Active cholesteric product driving method, display panel, electronic device and medium

Abstract

This invention discloses an active cholesteric phase product driving method, display panel, electronic device, and medium, relating to the field of liquid crystal display driving technology. It acquires the real-time state of each pixel in the current screen and the target image to be refreshed, performs pixel-level state comparison on pixels with the same coordinates, and accurately determines whether each pixel needs to switch display modes. Based on the comparison results, it matches four types of driving timing sequences—bright-hold, dark-hold, bright-to-dark, and dark-to-bright—for different pixels and independently completes driving control. For pixels that do not require state adjustment, the liquid crystal bistable state is maintained by relying on the source and common electrodes with equal amplitude and voltage, reducing ineffective driving overhead. For pixels that need to switch, segmented voltage regulation is used, and the liquid crystal is driven to switch smoothly by limiting the voltage difference or reverse polarity voltage, avoiding operational shocks caused by voltage sudden changes. Pixel-level on-demand driving results in smooth screen refresh transitions, precise driving control, reduced operating power consumption, improved overall screen display uniformity, and enhanced user visual experience.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display driving technology, and in particular to an active cholesteric phase product driving method, display panel, electronic device and medium. Background Technology

[0002] Cholesteric liquid crystal (CLC) is widely used in low-power display scenarios such as e-paper, smart tags, and automotive displays due to its advantages such as bistable properties (i.e., it can maintain either a bright P-state or a dark FC-state without continuous power supply), low power consumption, and high reflectivity. Existing active cholesteric liquid crystal display products generally employ a full-screen reset-global write refresh mechanism: before each frame is updated, a uniform reset voltage is applied to the entire display panel, forcing all pixels to switch to the same initial state (e.g., a fully bright P-state), and then the display data of the new frame is written line by line to complete the image refresh. However, the above-mentioned existing driving scheme has a significant drawback: the full-screen reset process causes 1-2 noticeable global flickers in the display area, resulting in a harsh and abrupt visual effect that severely impacts the user's viewing experience.

[0003] Therefore, proposing a novel active cholesteric phase product-driven solution is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an active cholesteric phase product driving method, display panel, electronic device and medium to solve the problem that the existing active cholesteric phase display products generally adopt a full-screen reset-global write refresh mechanism, which visually causes the area to flash 1-2 times before writing data, which is too abrupt and affects the customer experience.

[0005] To solve the above technical problems, the present invention provides an active cholesterol-phase product driving method, comprising: Get the current pixel state of each pixel unit in the currently displayed screen, and get the target image to be refreshed; The current pixel state of each pixel unit is compared with the target state of the pixel units at the same position in the target image one by one, and the comparison results are obtained. The driving timing type required to match the corresponding pixel unit is determined based on the comparison results; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing. Based on the determined driving timing type, driving operations are performed on each pixel unit; The brightness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the darkness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the brightness-to-dark sequence is as follows: the source output voltage is first the target voltage, and then the target voltage is switched to a voltage with the same amplitude and polarity as the common output voltage, wherein the voltage difference between the target voltage and the common output voltage is less than the threshold voltage when switching from dark to bright; the darkness-to-bright sequence is as follows: the source output voltage is first opposite in polarity to the common output voltage, and then the source output voltage is switched to a voltage with the same amplitude and polarity as the common output voltage.

[0006] Preferably, after performing driving operations on each pixel unit according to the determined driving timing type, the method further includes: Get the actual display state of each pixel unit after the current driving operation; The actual display state of each pixel unit after the current driving operation is taken as the current pixel state of each pixel unit in the current display screen; Return to the step of obtaining the target image to be refreshed.

[0007] Preferably, before obtaining the current pixel state of each pixel unit in the currently displayed screen, the method further includes: Determine if the display panel is in the initial power-on state; If the display panel is detected to be in the initial power-on state, then a full-screen refresh operation is performed on the display panel; The pixel display state after the full screen is refreshed is used as the current pixel state of each pixel unit in the first image refresh.

[0008] Preferably, the common pole includes an AC common pole and a DC common pole; the AC common pole uses an alternating polarity driving voltage, and the DC common pole uses a fixed polarity driving voltage.

[0009] Preferably, in the dark-to-light timing, the source output voltage first has the opposite polarity to the common output voltage, including: Identify the type of cholesteric liquid crystal material that the current pixel unit is compatible with; Based on the driving characteristics of different types of cholesteric liquid crystal materials, the voltage difference between the source output voltage and the common output voltage is determined; wherein, a first voltage difference is configured for blue reflective cholesteric liquid crystal, a second voltage difference is configured for green reflective cholesteric liquid crystal, and a third voltage difference is configured for red reflective cholesteric liquid crystal, wherein the first voltage difference is greater than the second voltage difference, and the second voltage difference is greater than the third voltage difference. Based on the common-electrode output voltage and the determined voltage difference, the target amplitude of the source output voltage is determined; The amplitude of the source output voltage is controlled to be the target amplitude, and its polarity is opposite to that of the common output voltage.

[0010] Preferably, during the bright-to-dark timing sequence, controlling the source output voltage to first be the target voltage, and then switching it from the target voltage to a voltage with the same amplitude and polarity as the common-electrode output voltage includes: Collect the ambient temperature of the current pixel unit; The duration of the target voltage is determined based on the ambient temperature; wherein the duration of the target voltage is negatively correlated with the ambient temperature. The source output voltage is controlled to maintain the target voltage during the duration specified. After a certain duration, the source output voltage is switched from the target voltage to a voltage with the same amplitude and polarity as the common output voltage.

[0011] Preferably, performing driving operations on each pixel unit according to the determined driving timing type includes: Collect the liquid crystal status feedback signal of each pixel unit; Based on the liquid crystal state feedback signal, identify the liquid crystal characteristic deviation of the current pixel unit; Determine whether the deviation of the liquid crystal characteristics exceeds a preset threshold; If so, adjust the signal parameters in the corresponding driving timing and return to the step of collecting the liquid crystal status feedback signal of each pixel unit; wherein, the signal parameters include the voltage amplitude, duration and polarity switching timing of the driving signal; If not, then the state transition of the current pixel unit is complete.

[0012] To address the aforementioned technical problems, the present invention also provides an active cholesteric phase display panel, comprising: The acquisition module is used to acquire the current pixel state of each pixel unit in the currently displayed screen and to acquire the target image to be refreshed. The comparison and acquisition module is used to compare the current pixel state of each pixel unit with the target state of the pixel units at the same position in the target image one by one, and acquire the comparison result. The determining module is used to determine the driving timing type that needs to be matched for the corresponding pixel unit based on the comparison result; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing; The driving module is used to perform driving operations on each pixel unit according to the determined driving timing type; The brightness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the darkness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the brightness-to-dark sequence is as follows: the source output voltage is first the target voltage, and then the target voltage is switched to a voltage with the same amplitude and polarity as the common output voltage, wherein the voltage difference between the target voltage and the common output voltage is less than the threshold voltage when switching from dark to bright; the darkness-to-bright sequence is as follows: the source output voltage is first opposite in polarity to the common output voltage, and then the source output voltage is switched to a voltage with the same amplitude and polarity as the common output voltage.

[0013] To address the aforementioned technical problems, the present invention also provides an electronic device, comprising: Memory, used to store computer programs; A processor is used to implement the steps of the above-described active cholesteric product driving method when executing the computer program.

[0014] To address the aforementioned technical problems, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described active cholesteric phase product driving method.

[0015] The active cholesteric phase product driving method provided by this invention first acquires the current pixel state of each pixel unit in the current display screen and the target image to be refreshed. Based on the current pixel state, the actual display status of each pixel unit can be accurately determined. Then, the current pixel state of each pixel unit is compared one by one with the target state at the same position in the target image to obtain pixel-level comparison results, accurately distinguishing whether the pixel unit needs to switch display states. According to the comparison results, a corresponding driving timing type (bright hold timing, dark hold timing, bright to dark timing, dark to bright timing) is matched for each pixel unit, and then the driving operation is executed according to the various timing sequences. Compared with the crude mode of full-screen reset and global unified refresh in the prior art, this invention does not require applying a uniform reset voltage to the entire display panel, nor does it force all pixel units to be uniform to the same initial state, thus fundamentally avoiding the screen flickering and abrupt switching problems caused by full-area reset. Meanwhile, for pixel units whose state does not require adjustment, a bright-hold timing sequence or a dark-hold timing sequence (both with the same source and common-terminal output voltage amplitude and polarity) is adopted to stably maintain the existing display state based on the bistable characteristics of cholesteric liquid crystals, reducing unnecessary driving. For pixel units that need to switch states, the bright-to-dark timing sequence first outputs a driving signal with the source and common-terminal voltage difference less than the threshold voltage for switching from dark to bright state, and then switches to an equal-potential, same-polarity hold signal. The dark-to-bright timing sequence first outputs a driving signal with opposite polarities for the source and common-terminal, and then switches to an equal-potential, same-polarity hold signal. This segmented voltage control technique avoids the impact of a single voltage surge on the liquid crystal, and can smoothly control the transition of the liquid crystal between bright and dark states, preventing fluctuations and stuttering in the display image, and making the image refresh transition smoother. In addition, the pixel-level differentiated driving technique reduces unnecessary voltage output, which is in line with the low-power characteristics of cholesteric liquid crystals, while improving the accuracy of driving control and the overall operational stability of the display product, thus improving the user viewing experience.

[0016] In addition, the present invention also provides an active cholesteric phase display panel, an electronic device, and a computer-readable storage medium, which have the same or corresponding technical features as the active cholesteric phase product driving method mentioned above, and have the same effects. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart of an active cholesteric phase product driving method provided in an embodiment of the present invention; Figure 2This is a schematic diagram of the voltage-reflectivity characteristic curve of a cholesteric liquid crystal provided in an embodiment of the present invention; Figure 3 This invention provides a refresh timing diagram corresponding to AC common-pole operation in an embodiment of the invention. Figure 4 This invention provides a refresh timing diagram corresponding to DC common-pole operation. Figure 5 A flowchart of an active cholesteric phase product pixel driving method provided in an embodiment of the present invention; Figure 6 This is a structural diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0020] The core of this invention is to provide an active cholesteric phase product driving method, display panel, electronic device and medium, to solve the problem that the existing active cholesteric phase display product driving schemes generally adopt a full-screen reset-global write refresh mechanism, which visually causes the area to flash 1-2 times before writing data, which is too abrupt and affects the customer experience.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 A flowchart of an active cholesterol phase product driving method provided in an embodiment of the present invention is shown below. Figure 1 As shown, the method includes: S10: Obtain the current pixel state of each pixel unit in the currently displayed screen, and obtain the target image to be refreshed.

[0022] S11: Compare the current pixel state of each pixel unit with the target state of the pixel unit at the same position in the target image one by one, and obtain the comparison result.

[0023] S12: Determine the driving timing type required to match the corresponding pixel unit based on the comparison results; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing.

[0024] S13: Perform driving operations on each pixel unit according to the determined driving timing type.

[0025] The sequence is as follows: Bright-hold timing: the source output voltage and common-terminal output voltage have the same amplitude and polarity; Dark-hold timing: the source output voltage and common-terminal output voltage have the same amplitude and polarity; Bright-to-dark timing: the source output voltage is initially the target voltage, then switches to a voltage with the same amplitude and polarity as the common-terminal output voltage, with the voltage difference between the target voltage and the common-terminal output voltage less than the threshold voltage for switching from dark to bright; Dark-to-bright timing: the source output voltage initially has the opposite polarity to the common-terminal output voltage, then switches to a voltage with the same amplitude and polarity as the common-terminal output voltage. It is worth noting that in the dark-to-bright timing, the source output voltage initially has the opposite polarity to the common-terminal output voltage. At this time, it is necessary to ensure that the voltage difference between the source output voltage and the common-terminal output voltage is greater than or equal to the threshold voltage for entering the H state; the threshold voltage for switching from dark to bright is as follows: Figure 2 As shown, Figure 2 This is a schematic diagram of the voltage-reflectivity characteristic curve of cholesteric liquid crystal provided in an embodiment of the present invention, wherein the horizontal axis represents the voltage of cholesteric liquid crystal (V) and the vertical axis represents the normalized reflectivity (%).

[0026] During implementation, the real-time display status of each pixel unit on the current display panel is collected, and the current bright or dark state of each pixel is fully recorded. At the same time, the target image data to be refreshed sent by the host computer is received and parsed to determine the target state that each pixel at each coordinate position needs to present. Subsequently, using the pixel coordinates as a unique correspondence, the current actual state of the pixel at the same position is independently compared with the preset state of the target image one by one, and the state difference comparison result of each pixel unit is generated separately.

[0027] Based on the comparison differences of each pixel unit, corresponding driving timing types are specifically divided and matched. In this invention, the driving timing types include four types: bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing, covering scenarios of pixel state maintenance and bidirectional switching. After completing the timing matching, voltage driving operation is performed independently on each pixel unit according to the corresponding timing rules, realizing precise and controllable refresh of a single pixel without the need for a unified screen reset.

[0028] Cholesteric liquid crystals can exhibit three typical stable states under the influence of an electric field: planar state (P-state), focal conic state (FC-state), and homeotropic state (H-state). In the P-state, liquid crystal molecules are arranged in a regular planar helical pattern with the helical axis perpendicular to the substrate, selectively reflecting incident light of specific wavelengths, resulting in a bright pixel. In the FC-state, liquid crystal molecules form a disordered focal conic pattern, with incident light being largely scattered and absorbed, resulting in a dark pixel with low brightness. In the H-state, under a strong electric field, the liquid crystal molecules are forcibly straightened into a nematic arrangement parallel to the electric field direction, losing their reflective properties and exhibiting intermediate gray levels or a high-scattering state. In practice, a voltage of a certain duration must be applied to the liquid crystal to reach the corresponding liquid crystal state (FC and H-state). The voltage required to reach the H-state is relatively large, with an application duration of several milliseconds to tens of milliseconds; the voltage required to reach the FC-state is relatively small, with an application duration of tens to hundreds of milliseconds.

[0029] The four types of core driver timings provided by this invention are as follows: Brightness-holding timing is used to keep pixels in a bright state. It controls the source output voltage and the common output voltage to have equal amplitude and the same polarity. It relies on the equipotential voltage to stably bind the cholesteric liquid crystal molecules, so that the liquid crystal can continuously and stably maintain the P state, and the pixel image remains unchanged and maintains the bright state for a long time.

[0030] Dark hold timing is used to keep pixels in a dark state. It also controls the source output voltage and common output voltage to have the same amplitude and polarity. It uses a stable isobaric environment to lock the cholesteric liquid crystal FC state structure, prevents liquid crystal molecules from spontaneously flipping, and ensures long-term stable display of dark images.

[0031] Bright-to-dark timing is used to smoothly switch pixels from bright to dark states. First, the source output voltage is controlled to a set target voltage. The voltage difference between this target voltage and the common output voltage is strictly less than the threshold voltage when switching from dark to bright states. This prevents the liquid crystal from entering a disordered H-state arrangement and ensures a smooth transition of molecules. After the state transition is completed, the source output voltage is switched to a voltage with the same amplitude and polarity as the common output voltage to stably lock the dark FC state.

[0032] The dark-to-bright timing sequence is used for the pixel to switch from dark to bright state. First, the source output voltage and the common output voltage are controlled to keep their polarities opposite. The reverse electric field drives the liquid crystal molecules to flip in an orderly manner, breaking the original stable FC state structure. After the bright state switching is completed, the source voltage is switched to a state with the same amplitude and polarity as the common voltage, so as to stably maintain the P-state bright state display.

[0033] Specifically, common pole includes AC common pole and DC common pole; AC common pole uses an alternating polarity driving voltage, while DC common pole uses a fixed polarity driving voltage. Figure 3 This is a refresh timing diagram corresponding to an AC common-pole configuration provided in an embodiment of the present invention. Figure 3 This diagram illustrates the timing relationship between the source and common voltage waveforms during different pixel state transitions based on an AC common-pole drive scheme. The vertical axis represents voltage amplitude, and the horizontal axis represents time progression. Figure 3 The left side of the image shows four core refresh states (AC common polarity, bright to bright, dark to dark, bright to dark, dark to bright), while the waveform area on the right corresponds to different voltage stages.

[0034] The following is about Figure 3 The waveform description and working principle are explained.

[0035] AC common polarity: The common polarity output voltage is maintained at the 0V reference, exhibiting a waveform characteristic of alternating polarity changes. Figure 3 The value shown is 0V (in actual driving, it is a periodic switching between positive and negative voltages), which is used to eliminate the polarization damage of the liquid crystal material by the DC electric field and extend the device life.

[0036] Bright to Bright: The source output voltage and the AC common-electrode output voltage maintain the same amplitude and polarity, and the source voltage remains at 0V. In this state, the voltage difference across the pixel unit is zero, and the liquid crystal molecules maintain their original bright state (P-state) structure, thus achieving bright state retention.

[0037] Dark to Dark: The source output voltage has the same amplitude and polarity as the AC common-pole output voltage, and the source voltage remains at 0V. The pixel maintains a dark state (FC state) structure, thus achieving dark state preservation.

[0038] Bright to dark: The source output voltage first jumps to a target voltage higher than 0V (the amplitude is less than the threshold voltage when switching from dark to bright state), forming a low voltage drop driving environment, so that the liquid crystal molecules can smoothly transition from the bright P state; then the source voltage drops back to the 0V level with the same amplitude and polarity as the common electrode, locking the dark FC state, and completing the stable switching from bright to dark.

[0039] Dark to bright: The source output voltage first jumps to a negative voltage below 0V (opposite to the common polarity), forming a reverse electric field to drive the liquid crystal molecules to flip; then the source voltage rises back to 0V level with the same amplitude and polarity as the common polarity, locking the bright P state, thus realizing the transition from dark to bright.

[0040] Figure 4 This is a refresh timing diagram corresponding to a DC common-pole configuration provided in an embodiment of the present invention. Figure 4This diagram illustrates the timing of the source and common voltage waveforms during pixel state switching based on a DC common-pole drive scheme. The vertical axis represents voltage amplitude, and the horizontal axis represents time progression. The four refresh states are marked on the left, clearly showing the transition logic of the source voltage at different stages.

[0041] The following is about Figure 4 The waveform description and working principle are explained.

[0042] DC Common Pole: The common pole output voltage is fixed at 0V DC level. The control logic is simple and suitable for cost-sensitive low-cost applications.

[0043] Bright to Bright: The source output voltage is kept consistent with the DC common voltage level of 0V, the voltage across the pixel is zero, the liquid crystal maintains the bright state P state, and the bright state is maintained.

[0044] Dark to Dark: The source output voltage is kept consistent with the DC common-terminal 0V level, and the pixel maintains the dark state FC state structure to achieve dark state retention.

[0045] Bright to dark: The source output voltage first jumps forward to a target voltage higher than 0V (forming a low-dropout drive), causing the liquid crystal molecules to complete the transition from bright to dark; then the source voltage drops back to the 0V DC common level, locking the dark state and completing the bright-to-dark switching.

[0046] Dark to Bright: The source output voltage first jumps negatively to a voltage below 0V (forming a reverse voltage difference with the common 0V), driving the liquid crystal molecules to flip from the dark FC state to the bright P state; then the source voltage rises back to the 0V DC common level, locking the bright state, realizing the dark-to-bright conversion.

[0047] The active cholesteric phase product driving method provided in this embodiment first obtains the current pixel state of each pixel unit in the current display screen and the target image to be refreshed. Based on the current pixel state, the actual display status of each pixel unit can be accurately determined. Then, the current pixel state of each pixel unit is compared with the target state at the same position in the target image one by one to obtain pixel-level comparison results, accurately distinguishing whether the pixel unit needs to switch display states. According to the comparison results, the corresponding driving timing type (bright hold timing, dark hold timing, bright to dark timing, dark to bright timing) is matched for each pixel unit, and then the driving operation is executed according to the various timing sequences. Compared with the crude mode of full-screen reset and global unified refresh in the prior art, the present invention does not need to apply a uniform reset voltage to the entire display panel, nor does it force all pixel units to be uniform to the same initial state, thus fundamentally avoiding the screen flickering and abrupt switching problems caused by full-area reset. Meanwhile, for pixel units whose state does not require adjustment, a bright-hold timing sequence or a dark-hold timing sequence (both with the same source and common voltage amplitude and polarity) is adopted to stably maintain the existing display state based on the bistable characteristics of cholesteric liquid crystals, reducing invalid drives. For pixel units that need to switch states, the bright-to-dark timing sequence first outputs a drive signal with the source and common voltage difference less than the threshold voltage when switching from dark to bright state, and then switches to an equal potential and same polarity hold signal. The dark-to-bright timing sequence first outputs a drive signal with opposite polarities of source and common, and then switches to an equal potential and same polarity hold signal. This segmented voltage control technique avoids the impact of a single voltage change on the liquid crystal, can smoothly control the transition of the liquid crystal between bright and dark states, prevents fluctuations and stuttering in the display image, and makes the screen refresh transition smoother. Furthermore, pixel-level differentiated driving techniques reduce unnecessary voltage output, aligning with the low-power characteristics of cholesteric liquid crystals, while simultaneously improving the precision of drive control and the overall operational stability of display products, thus enhancing the user viewing experience. Additionally, the alternating polarity driving voltage applied by the AC common-polarity method effectively prevents polarization accumulation caused by prolonged exposure to a single polarity voltage in the liquid crystal layer, delaying device aging and improving the long-term reliability of the display device. The fixed polarity driving voltage of the DC common-polarity method provides a stable and unified voltage reference, facilitating precise control of the voltage difference across the pixels and adapting to the bistable state maintenance and switching requirements of cholesteric liquid crystals. The two common-polarity driving modes work together to flexibly adapt the driving strategy according to different display conditions, ensuring the stability of the displayed image while optimizing overall drive power consumption and broadening the applicability of the driving method.

[0048] To achieve continuous refresh, in some embodiments, after performing driving operations on each pixel unit according to a determined driving timing type, the method further includes: Get the actual display state of each pixel unit after the current driving operation; The actual display state of each pixel unit after the current driving operation is taken as the current pixel state of each pixel unit in the current display screen; Return to the steps for obtaining the target image to be refreshed.

[0049] In this embodiment, after each pixel unit completes its driving operation, the actual display state after the current driving is acquired, and this actual display state is set as the current pixel state for the next round of refresh. Then, the process returns to the step of acquiring the target image to be refreshed, thus forming a complete cyclic refresh process. The core control mechanism of pixel-level state comparison and timing-driven operation is continuously used. Each round of screen update uses the actual display state of the pixel units in the previous cycle as the basis for judgment, eliminating the need to repeatedly perform full-screen resets and force uniformity of initial pixel states during continuous refresh. This method avoids the screen flickering and abrupt switching defects caused by frequent full-area resets, stably achieving pixel-level on-demand driving. Simultaneously, relying on the bistable characteristics of cholesteric liquid crystals, a large number of unnecessary reset driving actions are eliminated. While ensuring smooth and continuous screen updates, this effectively reduces the power consumption of continuous refresh, further improving the long-term stability of the displayed image.

[0050] To address the issues of disordered pixel states and lack of a unified benchmark during initial power-on, and to avoid screen clutter or localized flickering during startup, some embodiments include the following step before acquiring the current pixel state of each pixel unit in the current display screen: Determine if the display panel is in the initial power-on state; If the display panel is detected to be in the initial power-on state, a full-screen refresh operation is performed on the display panel; The pixel display state after the full screen is refreshed is used as the current pixel state of each pixel unit in the first image refresh.

[0051] In this embodiment, before acquiring the current pixel state of each pixel unit, the power-on condition of the display panel is pre-detected. Only when the first power-on condition is detected is a full-screen refresh operation performed specifically. The unified pixel display state formed by the full-screen refresh is then directly used as the initial pixel state corresponding to the first image refresh. Through the unified initialization settings during the first power-on stage, the adverse effects of residual and disordered pixel states during the initial device startup can be eliminated, and pixel comparison deviations and timing matching anomalies caused by disordered initial display states can be avoided, ensuring the clarity and regularity of the first round of image refresh. Based on this initialization method, a reliable and consistent initial benchmark can be provided for pixel-by-pixel state comparison and classification timing drive, ensuring the orderly implementation of subsequent pixel-level fine-grained drive processes and improving the display effect during the first power-on from the source.

[0052] To accommodate the inherent driving characteristics differences of cholesteric liquid crystals in different reflection bands and avoid insufficient switching or voltage redundancy caused by uniform voltage drop driving, in some embodiments, during the dark-to-bright timing sequence, the source output voltage is initially opposite in polarity to the common output voltage, including: Identify the type of cholesteric liquid crystal material that the current pixel unit is compatible with; Based on the driving characteristics of different types of cholesteric liquid crystal materials, the voltage difference between the source output voltage and the common output voltage is determined; wherein, the blue reflective cholesteric liquid crystal is configured with a first voltage difference, the green reflective cholesteric liquid crystal is configured with a second voltage difference, and the red reflective cholesteric liquid crystal is configured with a third voltage difference, the first voltage difference is greater than the second voltage difference, and the second voltage difference is greater than the third voltage difference. Based on the common-terminal output voltage and the determined voltage difference, the target amplitude of the source output voltage is determined; The amplitude of the source output voltage is controlled to be the target amplitude, and its polarity is opposite to that of the common output voltage.

[0053] In this embodiment, during the dark-to-bright timing driving process, the cholesteric liquid crystal material type corresponding to the pixel unit is first identified. Based on the driving characteristics of liquid crystals in different reflection bands, the voltage difference between the source and common electrodes is set differently. According to the different driving requirements of blue-reflective, green-reflective, and red-reflective liquid crystals, the first, second, and third voltage differences are matched sequentially with progressively decreasing values. Then, the target output amplitude of the source electrode is determined by combining the common electrode output voltage, ensuring that the polarities of the two electrodes are opposite. By using appropriate voltage difference parameters for different liquid crystal materials, the working requirements of various liquid crystals can be accurately matched, avoiding the insufficient adaptability problem caused by uniform voltage difference driving. This ensures that all types of liquid crystals can smoothly complete state switching, while reducing ineffective energy consumption and improving the overall stability and display uniformity of synchronous driving of multiple types of cholesteric liquid crystals.

[0054] In order to achieve precise control of the source output voltage during the bright-to-dark timing sequence, in some embodiments, the source output voltage is first controlled to be the target voltage, and then switched from the target voltage to a voltage with the same amplitude and polarity as the common-electrode output voltage. Collect the ambient temperature of the current pixel unit; The duration of the target voltage is determined based on the ambient temperature; the duration of the target voltage is negatively correlated with the ambient temperature. The source output voltage is controlled to maintain the target voltage for a given duration. After a certain duration, the source output voltage is switched from the target voltage to a voltage with the same amplitude and polarity as the common output voltage.

[0055] In this embodiment, the duration of the target voltage is adjusted based on the ambient temperature. The duration is negatively correlated with the ambient temperature, thus adapting to the operating characteristics of cholesteric liquid crystals at different temperatures. At low temperatures, the duration is extended to ensure the liquid crystal fully completes state switching; at high temperatures, the duration is shortened to reduce unnecessary driving power consumption. Precise control of the source voltage switching timing allows the bright-to-dark timing driving parameters to adaptively adjust with the environment, effectively improving the display switching effect at different temperatures and enhancing overall driving stability and environmental adaptability.

[0056] Furthermore, to compensate for individual differences in the liquid crystal characteristics of pixel units within the same panel and to avoid problems such as uneven display and image retention caused by material or process deviations, in some embodiments, driving operations are performed on each pixel unit according to a determined driving timing type, including: Collect the liquid crystal status feedback signal of each pixel unit; Based on the liquid crystal status feedback signal, identify the liquid crystal characteristic deviation of the current pixel unit; Determine whether the deviation of liquid crystal characteristics exceeds a preset threshold; If so, adjust the signal parameters in the corresponding driving timing and return to the step of collecting the liquid crystal status feedback signal of each pixel unit; wherein, the signal parameters include the voltage amplitude, duration and polarity switching timing of the driving signal; If not, then the state transition of the current pixel unit is complete.

[0057] In this embodiment, during the driving operation of the pixel unit, the liquid crystal status feedback signal is collected in real time to accurately identify the liquid crystal characteristic deviations of each pixel, and the deviation is determined in combination with a preset threshold. For pixel deviations exceeding the threshold, timing parameters such as the driving voltage amplitude, duration of action, and polarity switching timing are adjusted in a timely manner to form a closed-loop control for real-time correction. This method can adapt to the individual differences in liquid crystals of different pixel units, compensate for the impact of material characteristic fluctuations, avoid switching anomalies and image defects caused by uniform driving parameters, effectively improve the accuracy and stability of pixel state switching, and ensure a uniform and good overall display image.

[0058] The active cholesterol-phase product-driven method has been described in detail above. To enable those skilled in the art to better understand the above solution, the overall solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings. Figure 5 A flowchart of an active cholesteric phase product pixel driving method provided in an embodiment of the present invention is shown below. Figure 5 As shown, the method includes: S14: Full-screen refresh; S15: First pixel comparison; S16: First image refresh; S17: Pixel comparison; S18: The image is refreshed, and the process returns to step S17.

[0059] In step S16, during the first image refresh, when switching from bright to dark, the bright-to-dark timing sequence is used; when keeping bright, the bright-to-hold timing sequence is used. In step S18, when switching from bright to dark, the bright-to-dark timing sequence is used; when keeping bright, the bright-to-hold timing sequence is used; when keeping dark, the dark-to-hold timing sequence is used; and when switching from dark to bright, the dark-to-bright timing sequence is used. After step S18, if image refresh is no longer needed, the process stops and returns to step S17.

[0060] Figure 5 In the initial screen refresh, the entire screen is initially illuminated. Then, each pixel is compared based on the image to be displayed in the next frame. Since the initial refresh is fully illuminated, subsequent refreshes will only involve either maintaining brightness or switching from brightness to darkness (see [reference needed] for details on maintaining brightness and switching). Figure 3 and Figure 4 The timing sequence is as follows: then each pixel executes the corresponding timing sequence to refresh the image based on the comparison result; when the image is refreshed and the next image is refreshed, pixel comparison is performed again. At this time, the pixel switching timing sequence will have four cases (brightness hold, darkness hold, bright to dark, dark to bright, etc.), each of which can be referred to Figure 3 and Figure 4 The timing sequence is used to refresh the image; then, by continuously looping this process, flicker-free image refresh can be achieved, improving the user experience.

[0061] In the above embodiments, the active cholesteric phase product driving method has been described in detail. The present invention also provides embodiments corresponding to an active cholesteric phase display panel and an electronic device. It should be noted that the present invention describes the embodiments of the device portion from two perspectives: one based on functional modules, and the other based on hardware.

[0062] The active cholesterol phase display panel provided in this embodiment of the invention, from the perspective of functional modules, includes: The acquisition module is used to acquire the current pixel state of each pixel unit in the currently displayed screen and to acquire the target image to be refreshed. The comparison and acquisition module is used to compare the current pixel state of each pixel unit with the target state of the pixel units at the same position in the target image one by one, and acquire the comparison results. The determination module is used to determine the driving timing type that needs to be matched for the corresponding pixel unit based on the comparison results; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing. The driving module is used to perform driving operations on each pixel unit according to the determined driving timing type; The timing sequence for holding a bright state is as follows: the source output voltage and the common output voltage have the same amplitude and polarity. The timing sequence for holding a dark state is as follows: the source output voltage and the common output voltage have the same amplitude and polarity. The timing sequence for switching from bright to dark state is as follows: the source output voltage is first the target voltage, and then it switches from the target voltage to a voltage with the same amplitude and polarity as the common output voltage. The voltage difference between the target voltage and the common output voltage is less than the threshold voltage when the cholesteric liquid crystal switches from the dark state to the bright state. The timing sequence for switching from dark to bright state is as follows: the source output voltage is first opposite in polarity to the common output voltage, and then it switches to a voltage with the same amplitude and polarity as the common output voltage.

[0063] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0064] Figure 6 A structural diagram of an electronic device provided in an embodiment of the present invention. This embodiment is based on a hardware perspective, such as... Figure 6 As shown, the electronic device includes: Memory 20 is used to store computer programs; The processor 21 is used to execute a computer program to implement the steps of the active cholesteric product driving method as described in the above embodiments.

[0065] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0066] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the active cholesteric phase product driving method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include, but is not limited to, the data involved in the active cholesteric phase product driving method mentioned above.

[0067] In some embodiments, the electronic device may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0068] Those skilled in the art will understand that Figure 6 The structures shown do not constitute a limitation on electronic devices and may include more or fewer components than those shown.

[0069] The electronic device provided in this embodiment of the invention includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: an active cholesteric phase product driving method, with the same effect as above.

[0070] Finally, the present invention also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, performs the steps described in the above method embodiments.

[0071] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0072] The computer-readable storage medium provided by this invention includes the aforementioned active cholesteric phase product driving method, with the same effect.

[0073] The above provides a detailed description of the active cholesteric phase product driving method, display panel, electronic device, and medium provided by the present invention. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the invention, and these improvements and modifications also fall within the protection scope of the present invention.

[0074] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An active cholesterol-phase product-driven method, characterized in that, include: Get the current pixel state of each pixel unit in the currently displayed screen, and get the target image to be refreshed; The current pixel state of each pixel unit is compared with the target state of the pixel units at the same position in the target image one by one, and the comparison results are obtained. The driving timing type required to match the corresponding pixel unit is determined based on the comparison results; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing. Based on the determined driving timing type, driving operations are performed on each pixel unit; The brightness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the darkness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the brightness-to-dark sequence is as follows: the source output voltage is first the target voltage, and then the target voltage is switched to a voltage with the same amplitude and polarity as the common output voltage, wherein the voltage difference between the target voltage and the common output voltage is less than the threshold voltage when switching from dark to bright; the darkness-to-bright sequence is as follows: the source output voltage is first opposite in polarity to the common output voltage, and then the source output voltage is switched to a voltage with the same amplitude and polarity as the common output voltage.

2. The active cholesterol-phase product driving method according to claim 1, characterized in that, After performing driving operations on each pixel unit according to the determined driving timing type, the method further includes: Get the actual display state of each pixel unit after the current driving operation; The actual display state of each pixel unit after the current driving operation is taken as the current pixel state of each pixel unit in the current display screen; Return to the step of obtaining the target image to be refreshed.

3. The active cholesterol-phase product driving method according to claim 1 or 2, characterized in that, Before obtaining the current pixel state of each pixel unit in the currently displayed screen, the process also includes: Determine if the display panel is in the initial power-on state; If the display panel is detected to be in the initial power-on state, then a full-screen refresh operation is performed on the display panel; The pixel display state after the full screen is refreshed is used as the current pixel state of each pixel unit in the first image refresh.

4. The active cholesterol-phase product driving method according to claim 1 or 2, characterized in that, The common pole includes AC common pole and DC common pole; the AC common pole uses an alternating polarity driving voltage, and the DC common pole uses a fixed polarity driving voltage.

5. The active cholesterol-phase product driving method according to claim 1, characterized in that, During the dark-to-bright timing sequence, the source output voltage initially has the opposite polarity to the common output voltage, including: Identify the type of cholesteric liquid crystal material that the current pixel unit is compatible with; Based on the driving characteristics of different types of cholesteric liquid crystal materials, the voltage difference between the source output voltage and the common output voltage is determined; wherein, a first voltage difference is configured for blue reflective cholesteric liquid crystal, a second voltage difference is configured for green reflective cholesteric liquid crystal, and a third voltage difference is configured for red reflective cholesteric liquid crystal, wherein the first voltage difference is greater than the second voltage difference, and the second voltage difference is greater than the third voltage difference. Based on the common-electrode output voltage and the determined voltage difference, the target amplitude of the source output voltage is determined; The amplitude of the source output voltage is controlled to be the target amplitude, and its polarity is opposite to that of the common output voltage.

6. The active cholesterol-phase product driving method according to claim 1, characterized in that, During the bright-to-dark timing sequence, controlling the source output voltage to first be the target voltage, and then switching it from the target voltage to a voltage with the same amplitude and polarity as the common-electrode output voltage includes: Collect the ambient temperature of the current pixel unit; The duration of the target voltage is determined based on the ambient temperature; wherein the duration of the target voltage is negatively correlated with the ambient temperature. The source output voltage is controlled to maintain the target voltage during the duration specified. After a certain duration, the source output voltage is switched from the target voltage to a voltage with the same amplitude and polarity as the common output voltage.

7. The active cholesterol-phase product driving method according to claim 1, characterized in that, Performing driving operations on each pixel unit according to the determined driving timing type includes: Collect the liquid crystal status feedback signal of each pixel unit; Based on the liquid crystal state feedback signal, identify the liquid crystal characteristic deviation of the current pixel unit; Determine whether the deviation of the liquid crystal characteristics exceeds a preset threshold; If so, adjust the signal parameters in the corresponding driving timing and return to the step of collecting the liquid crystal status feedback signal of each pixel unit; wherein, the signal parameters include the voltage amplitude, duration and polarity switching timing of the driving signal; If not, then the state transition of the current pixel unit is complete.

8. An active cholesteric phase display panel, characterized in that, include: The acquisition module is used to acquire the current pixel state of each pixel unit in the currently displayed screen and to acquire the target image to be refreshed. The comparison and acquisition module is used to compare the current pixel state of each pixel unit with the target state of the pixel units at the same position in the target image one by one, and acquire the comparison result. The determining module is used to determine the driving timing type that needs to be matched for the corresponding pixel unit based on the comparison result; wherein, the driving timing type includes bright hold timing, dark hold timing, bright to dark timing, and dark to bright timing; The driving module is used to perform driving operations on each pixel unit according to the determined driving timing type; The brightness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the darkness holding sequence is as follows: the source output voltage and the common output voltage have the same amplitude and polarity; the brightness-to-dark sequence is as follows: the source output voltage is first the target voltage, and then the target voltage is switched to a voltage with the same amplitude and polarity as the common output voltage, wherein the voltage difference between the target voltage and the common output voltage is less than the threshold voltage when switching from dark to bright; the darkness-to-bright sequence is as follows: the source output voltage is first opposite in polarity to the common output voltage, and then the source output voltage is switched to a voltage with the same amplitude and polarity as the common output voltage.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the active cholesteric product driving method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the active cholesteric phase product driving method as described in any one of claims 1 to 7.

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