Display driving method, display driving circuit and display device

Abstract

The invention discloses a display driving method, a display driving circuit and a display device.The display driving method comprises the steps that whether a display area of a bistable liquid crystal display panel is pressed or not is detected, and when it is detected that the display area is pressed, a pressing signal is generated, and controlling the bistable liquid crystal display panel to refresh a current display picture according to the pressing signal. Therefore, the display picture can be updated when the bistable liquid crystal display panel is pressed, the influence of pressing traces on the display effect is effectively improved, and the use experience of a user is improved.

Description

Technical Field

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

[0002] Bistable liquid crystal display technology enables liquid crystal molecules to switch between two stable physical states, maintaining this stable state even without an applied electric field. Because bistable liquid crystal displays only consume energy when switching between states and require almost no additional power to maintain the display state, they significantly reduce power consumption compared to traditional liquid crystal display technology. Therefore, bistable liquid crystal displays combine the low power consumption of electronic paper with the color display effects that electronic paper lacks, offering broad application prospects in areas such as e-book readers, smart tags, and outdoor advertising.

[0003] However, the structure of bistable LCDs is relatively sensitive. When pressed, the arrangement of the liquid crystal molecules is forcibly altered, causing changes in their optical properties and resulting in dark or discolored spots. Even after the pressure is removed, the liquid crystal molecules may not immediately return to their original arrangement, so the pressure mark will temporarily remain on the screen, seriously affecting the display quality of the bistable LCD.

[0004] Therefore, it is necessary to provide an improved technical solution to overcome the above technical problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present application is to provide a display driving method, a display driving circuit and a display device, which can effectively improve the influence of pressing marks on the display effect and solve the problem that the bistable liquid crystal display screen cannot be touched.

[0006] To achieve the above objectives: In a first aspect, an embodiment of the present application provides a display driving method, the method comprising: detecting whether a display area of the bistable liquid crystal display panel is pressed; When it is detected that the display area is pressed, generating a pressing signal; According to the pressing signal, the bistable liquid crystal display panel is controlled to refresh the current display image.

[0007] In one embodiment, the display area includes a plurality of sensing electrodes, and detecting whether the display area of the bistable liquid crystal display panel is pressed includes: Obtaining a reference capacitance value and a real-time capacitance value corresponding to each sensing electrode in the display area; Calculating a capacitance difference between the real-time capacitance value corresponding to each sensing electrode and a reference capacitance value, and comparing the capacitance difference value corresponding to each sensing electrode with a preset capacitance difference threshold; When the capacitance difference corresponding to the sensing electrode is greater than or equal to the capacitance difference threshold, it is determined that the display area is pressed.

[0008] In one embodiment, the display area includes a sensing node formed by a plurality of sensing electrodes intersecting each other, and detecting whether the display area of the bistable liquid crystal display panel is pressed includes: Obtaining a reference capacitance value and a real-time capacitance value of each sensing node in the display area; Calculating a capacitance difference between a real-time capacitance value of each sensing node and a reference capacitance value, and comparing the capacitance difference of each sensing node with a preset capacitance difference threshold; Determining a sensing node whose capacitance difference is greater than the capacitance difference threshold as a pressed node; determining a pressed area within the display area according to a position of the pressed node within the display area; When the pressed area is greater than a preset area threshold, it is determined that the display area is pressed.

[0009] In one embodiment, obtaining a reference capacitance value corresponding to each sensing electrode in the display area includes: When the display area is not pressed, an average capacitance value corresponding to each sensing electrode within a preset time period is obtained, and the average capacitance value is used as a reference capacitance value corresponding to each sensing electrode.

[0010] In one embodiment, obtaining a reference capacitance value of each sensing node in the display area includes: When the display area is not pressed, an average capacitance value of each sensing node within a preset time period is obtained, and the average capacitance value is used as a reference capacitance value of each sensing node.

[0011] In a second aspect, an embodiment of the present application provides a display driving circuit for implementing the display driving method described in the above embodiment, wherein the display driving circuit includes a touch sensor and a timing controller; wherein, The touch sensor is used to detect whether the display area of the bistable liquid crystal display panel is pressed, and when it is detected that the display area is pressed, a pressing signal is generated; The timing controller is in communication with the touch sensor and is configured to control the bistable liquid crystal display panel to refresh a current display image according to the pressing signal.

[0012] In one embodiment, the display driving circuit further includes a common voltage generating circuit and a source driver communicatively connected to the timing controller; The timing controller is also used to generate a common voltage control signal and a source control signal; The common voltage generating circuit is used to output a common voltage signal to the common electrode of the bistable liquid crystal display panel according to the common voltage control signal; The source driver is used to output a source driving signal to the pixel electrode of the bistable liquid crystal display panel according to the source control signal.

[0013] In a third aspect, an embodiment of the present application provides a display device, comprising a bistable liquid crystal display panel for displaying an image, and a display driving circuit as described in the above embodiment; The bistable liquid crystal display panel includes a sensing electrode layer, an upper substrate, a lower substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate; The upper substrate is provided with a common electrode on a side close to the liquid crystal layer, and the lower substrate is provided with a pixel electrode on a side close to the liquid crystal layer.

[0014] In one embodiment, the sensing electrode layer is a self-capacitive structure and is disposed between the lower substrate and the liquid crystal layer.

[0015] In one embodiment, the sensing electrode layer is a mutual capacitance structure and is disposed on a side of the upper substrate away from the liquid crystal layer.

[0016] The display driving method, display driving circuit, and display device provided in the embodiments of the present application detect whether the display area of the bistable liquid crystal display panel is pressed, generate a pressing signal when the display area is detected to be pressed, and control the bistable liquid crystal display panel to refresh the current display screen according to the pressing signal. In this way, the display screen can be updated when the bistable liquid crystal display panel is pressed, effectively improving the impact of pressing marks on the display effect and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flowchart of a display driving method provided in one embodiment of the present application is shown.

[0019] Figure 2 A schematic flow chart of a pressure detection process provided in one embodiment of the present application.

[0020] Figure 3 A schematic flow chart of a pressure detection process provided in another embodiment of the present application.

[0021] Figure 4 A schematic diagram of the distribution of capacitance differences in a pressed state provided by an embodiment of the present application.

[0022] Figure 5 This is a structural block diagram of a display driving circuit provided in one embodiment of the present application.

[0023] Figure 6 A schematic structural diagram of a bistable liquid crystal display panel provided in one embodiment of the present application.

[0024] Figure 7 This is a structural schematic diagram of a bistable liquid crystal display panel provided in another embodiment of the present application. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0026] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0027] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the term "if" as used herein may be interpreted as "at the time of," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the described features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" as used herein are to be interpreted as inclusive, meaning any one or any combination. Thus, “A, B, or C” or “A, B, and / or C” means “any of: A; B; C; A and B; A and C; B and C; A, B, and C.” An exception to this definition occurs only when a combination of elements, functions, steps, or operations are inherently mutually exclusive in some manner.

[0028] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0029] It should be noted that in this article, step codes such as S101 and S102 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the order. When implementing the step, those skilled in the art may execute S102 first and then S101, etc., but these should all be within the scope of protection of this application.

[0030] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0031] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0032] Figure 1 This is a flow chart of a display driving method provided in one embodiment of the present application. Figure 1 As shown, the display driving method provided in the embodiment of the present application includes the following steps: Step S100 : detecting whether the display area of the bistable liquid crystal display panel is pressed.

[0033] Specifically, the bistable liquid crystal display panel in the embodiment of the present application is provided with a sensing electrode layer that covers the entire display area. The sensing electrode layer can be a self-capacitive structure or a mutual-capacitive structure. The sensing electrode layer of the self-capacitive structure determines whether it is pressed by detecting the change in capacitance of a single electrode to the ground (i.e., between the electrode and the ground plane). The sensing electrode layer of the mutual-capacitive structure generally includes two layers of electrodes, one layer is a driving electrode (Tx) in the X-axis direction, and the other layer is a receiving electrode (Rx) in the Y-axis direction. The two groups of electrodes form a mutual capacitance at the intersection, and whether it is pressed is determined by detecting the capacitance change at each intersection.

[0034] In one embodiment of the present application, when the sensing electrode layer is a self-capacitive structure, the display area includes a plurality of sensing electrodes. Figure 2 As shown, the detecting whether the display area of the bistable liquid crystal display panel is pressed specifically includes: Step S111: obtaining a reference capacitance value and a real-time capacitance value corresponding to each sensing electrode in the display area.

[0035] Specifically, when the display area is not pressed, an average capacitance value corresponding to each sensing electrode within a preset time period is obtained, and the average capacitance value is used as a reference capacitance value corresponding to each sensing electrode.

[0036] For example, when the display area is in a non-pressed state, the touch sensor connected to the sensing electrode can periodically obtain the real-time capacitance value of each sensing electrode to the ground during the sampling period. The real-time capacitance value is usually represented by an analog signal, and the continuous real-time capacitance value needs to be converted into a discrete digitized real-time capacitance value Rawdata (ADC) through an analog-to-digital converter (ADC). During each sampling period, the real-time capacitance value of each sensing electrode is sampled multiple times to obtain multiple capacitance sampling values, and the capacitance sampling values are averaged, and the calculated capacitance average value is used as the baseline capacitance value Baseline of the sensing electrode. Since changes in the environment may also affect the capacitance value of the sensing electrode, the baseline capacitance value can be updated regularly, that is, the touch sensor recalculates and updates the baseline capacitance value every once in a while.

[0037] Step S112: calculating a capacitance difference between the real-time capacitance value corresponding to each sensing electrode and a reference capacitance value, and comparing the capacitance difference value corresponding to each sensing electrode with a preset capacitance difference threshold.

[0038] Step S113: When the capacitance difference corresponding to the sensing electrode is greater than or equal to the capacitance difference threshold, it is determined that the display area is pressed.

[0039] Specifically, the touch sensor monitors the capacitance value of each sensing electrode to the ground in real time, that is, the real-time capacitance value Rawdata (ADC). When the display area is pressed by external force, the capacitance value of the sensing electrode corresponding to the pressed area to the ground will change, so the capacitance difference between the real-time capacitance value and the baseline capacitance value will also change. By calculating the capacitance difference, that is, Delta = Rawdata (ADC) - Baseline, and comparing the capacitance difference Delta with the preset capacitance difference threshold, when the capacitance difference Delta is greater than or equal to the capacitance difference threshold, it can be determined that the display area is pressed; when the capacitance difference Delta is less than the capacitance difference threshold, it is determined that the display area is not pressed, that is, the capacitance change of the sensing electrode may be caused by other environmental factors, etc., and will not affect the display effect.

[0040] In another embodiment of the present application, when the sensing electrode layer is a mutual capacitance structure, the display area includes sensing nodes formed by the intersection of multiple sensing electrodes. Figure 3 As shown, the detecting whether the display area of the bistable liquid crystal display panel is pressed specifically includes: Step S121: obtaining a reference capacitance value and a real-time capacitance value of each sensing node in the display area.

[0041] Specifically, when the display area is not pressed, the average capacitance of each sensing node over a preset time period is obtained and used as the reference capacitance value for each sensing node. A sensing node is the intersection of a drive electrode and a receiving electrode in the sensing electrode layer. By scanning each drive electrode and each receiving electrode, the capacitance value at each sensing node can be obtained.

[0042] Step S122: calculating the capacitance difference between the real-time capacitance value of each sensing node and the reference capacitance value, and comparing the capacitance difference of each sensing node with a preset capacitance difference threshold.

[0043] Step S123: determining the sensing node whose capacitance difference is greater than the capacitance difference threshold as a pressed node.

[0044] Step S124: Determine the pressed area in the display area according to the position of the pressed node in the display area.

[0045] Step S125: When the pressed area is greater than a preset area threshold, it is determined that the display area is pressed.

[0046] For example, Figure 4 This is a schematic diagram of the distribution of capacitance differences in a pressed state provided by an embodiment of the present application. Figure 4 As shown in the gray area in the figure, when pressed, the calculated capacitance difference of the sensing nodes corresponding to the gray areas is significantly larger. Based on the sensing nodes corresponding to these capacitance differences exceeding the capacitance difference threshold, the corresponding pressed area can be determined within the display area. To avoid false detection caused by environmental interference or other uncertainties, the calculated pressed area can be compared with a preset area threshold. If the pressed area exceeds the preset area threshold, it is determined that the display area is pressed, which will affect the display effect.

[0047] Step S200: When it is detected that the display area is pressed, a press signal is generated.

[0048] Step S300: According to the pressing signal, the bistable liquid crystal display panel is controlled to refresh the current display image.

[0049] Specifically, when the touch sensor detects a pressure on the display area through the sensing electrode layer, it sends a pressure signal to the display device's timing controller. Upon receiving the pressure signal, the timing controller generates a corresponding timing control signal to control the rearrangement of the liquid crystal molecules in the display panel, updating the displayed image. It should be noted that when the display panel is triggered to perform a refresh operation based on the pressure signal, the refresh can be performed on the entire screen or only on the area where the pressure was applied. This partial refresh can reduce refresh time and power consumption.

[0050] The display driving method provided in the embodiment of the present application detects whether the display area of the bistable liquid crystal display panel is pressed, generates a pressing signal when it detects that the display area is pressed, and controls the bistable liquid crystal display panel to refresh the current display screen according to the pressing signal. In this way, the display screen can be updated when the bistable liquid crystal display panel is pressed, effectively improving the impact of pressing marks on the display effect and improving the user experience.

[0051] Figure 5 This is a structural block diagram of a display driving circuit provided by an embodiment of the present application. Figure 5 As shown, the display driving circuit provided in the embodiment of the present application is used to implement the display driving method described in the above embodiment, and the display driving circuit includes a touch sensor 210 and a timing controller 220.

[0052] The touch sensor 210 is used to detect whether the display area of the bistable liquid crystal display panel is pressed. When the display area is pressed, it generates a press signal. The timing controller 220 is in communication with the touch sensor 210 and is used to control the bistable liquid crystal display panel to refresh the current display screen based on the press signal.

[0053] In this embodiment, the display driver circuit further includes a common voltage generating circuit 230 and a source driver 240 that are communicatively connected to the timing controller 220. Specifically, the timing controller 220 is further configured to generate a common voltage control signal and a source control signal. The common voltage control signal may include an output enable signal (OE) or a line synchronization signal (STV). The source control signal may include a source transition signal (STL), an output enable signal (OE), a line enable signal (LE), a clock signal (CLK), and a data signal (Data). The common voltage generating circuit 230 includes a control module 231, a digital-to-analog converter 232 and a voltage amplifier 233; the control module 231 is communicated with the timing controller 220, and is used to generate common voltage output data according to the common voltage control signal; the digital-to-analog converter 232 is communicated with the control module 231, and is used to generate a common voltage initial signal according to the common voltage output data; the voltage amplifier 233 is connected to the digital-to-analog converter 232, and is used to bias and amplify the common voltage initial signal to generate a common voltage signal.

[0054] In this embodiment, the common voltage generation circuit 230 generates a common voltage signal based on a common voltage control signal and outputs it to the common electrode of the bistable liquid crystal display panel. The source driver 240 outputs a source drive signal to the pixel electrodes of the bistable liquid crystal display panel based on the source control signal. Upon detecting a pressure signal, the electric field applied by the common electrode and the pixel electrode changes the orientation of the liquid crystal molecules in the liquid crystal display panel, thereby controlling the bistable liquid crystal display panel to refresh the current display image.

[0055] In this embodiment, the display drive circuit also includes a gate driver 250 and a power converter 260 that are communicatively connected to the timing controller 220. Specifically, the timing controller 220 is also used to generate a gate control signal, which may include a line synchronization signal (STV, Start of Vertical Signal), a gate clock signal (GCLK, Gate ClockSignal) and an operating mode signal (Mode). The gate driver 250 outputs a gate drive signal to the gate line of the bistable liquid crystal display panel according to the gate control signal. When the bistable liquid crystal display panel refreshes the current display screen, the gate driver 250 selects each row of pixel units to be refreshed in the display area in a row-by-row scanning manner according to the gate drive signal and reactivates them, so that the source driver 240 accurately rewrites the image data into the activated pixel units according to the source drive signal, thereby realizing row-by-row update of the display screen. The power converter 260 performs step-up or step-down conversion on the input power voltage to provide the required operating voltage for the touch sensor 210 , the timing controller 220 , the common voltage generating circuit 230 , the source driver 240 and the gate driver 250 .

[0056] Based on the same inventive concept as the aforementioned embodiments, an embodiment of the present application further provides a display device, which includes a bistable liquid crystal display panel for displaying images, and a display driving circuit as described in the aforementioned embodiments.

[0057] like Figure 6 and Figure 7As shown, the bistable liquid crystal display panel includes a sensing electrode layer 310, an upper substrate 320, a lower substrate 330, and a liquid crystal layer 340 disposed between the upper substrate 320 and the lower substrate 330. The liquid crystal layer 340 may include bistable liquid crystals. A common electrode 350 is disposed on the side of the upper substrate 320 proximate to the liquid crystal layer 340, and a pixel electrode 360 is disposed on the side of the lower substrate 330 proximate to the liquid crystal layer 340. A source drive signal is applied to the pixel electrode 360, and a common voltage signal is applied to the common electrode 350. When refreshing the image, the electric field generated by the pixel electrode 360 and the common electrode 350 controls the rearrangement of the liquid crystal molecules in the liquid crystal layer, thereby updating the current display image in the bistable liquid crystal display panel, eliminating pressure marks, and reducing the visual impact of pressure marks.

[0058] In one embodiment of the present application, the bistable liquid crystal is, for example, a cholesteric liquid crystal molecule. Cholesteric liquid crystal molecules have three textures: the P state (planar, reflective), the FC state (focal conic, foggy), and the H state (transparent). Both the FC state (focal conic, foggy) and the H state (transparent) are light-transmitting. In the P state, the reflection spectrum of the cholesteric liquid crystal is within the visible spectrum, and the cholesteric liquid crystal reflects bright colored light. The specific reflected color can be set based on the pitch of the cholesteric liquid crystal. Under a certain electric field, these three states can transition between each other. The P state (planar, reflective) and the FC state (focal conic, foggy) are stable textures that do not require voltage to maintain, while the H state (transparent) does. The display device of this embodiment can meet image display requirements while having a low refresh rate and lowering power consumption.

[0059] In one embodiment of the present application, Figure 6 As shown, when the sensing electrode layer 310 has a self-capacitive structure, it is disposed between the lower substrate 330 and the liquid crystal layer 340. This means that the sensing electrode layer 310 is integrated into the interior of the bistable liquid crystal display panel, forming an in-cell structure. A self-capacitive sensing electrode layer typically has only one sensing electrode layer, consisting of a continuous set of conductive strips or a grid. Each conductive strip or grid line acts as a separate electrode, forming a capacitor with ground. The pressed position is determined by detecting the change in capacitance between each electrode and ground.

[0060] In another embodiment of the present application, Figure 7As shown, when the sensing electrode layer 310 has a mutual capacitance structure, it is disposed on the side of the upper substrate 320 away from the liquid crystal layer 340. This means that the sensing electrode layer 310 is integrated into the outer layer of the bistable liquid crystal display panel, forming an on-cell structure. A mutual capacitance sensing electrode layer typically includes two layers of sensing electrodes: one layer for driving electrodes (Tx) in the X-axis direction, and the other for receiving electrodes (Rx) in the Y-axis direction. These two groups of electrodes form an intersecting electrode network in the display area. Each intersection forms a capacitive cell, and the pressed position is determined by detecting the capacitance change at each intersection.

[0061] The sensing electrode layer 310 in the embodiment of the present application needs to be connected to the touch sensor 210 in the display driving circuit to transmit the detected capacitance change signal so that the touch sensor 210 can determine whether the display area is pressed based on the capacitance change signal.

[0062] It should be noted that the detailed functional implementation of each of the above modules can be found in the description of the aforementioned method embodiment and circuit embodiment, and will not be repeated here. The display driving method described above is implemented by the cooperation between the modules provided by the above-mentioned bistable liquid crystal display panel and display driving circuit, and has the same beneficial effects as those described above.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0065] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A display driving method, characterized in that: The method comprises: detecting whether a display area of the bistable liquid crystal display panel is pressed; When it is detected that the display area is pressed, generating a pressing signal; According to the pressing signal, the bistable liquid crystal display panel is controlled to refresh the current display image.

2. The display driving method according to claim 1, wherein: The display area includes a plurality of sensing electrodes, and detecting whether the display area of the bistable liquid crystal display panel is pressed includes: Obtaining a reference capacitance value and a real-time capacitance value corresponding to each sensing electrode in the display area; Calculating a capacitance difference between the real-time capacitance value corresponding to each sensing electrode and a reference capacitance value, and comparing the capacitance difference value corresponding to each sensing electrode with a preset capacitance difference threshold; When the capacitance difference corresponding to the sensing electrode is greater than or equal to the capacitance difference threshold, it is determined that the display area is pressed.

3. The display driving method according to claim 1, wherein: The display area includes a sensing node formed by a plurality of sensing electrodes intersecting each other, and detecting whether the display area of the bistable liquid crystal display panel is pressed includes: Obtaining a reference capacitance value and a real-time capacitance value of each sensing node in the display area; Calculating a capacitance difference between a real-time capacitance value of each sensing node and a reference capacitance value, and comparing the capacitance difference of each sensing node with a preset capacitance difference threshold; Determining a sensing node whose capacitance difference is greater than the capacitance difference threshold as a pressed node; determining a pressed area within the display area according to a position of the pressed node within the display area; When the pressed area is greater than a preset area threshold, it is determined that the display area is pressed.

4. The display driving method according to claim 2, wherein: The obtaining of a reference capacitance value corresponding to each sensing electrode in the display area includes: When the display area is not pressed, an average capacitance value corresponding to each sensing electrode within a preset time period is obtained, and the average capacitance value is used as a reference capacitance value corresponding to each sensing electrode.

5. The display driving method according to claim 3, wherein: The obtaining of a reference capacitance value of each sensing node in the display area includes: When the display area is not pressed, an average capacitance value of each sensing node within a preset time period is obtained, and the average capacitance value is used as a reference capacitance value of each sensing node.

6. A display driving circuit, characterized in that: Used to implement the display driving method according to any one of claims 1 to 5, the display driving circuit includes a touch sensor and a timing controller; wherein, The touch sensor is used to detect whether the display area of the bistable liquid crystal display panel is pressed, and when it is detected that the display area is pressed, a pressing signal is generated; The timing controller is in communication with the touch sensor and is configured to control the bistable liquid crystal display panel to refresh a current display image according to the pressing signal.

7. The display driving circuit according to claim 6, wherein: The display driving circuit further includes a common voltage generating circuit and a source driver communicatively connected to the timing controller; The timing controller is also used to generate a common voltage control signal and a source control signal; The common voltage generating circuit is used to output a common voltage signal to the common electrode of the bistable liquid crystal display panel according to the common voltage control signal; The source driver is used to output a source driving signal to the pixel electrode of the bistable liquid crystal display panel according to the source control signal.

8. A display device, characterized in that: A bistable liquid crystal display panel for displaying images, and a display driving circuit as claimed in claim 6 or 7; The bistable liquid crystal display panel includes a sensing electrode layer, an upper substrate, a lower substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate; The upper substrate is provided with a common electrode on a side close to the liquid crystal layer, and the lower substrate is provided with a pixel electrode on a side close to the liquid crystal layer.

9. The display device according to claim 8, wherein: The sensing electrode layer is a self-capacitive structure and is arranged between the lower substrate and the liquid crystal layer.

10. The display device according to claim 8, wherein The sensing electrode layer is a mutual capacitance structure and is arranged on a side of the upper substrate away from the liquid crystal layer.

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