Network interface connection circuit and device of display terminal

Abstract

The utility model discloses an internet access connection circuit and device of a display terminal, relates to the technical field of display terminals, and discloses the internet access connection circuit of the display terminal, which comprises an internet access transformer unit, an input end of the internet access transformer unit is connected with an external input internet access, and an output end of the internet access transformer unit is connected with the external input internet access. A first output end of the network port transformer unit is connected with an internal input network port of the display terminal, and the network port transformer unit is used for transmitting a communication signal of an external input network port to the display terminal; the input end of the internet port power supply unit is connected with the second output end of the internet port transformer unit, the output end of the internet port power supply unit is connected with a power supply interface of the display terminal, and the internet port power supply unit transmits electric energy input into an internet port from the outside to the display terminal. Power supply and communication of the display terminal are simultaneously realized based on a single circuit.

Description

Technical Field

[0001] This application relates to the field of display terminal technology, and in particular to a network port connection circuit and device for a display terminal. Background Technology

[0002] As display terminals are used more and more widely in various fields, users are also putting forward higher requirements for the power supply and communication of display terminals.

[0003] Traditional display terminals use 110V-230V AC power from the mains, which is rectified into high-voltage DC power and then stepped down to low-voltage DC power via a step-down circuit. This low-voltage DC power then powers the display terminal to operate normally. Communication is then performed separately via Ethernet or Wi-Fi. This method has significant drawbacks, requiring separate design for both communication and power supply circuits. Therefore, a new power supply and communication method for display terminals is urgently needed, one that can simultaneously achieve both power supply and communication using a single circuit.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main objective of this application is to provide a network port connection circuit and device for a display terminal, which aims to solve the technical problem of how to simultaneously realize power supply and communication of the display terminal based on a single circuit.

[0006] To achieve the above objectives, this application provides a network port connection circuit for a display terminal, the network port connection circuit of the display terminal comprising:

[0007] A network port transformer unit, wherein the input end of the network port transformer unit is connected to an external input network port, and the first output end of the network port transformer unit is connected to the internal input network port of the display terminal, wherein the network port transformer unit is used to transmit the communication signal of the external input network port to the display terminal;

[0008] A network port power supply unit is provided, wherein the input end of the network port power supply unit is connected to the second output end of the network port transformer unit, and the output end of the network port power supply unit is connected to the power supply interface of the display terminal, wherein the network port power supply unit transmits the power from the external input network port to the display terminal.

[0009] In one embodiment, the external input network port includes a plurality of external network port terminals, the internal input network port includes a plurality of internal network port terminals, and the number of external network port terminals is equal to the number of internal network port terminals. The network port transformer unit includes:

[0010] A transformer chip, wherein the transformer chip includes multiple transformer sub-units, the number of transformer sub-units being equal to half the number of internal network port terminals, and one external network port terminal and one internal network port terminal are connected to one port of the transformer sub-unit;

[0011] The transformer input terminal of the transformer subunit is connected to two external network ports, the first transformer output terminal of the transformer subunit is connected to two internal network ports, and the second transformer output terminal of the transformer subunit is connected to the input terminal of the network port power supply unit.

[0012] A grounding resistor, the first end of which is connected to the third transformer output terminal of the transformer subunit;

[0013] A grounding capacitor, wherein the first end of the grounding capacitor is connected to the second end of the grounding resistor, and the second end of the grounding capacitor is grounded.

[0014] In one embodiment, the two internal network ports include a first internal network port terminal and a second internal network port terminal, and the two external network ports include a first external network port terminal and a second external network port terminal. The transformer subunit includes:

[0015] The positive input terminal serves as the transformer input terminal of the transformer subunit and is connected to the first external network port terminal.

[0016] The negative input terminal serves as the transformer input terminal of the transformer subunit and is connected to the second external network port terminal.

[0017] The positive output terminal serves as the first transformer output terminal of the transformer subunit and is connected to the first internal network port terminal.

[0018] The negative output terminal serves as the first transformer output terminal of the transformer subunit and is connected to the second internal network port terminal.

[0019] The input intermediate terminal serves as the second transformer output terminal of the transformer subunit and is connected to the input terminal of the network port power supply unit.

[0020] The output intermediate terminal serves as the third transformer output terminal of the transformer subunit and is connected to the first terminal of the grounding resistor.

[0021] In one embodiment, the network port power supply unit includes two rectifier chips and an output control subunit. The input terminal of the rectifier chip is connected to the input intermediate terminal of the transformer subunit in the network port transformer unit. The output terminal of the rectifier chip is connected to the input terminal of the output control subunit. The output terminal of the output control subunit is connected to the power supply interface. The rectifier chip includes two rectifier circuits. The first terminals of the two rectifier circuits are connected and then connected to the input terminal of the output control subunit. The second terminals of the two rectifier circuits are respectively connected to one of the input intermediate terminals. The third terminals of the two rectifier circuits are connected together.

[0022] In one embodiment, the rectifier circuit includes two rectifier sub-circuits connected in series, the rectifier sub-circuit comprising:

[0023] The first switching transistor has a first terminal serving as the first terminal of the rectifier circuit, and a second terminal serving as the second terminal of the rectifier circuit.

[0024] A first capacitor, wherein a first terminal of the first capacitor is connected to a first terminal of the first switching transistor, and a second terminal of the first capacitor is connected to a third terminal of the first switching transistor;

[0025] A first resistor, the first end of which is connected to the first end of the first switching transistor, and the second end of which is connected to the third end of the first switching transistor;

[0026] The first transistor has its first terminal connected to the third terminal of the first switching transistor, and its second terminal serves as the third terminal of the rectifier circuit.

[0027] A diode sub-circuit, wherein the first terminal of the diode sub-circuit is connected to the second terminal of the first switching transistor, and the second terminal of the diode sub-circuit is connected to the third terminal of the first transistor;

[0028] The second capacitor has its first terminal connected to the third terminal of the first transistor, and its second terminal connected to the second terminal of the first transistor.

[0029] The second resistor has its first end connected to the third end of the first transistor, and its second end connected to the second end of the first transistor.

[0030] In one embodiment, the input terminal of the output control subunit includes a positive voltage input terminal and a negative voltage input terminal, and the diode subcircuit includes two first diodes and a second diode connected in series. When the first terminal of the first switching transistor is connected to the positive voltage input terminal, the cathode of the first diode serves as the first terminal of the diode subcircuit, and the cathode of the second diode serves as the second terminal of the diode subcircuit.

[0031] When the first terminal of the first switching transistor is connected to the negative voltage input terminal, the anode of the first diode serves as the first terminal of the diode sub-circuit, and the anode of the second diode serves as the second terminal of the diode sub-circuit.

[0032] In one embodiment, the output control subunit includes a third capacitor, a transformer, a fourth capacitor, and a third diode. The first terminal of the third capacitor, the first terminal of the transformer, the second terminal of the transformer, the first terminal of the fourth capacitor, and the cathode of the third diode are sequentially connected to the positive voltage input terminal of the output control subunit. The second terminal of the third capacitor, the third terminal of the transformer, the fourth terminal of the transformer, the second terminal of the fourth capacitor, and the anode of the third diode are sequentially connected to the negative voltage input terminal of the output control subunit.

[0033] In one embodiment, the power supply interface includes a positive terminal and a negative terminal, the output terminal of the output control subunit includes a positive voltage output terminal and a negative voltage output terminal, and the network port power supply unit further includes:

[0034] A power supply interface chip, wherein a first terminal of the power supply interface chip is connected to the positive voltage output terminal, and a second terminal of the power supply interface chip is connected to the negative voltage output terminal;

[0035] A DC-DC converter, wherein the first input terminal of the DC-DC converter is connected to the third terminal of the power supply interface chip, the second input terminal of the DC-DC converter is grounded, the first output terminal of the DC-DC converter is connected to the positive terminal, and the second output terminal of the DC-DC converter is connected to the negative terminal.

[0036] In one embodiment, the network port power supply unit further includes:

[0037] A low-voltage control chip is provided, wherein the input terminal of the low-voltage control chip is connected to the fourth terminal of the power supply interface chip, and the output terminal of the low-voltage control chip is connected to the third input terminal of the DC-DC converter. The fourth input terminal of the DC-DC converter is also connected to the positive voltage output terminal.

[0038] In addition, to achieve the above objectives, a network port connection device for a display terminal is also provided, which is the network port connection circuit of the display terminal described above.

[0039] This application provides a network port connection circuit for a display terminal, including a network port transformer unit. The input terminal of the network port transformer unit is connected to an external network port, and the first output terminal of the network port transformer unit is connected to an internal network port of the display terminal. The network port transformer unit is used to transmit communication signals from the external network port to the display terminal. A network port power supply unit is also included. The input terminal of the network port power supply unit is connected to the second output terminal of the network port transformer unit, and the output terminal of the network port power supply unit is connected to the power supply interface of the display terminal. The network port power supply unit transmits electrical energy from the external network port to the display terminal. This network port connection circuit for the display terminal uses the network port transformer unit to transmit power to the display terminal. The communication signal from the external input network port is transmitted to the display terminal. At the same time, the power supply unit is connected to the second output of the network port transformer unit through the input terminal of the network port power supply unit to transmit the power from the external input network port to the display terminal. This avoids the need for separate design of communication-related circuits and power supply-related circuits. This network port connection circuit of the display terminal transmits the communication signal from the external input network port to the display terminal through the network port transformer unit in the network port connection circuit. At the same time, the power supply unit is connected to the second output of the network port transformer unit through the input terminal of the network port power supply unit to transmit the power from the external input network port to the display terminal. Thus, the power supply and communication of the display terminal can be realized simultaneously based on a single circuit. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the network port connection circuit of the display terminal according to the first embodiment of this application;

[0041] Figure 2 A schematic diagram of the power supply and communication framework for an existing display terminal;

[0042] Figure 3 Another schematic diagram of the power supply and communication framework for existing display terminals;

[0043] Figure 4 This is a schematic diagram of the network port connection circuit of the display terminal in this application;

[0044] Figure 5 This is a schematic diagram of the network port transformer unit in the network port connection circuit of the display terminal in this application;

[0045] Figure 6 This is a schematic diagram of a network port power supply unit in the network port connection circuit of the display terminal of this application;

[0046] Figure 7 This is another connection diagram of the network port power supply unit in the network port connection circuit of the display terminal of this application.

[0047] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0048] Explanation of icon numbers:

[0049] 100. Display terminal; 110. Network port connection circuit of display terminal; 120 (J2) Internal input network port; 130. Power supply interface; 10. Network port transformer unit; 20. Network port power supply unit; 200 (J1) External input network port; 300. Urban power grid; 310. AC to DC circuit; 320. DC step-down circuit; 140. Backlight driving system; 150. Control system; 151. WIFI module; 152. Ethernet port; 330. Adapter; 153. Type-C; T1. Transformer chip; T11. Transformer subunit; r1-r12. External network port terminal; n1-n12. Internal network port terminal; R. Grounding resistor; C. Grounding capacitor; PR12 (PR36, PR45, PR78), Second transformer output terminal; MX+. Input positive terminal; MX-. Input negative terminal; MCT. Input intermediate terminal; TD+. Positive terminal; TD-, Negative terminal; TCT, Middle terminal; 21, Rectifier chip; 211, Rectifier circuit; 2111, Diode sub-circuit; 22, Output control sub-unit; Q1, First switch; R1, First resistor; R2, Second resistor; C1, First capacitor; C2, Second capacitor; Q2, First transistor; D1, First diode; D2, Second diode; Q3, Second transistor; Q4, Third transistor; Y, Transformer; D3, Third diode; C3-C11, Third capacitor-Eleventh capacitor; D4-D10, Fourth diode-Tenth diode; Q5-Q7, Second switch-Fourth switch; VC, Power supply; BT, DC-DC converter; R3-R17, Third resistor-Seventeenth resistor; L, Inductor; U1, Power supply interface chip; U2, Low voltage control chip; VDD, Positive voltage input terminal; VSS, Negative voltage input terminal. Detailed Implementation

[0050] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0051] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The common method for power supply and communication in display terminals is to control power supply and communication separately, as can be found in [reference needed]. Figure 2 , Figure 2This is a schematic diagram of the power supply and communication framework for an existing display terminal. When powering and communicating the entire architecture of a larger display terminal (40-100 inches), power is typically obtained from the city power grid 300. The 110V-230V AC power from the mains is rectified into high-voltage DC power by an AC-to-DC circuit 310, and then stepped down to low-voltage DC power by a DC-DC step-down circuit 320 to power the backlight drive system 140 and control system 150 of the display terminal. After power supply, network communication with the Internet is established through the Ethernet port 152 and the WIFI (Wireless Fidelity) module 151 in the control system 150. In this case, power supply and communication are separate. Further details can be found in [reference needed]. Figure 3 , Figure 3 This is another schematic diagram of the power supply and communication framework for existing display terminals. When powering and communicating the entire architecture of consumer-grade small display devices (less than 32 inches), the power supply is usually obtained from the city power grid 300 through an external adapter 330. After connecting to the city power grid 300 through the adapter 330, the mains power is converted into low DC voltage through the DC step-down circuit 320 and directly transmitted to the display terminal 100. After the display terminal 100 draws low DC voltage power from the adapter 330, it powers the backlight drive system 140 and the control system 150 of the display terminal. After powering on, it communicates with the Internet through the Ethernet port 152 and the WIFI module 151 in the control system 150. In this case, the power supply and communication are separate in either of the above methods.

[0053] Therefore, based on the shortcomings of the above-mentioned power supply and communication methods of display terminals, this application proposes a network port connection circuit for display terminals: The communication signal from the external input network port is transmitted to the display terminal through a network port transformer unit. Simultaneously, the input terminal of the network port power supply unit is connected to the second output terminal of the network port transformer unit to transmit the electrical energy from the external input network port to the display terminal. This avoids the need for separate design of communication-related circuits and power supply-related circuits. This network port connection circuit transmits the communication signal from the external input network port to the display terminal through the network port transformer unit in the network port connection circuit, and simultaneously transmits the electrical energy from the external input network port to the display terminal through the input terminal of the network port power supply unit and the second output terminal of the network port transformer unit. Thus, power supply and communication of the display terminal can be achieved simultaneously based on a single circuit.

[0054] Based on this, embodiments of this application provide a network port connection circuit for a display terminal, referring to... Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the network port connection circuit of the display terminal in this application.

[0055] Reference Figure 1This application provides a network port connection circuit 110 for a display terminal, the network port connection circuit 110 of the display terminal includes:

[0056] The network port transformer unit 10 has its input terminal connected to the external input network port 200 and its first output terminal connected to the internal input network port 120 of the display terminal 100. The network port transformer unit 10 is used to transmit the communication signal from the external input network port 200 to the display terminal 100.

[0057] The network port power supply unit 20 has its input end connected to the second output end of the network port transformer unit 10, and its output end connected to the power supply interface 130 of the display terminal 100. The network port power supply unit 20 transmits the power from the external network port 200 to the display terminal 100.

[0058] In this embodiment, to simultaneously achieve power supply and communication for the display terminal (which can be a television, computer, or other display terminal), a network port connection circuit 110 for the display terminal of this application is proposed. This circuit achieves power supply and communication through PoE (Power Over Ethernet) technology. (See reference...) Figure 4 , Figure 4This is a schematic diagram of the network port connection circuit of the display terminal in this application. The network cable is directly connected through the Ethernet port 152. The network cable is based on the network port connection circuit 110 of the display terminal 100 to simultaneously realize the power supply and communication of the display terminal 100. At the same time, a Type-C 153 is set in the control system for power supply backup, and a WIFI module is set for communication backup to ensure the diversity of power supply and communication of the display terminal 100 and the stable operation of the entire display terminal 100. In the network port connection circuit 110 of the display terminal, the input terminal of the network port transformer unit 10 is connected to the external input network port 200. The external input network port 200 refers to the connection port of the network cable. At this time, the connection port is connected to the communication signal and power transmitted on the network cable, so as to process the communication signal through the network port transformer unit 10 and transmit the communication signal to the internal input network port 120 of the display terminal 100. The internal input network port 120 refers to the interface for receiving communication signals inside the display terminal 100. This interface is used to receive external communication signals, and then the communication signal can be transmitted through the network port transformer unit 10. The network port transformer unit 10 can be a circuit composed of a related network transformer chip (i.e., the transformer chip T1). The model of the network transformer chip can be 7490220122, or other models, which are not limited here. Meanwhile, the network port connection circuit 110 of the display terminal also includes a network port power supply unit 20. The network port power supply unit 20 is connected to the second output terminal of the network port transformer unit 10. At this time, the second output terminal of the network transformer chip can output power based on PoE technology. This power is output to the power supply interface 130 of the display terminal 100 through the network port power supply unit 20. The power supply interface 130 refers to the power supply interface inside the display terminal 100, which is used to supply power to various internal units or devices. The network port power supply unit 20 can be composed of a power supply interface chip U1, such as a chip of model TPS2373, or it can include related step-down chips to provide different voltages to the display terminal 100. Therefore, power supply and communication of the display terminal 100 can be realized based on the network port connection circuit 110 of the display terminal, thereby reducing the use of power supply-related devices and reducing the cost of power supply and communication implementation.

[0059] In this embodiment, a network port connection circuit for a display terminal is provided, including a network port transformer unit. The input terminal of the network port transformer unit is connected to an external input network port, and the first output terminal of the network port transformer unit is connected to an internal input network port of the display terminal. The network port transformer unit is used to transmit communication signals from the external input network port to the display terminal. A network port power supply unit is also provided. The input terminal of the network port power supply unit is connected to the second output terminal of the network port transformer unit, and the output terminal of the network port power supply unit is connected to the power supply interface of the display terminal. The network port power supply unit transmits electrical energy from the external input network port to the display terminal. This network port connection circuit for the display terminal uses the network port transformer unit to transmit power to the display terminal. The communication signal from the external input network port is transmitted to the display terminal. At the same time, the power supply unit is connected to the second output of the network port transformer unit through the input terminal of the network port power supply unit to transmit the power from the external input network port to the display terminal. This avoids the need for separate design of communication-related circuits and power supply-related circuits. This network port connection circuit of the display terminal transmits the communication signal from the external input network port to the display terminal through the network port transformer unit in the network port connection circuit. At the same time, the power supply unit is connected to the second output of the network port transformer unit through the input terminal of the network port power supply unit to transmit the power from the external input network port to the display terminal. Thus, the power supply and communication of the display terminal can be realized simultaneously based on a single circuit.

[0060] Furthermore, based on the first embodiment of this application described above, a second embodiment of the network port connection circuit for the display terminal of this application is proposed, referring to... Figure 5 , Figure 5 This application shows a schematic diagram of the network port transformer unit in the network port connection circuit of the display terminal. The external input network port J1 includes multiple external network port terminals r1-r12, where signal and power transmission relies on r1-r8, and r9-r12 are the connector grounds. Different connectors may have different numbers of r9-r12. The internal input network port J2 includes multiple internal network port terminals n1-n12, where signal transmission relies on n1-n8, and n9-n12 are the connector grounds. Different connectors may have different numbers of n9-n12. Complete data transmission can be achieved by using PCB traces n1-n8 (the above is only an example of one connector). The number of external network port terminals r1-r12 is equal to the number of internal network port terminals n1-n12. The network port transformer unit 10 includes:

[0061] Transformer chip T1, wherein the transformer chip T1 includes multiple transformer sub-units T11, the number of transformer sub-units T11 is equal to half the number of internal network port terminals n1-n12, and one external network port terminal r1-r12 and one internal network port terminal n1-n12 are connected to one port of transformer sub-unit T11;

[0062] The transformer input terminal of transformer subunit T11 is connected to two external network port terminals r1-r12, the first transformer output terminal of transformer subunit T11 is connected to two internal network port terminals n1-n12, and the second transformer output terminal of transformer subunit T11 is connected to the input terminal of network port power supply unit 10.

[0063] The grounding resistor R is connected at its first end to the third transformer output terminal of the transformer subunit T11.

[0064] Grounding capacitor C, the first end of grounding capacitor C is connected to the second end of grounding resistor R, and the second end of grounding capacitor C is grounded.

[0065] Furthermore, the two internal network port terminals n1-n12 include a first internal network port terminal n1 and a second internal network port terminal n2 (the first internal network port terminal n1 and the second internal network port terminal n2 are used as examples for explanation), and the two external network port terminals r1-r12 include a first external network port terminal r1 and a second external network port terminal r2 (the first external network port terminal r1 and the second external network port terminal r2 are used as examples for explanation). The transformer subunit T11 includes (in this embodiment, the uppermost transformer subunit T11 is described as follows):

[0066] The positive input terminal MX+ serves as the transformer input terminal of transformer subunit T11 and is connected to the first external network port terminal r1.

[0067] The negative input terminal MX- serves as the transformer input terminal of transformer subunit T11 and is connected to the second external network port terminal r2.

[0068] The positive output terminal TD+ serves as the first transformer output terminal of transformer subunit T11 and is connected to the first internal network port terminal n1.

[0069] The negative output terminal TD- serves as the first transformer output terminal of transformer subunit T11 and is connected to the second internal network port terminal n2.

[0070] The input intermediate terminal MCT serves as the second transformer output terminal of the transformer subunit T11 and is connected to the input terminal of the network power supply unit 10.

[0071] The output intermediate terminal TCT serves as the third transformer output terminal of transformer subunit T11 and is connected to the first terminal of the grounding resistor R.

[0072] In this embodiment, the network port transformer unit 10 includes a transformer chip T1. Both the external input network port J1 and the internal input network port J2 include twelve network port terminals, with only eight gateway terminals used for data or power transmission. Each pair of network port terminals connects to one transformer subunit T11 within the transformer chip T1, and the connections are made according to the correspondence between the network port terminals of the external input network port J1 and the internal input network port J2. For example, using the above description of one transformer subunit T11, each transformer subunit T11 includes an input positive terminal MX+, an input negative terminal MX-, an output positive terminal TD+, and an output... The negative terminal TD-, the input intermediate terminal MCT, and the output intermediate terminal TCT are connected in the above manner, enabling the transmission of communication signals from the input positive terminal MX+ and the input negative terminal MX- to the output positive terminal TD+ and the output negative terminal TD-. Simultaneously, the electrical energy from the input positive terminal MX+ and the input negative terminal MX- is transmitted to the network port power supply unit 10 through the input intermediate terminal MCT, and then output to the power supply interface 130 through the network port power supply unit 10, thereby realizing the communication and power supply of the display terminal 100. Here, PR12 refers to the tap of the data pair from the first external network port terminal r1 and the second external network port terminal r2. It is worth noting that the above is only a circuit connection diagram of the network port transformer unit 10. Different numbers of transformer sub-units T11 or different transformer chips T1 can be adaptively selected according to the number of network port terminals, which will not be described in detail here.

[0073] Furthermore, based on the first and / or second embodiments of this application described above, a third embodiment of the network port connection circuit for the display terminal of this application is proposed, with reference to... Figure 6 , Figure 6 This is a schematic diagram of a network port power supply unit in the network port connection circuit of the display terminal of this application. The network port power supply unit 20 includes two rectifier chips 21 and an output control subunit 22. The input terminal of the rectifier chip 21 is connected to the input intermediate terminal MCT of the transformer subunit T11 in the network port transformer unit 10. The output terminal of the rectifier chip 21 is connected to the input terminal of the output control subunit 22. The output terminal of the output control subunit 22 is connected to the power supply interface 130. The rectifier chip 21 includes two rectifier circuits. The first terminals of the two rectifier circuits are connected and then connected to the input terminal of the output control subunit 22. The second terminals of the two rectifier circuits are respectively connected to an input intermediate terminal MCT. The third terminals of the two rectifier circuits are connected.

[0074] In this embodiment, the network port power supply unit 20 connected to the input intermediate terminal MCT includes two rectifier chips 21. Because the input intermediate terminal MCT outputs two pairs of signals, two rectifier chips 21 are needed for processing. Each rectifier chip 21 contains two rectifier circuits, and each rectifier circuit is connected to a signal from one input intermediate terminal MCT. The connection method can be referred to... Figure 6 It is worth noting that, Figure 6 This is merely a schematic diagram of one connection between the rectifier chip 21 and the output control subunit 22. Other rectifier chips can also be used as replacements (as long as rectification can be performed; the rectifier chip 21 in this embodiment will be further described in detail below), and is not limited here.

[0075] In one embodiment, the rectifier circuit includes two rectifier sub-circuits 211 connected in series, each rectifier sub-circuit 211 comprising:

[0076] The first switch Q1 has its first terminal serving as the first terminal of the rectifier circuit, and its second terminal serving as the second terminal of the rectifier circuit.

[0077] The first capacitor C1 has its first terminal connected to the first terminal of the first switching transistor Q1, and its second terminal connected to the third terminal of the first switching transistor Q1.

[0078] The first resistor R1 has its first end connected to the first end of the first switch Q1, and its second end connected to the third end of the first switch Q1.

[0079] The first transistor Q2 has its first terminal connected to the third terminal of the first switching transistor Q1, and its second terminal serves as the third terminal of the rectifier circuit.

[0080] Diode sub-circuit 2111, the first terminal of diode sub-circuit 2111 is connected to the second terminal of the first switching transistor Q1, and the second terminal of diode sub-circuit 2111 is connected to the third terminal of the first transistor Q2;

[0081] The second capacitor C2 has its first terminal connected to the third terminal of the first transistor Q2, and its second terminal connected to the second terminal of the first transistor Q2.

[0082] The second resistor R2 has its first end connected to the third end of the first transistor Q2, and its second end connected to the second end of the first transistor Q2.

[0083] Furthermore, the input terminals of the output control sub-unit 22 include a positive voltage input terminal VDD and a negative voltage input terminal VSS. The diode sub-circuit 2111 includes two diodes connected in series, a first diode D1 and a second diode D2. When the first terminal of the first switch Q1 is connected to the positive voltage input terminal VDD, the cathode of the first diode D1 serves as the first terminal of the diode sub-circuit 2111, and the cathode of the second diode D2 serves as the second terminal of the diode sub-circuit 2111.

[0084] When the first terminal of the first switching transistor Q1 is connected to the negative voltage input terminal VSS, the anode of the first diode D1 serves as the first terminal of the diode sub-circuit 2111, and the anode of the second diode D2 serves as the second terminal of the diode sub-circuit 2111.

[0085] In this embodiment, the rectifier circuit includes two rectifier sub-circuits 211. Each rectifier sub-circuit 211 consists of a first switch Q1, a first capacitor C1, a first resistor R1, a first transistor Q2, a diode sub-circuit 2111, a second capacitor C2, and a second resistor R2, and their connection relationship is as described above. Furthermore, based on the different outputs of the first switch Q1 (the first terminal of the first switch Q1 is connected to the positive voltage input terminal VDD or to the negative voltage input terminal VSS), the internal connection relationship of the diode sub-circuit 2111 varies. For example, when the first terminal of the first switch Q1 is connected to the positive voltage input terminal VDD, the cathode of the first diode D1 serves as the first terminal of the diode sub-circuit 2111, and the cathode of the second diode D2 serves as the second terminal of the diode sub-circuit 2111. Conversely, when the first terminal of the first switch Q1 is connected to the negative voltage input terminal VSS, the anode of the first diode D1 serves as the first terminal of the diode sub-circuit 2111, and the anode of the second diode D2 serves as the second terminal of the diode sub-circuit 2111. The rectified voltage can then be output through the rectifier chip 21 to provide power to the subsequent display terminal 100.

[0086] Furthermore, based on the first, second, and / or third embodiments of this application described above, a fourth embodiment of the network port connection circuit of the display terminal of this application is proposed. The output control subunit 22 includes a third capacitor C3, a transformer Y, a fourth capacitor C4, and a third diode D3. The first terminal of the third capacitor C3, the first terminal of the transformer Y, the second terminal of the transformer Y, the first terminal of the fourth capacitor C4, and the cathode of the third diode D3 are sequentially connected to the positive voltage input terminal VDD in the output control subunit 22. The second terminal of the third capacitor C3, the third terminal of the transformer Y, the fourth terminal of the transformer Y, the second terminal of the fourth capacitor C4, and the anode of the third diode D3 are sequentially connected to the negative voltage input terminal VSS in the output control subunit 22.

[0087] In this embodiment, the output control subunit 22 includes a third capacitor C3, a transformer Y, a fourth capacitor C4, and a third diode D3. These components ensure the stability of the output power of the rectifier chip 21 and reduce fluctuations. The transformer Y can be a commonly used voltage regulator transformer, and is not limited here. The rectifier chip 21 is also connected to internal ports, such as the input impedance interface RIN and the parameter adjustment interface ADPT. Other ports can also be selected for connection as needed, and will not be described in detail here.

[0088] In one embodiment, reference is made to Figure 7 , Figure 7 This is another connection diagram of the network port power supply unit in the network port connection circuit of the display terminal of this application. The power supply interface 130 includes a positive terminal and a negative terminal. The output terminal of the output control subunit 22 includes a positive voltage output terminal and a negative voltage output terminal. The network port power supply unit 10 also includes:

[0089] The power supply interface chip U1 has its first terminal connected to the positive voltage output terminal and its second terminal connected to the negative voltage output terminal.

[0090] The DC-DC converter BT has its first input terminal connected to the third terminal of the power supply interface chip U1, its second input terminal grounded, its first output terminal connected to the positive terminal, and its second output terminal connected to the negative terminal.

[0091] Furthermore, the network port power supply unit 10 also includes:

[0092] The low voltage control chip U2 has its input terminal connected to the fourth terminal of the power supply interface chip U2, and its output terminal connected to the third input terminal of the DC-DC converter BT. The fourth input terminal of the DC-DC converter BT is also connected to the positive voltage output terminal.

[0093] In this embodiment, the network port power supply unit 10 also includes a power supply interface chip U1. The power supply interface chip U1 can adopt the TI TPS2373 solution, or other circuit solutions that comply with IEEE 802.3bt Power Device (PD). This solution can support a maximum input current of 1.85A at 57V, that is, a peak input power of up to 105.45W, which has sufficient margin compared to the 70W of a 43-inch 4K display terminal. In this embodiment, the TPS2373 chip is used for description. The meaning of the TPS2373 interface is not explained in detail here (refer to the existing definition of the TPS2373 chip interface meaning; VC in the figure is a high-level power supply). The TPS2373 chip is used to process the positive voltage output terminal and the negative voltage output terminal and output them to the DC-DC converter BT. The DC-DC converter BT can be a commonly used conversion chip. It only needs to implement the DC-DC conversion function. The voltage can be directly output to the power supply interface 130 based on the DC-DC converter BT to power the display terminal 100. Meanwhile, the network port power supply unit 10 also includes a low-voltage control chip U2, which can control the low-voltage output to achieve different output voltages. Of course, the low-voltage control chip U2 can also be set after the subsequent power supply interface 130 to control the output voltage of the power supply interface 130 to output different voltage values, so as to ensure the diversity of power supply to the display terminal. It is worth noting that the low-voltage control chip U2 can be a commonly used low-voltage chip, which is not limited here. Alternatively, a voltage divider resistor can be used to divide the output voltage to achieve the purpose of outputting different voltage values.

[0094] Based on the first and / or second embodiments of the network port connection circuit of the display terminal, this application also provides a network port connection device for the display terminal, which includes the network port connection circuit of the display terminal described above.

[0095] It is worth noting that, according to the network port connection device of the display terminal in this embodiment of the present invention (the specific structure of the network port connection device of the display terminal is not limited here, and the network port connection device of the display terminal at least includes the above-mentioned network port connection circuit of the display terminal), the network port connection device of the display terminal transmits the communication signal of the external input network port to the display terminal through the network port transformer unit, and at the same time connects the input terminal of the network port power supply unit to the second output terminal of the network port transformer unit to transmit the power of the external input network port to the display terminal. This avoids the phenomenon that the communication-related circuit and the power supply-related circuit need to be designed separately. This network port connection circuit of the display terminal transmits the communication signal of the external input network port to the display terminal through the network port transformer unit in the network port connection circuit, and at the same time connects the input terminal of the network port power supply unit to the second output terminal of the network port transformer unit to transmit the power of the external input network port to the display terminal. Thus, the power supply and communication of the display terminal can be realized simultaneously based on a single circuit.

[0096] The device provided in this application offers a novel network port connection circuit for a display terminal, enabling simultaneous power supply and communication for the display terminal based on a single circuit. Compared to the prior art, the beneficial effects of the device provided in this application are the same as those of the network port connection circuit for the display terminal provided in the above embodiments, and will not be elaborated upon here.

[0097] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A network port connection circuit for a display terminal, characterized in that, The network port connection circuit of the display terminal includes: A network port transformer unit, wherein the input end of the network port transformer unit is connected to an external input network port, and the first output end of the network port transformer unit is connected to the internal input network port of the display terminal, wherein the network port transformer unit is used to transmit the communication signal of the external input network port to the display terminal; A network port power supply unit is provided, wherein the input end of the network port power supply unit is connected to the second output end of the network port transformer unit, and the output end of the network port power supply unit is connected to the power supply interface of the display terminal, wherein the network port power supply unit transmits the power from the external input network port to the display terminal.

2. The network port connection circuit of the display terminal as described in claim 1, characterized in that, The external input network port includes multiple external network port terminals, and the internal input network port includes multiple internal network port terminals, wherein the number of external network port terminals is equal to the number of internal network port terminals. The network port transformer unit includes: A transformer chip, wherein the transformer chip includes multiple transformer sub-units, the number of transformer sub-units being equal to half the number of internal network port terminals, and one external network port terminal and one internal network port terminal are connected to one port of the transformer sub-unit; The transformer input terminal of the transformer subunit is connected to two external network ports, the first transformer output terminal of the transformer subunit is connected to two internal network ports, and the second transformer output terminal of the transformer subunit is connected to the input terminal of the network port power supply unit. A grounding resistor, the first end of which is connected to the third transformer output terminal of the transformer subunit; A grounding capacitor, wherein the first end of the grounding capacitor is connected to the second end of the grounding resistor, and the second end of the grounding capacitor is grounded.

3. The network port connection circuit of the display terminal as described in claim 2, characterized in that, The two internal network ports include a first internal network port terminal and a second internal network port terminal; the two external network ports include a first external network port terminal and a second external network port terminal; the transformer subunit includes: The positive input terminal serves as the transformer input terminal of the transformer subunit and is connected to the first external network port terminal. The negative input terminal serves as the transformer input terminal of the transformer subunit and is connected to the second external network port terminal. The positive output terminal serves as the first transformer output terminal of the transformer subunit and is connected to the first internal network port terminal. The negative output terminal serves as the first transformer output terminal of the transformer subunit and is connected to the second internal network port terminal. The input intermediate terminal serves as the second transformer output terminal of the transformer subunit and is connected to the input terminal of the network port power supply unit. The output intermediate terminal serves as the third transformer output terminal of the transformer subunit and is connected to the first terminal of the grounding resistor.

4. The network port connection circuit of the display terminal as described in claim 1, characterized in that, The network port power supply unit includes two rectifier chips and an output control subunit. The input terminal of the rectifier chip is connected to the input intermediate terminal of the transformer subunit in the network port transformer unit. The output terminal of the rectifier chip is connected to the input terminal of the output control subunit. The output terminal of the output control subunit is connected to the power supply interface. The rectifier chip includes two rectifier circuits. The first terminals of the two rectifier circuits are connected and then connected to the input terminal of the output control subunit. The second terminals of the two rectifier circuits are each connected to one of the input intermediate terminals. The third terminals of the two rectifier circuits are connected together.

5. The network port connection circuit of the display terminal as described in claim 4, characterized in that, The rectifier circuit includes two rectifier sub-circuits connected in series, each rectifier sub-circuit comprising: The first switching transistor has a first terminal serving as the first terminal of the rectifier circuit, and a second terminal serving as the second terminal of the rectifier circuit. A first capacitor, wherein a first terminal of the first capacitor is connected to a first terminal of the first switching transistor, and a second terminal of the first capacitor is connected to a third terminal of the first switching transistor; A first resistor, the first end of which is connected to the first end of the first switching transistor, and the second end of which is connected to the third end of the first switching transistor; The first transistor has its first terminal connected to the third terminal of the first switching transistor, and its second terminal serves as the third terminal of the rectifier circuit. A diode sub-circuit, wherein the first terminal of the diode sub-circuit is connected to the second terminal of the first switching transistor, and the second terminal of the diode sub-circuit is connected to the third terminal of the first transistor; The second capacitor has its first terminal connected to the third terminal of the first transistor, and its second terminal connected to the second terminal of the first transistor. The second resistor has its first end connected to the third end of the first transistor, and its second end connected to the second end of the first transistor.

6. The network port connection circuit of the display terminal as described in claim 5, characterized in that, The input terminals of the output control subunit include a positive voltage input terminal and a negative voltage input terminal. The diode subcircuit includes two diodes connected in series: a first diode and a second diode. When the first terminal of the first switching transistor is connected to the positive voltage input terminal, the cathode of the first diode serves as the first terminal of the diode subcircuit, and the cathode of the second diode serves as the second terminal of the diode subcircuit. When the first terminal of the first switching transistor is connected to the negative voltage input terminal, the anode of the first diode serves as the first terminal of the diode sub-circuit, and the anode of the second diode serves as the second terminal of the diode sub-circuit.

7. The network port connection circuit of the display terminal as described in claim 4, characterized in that, The output control subunit includes a third capacitor, a transformer, a fourth capacitor, and a third diode. The first terminal of the third capacitor, the first terminal of the transformer, the second terminal of the transformer, the first terminal of the fourth capacitor, and the cathode of the third diode are sequentially connected to the positive voltage input terminal of the output control subunit. The second terminal of the third capacitor, the third terminal of the transformer, the fourth terminal of the transformer, the second terminal of the fourth capacitor, and the anode of the third diode are sequentially connected to the negative voltage input terminal of the output control subunit.

8. The network port connection circuit of the display terminal as described in claim 4, characterized in that, The power supply interface includes a positive terminal and a negative terminal; the output terminal of the output control subunit includes a positive voltage output terminal and a negative voltage output terminal; the network port power supply unit further includes: A power supply interface chip, wherein a first terminal of the power supply interface chip is connected to the positive voltage output terminal, and a second terminal of the power supply interface chip is connected to the negative voltage output terminal; A DC-DC converter, wherein the first input terminal of the DC-DC converter is connected to the third terminal of the power supply interface chip, the second input terminal of the DC-DC converter is grounded, the first output terminal of the DC-DC converter is connected to the positive terminal, and the second output terminal of the DC-DC converter is connected to the negative terminal.

9. The network port connection circuit of the display terminal as described in claim 8, characterized in that, The network port power supply unit also includes: A low-voltage control chip is provided, wherein the input terminal of the low-voltage control chip is connected to the fourth terminal of the power supply interface chip, and the output terminal of the low-voltage control chip is connected to the third input terminal of the DC-DC converter. The fourth input terminal of the DC-DC converter is also connected to the positive voltage output terminal.

10. A network port connection device for a display terminal, characterized in that, The network port connection device of the display terminal includes the network port connection circuit of the display terminal as described in any one of claims 1 to 9.

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