Display driving device, display driving method, and display device

Abstract

The present disclosure provides a display driving device, a display driving method and a display device, and relates to the technical field of display. The display driving device comprises a storage module, a detection module and a dynamic compensation module. The detection module is connected with the storage module and the dynamic compensation module. The present disclosure obtains a current data voltage corresponding to a current display frame through the detection module, calculates an average data voltage change based on the current data voltage, a target data voltage and historical data voltages stored in the storage module, and determines a compensation precision of the dynamic compensation module based on the average data voltage change. The first gamma reference voltage and the second gamma reference voltage are adjusted. When the power supply voltage fluctuates due to changes in the display picture load, the dynamic compensation module can compensate the first gamma reference voltage and the second gamma reference voltage, thereby avoiding or improving the excessive data voltage deviation caused by the power supply voltage fluctuation, which is beneficial to improve the crosstalk phenomenon and further improve the display effect.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display driving device, a display driving method, and a display device. Background Technology

[0002] With the development of display technology, Organic Light-Emitting Diode (OLED) displays have been widely used in various electronic devices due to their advantages such as self-illumination, no need for backlighting, low power consumption, and high brightness. However, some display devices suffer from severe crosstalk problems, which affect the display effect.

[0003] Therefore, how to improve the above problems has become one of the urgent technical issues to be addressed at this stage. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a display driving device, a display driving method, and a display apparatus to improve crosstalk issues in display products and enhance display performance.

[0005] In a first aspect, this disclosure provides a display driving device, comprising: The storage module is configured to store historical data voltages corresponding to each display frame within the first time period; The detection module, connected to the storage module, is configured at least to calculate the data voltage change based on the current data voltage and the target data voltage corresponding to the current display frame, and is also configured to calculate the average data voltage change based on the historical data voltage, the target data voltage, and the data voltage change. The dynamic compensation module, connected to the detection module, is configured to at least determine the compensation accuracy based on the average data voltage change and adjust the first gamma reference voltage and the second gamma reference voltage.

[0006] Secondly, based on the same inventive concept, this disclosure provides a display driving method, including: Calculate the change in data voltage based on the current data voltage and the target data voltage corresponding to the current display frame; Calculate the average data voltage change based on the target data voltage, the data voltage change, and the historical data voltage. The compensation accuracy is determined based on the average data voltage change, and the first gamma reference voltage and the second gamma reference voltage are adjusted.

[0007] Thirdly, based on the same inventive concept, this disclosure provides a display device including the above-mentioned display driving device.

[0008] The technical solution provided in this disclosure has the following advantages compared with the prior art: This disclosure provides a display driving device, a display driving method, and a display apparatus. The display driving device includes a storage module, a detection module, and a dynamic compensation module. The detection module is connected to both the storage module and the dynamic compensation module. The detection module acquires the current data voltage corresponding to the current display frame. Based on the current data voltage, the target data voltage, and the historical data voltage stored in the storage module, the average data voltage change is calculated. The dynamic compensation module determines the compensation accuracy based on the average data voltage change and adjusts the first gamma reference voltage and the second gamma reference voltage, thus achieving dynamic adjustment of the gamma reference voltage. When the power supply voltage fluctuates due to changes in the display load, the dynamic compensation module can compensate for the first and second gamma reference voltages, thereby avoiding or improving excessive data voltage deviation caused by power supply voltage fluctuations. This helps maintain consistent brightness, reduces crosstalk, and ultimately improves the display effect. Attached Figure Description

[0009] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0010] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 The diagram shows a relative relationship between the power supply voltage and the gamma reference voltage. Figure 2 The diagram shown is a schematic representation of a display driving device provided in an embodiment of this disclosure. Figure 3 The diagram shows the variation of the gamma reference voltage under different compensation levels according to the embodiments of this disclosure. Figure 4 The diagram shown is another schematic diagram of a display driving device provided in an embodiment of this disclosure; Figure 5 The diagram shown is a flowchart of a display driving method provided in an embodiment of this disclosure; Figure 6 The diagram shown is another flowchart of the display driving method provided in this embodiment of the present disclosure; Figure 7 The diagram shown is another flowchart of the display driving method provided in this embodiment of the present disclosure; Figure 8The diagram shown is a schematic representation of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0013] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0014] With the continuous development of display technology, display products are experiencing increasingly higher refresh rates and larger resolutions, placing higher demands on the driving capabilities of display panels. As refresh rates increase, the display time for each frame decreases, and the charging time for the data voltage of each row of pixels also decreases, leading to a greater coupling effect between the data voltage and the driving power supply. To charge the parasitic capacitance of the data lines to the target voltage within a shorter charging time, a larger driving current is required. Increased resolution means longer, denser data lines and larger parasitic capacitances, requiring even greater current or longer charging times to charge these larger parasitic capacitances. The data voltage corresponding to the data lines in the display panel is driven by a common grayscale reference voltage, through digital-to-analog conversion and buffer amplifiers. When all pixels in a row need to be charged with the same grayscale voltage simultaneously, such as when displaying a solid color background, all buffer amplifiers will output the same, large load current. If the driving capability of the buffer amplifiers is insufficient, the voltage cannot be accurately charged to the target value within the short charging time, resulting in a lower-than-expected voltage reaching the pixel. This deviation can cause uneven brightness in areas that should display a uniform grayscale, a phenomenon known as crosstalk.

[0015] The inventors discovered in their research that related technologies typically employ algorithmic compensation to mitigate crosstalk. This compensation usually involves calculating the grayscale difference between adjacent rows. For example, if the current row is detected to be displaying a dark color while adjacent rows are displaying a bright color, the algorithm predicts that the data voltage of the current row might be pulled down due to power coupling effects, and thus pre-compensates by adding an offset to the data voltage of the current row. This algorithm is usually based on a pre-defined, simplified physical model (e.g., considering only interference from adjacent rows). However, actual screen displays vary greatly, and the degree of crosstalk depends not only on adjacent rows but also on complex factors such as the overall brightness distribution of the screen, pattern shape, temperature, and aging. Therefore, a single compensation algorithm cannot satisfy all screen conditions. The display panel's driving power is typically provided by a power management chip. Due to line losses, there is a voltage drop at the actual display location, and this voltage drop dynamically changes with the overall screen brightness. To maintain screen brightness stability, the display panel's driving chip dynamically compensates for power voltage fluctuations to keep it stable. Figure 1 The diagram shown illustrates a relative relationship between the power supply voltage and the gamma reference voltage. Please refer to it. Figure 1 The figure illustrates the variations in the power supply voltage ELVDD' and the gamma reference voltage VGMP' / VGSP'. For example, when the power supply voltage ELVDD' fluctuates due to panel load, the gamma reference voltage VGMP' / VGSP' is dynamically adjusted to ensure a stable operating point for the driving transistors, i.e., a stable voltage difference between the power supply voltage ELVDD' and the gamma reference voltage VGMP' / VGSP'. Data voltages are typically generated based on the gamma reference voltage VGMP' / VGSP'. When the gamma reference voltage VGMP' / VGSP' changes dynamically, all data voltage references change, causing a change in the voltage actually written to the pixels, thus introducing visible crosstalk in specific scenes.

[0016] In view of this, the present disclosure provides a display driving device to improve the crosstalk problem of display products and improve the display effect.

[0017] Figure 2 The diagram shown is a schematic representation of a display driving device provided in an embodiment of this disclosure. Please refer to it. Figure 2 This disclosure provides a display driving device 100, comprising: Storage module 10 is configured to store historical data voltages corresponding to each display frame within a first time period; The detection module 20, connected to the storage module 10, is configured to at least calculate the data voltage change based on the current data voltage and the target data voltage corresponding to the current display frame, and is also configured to calculate the average data voltage change based on the historical data voltage, the target data voltage, and the data voltage change. The dynamic compensation module 30, connected to the detection module 20, is configured to determine the compensation accuracy based on the average data voltage change and adjust the first gamma reference voltage and the second gamma reference voltage.

[0018] Specifically, this disclosure provides a display driving device 100, including a storage module 10, a detection module 20, and a dynamic compensation module 30. The storage module 10 stores historical data voltages corresponding to multiple display frames. For example, the storage module 10 stores the historical data voltage Vdata1 corresponding to the first display frame, the historical data voltage Vdata2 corresponding to the second display frame, the historical data voltage Vdata3 corresponding to the third display frame, and so on, within a first time period. The historical data voltage refers to the actual data voltage received by the sub-pixels of that display frame.

[0019] The detection module 20 is used to acquire the current data voltage Vdata corresponding to the current display frame in real time, and calculate the data voltage change based on the current data voltage Vdata and the target data voltage. The current data voltage Vdata refers to the actual data voltage received by the sub-pixel of the current display frame, and the target data voltage refers to the theoretically received data voltage by the sub-pixel. The detection module 20 of this disclosure also considers historical data voltage. Specifically, it calculates the average value of the data voltage change in historical data based on the historical data voltage and the target data voltage stored in the storage module 10. By considering the data voltage change of the current display frame, historical data is also taken into account, which is beneficial for detecting the actual voltage deviation trend of the current display frame and a period of time prior to it. This setting is beneficial for acquiring and predicting data voltage changes, thereby improving the accuracy of voltage regulation.

[0020] The dynamic compensation module 30 is used to determine the compensation accuracy based on the average voltage change calculated by the detection module 20, thereby adjusting the first gamma reference voltage and the second gamma reference voltage. Optionally, the first gamma reference voltage can be VGMP (Gamma High Voltage), and the second gamma reference voltage can be VGSP (Gamma Low Voltage).

[0021] This disclosure determines the compensation accuracy based on the current data voltage Vdata of the current display frame and historical data voltages over a period of time, and adjusts the gamma reference voltages (first gamma reference voltage and second gamma reference voltage) to achieve dynamic adjustment of the gamma reference voltage. It should be noted that the average data voltage change is calculated based on the current data voltage Vdata of the current display frame and historical data voltages corresponding to multiple display frames over a period of time. This calculation method is beneficial for detecting the trend of data voltage changes, and can also be considered as the trend of display load changes. Determining the compensation accuracy based on the average data voltage change allows, for example, when the detection module 20 detects a change in display load, the dynamic compensation module 30 can anticipate the fluctuations in power supply voltage caused by the change in display load, thereby adjusting the first and second gamma reference voltages in advance and gradually. Adjusting the compensation accuracy based on the average data voltage change, this adaptive dynamic adjustment method is beneficial for adapting to different display scenarios. It should also be noted that fluctuations in the power supply voltage cause relative changes in the first gamma reference voltage and the second gamma reference voltage. Since the data voltage is generated based on the first and second gamma reference voltages, fluctuations in the power supply voltage will couple and affect the data voltage. This disclosure dynamically compensates for the first and second gamma reference voltages based on the change in the data voltage. When the power supply voltage fluctuates due to changes in the display load, the dynamic compensation module 30 can compensate for the first and second gamma reference voltages, thereby avoiding or improving excessive data voltage deviation caused by power supply voltage fluctuations. This helps maintain consistent brightness, reduces crosstalk, and ultimately improves the display effect.

[0022] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, the data voltage change is ΔVdata, the current data voltage corresponding to the current display frame is Vdata, and the target data voltage is Vdata_target; ΔVdata = Vdata - Vdata_target.

[0023] Specifically, the target data voltage Vdata_target refers to the theoretical voltage value that, under ideal conditions, is generated based on the gamma reference voltage and expected to be applied to the pixel according to the grayscale to be displayed in the current display frame. The current data voltage Vdata refers to the actual voltage value applied to the pixel, which may have been affected by factors such as insufficient driving capability, coupling capacitance, and power supply fluctuations. The difference between these two, ΔVdata, indicates the degree of voltage deviation. Compensating the first and second gamma reference voltages based on the data voltage change ΔVdata helps avoid under-compensation or over-compensation, and further improves the accuracy of compensation. Simultaneously, the data voltage change ΔVdata, which is the difference between the current data voltage Vdata and the target data voltage Vdata_target, also represents the severity of crosstalk, brightness unevenness, and other problems, providing a basis for dynamic compensation of the gamma reference voltage and thus further improving the accuracy of gamma reference voltage compensation.

[0024] Please continue to refer to this. Figure 2 Optionally, the first time period includes N consecutive display frames preceding the current display frame, where N ≥ 6 and N is an integer.

[0025] Specifically, this disclosure provides a method for setting a first time period, which includes at least six consecutive display frames. It should be noted that when N < 6, the amount of data used to calculate the average data voltage change is too small; the average value is almost equal to the instantaneous value, making it impossible to detect the trend of data voltage being affected across multiple consecutive display frames, thus affecting the prediction of crosstalk. Therefore, this disclosure sets the first time period to include at least six display frames, calculating the average value using data from at least six frames. This setting is more conducive to detecting the degree and trend of data voltage deviation. For example, when the detection module 20 detects that the average data voltage change is continuously negative and has a large absolute value, it means that the data voltage is continuously insufficient and crosstalk is severe. This allows the dynamic compensation module 30 to adjust the first gamma reference voltage and the second gamma reference voltage in advance, which is beneficial for stabilizing the data voltage and further improving the crosstalk phenomenon. This disclosure provides an optional implementation in which the first time period includes 10 consecutive display frames preceding the current display frame; another optional implementation in which the first time period includes 15 consecutive display frames preceding the current display frame; yet another optional implementation in which the first time period includes 18 consecutive display frames preceding the current display frame; and still another optional implementation in which the first time period includes N consecutive display frames preceding the current display frame, where N ≥ 20.

[0026] In one optional embodiment of this disclosure, the average data voltage change is ΔVdata_ave; ; Where Vdatai represents the historical data voltage corresponding to the i-th display frame within the first time period.

[0027] Specifically, this disclosure provides a method for calculating the average data voltage variable ΔVdata_ave. It averages the differences between the historical data voltage Vdatai and the target data voltage Vdata_target of each display frame within a first time period, and the differences between the current data voltage Vdata and the target data voltage Vdata_target of the current display frame, to obtain the average value of the actual voltage deviation of the current data frame and each display frame within the first time period. This setting facilitates the detection of the actual voltage deviation trend of the current display frame and a period prior to it, thereby facilitating the detection of crosstalk and its trends. This, in turn, allows the dynamic compensation module 30 to determine the compensation accuracy based on the actual deviation, enabling adaptive adjustment of the first and second gamma reference voltages. This improves the compensation effect on the gamma reference voltage, thereby avoiding or mitigating excessive data voltage deviation caused by power supply voltage fluctuations. Consequently, it helps maintain consistent brightness, reduces crosstalk, and ultimately improves the display effect.

[0028] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, the voltage value after compensation of the first gamma reference voltage is VGMP, and the voltage value after compensation of the second gamma reference voltage is VGSP. VGMP = ELVDD + V1 + ΔV1 - VGMP; VGSP = ELVDD + V2 + ΔV2 - VGSP; Here, ELVDD represents the voltage value of the first power signal supplied to the pixel circuit in the display panel, V1 and V2 are fixed voltage values, ΔV1_VGMP represents the compensation value for the first gamma reference voltage, and ΔV2_VGSP represents the compensation value for the second gamma reference voltage.

[0029] Specifically, this embodiment provides a method for compensating for the first gamma reference voltage and the second gamma reference voltage. It should be noted that in the pixel driving circuit, the voltage difference between the gate voltage of the driving transistor and the first power supply signal determines the current flowing through the light-emitting unit. The gate voltage of the driving transistor is derived from the data voltage, which is referenced to the gamma reference voltage. If the first power supply signal fluctuates while the gamma reference voltage remains constant, the actual voltage difference changes, leading to a change in brightness. By binding the first and second gamma reference voltages to the first power supply signal, the voltage difference can be kept relatively stable, thereby stabilizing the brightness. When the display panel displays a high-brightness image, the voltage value ELVDD of the first power supply signal will experience a voltage drop due to the large current. This disclosure compensates for the effect of this voltage drop by causing the voltage values ​​of the first and second gamma reference voltages to decrease as the voltage value ELVDD of the first power supply signal decreases. For example, when the voltage value of the first power supply signal ELVDD decreases due to increased load, the voltage values ​​of the first gamma reference voltage and the second gamma reference voltage also decrease accordingly. This causes the data voltage (based on the reduced first and second gamma reference voltages) to also decrease, thus maintaining a relatively stable voltage difference between the driving transistor gate and the first power supply signal, resulting in stable current and improved brightness. This disclosure adds dynamic compensation values ​​ΔV1_VGMP and ΔV2_VGSP to the fixed offsets (V1 and V2). These two compensation values ​​are determined based on the average data voltage change ΔVdata_ave, which reflects the data voltage deviation caused by crosstalk and other factors. Using this deviation to determine the compensation for the first and second gamma reference voltages facilitates crosstalk compensation. For example, if the average data voltage change is negative (indicating that the data voltage is generally low), the voltage values ​​of the first and second gamma reference voltages can be appropriately increased by adjusting ΔV1_VGMP and ΔV2_VGSP. This compensates for the compensated voltage values ​​VGMP and VGSP of the first and second gamma reference voltages, thereby raising the reference value of the data voltage and compensating for its deficiency. The compensation values ​​ΔV1_VGMP and ΔV2_VGSP are not fixed but determined based on the average data voltage change ΔVdata_ave (i.e., the deviation between the actual voltage and the target voltage). The specific values ​​of ΔV1_VGMP and ΔV2_VGSP can be set according to the actual situation, thus providing adaptive compensation for the gamma reference voltage. For example, when crosstalk is severe (large voltage deviation), the compensation amount can be increased; when crosstalk is slight, the compensation amount can be decreased; and when there is no crosstalk, the compensation amount can be zero. Therefore, the adaptive compensation of the present invention avoids over-compensation or under-compensation, and improves the accuracy and reliability of compensation.

[0030] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, the display driving device 100 includes multiple compensation modes, including a first mode; in the first mode, when the first power signal changes, the compensation value ΔV1_VGMP of the first gamma reference voltage and the compensation value ΔV2_VGSP of the second gamma reference voltage remain constant.

[0031] It should be noted that voltage fluctuations in the first power signal may occur during significant adjustments to global brightness, such as a sudden increase in brightness when moving from indoors to outdoors. In this case, compensating for the first and second gamma reference voltages forces significant fluctuations in the operating voltage of the driving transistors. While this temporarily stabilizes the image quality, repeated voltage stress over a long period accelerates transistor aging, affecting device lifespan and consequently the lifespan of the display panel. The display panel provided in this disclosure includes multiple compensation modes. In the first mode, the compensation values ​​of the first gamma reference voltage ΔV1_VGMP and the second gamma reference voltage ΔV2_VGSP are kept constant. This method allows for brief image quality fluctuations (such as slight crosstalk) during power signal transitions, while avoiding the impact of high voltage differences on the transistors, thus extending transistor lifespan and consequently, the lifespan of the display panel.

[0032] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, ΔV1_VGMP = 0 and ΔV2_VGSP = 0. Specifically, in this embodiment, the compensation values ​​ΔV1_VGMP and ΔV2_VGSP of the first gamma reference voltage are both 0. At this time, the voltage value VGMP after compensation of the first gamma reference voltage is ELVDD + V1, and the voltage value VGSP after compensation of the second gamma reference voltage is ELVDD + V2. That is, VGMP and VGSP are determined only by the voltage value ELVDD of the first power supply signal and a fixed offset voltage (V1, V2). With this setting, the first and second gamma reference voltages only jump with the transition of the first power supply signal, avoiding the impact of high voltage difference on the transistor, which is more conducive to extending the life of the transistor and thus to extending the life of the display panel.

[0033] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, the display driving device 100 includes multiple compensation modes, including a second mode; in the second mode, when the first power signal changes, the compensation value ΔV1_VGMP of the first gamma reference voltage and the compensation value ΔV2_VGSP of the second gamma reference voltage change with the change in the average data voltage ΔVdata_ave.

[0034] Specifically, in the second mode, the compensation values ​​ΔV1_VGMP and ΔV2_VGSP of the first and second gamma reference voltages change with the average data voltage change ΔVdata_ave. That is, the compensation values ​​(ΔV1_VGMP and ΔV2_VGSP) are dynamically adjusted following the average data voltage change ΔVdata_ave. For example, when the first power signal changes, the load on the display changes, leading to insufficient charging of the data voltage through coupling effects. This results in the average data voltage change ΔVdata_ave not being zero, manifesting as crosstalk in the display. In the second mode, the detection module 20 detects the average data voltage change ΔVdata_ave and sets the compensation values ​​ΔV1_VGMP and ΔV2_VGSP of the first and second gamma reference voltages based on this change. When the average data voltage change ΔVdata_ave changes, the compensation value of the first gamma reference voltage ΔV1_VGMP and the compensation value of the second gamma reference voltage ΔV2_VGSP are also adjusted to compensate for the data voltage loss caused by the first power signal jump, which helps to improve crosstalk and improve the display effect of the display product.

[0035] In one optional embodiment of this disclosure, ΔV1_VGMP ≠ 0, and ΔV2_VGSP ≠ 0. Specifically, ΔV1_VGMP represents the compensation value for the first gamma reference voltage, and ΔV2_VGSP represents the compensation value for the second gamma reference voltage. ΔV1_VGMP ≠ 0 and ΔV2_VGSP ≠ 0 indicate that compensation is performed for both the first and second gamma reference voltages, thereby compensating for the data voltage loss caused by the first power signal transition. This helps to improve crosstalk and enhance the display effect of the display product.

[0036] Please continue to refer to this. Figure 2 In one optional embodiment of this disclosure, the compensation value ΔV1_VGMP of the first gamma reference voltage corresponding to different average data voltage changes ΔVdata_ave is different, and the compensation value ΔV2_VGSP of the second gamma reference voltage corresponding to different average data voltage changes ΔVdata_ave is also different. The second mode includes a first sub-mode and a second sub-mode; the compensation value ΔV1_VGMP of the first gamma reference voltage corresponding to the same average data voltage change ΔVdata_ave is different in the first sub-mode and the second sub-mode, and the compensation value ΔV2_VGSP of the second gamma reference voltage corresponding to the same average data voltage change is different in the first sub-mode and the second sub-mode.

[0037] Specifically, in this embodiment, different compensation values ​​are set for different average data voltage changes ΔVdata_ave to achieve dynamic compensation for the first and second gamma reference voltages. In the second mode, it is further divided into a first sub-mode and a second sub-mode. In the first and second sub-modes, different compensation values ​​are used for the same average data voltage change ΔVdata_ave; that is, the compensation levels of the first and second sub-modes are different. Optionally, the compensation level of the first sub-mode is less than that of the second sub-mode. In the first sub-mode, the compensation values ​​for the first and second gamma reference voltages are smaller; in the second sub-mode, the compensation values ​​for the first and second gamma reference voltages ΔV1_VGMP and ΔV2_VGSP are larger. With this setting, in the first sub-mode, the compensation action is gentle, with less voltage stress on the transistors, which helps extend the lifespan of the display panel and reduce overall power consumption; it also has a certain improvement effect on crosstalk. In the second sub-mode, the compensation effect is better, more conducive to suppressing crosstalk and improving display effect, but the improvement on the lifespan of the display panel is smaller.

[0038] It should be noted that the first sub-mode and the second sub-mode provided in this disclosure have different levels of compensation. One sub-mode provides a higher degree of crosstalk reduction, while the other provides a better lifespan extension effect. In practical applications, users can choose according to their actual needs, which helps to improve the adaptability and flexibility of the display driver device 100. It should also be noted that when the compensation level reaches its maximum, the compensation values ​​of the first and second gamma reference voltages are also at their maximum, resulting in maximum compensation for the data voltage driving capability and the best crosstalk reduction effect.

[0039] Figure 3 The diagram shown illustrates the variation of the gamma reference voltage under different compensation levels according to embodiments of this disclosure. Please refer to [the diagram]. Figure 3 , Figure 3The diagram shows that the voltage value ELVDD of the first power signal fluctuates. The curve Mode 0 corresponding to the voltage value VGMP / VGSP after gamma reference voltage compensation indicates that the compensation value ΔV1_VGMP=0 and ΔV2_VGSP=0 for the gamma reference voltage, that is, no compensation is performed on the gamma reference voltage. In this mode, the voltage stress on the transistor is small, which is more conducive to extending the life of the display panel and reducing the overall power consumption. The curves Mode 1 to Mode 3 corresponding to the voltage value VGMP / VGSP after gamma reference voltage compensation indicate that the compensation value ΔV1_VGMP≠0 and ΔV2_VGSP is not equal to 0. Curves Mode1 to Mode3 offer different levels of compensation for the gamma reference voltage. Curve Mode3 provides the maximum compensation, ensuring that the compensated gamma reference voltage values ​​VGMP / VGSP remain unaffected when the voltage value ELVDD of the first power signal fluctuates. Curves Mode1 and Mode2 offer compensation levels between Mode0 and Mode3, which helps reduce the coupling effect between the data voltage and the first power signal, improve crosstalk, reduce voltage stress on the transistors, extend the lifespan of the display panel, and lower overall power consumption.

[0040] Figure 4 The diagram shown is another schematic representation of the display driving device provided in this disclosure embodiment. Please refer to [the diagram]. Figure 4 In one optional embodiment of this disclosure, the display driving device 100 further includes: The drive module 40, connected to the dynamic compensation module 30, is configured to drive the display panel to display based on the compensated first gamma reference voltage and the compensated second gamma reference voltage. The mode selection module 60, connected to the driver module 40, is configured at least to acquire compensation mode; The coefficient register 50 is configured to write the corresponding compensation precision according to the compensation mode.

[0041] Specifically, the driving module 40 is the final executor in the display driving device 100. The driving module 40 receives the first and second gamma reference voltages after compensation and adjustment from the dynamic compensation module 30, and drives the display panel to display based on these voltages. The mode selection module 60 is used to obtain the compensation mode, that is, to determine which mode to use to compensate the first and second gamma reference voltages. The coefficient register 50 is written with the corresponding compensation precision according to the compensation mode determined by the mode selection module 60, which is equivalent to storing the specific compensation value. Optionally, the compensation precision written in the coefficient register 50 for the same compensation mode is a compensation range. Depending on the amount of change in the average data voltage, the corresponding specific compensation value is obtained within the compensation range. This embodiment introduces the mode selection module 60 and the coefficient register 50, allowing users to set the corresponding compensation mode according to their needs. This improves the flexibility and configurability of the display driving device 100, and also enables a balance between improving crosstalk and extending lifespan based on requirements.

[0042] Based on the same inventive concept, this disclosure provides a display driving method. Figure 5 The diagram shown is a flowchart of a display driving method provided in an embodiment of this disclosure. Please refer to it. Figure 1 and Figure 5 The display driver methods include: Step S10: Calculate the data voltage change based on the current data voltage and the target data voltage corresponding to the current display frame; Step S20: Calculate the average data voltage change based on the target data voltage, the data voltage change, and the historical data voltage. Step S30: Determine the compensation accuracy based on the average data voltage change, and adjust the first gamma reference voltage and the second gamma reference voltage.

[0043] It should be noted that this disclosure provides a display driving method, which is driven by any of the display driving devices 100 provided in the embodiments of this disclosure. The display driving method includes, but is not limited to, steps S10 to S30.

[0044] Specifically, this disclosure preliminarily determines the crosstalk situation of the current display frame by detecting the change in data voltage between the current data voltage and the target data voltage corresponding to the current display frame. Then, by combining the historical data voltages and target data voltages of multiple display frames within a first time period, the average data voltage change corresponding to the current display frame is calculated. The compensation accuracy is determined based on the average data voltage change. This adaptive, dynamic adjustment of compensation accuracy is beneficial for adapting to different display scenarios. This disclosure dynamically compensates for the first and second gamma reference voltages based on the data voltage change. When the power supply voltage fluctuates due to changes in the display load, the compensation module adjusts the first and second gamma reference voltages, which helps maintain a stable voltage difference between the power supply voltage and the gamma reference voltage. This, in turn, helps stabilize the current of the driving transistors, thus helping to maintain consistent brightness, improve crosstalk, and ultimately improve the display effect.

[0045] Figure 6 The diagram shown is another flowchart of the display driving method provided in this embodiment. Please refer to it. Figure 1 and Figure 6 In one optional embodiment of this disclosure, before determining the compensation accuracy based on the average data voltage change in step S30, the method further includes: Step S23: Obtain the compensation mode.

[0046] Specifically, the display driving method provided in this disclosure further includes step S23, which involves obtaining the compensation mode, i.e., determining which mode to use to compensate the first gamma reference voltage and the second gamma reference voltage. This setting allows users to configure the corresponding compensation mode according to their needs, improving the flexibility and configurability of the display driving device 100. Furthermore, different compensation modes mean different degrees of compensation for the gamma reference voltage. A higher compensation level means the gamma reference voltage is less affected by power supply voltage fluctuations, which in turn reduces the impact on the data voltage, promoting uniform display brightness and reducing crosstalk. A lower compensation level means the driving transistor experiences less voltage stress, further extending the display panel's lifespan and reducing overall power consumption. In practical applications, this allows for a balance between improving crosstalk and extending lifespan based on specific needs.

[0047] Figure 7 The diagram shown is another flowchart of the display driving method provided in this embodiment. Please refer to it. Figure 1 and Figure 7 In one optional embodiment of this disclosure, the display driving method further includes: step S40, driving the display panel to display according to the first gamma reference voltage and the second gamma reference voltage.

[0048] It should be noted that in steps S10 to S30 of this disclosure, the current data voltage of the current display is detected. Based on the current data voltage and the data voltage within each display frame in the first time period, the average data voltage change is calculated based on the target data voltage. The first gamma reference voltage and the second gamma reference voltage are adjusted according to the average data voltage change. When the power signal changes, the impact on the first gamma reference voltage and the second gamma reference voltage is reduced, which helps to maintain the stability of the voltage difference between the power supply voltage and the gamma reference voltage, thereby helping to stabilize the current of the driving transistor, thus helping to maintain consistent brightness, improve crosstalk, and further improve the display effect. In step S40, a corresponding data voltage is generated based on the compensated first gamma reference voltage and second gamma reference voltage, and then the display panel is driven to display.

[0049] Based on the same inventive concept, this disclosure provides a display device. Figure 8 The diagram shown is a schematic representation of a display device provided in an embodiment of this disclosure. Please refer to it. Figure 8 The display device 200 includes a display driving device 100, which is the display driving device 100 in any embodiment of the present disclosure.

[0050] It should be noted that the embodiments of the display device 200 provided in this disclosure can refer to the embodiments of the display driving device 100 described above, and the repeated parts will not be described again. The display device 200 provided in this disclosure can be any product and component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, or navigator.

[0051] As can be seen from the above embodiments, the display driving device, display driving method, and display device provided in this disclosure achieve at least the following beneficial effects: This disclosure provides a display driving device, a display driving method, and a display apparatus. The display driving device includes a storage module, a detection module, and a dynamic compensation module. The detection module is connected to both the storage module and the dynamic compensation module. The detection module acquires the current data voltage corresponding to the current display frame. Based on the current data voltage, the target data voltage, and the historical data voltage stored in the storage module, the average data voltage change is calculated. The dynamic compensation module determines the compensation accuracy based on the average data voltage change and adjusts the first gamma reference voltage and the second gamma reference voltage, thus achieving dynamic adjustment of the gamma reference voltage. When the power supply voltage fluctuates due to changes in the display load, the dynamic compensation module can compensate for the first and second gamma reference voltages, thereby avoiding or improving excessive data voltage deviation caused by power supply voltage fluctuations. This helps maintain consistent brightness, reduces crosstalk, and ultimately improves the display effect.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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.

[0053] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display driving device, characterized in that, include: The storage module is configured to store historical data voltages corresponding to each display frame within the first time period; The detection module, connected to the storage module, is configured at least to calculate the data voltage change based on the current data voltage and the target data voltage corresponding to the current display frame, and is also configured to calculate the average data voltage change based on the historical data voltage, the target data voltage, and the data voltage change. The dynamic compensation module, connected to the detection module, is configured to at least determine the compensation accuracy based on the average data voltage change and adjust the first gamma reference voltage and the second gamma reference voltage.

2. The display driving device according to claim 1, characterized in that, The data voltage change is ΔVdata, the current data voltage corresponding to the current display frame is Vdata, and the target data voltage is Vdata_target; ΔVdata = Vdata - Vdata_target.

3. The display driving device according to claim 2, characterized in that, The first time period includes N consecutive display frames preceding the current display frame, where N ≥ 6 and N is an integer; The average data voltage change is ΔVdata_ave; ； Wherein, Vdatai represents the historical data voltage corresponding to the i-th display frame within the first time period.

4. The display driving device according to claim 1, characterized in that, The voltage value after compensation of the first gamma reference voltage is VGMP, and the voltage value after compensation of the second gamma reference voltage is VGSP. VGMP = ELVDD + V1 + ΔV1 - VGMP; VGSP = ELVDD + V2 + ΔV2 - VGSP; Wherein, ELVDD represents the voltage value of the first power signal supplied to the pixel circuit in the display panel, V1 and V2 are fixed voltage values, ΔV1_VGMP represents the compensation value for the first gamma reference voltage, and ΔV2_VGSP represents the compensation value for the second gamma reference voltage.

5. The display driving device according to claim 4, characterized in that, The display driving device includes multiple compensation modes, including a first mode; In the first mode, when the first power signal changes, the compensation values ​​of the first gamma reference voltage and the second gamma reference voltage remain constant.

6. The display driving device according to claim 5, characterized in that, ΔV1_VGMP=0, ΔV2_VGSP=0.

7. The display driving device according to claim 4, characterized in that, The display driving device includes multiple compensation modes, including a second compensation mode; In the second mode, when the first power signal changes, the compensation values ​​of the first gamma reference voltage and the second gamma reference voltage change with the change in the average data voltage.

8. The display driving device according to claim 7, characterized in that, ΔV1_VGMP≠0, ΔV2_VGSP≠0.

9. The display driving device according to claim 7, characterized in that, The compensation value of the first gamma reference voltage corresponding to different average data voltage changes is different, and the compensation value of the second gamma reference voltage corresponding to different average data voltage changes is also different. The second mode includes a first sub-mode and a second sub-mode; The compensation values ​​of the first gamma reference voltage corresponding to the same average data voltage change are different in the first sub-mode and the second sub-mode, respectively, and the compensation values ​​of the second gamma reference voltage corresponding to the same average data voltage change are different in the first sub-mode and the second sub-mode, respectively.

10. The display driving device according to claim 1, characterized in that, Also includes: The driving module, connected to the dynamic compensation module, is configured to drive the display panel to display based on the compensated first gamma reference voltage and the compensated second gamma reference voltage. The mode selection module, connected to the driving module, is configured at least to acquire the compensation mode; The coefficient register is configured to write the corresponding compensation precision according to the compensation mode.

11. A display driving method, characterized in that, include: Calculate the change in data voltage based on the current data voltage and the target data voltage corresponding to the current display frame; Calculate the average data voltage change based on the target data voltage, the data voltage change, and the historical data voltage. The compensation accuracy is determined based on the average data voltage change, and the first gamma reference voltage and the second gamma reference voltage are adjusted.

12. The display driving method according to claim 11, characterized in that, Before determining the compensation accuracy based on the average data voltage change, the method further includes: Obtain compensation mode.

13. The display driving method according to claim 11, characterized in that, Also includes: The display panel is driven to display based on the first gamma reference voltage and the second gamma reference voltage.

14. A display device, characterized in that, The display driving device includes any one of claims 1 to 10.

Images