High-resolution display circuit with DP display interface

Abstract

The utility model discloses a high-resolution display circuit with a DP display interface, a filter circuit is respectively connected with VDD, VDD1, VDD2, VDD3, VDD4 and VDD5 pins of a linear switching driver through DP voltage ports, A0RX, A1RX, A2RX and A3RX pins of the linear switching driver are all connected with coupling capacitors, a TX pin of the linear switching driver is connected with a signal repeater, and the signal repeater is connected with the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports of the DP voltage ports. And the signal repeater is connected with a display device. According to the high-resolution display device, the linear switching driver, the coupling capacitor, the filter circuit, the DP voltage port and the signal repeater are integrated, the signal transmission quality of the high-resolution display circuit is optimized, the high-resolution display device can receive stable and clear signals, the linear switching driver can improve the signal conversion efficiency, and the signal transmission quality is improved. And the signal repeater ensures the integrity of the signal in long-distance transmission, so that the overall display performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, and particularly relates to a high-resolution display circuit with a DP display interface. Background Art

[0002] In modern electronic devices, high-resolution display technology has received increasing attention, especially in devices such as laptops, monitors, and TVs. These devices usually need to support high-resolution and high-refresh-rate display functions to provide a clearer and smoother visual experience. As a high-performance digital audio-visual interface standard, DisplayPort (DP) is widely used to connect and support these high-resolution display devices.

[0003] However, the existing display circuits face some challenges when processing high-resolution signals. First, with the increase in resolution, the data transmission volume during signal transmission increases significantly, which poses higher requirements for signal stability and integrity. Second, traditional display circuit designs often fail to fully consider signal interference problems. Especially in an environment with severe electromagnetic interference (EMI), the signal quality may be affected, resulting in a decline in the display effect.

[0004] In addition, many existing designs have deficiencies in power management and cannot effectively provide a stable and efficient power supply for high-resolution displays. Unstable power will cause unstable display performance and even damage the display device. It can be seen that the existing technology still needs to be improved. Summary of the Utility Model

[0005] In view of the above deficiencies of the existing technology, the purpose of the utility model is to provide a high-resolution display circuit with a DP display interface, which is used to solve the problem that the existing technology cannot stably provide a capacitance supply for high-resolution displays.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions: A high-resolution display circuit with a DP display interface includes a linear transfer driver, a coupling capacitor, a filtering circuit, a DP voltage port, and a signal repeater. The filtering circuit is respectively connected to the VDD, VDD1, VDD2, VDD3, VDD4, and VDD5 pins of the linear transfer driver through the DP voltage port. The coupling capacitors are connected to the A0RX, A1RX, A2RX, and A3RX pins of the linear transfer driver, and the signal repeater is connected to the TX pin of the linear transfer driver. The display device is connected to the signal repeater.

[0007] In an embodiment of the present utility model, the filtering circuit includes a 186th resistor and a filtering capacitor. The power supply voltage port is connected to the DP voltage port through the 186th resistor, and the DP voltage port is grounded through the filtering capacitor.

[0008] The beneficial effects of the above embodiment are as follows: The 186th resistor and the filtering capacitor effectively reduce the noise interference at the power supply voltage port, and stabilize the power supply of the linear transfer driver through the DP voltage port, which is crucial for improving the stability of the display circuit in a complex electromagnetic environment.

[0009] In an embodiment of the present utility model, the filtering capacitor includes a 232nd capacitor, a 233rd capacitor, a 234th capacitor, a 235th capacitor, a 255th capacitor, a 257th capacitor, and a 258th capacitor connected in parallel.

[0010] The beneficial effects of the above embodiment are as follows: Connecting multiple capacitors in parallel increases the effect of the filtering circuit and improves the filtering ability for different frequency noises.

[0011] In an embodiment of the present utility model, the capacitance value of the 232nd capacitor is 4.7 uF, and the capacitance values of the 233rd capacitor, the 234th capacitor, the 235th capacitor, the 255th capacitor, the 257th capacitor, and the 258th capacitor are all 0.1 uF.

[0012] The beneficial effects of the above embodiment are as follows: The specific combination of capacitance values enables the circuit to provide effective suppression for a wide range of noise frequencies, further stabilizing the display performance.

[0013] In an embodiment of the present utility model, it further includes a 21st electrostatic discharge protector, a 23rd electrostatic discharge protector, and a 26th electrostatic discharge protector. The 21st electrostatic discharge protector is connected to the TXN2 and TXN3 pins of the linear transfer driver, the 23rd electrostatic discharge protector is connected to the TXN0 and TXN1 pins of the linear transfer driver, and the 26th electrostatic discharge protector is connected to the HPD pin of the signal repeater.

[0014] The beneficial effects of the above embodiment are as follows: The 21st electrostatic discharge protector, the 23rd electrostatic discharge protector, and the 26th electrostatic discharge protector provide necessary electrostatic protection for the display circuit. The above protectors absorb and disperse the static electricity that may damage the circuit, extending the service life and improving the reliability.

[0015] In an embodiment of the present utility model, it further includes a 31st diode. The anode of the 31st diode is connected to the power supply voltage port, and the cathode of the 31st diode is connected to the PWR pin of the signal repeater.

[0016] The beneficial effects of the above embodiments are as follows: The 31st diode protects the PWR pin of the signal repeater from reverse voltage, preventing the current on the display device from flowing back into the motherboard.

[0017] As described above, the high-resolution display circuit with a DP display interface of the present invention has the following beneficial effects: By integrating a linear transfer driver, coupling capacitors, a filtering circuit, a DP voltage port, and a signal repeater, the signal transmission quality of the high-resolution display circuit is optimized, ensuring that the high-resolution display device can receive stable and clear signals. Among them, the linear transfer driver can also improve the signal conversion efficiency, while the signal repeater guarantees the integrity of the signal during long-distance transmission, thereby improving the overall display performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0020] Figure 2 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0021] Figure 3 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0022] Figure 4 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0023] Figure 5 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0024] Figure 6 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0025] Figure 7 It is a partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present invention;

[0026] Figure 8Partial circuit diagram of the high-resolution display circuit with a DP display interface provided by the present utility model.

[0027] Description of component labels

[0028] U19 Linear conversion driver C235 Capacitor No. 235

[0029] C263 Coupling capacitor C255 Capacitor No. 255

[0030] VCC3D9 DP voltage port C257 Capacitor No. 257

[0031] DP1 Signal repeater C258 Capacitor No. 258

[0032] R186 Resistor No. 186 U21 ESD protector No. 21

[0033] C232 Capacitor No. 232 U23 ESD protector No. 23

[0034] C233 Capacitor No. 233 U26 ESD protector No. 26

[0035] C234 Capacitor No. 234 D31 Diode No. 31 Detailed implementation

[0036] The present utility model provides a high-resolution display circuit with a DP display interface. To make the purpose, technical solution and effects of the present utility model clearer and more definite, the following examples are given with reference to the attached drawings to further elaborate on the present utility model in detail.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "up and down, left and right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and should not be construed as a limitation to the present utility model; in addition, terms such as "installation" and "connection" should be understood in a broad sense, and for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Please refer to Figures 1 to 8, the present utility model provides a high-resolution display circuit with a DP display interface, including a linear transfer driver U19, a coupling capacitor C263, a filtering circuit, a DP voltage port VCCDP, and a signal repeater DP1. The filtering circuit is respectively connected to the VDD, VDD1, VDD2, VDD3, VDD4, and VDD5 pins of the linear transfer driver U19 through the DP voltage port VCCDP, and the capacitance value of the coupling capacitor C263 is 0.1uF. The coupling capacitor C263 is connected to the A0RX, A1RX, A2RX, and A3RX pins of the linear transfer driver U19, ensuring the stability of the power supply and reducing noise interference; the signal repeater DP1 is connected to the TX pin of the linear transfer driver U19, and a display device is connected to the signal repeater DP1, ensuring clear signal transmission.

[0039] Please refer to Figure 1 , in the high-resolution display circuit with a DP display interface in this embodiment, the A0TX, A1TX, A2TX, and A3TX pins of the linear transfer driver U19 are correspondingly connected to the D0, D1, D2, and D3 pins of the signal repeater DP1.

[0040] To improve the anti-interference performance and stability of the circuit, the filtering circuit includes a 186th resistor R186 and a filtering capacitor. The power supply voltage port is connected to the DP voltage port VCCDP through the 186th resistor R186, and the DP voltage port VCCDP is grounded through the filtering capacitor; the 186th resistor R186 and the filtering capacitor effectively reduce the noise interference of the power supply voltage port and stabilize the power supply of the linear transfer driver U19 through the DP voltage port VCCDP, which is crucial for improving the stability of the display circuit in a complex electromagnetic environment. Specifically, the filtering capacitor includes the 232nd capacitor C232, the 233rd capacitor C233, the 234th capacitor C234, the 235th capacitor C235, the 255th capacitor C255, the 257th capacitor C257, and the 258th capacitor C258 connected in parallel; connecting multiple capacitors in parallel increases the effect of the filtering circuit and improves the filtering ability for different frequency noises. More specifically, the capacitance value of the 232nd capacitor C232 is 4.7uF, and the capacitance values of the 233rd capacitor C233, the 234th capacitor C234, the 235th capacitor C235, the 255th capacitor C255, the 257th capacitor C257, and the 258th capacitor C258 are all 0.1uF. The specific combination of capacitance values enables the circuit to provide effective suppression for a wide range of noise frequencies and further stabilizes the display performance.

[0041] In an embodiment of the present utility model, it further includes the 21st electrostatic discharge protector U21, the 23rd electrostatic discharge protector U23, and the 26th electrostatic discharge protector U26. The 21st electrostatic discharge protector U21 is connected to the TXN2 and TXN3 pins of the linear transfer driver U19. The 23rd electrostatic discharge protector U23 is connected to the TXN0 and TXN1 pins of the linear transfer driver U19. The 26th electrostatic discharge protector U26 is connected to the HPD pin of the signal repeater DP1. The above electrostatic discharge protectors provide necessary electrostatic protection for the display circuit. The above protectors absorb and disperse the static electricity that may damage the circuit, extend the service life, and improve the reliability.

[0042] Please refer to Figure 7 , it further includes the 31st diode D31. The anode of the 31st diode D31 is connected to the power voltage port, and the cathode of the 31st diode D31 is connected to the PWR pin of the signal repeater. It can be understood that the 31st diode D31 protects the PWR pin of the signal repeater from reverse voltage and prevents the current on the display device from flowing back into the motherboard.

[0043] In summary, the high-resolution display circuit with a DP display interface of the present utility model integrates the linear transfer driver U19, the coupling capacitor C263, the filter circuit, the DP voltage port VCCDP, and the signal repeater, optimizes the signal transmission quality of the high-resolution display circuit, and ensures that the high-resolution display device can receive stable and clear signals. Among them, the linear transfer driver U19 can also improve the signal conversion efficiency, and the signal repeater ensures the integrity of the signal during long-distance transmission, thereby improving the overall display performance. Therefore, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0044] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solution and the inventive concept of the present utility model, and all such changes or substitutions should fall within the protection scope of the present utility model.

Claims

1. A high-resolution display circuit with a DP display interface, characterized in that: The invention comprises a linear redriver, a coupling capacitor, a filter circuit, a DP voltage port and a signal repeater, wherein the filter circuit is respectively connected to the VDD, VDD1, VDD2, VDD3, VDD4 and VDD5 pins of the linear redriver through the DP voltage port, the A0RX, A1RX, A2RX and A3RX pins of the linear redriver are all connected to the coupling capacitor, the TX pin of the linear redriver is connected to the signal repeater, and the signal repeater is connected to a display device.

2. The high-resolution display circuit with a DP display interface according to claim 1, characterized in that: The filter circuit includes a 186th resistor and a filter capacitor. The power supply voltage port is connected to the DP voltage port through the 186th resistor, and the DP voltage port is grounded through the filter capacitor.

3. The high-resolution display circuit with a DP display interface according to claim 2, characterized in that: The filter capacitor includes a 232nd capacitor, a 233rd capacitor, a 234th capacitor, a 235th capacitor, a 255th capacitor, a 257th capacitor and a 258th capacitor connected in parallel.

4. The high-resolution display circuit with a DP display interface according to claim 3, characterized in that: The capacitance of the 232nd capacitor is 4.7uF, and the capacitance of the 233rd capacitor, the 234th capacitor, the 235th capacitor, the 255th capacitor, the 257th capacitor and the 258th capacitor are all 0.1uF.

5. The high-resolution display circuit with a DP display interface according to claim 1, characterized in that: It also includes a 21st electrostatic discharge protector, a 23rd electrostatic discharge protector and a 26th electrostatic discharge protector. The 21st electrostatic discharge protector is connected to the TXN2 and TXN3 pins of the linear converter driver, the 23rd electrostatic discharge protector is connected to the TXN0 and TXN1 pins of the linear converter driver, and the 26th electrostatic discharge protector is connected to the HPD pin of the signal repeater.

6. The high-resolution display circuit with a DP display interface according to claim 1, characterized in that: It also includes a 31st diode, wherein the anode of the 31st diode is connected to the power supply voltage port, and the cathode of the 31st diode is connected to the PWR pin of the signal repeater.

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