CN111063288B - Driving method and driving device of display panel - Google Patents
Driving method and driving device of display panel Download PDFInfo
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- CN111063288B CN111063288B CN201911340173.7A CN201911340173A CN111063288B CN 111063288 B CN111063288 B CN 111063288B CN 201911340173 A CN201911340173 A CN 201911340173A CN 111063288 B CN111063288 B CN 111063288B
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 claims description 13
- 239000000284 extract Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 2
- 230000003044 adaptive effect Effects 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
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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 refresh frequency of the display panel according to the image data to be displayed; accessing a driving voltage database, judging a frequency interval in which a target refresh 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 interval with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with smaller frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for display. 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 between different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the problem of picture flickering 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 device for a display panel.
Background
The electronic competition industry develops rapidly, and drives the development of an electronic competition display panel applied to the electronic competition industry. In order to adapt to the characteristics of high refresh frequency and variable frequency of game pictures, the FreeSYNC (adaptive synchronization technology) technology is rapidly developed and widely applied.
The Freesync technology requires that the display panel can realize a variable frequency function, and the frequency of a screen display picture automatically matches the frequency of a picture output by a display card. However, the FreeSync technique lengthens the leakage time of the thin film transistor (Thin Film Transistor, TFT) at different frequencies, with a longer blanking period (V-blank) at low frequencies than at high frequencies within a frame time, which results in lower picture brightness at low frequencies than at high frequencies, and is perceived subjectively as picture flicker by the human eye.
Therefore, the display panel of the conventional FreeSync technology has a problem of flickering of the screen.
Disclosure of Invention
The invention provides a driving method and a driving device of a display panel, which are used for solving the problem that the display panel of the existing Freesync technology has picture flickering.
In order to solve the 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 refresh frequency of the display panel according to the image data to be displayed;
accessing a driving voltage database, judging a frequency interval in which the target refresh 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 intervals with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with smaller frequency;
and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for display.
In the driving method provided by the 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 comprises:
judging whether the target refresh frequency is the same as the current refresh frequency of the display panel;
if the judgment result is different, the executing step accesses a driving voltage database, judges the frequency interval where the target refresh frequency is located, and extracts driving voltage data corresponding to the frequency interval.
In the driving method provided by the invention, the steps of accessing the driving voltage database, judging the frequency interval where the target refresh frequency is located, and extracting the driving voltage data corresponding to the frequency interval comprise the following steps:
accessing a driving voltage database;
matching the target refresh 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 to serve as driving voltage data corresponding to the target refresh 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 are different in size.
In the driving method provided by the invention, the driving method further comprises the step of pre-constructing a driving voltage database, and the step of constructing the driving voltage database comprises the following steps:
acquiring a refresh 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 invention, the step of acquiring the driving voltage data corresponding to the sub-frequency interval comprises the following steps:
taking a display brightness of the display panel as standard brightness;
and testing to obtain the display panel, displaying the driving voltage data corresponding to 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 invention, the predetermined frequency is the minimum frequency.
In the driving method provided by the invention, the predetermined frequency is the maximum frequency.
Meanwhile, the present invention also provides a driving device of a display panel, comprising:
a determining unit for determining a target refresh frequency of the display panel according to the image data to be displayed;
the extraction unit is used for accessing the driving voltage database, judging the 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 intervals with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with smaller frequency;
and the output unit is used for outputting a driving voltage signal corresponding to the voltage data to the display panel.
The beneficial effects of the invention are as follows: 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 refresh frequency of the display panel according to the image data to be displayed; accessing a driving voltage database, judging a frequency interval in which a target refresh 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 interval with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with smaller frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for display. 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 between different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the problem of picture flickering caused by overlarge brightness change.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a graph showing the relationship between refresh rate and 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 present invention;
fig. 3 is a second flowchart of a driving method of a display panel according to an embodiment of the present invention;
FIG. 4 is a graph showing a relationship between frequency and brightness of a driving method of a first display panel according to an embodiment of the present invention;
FIG. 5 is a graph showing the relationship between the frequency and the brightness of a driving method of a second display panel according to an embodiment of the present invention;
FIG. 6 is a graph showing a relationship between frequency and brightness of a driving method of a third display panel according to an embodiment of the present invention;
fig. 7 is a block diagram of a driving apparatus for a display panel according to an embodiment of the present invention.
Detailed Description
The following description of the present embodiments and/or examples will be provided for clarity and completeness of the description of the present embodiments and/or examples, and it is apparent that the embodiments and/or examples described below are merely some, but not all, embodiments and/or examples of the present invention. All other embodiments and/or examples, which a person of ordinary skill in the art would achieve without undue burden, are within the scope of the invention based on embodiments and/or examples in the present invention.
The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], etc., are only referring to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not intended to be limiting. The terms "first," "second," and the like 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 defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
Due to the effects of the FreeSync principle, there are differences in brightness of the display panel at different frequencies. As shown in fig. 1, fig. 1 is a graph of the refresh frequency versus brightness of a display panel under the same driving voltage signal. For the display panel with the refresh frequency interval of 48 Hz-165 Hz, the brightness of the display panel increases along with the rise of the refresh frequency under the same gray-scale picture, when the frequency is 48Hz, the brightness is alpha, and when the frequency is 165Hz, the brightness is alpha+beta. The brightness of the display panel is related to the driving voltage signal of the display panel at the same time, and the brightness increases with the increase of the driving voltage signal at the same frequency.
Therefore, the invention provides a driving method of a display panel, so as to relieve the problem of picture flickering caused by overlarge brightness change of the display panel of the existing Freesync technology. As shown in fig. 2, the driving method of the display panel provided in the embodiment of the invention includes:
s201, determining a target refresh frequency of a display panel according to image data to be displayed;
s202, accessing a driving voltage database, judging a frequency interval in which a target refresh 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 intervals with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with smaller frequency;
s203, outputting a driving voltage signal corresponding to the driving voltage data to the display panel for display.
The embodiment provides a driving method of a display panel, which keeps the brightness difference of the display panel in each sub-frequency interval at a smaller value and the brightness between different sub-frequency intervals is similar, so that the brightness difference of the whole display panel is reduced, and the problem of picture flickering caused by overlarge brightness change is relieved.
The method for driving the display panel provided by the invention will be described in detail below by taking a display panel with a frequency range of 48 Hz-165 Hz as an example.
In one embodiment, after determining the refresh frequency of the display panel according to the image data to be displayed in step S201, the driving method of the display panel provided by the present invention further includes:
judging whether the target refresh frequency is the same as the current refresh frequency of the display panel;
if the judgment result is the same, the step S202 is not needed to access the driving voltage database, the frequency interval where the target refresh frequency is located is judged, and driving voltage data corresponding to the frequency interval is extracted; directly outputting a driving voltage signal corresponding to the current refresh frequency to the display panel;
if the judgment result is different, step S202 is executed to access the driving voltage database, judge the frequency interval where the target refresh frequency is located, and extract the driving voltage data corresponding to the frequency interval.
In another embodiment, step S201 directly performs step S202 to access the driving voltage database, determine the frequency interval in which the target refresh frequency is located, and extract the driving voltage data corresponding to the frequency interval after determining the refresh frequency of the display panel according to the image data to be displayed, regardless of whether the target refresh frequency of the display panel is the same as the current refresh frequency of the display panel.
In one embodiment, step S202 accesses a driving voltage database, determines a frequency interval in which the target refresh frequency is located, and extracts driving voltage data corresponding to the frequency interval, where the step includes:
accessing a driving voltage database;
matching the target refreshing frequency with a sub-frequency interval in a driving voltage database to obtain a target sub-frequency interval;
and extracting driving voltage data corresponding to the target sub-frequency interval to serve as driving voltage data corresponding to the target refresh frequency.
In one embodiment, the sub-frequency bins are all the same size.
In another embodiment, there are at least two sub-frequency bins of different sizes.
In one embodiment, the driving method of a display panel provided by the present invention further includes pre-building a driving voltage database, as shown in fig. 3, where the step of pre-building the driving voltage database includes:
s301, acquiring a refresh frequency interval of a display panel;
s302, dividing a refreshing frequency interval to obtain at least two sub-frequency intervals;
s303, driving voltage data corresponding to the sub-frequency interval is obtained;
s304, matching the sub-frequency interval with the driving voltage data corresponding to the sub-frequency interval to obtain a driving voltage database.
In step S301, the refresh frequency interval obtained according to the application occasion of the display panel, such as a notebook, is 48 Hz-165 Hz, 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 notebook battery 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 48 Hz-165 Hz.
In step S302, since the difference in the refresh frequency of the display panel is larger at the same driving voltage signal, the luminance difference of the display panel is larger. 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.
According to the principle, the size of the sub-frequency interval can be set according to specific panel brightness difference requirements. For example, for the display panel in the embodiment of the present invention, it is necessary to control the brightness difference of the display panel to be β/2 or less, and then it is necessary to control the size of the sub-frequency interval not to exceed 58.5Hz.
Then, the refresh frequency interval is divided according to the size of the sub-frequency interval.
In one embodiment, the refresh frequency interval is equally divided, and the equal division of the division can be set according to the need, the more the equal division is, the more the number of sub-frequency intervals is, and the smaller the single sub-frequency interval is. As shown in fig. 4, the refresh frequency interval is equally divided into halves, the sub-frequency interval includes a first sub-frequency interval of 48Hz to 106.5Hz and a second sub-frequency interval of 106.5Hz to 165Hz, and the sub-frequency intervals are 58.5Hz. As shown in fig. 5, the refresh frequency interval is equally divided into three equal divisions, and 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 sub-frequency intervals are 39Hz in size.
In another embodiment, the refresh frequency interval is divided unevenly, i.e. there are at least two sub-frequency intervals of different sizes. As shown in fig. 5, the refresh frequency interval is unevenly divided, and the sub-frequency interval includes 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 being 58.5Hz in size, and the seventh sub-frequency interval and the eighth sub-frequency interval each being 29.25Hz in size.
It should be noted that the larger the number of sub-frequency intervals, the larger the corresponding driving voltage data amount, which is a program file stored in the driving IC (Integrated Circuit ), and the larger the driving voltage data amount, the larger the memory requirement for the driving IC. According to the invention, the refresh frequency of the display panel is divided into a plurality of sub-frequency intervals, one sub-frequency interval corresponds to one driving voltage data, so that the requirement on the driving IC memory is effectively reduced, and the production cost is reduced.
In step S303, the step of acquiring driving voltage data corresponding to the sub-frequency interval includes:
taking a display brightness of the display panel as standard brightness;
and testing to obtain the driving voltage data corresponding to the display panel when the standard brightness is displayed 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 luminance is α and the predetermined frequency is the minimum frequency. Testing driving voltage data a corresponding to the display panel when displaying standard brightness alpha at a first minimum frequency of 48Hz, and taking the driving voltage data a as driving voltage data corresponding to a first sub-frequency interval of 48 Hz-106.5 Hz; and (3) testing the driving voltage data b corresponding to the display panel when the standard brightness alpha is displayed at the second minimum frequency of 106.5Hz, and taking the driving voltage data b as the driving voltage data corresponding to the first sub-frequency interval of 48 Hz-106.5 Hz.
In another embodiment, as shown in FIG. 5, the standard luminance is α+β/2 and the predetermined frequency is an intermediate frequency. The driving voltage data c corresponding to standard brightness alpha+beta/2 is displayed on the test display panel at the third intermediate frequency of 67.5Hz, and the driving voltage data c is used as the driving voltage data corresponding to the third sub-frequency interval of 48 Hz-87 Hz; the driving voltage data d corresponding to the standard brightness alpha+beta/2 is displayed on the test display panel at the fourth intermediate frequency of 106.5Hz, and the driving voltage data d is used as the driving voltage data corresponding to the fourth sub-frequency interval of 87 Hz-126 Hz; and displaying driving voltage data e corresponding to standard brightness alpha+beta/2 by the test display panel at a fifth intermediate frequency of 145.5Hz, and taking the driving voltage data e as driving voltage data corresponding to a fifth sub-frequency interval of 126 Hz-165 Hz.
In another embodiment, as shown in fig. 6, the standard luminance is α+β, and the predetermined frequency is the maximum frequency. Testing driving voltage data f corresponding to the display panel when displaying standard brightness beta at a sixth maximum frequency of 106.5Hz, and taking the driving voltage data f as driving voltage data corresponding to a sixth sub-frequency interval of 48 Hz-106.5 Hz; testing driving voltage data g corresponding to the display panel when displaying standard brightness beta at a seventh maximum frequency 135.75Hz, and taking the driving voltage data g as driving voltage data corresponding to a seventh sub-frequency interval 106.5 Hz-135.75 Hz; and displaying driving voltage data h corresponding to standard brightness alpha+beta by the test display panel at the eighth maximum frequency 135.75Hz, and taking the driving voltage data h as driving voltage data corresponding to the eighth sub-frequency interval 135.75 Hz-165 Hz.
The driving method of the display panel provided by the invention is further described below with the brightness display result of the display panel.
In one embodiment, as shown in fig. 4, fig. 4 is a graph of luminance versus frequency of a first embodiment of a driving method of a display panel according to the present invention. The driving voltage database comprises a first sub-frequency interval 48 Hz-106.5 Hz and a second sub-frequency interval 106.5 Hz-165 Hz, the driving voltage data corresponding to the first sub-frequency interval is a, and the driving voltage data corresponding to the second sub-frequency interval is b. The driving method provided by the invention is adopted to drive the display panel, the brightness interval of the display panel in the first sub-frequency interval is alpha-alpha+beta/2, and the brightness difference is beta/2; the brightness interval of the display panel in the second sub-frequency interval is alpha-alpha+beta/2, and the brightness difference is beta/2; the display panel has similar brightness in the first and second sub-frequency regions, and the maximum brightness difference between the regions is beta/2. As can be seen from comparing fig. 1, the driving method of the display panel provided in this embodiment reduces the brightness difference of the display panel from β to β/2, thereby alleviating the problem of flicker caused by brightness variation at different frequencies.
In another embodiment, as shown in fig. 5, fig. 5 is a graph of luminance versus frequency of a second embodiment of the driving method of the display panel provided by the present invention. The driving voltage database comprises a third sub-frequency interval 48 Hz-87 Hz, a fourth sub-frequency interval 87 Hz-126 Hz and a fifth sub-frequency interval 126 Hz-165 Hz, wherein the driving voltage data corresponding to the third sub-frequency interval is c, the driving voltage data corresponding to the fourth sub-frequency interval is d, and the driving voltage data corresponding to the fifth sub-frequency interval is e. The driving method provided by the invention is adopted to drive the display panel, the brightness interval of the display panel in the third sub-frequency interval is alpha+beta/3-alpha+2beta/3, and the brightness difference is beta/3; the brightness interval of the display panel in the fourth sub-frequency interval is alpha+beta/3-alpha+2beta/3, and the brightness difference is beta/3; the brightness interval of the display panel in the fifth sub-frequency interval is alpha+beta/3-alpha+2beta/3, and the brightness difference is beta/3; the display panel has similar brightness in the third, fourth, and fifth sub-frequency regions, and the maximum brightness difference between the regions is also beta/3. As can be seen from comparing fig. 1, the driving method of the display panel provided in this embodiment reduces the brightness difference of the display panel from β to β/3, and compared with the embodiment shown in fig. 4, the driving method further reduces the brightness difference of the display panel, and further alleviates the problem of flicker caused by brightness change at different frequencies.
In yet another embodiment, as shown in fig. 6, fig. 6 is a graph of luminance versus frequency of a third embodiment of a driving method of a display panel according to the present invention. The driving voltage database comprises a sixth sub-frequency interval 48 Hz-106.5 Hz, a seventh sub-frequency interval 106.5 Hz-135.75 Hz and an eighth sub-frequency interval 135.75 Hz-165 Hz, wherein the driving voltage data corresponding to the sixth sub-frequency interval is f, the driving voltage data corresponding to the seventh sub-frequency interval is g, and the driving voltage data corresponding to the eighth sub-frequency interval is h. The driving method provided by the invention is adopted to drive the display panel, the brightness interval of the display panel in the sixth sub-frequency interval is alpha+beta/2-alpha+beta, and the brightness difference is beta/2; the brightness interval of the display panel in the seventh sub-frequency interval is alpha+3β/4-alpha+β, and the brightness difference is β/4; the brightness interval of the display panel in the eighth sub-frequency interval is alpha+3β/4-alpha+β, and the brightness difference is β/4; the display panel has similar brightness in the sixth, seventh and eighth sub-frequency intervals, and the maximum brightness difference between the intervals is beta/2. As can be seen from comparing fig. 1, the driving method of the display panel provided in this embodiment reduces the brightness difference of the display panel from β to β/2, reduces the brightness difference of the display panel, and alleviates the flicker problem caused by the brightness change at different frequencies.
Meanwhile, an embodiment of the present invention provides a driving apparatus for a display panel, for implementing the driving method of the display panel, as shown in fig. 7, the driving apparatus 70 includes:
a determining unit 710, configured to determine a target refresh frequency of the display panel according to the image data to be displayed.
The extracting unit 720 is configured to access the driving voltage database, determine a frequency interval in which 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 intervals with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency intervals with smaller frequency.
And an output unit 730 for outputting a driving voltage signal corresponding to the driving voltage data to the display panel.
The embodiment provides a driving device for a display panel, by which the driving method for the display panel is implemented, so that the brightness difference of the display panel in each sub-frequency interval is kept at a small value, and the brightness between different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the problem of picture flickering caused by overlarge brightness change.
In one embodiment, the determining unit 710 includes a determining module configured to determine 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.
The extraction module is used for extracting driving voltage data corresponding to the target sub-frequency interval and taking the driving voltage data as driving voltage data corresponding to the target refresh frequency.
In one embodiment, the drive apparatus 70 further comprises a drive voltage database building unit.
In one embodiment, a driving voltage database building unit includes:
the first acquisition module is used for acquiring a refresh 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 acquisition module includes:
the acquisition sub-module is used for acquiring a display brightness of the display panel as standard brightness;
the testing sub-module is used for testing and obtaining the driving voltage data corresponding to the display panel when the standard brightness is displayed at the preset frequency in the sub-frequency interval, and the driving voltage data is used as the driving voltage data corresponding to the sub-frequency interval.
As can be seen from 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 refresh frequency of the display panel according to the image data to be displayed; accessing a driving voltage database, judging a frequency interval in which a target refresh 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 interval with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with smaller frequency; and outputting a driving voltage signal corresponding to the driving voltage data to the display panel for display. 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 between different sub-frequency intervals is similar, thereby reducing the brightness difference of the whole display panel and relieving the problem of picture flickering caused by overlarge brightness change.
In summary, although the present invention has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is defined by the appended claims.
Claims (10)
1. A driving method of a display panel, comprising:
determining a target refresh frequency of the display panel according to the image data to be displayed;
accessing a driving voltage database, judging a frequency interval in which the target refresh 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 each sub-frequency interval, wherein the driving voltage data corresponding to the sub-frequency interval with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with smaller frequency;
and outputting a driving voltage signal corresponding to the driving voltage data to the display panel so as to display, wherein the brightness increases along with the increase of the driving voltage signal at the same frequency.
2. The driving method according to claim 1, wherein after the step of determining a refresh frequency of the display panel based on the image data to be displayed, the driving method further comprises:
judging whether the target refresh frequency is the same as the current refresh frequency of the display panel;
if the judgment result is different, the executing step accesses a driving voltage database, judges the frequency interval where the target refresh frequency is located, and extracts driving voltage data corresponding to the frequency interval.
3. The driving method as claimed in claim 1, wherein the step of accessing the driving voltage database, judging a frequency interval in which the target refresh frequency is located, and extracting driving voltage data corresponding to the frequency interval comprises:
accessing a driving voltage database;
matching the target refresh 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 to serve as driving voltage data corresponding to the target refresh frequency.
4. The driving method of claim 1, wherein the sub-frequency intervals are all the same size.
5. The driving method according to claim 1, wherein there are at least two of the sub-frequency intervals that are different in size.
6. The driving method according to claim 1, wherein the driving method further comprises building a driving voltage database in advance, the step of building the driving voltage database comprising:
acquiring a refresh 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 as claimed in claim 6, wherein the step of acquiring the driving voltage data corresponding to the sub-frequency interval comprises:
taking a display brightness of the display panel as standard brightness;
and testing to obtain the display panel, displaying the driving voltage data corresponding to 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 device of a display panel, comprising:
a determining unit for determining a target refresh frequency of the display panel according to the image data to be displayed;
the extraction unit is used for accessing the driving voltage database, judging the 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 each sub-frequency interval, wherein the driving voltage data corresponding to the sub-frequency interval with larger frequency is smaller than the driving voltage data corresponding to the sub-frequency interval with smaller frequency;
and the output unit is used for outputting a driving voltage signal corresponding to the driving voltage data to the display panel, and the brightness is increased along with the increase of the driving voltage signal at the same frequency.
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| CN112542124B (en) * | 2020-12-04 | 2022-08-05 | Tcl华星光电技术有限公司 | Brightness compensation method, brightness compensation device and display device |
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