CN111028813B - 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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- CN111028813B CN111028813B CN201911413301.6A CN201911413301A CN111028813B CN 111028813 B CN111028813 B CN 111028813B CN 201911413301 A CN201911413301 A CN 201911413301A CN 111028813 B CN111028813 B CN 111028813B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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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
- G09G3/32—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 semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
Abstract
The embodiment of the invention discloses a driving method and a driving device of a display panel and a display device. The driving method includes: acquiring an image to be displayed; providing display signals to the sub-pixel units by using the scanning lines and the data lines according to an image to be displayed; displaying an image to be displayed according to the display signal; the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different. The technical scheme provided by the embodiment of the invention can enable the periods of the scanning pulse signals in each frame of the same row of sub-pixel units to be not completely the same, namely the scanning frequency is not fixed, so that the radiation energy can be dispersed at more frequency positions, the energy value at a frequency doubling position is reduced, the electromagnetic interference is favorably reduced, and the influence of the display panel on other peripheral electronic products is reduced.
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
Currently, with the development of Display technology, Liquid Crystal Display panels (LCD) and Organic Light Emitting Display panels (OLED) become two major Display panels in the Display field, and are widely applied to computers, mobile phones, wearable devices, vehicles and other applications.
Generally, based on the LCD and the OLED, each of the LCD and the OLED includes a display area and a non-display area surrounding the display area, the display area includes a plurality of rows and columns of sub-pixel units and a plurality of scan lines, each of which connects one row of sub-pixel units. The non-display area comprises a grid driving circuit, and the grid driving circuit is used for generating scanning signals and transmitting the scanning signals to scanning lines so as to control the sub-pixel units in the display area to be lightened line by line. However, the scanning signal generated by the gate driving circuit has a fixed frequency, and therefore, the scanning signal may generate electromagnetic interference, which may interfere with normal operations of other peripheral electronic devices after being radiated from the display panel.
Disclosure of Invention
The invention provides a driving method, a driving device and a display device of a display panel, which are used for reducing electromagnetic interference radiated to the periphery by the display panel so as to reduce the electromagnetic interference of the display panel to other peripheral electronic products.
In a first aspect, an embodiment of the present invention provides a driving method for a display panel, where the display panel includes scan lines and data lines, where the scan lines and the data lines intersect to define a plurality of rows and columns of sub-pixel regions, and the sub-pixel regions are provided with sub-pixel units; the driving method comprises the following steps:
acquiring an image to be displayed;
providing display signals to the sub-pixel units by using the scanning lines and the data lines according to an image to be displayed;
displaying an image to be displayed according to the display signal;
the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different.
In a second aspect, an embodiment of the present invention further provides a driving apparatus for a display panel, the driving apparatus being configured to perform any one of the driving methods provided in the first aspect, the driving apparatus comprising:
the image acquisition module is used for acquiring an image to be displayed;
the signal providing module is used for providing display signals to the sub-pixels by utilizing the scanning lines and the data lines according to an image to be displayed;
the image display module is used for displaying an image to be displayed according to the display signal;
the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different.
In a third aspect, the embodiment of the present invention further provides a display device, which includes the driving device of the display panel provided in the second aspect.
In the driving method of the display panel provided by the embodiment of the invention, the periods of the scanning pulse signals sent to the same row of sub-pixel units in at least two frames of display pictures are different, so that the periods of the scanning pulse signals of the same row of sub-pixel units in a plurality of frames of pictures to be displayed are not completely the same, that is, the natural frequency characteristic of the scanning pulse signals is damaged, the electromagnetic interference phenomenon caused by the fixed frequency of the scanning pulse signals can be further weakened, that is, the electromagnetic interference generated by the scanning pulse signals is improved, the problem that the interference energy radiates to the periphery to cause interference on other electronic products is avoided, the improvement of the performance of other electronic products on the periphery of the display panel is facilitated, that is, the normal operation of the electronic products on the periphery of the display panel is facilitated.
Drawings
FIG. 1 is a diagram illustrating the effect of EMI generated by a display panel in the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a driving method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a driving sequence according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another driving timing sequence provided by the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a gate driving circuit according to an embodiment of the present invention;
FIG. 7 is a circuit diagram of a shift register according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a driving sequence according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of another driving timing sequence provided by the embodiment of the present invention;
FIG. 10 is a schematic diagram of another driving sequence provided by the embodiment of the present invention;
FIG. 11 is a schematic diagram of a driving sequence according to another embodiment of the present invention;
fig. 12 is a schematic structural diagram of another gate driving circuit according to an embodiment of the invention;
FIG. 13 is a schematic diagram of a driving sequence according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of another gate driving circuit according to an embodiment of the invention;
FIG. 15 is a schematic diagram of a driving sequence according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present invention;
fig. 17 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.
The display panel comprises a display area and a non-display area, wherein in the display area, a plurality of scanning lines and a plurality of data lines are crossed with each other to limit a plurality of sub-pixel areas, each sub-pixel area is internally provided with a sub-pixel unit, in the non-display area, a grid driving circuit is arranged and comprises a plurality of cascaded shift registers, wherein a secondary trigger signal output end of a previous shift register in two adjacent stages of shift registers is electrically connected with a trigger signal input end of a next shift register, and an output end of each stage of shift register is connected with one scanning line to drive each scanning line one by one, so that data signals can be transmitted to each sub-pixel unit in the display panel line by line through the data lines. Exemplary fig. 1 is a schematic diagram of electromagnetic interference effects generated by a display panel in the prior art. Referring to fig. 1, in the related art, a scan signal is scanned one level at a time in a progressive (also referred to as "progressive") scanning manner, and each data line writes a data signal to a sub-pixel unit of a current row during a scan signal enable period of a current level. The time interval between the scanning end time of the sub-pixel unit in the current row and the scanning end time of the sub-pixel unit in the next row can be referred to as a period Tg of the scanning signal, and the scanning frequency corresponding to the row is fg, where fg equals 1/Tg; because the scanning frequency of each row of sub-pixel units in each frame is fixedgAnd therefore, energy peaks occur at a plurality of fixed frequency positions of the low frequency band of the vehicle gauge, namely the energy peaks occur periodically, and larger energy at the energy peaks radiates outwards, which easily causes that other electronic products cannot work normally. For example, the EMI test result is shown in fig. 1, wherein the abscissa X represents frequency in hertz (Hz), and the ordinate Y represents intensity of radiation energy, which can be understood as DB value (i.e. count value) in absolute units (a.u.), that is, the EMI test result is obtained by pure counting method; wherein, L011 and L012 respectively represent the average value and the maximum value of the same specification requirement limit value of the vehicle, and L021 and L022 respectively represent the average value curve and the maximum value curve of the EMI radiation energy at different frequencies obtained by testing. As can be seen from fig. 1, energy peaks occur at positions at which the scanning frequency is multiplied. Thus, the energy at the energy peak is radiated to the periphery of the display panel, which may affect the normal operation of other electronic products around the display panel.
In view of this, embodiments of the present invention provide a driving method and a driving apparatus for a display panel, and a display apparatus. The display panel comprises scanning lines and data lines, wherein the scanning lines and the data lines are crossed to define a plurality of rows and columns of sub-pixel regions, and sub-pixel units are arranged in the sub-pixel regions; the driving method comprises the following steps:
acquiring an image to be displayed;
providing display signals to the sub-pixel units by using the scanning lines and the data lines according to an image to be displayed;
displaying an image to be displayed according to the display signal;
the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Exemplarily, referring to fig. 2, the display panel includes a display area AA and a non-display area DA surrounding the display area AA; the display panel comprises a scanning line Scan and a Data line Data, wherein the scanning line Scan and the Data line Data are arranged in a crossed mode to define a plurality of sub-pixel unit areas PZ, and each sub-pixel unit area PZ is provided with a sub-pixel unit P.
The display area AA of the display panel is used for displaying an image to be displayed.
For example, the display panel may be an LCD panel, an OLED display panel, or other types of display panels known to those skilled in the art, and the embodiment of the invention is not limited thereto.
The non-display area DA of the display panel is used for disposing a gate driving circuit, a source driving circuit, an anti-static circuit, an integrated circuit, and other circuit structures, optical structures, or supporting and fixing structures known to those skilled in the art, which is not limited in the embodiment of the present invention.
Exemplarily, only the sub-pixel unit P and the sub-pixel unit region PZ are exemplarily illustrated in a rectangular shape in fig. 2. In the actual product structure of the display panel, the shapes of the sub-pixel units P and the sub-pixel unit areas PZ can be set according to the wiring manner of the display panel and other requirements, which is not limited in the embodiment of the present invention.
It should be noted that fig. 2 only shows that the Scan lines Scan and the Data lines Data extend from the display area AA to the non-display area DA, for example. In other embodiments, the lengths of the Scan lines Scan and the Data lines Data and the relative position relationship between the Scan lines Scan and the Data lines Data and the boundary of the display area AA may also be set according to actual requirements of the display panel, which is not limited in this embodiment of the present invention.
Based on the structure of the display panel, fig. 3 is a schematic flow chart of a driving method according to an embodiment of the present invention, and referring to fig. 3, the driving method of the display panel includes:
and S110, acquiring an image to be displayed.
For example, the image to be displayed may be a static image or a dynamic scene image, which is not limited in this application.
And S120, providing a display signal to the sub-pixel unit by using the scanning line and the data line according to the image to be displayed.
Specifically, the display signal includes a scan pulse signal (also referred to as a scan signal) and a data signal; the effective width of the scan pulse signal determines the duration of time that the sub-pixel unit can be written with the data signal, and the magnitude of the data signal determines the display gray scale (which can be understood as the display brightness) of the sub-pixel unit. The gate driving circuit can provide scanning pulse signals to the sub-pixel units row by row through the scanning lines to start the sub-pixel units in the corresponding row, and the source driving circuit can provide data signals to the started sub-pixel units by the data lines.
Specifically, a frame of to-be-displayed picture is refreshed correspondingly in one frame of scanning period, a static image can be displayed when data signals corresponding to each frame of to-be-displayed picture are the same, and a dynamic scene image can be displayed when data signals corresponding to the ith to (i + n +1) th frames of to-be-displayed pictures are the same and the data signals corresponding to the ith frame and the (i + n +1) th frames of to-be-displayed pictures are different. In a frame scanning period, the scanning lines Scan arranged row by row can load scanning pulse signals to the sub-pixel units P of the corresponding row step by step, and at the moment, Data signals are written into each sub-pixel unit P of the row by the Data lines Data; the process of completing the writing of the data signals from the first row of sub-pixel units P to the last row of sub-pixel units P correspondingly refreshes a complete picture.
For example, fig. 4 is a schematic diagram of a driving timing sequence provided by an embodiment of the invention. Referring to fig. 2 and 4, the display signals include Scan pulse signals (which may also be referred to as Scan signals, and are respectively shown as Gate1, Gate2, Gate3, and Gate4 in fig. 4) and Data signals (not shown in fig. 4), and in one frame Scan period, the Scan pulse signals are sequentially loaded to all Scan lines Scan, and the corresponding Data signals are sequentially loaded to the Data lines Data; each scanning pulse signal correspondingly triggers one row of sub-pixel units P, and the scanning pulse signal of Gate1 correspondingly triggers the first row of sub-pixel units P for example; the scan pulse signal of Gate2 triggers the second row of sub-pixel units P correspondingly, and so on, which is not described again.
In at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different, and in a normal charging mode, the period refers to the interval of the initial scanning time of the sub-pixel units in two adjacent rows. Illustratively, as shown in fig. 4, in the picture to be displayed in the first frame, the period of the scan pulse signal sent to the sub-pixel unit of the j-th row (j may be 1, 2, 3 or 4) is TG1, and in the picture to be displayed in the second frame, the period of the scan pulse signal sent to the sub-pixel unit of the first row is TG2, and TG1 is not equal to TG 2. In this way, the period of the scan pulse scan signal can be made variable, rather than a fixed value.
For convenience of drawing, fig. 4 only shows, by way of example, that the periods of the scan pulse signals sent to the sub-pixel units in the same row are different in two adjacent frames of the to-be-displayed picture, but the present application is not limited thereto. The person skilled in the art can flexibly set the period condition of the scan pulse signal sent to the same row of sub-pixel units in multiple frames of the picture to be displayed according to practical situations, for example: in a multi-frame to-be-displayed picture, three periods (or the number of types set by a person skilled in the art according to the actual situation) of the scan pulse signals sent to the sub-pixel units in the same row are TG1, TG2 and TG3, respectively, and from the first frame to-be-displayed picture, the appearance sequence of TG1, TG2 and TG3 may include, as time goes by:
TG1, TG2, TG 3; TG1, TG2, TG 3; TG1, TG2, TG 3; … …, or alternatively,
TG1, TG1, TG2, TG2, TG3, TG 3; TG1, TG1, TG2, TG2, TG3, TG 3; … …, or;
TG1, TG2, TG2, TG3, TG3, TG 3; TG1, TG2, TG2, TG3, TG3, TG 3; … …, or in other sequences as would be appreciated by those skilled in the art.
It should be noted that fig. 4 only shows, by way of example, that the periods of the scan pulse signals sent to the sub-pixel units in each row in the same frame of the to-be-displayed picture are the same, but the present application is not limited thereto, and the following description will be made in detail in conjunction with the gate driving circuit for the case where the periods of the scan pulse signals sent to the sub-pixel units in each row in the same frame of the to-be-displayed picture, and no description will be made here.
By setting at least two frames of pictures to be displayed and different periods of scanning pulse signals sent to the same row of sub-pixel units, the periods of the scanning pulse signals of the same row of sub-pixel units in the multiple frames of pictures to be displayed are not completely the same, so that the inherent periodic characteristics (also called inherent frequency characteristics) of the scanning pulse signals are destroyed, the electromagnetic interference phenomenon caused by the fixed scanning period of the scanning pulse signals can be weakened, and the problem that the electromagnetic interference generated by the scanning signals is radiated to the periphery to cause electromagnetic interference on other peripheral electronic products is solved; when the display device is applied to vehicle-mounted display, the performance of other electronic products around the display panel can be improved, and normal operation of other electronic products around the display panel can be realized.
And S130, displaying the image to be displayed according to the display signal.
In a frame scanning period, each sub-pixel unit in the display panel can realize the refreshing of a complete image to be displayed after receiving a display signal.
In the driving method of the display panel provided by the embodiment of the invention, by setting the at least two frames of pictures to be displayed and the different periods of the scanning pulse signals sent to the same row of sub-pixel units, the periods of the scanning pulse signals of the same row of sub-pixel units in the multiple frames of pictures to be displayed are not completely the same, so that the radiation energy can be dispersed at more frequency positions, the energy value at the frequency doubling position is reduced, the electromagnetic interference is improved, and the electronic products around the display device can work normally.
The adjustment manner of the period of the scan pulse signal can be flexibly set according to the display panel and the driving method thereof, and is exemplarily described below with reference to fig. 4 and 5.
With reference to fig. 4, optionally, in at least two frames of to-be-displayed pictures, the pulse widths of the scanning pulse signals sent to the sub-pixel units in the same row are different; wherein, the pulse width refers to the continuous scanning time of the sub-pixel unit of the current row.
Fig. 5 is a schematic diagram of another driving timing sequence provided in the embodiment of the invention. Referring to fig. 5, optionally, in at least two frames of to-be-displayed pictures, the scanning gaps of the scanning pulse signals sent to the sub-pixel units in the same row are different; the scanning interval refers to an interval between a scanning end time of a current row of sub-pixel units and a scanning start time of a next row of sub-pixel units.
Specifically, in general, there are two charging modes for the sub-pixel unit, namely a normal charging mode and a pre-charging mode. The normal charging mode refers to that the sub-pixel units in the next row are charged after the sub-pixel units in the current row are charged, and a time interval is formed between the charging ending time of the sub-pixel units in the current row and the charging starting time of the sub-pixel units in the next row. Correspondingly, the scanning pulse signals output by the gate driving circuit to the sub-pixel units of each row have the following characteristics: the time periods corresponding to the scanning pulse signals of two adjacent rows of sub-pixel units are not overlapped, and there is a time interval between the ending time of the scanning pulse signal of the sub-pixel unit in the current row and the starting time of the scanning pulse signal of the sub-pixel unit in the next row, as shown in fig. 4 and 5. In the normal charging mode, the period of the scan pulse signal may be considered to be formed by two parts, namely, the pulse width and the scan gap, and therefore, there are three specific implementation manners for implementing that the periods of the scan pulse signals sent to the sub-pixel units in the same row are different in at least two frames of the to-be-displayed picture:
the first method is as follows: in at least two frames of pictures to be displayed, the pulse widths of the scan pulse signals sent to the sub-pixel units in the same row are different, and the scan gaps are the same, for example, as shown in fig. 4, in a first frame of pictures to be displayed, the pulse width of the scan pulse signal received by each sub-pixel unit in each row is W1, the scan gap is Δ TG1, and the period is TG 1; in the second frame of the to-be-displayed picture, the pulse width of the scanning pulse signal received by each row of the sub-pixel units is W2, the scanning gap is Δ TG2, and the period is TG 2. W1 < W2, while Δ TG1 ═ Δ TG2, thus TG1 < TG 2;
the second method comprises the following steps: in at least two frames of pictures to be displayed, the pulse widths of the scanning pulse signals sent to the sub-pixel units in the same row are the same, and the scanning gaps are different, illustratively, as shown in fig. 5, W1 is W2, meanwhile, Δ TG1 is less than Δ TG2, so TG1 is less than TG 2;
the third method comprises the following steps: in at least two frames of pictures to be displayed, the pulse widths of scanning pulse signals sent to the same row of sub-pixel units are different, and the scanning gaps are also different.
It can be understood that, a person skilled in the art may select an adjustment manner of the period of the scan pulse signal according to an actual situation, and preferably, the period of the scan pulse signal is adjusted by using the second adjustment manner, so that it is possible to implement that, in at least two frames of pictures to be displayed, the periods of the scan pulse signals sent to the same row of sub-pixel units are different, and it is also possible to ensure that the charging time of the row of sub-pixel units in each frame of the pictures to be displayed is the same, which is beneficial to improving the display quality.
On the basis of the above technical solution, as described above, the periods of the scanning pulse signals of each row of the sub-pixel units in the same frame of the to-be-displayed picture may be the same or different, and the following description will be given by taking the gate driving circuit into account.
First, optionally, in the same frame of the to-be-displayed picture, the periods of the scan pulse signals sent to each row of the sub-pixel units are the same.
Fig. 6 is a schematic structural diagram of a gate driving circuit according to an embodiment of the present invention. Referring to fig. 6, the Gate driving circuit includes a plurality of cascaded shift registers VSR, each of which includes a LATCH, a NAND operator NAND, and a BUFFER, and each of the cascaded shift registers VSR may generate a scan pulse signal (shown in fig. 6 as Gate1, Gate2, Gate3, and Gate4, respectively) according to a first clock signal supplied from a first clock signal line and a second clock signal supplied from a second clock signal line. Fig. 7 is a circuit diagram of a shift register VSR according to an exemplary embodiment of the present invention. Referring to fig. 7, the LATCH includes two clock inverters and two inverters; the NAND operator NAND comprises a NAND gate; the BUFFER includes three inverters. The LATCH works according to the following principle: when the first clock signal (the clock terminal of the LATCH is electrically connected to the first clock signal line as exemplarily shown in fig. 7) is in a high state, the LATCH is in a transmission state, that is, the signal output from the output terminal of the LATCH is the same as the signal input from the input terminal of the LATCH; when the first clock signal is in a low state, the LATCH is in a latched state, i.e., the output terminal of the LATCH will continuously output the signal that the LATCH transmitted in the transmitting state. The NAND operator NAND can NAND signals inputted from its two input terminals. The BUFFER can stabilize the voltage of the signal inputted at the input terminal, and since the number of inverters in the BUFFER shown in fig. 7 is odd, the BUFFER can also invert the signal inputted at the input terminal.
Specifically, for the gate driving circuit shown in fig. 6, the normal charging mode and the pre-charging mode may be implemented by controlling the first clock signal and the second clock signal. In the pre-charging mode, the scanning pulse signal output by the gate driving circuit to each row of sub-pixel units has the following characteristics: the time sections corresponding to the scanning pulse signals of two adjacent rows of sub-pixel units are partially overlapped. Accordingly, the charging to each row of sub-pixel cells is as follows: inputting data signals of sub-pixel units in a current row to the sub-pixel units in the current row and the sub-pixel units in the next row within the overlapping time of scanning pulse signals of the sub-pixel units in the current row and the sub-pixel units in the next row; and inputting the data signals of the sub-pixel units of the next row in the time when the scanning pulse signals of the sub-pixel units of the next row do not overlap with the scanning pulse signals of the sub-pixel units of the current row. The charging condition of the sub-pixel units in the first row is as follows, and data signals of the sub-pixel units in the first row are input to the sub-pixel units in the first row and the second row within the overlapping time of scanning pulse signals of the sub-pixel units in the first row and the second row; and in the time when the scanning pulse signals of the first row and the second row of the sub-pixel units are not overlapped, the data signals are not input into the sub-pixel units of the first row. In the precharge mode, the period of the scan pulse signal is the same as the pulse width of the scan pulse signal, and both are the duration of the scan pulse signal.
It can be seen that, in various schemes of "different periods of the scan pulse signals sent to the same row of the sub-pixel units in at least two frames of the to-be-displayed pictures", the charging modes can be divided into two types according to whether the charging modes of the to-be-displayed pictures are the same: the first method is as follows: the charging modes of the frames of pictures to be displayed are the same, and the charging modes of the frames of pictures to be displayed are normal charging modes; the second method comprises the following steps: the charging modes of the frames of pictures to be displayed are the same, and the charging modes of the frames of pictures to be displayed are all pre-charging modes; the third method comprises the following steps: the charging mode of the picture to be displayed in each frame is different.
For the first mode, the following will exemplify "the charging modes of the frames to be displayed are all the normal charging modes" with reference to fig. 8 to 10.
Specifically, in at least two frames of pictures to be displayed, the pulse width of the scan pulse signal can be adjusted by adjusting the clock pulse widths of the first clock signal and the second clock signal, so as to adjust the period of the scan pulse signal. Fig. 8 is a schematic diagram of a driving timing sequence provided by an embodiment of the present invention, and referring to fig. 6 to fig. 8, in a picture to be displayed in a first frame, clock pulse widths of a first clock signal and a second clock signal are both W1, and a time interval between an i-th pulse (i is an integer greater than or equal to 1) in the first clock signal and an i-th pulse in the second clock signal is Δ TG1, so that a pulse width of a scan pulse signal is W1, a scan gap is Δ TG1, and a period is TG1 — W1 +/Δ TG 1; in the second frame to-be-displayed picture, the clock pulse widths of the first clock signal and the second clock signal are both W2, W2 > W1, the time interval between the ith (i is an integer greater than or equal to 1) pulse in the first clock signal and the ith pulse in the second clock signal is Δ TG2, Δ TG2 is Δ TG1, so that the pulse width of the scanning pulse signal is W2, the scanning gap is Δ TG2 is Δ TG1, and TG2 is W2 plus Δ TG1, thereby realizing that the periods of the scanning pulse signals of any row of sub-pixel units in the first frame display picture and the second frame display picture are different. It is understood that fig. 8 only shows W2 > W1 by way of example, but not limitation of the present application, for example, W1 > W2 may also be provided.
Specifically, in at least two frames of pictures to be displayed, the scanning interval of the scanning pulse signal can be adjusted by adjusting the time interval between the ith pulse in the first clock signal and the ith pulse in the second clock signal, so as to adjust the period of the scanning pulse signal. Exemplarily, fig. 9 is another schematic diagram of driving timing provided by the embodiment of the present invention, referring to fig. 6, fig. 7 and fig. 9, in the first frame to be displayed, the pulse width of the scan pulse signal is W1, the scan gap is Δ TG1, and the period is TG1 — W1 +/Δ TG 1; in the second frame to be displayed picture, the pulse width of the scanning pulse signal is W2 ═ W1, the scanning gap is Δ TG2, >, Δ TG2 >, Δ TG2, and TG2 ═ W1 +/Δ TG2, so that the periods of the scanning pulse signals of any row of sub-pixel units in the first frame display picture and the second frame display picture are different. It is understood that fig. 9 only shows Δ TG2 > - Δ TG1 by way of example, but the present application is not limited thereto, and Δ TG1 > - Δ TG2 may be further provided, for example.
It can be understood that the pulse widths of the scanning pulse signals sent to the sub-pixel units in the same row are the same, and the scanning gaps are different, so that the periods of the scanning pulse signals sent to the sub-pixel units in the same row are different in at least two frames of pictures to be displayed, the charging time of the sub-pixel units in the row in each frame of the pictures to be displayed can be ensured to be the same, and the display quality can be improved.
Specifically, in at least two frames of pictures to be displayed, the clock pulse widths of the first clock signal and the second clock signal may be adjusted to adjust the pulse width of the scan pulse signal, and at the same time, the time interval between the starting time of the ith pulse width in the first clock signal and the starting time of the ith pulse width in the second clock signal is adjusted to adjust the scan gap of the scan pulse signal, so as to adjust the period of the scan pulse signal. Exemplarily, fig. 10 is a schematic diagram of still another driving timing sequence provided by the embodiment of the present invention, referring to fig. 6, fig. 7 and fig. 10, in the first frame to be displayed, the pulse width of the scan pulse signal is W1, the scan gap is Δ TG1, and the period is TG1 — W1+ Δ TG 1; in the picture to be displayed in the second frame, the pulse width of the scanning pulse signal is W2, W2 > W1, the scanning gap is Δ TG2, Δ TG2 > - Δ TG1, and TG2 is W2 +/Δ TG2, so that the periods of the scanning pulse signals of any row of sub-pixel units in the first frame display picture and the second frame display picture are different. It is understood that fig. 10 shows W2 > W1, Δ TG2 > - Δ TG1 by way of example only, but without limiting the application, for example, W2 > W1, Δ TG2 < Δtg1(W2-W1 ≠ Δ TG1- Δ TG2) may also be provided; alternatively, W2 > W1,. DELTA.TG 2 >. DELTA.TG 1(W2-W1 ≠ DELTA.TG 2-DELTA.TG 1); or W2 < W1, Δ TG2 < ΔTG 1.
It should be noted that, for convenience of drawing, only two frames of to-be-displayed pictures are shown in fig. 8-10, and the periods of the scan pulse signals in the first frame of to-be-displayed picture and the second frame of to-be-displayed picture are different, but the present application is not limited thereto, and a person skilled in the art can flexibly set the period of the scan pulse signal in each frame of to-be-displayed picture according to actual situations.
As for the second mode, specifically, in the precharge mode, the period of the scan pulse signal is equal to the pulse width of the scan pulse signal, and the width of the scan pulse signal is equal to the pulse width of the first clock signal (the pulse width of the second clock signal is equal to the width of the first clock signal). Therefore, if it is desired to realize that the periods of the scan pulse signals sent to the same row of sub-pixel units are different in at least two frames of the to-be-displayed pictures, it is only necessary to set the clock pulse widths of the first clock signals to be different in the at least two frames of the to-be-displayed pictures, and details are not repeated here.
For the third mode, the following description will be made by way of example with reference to fig. 11.
For example, fig. 11 is a schematic diagram of another driving timing sequence provided by the embodiment of the invention. Referring to fig. 6, 7 and 11, in the first frame to be displayed, the charging mode is a normal charging mode, the clock pulse widths of the first clock signal and the second clock signal are both W1, and the time interval between the ith (i is an integer greater than or equal to 1) pulse in the first clock signal and the ith pulse in the second clock signal is Δ TG1, so that the pulse width of the scan pulse signal is W1, the scan gap is Δ TG1, and the period is TG1 is W1 +/Δ TG 1; in the second frame to be displayed picture, the charging mode is a pre-charging mode, the clock pulse widths of the first clock signal and the second clock signal are both W2, W2 > TG1, so that the period and the pulse width of the scanning pulse signal are both W2, and therefore the period of the scanning pulse signal of any row of sub-pixel units in the first frame display picture and the second frame display picture is different. It is understood that fig. 11 only shows W2 > TG1 by way of example, but not limitation of the present application, for example, TG1 > W2 may also be provided.
It can be understood that the period of the scan pulse signal in the normal charging mode is greatly different from the period of the scan pulse signal in the pre-charging mode, so that the radiation energy can be dispersed in a plurality of frequency positions, and the frequency interval between two adjacent frequency positions is large, which is beneficial to reducing the electromagnetic interference.
It should be noted that, for convenience of drawing, only two frames of to-be-displayed frames are shown in fig. 11, the charging modes in the first frame of to-be-displayed frame and the second frame of to-be-displayed frame are different, and the periods of the scan pulse signals in the different charging modes are different, but the present application is not limited thereto, and those skilled in the art can set the charging modes according to actual situations. For example, the method can be set in multiple frames of to-be-displayed pictures, wherein part of the frames of to-be-displayed pictures adopt a normal charging mode and include at least two periods, and part of the frames of to-be-displayed pictures adopt a pre-charging mode and include one period; or, the method can also be set in multiple frames of pictures to be displayed, wherein part of the frames of pictures to be displayed all adopt a normal charging mode and include a period, and part of the frames of pictures to be displayed all adopt a pre-charging mode and include at least two periods; or, the method can also be set in multiple frames of pictures to be displayed, wherein part of the frames of pictures to be displayed all adopt a normal charging mode and have at least two periods, and part of the frames of pictures to be displayed all adopt a pre-charging mode and include at least two periods.
Optionally, a time period corresponding to the scan pulse signal of the sub-pixel unit in the current row partially overlaps a time period corresponding to the scan pulse signal of the sub-pixel unit in the next row, a width of the overlapping portion is t2, a width of the non-overlapping portion is t3, and t2 is t 3.
With continued reference to fig. 11, optionally, W1 ═ t 2. Therefore, the fixed frequency of the scanning pulse signal is disturbed, and meanwhile, the charging time of the sub-pixel units in each frame of image to be displayed is the same, which is beneficial to improving the quality of the display picture.
It should be noted that, for the case of "the periods of the scan pulse signals sent to at least two rows of the sub-pixel units in the same frame of the to-be-displayed picture are the same", the first clock signal and the second clock signal provided by the display driving apparatus to the gate driving circuit are fixed and invariant at least within one frame of the scan period, that is, the change frequency of the second clock signal of the first clock signal is smaller than the frame scan frequency. Because the change frequency is small, the load of the display driving device is small, and the resources of the display driving device are not excessively occupied.
Next, optionally, in the same frame of the to-be-displayed picture, the periods of the scan pulse signals sent to the sub-pixel units of at least two rows are different. The arrangement has the advantages that the inherent frequency characteristic of the scanning pulse signal can be further disturbed, so that the radiation energy can be further dispersed at more frequency positions, the energy value at the frequency doubling position is reduced, the electromagnetic interference is improved to a greater extent, and the normal work of electronic products around the display device can be realized.
Specifically, in various schemes for implementing that periods of scanning pulse signals sent to at least two rows of sub-pixel units in the same frame of picture to be displayed are different, three charging modes can be adopted according to whether the charging modes of the sub-pixel units in each row are the same: the first method is as follows: the charging modes of the sub-pixel units in each row are the same, and the charging modes of the sub-pixel units in each row are normal charging modes; the second method comprises the following steps: the charging modes of the sub-pixel units in each row are the same, and the charging modes of the sub-pixel units in each row are all pre-charging modes; the third method comprises the following steps: the charging mode for each row of sub-pixel units is different.
For the first mode, optionally, the scanning end time of the sub-pixel unit in the current row is earlier than the scanning start time of the sub-pixel unit in the next row. That is, in the same frame, the charging mode for each row of sub-pixel units is the normal charging mode, which is advantageous in that the period of the scan pulse signal sent to each row of sub-pixel units can be arbitrarily adjusted.
For example, in the same frame of the to-be-displayed picture, the periods of the scanning pulse signals of each row of sub-pixel units are two, TG1 and TG2, respectively, and the sequence of the appearance of TG1 and TG2 from the first row of sub-pixels to the last row of sub-pixels may include:
TG1、TG2；TG1、TG2；TG1、TG2……
alternatively, TG1, TG1, TG1, TG2, TG2, TG 2; TG1, TG1, TG1, TG2, TG2, TG2 … …
Alternatively, other sequences will be apparent to those skilled in the art and are not intended to be limiting herein.
Further, optionally, in the same frame of the to-be-displayed picture, the periods of the scanning pulse signals sent to the two adjacent rows of sub-pixel units are different. The advantage of this arrangement is that the period of the scan pulse signal varies more frequently between lines in the same frame of the picture to be displayed, and the greater the degree of disturbing the natural frequency of the scan pulse signal.
As for the first mode, there are various specific implementations, and the following description will be made by way of example with reference to fig. 12 and 13.
For example, fig. 12 is a schematic structural diagram of another gate driving circuit provided in the embodiment of the present invention. Referring to fig. 12, the gate driving circuit includes a plurality of cascaded first shift registers VSR1 and a plurality of cascaded second shift registers VSR2, the first shift registers VSR1 transmit scan pulse signals to odd-numbered row sub-pixel units through scan lines, and the second shift registers VSR2 transmit scan pulse signals to even-numbered row sub-pixel units through scan lines. The first shift register VSR1 and the second shift register VSR2 each include a LATCH, a NAND operator NAND, and a BUFFER, and the first shift register VSR1 each generates a scan pulse signal (shown in fig. 12 as Gate1 and Gate3, respectively) from a first clock signal supplied from a first clock signal line and a second clock signal supplied from a second clock signal line; the second shift registers VSR2 may each generate a scan pulse signal (shown as Gate2 and Gate4, respectively, in fig. 12) according to a third clock signal supplied from a third clock signal line and a fourth clock signal supplied from a fourth clock signal line.
Illustratively, fig. 13 is a schematic diagram of a driving timing sequence provided by an embodiment of the present invention, referring to fig. 12 and 13, in a picture to be displayed in a first frame, clock pulse widths of a first clock signal and a second clock signal are both W1, clock pulse widths of a third clock signal and a fourth clock signal are both W2, W2 > W1, a time interval between an i-th (i is an integer greater than or equal to 1) pulse in the second clock signal and an i-th pulse in the fourth clock signal is Δ TG1, a time interval between an i-th pulse in the fourth clock signal and an i + 1-th pulse in the first clock signal is Δ TG2, a time interval between an i-th pulse in the first clock signal and an i-th pulse in the third clock signal is Δ TG1, a time interval between an i-th pulse in the third clock signal and an i + 1-th pulse in the second clock signal is Δ TG2, Δ TG2 > - Δ TG1, so that the pulse width of the scan pulse signal output by the first shift register VSR1 is W1, the scan gap is Δ TG1, and the period is TG1 ═ W1 +/Δ TG 1; the pulse width of the scanning pulse signal output by the second shift register VSR2 is W2, the scanning gap is Δ TG2, and the period is TG2 — W2+ Δtg 2; in a picture to be displayed in a 1+ n (n is a non-negative integer) th frame, the pulse width of a scanning pulse signal output by the first shift register VSR1 is W3, the scanning gap is Δ TG3, and the period is TG3 ═ W3+ Δtg 3; the pulse width of the scan pulse signal output from the second shift register VSR2 is W4, the scan gap is Δ TG4, and the period is TG4 ═ W4 +/Δ TG4, where W4 > W3, Δ TG4 > - Δ TG3, W3 > W1, Δ TG3 > - Δ TG1, W4 > W2, Δ TG4 > - Δ TG 4.
It can be understood that, compared with the clock signals provided to the first shift register VSR1 and the second shift register VSR2 by time-sharing through the first clock signal line and the second clock signal line, the third clock signal and the fourth clock signal are provided to the second shift register VSR2 through the addition of the third clock signal line and the fourth clock signal line, so that the load on the display driving apparatus can be reduced, and the resource occupation of the display driving apparatus can be avoided.
As to the second mode, optionally, in a frame of the to-be-displayed image, the charging modes for each row of sub-pixel units are all the pre-charging modes, and the periods of the scanning pulse signals of each row of sub-pixel units at least include two. Illustratively, there are N1 rows of sub-pixel units, the time period corresponding to the scan pulse signal of the sub-pixel unit of the current row partially overlaps with the time period corresponding to the scan pulse signal of the sub-pixel unit of the next row, and the width of the overlapping part is t21, and the width of the non-overlapping part is t 31; there are N2 rows of sub-pixel units, the time period corresponding to the scan pulse signal of the sub-pixel unit of the current row partially overlaps with the time period corresponding to the scan pulse signal of the sub-pixel unit of the next row, and the width of the overlapping part is t22, the width of the non-overlapping part is t32, t21+ t31 ≠ t22+ t 32; n1 and N2 are each an integer of 2 or more. The specific implementation of the second mode is similar to that of the first mode, and is not described herein again.
For the third mode, optionally, there are M rows of sub-pixel units, the scanning end time of the sub-pixel unit in the current row is earlier than the scanning start time of the sub-pixel unit in the next row, the pulse width of the scanning pulse signal is W1, and the period of the scanning pulse signal is T1; m is an integer greater than or equal to 1;
the method comprises the following steps that N rows of sub-pixel units exist, a time period corresponding to a scanning pulse signal of the sub-pixel unit in the current row partially overlaps a time period corresponding to a scanning pulse signal of the sub-pixel unit in the next row, the width of an overlapped part is T2, the width of a non-overlapped part is T3, and T2+ T3 is not equal to T1; n is an integer greater than or equal to 2;
inputting data signals of sub-pixel units of a current row to the sub-pixel units of the current row and the sub-pixel units of the next row within the overlapping time of scanning pulse signals of the sub-pixel units of the current row and the sub-pixel units of the next row; and inputting the data signals of the sub-pixel units of the next row in the time when the scanning pulse signals of the sub-pixel units of the next row do not overlap with the scanning pulse signals of the sub-pixel units of the current row.
Specifically, in the same frame, the mode for charging a part of the row sub-pixel units is the normal charging mode, and the mode for charging a part of the row sub-pixel units is the pre-charging mode. The period of the scan pulse signal of the M rows of sub-pixel units in the normal charging mode includes one or more, and exemplarily, the period of the scan pulse signal of the M rows of sub-pixel units includes one, which is TG 1; the period of the scan pulse signal of the N rows of sub-pixel units in the precharge mode also includes one or more, and exemplarily, the period of the scan pulse signal of the N rows of sub-pixel units includes one, which is TG 2. For example, the order of appearance of TG1 and TG2 from the first row of subpixels to the last row of subpixels may include:
TG1、TG2、TG2；TG1、TG2、TG2；TG1、TG2、TG2……
alternatively, TG1, TG1, TG2, TG 2; TG1, TG1, TG2, TG2 … …
Alternatively, other sequences will be apparent to those skilled in the art and are not intended to be limiting herein.
Alternatively, t2 is t 3. Therefore, the charging time of each row of sub-pixel units in the pre-charging mode can be the same, and the display picture quality is favorably improved.
Alternatively, W1 ═ t 2. Therefore, when the fixed frequency of the scanning pulse signal is disturbed, the charging time of each row of sub-pixel units in the same frame of display picture can be the same, which is beneficial to improving the quality of the display picture.
For example, fig. 14 is a schematic structural diagram of another gate driving circuit provided in the embodiment of the present invention. Referring to fig. 14, the Gate driving circuit includes a plurality of normal to precharge auxiliary units NTP, a plurality of precharge to normal auxiliary units PTN, and a plurality of cascaded shift registers VSR, each of which includes a LATCH, a NAND operator NAND, and a BUFFER, and each of the 3 × m1+1 stage shift registers VSR (m1 is an integer of 0 or more) may generate a scan pulse signal (shown as Gate1 and Gate4, respectively, in fig. 12) according to a first clock signal provided from a first clock signal line and a second clock signal provided from a second clock signal line; each of the 3 × m1+2 th and 3 × m1+3 th shift registers VSR may generate a scan pulse signal (shown as Gate3 and Gate4, respectively, in fig. 12) according to the third clock signal supplied from the third clock signal line and the fourth clock signal supplied from the fourth clock signal line. The first input end of the normal rotation pre-charging auxiliary unit NTP is electrically connected with the output end of the LATCH LATCH in the 3 Xm 1+ 1-stage shift register VSR, the second input end of the normal rotation pre-charging auxiliary unit NTP is electrically connected with the fifth clock signal line of the display panel, and the output end of the normal rotation pre-charging auxiliary unit NTP is electrically connected with the clock end of the LATCH LATCH in the 3 Xm 1+ 2-stage shift register VSR. A first input terminal of the pre-charge normal auxiliary unit PTN is electrically connected to an output terminal of the LATCH in the shift register VSR of the 3 × m1+3 th stage, a second input terminal of the pre-charge normal auxiliary unit PTN is electrically connected to a fifth clock signal line of the display panel, and an output terminal of the pre-charge normal auxiliary unit PTN is electrically connected to a clock terminal of the LATCH in the shift register VSR of the 3 × (m1+1) +1 th stage.
Exemplarily, fig. 15 is a schematic diagram of a driving timing sequence provided by an embodiment of the present invention, and referring to fig. 14 and fig. 15, in a picture to be displayed in a first frame, clock pulse widths of a first clock signal and a second clock signal are both W1, and a time interval between an i-th pulse end time in the second clock signal (i is an integer greater than or equal to 1) and an i-th pulse start time in a fourth clock signal is Δ TG1, so that a pulse width of a scanning pulse signal is W1, a scanning gap is Δ TG1, and a period is TG1 ═ W1 +. Δ TG 1. The clock pulse widths of the third clock signal and the fourth clock signal are both W2, W2 < TG1, so that the period and the pulse width of the scan pulse signal are both W2.
It can be understood that, compared with the clock signals supplied to the shift registers VSR of the 3 × m1+1 th stage, the shift registers VSR of the 3 × m1+2 th stage and the shift registers VSR of the 3 × m1+3 rd stage by time sharing through the first clock signal line and the second clock signal line, the third clock signal and the fourth clock signal are supplied to the shift registers VSR of the 3 × m1+2 th stage and the 3 × m1+3 rd stage by adding the third clock signal line and the fourth clock signal line, the load on the display driving apparatus can be reduced, and the resource of the display driving apparatus is prevented from being excessively occupied.
On the basis of the above technical solution, with continuing reference to fig. 4, fig. 5, and fig. 8 to fig. 11, optionally, in two adjacent frames of to-be-displayed frames, the periods of the scan pulse signals sent to the sub-pixel units in the same row are different. The arrangement has the advantages that the inherent frequency characteristic of the scanning pulse signal can be disturbed to a greater extent, the energy value at the frequency doubling position is reduced, the electromagnetic interference is improved to a greater extent, and the normal work of electronic products around the display device is facilitated.
In the examples corresponding to fig. 6 to 15, the gate driving circuit is provided on the display panel, and the gate driving circuit generates the scanning pulse signal according to the clock signal, but the present application is not limited thereto, and in other embodiments, the gate driving circuit may be not provided on the display panel, and the gate integrated circuit chip (gate IC for short) may be used to directly output the scanning pulse signal required for each row of pixel cells.
Based on the above inventive concept, the embodiment of the invention further provides a display driving device. Fig. 16 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present invention. Referring to fig. 16, the display driving apparatus includes: an image obtaining module 110, configured to obtain an image to be displayed; a signal providing module 120, configured to provide a display signal to the sub-pixel by using the scan line and the data line according to an image to be displayed; an image display module 130, configured to display an image to be displayed according to the display signal;
the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the sub-pixel units in the same row are different.
Optionally, in at least two frames of pictures to be displayed, the pulse widths of the scanning pulse signals sent to the sub-pixel units in the same row are different; wherein, the pulse width refers to the continuous scanning time of the sub-pixel unit of the current row.
Optionally, in at least two frames of pictures to be displayed, the scanning gaps of the scanning pulse signals sent to the sub-pixel units in the same row are different; the scanning interval refers to an interval between a scanning end time of a current row of sub-pixel units and a scanning start time of a next row of sub-pixel units.
Optionally, in two adjacent frames of the to-be-displayed picture, the periods of the scanning pulse signals sent to the sub-pixel units in the same row are different.
Optionally, in the same frame of the to-be-displayed picture, the periods of the scanning pulse signals sent to the sub-pixel units of each row are the same.
Optionally, in the same frame of the to-be-displayed picture, the periods of the scanning pulse signals sent to the at least two rows of sub-pixel units are different.
Optionally, the scanning end time of the sub-pixel unit in the current row is earlier than the scanning start time of the sub-pixel unit in the next row.
Optionally, in the same frame of the to-be-displayed picture, the periods of the scanning pulse signals sent to the two adjacent rows of sub-pixel units are different.
Optionally, there are M rows of sub-pixel units, the scanning end time of the sub-pixel unit in the current row is earlier than the scanning start time of the sub-pixel unit in the next row, the pulse width of the scanning pulse signal is W1, and the period of the scanning pulse signal is T1; m is an integer greater than or equal to 1;
the method comprises the following steps that N rows of sub-pixel units exist, a time period corresponding to a scanning pulse signal of the sub-pixel unit in the current row partially overlaps a time period corresponding to a scanning pulse signal of the sub-pixel unit in the next row, the width of an overlapped part is T2, the width of a non-overlapped part is T3, and T2+ T3 is not equal to T1; n is an integer greater than or equal to 2;
inputting data signals of sub-pixel units of a current row to the sub-pixel units of the current row and the sub-pixel units of the next row within the overlapping time of scanning pulse signals of the sub-pixel units of the current row and the sub-pixel units of the next row; and inputting the data signals of the sub-pixel units of the next row in the time when the scanning pulse signals of the sub-pixel units of the next row do not overlap with the scanning pulse signals of the sub-pixel units of the current row.
Alternatively, t2 is t 3.
Alternatively, W1 ═ t 2.
The driving apparatus of the display panel according to the embodiment of the present invention is similar to the driving method of the display panel according to the above embodiment, and the technical details not described in detail in the embodiment can be referred to the above embodiment.
Based on the above inventive concept, the embodiment of the invention also provides a display device. The display device comprises any display panel driving device provided by the embodiment of the invention. Therefore, the display device has corresponding functions and advantages, which are not described in detail herein. Specifically, the display device may be an electronic display device such as a vehicle-mounted display screen, a mobile phone, a computer, or a television, which is not limited in the present application. When the display device is used as an on-vehicle display screen, the display device can be applied to vehicles such as automobiles, ships or airplanes. Fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention, including a driving device of any display panel according to an embodiment of the present invention, where the display device is applied in an automobile, and the display device may be independent of an inherent structure in the automobile, as shown in fig. 17, or may be integrated with other structures in the automobile, such as a front windshield or a table top around an instrument panel, which is not limited in this application.
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 (7)
1. The driving method of the display panel is characterized in that the display panel comprises scanning lines and data lines, the scanning lines and the data lines are crossed to define a plurality of rows and columns of sub-pixel regions, and sub-pixel units are arranged in the sub-pixel regions; the driving method includes:
acquiring an image to be displayed;
according to the image to be displayed, providing display signals to the sub-pixel units by using the scanning lines and the data lines;
displaying the image to be displayed according to the display signal;
wherein the display signal comprises a scanning pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the same row of sub-pixel units are different;
in two adjacent frames of pictures to be displayed, the periods of scanning pulse signals sent to the same row of sub-pixel units are different;
the driving method is characterized in that M rows of sub-pixel units exist, the scanning end time of the sub-pixel unit of the current row is earlier than the scanning start time of the sub-pixel unit of the next row, the pulse width of the scanning pulse signal is W1, and the period of the scanning pulse signal is T1; m is an integer greater than or equal to 1;
the method comprises the following steps that N rows of sub-pixel units exist, a time period corresponding to a scanning pulse signal of the sub-pixel unit in the current row partially overlaps a time period corresponding to a scanning pulse signal of the sub-pixel unit in the next row, the width of an overlapped part is T2, the width of a non-overlapped part is T3, and T2+ T3 is not equal to T1; n is an integer greater than or equal to 2;
inputting data signals of sub-pixel units of a current row to the sub-pixel units of the current row and the sub-pixel units of the next row within the overlapping time of scanning pulse signals of the sub-pixel units of the current row and the sub-pixel units of the next row; and inputting the data signals of the sub-pixel units of the next row in the time when the scanning pulse signals of the sub-pixel units of the next row do not overlap with the scanning pulse signals of the sub-pixel units of the current row.
2. The driving method according to claim 1, wherein the pulse widths of the scan pulse signals sent to the sub-pixel units in the same row are different in at least two frames of the to-be-displayed picture; wherein, the pulse width refers to the continuous scanning time of the sub-pixel unit of the current row.
3. The driving method according to claim 1, wherein the scanning intervals of the scanning pulse signals sent to the sub-pixel units in the same row are different in at least two frames of the picture to be displayed; the scanning interval refers to an interval between a scanning end time of a current row of sub-pixel units and a scanning start time of a next row of sub-pixel units.
4. The driving method according to claim 1, wherein t2 is t 3.
5. The driving method according to claim 1, wherein W1 ═ t 2.
6. A driving apparatus of a display panel for performing the driving method according to any one of claims 1 to 5; the driving device of the display panel includes:
the image acquisition module is used for acquiring an image to be displayed;
the signal providing module is used for providing display signals for the sub-pixels by utilizing the scanning lines and the data lines according to the image to be displayed;
the image display module is used for displaying the image to be displayed according to the display signal;
wherein the display signal comprises a scan pulse signal and a data signal; in at least two frames of pictures to be displayed, the periods of scanning pulse signals sent to the same row of sub-pixel units are different; in two adjacent frames of pictures to be displayed, the periods of scanning pulse signals sent to the same row of sub-pixel units are different.
7. A display device characterized by comprising the driving device of the display panel according to claim 6.
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