CN110322827B - Digital driving method of display panel and display panel - Google Patents
Digital driving method of display panel and display panel Download PDFInfo
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- CN110322827B CN110322827B CN201910754575.5A CN201910754575A CN110322827B CN 110322827 B CN110322827 B CN 110322827B CN 201910754575 A CN201910754575 A CN 201910754575A CN 110322827 B CN110322827 B CN 110322827B
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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
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
Abstract
The embodiment of the invention discloses a digital driving method of a display panel and the display panel, wherein the display panel comprises m rows and n columns of sub-pixels arranged in an array manner, a plurality of scanning lines and a plurality of data lines, each scanning line is connected with one row of sub-pixels, each data line is connected with one column of sub-pixels, and m and n are integers more than or equal to 1; the digital driving method of the display panel includes: simultaneously providing scanning pulse signals to the scanning lines and simultaneously providing first data voltages to the data lines; and supplying a second data voltage to each data line one by one, and simultaneously supplying a scanning pulse signal to a scanning line connected with a sub-pixel needing to be written with the second data voltage during the period of supplying the second data voltage to one data line, so that the scanning time of the sub-pixel in each row is irrelevant to the row number of the sub-pixels in the display panel, and the problem of abnormal display caused by short scanning time of the sub-pixel in each row due to excessive row number of the conventional display panel is solved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a digital driving method of a display panel and the display panel.
Background
With the development of display technology, digital driving is more and more widely used due to its advantages of low image noise and fast switching speed.
However, in the conventional digital driving scanning algorithm, the scanning time of each row of sub-pixels is related to the number of rows of the display panel, and for the display panel with a large number of rows of sub-pixels, the scanning time of each row of sub-pixels is very short, which results in poor display effect.
Disclosure of Invention
The invention provides a digital driving method of a display panel and the display panel, so that the scanning duration of each row of pixels is irrelevant to the number of rows of sub-pixels in the display panel, and the display effect is improved.
In a first aspect, an embodiment of the present invention provides a digital driving method for a display panel, where the display panel includes m rows and n columns of sub-pixels arranged in an array, a plurality of scan lines and a plurality of data lines, each scan line is connected to one row of sub-pixels, and each data line is connected to one column of sub-pixels, where m and n are integers greater than or equal to 1; the digital driving method of the display panel includes:
simultaneously providing scanning pulse signals to the scanning lines and simultaneously providing first data voltages to the data lines;
and supplying a second data voltage to each data line one by one, and simultaneously supplying a scanning pulse signal to a scanning line connected with a sub-pixel needing to write the second data voltage during the period of supplying the second data voltage to one data line.
Alternatively, m > n + 1.
Optionally, the first data voltage is a bright-state data voltage, and the second data voltage is a black-state data voltage.
Optionally, the first data voltage is a black data voltage, and the second data voltage is a bright data voltage.
Optionally, the simultaneously providing the scan pulse signal to each scan line and the first data voltage to each data line includes:
at the beginning of each sub-frame, a scan pulse signal is simultaneously supplied to each scan line, and a first data voltage is simultaneously supplied to each data line.
Optionally, each sub-pixel includes a digital driving pixel circuit, where the digital driving pixel circuit includes a light emitting device and a light emission control module electrically connected to the light emitting device, supplies the second data voltage to each data line one by one, and simultaneously supplies a scan pulse signal to a scan line connected to the sub-pixel where the second data voltage needs to be written during the period of supplying the second data voltage to one data line, and the method includes:
in any subframe, when second data voltages are supplied to the data lines one by one, the light-emitting control modules in the digital driving pixel circuits are controlled to be turned off;
after supplying the second data voltage to all the data lines, the method further comprises:
and controlling the conduction of the light-emitting control module in each digital driving pixel circuit.
Optionally, in a subframe, the signal output to the at least one scan line includes at least two scan pulse signals.
Optionally, the digital driving method comprises a first stage and a second stage;
in the first stage, the scanning pulse signals provided for the scanning lines are all overlapped;
in the second stage, there is an overlap of the scan pulse signals supplied to at least two scan lines.
Optionally, in the second stage, the scan pulse signals provided to the scan lines include scan pulse signals with different pulse widths.
In a second aspect, an embodiment of the present invention further provides a display panel, which is driven by the driving method of the display panel provided in the first aspect.
The embodiment of the invention provides a digital driving method of a display panel and the display panel, wherein the display panel comprises m rows of sub-pixels arranged in an n-column array, a plurality of scanning lines and a plurality of data lines, each scanning line is connected with one row of sub-pixels, each data line is connected with one column of sub-pixels, and m and n are integers which are more than or equal to 1; the digital driving method of the display panel includes: simultaneously providing scanning pulse signals to the scanning lines and simultaneously providing first data voltages to the data lines; and supplying a second data voltage to each data line one by one, and simultaneously supplying a scanning pulse signal to a scanning line connected with a sub-pixel needing to be written with the second data voltage during the period of supplying the second data voltage to one data line, so that the scanning time of the sub-pixel in each row is irrelevant to the row number of the sub-pixels in the display panel, and the problem of abnormal display caused by short scanning time of the sub-pixel in each row due to excessive row number of the conventional display panel is solved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a flowchart of a digital driving method of a display panel according to an embodiment of the present invention;
FIG. 3 is a timing diagram illustrating digital driving of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 5 is a flowchart of a digital driving method for a display panel according to another embodiment of the present invention;
fig. 6 is a flowchart of another digital driving method for a display panel 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.
As described in the background art, in the conventional digital driving scanning algorithm, the scanning time of each row of pixels is related to the number of rows of the display panel, so that for a display panel with a large number of rows, the scanning time of each row of pixels is very short, which results in a poor display effect. The inventor finds that the above problem occurs because the conventional digital driving scanning algorithm usually uses a progressive scanning method to scan one row of sub-pixels and then scan the next row of sub-pixels. For example, for the conventional subfield scanning method, one frame is usually divided into a plurality of subframes, and all the subpixels in the display panel are scanned one by one row in each subframe, so the time for scanning each row of subpixels is very short, and when the subpixels are scanned, corresponding data voltages are usually written into the subpixels, so that the time for writing the data voltages into the subpixels is very short, which causes insufficient writing time of the data voltages, and the data voltages cannot be written completely, which causes abnormal gray scale display, and the display effect is poor.
In view of the above reasons, an embodiment of the present invention provides a digital driving method for a display panel, fig. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, fig. 2 is a flowchart of the digital driving method for the display panel provided by the embodiment of the present invention, fig. 3 is a timing diagram of digital driving of the display panel provided by the embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 3, the display panel includes m rows and n columns of sub-pixels 110 arranged in an array, a plurality of scan lines (S1, S2, S3, S4 … …) and a plurality of data lines (D1, D2, D3, D4 … …), each scan line connects one row of sub-pixels, each data line connects one column of sub-pixels, where m and n are integers greater than or equal to 1; the digital driving method of the display panel includes:
with continued reference to fig. 1, the display panel may further include a scan driving circuit 120, a data driving circuit 130, a data processor 140, and a timing controller 150. The data stream is shown to enter the data processor 140, and the timing controller 150 controls the driving timings of the scan driving circuit 120 and the data driving circuit 130, respectively. Specifically, when the display panel is driven by a digital driving method, the data voltages provided to the data lines generally include only black-state data voltages and bright-state data voltages, and the black-state data voltages and the bright-state data voltages may be constant values. In the digital driving method of the display panel, a frame of a display screen can be divided into a plurality of subframes, fig. 3 schematically shows driving timing in two subframes, and referring to fig. 3, each subframe can include a data writing phase t1 and a light emitting driving phase t2, wherein the light emitting driving phase t2 time can be different in different subframes in a frame, and for example, when a frame is divided into four subframes, the ratio of the light emitting driving phase time of the four subframes can be 1:2:4: 8. If the sub-pixel 110 is finally written with the black data voltage in the data writing stage in a sub-frame, the sub-pixel 110 does not emit light in the driving light-emitting stage of the sub-frame; if the sub-pixel 110 is finally written with the bright-state data voltage in the data writing stage in a sub-frame, the sub-pixel 110 emits light in the driving light-emitting stage of the sub-frame, and the light-emitting duration of the sub-pixel 110 in one frame is controlled by controlling whether the sub-pixel 110 emits light in different sub-frames (i.e., by controlling different data voltages input to the sub-pixel 110 in different sub-frames), so as to realize the display of different gray scales. The first data voltage may be a black data voltage or a bright data voltage.
Fig. 4 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention, and referring to fig. 4, the pixel circuit includes a first transistor T1, a second transistor T2, a third transistor T3, a storage capacitor Cst, a data voltage input terminal Vdata, a light emitting device D1, a Scan signal input terminal Scan and a light emission control signal input terminal EM, a first power voltage input terminal VDD, and a second power voltage input terminal VSS. The Scan signal input terminal Scan may be connected to a Scan line, and the data voltage input terminal Vdata may be connected to a data line. Referring to fig. 4, the scan pulse signal is used to control the turn-on of the first transistor T1, so that when the first transistor T1 is turned on, the data voltage on the data line can be written into the gate of the second transistor T2 through the first transistor T1, and the second transistor T2 serves as a driving transistor of the pixel circuit. It should be noted that the digital driving method provided in this embodiment is not only applicable to the display panel including the pixel circuit shown in fig. 4, but also applicable to the display panel including the pixel circuit shown in fig. 4 for explaining whether the scan pulse signal can be used to control whether the data voltage can be written into the sub-pixel 110.
After providing a scan pulse signal to the scan line, a data voltage may be written into the sub-pixel 110 electrically connected to the scan line; if the scan pulse signal is not supplied to the scan line, the data voltage cannot be written into the sub-pixel 110 electrically connected to the scan line. Specifically, referring to fig. 3, the full-screen Data signal Data includes two voltages, where a low level may represent the first Data voltage. In this step, the scan pulse signals are simultaneously provided to the scan lines, that is, all the pixels in the row of the display panel are simultaneously scanned, and the first data voltage is simultaneously provided to the data lines, so that the first data voltage is simultaneously written into each sub-pixel 110 in the display panel. In fig. 3, Scan1, Scan2, Scan3, Scan4, Scan5, Scan6, and Scan7 … … Scan may represent Scan signals input to the sub-pixels in rows 1, 2, 3, 4, 5, 6, and 7 … …, respectively, and referring to fig. 3, the Scan pulse signal may be a low-level pulse signal, and step 210 in fig. 2 corresponds to a stage indicated by t11, at which all the sub-pixels 110 in a row are scanned simultaneously, and writing of the first data voltage is completed.
Specifically, in a subframe, the data voltages to be written by different sub-pixels 110 may be different, and therefore, after the first data voltage is written to each sub-pixel 110 in step 210, the data voltage needs to be written again to the sub-pixel 110 corresponding to the second data voltage in the display panel, and the specific writing manner may be to write the second data voltage to the sub-pixel 110 corresponding to the second data voltage in the display panel column by column. When writing the second data voltage, providing the second data voltage to each data line one by one, and providing a scan pulse signal to the scan line connected to the sub-pixel 110 in which the second data voltage needs to be written simultaneously during the period of providing the second data voltage to one data line, so that the sub-pixel 110 in which the second data voltage needs to be written is turned on in the sub-pixel 110 electrically connected to the data line, and it is ensured that the data voltage can be written, and the scan pulse signal is not provided to the scan line connected to the sub-pixel 110 in which the first data voltage needs to be written, so that the sub-pixel 110 in which the first data voltage needs to be written maintains the first data voltage written in step 210. Referring to fig. 2 and 3, step 220 in fig. 2 may correspond to a stage corresponding to t12 in fig. 3, and referring to fig. 1 and 3, the first three columns of sub-pixels 110 in the display panel are taken as an example to illustrate that, in the first column of sub-pixels 110, no sub-pixel 110 requiring writing of the second data voltage is present, in the second column of sub-pixels 110, sub-pixels 110 located in the first row, the third row and the seventh row are required to write the second data voltage, and in the third column of sub-pixels 110, sub-pixels 110 located in the first row, the second row, the fourth row and the mth row are required to write the second data voltage; when the second data voltage is supplied to the first column of sub-pixels r1 electrically connected to the first data line D1, no scan pulse signal is supplied to each scan line; when a second data voltage is supplied to the second column sub-pixel r2 electrically connected to the second data line D2, a scan pulse signal is simultaneously supplied to scan lines electrically connected to the first, third, and seventh rows of sub-pixels 110, and the second data voltage is written to the sub-pixels 110 positioned in the first, third, and seventh rows of the second column of sub-pixels 110; when the second data voltage is supplied to the third column subpixel r3 electrically connected to the third data line D3, the scan pulse signal is supplied to the scan line electrically connected to the first, second, fourth, and mth row subpixels 110, and the second data voltage is written to the subpixels 110 in the first, second, fourth, and mth rows of the second column subpixels 110. Unlike the prior art, in this step, the sub-pixels 110 are not scanned line by line (after one row of sub-pixels 110 is scanned, the next row of sub-pixels 110 is scanned), but during the period of supplying the second data voltage to one data line, the row of the sub-pixels 110 in which the second data voltage needs to be written in the sub-pixels 110 electrically connected to the data line is scanned simultaneously, so the scanning time for each row of sub-pixels 110 is independent of the number of rows of the sub-pixels 110 in the display panel, and is dependent on the number of columns of the sub-pixels 110 in the display panel and the number of sub-pixels 110 in each row of the sub-pixels 110 corresponding to the second data voltage. Because the scanning time of each row of sub-pixels 110 is irrelevant to the number of rows of sub-pixels 110, the problem that the scanning time of each row of sub-pixels 110 is too short due to more rows of sub-pixels 110 in the display panel can be avoided, and abnormal display caused by shorter scanning time of each row of sub-pixels 110 due to more rows of the conventional display panel can be avoided.
According to the digital driving method of the display panel provided by the embodiment of the invention, the scanning pulse signals are simultaneously provided for all the scanning lines, and the first data voltage is simultaneously provided for all the data lines; and providing a second data voltage to each data line one by one, and providing a scanning pulse signal to the scanning line connected with the sub-pixels needing to be written with the second data voltage during the period of providing the second data voltage to one data line, so that the scanning time of the sub-pixels in each row is irrelevant to the row number of the sub-pixels in the display panel, and the problem of abnormal display caused by short scanning time of the sub-pixels in each row due to excessive row number of the conventional display panel is solved.
On the basis of the technical scheme, m is greater than n +1 optionally.
Specifically, the conventional display panel, especially a mobile phone, is usually a vertical display panel, and the number m of rows of sub-pixels 110 in the vertical display panel is usually much larger than the number n of columns of sub-pixels 110. In the vertical display panel, the problem of abnormal display caused by excessive rows of the sub-pixels 110 is particularly serious. In the embodiment of the present invention, the first data voltages are written into all the sub-pixels 110 in all the display panels at the same time by simultaneously providing the scan pulse signals to the scan lines and simultaneously providing the first data voltages to the data lines; by supplying the second data voltage to the data lines one by one and simultaneously supplying the scan pulse signal to the scan line to which the sub-pixel 110 to which the second data voltage needs to be written is connected during the period in which the second data voltage is supplied to one data line, the data voltage writing time to each sub-pixel 110 can be extended. For example, in one sub-frame, the total scanning time for all the sub-pixels 110 in the display panel is T, when the conventional scanning method is adopted, the scanning time (the time corresponding to the width of each scanning pulse signal) for each row of the sub-pixels 110 is T/m, and when the conventional scanning algorithm is adopted, the data voltages of one row of the sub-pixels 110 are usually written simultaneously, and the time for writing the data voltages into each sub-pixel 110 is T/m. When the digital driving scanning algorithm provided by the embodiment of the present invention is adopted, the time corresponding to the width of each scanning pulse signal is T/n +1, and the time corresponding to the width of each scanning pulse signal is equal to the time for writing the data voltage into one sub-pixel 110. Since m > n +1, T/m < T/n +1, the digital driving method provided by this embodiment can widen the width of a single scan pulse signal, and accordingly, the scan time for scanning each row of sub-pixels 110 is lengthened, so that the time for writing data voltages into the sub-pixels 110 is lengthened, and further, the data voltages corresponding to the sub-pixels 110 can be sufficiently written, so that the sub-pixels 110 can normally display gray scales, and the display effect is improved.
On the basis of the above technical solution, optionally, the first data voltage is a bright-state data voltage, and the second data voltage is a black-state data voltage.
As described above, in the digital driving method, the data voltage written to the subpixel 110 generally includes only the bright-state data voltage and the black-state data voltage. Providing scanning pulse signals to all scanning lines simultaneously, and providing bright-state data voltages to all data lines simultaneously, so that bright-state data voltages are written into all sub-pixels 110 in the display panel initially, and providing black-state data voltages to the data lines one by one when the data voltages corresponding to some sub-pixels 110 are black-state data voltages, and scanning the row where the sub-pixel 110 which needs to be written with the black-state data voltages in the sub-pixels 110 electrically connected with the data lines is located while providing the black-state data voltages to one data line; furthermore, the scanning time of each line is independent of the number of lines of the sub-pixels 110 in the display panel, and the problem of abnormal display caused by short scanning time of each line of the sub-pixels 110 due to excessive number of lines in the conventional display panel is solved.
Optionally, the first data voltage is a black data voltage, and the second data voltage is a bright data voltage.
Specifically, scanning pulse signals are provided to the scanning lines at the same time, and bright-state data voltages are provided to the data lines at the same time, so that black-state data voltages are initially written to all the sub-pixels 110 in the display panel, and when the data voltages corresponding to some sub-pixels 110 are bright-state data voltages, bright-state data voltages are provided to the data lines one by one, and while the black-state data voltages are provided to one data line, the row where the sub-pixel 110 which needs to be written with the bright-state data voltages is located in the sub-pixels 110 electrically connected to the data line is scanned; furthermore, the scanning time of each line is independent of the number of lines of the sub-pixels 110 in the display panel, and the problem of abnormal display caused by short scanning time of each line of the sub-pixels 110 due to excessive number of lines in the conventional display panel is solved.
Fig. 5 is a flowchart of another digital driving method of a display panel according to an embodiment of the present invention, and referring to fig. 5, the digital driving method includes:
optionally, the starting stage of each subframe may be a time when each subframe enters; after entering a sub-frame, the scanning pulse signals are simultaneously provided to the scanning lines, and the first data voltages are simultaneously provided to the data lines, so that the time of each sub-frame can be fully utilized, the subsequent writing of the second data voltages can have sufficient time, and the data voltages can be fully written into the sub-pixels 110, thereby ensuring good display effect.
On the basis of the above technical solution, optionally, each sub-pixel 110 includes a digital driving pixel circuit, wherein, referring to fig. 3, the digital driving pixel circuit includes a light emitting device D1 and a light emitting control module 410 electrically connected to the light emitting device D1, wherein, the third transistor T3 is used as the light emitting control module 410;
fig. 6 is a flowchart of another digital driving method of a display panel according to an embodiment of the present invention, and referring to fig. 6, the digital driving method includes:
in step 530, after the second data voltage is provided to all the data lines, the light-emitting control modules in the digital driving pixel circuits are controlled to be turned on.
Specifically, referring to fig. 3 and 4, taking the third transistor T3 as a P-type transistor as an example, when the second data voltage is provided to each data line one by one, the light-emitting control signal input terminal EM inputs a high level to control the light-emitting control module in the digital driving pixel circuit of each sub-pixel 110 to turn off, so as to ensure that each sub-pixel 110 does not emit light when the second data voltage is written to each sub-pixel 110, and after the second data voltage is provided to all data lines, the light-emitting control signal input terminal EM inputs a low level to control the light-emitting control module in each digital driving pixel circuit to turn on, so as to make the sub-pixels 110 in the display panel emit light together after the data voltage corresponding to each sub-pixel 110 is written, so as to facilitate the control of the light-emitting time of each sub-pixel 110 in a sub-frame, and further ensure the normal display of gray scale, is favorable for improving the display effect.
In addition, during the period of supplying the scanning pulse signal to each scanning line simultaneously and supplying the first data voltage to each data line simultaneously, the light-emitting control module may be controlled to be turned off, so as to avoid the influence of the light-emitting device D1 emitting light on the display effect when writing the first data voltage.
With continuing reference to fig. 3, on the basis of the above technical solution, the method for driving a display panel further includes:
in a subframe, the signal output to at least one scan line includes at least two scan pulse signals.
Specifically, in a sub-frame, the number of scan pulse signals output to a scan line is determined by the number of sub-pixels 110 in a row of sub-pixels 110 electrically connected to the scan line, to which the second data voltage needs to be written. In a sub-frame, the signal output to the at least one scan line includes at least two scan pulse signals, and the second data voltage may be written to two sub-pixels 110 in the at least one row of sub-pixels 110. Moreover, the signal output to at least one scan line includes at least two scan pulse signals, so that the scanning time for a row of sub-pixels 110 is relatively longer, which is more beneficial to the sufficient writing of the second data voltage, and ensures a good display effect.
With continued reference to fig. 3, on the basis of the above technical solution, optionally, the digital driving method includes a first stage t11 and a second stage t 12;
in the first stage t11, the scan pulse signals supplied to the respective scan lines are all overlapped;
in the second stage t12, there is overlap in the scan pulse signals supplied to at least two scan lines.
Specifically, in the first stage, the scan pulse signals are simultaneously supplied to the scan lines, and the scan pulse signals supplied to the scan lines are all overlapped. In this case, it is necessary to simultaneously provide the scan pulse signals to the sub-pixels in the same column corresponding to the second data voltage, and the scan pulse signals provided to the at least two scan lines overlap, so that the second data voltage is ensured to be normally written into the at least two sub-pixels 110 in the same column, and the display effect is ensured.
With reference to fig. 3, based on the above technical solution, optionally, in the second stage t12, the scan pulse signals provided to the scan lines include scan pulse signals with different pulse widths.
Specifically, in some display screens, the data voltages corresponding to the sub-pixels in adjacent columns in the same row may all be the second data voltage, and when the second data voltage is supplied to the data line one by one, for some rows of pixels, two or more scan pulse signals need to be continuously supplied, so that the width of the superimposed scan pulse signals is widened, and the scan pulse signals supplied to the scan line include scan pulse signals with different pulse widths. Therefore, the scanning pulse signals provided for the scanning lines comprise the scanning pulse signals with different pulse widths, and when the data voltages corresponding to the adjacent sub-pixels in the same row are all the second data voltages, the second data voltages can be normally written, so that a good display effect is ensured.
The embodiment of the invention also provides a display panel, the structural schematic diagram of the display panel can be seen in fig. 1, and the display panel is driven by the driving method of the display panel provided by any embodiment of the invention. The display panel provided by the embodiment of the invention is driven by the driving method of the display panel provided by any embodiment of the invention, and simultaneously provides scanning pulse signals for all scanning lines and first data voltages for all data lines; and providing a second data voltage to each data line one by one, and providing a scanning pulse signal to the scanning line connected with the sub-pixels needing to be written with the second data voltage during the period of providing the second data voltage to one data line, so that the scanning time of the sub-pixels in each row is irrelevant to the row number of the sub-pixels in the display panel, and the problem of abnormal display caused by short scanning time of the sub-pixels in each row due to excessive row number of the conventional display panel is solved.
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 (8)
1. The digital driving method of the display panel is characterized in that the display panel comprises m rows and n columns of sub-pixels arranged in an array manner, a plurality of scanning lines and a plurality of data lines, wherein each scanning line is connected with one row of the sub-pixels, each data line is connected with one column of the sub-pixels, and m and n are integers which are more than or equal to 1; m > n +1, the digital driving method of the display panel includes:
providing scanning pulse signals to the scanning lines at the same time, and providing first data voltages to the data lines at the same time;
providing a second data voltage to each data line one by one, and providing a scanning pulse signal to the scanning line connected with the sub-pixel needing to be written with the second data voltage simultaneously during the period of providing the second data voltage to one data line; the scanning time of each row of sub-pixels is related to the number of columns of sub-pixels in the display panel and the number of sub-pixels corresponding to the second data voltage in each row of sub-pixels; the time corresponding to the width of each scanning pulse signal is T/n + 1;
dividing a frame of display picture into a plurality of subframes, wherein each subframe comprises a data writing phase and a driving light-emitting phase, the driving light-emitting phases of the plurality of subframes are different in time, and the data writing phase comprises a first phase and a second phase;
in the first stage, the scanning pulse signals provided to the scanning lines are all overlapped;
in the second phase, the scanning pulse signals provided to at least two scanning lines are overlapped;
the method further comprises the following steps: the luminous time of the sub-pixels in one frame is controlled by controlling whether the sub-pixels emit light in different sub-frames, so that the display of different gray scales is realized.
2. The method according to claim 1, wherein the first data voltage is a bright data voltage and the second data voltage is a black data voltage.
3. The method according to claim 1, wherein the first data voltage is a black data voltage and the second data voltage is a bright data voltage.
4. The digital driving method of the display panel according to claim 1, wherein the simultaneously supplying a scan pulse signal to each of the scan lines and a first data voltage to each of the data lines comprises:
and simultaneously supplying scanning pulse signals to the scanning lines and simultaneously supplying first data voltages to the data lines at the beginning of each subframe.
5. The digital driving method of a display panel according to claim 1, wherein each sub-pixel includes a digital driving pixel circuit, wherein the digital driving pixel circuit includes a light emitting device and a light emission control module electrically connected to the light emitting device, the supplying of the second data voltage to each of the data lines one by one, and the supplying of the scan pulse signal to the scan line connected to the sub-pixel to which the second data voltage is to be written, during the supplying of the second data voltage to one of the data lines, comprises:
in any subframe, when second data voltages are supplied to the data lines one by one, the light-emitting control modules in the digital driving pixel circuits are controlled to be turned off;
after supplying the second data voltage to all the data lines, the method further comprises:
and controlling the conduction of the light-emitting control module in each digital driving pixel circuit.
6. The digital driving method of a display panel according to claim 1, wherein the signal outputted to at least one of the scan lines in a subframe comprises at least two scan pulse signals.
7. The digital driving method of the display panel according to claim 1, wherein in the second phase, the scan pulse signals supplied to the scan lines include scan pulse signals with different pulse widths.
8. A display panel driven by the driving method of the display panel according to any one of claims 1 to 7.
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| CN201910754575.5A CN110322827B (en) | 2019-08-15 | 2019-08-15 | Digital driving method of display panel and display panel |
| KR1020227003627A KR102648334B1 (en) | 2019-08-15 | 2020-05-26 | Digital driving method and display panel of display panel |
| PCT/CN2020/092393 WO2021027358A1 (en) | 2019-08-15 | 2020-05-26 | Digital driving method for display panel and display panel |
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| CN110322827B (en) * | 2019-08-15 | 2022-05-10 | 成都辰显光电有限公司 | Digital driving method of display panel and display panel |
| CN114187859B (en) * | 2020-09-14 | 2024-03-15 | 京东方科技集团股份有限公司 | Display driving method and display device |
| CN117392953B (en) * | 2023-12-12 | 2024-04-09 | 惠科股份有限公司 | Driving method, driving circuit and display device of display panel |
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| KR102648334B1 (en) | 2024-03-15 |
| WO2021027358A1 (en) | 2021-02-18 |
| CN110322827A (en) | 2019-10-11 |
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