Electromagnetic resistant anti-interference circuit and method thereof and vehicle display device

Abstract

The application discloses an electromagnetic-resistant anti-interference circuit, a method thereof and a display device for vehicle. The electromagnetic-resistant anti-interference circuit comprises a dipole antenna, a detection circuit, a differential amplification circuit and a judgment circuit. The dipole antenna is arranged around the effective display area of the display panel. The detection circuit is electrically connected to the feeding point of the dipole antenna. During the normal display period of the display panel, the detection circuit receives a first voltage from the display panel, so that the dipole antenna is grounded, and the differential amplification circuit and the judgment circuit are disabled. During the scan line disable period of the display panel, the detection circuit receives a second voltage different from the first voltage from the display panel, so that the dipole antenna performs electromagnetic-resistant induction on the interference source, and the differential amplification circuit generates an output voltage according to the induced voltage received from the detection circuit. The judgment circuit judges whether to start the anti-interference mechanism according to the output voltage.

Description

Technical Field

[0001] This invention relates to an electromagnetic susceptibility anti-interference circuit, and more particularly to an electromagnetic susceptibility anti-interference circuit and method thereof, and an automotive display device. Background Technology

[0002] To ensure the safety of passengers and road users, electromagnetic compatibility (EMC) testing is conducted on automotive panels. EMC includes electromagnetic interference (EMI) and electromagnetic susceptibility (EMS). Generally, adding conductive tape or absorbing materials to specific locations on the product under test (e.g., areas prone to electromagnetic radiation or interference) can effectively suppress EMI from the internal LCD module and reduce EMC issues from external interference sources; however, this increases manufacturing time and cost. On the other hand, improving the signal receiving capability of the product under test, such as increasing the receiving current, can enhance EMS immunity, but it also increases EMI interference. This results in a trade-off between EMS and EMI mitigation strategies. Summary of the Invention

[0003] At least one embodiment of the present invention provides an electromagnetic susceptibility anti-interference circuit suitable for display panels. The electromagnetic susceptibility anti-interference circuit includes a dipole antenna, a detection circuit, a differential amplifier circuit, and a judgment circuit. The dipole antenna is arranged around the effective display area of ​​the display panel. The detection circuit is electrically connected to the feed point of the dipole antenna. The differential amplifier circuit is electrically connected to the detection circuit. The judgment circuit is electrically connected to the differential amplifier circuit. During normal display of the display panel, the detection circuit receives a first voltage from the display panel, grounding the dipole antenna and disabling the differential amplifier circuit and the judgment circuit. During the scan line disabling period of the display panel, the detection circuit receives a second voltage from the display panel with a voltage level different from the first voltage, causing the dipole antenna to perform electromagnetic susceptibility induction against interference sources, and causing the differential amplifier circuit to generate an output voltage corresponding to the induced voltage received from the detection circuit. The judgment circuit determines whether to activate the anti-interference mechanism based on the output voltage.

[0004] In at least one embodiment of the present invention, the dipole antenna is an indium tin oxide (ITO) antenna.

[0005] In at least one embodiment of the present invention, the dipole antenna is floating during the scan line disable period of the display panel.

[0006] In at least one embodiment of the present invention, the dipole antenna is a half-wavelength dipole antenna or a quarter-wavelength dipole antenna, and the feed point divides the dipole antenna into a first conductive element and a second conductive element.

[0007] In at least one embodiment of the present invention, the detection circuit includes a first transistor, a second transistor, a third transistor, and an inverter. The control terminal of the first transistor is used to receive a first voltage or a second voltage from the display panel, and a first terminal of the first transistor is coupled to one end of a first conductive element. The control terminal of the second transistor is used to receive the first voltage or the second voltage from the display panel, and a first terminal of the second transistor is coupled to one end of a second conductive element. The first terminal of the third transistor is coupled to a differential amplifier circuit, and a second terminal of the third transistor is coupled to the other end of the first conductive element, the other end of which is coupled to an RF ground terminal. One end of the inverter is used to receive the first voltage or the second voltage from the display panel, and the other end of the inverter is coupled to the control terminal of the third transistor.

[0008] In at least one embodiment of the present invention, during normal display of the display panel, the first transistor and the second transistor are turned on and the third transistor is turned off. During the scan line disabling period of the display panel, the dipole antenna is floating, and the first transistor and the second transistor are turned off and the third transistor is turned on.

[0009] In at least one embodiment of the present invention, during the scan line disabling period of the display panel, the differential amplifier circuit is used to perform half-wave rectification on the induced voltage and then amplify the voltage to generate an output voltage accordingly.

[0010] In at least one embodiment of the present invention, during the scan line disabling period of the display panel, the determination circuit is used to compare the output voltage with a voltage threshold. When the comparison result of N consecutive frames is that the output voltage exceeds the voltage threshold, the anti-interference mechanism is activated, where N is a positive integer.

[0011] In at least one embodiment of the present invention, the above-mentioned anti-interference mechanism is to increase the input current of the low-voltage differential signaling (LVDS) receiver of the display panel.

[0012] At least one embodiment of the present invention further provides an automotive display device, comprising the electromagnetic immunity and anti-interference circuit as described above.

[0013] At least one embodiment of the present invention also provides an electromagnetic susceptibility anti-interference method applicable to a display panel. The electromagnetic susceptibility anti-interference method includes: determining whether the display panel is in a scan line disabled period; when it is determined that the display panel is not in a scan line disabled period, the display panel performs a normal driving process, and the dipole antennas arranged around the effective display area of ​​the display panel are grounded; and when it is determined that the display panel is in a scan line disabled period, the dipole antennas perform electromagnetic susceptibility induction with respect to the interference source, thereby generating an induced voltage, then rectifying and differentially amplifying the induced voltage to generate a corresponding output voltage, and determining whether to activate the anti-interference mechanism based on the output voltage.

[0014] In at least one embodiment of the present invention, determining whether to activate the anti-interference mechanism based on the output voltage includes: comparing the output voltage with a voltage threshold; and activating the anti-interference mechanism when the comparison results of N consecutive frames are all that the output voltage exceeds the voltage threshold, where N is a positive integer.

[0015] In at least one embodiment of the present invention, the above-mentioned anti-interference mechanism is to increase the input current of the LVDS receiver of the display panel.

[0016] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] A better understanding of the invention can be obtained from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that, according to industry standard practice, the features are not drawn to scale. In fact, the dimensions of the features can be arbitrarily increased or decreased for clarity of discussion.

[0018] Figure 1 This is a schematic diagram of an electromagnetic tolerance anti-interference circuit according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of an electromagnetic tolerance anti-interference circuit according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the circuit state during normal display according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the circuit state during the scan line disable period according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of a differential amplifier circuit according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the layout of a dipole antenna 100 according to an embodiment of the present invention.

[0024] Figure 7 This is a flowchart of an electromagnetic tolerance anti-interference method according to an embodiment of the present invention.

[0025] Figure 8 This is a detailed flowchart of an electromagnetic tolerance and anti-interference method according to an embodiment of the present invention.

[0026] Figure 9 This is an example of a vehicle display device according to an embodiment of the present invention.

[0027] In the attached figures, the following labels are used:

[0028] 10-Electromagnetic tolerance and anti-interference circuit;

[0029] 20 - Vehicle display devices;

[0030] 21-Base;

[0031] 22, DP - Display Panel;

[0032] 100-Dipole Antenna;

[0033] 110, 120 - Conductive elements;

[0034] 200 - Detection circuit;

[0035] 300-Differential Amplifier Circuit;

[0036] 400 - Judgment Circuit;

[0037] 900 - Vehicles;

[0038] Cf - capacitor;

[0039] D1 - Inverter;

[0040] D2 - Diode;

[0041] DR - Driving Area;

[0042] FD - Feed point;

[0043] FPC - Flexible Printed Circuit Board;

[0044] GND - Ground terminal;

[0045] IC - Display panel driver IC;

[0046] OFF - Turn off;

[0047] ON - Conductive;

[0048] OP - Operational amplifier;

[0049] Q1, Q2, Q3 - Transistors;

[0050] R0~R4 - Resistors;

[0051] RF_GND - Radio frequency ground terminal;

[0052] S1~S3, T1~T6 - Steps;

[0053] V1, V2, VGH, VGL - Voltage;

[0054] V+-System voltage;

[0055] Vout - Output voltage;

[0056] Vs - Induced voltage. Detailed Implementation

[0057] The embodiments of the present invention will be discussed in detail below. However, it will be understood that the embodiments provide many applicable concepts that can be implemented in a wide variety of specific contexts. The discussed and disclosed embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. The terms "first," "second," etc., used herein do not specifically refer to order or sequence, but are merely used to distinguish elements or operations described using the same technical terms.

[0058] Figure 1 and Figure 2 This is a schematic diagram of an electromagnetic susceptibility anti-interference circuit 10 according to an embodiment of the present invention. The electromagnetic susceptibility anti-interference circuit 10 includes a dipole antenna 100, a detection circuit 200, a differential amplifier circuit 300, and a judgment circuit 400. The detection circuit 200 is electrically connected to the feed point FD of the dipole antenna 100, the differential amplifier circuit 300 is electrically connected to the detection circuit 200, and the judgment circuit 400 is electrically connected to the differential amplifier circuit 300. In other words, the detection circuit 200 is electrically connected between the feed point FD of the dipole antenna 100 and the differential amplifier circuit 300, and the differential amplifier circuit 300 is electrically connected between the detection circuit 200 and the judgment circuit 400.

[0059] In an embodiment of the present invention, the dipole antenna 100 is an indium tin oxide (ITO) antenna, and the feed point FD equally divides the dipole antenna 100 into conductive elements 110 and 120.

[0060] like Figure 1 and Figure 2As shown, the detection circuit 200 includes an inverter D1 and transistors Q1, Q2, and Q3. The first terminal of transistor Q1 is coupled to one end of conductive element 110, the second terminal of transistor Q3 is coupled to the other end of conductive element 110, the first terminal of transistor Q2 is coupled to one end of conductive element 120, and the other end of conductive element 120 is coupled to the radio frequency ground terminal RF_GND. The second terminals of transistors Q1 and Q2 are coupled to the ground terminal GND. The first terminal of transistor Q3 is coupled to the differential amplifier circuit 300. The control terminals of transistors Q1 and Q2 are coupled to one end of inverter D1. The other end of inverter D1 is coupled to the control terminal of transistor Q3.

[0061] Figure 3 This is a schematic diagram of the circuit state during normal display according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3 As shown, during normal display of the display panel, the control terminals of transistors Q1 and Q2 in the detection circuit 200, and one end of inverter D1, respectively receive voltage VGH from the display panel. Accordingly, transistors Q1 and Q2 are ON, grounding the dipole antenna 100 (coupled to ground terminal GND). Additionally, transistor Q3 is OFF, disabling the differential amplifier circuit 300 and the judgment circuit 400. It is worth noting that... Figure 3 The voltage VGH (high voltage level) shown is merely illustrative and depends on whether transistors Q1-Q3 are N-type or P-type transistors. In other words, in other embodiments of the invention, Figure 3 The voltage VGH shown can also be replaced with voltage VGL (low voltage level).

[0062] Figure 4 This is a schematic diagram of the circuit state during the scan line disable period according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 4 As shown, during the scan line disabling period of the display panel, the control terminals of transistors Q1 and Q2 in the detection circuit 200, and one end of inverter D1, respectively receive voltages VGL with voltage levels different from voltage VGH from the display panel. Accordingly, transistors Q1 and Q2 are turned off, causing the dipole antenna 100 to float, enabling it to perform electromagnetic susceptibility sensing against interference sources. Additionally, transistor Q3 is turned on, causing the differential amplifier circuit 300 to generate an output voltage Vout correspondingly based on the induced voltage Vs received from the detection circuit 200. It is worth noting that... Figure 4 The second voltage VGL shown is merely illustrative and depends on whether transistors Q1-Q3 are N-type or P-type transistors; in other words, in other embodiments of the invention, Figure 4The voltage VGL shown can also be replaced with voltage VGH.

[0063] Specifically, during normal display operation, multiple scan lines of the display panel sequentially send display drive signals line by line to activate the thin-film transistors of all pixels in that line, allowing data lines to write image signals so that the display panel can display the corresponding image. Specifically, during the scan line disable period (also known as the display blinking period), the multiple scan lines of the display panel will not send signals. Therefore, electromagnetic insulation (EMI) or touch sensing (if the display panel is a touch panel) can be performed during this period, ensuring that the accuracy of EMI or touch sensing is not affected by the display drive signals. More specifically, during the scan line disable period, the periods for EMI sensing and touch sensing are staggered to ensure that the accuracy of EMI or touch sensing is not affected.

[0064] Figure 5 This is a schematic diagram of a differential amplifier circuit 300 according to an embodiment of the present invention. The differential amplifier circuit 300 includes a diode D2, resistors R0~R4, a capacitor Cf, and an operational amplifier OP. One end of the diode D2 receives an induced voltage Vs, and the other end of the diode D2 is coupled to one end of resistor R0, one end of capacitor Cf, and one end of resistor R3. The other end of resistor R0 and the other end of capacitor Cf are coupled to the radio frequency ground terminal RF_GND. The other end of resistor R3 and one end of resistor R4 are coupled to the non-inverting input terminal of the operational amplifier OP (in... Figure 5 (Indicated by the symbol "+"), the other end of resistor R4 is coupled to ground GND, and one end of resistor R1 and one end of resistor R2 are coupled to the inverting input of operational amplifier OP (in Figure 5 (Indicated by the symbol "-"), the other end of resistor R2 is coupled to the output terminal of operational amplifier OP, the positive power supply terminal of operational amplifier OP is coupled to the system voltage V+, and the negative power supply terminal of operational amplifier OP is coupled to the ground terminal GND.

[0065] In an embodiment of the present invention, diode D2 is a Schottky diode. During the scan line disabling period of the display panel, diode D2, resistor R0, and capacitor Cf of the differential amplifier circuit 300 are used to perform half-wave rectification on the induced voltage Vs received by diode D2 to generate voltage V2. Then, the operational amplifier OP and resistors R1-R4 of the differential amplifier circuit 300 amplify voltage V2 to correspondingly generate an output voltage Vout, where, according to the differential amplification formula, the output voltage Vout = (V2 - voltage V1) × (R2 / R1). In an embodiment of the present invention, the differential amplifier circuit 300 can be implemented using the built-in functions of a display driver IC (DDI) or an external microcontroller unit (MCU).

[0066] The determination circuit 400 is used during the scan line disable period of the display panel. The differential amplifier circuit 300 receives the output voltage Vout and determines whether to activate the anti-interference mechanism based on the output voltage Vout. Specifically, the determination circuit 400 compares the output voltage Vout with a voltage threshold to determine whether to activate the anti-interference mechanism. In embodiments of the present invention, the voltage threshold is set by the designer or is associated with the EMS tolerance of the driver IC of the liquid crystal display module of the display panel. In embodiments of the present invention, the determination circuit 400 can be implemented by a comparator or an analog-to-digital converter (ADC). In embodiments of the present invention, the determination circuit 400 can be implemented using the built-in functions of a DDI or an external MCU.

[0067] Figure 6 This is a schematic diagram of the arrangement of a dipole antenna 100 according to an embodiment of the present invention. Figure 6 As shown, the dipole antenna 100 is disposed on the display panel driver IC (DDI) (in Figure 6 The dipole antenna 100 is positioned above the display panel (DP) and between the flexible printed circuit board (FPC). The dipole antenna 100 is arranged around the active area (AA) of the display panel (DP). It is worth noting that... Figure 6The arrangement of the dipole antenna 100 shown (starting from below the display panel DP, and arranged below and on the left and right sides of the display panel DP) is only an example. The actual arrangement of the dipole antenna 100 will depend on the length of the dipole antenna 100 and the size of the display panel DP (for example, the dipole antenna 100 may only be arranged below the display panel DP, or the dipole antenna 100 may start from below the display panel DP and be arranged below, on the left and right sides of the display panel DP, and above it). In the embodiments of the present invention, the dipole antenna 100 is a half-wave dipole antenna or a quarter-wave dipole antenna, and the length of the dipole antenna 100 is determined by the corresponding frequency of the interference source or the corresponding frequency range of the interference source.

[0068] When the dipole antenna 100 is a quarter-wavelength dipole antenna, since the wavelength is the speed of light (i.e., the speed of light propagation) divided by the frequency, the length of the dipole antenna 100 is designed based on: the speed of light divided by the corresponding frequency of the interference source, then divided by 4. Accordingly, the length of each of the conductive elements 110 and 120 is: the speed of light divided by the corresponding frequency of the interference source, then divided by 8. For example, if the corresponding frequency of the interference source is 100 MHz, then the lengths of both conductive elements 110 and 120 are designed to be (300 × 10⁻⁶). 6 ) / ((100×10 6 ( ) ×8) = 0.375 meters = 37.5 centimeters.

[0069] When the dipole antenna 100 is a half-wave dipole antenna, the length of the dipole antenna 100 is designed based on: the speed of light divided by the corresponding frequency of the interference source, then divided by 2. Accordingly, the length of each of the conductive elements 110 and 120 is: the speed of light divided by the corresponding frequency of the interference source, then divided by 4. For example, if the corresponding frequency range of the interference source is 380~876MHz, then the corresponding frequency of the interference source is taken as the midpoint, 628MHz. Therefore, the lengths of both conductive elements 110 and 120 are designed to be (300×10...). 6 ) / ((628×10 6 () ×4) = 0.1194 meters = 11.94 centimeters.

[0070] Figure 7 This is a flowchart of an electromagnetic susceptibility anti-interference method according to an embodiment of the present invention. In step S1, it is determined whether the display panel is in a scan line disabled period. If the determination result of step S1 is negative, proceed to step S2, as... Figure 7 and Figures 1 to 3 As shown, the display panel performs a normal driving process (i.e., during the normal display period of the display panel), so that the dipole antenna 100 is grounded, and the differential amplifier circuit 300 and the judgment circuit 400 are disabled. If the judgment result of step S1 is yes, proceed to step S3, as follows. Figure 7 , Figure 1, Figure 2 and Figure 4 As shown, when the display panel is in the scan line disabled period (i.e., during the scan line disabled period of the display panel), the dipole antenna 100 is floating to perform electromagnetic immunity induction against the interference source, thereby causing the detection circuit 200 to generate an induced voltage Vs. Then, the differential amplifier circuit 300 rectifies and differentially amplifies the induced voltage Vs to generate an output voltage Vout. The judgment circuit 400 determines whether to activate the anti-interference mechanism based on the output voltage Vout.

[0071] Figure 8 This is a detailed flowchart of an electromagnetic tolerance and anti-interference method according to an embodiment of the present invention. Figure 8 Steps S1 to S2 and Figure 7 Steps S1 to S2 are the same and will not be repeated here. In step T1, the dipole antenna is floating to induce electromagnetic immunity to the interference source, thereby generating an induced voltage, and then correspondingly generating an output voltage. In step T2, the output voltage is compared with a voltage threshold by a judgment circuit to determine whether the output voltage is greater than the voltage threshold. If the judgment result of step T2 is negative, proceed to step T3, and the anti-interference mechanism is not activated. If the judgment result of step T2 is positive, proceed to step T4, and increment the count value by 1, where the initial value of the count value is 0. Next, in step T5, the count value is compared with the counting threshold N by a judgment circuit to determine whether the count value is greater than or equal to the counting threshold N. If the judgment result of step T5 is negative, return to step T2. If the judgment result of step T5 is positive, proceed to step T6, activate the anti-interference mechanism, and reset the count value to zero.

[0072] Since the judgment in step T2 is performed frame by frame, in other words, the operations corresponding to steps T2, T4, T5 and T6 are as follows: During the scan line disabling period of the display panel, the judgment circuit compares the output voltage with the voltage threshold. When the comparison result of N consecutive frames is that the output voltage exceeds the voltage threshold, it is determined that the EMS interference of the interference source needs to be suppressed, so the anti-interference mechanism is activated, where N is a positive integer, for example, 3.

[0073] In an embodiment of the present invention, the anti-interference mechanism in step T6 is to increase the input current of the low-voltage differential signaling (LVDS) receiver of the display panel to enhance resistance to interference from EMS. On the other hand, the anti-interference mechanism in step T3 is to keep the input current of the LVDS receiver of the display panel at a preset value.

[0074] Based on the above, the electromagnetic susceptibility anti-interference circuit and electromagnetic susceptibility anti-interference method proposed in this invention do not require the use of conductive tape or absorbing materials, which can save time and cost in product manufacturing. In addition, the electromagnetic susceptibility anti-interference circuit and electromagnetic susceptibility anti-interference method proposed in this invention will only activate the anti-interference mechanism under specific circumstances (during the scanning line of the display panel is disabled and the comparison results of N consecutive frames must all show that the output voltage exceeds the voltage threshold), thereby improving the EMS and EMI improvement measures will present a trade-off state.

[0075] It is worth mentioning that this invention addresses problems in automotive applications and proposes a solution (MobilitySolution). Please refer to... Figure 9 . Figure 9 This is an example of an automotive display device 20 according to an embodiment of the present invention. The automotive display device 20 can be applied to a head-up display (HUD) of a vehicle 900, but is not limited thereto. The automotive display device 20 may include a base 21 and a display panel 22. The base 21 may be disposed in the driver's area (DR) of the vehicle 900. The display panel 22 may be disposed on the base 21, wherein the display panel 22 is provided with... Figure 1 The electromagnetic tolerance and anti-interference circuit 10 shown is shown.

[0076] The foregoing has outlined the features of several embodiments, thus enabling those skilled in the art to better understand the nature of the invention. Those skilled in the art should recognize that they can easily use this invention as a basis to design or modify other processes and structures, thereby achieving the same objectives and / or advantages as the embodiments described herein. Those skilled in the art should also understand that these equivalent constructions do not depart from the spirit and scope of the invention, and that various changes, substitutions, and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. An electromagnetic resistant anti-interference circuit, suitable for a display panel, characterized in that, include: A dipole antenna is arranged around the effective display area of ​​the display panel; A detection circuit is electrically connected to a feed point of the dipole antenna; A differential amplifier circuit, electrically connected to the detection circuit; and A judgment circuit is electrically connected to the differential amplifier circuit; During a normal display period of the display panel, the detection circuit receives a first voltage from the display panel to ground the dipole antenna and disable the differential amplifier circuit and the judgment circuit. During a scan line disabling period of the display panel, the detection circuit receives a second voltage from the display panel with a voltage level different from the first voltage, so that the dipole antenna performs electromagnetic immunity sensing for an interference source, and the differential amplifier circuit generates an output voltage accordingly based on the induced voltage received from the detection circuit, wherein the judgment circuit is used to determine whether to activate an anti-interference mechanism based on the output voltage.

2. The electromagnetic resistant anti-jamming circuit of claim 1, wherein, The dipole antenna mentioned therein is an indium tin oxide antenna.

3. The electromagnetic resistant anti-jamming circuit of claim 1, wherein, During the scan line disable period of the display panel, the dipole antenna is floating.

4. The electromagnetic tolerance and anti-interference circuit as described in claim 1, characterized in that, The dipole antenna is a half-wave dipole antenna or a quarter-wave dipole antenna, and the feed point divides the dipole antenna into a first conductive element and a second conductive element.

5. The electromagnetic tolerance and anti-interference circuit as described in claim 4, characterized in that, The detection circuit includes: A first transistor, wherein a control terminal of the first transistor is used to receive the first voltage or the second voltage from the display panel, wherein a first terminal of the first transistor is coupled to one end of the first conductive element; A second transistor, wherein a control terminal of the second transistor is used to receive the first voltage or the second voltage from the display panel, wherein a first terminal of the second transistor is coupled to one end of the second conductive element; A third transistor, wherein a first terminal of the third transistor is coupled to the differential amplifier circuit, wherein a second terminal of the third transistor is coupled to the other end of the first conductive element, wherein the other end of the second conductive element is coupled to an RF ground terminal; and An inverter, wherein one end of the inverter is used to receive the first voltage or the second voltage from the display panel, and the other end of the inverter is coupled to a control terminal of the third transistor.

6. The electromagnetic tolerance and anti-interference circuit as described in claim 5, characterized in that, During the normal display period of the display panel, the first transistor and the second transistor are turned on and the third transistor is turned off. During the scan line disabling period of the display panel, the dipole antenna is floating, and the first transistor and the second transistor are turned off and the third transistor is turned on.

7. The electromagnetic susceptibility anti-interference circuit as described in claim 1, characterized in that, During the scan line disabling period of the display panel, the differential amplifier circuit performs half-wave rectification on the induced voltage and then amplifies the voltage to generate the output voltage accordingly.

8. The electromagnetic tolerance and anti-interference circuit as described in claim 1, characterized in that, During the scan line disabling period of the display panel, the judgment circuit compares the output voltage with a voltage threshold. When the comparison result of N consecutive frames is that the output voltage exceeds the voltage threshold, the anti-interference mechanism is activated, where N is a positive integer.

9. The electromagnetic susceptibility anti-interference circuit as described in claim 1, characterized in that, The anti-interference mechanism mentioned above is to increase the input current of the low-voltage differential signal receiver of the display panel.

10. A vehicle display device, characterized in that, It includes the electromagnetic tolerance anti-interference circuit as described in claim 1.

11. An electromagnetic susceptibility and anti-interference method, applicable to a display panel, characterized in that, include: Determine whether the display panel is in a scan line disabled period; When it is determined that the display panel is not in the scan line disabled period, the display panel performs the normal driving process, and a dipole antenna arranged around the effective display area of ​​the display panel is grounded. and When it is determined that the display panel is in the scan line disabled period, the dipole antenna performs electromagnetic immunity induction on an interference source, thereby generating an induced voltage. Then, the induced voltage is rectified and differentially amplified to generate an output voltage, and an anti-interference mechanism is activated based on the output voltage.

12. The electromagnetic susceptibility anti-interference method as described in claim 11, characterized in that, The determination of whether to activate an anti-interference mechanism based on the output voltage includes: The output voltage is compared with a voltage threshold; and If the comparison results of N consecutive frames are all that the output voltage exceeds the voltage threshold, then the anti-interference mechanism is activated, where N is a positive integer.

13. The electromagnetic susceptibility and anti-interference method as described in claim 11, characterized in that, The anti-interference mechanism mentioned above is to increase the input current of the low-voltage differential signal receiver of the display panel.

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