CN114495791A - Display control method and device of display panel and display device - Google Patents
Display control method and device of display panel and display device Download PDFInfo
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- CN114495791A CN114495791A CN202210090364.8A CN202210090364A CN114495791A CN 114495791 A CN114495791 A CN 114495791A CN 202210090364 A CN202210090364 A CN 202210090364A CN 114495791 A CN114495791 A CN 114495791A
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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
- G09G3/2003—Display of colours
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
Abstract
The invention relates to a display control method, a display control device and a display device of a display panel. According to the invention, the transitional display picture is inserted when the refresh rate of the display picture is switched, so that the problems of brightness difference and flicker caused when the refresh rate of the display picture is switched can be solved, and the display effect and the use comfort of a user are improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display control method and device for a display panel, and a display device.
Background
The display frequency conversion technique is a display technique that selects a suitable refresh rate according to display contents, and the refresh frequency of the display device is generally fixed at a certain frequency during operation, for example, the most common refresh frequency is 60 hertz (Hz). However, in some special display screens, the display device is required to display with a higher or lower refresh frequency, for example, a high refresh frequency operation in a game or video mode improves the screen experience, and a low refresh rate operation in a static screen or text application mode reduces power consumption. At present, the market terminal mostly adopts Variable Refresh Rate (VRR), and by synchronizing the Refresh frequency of the compatible display device and the frame Rate of the display card, the problems of pause, splash screen or tearing during the playing of the game and the playing of the video can be reduced or eliminated to the maximum extent, and the problems of pause, splash screen or tearing during the playing of the game and the playing of the video can be reduced or eliminated to the maximum extent.
However, in a display device using a variable refresh rate, the switching of the refresh frequency causes a change in gray-scale luminance, resulting in a flicker phenomenon on the screen. Because the charging time is the same for each frame of the high refresh frequency and the low refresh frequency, and the blank time (blank time) between two frames, i.e. the interval time between two adjacent frames, is not the same. Fig. 1 is a schematic diagram of frame durations of different refresh rates in the conventional variable refresh rate technology, and as shown in fig. 1, an interval time between adjacent scan signals of each stage of scan lines (G1-Gn) is a frame time, and a blank time Tb1 at a low refresh frequency (60Hz) is greater than a blank time Tb2 at a high refresh frequency (120Hz), so that the corresponding frame duration at the low refresh frequency is longer, which results in a longer leakage time of thin film transistors in a panel, and finally, the overall brightness of the panel is reduced, and there is a brightness difference. Therefore, the technology of dynamically monitoring real-time frequency conversion according to the display image has the problems of brightness difference and flicker during the switching of different frequencies, and influences the user experience.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
In view of the above technical problems, the present application provides a display control method and device for a display panel, and a display device, which can improve the problems of brightness difference and flicker caused when the refresh rate of a display screen is switched, and improve the display effect and the use comfort of a user.
In order to solve the above technical problem, the present application provides a display control method of a display panel, the method including:
acquiring gray scales and refresh rates of a current frame display picture and a next frame display picture to be displayed;
obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed;
when the brightness difference value is larger than a first preset value and the gray scales of the current frame display picture and the next frame display picture to be displayed are the same, adding at least one frame transition display picture for displaying before controlling the display panel to display the next frame display picture to be displayed;
the difference value between the gray scale of the at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is smaller than a second preset value, and the brightness value corresponding to the at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
Optionally, the obtaining the brightness difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rates of the current frame display picture and the next frame display picture to be displayed includes:
acquiring an absolute value of a difference value between the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the absolute value as the brightness difference value; or the like, or a combination thereof,
and respectively obtaining corresponding brightness values according to the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the difference value of the corresponding brightness values as the brightness difference value.
Optionally, the method further comprises:
and establishing and storing a brightness value LUT table of brightness values corresponding to different refresh rates of each gray scale, wherein the brightness value LUT table is used for acquiring the brightness values of the display pictures.
Optionally, when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially increased;
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially reduced;
the multi-frame transition display picture is obtained according to a brightness value LUT table, and the brightness value LUT table comprises brightness values corresponding to different refresh rates of each gray scale.
Optionally, when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than the refresh rate of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
Optionally, the sequentially increasing is sequentially increasing by equal difference; and/or the sequential reduction is sequential arithmetic reduction.
In order to achieve the above object, the present application further provides a display control device of a display panel, the device includes a temporary storage processing module and a timing control module; wherein the content of the first and second substances,
the temporary storage processing module is used for acquiring the gray scale and the refresh rate of a current frame display picture and a next frame display picture to be displayed, obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed, and sending a correction control signal to the time sequence control module when the brightness difference value is greater than a first preset value and the gray scale of the current frame display picture and the gray scale of the next frame display picture to be displayed are the same;
the time sequence control module is used for adding at least one frame of transition display picture for display before controlling the display panel to display the next frame of display picture to be displayed after receiving the correction control signal;
the difference value between the gray scale of the at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is smaller than a preset value, and the brightness value corresponding to the at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
Optionally, the temporary storage processing module is configured to obtain an absolute value of a difference between a refresh rate of the next frame of display image to be displayed and a refresh rate of the current frame of display image, and use the absolute value as the brightness difference; or the like, or, alternatively,
and respectively obtaining corresponding brightness values according to the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the difference value of the corresponding brightness values as the brightness difference value.
Optionally, when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same, and the gray levels are sequentially reduced.
Optionally, when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than the refresh rate of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
Optionally, the sequentially increasing is sequentially increasing by equal difference; and/or the sequential reduction is sequential arithmetic reduction.
Optionally, the apparatus further includes a storage module, where the storage module stores a brightness value LUT table of brightness values corresponding to different refresh rates for each gray scale, and the brightness value LUT table is used to obtain a brightness value of a display image.
To achieve the above object, the present application also provides a display device including any one of the above display control devices.
According to the display control method, the display control device and the display device of the display panel, the gray scales and the refresh rates of the current frame display picture and the next frame display picture to be displayed are obtained, the brightness difference value between the current frame display picture and the next frame display picture to be displayed is obtained according to the refresh rates of the current frame display picture and the next frame display picture to be displayed, at least one frame of transition display picture is added for displaying before the display panel is controlled to display the next frame display picture to be displayed when the brightness difference value is larger than a first preset value and the gray scales of the current frame display picture and the next frame display picture to be displayed are the same, the problems of brightness difference and flicker caused when the refresh rate of the display picture is switched can be solved, and the display effect and the use comfort level of a user are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of frame durations at different refresh rates for a prior art variable refresh rate technique;
fig. 2 is a flowchart of a display control method of a display panel according to an embodiment of the present disclosure;
FIG. 3 is a diagram illustrating adding a transitional display in a specific situation according to an embodiment of the present application;
FIG. 4 is a diagram illustrating adding a transitional display in a specific situation according to another embodiment of the present application;
fig. 5 is a schematic structural and connection diagram of a display control device according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings. With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting.
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 scope of the present invention.
It is to be noted that unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The description herein of "first," "second," and the like, does not denote any order, quantity, or importance, but rather the description is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
To ensure the following description of the embodiments of the present disclosure is clear and concise, a detailed description of known functions and known components may be omitted from the present disclosure, and the description will focus on the inventive points of the present disclosure.
When the display panel processes the display frame, the variable refresh rate technology is often used to process different display frames, and the current frame display frame and the next frame display frame may be at the same gray level value but at different refresh rate values. If the brightness difference between two different frames is too large, the display image is easy to flicker obviously, and the display effect of the panel is affected. In order to solve the problems of brightness difference, flicker, and the like when the refresh rate is switched between different frames of display pictures, embodiments of the present application provide a display control method for a display panel to improve the above problems.
Fig. 2 is a flowchart of a display control method of a display panel according to an embodiment of the present application. As shown in fig. 2, the display control method includes the steps of:
s10, obtaining the gray scale and refresh rate of the current frame display picture and the next frame display picture to be displayed.
Specifically, the gray levels of the display frame refer to the gray levels of all the pixel units, and when the display frame is a gray-level frame, the gray levels of all the pixel units are the same, for example, all the gray levels are L255 gray levels, and when the display frame is a normal image display frame, the gray levels of all the pixel units are different, and each sub-pixel, for example, R, G, B sub-pixel, in each pixel unit may have different gray levels. The refresh rate of the display frame may be 30Hz, 40Hz, 60Hz, 80Hz, 100Hz, etc., and the higher the refresh rate is, the higher the display brightness corresponding to the same gray scale is. When the display panel displays a frame, the refresh rate of the display frame can be determined by a control signal of the display refresh rate at the frame signal input terminal, and the control signal of the frame refresh rate can be a vertical synchronization signal, such as a VSYNC control signal, or an STV signal. When the display panel displays the image, the refresh rates of the two frames of images switched are not always the same, so that the next frame of image and the current frame of display image to be displayed need to be acquired, and the corresponding gray scales and refresh rates thereof need to be detected.
It should be noted that obtaining the gray scale of the display frame is a sense when performing frame display, but this embodiment obtains the gray scale of the display frame and also determines whether the gray scales of the next frame of frame to be displayed and the current frame of frame are the same or similar for gray scale comparison, so as to ensure that the problems of brightness difference, flicker, and the like caused by switching the refresh rate are improved under the condition of the same gray scale or similar gray scales.
And S20, obtaining the brightness difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed.
Specifically, if the brightness difference between the current frame display picture and the next frame display picture to be displayed is not large and is not in the perception range of human eyes, the next frame display picture to be displayed can be directly displayed at the corresponding refresh rate without controlling and adjusting the display. However, if the difference between the brightness of the current frame display picture and the brightness of the next frame display picture to be displayed is large and is within the perception range of human eyes, i.e., human eyes can perceive the obvious flicker and the obvious brightness difference, the subsequent step of inserting the transition display picture is required. And the specific brightness difference values of different pictures can be calculated according to the refresh rate.
In one embodiment, the step S20 of obtaining the luminance difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed includes:
and acquiring the absolute value of the difference value between the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the absolute value as the brightness difference value.
Specifically, the brightness difference values of different display frames can be directly judged according to the difference value of the refresh rate. For example, when the current frame display picture and the next frame display picture to be displayed are the same or similar gray scales, the larger the difference of the refresh rate is, the larger the difference of the brightness values of the different display pictures is. Of course, in the present embodiment, the brightness difference determination is performed according to the refresh rate, and only the brightness difference is roughly determined, because the brightness difference is only a precondition for performing subsequent insertion into the transitional display picture, and it is not necessarily required to obtain an accurate brightness difference.
In one embodiment, the step 20 of obtaining the luminance difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed includes:
and respectively obtaining corresponding brightness values according to the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the difference value of the corresponding brightness values as a brightness difference value.
Specifically, in the present embodiment, the luminance difference is accurately calculated by calculating the luminance value of each pixel unit in the display frame at different refresh rates, for example, according to the formula: and calculating a brightness value of each pixel unit in the display picture by 0.6 × R +0.3 × G +0.1 × B, wherein L is the brightness value of the pixel unit, and R, G, B is the brightness values of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the pixel unit respectively. Then, a luminance value corresponding to the display image is obtained according to the luminance value of each pixel unit, for example, an average luminance is calculated according to the luminance value of each pixel unit to be used as the luminance value corresponding to the display image, and then a luminance difference value between the display image of the next frame to be displayed and the display image of the current frame is further obtained.
S30, when the brightness difference is larger than the first preset value and the gray scale of the current frame display picture is the same as that of the next frame display picture to be displayed, adding at least one frame transition display picture for display before controlling the display panel to display the next frame display picture to be displayed;
the difference value between the gray scale of at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is smaller than a second preset value, and the brightness value corresponding to at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
Specifically, the first preset value may be configured according to a difference in perception of brightness by different users, for example, by obtaining user information, the different first preset values may be configured according to information that may represent a biological characteristic of the user in the user information. In order to solve the brightness difference when the display frames with different refresh rates are switched, the frame content of the transitional display frame is necessarily required to be the same as or similar to the current frame display frame and the next frame display frame to be displayed, that is, the difference value between the gray scale of at least one frame of transitional display frame and the gray scale of the next frame display frame to be displayed is smaller than a second preset value, wherein the second preset value is to ensure that the frame content of the transitional display frame is the same as or similar to the current frame display frame and the next frame display frame to be displayed, for example, within 3 gray scales, human eyes cannot perceive the change of the display content, and at this time, the second preset value is 3. The brightness value corresponding to the transition display picture is between the brightness value corresponding to the current frame display picture and the brightness value corresponding to the next frame display picture to be displayed, so that the brightness gradient of the pictures is changed in the picture switching process, and the overlarge brightness change is avoided when the display pictures with different refresh rates are switched.
In one implementation, when at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially increased;
and when at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
Specifically, fig. 3 is a schematic diagram of adding a transition display frame in a specific situation according to an embodiment of the present application. As shown in fig. 3, the refresh rate of the current frame display image is 120Hz, the refresh rate of the next frame display image to be displayed is 40Hz, when the current frame display image is switched to the next frame display image to be displayed, three transitional display images of 100Hz, 80Hz, and 60Hz may be added by correction, and the actual display is 120Hz, 100Hz, 80Hz, 60Hz, and 40Hz in sequence. The blank time (Tb120, Tb100, Tb80, Tb60 and Tb40) in each frame display screen is increased in sequence, namely, the brightness is gradually reduced, thereby improving the brightness difference and the flicker problem when the display screen is switched from 120Hz to 40 Hz. Of course, when switching from 40Hz to 120Hz, the refresh rates of the transitional pictures that are increased by correction are 40Hz, 60Hz, 80Hz, 100Hz, and 120Hz in this order.
In one embodiment, when at least one frame of transition display frame is a multi-frame transition display frame, and the refresh rate of the next frame of display frame to be displayed is greater than that of the current frame of display frame, the refresh rates of the multi-frame transition display frames are the same, and the gray levels are sequentially increased;
when at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray scales are reduced in sequence;
the multi-frame transition display picture is obtained according to a brightness value LUT table, wherein the brightness value LUT table comprises brightness values corresponding to different refresh rates of each gray scale.
Specifically, for clarity, fig. 4 is a schematic diagram of adding a transition display frame in a specific situation provided by another embodiment of the present application. As shown in fig. 4, when switching from (30Hz) L255 to (140Hz) L255, before correction, that is, when the transitional display screen is not added, switching is directly from (30Hz) L255 to (140Hz) L255. After the transition display screen is added, the display screens are sequentially displayed from (30Hz) L255, (140Hz) L251, (140Hz) L253 and (140Hz) L255. The increased multi-frame transition display frames ((140Hz) L251, (140Hz) L253) are obtained according to a brightness value LUT table, wherein the brightness value LUT table comprises brightness values corresponding to different refresh rates for each gray scale.
For the brightness value LUT table, since the same gamma curve is used by the display panel at different refresh frequencies, the target brightness values corresponding to the same gamma curve for the same gray scales at different refresh rates are the same, that is, the same parameters, that is, the same driving voltages are used to drive the same gray scale pictures at different refresh rates, and the actual brightness of the display picture corresponding to the display picture with the high 6 refresh rate is higher than the actual brightness of the display picture with the low 6 refresh rate, the brightness value LUT table is obtained by measuring the actual brightness of each gray scale at different refresh rates in advance. When the transitional display picture is determined, the transitional display picture can be obtained according to the brightness value LUT table. For example, if the table look-up indicates that (140Hz) L254 ≈ (120Hz) L255, (140Hz) L253 ≈ (100Hz) L255, (140Hz) L252 ≈ (75Hz) L255, (140Hz) L251 ≈ (50Hz) L255, and (140Hz) L250 ≈ 30Hz) L255, the actual luminance of (30Hz) L255 is approximately equal to the actual luminance of (140Hz) L250 when switching from (30Hz) L255 to (140Hz) L255, and then (140Hz) L251 and (140Hz) L253 can be sequentially increased as the transition display screen. Of course, the reverse switching is performed in the order of (140Hz) L255, (140Hz) L253, (140Hz) L251, and (30Hz) L255.
Fig. 3 and 4 are only exemplary illustrations of the specific screen switching according to the respective embodiments.
In one embodiment, the sequential increase is a sequential arithmetic increase; and/or sequentially reduced to sequentially equal difference reduced.
Specifically, for example, in fig. 3, the added transition display frames are corresponding display frames of 100Hz, 80Hz, and 60Hz, and in this case, the arithmetic difference is sequentially reduced, but may be 100Hz, 90Hz, and 60 Hz.
In one embodiment, the display control method further includes: and establishing and storing a brightness value LUT table of brightness values corresponding to different refresh rates for each gray scale.
In summary, the display control method of the display panel according to the embodiment of the present invention obtains the gray scale and the refresh rate of the current frame display frame and the next frame display frame to be displayed, then obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed, when the brightness difference is larger than the first preset value and the gray scale of the current frame display picture is the same as that of the next frame display picture to be displayed, adding at least one frame of transition display picture for display before controlling the display panel to display the next frame of display picture to be displayed, the transition display frame can be inserted when the refresh rate of the display frame is switched, so that the problems of brightness difference and flicker caused when the refresh rate of the display frame is switched can be solved, and the display effect and the use comfort of a user are improved.
To achieve the above object, the present application further provides a display control device of a display panel, and fig. 5 is a schematic structural and connection diagram of the display control device according to an embodiment of the present application. As shown in fig. 5, the display control apparatus includes a temporary storage processing module and a timing control module; wherein the content of the first and second substances,
the temporary storage processing module 10 is configured to obtain gray scales and refresh rates of a current frame display picture and a next frame display picture to be displayed, obtain a luminance difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rates of the current frame display picture and the next frame display picture to be displayed, and send a correction control signal to the timing control module when the luminance difference is greater than a first preset value and the gray scales of the current frame display picture and the next frame display picture to be displayed are the same;
the timing control module 20 is configured to, after receiving the correction control signal, add at least one frame of transition display image for display before controlling the display panel to display a next frame of display image to be displayed;
the difference value between the gray scale of at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is less than a preset value, and the brightness value corresponding to at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
Specifically, the Timing control module 20 may be a Timing Controller (TCON) that can fix a Frequency of a Pixel Clock signal (Pixel Clock Frequency) and support a varying Frame Rate (Frame Rate) by adjusting a Blank Time (Blank Time). The temporary storage processing module 10 may be integrated into the timing controller.
In one embodiment, the temporary storage processing module 10 is configured to obtain an absolute value of a difference between a refresh rate of a next frame of display image to be displayed and a refresh rate of a current frame of display image, and use the absolute value as a brightness difference; or the like, or, alternatively,
and respectively obtaining corresponding brightness values according to the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the difference value of the corresponding brightness values as a brightness difference value.
In one embodiment, when at least one frame of transition display frame is a multi-frame transition display frame, and the refresh rate of the next frame of display frame to be displayed is greater than that of the current frame of display frame, the refresh rates of the multi-frame transition display frames are the same, and the gray levels are sequentially increased;
when at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same, and the gray scales are reduced in sequence.
In one embodiment, when at least one frame of transition display frame is a multi-frame transition display frame, and the refresh rate of the next frame of display frame to be displayed is greater than that of the current frame of display frame, the refresh rates of the multi-frame transition display frames are sequentially increased;
and when at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
In an embodiment, the display control apparatus further includes a storage module, and the storage module stores a luminance value LUT table of luminance values corresponding to different refresh rates for each gray scale.
In order to achieve the above object, an embodiment of the present application further provides a display control apparatus for a display panel, where the display control apparatus for a display panel includes a memory and a processor, the memory stores at least one program instruction, and the processor loads and executes the at least one program instruction to implement the display control method for a display panel according to any one of the above embodiments.
It should be noted that, the principle and the working process of the display control apparatus of the display panel provided in this embodiment may refer to the driving method of the display panel, and are not described herein again.
To achieve the above object, the present application further provides a display device including any one of the above display control devices.
Specifically, in the display device, the display control device drives the display panel to display a corresponding display picture by controlling the scan driving circuit and the data driving circuit, and the display device may be any electronic product or component with a display function, such as a smart phone, a tablet computer, a smart television, a notebook computer, and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
In summary, the display control device and the display device of the display panel according to the embodiments of the present invention can obtain the gray scale and the refresh rate of the current frame display frame and the next frame display frame to be displayed, then obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed, when the brightness difference is larger than the first preset value and the gray scale of the current frame display picture is the same as that of the next frame display picture to be displayed, adding at least one frame of transition display picture for display before controlling the display panel to display the next frame of display picture to be displayed, the transition display frame can be inserted when the refresh rate of the display frame is switched, so that the problems of brightness difference and flicker caused when the refresh rate of the display frame is switched can be solved, and the display effect and the use comfort of a user are improved.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A display control method of a display panel, comprising:
acquiring gray scales and refresh rates of a current frame display picture and a next frame display picture to be displayed;
obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed;
when the brightness difference value is larger than a first preset value and the gray scales of the current frame display picture and the next frame display picture to be displayed are the same, adding at least one frame transition display picture for displaying before controlling the display panel to display the next frame display picture to be displayed;
the difference value between the gray scale of the at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is smaller than a second preset value, and the brightness value corresponding to the at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
2. The method according to claim 1, wherein obtaining the luminance difference between the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed comprises:
acquiring an absolute value of a difference value between the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the absolute value as the brightness difference value; or the like, or, alternatively,
and respectively obtaining corresponding brightness values according to the refresh rate of the next frame of display picture to be displayed and the refresh rate of the current frame of display picture, and taking the difference value of the corresponding brightness values as the brightness difference value.
3. The display control method according to claim 1, further comprising:
and establishing and storing a brightness value LUT table of brightness values corresponding to different refresh rates of each gray scale, wherein the brightness value LUT table is used for acquiring the brightness values of the display pictures.
4. The display control method according to claim 1 or 3,
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially increased;
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially reduced;
the multi-frame transition display picture is obtained according to a brightness value LUT table, and the brightness value LUT table comprises brightness values corresponding to different refresh rates of each gray scale.
5. The display control method according to claim 1,
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
6. The display control method according to claim 4 or 5, wherein the sequential increase is a sequential arithmetic increase; and/or the sequential reduction is sequential arithmetic reduction.
7. The display control device of the display panel is characterized by comprising a temporary storage processing module and a time sequence control module; wherein the content of the first and second substances,
the temporary storage processing module is used for acquiring the gray scale and the refresh rate of a current frame display picture and a next frame display picture to be displayed, obtaining the brightness difference value of the current frame display picture and the next frame display picture to be displayed according to the refresh rate of the current frame display picture and the next frame display picture to be displayed, and sending a correction control signal to the time schedule controller when the brightness difference value is greater than a first preset value and the gray scale of the current frame display picture and the gray scale of the next frame display picture to be displayed are the same;
the time sequence control module is used for adding at least one frame of transition display picture for display before controlling the display panel to display the next frame of display picture to be displayed after receiving the correction control signal;
the difference value between the gray scale of the at least one frame of transition display picture and the gray scale of the next frame of display picture to be displayed is smaller than a preset value, and the brightness value corresponding to the at least one frame of transition display picture is between the brightness value corresponding to the current frame of display picture and the brightness value corresponding to the next frame of display picture to be displayed.
8. The display control apparatus according to claim 7,
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same and the gray levels are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are the same, and the gray levels are sequentially reduced.
9. The display control apparatus according to claim 7,
when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is greater than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially increased;
and when the at least one frame of transition display picture is a multi-frame transition display picture and the refresh rate of the next frame of display picture to be displayed is less than that of the current frame of display picture, the refresh rates of the multi-frame transition display pictures are sequentially reduced.
10. A display device characterized by comprising the display control device according to any one of claims 7 to 9.
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