CN107564456B - Display panel, driving method thereof and display device - Google Patents
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Abstract
The invention discloses a display panel, a driving method thereof and a display device. The driving method of the display panel includes: acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed; judging whether the display content of the picture to be displayed is the same as that of the previous frame or the next frame; if so, lightening each pixel in the picture to be displayed according to a first driving period so as to finish the display of the picture to be displayed; and if not, lightening each pixel in the picture to be displayed according to a second driving period so as to finish the display of the picture to be displayed. According to the technical scheme provided by the embodiment of the invention, the driving transistors in the pixel driving circuits of the display panel have the same initial potential, when the pixels in the display panel are lightened, the change directions of the grid-source voltages of the driving transistors are the same, and the currents of the driving transistors corresponding to the pixels with the same gray scale are consistent, so that the beneficial effect of eliminating the afterimage phenomenon is achieved.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
With the continuous development of display technology, display devices are increasingly being used in various fields of social life.
In the prior art, a core component of a display device is a display panel, the display panel includes a plurality of pixels, each pixel corresponds to a pixel driving circuit, and under the action of the pixel driving circuit, the corresponding pixel can realize normal display. The pixel driving circuit structure in the display panel varies depending on the kind and function of the display panel, but a driving transistor as a basic component is indispensable for any pixel driving circuit. In the same display panel, for two driving transistors which belong to different pixel driving circuits and have the same structure and material, when the gate-source voltages of the two driving transistors are respectively changed from a higher value to a lower value and from the lower value to the higher value, the currents flowing through the corresponding driving transistors are different, and the image sticking phenomenon is caused.
Disclosure of Invention
The invention provides a display panel, a driving method thereof and a display device, which are used for eliminating the afterimage phenomenon when the display panel displays the same picture for a long time.
In a first aspect, an embodiment of the present invention provides a driving method for a display panel, where the driving method includes:
acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed;
judging whether the display content of the picture to be displayed is the same as that of the previous frame or the next frame;
if so, lightening each pixel in the picture to be displayed according to a first driving period so as to finish the display of the picture to be displayed;
if not, lightening each pixel in the picture to be displayed according to a second driving period so as to finish the display of the picture to be displayed;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel.
In a second aspect, an embodiment of the present invention further provides a display panel, where the display panel includes:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed;
the judging module is used for judging whether the display content of the picture to be displayed is the same as that of the previous frame of picture or the next frame of picture;
the first display module is used for lighting each pixel in the picture to be displayed according to a first driving period to finish the display of the picture to be displayed when the picture to be displayed is determined to be the same as the display content of the previous frame or the next frame;
the second display module is used for lighting each pixel in the picture to be displayed according to a second driving period when the picture to be displayed is determined to be different from the display content of the previous frame or the next frame so as to finish the display of the picture to be displayed;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel.
In a third aspect, an embodiment of the present invention further provides a display device, including the display panel according to the second aspect.
According to the technical scheme provided by the embodiment of the invention, whether the display content of the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed is the same is judged by obtaining the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed, if so, each pixel in the picture to be displayed is lightened according to a first driving period to finish the display of the picture to be displayed, and if not, each pixel in the picture to be displayed is lightened according to a second driving period to finish the display of the picture to be displayed, so that driving transistors in pixel driving circuits of a display panel have the same initial potential.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a process of determining whether the display contents of the to-be-displayed frame and the previous frame or the next frame are the same;
FIG. 5 is a schematic structural diagram of a to-be-displayed image according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a structure of a frame next to the frame to be displayed in FIG. 5;
fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display panel and the manufacturing method thereof according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a driving method of a display panel, which comprises the following steps:
acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed;
judging whether the display content of the picture to be displayed is the same as that of the previous frame or the next frame;
if so, lightening each pixel in the picture to be displayed according to a first driving period so as to finish the display of the picture to be displayed;
if not, lightening each pixel in the picture to be displayed according to a second driving period so as to finish the display of the picture to be displayed;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel.
According to the technical scheme provided by the embodiment of the invention, whether the display content of the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed is the same is judged by obtaining the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed, if so, each pixel in the picture to be displayed is lightened according to a first driving period to finish the display of the picture to be displayed, and if not, each pixel in the picture to be displayed is lightened according to a second driving period to finish the display of the picture to be displayed, so that driving transistors in pixel driving circuits of a display panel have the same initial potential.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other embodiments that depart from the specific details disclosed herein, and it will be recognized by those skilled in the art that the present invention may be practiced without these specific details.
Next, the present invention is described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, the schematic drawings showing the structure of the device are not partially enlarged in general scale for convenience of description, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and height should be included in the actual fabrication.
Fig. 1 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention. As shown in fig. 1, the driving method of the display panel may specifically include the following steps:
It can be understood that the display panel displays one frame of picture after another, where the picture to be displayed is the picture to be displayed by the display panel at the current moment. The obtaining of the previous frame or the next frame of the to-be-displayed frame is any adjacent frame of the to-be-displayed frame.
And 102, judging whether the display content of the picture to be displayed is the same as that of the previous frame or the next frame, if so, executing a step 103, and if not, executing a step 104.
It should be noted that, the technical solution provided in this embodiment aims to eliminate the afterimage phenomenon occurring when the display panel displays the same picture for a long time, so that it is first required to determine whether the display panel displays the same picture for a long time, and the display content of the picture to be displayed and the previous or next frame of picture is the same, which can be used as a basis for judging that the display panel displays the same picture for a long time.
103, lighting each pixel in the to-be-displayed picture according to a first driving cycle to complete the display of the to-be-displayed picture, wherein each pixel corresponds to a pixel driving circuit, and the first driving cycle includes: a first reset phase for writing a first reset signal into the pixel driving circuit, an initialization phase for writing a first initial potential or a second initial potential into the pixel driving circuit, a second reset phase for writing a second reset signal into the pixel driving circuit, a data input phase for writing voltage data into the pixel driving circuit, and a light emitting phase for lighting the pixel.
It should be noted that, step 103 is executed when it is determined that the display content of the to-be-displayed frame is the same as the display content of the previous frame or the next frame, and it can be known from the foregoing analysis that the display panel is prone to have the image sticking phenomenon. It is understood that the conventional pixel lighting in the prior art includes three stages of writing a reset signal into the pixel driving circuit, inputting data into the pixel driving circuit, and emitting light, and in this embodiment, in order to eliminate the image sticking phenomenon, two stages, i.e., a first reset stage and an initialization stage, are added on the basis of the above-mentioned three pixel lighting stages in the prior art. The first initial potential and the second initial potential in the initial valence phase may be a high potential and a low potential, respectively, or the first initial potential and the second initial potential may be a low potential and a high potential, respectively. The initial potentials input into the pixel driving circuits in the initialization stage are both the first initial potential or the second initial potential, the setting can enable the same driving transistors in the pixel driving circuits to have the same initial potentials, and then when the gate-source voltage of the driving transistors is adjusted to a specified value in the subsequent stage, the voltage of each driving transistor can be increased to the specified value from the initial low potential or can be reduced to the specified value from the initial high potential, so that the ghost phenomenon caused by different voltage change directions of different driving transistors is eliminated. It should be noted that the first reset phase is provided before the initialization phase in order to enable the first initial potential or the second initial potential to be applied to each driving transistor in the initialization phase.
104, lighting each pixel in the picture to be displayed according to a second driving cycle to complete the display of the picture to be displayed, wherein the second driving cycle includes: a second reset phase for writing a second reset signal into the pixel driving circuit, a data input phase for writing voltage data into the pixel driving circuit, and a light emitting phase for lighting the pixel.
It should be noted that, the step 104 is executed when it is determined that the display content of the to-be-displayed frame is different from the display content of the previous frame or the next frame, and it can be known from the foregoing analysis that the display panel is not prone to have the image sticking phenomenon. The pixels can be lit in a conventional manner as in the prior art.
According to the technical scheme provided by the embodiment, whether the display content of the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed is the same or not is judged by obtaining the picture to be displayed and the previous frame picture or the next frame picture of the picture to be displayed, if so, each pixel in the picture to be displayed is lightened according to the first driving period to complete the display of the picture to be displayed, and if not, each pixel in the picture to be displayed is lightened according to the second driving period to complete the display of the picture to be displayed, so that the driving transistors in the pixel driving circuits of the display panel have the same initial potential.
Fig. 2 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention. As shown in fig. 2, the driving method of the display panel may specifically include the following steps:
It should be noted that the first driving period includes three stages and two other stages in the second driving period, and therefore, the time for lighting each pixel in the to-be-displayed picture according to the first driving period is longer than the time for lighting each pixel in the to-be-displayed picture according to the second driving period. Considering that when the to-be-displayed picture is lighted according to the first driving period, the to-be-displayed picture is the same as the display content of the previous frame or the next frame, and the display frequency of the to-be-displayed picture is reduced without changing the display content of the display panel, therefore, when each pixel in a plurality of continuous pictures with the same content is lighted according to the first driving period, the display frequency of the display panel is adjusted to the first display frequency before each pixel in the to-be-displayed picture is lighted according to the first driving period, and the display frequency of the display panel is adjusted to the second display frequency before each pixel in the to-be-displayed picture is lighted according to the second driving period, wherein the first display frequency is smaller than the second display frequency. In addition, compared with the situation that the display frequency of the display panel is always the second display frequency, the beneficial effect of reducing the power consumption of the display panel can be achieved by adjusting the display frequency of the display panel to the first display frequency before each pixel in the display picture is lightened according to the first driving period.
For example, the first display frequency may be 50Hz, and the second display frequency may be 60 Hz.
It should be noted that 60Hz is a display frequency commonly used by a display panel in the prior art, and setting the second display frequency to 60Hz makes the display frequency when each pixel in the to-be-displayed picture is lit up according to the second driving period the same as the display frequency commonly used in the prior art, thereby improving the compatibility between the technical solution of the embodiment and the prior art. On the other hand, in the case that the second display frequency is determined to be 60Hz, setting the first display frequency to 50Hz can better avoid the increase of the time for the display panel to display the same picture content, so the first display frequency is preferably selected to be 50Hz in the embodiment.
Fig. 3 is a flowchart illustrating a driving method of a display panel according to another embodiment of the present invention. As shown in fig. 3, the driving method of the display panel may specifically include the following steps:
Here, M is related to the display panel. In the 8-bit display panel, M is 255, and in the 10-bit display panel, M is 1023, where M is the maximum gray scale value of the display panel. It is understood that, for example, in a 10-bit display panel, the first set of voltage parameters includes 1024 first operating voltages, each of which corresponds to one of the gray-scale values 0-1023, and when a pixel operates at one of the first operating voltages, the gray-scale value of the pixel is the gray-scale value corresponding to the first operating voltage.
And 305, determining voltage data corresponding to each pixel in the picture to be displayed according to the first set of voltage parameters and the gray scale of each pixel in the picture to be displayed.
It should be noted that, according to the foregoing analysis, each gray scale value of a pixel corresponds to a fixed first working voltage in the first set of voltage parameters, and the first working voltage corresponding to the pixel can be determined according to the correspondence and the gray scale of the pixel, where the first working voltage is the voltage data corresponding to the pixel.
Taking a 10-bit display panel as an example, it can be understood that, similar to the first set of voltage parameters, the second set of voltage parameters includes 1024 second operating voltages, each of the second operating voltages respectively corresponds to one of the gray-scale values 0-1023, and when a pixel operates at one of the second operating voltages, the gray-scale value of the pixel is the gray-scale value corresponding to the second operating voltage.
It should be noted that, the brightness sensed by the human eye is the accumulated brightness in a period of time, so that when the first display frequency is lower than the second display frequency, in order to keep the brightness sensed by the human eye when the human eye views the display screen of the display panel unchanged, when the display frequency of the display panel is set to be the first display frequency, the brightness of the pixels with the same gray scale is larger, and when the display frequency of the display panel is the second display frequency, the brightness of the pixels with the same gray scale is smaller.
It should be noted that, according to the foregoing analysis, each gray scale value of a pixel corresponds to a fixed second working voltage in the second set of voltage parameters, and the second working voltage corresponding to the pixel can be determined according to the correspondence and the gray scale of the pixel, where the second working voltage is the voltage data corresponding to the pixel.
Optionally, fig. 4 is a schematic flowchart of determining whether the display contents of the to-be-displayed picture and the previous frame or the next frame are the same. As shown in fig. 4, the specifically determining whether the display contents of the to-be-displayed picture and the previous frame picture or the next frame picture are the same may include:
Exemplarily, fig. 5 is a schematic structural diagram of a to-be-displayed picture according to an embodiment of the present invention. As shown in fig. 5, the to-be-displayed frame includes 25 pixels 500 arranged in a matrix, 13 of the pixels 500 are extracted as the first to-be-compared pixel 500/1, and at this time, the ratio of the number of the first to-be-compared pixels 500/1 to the total number of the pixels 500 of the to-be-displayed frame is 13/25, that is, the first ratio is 13/25.
Optionally, the value range of the first ratio may be 10% to 100%. The first comparison value is too small, so that the number of the first pixels to be compared is small, and the accuracy of the comparison result of the subsequent display content is reduced, therefore, the value range of the first comparison is preferably selected to be 10% -100%.
Further, the extracting the plurality of pixels in the picture to be displayed as the first pixel to be compared may include: and extracting a plurality of pixels in the picture to be displayed as first pixels to be compared according to a preset rule.
It should be noted that the preset rule is a rule preset by a user, and includes random extraction or extraction according to a set rule, and the set rule may be, for example, extraction of pixels in a specified area, extraction of pixels at the same interval in each pixel row (as shown in fig. 5), extraction of pixels with the same color, or the like.
Illustratively, fig. 6 is a schematic structural diagram of a next frame of the picture to be displayed in fig. 5. The pixel arrangement is the same for each frame of display screen applied to the same display panel. As shown in fig. 6, the next frame of the picture to be displayed also includes 25 pixels 600 including 13 second pixels to be compared 600/1, and referring to fig. 5 and 6, the position of each second pixel to be compared 600/1 in the next frame of the picture to be displayed is the same as the position of one first pixel to be compared 500/1 in the picture to be displayed, respectively.
It should be noted that, as can be seen from the foregoing analysis, each first pixel to be compared 500/1 in fig. 5 corresponds to the second pixel to be compared 600/1 with the same position in fig. 6, each first pixel to be compared 500/1 and the corresponding second pixel to be compared 600/1 can be taken as a comparison group, for example, the first pixel 501 at the upper left corner of the picture to be displayed in fig. 5 and the second pixel 601 at the upper left corner of the next picture in fig. 6 are taken as a comparison group, so as to obtain 13 comparison groups, and whether the gray scales of the two pixels in each comparison group are the same or not is compared, if the gray scales of the two pixels in each comparison group are the same, the first pixel to be compared 500/1 in the comparison group is taken as the target comparison pixel 502, for example, if the gray scales of the first pixel 501 in fig. 5 and the second pixel 601 in fig. 6 are the same, the first pixel 501 is taken as the target comparison pixel 502. For example, as shown in fig. 5, if fig. 5 includes 10 target comparison pixels 502 after comparison, the ratio of the number of the target comparison pixels 502 to the total number of the first pixels to be compared 500/1 is 10/13, and at this time, if 10/13 is greater than the first threshold, it is determined that the display content of the picture to be displayed in fig. 5 is the same as that of the next frame picture in fig. 6, and if 10/13 is less than the first threshold, it is determined that the display content of the picture to be displayed in fig. 5 is different from that of the next frame picture in fig. 6.
Alternatively, the first threshold may be greater than or equal to 50%. When the first threshold is smaller, it can be determined that the display contents of the to-be-displayed picture and the previous or next frame of the picture are the same if fewer first to-be-compared pixels have the same gray scale as the corresponding second to-be-compared pixels, which may result in a decrease in the accuracy of the comparison result, and therefore, the first threshold is preferably set to be greater than or equal to 50%.
In this embodiment, the first threshold may increase as the first ratio decreases. The essential meaning is that if the number of the extracted first pixels to be compared is less, when the proportion of the first pixels to be compared (namely target comparison pixels) with the same gray scale as that of the second pixels to be compared in the total number of the first pixels to be compared is larger, the display content of the picture to be displayed is determined to be the same as that of the picture of the previous frame or the picture of the next frame; if the number of the extracted first pixels to be compared is large, the proportion of the first pixels to be compared (i.e. the target comparison pixels) with the same gray scale as the second pixels to be compared in the total number of the first pixels to be compared can be properly reduced, and the accuracy cannot be obviously influenced because the cardinal number is relatively large. Such an arrangement can ensure that the accuracy of the comparison result is high.
Fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 7, the display panel includes:
an obtaining module 701, configured to obtain a to-be-displayed picture and a previous frame or a next frame of the to-be-displayed picture;
a determining module 702, configured to determine whether display contents of the to-be-displayed picture and the previous frame or the next frame are the same;
a first display module 703, configured to, when it is determined that the to-be-displayed picture is the same as the display content of the previous frame or the next frame, light up each pixel in the to-be-displayed picture according to a first driving period to complete display of the to-be-displayed picture;
a second display module 704, configured to, when it is determined that the display content of the to-be-displayed picture is different from that of the previous frame or the next frame, light up each pixel in the to-be-displayed picture according to a second driving cycle to complete display of the to-be-displayed picture;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel.
The display panel provided by this embodiment adopts the obtaining module to obtain the to-be-displayed picture and the previous frame picture or the next frame picture of the to-be-displayed picture, adopts the judging module to judge whether the to-be-displayed picture is the same as the display content of the previous frame picture or the next frame picture, and adopts the first display module to light each pixel in the to-be-displayed picture according to the first driving period when determining that the to-be-displayed picture is the same as the display content of the previous frame picture or the next frame picture, and lights each pixel in the to-be-displayed picture according to the second driving period when determining that the to-be-displayed picture is different from the display content of the previous frame picture or the next frame picture, so that the driving transistors in each pixel driving circuit of the display panel have the same initial potential, when lighting the pixels in the display panel, the gate-source voltage change directions of each driving transistor are the same, and the currents of the driving transistors corresponding to the pixels of the same gray scale are the same, thereby achieving the beneficial effect of eliminating the afterimage phenomenon.
In this embodiment, the display panel may further include:
the first frequency adjusting module is used for adjusting the display frequency of the display panel to a first display frequency before each pixel in the picture to be displayed is lightened according to a first driving period;
the second frequency adjusting module is used for adjusting the display frequency of the display panel to a second display frequency before each pixel in the picture to be displayed is lightened according to a second driving period;
wherein the first display frequency is less than the second display frequency.
It should be noted that, the advantages of this arrangement are: when each pixel in a plurality of continuous pictures with the same content is lightened according to the first driving period, the total time length of the display panel for displaying the picture content is not increased. In addition, compared with the situation that the display frequency of the display panel is always the second display frequency, the beneficial effect of reducing the power consumption of the display panel can be achieved by adjusting the display frequency of the display panel to the first display frequency before each pixel in the display picture is lightened according to the first driving period.
In this embodiment, the display panel may further include:
the display device comprises a first parameter acquisition module, a second parameter acquisition module and a display module, wherein the first parameter acquisition module is used for acquiring a first set of voltage parameters corresponding to a first display frequency after the display frequency of the display panel is adjusted to the first display frequency;
the first voltage determining module is used for determining voltage data corresponding to each pixel in the picture to be displayed according to the first set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
the second parameter acquisition module is used for acquiring a second set of voltage parameters corresponding to a second display frequency after the display frequency of the display panel is adjusted to the second display frequency;
the second voltage determining module is used for determining voltage data corresponding to each pixel in the picture to be displayed according to the second set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
the first set of voltage parameters refers to a set of first working voltages corresponding to a pixel when the gray scales of the pixel are sequentially 0-M gray scales; the second set of voltage parameters refers to a set of second working voltages corresponding to the pixel when the gray scales of the pixel are sequentially 0-M gray scales; for the pixel with the X gray scale, the brightness of the pixel is a first brightness at a first working voltage, the brightness of the pixel is a second brightness at a second working voltage, the first brightness is greater than the second brightness, and X belongs to [0, M ], wherein M refers to the maximum gray scale value of the display panel. The values are the same as before and are not described in detail here.
In this embodiment, the determining module may specifically include:
the first extraction unit is used for extracting a plurality of pixels in the picture to be displayed as first pixels to be compared, and the ratio of the number of the first pixels to be compared to the total number of the pixels in the picture to be displayed is a first ratio;
a second extracting unit, configured to extract multiple pixels in the previous frame or the next frame as second pixels to be compared, where the second pixels to be compared correspond to the first pixels to be compared one by one, and a position of the second pixel to be compared in the previous frame or the next frame is the same as a position of the corresponding first pixel to be compared in the frame to be displayed;
and the ratio judging unit is used for taking a first pixel to be compared with a second pixel to be compared, which has the same gray scale as the gray scale of the first pixel to be compared, as a target comparison pixel, and judging whether the ratio of the number of the target comparison pixels to the total number of the first pixels to be compared is greater than a first threshold value, if so, the display content of the picture to be displayed is the same as that of the previous frame of picture or the next frame of picture, and if not, the display content of the picture to be displayed is different from that of the previous frame of picture or the next frame of picture.
Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 8, the display device 80 includes a display panel 81 according to any embodiment of the present invention.
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 modifications, rearrangements, combinations 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 (14)
1. A method of driving a display panel, comprising:
acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed;
judging whether the display content of the picture to be displayed is the same as that of the previous frame or the next frame;
if so, lightening each pixel in the picture to be displayed according to a first driving period so as to finish the display of the picture to be displayed;
if not, lightening each pixel in the picture to be displayed according to a second driving period so as to finish the display of the picture to be displayed;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
wherein the second drive period does not include the first reset phase and the initialization phase;
when the pixels in the display panel are lightened, the grid-source voltage change directions of the driving transistors in each pixel driving circuit are the same.
2. The driving method according to claim 1, wherein before lighting each pixel in the frame to be displayed in the first driving period, the method further comprises: adjusting the display frequency of the display panel to a first display frequency;
before lighting each pixel in the to-be-displayed picture according to the second driving period, the method further includes: adjusting the display frequency of the display panel to a second display frequency;
wherein the first display frequency is less than the second display frequency.
3. The driving method according to claim 2, wherein after the adjusting the display frequency of the display panel to the first display frequency, further comprising: acquiring a first set of voltage parameters corresponding to the first display frequency;
determining voltage data corresponding to each pixel in the picture to be displayed according to the first set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
after the adjusting the display frequency of the display panel to the second display frequency, the method further includes:
acquiring a second set of voltage parameters corresponding to the second display frequency;
determining voltage data corresponding to each pixel in the picture to be displayed according to the second set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
the first set of voltage parameters refers to a set of first working voltages corresponding to the pixel when the gray scales of the pixel are sequentially 0-M in order; the second set of voltage parameters refers to a set of second working voltages corresponding to the pixel when the gray scales of the pixel are sequentially 0-M gray scales; for the pixel with the X gray scale, the brightness of the pixel is the first brightness when the first working voltage is applied, the brightness of the pixel is the second brightness when the second working voltage is applied, the first brightness is larger than the second brightness, and X belongs to [0, M ], wherein M is the maximum gray scale value.
4. The driving method according to claim 2, wherein the first display frequency is 50Hz, and the second display frequency is 60 Hz.
5. The driving method according to claim 1, wherein the determining whether the display content of the to-be-displayed picture is the same as that of the previous frame or the next frame comprises:
extracting a plurality of pixels in the picture to be displayed as first pixels to be compared, wherein the ratio of the number of the first pixels to be compared to the total number of the pixels in the picture to be displayed is a first ratio;
extracting a plurality of pixels in the previous frame or the next frame as second pixels to be compared, wherein the second pixels to be compared correspond to the first pixels to be compared one by one, and the positions of the second pixels to be compared in the previous frame or the next frame are the same as the positions of the corresponding first pixels to be compared in the pictures to be displayed;
and taking a first pixel to be compared with the second pixel to be compared, wherein the gray scale of the first pixel to be compared is the same as that of the second pixel to be compared, as a target comparison pixel, and judging whether the ratio of the number of the target comparison pixels to the total number of the first pixels to be compared is greater than a first threshold value, if so, the display content of the picture to be displayed is the same as that of the previous frame picture or the next frame picture, and if not, the display content of the picture to be displayed is different from that of the previous frame picture or the next frame picture.
6. The driving method according to claim 5, wherein the first ratio has a value ranging from 10% to 100%.
7. The driving method according to claim 5, wherein the first threshold value is greater than or equal to 50%.
8. The driving method according to claim 5, wherein the first threshold value increases as the first ratio decreases.
9. The driving method according to claim 5, wherein the extracting the plurality of pixels in the picture to be displayed as the first pixel to be compared comprises:
and extracting a plurality of pixels in the picture to be displayed as first pixels to be compared according to a preset rule.
10. A display panel, comprising:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a picture to be displayed and a previous frame picture or a next frame picture of the picture to be displayed;
the judging module is used for judging whether the display content of the picture to be displayed is the same as that of the previous frame of picture or the next frame of picture;
the first display module is used for lighting each pixel in the picture to be displayed according to a first driving period to finish the display of the picture to be displayed when the picture to be displayed is determined to be the same as the display content of the previous frame or the next frame;
the second display module is used for lighting each pixel in the picture to be displayed according to a second driving period when the picture to be displayed is determined to be different from the display content of the previous frame or the next frame so as to finish the display of the picture to be displayed;
each pixel corresponds to one pixel driving circuit;
the first driving period includes: a first reset phase for writing a first reset signal into the pixel drive circuit; an initialization stage for writing a first initial potential or a second initial potential into the pixel driving circuit; a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
the second driving period includes: a second reset phase for writing a second reset signal into the pixel drive circuit; a data input stage for writing voltage data into the pixel driving circuit; a light emitting stage for lighting the pixel;
wherein the second drive period does not include the first reset phase and the initialization phase;
when the pixels in the display panel are lightened, the grid-source voltage change directions of the driving transistors in each pixel driving circuit are the same.
11. The display panel according to claim 10, comprising:
the first frequency adjusting module is used for adjusting the display frequency of the display panel to a first display frequency before each pixel in the picture to be displayed is lightened according to a first driving period;
the second frequency adjusting module is used for adjusting the display frequency of the display panel to a second display frequency before each pixel in the picture to be displayed is lightened according to a second driving period;
wherein the first display frequency is less than the second display frequency.
12. The display panel according to claim 11, comprising:
the display device comprises a first parameter acquisition module, a second parameter acquisition module and a display module, wherein the first parameter acquisition module is used for acquiring a first set of voltage parameters corresponding to a first display frequency after the display frequency of the display panel is adjusted to the first display frequency;
the first voltage determining module is used for determining voltage data corresponding to each pixel in the picture to be displayed according to the first set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
the second parameter acquisition module is used for acquiring a second set of voltage parameters corresponding to a second display frequency after the display frequency of the display panel is adjusted to the second display frequency;
the second voltage determining module is used for determining voltage data corresponding to each pixel in the picture to be displayed according to the second set of voltage parameters and the gray scale of each pixel in the picture to be displayed;
the first set of voltage parameters refers to a set of first working voltages corresponding to a pixel when the gray scales of the pixel are sequentially 0-M gray scales; the second set of voltage parameters refers to a set of second working voltages corresponding to the pixel when the gray scales of the pixel are sequentially 0-M gray scales; for the pixel with the X gray scale, the brightness of the pixel is the first brightness when the first working voltage is applied, the brightness of the pixel is the second brightness when the second working voltage is applied, the first brightness is larger than the second brightness, and X belongs to [0, M ], wherein M is the maximum gray scale value.
13. The display panel according to claim 10, wherein the determining module specifically comprises:
the first extraction unit is used for extracting a plurality of pixels in the picture to be displayed as first pixels to be compared, and the ratio of the number of the first pixels to be compared to the total number of the pixels in the picture to be displayed is a first ratio;
a second extracting unit, configured to extract multiple pixels in the previous frame or the next frame as second pixels to be compared, where the second pixels to be compared correspond to the first pixels to be compared one by one, and a position of the second pixel to be compared in the previous frame or the next frame is the same as a position of the corresponding first pixel to be compared in the frame to be displayed;
and the ratio judging unit is used for taking a first pixel to be compared with a second pixel to be compared, which has the same gray scale as the gray scale of the first pixel to be compared, as a target comparison pixel, and judging whether the ratio of the number of the target comparison pixels to the total number of the first pixels to be compared is greater than a first threshold value, if so, the display content of the picture to be displayed is the same as that of the previous frame of picture or the next frame of picture, and if not, the display content of the picture to be displayed is different from that of the previous frame of picture or the next frame of picture.
14. A display device comprising the display panel of any one of claims 10-13.
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| CN114758615B (en) * | 2021-01-11 | 2023-12-12 | 上海和辉光电股份有限公司 | Driving method and driving system of display panel |
| CN112951161B (en) * | 2021-02-24 | 2023-04-28 | 厦门天马微电子有限公司 | Display panel driving method and display device |
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| KR102007369B1 (en) * | 2012-11-27 | 2019-08-05 | 엘지디스플레이 주식회사 | Timing controller, driving method thereof, and display device using the same |
| CN103761941B (en) * | 2014-01-29 | 2016-05-18 | 京东方科技集团股份有限公司 | A kind of image residue method, device and display unit of reducing |
| CN106652915A (en) * | 2017-02-09 | 2017-05-10 | 鄂尔多斯市源盛光电有限责任公司 | Pixel circuit, display panel, display device and drive method |
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