CN110379363B - Display panel driving method and driving device thereof, and display device - Google Patents
Display panel driving method and driving device thereof, and display device Download PDFInfo
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- CN110379363B CN110379363B CN201910818952.7A CN201910818952A CN110379363B CN 110379363 B CN110379363 B CN 110379363B CN 201910818952 A CN201910818952 A CN 201910818952A CN 110379363 B CN110379363 B CN 110379363B
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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]
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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
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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]
- G09G3/3275—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The embodiment of the invention discloses a driving method of a display panel, a driving device thereof and a display device, wherein the driving method of the display panel comprises the steps of setting the initial position of each subframe in a corresponding sub-display period based on the weight of a data bit; acquiring a sub-display period of each data bit in each row of the display panel in a display period of one frame based on the weight of the data bit so as to acquire the corresponding relation between time and row number and each data bit; acquiring a scanning order according to the corresponding relation and providing a scanning signal to the display panel according to the scanning order; and carrying out data recombination on each row of data and providing a data signal for the display panel according to the recombined data so as to drive the display panel to display. By the technical scheme of the invention, the data driving of the display panel is realized, meanwhile, the scanning time of each data bit is increased, the problem of dark display images is solved, and the improvement of the resolution of the display panel is facilitated.
Description
Technical Field
The embodiment of the invention relates to the field of display, in particular to a display panel driving method, a display panel driving device and a display device.
Background
At present, a light emitting system mainly comprises an analog driving mode and a digital driving mode in terms of gray scale implementation, the analog driving mode adjusts the luminance of a light emitting device by adjusting the driving current flowing through the light emitting device, the digital driving mode adjusts the luminance of the light emitting device by adjusting the light emitting time of the light emitting device, analog signals are easy to mix noise, high-precision control over the display gray scale of the light emitting device is difficult to achieve, and a digital driving circuit is more and more widely applied due to the advantages of low image noise, high switching speed and the like.
With the improvement of the requirements on the frame brushing rate and the display gray scale, the traditional scanning algorithm cannot be applied, the subfield concept is applied to various digital driving algorithms, the scanning time of the currently adopted subfield scanning algorithm is insufficient, the data storage is insufficient, and the displayed image is dark.
Disclosure of Invention
Embodiments of the present invention provide a driving method for a display panel, a driving device for the display panel, and a display device, so that data driving of the display panel is achieved, meanwhile, scanning time of each data bit is increased, the problem of dark display images is solved, and the resolution of the display panel is improved.
In order to realize the technical problem, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for driving a display panel, including:
dividing a frame into n sub-frames, and dividing the display period of the frame into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-an integer multiple of 1);
setting the initial position of each subframe in the corresponding sub-display period based on the weight of the data bit;
acquiring a sub-display period of each data bit in each row of the display panel in a display period of one frame based on the weight of the data bit so as to acquire the corresponding relation between time and row number and each data bit; in the display period of one frame, the same data bits of different rows are shifted step by step according to the row number;
acquiring a scanning order according to the corresponding relation and providing a scanning signal to the display panel according to the scanning order;
and carrying out data recombination on each row of data and providing a data signal to the display panel according to the recombined data so as to drive the display panel to display.
Further, setting the start position of each sub-frame in the corresponding sub-display period based on the weight of the data bits comprises:
dividing a display period of one frame into n time periods in sequence; the number of the sub-display periods contained in the n time periods sequentially corresponds to the weight from the low data bit to the high data bit;
and taking the first sub-display period in each time period as the starting position of each sub-frame.
Further, acquiring the sub-display period where each data bit in each row of the display panel is located based on the weight of the data bit includes:
in a display period of one frame, setting a low data bit of a first row at the initial position of a first subframe, and setting the rest data bits of the first row at the corresponding sub-display periods according to the weight of the data bits;
in the display period of one frame, shifting the data bit of the (i + 1) th row by the same sub-display period number respectively relative to the same data bit of the (i) th row; wherein i is a positive integer.
Further, the same number of sub-display periods of the shift is greater than n or equal to n.
Further, obtaining a scanning order according to the correspondence and providing a scanning signal to the display panel according to the scanning order comprises:
acquiring line numbers of all data bits which sequentially appear according to a time axis in the corresponding relation, and acquiring the scanning sequence according to the appearance sequence of the line numbers;
and selecting the scanning lines of the corresponding row in the display panel according to the scanning order to output the scanning signals.
Further, the data reorganizing of each row of data includes:
acquiring data of each row;
combining the same data bits in a row of data according to the arrangement sequence of the row of data to form n recombined data; wherein the number of bits of each reorganized data is equal to the effective column width in the display panel.
Further, providing a data signal to the display panel according to the reorganized data includes:
and sequentially outputting the n recombined data to each data line in a row according to the bit in the corresponding sub-display period.
Further, dividing the display period of one frame into m sub-display periods includes:
when the number of pixel lines of the display panel is more than (a-1) · (2)n-1) and less than or equal to a (2)n1) dividing the display period of one frame into a.n. (2)n-1) sub-display periods; wherein a is a positive integer.
In a second aspect, an embodiment of the present invention further provides a driving apparatus for a display panel, including: .
A dividing module for dividing one frame into n sub-frames and dividing a display period of one frameDividing into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-an integer multiple of 1);
a sub-frame allocation module for setting the start position of each sub-frame in the corresponding sub-display period based on the weight of the data bits;
the relationship acquisition module is used for acquiring the sub-display period of each data bit in each row of the display panel based on the weight of the data bit so as to acquire the corresponding relationship between time, row number and each data bit; in the display period of one frame, the same data bits of different rows are shifted step by step according to the row number;
the scanning driving module is used for acquiring a scanning sequence according to the corresponding relation and providing a scanning signal to the display panel according to the scanning sequence;
and the data driving module is used for carrying out data recombination on each row of data and providing data signals for the display panel according to the recombined data so as to drive the display panel to display.
In a third aspect, embodiments of the present invention further provide a display apparatus, including a display panel and a driving apparatus of the display panel according to the second aspect, wherein the display panel is electrically connected to the driving apparatus, the driving apparatus outputs the scan signal and the data signal to the display panel, and the display panel drives light emitting devices in the display panel to emit light according to the scan signal and the data signal.
The embodiment of the invention provides a driving method of a display panel, a driving device thereof and a display device, wherein the driving method for setting the display panel comprises the steps of dividing a frame into n sub-frames, dividing a display period of the frame into m sub-display periods, wherein n is the data bit number required to be displayed by the display panel, and m is n x (2)n-1) The initial position of each sub-frame is set in the corresponding sub-display period based on the weight of the data bit, and the sub-display period of each row of the display panel in which the data bit is located in the display period of one frame is obtained based on the weight of the data bitAnd a display period for obtaining the corresponding relationship between the time, the line number and each data bit, wherein in the display period of one frame, the same data bits in different lines are shifted step by step according to the line number, the scanning sequence is obtained according to the corresponding relationship, the scanning signal is provided for the display panel according to the scanning sequence, data recombination is performed on each line of data, and the data signal is provided for the display panel according to the recombined data to drive the display panel to display.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
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 driving method of a display panel according to an embodiment of the invention;
FIG. 3 is a timing diagram illustrating a driving method of an intra-frame display panel according to an embodiment of the present invention;
FIG. 4 is a timing diagram illustrating a driving sequence of a two-frame display panel according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a data reassembly method according to an embodiment of the present invention;
FIG. 6 is a timing diagram illustrating driving of a display panel in another frame according to an embodiment of the present invention;
FIG. 7 is a timing diagram illustrating a driving of a display panel in a frame according to another embodiment of the present invention;
FIG. 8 is a timing diagram illustrating a driving of a display panel in another frame according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a driving apparatus of 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, with the increase of the requirements for the frame refreshing rate and the display gray scale, the conventional scanning algorithm is not applicable, the subfield concept is applied to various digital driving algorithms, the scanning time of the currently adopted subfield scanning algorithm is insufficient, and thus the data storage is insufficient, and the displayed image is dark, which is specifically analyzed as follows:
the scanning time in the currently adopted subfield scanning algorithm is in an inverse relation with the number of pixel lines in the display panel, that is, the more the number of display lines in the display panel is, the smaller the scanning time is, and with the improvement of the resolution of the display panel, the number of pixel lines in the display panel is gradually increased, which causes insufficient scanning time, further causes insufficient data storage, and causes the problem of dark display image.
In view of this, embodiments of the present invention provide a driving method for a display panel, in which a Light Emitting device included in the display panel may be a Micro-LED (Micro Light Emitting Diode) or an Organic Light-Emitting Diode (OLED).
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 1, the display panel includes a timing controller 1, a data processor 2, a row scanning circuit 3, a column scanning circuit 4, a plurality of scanning lines 5, a plurality of data lines 6, and a plurality of pixel driving circuits 7, the pixel driving circuits are located in a space formed by the scanning lines and the data lines crossing, and the specific working flow of the display panel is as follows:
the data stream to be displayed enters the data processor 2, and the timing controller 1, which may be an FPGA (Field Programmable Gate Array) or other timing control device, generates scan signals according to a set scan algorithm to supply to the row scan circuit 3 and provide the data processor 2 with timing required for data processing, and then obtains the data signals through the data processor 2 and transmits the data signals to the column scan circuit 4. The scan signal through the row scan circuit 3 is scan-tft, which is connected to the gate of the transistor T1 in the pixel drive circuit 7, and the same data signal data-tft through the column scan circuit 4 is connected to the source of the transistor T1 in the pixel drive circuit 7. The working flow of the pixel driving circuit 7 is as follows: data is loaded to the data-tft first, the scan-tft signal becomes an active signal, the transistor T1 is turned on, the data-tft is loaded to the gate of the transistor T2 and charges and discharges the capacitor CS, the light emitting device LD starts emitting light after the voltage on the capacitor CS reaches the threshold voltage Vth of the transistor T2, after the scanning time elapses, the transistor T1 is turned off, the voltage stored on the capacitor CS ensures that the light emitting device LD continues emitting light until the data-tft of the signal enters to change the light emitting state of the light emitting device LD, and the transistor T1 and the transistor T2 may be both P-type transistors, for example. When the data signal is a digital signal, the bit number of the data signal corresponds to the gray scale number which can be displayed by the light-emitting device LD, the data signal realizes the adjustment of the light-emitting brightness of the light-emitting device by controlling the time length of the light-emitting device LD, and the weighting of the bit number of the data signal corresponds to the light-emitting time length of the light-emitting device LD, so that the adjustment of the light-emitting brightness of the light-emitting device LD is realized.
An embodiment of the present invention provides a driving method of a display panel, which can be executed by a driving apparatus of a display panel used in an embodiment of the present invention, and fig. 2 is a flowchart of the driving method of the display panel provided in the embodiment of the present invention. As shown in fig. 2, the driving method of the display panel includes:
s101, dividing a frame into n sub-frames, and dividing a display period of the frame into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-1) integer multiples.
Fig. 3 is a timing diagram of driving a display panel in a frame according to an embodiment of the invention. As shown in fig. 3, a frame SF is divided into n subframes, for example, a display panel is required to display 16 gray scales, the number of data bits n required to be displayed by the display panel is equal to 4, and the frame SF is divided into 4 subframes, for example, an SF1 subframe, an SF2 subframe, an SF3 subframe, and an SF4 subframe.
The display period TF of a frame is divided into m sub-display periods ST, m being equal to n (2)n-1), in case n is equal to 4, m is an integer multiple of 60, fig. 3 exemplarily sets m equal to 60, i.e. divides the display period TF of one frame SF into 60 sub-display periods ST. As shown in fig. 2, the sub-display period ST satisfies the following calculation formula:
s102, setting the initial position of each subframe in the corresponding sub-display period based on the weight of the data bit.
Specifically, the starting position of each sub-frame is set in the corresponding sub-display period ST based on the weight of the data bits, and taking the number n of data bits to be displayed on the display panel equal to 4 as an example, the weights from the lower data bits to the higher data bits are 1, 2, 4, and 8 in sequence. The display time period TF of one frame SF may be sequentially divided into n time periods, the number of sub-display periods included in the n time periods sequentially corresponds to the weight from the low data bit to the high data bit, that is, the display period TF of one frame SF is sequentially divided into 4 time periods, the number of sub-display periods included in the 4 time periods sequentially corresponds to the weight from the low data bit to the high data bit, that is, sequentially corresponds to 1, 2, 4, and 8, for example, the first time period t1 includes 4 sub-display periods ST, the second time period t2 includes 8 sub-display periods ST, the third time period t3 includes 16 sub-display periods ST, the fourth time period t4 includes 32 sub-display periods ST, and the number of sub-display periods included in the four time periods varies proportionally according to the weights from the low data bit to the high data bit, which are 1, 2, 4, and 8.
Taking the first sub-display period ST in each time segment as the start position of each sub-frame, that is, taking the first sub-display period ST in the first time segment t1 as the start position of the sub-frame SF1, taking the first sub-display period ST in the second time segment t2 as the start position of the sub-frame SF2, taking the first sub-display period ST in the third time segment t3 as the start position of the sub-frame SF3, and taking the first sub-display period ST in the fourth time segment t4 as the start position of the sub-frame SF4, the 4 sub-frames divided from one frame are allocated with the corresponding sub-display periods ST according to the weight of the data bits, so that the number of sub-display periods included in each sub-frame corresponds to the weight of the data bits.
S103, acquiring a sub-display period of each data bit in each row of the display panel in a display period of one frame based on the weight of the data bit to acquire the corresponding relation between time and row number and each data bit; in the display period of one frame, the same data bits of different rows are shifted step by step according to the row number. Specifically, the sub-display period ST in which each data bit in each row of the display panel is located in the display period of one frame is obtained based on the weight of the data bit, numbers 1 to 8 on the left side in fig. 3 indicate the pixel row number in the display panel, and in the display period of one frame, the low data bit a of the first row may be set at the start position of the first sub-frame SF1, that is, the low data bit of the first row is set in the first sub-display period ST in the sub-frame SF1, and the remaining data bits of the first row are set in the corresponding sub-display period according to the weight of each data bit, that is, the weight of the next low data bit is 2, so that the sub-display period ST in which the next low data bit B of the first row is located is set to be 4 sub-display periods ST apart from the sub-display period ST in which the low data bit of the first row is located; the weight of the second highest data bit is 4, so that the sub-display period ST where the second highest data bit C of the first row is located is set to be spaced from the sub-display period ST where the second lowest data bit of the first row by 8 sub-display periods ST; the weight of the high data bit is 8, so that the sub-display period ST where the first row of high data bits D is located and the sub-display period ST where the second row of next high data bits is located are set to be spaced by 16 sub-display periods ST, that is, the sub-display period number spaced between the sub-display periods ST where the front and back adjacent data bits of the first row are located is changed in equal proportion to the weight of the corresponding data bit.
For the data bits of the other rows, in the display period of one frame, the data bits of the (i + 1) th row are respectively shifted by the same number of sub-display periods relative to the same data bits of the ith row, where i is a positive integer, that is, in the display period of one frame, the data bits of the next row are respectively shifted by the same number of sub-display periods relative to the same data bits of the previous row. Illustratively, the same number of sub-display periods of the data bits of the next row shifted with respect to the same data bits of the previous row may be greater than n, i.e. more than 4, for example, the data bit a of the next row is shifted backward by 8 sub-display periods ST with respect to the data bit a of the previous row in fig. 3, and likewise, the data bit B, the data bit C and the data bit D of the next row are shifted backward by 8 sub-display periods ST with respect to the data bit B, the data bit C and the data bit D of the previous row respectively, it will be appreciated that the data bit D of row 5 may be understood as being shifted backwards with respect to the data bit D of row 4 by 8 sub-display periods ST, due to the limitation of one frame display period, the data bit D in the 5 th row is in the position shown in fig. 3, and similarly, the data bit C in the 7 th row and the data bit B in the 8 th row can be both understood as the same data bit in the previous row shifted backward by 8 sub-display periods ST. Thus, after the sub-display period where each data bit is located in each row of the display panel is obtained based on the weight of the data bit, the corresponding relationship between the time and the row number and each data bit as shown in fig. 3 can be obtained, where the horizontal direction in fig. 3 represents the time, the vertical direction represents the row number, and ABCD represents four data bits from the low data bit to the high data bit, respectively.
Specifically, the sub-display period ST provided with the data bit is a scan period, the sub-display period ST not provided with the data bit after the data bit is a hold period, for example, the sub-display period ST where the low data bit a is located is a scan period of the low data bit a, four sub-display periods ST after the scan period of the low data bit a are hold periods of the low data bit a, a scan signal is continuously provided in the scan period, the light emitting device adjusts a light emitting state according to data received in the scan period, the light emitting device maintains the light emitting state in the scan period in the hold period after the scan period, so that the low data bit of the first row is set at an initial position of the first sub-frame, and the rest of the data bits of the first row are set in the corresponding sub-display periods according to the weight of the data bits, and for the data bits of the rest of the rows, in the display period of one frame, the data bit of the (i + 1) row is respectively shifted by the same sub-display period as the same data bit of The holding time corresponds to the weight of each data bit, and the light-emitting device maintains the light-emitting state in the scanning period in the holding time, so that the holding time is used for realizing the weighting of each data bit, and further the control of different light-emitting durations of the light-emitting device in the display panel is realized according to the weighted value of each data bit, thereby realizing the digital driving of the display panel.
Fig. 4 is a timing diagram of driving a display panel in two frames according to an embodiment of the present invention. As can be seen from fig. 3 and 4, the correspondence of time, line number and data bit is the same in each frame, and is set in the display period of one frame, the lower data bit a of the first line is set at the start position of the first sub-frame SF1, and the rest data bits in the first row are set in the corresponding sub-display periods ST according to the weight of each data bit, the data bit in the (i + 1) th row is respectively shifted by the same sub-display period number relative to the same data bit in the (i) th row, so that the row which does not completely represent all data bits in the previous frame represents the missing data bits of the previous frame by means of the same row in the next frame, and further depends on time, that is, the weighting of all data bits is realized depending on the number of sub-display periods, for example, the data bit a, the data bit B, and the data bit C in the fifth row in the previous frame borrow the data bit D in the fifth row in the next frame, and thus the weighting of each data bit in the fifth row is realized.
And S104, acquiring a scanning sequence according to the corresponding relation and providing a scanning signal to the display panel according to the scanning sequence.
Alternatively, the line numbers sequentially appearing in each data bit may be acquired according to a time axis in the corresponding relationship, the scanning order may be acquired according to the appearance order of the line numbers, and the scanning lines of the corresponding lines in the display panel may be selected according to the scanning order to output the scanning signals.
Specifically, referring to fig. 1 and 3, with reference to the time shown in fig. 3, the scanning order is obtained according to the correspondence relationship between the line number and each data bit, and the line number of each data bit appearing in sequence is obtained according to the time axis in the correspondence relationship, for example, with reference to the time axis in fig. 3, the line number of each data bit appearing in sequence is 1 — >8 — >7 — >5 — >1 — >2. -, so that the scanning order is 1 — >8 — >7 — >5 — >1 — >2. -, which is determined, in combination with the arrangement of each sub-display period ST in fig. 3, the scanning line of the corresponding line in the display panel is selected according to the scanning order to scan the line, for example, the first line is scanned in the first sub-display period ST, the eighth line is scanned in the second sub-display period ST, the seventh line is scanned in the third sub-display period ST, the fifth line is scanned in the fourth sub-display period ST, and scanning a second line in the ninth sub-display period ST, and selecting the scanning line of the corresponding line according to the following rule to output a scanning signal to scan the line.
In this way, the scanning order is adopted for scanning, and the transmission of the scanning signals of the corresponding rows is gated according to the sending sequence of each data bit, so that the data bits can be sent to the pixels in the corresponding rows according to the corresponding relation, and meanwhile, the condition that two data bits need to be sent simultaneously in the same sub-display period ST can not exist in the scanning process, namely the condition that two rows or more than two rows are scanned simultaneously in the same sub-display period ST can not occur, the condition that the same data are sent to the pixels in different rows at the same time is avoided, and the display panel is ensured to realize the normal display function.
And S105, carrying out data recombination on each row of data and providing a data signal to the display panel according to the recombined data so as to drive the display panel to display.
Optionally, the data of each row may be obtained first, and then the same data bits in one row of data are combined according to the arrangement order of the one row of data to form n pieces of recombined data, where the bit number of each piece of recombined data is equal to the effective column width in the display panel.
Fig. 5 is a schematic diagram of a data reassembly method according to an embodiment of the present invention. With reference to fig. 1 to fig. 5, data of each row is acquired, that is, data corresponding to each pixel in each row is acquired, and the acquired row of data may be, for example, 1010, 1101, 0101, 0010, and 1100. Combining the same data bits in a line of data according to the arrangement sequence of a line of data to form n recombined data, namely grouping the data in a line of data from a low data bit to a high data bit to form n recombined data, taking data 1010 as an example, the low data bit is the last bit 0, the high data bit is the first bit 1, and the weights of the data represented by the low data bit and the high data bit are 1 and 8 respectively, so that the low data bits of all the data in a line can form recombined data a, a is the data B formed by arranging the low data bits in all the data in a line according to the arrangement sequence of pixels in a line, referring to the line of data, a is 01100. Referring to the above-mentioned one line of data, B is 10010.. this is, the next highest data bits in all the data in one line are combined into the recombined data C, C is the data C formed by arranging the next highest data bits of all the data in one line in the order of arranging the pixels in one line, referring to the above-mentioned one line of data, C is 01101.. this is, the highest data bits in all the data in one line are combined into the recombined data D, D is the data D formed by arranging the highest data bits of all the data in one line in the order of arranging the pixels in one line, referring to the above-mentioned one line of data, D is 11001.. Thus, the bit number of each recombined data is equal to the effective column width of the display panel, and the number of columns of pixels included in the display panel is the effective column width of the display panel, that is, how many columns of pixels the display panel includes, how many bits of data the data a, the data B, the data C, and the data D include.
Optionally, the data signal is provided to the display panel according to the recombined data, and the n recombined data are sequentially output to each data line in one row by bit in the corresponding sub-display period. Specifically, with reference to fig. 1 to 5, the output timings of the scan signal and the data signal can be determined according to the previously obtained scan sequence, a certain row can be selected by the scan signal output from the scan line (for example, the transistor T1 in the pixel driving circuit of each pixel in the row is turned on, for example, the potential on the scan line in the row is pulled down, and the potential on the scan lines in the other rows is pulled up, in this case, the transistors in the pixel driving circuit are all P-type transistors, for example), one data of n pieces of data after being recombined is loaded onto each data line by bit, since only the T1 transistor of the selected row is turned on, the data is stored on the storage capacitor CS in the pixel driving circuit, after waiting for one sub-display period ST, the voltage is kept to ensure the on or off of the light emitting device, until the row is selected again, the light emitting state of the light emitting device is changed after new data is written.
Taking the n pieces of data after the rearrangement as an example, the column scanning circuit may output data signals to the data lines D1 to Dm, respectively, based on the n pieces of data after the rearrangement in one frame, taking the pixel of the first row as an example:
in the first sub-display period ST, 01100.... that included in the recombined data a is sent to each pixel in the first row one by one, that is, the first data line is sent to 0, the second data line is sent to 1, the third data line is sent to 1, the fourth data line is sent to 0, and the fifth data line is sent to 0, and the four sub-display periods ST following the first sub-display period ST are used for realizing the weighting of the recombined data a corresponding to the low data bit, the weighting value is 1, the first sub-display period ST is the scanning time, and the following four sub-display periods ST are the holding time.
In the sixth sub-display period ST, 10010..... that the recombined data B contains is sent to each pixel in the first row one by one, that is, the first data line is sent to 1, the second data line is sent to 0, the third data line is sent to 0, the fourth data line is sent to 1, and the fifth data line is sent to 0, and the eight sub-display periods ST following the fifth sub-display period ST are used to realize the weighting of the recombined data B corresponding to the next lower data bit, the weighting value is 2, the sixth sub-display period ST is the scanning time, and the following eight sub-display periods ST are the holding time.
In the fifteenth sub-display period ST, the 01101.... the recombined data C includes is sent to each pixel in the first row one by one, that is, the first data line is sent to 0, the second data line is sent to 1, the third data line is sent to 1, the fourth data line is sent to 0, and the fifth data line is sent to 1, and the sixteen sub-display periods ST after the fifteenth sub-display period ST are used for realizing the weighting of the recombined data C corresponding to the next-higher data bit, the weighting value is 4, the fifteenth sub-display period ST is the scanning time, and the following is six sub-display periods ST the holding time.
In the thirty-second sub-display period ST, 11001.... the recombined data D is sent to each pixel in the first row one by one, that is, the first data line is sent to 1, the second data line is sent to 1, the third data line is sent to 0, the fourth data line is sent to 0, and the fifth data line is sent to 1, and thirty-two sub-display periods ST after the thirty-second sub-display period ST are used for realizing the weighting of the recombined data D corresponding to the high data bit, the weighting value is 8, the thirty-second sub-display period ST is the scanning time, and the thirty-two sub-display periods ST after the thirty-second sub-display period ST are the holding time.
Thus, the data dependency of different data bits in each data on the number of the sub-display periods ST included in the holding time realizes the weighting of the corresponding data bits, and further realizes the adjustment of the light emitting time of the corresponding light emitting device in the display panel, and further adjusts the light emitting brightness of the light emitting device.
Referring to the correspondence relationship between time, line number, and data bit shown in fig. 3, a first line is first gated by a scan line, in a first sub-display period ST, the recombined data a includes 01100.... the data a is sent to each pixel in the first line one by one, in a next period, an eighth line is gated by the scan line, in a second sub-display period ST, the data 10010.. included in the recombined data B is sent to each pixel in the eighth line one by one, in a next period, the seventh line is gated by the scan line, in a third sub-display period ST, the recombined data C includes 01101.. the data C is sent to each pixel in the seventh line one by one, in a next period, the fifth line is gated by the scan line, in a fourth sub-display period ST, the recombined data D includes 11001.. the data d.is sent to each pixel in the fifth line one by one, and so on to drive the display panel to display.
Thus, the embodiment of the invention realizes the digital driving of the display panel when m is equal to n (2)nAnd-1), the scanning duration of each data bit is a sub-display period ST, the sub-display period ST is independent of the number of lines of the display panel, which is beneficial to increasing the scanning time of each data bit, improving the problem of dark display images caused by insufficient data storage due to insufficient scanning time, and improving the resolution of the display panel. In addition, after data recombination is carried out on each row of data, data signals are provided according to the recombined data, reading and using can be carried out immediately, occupation of data reading time on scanning time is avoided, and the scanning time of each data bit is further increased.
In addition, although the scanning timing of the display panel is jumped from the scanning line sequence, for the same data bit, the scanning of the adjacent same data bit is still larger by 1 for the next scanning line than for the previous scanning line, and considering the line number cycle, the first line is the next line of the last line, therefore, for the same data bit, the scanning timing is still changed regularly, and the display panel is compatible with the multi-level goa (gate On array) circuit in the current display panel. As shown in fig. 3, no action is generated in many sub-display periods, which is beneficial to reducing the scanning frequency of the display panel to reduce the power consumption of the display panel.
FIG. 6 is a timing diagram illustrating a driving of a display panel in another frame according to an embodiment of the present invention. Fig. 3 only exemplarily shows a case where the number of the sub-display periods of the data bit of the i +1 th row with respect to the same data bit of the i th row is greater than n, fig. 6 exemplarily shows a case where the number of the shifted same sub-display periods is equal to n, and as shown in fig. 6, taking the number of bits n of the data to be displayed by the display panel as 4 as an example, the sub-display period ST where each data bit of each row of the display panel is located within the display period of one frame may also be obtained based on the weight of the data bit, the lower data bit a of the first row may be set at the start position of the first sub-frame SF1 within the display period of one frame, and the remaining data bits of the first row may be set at the corresponding sub-display periods according to the weight of each data bit, and for the data bits of the remaining rows, the data bit of the i +1 th row with respect to the same data bit of the i th row may be shifted by the same number of the sub-display periods respectively within the display period of one frame, the number of shifted sub-display periods is equal to n, that is, the number of data bits in adjacent rows is shifted by 4 sub-display periods ST, the scanning timing shown in fig. 6 has the same scanning utilization rate as the scanning timing shown in fig. 3, the scanning utilization rate is equal to the ratio of the effective scanning times to the total scanning times, the effective scanning times can be obtained according to the number of sub-display periods provided with the data bits, and the total scanning times is equal to the total number of the sub-display periods ST in one frame.
Optionally, the display period of one frame is divided into m sub-display periods ST, when the number of pixel lines of the display panel is greater than (a-1) · (2)n-1) and less than or equal to a (2)n1) dividing the display period of one frame into a.n. (2)n-1) sub-display periods ST, a being a positive integer. In particular, in connection with fig. 3 and 6, the display panel comprises 8 rows of pixels, 2n1 equals 15, it can be determined that a equals 1, i.e. the number of lines of the display panel is greater than 0, less than or equal to 15, the display period of one frame is divided into a · n · (2)n-1), i.e. divided into 60 sub-display periods. FIG. 7 is a timing diagram of driving a display panel in another frame according to an embodiment of the present invention, as shown in FIG. 7, the display panel includes 15 rows of pixels, and if it is also determined that a is equal to 1, i.e., the number of rows of the display panel is greater than 0 and less than or equal to 15, the display period of one frame is divided into a.n. (2)n-1), namely divided into 60 sub-display periods, the driving timing shown in fig. 7, the scanning utilization of the display panel is 100%, namely, the action is generated in each sub-display period.
FIG. 8 is a timing diagram illustrating a driving of a display panel in a frame according to another embodiment of the present invention. As shown in fig. 8, the display panel comprises 30 rows of pixels, and it is also determined that a is equal to 2, i.e. the number of rows of the display panel is greater than 15 and less than or equal to 30, the display period of one frame is divided into a · n · (2)n-1), i.e. divided into 120 sub-display periods, ofTo realize the weighting of the four sub-frames corresponding to different data bits, the sub-frame SF1 may include 8 sub-display periods ST, the sub-frame SF2 includes 16 sub-display periods ST, the sub-frame SF3 includes 32 sub-display periods ST, and the sub-frame SF4 includes 64 sub-display periods ST.
Similarly, the sub-display period ST in which each data bit in each row of the display panel is located in the display period of one frame may be obtained based on the weight of the data bit, the lower data bit a of the first row may be set at the start position of the first sub-frame SF1 in the display period of one frame, and the remaining data bits of the first row may be set in the corresponding sub-display periods according to the weight of each data bit, and for the data bits of the remaining rows, the data bit of the i +1 th row is shifted by the same sub-display period number with respect to the same data bit of the i-th row in the display period of one frame, and the shifted same sub-display period number may be equal to n, that is, the same data bit of the adjacent row is 4 sub-display periods ST, so that the digital driving of the display panel may be realized, and it may be ensured that there is no situation that two data bits need to be simultaneously sent in the same sub-display period ST during the scanning process, that is, the situation of scanning two or more lines simultaneously in the same sub-display period ST does not occur, the same data is prevented from being sent to the pixels in different lines at the same time, and the display panel is ensured to realize the normal display function.
In addition, the display period of one frame is divided into a.n. (2)n-1) sub-display periods, i.e. the display period TF of a frame SF is divided into a n (2)n-1) sub-display periods ST satisfying the following calculation formula:
thus, when m is greater than n (2)n-1) and is n (2)n-1), ST likewise decreases with increasing number of pixel lines in the display panel, but the magnitude of ST decrease with the number of pixel lines and n (2)n1) is inversely proportional to the number of pixel rows, directly inversely proportional to the prior art ST, i.e. a is directly replaced by a pictureThe number of the pixel lines is also beneficial to increasing the scanning time of each data bit, improving the problem of dark displayed images caused by insufficient data storage due to insufficient scanning time and improving the resolution of the display panel.
Fig. 9 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 9, the driving apparatus of the display panel includes a dividing module 21, a sub-frame allocating module 22, a relationship obtaining module 23, a scanning driving module 24 and a data driving module 25, where the dividing module is configured to divide a frame into n sub-frames and divide a display period of the frame into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-an integer multiple of 1); the sub-frame distribution module is used for setting the initial position of each sub-frame in the corresponding sub-display period based on the weight of the data bit; the relation acquisition module is used for acquiring the sub-display period where each data bit is positioned in each row of the display panel based on the weight of the data bit so as to acquire the corresponding relation between time, row number and each data bit; wherein, in the display period of a frame, the same data bits of different rows are shifted step by step according to the row number; the scanning driving module is used for acquiring a scanning sequence according to the corresponding relation and providing a scanning signal for the display panel according to the scanning sequence; the data driving module is used for carrying out data recombination on each row of data and providing data signals for the display panel according to the recombined data so as to drive the display panel to display.
The driving device of the display panel provided by the embodiment of the invention can realize data driving of the display panel, simultaneously increase the scanning time of each data bit, improve the problem of insufficient data storage caused by insufficient scanning time and further darker displayed images, and is beneficial to improving the resolution of the display panel. In addition, after data recombination is carried out on each row of data, data signals are provided according to the recombined data, reading and using can be carried out immediately, occupation of data reading time on scanning time is avoided, and the scanning time of each data bit is further increased.
An embodiment of the present invention provides a display device, where the display device according to the embodiment of the present invention includes a display panel and a driving device of the display panel according to any embodiment described above, the display panel is electrically connected to the driving device, the driving device outputs a driving voltage to the display panel, the display panel drives a light emitting device in the display panel to emit light according to the received driving voltage, and the display device includes the display panel and the driving device of the display panel according to any embodiment described above. For example, the display device may be an organic light emitting display device, the display device may be a mobile phone, or may be an electronic device such as a computer or a wearable device, and the specific form of the display device is not limited in the embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious 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. A method of driving a display panel, comprising:
dividing a frame into n sub-frames, and dividing the display period of the frame into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-an integer multiple of 1);
setting the initial position of each subframe in the corresponding sub-display period based on the weight of the data bit;
acquiring a sub-display period of each data bit in each row of the display panel in a display period of one frame based on the weight of the data bit so as to acquire the corresponding relation between time and row number and each data bit; in the display period of one frame, the same data bits of different rows are shifted step by step according to the row number;
acquiring a scanning order according to the corresponding relation and providing a scanning signal to the display panel according to the scanning order;
carrying out data recombination on each row of data and providing data signals for the display panel according to the recombined data so as to drive the display panel to display;
acquiring a scanning order according to the correspondence and providing a scanning signal to the display panel according to the scanning order comprises:
acquiring line numbers of all data bits which sequentially appear according to a time axis in the corresponding relation, and acquiring the scanning sequence according to the appearance sequence of the line numbers;
selecting the scanning lines of the corresponding rows in the display panel according to the scanning order to output the scanning signals;
the data reorganization of each row of data comprises the following steps:
acquiring data of each row;
combining the same data bits in a row of data according to the arrangement sequence of the row of data to form n recombined data; wherein the number of bits of each reorganized data is equal to the effective column width in the display panel.
2. The driving method according to claim 1, wherein setting the start position of each sub-frame within the corresponding sub-display period based on the weight of the data bits comprises:
dividing a display period of one frame into n time periods in sequence; the number of the sub-display periods contained in the n time periods sequentially corresponds to the weight from the low data bit to the high data bit;
and taking the first sub-display period in each time period as the starting position of each sub-frame.
3. The driving method according to claim 1, wherein obtaining the sub-display period of each data bit in each row of the display panel based on the weight of the data bit comprises:
in a display period of one frame, setting a low data bit of a first row at the initial position of a first subframe, and setting the rest data bits of the first row at the corresponding sub-display periods according to the weight of the data bits;
in the display period of one frame, shifting the data bit of the (i + 1) th row by the same sub-display period number respectively relative to the same data bit of the (i) th row; wherein i is a positive integer.
4. A driving method according to claim 3, wherein the same number of sub-display periods shifted is greater than n or equal to n.
5. The driving method according to claim 1, wherein providing a data signal to the display panel according to the reorganized data comprises:
and sequentially outputting the n recombined data to each data line in a row according to the bit in the corresponding sub-display period.
6. The driving method according to claim 1, wherein dividing the display period of one frame into m sub-display periods comprises:
when the number of pixel lines of the display panel is more than (a-1) · (2)n-1) and less than or equal to a (2)n1) dividing the display period of one frame into a.n. (2)n-1) sub-display periods; wherein a is a positive integer.
7. A driving apparatus of a display panel, comprising:
the device comprises a dividing module, a display module and a display module, wherein the dividing module is used for dividing a frame into n sub-frames and dividing the display period of the frame into m sub-display periods; wherein n is the number of data bits required to be displayed by the display panel, and m is equal to n (2)n-an integer multiple of 1);
a sub-frame allocation module for setting the start position of each sub-frame in the corresponding sub-display period based on the weight of the data bits;
the relationship acquisition module is used for acquiring the sub-display period of each data bit in each row of the display panel based on the weight of the data bit so as to acquire the corresponding relationship between time, row number and each data bit; in the display period of one frame, the same data bits of different rows are shifted step by step according to the row number;
the scanning driving module is used for acquiring a scanning sequence according to the corresponding relation and providing a scanning signal to the display panel according to the scanning sequence; the scanning driving module is specifically used for acquiring line numbers of each data bit which appear in sequence according to a time axis in the corresponding relation and acquiring the scanning sequence according to the appearance sequence of the line numbers; selecting the scanning lines of the corresponding rows in the display panel according to the scanning order to output the scanning signals;
the data driving module is used for carrying out data recombination on each row of data and providing data signals for the display panel according to the recombined data so as to drive the display panel to display; the data driving module is specifically used for acquiring data of each row; combining the same data bits in a row of data according to the arrangement sequence of the row of data to form n recombined data; wherein the number of bits of each reorganized data is equal to the effective column width in the display panel.
8. A display apparatus comprising a display panel and a driving apparatus of the display panel according to claim 7, the display panel being electrically connected to the driving apparatus, the driving apparatus outputting the scanning signal and the data signal to the display panel, the display panel driving light emitting devices in the display panel to emit light in accordance with the reception of the scanning signal and the data signal.
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Also Published As
| Publication number | Publication date |
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| KR102606692B1 (en) | 2023-11-29 |
| CN110379363A (en) | 2019-10-25 |
| KR20220025056A (en) | 2022-03-03 |
| WO2021036303A1 (en) | 2021-03-04 |
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