Display device and display method

Abstract

This application provides a display device and a display method. The display device includes a display panel and a driver chip. The display panel is divided into at least two display zones along the longitudinal direction. Each display zone corresponds to a preset anode voltage parameter. The driver chip is electrically connected to the display panel and outputs a matching target anode voltage to the anode of the light-emitting element according to the anode voltage parameter of each display zone. This invention improves display uniformity and image quality by independently configuring the anode voltage for each longitudinal zone, thereby simultaneously improving light leakage in black screens and uneven color and brightness in low-brightness grayscale.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and display method. Background Technology

[0002] With the widespread application of AMOLED display technology, high contrast, wide viewing angle, and thinness have become core advantages of terminal products. However, in actual use, issues such as light leakage in black areas and uneven grayscale display at low brightness are prominent. To suppress light leakage, existing technologies often adjust the OLED anode voltage to be more negative. While this can improve light leakage, it significantly deteriorates the color and brightness uniformity at low grayscale levels, making it difficult to achieve a balance between the two defects.

[0003] Because the scanning clock signal load is unevenly distributed along the vertical direction, AMOLED panels are more prone to waveform delay and distortion at the top of the panel, causing black screen light leakage to occur in specific areas. At the same time, process and design defects can easily cause horizontal and through-type brightness and color unevenness. Traditional single fixed anode voltage cannot adapt to the compensation needs of different areas, making it difficult to eliminate local display abnormalities in a targeted manner.

[0004] Existing driving solutions mostly use a globally uniform anode voltage, which cannot be configured differently according to display zones. This means that they cannot accurately suppress light leakage in zones, nor can they guarantee the uniformity of color and brightness in low-brightness grayscale ranges, resulting in limited display panel yield and visual experience. Summary of the Invention

[0005] This application provides a display device and display method that solves the problem of light leakage in black screens, avoids the degradation of display performance at low brightness, and improves display uniformity and image quality.

[0006] In a first aspect, the display device provided in the embodiments of this application includes a display panel and a driver chip; the display panel is divided into at least two display partitions along the longitudinal direction, and each display partition corresponds to a preset anode voltage parameter; The driving chip is electrically connected to the display panel and is used to output a matching target anode voltage to the anode of the light-emitting element of the corresponding display zone according to the anode voltage parameters corresponding to each display zone.

[0007] Secondly, the display method provided in the embodiments of this application is applied to a display device, and the method includes: According to the anode voltage parameters corresponding to each display zone, the target anode voltage is output to the anode of the light-emitting element of the corresponding display zone.

[0008] In summary, this application divides the display panel vertically into at least two display zones and configures independent anode voltage parameters for each zone. First, it can accurately provide the anode voltage that prevents light leakage in black areas of the corresponding zones based on differences in clock load and light leakage levels, thus suppressing zone light leakage from the driving source. Second, the anode voltage parameter ensures uniform color and brightness in low-brightness areas where the grayscale value is less than the preset grayscale threshold, avoiding low-grayscale degradation caused by global negative voltage. Finally, the driver chip outputs the matching target anode voltage according to the zone calibration value, realizing independent driving of each zone, thereby simultaneously improving black-screen light leakage and uneven color and brightness in low-brightness grayscale, enhancing display uniformity, image quality, and product yield. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings described below are merely for illustrating some embodiments of the present invention. Those skilled in the art can obtain other drawings based on the above drawings without any creative effort.

[0010] Figure 1 This is one of the schematic diagrams of a display device provided for an embodiment of this application.

[0011] Figure 2 This is a second schematic diagram of a display device provided for an embodiment of this application.

[0012] Figure 3 A schematic diagram of 20 display partitions provided for embodiments of this application.

[0013] Figure 4 This is a schematic diagram of the time-domain output provided in an embodiment of this application.

[0014] Figure 5 This is a schematic diagram of a lateral, through-type, linear horizontal mura caused by a process or technology in an embodiment of this application.

[0015] Figure 6 This is a schematic diagram of the output voltage timing of the transverse Mura in an embodiment of this application. Detailed Implementation

[0016] 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 a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] In this invention, the terms "first," "second," etc., are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or modules is not limited to the listed steps or modules, but may optionally include steps or modules not listed, or may optionally include other steps or modules inherent to the aforementioned process, method, product, or apparatus.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily imply that all embodiments are the same, nor are they independent or alternative embodiments mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This application provides a display device, which includes, but is not limited to, the following embodiments and combinations thereof.

[0020] In one embodiment, Figure 1 One of the schematic diagrams of the display device provided for an embodiment of this application, such as... Figure 1 As shown, the display device 100 includes a display panel (which may be simply referred to as "Panel") 101 and a driver chip 102; the display panel 101 is divided into at least two display zones along the longitudinal direction; each display zone corresponds to a preset anode voltage parameter; The driver chip 102 is electrically connected to the display panel 101 and is used to output a matching target anode voltage to the anode of the light-emitting element of the corresponding display zone according to the anode voltage parameters corresponding to each display zone.

[0021] The display panel 101 can be, for example, an AMOLED display panel, comprising multiple light-emitting elements, and displays an image by controlling the on / off state and brightness of the light-emitting elements. The driver chip 102 receives image data and control signals, converting them into voltage and current signals required to drive the display panel 101. The display panel 101 is divided into at least two display zones along its longitudinal direction. For example, the display panel 101 can be divided into a top area and a bottom area, or into multiple equally wide vertical strip-shaped zones. This partitioning method allows for independent control of different areas of the display panel 101. The driver chip 102 integrates a voltage adjustment circuit 1021. This voltage adjustment circuit 1021 can be a standalone hardware module or a collection of multiple functional modules within the driver chip 102 working together to achieve voltage adjustment, generating and managing the voltage supplied to the anodes of the light-emitting elements in the display panel 101. The anode voltage parameter is the anode voltage value that ensures uniform chroma and brightness in the corresponding display zone when displaying a black screen without light leakage and within a brightness grayscale range where the grayscale value is less than a preset grayscale threshold.

[0022] Specifically, the display panel 101 is divided into at least two display zones along the vertical direction, and each display zone has its own preset anode voltage parameters. The anode voltage parameters are pre-configured to ensure that the corresponding display zone does not experience light leakage when displaying a black screen, and to maintain uniform color and brightness when displaying within the brightness grayscale range where the grayscale value is less than the preset grayscale threshold.

[0023] The driver chip 102 is electrically connected to the display panel 101. The driver chip 102 is used to obtain the anode voltage parameters corresponding to each display zone, and outputs a target anode voltage matching the anode voltage of the light-emitting element in the corresponding display zone according to the anode voltage parameters of each display zone. By providing matching anode voltages independently for each zone, it is possible to adapt to the differences in signal load, process, and display characteristics in different areas of the display panel, thereby suppressing light leakage in black screens while ensuring the uniformity of color and brightness in the low-brightness grayscale range, and avoiding the deterioration of display unevenness caused by a globally uniform voltage.

[0024] In one embodiment, Figure 2 A second schematic diagram of a display device provided for an embodiment of this application, as shown below. Figure 2As shown, the driver chip 102 includes a voltage adjustment circuit 1021, which stores anode voltage parameters for each display zone. The voltage adjustment circuit 1021 is used to determine a reference voltage based on the anode voltage parameters of each display zone, and to determine the target anode voltage for each display zone according to the anode voltage parameters of each display zone and the digital offset corresponding to the reference voltage. Furthermore, within a display frame cycle, it outputs the corresponding target anode voltage to the anodes of the light-emitting elements in each display zone of the display panel 101 in a time-division manner according to the scan line timing of the display panel 101. The anode voltage parameters are pre-configured by the voltage adjustment circuit 1021 for each display zone to prevent light leakage in a black screen display state. The anode voltage is configured independently for each display zone.

[0025] Specifically, the voltage adjustment circuit 1021 stores the anode voltage parameters for each display zone in advance. These anode voltage parameters can be configured manually, for example, during production or debugging phases, where technicians manually set the initial voltage value for each zone based on experience or preliminary test results. These anode voltage parameters are pre-configured by the voltage adjustment circuit 1021 for each display zone to prevent light leakage in a black screen display state. For example, this calibration value can be obtained by gradually adjusting the anode voltage of each zone in a black screen display state until the light leakage phenomenon is observed to disappear, and then recording the voltage value. The voltage adjustment circuit 1021 is used to determine a reference voltage based on the anode voltage parameters of each display zone. For example, this reference voltage can be set to a fixed value among all anode voltage parameters, or a preset universal voltage value. The voltage adjustment circuit 1021 determines the target anode voltage for each display zone based on the anode voltage parameters of each display zone and the digital offset corresponding to the reference voltage. For example, the difference between the anode voltage parameter and the reference voltage can be obtained through simple subtraction. This difference can then be used directly as a digital offset, or mapped to a digital offset using a lookup table. Ultimately, the target anode voltage can be obtained by adding or subtracting this digital offset from the reference voltage.

[0026] Within a display frame's cycle, the voltage adjustment circuit 1021 outputs the corresponding target anode voltage to the anodes of the light-emitting elements in each display zone of the display panel 101 in a time-division manner, according to the scan line timing of the display panel 101. For example, when a scan line enters a certain display zone, the voltage adjustment circuit 1021 immediately switches and outputs the target anode voltage corresponding to that zone, and switches to the target anode voltage of the next zone when the scan of that zone ends. The time-division output can be implemented using a simple switching circuit, such as using a multiplexer to select different voltage output channels according to the scan line timing.

[0027] This application divides the display panel 101 into multiple display zones and configures anode voltage parameters for each zone to suppress backlight leakage on black screens. Simultaneously, a reference voltage and digital offset are determined based on the anode voltage parameters, thereby generating and outputting the target anode voltage for each zone in a time-division manner. Therefore, this solution enables precise voltage adjustment tailored to the characteristics of different areas of the display panel 101, effectively avoiding the degradation of low brightness and uneven grayscale color caused by suppressing backlight leakage in traditional solutions. It also provides a foundation for subsequently resolving localized display anomalies caused by signal load differences or process defects.

[0028] In some embodiments of this application, a digital offset for digital control is derived from the anode voltage parameters and the reference voltage to ensure the accuracy and stability of the target anode voltage.

[0029] Based on this, in one embodiment, the value of the reference voltage is one of the average, maximum, and minimum values ​​of all anode voltage parameters; thus, the voltage adjustment circuit 1021 can acquire the anode voltage parameters when there is no black screen light leakage in each display zone, then determine the difference between the anode voltage parameters of each display zone and the reference voltage, and finally convert the difference into a digital offset based on the step value of the output target anode voltage.

[0030] Specifically, selecting the average value ensures relatively balanced voltage adjustments across all display zones, suitable for scenarios requiring overall balance. Selecting the maximum value ensures all display zones' anode voltages are adjusted to a relatively high reference, potentially suitable for scenarios requiring high brightness or specific display effects. Selecting the minimum value adjusts to a relatively low reference, potentially suitable for scenarios requiring low power consumption or specific dark-field performance. This flexible setting allows the reference voltage selection to be optimized based on specific display needs and system design goals. Simultaneously, the voltage adjustment circuit 1021 also acquires anode voltage parameters when there is no black screen light leakage in any display zone. The acquisition of anode voltage parameters is performed under stable conditions where the display panel 101 is in a black screen display state and has undergone preliminary calibration to ensure no light leakage.

[0031] Based on this, the voltage adjustment circuit 1021 determines the difference between the anode voltage parameter of each display zone and the reference voltage, thereby determining the degree of deviation of the anode voltage parameter of each display zone relative to a unified reference voltage, reflecting the amount of voltage adjustment required for each zone. Furthermore, the voltage adjustment circuit 1021 converts the difference into a digital offset based on a step value for the output target anode voltage. The step value represents the minimum voltage change that the voltage adjustment circuit 1021 can output, i.e., the accuracy of the voltage adjustment. By dividing the analog voltage difference by this step value, a discrete digital quantity, i.e., the digital offset, can be obtained. The digital offset can be directly used to drive a digital-to-analog converter (DAC) or other digital control modules to generate the required target anode voltage.

[0032] This application allows for flexible selection of the reference voltage (average, maximum, or minimum value), enabling the voltage adjustment strategy to adapt to different display requirements. Secondly, by obtaining the anode voltage parameters under stable conditions that ensure no light leakage in the black screen, the accuracy of the calibration data is guaranteed. Furthermore, by calculating the difference between the anode voltage parameters and the reference voltage, and converting it into a digital offset based on the step value of the target anode voltage, this application achieves the quantization from analog voltage calibration to digital control signals. This not only solves the problem of how to convert analog voltage information into a digital offset that can be processed by digital circuits, but also ensures the accuracy and resolution of voltage adjustment by introducing a step value. This allows the voltage adjustment circuit 1021 to output the target anode voltage required by each display zone more accurately and stably, further optimizing the black screen display effect, effectively suppressing light leakage, and improving the overall display quality and reliability of the display device.

[0033] In some embodiments of this application, the characteristics of the display panel 101 may drift due to environmental changes, device aging, or other factors, causing the original anode voltage parameters to become inaccurate, which may lead to black screen light leakage and affect the display effect.

[0034] Based on this, in one embodiment, the voltage adjustment circuit 1021 can also recalibrate the anode voltage parameters of each display zone and update the digital offset and target anode voltage when the light leakage phenomenon of each display zone changes in the black screen display state.

[0035] Specifically, when changes occur in the light leakage phenomenon of each display zone in the black screen display state, it can be detected in various ways. For example, the display device can integrate a light sensor to periodically detect the light leakage in the black screen display state; or, an image processing algorithm can be used to analyze the black screen image of the display panel 101 to identify whether there are abnormal brightness areas. In addition, users can also report the light leakage phenomenon through a feedback mechanism, triggering the display device to make adaptive adjustments.

[0036] When a change in light leakage is detected, the voltage adjustment circuit 1021 can initiate a recalibration process. This process typically involves gradually adjusting the anode voltage of each display zone while the screen is in a blackout state until light leakage no longer occurs in that zone. For example, starting from the current target anode voltage, the anode voltage can be gradually reduced in preset steps while monitoring for light leakage, until a critical point is reached where light leakage just stops. This voltage value is then determined as the new anode voltage parameter. This process can be performed independently for each display zone to ensure optimal light leakage suppression for each zone.

[0037] After recalibrating to obtain new anode voltage parameters, the voltage adjustment circuit 1021 recalculates the digital offset corresponding to each display zone based on the new anode voltage parameters. Specifically, the voltage adjustment circuit 1021 calculates the difference between the new anode voltage parameters and the previously determined reference voltage, and converts this difference into a new digital offset. Subsequently, the display device redetermines the target anode voltage corresponding to each display zone based on the updated digital offset. The updated parameters are stored in the voltage adjustment circuit 1021 and applied in subsequent display cycles to ensure that the display panel 101 maintains a light-leakage-free state continuously in the black screen display state.

[0038] In this application, when the black screen backlight leakage phenomenon of the display panel 101 changes due to various factors, the display device can adaptively recalibrate the anode voltage parameters of each display zone and update the digital offset and target anode voltage accordingly. This allows the display device to dynamically adjust the driving parameters, effectively addressing the drift of the display panel 101 characteristics caused by changes over time or in the environment, thereby continuously suppressing the black screen backlight leakage phenomenon. This ensures that the display panel 101 consistently provides a high-quality black screen display effect during long-term use, avoiding display defects caused by fixed parameters, and improving the stability of the display device and the user experience.

[0039] In some embodiments of this application, when the display panel 101 switches from one display zone to the next, if the switching and stabilization time of the target anode voltage is insufficient, the voltage output may be unstable, thereby affecting the quality of the display screen, or even causing visual abnormalities such as flickering or uneven brightness.

[0040] Based on this, in one embodiment, the voltage adjustment circuit 1021 includes at least two generation units, a preloading unit, an analog switching unit, and a buffer; the generation units are respectively connected to the preloading unit, the analog switching unit, and the buffer; the generation unit is used to generate a corresponding analog voltage as the target anode voltage according to the digital offset; the preloading unit is used to control the idle generation unit to preload the target anode voltage of the next display partition of the current display partition when any generation unit outputs the target anode voltage of the current display partition, and to complete the voltage stabilization process; the analog switching unit is used to switch to the output terminal of the voltage-stabilized generation unit when the scanning line timing of the display panel 101 switches to the next display partition; the buffer is connected to the output terminal of the generation unit and is used to provide driving current to suppress the drop or overshoot of the target anode voltage.

[0041] The generation unit, a voltage adjustment circuit 1021, converts the received digital offset into an analog voltage as the target anode voltage output. To achieve time-division multiplexing of the target anode voltage for different display zones and ensure smooth and stable voltage switching, the voltage adjustment circuit 1021 is configured with at least two generation units. These generation units can operate in parallel; one unit is responsible for the voltage output of the current display zone, while another one or more units can prepare the voltage for the next or subsequent display zones in advance. The generation unit can be implemented using a digital-to-analog converter combined with a voltage adjustment module. The digital-to-analog converter converts the digital offset into an analog signal, and the voltage adjustment module calibrates and stabilizes this analog signal to generate the target anode voltage.

[0042] The preloading unit optimizes the switching efficiency and stability of the target anode voltage in the voltage adjustment circuit 1021. Specifically, when any generation unit outputs the target anode voltage for the current display zone, the preloading unit controls another generation unit that is currently idle, causing it to preload and prepare the target anode voltage for the next display zone. This "preloading" process includes converting the digital offset into an analog voltage and performing necessary voltage stabilization processing, such as waiting for the voltage to reach a set value and eliminating transient responses. Through the preloading mechanism, the time required for voltage switching can be effectively shortened, ensuring that the corresponding target anode voltage is ready and stable when the display panel 101 scans to the next display zone.

[0043] The analog switching unit is used to achieve time-division multiplexing of the target anode voltage for different display zones. For example, when the scan line timing of the display panel 101 switches to the next display zone, the output path can be smoothly switched from the generation unit currently outputting voltage to the output terminal of the generation unit that has completed voltage stabilization and is ready to output the target anode voltage for the next display zone. The switching must be fast and seamless to avoid transient voltage fluctuations during the switching process, thereby ensuring the continuity and stability of the display screen. The analog switching unit is typically composed of a high-speed, low-on-resistance analog switch array, which can select and connect to the corresponding generation unit output according to the control signal.

[0044] A buffer is connected to the output of the generation unit to provide drive current to handle the transient current demands that may arise from the light-emitting elements of the display panel 101 during operation. When the scan lines of the display panel 101 switch or the state of the light-emitting elements changes, the load current may change rapidly. Without sufficient drive capability, the target anode voltage may experience a momentary drop or overshoot. The buffer, with its high input impedance and low output impedance characteristics, effectively isolates the generation unit from the load, providing a stable output voltage, thereby suppressing voltage fluctuations, ensuring that the light-emitting elements receive a stable and target anode voltage, and maintaining the uniformity and stability of the displayed image. In this application, the voltage adjustment circuit 1021 is configured with at least two generation units, a preloading unit, an analog switching unit, and a buffer, forming an efficient voltage output switching mechanism. The preloading unit allows the target anode voltage for the next display zone to be preloaded and stabilized in an idle generation unit while the current display zone is operating. When the scan line timing of the display panel 101 switches to the next display zone, the analog switching unit can quickly and smoothly switch to the already stabilized generation unit, avoiding screen abnormalities caused by voltage switching delays or instability. Simultaneously, the buffer effectively suppresses the drop or overshoot of the target anode voltage during load changes, ensuring that the light-emitting element receives a continuous and stable driving voltage. This improves the response speed and stability of the voltage output in multi-zone display mode, effectively solving problems such as screen flickering and uneven brightness that may occur during zone switching, thereby ensuring high-quality display and a superior visual experience.

[0045] In some embodiments of this application, how to ensure the accuracy and stability of the conversion from digital offset to the final analog voltage, and effectively calibrate with a reference voltage to generate a stable target anode voltage that meets display requirements, is a technical problem that needs to be further solved.

[0046] Accordingly, in one embodiment, the generation unit includes a digital-to-analog converter and a voltage regulation module; the digital-to-analog converter is used to convert digital offsets into analog signals; the voltage regulation module is used to calibrate the analog signals against a reference voltage to generate a stable target anode voltage.

[0047] Specifically, the digital-to-analog converter (DAC) receives a digital offset from the voltage adjustment circuit 1021, typically represented in binary code, and converts it into an analog voltage or current signal proportional to that digital value. For example, the DAC can employ an R-2R ladder network structure, a weighted resistor network structure, or a Σ-Δ modulation structure to achieve high-precision and high-linearity digital-to-analog conversion. Through the DAC, the digitized voltage adjustment command is converted into a voltage signal that can be processed by subsequent analog circuitry to generate the target anode voltage.

[0048] Based on this, the voltage regulation module receives the analog signal output from the digital-to-analog converter and the reference voltage provided by the voltage regulation circuit 1021. This module uses an internal feedback control mechanism to calculate and calibrate the analog signal and the reference voltage; for example, it uses the analog signal as an offset or gain factor for the reference voltage, thereby generating an adjusted and highly stable target anode voltage. In this application, the generation unit is refined into a digital-to-analog converter and a voltage regulation module, enabling the conversion of digital offsets to analog voltages. The digital-to-analog converter accurately converts the digital offsets into analog signals, providing a basis for subsequent voltage regulation. Based on this, the voltage regulation module performs voltage calibration on the analog signal and the reference voltage, effectively eliminating errors and external interference during the conversion process, ensuring the stability and accuracy of the final output target anode voltage. This significantly improves the control precision and stability of the anode voltage in each display zone, effectively suppressing black screen light leakage and ensuring the consistency of brightness and color between display zones in the time-sharing drive mode of the display panel 101, thereby improving the overall display effect.

[0049] In some embodiments of this application, in addition to the problem of light leakage on black screens, the display panel 101 may also exhibit abnormal screen phenomena such as uneven brightness, color shift, and mura. These abnormalities may not be present across the entire area, but rather concentrated in specific scan line areas, and cannot be effectively resolved by simply adjusting the voltage at the zone level.

[0050] Based on this, in one embodiment, the voltage adjustment circuit 1021 is further configured to: determine, based on the brightness and color uniformity detection results of the display panel 101, a target scan line range corresponding to color and brightness unevenness in the image of the display panel 101; configure a digital offset corresponding to the target scan line range; and when the display panel 101 scans to the target scan line range, output a target anode voltage corresponding to the digital offset to compensate for the color and brightness unevenness of the target scan line range. The width of the target scan line range is a preset number of lines.

[0051] Specifically, the brightness and color uniformity detection results of the display panel 101 can be obtained in various ways. For example, manual visual inspection can be used, where the display screen of the display panel 101 is observed manually to identify and record the type, location, and severity of screen anomalies. More preferably, automated optical inspection equipment, such as high-precision colorimeters, luminance meters, spectrometers, or image sensors, can be used to scan and analyze the display panel 101 to obtain quantitative data on parameters such as brightness, color, and uniformity, reflecting the visual performance of the display panel 101 and providing an objective basis for subsequent anomaly identification. After obtaining the brightness and color uniformity detection results, the voltage adjustment circuit 1021 or the control unit communicating with it will analyze the data according to a preset algorithm or rules to identify the specific areas of screen anomalies. For example, if the brightness values ​​of several rows of pixels are detected to deviate significantly from the average value, or if there is obvious color uniformity, the scan lines corresponding to the abnormal areas are defined as the target scan line range. This process can be performed down to a single scan line to ensure the accuracy of compensation. The width of the target scan line range, i.e., the number of affected scan lines, can be preset according to the actual type and severity of the image anomaly and the characteristics of the display panel 101. For example, for minor line defects or pixel anomalies, the preset number of lines can be small, covering only a few lines where the anomaly occurs; for larger-scale Mura effects or uneven brightness, the preset number of lines can be increased accordingly to ensure the continuity and integrity of the compensation effect. This preset number of lines can be a fixed value or dynamically adjusted according to the detected anomaly characteristics. Once the target scan line range is determined, the voltage adjustment circuit 1021 calculates and configures one or more digital offsets according to the type and severity of the image anomaly. The digital offset represents the amount of adjustment required to the target anode voltage within the target scan line range. For example, if the image anomaly is manifested as low brightness, a positive digital offset is configured to increase the anode voltage; if it is manifested as high brightness, a negative digital offset is configured to decrease the anode voltage. The digital offsets can be pre-stored in the memory of the voltage adjustment circuit 1021, or calculated in real time by the control unit and sent to the voltage adjustment circuit 1021. The voltage adjustment circuit 1021 monitors the scanning line timing of the display panel 101 in real time. When the scanning line of the display panel 101 enters the predetermined target scanning line range, the voltage adjustment circuit 1021 immediately switches and outputs the target anode voltage after digital offset adjustment.

[0052] As an example, the number of display partitions can be denoted as n; assuming n=20, Figure 3 This diagram illustrates 20 display partitions provided for embodiments of this application. A display partition can also be simply referred to as a region. Figure 3As shown. The specific steps include: First, by observing the phenomenon of "stealing light," find the VI-ANO voltages (V1~V20) in 20 areas where there is exactly no "stealing light." Second, set a reference voltage value V0, which can be the average, maximum, or minimum value of the above 20 areas. Third, calculate the difference between the VI-ANO voltage in each area and the reference voltage, ΔV1, ΔV2…ΔV20. Fourth, based on the minimum step of the VI-ANO output by the DIC, calculate the offsets (offset1~offset20) of the voltage in each area relative to the reference voltage. Fifth, in actual output, the VI-ANO output is not divided by area, but by time domain, as shown... Figure 4 As shown, Figure 4 This is a schematic diagram of the time-domain output provided in an embodiment of this application. The first row to the 132h row correspond to... Figure 2 In the V1 voltage region, the output V1 = V0 + offset1; lines 133 to 264h correspond to the V2 voltage region, where the output V1 = V0 + offset2; lines 265 to 396h correspond to... Figure 2 In the V3 voltage region, the output V1 = V0 + offset3; ... lines 2509 to 2640h correspond to... Figure 2 In the V20 voltage range, the output V1 = V0 + offset20.

[0053] In summary, this application can compensate for localized image anomalies appearing on the display panel 101. Since traditional display devices primarily address issues like black screen light leakage through zone-level voltage adjustment, this approach is often ineffective for localized, subtle image anomalies (such as murmurs, uneven brightness, or color shifts). Therefore, this application introduces visual effect detection, determination of the target scan line range, and targeted digital offset configuration, enabling the voltage adjustment circuit 1021 to dynamically and output an adjusted target anode voltage when the display panel 101 scans a specific abnormal area. This effectively eliminates or mitigates localized image anomalies, significantly improves the uniformity and visual consistency of the displayed image, thereby greatly enhancing the user's visual experience and allowing the display device to present high-quality images in various display scenarios.

[0054] In some embodiments of this application, image anomalies may not only manifest as deviations in brightness or overall voltage, but may also involve imbalances or color casts in specific color components. If only a single digital offset is used for overall compensation, complex color anomalies may not be resolved, resulting in unsatisfactory compensation effects, and may even introduce new color distortions.

[0055] Based on this, in one embodiment, the digital offset includes a voltage increase adjustment and a voltage decrease adjustment; the voltage adjustment circuit 1021 is also used to: configure the three primary colors of the display panel 101 according to the voltage increase adjustment or the voltage decrease adjustment to compensate for the unevenness of color and brightness in the target scan line range of the image.

[0056] The digital offset is a digital value used to adjust the target anode voltage. Combined with a reference voltage, it ultimately generates the actual output analog voltage. To achieve finer voltage adjustment, this application further refines the digital offset into a voltage increase adjustment and a voltage decrease adjustment. The voltage increase adjustment provides a positive digital gain when an increase in anode voltage is needed, while the voltage decrease adjustment provides a negative digital loss when a decrease in anode voltage is needed.

[0057] Display panel 101 typically displays various colors through combinations of red, green, and blue primary color sub-pixels. Image anomalies often manifest as deviations in specific color components, such as localized areas appearing reddish or greenish. To accurately compensate for color anomalies, voltage adjustment circuit 1021 is designed to separately configure the driving voltages corresponding to the three primary colors (i.e., the red, green, and blue sub-pixels) of display panel 101 based on whether the voltage is increased or decreased.

[0058] As an example, at least two display partitions can be denoted as n; Figure 5 This is a schematic diagram of a lateral, through-type, linear horizontal mura caused by a manufacturing process or technique in an embodiment of this application. Improvement Figure 5 The horizontal, through-type, linear murras caused by the manufacturing process or technology shown can be addressed using the following steps: First, determine the width of the horizontal murras to be 10 rows based on visual effect; Second, increase or decrease the offset of the output voltage for rows n-1, n-2, ..., n-10; for example, increase the offset by 8, the specific amount of offset increase depends on visual effect; Third, increase the output voltage by 0 offset for rows 9-40h. The output voltage timing for the horizontal murras can be referenced... Figure 6 As shown, Figure 6 This is a schematic diagram of the output voltage timing of the transverse Mura in an embodiment of this application.

[0059] This application introduces voltage increase and voltage decrease adjustments as components of the digital offset, enabling the voltage adjustment circuit 1021 to configure the three primary colors of the display panel 101 separately according to the adjustment amount. This allows for more precise and targeted compensation for image anomalies. When local color cast, uneven color, or abnormal brightness of specific color components occurs, instead of simply applying a uniform voltage adjustment to the entire area, the voltage of one or more primary color components can be selectively increased or decreased to accurately correct color deviations and restore the normal color performance of the image. For example, if a reddish tint is detected in a certain area of ​​the image, the voltage adjustment circuit 1021 can apply a voltage increase adjustment to the green and blue sub-pixels in that area, or a voltage decrease adjustment to the red sub-pixels, to balance the colors and eliminate the color cast. The ability to configure colors separately significantly improves the accuracy and effect of image anomaly compensation, allowing for more accurate repair of the display image when anomalies occur, thereby enhancing the user viewing experience.

[0060] In some embodiments of this application, if the switching timing of the target anode voltage is not precisely synchronized with the scanning line timing of the display panel 101, or if there is uncertainty in the switching process between different display zones, visual defects such as uneven brightness, flickering, or abnormal color may occur at the boundary of the zone, affecting the overall display effect.

[0061] Based on this, in one embodiment, the output timing of the target anode voltage is synchronized with the scanning line timing of the display panel 101, and the voltage adjustment circuit 1021 is further configured to: switch to the target anode voltage corresponding to the target display partition when the scanning line enters the starting line of the target display partition, until the scanning line leaves the ending line of the target display partition and switches to the target anode voltage of the next partition corresponding to the target display partition.

[0062] Specifically, to ensure that the target anode voltage output to the anode of the light-emitting element in the display panel 101 is synchronized with the line-by-line scanning process of the display panel 101, the output timing of the voltage adjustment circuit 1021 in this application is synchronized with the scanning line timing of the display panel 101. This synchronization can be achieved by setting a timing controller or synchronization module inside the driver chip 102. This module receives the scanning clock signal and the line synchronization signal of the display panel 101, and precisely controls the output switching of the voltage adjustment circuit 1021 accordingly. For example, when the scanning controller issues a new line scanning command, the synchronization module triggers the voltage adjustment circuit 1021 to switch the target anode voltage after a predetermined delay or on a specific clock edge. Furthermore, by optimizing the hardware design, it can be ensured that the response speed of the voltage adjustment circuit 1021 is fast enough to meet the stringent requirements of the scanning timing.

[0063] Meanwhile, the voltage adjustment circuit 1021 needs to monitor the scanning progress of the display panel 101 in real time. When the scan line enters the starting line of the target display partition, the voltage adjustment circuit 1021 will respond immediately, switching the output voltage from the target anode voltage of the previous partition to the target anode voltage corresponding to the current target display partition. This can be achieved by detecting the scan line counter or the line synchronization signal. For example, the logic circuit inside the driver chip 102 can preset the starting line number of each display partition. When the scan line counter reaches the starting line number of a certain display partition, the logic circuit will trigger the voltage adjustment circuit 1021 to switch the voltage. To ensure the smoothness of the switching, the voltage adjustment circuit 1021 may need to preload the target anode voltage of the next partition and switch at a precise time to avoid transient voltage fluctuations.

[0064] Furthermore, once a scan line enters a display partition and switches to its corresponding target anode voltage, that voltage remains constant until the scan line completely passes through the partition, reaching its end line. When the scan line leaves the end line of the current display partition, the voltage adjustment circuit 1021 switches again, preparing to provide the corresponding target anode voltage for the next display partition. Similar to the detection of the starting line, the logic circuit inside the driver chip 102 also presets the end line number for each display partition. When the scan line counter reaches the end line number of the current display partition, the logic circuit triggers the voltage adjustment circuit 1021 again, switching it to the target anode voltage for the next display partition. This switching mechanism ensures that each display partition receives a stable and correct anode voltage during scanning, thereby guaranteeing the uniformity and stability of the displayed image.

[0065] In this application, the voltage adjustment circuit 1021 can achieve precise synchronization between the target anode voltage output timing and the scanning line timing of the display panel 101. When the scanning line enters the starting line of a specific display partition, the voltage adjustment circuit 1021 can switch to the target anode voltage corresponding to that partition in a timely and accurate manner, and maintain it until the scanning line leaves the ending line of that partition, then smoothly switch to the target anode voltage of the next partition. This avoids visual defects such as uneven brightness, flickering, or abnormal color caused by untimely or inaccurate voltage switching at the boundaries of display partitions, significantly improving the uniformity and stability of the display image, thereby improving the user's viewing experience.

[0066] In some implementations, how to effectively and accurately verify whether the voltage adjustment circuit 1021 is working normally according to the preset timing and waveform to ensure the stability and reliability of the display effect is a problem that needs to be solved.

[0067] Based on this, in one embodiment, the display device further includes a test circuit for performing time-domain waveform detection on the display frame of the display device. When it is detected that the anode presents a time-domain waveform that changes in segments within a display period of a frame, and the waveform is consistent with the timing of the target anode voltage output of the voltage adjustment circuit 1021, it is determined that the voltage adjustment circuit 1021 is in a working state.

[0068] Specifically, the test circuit is a circuit module used to monitor, diagnose, and verify the functionality of electronic systems or components. This test circuit can be integrated within the driver chip 102 as a diagnostic unit, or it can be a standalone external test device used to acquire electrical signals from key nodes within the display device in real-time or near real-time, particularly the voltage signal output from the voltage adjustment circuit 1021 to the anode of the display panel 101.

[0069] Time-domain waveform detection refers to the process by which a test circuit samples the voltage signal of the anode of the display panel 101 through an analog front-end (e.g., a sample-and-hold circuit and an analog-to-digital converter), and converts the sampled data into a digital signal for processing. This captures the dynamic characteristics and timing relationships of the anode voltage, thereby reflecting the actual output of the anode voltage.

[0070] When a waveform exhibiting time-domain, segmented variations in the anode voltage is detected within a display frame's cycle, and this waveform matches the target anode voltage output timing of the voltage adjustment circuit 1021, the test circuit or its associated control logic will determine that the voltage adjustment circuit 1021 is operational. Here, "time-domain, segmented variations in the waveform" means that within a display frame's cycle, the anode voltage is not constant but exhibits different, stepped, or segmented voltage values ​​at different times depending on the display partition, consistent with the time-division output target anode voltage characteristics of the voltage adjustment circuit 1021. "The waveform matches the target anode voltage output timing of the voltage adjustment circuit 1021" means that the timing of the voltage change detected by the test circuit (e.g., the time of switching from one display partition to another) and the voltage value precisely match the preset output plan of the voltage adjustment circuit 1021. By comparison, it can be confirmed whether the voltage adjustment circuit 1021 has correctly performed its function of time-division outputting the target anode voltage.

[0071] This application introduces a test circuit into the display device, enabling time-domain waveform detection of the display frame to monitor the actual output of the anode voltage in real-time or near real-time. By comparing the detected anode voltage waveform with the preset target anode voltage output timing of the voltage adjustment circuit 1021, it can be accurately determined whether the voltage adjustment circuit 1021 is operating normally according to design requirements. This improves the reliability of the display device and the efficiency of production testing, and reduces the occurrence of display abnormalities (such as light leakage, uneven image, etc.) caused by improper voltage control.

[0072] This application also proposes a display method using the aforementioned display device. The method includes: determining a reference voltage based on the anode voltage parameters of each display partition; and determining a target anode voltage corresponding to each display partition based on the anode voltage parameters of each display partition and the digital offset corresponding to the reference voltage; and... According to the anode voltage parameters corresponding to each display zone, the target anode voltage is output to the anode of the light-emitting element of the corresponding display zone.

[0073] The details of the display method can be found in the previous description of the display device, and will not be repeated here.

[0074] The display device and display method provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. The above modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized in that, It includes a display panel and a driver chip; the display panel is divided into at least two display zones along the longitudinal direction, and each display zone corresponds to a preset anode voltage parameter; The driving chip is electrically connected to the display panel and is used to output a matching target anode voltage to the anode of the light-emitting element of the corresponding display zone according to the anode voltage parameters corresponding to each display zone.

2. The display device according to claim 1, characterized in that, The driver chip includes a voltage adjustment circuit, which stores the anode voltage parameters of each display zone. The voltage adjustment circuit is used for: Based on the anode voltage parameters of each display partition, a reference voltage is determined, and based on the anode voltage parameters of each display partition and the digital offset corresponding to the reference voltage, a target anode voltage corresponding to each display partition is determined. as well as, Within a display cycle of one frame, according to the scanning line timing of the display panel, the corresponding target anode voltage is output to the anode of the light-emitting element in each display zone of the display panel in a time-division manner; The anode voltage parameter is a pre-configured anode voltage parameter by the voltage adjustment circuit for each display zone, which prevents light leakage in each display zone when the screen is black; the anode voltage is configured independently for each display zone.

3. The display device according to claim 2, characterized in that, The reference voltage is one of the average, maximum, and minimum values ​​of all the anode voltage parameters; the voltage adjustment circuit is further used for: When no black screen light leakage occurs in each of the aforementioned display zones, the anode voltage parameters are obtained; Determine the difference between the anode voltage parameter and the reference voltage for each of the aforementioned display zones; Based on the step value of the output target anode voltage, the difference is converted into the digital offset.

4. The display device according to claim 2, characterized in that, The voltage adjustment circuit is also used for: When the light leakage phenomenon of each of the display zones changes in the black screen display state, the anode voltage parameters of each of the display zones are recalibrated, and the digital offset and the target anode voltage are updated.

5. The display device according to claim 2, characterized in that, The voltage adjustment circuit includes at least two generation units, a preloading unit, an analog switching unit, and a buffer; the generation units are respectively connected to the preloading unit, the analog switching unit, and the buffer. The generation unit is used to generate a corresponding analog voltage as the target anode voltage based on the digital offset, so as to provide an analog voltage output for the anode voltage differentiation setting. The preloading unit is used to control the idle generation unit to preload the target anode voltage of the next display partition of the current display partition when any of the generation units outputs the target anode voltage of the current display partition, and to complete the voltage stabilization process. The analog switch unit is used to switch to the output terminal of the voltage-stable generation unit when the scanning line timing of the display panel switches to the next display partition; The buffer is connected to the output of the generation unit and is used to provide drive current to suppress the drop or overshoot of the target anode voltage.

6. The display device according to claim 5, characterized in that, The generation unit includes a digital-to-analog converter and a voltage regulation module; The digital-to-analog converter is used to convert the digital offset into an analog signal; The voltage regulation module is used to calibrate the analog signal and the reference voltage to generate a stable target anode voltage.

7. The display device according to claim 2, characterized in that, The voltage adjustment circuit is also used for: Based on the brightness and color uniformity detection results of the display panel, the target scan line range corresponding to the color and brightness unevenness of the display panel is determined; the width of the target scan line range is a preset number of lines; Configure the digital offset corresponding to the target scan line range; When the display panel scans to the target scan line range, a target anode voltage corresponding to the digital offset is output to compensate for the chromaticity and brightness unevenness of the target scan line range.

8. The display device according to claim 7, characterized in that, The digital offset includes a voltage increase adjustment and a voltage decrease adjustment; the voltage adjustment circuit is also used for: The three primary colors of the display panel are configured according to the voltage increase adjustment amount or the voltage decrease adjustment amount to compensate for the chromaticity and brightness unevenness of the target scan line range.

9. The display device according to claim 2, characterized in that, The output timing of the target anode voltage is synchronized with the scan line timing of the display panel, and the voltage adjustment circuit is further used for: When the scan line enters the starting line of the target display partition, it switches to the target anode voltage corresponding to the target display partition, until the scan line leaves the ending line of the target display partition, and then switches to the target anode voltage corresponding to the next partition of the target display partition.

10. The display device according to any one of claims 2-9, characterized in that, The display device further includes a test circuit for performing time-domain waveform detection on the display frames of the display device. When a waveform is detected that the anode presents a time-domain segmented and segmented change within a display period of a frame, and the waveform is consistent with the timing of the target anode voltage output of the voltage adjustment circuit, the voltage adjustment circuit is determined to be in operation.

11. A display method, characterized in that, The method of using the display device according to any one of claims 1-10 includes: According to the anode voltage parameters corresponding to each display zone, the target anode voltage is output to the anode of the light-emitting element of the corresponding display zone.

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