Grating compensation driving circuit, grating compensation method and display module

Abstract

The invention discloses a grating compensation driving circuit, a grating compensation method and a display module. The circuit includes: a controller; the driving circuit is connected with the controller, and n output ends of the driving circuit are respectively connected with n electrode ports of the grating module; the driving circuit is used for outputting a corresponding driving signal voltage; n input ends of the multi-channel selection circuit are respectively connected with the corresponding n electrode ports, and the multi-channel selection circuit is used for sequentially outputting sampling signals of the electrode ports; the input end of the signal acquisition module is connected with the output end of the multi-channel selection circuit, and the output end of the signal acquisition module is connected with the controller; and the controller is used for adjusting the driving signal voltage output to each electrode port by the driving circuit according to the acquired sampling signal of each electrode port. According to the embodiment of the invention, each driving signal voltage output by the driving circuit can be adjusted, so that each strip-shaped electrode receives the same voltage, pure-color picture display is realized, and the stripe phenomenon is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a grating compensation driving circuit, a grating compensation method and a display module. Background Art

[0002] At present, in a liquid crystal display device, multiple strip gratings need to be connected to a driving circuit through signal wiring to receive a driving signal voltage provided by the driving circuit. When displaying a picture of the same gray scale, the driving signal voltage provided by each output terminal of the driving circuit is usually kept consistent.

[0003] Due to differences in the actual production process, the signal routing in different grating modules is different. And because the different internal signal routings connecting the various strip gratings are different in length and bending, the signal routing corresponding to different strip electrodes in the same grating module will also be different.

[0004] Therefore, even if the driving circuit provides the same driving signal voltage, since each strip grating is affected differently by the signal routing, the voltage actually received by each strip electrode will be different, resulting in stripes when displaying the same grayscale image. Summary of the invention

[0005] The embodiments of the present application provide a grating compensation driving circuit, a grating compensation method and a display module, which can improve the stripe phenomenon when a liquid crystal device displays the same grayscale image in the related art.

[0006] In a first aspect, an embodiment of the present application provides a grating compensation driving circuit, which is applied to a display module, including:

[0007] Controller;

[0008] A driving circuit, wherein the input end of the driving circuit is connected to the controller, and the n output ends of the driving circuit are respectively connected to the n electrode ports of the grating module; wherein the electrode ports are electrically connected to the corresponding n strip electrodes; the driving circuit is used to output a corresponding driving signal voltage according to the instruction signal provided by the controller;

[0009] A multi-channel selection circuit, wherein n input terminals of the multi-channel selection circuit are respectively connected to corresponding n electrode ports; the multi-channel selection circuit is used to output sampling signals of each electrode port in sequence;

[0010] A signal acquisition module, wherein the input end of the signal acquisition module is connected to the output end of the multi-channel selection circuit, and the output end of the signal acquisition module is connected to the controller;

[0011] The controller is used to adjust the driving signal voltage output by the driving circuit to each electrode port according to the sampling signal of each electrode port obtained.

[0012] In a second aspect, an embodiment of the present application provides a grating compensation method, which is applied to the grating compensation driving circuit of the first aspect, and the method includes:

[0013] When the driving circuit provides driving signal voltages to the n electrode ports, the camera module is controlled to capture and obtain the display brightness of multiple sub-display areas; wherein the multiple sub-display areas are display areas corresponding to the multiple strip electrodes of the grating respectively;

[0014] adjusting the driving signal voltages of the n output terminals of the driving circuit based on the display brightness of each sub-display area so that the display brightness of each sub-display area matches the target brightness corresponding to the first gray scale;

[0015] Acquire n first sampling signals corresponding to n electrode ports respectively through a signal acquisition module;

[0016] Generate a first proportional relationship according to the voltage magnitudes of the n first sampling signals; wherein the first proportional relationship includes the voltage ratio between the first sampling signals;

[0017] Controlling the driving circuit to provide a driving signal voltage corresponding to a second grayscale to the n electrode ports; wherein the second grayscale is at least one grayscale within a target grayscale interval;

[0018] Obtain a reference sampling signal corresponding to one of the electrode ports through a signal acquisition module;

[0019] Based on the first proportional relationship, the driving signal voltages of the remaining (n-1) output terminals of the driving circuit are adjusted so that the voltage ratios of the second sampling signals corresponding to the remaining (n-1) electrode ports and the reference sampling signals satisfy the first proportional relationship.

[0020] In a third aspect, an embodiment of the present application provides a display module, comprising the grating compensation driving circuit of the first aspect.

[0021] Compared with the prior art, the grating compensation driving circuit, grating compensation method and display module provided by the embodiment of the present application can collect sampling signals of each electrode port through a multi-channel selection circuit. When the sampling signals of each electrode port are inconsistent, the driving signal voltage of each output end of the driving circuit can be adjusted to make the voltage magnitude of the sampling signal of each electrode port consistent, thereby making the voltage magnitude received by each strip electrode consistent, thereby achieving pure color screen display under the same grayscale. By adjusting the driving signal voltage output to each electrode port, the electrode difference of different strip electrodes in the grating module can be compensated, achieving pure color screen display and improving the stripe phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the module structure of a grating compensation driving circuit provided in one embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the film structure of a grating module provided in one embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a module structure of a driving circuit provided in an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of a circuit structure of a driving circuit provided in an embodiment of the present application;

[0027] Figure 5 is a circuit structure diagram of a multi-channel selection circuit provided in an embodiment of the present application;

[0028] Figure 6 It is a schematic diagram of the structure of strip electrodes and connecting wiring provided by an embodiment of the present application;

[0029] Figure 7 is a flow chart of a grating compensation method provided in one embodiment of the present application;

[0030] Figure 8 Schematic diagram of equivalent resistance of strip electrodes and connecting wires provided in one embodiment of the present application;

[0031] Fig. 9 is a schematic diagram of the structure of a display module provided in one embodiment of the present application;

[0032] Fig.10 It is a structural schematic diagram of a display module provided in another embodiment of the present application.

[0033] In the attached figure:

[0034] 10. Controller; 20. Driving circuit; 30. Multi-channel selection circuit; 40. Signal acquisition module; 21. First signal amplifying circuit; 22. Second signal amplifying circuit; 31. Multi-channel selection unit; 50. External communication interface. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0038] At present, in a liquid crystal display device, multiple strip gratings need to be connected to a driving circuit through signal wiring to receive a driving signal voltage provided by the driving circuit. When displaying a picture of the same gray scale, the driving signal voltage provided by each output terminal of the driving circuit is usually kept consistent.

[0039] Due to differences in the actual production process, the signal routing in different grating modules is different. And because the different internal signal routings connecting the various strip gratings are different in length and bending, the signal routing corresponding to different strip electrodes in the same grating module will also be different.

[0040] Therefore, even if the driving circuit provides the same driving signal voltage, since each strip grating is affected differently by the signal routing, the voltage actually received by each strip electrode will be different, resulting in stripes when displaying the same grayscale image.

[0041] In order to solve the above technical problems, the embodiments of the present application provide a grating compensation driving circuit, a grating compensation method and a display module. The display panel provided by the embodiments of the present application is first introduced below.

[0042] Figure 1 The structure diagram of a grating compensation driving circuit 20 provided in one embodiment of the present application is shown. The grating compensation driving circuit 20 can be applied to a display panel. The grating compensation driving circuit 20 may include a controller 10, a driving circuit 20, a multi-channel selection circuit 30 and a signal acquisition module 40.

[0043] The display module includes a grating module, which includes n mutually independent strip electrodes, a whole-surface electrode, and an FPC (Flexible circuit board) electrically connected to the strip electrodes and the whole-surface electrode. The FPC is provided with electrode ports electrically connected to the strip electrodes and electrode ports electrically connected to the whole-surface electrode.

[0044] Figure 2 A schematic diagram of the film structure of a single liquid crystal pixel in a grating module is shown, including an array substrate 41 , a gate insulating layer 42 , a passivation layer 43 , a gate 44 , a metal layer 45 , a first conductive film 46 and a second conductive film 47 .

[0045] After applying different voltage signals to the strip electrodes and the whole surface electrodes, for each liquid crystal pixel, one of the conductive films near the liquid crystal pixel can receive the voltage signal on the strip electrode through the TFT (Thin film Transistor), and the other conductive film can receive the voltage signal on the whole surface electrode. When the conductive films near the liquid crystal pixel are powered on, an electric field can be formed in the surrounding area of ​​the two conductive films, and the liquid crystal within the electric field can be deflected, so that the light emitted by the backlight source can pass through the liquid crystal layer.

[0046] The input end of the driving circuit 20 can be connected to the controller 10, and the n output ends of the driving circuit 20 are respectively connected to the n electrode ports in the grating module, and the n electrode ports are respectively electrically connected to the corresponding n strip electrodes. Figure 1 As shown, the n output ends of the driving circuit 20 can be connected to the n electrode ports SEG1, SEG2, ..., SEGn of the grating module respectively. SEG1, SEG2, ..., SEGn can be connected to n strip electrodes respectively, and the COM port of the grating module can be connected to the entire surface electrode.

[0047] The driving circuit 20 can send corresponding voltage signals to the n strip electrodes separately through the n output terminals. Under the instruction signal provided by the controller 10, the driving circuit 20 can output the corresponding driving signal voltage to the corresponding strip electrode through each output terminal.

[0048] The multi-channel selection circuit 30 includes n input terminals, and the n input terminals are also respectively connected to the n electrode ports in the grating module. When the driving circuit 20 outputs the corresponding driving signal voltage to each electrode port, the multi-channel selection circuit 30 can sample and output the sampling signal of each electrode port. In addition, the multi-channel selection circuit 30 can realize the cyclic output of the sampling signals of the n electrode ports by switching the sampling signal output of each electrode port in turn.

[0049] An input end of the signal acquisition module 40 may be connected to an output end of the multi-channel selection circuit 30 , and an output end of the signal acquisition module 40 may be connected to the controller 10 .

[0050] When the multi-channel selection circuit 30 switches to output the sampling signal of a certain electrode port, the controller 10 can obtain the sampling signal of the electrode port. When the multi-channel selection circuit 30 switches to output the sampling signals of each electrode port in turn, the controller 10 can obtain the sampling signals of each electrode port in turn.

[0051] It should be noted that the signal acquisition module 40 can perform voltage conversion on the sampling signal output by the multi-channel selection circuit 30, so that the voltage output after conversion is within the input voltage range of the sampling port of the controller 10. It is understandable that if the controller 10 itself has a voltage conversion function, the sampling port of the controller 10 can also be directly connected to the output end of the multi-channel selection circuit 30, eliminating the signal acquisition module 40.

[0052] Since there is a connecting line between the output end of the driving circuit 20 and the strip electrode, when the two output ends of the driving circuit 20 are respectively connected to the two strip electrodes, if there is a difference in the routing design of the two connecting lines, the lengths of the two connecting lines will be different, thereby causing the equivalent resistances of the two connecting lines to be different. If the driving circuit 20 outputs the same driving signal voltage through the two output ends, when the equivalent resistances of the two connecting lines are inconsistent, the voltage division effect generated by the resistance voltage division is also different, resulting in different voltages finally received by the two strip electrodes. In addition, during the manufacturing process, not only are there length differences in the connecting lines corresponding to the two strip electrodes in the same grating module, but there may also be length differences in the connecting lines corresponding to the same strip electrode in two different grating modules.

[0053] When the multiple output terminals of the driving circuit 20 output the same driving voltage signal, the controller 10 can collect the sampling signals of each electrode port. Since the electrode port is located between the output terminal of the driving circuit 20 and the strip electrode, the sampling signals of each electrode port will be different under the voltage division of the connecting wiring. The controller 10 can adjust the driving signal voltage output by the driving circuit 20 to each electrode port according to the sampling signal collected by each electrode port. For example, after the controller 10 obtains the sampling signals of two electrode ports, if the sampling signal of the first electrode port is greater than the sampling signal of the second electrode port, the controller 10 can control the driving circuit 20 to reduce the driving signal voltage output to the first electrode port so that the voltages of the sampling signals of the two electrode ports are consistent.

[0054] Similarly, for n electrode ports, the controller 10 adjusts the driving signal voltage output to each electrode port by controlling the driving circuit 20, so that the voltage of the sampling signal of the n electrode ports can be kept consistent. At this time, it can be considered that the voltage actually received by the n strip electrodes is kept consistent. When the display module needs to display a pure color picture of the same grayscale, the voltage received by each strip electrode is kept consistent, which can make the brightness of each liquid crystal pixel point consistent, thereby realizing the display of a pure color picture.

[0055] It should be noted that when displaying a pure color picture of the same grayscale, the controller 10 can keep the brightness of each liquid crystal pixel consistent after adjusting the driving signal voltage of each electrode port. At this time, the driving signal voltage corresponding to each electrode port can be stored as the driving signal voltage corresponding to each liquid crystal pixel under the grayscale. When it is necessary to display a pure color picture under the grayscale, the driving signal voltage of each liquid crystal pixel can be read and output to the corresponding strip electrodes through multiple output terminals of the driving circuit 20 to realize the display of a pure color picture under the grayscale.

[0056] In this embodiment, the controller 10 can collect sampling signals from each electrode port through the multi-channel selection circuit 30. When the sampling signals from each electrode port are inconsistent, the driving signal voltages of each output terminal of the driving circuit 20 can be adjusted to make the sampling signal size of each electrode port consistent, thereby making the voltage size received by each strip electrode consistent, thereby achieving pure color screen display under the same grayscale. By adjusting the driving signal voltage output to each electrode port, the electrode difference of different strip electrodes in the grating module can be compensated, achieving pure color screen display and improving the stripe phenomenon.

[0057] It should be noted that the above embodiments only exemplify the process of adjusting and compensating the driving signal voltage under a single grayscale to achieve a pure color image display. In the grayscale interval that needs to be adjusted and compensated, the adjustment and compensation can be performed for each grayscale separately, or some binding point grayscales can be selected in the grayscale interval. After adjusting and compensating each binding point grayscale, the compensation result of the remaining non-binding point grayscale is obtained by linear fitting or nonlinear fitting. For example, taking the grayscale interval that needs to be adjusted and compensated as 0-16 grayscale as an example, adjustment and compensation can be performed for each grayscale in 0-16 grayscales to obtain the driving signal voltage corresponding to each liquid crystal pixel at each grayscale. It is also possible to select 2, 4, 8, and 16 grayscales from 0-16 grayscales as binding point grayscales to obtain the driving signal voltage corresponding to each liquid crystal pixel at each binding point grayscale. Taking a single liquid crystal pixel as an example, after obtaining the driving signal voltage corresponding to the binding point grayscale 8 and the binding point grayscale 16, if it is necessary to display grayscale 12, a linear fitting or nonlinear fitting can be performed based on the driving signal voltage corresponding to the binding point grayscale 8 and the driving signal voltage corresponding to the binding point grayscale 16, and the driving signal voltage corresponding to the grayscale 12 can be determined according to the fitting function. In addition, the driving signal voltage corresponding to the grayscale 12 obtained based on the driving signal voltage corresponding to the binding point grayscale 8 and the binding point grayscale 16 can also be obtained by means of mean calculation, weighted mean calculation, etc., which are not limited here.

[0058] Please refer to Figure 3 In some embodiments, the driving circuit 20 may include a first signal amplifying circuit 21 and n second signal amplifying circuits 22 .

[0059] An input terminal of the first signal amplifying circuit 21 is connected to a first voltage signal terminal DAC of the controller 10 , and the controller 10 can output a first voltage signal through the first voltage signal terminal DAC.

[0060] The input ends of the n second signal amplifying circuits 22 are all short-circuited with the output of the first signal amplifying circuit 21 , and the output ends of the n second signal amplifying circuits 22 are respectively connected with the corresponding n electrode ports.

[0061] The first voltage signal terminal DAC of the controller 10 can provide a first voltage signal to the first signal amplifying circuit 21 , and adjust the signal amplification factor of the first signal amplifying circuit 21 and the signal amplification factors of the n second signal amplifying circuits 22 , respectively.

[0062] The driving signal voltage outputted by each output terminal of the driving circuit 20 is the voltage after the first voltage signal is amplified by the first signal amplifying circuit 21 and the corresponding second signal amplifying circuit 22. After determining the signal amplification factor of the first signal amplifying circuit 21, by adjusting the signal amplification factors of each second signal amplifying circuit 22, each output terminal of the driving circuit 20 can independently output different driving signal voltages.

[0063] Please refer to Figure 4 In some embodiments, the first signal amplifying circuit 21 may include a first total resistor Rtotal1, a second total resistor Rtotal2, a first operational amplifier U1 and a first variable resistor VRtotal1.

[0064] The inverting input terminal of the first operational amplifier U1 is grounded through the first total resistor Rtotal1, and the non-inverting input terminal of the first operational amplifier U1 is connected to the controller 10 through the second total resistor Rtotal2. The controller 10 can provide a first voltage signal to the non-inverting input terminal of the first operational amplifier U1. The first variable resistor VRtotal1 is connected between the inverting input terminal and the output terminal of the first operational amplifier U1. The controller 10 can adjust the resistance value of the first variable resistor VRtotal1.

[0065] As an optional implementation, please continue to refer to Figure 4 A feedback capacitor Ctotal may also be provided between the inverting input terminal and the output terminal of the first operational amplifier U1.

[0066] The first total resistor Rtotal1, the second total resistor Rtotal2, the first operational amplifier U1 and the first variable resistor VRtotal1 can form a common-phase amplifier, and the signal amplification factor of the common-phase amplifier is associated with the resistance values ​​of the two resistors connected to the inverting input terminal. For example, the calculation formula of the first amplification factor A1 of the first signal amplification circuit 21 can be:

[0067] A1=1+VRtotal / Rtotal1;

[0068] Wherein, VRtotal is the resistance value of the first variable resistor, and Rtotal1 is the resistance value of the first total resistor.

[0069] That is, the controller 10 can adjust the first amplification factor of the first signal amplifying circuit 21 by adjusting the resistance value of the first variable resistor VRtotal1 .

[0070] In some embodiments, the second signal amplifying circuit 22 includes a voltage follower.

[0071] Please continue to refer to Figure 4The voltage follower includes a second operational amplifier U2, the non-inverting input terminal of the second operational amplifier U2 is connected to the output terminal of the first operational amplifier U1, and the inverting input terminal of the second operational amplifier U2 is connected to the output terminal of the second operational amplifier U2. After the first operational amplifier U1 amplifies the first voltage signal by a first amplification factor, the voltage follower can isolate and output the amplified signal to achieve signal isolation between the first operational amplifier U1 and the back-end device and mutual isolation between each second signal amplification circuit 22.

[0072] The second signal amplifying circuit 22 may further include a first resistor, a second resistor, a third operational amplifier U3, a third resistor and a second variable resistor. Figure 4 As shown, among the n second signal amplifying circuits, the i-th second signal amplifying circuit includes a first resistor R(3i-2), a second resistor R(3i-1), a third resistor R3i, and a second variable resistor VRi.

[0073] The inverting input terminal of the third operational amplifier U3 is grounded through the first resistor, and the non-inverting input terminal of the third operational amplifier U3 is connected to the output terminal of the second operational amplifier U2 through the second resistor. The third resistor is connected between the non-inverting input terminal of the third operational amplifier U3 and the ground terminal. The second variable resistor is connected between the inverting input terminal and the output terminal of the third operational amplifier U3.

[0074] As an optional implementation, a feedback capacitor may also be provided between the inverting input terminal and the output terminal of the third operational amplifier U3, that is, the i-th second signal amplifying circuit further includes a feedback capacitor Ci.

[0075] The first resistor, the second resistor, the third operational amplifier U3, the third resistor and the second variable resistor can constitute a common-mode amplifier, and the second resistor and the third resistor can play a voltage-dividing role, and the primary amplified signal output by the first operational amplifier U1 is divided and input into the common-mode input terminal of the third operational amplifier U3. At this time, the signal amplification factor of the third operational amplifier U3 is associated with the first resistor and the second variable resistor. The controller 10 can adjust the second amplification factor of the second signal amplification circuit 22 by adjusting the resistance value of the second variable resistor.

[0076] It should be noted that after the second resistor and the third resistor divide the voltage, the signal input to the third operational amplifier U3 is the divided signal. At this time, the third operational amplifier U3 can amplify the divided voltage signal with a second amplification factor.

[0077] For each output terminal of the driving circuit 20 , after performing signal amplification twice by the first signal amplifying circuit 21 and the corresponding second signal amplifying circuit 22 , a corresponding driving signal voltage can be output.

[0078] In some embodiments, the first variable resistor VRtotal1 and the second variable resistor may be adjustable resistors or digital potentiometers. The controller 10 can adjust the resistance values ​​of the first variable resistor VRtotal1 and the n second variable resistors respectively through corresponding control signals.

[0079] It is understandable that the first variable resistor VRtotal1 and the second variable resistor may be resistors of the same type or resistors of different types. Similarly, any two second variable resistors may be resistors of the same type or resistors of different types.

[0080] Please refer to Figure 5 In some embodiments, the multi-channel selection circuit 30 includes n voltage followers and a multi-channel selection unit 31 .

[0081] Each of the n voltage followers may include a second operational amplifier U2, and the input end of the second operational amplifier U2 is electrically connected to the corresponding electrode port. The n input ends of the multi-way selection unit 31 are respectively connected to the output ends of the n second operational amplifiers U2. The output end of the multi-way selection unit 31 is connected to the signal acquisition module 40, and the control end of the multi-way selection unit 31 is connected to the controller 10.

[0082] The controller 10 can provide a coding signal and an enable signal to the multi-way selection unit 31. When the multi-way selection unit receives the enable signal, it can decode the received coding signal to obtain a corresponding selection signal. Based on the received selection signal, the multi-way selection unit 31 can connect one of the voltage followers with the signal acquisition module 40, thereby outputting the sampling signal of the corresponding electrode port to the signal acquisition module 40. For example, when the multi-way selection unit 31 connects port S2 with port S0, it is equivalent to outputting the electrode port SEG2 to the signal acquisition module 40 through the output terminal VG.

[0083] When the selection signal provided by the controller 10 is a traversal cycle signal of multiple input ports, the multi-channel selection unit 31 can output the sampling signals of each electrode port to the signal acquisition module 40 in sequence.

[0084] After the controller 10 obtains the sampling signals of each electrode port through the signal acquisition module 40, it can adjust the driving signal voltage outputted by the output terminal corresponding to the electrode port in the driving circuit 20 according to the sampling signals of each electrode port, and finally make the sampling signals of each electrode port consistent. At this time, it can be approximately considered that the voltage actually received by each strip electrode is the same, so that the display module can realize the display of a pure color picture.

[0085] It should be noted that the connection lines between the output end of the driving circuit 20 and the strip electrode include a first connection line Line1 between the output end of the driving circuit 20 and the electrode port and a second connection line Line2 between the electrode port and the strip electrode. Since the electrode port is a connection port integrated on the FPC, the n electrode ports also need to be connected to the strip electrode through different second connection lines. In the wiring design of each second connection line, the length of each second connection line is not completely consistent. For example Figure 6 As shown, taking the strip electrodes corresponding to the two electrode ports SEG1 and SEG2 as an example, there may be differences in the routing lengths of the two first connection lines Line1, and there may also be differences in the routing lengths of the two second connection lines Line2, resulting in different equivalent resistances of the first connection lines Line1 and the second connection lines Line2. Therefore, even if the drive signal voltage output by the drive circuit 20 is adjusted so that the sampling signals of each electrode port are consistent, it is only equivalent to the voltage shared by each strip electrode and the second connection line Line2 being consistent. When there are differences in the lengths of each second connection line Line2, there will also be differences in the equivalent resistances of each second connection line Line2, resulting in different voltages shared by each second connection line Line2. Therefore, in the above-mentioned embodiment, since there are differences in the lengths of the second connection lines Line2 connected to each strip electrode, the voltages actually received by each strip electrode will still be different after the drive circuit 20 adjusts each drive signal voltage.

[0086] In order to further solve the technical problem that after adjusting the driving signal voltage output by the driving circuit to each electrode port in the above embodiment, the voltages received by each strip electrode are still inconsistent, the embodiment of the present application further provides a grating compensation method.

[0087] Figure 7 A schematic flow chart of a grating compensation method provided by an embodiment of the present application is shown. The method may include the following steps:

[0088] S110, when the driving circuit provides a driving signal voltage to the n electrode ports, controlling the shooting module to shoot and obtain the display brightness of multiple sub-display areas; wherein the multiple sub-display areas are display areas corresponding to the multiple strip electrodes of the grating respectively;

[0089] S120, adjusting the driving signal voltages of the n output terminals of the driving circuit based on the display brightness of each sub-display area, so that the display brightness of each sub-display area matches the target brightness corresponding to the first gray scale;

[0090] S130, acquiring n first sampling signals respectively corresponding to the n electrode ports through a signal acquisition module;

[0091] S140, generating a first proportional relationship according to the voltage magnitudes of the n first sampling signals; wherein the first proportional relationship includes a voltage ratio between each of the first sampling signals;

[0092] S150, controlling the driving circuit to provide a driving signal voltage corresponding to a second grayscale to the n electrode ports; wherein the second grayscale is at least one grayscale within a target grayscale interval;

[0093] S160, obtaining a reference sampling signal corresponding to one of the electrode ports through a signal acquisition module;

[0094] S170, based on the first proportional relationship, adjusting the driving signal voltages of the remaining (n-1) output terminals of the driving circuit so that the voltage ratio of the second sampling signal corresponding to the remaining (n-1) electrode ports to the reference sampling signal satisfies the first proportional relationship.

[0095] In this embodiment, when the driving circuit provides a voltage signal to the n electrode ports, the display brightness of the sub-display area corresponding to each strip electrode can be photographed by the shooting module, and the output driving signal voltage can be adjusted based on the display brightness so that the display brightness of each sub-display area matches the target brightness of the first grayscale. At this time, the n first sampling signals sampled by the n electrode ports can be obtained, and the voltage ratio between each first sampling signal can be determined to generate a first proportional relationship. After the driving circuit is controlled to provide the driving signal voltage corresponding to the second grayscale to the n electrode ports, the driving signal voltage of the remaining (n-1) output terminals can be adjusted according to the reference sampling signal corresponding to one of the electrode ports, so that the voltage ratio of the second sampling signal of each electrode port to the reference sampling signal satisfies the first proportional relationship. When the voltage ratio of any two sampling signals satisfies the first proportional relationship, it can be determined that the two strip electrodes can receive the same voltage, so that the voltage actually received by each strip electrode is consistent, so as to realize the display of a pure color picture and improve the vertical stripe phenomenon under the pure color picture. Furthermore, when it is necessary to compensate for the display brightness of multiple grayscales, it is only necessary to use the shooting module to shoot during the compensation process of one grayscale, and the shooting process can be omitted during the compensation process of other grayscales, thereby greatly reducing the time that each display module occupies the shooting module during the compensation process, and improving the use efficiency of the shooting module and the overall compensation efficiency.

[0096] The following takes the compensation process of the display module displaying a pure color picture of the first grayscale as an example to introduce the specific implementation methods of the above steps.

[0097] In S110, the display module stores a preset driving signal voltage corresponding to the first grayscale, and the controller can control the driving circuit to provide the same preset driving signal voltage to the n electrode ports. At this time, due to the voltage division effect of the equivalent resistance of the connecting wiring, the actual voltages finally received by the n strip electrodes will be different, resulting in vertical stripes in the display module, and it is impossible to display a pure color picture.

[0098] At this time, the display area of ​​the display module can be photographed by the photographing module to obtain the display brightness of multiple sub-display areas. The multiple sub-display areas are display areas corresponding to the multiple strip electrodes of the grating.

[0099] It is understandable that each strip electrode can correspond to a column of liquid crystal pixels. When the same driving signal voltage is provided to the strip electrodes, the strip electrodes will sequentially provide the same voltage signal to the liquid crystal pixels in the same column due to the unchanged voltage division effect of the connecting wiring, so that the liquid crystal pixels in the same column maintain the same brightness. However, different strip electrodes will receive different voltage signals, which will cause brightness differences between the liquid crystal pixels in each column, that is, vertical stripes will occur.

[0100] In S120, after determining the display brightness of each sub-display area corresponding to each strip electrode, the driving signal voltage of the n output terminals of the driving circuit can be adjusted according to each display brightness to adjust the display brightness of each sub-display area, so as to finally match the display brightness of each sub-display area with the target brightness corresponding to the first gray scale.

[0101] In some embodiments, the above S120 may include:

[0102] Based on the display brightness of each sub-display area, a resistance adjustment instruction is sent to each second variable resistor of the driving circuit to adjust the second amplification factor of each second signal amplifying circuit.

[0103] In this embodiment, taking the display brightness adjustment process of a single sub-display area as an example, after the display brightness of the sub-display area is photographed by the shooting module, the strip electrode corresponding to the sub-display area can be determined, and the second signal amplification circuit connected to the electrode port corresponding to the strip electrode can be determined. The controller can adjust the resistance of the second variable resistor in the second signal amplification circuit by sending a resistance adjustment instruction to adjust the second amplification factor of the second signal amplification circuit. When the second amplification factor changes, the driving signal voltage output by the output terminal corresponding to the electrode port in the driving circuit will also change based on the change of the second amplification factor, so that the voltage actually received by the strip electrode increases or decreases, thereby changing the display brightness of the sub-display area.

[0104] For each sub-display area, the above method can be adopted to adjust the resistance of the second variable resistor in the second signal amplifying circuit corresponding to each strip electrode through the resistance adjustment instruction, so as to independently adjust the second amplification factor of each second signal amplifying circuit, thereby realizing the individual adjustment of the display brightness of each sub-display area.

[0105] In S130, after the display brightness of each sub-display area is adjusted so that the display brightness of each sub-display area matches the target brightness corresponding to the first grayscale, the signal acquisition module can acquire n first sampling signals corresponding to the n electrode ports.

[0106] Since the display brightness of each sub-display area is consistent, it can be considered that the voltage actually received by each strip electrode is consistent at this time, but since there is a second connection line between the strip electrode and the electrode port, and the second connection lines corresponding to each strip electrode are different, the voltage distributed on each second connection line is not completely consistent. At this time, the first sampling signal of each electrode port collected by the signal acquisition module is actually the sum of the voltage on the strip electrode and the voltage on the second connection line.

[0107] In some embodiments, the above S130 may include:

[0108] A selection signal is sent to a multi-way selection unit of the multi-channel selection circuit, so that the multi-way selection unit sequentially connects the n electrode ports to the signal acquisition module and sequentially acquires n first sampling signals.

[0109] In this embodiment, since the multi-channel selection unit can only connect one of the electrode ports to the signal acquisition module at any time, in order to obtain the sampling signal of each electrode port, the controller can send a selection signal to the multi-channel selection unit of the multi-channel selection circuit. The selection signal can drive the multi-channel selection unit to connect n electrode ports to the signal acquisition module in turn.

[0110] When the multi-channel selection unit connects each electrode port to the signal acquisition module, the controller can obtain the first sampling signal of the electrode port from the signal acquisition module. After the multi-channel selection unit connects all electrode ports to the signal acquisition module in turn, the controller can obtain n first sampling signals corresponding to the n electrode ports.

[0111] In S140, after acquiring n first sampling signals, a first proportional relationship may be generated according to the voltage magnitudes of the n first sampling signals. The first proportional relationship includes the voltage ratios between the first sampling signals.

[0112] In some embodiments, the above S140 may include:

[0113] S210, determining a reference sampling signal from n first sampling signals;

[0114] S220 , calculating voltage ratios of the remaining first sampling signals and the reference sampling signal to generate a first proportional relationship.

[0115] In S210 , after acquiring n first sampling signals, a reference sampling signal may be determined from the n first sampling signals.

[0116] In some embodiments, the above S210 may include:

[0117] A first sampling signal with a maximum voltage or a minimum voltage is selected from the n first sampling signals as a reference sampling signal.

[0118] In this embodiment, from among the n first sampling signals, the first sampling signal with the largest voltage may be selected as the reference sampling signal, or the first sampling signal with the smallest voltage may be selected as the reference sampling signal.

[0119] As another optional implementation, the reference sampling signal may also be the average value, median, mode or weighted average value of n first sampling signals, which is not limited here.

[0120] In S220 , after determining the reference sampling signal, voltage ratios of the remaining first sampling signals and the reference sampling signal may be calculated to generate a first proportional relationship.

[0121] It should be noted that, taking n first sampling signals as an example, if a first sampling signal is selected from the n first sampling signals as a reference sampling signal, it is necessary to calculate the voltage ratios of the remaining n-1 first sampling signals and the reference sampling signal. If the average, median, mode or weighted average of the n first sampling signals is used as the reference sampling signal, it is necessary to calculate the voltage ratios of the n first sampling signals and the reference sampling signal.

[0122] In S150, the controller may control the driving circuit to provide a voltage signal corresponding to a second gray scale to the n electrode ports. The second gray scale may be at least one gray scale within a target gray scale interval.

[0123] The voltage signal corresponding to the second grayscale is the preset driving signal voltage of the second grayscale. The controller can control the driving circuit to output the same preset driving signal voltage through the n output terminals. Obviously, although the preset driving signal voltage output by the n output terminals is the same, the voltage actually received by each strip electrode is different. When the display module displays the pure color picture of the second grayscale, vertical stripes will be generated.

[0124] In S160, the controller may obtain a reference sampling signal corresponding to one of the electrode ports through a signal acquisition module.

[0125] In some embodiments, the electrode port corresponding to the reference sampling signal is the reference electrode port; the above S160 may include:

[0126] A reference gating signal is sent to a multi-channel selection unit of the multi-channel selection circuit, so that the multi-channel selection unit connects the reference electrode port with the signal acquisition module to obtain a reference sampling signal.

[0127] In this embodiment, the controller can send a reference selection signal to the multi-way selection unit of the multi-channel selection circuit, so that the multi-way selection unit determines the reference electrode port from multiple electrode ports, and connects the input end and output end corresponding to the reference electrode port, so that the reference electrode port is connected to the signal acquisition module, and the controller can collect the reference sampling signal through the signal acquisition module.

[0128] In S170, after determining the reference sampling signal corresponding to one electrode port, the drive signal voltages of the remaining (n-1) output terminals in the drive circuit can be adjusted based on the first proportional relationship acquired in advance, so that the voltage ratio of the second sampling signal corresponding to the remaining (n-1) electrode ports to the reference sampling signal satisfies the first proportional relationship.

[0129] In some embodiments, the above S170 may include:

[0130] S310, sending a selection signal to a multi-channel selection unit of the multi-channel selection circuit, so that the multi-channel selection unit sequentially connects the remaining (n-1) electrode ports to the signal acquisition module;

[0131] S320, when each electrode port is connected to the signal acquisition module, adjust the driving signal voltage of the output terminal corresponding to the electrode port in the driving circuit so that the second voltage ratio of the second sampling signal corresponding to the electrode port to the reference sampling signal is consistent with the first voltage ratio corresponding to the electrode port; wherein the first voltage ratio corresponding to the electrode port is the voltage ratio of the first sampling signal corresponding to the electrode port to the reference sampling signal.

[0132] In S310, the controller may send a selection signal to the multi-channel selection unit of the multi-channel selection circuit, and the multi-channel selection unit may sequentially connect the remaining (n-1) electrode ports to the signal acquisition module according to the received selection signal.

[0133] In S320, when each electrode port is connected to the signal acquisition module, the controller can obtain the sampling signal of the electrode port. The controller can adjust the sampling signal of the electrode port by adjusting the driving signal voltage of the output end corresponding to the electrode port in the driving circuit. For example, when the controller increases the driving signal voltage of the output end, the sampling signal of the electrode port also increases; otherwise, the sampling signal of the electrode port decreases.

[0134] When adjusting the driving signal voltage of the output terminal corresponding to each electrode port in the driving circuit, the controller can perform feedback adjustment according to the sampling signal of the electrode port obtained in real time until the second voltage ratio of the sampling signal of the electrode port to the reference sampling signal is consistent with the first voltage ratio. The first voltage ratio is the voltage ratio of the first sampling signal corresponding to the electrode port to the reference sampling signal during the previous shooting module shooting calibration process.

[0135] When the second voltage ratio of the second sampling signal to the reference sampling signal corresponding to each electrode port is adjusted to be consistent with the first voltage ratio in sequence, it can be regarded that each strip electrode can receive the same voltage, thereby realizing the display of a pure color picture.

[0136] As an optional implementation, one reference electrode port and one common electrode port are used as an example for description below.

[0137] The driving circuit can output a driving signal voltage corresponding to the first gray scale to output terminals respectively corresponding to the two electrode ports.

[0138] Please refer to Figure 8 For the reference electrode port, the equivalent resistance of the corresponding strip electrode can be A1, the equivalent resistance of the second connecting wire between the strip electrode and the reference electrode port can be B1, and the signal voltage of the first sampling signal collected can be V1; for the common electrode port, the equivalent resistance of the corresponding strip electrode can be A2, the equivalent resistance of the second connecting wire between the strip electrode and the reference electrode port can be B2, and the signal voltage of the first sampling signal collected can be V2;

[0139] After adjusting the driving signal voltages corresponding to the two electrode ports respectively according to the display brightness captured by the camera module, the display brightness of the display areas corresponding to the two strip electrodes can be made consistent. At this time, the voltages divided by the two strip electrodes can be considered equal, so:

[0140] V1*A1 / (A1+B1)=V2*A2 / (A2+B2);

[0141] Among them, V1 is the total voltage between the strip electrode and the second connecting trace, A1 / (A1+B1) is the ratio of the equivalent resistance of the strip electrode to the total resistance, and the product of V1 and A1 / (A1+B1) is the voltage shared by the strip electrode of the reference electrode port; similarly, the product of V2 and A2 / (A2+B2) is the voltage shared by the strip electrode of the common electrode port.

[0142] Taking the first sampling signal of the reference electrode port as the reference sampling signal, the first voltage ratio between the common electrode port and the reference electrode port is V2 / V1, and we can get:

[0143] V2 / V1=(A1 / (A1+B1)) / (A2 / (A2+B2));

[0144] After obtaining the first voltage ratio of the two first sampling signals, the controller can control each output terminal of the driving circuit to output a voltage signal corresponding to the second grayscale. At this time, the reference sampling signal of the reference electrode port can be obtained as Va, and the voltage received by the strip electrode of the reference electrode port is:

[0145] Va*A1 / (A1+B1);

[0146] After adjusting the driving signal voltage output to the common electrode port based on the reference sampling signal Va, the voltage ratio of the second sampling signal Vb collected by the common electrode port to the reference sampling signal Va can satisfy V2 / V1, that is:

[0147] Vb / Va=V2 / V1;

[0148] At this time, Vb = Va*(V2 / V1);

[0149] Since the equivalent resistance A2 of the strip electrode corresponding to the common electrode port and the equivalent resistance B2 of the second connection line between the strip electrode and the electrode port have not changed, the voltage actually received by the strip electrode of the common electrode port is:

[0150] Vb*(A2 / A2+B2);

[0151] Substituting the above Vb=Va*(V2 / V1) and V2 / V1=(A1 / (A1+B1)) / (A2 / (A2+B2)) into the equation, we can obtain:

[0152] Vb*(A2 / A2+B2)

[0153] =Va*(V2 / V1)*(A2 / (A2+B2))

[0154] =Va*(A1 / (A1+B1)) / (A2 / (A2+B2))*(A2 / (A2+B2))

[0155] =Va*(A1 / (A1+B1));

[0156] At this time, the voltage actually received by the strip electrode of the reference electrode port is consistent with the voltage actually received by the strip electrode of the common electrode port, which can be approximated that the display brightness of the display sub-areas corresponding to the two strip electrodes is consistent.

[0157] Similarly, when the display module includes multiple strip electrodes, the voltage actually received by the strip electrodes of each electrode port can be adjusted to be consistent with the voltage actually received by the strip electrodes of the reference electrode port through the above method, so that the brightness of each display sub-area under the second grayscale can be kept consistent, improving the vertical stripe phenomenon under the pure color screen. In addition, in the above embodiment, when it is necessary to compensate the display brightness of multiple grayscales, it is only necessary to use the shooting module to shoot during the compensation process of one grayscale, and the shooting process can be omitted during the compensation process of other grayscales, thereby greatly reducing the time that each display module occupies the shooting module during the compensation process, and improving the use efficiency of the shooting module and the overall compensation efficiency.

[0158] The present application also provides a display module, please refer to Fig. 9 The display module may include the grating compensation driving circuit provided in the above-mentioned embodiment of the present application.

[0159] Please refer to Fig.10 In some embodiments, the display module may include at least two grating compensation driving circuits 100 . The grating compensation driving circuit 100 may also include an external communication interface 50 .

[0160] The external communication interface 50 may be connected to the controller 10 . When there are multiple grating compensation driving circuits 100 , the external communication interface 50 may be cascade-connected to the external communication interfaces 50 of other grating compensation driving circuits 100 .

[0161] The host computer can be connected to one of the multiple grating compensation driving circuits 100, and the remaining grating compensation driving circuits 100 can be connected to the host computer through the cascaded grating compensation driving circuits 100. Under the control of the host computer, the controller 10 of each grating compensation driving circuit 100 can adjust the driving signal voltage output by the driving circuit 20 to each electrode port, so that the brightness of the corresponding grating module at the same gray scale remains consistent. When multiple grating compensation driving circuits 100 are cascaded, the brightness of multiple grating modules at the same gray scale can be kept consistent, and the pure color screen display of multiple grating modules can be achieved.

[0162] An embodiment of the present application also provides an electronic device, which may be a PC, a television, a display, a mobile terminal, a tablet computer, a wearable device, etc. The electronic device may include the display module provided in the embodiment of the present application.

[0163] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0164] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0165] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the methods and core ideas of this application. The above are only preferred implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concepts and technical solutions of this application to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A grating compensation driving circuit, characterized in that: Applied to display modules, including: Controller; A driving circuit, wherein the input end of the driving circuit is connected to the controller, and the n output ends of the driving circuit are respectively connected to the n electrode ports of the grating module; wherein the electrode ports are electrically connected to the corresponding n strip electrodes; and the driving circuit is used to output a corresponding driving signal voltage according to the instruction signal provided by the controller; A multi-channel selection circuit, wherein n input terminals of the multi-channel selection circuit are respectively connected to corresponding n electrode ports; the multi-channel selection circuit is used to output sampling signals of each electrode port in sequence; A signal acquisition module, wherein an input end of the signal acquisition module is connected to an output end of the multi-channel selection circuit, and an output end of the signal acquisition module is connected to the controller; The controller is used to adjust the driving signal voltage output by the driving circuit to each electrode port according to the acquired sampling signal of each electrode port.

2. The grating compensation driving circuit according to claim 1, characterized in that: The driving circuit comprises: a first signal amplifying circuit, wherein an input end of the first signal amplifying circuit is connected to the controller; n second signal amplifying circuits, wherein the input end of the second signal amplifying circuit is connected to the output end of the first signal amplifying circuit, and the output end of the second signal amplifying circuit is connected to the corresponding electrode port; The controller is used to provide a first voltage signal to the first signal amplifying circuit, and to adjust the signal amplification factors of the first signal amplifying circuit and the n second signal amplifying circuits respectively.

3. The grating compensation driving circuit according to claim 2, characterized in that: The first signal amplifying circuit comprises: first total resistance; Second total resistance; a first operational amplifier, wherein an inverting input terminal of the first operational amplifier is grounded through the first total resistor, and a non-inverting input terminal of the first operational amplifier is connected to the controller through the second total resistor; A first variable resistor, the first variable resistor is connected between the inverting input terminal and the output terminal of the first operational amplifier; The controller is used to adjust the resistance value of the first variable resistor to adjust the first amplification factor of the first signal amplifying circuit.

4. The grating compensation driving circuit according to claim 3, characterized in that: The second signal amplifying circuit comprises: A voltage follower, comprising a second operational amplifier, wherein a non-inverting input terminal of the second operational amplifier is connected to an output terminal of the first operational amplifier, and an inverting input terminal of the second operational amplifier is connected to an output terminal of the second operational amplifier; a first resistor; A second resistor; a third operational amplifier, wherein an inverting input terminal of the third operational amplifier is grounded through the first resistor, and a non-inverting input terminal of the third operational amplifier is connected to an output terminal of the second operational amplifier through the second resistor; A third resistor, the third resistor is connected between the non-inverting input terminal of the third operational amplifier and the ground terminal; a second variable resistor connected between an inverting input terminal and an output terminal of the third operational amplifier; The controller is used to adjust the resistance value of the second variable resistor to adjust the second amplification factor of the second signal amplifying circuit.

5. The grating compensation driving circuit according to claim 4, characterized in that: The first variable resistor and the second variable resistor are adjustable resistors or digital potentiometers.

6. The grating compensation driving circuit according to claim 1, characterized in that: The multi-channel selection circuit comprises: n voltage followers, wherein input terminals of the voltage followers are electrically connected to corresponding electrode ports; A multi-way selection unit, wherein n input terminals of the multi-way selection unit are respectively connected to the output terminals of the n voltage followers, the output terminal of the multi-way selection unit is connected to the signal acquisition module, and the control terminal of the multi-way selection unit is connected to the controller; The controller is also used to provide a selection signal to the multi-way selection unit.

7. A grating compensation method, characterized in that: The grating compensation driving circuit applied to any one of claims 1 to 6, the method comprising: When the driving circuit provides driving signal voltages to the n electrode ports, the camera module is controlled to capture and obtain the display brightness of multiple sub-display areas; wherein the multiple sub-display areas are display areas corresponding to the multiple strip electrodes of the grating respectively; adjusting the driving signal voltages of the n output terminals of the driving circuit based on the display brightness of each sub-display area so that the display brightness of each sub-display area matches the target brightness corresponding to the first gray scale; Acquire n first sampling signals corresponding to n electrode ports respectively through a signal acquisition module; Generate a first proportional relationship according to the voltage magnitudes of the n first sampling signals; wherein the first proportional relationship includes the voltage ratio between the first sampling signals; Controlling the driving circuit to provide a driving signal voltage corresponding to a second grayscale to the n electrode ports; wherein the second grayscale is at least one grayscale within a target grayscale interval; Obtain a reference sampling signal corresponding to one of the electrode ports through a signal acquisition module; Based on the first proportional relationship, the driving signal voltages of the remaining (n-1) output terminals of the driving circuit are adjusted so that the voltage ratio of the second sampling signals corresponding to the remaining (n-1) electrode ports to the reference sampling signal satisfies the first proportional relationship.

8. The grating compensation method according to claim 7, characterized in that: The step of adjusting the driving signal voltages of n output terminals of the driving circuit based on the display brightness of each sub-display area includes: Based on the display brightness of each sub-display area, a resistance adjustment instruction is sent to each second variable resistor of the driving circuit to adjust the second amplification factor of each second signal amplifying circuit.

9. The grating compensation method according to claim 7, characterized in that: The method of acquiring n first sampling signals respectively corresponding to the n electrode ports through the signal acquisition module includes: A selection signal is sent to a multi-way selection unit of a multi-channel selection circuit, so that the multi-way selection unit sequentially connects the n electrode ports to the signal acquisition module and sequentially acquires n first sampling signals.

10. The grating compensation method according to claim 7, characterized in that: The step of generating a first proportional relationship according to the voltage magnitudes of the n first sampling signals comprises: Determine a reference sampling signal from the n first sampling signals; The voltage ratios of the remaining first sampling signals and the reference sampling signal are calculated to generate a first proportional relationship.

11. The grating compensation method according to claim 10, characterized in that: The step of determining a reference sampling signal from the n first sampling signals comprises: A first sampling signal with a maximum voltage or a minimum voltage is selected from the n first sampling signals as a reference sampling signal.

12. The grating compensation method according to claim 10, characterized in that: The electrode port corresponding to the reference sampling signal is the reference electrode port; The step of obtaining a reference sampling signal corresponding to one of the electrode ports through a signal acquisition module includes: A reference gating signal is sent to a multi-channel selection unit of a multi-channel selection circuit, so that the multi-channel selection unit connects the reference electrode port with the signal acquisition module to obtain a reference sampling signal.

13. The grating compensation method according to claim 12, characterized in that: The step of adjusting the driving signal voltages of the remaining (n-1) output terminals of the driving circuit based on the first proportional relationship includes: Sending a selection signal to a multi-way selection unit of a multi-channel selection circuit, so that the multi-way selection unit sequentially connects the remaining (n-1) electrode ports to the signal acquisition module; When each electrode port is connected to the signal acquisition module, the driving signal voltage of the output end corresponding to the electrode port in the driving circuit is adjusted so that the second voltage ratio of the second sampling signal corresponding to the electrode port and the reference sampling signal is consistent with the first voltage ratio corresponding to the electrode port; wherein the first voltage ratio corresponding to the electrode port is the voltage ratio of the first sampling signal corresponding to the electrode port to the reference sampling signal.

14. A display module, characterized in that: The invention comprises the grating compensation driving circuit according to any one of claims 1 to 6.

15. The display module according to claim 14, characterized in that: The display module includes at least two grating compensation driving circuits; the grating compensation driving circuit also includes: An external communication interface, the external communication interface is connected to the controller, and the external communication interface is used to be cascade-connected with the external communication interface of other grating compensation drive circuits; wherein, When the grating compensation driving circuit is connected to a host computer or is connected to a host computer through a cascaded grating compensation driving circuit, the controller is used to adjust the driving signal voltage output by the driving circuit to each electrode port so that the brightness of each grating module remains consistent at the same grayscale.

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