CN114299891B - Display panel driving method, driver and display device - Google Patents
Display panel driving method, driver and display device Download PDFInfo
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Abstract
The invention discloses a display panel driving method, a driver and a display device, and relates to the technical field of displays, wherein the method comprises the following steps: when the display panel displays pictures, determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode; a voltage signal having a desired voltage value is applied to the shared electrode. The invention adjusts the leakage speed of the sub-pixel area of each pixel by adjusting the voltage of the shared electrode, so that the display panel can maintain the same brightness under different refresh rates, and the display quality is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel driving method, a driver, and a display device.
Background
Currently, most high frequency displays have a refresh rate variable function. For example, a 120HZ display may have a refresh rate variation range of 48 to 120HZ. When the refresh rate is changed from 120HZ to 48HZ, the time of one frame of 48HZ becomes long. For the multi-domain pixel structure, due to the existence of the shared electrode, after one frame time is prolonged, the pixel voltage is reduced in potential due to electric leakage, so that the brightness is reduced, and the display quality is affected.
Disclosure of Invention
The invention mainly aims to provide a display panel driving method, a driver and a display device, and aims to solve the technical problem that display brightness instability easily occurs when a refresh rate is adjusted in a display device with a multi-domain pixel structure in the prior art.
In order to achieve the above object, the present invention provides a display panel driving method, the display panel including a plurality of scan lines, a plurality of data lines, and pixels distributed in an array, each pixel including a main pixel region and a sub-pixel region, the main pixel region and the sub-pixel region being connected to a same scan line and a same data line, the sub-pixel region being further connected to a common electrode, the display panel driving method comprising:
when the display panel displays pictures, determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode;
a voltage signal having a desired voltage value is applied to the shared electrode.
Optionally, applying a voltage signal having a desired voltage value to the shared electrode includes:
when the refresh rate of the display panel is detected to be adjusted, determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode;
determining a first difference between a required voltage value and a first voltage value corresponding to the shared electrode at the adjusted refresh rate;
and compensating the voltage value of the first current voltage signal according to the first difference value.
Optionally, compensating the voltage value of the first current voltage signal according to the first difference value includes:
when the first voltage value is larger than the required voltage value, reducing the current voltage signal applied to the shared electrode by the amplitude corresponding to the first difference value; and when the first voltage value is smaller than the required voltage value, increasing the current voltage signal applied to the shared electrode by the amplitude corresponding to the first difference value.
Optionally, determining a first voltage value corresponding to the first current voltage signal applied to the shared electrode includes:
detecting the voltage of the first current voltage signal applied to the shared electrode for multiple times according to a preset time interval to obtain multiple voltage data;
an average value of the voltage data is determined and taken as a first voltage value.
Optionally, determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and a preset mapping relation includes:
determining a target mapping relation from preset mapping relation according to the display brightness of the display panel, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under different display brightness and the voltage value required by the sharing electrode;
and determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and the target mapping relation.
Optionally, applying a voltage signal having a desired voltage value to the shared electrode includes:
when the brightness of the display panel is detected to be adjusted, determining a second voltage value corresponding to a second current voltage signal applied to the shared electrode;
determining a second difference value between a required voltage value and a second voltage value corresponding to the adjusted brightness of the shared electrode;
and compensating the voltage value of the second current voltage signal according to the second difference value.
Optionally, before determining the required voltage value of the shared electrode according to the refresh rate of the display panel and the preset mapping relationship, the method further includes:
measuring the actual voltage value of the voltage signal applied to the shared electrode when the display panel maintains the same brightness at different refresh rates;
and constructing a mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
Optionally, constructing the mapping relationship according to the correspondence between each actual voltage value and each refresh rate includes:
adjusting the brightness of the display panel to obtain the corresponding relation between each actual voltage value and each refresh rate under different brightness;
and constructing a mapping relation according to the corresponding relation.
In addition, in order to achieve the above object, the present invention provides a driver for driving a display panel, the display panel including a plurality of scan lines, a plurality of data lines, and pixels distributed in an array, each pixel including a main pixel region and a sub-pixel region, the main pixel region and the sub-pixel region being connected to a same scan line and a same data line, the sub-pixel region being further connected to a common electrode, the driver comprising:
the computing module is used for determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relation when the display panel displays pictures, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel and the required voltage value of the shared electrode;
and a power supply module for applying a voltage signal having a desired voltage value to the common electrode.
In addition, in order to achieve the above object, the present invention also provides a display device, which includes a driver and a display panel, wherein the driver is disposed in an inactive display area of the display panel, and the driver is the driver described above.
When the display panel displays pictures, the invention determines the required voltage value of the shared electrode according to the refresh rate of the display panel and the preset mapping relation, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode; and then a voltage signal with a required voltage value is applied to the shared electrode. The invention adjusts the leakage speed of the sub-pixel area of each pixel by adjusting the voltage of the shared electrode, so that the display panel can maintain the same brightness under different refresh rates, and the display quality is improved.
Drawings
FIG. 1 is a schematic diagram of a display device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a pixel according to the present invention;
FIG. 3 is a flowchart illustrating a driving method of a display panel according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a driving method of a display panel according to a second embodiment of the present invention;
fig. 5 is a block diagram of a first embodiment of a display panel driving apparatus according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the |
| 10 | Driver(s) | 203 | |
| 101 | |
2031 | |
| 102 | |
2032 | |
| 103 | Driving unit | M1～M3 | First to third |
| 104 | Memory device | Clc1～Clc2 | First to |
| 20 | Display panel | Cst1～Cst2 | First to |
| 201 | |
100 | |
| 202 | |
200 | Power supply module |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device of a hardware running environment according to an embodiment of the present invention.
As shown in fig. 1, the display device includes a driver 10 and a display panel 20, the driver being disposed in an inactive display area of the display panel. The display area of the display panel 20 includes a plurality of scan lines 201, a plurality of data lines 202, and pixels 203 distributed in an array. The driver 10 includes a timing controller 101, a power management unit 102, a driving unit 103, and a memory 104. The driving unit 103 may include a source controller for inputting a data signal to the data line 202 to display a corresponding pixel, and a gate controller; the gate controller is used for inputting a scanning signal to the scanning line 201, so that the corresponding gate is correspondingly turned on. The timing controller 101 may be provided therein with a processor that executes the display panel driving method provided in the embodiment of the present invention by calling the display panel driving program stored in the memory 104. The Memory 104 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable Memory (NVM), such as a disk Memory. The memory 104 may also be a storage device separate from the aforementioned processor 1001.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a pixel according to the present invention.
As shown in fig. 2, the pixel 203 includes a main pixel region 2031 and a sub-pixel region 2032, the main pixel region 2031 and the sub-pixel region 2032 are connected to the same scanning line 201 and the same data line 202, and the sub-pixel region 2032 is also connected to the shared electrode 204. The main pixel area 1031 includes a first thin film transistor M1, a first pixel capacitor Clc1 and a first storage capacitor Cst1; the sub-pixel region 2032 includes a second thin film transistor M2, a third thin film transistor M3, a second pixel capacitor Clc2, and a second storage capacitor Cst2, and one end of the third thin film transistor M3 is connected to the common electrode 204. The pixel structure shown in fig. 2 may be an eight-domain pixel structure, in which the main pixel region 2031 and the sub pixel region 2032 input the same data voltage, but since the sub pixel region 2032 can be divided by the sharing electrode 204, the voltages of the pixel capacitors in the main pixel region 2031 and the sub pixel region 2032 are different. Meanwhile, the main pixel region 2031 and the sub pixel region 2032 are configured with liquid crystal cells of four orientations so that liquid crystal molecules in the pixel 203 have 8 different deflection directions. Of course, the number of initial orientations of the liquid crystal molecules in the main pixel region 2031 and the sub pixel region 2032 may be other, which is not limited in this embodiment.
Example two
Based on the above hardware structure, an embodiment of the display panel driving method of the present invention is presented.
Referring to fig. 3, fig. 3 is a flowchart illustrating a first embodiment of a display panel driving method according to the present invention.
In this embodiment, the structure of the display panel can be referred to the foregoing, and the display panel driving method includes the steps of:
step S10: when the display panel displays a picture, the required voltage value of the shared electrode is determined according to the refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode.
It should be understood that the execution body of the present embodiment may be the aforementioned driver, and specifically may be a timing controller in the driver, where the timing controller has functions of data processing, data communication, program running, and the like.
It should be noted that, for the multi-domain pixel architecture, the sub-pixel area in each pixel is connected to the sharing electrode; because the time of each frame is different under different refresh rates, the leakage time of the sub-pixel area is also different; therefore, the display brightness of the sub-pixel region is related to the voltage of the shared electrode. In general, the higher the voltage of the common electrode, the higher the display brightness of the sub-pixel region.
In this embodiment, the display panel has uniform display brightness at different refresh rates, and when the display panel operates at different refresh rates, different voltages are applied to the sharing electrode, so as to adjust the brightness of the sub-pixel region. The required voltage value of the shared electrode refers to the voltage value on the shared electrode when the display panel maintains a brightness.
Therefore, the required voltage value also needs to be measured before driving. That is, when the display panel maintains the same brightness at different refresh rates, the actual voltage value of the voltage signal applied to the common electrode is measured; and constructing a mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
For example, the brightness of the display panel at 48HZ, 90HZ, and 120HZ is measured, respectively, and the voltage of the shared electrode is adjusted so that the display panel maintains the same brightness. At this time, the actual voltage of the shared electrode is the required voltage value of the shared electrode. For example, at the same display brightness, when the display refresh rate is 48HZ, the required voltage value of the shared electrode may be 10V; when the display refresh rate is 90HZ, the required voltage value of the shared electrode may be 9V; when the display refresh rate is 120HZ, the desired voltage value for the shared electrode may be 8.7V.
It should be noted that the foregoing preset mapping relationship may be stored in the memory in advance, and when the timing controller drives the display panel, the timing controller reads the preset mapping relationship from the memory, and determines the required voltage value of the corresponding shared electrode according to the current refresh rate.
In specific implementation, voltage data corresponding to different refresh rates can be stored to different addresses of the memory, and corresponding required voltage values can be obtained through addressing. For example, voltage data 10V for a display refresh rate of 48HZ is stored at a 0X00 address; storing voltage data 9V for which the display refresh rate is 90HZ at a 0X01 address; voltage data 8.7V for a display refresh rate of 120HZ is stored at the 0X03 address. When the time schedule controller drives the display panel at 48HZ, the 0X00 address of the memory reads data, and a corresponding required voltage value is obtained; when the time schedule controller drives the display panel at 90HZ, the 0X01 address of the memory reads data to obtain a corresponding required voltage value; when the timing controller drives the display panel at 120HZ, the data is read at the 0X02 address of the memory, and the corresponding desired voltage value is obtained.
Step S20: a voltage signal having a desired voltage value is applied to the shared electrode.
In a specific implementation, the voltage of the shared electrode is provided by the power management unit, and the time sequence controller transmits the information to the power management unit after determining the voltage value required by the shared electrode; the power management unit then supplies a voltage having the desired voltage value to the shared electrode.
In addition, in order to ensure the stability of display, when the refresh rate of the display panel is detected to be adjusted, determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode; determining a first difference between a required voltage value and a first voltage value corresponding to the shared electrode at the adjusted refresh rate; and compensating the voltage value of the first current voltage signal according to the first difference value.
It is understood that the first current voltage signal refers to a voltage signal applied to the common electrode before the refresh rate of the display panel is adjusted. For example, when the refresh rate of the display panel is adjusted to 120HZ such that 90HZ, the first voltage value is 9V, the desired voltage value is 8.7V, and the corresponding first difference value is 0.3V.
When compensating the voltage value of the current voltage signal, the voltage value is mainly adjusted. For example, when the first voltage value is greater than the required voltage value, the current voltage signal applied to the shared electrode is reduced by the amplitude corresponding to the first difference value; if the first voltage value is 9V and the required voltage value is 8.7V, the voltage value of the current voltage signal is reduced by 0.3V.
Or when the first voltage value is smaller than the required voltage value, the current voltage signal applied to the shared electrode is increased by the amplitude corresponding to the first difference value. If the refresh rate of the display panel is adjusted to 48HZ by 90HZ, the first voltage is 9V, the required voltage is 10V, and the corresponding first difference is 1V. At this time, the voltage value of the current voltage signal is increased by 1V.
In addition, in order to improve the accuracy of compensation, when determining the first voltage value corresponding to the first current voltage signal applied to the shared electrode, the voltage of the first current voltage signal applied to the shared electrode may be detected for multiple times at preset time intervals to obtain multiple voltage data; an average value of the voltage data is determined and used as a first voltage value. For example, the first current voltage signal of the shared electrode is detected in each frame time in three consecutive frames, and a corresponding voltage value is obtained. Of course, in consideration of the influence of the detection duration on the duration of the refresh rate adjustment, the specific detection times and detection intervals may be set according to the requirements, which is not limited in this embodiment. Meanwhile, in order to further ensure the accuracy of compensation, the voltage value of the voltage signal applied to the shared electrode can be detected for multiple times after compensation, and whether the voltage value is equal to the required voltage value or not can be judged.
In a specific implementation, the power management unit internally comprises a step-up and step-down circuit, and the output voltage value can be adjusted by adjusting the voltage conversion ratio of the step-up and step-down voltage. For the specific structure of the buck-boost circuit, a mature technology is already available, and this embodiment is not described here in detail.
In this embodiment, when the display panel displays a picture, the required voltage value of the shared electrode is determined according to the refresh rate of the display panel and a preset mapping relationship, where the preset mapping relationship includes a correspondence relationship between different refresh rates of the display panel and the required voltage value of the shared electrode under the same display brightness; and then a voltage signal with a required voltage value is applied to the shared electrode. According to the embodiment, the voltage of the shared electrode is adjusted, so that the leakage speed of the sub-pixel area of each pixel is adjusted, the display panel can maintain the same brightness under different refresh rates, and the display quality is improved.
Example III
Referring to fig. 4, fig. 4 is a flowchart illustrating a second embodiment of a driving method of a display panel according to the present invention. Based on the above-described first embodiment, a second embodiment of the display panel driving method of the present invention is proposed.
In this embodiment, step S10 may include:
step S101: and determining a target mapping relation from a preset mapping relation according to the display brightness of the display panel, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under different display brightness and the voltage value required by the shared electrode.
The voltage value required for the common electrode is opposite to the display brightness. In order to meet the requirements of users on different brightness, the corresponding relation between the refresh rate under different brightness and the voltage value required by the shared electrode needs to be set, so that each refresh rate of the display panel under different brightness can maintain a stable display effect. For example, when the brightness of the display panel is 90%, the required voltage value corresponding to the refresh rate 48HZ is 10V, the required voltage value corresponding to the refresh rate 90HZ is 9V, and the required voltage value corresponding to the refresh rate 120HZ is 8.7V; when the brightness of the display panel is 60%, the required voltage value corresponding to the refresh rate 48HZ is 8V, the required voltage value corresponding to the refresh rate 90HZ is 7V, and the required voltage value corresponding to the refresh rate 120HZ is 6.7V.
Correspondingly, the brightness of the display panel needs to be adjusted in the measurement stage, and the corresponding relation between each actual voltage value and each refresh rate under different brightness is obtained; and constructing a mapping relation according to the corresponding relation.
In specific implementation, the corresponding relation between the refresh rate and the actual voltage value of the display screen under all the optional brightness can be measured, and then the mapping relation is constructed according to the measurement result. Or selecting part of brightness to measure, and calculating the refresh rate and the actual voltage value under other brightness according to a fitting algorithm. For example, the corresponding relation between the refresh rate of the display panel at 30%, 60% and 90% and the actual voltage value is measured, and then the refresh rate and the actual voltage value at 20%, 50% and 70% of the brightness are obtained through a fitting algorithm; and then constructing a mapping relation according to the corresponding relation.
It can be understood that the preset mapping relationship includes a plurality of groups of mapping relationships between refresh rates and actual voltage values, and each group of mapping relationships is divided by brightness. For example, a mapping relation a corresponding to 30% luminance, a mapping relation B corresponding to 60% luminance, and a mapping relation C corresponding to 90% luminance. If the current display brightness is 90%, the target mapping relation is a mapping relation C.
Step S102: and determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and the target mapping relation.
After the corresponding mapping relation is determined, the corresponding required voltage is determined from the mapping relation according to the refresh rate. If the content of the mapping relation C is: when the display refresh rate is 48HZ, the required voltage value of the shared electrode may be 10V; when the display refresh rate is 90HZ, the required voltage value of the shared electrode may be 9V; when the display refresh rate is 120HZ, the desired voltage value for the shared electrode may be 8.7V. And when the current refresh rate is 90HZ, the required voltage value of the shared electrode is 9V.
In addition, in order to ensure the stability of display, when the brightness of the display panel is detected to be adjusted, determining a second voltage value corresponding to a second current voltage signal applied to the shared electrode; determining a second difference value between a required voltage value and a second voltage value corresponding to the adjusted brightness of the shared electrode; and compensating the voltage value of the second current voltage signal according to the second difference value.
It is understood that the second current voltage signal refers to a voltage signal applied to the common electrode before brightness adjustment of the display panel. For example, at a refresh rate of 90HZ, when the brightness of the display panel is adjusted to 60% by 90%, the second voltage value is 9V, the required voltage value is 7V, and the corresponding second difference is 2V. For the specific way of compensation, reference may be made to the first embodiment, and this embodiment will not be described herein.
Also, in order to improve the accuracy of the compensation, the voltage of the second current voltage signal applied to the shared electrode may be detected multiple times at preset time intervals when the second voltage value is determined. For example, the first current voltage signal of the shared electrode is detected in each frame time in three consecutive frames, and a corresponding voltage value is obtained. Of course, in consideration of the influence of the detection duration on the duration of the refresh rate adjustment, the specific detection times and detection intervals may be set according to the requirements, which is not limited in this embodiment. Meanwhile, in order to further ensure the accuracy of compensation, the voltage value of the voltage signal applied to the shared electrode can be detected for multiple times after compensation, and whether the voltage value is equal to the required voltage value or not can be judged.
In this embodiment, a target mapping relationship is determined from preset mapping relationships according to display brightness of the display panel, where the preset mapping relationships include correspondence relationships between different refresh rates of the display panel under different display brightness and voltage values required by the common electrode; and then determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and the target mapping relation. In the embodiment, the mapping relation corresponding to the brightness of the display panel is determined, and the voltage of the sharing electrode is adjusted according to the mapping relation, so that the leakage speed of the sub-pixel area of each pixel is adjusted, the display panel can maintain the same brightness under different refresh rates, and the display quality is improved.
Example IV
In addition, the embodiment of the invention also provides a driver. Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of a display panel driving apparatus according to the present invention.
In this embodiment, the driver is used for driving the display panel, and the structure of the display panel can be referred to the foregoing, and the driver includes:
the computing module 100 is configured to determine, when the display panel displays a picture, a required voltage value of the shared electrode according to a refresh rate of the display panel and a preset mapping relationship, where the preset mapping relationship includes a correspondence relationship between different refresh rates of the display panel and the required voltage value of the shared electrode.
And a power supply module 200 for applying a voltage signal having a desired voltage value to the common electrode.
In this embodiment, when the display panel displays a picture, the required voltage value of the shared electrode is determined according to the refresh rate of the display panel and a preset mapping relationship, where the preset mapping relationship includes a correspondence relationship between different refresh rates of the display panel and the required voltage value of the shared electrode under the same display brightness; and then a voltage signal with a required voltage value is applied to the shared electrode. According to the embodiment, the voltage of the shared electrode is adjusted, so that the leakage speed of the sub-pixel area of each pixel is adjusted, the display panel can maintain the same brightness under different refresh rates, and the display quality is improved.
In an embodiment, the power supply module 200 is further configured to determine a first voltage value corresponding to a first current voltage signal applied to the shared electrode when it is detected that the refresh rate of the display panel is adjusted; determining a first difference between a required voltage value and a first voltage value corresponding to the shared electrode at the adjusted refresh rate; and compensating the voltage value of the current voltage signal according to the first difference value.
In an embodiment, the power supply module 200 is further configured to reduce the current voltage signal applied to the shared electrode by an amplitude corresponding to the first difference when the current voltage value is greater than the required voltage value.
In an embodiment, the power supply module 200 is further configured to increase the current voltage signal applied to the shared electrode by an amplitude corresponding to the first difference when the current voltage value is smaller than the required voltage value.
In an embodiment, the computing module 100 is further configured to determine a target mapping relationship from preset mapping relationships according to display brightness of the display panel, where the preset mapping relationships include correspondence relationships between different refresh rates of the display panel under different display brightness and voltage values required by the common electrode; and determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and the target mapping relation.
In an embodiment, the power supply module 200 is further configured to determine a second voltage value corresponding to a second current voltage signal applied to the shared electrode when it is detected that the brightness of the display panel is adjusted; determining a second difference value between a required voltage value and a second voltage value corresponding to the adjusted brightness of the shared electrode;
and compensating the voltage value of the current voltage signal according to the second difference value.
In an embodiment, the driver further includes a measurement module for measuring an actual voltage value of the voltage signal applied to the common electrode when the display panel maintains the same brightness at different refresh rates; and constructing a mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
In an embodiment, the measurement module is further configured to adjust brightness of the display panel, and obtain a correspondence between each actual voltage value and each refresh rate at different brightness; and constructing a mapping relation according to the corresponding relation.
Other embodiments or specific implementation manners of the driver according to the present invention may refer to the above method embodiments, so at least have all the beneficial effects brought by the technical solutions of the above embodiments, which are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the terms first, second, third, etc. do not denote any order, but rather the terms first, second, third, etc. are used to interpret the terms as names.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. read only memory mirror (Read Only Memory image, ROM)/random access memory (Random Access Memory, RAM), magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. The display panel driving method includes a plurality of scan lines, a plurality of data lines and pixels distributed in an array, each pixel including a main pixel region and a sub pixel region, the main pixel region and the sub pixel region being connected with a same scan line and a same data line, the sub pixel region being further connected with a common electrode, the display panel driving method comprising:
when the display panel displays a picture, determining a required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode;
applying a voltage signal having the desired voltage value to the shared electrode;
the applying a voltage signal having the desired voltage value to the shared electrode includes:
when the refresh rate of the display panel is detected to be adjusted, determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode;
determining a first difference between a required voltage value corresponding to the shared electrode at the adjusted refresh rate and the first voltage value;
and compensating the voltage value of the first current voltage signal according to the first difference value.
2. The display panel driving method of claim 1, wherein compensating the voltage value of the first current voltage signal according to the first difference value comprises:
when the first voltage value is larger than the required voltage value, reducing the current voltage signal applied to the shared electrode by the amplitude corresponding to the first difference value;
and when the first voltage value is smaller than the required voltage value, increasing the current voltage signal applied to the shared electrode by the amplitude corresponding to the first difference value.
3. The display panel driving method of claim 1, wherein the determining a first voltage value corresponding to a first current voltage signal applied to the common electrode comprises:
detecting the voltage of the first current voltage signal applied to the shared electrode for multiple times according to a preset time interval to obtain multiple voltage data;
an average value of the voltage data is determined and taken as a first voltage value.
4. The display panel driving method according to any one of claims 1 to 3, wherein the determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and a preset mapping relation comprises:
determining a target mapping relation from preset mapping relations according to the display brightness of the display panel, wherein the preset mapping relations comprise corresponding relations between different refresh rates of the display panel under different display brightness and voltage values required by the sharing electrodes;
and determining the required voltage value of the shared electrode according to the current refresh rate of the display panel and the target mapping relation.
5. The display panel driving method of claim 4, wherein the applying a voltage signal having the desired voltage value to the common electrode comprises:
when the brightness of the display panel is detected to be adjusted, determining a second voltage value corresponding to a second current voltage signal applied to the shared electrode;
determining a second difference value between the second voltage value and a corresponding required voltage value of the shared electrode under the adjusted brightness;
and compensating the voltage value of the second current voltage signal according to the second difference value.
6. The display panel driving method according to any one of claims 1 to 3, wherein before determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relationship, further comprising:
measuring an actual voltage value of a voltage signal applied to the shared electrode when the display panel maintains the same brightness at different refresh rates;
and constructing a preset mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
7. The display panel driving method according to claim 6, wherein the constructing a preset mapping relationship according to the correspondence between each actual voltage value and each refresh rate comprises:
adjusting the brightness of the display panel to obtain the corresponding relation between each actual voltage value and each refresh rate under different brightness;
and constructing a preset mapping relation according to the corresponding relation.
8. A driver for driving a display panel including a plurality of scan lines, a plurality of data lines, and pixels arranged in an array, each of the pixels including a main pixel region and a sub-pixel region connected to the same scan line and the same data line, the sub-pixel region further connected to a common electrode, the driver comprising:
the computing module is used for determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping relation when the display panel displays pictures, wherein the preset mapping relation comprises the corresponding relation between different refresh rates of the display panel and the required voltage value of the shared electrode;
a power supply module for applying a voltage signal having the required voltage value to the shared electrode;
the power supply module is further used for determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode when the refresh rate of the display panel is detected to be adjusted;
determining a first difference between a required voltage value corresponding to the shared electrode at the adjusted refresh rate and the first voltage value;
and compensating the voltage value of the first current voltage signal according to the first difference value.
9. A display device comprising a driver and a display panel, the driver being provided in an inactive display area of the display panel, wherein the driver is the driver of claim 8.
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