Screen rotating circuit, device and system

Abstract

The utility model relates to a screen rotation circuit, device and system, belongs to the field of circuits, and aims to solve the problems of disorder system and poor display effect after rotation of an existing screen. The screen rotating circuit is used for conversion between a DP screen and an LVDS screen, the screen rotating circuit comprises a CPU, an SMT module, a PCH bridge, a capacitive reactance circuit, an anti-surge circuit and a filter circuit, and the SMT module is connected with the PCH bridge, the anti-surge circuit and the capacitive reactance circuit; the capacitive reactance circuit, the CPU, the filter circuit and the anti-surge circuit are connected in sequence, the PCH bridge is used for obtaining an LVDS screen access signal, when it is detected that the LVDS screen is accessed, the CPU carries out signal conversion so that a signal transmitted to a DP screen can be converted to the LVDS screen, and the LVDSLVDS enables equipment to be flexibly switched among different types of screens, so that a system is stable and reliable after the screens are rotated, and the service life of the system is prolonged. The screen display effect is improved.

Description

Technical Field

[0001] The present application relates to the field of circuits, and in particular, to a screen rotation circuit, device and system. Background Art

[0002] In the era of abundant home electronics, the public's demand for diversified screens has increased, and thus the rotating screen was born. The rotating mechanism of the rotating screen uses a structure that can be rotated manually while considering safety factors. For example, when the computer screen is rotated, the control center cannot determine the position of the screen at this time, especially when the offset angle is too large and enters the screen position in another direction, it is easy to destroy the steady state between the system and the structure, causing system disorder, especially when the DP screen and the LVDS screen are switched. Utility Model Content

[0003] The purpose of the present application is to provide a screen rotation circuit, device and system to solve the problem of system disorder after screen rotation.

[0004] In order to solve the above problems, the present application adopts the following technical solutions:

[0005] The first aspect of the present application provides a screen rotation circuit for converting a DP screen to an LVDS screen, the screen rotation circuit comprising: a CPU, an SMT module, a PCH bridge, a capacitive reactance circuit, an anti-surge circuit and a filter circuit, the SMT module being connected to the PCH bridge, the anti-surge circuit and the capacitive reactance circuit respectively; the capacitive reactance circuit, the CPU, the filter circuit and the anti-surge circuit being connected in sequence,

[0006] The PCH bridge is used to obtain the LVDS screen access signal. When the LVDS screen access is detected, the CPU performs signal conversion so that the signal transmitted to the DP screen is converted to the LVDS screen.

[0007] The CPU performs signal conversion. When an LVDS screen is detected, the signal transmitted to the DP screen is converted to the LVDS screen, so that the device can flexibly switch between different types of screens, thereby increasing the scope of application of the device. By sequentially connecting the SMT module, the capacitive reactance circuit, the surge protection circuit, and the filter circuit, signal interference is effectively reduced, the stability of signal transmission is improved, and the clarity of the screen display effect is ensured. The introduction of the capacitive reactance circuit and the surge protection circuit can effectively prevent voltage fluctuations and surges from damaging components such as the CPU and PCH bridge, thereby increasing the service life and safety of the device.

[0008] Further, the capacitive reactance circuit includes a first capacitor and a second capacitor. Both the first capacitor and the second capacitor are connected to the CPU. The other end of the first capacitor is connected to the SMT module, and the other end of the second capacitor is grounded. By connecting the first capacitor and the second capacitor, the input signal is filtered, effectively suppressing high-frequency noise and interference and ensuring the purity of the signal.

[0009] Further, the capacitive reactance circuit further includes a Schottky diode, which is connected to the first capacitor. By adding a Schottky diode to the capacitive reactance circuit, the equivalent series resistance of the circuit can be effectively reduced, thereby improving the response speed of the circuit and enhancing the stability of the circuit.

[0010] Further, the screen rotation circuit further includes a field effect transistor, which is respectively connected to the PCH bridge and the SMT module.

[0011] The field effect transistor realizes the switching of the switching function through voltage control. By using a field effect transistor in the screen rotation circuit, precise control of the PCH bridge and the SMT module can be achieved.

[0012] Further, the screen rotation circuit further includes an impedance sub-circuit, which is located between the field effect transistor and the SMT module and is respectively connected to the field effect transistor and the SMT module.

[0013] By adding an impedance sub-circuit, the voltage fluctuation between the field effect transistor and the SMT module can be effectively reduced, the interference of the circuit can be reduced. At the same time, the current can be effectively regulated, so that the field effect transistor and the SMT module work at a lower voltage, thereby reducing the power consumption of the circuit.

[0014] Further, the impedance sub-circuit includes a first resistor and a second resistor. The two ends of the first resistor are respectively connected to the field effect transistor and the SMT module. One end of the second resistor is grounded, and the other end of the second resistor is connected to the SMT module.

[0015] By adding the first resistor and the second resistor to the screen rotation circuit, the first resistor is connected between the field effect transistor and the SMT module, which helps to balance the voltage difference between the two, maintain voltage stability, improve the signal quality of the circuit, and ensure the accuracy of the screen rotation control 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 capacitive reactance circuit and the SMT module, and the two second TVS tube arrays are both connected to the filtering circuit and the SMT module.

[0017] Adding a TVS tube array to the circuit can greatly reduce the failure risk caused by voltage surges. The first TVS tube array is located between the capacitive reactance circuit and the SMT module, and the second TVS tube array is connected to the filter circuit and the SMT module, which can effectively absorb and disperse the surge voltage and protect the SMT module from damage.

[0018] Further, the first TVS tube array is respectively connected to the field effect transistor, the SMT module and the capacitive reactance circuit.

[0019] By designing the first TVS tube array in the surge protection circuit and connecting the array to the field effect transistor, the SMT module and the capacitive reactance circuit respectively, the surge voltage from the power supply side or the voltage anomaly inside the circuit can be effectively absorbed and dispersed, reducing the risk of circuit damage and effectively improving the stability and reliability of the circuit.

[0020] The present application also provides a screen rotation device, including: a housing with a receiving cavity formed therein, and the screen rotation circuit according to any one of the above, disposed inside the housing.

[0021] The present application also provides a screen rotation system, and the screen rotation system includes the above device.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: when it is detected that the LVDS screen is connected, the signal transmitted to the DP screen is converted to the LVDS screen, and the CPU performs signal conversion, so that the device can flexibly switch between different types of screens and improve the applicable range of the device. By connecting the SMT module, the capacitive reactance circuit, the surge protection circuit and the filter circuit in sequence, the signal interference is effectively reduced and the stability of signal transmission is improved. Description of the Drawings

[0023] Figure 1 It is a circuit diagram of a screen rotation circuit provided by an embodiment of the present application;

[0024] Figure 2 It is a module schematic diagram of a screen rotation circuit provided by an embodiment of the present application;

[0025] Figure 3 It is a circuit diagram of a CPU provided by an embodiment of the present application;

[0026] Figure 4 It is a circuit diagram of a surge protection circuit provided by an embodiment of the present application; and

[0027] Figure 5 It is a circuit schematic diagram of a capacitive reactance circuit and a filter circuit provided by an embodiment of the present application.

[0028] Description of the Reference Numerals:

[0029] 1. CPU; 2. SMT module; 3. PCH bridge; 4. Capacitive reactance circuit; 41. Schottky diode; 5. Surge protection circuit; 51. First TVS diode array; 52. Second TVS diode array; 6. Filtering circuit; 7. Field effect transistor; 8. Impedance sub-circuit; R10. First resistor; R20. Second resistor; C1. First capacitor; C2. Second capacitor. Detailed implementation manners

[0030] The following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings.

[0031] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments may be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory illustration of the gist of the present application and should not be regarded as an improper limitation to the present application.

[0032] 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.

[0033] Figure 1 A circuit diagram of a screen rotation circuit provided by an embodiment of the present application; Figure 2 A module schematic diagram of a screen rotation circuit provided by an embodiment of the present application; Figure 3 A circuit diagram of a CPU provided by an embodiment of the present application; Figure 4 A circuit diagram of a surge protection circuit provided by an embodiment of the present application; Figure 5 A circuit schematic diagram of a capacitive reactance circuit and a filtering circuit provided by an embodiment of the present application. As Figures 1 to 5 shown, an embodiment of the present application provides a screen rotation circuit for DP screen and LVDS screen conversion. The screen rotation circuit includes a CPU 1, an SMT module 2, a PCH bridge 3, a capacitive reactance circuit 4, a surge protection circuit 5, and a filtering circuit 6. The SMT module 2 is respectively connected to the PCH bridge 3, the surge protection circuit 5, and the capacitive reactance circuit 4. The capacitive reactance circuit 4, the CPU 1, the filtering circuit 6, and the surge protection circuit 5 are connected in sequence. The PCH bridge 3 is used to obtain the LVDS screen access signal. When it detects the access of the LVDS screen, the CPU 1 performs signal conversion so that the signal transmitted to the DP screen is converted to the LVDS screen.

[0034] Specifically, the screen rotation circuit for DP screen and LVDS screen conversion includes a CPU 1, an SMT module 2, a PCH bridge 3, a capacitive reactance circuit 4, a surge protection circuit 5, and a filtering circuit 6. The SMT module 2 is respectively connected to the PCH bridge 3, the surge protection circuit 5, and the capacitive reactance circuit 4. The capacitive reactance circuit 4, the CPU 1, the filtering circuit 6, and the surge protection circuit 5 are connected in sequence to form a complete signal processing link.

[0035] The PCH bridge 3 is responsible for detecting the access signal of the LVDS screen. When the LVDS screen is detected to be accessed, it notifies the CPU 1 to perform signal conversion. After receiving the signal conversion instruction, the CPU 1 adjusts and converts the signal transmitted to the DP screen according to the characteristics of the LVDS screen. The converted signal passes through the filtering circuit 6 and the surge protection circuit 5 to ensure signal quality and protect the circuit from power surges. The signal after conversion and processing is finally transmitted to the LVDS screen to achieve the switching of the screen interface.

[0036] It should be understood that the screen rotation circuit realizes DP screen rotation based on the EDP signal, which involves the interface between the display portal (DP) and the display device. Among them, DP (DisplayPort) is a display interface standard used to connect display devices such as computers and monitors. The DP signal contains video and audio data, as well as some other control information. The DP (Display Port) screen rotation function needs to process the EDP (Embedded Display Port) signal, which is a display interface standard designed specifically for laptops and other portable devices. The EDP signal is directly embedded in the connection between the video source (such as the GPU) and the monitor, without the need for additional converters or adapters. In this circuit design, the PCH bridge is responsible for processing the EDP signal from the GPU or other video sources and routing it correctly to the rotated monitor. It involves complex electronic operations such as signal conversion, format conversion, and timing adjustment to ensure normal display effects after screen rotation. SMT (Surface Mount Technology) is an electronic assembly technology used to directly mount pinless or short-pin electronic components onto the surface of a printed circuit board (PCB). The PCH bridge refers to the PCIe Host Controller Hub, which is a chip or integrated circuit on the computer motherboard. DP screen rotation involves a screen display signal switching mechanism based on CPU1, PCH bridge 3, and SMT module 2 on the motherboard, which allows the system to switch between two display output interfaces, namely EDP (Embedded Display Port) and LVDS (Low Voltage Differential Signaling). In the absence of any external device access, the EDP signal on the motherboard will be directly output to the DP (Display Port) interface. When an external LVDS display is connected, usually the LVDS display device will provide a high-level signal to the switching circuit on the motherboard through its sixth pin (assumed to be GND or a dedicated switching signal pin). Detect the sixth-pin signal provided by the LVDS display. When this pin changes from high level to low level, the circuit will output a signal to the PCH bridge 3. After CPU1 obtains the signal from the PCH bridge 3, it starts the internal conversion logic to route the original EDP signal output to the DP interface to the LVDS interface.

[0037] The signal conversion is performed by the CPU 1. When the LVDS screen is detected to be connected, the signal transmitted to the DP screen is converted to the LVDS screen, enabling the device to flexibly switch between different types of screens and improving the applicable range of the device. By sequentially connecting the SMT module, the capacitive reactance circuit, the surge protection circuit, and the filtering circuit, the signal interference is effectively reduced, the stability of signal transmission is improved, and the clarity of the screen display effect is ensured. The introduction of the capacitive reactance circuit and the surge protection circuit can effectively prevent the damage to components such as the CPU 1 and the PCH bridge caused by voltage fluctuations and surges, and improve the service life and safety of the device.

[0038] In some embodiments, the capacitive reactance circuit 4 includes a first capacitor C1 and a second capacitor C2. Both the first capacitor C1 and the second capacitor C2 are connected to the CPU 1. The other end of the first capacitor C1 is connected to the SMT module 2, and the other end of the second capacitor C2 is grounded.

[0039] Specifically, both the first capacitor C1 and the second capacitor C2 of the capacitive reactance circuit 4 are connected to the CPU 1, enabling the CPU 1 to control and monitor the state of the capacitors for appropriate signal processing. The other end of the first capacitor C1 is connected to the SMT module 2. The SMT module 2 is part of the surface mount technology, which connects the capacitor C1 to other parts of the circuit to ensure stable signal transmission. The other end of the second capacitor C2 is grounded, which can provide a stable reference potential and contribute to improving the stability and performance of the circuit. In practical applications, the first capacitor C1 and the second capacitor C2 should be selected according to specific circuit requirements and characteristics. For example, parameters such as the capacitance value, capacitive reactance, and frequency response of the capacitor should be selected according to the circuit design requirements. The capacitive reactance circuit 4 can use different types of capacitors, such as ceramic capacitors, polyester capacitors, etc., to meet different circuit requirements. To further improve the performance of the circuit, the capacitive reactance circuit 4 can also include other components, such as resistors, to form a better signal processing circuit.

[0040] By connecting the first capacitor C1 and the second capacitor C2, the input signal is filtered, effectively suppressing high-frequency noise and interference and ensuring the purity of the signal.

[0041] In some embodiments, the capacitive reactance circuit 4 further includes a Schottky diode 41, and the Schottky diode 41 is connected to the first capacitor C1.

[0042] Specifically, the Schottky diode 41 of the capacitive reactance circuit 4 is connected to the first capacitor C1 to further improve the performance of the circuit. The Schottky diode 41 should be selected according to specific circuit requirements and characteristics. For example, parameters such as the forward voltage, reverse leakage current, and breakdown voltage of the Schottky diode should be selected according to the circuit design requirements. The Schottky diode 41 provides fast switching characteristics in the circuit to reduce signal transmission loss and delay.

[0043] By adding a Schottky diode 41 to the capacitive reactance circuit 4, the equivalent series resistance of the circuit can be effectively reduced, thereby improving the response speed of the circuit and enhancing the stability of the circuit.

[0044] In some embodiments, the screen rotation circuit further includes a field effect transistor 7, and the field effect transistor 7 is respectively connected to the PCH bridge 3 and the SMT module 2.

[0045] Specifically, the field effect transistor 7 can act as a switch and control the signal flow according to the instruction control signal of the CPU 1. The field effect transistor 7 is respectively connected to the PCH bridge 3 and the SMT module 2. When the CPU 1 needs to transmit a signal from the PCH bridge 3 to the SMT module 2, it controls the field effect transistor 7 to conduct, enabling the signal to pass through. When the CPU 1 needs to transmit a signal from the SMT module 2 to the PCH bridge 3, it controls the field effect transistor 7 to cut off, enabling the signal to pass through. The selection of the field effect transistor 7 should be based on specific circuit requirements and characteristics. For example, parameters such as the gate oxide layer thickness, leakage current, and switching speed of the field effect transistor should be selected according to the design requirements of the circuit.

[0046] The field effect transistor 7 realizes the switching of the switching function through voltage control. By using a field effect transistor in the screen rotation circuit, precise control of the PCH bridge 3 and the SMT module 2 can be achieved.

[0047] In some embodiments, the screen rotation circuit further includes an impedance sub-circuit 8. The impedance sub-circuit 8 is located between the field effect transistor 7 and the SMT module 2 and is respectively connected to the field effect transistor 7 and the SMT module 2.

[0048] Specifically, the impedance sub-circuit 8 provides appropriate impedance matching between the field effect transistor 7 and the SMT module 2 to reduce signal reflection and loss and improve the signal transmission efficiency. The impedance sub-circuit 8 can include components such as resistors and inductors to form an impedance matching network, thereby adjusting the impedance characteristics of the circuit to match the impedance of the adjacent circuit.

[0049] By adding the impedance sub-circuit 8, the voltage fluctuation between the field effect transistor 7 and the SMT module 2 can be effectively reduced, the interference of the circuit can be minimized, and at the same time, the current can be effectively regulated, enabling the field effect transistor 7 and the SMT module 2 to operate at a lower voltage, thereby reducing the power consumption of the circuit.

[0050] In some embodiments, the impedance sub-circuit 8 includes a first resistor R10 and a second resistor R20. Both ends of the first resistor R10 are respectively connected to the field effect transistor 7 and the SMT module 2. One end of the second resistor R20 is grounded, and the other end of the second resistor R20 is connected to the SMT module 2.

[0051] Specifically, both ends of the first resistor R10 of the impedance sub-circuit 8 are respectively connected to the field effect transistor 7 and the SMT module 2, playing a role in providing appropriate impedance matching. At the same time, one end of the second resistor R20 is grounded, and the other end is connected to the SMT module 22, thereby providing a stable reference potential and helping to reduce signal interference and noise. The impedance sub-circuit 8 takes into account factors such as the frequency characteristics of the circuit, impedance matching requirements, and signal transmission distance to ensure the performance and reliability of the circuit.

[0052] By adding the first resistor R10 and the second resistor R20 to the screen rotation circuit, the first resistor R10 is connected between the field effect transistor 7 and the SMT module 2, which helps to balance the voltage difference between the two, maintain voltage stability, improve the signal quality of the circuit, and ensure the accuracy of the screen rotation control signal.

[0053] In some embodiments, the surge protection circuit 5 includes a first TVS tube array 51 and two second TVS tube arrays 52. The first TVS tube array 51 is located between the capacitive reactance circuit 4 and the SMT module 2, and the two second TVS tube arrays 52 are both connected to the filter circuit 6 and the SMT module 2.

[0054] Specifically, the first TVS tube array 51 is located between the capacitive reactance circuit 4 and the SMT module 2, playing a role in protecting the circuit and preventing circuit damage caused by voltage surges. The two second TVS tube arrays 52 are both connected to the filter circuit 6 and the SMT module 2 to protect the circuit and prevent circuit damage caused by voltage surges. It should be noted that the TVS tube is a bidirectional voltage suppression diode that can provide a fast protection response in the circuit to suppress voltage surges and transient voltages.

[0055] Adding a TVS tube array to the circuit can greatly reduce the risk of failures caused by voltage surges. The first TVS tube array 51 is located between the capacitive reactance circuit 4 and the SMT module 2, and the second TVS tube array 52 is connected to the filter circuit 6 and the SMT module 2, which can effectively absorb and disperse the surge voltage and protect the SMT module 2 from damage.

[0056] In some embodiments, the first TVS tube array 51 is respectively connected to the field effect transistor 7, the SMT module 2, and the capacitive reactance circuit 4.

[0057] Specifically, the screen rotation circuit includes a CPU 1, an SMT module 2, a PCH bridge 3, a capacitive reactance circuit 4, a surge protection circuit 5, a filtering circuit 6, a field effect transistor 7, and a first TVS tube array 51. The first TVS tube array 51 is connected to the field effect transistor 7, the SMT module 2, and the capacitive reactance circuit 4 respectively, ensuring that the TVS tubes can respond quickly and provide protection when a voltage surge occurs. In practical applications, the first TVS tube array 51 should be selected according to specific circuit requirements and characteristics. For example, parameters such as the breakdown voltage, maximum continuous voltage, clamping voltage, and clamping current of the TVS tubes should be selected according to the design requirements of the circuit.

[0058] By designing the first TVS tube array 51 in the surge protection circuit 5 and connecting this array to the field effect transistor 7, the SMT module 2, and the capacitive reactance circuit 4 respectively, the surge voltage from the power supply side or the voltage anomaly inside the circuit can be effectively absorbed and dispersed, reducing the risk of circuit damage and effectively improving the stability and reliability of the circuit.

[0059] The embodiment of the present application also provides a screen rotation device, which is characterized by including: a housing with a receiving cavity formed inside, and the screen rotation circuit of any one of the above, which is arranged inside the housing.

[0060] The embodiment of the present application also provides a screen rotation system, and the screen rotation system includes the above screen rotation device.

[0061] 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, for those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present application.

Claims

1. A screen rotation circuit for converting between a DP screen and a LVDS screen, characterized in that: The screen rotation circuit includes: a CPU, an SMT module, a PCH bridge, a capacitive reactance circuit, an anti-surge circuit and a filter circuit. The SMT module is connected to the PCH bridge, the anti-surge circuit and the capacitive reactance circuit respectively; the capacitive reactance circuit, the CPU, the filter circuit and the anti-surge circuit are connected in sequence. The PCH bridge is used to obtain the LVDS screen access signal. When the LVDS screen access is detected, the CPU performs signal conversion so that the signal transmitted to the DP screen is converted to the LVDS screen.

2. A screen rotation circuit according to claim 1, characterized in that: The capacitive reactance circuit includes a first capacitor and a second capacitor, the first capacitor and the second capacitor are both connected to the CPU, the other end of the first capacitor is connected to the SMT module, and the other end of the second capacitor is grounded.

3. A screen rotation circuit according to claim 2, characterized in that: The capacitive reactance circuit further includes a Schottky diode, and the Schottky diode is connected to the first capacitor.

4. A screen rotation circuit according to claim 1, characterized in that: The screen rotation circuit also includes a field effect transistor, and the field effect transistor is respectively connected to the PCH bridge and the SMT module.

5. A screen rotation circuit according to claim 4, characterized in that: The screen rotation circuit also includes an impedance subcircuit, which is located between the field effect tube and the SMT module and is connected to the field effect tube and the SMT module respectively.

6. A screen rotation circuit according to claim 5, characterized in that: The impedance subcircuit includes a first resistor and a second resistor, wherein two ends of the first resistor are respectively connected to the field effect transistor and the SMT module, one end of the second resistor is grounded, and the other end of the second resistor is connected to the SMT module.

7. A screen rotation circuit 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 capacitive reactance circuit and the SMT module, and the two second TVS tube arrays are both connected to the filter circuit and the SMT module.

8. A screen rotation circuit according to claim 7, characterized in that: The first TVS tube array is connected to the field effect tube, the SMT module and the capacitive reactance circuit respectively.

9. A screen rotating device, characterized in that: include: A shell having a receiving cavity formed therein, and the screen rotation circuit according to any one of claims 1 to 8 are arranged in the shell.

10. A screen rotation system, characterized in that: The screen rotation system comprises the device according to claim 9.

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