chip, an input end of which is connected with an output end of the wireless output power supply unit;

[0040] a selection chip, a control end of which is connected with an output end of the power detection chip, an input end of which is connected with an output end of the conversion unit, a first output end of which is connected with an input end of the wireless input power supply unit, and a second output end of which is connected with a wired power supply unit in the display terminal, wherein the wired power supply unit comprises a connection circuit for wired power supply using a wire.

[0041] In addition, to achieve the above-mentioned purpose, a display terminal is also provided, which comprises the above-mentioned power supply circuit of the display terminal.

[0042] In an embodiment, the display terminal comprises:

[0043] a backlight driving unit, an input driving power supply end of the backlight driving unit being connected with an output end of a wireless output power supply unit in a power supply circuit of the display terminal;

[0044] a display unit, a display power supply end of the display unit being connected with an output driving power supply end of the backlight driving unit;

[0045] a control unit, a control power supply end of the control unit being connected with the output end of the wireless output power supply unit, and a control end of the control unit being connected with a controlled end of the display unit.

[0046] In an embodiment, the display terminal comprises:

[0047] a backlight driving unit, an input driving power supply end of the backlight driving unit being connected with an output end of a wireless output power supply unit in a power supply circuit of the display terminal;

[0048] a display unit, a display power supply end of the display unit being connected with an output driving power supply end of the backlight driving unit;

[0049] a master control chip, a control power supply end of the master control chip being connected with the output end of the wireless output power supply unit, a first control end of the master control chip being connected with a first controlled end of the display unit, and a second control end of the master control chip being connected with a second controlled end of the backlight driving unit;

[0050] a terminal peripheral unit, an input end of the terminal peripheral unit being connected with a power supply control end of the master control chip.

[0051] The embodiment of the present application provides a power supply circuit of a display terminal, which comprises a conversion unit, an input end of the conversion unit is connected with a power grid interface; a wireless input power supply unit, an input end of the wireless input power supply unit is connected with an output end of the conversion unit, and the wireless input power supply unit is used for converting input electric energy of the conversion unit into magnetic field energy; and a wireless output power supply unit, an output end of the wireless output power supply unit is connected with a power supply port in the display terminal, and the wireless output power supply unit is used for receiving the magnetic field energy and converting the magnetic field energy into output electric energy to supply power to the power supply port. The power supply circuit of the display terminal converts the input electric energy of the conversion unit into the magnetic field energy through the wireless input power supply unit, receives the magnetic field energy based on the wireless output power supply unit, and then converts the magnetic field energy into the output electric energy to supply power to the power supply port, thereby avoiding the phenomenon that the display terminal needs to be supplied with power through wired connection by using physical wires. The power supply circuit of the display terminal supplies power to the power supply port in the display terminal through the wireless input power supply unit and the wireless output power supply unit, so that the display terminal is supplied with power without using physical wires. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is a frame schematic diagram of the first embodiment of the power supply circuit of the display terminal of the present application.

[0053] Figure 2 It is a frame schematic diagram of the first embodiment of the power supply circuit of the existing display terminal.

[0054] Figure 3 It is a frame schematic diagram of the second embodiment of the power supply circuit of the existing display terminal.

[0055] Figure 4 It is a frame schematic diagram of the third embodiment of the power supply circuit of the existing display terminal.

[0056] Figure 5 It is a connection schematic diagram of the wireless input power supply unit in the power supply circuit of the display terminal of the present application.

[0057] Figure 6 It is a connection schematic diagram of the wireless output power supply unit in the power supply circuit of the display terminal of the present application.

[0058] Figure 7 It is a frame schematic diagram of the display terminal of the present application.

[0059] Figure 8 It is still a frame schematic diagram of the display terminal of the present application.

[0060] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0061] Explanation of reference signs:

[0062] 100, display terminal; 110, power supply circuit of display terminal; 120, power supply port; 10, conversion unit; 20, wireless input power supply unit; 30, wireless output power supply unit; 210, power grid interface; 200, city power grid; 310, AC-DC circuit; 320, DC step-down circuit; 130, backlight driving unit; 140, control unit; 150, display unit; 330, adapter; 160, power supply and control unit; 340, adapter plate; 21, protection circuit; U1, first wireless power supply chip; Y1, crystal oscillator; R1-R10, first resistor-tenth resistor; C1-C29, first capacitor-twenty-ninth capacitor; D1-D5, first diode-fifth diode; X1-X2, first coil-second coil; L, inductor; K1, driving switch tube; GPIO1-GPIO3, first general-purpose input / output port-third general-purpose input / output port; DEMPD, chip demodulation port; Q1-Q2, first switch tube-second switch tube; 31, filter chip; 32, debugging port; 33, application processor; 34, current limiting controller; VDEM, power management end; ACP, second input end; ACN, first input end; 11, Type-C adapter; 170, master control chip; 180, terminal peripheral unit. DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the application.

[0064] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and specific embodiments.

[0065] The conventional display terminal still needs to be connected to the power socket or power supply system through the physical wire to work. The following lists three power supply modes of the display terminal: the first is to directly obtain power from the city power grid, which can be referred to as Figure 2 , Figure 2 The frame diagram of the first embodiment of the power supply circuit of the existing display terminal The display terminal 100 uses AC (alternating current) line to obtain 110V-230V alternating current from the city power grid 200, and converts the high-voltage alternating current into high-voltage direct current through the AC-DC circuit 310 after filtering. Then, the high-voltage direct current is reduced to low-voltage direct current through the DC step-down circuit 320. At this time, the low-voltage direct current can be used to drive the backlight driving unit 130 and the control unit 140. At the same time, the backlight driving unit 130 drives the display unit 150 to perform module backlight display, and the control unit 140 outputs the video signal to the display unit 150, such as LCD (Liquid Crystal Display), so that the display terminal 100 normally displays. The second is to obtain power from the city power grid through an external adapter, which can be referred to asFigure 3 , Figure 3 The second embodiment of the power supply circuit of the existing display terminal is a schematic diagram of the frame. The adapter 330 converts the mains into low-voltage direct current after being connected to the city power grid 200, and directly transmits the low-voltage direct current to the display terminal 100 through the wire of the adapter 300. At this time, the display terminal 100 determines whether it needs to be converted into power matching the subsequent circuit according to the voltage input by the adapter 330 to the display terminal 100. If it can match, the direct current voltage reduction circuit 320 can be omitted, otherwise the direct current voltage reduction circuit 320 needs to be used. Among them, the low-voltage direct current provided by the direct current voltage reduction circuit 320 can be used by the backlight driving unit 130 and the control unit 140. At the same time, the backlight driving unit 130 drives the display unit 150 to perform module backlight display, and the control unit 140 outputs the video signal to the display unit 150, so that the display terminal 100 normally displays and supplies power. The third is to take the way of externally hanging independent power supply and control unit 160 to obtain power from the city power grid 200. For reference Figure 4 , Figure 4 The third embodiment of the power supply circuit of the existing display terminal is a schematic diagram of the frame. The display terminal 100 is mainly divided into an external machine part composed of a power supply and control unit 160, and a display part composed of a conversion board 340, a backlight driving unit 130 and a display unit 150. Among them, the external machine part is mainly responsible for power conversion, audio and video signal receiving and processing, and transmission, whole machine control, the display part is mainly to drive the backlight driving unit 130, the conversion board 340 drives the LCD in the display unit 150. The whole power supply is that the power supply and control unit 160 converts the mains into high-voltage direct current after being connected to the city power grid 200, and directly transmits the high-voltage direct current to the conversion board 340 through the special wire. The conversion board 340 converts the high-voltage direct current into power matching the backlight driving unit 130, which can be used by the backlight driving unit 130. At the same time, the backlight driving unit 130 drives the display unit 150 backlight, and the conversion board 340 outputs the video signal to the display unit 150, so that the display terminal normally displays and supplies power (i.e. in the environment such as outdoor, it needs to have a power supply equipment that can be connected to supply power to the display terminal).

[0066] Therefore, based on the shortcomings of the above wired power supply mode of the display terminal, the power supply circuit of the display terminal of the present application is proposed: the input power of the conversion unit is converted into magnetic field energy by the wireless input power supply unit, and the magnetic field energy is converted into output power based on the wireless output power supply unit to supply power to the power supply port, thereby avoiding the phenomenon that the display terminal needs to be connected by using physical wire to supply power. This display terminal power supply circuit realizes the power supply of the display terminal through the wireless input power supply unit and the wireless output power supply unit to realize the power supply of the display terminal without using physical wire.

[0067] Based on this, the embodiment of the present application provides a power supply circuit of a display terminal, referring to Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a framework of a first embodiment of a power supply circuit of a display terminal according to the present application.

[0068] Referring to Figure 1 , the present application provides a power supply circuit 110 of a display terminal 100, the power supply circuit 110 of the display terminal 100 comprising:

[0069] a conversion unit 10, an input end of the conversion unit 10 being connected with a power grid interface 210;

[0070] a wireless input power supply unit 20, an input end of the wireless input power supply unit 20 being connected with an output end of the conversion unit 10, the wireless input power supply unit 20 being used for converting input electric energy of the conversion unit 10 into magnetic field energy;

[0071] a wireless output power supply unit 30, an output end of the wireless output power supply unit 30 being connected with a power supply port 120 in the display terminal 100, the wireless output power supply unit 30 being used for receiving the magnetic field energy and converting the magnetic field energy into output electric energy to supply power to the power supply port 120.

[0072] In an embodiment, the conversion unit 10 comprises an adapter or an AC-DC chip.

[0073] In the embodiment, the power supply circuit 110 of the display terminal 100 realizes wireless power supply for the devices in the display terminal 100 by using the wireless input power supply unit 20 and the wireless output power supply unit 30, and thus the display terminal power supply can be realized without using physical wires. The wireless input power supply unit 20 can use the relevant wireless power supply transmitting end chip, and the display terminal power is more than 60W, for example, the MT series chip such as MT5810, MT5805, MT5811, MT5815, MTQ5807 can be used without considering the power. The wireless output power supply unit 30 can use the relevant wireless power supply receiving end chip, for example, the MT series chip such as MT5785, MT5786, MT5735, MT5729, MT5728, and MT5727H can be used without considering the power. On the one hand, the input end of the wireless input power supply unit 20 is connected with the output end of the conversion unit 10, so as to convert the input electric energy of the conversion unit 10 into magnetic field energy (the conversion of input electric energy into magnetic field energy is the function of the wireless power supply transmitting end chip, which is not described in detail here). The conversion unit 10 can select an adapter (such as a Type-C adapter 11) or an AC-DC chip, an AC-DC circuit, etc. At this time, only the electric quantity output to the input end of the wireless input power supply unit 20 needs to be ensured. At this time, a separate power supply port can not be used, which affects the integrity of the whole machine and is not beautiful enough. If the Type-C adapter 11 is selected, the high-voltage circuit design can be avoided, so as to reduce the safety requirement of the design. The charging power of the Type-C adapter 11 has been improved to 240W, which can meet the power requirements of most display terminals. With the development of technology, the power that can be reached in the future will be higher. The input end of the conversion unit 10 is connected with the power grid interface 210, and the power grid interface 210 is the output port of alternating current, such as the socket connected with the display terminal 100. On the other hand, the output end of the wireless output power supply unit 30 is connected with the power supply port 120 in the display terminal 100, so as to convert the magnetic field energy into output electric energy (the conversion of magnetic field energy into input electric energy is the function of the wireless power supply receiving end chip, which is not described in detail here), and thus the power supply port 120 is powered. The power supply port 120 at least includes the power supply end of the backlight driving unit 130 and the power supply end of the control unit 140, and thus the power supply of the power supply port 120 at least can be realized in a wireless manner, so as to realize the display terminal power supply without using physical wires.

[0074] In an embodiment, the backlight driving unit 130, the control unit 140 and the display unit 150 in the display terminal 100 are all common units in the display terminal 100, the backlight driving unit 130 is used to control driving the backlight of the display unit 150, the control unit 140 is used to output a control signal to the display unit 150, and the display unit 150 is used to display, and each unit is not described in detail herein.

[0075] In the embodiment, a power supply circuit of a display terminal is provided, which comprises a conversion unit, an input end of the conversion unit being connected with a power grid interface; a wireless input power supply unit, an input end of the wireless input power supply unit being connected with an output end of the conversion unit, the wireless input power supply unit being used to convert input electric energy of the conversion unit into magnetic field energy; and a wireless output power supply unit, an output end of the wireless output power supply unit being connected with a power supply port in the display terminal, the wireless output power supply unit being used to receive the magnetic field energy and convert the magnetic field energy into output electric energy to supply power to the power supply port. The power supply circuit of the display terminal converts the input electric energy of the conversion unit into the magnetic field energy through the wireless input power supply unit, receives the magnetic field energy based on the wireless output power supply unit, and then converts the magnetic field energy into the output electric energy to supply power to the power supply port, thereby avoiding the phenomenon that the display terminal needs to be supplied with power through wired connection using a physical wire. The power supply circuit of the display terminal supplies power to the power supply port in the display terminal through the wireless input power supply unit and the wireless output power supply unit, so as to supply power to the display terminal without using a physical wire.

[0076] Further, based on the first embodiment of the display terminal of the present application, a second embodiment of the power supply circuit of the display terminal of the present application is provided, which refers to Figure 5 , Figure 5 FIG. 2 is a connection diagram of the wireless input power supply unit in the power supply circuit of the display terminal of the present application. The wireless input power supply unit 20 comprises a first wireless power supply chip U1 used by a transmitting end and a wireless input sub-circuit, the wireless input sub-circuit being used to output magnetic field energy, and the first wireless power supply chip U1 comprising:

[0077] a first general input and output port GPIO1, the first general input and output port GPIO1 being connected with an output end of the conversion unit 10;

[0078] a second general input and output port GPIO2, the second general input and output port GPIO2 being connected with a first end of the wireless input sub-circuit;

[0079] a chip demodulation port DEMPD, the chip demodulation port DEMPD being connected with a second end of the wireless input sub-circuit.

[0080] Further, the wireless input sub-circuit comprises:

[0081] The driving switch tube K1, the third end of the driving switch tube K1 is connected with the second general input and output port GPIO2;

[0082] The first capacitor C1, the first end of the first capacitor C1 is connected with the first end of the driving switch tube K1;

[0083] The first coil X1, the first end of the first coil X1 is connected with the second end of the driving switch tube K1, and the second end of the first coil X1 is connected with the second end of the first capacitor C1;

[0084] The first diode D1, the anode of the first diode D1 is connected with the second end of the first capacitor C1;

[0085] The first resistor R1, the second end of the first resistor R1 is connected with the cathode of the first diode D1;

[0086] The second resistor R2, the second end of the second resistor R2 is connected with the first end of the first resistor R1, and the first end of the second resistor R2 is grounded;

[0087] The second capacitor C2, the second end of the second capacitor C2 is connected with the first end of the first resistor R1, and the first end of the second capacitor C2 is grounded;

[0088] The third capacitor C3, the second end of the third capacitor C3 is connected with the first end of the first resistor R1;

[0089] The third resistor R3, the second end of the third resistor R3 is connected with the first end of the third capacitor C3;

[0090] The fourth capacitor C4, the second end of the fourth capacitor C4 is connected with the first end of the third resistor R3, and the first end of the fourth capacitor C4 is grounded;

[0091] The fifth capacitor C5, the second end of the fifth capacitor C5 is connected with the first end of the third resistor R3, and the first end of the fifth capacitor C5 is connected with the chip demodulation port DEMPD.

[0092] In the embodiment, the first wireless power supply chip U1 uses the MT5810 chip of the MAXIC company as an example for illustration, at this time the first wireless power supply chip U1 can provide a wireless power supply capacity of up to 120W for the subsequent stage through the coil. The first wireless power supply chip U1 includes a receiving input voltage, the receiving input voltage is the first general input and output port GPIO1 of the three pins of ISH / ISL / VIN5V, which is used to receive the input voltage from the output end of the conversion unit 10, and after the input voltage is processed by the first wireless power supply chip U1, the second general input and output port GPIO2 outputs to the wireless input subcircuit. It is worth mentioning that the first wireless power supply chip U1 can also include a protection circuit 21 connected with the third general input and output port GPIO3, such as overvoltage protection for the input voltage, short circuit protection for the first wireless power supply chip U1, etc., which can be a commonly used protection circuit, which will not be described one by one here. At the same time, the first wireless power supply chip U1 also needs to be connected with the crystal oscillator Y1, thereby forming the crystal oscillator circuit of the first wireless power supply chip U1, to realize the function of the chip crystal oscillator circuit. At the same time, the ISH and ISL of the first wireless power supply chip U1 can realize the normal high and low level input two node potential difference for current detection. The other connection circuits of the first wireless power supply chip U1 will not be described in detail here, mainly to illustrate that the first wireless power supply chip U1 receives the voltage based on the first general input and output port GPIO1, and outputs through the wireless input subcircuit. Of course, other chip circuits can also be used, which will not be described one by one here.

[0093] Further, based on the first embodiment and / or the second embodiment of the present application, a third embodiment of the power supply circuit of the display terminal of the present application is proposed, referring to Figure 6 , Figure 6 is a connection diagram of the wireless output power supply unit in the power supply circuit of the display terminal of the present application. The wireless output power supply unit 30 includes a second wireless power supply chip U2 used by the receiving end and a wireless output subcircuit, the wireless output subcircuit is used to receive magnetic field energy, the second wireless power supply chip U2 includes:

[0094] a chip input port group, the chip input port group is connected with the wireless output subcircuit;

[0095] a chip output port, the chip output port is connected with the power supply port 120.

[0096] Further, the chip input port group includes a first input end ACN, a second input end ACP and a power management end VDEM, and the wireless output subcircuit includes:

[0097] the second coil X2;

[0098] the sixth capacitor C6, a first end of the sixth capacitor C6 is connected with a second end of the second coil X2, and a second end of the sixth capacitor C6 is connected with the first input end ACN;

[0099] the seventh capacitor C7, a first end of the seventh capacitor C7 is connected with the first end of the second coil X2 and the second input end ACP, and a second end of the seventh capacitor C7 is connected with the second end of the sixth capacitor C6;

[0100] the second diode D2, an anode of the second diode D2 is connected with the second end of the second coil X2;

[0101] the fourth resistor R4, a second end of the fourth resistor R4 is connected with a cathode of the second diode D2;

[0102] the fifth resistor R5, a second end of the fifth resistor R5 is connected with a first end of the fourth resistor R4, and a first end of the fifth resistor R5 is grounded;

[0103] the filter chip 31, a first end of the filter chip 31 is connected with the second end of the fifth resistor R5, and a second end of the filter chip 31 is connected with the power management end VDEM.

[0104] In the embodiment, the wireless output power supply unit 30 adopts the MT5785 chip of the MAXIC company, and can obtain the maximum 100W power from the first coil X3 in the wireless input power supply unit 20 through the second coil X2, and convert it into direct current to supply to the backlight driving unit 130 and the control unit 140 for use. The 100W power can generally cover the common small size to 65-inch 4K definition display terminal. The wireless output power supply unit 30 receives the electric energy from the first coil X1 in the wireless input power supply unit 20 through the wireless output sub-circuit, and then inputs it to the second wireless power supply chip U2 through the first input end ACN and the second input end ACP, and based on the chip output port of the second wireless power supply chip U2, the chip output port is connected with the power supply port 120, such as the VOUT output voltage in the figure, and the second wireless power supply chip U2 can also include other peripheral circuits, such as the protection circuit connected with the upper interface (the upper end in the figure), the circuit or interface connected with the debugging port 32, the application processor 33, the filter chip 31 and the current limiting controller 34, etc., which will not be described in detail here. The wireless output power supply unit 30 is used to receive the electric energy from the first coil X1 to realize wireless charging. Of course, other chip circuits can also be used, which will not be described here.

[0105] Further, based on the first, second and / or third embodiments of the application described above, a fourth embodiment of the power supply circuit of the display terminal is proposed. The power supply circuit 110 of the display terminal 100 further comprises a power supply selection unit, and the power supply selection unit comprises:

[0106] The power detection chip is connected to the output end of the wireless output power supply unit 30.

[0107] The selection chip is connected to the output end of the power detection chip, the input end of the selection chip is connected to the output end of the conversion unit 10, the first output end of the selection chip is connected to the input end of the wireless input power supply unit 20, and the second output end of the selection chip is connected to the wired power supply unit in the display terminal, wherein the wired power supply unit comprises a connection circuit for wired power supply using a wire.

[0108] In this embodiment, in order to avoid the failure of the entire wireless power supply circuit, a backup circuit can be used. Since most wireless failures are caused by wireless transmission, a power detection chip can be used to detect the output end of the wireless output power supply unit 30. When the wireless power supply circuit fails, such as when the output end of the wireless output power supply unit 30 does not output voltage or the output voltage does not meet the requirements, it is determined that the wireless power supply circuit fails, and the used power supply circuit is selected based on the output end of the power detection chip. At this time, two groups of wireless power supply circuits can be selected to be set in the display terminal for backup, or one group of wireless power supply circuits and one group of wired power supply circuits can be selected for backup. When backing up the wired power supply circuit, if it is found that the output end voltage of the wireless output power supply unit 30 meets the requirements, the output end of the power detection chip outputs a high level, the first output end of the selection chip is connected to the input end of the selection chip, and the wireless power supply is normally implemented. Otherwise, if it is found that the output end voltage of the wireless output power supply unit 30 does not meet the requirements, the output end of the power detection chip outputs a low level, the second output end of the selection chip is connected to the input end of the selection chip, and the wired power supply is normally implemented. The wired power supply unit comprises a connection circuit for wired power supply using a wire, i.e., the wired circuit of the display terminal can be backed up. Figures 2-4 When the wireless circuit is backed up, two wireless input power supply units 20 and two wireless output power supply units 30 can be selected to be connected in parallel. At this time, the input end of the power detection chip is connected to a selection chip, and the input or output end voltage of the two wireless input power supply units 20 and the two wireless output power supply units 30 can be selectively determined, and when a failure is determined, the other backup is selected. For example, if the first wireless input power supply unit 20 fails (no output or abnormal output), the other wireless input power supply unit 20 is selected to work based on a one-of-two selector, and the intelligence and accuracy of the display terminal power supply can be greatly improved.

[0109] Based on the first embodiment, the second embodiment, the third embodiment and / or the fourth embodiment of the power supply circuit of the display terminal, the application further provides a display terminal 100, which comprises the power supply circuit 110 of the display terminal 100 described above.

[0110] It is worth noting that, according to the display terminal of the embodiment of the application, the display terminal converts the input electric energy of the conversion unit into magnetic field energy through the wireless input power supply unit, receives the magnetic field energy based on the wireless output power supply unit, and then converts the magnetic field energy into output electric energy to supply power to the power supply port, thereby avoiding the phenomenon that the display terminal needs to be supplied with power through wired connection using a physical wire. The power supply circuit of such a display terminal supplies power to the power supply port in the display terminal through the wireless input power supply unit and the wireless output power supply unit, so as to supply power to the display terminal without using a physical wire.

[0111] The device provided by the application provides a new power supply mode of the display terminal, which supplies power to the display terminal without using a physical wire. Compared with the prior art, the device provided by the application has the same beneficial effects as the power supply circuit of the display terminal provided by the above-mentioned embodiments, which will not be described here.

[0112] Further, based on the first embodiment of the application, the second embodiment of the display terminal of the application is proposed, which refers to Figure 7 , Figure 7 The figure is a schematic view of a frame of the display terminal of the application, and the display terminal 100 comprises:

[0113] The backlight driving unit 130 is connected to the output end of the wireless output power supply unit 30 in the power supply circuit 110 of the display terminal 100.

[0114] The display unit 150 is connected to the output driving power supply end of the backlight driving unit 130.

[0115] The control unit 140 is connected to the output end of the wireless output power supply unit 30, and the control end of the control unit 140 is connected to the controlled end of the display unit 150.

[0116] In the embodiment, the power supply circuit 110 of the display terminal 100 is powered by the wireless input power supply unit 20 which converts the AC power into DC power using the general type-c adapter 11. At this time, the wireless input power supply unit 20 converts the electric field energy into magnetic field energy through the internal coil and transmits the magnetic field energy to the input end of the wireless output power supply unit 30. At this time, the wireless output power supply unit 30 receives the magnetic field energy through the internal coil and converts the magnetic field energy into electric field energy and transmits the electric field energy to the lower level, which at least includes the power supply end of the backlight driving unit 130 and the control unit 140 in the display terminal 100. At this time, the output voltage of the wireless output power supply unit 30 can be converted into the required voltage value by using the related conversion circuit, and the required voltage value is output to the power supply end. After the backlight driving unit 130 and the control unit 140 are powered, the display terminal 100 can drive the display unit 150 through the backlight driving unit 130, and the control unit 140 outputs the video signal to the display unit 150 to display the LCD. Thus, the display terminal 100 is normally powered and displayed.

[0117] Further, based on the first embodiment and / or the second embodiment of the present application, the third embodiment of the display terminal of the present application is proposed, referring to Figure 8 , Figure 8 Another schematic diagram of the display terminal of the present application is shown in FIG. 6. The display terminal 100 includes:

[0118] The backlight driving unit 130, the input driving power supply end of the backlight driving unit 130 is connected to the output end of the wireless output power supply unit 30 in the power supply circuit 110 of the display terminal 100;

[0119] The display unit 150, the display power supply end of the display unit 150 is connected to the output driving power supply end of the backlight driving unit 130;

[0120] The main control chip 170, the control power supply end of the main control chip 170 is connected to the output end of the wireless output power supply unit 30, the first control end of the main control chip 170 is connected to the first controlled end of the display unit 150, and the second control end of the main control chip 170 is connected to the second controlled end of the backlight driving unit 130;

[0121] The terminal peripheral unit 180, the input end of the terminal peripheral unit 180 is connected to the power supply control end of the main control chip 170.

[0122] In the embodiment, the power supply circuit 110 of the display terminal 100 is converted into a wireless input power supply unit 20 by using a general type-c adapter 11 to obtain power supply from the mains, at this time the wireless input power supply unit 20 converts the electric field energy into magnetic field energy through the internal coil and transmits to the input end of the wireless output power supply unit 30, at this time the wireless output power supply unit 30 receives the magnetic field energy through the internal coil and converts it into electric field energy and transmits to the lower level, wherein the lower level at least includes the backlight driving unit 130 and the main control chip 170 in the display terminal 100 respectively power supply end, the control signal of the main control chip 170 is transmitted to the backlight driving unit 130, the backlight driving unit 130 drives the backlight of the display unit 150 with resolution of 2K and 4K 43 inch or more, the main control chip 170 outputs the video signal to the display unit 150 to display the content controlled by the main control, thus controlling the normal power supply display of the display terminal 100, at the same time the power supply circuit 110 of the whole display terminal 100 can also supply power and control to the terminal peripheral unit 180 through the main control chip 170, the terminal peripheral unit 180 can be other peripheral devices on the display terminal, such as Bluetooth, induction equipment, etc., that is, the power supply circuit 110 of the whole display terminal 100 can be applied to different display terminals 100, so as to expand the use scene of the power supply circuit 110 of the whole display terminal 100.

[0123] The above is only part of the embodiments of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A power supply circuit for a display terminal, characterized by comprising: The power supply circuit of the display terminal comprises: a conversion unit, an input end of the conversion unit being connected with a power grid interface; a wireless input power supply unit, an input end of the wireless input power supply unit being connected with an output end of the conversion unit, the wireless input power supply unit being used for converting input electric energy of the conversion unit into magnetic field energy; a wireless output power supply unit, an output end of the wireless output power supply unit being connected with a power supply port in the display terminal, the wireless output power supply unit being used for receiving the magnetic field energy and converting the magnetic field energy into output electric energy to supply power to the power supply port.

2. The power supply circuit for a display terminal according to claim 1, wherein The wireless input power supply unit comprises a first wireless power supply chip used by a transmitting end and a wireless input sub-circuit, the wireless input sub-circuit being used for outputting the magnetic field energy, the first wireless power supply chip comprising: a first general input and output port, the first general input and output port being connected with the output end of the conversion unit; a second general input and output port, the second general input and output port being connected with a first end of the wireless input sub-circuit; a chip demodulation port, the chip demodulation port being connected with a second end of the wireless input sub-circuit.

3. The power supply circuit for a display terminal according to claim 2, wherein The wireless input sub-circuit comprises: a driving switch tube, a third end of the driving switch tube being connected with the second general input and output port; a first capacitor, a first end of the first capacitor being connected with a first end of the driving switch tube; a first coil, a first end of the first coil being connected with a second end of the driving switch tube, a second end of the first coil being connected with a second end of the first capacitor; a first diode, an anode of the first diode being connected with the second end of the first capacitor; a first resistor, a second end of the first resistor being connected with a cathode of the first diode; a second resistor, a second end of the second resistor being connected with a first end of the first resistor, a first end of the second resistor being grounded; a second capacitor, a second end of the second capacitor being connected with the first end of the first resistor, a first end of the second capacitor being grounded; a third capacitor, a second end of the third capacitor being connected with the first end of the first resistor; a third resistor, a second end of the third resistor being connected with a first end of the third capacitor; a fourth capacitor, a second end of the fourth capacitor being connected with a first end of the third resistor, a first end of the fourth capacitor being grounded; a fifth capacitor, a second end of the fifth capacitor being connected with the first end of the third resistor, a first end of the fifth capacitor being connected with the chip demodulation port.

4. The power supply circuit for a display terminal according to claim 1, wherein The wireless output power supply unit comprises a second wireless power supply chip used by a receiving end and a wireless output sub-circuit, the wireless output sub-circuit being used for receiving the magnetic field energy, the second wireless power supply chip comprising: a chip input port group, the chip input port group being connected with the wireless output sub-circuit; a chip output port, the chip output port being connected with the power supply port.

5. The power supply circuit for a display terminal according to claim 4, wherein The chip input port group comprises a first input end, a second input end and a power management end, the wireless output sub-circuit comprising: a second coil; A sixth capacitor, a first end of the sixth capacitor is connected with the second end of the second coil, and a second end of the sixth capacitor is connected with the first input end; A seventh capacitor, a first end of the seventh capacitor is connected with the first end of the second coil and the second input end, and a second end of the seventh capacitor is connected with the second end of the sixth capacitor; A second diode, an anode of the second diode is connected with the second end of the second coil; A fourth resistor, a second end of the fourth resistor is connected with a cathode of the second diode; A fifth resistor, a second end of the fifth resistor is connected with a first end of the fourth resistor, and a first end of the fifth resistor is grounded; A filter chip, a first end of the filter chip is connected with the second end of the fifth resistor, and a second end of the filter chip is connected with the power management end.

6. The power supply circuit for a display terminal according to claim 1, wherein The conversion unit comprises an adapter or an AC-DC chip.

7. A power supply circuit for a display terminal as claimed in any one of claims 1 to 6, characterized in that The power supply circuit of the display terminal further comprises a power supply selection unit, and the power supply selection unit comprises: An electric quantity detection chip, an input end of the electric quantity detection chip is connected with an output end of the wireless output power supply unit; A selection chip, a control end of the selection chip is connected with an output end of the electric quantity detection chip, an input end of the selection chip is connected with an output end of the conversion unit, a first output end of the selection chip is connected with an input end of the wireless input power supply unit, and a second output end of the selection chip is connected with a wired power supply unit in the display terminal, wherein the wired power supply unit comprises a connection circuit for wired power supply by using a wire.

8. A display terminal, characterized by The display terminal comprises the power supply circuit of the display terminal according to any one of claims 1 to 7.

9. The display terminal of claim 8, wherein, The display terminal comprises: A backlight driving unit, an input driving power supply end of the backlight driving unit is connected with an output end of the wireless output power supply unit in the power supply circuit of the display terminal; A display unit, a display power supply end of the display unit is connected with an output driving power supply end of the backlight driving unit; A control unit, a control power supply end of the control unit is connected with an output end of the wireless output power supply unit, and a control end of the control unit is connected with a controlled end of the display unit.

10. The display terminal of claim 8, wherein, The display terminal comprises: A backlight driving unit, an input driving power supply end of the backlight driving unit is connected with an output end of the wireless output power supply unit in the power supply circuit of the display terminal; A display unit, a display power supply end of the display unit is connected with an output driving power supply end of the backlight driving unit; A master control chip, a control power supply end of the master control chip is connected with an output end of the wireless output power supply unit, a first control end of the master control chip is connected with a first controlled end of the display unit, and a second control end of the master control chip is connected with a second controlled end of the backlight driving unit; A terminal peripheral unit, an input end of the terminal peripheral unit is connected with a power supply control end of the master control chip.

Images