Screen conversion circuit, device and system based on EDP signal

Abstract

The utility model relates to a screen conversion circuit, device and system based on an EDP signal, belongs to the field of circuits, and aims to solve the problems that the system is disordered and the display effect is poor after an existing screen rotates. The screen conversion circuit based on the EDP signal comprises a conversion circuit, a centralized processing circuit, a switching module, an SMT circuit, an anti-surge circuit, a CPU, a PCH circuit, a first capacitive reactance circuit and a filter circuit. The switching module is connected with the PCH circuit, the SMT circuit, the first capacitive reactance circuit and the conversion circuit. The centralized processing circuit, the CPU and the filter circuit are mutually connected; the conversion circuit, the switching module, the SMT circuit, the anti-surge circuit, the filter circuit and the centralized processing circuit are connected in sequence; the PCH bridge is used for obtaining a rotation transformation signal between the DP screen and the LVD screen. And when the rotation conversion signal is detected, the CPU controls the conversion circuit and the switching module to perform signal conversion so as to perform display conversion between the DP screen and the LVD screen, so that clear display is obtained after the screen is rotated, and the screen display effect is improved.

Description

Technical Field

[0001] The present application relates to the field of circuits, and more particularly, to a screen conversion circuit, device and system based on an EDP signal. Background Art

[0002] In the era of rich home electronics, the public's demand for diversified screens has increased accordingly, and thus the rotating screen has emerged. Considering safety factors, the rotating mechanism of the rotating screen uses a structure that can be rotated manually.

[0003] When the screen rotates, it is difficult to achieve adaptive rotation of the display screen and the screen, resulting in display disorders and system disorders, especially more obvious when converting between a DP screen and an LVD screen. Summary of the Utility Model

[0004] The purpose of the present application is to provide a screen conversion circuit, device and system based on an EDP signal to solve the problem of display disorders after the screen rotates.

[0005] To solve the above problems, the present application adopts the following technical solutions to be implemented:

[0006] The first aspect of the present application provides a screen conversion circuit based on an EDP signal for the rotation conversion between a DP screen and an LVD screen. The screen conversion circuit includes: a conversion circuit, a centralized processing circuit, a switching module, an SMT circuit, a surge protection circuit, a CPU, a PCH circuit, a first capacitive reactance circuit, and a filtering circuit. The switching module is respectively connected to the PCH circuit, the SMT circuit, the first capacitive reactance circuit, and the conversion circuit; the centralized processing circuit, the CPU, and the filtering circuit are connected to each other; the conversion circuit, the switching module, the SMT circuit, the surge protection circuit, the filtering circuit, and the centralized processing circuit are connected in sequence;

[0007] Wherein, the PCH circuit is used to obtain the rotation conversion signal between the DP screen and the LVD screen. When the rotation conversion signal is detected, the CPU controls the conversion circuit and the switching module to perform signal conversion to perform display conversion between the DP screen and the LVD screen.

[0008] Through the conversion circuit, the centralized processing circuit, the switching module, the SMT circuit, the surge protection circuit, the CPU, the PCH circuit, the first capacitive reactance circuit, and the filtering circuit, the rotation conversion between the DP screen and the LVD screen is realized, so that users can obtain a clear display effect when viewing the screen at different angles. The centralized processing circuit, the CPU, and the filtering circuit are connected to each other, making the signal processing more efficient and ensuring the stability and accuracy of the signal.

[0009] Further, the conversion circuit includes a conversion chip and a switch component. The conversion chip is respectively connected to the centralized processing circuit, the switch component, and the switching module. One end of the switch component is grounded, and one end of the switch component is used to receive the rotation transformation signal.

[0010] By using a conversion chip to process various different types of signals and convert them into the required format, users can select different signal sources according to their needs and achieve fast switching through the switching module, improving the flexibility and operability of the system. One end of the switch component is grounded, which can effectively improve the stability and anti-interference ability of the signal. The other end of the switch component is used to receive the rotation transformation signal, which can ensure the accurate reception and processing of the signal.

[0011] Further, the switching module includes a first switching unit, a second switching unit, and a third switching unit. The first switching unit is respectively connected to the second switching unit, the third switching unit, the SMT circuit, the PCH circuit, the conversion chip, and the switch component; the second switching unit is connected to the first capacitive reactance circuit; the third switching unit is connected to the conversion chip;

[0012] Wherein, the second switching unit is used for switching based on the DP screen display, and the third switching unit is used for switching based on the LVD screen display.

[0013] Since the first switching unit is connected to the SMT circuit, the PCH circuit, the conversion chip, and the switch component, signals can be efficiently switched and processed among these components, improving the signal transmission efficiency and processing speed. The second switching unit is used for switching based on the DP screen display, while the third switching unit is used for switching based on the LVD screen display, enabling the device to select a suitable signal source according to different display requirements, thereby improving the applicability of the device.

[0014] Further, the conversion circuit further includes a first capacitor. The first capacitor is located between the conversion chip and the centralized processing circuit and is electrically connected to the conversion chip and the centralized processing circuit respectively.

[0015] By introducing the first capacitor, the signal is filtered to effectively remove the noise and interference in the signal, thereby improving the signal quality. The capacitor can store energy and smooth the signal. The first capacitor is located between the conversion chip and the centralized processing circuit, which helps to improve the signal transmission efficiency, keep the signal stable during transmission, and reduce the attenuation and distortion of the signal.

[0016] Further, the surge protection circuit includes a first TVS tube array and two second TVS tube arrays. The first TVS tube array is located between the first capacitive reactance circuit and the SMT circuit, and the two second TVS tube arrays are both connected to the filtering circuit and the SMT circuit.

[0017] By integrating the first TVS tube array and two second TVS tube arrays, they can conduct quickly when the circuit is subjected to overvoltage impact, guiding the overvoltage to the ground to protect the subsequent circuit from damage. Introducing TVS tube arrays in the circuit can reduce the risk of failures caused by lightning strikes, power fluctuations or other electrical interferences, and reduce equipment damage and failures.

[0018] Further, the conversion circuit further includes a second capacitive reactance circuit. The second capacitive reactance circuit is located between the conversion chip and the second switching unit and is electrically connected to the conversion chip and the second switching unit respectively.

[0019] The second capacitive reactance circuit is located between the conversion chip and the second switching unit. By introducing the second capacitive reactance circuit, the signal is filtered and regulated, thereby reducing the noise and interference of the signal, improving the signal transmission efficiency, and enhancing the anti-interference ability of the system.

[0020] Further, the second capacitive reactance circuit includes a second capacitor, a first resistor and a second resistor. The first resistor and the second resistor are respectively connected to the second capacitor. The other end of the second capacitor is connected to the second switching unit. One end of the first resistor is connected to the power supply, and one end of the second resistor is grounded.

[0021] By setting the second capacitor, the first resistor and the second resistor, the signal is precisely regulated, high-frequency noise is filtered out, signal overshoot and undershoot are prevented, and the reliability of signal transmission is improved.

[0022] Further, the filtering circuit includes a plurality of third capacitors. The models of the plurality of third capacitors are all the same, and the plurality of third capacitors are connected to the CPU and the surge protection circuit in pairs.

[0023] Since the models of the plurality of third capacitors are the same and they are connected to the CPU and the surge protection circuit in pairs, it is beneficial to reduce power supply noise and ripple, improve the stability and quality of the power supply, and suppress electromagnetic interference and voltage fluctuations in the power supply line.

[0024] The present application also provides a screen conversion device based on EDP signals, including: a housing with a receiving cavity formed inside, and the screen conversion circuit based on EDP signals as described in any one of the above, which is disposed inside the housing.

[0025] The present application also provides a screen conversion system based on EDP signals. The screen rotation system includes the above-mentioned device.

[0026] Compared with the prior art, the beneficial effects of the present application are as follows: The switching module is respectively connected to the PCH circuit, the SMT circuit, the first capacitive reactance circuit and the conversion circuit. The centralized processing circuit, the CPU and the filtering circuit are interconnected. The conversion circuit, the switching module, the SMT circuit, the surge protection circuit, the filtering circuit and the centralized processing circuit are connected in sequence, realizing the rotation transformation between the DP screen and the LVD screen, enabling the user to obtain a clear display effect when viewing the screen from different angles. At the same time, the interconnection of the centralized processing circuit, the CPU and the filtering circuit makes the signal processing more efficient, ensuring the stability and accuracy of the signal. Description of the Drawings

[0027] Figure 1 It is a module diagram of a screen conversion circuit based on EDP signal provided by an embodiment of the present application;

[0028] Figure 2 It is a circuit diagram of a PCH circuit provided by an embodiment of the present application;

[0029] Figure 3 It is a circuit diagram of an SMT circuit provided by an embodiment of the present application;

[0030] Figure 4 It is a circuit diagram of a surge protection circuit provided by an embodiment of the present application;

[0031] Figure 5 It is a circuit diagram of a filtering circuit and a first capacitive reactance circuit provided by an embodiment of the present application;

[0032] Figure 6 It is a circuit diagram of a centralized processing circuit provided by an embodiment of the present application;

[0033] Figure 7 It is a circuit diagram of a conversion circuit provided by an embodiment of the present application; and

[0034] Figure 8 It is a circuit diagram of a switching module provided by an embodiment of the present application.

[0035] Description of the Reference Numerals:

[0036] 1. Conversion circuit; 11. Conversion chip; 12. Switching component; 13. Second capacitive reactance circuit; 2. Centralized processing circuit; 3. Switching module; 31. First switching unit; 32. Second switching unit; 33. Third switching unit; 4. SMT circuit; 5. Surge protection circuit; 51. First TVS tube array; 52. Second TVS tube array; 6. CPU; 7. PCH circuit; 8. First capacitive reactance circuit; 9. Filtering circuit; R10. First resistor; R20. Second resistor; C1. First capacitor; C2. Second capacitor; C3. Third capacitor. Detailed implementation manners

[0037] The following describes in detail the specific implementation manners of the present application with reference to the accompanying drawings.

[0038] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0039] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0040] Figure 1 FIG. 1 is a block diagram of a screen conversion circuit based on an EDP signal provided by an embodiment of the present application, and FIG. 2 is a circuit diagram of a PCH circuit provided by an embodiment of the present application. Figure 3 FIG. 3 is a circuit diagram of an SMT circuit provided by an embodiment of the present application. Figure 4 FIG. 4 is a circuit diagram of a surge protection circuit provided by an embodiment of the present application. Figure 5 FIG. 5 is a circuit diagram of a filter circuit and a first capacitive reactance circuit provided by an embodiment of the present application. Figure 6 FIG. 6 is a circuit diagram of a centralized processing circuit provided by an embodiment of the present application. Figure 7 FIG. 7 is a circuit diagram of a conversion circuit provided by an embodiment of the present application. Figure 8 FIG. 8 is a circuit diagram of a switching module provided by an embodiment of the present application. As Figures 1 to 8 shown, an embodiment of the present application provides a screen conversion circuit based on an EDP signal for the rotational transformation between a DP screen and an LVD screen. The screen rotation circuit includes a conversion circuit 1, a centralized processing circuit 2, a switching module 3, an SMT circuit 4, a surge protection circuit 5, a CPU 6, a PCH circuit 7, a first capacitive reactance circuit 8, and a filter circuit 9. The switching module 3 is respectively connected to the PCH circuit 7, the SMT circuit 4, the first capacitive reactance circuit 8, and the conversion circuit 1; the centralized processing circuit 2, the CPU 6, and the filter circuit 9 are connected to each other; the conversion circuit 1, the switching module 3, the SMT circuit 4, the surge protection circuit 5, the filter circuit 9, and the centralized processing circuit 2 are connected in sequence; wherein, the PCH circuit 7 is used to obtain the rotational transformation signal between the DP screen and the LVD screen. When the rotational transformation signal is detected, the CPU 6 controls the conversion circuit 1 and the switching module 3 to perform signal conversion so as to perform a display transformation between the DP screen and the LVD screen.

[0041] Specifically, the conversion circuit 1 receives and processes the DP signal, converts it into a signal suitable for the LVD screen, the centralized processing circuit 2 processes the converted signal, and performs necessary control and processing. The switching module 3 switches the signal transmission path between the DP screen and the LVD screen to achieve screen rotation. During this process, the CPU 6 controls the operation of the entire screen rotation circuit, including signal conversion and screen switching. The PCH circuit 7 obtains the rotation transformation signal between the DP screen and the LVD screen and transmits it to the CPU 6.

[0042] The first capacitive reactance circuit 8 filters the signal, the filtering circuit 9 filters the signal, and the surge protection circuit 5 protects the circuit from voltage surges to improve the stability and reliability of the circuit.

[0043] When the rotation transformation signal is detected, the CPU 6 controls the conversion circuit 1 and the switching module 3 to perform signal conversion to perform display transformation between the DP screen and the LVD screen. The converted signal is processed by the SMT circuit 4, the surge protection circuit 5, and the filtering circuit 9 to ensure stable and reliable signal transmission. The centralized processing circuit 2 further processes the converted signal to achieve screen rotation and optimize the display effect.

[0044] Through the conversion circuit 1, the centralized processing circuit 2, the switching module 3, the SMT circuit 4, the surge protection circuit 5, the CPU 6, the PCH circuit 7, the first capacitive reactance circuit 8, and the filtering circuit 9, the rotation transformation between the DP screen and the LVD screen is achieved, enabling the user to obtain a clear display effect when viewing the screen at different angles. The centralized processing circuit 2, the CPU 6, and the filtering circuit 9 are interconnected, making signal processing more efficient and ensuring signal stability and accuracy.

[0045] In some embodiments, the conversion circuit 1 includes a conversion chip 11 and a switch component 12. The conversion chip 11 is respectively connected to the centralized processing circuit 2, the switch component 12, and the switching module 3. One end of the switch component 12 is grounded, and one end of the switch component 12 is used to receive the rotation transformation signal.

[0046] Specifically, the conversion chip 11 is respectively connected to the centralized processing circuit 2, the switch component 12, and the switching module 3. The conversion chip 11 can receive instructions from the centralized processing circuit 2 and perform signal conversion according to these instructions. At the same time, one end of the switch component 12 is grounded to ensure the safety of the circuit. The other end of the switch component 12 is used to receive the rotation transformation signal.

[0047] When a rotation transformation signal is detected, the switch component 12 controls the switching of the DP signal and the LVD signal according to the change of the signal. For example, when the rotation transformation signal indicates that the screen needs to be rotated, the switch component 12 triggers the conversion chip 11 to convert the DP signal into the LVD signal, or convert the LVD signal into the DP signal, so that the screen can correctly display the image during the rotation process.

[0048] By using the conversion chip 11 to process various different types of signals and convert them into the required formats, users can select different signal sources according to their needs and achieve fast switching through the switching module 3, which improves the flexibility and operability of the system. One end of the switch component 12 is grounded, which can effectively improve the stability and anti-interference ability of the signal. The other end of the switch component 12 is used to receive the rotation transformation signal, which can ensure the accurate reception and processing of the signal.

[0049] In some embodiments, the switching module 3 includes a first switching unit 31, a second switching unit 32, and a third switching unit 33. The first switching unit 31 is respectively connected to the second switching unit 32, the third switching unit 33, the SMT circuit 4, the PCH circuit 7, the conversion chip 11, and the switch component 12; the second switching unit 32 is connected to the first capacitive reactance circuit 8; the third switching unit 33 is connected to the conversion chip 11; wherein, the second switching unit 32 is used for switching based on the DP screen display, and the third switching unit 33 is used for switching based on the LVD screen display.

[0050] Specifically, the SMT circuit 4 is a surface mount technology circuit for realizing the soldering of the circuit; the PCH circuit 7 is the main board chipset responsible for processing and transmitting various signals; the conversion chip 11 is used for signal conversion; the switch component 12 is used for controlling the on and off of each circuit. The first switching unit 31 is responsible for connecting the second switching unit 32, the third switching unit 33, the SMT circuit 4, the PCH circuit 7, the conversion chip 11, and the switch component 12. The second switching unit 32 is connected to the first capacitive reactance circuit 8. The function of the second switching unit 32 is to switch based on the DP screen display. Through the second switching unit 32, the switching of the DP screen display can be realized. The third switching unit 33 is connected to the conversion chip 11. The third switching unit 33 switches based on the LVD screen display. LVD (Low Voltage Differential Signal) is a differential signal transmission method for transmitting video signals. Through the third switching unit 33, the switching of the LVD screen display can be realized to meet different scenarios and requirements.

[0051] In practical applications, the display switching module provided in this embodiment can be applied to various electronic devices, such as computers, laptops, tablets, etc. By switching between DP and LVD screen displays, users can select the appropriate display method according to actual needs, improving the flexibility and applicability of the device.

[0052] This embodiment includes the following functions and features: The switch component 12 can switch the signal transmission paths among the SMT circuit 4, the PCH circuit 7, the conversion chip 11, and the first switching unit 31 according to user requirements or automatic judgment to achieve the coordinated operation between different circuits. The first switching unit 31 can also be connected to other relevant circuits, such as a power supply circuit, an audio circuit, etc., to achieve the switching and control of more functions.

[0053] Since the first switching unit 31 is connected to the SMT circuit 4, the PCH circuit 7, the conversion chip 11, and the switch component 12, signals can be efficiently switched and processed among these components, improving the signal transmission efficiency and processing speed. The second switching unit 32 is used for switching based on the DP screen display, while the third switching unit 33 is used for switching based on the LVD screen display, enabling the device to select the appropriate signal source according to different display requirements, thereby improving the applicability of the device.

[0054] In some embodiments, the conversion circuit 1 further includes a first capacitor C1. The first capacitor C1 is located between the conversion chip 11 and the central processing circuit 2 and is electrically connected to the conversion chip 11 and the central processing circuit 2 respectively.

[0055] Specifically, the first capacitor C1 is electrically connected to the conversion chip 11 and the central processing circuit 2 respectively. The first capacitor C1 can perform filtering and decoupling, thereby suppressing high-frequency noise in the signal, ensuring signal stability, eliminating the potential difference between the conversion chip 11 and the conversion circuit 1, and preventing signal interference.

[0056] In practical applications, the conversion circuit provided in this embodiment can be applied to various electronic devices, such as computers, laptops, tablets, etc. For example, the first capacitor C1 can adopt various capacitor types, such as ceramic capacitors, tantalum capacitors, etc., and the appropriate capacitor type is selected according to actual needs. The capacitance and voltage rating of the first capacitor C1 should be designed according to the operating voltage and frequency of the conversion chip 11 and the central processing circuit 2 to ensure the filtering and decoupling effects.

[0057] By introducing the first capacitor C1 to filter the signal, the noise and interference in the signal are effectively removed, thereby improving the signal quality. The capacitor can store energy and smooth the signal. The first capacitor C1 is located between the conversion chip 11 and the central processing circuit 2, which helps to improve the signal transmission efficiency, enables the signal to remain stable during transmission, and reduces signal attenuation and distortion.

[0058] In some embodiments, the surge protection circuit 5 includes a first TVS tube array 51 and two second TVS tube array 52. The first TVS tube array 51 is located between the first capacitive reactance circuit 8 and the SMT circuit 4, and the two second TVS tube arrays 52 are both connected to the filter circuit 9 and the SMT circuit 4.

[0059] Specifically, a TVS tube (Transient Voltage Suppressor) is a fast-response voltage protection device that can quickly conduct when the voltage exceeds its rated value, leading the overvoltage to the ground wire, thereby protecting the subsequent circuit. The first TVS tube array 51 is located between the first capacitive reactance circuit 8 and the SMT circuit 4, protecting the SMT circuit 4 from voltage surges and preventing the voltage surges introduced by the filter circuit 9 from damaging the SMT circuit 4.

[0060] The first TVS tube array 51 and the two second TVS tube arrays 52 in this embodiment can use the same type or different types of TVS tubes, and appropriate TVS tubes are selected according to actual needs. The rated voltage and surge current capacity of the TVS tubes should be designed according to the operating voltage and actual application environment of the SMT circuit 4 and the filter circuit 9 to ensure the protection effect.

[0061] By integrating the first TVS tube array 51 and the two second TVS tube arrays 52, they quickly conduct when the circuit is subjected to an overvoltage impact, leading the overvoltage to the ground and protecting the subsequent circuit from damage. Introducing TVS tube arrays in the circuit can reduce the risk of failures caused by lightning strikes, power fluctuations, or other electrical interferences, and reduce equipment damage and failures.

[0062] In some embodiments, the conversion circuit 1 further includes a second capacitive reactance circuit 13. The second capacitive reactance circuit 13 is located between the conversion chip 11 and the second switching unit 32 and is electrically connected to the conversion chip 11 and the second switching unit 32 respectively.

[0063] Specifically, the second capacitive reactance circuit 13 is electrically connected to the conversion chip 11 and the second switching unit 32 respectively. The second capacitive reactance circuit 13 can be provided with capacitors, resistors, or other capacitive reactance components. The second capacitive reactance circuit 13 can suppress high-frequency noise in the signal, ensure the stability of the signal, eliminate the potential difference between the conversion chip 11 and the second switching unit 32, and prevent the signal from being interfered.

[0064] It should be noted that the second capacitive reactance circuit 13 can use various types of capacitors, such as ceramic capacitors, tantalum capacitors, etc. The capacitance and voltage rating of the second capacitive reactance circuit 13 should be designed according to the operating voltage and frequency of the conversion chip 11 and the second switching unit 32 to ensure the filtering and decoupling effects.

[0065] The second capacitive reactance circuit 13 is located between the conversion chip 11 and the second switching unit 32. By introducing the second capacitive reactance circuit 13, the signal is filtered and adjusted, thereby reducing the noise and interference of the signal, improving the signal transmission efficiency, and enhancing the anti-interference ability of the system.

[0066] In some embodiments, the second capacitive reactance circuit 13 includes a second capacitor C2, a first resistor R10, and a second resistor R20. The first resistor R10 and the second resistor R20 are respectively connected to the second capacitor C2. The other end of the second capacitor C2 is connected to the second switching unit 32. One end of the first resistor R10 is connected to the power supply, and one end of the second resistor R20 is grounded.

[0067] Specifically, the second capacitive reactance circuit 13 includes a second capacitor C2, a first resistor R10, and a second resistor R20. The second capacitor C2 is used for filtering to suppress the high-frequency noise in the signal and ensure the stability of the signal. The first resistor R10 and the second resistor R20 are used for decoupling to eliminate the potential difference between the conversion chip 11 and the second switching unit 32 and prevent the signal from being interfered.

[0068] For example, the second capacitor C2 is a ceramic capacitor or a tantalum capacitor, and the capacitance and voltage rating of the capacitor are determined according to actual requirements. The first resistor R10 and the second resistor R20 are selected with appropriate resistor materials and sizes to ensure the stability of the resistance value. One end of the second resistor R20 is grounded, and the other end is connected to the second capacitor C2. The first resistor R10 and the second resistor R20 are respectively connected to the second capacitor C2 to form a capacitive reactance network, further optimizing the signal quality.

[0069] By setting the second capacitor C2, the first resistor R10, and the second resistor R20, the signal is precisely adjusted, the high-frequency noise is filtered out, and signal overshoot and undershoot are prevented, improving the reliability of signal transmission.

[0070] In some embodiments, the filtering circuit 9 includes a plurality of third capacitors C3. The models of the plurality of third capacitors C3 are all the same, and the plurality of third capacitors C3 are connected to the CPU 6 and the surge protection circuit 5 in pairs.

[0071] Specifically, the plurality of third capacitors C3 are connected to the corresponding pins in pairs, and the plurality of third capacitors C3 are located between the CPU 6 and the surge protection circuit 5. Both ends of each pair of third capacitors C3 are respectively connected to the CPU 6 and the surge protection circuit 5 to form a filter for suppressing the high-frequency noise and voltage fluctuations in the signal.

[0072] Since the models of the plurality of third capacitors C3 are the same and they are connected to the CPU 6 and the surge protection circuit 5 in pairs, it is beneficial to reduce the power supply noise and ripple, improve the stability and quality of the power supply, and suppress the electromagnetic interference and voltage fluctuations in the power supply line.

[0073] An embodiment of the present application further provides a screen transformation device based on an EDP signal, including: a housing internally formed with a receiving cavity, and the screen transformation circuit based on the EDP signal according to any one of the above, which is disposed in the housing.

[0074] An embodiment of the present application further provides a screen transformation system based on an EDP signal, and the screen rotation system includes the above-mentioned device.

[0075] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions required to be protected by the present application.

Claims

1. A screen conversion circuit based on EDP signal, used for rotation conversion between DP screen and LVD screen, characterized in that: The screen conversion circuit comprises: a conversion circuit, a centralized processing circuit, a switching module, an SMT circuit, a surge protection circuit, a CPU, a PCH circuit, a first capacitive reactance circuit and a filter circuit, wherein the switching module is respectively connected to the PCH circuit, the SMT circuit, the first capacitive reactance circuit and the conversion circuit; the centralized processing circuit, the CPU and the filter circuit are connected to each other; the conversion circuit, the switching module, the SMT circuit, the surge protection circuit, the filter circuit and the centralized processing circuit are connected in sequence; Among them, the PCH circuit is used to obtain the rotation transformation signal between the DP screen and the LVD screen. When the rotation transformation signal is detected, the CPU controls the conversion circuit and the switching module to perform signal conversion to perform display transformation between the DP screen and the LVD screen.

2. The screen conversion circuit based on EDP signal according to claim 1, characterized in that: The conversion circuit includes a conversion chip and a switch component. The conversion chip is respectively connected to the centralized processing circuit, the switch component and the switching module. One end of the switch component is grounded, and one end of the switch component is used to receive the rotation conversion signal.

3. The screen conversion circuit based on EDP signal according to claim 2, characterized in that: The switching module includes a first switching unit, a second switching unit and a third switching unit, wherein the first switching unit is respectively connected to the second switching unit, the third switching unit, the SMT circuit, the PCH circuit, the conversion chip and the switch component; the second switching unit is connected to the first capacitive reactance circuit; and the third switching unit is connected to the conversion chip; Among them, the second switching unit is used to switch based on the DP screen display, and the third switching unit is used to switch based on the LVD screen display.

4. The screen conversion circuit based on EDP signal according to claim 3, characterized in that: The conversion circuit further includes a first capacitor, which is located between the conversion chip and the centralized processing circuit and electrically connects the conversion chip and the centralized processing circuit respectively.

5. The screen conversion circuit based on EDP signal according to claim 4, characterized in that: The surge protection circuit includes a first TVS tube array and two second TVS tube arrays, the first TVS tube array is located between the first capacitive reactance circuit and the SMT circuit, and the two second TVS tube arrays are both connected to the filter circuit and the SMT circuit.

6. The screen conversion circuit based on EDP signal according to claim 3, characterized in that: The conversion circuit further includes a second capacitive reactance circuit, which is located between the conversion chip and the second switching unit and electrically connects the conversion chip and the second switching unit respectively.

7. The screen conversion circuit based on EDP signal according to claim 6, characterized in that: The second capacitive reactance circuit includes a second capacitor, a first resistor and a second resistor, the first resistor and the second resistor are respectively connected to the second capacitor, the other end of the second capacitor is connected to the second switching unit, one end of the first resistor is connected to the power supply, and one end of the second resistor is grounded.

8. The screen conversion circuit based on EDP signal according to claim 1, characterized in that: The filtering circuit includes a plurality of third capacitors, the models of the plurality of third capacitors are consistent, and the plurality of third capacitors are connected to the CPU and the surge protection circuit in pairs.

9. A screen changing device based on EDP signal, characterized in that: include: A shell having a receiving cavity formed therein, and a screen conversion circuit based on an EDP signal as described in any one of claims 1 to 8 are arranged in the shell.

10. A screen conversion system based on EDP signal, characterized in that: The screen changing system based on EDP signal comprises the screen changing device based on EDP signal as claimed in claim 9.

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