CN113793569A - Control method, device and equipment of display panel and storage medium - Google Patents
Control method, device and equipment of display panel and storage medium Download PDFInfo
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- CN113793569A CN113793569A CN202111257694.3A CN202111257694A CN113793569A CN 113793569 A CN113793569 A CN 113793569A CN 202111257694 A CN202111257694 A CN 202111257694A CN 113793569 A CN113793569 A CN 113793569A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The disclosure provides a control method, a control device, control equipment and a storage medium of a display panel, and belongs to the technical field of display. The method comprises the following steps: determining a first light emission long duty cycle; determining a second light-emitting duration duty ratio of the target hold frame according to the first light-emitting duration duty ratio, the first refresh rate and the first display brightness; and controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio. Due to the panel characteristic difference of the display panel, the luminance of the refresh frame and the luminance of the sustain frame corresponding to the long duty ratio at the first light emission time may not be the same. And controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio, and adjusting the first light-emitting duration duty ratio of the target holding frame, so as to adjust the brightness difference between the target holding frame and the refresh frame and further improve the flicker problem of the display panel.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling a display panel.
Background
For an AMOLED (Active-matrix organic light-emitting diode) display product, in order to reduce power consumption of the product, a high refresh rate and a low refresh rate alternate display function may be adopted. In the low frequency driving mode, a frame of display is displayed in a refresh frame and a plurality of sustain frames.
In the related art, a light-emitting control signal of a first light-emitting duration duty ratio is used to control the display panel to emit light, and the first light-emitting duration duty ratio is a ratio of a light-emitting duration corresponding to a refresh frame at a first display brightness of the display panel to a frame duration.
Due to the panel characteristic difference of the display panel, the luminance of the refresh frame and the luminance of the sustain frame may not be the same under the light emission control signal of the long duty ratio at the first light emission. The difference in brightness between the refresh frame and the sustain frame can cause the display panel to have a flicker problem.
Disclosure of Invention
The embodiment of the disclosure provides a control method, a control device, control equipment and a control medium of a display panel, which can improve the flicker problem of the display panel. The technical scheme is as follows:
in a first aspect, a method for controlling a display panel is provided, the method including: determining a first light-emitting duration duty ratio, wherein the first light-emitting duration duty ratio is the ratio of the light-emitting duration corresponding to the refresh frame at the first display brightness of the display panel to the frame duration; determining a second light-emitting duration duty ratio of a target holding frame according to the first light-emitting duration duty ratio, a first refresh rate and the first display brightness, wherein the refresh frame and the target holding frame correspond to the same frame, the greater the brightness difference between the refresh frame and the target holding frame when the refresh frame and the target holding frame emit light at the first light-emitting duration duty ratio, the greater the difference between the second light-emitting duration duty ratio and the first light-emitting duration duty ratio, the smaller the brightness difference, and the smaller the difference between the second light-emitting duration duty ratio and the first light-emitting duration duty ratio; and controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio.
Optionally, the determining a second light-emitting duration duty cycle of the target retention frame according to the first light-emitting duration, the first refresh rate, and the first display brightness includes: determining a compensation value of the target retention frame according to the first refresh rate and the first display brightness; and compensating the first light-emitting duration duty ratio by using the compensation value of the target hold frame to obtain a second light-emitting duration duty ratio.
Optionally, the determining a compensation value of the target retention frame according to the first refresh rate and the first display brightness includes: determining a corresponding target mapping relation of the display panel under the first refresh rate, wherein the target mapping relation is a mapping relation between display brightness and a compensation value; and determining a compensation value of the target keeping frame according to the first display brightness and the target mapping relation.
Optionally, the compensating the first light-emitting duration duty cycle according to the compensation value of the target hold frame to obtain the second light-emitting duration duty cycle includes: and taking the sum of the first light-emitting duration duty ratio and the compensation value as a second light-emitting duration duty ratio of the target hold frame.
Optionally, the method further comprises: determining a plurality of refresh rate test values for the display panel; determining a plurality of display brightness test values corresponding to each refresh rate test value and a compensation value of a retention frame corresponding to each display brightness test value; and generating a mapping relation between the display brightness corresponding to each refresh rate test value and the compensation value according to the plurality of display brightness test values and the compensation value of the retention frame corresponding to each display brightness test value.
In a second aspect, there is provided a control apparatus of a display panel, the apparatus comprising: the first determining module is used for determining a first luminous duration duty ratio, wherein the first luminous duration duty ratio is the ratio of the luminous duration corresponding to the refresh frame at the first display brightness of the display panel to the frame duration; a second determining module, configured to determine a second light-emitting duration duty cycle of a target hold frame according to the first light-emitting duration duty cycle, a first refresh rate, and the first display brightness, where the refresh frame and the target hold frame correspond to a same frame, and a difference between brightness when the refresh frame and the target hold frame emit light at the first light-emitting duration duty cycle is larger, a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is larger, the difference between the brightness difference is smaller, and a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is smaller; and the control module is used for controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio.
Optionally, the second determining module is configured to determine a compensation value of the target retention frame according to the first refresh rate and the first display brightness; and compensating the first light-emitting duration duty ratio by using the compensation value of the target hold frame to obtain a second light-emitting duration duty ratio.
Optionally, the second determining module is configured to determine a target mapping relationship corresponding to the display panel at the first refresh rate, where the target mapping relationship is a mapping relationship between display brightness and a compensation value; and determining a compensation value of the target keeping frame according to the first display brightness and the target mapping relation.
Optionally, the second determining module is configured to use a sum of the first light-emitting duration duty cycle and the compensation value as a second light-emitting duration duty cycle of the target hold frame.
Optionally, the apparatus further comprises a mapping relation generating module, configured to determine a plurality of refresh rate test values of the display panel; determining a plurality of display brightness test values corresponding to each refresh rate test value and a compensation value of a retention frame corresponding to each display brightness test value; and generating a mapping relation between the display brightness corresponding to each refresh rate test value and the compensation value according to the plurality of display brightness test values and the compensation value of the retention frame corresponding to each display brightness test value.
In a third aspect, a computer device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the first aspect.
In a fourth aspect, a computer-readable medium is provided, in which instructions, when executed by a processor of a computer device, enable the computer device to perform the method of the first aspect.
In a fifth aspect, there is provided a computer program product comprising computer programs/instructions, characterized in that the computer programs/instructions, when executed by a processor, implement the method of the first aspect.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
in the embodiment of the disclosure, a first light-emitting long duty cycle is determined; determining a second light-emitting duration duty ratio of the target hold frame according to the first light-emitting duration duty ratio, the first refresh rate and the first display brightness; and controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio. The larger the difference between the brightness of the refresh frame and the brightness of the target hold frame when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the larger the difference between the second light emission time length duty ratio and the first light emission time length duty ratio; the smaller the difference in luminance when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the smaller the difference between the second light emission time length duty ratio and the first light emission time length duty ratio. Due to the panel characteristic difference of the display panel, the luminance of the refresh frame and the luminance of the sustain frame corresponding to the long duty ratio at the first light emission time may not be the same. And controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio, and adjusting the first light-emitting duration duty ratio of the target holding frame, so as to adjust the brightness difference between the target holding frame and the refresh frame and further improve the flicker problem of the display panel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a control method of a display panel according to an embodiment of the present disclosure;
fig. 2 is a flowchart of another control method for a display panel according to an embodiment of the disclosure;
fig. 3 is a flowchart of a method for determining a mapping relationship between different display luminances and compensation values at different refresh rates according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of the luminance of the refresh frame and the luminance of the hold frame corresponding to the long duty ratio in the first light emitting provided by the embodiment of the disclosure;
fig. 5 is a schematic diagram of the brightness of the refresh frame and the brightness of the hold frame corresponding to the duty ratio of the second light-emitting duration provided by the embodiment of the disclosure;
fig. 6 is a block diagram of a control device of a display panel according to an embodiment of the present disclosure;
fig. 7 is a block diagram of a computer device according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
For the convenience of understanding the embodiments of the present disclosure, the related terms will be briefly described below.
In the embodiment of the present disclosure, the display panel has two driving modes. The display device comprises a first driving mode and a second driving mode, wherein the refresh rate (also called display frequency) of the first driving mode is lower than that of the second driving mode. The first driving mode may be referred to as a low frequency driving mode, and the second driving mode may be referred to as a high frequency driving mode.
In the low frequency driving mode, one display frame includes one refresh frame (also called a write frame) and at least one hold frame. In this driving mode, the display panel refreshes the display data in the refresh frame, and holds the display data refreshed in the refresh frame in the hold frame.
In the high frequency driving mode, one display frame includes one refresh frame and does not include the hold frame. In the driving mode, the display panel refreshes display data in a refresh frame.
Light emission control signal: the light emission control signal is generally a high-low level signal. By controlling the duty ratio of the light emission control signal, the light emission duration duty ratio of each frame can be controlled. Illustratively, the display panel emits light when the light emission control signal is at a low level. When the light emission control signal is at a high level, the display panel does not emit light. By controlling the duration of the low level of the light-emitting control signal, the light-emitting duration of the display panel can be controlled when displaying a frame of picture.
Brightness intensity: the brightness intensity refers to the brightness of the corresponding display panel when the light-emitting control signal is at a low level.
Brightness: the product of the intensity of the luminance and the light emission time period.
Fig. 1 is a flowchart of a control method of a display panel according to an embodiment of the present disclosure. The method may be performed by a Controller, e.g., a Controller of an AMOLED display panel, e.g., a Tcon (Timer Controller). Referring to fig. 1, the method includes:
in step 101, a first light emission long duty cycle is determined.
The first light-emitting duration duty ratio is a ratio of a light-emitting duration corresponding to the refresh frame at a first display brightness of the display panel to a frame duration. The first display brightness is the current display brightness of the display panel. The frame duration refers to the duration of a frame refresh frame or a frame hold frame, and the frame durations of the refresh frame and the hold frame are the same.
Illustratively, the first light emission long duty ratio is a duty ratio of a light emission control signal corresponding to the display panel at the first display luminance.
In step 102, a second light-emitting duration duty ratio of the target holding frame is determined according to the first light-emitting duration duty ratio, the first refresh rate, and the first display luminance.
The first refresh rate refers to a refresh rate of the display panel in the low frequency driving mode.
The refresh frame and the target hold frame correspond to the same frame picture. The target hold frame is any one of a plurality of hold frames corresponding to the same frame picture. The larger the difference between the luminance of the refresh frame and the luminance of the target hold frame when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the larger the difference between the second light emission time length duty ratio and the first light emission time length duty ratio, the smaller the difference between the luminance and the second light emission time length duty ratio and the first light emission time length duty ratio.
In step 103, the display panel is controlled to emit light at the target sustain frame according to the second light emission period duty ratio.
In the embodiment of the disclosure, a first light-emitting long duty cycle is determined; determining a second light-emitting duration duty ratio of the target hold frame according to the first light-emitting duration duty ratio, the first refresh rate and the first display brightness; and controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio. The larger the difference between the brightness of the refresh frame and the brightness of the target hold frame when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the larger the difference between the second light emission time length duty ratio and the first light emission time length duty ratio; the smaller the difference in luminance when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the smaller the difference between the second light emission time length duty ratio and the first light emission time length duty ratio. Due to the panel characteristic difference of the display panel, the luminance of the refresh frame and the luminance of the sustain frame corresponding to the long duty ratio at the first light emission time may not be the same. And controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio, and adjusting the first light-emitting duration duty ratio of the target holding frame, so as to adjust the brightness difference between the target holding frame and the refresh frame and further improve the flicker problem of the display panel.
Fig. 2 is a flowchart of a control method of a display panel according to an embodiment of the present disclosure. The method may be performed by a Controller, e.g., a Controller of an AMOLED display panel, e.g., a Tcon (Timer Controller). Referring to fig. 2, the method includes:
in step 201, a first refresh rate and a first display brightness of a display panel are determined.
The refresh rate refers to the number of times the data is refreshed within one second of the display panel. The first refresh rate refers to a refresh rate of the display panel in the low frequency driving mode. The first refresh rate may be different for different display panels. In some embodiments, the memory unit of the controller stores therein a refresh rate of the display panel in the low frequency driving mode. The controller may retrieve a first refresh rate from the memory cells.
The display luminance refers to the luminance of the display panel display screen. The first display brightness refers to the current display brightness of the display panel. The display brightness of the display panel can be controlled by the brightness bars of the display panel. When the brightness control key is positioned at different positions of the brightness bar, the brightness of the display panel is different. In some embodiments, the storage unit of the controller stores a corresponding relationship between the position of the brightness bar of the display panel and the display brightness. The controller can determine the current display brightness corresponding to the brightness bar position of the display panel according to the corresponding relation.
In step 202, a first light emission long duty cycle is determined.
The first light-emitting duration duty ratio is a ratio of a light-emitting duration corresponding to the refresh frame at a first display brightness of the display panel to a frame duration. The related content of the frame duration is referred to the aforementioned step 101, and the detailed description is omitted here.
In some embodiments, the controller stores a mapping relationship between the display brightness and the duty ratio of the light emitting duration. The controller can determine a first light-emitting duration duty ratio corresponding to the first display brightness according to the first display brightness and the mapping relation between the display brightness and the light-emitting duration duty ratio.
In step 203, a compensation value for the target retention frame is determined based on the first refresh rate and the first display brightness.
In some embodiments, step 203 comprises:
firstly, determining a corresponding target mapping relation of the display panel under a first refresh rate.
The target mapping relationship is a mapping relationship between the display brightness and the compensation value.
In some embodiments, the storage unit of the controller stores in advance mapping relationships corresponding to a plurality of refresh rates, and each refresh rate corresponds to one mapping relationship. The mapping relationship is a mapping relationship between the display brightness and the compensation value. The mapping relationship comprises a display brightness and compensation values of a plurality of holding frames corresponding to the display brightness. The compensation values for the plurality of retention frames may be the same or different. In some examples, the luminance differences between the plurality of retention frames and the refresh frame are all the same, and the compensation values for the plurality of retention frames are all the same. In other examples, the luminance differences between the plurality of hold frames and the refresh frame are different, and the compensation values for the plurality of hold frames are different. According to the first refresh rate, a target mapping relation corresponding to the first refresh rate can be determined.
And secondly, determining a compensation value of the target keeping frame according to the mapping relation between the first display brightness and the target.
And the controller searches the compensation value of the target holding frame corresponding to the first display brightness from the target mapping relation according to the obtained first display brightness.
In step 204, the compensation value of the target hold frame is used to compensate the first light emitting duration duty cycle to obtain a second light emitting duration duty cycle.
The larger the difference between the brightness of the refresh frame and the brightness of the target hold frame when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the larger the difference between the second light emission time length duty ratio and the first light emission time length duty ratio; the smaller the difference in luminance when the refresh frame and the target hold frame emit light at the first light emission time length duty ratio, the smaller the difference between the second light emission time length duty ratio and the first light emission time length duty ratio.
In some embodiments, step 204 comprises: and taking the sum of the first light-emitting duration duty ratio of the target holding frame and the compensation value of the target holding frame as a second light-emitting duration duty ratio of the target holding frame.
Illustratively, when the brightness of the refresh frame is less than the brightness of the target hold frame, the compensation value is a negative value. In this way, after the first light-emitting duration duty cycle of the target hold frame is compensated, the obtained second light-emitting duration duty cycle of the target hold frame is smaller than the first light-emitting duration duty cycle of the target hold frame, and the brightness corresponding to the second light-emitting duration duty cycle of the target hold frame is smaller than the brightness corresponding to the first light-emitting duration duty cycle of the target hold frame. That is, when the luminance of the refresh frame is less than the luminance of the target hold frame, the light emission time period of the target hold frame is reduced by reducing the first light emission duty ratio of the target hold frame, thereby reducing the luminance of the target hold frame, and further reducing the luminance difference between the target hold frame and the refresh frame.
When the brightness of the refresh frame is greater than that of the target hold frame, the compensation value is a positive value. In this way, after the first light-emitting duration duty cycle of the target hold frame is compensated, the obtained second light-emitting duration duty cycle is larger than the first light-emitting duration duty cycle, and the brightness corresponding to the second light-emitting duration duty cycle of the target hold frame is larger than the brightness corresponding to the first light-emitting duration duty cycle of the target hold frame. That is, when the luminance of the refresh frame is greater than the luminance of the target hold frame, the light emission time period of the target hold frame is increased by increasing the first light emission duty ratio of the target hold frame, thereby increasing the luminance of the target hold frame and further reducing the luminance difference between the target hold frame and the refresh frame.
In step 205, the display panel is controlled to emit light at the target sustain frame according to the second light emission period duty ratio.
In some embodiments, the controller adjusts a first light emission time duty ratio corresponding to the target sustain frame in the light emission control signal to a second light emission time duty ratio, and controls the display panel to emit light using the adjusted light emission control signal.
In the embodiment of the present disclosure, due to the difference in panel characteristics, the luminance difference between the target hold frame and the refresh frame is different at different refresh rates and different display luminances. According to the mapping relation between the display brightness and the compensation value corresponding to different refresh rates, the compensation value of the target holding frame is determined, the first luminous time-length duty ratio of the target holding frame can be adjusted, the brightness difference between the target holding frame and the refresh frame is reduced, and therefore the flicker problem of the display panel is improved.
Fig. 3 is a flowchart of a method for determining a mapping relationship between different display luminances and compensation values at different refresh rates according to an embodiment of the present disclosure. As shown in fig. 3, the method includes:
in step 301, a plurality of refresh rate test values for a display panel are determined.
The refresh rate test value is a plurality of first refresh rates in the low frequency driving mode. The first refresh rate for the same display panel setting is fixed, and the first refresh rate for different display panel settings may be different. The different first refresh rates also have different degrees of influence on the flicker problem of the display panel. Therefore, in the embodiment of the present disclosure, it is necessary to determine the mapping relationship between the display brightness and the compensation value at a plurality of refresh rate test values. Then, the controller specifically determines the first refresh rate set by the current display panel.
A plurality of refresh rate test values are set as needed by the skilled person and then stored in the controller of the display panel. Illustratively, the display panel corresponds to a low refresh rate in the low frequency driving mode in the range of 1Hz to 60 Hz. Multiple refresh rate test values may be set at 1Hz intervals.
In step 302, a plurality of display luminance test values corresponding to each refresh rate test value and a compensation value of a retention frame corresponding to each display luminance test value are determined.
The number and value of the displayed brightness test values are set by the relevant technicians according to actual needs. The numerical values and the number of the plurality of display brightness test values corresponding to each refresh rate test value are the same. Illustratively, the display luminance test values are 10, and the luminances of the 10 display luminance test values are 50nit, 100nit, 150nit, 200nit, 250nit, 300nit, 350nit, 400nit, 450nit, and 500nit, respectively.
The number of the corresponding retention frames of each refresh rate test value is different. The periods of the refresh frame and the retention frame are fixed, the number of the retention frames corresponding to a larger refresh rate is small, and the number of the retention frames corresponding to a smaller refresh rate is large. Illustratively, in the low-frequency driving mode, the number of the holding frames corresponding to the refresh rate of 1Hz is 59, and the number of the holding frames corresponding to the refresh rate of 10Hz is 5.
In some embodiments, determining the compensation value for the retention frame for each display luminance test value comprises:
the first step is to determine the brightness of the refresh frame and the brightness of a plurality of hold frames corresponding to each display brightness test value.
In some examples, a correlation technician may test the brightness of a refresh frame and the brightness of a plurality of retention frames through a photo probe.
Fig. 4 is a schematic diagram of the luminance of the refresh frame and the luminance of the hold frame corresponding to the long duty ratio in the first light emission provided by the embodiment of the present disclosure. Referring to fig. 4, a signal labeled 1 represents a synchronization signal between the controller and the host, a frequency of the signal 1 represents a refresh rate (or a display frequency) of the display panel, and a rising edge of the signal 1 is a starting point of a refresh frame. A signal denoted by 2 represents a light emission control signal. The signal labeled 3 represents the brightness intensity of the refresh frame and the hold frame.
The brightness intensities of the refresh frame and the plurality of sustain frames and the high level durations of the refresh frame and the plurality of sustain frames can be detected by the photo-electric probe. The product or integral of the brightness intensity of the refresh frame and the high level duration of the refresh frame is the brightness of the refresh frame. The product or integral of the signal strength of the hold frame and the high level duration of the hold frame is the brightness of the hold frame. As can be seen from fig. 4, the luminance of the refresh frame in fig. 4 is smaller than the luminance of the plurality of sustain frames.
And secondly, determining the brightness difference value between the refresh frame and the hold frame corresponding to each display brightness test value.
Illustratively, the brightness of the refresh frame is subtracted from the brightness of the hold frame to obtain a brightness difference between the refresh frame and the hold frame.
And thirdly, determining a compensation value of the holding frame corresponding to each display brightness test value according to the brightness difference value and the corresponding relation between the brightness and the duty ratio of the light-emitting duration.
In some examples, there is a linear relationship between the luminance of the hold frame and the light emission duration duty cycle, the higher the luminance of the hold frame, the larger the corresponding light emission duration duty cycle; the lower the brightness of the hold frame is, the smaller the corresponding light emitting duration duty ratio is. The corresponding relationship can be obtained by the related technical personnel through experiments. According to the brightness difference value between a certain holding frame and the refresh frame and the corresponding relation between the brightness and the light-emitting duration duty ratio, the light-emitting duration duty ratio corresponding to the brightness difference value can be determined, and the determined light-emitting duration duty ratio is determined as the compensation value of the holding frame.
Optionally, the third step may be replaced by determining a compensation value of the retention frame corresponding to each display brightness test value according to the brightness difference.
In some examples, an approximate compensation value is determined based on the luminance difference between the refresh frame and the hold frame. For example, the luminance of the refresh frame is smaller than that of the hold frame, and the luminance difference between the refresh frame and the hold frame is large. A first compensation value may be empirically determined, the duty ratio of the light-emitting duration of the sustain frame may be compensated using the first compensation value, and then the display effect of the display panel may be observed at the compensated duty ratio of the light-emitting duration. And adjusting the first compensation value according to the display effect of the display panel, and taking the first compensation value corresponding to the display panel without obvious flicker as the compensation value of the holding frame.
In step 303, a mapping relationship between the display luminance corresponding to each refresh rate test value and the duty ratio of the retention frame is generated according to the plurality of display luminance test values and the compensation value of the retention frame corresponding to each display luminance test value.
And storing the mapping relation between different display brightness and the compensation value in a controller of the display panel after the mapping relation is obtained under different refreshing frequencies.
The following explains effects of the control method using the display panel in the embodiment of the present disclosure by way of example. Fig. 5 is a schematic diagram of the luminance of the refresh frame and the luminance of the hold frame corresponding to the duty cycle of the second light-emitting duration provided by the embodiment of the present disclosure, where the diagram is obtained by compensating the duty cycle of the light-emitting duration of the hold frame in fig. 4. The brightness of the refresh frame in fig. 4 is less than the brightness of the sustain frame. In fig. 5, after the light emission duration duty ratio of the hold frame is reduced by the compensation value m, the luminance of the hold frame is reduced, so that the luminance difference between the refresh frame and the hold frame is reduced.
Fig. 6 is a block diagram of a control device 600 of a display panel according to an embodiment of the present disclosure. As shown in fig. 6, the apparatus includes: a first determination module 601, a second determination module 602, and a control module 603.
The first determining module 601 is configured to determine a first light-emitting duration duty ratio, where the first light-emitting duration duty ratio is a ratio of a light-emitting duration corresponding to a refresh frame at a first display brightness of the display panel to a frame duration. A second determining module 602, configured to determine a second light-emitting duration duty cycle of a target hold frame according to the first light-emitting duration duty cycle, a first refresh rate, and the first display brightness, where the refresh frame and the target hold frame correspond to a same frame, a difference between brightness when the refresh frame and the target hold frame emit light at the first light-emitting duration duty cycle is larger, a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is larger, the difference between the brightness difference is smaller, and a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is smaller. And a control module 603, configured to control the display panel to emit light at the target retention frame according to the second light-emitting duration duty ratio.
Optionally, the second determining module 602 is configured to determine a compensation value of the target retention frame according to the first refresh rate and the first display brightness; and compensating the first light-emitting duration duty ratio by using the compensation value of the target hold frame to obtain a second light-emitting duration duty ratio.
Optionally, the second determining module 602 is configured to determine a target mapping relationship corresponding to the display panel at the first refresh rate, where the target mapping relationship is a mapping relationship between display brightness and a compensation value; and determining a compensation value of the target keeping frame according to the first display brightness and the target mapping relation.
Optionally, the second determining module 602 is configured to use a sum of the first light-emitting duration duty cycle and the compensation value as a second light-emitting duration duty cycle of the target holding frame.
Optionally, the apparatus further comprises a mapping relation generating module 604, wherein the mapping relation generating module 604 is configured to determine a plurality of refresh rate test values of the display panel; determining a plurality of display brightness test values corresponding to each refresh rate test value and a compensation value of a retention frame corresponding to each display brightness test value; and generating a mapping relation between the display brightness corresponding to each refresh rate test value and the compensation value according to the plurality of display brightness test values and the compensation value of the retention frame corresponding to each display brightness test value.
It should be noted that: in the display panel control device 600 according to the above embodiment, only the division of the functional modules is illustrated, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the functions described above. In addition, the control device 600 of the display panel provided in the above embodiment and the control method embodiment of the display panel belong to the same concept, and specific implementation processes thereof are described in the method embodiment and are not described herein again.
Fig. 7 is a block diagram of a computer device provided in an embodiment of the present disclosure. As shown in fig. 7, the computer apparatus 700 includes: a processor 701 and a memory 702.
The processor 701 may include one or more processing cores, such as a 7-core processor, an 8-core processor, and so on. The processor 701 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 701 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 701 may be integrated with a GPU (Graphics Processing Unit) that is responsible for rendering and drawing the content that the display panel needs to display. In some embodiments, the processor 701 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
Those skilled in the art will appreciate that the configuration illustrated in FIG. 7 is not intended to be limiting of the computer device 700 and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components may be employed.
Embodiments of the present invention also provide a non-transitory computer-readable medium, where instructions in the medium, when executed by a processor of the computer device 700, enable the computer device 700 to perform the control method of the display panel provided in the embodiments of the present disclosure.
A computer program product comprising a computer program/instructions which, when executed by a processor, implement the control method of a display panel provided in embodiments of the present disclosure.
The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.
Claims (10)
1. A method of controlling a display panel, the method comprising:
determining a first light-emitting duration duty ratio, wherein the first light-emitting duration duty ratio is the ratio of the light-emitting duration corresponding to the refresh frame at the first display brightness of the display panel to the frame duration;
determining a second light-emitting duration duty ratio of a target holding frame according to the first light-emitting duration duty ratio, a first refresh rate and the first display brightness, wherein the refresh frame and the target holding frame correspond to the same frame, the greater the brightness difference between the refresh frame and the target holding frame when the refresh frame and the target holding frame emit light at the first light-emitting duration duty ratio, the greater the difference between the second light-emitting duration duty ratio and the first light-emitting duration duty ratio, the smaller the brightness difference, and the smaller the difference between the second light-emitting duration duty ratio and the first light-emitting duration duty ratio;
and controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio.
2. The method of claim 1, wherein determining a second light emission duration duty cycle of a target retention frame based on the first light emission duration, a first refresh rate, and the first display brightness comprises:
determining a compensation value of the target retention frame according to the first refresh rate and the first display brightness;
and compensating the first light-emitting duration duty ratio by using the compensation value of the target hold frame to obtain a second light-emitting duration duty ratio.
3. The method of claim 2, wherein determining the compensation value for the target retention frame based on the first refresh rate and the first display brightness comprises:
determining a corresponding target mapping relation of the display panel under the first refresh rate, wherein the target mapping relation is a mapping relation between display brightness and a compensation value;
and determining a compensation value of the target keeping frame according to the first display brightness and the target mapping relation.
4. The method according to claim 2, wherein the compensating the first light emitting duration duty cycle according to the compensation value of the target hold frame to obtain the second light emitting duration duty cycle comprises:
and taking the sum of the first light emitting time length duty ratio and the compensation value as the second light emitting time length duty ratio.
5. The method according to any one of claims 1 to 4, further comprising:
determining a plurality of refresh rate test values for the display panel;
determining a plurality of display brightness test values corresponding to each refresh rate test value and a compensation value of a retention frame corresponding to each display brightness test value;
and generating a mapping relation between the display brightness corresponding to each refresh rate test value and the compensation value according to the plurality of display brightness test values and the compensation value of the retention frame corresponding to each display brightness test value.
6. A control apparatus of a display panel, characterized in that the apparatus comprises:
the first determining module is used for determining a first luminous duration duty ratio, wherein the first luminous duration duty ratio is the ratio of the luminous duration corresponding to the refresh frame at the first display brightness of the display panel to the frame duration;
a second determining module, configured to determine a second light-emitting duration duty cycle of a target hold frame according to the first light-emitting duration duty cycle, a first refresh rate, and the first display brightness, where the refresh frame and the target hold frame correspond to a same frame, and a difference between brightness when the refresh frame and the target hold frame emit light at the first light-emitting duration duty cycle is larger, a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is larger, the difference between the brightness difference is smaller, and a difference between the second light-emitting duration duty cycle and the first light-emitting duration duty cycle is smaller;
and the control module is used for controlling the display panel to emit light at the target holding frame according to the second light-emitting duration duty ratio.
7. The apparatus according to claim 6, wherein the second determining module is configured to determine the compensation value of the target retention frame according to the first refresh rate and the first display brightness; and compensating the first light-emitting duration duty ratio by using the compensation value of the target hold frame to obtain a second light-emitting duration duty ratio.
8. A computer device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of any one of claims 1 to 5.
9. A computer-readable medium, wherein instructions in the computer-readable medium, when executed by a processor of a computer device, enable the computer device to perform the method of any of claims 1 to 5.
10. A computer program product comprising computer programs/instructions, characterized in that the computer programs/instructions, when executed by a processor, implement the method of any of claims 1 to 5.
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