CN116129796A - 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 PDF

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Publication number
CN116129796A
CN116129796A CN202211715579.0A CN202211715579A CN116129796A CN 116129796 A CN116129796 A CN 116129796A CN 202211715579 A CN202211715579 A CN 202211715579A CN 116129796 A CN116129796 A CN 116129796A
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China
Prior art keywords
sub
driving data
display
frame
writing
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Pending
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CN202211715579.0A
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Chinese (zh)
Inventor
邢振周
鉏文权
于岚
朱修剑
莫健
陈心全
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Kunshan Govisionox Optoelectronics Co Ltd
Hefei Visionox Technology Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
Hefei Visionox Technology Co Ltd
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Application filed by Kunshan Govisionox Optoelectronics Co Ltd, Hefei Visionox Technology Co Ltd filed Critical Kunshan Govisionox Optoelectronics Co Ltd
Priority to CN202211715579.0A priority Critical patent/CN116129796A/en
Publication of CN116129796A publication Critical patent/CN116129796A/en
Pending legal-status Critical Current

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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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a driving method, a driving device and a display device of a display panel, wherein the driving method of the display panel comprises the following steps: determining initial driving data of each sub-pixel in each written frame according to a picture to be displayed; adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; at least a portion of the write frames includes a first of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted; and driving the sub-pixels to display the picture to be displayed according to the final driving data. The invention can improve the display effect of the display panel.

Description

Driving method and driving device of display panel and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method and device for a display panel, and a display device.
Background
With the rapid development of display technology, display requirements of display panels are increasing. However, the existing display panel has the problem of brightness variation in the display process, which affects the display effect of the display panel.
Disclosure of Invention
The invention provides a driving method and device for a display panel and the display device, so as to improve the display effect of the display panel.
According to an aspect of the present invention, there is provided a driving method of a display panel including a display region including at least two sub-display regions, each of the sub-display regions including a plurality of sub-pixels; one driving period of the sub-pixel includes a writing phase and a holding phase, the writing phase including at least two writing frames;
the driving method includes:
determining initial driving data of each sub-pixel in each written frame according to a picture to be displayed;
adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and decreasing the initial driving data; the at least partial write frame includes a first write frame of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
and driving the sub-pixels to display the picture to be displayed according to the final driving data.
By the arrangement, on the premise that the display brightness superposition of the writing frames accords with the brightness of the picture to be displayed, the brightness difference between the first writing frame and the last holding frame of the last driving period is reduced, and the display effect of the display panel is improved.
Optionally, the at least partial write frame further includes a last write frame of the at least two write frames; and in the last written frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the last written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted.
By the arrangement, on the premise that the display brightness superposition of the writing frames accords with the brightness of the picture to be displayed, the brightness difference between the writing stage and the holding stage in one driving period is reduced, and the display effect of the display panel is further improved.
Optionally, in each writing frame, the adjustment manners of the partial sub-display areas and other sub-display areas are different, or the initial driving data of the partial sub-display areas are adjusted, and the initial driving data of the partial sub-display areas are not adjusted.
By the arrangement, each writing frame has smaller brightness difference with the holding stage of the previous driving period and the holding stage of the driving period, and the display effect of the display panel is further improved.
Optionally, the adjustment manners of adjacent sub-display areas in each writing frame are different. The brightness of each sub-display area in the same writing frame is ensured to be changed alternately, the brightness difference between the writing frame and the maintaining stage is ensured to be reduced, the picture brightness of the writing frame is more uniform, and the display panel is ensured to have better display effect.
Optionally, the plurality of sub display areas are sequentially arranged along a row direction or a column direction, or the plurality of sub display areas are arranged in an array.
The plurality of sub-display areas are arranged in sequence along the row direction or the column direction, so that the driving difficulty of the display panel is reduced. The arrangement of the plurality of sub-display areas ensures that the brightness difference between the writing stage and the holding stage is smaller, and meanwhile, the brightness of the picture of the written frame is more uniform, so that the display panel has better display effect.
Optionally, in the adjustment manner, an increased value when the initial driving data is increased is a first value, and a decreased value when the initial driving data is decreased is a second value, where the first value and the second value are equal. By the arrangement, the adjustment difficulty of initial driving data of the display panel can be reduced, and the driving speed is improved.
Optionally, in one driving period, the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area is equal to the initial driving data. The arrangement is that the display brightness superposition of all the written frames of each sub-pixel is equal to the brightness of the picture to be displayed, so that the display panel is ensured to have higher picture display precision.
Optionally, each of the write frames includes a light emitting sub-phase, the hold phase includes at least two hold frames, and each of the hold frames includes a light emitting sub-phase;
driving the sub-pixels to display the picture to be displayed according to the final driving data, including:
driving the sub-pixels to emit light in the light emitting sub-stage; and the time length of the light-emitting sub-stage of each writing frame is longer than that of the light-emitting sub-stage of the writing frame.
By the arrangement, the brightness difference between the holding frame and the writing stage can be reduced, the light-emitting duration gradually increases from the first writing frame to the last writing frame, and sudden change of the light-emitting duration in the holding stage is avoided, so that sudden change of brightness is avoided.
Optionally, the duration of the light emitting sub-phase of at least part of the holding frames gradually increases from the first holding frame to the last holding frame in the at least two holding frames. The longer the hold frame is made to emit light farther away from the writing phase, thereby reducing the luminance difference between the hold frame and the writing phase.
According to another aspect of the present invention, there is provided a driving apparatus of a display panel including a display region including at least two sub-display regions, each of the sub-display regions including a plurality of sub-pixels; one driving period of the sub-pixel includes a writing phase and a holding phase, the writing phase including at least two writing frames;
the driving device includes:
the initial driving data determining module is used for determining initial driving data of each sub-pixel in each writing frame according to the picture to be displayed;
the final driving data determining module is used for adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and decreasing the initial driving data; the at least partial write frame includes a first write frame of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
and the driving module is used for driving the sub-pixels to display the picture to be displayed according to the final driving data.
According to another aspect of the present invention, there is provided a display device including a display panel and a driving device of the display panel according to any embodiment of the present invention.
The embodiment of the invention sets the display area to comprise at least two sub-display areas, sets the writing stage to comprise at least two writing frames, and determines the initial driving data of each sub-pixel in each writing frame according to the picture to be displayed; adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in the first writing frame of at least part of writing frames, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted; when the sub-pixels are driven according to the final driving data to display the picture to be displayed, the brightness difference between the middle molecular display area of the first writing frame and the last holding frame of the last driving period is reduced, and the average value of the final driving data and the initial driving data of all writing frames corresponding to the sub-pixels in each sub-display area is smaller than a preset threshold value in one driving period, so that the brightness difference between the first writing frame and the last holding frame of the last driving period is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of the picture to be displayed, and the display effect of the display panel is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a timing diagram of a prior art display panel;
FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a flowchart of a driving method of a display panel according to an embodiment of the present invention;
FIG. 4 is a timing diagram of driving a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a write frame according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of yet another write frame provided by an embodiment of the present invention;
FIG. 7 is a schematic view of a display panel according to another embodiment of the present invention;
FIG. 8 is a timing diagram of driving a display panel according to another embodiment of the present invention;
fig. 9 is a schematic diagram of a driving device of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a display device according to an embodiment of the invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As mentioned in the background art, the existing display panel has a brightness variation at the time of display, and the inventors have found out through long-term study that the cause of such a problem arises from: fig. 1 is a driving timing diagram of a display panel in the prior art, referring to fig. 1, when the display panel displays a picture at a smaller picture refresh frequency, one driving period a generally includes a writing period A1 and a holding period A2, the writing period A1 generally includes a writing frame, and the holding period includes a plurality of holding frames Skip. The writing frame writes the data voltage into the driving unit, and the driving unit drives the light emitting diode to emit light. The driving unit generates a driving current according to the data voltage stored in the storage unit to drive the light emitting diode to emit light. Because the storage unit has leakage, the data voltage stored in the storage unit can be gradually attenuated when the frame Skip is maintained, the driving current generated by the driving unit can be changed due to the attenuation of the data voltage stored in the storage unit, and the brightness of the light emitting diode can be further changed, so that the display brightness of the display panel in the writing stage A1 is different from the display brightness in the maintaining stage A2, namely the brightness of the display panel can be changed when the display panel displays a frame of picture, and the display effect of the display panel is affected.
Referring to fig. 1, in order to reduce the brightness difference between the writing phase A1 and the holding phase A2 in the prior art, the writing phase A1 is configured to include three writing frames, i.e., a writing frame, (writing+a) frame and (writing+a') frame, each of which writes driving data to the driving unit, and the driving data written by the three writing frames gradually decreases. However, in the existing scheme, the Write frame is the initial frame of the writing stage A1, and the brightness is highest; the previous holding frame Skip of the Write frame has the lowest brightness due to the continuous leakage of the storage unit, so that the existing improvement scheme still has larger brightness difference between the Write frame and the previous holding frame Skip of the Write frame, is easy to observe the phenomena of flicker and shake, and affects the display effect of the display panel.
In view of the above technical problems, an embodiment of the present invention provides a driving method of a display panel, and fig. 2 is a schematic diagram of the display panel provided by the embodiment of the present invention, referring to fig. 2, the display panel includes a display area 10, the display area 10 includes at least two sub-display areas 11, and each sub-display area 11 includes a plurality of sub-pixels 101; one driving period a of the sub-pixel 101 includes a writing phase A1 and a holding phase A2, the writing phase A1 including at least two writing frames (writeb, writec);
fig. 3 is a flowchart of a driving method of a display panel according to an embodiment of the present invention, and referring to fig. 3, the driving method of the display panel includes:
s110, determining initial driving data of each sub-pixel in each writing frame according to the picture to be displayed.
The picture to be displayed is a picture to be displayed by the display panel. The display panel typically stores driving data corresponding to a plurality of different gray levels or a plurality of different brightness levels. The gray scale or brightness of each sub-pixel to be displayed can be determined according to the picture to be displayed, and the initial driving data can be determined according to the gray scale or brightness and the driving data corresponding to a plurality of different gray scales or different brightnesses stored in the display panel. For example, the display panel stores driving data corresponding to 16 gray scales, 32 gray scales, 64 gray scales, 128 gray scales and 255 gray scales, if it is determined that the gray scale to be displayed for a certain sub-pixel is 64 gray scales according to the picture to be displayed, the driving data corresponding to 64 gray scales stored in the display panel is directly determined as initial driving data corresponding to the sub-pixel, if it is determined that the gray scale to be displayed for a certain sub-pixel is 100 gray scales according to the picture to be displayed, the driving data corresponding to 64 gray scales and the driving data corresponding to 128 gray scales stored in the display panel can be interpolated to obtain driving data corresponding to 100 gray scales, and the driving data obtained by interpolation is used as initial driving data of the sub-pixel.
S120, adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and decreasing the initial driving data; at least a portion of the write frames includes a first of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted.
Specifically, the initial driving data of a part of the written frames may be adjusted, or the initial driving data of all the written frames may be adjusted. Fig. 4 is a driving timing chart of a display panel according to an embodiment of the present invention, and referring to fig. 4, two driving periods a are shown in fig. 4, where one driving period a corresponds to displaying a frame of a picture to be displayed. In fig. 4, scan-stv_p and Scan-stv_n are Scan signals controlling the driving data writing driving unit; vsync is a frame initialization signal, EM-stv_p is a light emission control signal, source is driving data, and luminence is display Luminance. One writing phase A1 may include two writing frames or may include a plurality of writing frames. In a driving period A, the difference value between the average value of the final driving data of all the writing frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value, so that the superimposed brightness of a plurality of writing frames of each sub-pixel is ensured to be close to or equal to the target brightness of a picture to be displayed, and the preset threshold value can be set according to the display requirement of a display panel.
Referring to fig. 2 and 4, the first write frame writeb is a write frame adjacent to the previous drive period a in the write phase A1. The display area 10 of the display panel may include two or more sub-display areas 11. In the first writing frame write, the adjustment modes of the partial sub-display area 11 and the other sub-display areas 11 are different, that is, the initial driving data of the partial sub-display area 11 is reduced, the initial driving data of the partial sub-display area 11 is increased, and by setting the initial driving data of the partial sub-display area 11 to be reduced, when the partial sub-display area 11 displays the picture to be displayed, the brightness difference between the first writing frame write and the last holding frame Skip of the last driving period a is reduced, and because the difference between the average value of the final driving data and the initial driving data of all writing frames corresponding to the sub-pixels in each sub-display area 11 in one driving period a is smaller than the preset threshold value, the brightness difference between the first writing frame write and the last holding frame Skip of the last driving period a is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of the picture to be displayed.
In the first writing frame write, the initial driving data of the partial sub-display area 11 is adjusted, the initial driving data of the partial sub-display area 11 is not adjusted, and the initial driving data of the partial sub-display area 11 is reduced, and the partial sub-display area 11 is not adjusted; it is also possible that the initial driving data of the partial sub-display section 11 is increased and the initial driving data of the partial sub-display section 11 is not adjusted; it is also possible that the initial driving data of the partial sub-display section 11 is decreased, the initial driving data of the partial sub-display section 11 is not adjusted, and the initial driving data of the partial sub-display section 11 is increased. By setting the initial driving data of the sub-display area 11 of the first writing frame writeb portion not to be adjusted, the brightness difference between the sub-display area 11 and the last holding frame Skip of the previous driving period a is relatively reduced, and since the difference between the average value of the final driving data of all the writing frames corresponding to the sub-pixels 101 in each sub-display area 11 and the initial driving data is smaller than the preset threshold value in one driving period a, the brightness difference between the first writing frame writeb and the last holding frame Skip of the previous driving period a is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of the picture to be displayed.
S130, driving the sub-pixels to display the picture to be displayed according to the final driving data.
That is, at each writing frame, the final driving data of the writing frame is written into the sub-pixels in turn according to the driving timing, so that the sub-pixels realize the display of the picture to be displayed.
The embodiment of the invention sets the display area to comprise at least two sub-display areas, sets the writing stage to comprise at least two writing frames, and determines the initial driving data of each sub-pixel in each writing frame according to the picture to be displayed; adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in the first writing frame of at least part of writing frames, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted; when the sub-pixels are driven according to the final driving data to display the picture to be displayed, the brightness difference between the middle molecular display area of the first writing frame and the last holding frame of the last driving period is reduced, and the average value of the final driving data and the initial driving data of all writing frames corresponding to the sub-pixels in each sub-display area is smaller than a preset threshold value in one driving period, so that the brightness difference between the first writing frame and the last holding frame of the last driving period A is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of the picture to be displayed, and the display effect of the display panel is improved.
Optionally, at least part of the write frames further comprise a last write frame of the at least two write frames; in the last written frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the last written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted.
Referring to fig. 2 and 4, the last write frame writec is a write frame adjacent to the hold phase A2 in the present drive period a for the write phase A1. In the last writing frame writec, the adjustment modes of the partial sub-display area 11 and other sub-display areas 11 are different, that is, the initial driving data of the partial sub-display area 11 is reduced, the initial driving data of the partial sub-display area 11 is increased, and by setting the initial driving data of the partial sub-display area 11 to be reduced, when the partial sub-display area 11 displays the picture to be displayed, the brightness difference between the last writing frame writec and the holding phase A2 in the same driving period a is reduced, and because the average value of the final driving data and the initial driving data of all writing frames corresponding to the sub-pixels in each sub-display area 11 in one driving period a are smaller than the preset threshold value, the brightness difference between the writing phase A1 and the holding phase A2 in one driving period a is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of the picture to be displayed, so that the display effect of the display panel is further improved.
In the last write frame writec, the initial driving data of the partial sub-display area 11 is adjusted, the initial driving data of the partial sub-display area 11 is not adjusted, and the initial driving data of the partial sub-display area 11 may be reduced, and the partial sub-display area 11 is not adjusted; it is also possible that the initial driving data of the partial sub-display section 11 is increased and the initial driving data of the partial sub-display section 11 is not adjusted; it is also possible that the initial driving data of the partial sub-display section 11 is decreased, the initial driving data of the partial sub-display section 11 is not adjusted, and the initial driving data of the partial sub-display section 11 is increased. By setting the initial driving data of the sub-display area 11 of the last writing frame write to be not adjusted, the brightness difference between the sub-display area 11 and the holding phase A2 in the same driving period A is relatively reduced, and the average value of the final driving data of all writing frames corresponding to the sub-pixels in each sub-display area and the initial driving data in one driving period are smaller than the preset threshold value, so that the brightness difference between the writing phase A1 and the holding phase A2 in one driving period A is reduced on the premise that the display brightness superposition of a plurality of writing frames accords with the brightness of a picture to be displayed, and the display effect of the display panel is further improved.
Optionally, in each writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted; the adjustment modes of adjacent sub-display areas in each writing frame are different.
Specifically, in each writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted, so that each writing frame has smaller brightness difference from the holding stage of the previous driving period and the holding stage of the driving period, and the display effect of the display panel is further improved.
And the adjustment modes of the adjacent sub-display areas in each writing frame are different, namely if the initial driving data of one sub-display area is increased in the adjacent sub-display areas, the initial driving data of the other sub-display area is reduced or unchanged, so that the brightness alternation of each sub-display area in the same writing frame is ensured, the brightness difference between the writing frame and the maintaining stage is reduced, the picture brightness of the writing frame is more uniform, and the display panel is ensured to have better display effect.
Fig. 5 is a schematic diagram of a writing frame according to an embodiment of the present invention, and fig. 6 is a schematic diagram of another writing frame according to an embodiment of the present invention, and referring to fig. 5 and 6, a display panel may be divided into two or more sub-display areas, and initial driving data of the display panel is 200 gray scale.
Referring to fig. 5, the sub display area 11 includes a first sub display area 111 and a second sub display area 112, and the initial driving data of the first sub display area 111 may be increased to 202 gray scale in a first writing frame, the initial driving data of the second sub display area 112 may be decreased to 198 gray scale in a last writing frame, the initial driving data of the second sub display area 112 may be increased to 202 gray scale, and the initial driving data of the first sub display area 111 may be decreased to 198 gray scale, so that the average value of the final driving data of the two writing frames of the first sub display area 111 and the second sub display area 112 is 200 gray scale, and the difference between the initial driving data and the first writing frame is less than a preset threshold value, and the brightness difference between the first writing frame and the last driving period and the brightness difference between the last writing frame and the holding period of the driving period may be decreased while the display requirement is satisfied. And each sub-display area in the same writing frame is compensated alternately, the brightness is changed alternately, the brightness difference between the writing frame and the maintaining stage is reduced, the brightness of the picture of the writing frame is more uniform, and the display panel is ensured to have better display effect. It can be understood that the writing phase A1 in the present embodiment includes two writing frames, so that the brightness of the writing frames is more uniform. Specifically, the number of writing frames in the writing stage A1 may be set according to practical situations, which is not limited herein.
It will be appreciated that in other embodiments, the write phase A1 includes three write frames, the initial drive data being adjusted for decreasing in the first write frame, the initial drive data being adjusted for increasing in the second write frame, and the initial drive data being adjusted for decreasing in the third write frame.
Referring to fig. 6, the display panel may further include a division into a plurality of sub-display areas. The sub display area 11 includes a first sub display area 111, a second sub display area 112, a third sub display area 113, and a fourth sub display area 114. The initial driving data of the first sub-display area 111 and the third sub-display area 113 may be increased to 202 gray scales, the initial driving data of the second sub-display area 112 and the fourth sub-display area 114 may be reduced to 198 gray scales, the initial driving data of the second sub-display area 112 and the fourth sub-display area 114 may be increased to 202 gray scales in the last writing frame, the initial driving data of the first sub-display area 111 and the third sub-display area 113 may be reduced to 198 gray scales, and thus the average value of the final driving data of the two writing frames of the first sub-display area 111, the second sub-display area 112, the third sub-display area 113 and the fourth sub-display area 114 may be 200 gray scales, the difference between the initial driving data and the initial driving data may be smaller than the preset threshold, and the brightness difference between the first writing frame and the last driving period and the brightness difference between the last writing frame and the holding stage of the driving period may be reduced while the display requirements are satisfied. And each sub-display area in the same writing frame is compensated alternately, the brightness is changed alternately, the brightness difference between the writing frame and the maintaining stage is reduced, the brightness of the picture of the writing frame is more uniform, and the display panel is ensured to have better display effect.
Alternatively, fig. 7 is a schematic diagram of another display panel according to an embodiment of the present invention, and referring to fig. 2 and 7, a plurality of sub-display areas 11 are sequentially arranged along a row direction X or a column direction Y, or a plurality of sub-display areas 11 are arranged in an array.
Specifically, the display panel further includes a scan line for providing a scan signal to the sub-pixels, and a data line for providing driving data to the sub-pixels. The row direction X may be an extending direction of the scan lines, and the column direction Y may be an extending direction of the data lines, and the plurality of sub-display areas 11 are sequentially arranged along the row direction X or the column direction Y, so that driving difficulty of the display panel is reduced. Referring to fig. 5, the plurality of sub display areas 11 may be arranged in an array in which the plurality of sub display areas 11 are arranged in a row direction X and a column direction Y. The plurality of sub-display areas 11 are arranged in an array manner, so that the brightness difference between the writing stage and the holding stage is small, the brightness of a picture written in a frame is more uniform, and a display panel is ensured to have a better display effect.
Optionally, in the adjustment mode, the value increased when the initial driving data is increased is a first value, the value decreased when the initial driving data is decreased is a second value, and the first value and the second value are equal. By the arrangement, the adjustment difficulty of initial driving data of the display panel can be reduced, and the driving speed is improved.
Optionally, in one driving period, the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area is equal to the initial driving data. The arrangement is that the display brightness superposition of all the written frames of each sub-pixel is equal to the brightness of the picture to be displayed, so that the display panel is ensured to have higher picture display precision.
Fig. 8 is a driving timing diagram of a display panel according to another embodiment of the present invention, optionally, referring to fig. 8, each writing frame includes a light emitting sub-stage B1, a holding stage A2 includes at least two holding frames Skip, and each holding frame Skip includes the light emitting sub-stage B1;
driving the sub-pixels to display a picture to be displayed according to the final driving data, including:
driving the sub-pixels to emit light in an emitting sub-stage B1; in at least two writing frames, from the first writing frame write to the last writing frame write, the duration of the light emitting sub-stage B1 of each writing frame gradually increases, and the duration of the light emitting sub-stage B1 of the holding frame Skip is greater than the duration of the light emitting sub-stage B1 of the writing frame.
Specifically, both the driving current and the light-emitting duration can influence the display brightness of the sub-pixels, and the larger the driving current is, the larger the display brightness is, and the longer the light-emitting duration is, the larger the display brightness is. Since the frame Skip is kept from writing driving data into the sub-pixels, the driving unit in the driving circuit generates driving current according to the data voltage stored in the storage unit to drive the light emitting diode to emit light, and since the storage unit has leakage current, the data voltage stored in the storage unit is gradually attenuated when the frame Skip is kept, the driving current generated by the driving unit is reduced due to the attenuation of the data voltage stored in the storage unit, and the brightness of the light emitting diode is reduced, namely the display brightness of the sub-pixels is reduced. By setting the duration of the light emitting sub-stage B1 of the holding frame Skip to be longer than the duration of the light emitting sub-stage B1 of the writing frame, the display brightness of the sub-pixels in the holding frame Skip can be increased, the brightness difference between the holding frame Skip and the writing stage A1 is reduced, and by setting the duration of each writing frame light emitting sub-stage B1 to be gradually increased from the first writing frame write to the last writing frame write, the light emitting duration is gradually increased from the first writing frame write to the last writing frame write, and the sudden change of the light emitting duration in the holding stage A2 is avoided, thereby causing the sudden brightness change.
Optionally, the duration of the light emitting sub-phase B1 of at least part of the holding frames Skip increases gradually from the first holding frame Skip to the last holding frame Skip.
Specifically, in one driving period a, the farther from the holding frame Skip of the writing stage A1, the larger the data voltage attenuation stored in the storage unit will be, the smaller the driving current generated by the driving unit is, the smaller the display brightness of the sub-pixel is, the duration of the light emitting sub-stage B1 of at least part of the holding frame Skip is gradually increased, so that the longer the light emitting duration of the holding frame Skip of the writing stage A1 is, and the brightness difference between the holding frame Skip and the writing stage A1 is reduced.
The embodiment of the invention also provides a driving device of a display panel, and fig. 9 is a schematic diagram of the driving device of the display panel provided by the embodiment of the invention, referring to fig. 9, the display panel includes a display area, the display area includes at least two sub-display areas, and each sub-display area includes a plurality of sub-pixels; one driving period of the sub-pixel includes a writing phase and a holding phase, the writing phase including at least two writing frames;
the driving device includes:
an initial driving data determining module 210, configured to determine initial driving data of each sub-pixel in each writing frame according to the frame to be displayed;
the final driving data determining module 220 is configured to adjust initial driving data of at least part of the written frames in one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and reducing the initial driving data; at least a portion of the write frames includes a first of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
the driving module 230 is configured to drive the sub-pixels to display a picture to be displayed according to the final driving data.
Optionally, the at least partial write frame further includes a last write frame of the at least two write frames; and in the last written frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the last written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted.
Optionally, in each writing frame, the adjustment modes of a part of the sub-display areas and other sub-display areas are different, or the initial driving data of a part of the sub-display areas are adjusted, and the initial driving data of a part of the sub-display areas are not adjusted;
the adjustment modes of adjacent sub-display areas in each writing frame are different.
Optionally, the plurality of sub display areas are sequentially arranged along a row direction or a column direction, or the plurality of sub display areas are arranged in an array.
Optionally, in the adjustment manner, an increased value when the initial driving data is increased is a first value, and a decreased value when the initial driving data is decreased is a second value, where the first value and the second value are equal.
Optionally, in one driving period, the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area is equal to the initial driving data.
Optionally, each of the write frames includes a light emitting sub-phase, the hold phase includes at least two hold frames, and each of the hold frames includes a light emitting sub-phase;
driving the sub-pixels to display the picture to be displayed according to the final driving data, including:
driving the sub-pixels to emit light in the light emitting sub-stage; and the time length of the light-emitting sub-stage of each writing frame is longer than that of the light-emitting sub-stage of the writing frame.
Optionally, the duration of the light emitting sub-phase of at least part of the holding frames gradually increases from the first holding frame to the last holding frame in the at least two holding frames.
The driving device of the display panel provided by the embodiment of the invention and the driving method of the display panel provided by any embodiment of the invention belong to the same invention conception, have the same beneficial effects, and the detailed technical details of the embodiment are not shown in the driving method of the display panel provided by any embodiment of the invention.
The embodiment of the present invention further provides a display device, and fig. 10 is a schematic diagram of a display device provided in the embodiment of the present invention, and referring to fig. 10, a display device 100 includes a display panel 200 and a driving device 300 of the display panel according to any embodiment of the present invention. The display device 100 may be an electronic device such as a mobile phone or a tablet.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A driving method of a display panel, wherein the display panel comprises a display area, the display area comprises at least two sub-display areas, and each sub-display area comprises a plurality of sub-pixels; one driving period of the sub-pixel includes a writing phase and a holding phase, the writing phase including at least two writing frames;
the driving method includes:
determining initial driving data of each sub-pixel in each written frame according to a picture to be displayed;
adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and decreasing the initial driving data; the at least partial write frame includes a first write frame of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
and driving the sub-pixels to display the picture to be displayed according to the final driving data.
2. The method according to claim 1, characterized in that:
the at least partial write frame further includes a last write frame of the at least two write frames; and in the last written frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the last written frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted.
3. The method according to claim 1, characterized in that:
in each writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
the adjustment modes of adjacent sub-display areas in each writing frame are different.
4. The method according to claim 1, characterized in that:
the plurality of sub-display areas are sequentially arranged along the row direction or the column direction, or the plurality of sub-display areas are arranged in an array.
5. The method according to claim 1, characterized in that:
in the adjustment mode, the value increased when the initial driving data is increased is a first value, the value decreased when the initial driving data is decreased is a second value, and the first value and the second value are equal.
6. The method according to claim 1, characterized in that:
and in one driving period, the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area is equal to the initial driving data.
7. The method of claim 1, wherein each of the write frames includes a light-emitting sub-phase, the hold phase includes at least two hold frames, each of the hold frames includes a light-emitting sub-phase;
driving the sub-pixels to display the picture to be displayed according to the final driving data, including:
driving the sub-pixels to emit light in the light emitting sub-stage; and the time length of the light-emitting sub-stage of each writing frame is longer than that of the light-emitting sub-stage of the writing frame.
8. The method according to claim 7, wherein:
from the first holding frame to the last holding frame, the duration of the light emitting sub-phase of at least part of the holding frames gradually increases.
9. A driving device of a display panel, wherein the display panel comprises a display area, the display area comprises at least two sub-display areas, and each sub-display area comprises a plurality of sub-pixels; one driving period of the sub-pixel includes a writing phase and a holding phase, the writing phase including at least two writing frames;
the driving device includes:
the initial driving data determining module is used for determining initial driving data of each sub-pixel in each writing frame according to the picture to be displayed;
the final driving data determining module is used for adjusting initial driving data of at least part of the written frames of one driving period to obtain final driving data; in one driving period, the difference value between the average value of the final driving data of all the written frames corresponding to the sub-pixels in each sub-display area and the initial driving data of the sub-pixels is smaller than a preset threshold value; the adjustment mode of the initial driving data comprises the steps of increasing the initial driving data and decreasing the initial driving data; the at least partial write frame includes a first write frame of the at least two write frames; in the first writing frame, the adjustment modes of part of the sub-display areas and other sub-display areas are different, or in the first writing frame, the initial driving data of part of the sub-display areas are adjusted, and the initial driving data of part of the sub-display areas are not adjusted;
and the driving module is used for driving the sub-pixels to display the picture to be displayed according to the final driving data.
10. A display device comprising a display panel and the driving device of the display panel according to claim 9.
CN202211715579.0A 2022-12-29 2022-12-29 Driving method and driving device of display panel and display device Pending CN116129796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211715579.0A CN116129796A (en) 2022-12-29 2022-12-29 Driving method and driving device of display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211715579.0A CN116129796A (en) 2022-12-29 2022-12-29 Driving method and driving device of display panel and display device

Publications (1)

Publication Number Publication Date
CN116129796A true CN116129796A (en) 2023-05-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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