CN111063288A - Driving method and driving device of display panel - Google Patents
Driving method and driving device of display panel Download PDFInfo
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- CN111063288A CN111063288A CN201911340173.7A CN201911340173A CN111063288A CN 111063288 A CN111063288 A CN 111063288A CN 201911340173 A CN201911340173 A CN 201911340173A CN 111063288 A CN111063288 A CN 111063288A
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- 238000012360 testing method Methods 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- 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
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
Abstract
The invention discloses a driving method and a driving device of a display panel, wherein the driving method comprises the following steps: determining a target refreshing frequency of a display panel according to image data to be displayed; accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval, wherein the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, and the driving voltage data corresponding to the sub-frequency intervals with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with lower frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying. The method ensures that the brightness difference of the display panel in each sub-frequency interval is kept at a small value, and the brightness in different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the picture flicker problem caused by overlarge brightness change.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a driving method and a driving apparatus for a display panel.
Background
The electronic contest industry develops rapidly, and the development of the electronic contest display panel applied to the electronic contest industry is driven. In order to adapt to the characteristics of high refreshing frequency and frequency conversion of game pictures, FreeSesync (adaptive synchronization technology) technology is rapidly developed and widely applied.
The FreeSesync technology requires that the display panel can realize a frequency conversion function, and the frequency of a screen display picture is automatically matched with the frequency of a picture output by the display card. However, in the FreeSeync technique, at different frequencies, within one frame time, a low-frequency blank period (V-blank) is longer than a high-frequency blank period, and a Thin Film Transistor (TFT) leakage time is lengthened, which causes the low-frequency picture brightness to be lower than the high frequency, and the picture flicker is reflected in the subjective feeling of human eyes.
Therefore, the display panel of the conventional FreeSesync technology has a problem of screen flicker.
Disclosure of Invention
The invention provides a driving method and a driving device of a display panel, which aim to solve the problem of picture flicker of the display panel of the conventional FreeSesync technology.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a driving method of a display panel, which comprises the following steps:
determining a target refreshing frequency of a display panel according to image data to be displayed;
accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with lower frequency;
and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying.
In the driving method provided by the present invention, after the step of determining the refresh frequency of the display panel according to the image data to be displayed, the driving method further includes:
judging whether the target refreshing frequency is the same as the current refreshing frequency of the display panel or not;
and if the judgment results are different, executing the step of accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval.
In the driving method provided by the present invention, the step of accessing the driving voltage database, determining the frequency interval in which the target refresh frequency is located, and extracting the driving voltage data corresponding to the frequency interval includes:
accessing a drive voltage database;
matching the target refreshing frequency with a sub-frequency interval in the driving voltage database to obtain a target sub-frequency interval;
and extracting the driving voltage data corresponding to the target sub-frequency interval as the driving voltage data corresponding to the target refreshing frequency.
In the driving method provided by the invention, the sizes of the sub-frequency intervals are the same.
In the driving method provided by the invention, at least two sub-frequency intervals have different sizes.
In the driving method provided by the present invention, the driving method further includes building a driving voltage database in advance, and the building of the driving voltage database includes:
obtaining a refreshing frequency interval of a display panel;
dividing the refreshing frequency interval to obtain at least two sub-frequency intervals;
acquiring driving voltage data corresponding to the sub-frequency interval;
and matching the sub-frequency interval with the driving voltage data corresponding to the sub-frequency interval to obtain a driving voltage database.
In the driving method provided by the present invention, the step of obtaining the driving voltage data corresponding to the sub-frequency interval includes:
taking a display brightness of the display panel as a standard brightness;
and testing to obtain the display panel, displaying the corresponding driving voltage data in the standard brightness at the preset frequency in the sub-frequency interval, and taking the driving voltage data as the driving voltage data corresponding to the sub-frequency interval.
In the driving method provided by the present invention, the predetermined frequency is a minimum frequency.
In the driving method provided by the present invention, the predetermined frequency is a maximum frequency.
Meanwhile, the present invention also provides a driving apparatus of a display panel, which includes:
the determining unit is used for determining the target refreshing frequency of the display panel according to the image data to be displayed;
the extraction unit is used for accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with lower frequency;
and the output unit is used for outputting the driving voltage signal corresponding to the voltage data to the display panel.
The invention has the beneficial effects that: the invention provides a driving method and a driving device of a display panel, wherein the driving method comprises the following steps: determining a target refreshing frequency of a display panel according to image data to be displayed; accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval, wherein the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, and the driving voltage data corresponding to the sub-frequency intervals with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with lower frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying. The method ensures that the brightness difference of the display panel in each sub-frequency interval is kept at a small value, and the brightness in different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the picture flicker problem caused by overlarge brightness change.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a graph of refresh frequency versus brightness of a display panel;
fig. 2 is a first flowchart of a driving method of a display panel according to an embodiment of the invention;
fig. 3 is a second flowchart of a driving method of a display panel according to an embodiment of the invention;
FIG. 4 is a graph illustrating a relationship between a frequency and a luminance of a first driving method for a display panel according to an embodiment of the present invention;
FIG. 5 is a graph illustrating a relationship between a frequency and a luminance of a second driving method for a display panel according to an embodiment of the present invention;
FIG. 6 is a graph illustrating the relationship between the frequency and the luminance of a third driving method for a display panel according to an embodiment of the present invention;
fig. 7 is a block diagram of a driving apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
While the embodiments and/or examples of the present invention will be described in detail and fully with reference to the specific embodiments thereof, it should be understood that the embodiments and/or examples described below are only a part of the embodiments and/or examples of the present invention and are not intended to limit the scope of the invention. All other embodiments and/or examples, which can be obtained by a person skilled in the art without making any inventive step, based on the embodiments and/or examples of the present invention, belong to the scope of protection of the present invention.
Directional terms used in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terminology is used for the purpose of describing and understanding the invention and is in no way limiting. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
FIG. 1 is a graph showing the relationship between the refresh frequency and the brightness of a display panel under the same driving voltage signal, wherein for the display panel with a refresh frequency interval of 48Hz to 165Hz, the brightness of the display panel increases with the increase of the refresh frequency, and when the frequency is 48Hz, the brightness is α, and when the frequency is 165Hz, the brightness is α + β.
Therefore, the invention provides a driving method of a display panel, which is used for relieving the problem of image flicker caused by overlarge brightness change of the conventional FreeSeync display panel. As shown in fig. 2, the driving method of the display panel according to the embodiment of the present invention includes:
s201, determining a target refreshing frequency of a display panel according to image data to be displayed;
s202, accessing a driving voltage database, judging a frequency interval where a target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with lower frequency;
and S203, outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying.
The present embodiment provides a driving method for a display panel, which keeps the luminance difference of the display panel in each sub-frequency interval at a small value, and the luminance between different sub-frequency intervals is similar, thereby reducing the luminance difference of the entire display panel and alleviating the problem of image flicker caused by too large luminance change.
The following will describe in detail the driving method of the display panel provided by the present invention, taking the display panel with a frequency interval of 48Hz to 165Hz as an example.
In an embodiment, after the step S201 determines the refresh frequency of the display panel according to the image data to be displayed, the driving method of the display panel provided by the present invention further includes:
judging whether the target refreshing frequency is the same as the current refreshing frequency of the display panel or not;
if the judgment results are the same, the step S202 does not need to be carried out to access the driving voltage database, the frequency interval where the target refreshing frequency is located is judged, and the driving voltage data corresponding to the frequency interval is extracted; directly outputting a driving voltage signal corresponding to the current refreshing frequency to a display panel;
if the determination results are not the same, step S202 is executed to access the driving voltage database, determine the frequency interval where the target refresh frequency is located, and extract the driving voltage data corresponding to the frequency interval.
In another embodiment, after determining the refresh frequency of the display panel according to the image data to be displayed in step S201, no matter whether the target refresh frequency of the display panel is the same as the current refresh frequency of the display panel, directly performing step S202 to access the driving voltage database, determining the frequency interval where the target refresh frequency is located, and extracting the driving voltage data corresponding to the frequency interval.
In an embodiment, the step S202 of accessing the driving voltage database, determining a frequency interval where the target refresh frequency is located, and extracting the driving voltage data corresponding to the frequency interval includes:
accessing a drive voltage database;
matching the target refreshing frequency with the sub-frequency interval in the driving voltage database to obtain a target sub-frequency interval;
and extracting the driving voltage data corresponding to the target sub-frequency interval as the driving voltage data corresponding to the target refreshing frequency.
In one embodiment, the sub-frequency bins are all the same size.
In another embodiment, there are at least two sub-frequency bins that are not the same size.
In an embodiment, the driving method of the display panel further includes building a driving voltage database in advance, and as shown in fig. 3, the step of building the driving voltage database in advance includes:
s301, obtaining a refreshing frequency interval of the display panel;
s302, dividing a refreshing frequency interval to obtain at least two sub-frequency intervals;
s303, acquiring driving voltage data corresponding to the sub-frequency interval;
s304, matching the sub-frequency intervals with the driving voltage data corresponding to the sub-frequency intervals to obtain a driving voltage database.
In step S301, the refresh frequency interval obtained according to the application of the display panel, such as a notebook, is 48Hz to 165Hz, wherein when the refresh frequency is reduced to 48Hz, the power consumption of the display panel can be reduced, and the service life of the battery of the notebook can be prolonged; when the refresh frequency is increased to 165Hz, the display effect of the display panel can be improved. In the embodiment of the invention, the refresh frequency interval of the display panel is exemplified by 48Hz to 165 Hz.
In step S302, the larger the difference of the refresh frequency of the display panel is under the same driving voltage signal, the larger the difference of the brightness of the display panel is. Therefore, the size of the sub-frequency interval determines the brightness difference of the display panel in the sub-frequency interval, and the larger the sub-frequency interval is, the larger the brightness difference of the display panel in the sub-frequency interval is; the size of the sub-frequency interval refers to the difference between the maximum frequency and the minimum frequency in the sub-frequency interval.
For example, for the display panel in the embodiment of the present invention, the brightness difference of the display panel needs to be controlled to be less than or equal to β/2, and the size of the sub-frequency interval needs to be controlled not to exceed 58.5 Hz.
Then, the refresh frequency interval is divided according to the size of the sub-frequency interval.
In one embodiment, the refresh frequency interval is divided equally, and the division can be set according to the requirement, and the more the division, the more the number of sub-frequency intervals, the smaller the single sub-frequency interval. As shown in fig. 4, the refresh frequency interval is divided equally into two equal parts, the sub-frequency intervals include a first sub-frequency interval of 48Hz to 106.5Hz and a second sub-frequency interval of 106.5Hz to 165Hz, and the sizes of the sub-frequency intervals are 58.5 Hz. As shown in fig. 5, the refresh frequency interval is equally divided into three equal parts, the sub-frequency intervals include a third sub-frequency interval of 48Hz to 87Hz, a fourth sub-frequency interval of 87Hz to 126Hz, and a fifth sub-frequency interval of 126Hz to 165Hz, and the sizes of the sub-frequency intervals are all 39 Hz.
In another embodiment, the refresh frequency interval is divided unequally, i.e. there are at least two sub-frequency intervals of different size. As shown in fig. 5, the refresh frequency interval is divided unequally, the sub-frequency intervals include a sixth sub-frequency interval of 48Hz to 106.5Hz, a seventh sub-frequency interval of 106.5Hz to 135.75Hz, and an eighth sub-frequency interval of 135.75Hz to 165Hz, the sixth sub-frequency interval is 58.5Hz, and the seventh sub-frequency interval and the eighth sub-frequency interval are both 29.25 Hz.
It should be noted that, the larger the number of sub-frequency sections is, the larger the corresponding driving voltage data amount is, the driving voltage data is a program file stored in a driving IC (Integrated Circuit), and the larger the driving voltage data amount is, the larger the memory requirement for the driving IC is. According to the invention, the refreshing frequency of the display panel is divided into a plurality of sub-frequency intervals, and one sub-frequency interval corresponds to one driving voltage data, so that the requirement on the memory of the driving IC is effectively reduced, and the production cost is reduced.
In step S303, the step of acquiring the driving voltage data corresponding to the sub-frequency interval includes:
taking a display brightness of the display panel as a standard brightness;
and testing to obtain the display panel, displaying the corresponding driving voltage data in the standard brightness at the preset frequency in the sub-frequency interval, and taking the driving voltage data as the driving voltage data corresponding to the sub-frequency interval.
In one embodiment, as shown in fig. 4, the standard brightness is α, the predetermined frequency is the minimum frequency, the test display panel displays the driving voltage data a corresponding to the standard brightness α at the first minimum frequency of 48Hz, the driving voltage data a is used as the driving voltage data corresponding to the first sub-frequency interval of 48Hz to 106.5Hz, the test display panel displays the driving voltage data b corresponding to the standard brightness α at the second minimum frequency of 106.5Hz, and the driving voltage data b is used as the driving voltage data corresponding to the first sub-frequency interval of 48Hz to 106.5 Hz.
In another embodiment, as shown in fig. 5, the test display panel displays driving voltage data c corresponding to the standard brightness α + β/2 at the third intermediate frequency of 67.5Hz, the driving voltage data c is used as driving voltage data corresponding to the third sub-frequency interval of 48Hz to 87Hz, the test display panel displays driving voltage data d corresponding to the standard brightness of α + β/2 at the fourth intermediate frequency of 106.5Hz, the driving voltage data d is used as driving voltage data corresponding to the fourth sub-frequency interval of 87Hz to 126Hz, and the test display panel displays driving voltage data e corresponding to the standard brightness of α + β/2 at the fifth intermediate frequency of 145.5Hz, and the driving voltage data e is used as driving voltage data corresponding to the fifth sub-frequency interval of 126Hz to 165 Hz.
In another embodiment, as shown in fig. 6, the standard brightness is α + β, the predetermined frequency is the maximum frequency, the test display panel displays the driving voltage data f corresponding to the standard brightness β at the sixth maximum frequency of 106.5Hz, the driving voltage data f is used as the driving voltage data corresponding to the sixth sub-frequency interval of 48Hz to 106.5Hz, the test display panel displays the driving voltage data g corresponding to the standard brightness β at the seventh maximum frequency of 135.75Hz, the driving voltage data g is used as the driving voltage data corresponding to the seventh sub-frequency interval of 106.5Hz to 135.75Hz, the test display panel displays the driving voltage data h corresponding to the standard brightness of α + β at the eighth maximum frequency of 135.75Hz, and the driving voltage data h is used as the driving voltage data corresponding to the eighth sub-frequency interval of 135.75Hz to 165 Hz.
The following further explains the driving method of the display panel according to the present invention with the brightness display result of the display panel.
In an embodiment, as shown in fig. 4, fig. 4 is a graph of luminance versus frequency of a display panel according to a first embodiment of a driving method of a display panel provided by the present invention, where a driving voltage database includes a first sub-frequency interval of 48Hz to 106.5Hz and a second sub-frequency interval of 106.5Hz to 165Hz, driving voltage data corresponding to the first sub-frequency interval is a, and driving voltage data corresponding to the second sub-frequency interval is b, the driving method provided by the present invention is used to drive the display panel, where the luminance interval of the display panel in the first sub-frequency interval is α to α + α 0/2, the luminance difference is β/2, the luminance interval of the display panel in the second sub-frequency interval is α to α + β/2, the luminance difference is β/2, the luminance of the display panel in the first sub-frequency interval and the second sub-frequency interval is similar, and the maximum luminance difference between the intervals is β/2.
In another embodiment, as shown in fig. 5, fig. 5 is a graph showing luminance versus frequency of a display panel according to a second embodiment of a driving method of a display panel provided by the present invention, wherein the driving voltage database includes a third sub-frequency section 48Hz to 87Hz, a fourth sub-frequency section 87Hz to 126Hz, and a fifth sub-frequency section 126Hz to 165Hz, the driving voltage data corresponding to the third sub-frequency section is c, the driving voltage data corresponding to the fourth sub-frequency section is d, and the driving voltage data corresponding to the fifth sub-frequency section is e.the driving method provided by the present invention is used to drive the display panel, the luminance section of the display panel in the third sub-frequency section is α + β/3 to β +2 β 1/3, the luminance difference is β 3/3, the luminance section of the display panel in the fourth sub-frequency section is β + β 4/3 to α +2 β 5/3, the luminance difference is β 6/3, the luminance section of the display panel in the fifth sub-frequency section is α + β 7/3 to α + 2/3, the luminance section in the fourth sub-frequency section is 463, the luminance difference is β to reduce the luminance difference of the display panel in the third sub-frequency section, and the luminance difference is further compared with the luminance section of the display panel, the luminance difference provided by comparing the third sub-frequency section, the embodiment, the luminance difference provided by the method, and the embodiment, the method, the third sub-frequency section, the luminance difference is further reducing the luminance difference provided by.
In yet another embodiment, as shown in fig. 6, fig. 6 is a graph of luminance versus frequency of a display panel according to a third embodiment of a driving method of a display panel provided by the present invention, where the driving voltage database includes a sixth sub-frequency section of 48Hz to 106.5Hz, a seventh sub-frequency section of 106.5Hz to 135.75Hz, and an eighth sub-frequency section of 135.75Hz to 165Hz, the driving voltage data corresponding to the sixth sub-frequency section is f, the driving voltage data corresponding to the seventh sub-frequency section is g, and the driving voltage data corresponding to the eighth sub-frequency section is h, the driving method provided by the present invention is used to drive the display panel, the luminance section of the display panel in the sixth sub-frequency section is α + β/2 to 960 + β, the luminance difference is β 3/2, the luminance section of the display panel in the seventh sub-frequency section is β +3 to α + β, the luminance difference is β 6/4, the luminance difference of the display panel in the eighth sub-frequency section is α + 633 to 68692, the luminance difference of the display panel in the eighth sub-frequency section is reduced to the maximum luminance difference of the display panel in the flicker frequency section, and the display panel is provided by the method provided by the seventh sub-frequency section of the display panel in which is shown by the seventh sub-frequency section of the present embodiment, the flicker frequency section, the present invention, the display panel, and the display panel, the display panel.
Meanwhile, an embodiment of the present invention provides a driving apparatus for a display panel, for implementing the driving method for the display panel, as shown in fig. 7, the driving apparatus 70 includes:
the determining unit 710 is configured to determine a target refresh frequency of the display panel according to the image data to be displayed.
An extracting unit 720, configured to access the driving voltage database, determine a frequency interval where the target refresh frequency is located, and extract driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with the higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with the lower frequency.
The output unit 730 is configured to output a driving voltage signal corresponding to the driving voltage data to the display panel.
The present embodiment provides a driving apparatus for a display panel, which implements the above-mentioned driving method for a display panel, so that the luminance difference of the display panel in each sub-frequency interval is kept at a small value, and the luminance between different sub-frequency intervals is similar, thereby reducing the luminance difference of the whole display panel, and alleviating the problem of image flicker caused by too large luminance change.
In one embodiment, the determining unit 710 includes a determining module for determining whether the target refresh frequency is the same as the current refresh frequency of the display panel.
In one embodiment, the extraction unit 720 includes:
and the access module is used for accessing the driving voltage database.
And the matching module is used for matching the target refreshing frequency with the sub-frequency interval in the driving voltage database to obtain a target sub-frequency interval.
And the extraction module is used for extracting the driving voltage data corresponding to the target sub-frequency interval as the driving voltage data corresponding to the target refreshing frequency.
In one embodiment, the driving device 70 further includes a driving voltage database construction unit.
In one embodiment, the driving voltage database building unit includes:
the first acquisition module is used for acquiring a refreshing frequency interval of the display panel;
the dividing module is used for dividing the refreshing frequency interval to obtain at least two sub-frequency intervals;
the second acquisition module is used for acquiring driving voltage data corresponding to the sub-frequency interval;
and the building module is used for matching the sub-frequency interval with the driving voltage data corresponding to the sub-frequency interval to obtain a driving voltage database.
In one embodiment, the second obtaining module includes:
the acquisition submodule is used for acquiring a display brightness of the display panel as a standard brightness;
and the test submodule is used for testing to obtain the display panel, displaying the corresponding driving voltage data in the standard brightness at the preset frequency in the sub-frequency interval, and taking the driving voltage data as the driving voltage data corresponding to the sub-frequency interval.
According to the above embodiments:
the embodiment of the invention provides a driving method and a driving device of a display panel, wherein the driving method comprises the following steps: determining a target refreshing frequency of a display panel according to image data to be displayed; accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval, wherein the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, and the driving voltage data corresponding to the sub-frequency intervals with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with lower frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying. The method ensures that the brightness difference of the display panel in each sub-frequency interval is kept at a small value, and the brightness in different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the picture flicker problem caused by overlarge brightness change.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A method of driving a display panel, comprising:
determining a target refreshing frequency of a display panel according to image data to be displayed;
accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with lower frequency;
and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for displaying.
2. The driving method according to claim 1, wherein after the step of determining the refresh frequency of the display panel based on the image data to be displayed, the driving method further comprises:
judging whether the target refreshing frequency is the same as the current refreshing frequency of the display panel or not;
and if the judgment results are different, executing the step of accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval.
3. The driving method according to claim 1, wherein the step of accessing the driving voltage database, determining a frequency interval in which the target refresh frequency is located, and extracting the driving voltage data corresponding to the frequency interval comprises:
accessing a drive voltage database;
matching the target refreshing frequency with a sub-frequency interval in the driving voltage database to obtain a target sub-frequency interval;
and extracting the driving voltage data corresponding to the target sub-frequency interval as the driving voltage data corresponding to the target refreshing frequency.
4. The driving method according to claim 1, wherein the sizes of the sub-frequency intervals are all the same.
5. The driving method as claimed in claim 4, wherein there are at least two of said sub-frequency intervals which are not the same size.
6. The driving method of claim 1, further comprising building a driving voltage database in advance, the step of building the driving voltage database comprising:
obtaining a refreshing frequency interval of a display panel;
dividing the refreshing frequency interval to obtain at least two sub-frequency intervals;
acquiring driving voltage data corresponding to the sub-frequency interval;
and matching the sub-frequency interval with the driving voltage data corresponding to the sub-frequency interval to obtain a driving voltage database.
7. The driving method according to claim 6, wherein the step of acquiring the driving voltage data corresponding to the sub-frequency bins comprises:
taking a display brightness of the display panel as a standard brightness;
and testing to obtain the display panel, displaying the corresponding driving voltage data in the standard brightness at the preset frequency in the sub-frequency interval, and taking the driving voltage data as the driving voltage data corresponding to the sub-frequency interval.
8. The driving method according to claim 7, wherein the predetermined frequency is a minimum frequency.
9. The driving method according to claim 7, wherein the predetermined frequency is a maximum frequency.
10. A driving apparatus of a display panel, comprising:
the determining unit is used for determining the target refreshing frequency of the display panel according to the image data to be displayed;
the extraction unit is used for accessing a driving voltage database, judging a frequency interval where the target refreshing frequency is located, and extracting driving voltage data corresponding to the frequency interval; the driving voltage database comprises at least two sub-frequency intervals and driving voltage data corresponding to the sub-frequency intervals, wherein the driving voltage data corresponding to the sub-frequency interval with higher frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with lower frequency;
and the output unit is used for outputting the driving voltage signal corresponding to the voltage data to the display panel.
Priority Applications (1)
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| CN111063288B (en) | 2024-04-02 |
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