Anti-static interference circuit, screen module, display panel and electronic equipment

Abstract

The utility model relates to an anti-static interference circuit, a screen module, a display panel and electronic equipment. The anti-static interference circuit comprises a comparison circuit, the input end of the comparison circuit is connected with a target voltage source and a reference voltage source so as to compare a target voltage output by the target voltage source with a reference voltage output by the reference voltage source and then output a comparison signal, the target voltage is a source driving voltage input to a pixel circuit column, and the reference voltage is a reference voltage output by the reference voltage source; the reference voltage is the source electrode reference voltage of the pixel circuit column in a normal state; and the inverting circuit is arranged in the driving voltage input circuit, the driving voltage input circuit is connected with each pixel circuit in the pixel circuit column so as to input a source driving voltage to each pixel circuit, and the inverting circuit is connected with the comparison circuit so as to be switched on and switched off according to the comparison signal. By adopting the anti-static interference circuit, a screen shaking phenomenon can be avoided.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to an anti-static interference circuit, a screen module, a display panel, and an electronic device. Background Art

[0002] With the development of LCD (Liquid Crystal Display) technology, LCD screens have many advantages such as low energy consumption, good display effect, flexible size, and moderate price. Therefore, more and more automobile manufacturers use LCD screens as the display devices for vehicles.

[0003] However, according to the image transmission principle of LCD screens, when an LCD screen is displaying normally, a picture is one frame, and each frame is sequentially voltage-assigned by the row data signals of each row from top to bottom. When a certain frame of image is interfered by static electricity, the voltage of the row data signal may fluctuate, resulting in an error in the row data signal. Therefore, a screen shaking phenomenon may occur. Screen shaking means that the screen picture shakes, such as the upper and lower white bars in the screen picture area being double-imaged, or local double-imaging occurring in a certain area, etc. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide an anti-static interference circuit, a screen module, a display panel, and an electronic device that can reduce the screen shaking phenomenon.

[0005] In a first aspect, the present application provides an anti-static interference circuit. This anti-static interference circuit is connected to the pixel circuit columns in a display panel. The pixel circuit columns include a plurality of pixel circuits arranged in a column direction. The anti-static interference circuit includes:

[0006] A comparison circuit, the input terminals of the comparison circuit are respectively connected to a target voltage source and a reference voltage source to compare the target voltage output by the target voltage source and the reference voltage output by the reference voltage source and then output a comparison signal. The target voltage is the source driving voltage input to the pixel circuit columns, and the reference voltage is the source reference voltage of the pixel circuit columns in a normal state;

[0007] An inverting circuit, which is arranged in a driving voltage input circuit. The driving voltage input circuit is connected to each pixel circuit in the pixel circuit columns to input the source driving voltage to each pixel circuit. The inverting circuit is connected to the comparison circuit to conduct and cut off according to the comparison signal.

[0008] In one of the embodiments, the comparison circuit includes a conversion circuit and a comparator;

[0009] The input terminals of the conversion circuit are respectively connected to the target voltage source and the reference voltage source to convert the target voltage and the reference voltage into digital signals;

[0010] The input terminal of the comparator is connected to the output terminal of the conversion circuit to compare the digital signals after converting the target voltage and the reference voltage and then output a comparison signal.

[0011] In one embodiment, the inverting circuit includes a first switching transistor; the control electrode of the first switching transistor is connected to the output terminal of the comparator, the first electrode of the first switching transistor is connected to the reference voltage source, and the second electrode of the first switching transistor is connected to each pixel circuit.

[0012] In one embodiment, the first switching transistor is a P-channel metal oxide semiconductor.

[0013] In one embodiment, the inverting circuit includes a second switching transistor; the control electrode of the second switching transistor is connected to the output terminal of the comparator, the first electrode of the second switching transistor is connected to a first voltage, and the second electrode of the second switching transistor is connected to each pixel circuit.

[0014] In one embodiment, the second switching transistor is an N-channel metal oxide semiconductor.

[0015] In one embodiment, the inverting circuit controls the first switching transistor to conduct when the comparison signal output by the comparison circuit is at a first level;

[0016] The inverting circuit controls the second switching transistor to conduct when the comparison signal output by the comparison circuit is at a second level.

[0017] In a second aspect, the present application further provides a screen module, and the screen module includes the anti-static interference circuit as described in any one of the above first aspects.

[0018] In a third aspect, the present application further provides a display panel, including the screen module as described in the above second aspect.

[0019] In a fourth aspect, the present application further provides an electronic device, and the electronic device includes the display panel as described in the above third aspect.

[0020] The above anti-static interference circuit, screen module, display panel and electronic device, the anti-static interference circuit is connected to the pixel circuit columns in the display panel, the pixel circuit columns include a plurality of pixel circuits arranged in the column direction, and the anti-static interference circuit includes: a comparison circuit, the input ends of the comparison circuit are respectively connected to a target voltage source and a reference voltage source to compare the target voltage output by the target voltage source and the reference voltage output by the reference voltage source and then output a comparison signal, the target voltage is the source driving voltage input to the pixel circuit columns, and the reference voltage is the source reference voltage of the pixel circuit columns in the normal state; an inverter circuit, which is arranged in the driving voltage input circuit, the driving voltage input circuit is connected to each pixel circuit in the pixel circuit columns to input the source driving voltage to each pixel circuit, and the inverter circuit is connected to the comparison circuit to conduct and cut off according to the comparison signal. In this way, the target voltage and the reference voltage are compared to output a comparison signal, and the conduction and cut-off of the inverter circuit are controlled according to the comparison signal, so as to control whether the driving voltage input circuit inputs the source driving voltage to each pixel circuit. It can be understood that when the target voltage is affected by static electricity, the driving voltage input circuit is controlled not to input the source driving voltage to each pixel circuit, thereby avoiding the static electricity from affecting each pixel circuit and avoiding the occurrence of screen shaking phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a TFT transistor inside a screen module in an embodiment;

[0023] Figure 2 It is a schematic structural diagram of an anti-static interference circuit in an embodiment;

[0024] Figure 3 It is a schematic structural diagram of a comparison circuit in another embodiment;

[0025] Figure 4 It is a schematic structural diagram of an inverter circuit in another embodiment;

[0026] Figure 5 It is a schematic structural diagram of an anti-static interference circuit in another embodiment;

[0027] Figure 6 It is a schematic structural diagram of an anti-static interference circuit in another embodiment;

[0028] Figure 7It is a structural block diagram of an electronic device in an embodiment.

[0029] Description of main component labels:

[0030] Anti-static interference circuit 100; Pixel circuit 200; Driving voltage input circuit 300;

[0031] Comparison circuit 10; Inverting circuit 20;

[0032] Conversion circuit 11; Comparator 12;

[0033] First switching transistor 21; Second switching transistor 22. Detailed implementation

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of this application, the first resistor can be called the second resistor, and similarly, the second resistor can be called the first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0037] It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is an electrical signal or data transmission between the connected circuits, modules, units, etc.

[0038] It can be understood that "at least one" means one or more, and "multiple" means two or more. "At least part of an element" means part or all of the element.

[0039] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc., specify the presence of the stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0040] At present, the screen shaking phenomena that occur when the LCD screen is interfered by static electricity include the following: (1) Shaking appears in a certain area of the LCD screen and can automatically recover after the interference is removed. (2) Fine horizontal white bars appear at the bottom of the LCD screen and can automatically recover after the interference is removed. In order to prevent the screen shaking phenomenon when the LCD screen is interfered by static electricity, the video data transmission link of the LCD screen is analyzed. At present, most LCD screens cooperate with the vehicle head unit control system to achieve the transmission of video data, and the vehicle head unit control system controls the LCD screen to work through I2C transparent transmission.

[0041] The vehicle head unit control system transmits through the CSI (Camera Serial Interface) protocol to the serializer, and the serializer transmits high-speed video signals to the deserializer on the LCD screen side through the forward channel according to the dedicated video link transmission protocol. Some control signals of the deserializer will be transmitted to the serializer side through the reverse channel at the same time. Among them, the rate of the forward channel is generally 3Gbps / 6Gbps, while the reverse channel is generally 187Mbps. Taking the TI deserializer as an example, the video link transmission protocol of the TI deserializer is FPD LINK III&IV (serial bus solution). After the SerDes (Serializer and Deserialize) differential signal is transmitted to the deserializer through the FPD_LINK protocol, the deserializer will output an EDP (Embedded DisplayPort) signal to the TCON (Timing Controller) chip at the rear stage. After being converted by the TCON chip, LVDS (Low-Voltage Differential Signaling) differential signals are output, providing corresponding data and control signals specifically for the rear stage of the screen.

[0042] The LVDS differential signals converted by the TCON chip are transmitted to the source integrated circuit (SOURCE IC) and the gate integrated circuit (GATE IC) inside the screen module. The SOURCE IC and the GATE IC drive different magnitudes of polar voltages. The SOURCE IC drives the source voltage of the thin-film transistor (TFT) inside the module, and the GATE IC drives the gate voltage of the TFT inside the module. By controlling the magnitudes of the gate voltage and the source voltage, the source and drain of the TFT are turned on and off. When the source voltages are different, the liquid crystal of the internal TFT will deflect continuously, causing each pixel inside to present different gray levels and brightness, and finally achieving real-time imaging on the screen.

[0043] Therefore, the transmission process of the above video data is as follows: in-vehicle control system → serializer → video harness → deserializer → TCON → screen module (SOURCE IC and GATE IC) → screen body. All the above parts, except for the video harness and the screen body, are active devices. Since the video harness is generally shielded twisted pair, the probability of being affected by static electricity is relatively small, and the screen body itself is also passive, so the probability of being affected by static electricity is relatively small. Therefore, the screen shaking phenomenon caused by static interference may be a problem in other active modules.

[0044] To confirm which of the above modules is affected by static interference in the video link transmission, each of the above modules is sequentially put into the BIST mode for confirmation. The BIST mode is a self-test mode in screen link debugging. When a certain module enters the BIST mode, a self-test screen will appear on the LCD screen, that is, by modifying the register values in the chip specification book, a fixed standard pattern or a polling switching screen can appear. For example, the standard Figure 1 generally refers to a fixed-color screen, such as a fixed red, fixed yellow, fixed green, etc. The polling switching screen means that the screen image sequentially displays screens such as red → green → blue → white → black at a certain time interval. Taking the appearance of the standard pattern as an example:

[0045] When a certain module enters the above BIST mode, only this module will normally perform the video data stream transmission work, and the rest of the modules are not working, only having a physical connection. After separately putting the serializer, deserializer, TCON chip, and screen module into the BIST mode and applying static interference, it is found that the screen shaking phenomenon will occur when all modules enter the BIST mode. Since the screen module is the last stage module of the screen, if the serializer, deserializer, or TCON chip is affected by static interference and causes screen shaking, then when entering the BIST mode of the screen module alone, the screen will not show the screen shaking phenomenon. Therefore, it can be determined that the screen shaking phenomenon is caused by the screen module being affected by static interference.

[0046] Analyze the display of the LCD screen. The pictures or graphics displayed on the LCD screen are essentially the filling of each pixel point. The entire screen is divided into horizontal and vertical directions. During the internal data transmission process of the screen module, first, a row of pixel points is filled completely. After filling a row, the pixel points of the next row are filled, and so on. The filling order is: from left to right, from top to bottom. When all the pixel points on the entire LCD screen are filled, one frame of an image is displayed. Usually, an image is not of a single color but a combination of multiple colors. Therefore, the above-mentioned pixel points themselves can display different color lights. Different color lights are achieved by continuously deflecting the liquid crystal voltage, controlled by the internal electric field, and combined with the characteristics of the polarizer to control the light of each pixel point. Each pixel point contains three TFT transistors, and the three TFT transistors respectively control the three primary colors of red (R), green (G), and blue (B). By controlling the voltages of each polarity of the TFT transistors, the different deflections of the liquid crystal are further controlled. At a certain timing, the three pixel points of R, G, and B will be superimposed to form any displayed color.

[0047] The above-mentioned screen shaking phenomenon means that during the transmission of each frame of the image, when an error occurs in the data of a certain row or a certain pixel point in a row, after all the pixel points are filled, due to the existence of incorrect data in this frame of the image, the spliced image of this frame will show the screen shaking phenomenon in the human eye. That is, the light in some pixel points has an unexpected change, and the internal liquid crystal deflection angle is incorrect, resulting in an abnormal part of the displayed image, namely screen shaking.

[0048] The deflection of the liquid crystal inside the LCD screen is achieved by applying different voltages across the liquid crystal, thereby realizing different deflection angles. Generally, TFT transistors are used to control the deflection voltage of the liquid crystal, as Figure 1 Shown is a schematic diagram of the TFT transistors inside the screen module in the normal state. The gate (G) of the TFT is connected to the GATE IC of the screen, the source (S) of the TFT transistor is connected to the SOUICE IC of the screen, and the voltage between the drain (D) of the TFT and the GND realizes the liquid crystal deflection. The magnitude of the drain voltage directly determines the different gray levels and lights inside the pixel point. Figure 1 Each MOS transistor in represents a TFT transistor, and three TFT transistors form a pixel point.

[0049] Such as Figure 1As shown, under normal circumstances, for a certain TFT transistor, when it is turned on, the preset Vs should be 2V. In the on state (when Vgs>0), the two ends of DS are turned on, Vds = 2V, and Cls and Cs at the drain are charged, thereby presenting a predetermined grayscale image, which occupies 1 / 3 of a pixel. When the source S of the TFT transistor is affected by electrostatic interference, the source voltage Vs≠2V at this time, that is, in the on state (when Vgs>0), the two ends of DS are turned on. At this time, because Vds≠2V, it may be larger than 2V or smaller than 2V, and Cls and Cs at the drain will also be charged. However, the grayscale image presented according to the specific Vds voltage must be different from the previous image with Vds = 2V. Finally, when the actual screen is assembled according to multiple pixels, screen jitter will occur.

[0050] In view of this, to reduce the screen jitter phenomenon, the target voltage and the reference voltage are compared to output a comparison signal, and the on and off of the inverter circuit are controlled according to the comparison signal, so as to control whether the driving voltage input circuit inputs the source driving voltage to each pixel circuit. It can be understood that when the target voltage is affected by static electricity, the driving voltage input circuit is controlled not to input the source driving voltage to each pixel circuit, thereby avoiding the static electricity from affecting each pixel circuit and avoiding the generation of screen jitter phenomenon.

[0051] The embodiment of the present application provides an anti-static interference circuit 100, as Figure 2 shown. The anti-static interference circuit 100 is connected to the pixel circuit columns in the display panel. The pixel circuit columns include a plurality of pixel circuits 200 arranged in the column direction. The anti-static interference circuit 100 includes: a comparison circuit 10. The input ends of the comparison circuit 10 are respectively connected to the target voltage source Vdec and the reference voltage source Vref to compare the target voltage output by the target voltage source Vdec and the reference voltage output by the reference voltage source Vref and then output a comparison signal.

[0052] Among them, the target voltage is the source driving voltage input to the pixel circuit column, and the reference voltage is the source reference voltage of the pixel circuit column in the normal state. When it comes to single-line transmission, taking a pixel point in the transmission process of a certain line as an example, when the TFT transistor in this line is in the on state, during the transmission process of this line, if the source electrode of one or more TFT transistors is affected by static electricity and the value of the source driving voltage changes, it will cause the voltage value at both ends of the DS of each TFT transistor after conduction to change unexpectedly compared with the originally set value. As a result, after the different assignments of multiple pixel points are superimposed, a gray-scale image that does not match the actual situation appears. Therefore, it is necessary to monitor the target voltage, that is, the source driving voltage, to determine whether the target voltage is affected by static electricity. If it is affected by static electricity, the data transmission of this line of this pixel point is paused. If it is not affected by static electricity, the data transmission of this line of this pixel point continues. Optionally, the target voltage is compared with the reference voltage. If the value of the target voltage exceeds the preset range of the reference voltage, it is determined that the target voltage may be affected by static electricity. If the value of the target voltage is within the preset range of the reference voltage, it is determined that the target voltage is not affected by static electricity.

[0053] The inverter circuit 20 is provided in the driving voltage input circuit 300. The driving voltage input circuit 300 is connected to each pixel circuit 200 in the pixel circuit column to input the source driving voltage to each pixel circuit 200. The inverter circuit 20 is connected to the comparison circuit 10 to conduct and cut off according to the comparison signal.

[0054] Among them, the driving voltage input circuit 300 is used to input the source driving voltage into each pixel circuit 200. The inverter circuit 20 is connected to the comparison circuit 10 and controls the conduction and cut-off of the inverter circuit according to the comparison signal. Optionally, when the comparison signal indicates that the target voltage is not affected by static electricity, the inverter circuit 20 conducts, and the driving voltage input circuit 300 can normally input the source driving voltage to each pixel circuit 200. When the comparison signal indicates that the target voltage may be affected by static electricity, the inverter circuit 20 cuts off, and the driving voltage input circuit 300 does not input the source driving voltage to each pixel circuit 200. At this time, the TFT transistors of each pixel circuit 200 do not conduct, and the data transmission of this line is paused, thereby avoiding the phenomenon of screen shaking.

[0055] In the above embodiments, the anti-static interference circuit is connected to the pixel circuit columns in the display panel. The pixel circuit columns include a plurality of pixel circuits arranged in the column direction. The anti-static interference circuit includes: a comparison circuit, the input ends of the comparison circuit are respectively connected to a target voltage source and a reference voltage source to compare the target voltage output by the target voltage source and the reference voltage output by the reference voltage source and then output a comparison signal. The target voltage is the source driving voltage input to the pixel circuit columns, and the reference voltage is the source reference voltage of the pixel circuit columns in the normal state; an inverter circuit, which is arranged in the driving voltage input circuit. The driving voltage input circuit is connected to each pixel circuit in the pixel circuit columns to input the source driving voltage to each pixel circuit. The inverter circuit is connected to the comparison circuit to conduct and cut off according to the comparison signal. In this way, the target voltage and the reference voltage are compared and then the comparison signal is output. The conduction and cut-off of the inverter circuit are controlled according to the comparison signal, so as to control whether the driving voltage input circuit inputs the source driving voltage to each pixel circuit. It can be understood that when the target voltage is affected by static electricity, the driving voltage input circuit is controlled not to input the source driving voltage to each pixel circuit, thereby avoiding the static electricity from affecting each pixel circuit and avoiding the occurrence of screen shaking phenomenon.

[0056] In one embodiment, as Figure 3 shown, the comparison circuit 10 includes a conversion circuit 11 and a comparator 12; the input ends of the conversion circuit 11 are respectively connected to the target voltage source Vdec and the reference voltage source Vref to convert the target voltage and the reference voltage into digital signals; the input end of the comparator 12 is connected to the output end of the conversion circuit 11 to compare the digital signals after the conversion of the target voltage and the reference voltage and then output a comparison signal.

[0057] Among them, the conversion circuit 11 may include an analog-to-digital conversion chip. The conversion circuit 11 can convert the target voltage and the reference voltage into digital signals and then output them to the comparator 12. The comparator 12 compares the digital signals after the conversion of the target voltage and the reference voltage and then outputs a comparison signal. Optionally, when the target voltage Vdec is not affected by static interference, that is, the target voltage Vdec is within the preset range of the reference voltage Vref, for example, 0.8Vref≤Vdec≤1.2Vref, the comparison signal may be a low level. When the target voltage is affected by static electricity, that is, the target voltage Vdec is not within the preset range of the reference voltage Vref, for example, Vdec<0.8Vref or Vdec>1.2Vref, the comparison signal may be a high level.

[0058] In the above embodiments, through the comparison circuit, the monitoring of the target voltage is realized, so that it is possible to judge whether the source driving voltage is affected by static electricity according to the target voltage and the reference voltage.

[0059] In one embodiment, as Figure 4As shown, the inverting circuit 20 includes a first switching transistor 21; the control electrode of the first switching transistor 21 is connected to the output terminal of the comparator 12, the first electrode of the first switching transistor 21 is connected to the reference voltage source, and the second electrode of the first switching transistor is connected to each pixel circuit 200.

[0060] Among them, the first switching transistor 21 is a P-channel metal oxide semiconductor. The control electrode of the first switching transistor 21 is connected to the output terminal of the comparator 12. When the target voltage is not affected by electrostatic interference, the comparator 12 outputs a low level to the gate of the PMOS transistor of the first switching transistor 21. At this time, the first switching transistor 21 is turned on, and the reference voltage source of the driving voltage input circuit 300 can normally input the source driving voltage to the TFT transistors of each pixel circuit 200, and the TFT transistors perform row transfer normally. When the target voltage is affected by electrostatic interference, the comparator 12 outputs a high level to the gate of the PMOS transistor of the first switching transistor 21. At this time, the first switching transistor 21 is not turned on, and the reference voltage source of the driving voltage input circuit 300 cannot normally input the source driving voltage to the TFT transistors of each pixel circuit 200, and the TFT transistors pause the current row transfer.

[0061] In one embodiment, please continue to refer to Figure 4 , the inverting circuit 20 includes a second switching transistor 22; the control electrode of the second switching transistor 22 is connected to the output terminal of the comparator 12, the first electrode of the second switching transistor 22 is connected to the first voltage, and the second electrode of the second switching transistor 22 is connected to each pixel circuit 200.

[0062] Among them, the second switching transistor 22 is an N-channel metal oxide semiconductor. The control electrode of the second switching transistor 22 is connected to the output terminal of the comparator 12. When the target voltage is not affected by electrostatic interference, the comparator 12 outputs a low level to the gate of the NMOS transistor of the second switching transistor 22. At this time, the second switching transistor 22 is not turned on. When the target voltage is affected by electrostatic interference, the comparator 12 outputs a high level to the gate of the NMOS transistor of the second switching transistor 22. At this time, the second switching transistor 22 is turned on. As described above, at this time, the first switching transistor 21 is not turned on. At this time, the source driving voltage of the TFT transistors of each pixel circuit 200 is the first voltage, and the first voltage is set to a voltage that does not turn on the TFT. Therefore, the TFT transistors are not turned on and the current row transfer is paused.

[0063] Optionally, the inverting circuit 20 controls the first switching transistor 21 to turn on when the comparison signal output by the comparison circuit 10 is the first level; the inverting circuit 20 controls the second switching transistor 22 to turn on when the comparison signal output by the comparison circuit 10 is the second level.

[0064] Among them, the first level is a low level, and the second level is a high level. From the types of the first switching transistor 21 and the second switching transistor 22 described above, it can be known that the inverter circuit 20 turns on the first switching transistor 21 and turns off the second switching transistor 22 when the comparison signal output by the comparison circuit 10 is at a low level. The inverter circuit 20 turns off the first switching transistor 21 and turns on the second switching transistor 22 when the comparison signal output by the comparison circuit 10 is at a high level.

[0065] In the embodiments of the present application, as Figure 5 shown, it is a schematic structural diagram of the anti-static interference circuit 100 provided in this embodiment. In the figure, the conversion circuit 11 is an analog-to-digital conversion chip ADC_7. After being affected by static electricity interference, by monitoring the actual voltage value of the actual SOUICIC pin, that is, the actual value of the source drive voltage, and comparing it with the reference value of this pin in the ideal state, that is, the reference voltage, after being converted by the digital-to-analog conversion chip ADC_7, a comparison signal is output after being compared by the comparator 12. The inverter circuit 20 is an inverter M1. When the comparator outputs a high level, the first switching transistor 21 is turned off, that is, the PMOS transistor is turned off, and the second switching transistor 22 is turned on, that is, the NMOS transistor is turned on, so that the gate of the TFT transistor Q16 of the pixel circuit becomes a high level and is not turned on, thereby pausing the transmission of a row of pixel points. After the actual picture is spliced, there is no visible change to the naked eye, achieving the solution to the problem of static screen shaking and meeting the static electricity requirement standard.

[0066] Specifically, after being converted by the ADC_7 chip, the Vref pin outputs a low-level digital signal "0". At this time, the digital level signal of Vref is given to the subsequent comparator 12. Monitor the value of the actual source drive voltage, that is, the target voltage Vdec. If the value is within the range of Vdec < 0.8Vref or Vdec > 1.2Vref, it indicates that the SOUICE IC pin has been affected by static electricity. Then, the D2 pin of the ADC_7 chip will output a high-level digital signal "1". At this time, the subsequent comparator 12 will output a high level to the NMOS gate of the inverter M1, setting the NMOS gate voltage Vg greater than VDD. At this time, the NMOS transistor in the inverter M1 conducts. After conduction, the S level of the TFT transistor Q16 is high level, so the TFT transistor does not conduct, and the transmission of this row is paused. When the detected value of the target voltage Vdec is within the range of 0.8Vref ≤ Vdec ≤ 1.2Vref, at this time, the SOUICE IC pin is not affected by static electricity, then the D2 pin of the ADC_7 chip will output a low-level digital signal "0". At this time, the subsequent comparator 12 will output a low level to the PMOS gate of the inverter M1. At this time, Vref is greater than Vg, so the PMOS conducts. Therefore, the S-level voltage of the subsequent TFT transistor is the normal reference voltage Vref, and the TFT transistor transmits normally. Optionally, when this row is in the off state under normal conditions, if the source voltage S is smaller than the gate voltage -15V, the TFT transistor will also be mis-conducted in this case. For this situation, the above circuit can also be satisfied.

[0067] In the above embodiment, it is possible to monitor at any time whether each column is affected by static electricity during the single-row transmission process. When affected by static electricity, a high level is output through the conversion circuit and the comparator, making the NMOS transistor of the inverter conduct. Furthermore, it is ensured that the source of the subsequent TFT transistor is at a high level, pausing the transmission of the TFT transistor and maintaining the image of the previous row. There will be no abnormal jitter phenomenon in the actual image, thus meeting the static electricity requirements. When this row is in the paused transmission state under normal conditions, the inverter outputs a high level through the above circuit, and there will be no mis-conduction situation, meeting the normal transmission requirements.

[0068] In one embodiment, as Figure 6 shown, an anti-static interference circuit 100 is added to the source of each column pixel circuit to achieve the monitoring and control of the source drive voltage, avoiding mis-conduction or mis-turn-off caused by being affected by static electricity. The anti-static interference circuit 100 added to each row is as described in the above embodiment, and the circuit structure diagram can be as Figure 5 described.

[0069] In the embodiment of the present application, as Figure 7 shown, a screen module is further provided. The screen module includes the anti-static interference circuit 100 described in any one of the above embodiments.

[0070] In the embodiments of the present application, as Figure 7 shown, a display panel is further provided, and the display panel includes a screen module as described in the above embodiments.

[0071] In the embodiments of the present application, as Figure 7 shown, an electronic device is further provided, and the electronic device includes a display panel as described in the above embodiments.

[0072] In the description of this specification, the description with reference to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0073] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in the present application.

[0074] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An anti-static interference circuit, characterized in that: The anti-static interference circuit is connected to a pixel circuit column in the display panel, the pixel circuit column includes a plurality of pixel circuits arranged along a column direction, and the anti-static interference circuit includes: a comparison circuit, wherein the input terminals of the comparison circuit are respectively connected to a target voltage source and a reference voltage source, so as to compare a target voltage output by the target voltage source with a reference voltage output by the reference voltage source and then output a comparison signal, wherein the target voltage is a source driving voltage input to the pixel circuit column, and the reference voltage is a source reference voltage of the pixel circuit column in a normal state; An inverting circuit is arranged in a driving voltage input circuit, wherein the driving voltage input circuit is connected to each of the pixel circuits in the pixel circuit column to input the source driving voltage to each of the pixel circuits, and the inverting circuit is connected to the comparison circuit to be turned on and off according to the comparison signal.

2. The anti-static interference circuit according to claim 1, characterized in that: The comparison circuit includes a conversion circuit and a comparator; The input end of the conversion circuit is connected to the target voltage source and the reference voltage source respectively to convert the target voltage and the reference voltage into digital signals; The input end of the comparator is connected to the output end of the conversion circuit to compare the target voltage and the digital signal converted from the reference voltage and then output the comparison signal.

3. The anti-static interference circuit according to claim 2, characterized in that: The inverting circuit includes a first switch tube; a control electrode of the first switch tube is connected to the output end of the comparator, a first electrode of the first switch tube is connected to the reference voltage source, and a second electrode of the first switch tube is connected to each pixel circuit.

4. The anti-static interference circuit according to claim 3, characterized in that: The first switch tube is a P-channel metal oxide semiconductor.

5. The anti-static interference circuit according to claim 4, characterized in that: The inverting circuit includes a second switch tube; a control electrode of the second switch tube is connected to the output end of the comparator, a first electrode of the second switch tube is connected to a first voltage, and a second electrode of the second switch tube is connected to each of the pixel circuits.

6. The anti-static interference circuit according to claim 5, characterized in that: The second switch tube is an N-channel metal oxide semiconductor.

7. The anti-static interference circuit according to claim 6, characterized in that: The inverting circuit controls the first switch tube to be turned on when the comparison signal output by the comparison circuit is at a first level; The inverting circuit controls the second switch tube to be turned on when the comparison signal output by the comparison circuit is at a second level.

8. A screen module, characterized in that: The screen module includes an anti-static interference circuit as described in any one of claims 1 to 7 above.

9. A display panel, characterized in that: The display panel comprises the screen module as claimed in claim 8 above.

10. An electronic device, characterized in that: The electronic device comprises the display panel as claimed in claim 9.

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