CN112908242A - 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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- CN112908242A CN112908242A CN202110239949.7A CN202110239949A CN112908242A CN 112908242 A CN112908242 A CN 112908242A CN 202110239949 A CN202110239949 A CN 202110239949A CN 112908242 A CN112908242 A CN 112908242A
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- rate mode
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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
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The invention discloses a driving method and a driving device of a display panel and a display device. The driving method of the display panel comprises the following steps: determining a refresh rate mode of the display panel according to the refresh rate of the display panel; adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within a frame period according to a refresh rate mode; the higher the refresh rate corresponding to the refresh rate mode is, the less the number of the scanning signal pulses is, the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced through the reduction of the multiple of the scanning signal pulses of a small number, so that the smear problem and the power consumption of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a driving method and a driving device of a display panel and a display device.
Background
When the display panel displays, the display fluency of the display panel can be improved by adopting the high refresh rate, the visual enjoyment of human eyes is improved, and the power consumption of the display panel is increased at the same time. When the display panel is driven by the scan signal of the multi-scan pulse mode, the power consumption of the display panel is further increased.
Disclosure of Invention
The invention provides a driving method and a driving device of a display panel and a display device, which aim to reduce the power consumption of the display panel on the basis of ensuring the display effect of the display panel.
In a first aspect, an embodiment of the present invention provides a method for driving a display panel, including:
determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode is, the smaller the number of the scanning signal pulses is.
Optionally, adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period according to the refresh rate mode includes:
if the refresh rate corresponding to the current refresh rate mode is higher than the refresh rate corresponding to the previous refresh rate mode, reducing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period;
and if the refresh rate corresponding to the current refresh rate mode is lower than the refresh rate corresponding to the last refresh rate mode, increasing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period.
Optionally, before determining the refresh rate mode of the display panel according to the refresh rate of the display panel, the method further includes:
and presetting the number of scanning signal pulses of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
Optionally, the refresh rate modes of the display panel include a first refresh rate mode, a second refresh rate mode, and a third refresh rate mode; the refresh rate corresponding to the first refresh rate mode is smaller than the refresh rate corresponding to the second refresh rate mode, and the refresh rate corresponding to the second refresh rate mode is smaller than the refresh rate corresponding to the third refresh rate mode;
adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in a frame period according to the refresh rate mode, comprising:
if the refresh rate mode is the first refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a first preset value;
if the refresh rate mode is a second refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a second preset value; wherein the second preset value is smaller than the first preset value;
and if the refresh rate mode is a third refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a third preset value, and the third preset value is smaller than the second preset value.
Optionally, when the same refresh rate mode corresponds to at least two refresh rates, the number of the scanning signal pulses corresponding to at least two refresh rates in the same refresh rate mode is equal.
Optionally, before determining the refresh rate mode of the display panel according to the refresh rate of the display panel, the method includes:
acquiring an application scene of the display panel;
and determining the refresh rate of the display panel according to the application scene of the display panel.
Optionally, before determining the refresh rate of the display panel according to the application scenario of the display panel, the method further includes:
and presetting refresh rates of the display panel corresponding to different application scenes of the display panel.
In a second aspect, an embodiment of the present invention further provides a driving apparatus for a display panel, including:
the determining module is used for determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
the adjusting module is used for adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode is, the smaller the number of the scanning signal pulses is.
Optionally, the driving apparatus of the display panel further includes:
and the presetting module is used for presetting the scanning signal pulse number of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
In a third aspect, an embodiment of the present invention further provides a display device including the driving device of the display panel provided in any embodiment of the present invention.
According to the technical scheme of the embodiment of the invention, the number of the scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period is adjusted according to the refresh rate mode, so that the number of the scanning signal pulses in the refresh rate mode corresponding to the high refresh rate is less, the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced through the multiple of the small number of the scanning signal pulses, so that the smear and power consumption problems of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
Drawings
FIG. 1 is a timing diagram of a scan signal with a multi-scan pulse pattern according to the prior art;
fig. 2 is a schematic flowchart of a driving method of a display panel according to an embodiment of the invention;
fig. 3 is a schematic flowchart of another driving method for a display panel according to an embodiment of the invention;
fig. 4 is a schematic flowchart of another driving method for a display panel according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the prior art, when the display panel is driven, the pixel unit in the display panel can be driven to emit light by adopting the scanning signal in the multi-scanning pulse mode, so that the pixel circuit in the pixel unit is repeated for multiple times in a non-light-emitting stage, the frequency of periodic charging and discharging of the pixel circuit is increased, and the problem of smear caused by the hysteresis effect of a transistor in the pixel circuit can be solved. Fig. 1 is a timing diagram of a scanning signal with a multi-scan pulse mode provided in the prior art. The multi-scan pulse mode comprises at least one effective scan signal pulse number. As shown in fig. 1, the scan signal has a 3-scan pulse pattern. When the non-emission period of the pixel circuit includes the initialization period t1 and the data writing period t2, the period in which the scan signal controls the pixel circuit to be charged includes the initialization period t1 and the data writing period t 2. And when the scan signal is set to be active low, at the initialization stage t1, the first scan signal S1 inputs 3 scan pulses, and at this time, the first scan signal S1 can control the pixel circuit to perform three times of charging, i.e., three times of initialization, so that the number of times of initialization is increased, thereby improving the smear problem caused by the hysteresis effect of the transistors in the pixel circuit. In the data writing phase t2, the second scan signal S2 inputs 3 scan pulses, and the second scan signal S2 can also charge the pixel circuit three times, that is, three times of data writing is performed, so that the data writing times are increased, and the smear problem caused by the hysteresis effect of the transistors in the pixel circuit is further improved. When the display panel adopts a high refresh rate to drive display, the high refresh rate can improve the frequency of periodic charging and discharging of the capacitor in the pixel circuit so as to improve the smear problem caused by the hysteresis effect of the transistor in the pixel circuit. Because the smear problem caused by the hysteresis effect of the transistors in the pixel circuit can be improved by the high refresh rate, on the basis, the scanning signals in the multi-scanning pulse mode are continuously adopted to drive the pixel units in the display panel to emit light, the improvement effect of the smear problem caused by the hysteresis effect of the transistors in the pixel circuit is not obvious compared with the improvement effect under the high refresh rate, and at the moment, the power consumption of the display panel is greatly increased, so that the unnecessary power consumption under the high refresh rate is caused.
In view of the above technical problems, embodiments of the present invention provide a driving method for a display panel. Fig. 2 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention. The method may be used for driving a display panel comprising multiple refresh rates, the method may be performed by a driving apparatus of the display panel, and the driving apparatus may be integrated within a driving chip of the display panel. As shown in fig. 2, the method includes:
s110, determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
in particular, the display panel may have a plurality of refresh rates for meeting the demand for refresh rates in different application scenarios of the display panel. Illustratively, the display panel may include a high refresh rate, e.g., 120Hz, for meeting the refresh rate requirements of the application scenario, such as the game of the display panel. The display panel may comprise a regular refresh rate, for example 60Hz, for meeting the refresh rate requirements of application scenarios such as still picture display or video playback of the display panel. The display panel may further comprise a low refresh rate, for example 30Hz, for meeting the refresh rate requirements of application scenarios such as screen saver of the display panel. The refresh rate modes are refresh rate ranges divided by the display panel according to the levels of a plurality of refresh rates, and each refresh rate mode comprises the refresh rate of at least one display panel. When one refresh rate mode includes refresh rates of at least two display panels, the number of scanning signal pulses in the multi-scanning pulse mode corresponding to the at least two refresh rates included in the refresh rate mode is equal.
S120, adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode, the less the number of scanning signal pulses.
Specifically, in one frame period, the number of scanning signal pulses provided to each row of sub-pixels in the display panel may be multiple, and at this time, the display panel may adopt a scanning signal of a multi-scanning pulse mode when driving, so that multiple repetitions of the pixel circuit in the display panel at the non-light-emitting stage may be achieved, the charging and discharging frequency of the pixel circuit may be increased, and the smear problem of the display panel may be improved. After the refresh rate mode is determined, the number of scanning signal pulses in the multi-scanning pulse mode of the display panel can be adaptively adjusted according to the refresh rate corresponding to the refresh rate mode. When the refresh rate corresponding to the refresh rate mode is higher, the number of the set scanning signal pulses can be reduced, the charging and discharging frequency of the pixel circuit can be improved due to the high refresh rate at the moment, so that the smear problem of the display panel can be improved, and meanwhile, the power consumption of the display panel can be reduced by multiple times due to the less number of the scanning signal pulses, so that the power consumption of the display panel can be reduced while the display effect of the display panel is ensured. When the refresh rate corresponding to the refresh rate mode is relatively low, the number of the set scanning signal pulses can be increased, the high power consumption of the display panel can be avoided due to the low refresh rate, and meanwhile, the charging and discharging frequency of the pixel circuit can be improved due to the relatively large number of the scanning signal pulses, so that the smear problem of the display panel is improved. Therefore, the power consumption of the display panel can be reduced while the display effect of the display panel is ensured.
According to the technical scheme of the embodiment of the invention, the number of the scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period is adjusted according to the refresh rate mode, so that the number of the scanning signal pulses in the refresh rate mode corresponding to the high refresh rate is less, the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced through the multiple of the small number of the scanning signal pulses, so that the smear problem and the power consumption of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
On the basis of the above technical solution, adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period according to the refresh rate mode includes:
if the refresh rate corresponding to the current refresh rate mode is higher than the refresh rate corresponding to the previous refresh rate mode, reducing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period;
specifically, each refresh rate mode includes at least one refresh rate. When each refresh rate mode includes a refresh rate, the refresh rate differs between different refresh rate modes. In the display process of the display panel, if the refresh rate corresponding to the refresh rate mode of the current frame is higher than the refresh rate corresponding to the refresh rate mode of the previous frame, the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period can be reduced, so that the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, meanwhile, the power consumption of the display panel can be reduced through the scanning signal pulses with less number, and the power consumption of the display panel can be reduced while the display effect of the display panel is ensured. Illustratively, the multi-scan pulse mode of the display panel may be 3 scan pulses, and the display panel is provided with three refresh rate modes corresponding to refresh rates of 30Hz, 60Hz, and 120Hz, respectively. When the refresh rate corresponding to the current refresh rate mode of the display panel is 120Hz, the refresh rate corresponding to the previous refresh rate mode is 60Hz, and the number of the scanning signal pulses in the previous refresh rate mode is 2, the number of the scanning signal pulses of the display panel can be reduced from 2 to 1, the problem of smear of the display panel is improved at a high refresh rate of 120Hz, and the power consumption of the display panel is reduced by reducing the number of the scanning signal pulses.
If the refresh rate corresponding to the current refresh rate mode is lower than the refresh rate corresponding to the previous refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period is increased.
Specifically, if the refresh rate corresponding to the refresh rate mode of the current frame is lower than the refresh rate corresponding to the refresh rate mode of the previous frame, the number of the scanning signal pulses provided to each row of the subpixels in the display panel in one frame period may be increased, so as to increase the charging and discharging frequency of the pixel circuit through a larger number of the scanning signal pulses, thereby improving the smear problem of the display panel, and meanwhile, the lower refresh rate may reduce the power consumption of the display panel, thereby reducing the power consumption of the display panel while ensuring the display effect of the display panel. Illustratively, the multi-scan pulse mode of the display panel may be 3 scan pulses, and the display panel is provided with three refresh rate modes corresponding to refresh rates of 30Hz, 60Hz, and 120Hz, respectively. When the refresh rate corresponding to the current refresh rate mode of the display panel is 30Hz, the refresh rate corresponding to the previous refresh rate mode is 60Hz, and the number of the scanning signal pulses in the previous refresh rate mode is 2, the number of the scanning signal pulses of the display panel can be increased from 2 to 3, the smear problem of the display panel is improved by using 3 scanning signal pulses, and meanwhile, the power consumption of the display panel is reduced by the low refresh rate.
Fig. 3 is a flowchart illustrating another driving method of a display panel according to an embodiment of the invention. As shown in fig. 3, the method includes:
s210, presetting the number of scanning signal pulses of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
Specifically, the display panel comprises a plurality of rows of sub-pixels, and the pixel circuits in the sub-pixels in the same row input the same scanning signal at the same stage, so that the sub-pixels in the same row emit light under the driving of the same scanning signal. When the display panel comprises a plurality of refresh rates, different refresh rate modes can be divided according to the refresh rates, and then the number of scanning signal pulses of each row of sub-pixels corresponding to the different refresh rate modes is set to determine the number of scanning signal pulses of each scanning signal. Illustratively, when the display panel is divided into three refresh rate modes according to the refresh rate, and the multi-scan pulse mode of the display panel is 3 scan pulses, the number of scan signal pulses of each row of sub-pixels corresponding to one refresh rate mode may be respectively set according to the magnitude of the refresh rate in the refresh rate mode. For example, the number of scanning signal pulses in the refresh rate mode corresponding to the highest refresh rate may be set to 1, the number of scanning signal pulses in the refresh rate mode corresponding to the lowest refresh rate may be set to 3, and the number of scanning signal pulses in the refresh rate mode corresponding to the intermediate refresh rate may be set to 2.
It should be noted that the above process merely illustrates the display panel being divided into 3 refresh rate modes, and the multi-scan pulse mode is 3 scan pulses. In other embodiments, the display panel may include other number of refresh rate modes, and the number of scan pulses of the multi-scan pulse mode may be any number. And the number of the refresh rate modes and the number of the scan pulses of the multi-scan pulse mode can be independently set. Moreover, each refresh rate mode may correspond to a plurality of refresh rates, and the number of scan signal pulses corresponding to different refresh rate modes may be discontinuous.
S220, determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
s230, adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode, the less the number of scanning signal pulses.
Specifically, different refresh rate modes correspond to different numbers of scanning signal pulses, and after the refresh rate modes are determined, the number of the scanning signal pulses can be adjusted to be the number of the scanning signal pulses corresponding to the current refresh rate mode according to the corresponding relation between the refresh rate modes and the number of the scanning signal pulses, so that the smear problem and the power consumption of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
Illustratively, the refresh rate modes of the display panel include a first refresh rate mode, a second refresh rate mode, and a third refresh rate mode; the refresh rate corresponding to the first refresh rate mode is smaller than the refresh rate corresponding to the second refresh rate mode, and the refresh rate corresponding to the second refresh rate mode is smaller than the refresh rate corresponding to the third refresh rate mode;
adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in a frame period according to a refresh rate pattern, comprising:
if the refresh rate mode is the first refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a first preset value;
specifically, when the display panel includes three refresh rate modes, the multi-scan pulse mode of the display panel may be a multi-scan pulse mode of 3 or more scan pulses, i.e., the number of scan signal pulses supplied to each row of sub-pixels in the display panel may be adjusted from 1 to 3 or more. The refresh rate corresponding to the first refresh rate mode is the minimum refresh rate, and the first preset value can be set as the maximum number of scanning signal pulses in the multi-scanning pulse mode, so that the smear problem and the power consumption of the display panel are comprehensively considered by the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured. Illustratively, when the multi-scan pulse pattern of the display panel is 3 scan pulses, that is, the number of scan signal pulses supplied to each row of sub-pixels in the display panel can be adjusted from 1 to 3, the first preset value may be 3, corresponding to the largest number of scan signal pulses in the 3 scan pulses.
If the refresh rate mode is the second refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a second preset value; wherein the second preset value is smaller than the first preset value;
specifically, the refresh rate corresponding to the second refresh rate mode is an intermediate refresh rate among the plurality of refresh rates, and is greater than the refresh rate corresponding to the first refresh rate mode, so that the refresh rate corresponding to the second refresh rate mode can increase the charging and discharging frequency of the pixel circuit, and improve the smear problem of the display panel. At this time, the second preset value can be set to be smaller than the first preset value, the power consumption of the display panel is reduced by comparing a small number of scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured. For example, when the multi-scan pulse pattern of the display panel is 3 scan pulses, the second preset value may be 2, corresponding to the middle scan signal pulse among the 3 scan pulses.
And if the refresh rate mode is the third refresh rate mode, the number of the scanning signal pulses provided to each row of the sub-pixels in the display panel is a third preset value, and the third preset value is smaller than the second preset value.
Specifically, the refresh rate corresponding to the third refresh rate mode is the maximum refresh rate of the plurality of refresh rates, and is greater than the refresh rate corresponding to the second refresh rate mode, so that the refresh rate corresponding to the third refresh rate mode can further increase the charging and discharging frequency of the pixel circuit on the basis of the refresh rate corresponding to the second refresh rate mode, and improve the smear problem of the display panel. At this time, the third preset value can be set to be smaller than the second preset value, and the power consumption of the display panel is further reduced by comparing a small number of scanning signal pulses, so that the display effect of the display panel is ensured and the power consumption of the display panel is reduced at the same time. For example, when the multi-scan pulse mode of the display panel is 3 scan pulses, the third preset value may be 1, corresponding to the least number of scan signal pulses in the 3 scan pulses.
It should be noted that, when the multi-scan pulse mode is greater than 3 scan pulses, that is, the number of scan signal pulses provided to each row of sub-pixels in the display panel can be adjusted from 1 to greater than 3, the number of scan signal pulses corresponding to different refresh rate modes may not be continuous. For example, when the multi-scan pulse mode is 5 scan pulses, the first preset value may be 5, the second preset value may be 3, and the third preset value may be 1.
On the basis of the technical schemes, when the same refresh rate mode corresponds to at least two refresh rates, the number of scanning signal pulses corresponding to the at least two refresh rates in the same refresh rate mode is equal.
Specifically, when the number of refresh rates of the display panel is greater than the number of refresh rate modes of the display panel, at least one refresh rate mode may correspond to at least two refresh rates. Illustratively, when the display panel includes three refresh rate modes and the display panel includes more than 3 refresh rates, one refresh rate mode may be set to correspond to a plurality of refresh rates. Illustratively, the display panel includes refresh rates of 30Hz, 60Hz, 90Hz, and 120Hz, and the first refresh rate mode may be set to correspond to 30Hz, the second refresh rate mode to correspond to 60Hz and 90Hz, and the third refresh rate mode to correspond to 120 Hz. At this time, the number of scanning signal pulses corresponding to 60Hz and 90Hz of the second refresh rate mode is equal, for example, the number of scanning signal pulses corresponding to 60Hz and 90Hz may be 2. At the moment, the requirements of different application scenes of the display panel on the refresh rate can be improved on the basis of reducing the power consumption of the display panel, the frequent change of the number of scanning signal pulses can be avoided when different refresh rates are frequently switched, and the requirement of the display panel on the driving capability is reduced. In addition, the number of scanning signal pulses corresponding to the plurality of refresh rates in the second refresh rate mode is less than the number of scanning signal pulses corresponding to the refresh rate in the first refresh rate mode, and the number of scanning signal pulses corresponding to the plurality of refresh rates in the second refresh rate mode is greater than the number of scanning signal pulses corresponding to the refresh rate in the third refresh rate mode. Illustratively, the number of scanning signal pulses corresponding to 60Hz and 90Hz in the second refresh rate mode is less than the number of scanning signal pulses corresponding to 30Hz in the first refresh rate mode, and the number of scanning signal pulses corresponding to 60Hz and 90Hz in the second refresh rate mode is greater than the number of scanning signal pulses corresponding to 120Hz in the third refresh rate mode.
Fig. 4 is a flowchart illustrating another driving method of a display panel according to an embodiment of the invention. As shown in fig. 4, the method includes:
s310, acquiring an application scene of a display panel;
in particular, the application scenarios of the display panel are many, for example, the display panel can be in a screen saver mode, or browse a web page or enter a game interface. Different application scenarios have different requirements on the refresh rate of the display panel. For example, the refresh rate requirement of the display panel in the screen-saving mode is relatively low, and may be 30 Hz. The refresh rate of the display panel is required to be relatively conventional by conventional operations such as browsing a webpage and the like, and can be 60Hz or 90 Hz. The refresh rate of the display panel is required to be high when the game interface is accessed, and the refresh rate can be 120 Hz. In the process of displaying the display panel, different refresh rates supported by the display panel can be called according to application scenes, so that the refresh rates of the display panel can meet the display requirements in different application scenes.
And S320, determining the refresh rate of the display panel according to the application scene of the display panel.
Specifically, after the application scene of the display panel is determined, the refresh rate of the display panel can be determined according to the refresh rate requirement of the application scene of the display panel on the display panel, so that the refresh rate meets the requirement of the application scene, and the experience effect of a user is improved. Illustratively, when the application scene of the display panel is a game, the requirement on the refresh rate of the display panel is relatively high, the display panel is set to call a relatively high refresh rate, for example, 120Hz, and the refresh rate corresponding to the current application scene of the display panel is determined to be a high refresh rate. When the application scene of the display panel is normal operation such as browsing a webpage, the refresh rate of the display panel is required to be relatively normal, the display panel is set to call the relatively normal refresh rate, for example, 60Hz or 90Hz, and the refresh rate corresponding to the current application scene of the display panel is determined to be the normal refresh rate. When the application scene of the display panel is in the screen saver mode, the requirement on the refresh rate of the display panel is low, the display panel is set to call the refresh rate which is low, for example, 30Hz, and the refresh rate corresponding to the current application scene of the display panel is determined to be the low refresh rate.
S330, determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
s340, adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode, the less the number of scanning signal pulses.
On the basis of the above technical solution, before determining the refresh rate of the display panel according to the application scenario of the display panel, the method further includes:
and presetting refresh rates of the display panel corresponding to different application scenes of the display panel.
Specifically, after determining the application scene of the display panel, the refresh rate requirements of the display panel are classified according to the application scene of the display panel. Illustratively, when the application scene of the display panel is a screen saver, etc., the refresh rate requirement on the display panel is relatively low, for example, 30 Hz. At this time, the application scenes with relatively low requirements on the refresh rate can be divided into a class of application scenes, and the class of application scenes corresponds to the low refresh rate of the display panel. When the application scene of the display panel is still picture display or video playing, etc., the refresh rate requirement of the display panel is relatively conventional, for example, 60Hz or 90 Hz. At this time, the application scenes requiring a relatively regular refresh rate can be divided into a class of application scenes, and the application scenes correspond to the regular refresh rate of the display panel. When the application scene of the display panel is a game interface, the requirement on the refresh rate of the display panel is relatively high, for example, 120 Hz. At this time, the application scenes with relatively high requirements on the refresh rate can be divided into a class of application scenes, and the application scenes correspond to the high refresh rate of the display panel. After the relationship between the application scene and the refresh rate is determined, in the subsequent process, the refresh rate of the display panel can be directly determined according to the application scene of the display panel, then the refresh rate mode is determined according to the refresh rate, the number of scanning signal pulses of the display panel is adjusted according to the refresh rate mode, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
The embodiment of the invention also provides a driving device of the display panel. Fig. 5 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 5, the driving apparatus of the display panel includes:
a determining module 10, configured to determine a refresh rate mode of the display panel according to a refresh rate of the display panel;
an adjusting module 20, configured to adjust the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode, the less the number of scanning signal pulses.
According to the technical scheme of the embodiment of the invention, the number of the scanning signal pulses provided to each row of sub-pixels in the display panel is adjusted by the adjusting module in one frame period according to the refresh rate mode, so that the number of the scanning signal pulses in the refresh rate mode corresponding to the high refresh rate is less, the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced through the multiple of the small number of the scanning signal pulses, so that the smear problem and the power consumption of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
On the basis of the above technical solution, when the adjusting module adjusts the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode, the adjusting module includes:
if the refresh rate corresponding to the current refresh rate mode is higher than the refresh rate corresponding to the previous refresh rate mode, reducing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period;
if the refresh rate corresponding to the current refresh rate mode is lower than the refresh rate corresponding to the previous refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period is increased.
In addition to the above technical solutions, the driving device of the display panel further includes:
and the presetting module is used for presetting the number of scanning signal pulses of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
Optionally, the refresh rate modes of the display panel include a first refresh rate mode, a second refresh rate mode, and a third refresh rate mode; the refresh rate corresponding to the first refresh rate mode is smaller than the refresh rate corresponding to the second refresh rate mode, and the refresh rate corresponding to the second refresh rate mode is smaller than the refresh rate corresponding to the third refresh rate mode;
the adjustment module is configured to:
if the refresh rate mode is the first refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a first preset value;
if the refresh rate mode is the second refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a second preset value; wherein the second preset value is smaller than the first preset value;
if the refresh rate mode is the third refresh rate mode, the number of the scanning signal pulses provided to each row of the sub-pixels in the display panel is a third preset value, and the third preset value is smaller than the second preset value.
When the same refresh rate mode corresponds to at least two refresh rates, the number of scanning signal pulses corresponding to the at least two refresh rates in the same refresh rate mode is equal.
In addition to the above technical solutions, the driving device of the display panel further includes:
the acquisition module is used for acquiring an application scene of the display panel;
and the refresh rate determining module is used for determining the refresh rate of the display panel according to the application scene of the display panel.
In addition to the above technical solutions, the driving device of the display panel further includes:
and the application scene setting module is used for presetting the refresh rate of the display panel corresponding to different application scenes of the display panel.
The embodiment of the invention also provides a display device. Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 6, the display device 100 includes a driving device 101 of a display panel provided in any embodiment of the present invention.
Specifically, the display apparatus 100 includes a display panel and an application processor 102 for determining an application scene of the display panel and providing refresh rate information to the display panel, by the application processor 102. The display panel includes a non-display area NAA and a display area AA. The non-display area NAA is provided with a driving device 101 of the display panel, and the display area AA is provided with a plurality of sub-pixels P. The plurality of sub-pixels P are arranged in an array. The driving apparatus 101 of the display panel comprises a determining module 10 and an adjusting module 20, wherein the determining module 10 is connected to the application processor 102, and is configured to receive a driving signal provided by the application processor 102 to the display panel, and determine a refresh rate mode of the display panel according to refresh rate information in the driving signal of the display panel. Illustratively, the determination module 10 may include an interface to the application processor 102. The determining module 10 is connected to the adjusting module 20, and after the determining module 10 determines the refresh rate mode, the adjusting module 20 adjusts the number of pulses of the scanning signal provided to the sub-pixels in each row of the display panel in one frame period according to the refresh rate mode, so that the sub-pixels P emit light according to the scanning signal. For example, the adjusting module 20 may include a timing controller within a driving chip, a gate driving module, and a gate driving circuit of the non-display area NAA of the display panel. The time sequence controller is connected with the interface and used for configuring corresponding time sequence control signals according to the refresh rate mode, and the grid driving module is connected with the time sequence controller and used for carrying out signal conversion on the time sequence control signals so that the converted time sequence control signals can be output to the grid driving circuit of the display panel non-display area NAA. And the grid driving circuit is connected with the grid driving module and used for working according to the converted time sequence control signal and outputting the scanning signal pulse quantity with the corresponding quantity to each row of sub-pixels so as to drive each row of sub-pixels P to emit light.
Illustratively, the display panel includes three refresh rate modes, a refresh rate corresponding to the first refresh rate mode is 30Hz, a refresh rate corresponding to the second refresh rate mode is 60Hz, a refresh rate corresponding to the third refresh rate mode is 90Hz, and the display panel is driven by adopting a 3-scan pulse mode. When the refresh rate information in the display panel driving signal provided by the application processor 102 is 120Hz, the interface may determine that the current refresh rate mode is the third refresh rate mode when receiving the display panel driving signal of the application processor 102, the timing controller configures a corresponding timing control signal according to the third refresh rate mode, the timing control signal is output to the gate driving module for signal conversion and then output to the gate driving circuit, so that the gate driving circuit provides 1 scanning signal pulse number to each row of subpixels P in the display panel within one frame period, and drives the subpixels P to emit light. When the refresh rate information in the display panel driving signal provided by the application processor 102 is 60Hz, the interface may determine that the current refresh rate mode is the second refresh rate mode when receiving the display panel driving signal of the application processor 102, the timing controller configures a corresponding timing control signal according to the second refresh rate mode, the timing control signal is output to the gate driving module for signal conversion and then output to the gate driving circuit, so that the gate driving circuit provides 2 scanning signal pulses to each row of subpixels P in the display panel within one frame period, and drives the subpixels P to emit light. When the refresh rate information in the display panel driving signal provided by the application processor 102 is 30Hz, the interface may determine that the current refresh rate mode is the first refresh rate mode when receiving the display panel driving signal of the application processor 102, the timing controller configures a corresponding timing control signal according to the first refresh rate mode, the timing control signal is output to the gate driving module for signal conversion and then output to the gate driving circuit, so that the gate driving circuit provides 3 scanning signal pulses to each row of subpixels P in the display panel within one frame period, and drives the subpixels P to emit light. Therefore, the number of scanning signal pulses under the refresh rate mode corresponding to the high refresh rate is small, the charging and discharging frequency of the pixel circuit is improved through the high refresh rate, the smear problem of the display panel is improved, and meanwhile, the power consumption of the display panel is reduced through the reduction of the multiple of the scanning signal pulses of the small number, so that the smear problem and the power consumption of the display panel can be comprehensively considered through the refresh rate and the number of the scanning signal pulses, and the power consumption of the display panel is reduced while the display effect of the display panel is ensured.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method of driving a display panel, comprising:
determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode is, the smaller the number of the scanning signal pulses is.
2. The method according to claim 1, wherein adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period according to the refresh rate pattern comprises:
if the refresh rate corresponding to the current refresh rate mode is higher than the refresh rate corresponding to the previous refresh rate mode, reducing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period;
and if the refresh rate corresponding to the current refresh rate mode is lower than the refresh rate corresponding to the last refresh rate mode, increasing the number of scanning signal pulses provided to each row of sub-pixels in the display panel in one frame period.
3. The method according to claim 1, further comprising, before determining the refresh rate mode of the display panel according to the refresh rate of the display panel:
and presetting the number of scanning signal pulses of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
4. The driving method of the display panel according to claim 3, wherein the refresh rate modes of the display panel include a first refresh rate mode, a second refresh rate mode, and a third refresh rate mode; the refresh rate corresponding to the first refresh rate mode is smaller than the refresh rate corresponding to the second refresh rate mode, and the refresh rate corresponding to the second refresh rate mode is smaller than the refresh rate corresponding to the third refresh rate mode;
adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel in a frame period according to the refresh rate mode, comprising:
if the refresh rate mode is the first refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a first preset value;
if the refresh rate mode is a second refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a second preset value; wherein the second preset value is smaller than the first preset value;
and if the refresh rate mode is a third refresh rate mode, the number of scanning signal pulses provided to each row of sub-pixels in the display panel is a third preset value, and the third preset value is smaller than the second preset value.
5. The method according to claim 3, wherein when the same refresh rate mode corresponds to at least two refresh rates, the number of the scanning signal pulses corresponding to the at least two refresh rates in the same refresh rate mode is equal.
6. The method according to claim 1, before determining the refresh rate mode of the display panel according to the refresh rate of the display panel, comprising:
acquiring an application scene of the display panel;
and determining the refresh rate of the display panel according to the application scene of the display panel.
7. The method for driving a display panel according to claim 6, further comprising, before determining the refresh rate of the display panel according to an application scenario of the display panel:
and presetting refresh rates of the display panel corresponding to different application scenes of the display panel.
8. A driving apparatus of a display panel, comprising:
the determining module is used for determining a refresh rate mode of the display panel according to the refresh rate of the display panel;
the adjusting module is used for adjusting the number of scanning signal pulses provided to each row of sub-pixels in the display panel within one frame period according to the refresh rate mode; wherein, the higher the refresh rate corresponding to the refresh rate mode is, the smaller the number of the scanning signal pulses is.
9. The driving device of a display panel according to claim 8, further comprising:
and the presetting module is used for presetting the scanning signal pulse number of each row of sub-pixels in the display panel corresponding to each refresh rate mode.
10. A display device characterized by comprising a driving device of the display panel according to any one of claims 8 to 9.
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