CN112927658A - Driving method and driving device of display panel and display device - Google Patents
Driving method and driving device of display panel and display device Download PDFInfo
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- CN112927658A CN112927658A CN202110114942.2A CN202110114942A CN112927658A CN 112927658 A CN112927658 A CN 112927658A CN 202110114942 A CN202110114942 A CN 202110114942A CN 112927658 A CN112927658 A CN 112927658A
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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 discloses a driving method, a driving device and a display device of a display panel, which are characterized in that the refreshing rate of a frame picture to be displayed is obtained, when the refreshing rate of the frame picture to be displayed is not the highest refreshing rate, a pre-stored corresponding RGB brightness correction table is called according to the refreshing rate of the frame picture to be displayed, the gray scale of the frame picture to be displayed is adjusted, and then the frame picture to be displayed after the gray scale is adjusted is output, wherein when the refreshing rate is not the highest refreshing rate, different refreshing rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of RGB sub-pixels when the refreshing rate in the same gray scale is switched, so that the display brightness balance is kept. Different RGB brightness correction tables are called when the refresh rate in the same gray scale is switched, the output gray scale of RGB sub-pixels in a frame to be displayed is adjusted, the display brightness balance under different refresh rates is kept, the picture flicker phenomenon when the refresh rate in the same gray scale is switched is eliminated, and the product quality and the user experience are improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method and a driving apparatus for a display panel, and a display apparatus.
Background
A Liquid Crystal Display (LCD) has the advantages of low radiation, small size, low energy consumption, and the like, and is widely used in electronic products such as notebook computers, smart flat televisions, smart phones, and the like.
With the development of display technology, existing liquid crystal displays support a variety of refresh rates, which refers to the number of times a display screen is refreshed per second. Nowadays, due to the continuous development of the field of electric competitions, the requirements of more and more game players on the display are higher and higher. Therefore, the conventional liquid crystal display generally supports a power saving mode with a refresh rate of 48Hz, a daily use mode with a refresh rate of 60Hz, and a game mode with a refresh rate of 144 Hz. However, with the switching of the refresh rate, the brightness of the display screen also changes, so that a flicker phenomenon occurs, that is, the display brightness of the same gray-scale screen is different at different refresh rates.
Moreover, although the brightness of the same gray-scale picture is different under different refresh rates, the brightness difference is generally small, for example, the difference between 48Hz and 60Hz is only 1-2nit, and even between 48Hz and 144Hz is only 10nit, so that the brightness cannot be accurately adjusted to be consistent by a common power supply adjusting method.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a driving method, a driving device and a display device for a display panel, which can solve the problem of image flicker caused by inconsistent display brightness when the display device switches the refresh rates in the same gray-scale image, ensure the brightness balance at each refresh rate, and improve the product quality.
In order to achieve the above object, a first aspect of embodiments of the present invention provides a driving method of a display panel, which includes as one implementation:
obtaining the refresh rate of a frame to be displayed;
when the refresh rate of the frame picture to be displayed is not the highest refresh rate, calling a corresponding pre-stored RGB brightness correction table according to the refresh rate of the frame picture to be displayed so as to adjust the gray scale of the frame picture to be displayed;
outputting the frame picture to be displayed after the gray scale is adjusted;
when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of the RGB sub-pixels when the refresh rate in the same gray scale is switched so as to keep the display brightness balance.
In one embodiment, the refresh rate of the frame to be displayed includes at least two refresh rates.
As one embodiment, the step of calling the pre-stored corresponding RGB brightness correction table according to the refresh rate of the frame picture to be displayed further includes:
acquiring brightness values of all gray scales of a first gray scale format under different refresh rates, wherein the first gray scale format is a gray scale format corresponding to an original gray scale of the frame picture to be displayed;
expanding the first gray scale format into a second gray scale format according to an ACC algorithm, wherein the gray scale level of the second gray scale format is greater than that of the first gray scale format;
acquiring the brightness value of each gray scale in the second gray scale format through interpolation calculation;
calculating gray scale values to be compensated of each gray scale RGB in the second gray scale format under other refresh rates by taking the brightness value of each gray scale in the second gray scale format under the highest refresh rate as a reference brightness value;
and adjusting the same gray scale quantity for each gray scale RGB according to the gray scale value which needs to be compensated for each gray scale RGB in the second gray scale format under other refresh rates so as to generate the RGB brightness correction table corresponding to other refresh rates.
As an embodiment, the step of adjusting the same number of gray scales for each gray scale RGB sub-pixel according to the gray scale value to be compensated of each gray scale RGB sub-pixel in the second gray scale format at the other refresh rate to generate the RGB brightness correction table corresponding to the other refresh rate further includes:
and respectively adjusting the gray-scale values of the RGB sub-pixels in the RGB brightness correction table according to the color temperature and the chromaticity requirement.
In one embodiment, the gray scale level of the first gray scale format is 256 gray scales, and the gray scale level of the second gray scale format is 4096 gray scales.
As one embodiment, the step of obtaining the refresh rate of the frame to be displayed includes:
acquiring a data signal of the frame picture to be displayed;
and determining the refresh rate of the frame picture to be displayed according to the frame starting signal in the data signal.
As one embodiment, the step of calling the pre-stored corresponding RGB brightness correction table according to the refresh rate of the frame picture to be displayed includes:
comparing the refresh rate of the frame picture to be displayed with the refresh rate of the current display frame picture;
when the refresh rate of the frame picture to be displayed is different from the refresh rate of the current display frame picture, judging whether the refresh rate of the frame picture to be displayed is the highest refresh rate;
and calling a pre-stored RGB brightness correction table corresponding to the refresh rate of the frame picture to be displayed when the refresh rate of the frame picture to be displayed is not the highest refresh rate.
As one embodiment, the method for driving a display panel further includes:
and when the refresh rate of the frame picture to be displayed is the highest refresh rate, maintaining the original gray scale of the frame picture to be displayed for outputting.
In order to achieve the above object, a second aspect of the embodiments of the present invention provides a driving apparatus for a display panel, as an implementation manner, the driving apparatus for a display panel includes a memory and a processor, the memory stores at least one program instruction, and the processor implements the driving method for a display panel according to any one of the above implementation manners by loading and executing the at least one program instruction.
In order to achieve the above object, a third aspect of embodiments of the present invention provides a display device including the driving device of the display panel described in the above embodiments.
The embodiment of the invention has the following beneficial effects:
according to the driving method, the driving device and the display device of the display panel provided by the embodiment of the invention, by acquiring the refresh rate of the frame picture to be displayed, when the refresh rate of the frame picture to be displayed is not the highest refresh rate, the corresponding pre-stored RGB brightness correction table is called according to the refresh rate of the frame picture to be displayed, the gray scale of the frame picture to be displayed is adjusted, and then the frame picture to be displayed after the gray scale is adjusted is output, wherein when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of RGB sub-pixels when the refresh rate in the same gray scale is switched, so that the display brightness balance is kept. According to the invention, different RGB brightness correction tables are called when the refresh rate in the same gray scale is switched, the output gray scale of RGB sub-pixels in the frame to be displayed is adjusted, the display brightness balance under different refresh rates is kept, the image flicker phenomenon during the refresh rate switching in the same gray scale is further eliminated, and the product quality and the user experience are improved.
Drawings
Fig. 1 is a flowchart of a driving method of a display panel according to an embodiment of the invention.
FIG. 2 is an RGB gray scale table after gray scale expansion according to an embodiment of the present invention.
FIG. 3 is a RGB brightness correction table obtained after gray scale adjustment according to an embodiment of the present invention.
FIG. 4 is a table showing luminance references of partial gray levels in the first gray level format at refresh rates of 48Hz and 60Hz according to an embodiment of the present invention.
FIG. 5 is a luminance reference table of partial gray scales after the first gray scale format is expanded to the second gray scale format at 48Hz according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a driving device of a display panel according to an embodiment of the present invention.
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.
First, for a better understanding of the invention, before proceeding to the description of the specific embodiments, the present document reconstructs the derivation of the technical solution of the invention from the point of view of the inventive concept, so as to distinguish the prior art accurately, highlighting the essential features and the remarkable progress of the invention.
The technical problem of the present invention is solved because the conventional lcd supports a plurality of refresh rates, such as 48Hz power saving mode, 60Hz for daily use, and 144Hz in game mode, but the luminance of the lcd changes with the change of the refresh rate, and the main reason for the luminance difference is that the charging time of the Thin Film Transistor (TFT) of the lcd varies under the condition of different refresh rates, thereby causing the difference of the display luminance, and the gray-scale luminance of the same gray scale at high refresh rate is less than the gray-scale luminance at low refresh rate. However, the brightness difference in this case is generally small, and the brightness uniformity cannot be accurately adjusted by a general power supply adjustment method.
In order to solve the above technical problem, a Color correction technique ACC (accurate Color capture) that can change the gray scale value of R, G, B primary colors (also known as RGB sub-pixels) is an algorithm for adjusting colors precisely, and the data of 256 gray scale levels with 8 bits is expanded to 10 or 12 bits of data by an ACC logic circuit, and then displayed in 256 gray scale levels with 8 bits by frame frequency control, so that the deviation of Color coordinates and Color temperature is reduced by using the change of gray scale levels to realize precise chromaticity and Color temperature representation. Just because the color adjustment method by the ACC algorithm adjusts the gray scale brightness (i.e., the gray scale brightness adjustment corresponding to the precise original gray scale is realized after the original gray scale format is expanded into a gray scale format with more orders, which will be described in detail later), the brightness at different refresh rates can be precisely equalized by the ACC algorithm. That is, the luminance of the gray scale at the low refresh rate (e.g., 48Hz and 60Hz) is reduced by the ACC according to the same gray scale (i.e., the gray scale in the original gray scale format of the frame to be displayed, i.e., the gray scale data that is not adjusted by the ACC correction), so that the luminance of the gray scale is consistent with the luminance at the highest refresh rate (e.g., 144 Hz). Of course, the gray scale brightness consistency at the low refresh rate (between 48Hz and 60Hz) which is commonly used can also be realized by the method.
Based on the above description of the inventive concept, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings. Referring to fig. 1, fig. 1 is a flowchart illustrating a driving method of a display panel according to an embodiment of the invention. As shown in fig. 1, the driving method of the display panel provided by this embodiment includes:
step S1: and acquiring the refresh rate of the frame picture to be displayed.
In particular, to reduce power consumption of the display panel and improve the use experience in game situations, various refresh rates, such as 48Hz, 60Hz, and 144Hz, are common in current display panels. The embodiment of the present invention is described by taking three refresh rates of a frame to be displayed, including 48Hz (power saving mode), 60Hz (normal use mode), and 144Hz (game mode), as an example, but other refresh rates may be combined. Since the larger the refresh rate is, the smaller the charging time is, the smaller the electric field sensed by the liquid crystal is, and the smaller the light transmittance is, the smaller the actual display luminance is, the display luminance at the 48Hz refresh rate is larger than the display luminance at the 60Hz refresh rate, and the display luminance at the 60Hz refresh rate is larger than the display luminance at the 144Hz refresh rate.
In one embodiment, the step S1, the obtaining the refresh rate of the frame picture to be displayed includes:
acquiring a data signal of a frame picture to be displayed;
and determining the refresh rate of the frame picture to be displayed according to the frame starting signal in the data signal of the frame picture to be displayed.
Specifically, the refresh rate of the frame picture to be displayed is determined according to the received data signal of the frame picture to be displayed, which may be determining the refresh rate of the frame picture to be displayed according to the start frame square wave signal of the data signal of the frame picture to be displayed by acquiring the data signal of the frame picture to be displayed.
Step S2: and when the refresh rate of the frame picture to be displayed is not the highest refresh rate, calling a corresponding pre-stored RGB brightness correction table according to the refresh rate of the frame picture to be displayed so as to adjust the gray scale of the frame picture to be displayed.
Specifically, when the refresh rate of the frame to be displayed includes three types, i.e., 48Hz (power saving mode), 60Hz (normal use mode), and 144Hz (game mode), according to the overall description of the aforementioned inventive concepts, it can be known that the brightness at a high refresh rate is the darkest, and the lower the refresh rate is, the higher the display brightness of the same frame to be displayed is. Therefore, in order to ensure that the frames to be displayed corresponding to different refresh frequencies have the same actual light emission brightness when the same target gray scale (i.e., the same frame to be displayed) is achieved, in the present embodiment, the gray scale brightness at the highest refresh rate (144Hz) is used as a reference, and gray scale compensation values (the same compensation value is adjusted by three colors of RGB, and the display brightness of the same target gray scale is changed under the condition that the color is not changed) at other refresh rates are calculated, that is, the actual light emission brightness of the frames to be displayed (i.e., the same target gray scale) at 48Hz and 60Hz refresh rates is made to be consistent with the actual light emission brightness of the frames to be displayed at 144. Therefore, when the refresh rate of the frame picture to be displayed is not the highest refresh rate, the corresponding pre-stored RGB brightness correction table is called according to the refresh rate of the frame picture to be displayed so as to adjust the gray scale of the frame picture to be displayed. Wherein the RGB luminance correction table is substantially ACC code obtained by ACC color correction techniques, and is used herein to adjust luminance uniformity at different refresh rates, as described in detail below.
In an embodiment, the step of calling the pre-stored corresponding RGB brightness correction table according to the refresh rate of the frame to be displayed further includes:
acquiring brightness values of all gray scales of a first gray scale format under different refresh rates, wherein the first gray scale format is a gray scale format corresponding to an original gray scale of a frame to be displayed;
expanding the first gray scale format into a second gray scale format according to an ACC algorithm, wherein the gray scale level of the second gray scale format is greater than that of the first gray scale format;
acquiring the brightness value of each gray scale in the second gray scale format through interpolation calculation;
calculating gray scale values to be compensated of the RGB sub-pixels of the gray scales in the second gray scale format under other refresh rates by taking the brightness value of each gray scale in the second gray scale format under the highest refresh rate as a reference brightness value;
and adjusting the same gray scale quantity of each gray scale RGB sub-pixel according to the gray scale value which needs to be compensated of each gray scale RGB sub-pixel in the second gray scale format under other refresh rates so as to generate an RGB brightness correction table corresponding to other refresh rates.
Specifically, referring to fig. 2, fig. 2 is an RGB gray scale table after gray scale expansion according to an embodiment of the invention. As shown in fig. 2, the first gray scale format is expanded to the second gray scale format according to the ACC debugging principle, wherein the first gray scale format is a gray scale format corresponding to an original gray scale of a frame to be displayed, that is, a corresponding 256-level gray scale format (8bit) in fig. 2, wherein the second gray scale format is an expanded gray scale format, that is, a corresponding 4096 gray scale (12bit) in the gray scale format at each refresh rate shown in fig. 2, and the gray scale level of the second gray scale format is greater than that of the first gray scale format, so as to increase the gray scale levels between different brightnesses and facilitate accurate adjustment. In order to obtain the display brightness of each corresponding gray scale after the expanded gray scales at different refresh rates, i.e. the brightness of the same gray scale when RGB is the same, such as the brightness of the 1023 th gray scale after the expanded gray scale is expanded to 4096 gray scales, the brightness value of each gray scale in the first gray scale format under different refresh rates, i.e. the brightness value of each gray scale under the original gray scale (256 gray scales), the brightness value of each gray scale under the second gray scale format is obtained by interpolation calculation, such as the brightness of 16 gray scale under the original gray scale at 144Hz is measured as A, the brightness of 32 gray scale under the original gray scale is measured as B, the brightness of 16 gray scale of the original gray scale after the expanded gray scale corresponds to 256 gray scale under the second gray scale format, the brightness of 32 gray scale of the original gray scale after the expanded gray scale corresponds to 512 gray scale under the second gray scale format, the brightness of the gray scale between the original 16 gray scale and 32 gray scale is expanded to 256, therefore, the brightness value corresponding to each gray scale can be more accurately obtained. After obtaining a more accurate brightness value of each gray scale in the second gray scale format, calculating a gray scale value to be compensated for each gray scale RGB sub-pixel in the second gray scale format at the other refresh rate by using the brightness value of each gray scale in the second gray scale format at the highest refresh rate (144Hz) as a reference brightness value, and then adjusting the same number of gray scales for each gray scale RGB sub-pixel according to the gray scale value to be compensated for each gray scale RGB sub-pixel in the second gray scale format at the other refresh rate to generate an RGB brightness correction table corresponding to the other refresh rate, referring to fig. 3, where fig. 3 is an RGB brightness correction table after gray scale adjustment in an embodiment of the present invention.
To further illustrate that the brightness value of each gray scale in the second gray scale format at the highest refresh rate (144Hz) is used as the reference brightness value, and the gray scale value to be compensated for each gray scale RGB sub-pixel in the second gray scale format at other refresh rates is calculated, the example of adjusting the brightness uniformity of 32 gray scales in the first gray scale format at 48Hz and 60Hz is taken as an example for explanation. Referring to fig. 4 and 5, fig. 4 is a luminance reference table of partial gray scales in the first gray scale format when the refresh rate is 48Hz and 60Hz according to an embodiment of the present invention. FIG. 5 is a luminance reference table of partial gray levels after the first gray level format is expanded to the second gray level format at 48Hz according to an embodiment of the present invention. As shown in FIG. 4, the luminance value of 32 gradations is 6.247 at 48Hz, and 5.622 is the luminance value of 32 gradations at 60Hz, and the higher the luminance value is, the brighter the display is. As shown in fig. 5, after the first gray scale format is expanded to the second gray scale format by the ACC adjustment principle, it can be seen from the table that 32 gray scales under the first gray scale format correspond to 512 gray scales under the second gray scale format, and the brightness value is 6.247 at this time, and in order to make the 32 gray scales under the first gray scale format have the same brightness at 48Hz and 60Hz, 6.247 needs to be reduced to 5.622, and through fig. 4, 482 gray scale brightness values under the second gray scale format at 48Hz are 5.622, so that the gray scale 512 of the second gray scale format corresponding to the 32 gray scales under the first gray scale format at 48Hz can be adjusted to 482, and certainly, in order to ensure that the color is not changed, the gray scale values of RGB with the same gray scale need to be adjusted at the same time, that is 30 gray scales.
In one embodiment, the step of adjusting the same number of gray levels for each gray level RGB sub-pixel according to the gray level value to be compensated of each gray level RGB sub-pixel in the second gray level format at the other refresh rate to generate the RGB brightness correction tables corresponding to the other refresh rate further includes:
and respectively adjusting the gray-scale values of the RGB sub-pixels in the RGB brightness correction table according to the color temperature and the chromaticity requirement.
Specifically, on the basis of adjusting the brightness of the same target gray scale at different refresh rates, the gray scale of R, G, B sub-pixels in the RGB brightness correction table is adjusted according to the color temperature and chromaticity requirements, and the RGB brightness correction table is substantially the ACC color correction table (achieving both color and brightness adjustment).
In one embodiment, the step of calling the corresponding RGB brightness correction table stored in advance according to the refresh rate of the frame to be displayed includes:
comparing the refresh rate of the frame picture to be displayed with the refresh rate of the current display frame picture;
when the refresh rate of the frame picture to be displayed is different from the refresh rate of the current display frame picture, judging whether the refresh rate of the frame picture to be displayed is the highest refresh rate or not;
and when the refresh rate of the frame picture to be displayed is not the highest refresh rate, calling a pre-stored RGB brightness correction table corresponding to the refresh rate of the frame picture to be displayed.
Specifically, since the inventive concept of the present application is to perform adjustment based on the luminance at the high refresh rate, only the luminance of the same target gray scale at each low refresh rate needs to be adjusted.
In one embodiment, the method for driving a display panel further includes:
and when the refresh rate of the frame picture to be displayed is the highest refresh rate, maintaining the original gray scale of the frame picture to be displayed for outputting.
Specifically, the ACC function is not required to be started when the refresh rate of the frame to be displayed is the highest refresh rate, that is, the RGB brightness correction table is called, and of course, the corresponding brightness correction table may also be stored, and only the frame frequency conversion is performed or the original gray scale of the frame to be displayed is maintained for output, that is, the RGB gray scales corresponding to the target gray scales (the first gray scale format) converted into the second gray scale format are not adjusted.
Step S3: outputting the frame picture to be displayed after the gray scale is adjusted; when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of the RGB sub-pixels when the refresh rate in the same gray scale is switched so as to keep the display brightness balance.
Specifically, when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used to adjust the output gray scale of the RGB sub-pixels (the output gray scale is also the gray scale after the adjustment of the original gray scale) when the refresh rate in the same gray scale is switched, so as to keep the display brightness balanced.
It should be noted that the frame picture to be displayed after the gray scale adjustment is output may be a driving signal for producing and outputting the frame picture to be displayed, so as to drive the frame picture to be displayed to display.
In summary, in the driving method of the display panel according to the embodiment of the present invention, by obtaining the refresh rate of the frame to be displayed, when the refresh rate of the frame to be displayed is not the highest refresh rate, the corresponding RGB brightness correction tables stored in advance are called according to the refresh rate of the frame to be displayed, the gray scale of the frame to be displayed is adjusted, and then the frame to be displayed after the gray scale is adjusted is output, where when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of the RGB sub-pixels when the refresh rate in the same gray scale is switched, so as to keep the display brightness balanced. Different RGB brightness correction tables are called when the refresh rate in the same gray scale is switched, the output gray scale of RGB sub-pixels in a frame to be displayed is adjusted, the display brightness balance under different refresh rates is kept, the picture flicker phenomenon when the refresh rate in the same gray scale is switched is eliminated, and the product quality and the user experience are improved.
In an embodiment, the display panel driving apparatus includes a memory and a processor, where the memory stores at least one program instruction, and the processor loads and executes the at least one program instruction to implement the display panel driving method according to any of the above embodiments.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a driving device of a display panel according to an embodiment of the present invention. As shown in fig. 6, the driving apparatus of the display panel includes:
the detection module 10 is used for acquiring the refresh rate of a frame picture to be displayed;
the selection module 11 is configured to, when the refresh rate of the frame picture to be displayed is a non-highest refresh rate, call a pre-stored corresponding RGB brightness correction table according to the refresh rate of the frame picture to be displayed;
the adjusting module 12 is configured to adjust a gray scale of a frame to be displayed according to the called pre-stored corresponding RGB brightness correction table;
and the driving module 13 is used for outputting the frame picture to be displayed after the gray scale is adjusted.
And the storage module 14 is configured to store RGB brightness correction tables, where when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used to adjust the output gray levels of the RGB sub-pixels when the refresh rates in the same gray level are switched, so as to maintain display brightness balance.
In one embodiment, the storage module 15 includes a register and an external memory, the detection module 10, the selection module 11, the adjustment module 12, the register and/or the driving module 13 are all disposed in a Timing Controller (TCON), the external memory may be a flash or an EEPROM, the RGB brightness correction table is pre-stored in the external memory, and the RGB brightness correction table in the external memory is downloaded to the register in the TCON when the TCON is started.
It should be noted that, the principle and the working process of the driving apparatus of the display panel provided in this embodiment may refer to the driving method of the display panel, which is not described herein again.
In summary, the driving apparatus for a display panel according to the embodiments of the present invention obtains the refresh rate of the frame to be displayed, calls the pre-stored corresponding RGB brightness correction tables according to the refresh rate of the frame to be displayed when the refresh rate of the frame to be displayed is not the highest refresh rate, adjusts the gray scale of the frame to be displayed, and then outputs the frame to be displayed after adjusting the gray scale, where when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used to adjust the output gray scale of the RGB sub-pixels when the refresh rate in the same gray scale is switched, so as to keep the display brightness balanced. Different RGB brightness correction tables are called when the refresh rate in the same gray scale is switched, the output gray scale of RGB sub-pixels in a frame to be displayed is adjusted, the display brightness balance under different refresh rates is kept, the picture flicker phenomenon when the refresh rate in the same gray scale is switched is eliminated, and the product quality and the user experience are improved.
An embodiment of the present invention further provides a display device including the driving device of the display panel according to any one of the above embodiments.
Specifically, 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.
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 method of driving a display panel, comprising:
obtaining the refresh rate of a frame to be displayed;
when the refresh rate of the frame picture to be displayed is not the highest refresh rate, calling a corresponding pre-stored RGB brightness correction table according to the refresh rate of the frame picture to be displayed so as to adjust the gray scale of the frame picture to be displayed;
outputting the frame picture to be displayed after the gray scale is adjusted;
when the refresh rate is not the highest refresh rate, different refresh rates correspond to different RGB brightness correction tables, and the different RGB brightness correction tables are used for adjusting the output gray scale of the RGB sub-pixels when the refresh rate in the same gray scale is switched so as to keep the display brightness balance.
2. The method according to claim 1, wherein the refresh rate of the frame picture to be displayed includes at least two refresh rates.
3. The method as claimed in claim 1, wherein the step of calling up the corresponding RGB brightness correction tables stored in advance according to the refresh rate of the frame to be displayed further comprises:
acquiring brightness values of all gray scales of a first gray scale format under different refresh rates, wherein the first gray scale format is a gray scale format corresponding to an original gray scale of the frame picture to be displayed;
expanding the first gray scale format into a second gray scale format according to an ACC algorithm, wherein the gray scale level of the second gray scale format is greater than that of the first gray scale format;
acquiring the brightness value of each gray scale in the second gray scale format through interpolation calculation;
calculating gray scale values to be compensated of the RGB sub-pixels of each gray scale of the second gray scale format at other refresh rates by taking the brightness value of each gray scale of the second gray scale format at the highest refresh rate as a reference brightness value;
and adjusting the same gray scale quantity of each gray scale RGB sub-pixel according to the gray scale value which needs to be compensated of each gray scale RGB sub-pixel in the second gray scale format under other refresh rates so as to generate the RGB brightness correction table corresponding to other refresh rates.
4. The method as claimed in claim 3, wherein the step of adjusting the same number of gray levels for each gray level RGB sub-pixel according to the gray level value to be compensated for by each gray level RGB sub-pixel of the second gray level format at other refresh rates to generate the RGB brightness correction tables corresponding to other refresh rates further comprises:
and respectively adjusting the gray-scale values of the RGB sub-pixels in the RGB brightness correction table according to the color temperature and the chromaticity requirement.
5. The method according to claim 3, wherein the gray scale level of the first gray scale format is 256 gray scales, and the gray scale level of the second gray scale format is 4096 gray scales.
6. The method for driving a display panel according to claim 1, wherein the step of obtaining the refresh rate of the frame picture to be displayed comprises:
acquiring a data signal of the frame picture to be displayed;
and determining the refresh rate of the frame picture to be displayed according to the frame starting signal in the data signal.
7. The method as claimed in claim 1, wherein the step of calling up the corresponding RGB brightness correction tables stored in advance according to the refresh rate of the frame picture to be displayed comprises:
comparing the refresh rate of the frame picture to be displayed with the refresh rate of the current display frame picture;
when the refresh rate of the frame picture to be displayed is different from the refresh rate of the current display frame picture, judging whether the refresh rate of the frame picture to be displayed is the highest refresh rate;
and calling a pre-stored RGB brightness correction table corresponding to the refresh rate of the frame picture to be displayed when the refresh rate of the frame picture to be displayed is not the highest refresh rate.
8. The method for driving a display panel according to claim 1, further comprising:
and when the refresh rate of the frame picture to be displayed is the highest refresh rate, maintaining the original gray scale of the frame picture to be displayed for outputting.
9. A driving apparatus of a display panel, comprising a memory and a processor, wherein the memory stores at least one program instruction, and the processor implements the driving method of the display panel according to any one of claims 1 to 8 by loading and executing the at least one program instruction.
10. A display device characterized by comprising a driving device of the display panel according to claim 9.
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| CN114093330A (en) * | 2021-11-05 | 2022-02-25 | 深圳Tcl数字技术有限公司 | Brightness adjusting method and device, display equipment and computer readable storage medium |
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