CN218240124U - Switching circuit and switching device for high-voltage insulation test of display terminal - Google Patents

Abstract

The application relates to the field of signal interface switching, and discloses a switching circuit and a switching device of a display terminal high-voltage insulation test, wherein the circuit comprises: the device comprises a first serial port, a second serial port, an earphone serial port module, a USB module, an HDMI module, a VGA module and a system power ground; the first serial port with the HDMI module the VGA module with earphone serial port module connects, the second serial port with the VGA module connects, earphone serial port module with the HDMI module with the VGA module connects, system power ground respectively with first serial port the second serial port earphone serial port module the USB module the HDMI module with the VGA module connects. The application improves the testing efficiency of the high-voltage insulation test of the display terminal.

Description

Switching circuit and switching device for high-voltage insulation test of display terminal

Technical Field

The utility model relates to a signal interface switching field especially relates to a switching circuit and switching device of display terminal high voltage insulation test.

Background

Along with the high-speed development of display terminal interface technology, more and more interfaces are applied to the display terminal, and this has also proposed higher requirement to the switching between the different interfaces when carrying out high voltage insulation test, and traditional high voltage insulation test's switching mode is through designing different frock patch cords according to display terminal's different ports to test through the test patch cord that connects gradually test instrument to different frock patch cords. The switching mode of the high-voltage insulation test has great defects, different tooling switching lines need to be designed according to different ports of the display terminal, and the problem that the test switching lines are easy to damage due to repeated plugging and unplugging exists. Namely, the switching mode of the high-voltage insulation test causes low test efficiency due to the fact that the test patch cord needs to be plugged and pulled for many times.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a switching circuit and switching device of display terminal high voltage insulation test, aims at improving the efficiency of software testing of display terminal high voltage insulation test.

In order to achieve the purpose, the utility model provides a switching circuit for high-voltage insulation test of a display terminal, which comprises a first serial port, a second serial port, an earphone serial port module, a USB module, an HDMI module, a VGA module and a system power ground;

the first serial port with the HDMI module the VGA module with the earphone serial port module is connected, the second serial port with the VGA module is connected, the earphone serial port module with the HDMI module with the VGA module is connected, system power ground respectively with first serial port the second serial port the earphone serial port module the USB module the HDMI module with the VGA module is connected.

Optionally, the VGA module includes a first VGA port, a second VGA port, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor, the 15 th pin of the first VGA port is connected with one end of the first resistor, the other end of the first resistor is connected with the second serial port and the 15 th pin of the second VGA port, the 14 th pin of the first VGA port is connected with one end of the second resistor, the other end of the second resistor is connected with the 14 th pin of the second VGA port, the 13 th pin of the first VGA port is connected with one end of the third resistor, the other end of the third resistor is connected with the 13 th pin of the second VGA port, the 12 th pin of the first VGA port is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the 12 th pin of the second VGA port and the second VGA port, the 11 th pin of the first VGA port is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the first serial port, the earphone serial port module and the 11 th pin of the second VGA port, the 4 th pin of the first VGA port is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the first serial port, the earphone serial port module and the 4 th pin of the second VGA port, the 3 rd pin of the first VGA port is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the 3 rd pin of the second VGA port, the 2 nd pin of the first VGA port is connected with one end of the eighth resistor, the other end of the eighth resistor is connected with the 2 nd pin of the second VGA port, the 1 st pin of the first VGA port is connected with one end of the ninth resistor, the other end of the ninth resistor is connected with the 1 st pin of the second VGA port, the 5 th pin, the 10 th pin, the 8 th pin, the 7 th pin, the 6 th pin, the 16 th pin and the 17 th pin of the first VGA port are connected with the system power ground, and the 5 th pin, the 10 th pin, the 8 th pin, the 7 th pin, the 6 th pin, the 16 th pin and the 17 th pin of the second VGA port are connected with the system power ground.

Optionally, the second serial port includes a second serial port, the 2 nd pin of the second serial port is connected to the system power ground, the 3 rd pin of the second serial port is connected to the first VGA port or the 15 th pin of the second VGA port, the 4 th pin of the second serial port is connected to the first VGA port or the 12 th pin of the second VGA port.

Optionally, the earphone serial port module includes an earphone port, a first earphone resistor and a second earphone resistor, the 3 rd pin of the earphone port is connected to the system power ground, the 1 st pin of the earphone port is connected to one end of the first earphone resistor, the other end of the first earphone resistor is connected to the 11 th pin of the first VGA port, the 2 nd pin of the earphone port is connected to one end of the second earphone resistor, and the other end of the second earphone resistor is connected to the 4 th pin of the first VGA port.

Optionally, the first serial port includes first serial port, first serial resistance and second serial resistance, the 1 st foot of first serial port with the 2 nd foot of HDMI port is connected, the 2 nd foot of first serial port with system's power ground is connected, the 3 rd foot of first serial port with the one end of first serial resistance is connected, the other end of first serial resistance respectively with the 15 th foot of HDMI port with the 4 th foot of first VGA port is connected, the 4 th foot of first serial port with the one end of second serial resistance is connected, the other end of second serial resistance respectively with the 16 th foot of HDMI port with the 11 th foot of first VGA port is connected.

Optionally, the HDMI module includes a first HDMI port, a second HDMI port, a first port resistor, a second port resistor, a third port resistor, a fourth port resistor, a fifth port resistor, a sixth port resistor, a seventh port resistor, an eighth port resistor, a ninth port resistor, a tenth port resistor, an eleventh port resistor, a twelfth port resistor, and a thirteenth port resistor, where the 1 st pin of the first HDMI port is connected to one end of the first port resistor, the other end of the first port resistor is connected to the 1 st pin of the second HDMI port, the 2 nd pin of the first HDMI port is connected to one end of the second port resistor and the first serial port, the other end of the second port resistor is connected to the 2 nd pin of the second HDMI port, the 3 rd pin of the first HDMI port is connected to one end of the third port resistor, the other end of the third port resistor is connected with the 3 rd pin of the second HDMI port, the 4 th pin of the first HDMI port is connected with one end of the fourth port resistor, the other end of the fourth port resistor is connected with the 4 th pin of the second HDMI port, the 6 th pin of the first HDMI port is connected with one end of the fifth port resistor, the other end of the fifth port resistor is connected with the 6 th pin of the second HDMI port, the 7 th pin of the first HDMI port is connected with one end of the sixth port resistor, the other end of the sixth port resistor is connected with the 7 th pin of the second HDMI port, the 9 th pin of the first HDMI port is connected with one end of the seventh port resistor, the other end of the seventh port resistor is connected with the 9 th pin of the second HDMI port, the 10 th pin of the first HDMI port is connected with one end of the eighth port resistor, the other end of the eighth port resistor is connected with the 10 th pin of the second HDMI port, the 12 th pin of the first HDMI port is connected with one end of the ninth port resistor, the other end of the ninth port resistor is connected with the 12 th pin of the second HDMI port, the 13 th pin of the first HDMI port is connected with one end of the tenth port resistor, the other end of the tenth port resistor is connected with the 13 th pin of the second HDMI port, the 14 th pin of the first HDMI port is connected with one end of the eleventh port resistor, the other end of the eleventh port resistor is connected with the 14 th pin of the second HDMI port, the 15 th pin of the first HDMI port is connected with one end of the twelfth port resistor and the first serial port, the other end of the twelfth port resistor is connected with the 15 th pin of the second HDMI port, the 16 th pin of the first HDMI port is connected with one end of the thirteenth port resistor and the first string, the other end of the thirteenth port resistor is connected with the 16 th pin of the second HDMI port, the 18 th pin of the first HDMI port is connected with the 18 th pin of the second HDMI port, the 19 th pin of the first HDMI port is connected with the 19 th pin of the second HDMI port, the 5 th, 8 th, 11 th, 17 th, 20 th, 21 st, 22 th and 23 th pins of the first HDMI port are connected with the system power ground, and the 5 th, 8 th, 11 th, 17 th, 20 th, 21 st, 22 th and 23 th pins of the second HDMI port are connected with the system power ground.

Optionally, the USB module includes a first USB port, a second USB port, a first USB resistor and a second USB resistor, the 1 st pin of the first USB port is connected to the 1 st pin of the second USB port, the 2 nd pin of the first USB port is connected to one end of the first USB resistor, the other end of the first USB resistor is connected to the 2 nd pin of the second USB port, the 3 rd pin of the first USB port is connected to one end of the second USB resistor, the other end of the second USB resistor is connected to the 3 rd pin of the second USB port, the 4 th pin, the 5 th pin and the 6 th pin of the first USB port are connected to the system power ground, and the 4 th pin, the 5 th pin and the 6 th pin of the second USB port are connected to the system power ground.

In addition, this application still provides a switching device, and switching device includes the aforesaid switching circuit of display terminal high voltage insulation test.

Optionally, the switching device includes a circuit board, and the switching circuit for the high-voltage insulation test of the display terminal is arranged on a component surface of the circuit board.

Optionally, the switching device still includes insulating piece and plastic backing plate, the insulating piece is pasted on the plastic backing plate, the plastic backing plate is fixed in on the face of weld of circuit board.

The application provides a switching circuit for a high-voltage insulation test of a display terminal, which comprises a first serial port, a second serial port, an earphone serial port module, a USB module, an HDMI module, a VGA module and a system power ground; the first serial port with the HDMI module the VGA module with earphone serial port module connects, the second serial port with the VGA module with earphone serial port module connects, earphone serial port module with the HDMI module with the VGA module is connected, the HDMI module with the VGA module connects, system power ground respectively with first serial port the second serial port earphone serial port module the USB module the HDMI module with the VGA module connects. The connection is established between each module of the switching circuit through the high-voltage insulation test of the display terminal, and then data transmission between different modules in the switching circuit of the high-voltage insulation test of the display terminal can be realized, and the switching circuit is convenient for being directly connected with a system power ground through a USB module to carry out the high-voltage insulation test, one end can be fixed, a test instrument is connected without repeated plugging, and the circuit contains a plurality of interfaces, so that different switching wires are not needed to be used, thereby avoiding that different tooling switching wires are needed to be designed during the high-voltage insulation test in the prior art, and the phenomenon of plugging the test switching wires for a plurality of times occurs, and the data transmission is directly carried out between different modules in the switching circuit through the high-voltage insulation test of the display terminal, so that the test efficiency of the high-voltage insulation test can be improved.

Drawings

Fig. 1 is a schematic structural diagram of the switching circuit for high-voltage insulation test of the display terminal of the present invention;

fig. 2 is a schematic diagram of a second serial port connection in the switching circuit for the high-voltage insulation test of the display terminal of the present invention;

fig. 3 is a schematic diagram illustrating connection of a VGA module in the switching circuit for high-voltage insulation test of the display terminal of the present invention;

fig. 4 is a schematic diagram showing connection of the earphone serial port module in the switching circuit for high-voltage insulation test of the display terminal of the present invention;

fig. 5 is a schematic diagram illustrating a first serial port connection in the switching circuit for the high-voltage insulation test of the display terminal according to the present invention;

fig. 6 is a schematic diagram illustrating the connection of the HDMI module in the switching circuit for high-voltage insulation test of the display terminal according to the present invention;

fig. 7 is a schematic diagram illustrating the connection of the USB module in the switching circuit for high voltage insulation test of the display terminal according to the present invention;

FIG. 8 shows a connection diagram of the high-voltage insulation test of the switching circuit for the high-voltage insulation test of the display terminal of the present invention;

FIG. 9 shows a software upgrade connection diagram of a switching circuit for high-voltage insulation test of a display terminal;

fig. 10 shows a signal transmission connection diagram of a switching circuit for high-voltage insulation test of a display terminal.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the present embodiment are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The utility model provides a switching circuit of display terminal high voltage insulation test, refer to the structural schematic diagram of the switching circuit of display terminal high voltage insulation test of FIG. 1, the switching circuit of display terminal high voltage insulation test includes first serial ports 10, second serial ports 20, earphone serial port module 30, USB module 40, HDMI module 60, VGA module 50 and system power ground 70;

first serial port 10 with HDMI module 60 VGA module 50 with earphone serial port module 30 connects, second serial port 20 with VGA module 50 with earphone serial port module 30 connects, earphone serial port module 30 with HDMI module 60 with VGA module 50 connects, system power ground 70 respectively with first serial port 10 second serial port 20 earphone serial port module 30 USB module 40 HDMI module 60 with VGA module 50 connects.

In this embodiment, the first serial port 10, the second serial port 20, the headphone serial port module 30, the USB module 40, the HDMI module 60, and the VGA module 50 all refer to component modules in the circuit, for example, the second serial port 20 refers to a serial port interface of a corresponding component, and the HDMI module 60 refers to a corresponding HDMI interface. When the high-voltage insulation test of the display terminal is carried out, an output test wire of a high-voltage insulation test instrument is inserted into any interface of the adapter plate USB1 or USB2 (a common wire of the instrument is a USB adapter wire), one end of the required adapter wire is inserted into other interfaces (except the interface connected with the instrument) of the adapter plate, the other end of the required adapter wire is inserted into the corresponding interface of the tested machine, and then the test is carried out according to the standard operation. Namely, the high-voltage insulation test instrument is connected through a USB1 or a USB2 (instrument output line), and the other end of the high-voltage insulation test instrument is selectively connected with a high-voltage switching line in the circuit according to a high-voltage switching port of a television or a display PCB (printed circuit board), wherein the high-voltage switching line can be an HDMI (high-definition multimedia interface) line, a VGA (video graphics array) line or a USB (universal serial bus) line. Referring to fig. 8, fig. 8 is a connection diagram of a high-voltage insulation test of a switching circuit for a high-voltage insulation test of a display terminal, and the switching board in the diagram is the switching device in the present embodiment. When the operation method of upgrading and switching the television and the display is carried out, according to the definition of the upgrading port of the television and the display PCB, the serial port 1 or the serial port 2 of the adapter plate is selected, the serial port of the upgrading small plate is connected through a 4PIN adapter wire, then the corresponding HDMI, earphone or VGA wire is selected to connect the upgrading port of the adapter plate with the upgrading port of the television or the display, and finally the computer is used for upgrading according to the operation method. Namely, the 4PIN wire of the serial port is connected with the upgrade patch board, the upgrade patch board is connected with the upgrade computer, and the other end of the upgrade patch cord is connected with the upgrade patch cord of the corresponding interface in the circuit according to the upgrade port of the television or the display PCB. Referring to fig. 9, fig. 9 is a connection diagram showing the software upgrade of the adapting circuit for the high-voltage insulation test of the terminal. When the adapter plate is used for signal transmission and switching of the USB, the VGA and the HDMI, a corresponding adapter wire is selected according to the television or the display and the used instrument, and then the adapter plates of 2 serially connected USB, VGA or HDMI wires are serially connected between the television or the display and the adapter plate, so that the signal of the instrument is transmitted to the television or the display. The USB, VGA and HDMI patch cord in the circuit is directly connected to a test instrument and a television or a display PCB board through the circuit. Referring to fig. 10, fig. 10 is a signal transmission connection diagram of the adapting circuit for the high voltage insulation test of the display terminal. The high-voltage testing, upgrading and signal transmission can be realized, the cost is saved, and the testing efficiency is improved without pulling and plugging the patch cord.

Further, in another embodiment of the present application, referring to fig. 3, fig. 3 is a schematic diagram illustrating a connection of a VGA module in the switching circuit for high-voltage insulation test of the display terminal, where the VGA module includes a first VGA port VGA1, a second VGA port VGA2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9, the 15 th pin of the first VGA port VGA1 is connected to one end of the first resistor R1, which is far away from the 15 th pin of the first VGA port VGA1, is connected to the second serial port 20 and the 15 th pin of the second VGA port VGA2, the 14 th pin of the first VGA port 1 is connected to one end of the second resistor R2, which is far away from the 14 th pin of the first VGA port VGA1, is connected to the second VGA port 14 th pin of the VGA2, the 13 th pin of the first VGA port VGA1 is connected with one end of the third resistor R3, the one end of the 13 th pin of the first VGA port VGA1 which is far away from the third resistor R3 is connected with the 13 th pin of the second VGA port VGA2, the 12 th pin of the first VGA port VGA1 is connected with one end of the fourth resistor R4, the one end of the 12 th pin of the first VGA port VGA1 which is far away from the fourth resistor R4 is connected with the second serial port 20 and the 12 th pin of the second VGA2, the 11 th pin of the first VGA port VGA1 is connected with one end of the fifth resistor R5, the one end of the 11 th pin of the first VGA port VGA1 which is far away from the fifth resistor R5 is connected with the first serial port 10, the earphone serial port module 30 and the 11 th pin of the second VGA2, the 4 th pin of the first VGA port VGA1 is connected with one end of the sixth resistor VGA R6, the sixth resistor R6 is connected with the first serial port 10, the earphone serial port module 30 and the 4 th pin of the second VGA2, the 3 rd pin of the first VGA port VGA1 is connected with one end of the seventh resistor R7, the seventh resistor R7 is connected with the 3 rd pin of the second VGA port VGA2, the 2 nd pin of the first VGA1 is connected with one end of the eighth resistor R8, the eighth resistor R8 is connected with the 2 nd pin of the second VGA port VGA2, the 1 st foot of first VGA port VGA1 with the one end of ninth resistance R9 is connected, ninth resistance R9 is kept away from the one end of the 1 st foot of first VGA port VGA1 with the 1 st foot of second VGA port VGA2 is connected, the 5 th foot, the 10 th foot, the 8 th foot, the 7 th foot, the 6 th foot, the 16 th foot, the 17 th foot of first VGA1 with system power ground 70 connects, the 5 th foot, the 10 th foot, the 8 th foot, the 7 th foot, the 6 th foot, the 16 th foot, the 17 th foot of second VGA port VGA2 with system power ground 70 connects.

In this embodiment, first HDMI port HDMI1, second HDMI port HDMI2 are connected, can guarantee to carry out the intermediate transfer through two HDMI ports, can pass through switching circuit extension connecting wire under the not enough condition of connecting wire length, and system power ground 70 has still been connected, can directly receive the HDMI port interface when needing the HDMI interface and carry out high-voltage insulation test instrument and test, consequently need not design different frock patch cords and realize the purpose of test, can reduce expenditure cost and efficiency of software testing. And the first serial port 10, the VGA module 50 and the earphone serial port module 30 are connected, so that data transfer among the first serial port 10, the VGA module 50, the earphone serial port module 30 and the two HDMI port interfaces can be realized, the actual transfer efficiency is improved, and transfer resources are saved.

Further, in another embodiment of the present application, in the switching circuit for high-voltage insulation test of the display terminal, referring to fig. 2, fig. 2 is a schematic diagram of a second serial port connection in the switching circuit for high-voltage insulation test of the display terminal, where the second serial port includes a second serial port CN2, a2 nd pin of the second serial port CN2 is connected to the system power ground 70, a 3 rd pin of the second serial port CN2 is connected to the second VGA port VGA2 or the 15 th pin of the first VGA port VGA1, and a 4 th pin of the second serial port CN2 is connected to the second VGA port VGA2 or the 12 th pin of the first VGA port VGA 1.

In this embodiment, the second serial port CN2 is connected to the VGA module 50 and the headphone serial port module 30, so that data transfer between the VGA module 50 and the headphone serial port module 30 and the second serial port CN2 interface can be realized, the actual transfer efficiency is improved, and the transfer resources are saved. The connection of the 4 th pin of the second serial port CN2 and the 12 th pin of the second VGA port VGA2 or the first VGA port VGA1 shows that signals can be communicated between the two VGA ports and are irrelevant to the connection of the two ends of the resistor between the two VGA ports, and the function of the resistor of the circuit is irrelevant to information transmission, so that the connection between the same pins of the two subsequent ports has no influence no matter on the left or the right of the connection resistors between the two VGA ports. The second serial port CN2 is a patch cord, which can realize data downloading and updating, and transmit the downloaded and updated data to the interface connected thereto, so as to realize data updating and downloading of the device connected to the interface.

Further, in this application display terminal high voltage insulation test's switching circuit still embodiment, refer to fig. 4, fig. 4 is the switching circuit of display terminal high voltage insulation test in the earphone serial module connection schematic diagram, earphone serial module includes earphone port J1, first earphone resistance RJ1 and second earphone resistance RJ2, earphone port J1's 3 rd foot with system's power ground 70 is connected, earphone port J1's 1 st foot with first earphone resistance RJ 1's one end is connected, first earphone resistance RJ1 keeps away from earphone port J1's 1 st foot one end with first VGA port VGA 1's 11 th foot is connected, earphone port J1's 2 nd foot with second earphone resistance RJ 2's one end is connected, second earphone resistance RJ2 keeps away from earphone port J1's 2 nd foot one end with first VGA port VGA 1's 4 th foot is connected.

In this embodiment, the HDMI module 60, the first serial port CN1, the VGA module 50, and the second serial port CN2 are connected to the headphone port J1, so that data transfer between the HDMI module 60, the first serial port CN1, the VGA module 50, the second serial port CN2, and the headphone port J1 can be realized, the efficiency of actual transfer is improved, and transfer resources are saved.

Further, in another embodiment of the present application, referring to fig. 5, fig. 5 is a schematic diagram illustrating connection of a first serial port in a switching circuit for high-voltage insulation testing of a display terminal, where the first serial port includes a first serial port CN1, a first serial port resistor RC1 and a second serial port resistor RC2, a1 st pin of the first serial port CN1 is connected to the HDMI module 60, a2 nd pin of the first serial port CN1 is connected to the system power ground 70, a 3 rd pin of the first serial port CN1 is connected to one end of the first serial port resistor RC1, which is far away from the 3 rd pin of the first serial port CN1, is connected to the HDMI module 60 and a 4 th pin of the first VGA port VGA1, a 4 th pin of the first serial port CN1 is connected to one end of the second resistor RC2, and one end of the second serial port resistor RC2, which is far away from the 4 th pin of the first serial port CN1, is connected to the first serial port 60 and the first VGA 1.

In this embodiment, the first serial port CN1 is connected to the HDMI module 60, the VGA module 50 and the headphone serial port module 30, so that data transfer between the HDMI module 60, the VGA module 50 and the headphone serial port module 30 and the first serial port CN1 interface can be realized, the actual transfer efficiency is improved, and the transfer resources are saved. And the first serial port CN1 is a patch cord, can realize data downloading and updating, and transmits the downloaded and updated data to the corresponding interface connected with the first serial port to realize the data updating and downloading of the equipment connected with the interface.

Further, in another embodiment of the switching circuit for high voltage insulation test of the display terminal of the present application, referring to fig. 6, fig. 6 is a schematic diagram of connection of an HDMI module in the switching circuit for high voltage insulation test of the display terminal, where the HDMI module includes a first HDMI port HDMI1, a second HDMI port HDMI2, a first port resistor RH1, a second port resistor RH2, a third port resistor RH3, a fourth port resistor RH4, a fifth port resistor RH5, a sixth port resistor RH6, a seventh port resistor RH7, an eighth port resistor RH8, a ninth port resistor RH9, a tenth port resistor RH10, an eleventh port resistor RH11, a twelfth port resistor RH12 and a thirteenth port resistor RH13, the first HDMI port HDMI1 is connected to one end of the first port resistor RH1, the first port resistor RH1 is far away from the first HDMI port 1 and the second HDMI port 1 are connected to the first port resistor RH1 of the first HDMI port 1, the first port resistor RH1 is far away from the first HDMI port resistor RH1 of the first HDMI port 1 and the second HDMI port resistor RH3, the first HDMI port resistor RH3 is far away from the second port resistor RH4, the first HDMI port resistor RH1 is far away from the HDMI port terminal RH3, the HDMI port terminal RH3 is far away from the first HDMI port terminal RH4 is connected to the first HDMI port resistor RH4, the fifth port resistor RH5 is connected to the 6 th pin of the second HDMI port HDMI2 at a position far away from the 6 th pin of the first HDMI port HDMI1, the 7 th pin of the first HDMI port HDMI1 is connected to one end of the sixth port resistor RH6, the sixth port resistor RH6 is connected to the 7 th pin of the second HDMI port HDMI1 at a position far away from the 7 th pin of the first HDMI port HDMI1, the 9 th pin of the first HDMI port HDMI1 is connected to one end of the seventh port resistor RH7, the seventh port resistor RH7 is connected to the 9 th pin of the second HDMI port HDMI2 at a position far away from the 9 th pin of the first HDMI port HDMI1, the 10 th pin of the first HDMI port HDMI1 is connected to one end of the eighth port resistor RH8, the eighth port resistor RH8 is connected to the 10 th pin of the second HDMI port HDMI1 at a position far away from the 10 th pin of the first HDMI port HDMI1, and the ninth port resistor RH12 is connected to the 9 th pin of the second HDMI port HDMI2, the ninth port resistor RH9 is far from the end of the 12 th pin of the first HDMI port HDMI1 and connected with the 12 th pin of the second HDMI port HDMI2, the 13 th pin of the first HDMI port HDMI1 and the end of the tenth port resistor RH10 are connected, the tenth port resistor RH10 is far from the end of the 13 th pin of the first HDMI port HDMI1 and connected with the 13 th pin of the second HDMI port HDMI2, the 14 th pin of the first HDMI port HDMI1 and connected with the end of the eleventh port resistor RH11, the eleventh port resistor RH11 is far from the end of the 14 th pin of the first HDMI port HDMI1 and connected with the 14 th pin of the second HDMI port HDMI2, the 15 th pin of the first HDMI port and the end of the twelfth port resistor RH12 and connected with the first serial port, the twelfth port resistor RH12 is far from the end of the 15 th pin of the first HDMI port HDMI1 and connected with the second serial port HDMI2 15 feet are connected, the 16 th foot of the first HDMI port HDMI1 is connected with one end of the thirteenth port resistor RH13 and the first serial port, the thirteenth port resistor RH13 is far away from one end of the 16 th foot of the first HDMI port HDMI1 and is connected with the 16 th foot of the second HDMI port HDMI2, the 18 th foot of the first HDMI port HDMI1 is connected with the 18 th foot of the second HDMI port HDMI2, the 19 th foot of the first HDMI port HDMI1 is connected with the 19 th foot of the second HDMI port HDMI2, the 5 th foot, the 8 th foot, the 11 th foot, the 17 th foot, the 20 th foot, the 21 st foot, the 22 th foot and the 23 th foot of the first HDMI port HDMI1 are connected with the system power ground 70, and the 5 th foot, the 8 th foot, the 11 th foot, the 17 th foot, the 20 th foot, the 21 st foot, the 22 th foot and the 23 th foot of the second HDMI port HDMI2 are connected with the system power ground 70.

In this embodiment, first HDMI port HDMI1, second HDMI port HDMI2 are connected, can guarantee to carry out the intermediate transfer through two HDMI ports, can pass through switching circuit extension connecting wire under the not enough condition of connecting wire length, and system power ground 70 has still been connected, can directly receive the HDMI port interface when needing the HDMI interface and carry out high-voltage insulation test instrument and test, consequently need not design different frock patch cords and realize the purpose of test, can reduce expenditure cost and efficiency of software testing. And the first serial port 10, the VGA module 50 and the earphone serial port module 30 are connected, so that data transfer among the first serial port 10, the VGA module 50, the earphone serial port module 30 and the two HDMI port interfaces can be realized, the actual transfer efficiency is improved, and transfer resources are saved.

Further, in another embodiment of the present application, referring to fig. 7, fig. 7 is a schematic diagram illustrating a connection of a USB module in the transfer circuit for high voltage insulation testing of a terminal, where the USB module includes a first USB port USB1, a second USB port USB2, a first USB resistor RU1 and a second USB resistor RU2, the 1 st pin of the first USB port USB1 is connected to the 1 st pin of the second USB port USB2, the 2 nd pin of the first USB port USB1 is connected to one end of the first USB resistor RU1, which is far away from the 2 nd pin of the first USB port USB1, is connected to the 2 nd pin of the second USB port USB2, the 3 rd pin of the first USB port USB1 is connected to one end of the second USB resistor RU2, which is far away from the 3 rd pin of the first USB port USB1, is connected to the 3 rd pin of the second USB port USB2, the first USB port USB1, the second USB terminal pin 4, the second USB terminal pin 5, the second USB terminal pin 70, the second terminal pin 70, and the second terminal pin 70.

In this embodiment, the first USB port USB1 and the second USB port USB2 are connected to ensure intermediate transfer through the two USB ports, and the connection line can be lengthened through the transfer circuit under the condition that the length of the connection line is insufficient, and the first USB port USB1 and the second USB port USB2 are connected to the system power ground 70, and can be connected to a high-voltage insulation test instrument through the first USB port USB1 or the second USB port USB2 for testing, so that different tooling patch cords do not need to be designed to achieve the purpose of testing, and the expenditure cost and the testing efficiency can be reduced.

In addition, this application still provides a switching device, and switching device includes the switching circuit of display terminal high voltage insulation test.

Specifically, the switching device comprises a circuit board, and the switching circuit for the high-voltage insulation test of the display terminal is arranged on an element surface of the circuit board.

Specifically, switching device still includes insulating piece and plastic backing plate, the insulating piece pastes on the plastic backing plate, the plastic backing plate is fixed in on the face of weld of circuit board.

In this embodiment, the adapter device includes a circuit board, an insulating sheet and a plastic backing plate, wherein the circuit board is selected from a 60mmx80mmx1.6mm PCB printed board. The component surface of the circuit board is provided with a switching circuit for high-voltage insulation test of the display terminal, wherein the component comprises 2 VGA terminals (upper right position and lower right position), 2 USB terminals (upper middle position and lower middle position), 2 HDMI terminals (lower left position and upper left position), 2 4PIN sockets (lower middle position of the circuit board), 1 earphone terminal (close to the position beside the lower left HDMI terminal), and 2 100 omega patch resistors (a first earphone resistor RJ1 and a second earphone resistor RJ2 in the switching circuit for high-voltage insulation test of the display terminal); 26 2.2 omega patch resistances. The switching device has still included the switching wire rod, and the switching wire rod includes 2 USB patch cords, 2 VGA patch cords, 2 HDMI patch cords, 2 4PIN patch cords (select the line preface according to actual conditions, connect the serial ports), 1 earphone patch cord. The test and data transmission can be carried out without plugging and unplugging the transmission line, the test efficiency and the utilization rate of the transmission line are improved, and the cost can be reduced by reducing the damage of the transmission line.

It is also noted that the adapter device further comprises a backing plate and an insulating sheet: 80mmX100mmX2mm plastic pad and 60mmX80mm insulation sheet. The insulating piece is pasted on the plastic base plate, and then the welding surface of the circuit board of the switching device is fixed on the base plate by using silica gel, so that the safety of a high-voltage insulation test is ensured. The innovative key of the switching device for the high-voltage insulation test of the display terminal is that different ports can be selected for testing different televisions and displays in the high-voltage insulation test, so that the output line of a high-voltage insulation test instrument is prevented from being damaged or tooling of the output lines of different instruments is avoided; and meanwhile, the switching problem of the software upgrading port is solved. The device is also suitable for the high-voltage insulation test of different televisions and displays and the switching of software upgrading serial ports, is also suitable for the signal transmission switching of USB, VGA and HDMI, and improves the production efficiency.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.

Claims (10)

1. A switching circuit for a high-voltage insulation test of a display terminal is characterized by comprising a first serial port, a second serial port, an earphone serial port module, a USB module, an HDMI module, a VGA module and a system power ground;

the first serial port with the HDMI module the VGA module with the earphone serial port module is connected, the second serial port with the VGA module is connected, the earphone serial port module with the HDMI module with the VGA module is connected, system power ground respectively with first serial port the second serial port the earphone serial port module the USB module the HDMI module with the VGA module is connected.

2. The switching circuit for high voltage insulation testing of a display terminal according to claim 1, wherein the VGA module comprises a first VGA port, a second VGA port, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor, a 15 th pin of the first VGA port is connected to one end of the first resistor, the other end of the first resistor is connected to the second serial port and the 15 th pin of the second VGA port, a 14 th pin of the first VGA port is connected to one end of the second resistor, the other end of the second resistor is connected to a 14 th pin of the second VGA port, a 13 th pin of the first VGA port is connected to one end of the third resistor, the other end of the third resistor is connected to a 13 th pin of the second VGA port, a 12 th pin of the first VGA port is connected to one end of the fourth resistor, the other end of the fourth resistor is connected with the second serial port and the 12 th pin of the second VGA port, the 11 th pin of the first VGA port is connected with one end of the fifth resistor, the other end of the fifth resistor is connected with the first serial port, the earphone serial port module and the 11 th pin of the second VGA port, the 4 th pin of the first VGA port is connected with one end of the sixth resistor, the other end of the sixth resistor is connected with the first serial port, the earphone serial port module and the 4 th pin of the second VGA port, the 3 rd pin of the first VGA port is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the 3 rd pin of the second VGA port, the 2 nd pin of the first VGA port is connected with one end of the eighth resistor, and the other end of the eighth resistor is connected with the 2 nd pin of the second VGA port, the 1 st foot of first VGA port with the one end of ninth resistance is connected, the other end of ninth resistance with the 1 st foot of second VGA port is connected, the 5 th foot, the 10 th foot, the 8 th foot, the 7 th foot, the 6 th foot, the 16 th foot, the 17 th foot of first VGA port with system power ground is connected, the 5 th foot, the 10 th foot, the 8 th foot, the 7 th foot, the 6 th foot, the 16 th foot, the 17 th foot of second VGA port with system power ground is connected.

3. The switching circuit for high-voltage insulation test of display terminal according to claim 2, wherein the second serial port comprises a second serial port, a2 nd pin of the second serial port is connected to the system power ground, a 3 rd pin of the second serial port is connected to the 15 th pin of the first VGA port or the second VGA port, and a 4 th pin of the second serial port is connected to the 12 th pin of the first VGA port or the second VGA port.

4. The switching circuit for high-voltage insulation test of a display terminal according to claim 3, wherein the earphone serial port module comprises an earphone port, a first earphone resistor and a second earphone resistor, the 3 rd pin of the earphone port is connected to the system power ground, the 1 st pin of the earphone port is connected to one end of the first earphone resistor, the other end of the first earphone resistor is connected to the 11 th pin of the first VGA port, the 2 nd pin of the earphone port is connected to one end of the second earphone resistor, and the other end of the second earphone resistor is connected to the 4 th pin of the first VGA port.

5. The switching circuit for high-voltage insulation test of the display terminal as claimed in claim 4, wherein the first serial port includes a first serial port, a first serial resistor and a second serial resistor, the 1 st pin of the first serial port is connected to the 2 nd pin of the HDMI port, the 2 nd pin of the first serial port is connected to the system power ground, the 3 rd pin of the first serial port is connected to one end of the first serial resistor, the other end of the first serial resistor is connected to the 15 th pin of the HDMI port and the 4 th pin of the first VGA port, the 4 th pin of the first serial port is connected to one end of the second serial resistor, and the other end of the second serial resistor is connected to the 16 th pin of the HDMI port and the 11 th pin of the first VGA port.

6. The switching circuit for high voltage insulation test of display terminal according to claim 5, wherein the HDMI module comprises a first HDMI port, a second HDMI port, a first port resistor, a second port resistor, a third port resistor, a fourth port resistor, a fifth port resistor, a sixth port resistor, a seventh port resistor, an eighth port resistor, a ninth port resistor, a tenth port resistor, an eleventh port resistor, a twelfth port resistor and a thirteenth port resistor, wherein the 1 st pin of the first HDMI port is connected to one end of the first port resistor, the other end of the first port resistor is connected to the 1 st pin of the second HDMI port, the 2 nd pin of the first HDMI port is connected to one end of the second port resistor and the first serial port, and the other end of the second port resistor is connected to the 2 nd pin of the second HDMI port, the 3 rd pin of the first HDMI port is connected with one end of the third port resistor, the other end of the third port resistor is connected with the 3 rd pin of the second HDMI port, the 4 th pin of the first HDMI port is connected with one end of the fourth port resistor, the other end of the fourth port resistor is connected with the 4 th pin of the second HDMI port, the 6 th pin of the first HDMI port is connected with one end of the fifth port resistor, the other end of the fifth port resistor is connected with the 6 th pin of the second HDMI port, the 7 th pin of the first HDMI port is connected with one end of the sixth port resistor, the other end of the sixth port resistor is connected with the 7 th pin of the second HDMI port, the 9 th pin of the first HDMI port is connected with one end of the seventh port resistor, and the other end of the seventh port resistor is connected with the 9 th pin of the second HDMI port, the 10 th pin of the first HDMI port is connected to one end of the eighth port resistor, the other end of the eighth port resistor is connected to the 10 th pin of the second HDMI port, the 12 th pin of the first HDMI port is connected to one end of the ninth port resistor, the other end of the ninth port resistor is connected to the 12 th pin of the second HDMI port, the 13 th pin of the first HDMI port is connected to one end of the tenth port resistor, the other end of the tenth port resistor is connected to the 13 th pin of the second HDMI port, the 14 th pin of the first HDMI port is connected to one end of the eleventh port resistor, the other end of the eleventh port resistor is connected to the 14 th pin of the second HDMI port, the 15 th pin of the first HDMI port is connected to one end of the twelfth port resistor and the first serial port, the other end of the twelfth port resistor is connected with the 15 th pin of the second HDMI port, the 16 th pin of the first HDMI port is connected with one end of the thirteenth port resistor and the first string, the other end of the thirteenth port resistor is connected with the 16 th pin of the second HDMI port, the 18 th pin of the first HDMI port is connected with the 18 th pin of the second HDMI port, the 19 th pin of the first HDMI port is connected with the 19 th pin of the second HDMI port, the 5 th, 8 th, 11 th, 17 th, 20 th, 21 st, 22 th and 23 th pins of the first HDMI port are connected with the system power ground, and the 5 th, 8 th, 11 th, 17 th, 20 th, 21 st, 22 th and 23 th pins of the second HDMI port are connected with the system power ground.

7. The switching circuit for high voltage insulation test of display terminal according to claim 6, wherein the USB module comprises a first USB port, a second USB port, a first USB resistor and a second USB resistor, wherein the 1 st pin of the first USB port is connected with the 1 st pin of the second USB port, the 2 nd pin of the first USB port is connected with one end of the first USB resistor, the other end of the first USB resistor is connected with the 2 nd pin of the second USB port, the 3 rd pin of the first USB port is connected with one end of the second USB resistor, the other end of the second USB resistor is connected with the 3 rd pin of the second USB port, the 4 th pin, the 5 th pin and the 6 th pin of the first USB port are connected with the system power ground, and the 4 th pin, the 5 th pin and the 6 th pin of the second USB port are connected with the system power ground.

8. A switching device, characterized in that the switching device comprises a switching circuit for a high voltage insulation test of the display terminal according to any one of claims 1 to 7.

9. The switching device according to claim 8, wherein the switching device comprises a circuit board, and the switching circuit for the high voltage insulation test of the display terminal is arranged on a component surface of the circuit board.

10. The adapter device of claim 9, further comprising an insulating sheet and a plastic backing plate, wherein the insulating sheet is attached to the plastic backing plate, and the plastic backing plate is fixed to the soldering surface of the circuit board.

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