CN114299891A - Display panel driving method, driver and display device - Google Patents
Display panel driving method, driver and display device Download PDFInfo
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- CN114299891A CN114299891A CN202111592757.0A CN202111592757A CN114299891A CN 114299891 A CN114299891 A CN 114299891A CN 202111592757 A CN202111592757 A CN 202111592757A CN 114299891 A CN114299891 A CN 114299891A
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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 a display panel displays a picture, determining a required voltage value of a shared electrode according to a refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises corresponding relations 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 are provided with a variable refresh rate. For example, the refresh rate of a 120Hz display may vary from 48Hz to 120 Hz. When the refresh rate is changed from 120HZ to 48HZ, the 48HZ one frame time becomes long. In the multi-domain pixel structure, due to the existence of the shared electrode, after one frame time is prolonged, the pixel voltage is lowered in potential due to leakage, so that the brightness is reduced, and the display quality is affected.
Disclosure of Invention
The present invention provides a display panel driving method, a driver and a display device, and aims to solve the technical problem that the display device with a multi-domain pixel structure in the prior art is prone to display brightness instability when the refresh rate is adjusted.
In order to achieve the above object, the present invention provides a display panel driving method, where the display panel includes a plurality of scan lines, a plurality of data lines, and pixels distributed in an array, each pixel includes a main pixel region and a sub-pixel region, the main pixel region and the sub-pixel region are connected to a same scan line and a same data line, and the sub-pixel region is further connected to a common electrode, the display panel driving method including:
when a display panel displays a picture, determining a required voltage value of a shared electrode according to a refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises corresponding relations 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 with a desired voltage value to the shared electrode includes:
when the adjustment of the refresh rate of the display panel is detected, determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode;
determining a first difference value between a corresponding required voltage value of the shared electrode at the adjusted refresh rate and a first voltage value;
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.
Optionally, determining a first voltage value corresponding to a 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 the average value is taken as a first voltage value.
Optionally, determining a required voltage value of the shared electrode according to the current refresh rate of the display panel and a preset mapping relationship, includes:
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 corresponding relations between different refresh rates of the display panel under different display brightness and voltage values required by a shared 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 with 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 the corresponding required voltage value and a second 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.
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 under different refresh rates;
and constructing a mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
Optionally, constructing a mapping relationship according to a 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, to achieve the above object, the present invention further provides a driver for driving a display panel, the display panel includes a plurality of scan lines, a plurality of data lines, and pixels arranged in an array, each pixel includes a main pixel region and a sub-pixel region, the main pixel region and the sub-pixel region are connected to a same scan line and a same data line, the sub-pixel region is further connected to a common electrode, and the driver includes:
the calculating 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 a picture, 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 the power supply module is used for applying a voltage signal with a required voltage value to the shared electrode.
In addition, in order to achieve the above object, the present invention further provides a display device, which includes a driver and a display panel, wherein the driver is disposed in the non-effective display area of the display panel, and the driver is the above driver.
When a display panel displays a picture, determining a required voltage value of a shared electrode according to a refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises corresponding relations between different refresh rates of the display panel under the same display brightness and the required voltage value of the shared electrode; and then applying a voltage signal with a required voltage value 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 structural diagram of a display device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a pixel according to an embodiment of 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 second embodiment of a display panel driving method according to the present invention;
fig. 5 is a block diagram of a display panel driving apparatus according to a first embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
203 | |
| 101 | |
2031 | |
| 102 | |
2032 | |
| 103 | Drive 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 implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device of a hardware operating 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, and the driver is disposed in a non-effective display area of the display panel. The display panel 20 includes a plurality of scan lines 201, a plurality of data lines 202, and pixels 203 arranged in an array in a display area. 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 and a gate controller, where the source controller is configured to input a data signal to the data line 202 to enable a corresponding pixel to display; the gate controller is used for inputting scanning signals to the scanning lines 201 to correspondingly turn on. The timing controller 101 may be provided therein with a processor, and the processor calls the display panel driving program stored in the memory 104 and executes the display panel driving method according to the embodiment of the present invention. The Memory 104 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 104 may also be a storage device separate from the processor 1001.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a pixel according to an embodiment of the invention.
As shown in fig. 2, the pixel 203 includes a main pixel area 2031 and a sub-pixel area 2032, the main pixel area 2031 and the sub-pixel area 2032 are connected to the same scan line 201 and the same data line 202, and the sub-pixel area 2032 is further connected to the common electrode 204. Wherein the main pixel region 1031 includes a first thin film transistor M1, a first pixel capacitance Clc1, and a first storage capacitance Cst 1; 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 architecture, and the main pixel region 2031 and the sub-pixel region 2032 input the same data voltage, but since the sub-pixel region 2032 may be divided by the shared electrode 204, the voltages of the pixel capacitances 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 to be provided with four liquid crystal cells oriented such 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 numbers, 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 provided.
Referring to fig. 3, fig. 3 is a flowchart illustrating a display panel driving method according to a first embodiment of 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 following steps:
step S10: when the display panel displays a picture, 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.
It should be understood that the execution subject 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 operation, and the like.
It should be noted that, for the multi-domain pixel architecture, the sub-pixel region in each pixel is connected to the common 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 common electrode. Generally speaking, the higher the voltage of the common electrode is, the higher the display brightness of the sub-pixel area is.
In the embodiment, the display panel has uniform display brightness under different refresh rates, and different voltages are applied to the shared electrode when the display panel works under different refresh rates, so that the brightness of the sub-pixel area is adjusted. The required voltage value of the common electrode is the voltage value on the common electrode when the display panel maintains a brightness.
Therefore, the required voltage value also needs to be measured before driving. That is, the actual voltage value of the voltage signal applied to the common electrode when the display panel maintains the same brightness at different refresh rates 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 common electrode is adjusted to maintain the display panel at the same brightness. At this time, the actual voltage of the common electrode is the required voltage value of the common 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 required voltage value of the shared electrode may be 8.7V.
It should be noted that the preset mapping relationship may be pre-stored in the memory, and the timing controller reads the preset mapping relationship from the memory when driving the display panel, and determines the required voltage value of the corresponding shared electrode according to the current refresh rate.
In specific implementation, the voltage data corresponding to different refresh rates can be stored in different addresses of the memory, and the corresponding required voltage values can be obtained through addressing. For example, 10V voltage data for a display refresh rate of 48HZ is stored at 0X00 address; storing the voltage data 9V for which the display refresh rate is 90HZ at an address of 0X 01; the voltage data 8.7V for which the display refresh rate is 120HZ is stored at the address 0X 03. When the timing controller drives the display panel at 48HZ, the data is read at the address 0X00 of the memory, and the corresponding required voltage value is obtained; when the timing controller drives the display panel at 90HZ, the data is read at 0X01 address of the memory, and the corresponding required voltage value is obtained; when the timing controller drives the display panel at 120HZ, the data is read at the address 0X02 of the memory, and the corresponding required voltage value is obtained.
Step S20: a voltage signal having a desired voltage value is applied to the shared electrode.
In specific implementation, the voltage of the shared electrode is provided by the power management unit, and the time schedule controller transmits the information to the power management unit after determining the voltage value required by the shared electrode; the power management unit provides the voltage with the required voltage value to the shared electrode.
In addition, in order to ensure the stability of the display, when the adjustment of the refresh rate of the display panel is detected, a first voltage value corresponding to a first current voltage signal applied to the shared electrode is determined; determining a first difference value between a corresponding required voltage value of the shared electrode at the adjusted refresh rate and a first voltage value; 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 by 90HZ, the first voltage value is 9V, the required 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 adjustment of the voltage value is mainly performed. For example, when the first voltage value is larger than the required voltage value, the current voltage signal applied to the shared electrode is reduced by the amplitude corresponding to the first difference; 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, increasing the current voltage signal applied to the shared electrode by the amplitude corresponding to the first difference. If the first voltage value is 9V and the required voltage value is 10V when the refresh rate of the display panel is adjusted to 48HZ by 90HZ, the corresponding first difference value is 1V. 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 multiple times at preset time intervals to obtain multiple voltage data; an average value of the voltage data is determined and the average value is taken as the 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 the detection intervals may be set according to requirements, and this embodiment is not limited thereto. 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 specific implementation, the power management unit includes a buck-boost circuit therein, and the output voltage value can be adjusted by adjusting the voltage conversion ratio of the buck-boost voltage. As for the specific structure of the buck-boost circuit, a mature technology exists, and this embodiment is not described herein.
In this embodiment, when a display panel displays a picture, a required voltage value of a shared electrode is determined according to a refresh rate of the display panel and a preset mapping relation, where the preset mapping relation includes a correspondence between different refresh rates of the display panel at the same display brightness and the required voltage value of the shared electrode; and then applying a voltage signal with a required voltage value to the shared electrode. In the embodiment, the voltage of the shared electrode is adjusted, and the leakage speed of the sub-pixel area of each pixel is adjusted, so that 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 display panel driving method according to a second embodiment of the present invention. Based on the first embodiment, a second embodiment of the driving method of the display panel according to the present invention is provided.
In this embodiment, step S10 may include:
step S101: and 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 shared electrode.
The voltage value required for the common electrode is opposite to the display luminance. In order to meet the requirements of users on different brightness, the corresponding relationship between the refresh rate under different brightness and the voltage value required by the shared electrode needs to be set, so that the display panel can maintain stable display effect at each refresh rate under different brightness. 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 display panel brightness is 60%, the required voltage value 8V corresponding to the refresh rate 48HZ, the required voltage value 7V corresponding to the refresh rate 90HZ, and the required voltage value 6.7V corresponding to the refresh rate 120 HZ.
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 relationship between the refresh rate and the actual voltage value of the display screen under all selectable brightnesses can be measured, and then a mapping relationship is constructed according to the measurement result. Or, selecting partial 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 under 30%, 60% and 90% and the actual voltage value is measured, and then the refresh rate and the actual voltage value under the brightness of 20%, 50% and 70% 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 mapping relationships between the refresh rate and the actual voltage value, and each mapping relationship is divided by using the brightness. For example, the mapping relationship a corresponds to 30% luminance, the mapping relationship B corresponds to 60% luminance, and the mapping relationship C corresponds to 90% luminance. If the current display brightness is 90%, the target mapping relationship is the mapping relationship 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.
And after the corresponding mapping relation is determined, determining the corresponding required voltage 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 required voltage value of 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 the display, when the brightness of the display panel is detected to be adjusted, a second voltage value corresponding to a second current voltage signal applied to the shared electrode is determined; determining a second difference value between the corresponding required voltage value and a second 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.
It is understood that the second current voltage signal refers to a voltage signal applied to the common electrode before the brightness of the display panel is adjusted. For example, when the brightness of the display panel is adjusted to 60% by 90% at a refresh rate of 90HZ, the second voltage value is 9V, the required voltage value is 7V, and the corresponding second difference value is 2V. For the specific compensation manner, reference may be made to the first embodiment, and this implementation manner is not described herein again.
Also, in order to improve the accuracy of the compensation, the voltage of the second present voltage signal applied to the shared electrode may be detected a plurality of times at preset time intervals when determining the second 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 the detection intervals may be set according to requirements, and this embodiment is not limited thereto. 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 the embodiment, a target mapping relationship is determined from a preset mapping relationship according to the display brightness of the display panel, where the preset mapping relationship includes a corresponding relationship between different refresh rates of the display panel at different display brightness and a voltage value required by the shared 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. According to the embodiment, the mapping relation corresponding to the brightness of the display panel is determined, the voltage of the shared electrode is adjusted according to the mapping relation, 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 four
In addition, the embodiment of the invention also provides a driver. Referring to fig. 5, fig. 5 is a block diagram of a display panel driving device according to a first embodiment of 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 calculating module 100 is configured to determine a required voltage value of the shared electrode according to a refresh rate of the display panel and a preset mapping relationship when the display panel displays a picture, where the preset mapping relationship includes a correspondence 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 with a required voltage value to the shared electrode.
In this embodiment, when a display panel displays a picture, a required voltage value of a shared electrode is determined according to a refresh rate of the display panel and a preset mapping relation, where the preset mapping relation includes a correspondence between different refresh rates of the display panel at the same display brightness and the required voltage value of the shared electrode; and then applying a voltage signal with a required voltage value to the shared electrode. In the embodiment, the voltage of the shared electrode is adjusted, and the leakage speed of the sub-pixel area of each pixel is adjusted, so that 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 detecting that the refresh rate of the display panel is adjusted; determining a first difference value between a corresponding required voltage value of the shared electrode at the adjusted refresh rate and a first voltage value; and compensating the voltage value of the current voltage signal according to the first difference.
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 calculating module 100 is further configured to determine a target mapping relationship from a preset mapping relationship according to the display brightness of the display panel, where the preset mapping relationship includes a corresponding relationship between different refresh rates of the display panel at different display brightness and a voltage value 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 common electrode when it is detected that the brightness of the display panel is adjusted; determining a second difference value between the corresponding required voltage value and a second voltage value of the shared electrode under the adjusted brightness;
and compensating the voltage value of the current voltage signal according to the second difference value.
In one embodiment, the driver further comprises a measuring module, wherein the measuring module is used for measuring the actual voltage value of the voltage signal applied to the common electrode when the display panel maintains the same brightness under 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 measuring module is further configured to adjust the brightness of the display panel to obtain a corresponding relationship 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 implementations of the driver according to the present invention may refer to the above-mentioned method embodiments, so that at least all the advantages brought by the technical solutions of the above-mentioned embodiments are provided, and details are not described herein.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits 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 words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, an optical disk), and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A display panel driving method is disclosed, wherein the display panel comprises a plurality of scanning lines, a plurality of data lines and pixels distributed in an array, each pixel comprises a main pixel area and a sub-pixel area, the main pixel area and the sub-pixel area are connected with the same scanning line and the same data line, and the sub-pixel area is also connected with a shared electrode, the display panel driving method comprises the following steps:
when the display panel displays a picture, determining a required voltage value of the shared electrode according to a refresh rate of the display panel and a preset mapping relation, wherein the preset mapping relation comprises corresponding relations 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.
2. The display panel driving method according to claim 1, wherein the applying a voltage signal having the desired voltage value to the common electrode comprises:
when the adjustment of the refresh rate of the display panel is detected, determining a first voltage value corresponding to a first current voltage signal applied to the shared electrode;
determining a first difference between a corresponding required voltage value of 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.
3. The display panel driving method according to claim 2, wherein the compensating the voltage value of the first present 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.
4. The method for driving a display panel according to claim 2, 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;
and determining an average value of the voltage data, and taking the average value as a first voltage value.
5. The display panel driving method according to any one of claims 1 to 4, 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 shared 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.
6. The display panel driving method according to claim 5, wherein the applying a voltage signal having the desired voltage value to the common 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 the corresponding required voltage value of the shared electrode under the adjusted brightness and the second voltage value;
and compensating the voltage value of the second current voltage signal according to the second difference value.
7. The display panel driving method according to any one of claims 1 to 4, wherein before determining the required voltage value of the shared electrode according to the refresh rate of the display panel and a preset mapping, further comprising:
measuring the actual voltage value of the voltage signal applied to the shared electrode when the display panel maintains the same brightness under different refresh rates;
and constructing a preset mapping relation according to the corresponding relation between each actual voltage value and each refresh rate.
8. The method for driving a display panel according to claim 7, wherein the constructing the preset mapping relationship according to the correspondence between the actual voltage values and the refresh rates 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.
9. A driver is used for driving a display panel, the display panel comprises a plurality of scanning lines, a plurality of data lines and pixels distributed in an array, each pixel comprises a main pixel area and a sub-pixel area, the main pixel area and the sub-pixel area are connected with the same scanning line and the same data line, and the sub-pixel area is also connected with a shared electrode, and the driver is characterized by comprising:
the calculation 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 a picture, 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 the power supply module is used for applying a voltage signal with the required voltage value to the shared electrode.
10. A display device comprising a driver and a display panel, wherein the driver is disposed in an inactive display area of the display panel, and wherein the driver is the driver according to claim 9.
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