CN108877640B - Display panel and display panel driving method - Google Patents

Display panel and display panel driving method Download PDF

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CN108877640B
CN108877640B CN201811133101.0A CN201811133101A CN108877640B CN 108877640 B CN108877640 B CN 108877640B CN 201811133101 A CN201811133101 A CN 201811133101A CN 108877640 B CN108877640 B CN 108877640B
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pixel
sub
gray scale
color
pixel unit
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CN108877640A (en
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董杭
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BOE Technology Group Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • 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]

Abstract

The disclosure provides a display panel and a display panel driving method, and belongs to the technical field of display panels. The display panel comprises a plurality of pixel units, and each pixel unit at least comprises two sub-pixels of a first color; any one of the sub-pixels comprises at least one sub-pixel which independently emits light; the display panel driving method includes: in each display period, acquiring a target gray scale of the first color in the pixel unit; in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period; wherein, in the adjacent display periods, the gray scale of any one of the sub-pixels is different. The display panel driving method can improve the display effect and the service life of the display panel.

Description

Display panel and display panel driving method
Technical Field
The present disclosure relates to the field of display panel technologies, and in particular, to a display panel and a display panel driving method.
Background
With the continuous development of display technology, OLED display panels are widely used. When the OLED part area displays a fixed picture for a long time, the burn-in phenomenon is easy to generate, and the display effect and the service life of the screen are influenced.
In the prior art, the OLED burn-in phenomenon is improved by driving methods such as integral pixel translation and alternate light emission of adjacent pixels, however, these methods have a limited application range and may reduce the display effect of the display panel.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a display panel and a driving method of the display panel, which can improve the display effect and the lifetime of the display panel.
According to a first aspect of the present disclosure, there is provided a display panel driving method; the display panel comprises a plurality of pixel units, and each pixel unit at least comprises two sub-pixels of a first color; any one of the sub-pixels comprises at least one sub-pixel which independently emits light;
the display panel driving method includes:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
wherein, in the adjacent display periods, the gray scale of any one of the sub-pixels is different.
In an exemplary embodiment of the present disclosure, the pixel units are arranged in at least one row, and each of the pixel units in the same row of the pixel units is adjacent to each other in sequence;
in the same row of the pixel units, one sub-pixel of one pixel unit and one sub-pixel of the adjacent pixel unit are the same sub-pixel.
In an exemplary embodiment of the present disclosure, any one of the sub-pixels includes only one of the sub-pixels;
in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure BDA0001814050190000021
In each display period, controlling each sub-pixel to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling the ith sub-pixel to emit light at the 1+ mn frame, wherein the gray scale of the ith sub-pixel at the 1+ mn frame is
Figure BDA0001814050190000022
Figure BDA0001814050190000023
Wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, b is more than or equal to 0 and less than or equal to 1, and a is not equal to b not equal to 0.5;
Figure BDA0001814050190000024
in one exemplary embodiment of the present disclosure, n is 1, 2, 3, 4, or 5.
In one exemplary embodiment of the present disclosure, 0.1< | a-b | < 0.3.
In one exemplary embodiment of the present disclosure, a is 0.4 and b is 0.2; alternatively, a is 0.6 and b is 0.8.
In one exemplary embodiment of the present disclosure, a ═ b ═ 1; alternatively, a ═ b ═ 0.
In an exemplary embodiment of the present disclosure, only two pixel units are included in the pixel unit of the same column, and two sub-pixels are shared by two pixel units; two sub-pixels are adjacently arranged;
Figure BDA0001814050190000025
in one exemplary embodiment of the present disclosure, a ═ b ═ 1; alternatively, a ═ b ═ 0.
In an exemplary embodiment of the present disclosure, any one of the sub-pixels includes two adjacent sub-pixels;
in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure BDA0001814050190000031
In each display period, controlling each sub-pixel to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling two sub-pixels of the ith sub-pixel to respectively emit light in the 1+ mn frames, wherein the gray scale of the 1 st sub-pixel of the ith sub-pixel in the 1+ mn frames is
Figure BDA0001814050190000032
The gray scale of the 2 nd sub-pixel of the ith sub-pixel in the 1+ mn frame is
Figure BDA0001814050190000033
So that
Figure BDA0001814050190000034
Wherein the content of the first and second substances,
Figure BDA0001814050190000035
wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, and b is more than or equal to 0 and less than or equal to 1;
Figure BDA0001814050190000036
in one exemplary embodiment of the present disclosure,
Figure BDA0001814050190000037
Figure BDA0001814050190000038
in one exemplary embodiment of the present disclosure,
Figure BDA0001814050190000041
Figure BDA0001814050190000042
in one exemplary embodiment of the present disclosure, x is 0 or 1.
According to a second aspect of the present disclosure, there is provided a display panel, the display panel comprising a plurality of pixel units, each of the pixel units comprising at least two sub-pixels of a first color, each of the sub-pixels comprising at least one sub-pixel emitting light independently; the display panel further includes a driving circuit for:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
wherein, in the adjacent display periods, the gray scale of any one of the sub-pixels is different.
The display panel driving method provided by the present disclosure equates a target gray scale of a first color in a pixel unit to a sum of gray scales of two portions emitting light; the gray scales of the two sub-pixels can be synthesized into the gray scale of the first color of the pixel unit by respectively controlling the luminous gray scales of the two sub-pixels of the pixel unit; because the gray scale of each sub-pixel of the two sub-pixels in the adjacent display periods is changed, the first color of the pixel unit of the display panel presents the target gray scale by means of afterglow effect, and normal display of the picture is realized. In two adjacent display periods, the gray scales of the sub-pixels are changed, so that the accelerated aging of the same sub-pixel caused by maintaining the same gray scale for a long time is avoided, the problem that the sub-pixels are aged and finally burn in a screen when the display panel displays the same picture for a long time is solved, the display effect of the display panel is improved, and the service life of the display panel is prolonged.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a display area of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a pixel group according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a pixel group according to an embodiment of the disclosure.
Fig. 4 is a schematic structural diagram of a pixel group according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a display area of a display panel according to an embodiment of the present disclosure.
Fig. 6 is a schematic structural diagram of a display area of a display panel according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of a display area of a display panel according to an embodiment of the present disclosure.
The reference numerals of the main elements in the figures are explained as follows:
100. a pixel group; 1. a pixel unit; 11. b sub-pixel, 12, R sub-pixel, 13, G sub-pixel; 210. a first pixel unit; 211. a first B sub-pixel of the first pixel unit; 212. a second B sub-pixel of the first pixel unit; 220. a second pixel unit; 221. a first B sub-pixel of the second pixel unit; 222. a second B sub-pixel of the second pixel unit; 230. a third pixel unit; 231. a first B sub-pixel of a third pixel unit; 232. a second B sub-pixel of the third pixel unit; 310. a first RGB pixel; 311. a B1 sub-pixel; 312. an R1 sub-pixel; 313. a G1 sub-pixel; 320. a second RGB pixel; 321. a B2 sub-pixel; 322. an R2 sub-pixel; 323. a G2 sub-pixel; 330. a third RGB pixel; 331. a B3 sub-pixel; 332. an R3 sub-pixel; 333. a G3 sub-pixel; 341. a B4 sub-pixel; 410. a virtual first pixel; 420. a virtual second pixel; 510. a virtual third pixel; 520. a virtual fourth pixel; 6. an auxiliary sub-pixel; 710. a pixel unit; 711. a sub-pixel; 720. a pixel unit; 721. a sub-pixel; 810. a pixel unit; 811. a sub-pixel; 8111. a sub-pixel; 8112. a sub-pixel; 820. a pixel unit; 821. a sub-pixel; 8211. a sub-pixel; 8212. a sub-pixel; 830. a pixel unit; 831. a sub-pixel; 8311. a sub-pixel; 8312. a sub-pixel; 841. a sub-pixel; 8411. a sub-pixel; 8412. a sub-pixel.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.
The present disclosure provides a display panel driving method for controlling a display frame of a display panel and improving a residual image phenomenon of the display panel, and particularly for improving a long-term illumination of the same frame by a display device. The display panel may be an OLED display panel, an LCD display panel, a plasma display panel, or the like.
As shown in fig. 1, the display panel includes a plurality of pixel units 1, and each pixel unit 1 includes at least two sub-pixels of a first color; any one of the sub-pixels comprises at least one sub-pixel which independently emits light;
the display panel driving method includes:
s110, in each display period, acquiring a target gray scale of a first color in the pixel unit 1;
s120, in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
wherein, in the adjacent display periods, the gray scale of any one of the sub-pixels is different.
The display panel driving method provided by the present disclosure equates a target gray scale of a first color in a pixel unit 1 to a sum of gray scales of two portions of light emission; the gray scales of the two sub-pixels of the pixel unit 1 can be synthesized into the gray scale of the first color of the pixel unit 1 by respectively controlling the luminous gray scales of the two sub-pixels; because the gray scale of each sub-pixel of the two sub-pixels in the adjacent display periods changes, the first color of the pixel unit 1 of the display panel presents the target gray scale by means of afterglow effect, and normal display of the picture is realized. In two adjacent display periods, the gray scales of the sub-pixels are changed, so that the accelerated aging of the same sub-pixel caused by maintaining the same gray scale for a long time is avoided, the problem that the sub-pixels are aged and finally burn in a screen when the display panel displays the same picture for a long time is solved, the display effect of the display panel is improved, and the service life of the display panel is prolonged.
The following describes in detail the steps and application environment of the display panel driving method according to the embodiment of the present disclosure with reference to the accompanying drawings:
as shown in fig. 1, the display panel may include a plurality of pixel units 1, and each pixel unit 1 may be composed of at least one sub-pixel capable of emitting at least one color. The number of colors that can be emitted by the sub-pixels in each pixel unit 1, the number of sub-pixels emitting the same color, and the position arrangement relationship of each sub-pixel are not particularly limited in the embodiments of the present disclosure. For example, the display panel may be a monochrome display panel, an RGB display panel, an RGBW display panel, or the like. The pixel units 1 of the display panel may be arranged in a long strip shape (as shown in fig. 1), may be arranged in a diamond shape (as shown in fig. 6), or may have other pixel structures.
In the same pixel unit 1, the number of the sub-pixels of the first color is two, and the two sub-pixels are respectively a first sub-pixel and a second sub-pixel. The first sub-pixel and the second sub-pixel may be completely and independently owned and used by the pixel unit 1, or may share the same sub-pixel with the first sub-pixel or the second sub-pixel in the adjacent pixel unit 1, and the same sub-pixel may refer to one sub-pixel which is integrated, can emit light of the first color, is controlled by the same control signal, and emits light synchronously, or may refer to a plurality of sub-pixels which are adjacent in position, can emit light of the first color, are controlled by different signals, and respectively emit light independently.
Taking the display panel as an RGB display panel as an example, each pixel unit 1 includes an R sub-pixel 12 capable of emitting R (red) light, a G sub-pixel 13 capable of emitting G (green) light, and a B sub-pixel 11 capable of emitting B (blue) light, wherein the number of at least one of the R sub-pixel 12, the G sub-pixel 13, and the B sub-pixel 11 is two or more. The relationship between the first B sub-pixel and the second B sub-pixel emitting blue light will be described by taking the number of only the B sub-pixels 11 in the pixel unit 1 as two.
In one embodiment, each pixel unit 1 may include therein one R sub-pixel 12, one G sub-pixel 13, and first and second B sub-pixels which are completely owned by it and are not shared with the adjacent pixel unit 1, and the four sub-pixels are independently controlled to emit light, respectively. Therefore, when the blue light of the pixel unit 1 has the same gray scale in two display periods, the light emitting intensities of the first B sub-pixel and the second B sub-pixel can be adjusted, so that the gray scale of the first B sub-pixel and the gray scale of the second B sub-pixel are changed and the sum of the gray scales is maintained as the target gray scale of the blue light.
In another embodiment, each pixel unit 1 may include one R sub-pixel 12, one G sub-pixel 13, and one B sub-pixel 11 shared with the adjacent pixel unit 1, which are completely owned by the pixel unit 1 and are not shared with the adjacent pixel unit 1, the B sub-pixel 11 may serve as a first B sub-pixel of the pixel unit 1, and the B sub-pixel 11 of the adjacent pixel unit 1 may serve as a second sub-pixel of the pixel unit 1. In other words, each pixel unit 1 may be considered as a combination of one RGB pixel and the B sub-pixel 11 of the adjacent RGB pixel in terms of form. When the B sub-pixel 11 emits light, the gray scale thereof may be equivalent to the sum of the gray scale of the first B sub-pixel as the pixel unit 1 where the B sub-pixel is located and the gray scale of the second B sub-pixel as the adjacent pixel unit 1. In other words, the target gray scale of the blue light B of the pixel unit 1 can be divided into two parts according to the predetermined weight, one part is assumed by the B sub-pixel (which can be regarded as the first B sub-pixel) of the pixel unit 1, and the other part is assumed by the B sub-pixel 11 (which can be regarded as the second B sub-pixel) of the adjacent pixel unit 1; accordingly, the gray scale of each B pixel is an equivalent value of the gray scale of the first B sub-pixel as one pixel unit 1 and the gray scale of the second B sub-pixel as another pixel unit 1, and the equivalent value can be obtained by a sum operation of the two gray scales or other operation methods.
As shown in fig. 1 and 2, each pixel unit 1 includes one R sub-pixel 12, one G sub-pixel 13, and one B sub-pixel 11, for example, in which a plurality of RGB pixels are arranged adjacently in the same row.
The first pixel unit 210 includes a first RGB pixel 310(B1 subpixel 311, R1 subpixel 312, G1 subpixel 313) and a B2 subpixel 321 of a second RGB pixel 320, the B1 subpixel 311 is the first B subpixel 211 of the first pixel unit, and the B2 subpixel 321 is the second B subpixel 212 of the first pixel unit.
The second pixel unit 220 includes a second RGB pixel 320(B2 sub-pixel 321, R2 sub-pixel 322, G2 sub-pixel 323) and a B3 sub-pixel 331 of the third RGB pixel 330, the B2 sub-pixel 321 is the first B sub-pixel 221 of the second pixel unit, and the B3 sub-pixel 331 is the second B sub-pixel 222 of the second pixel unit.
The third pixel unit 230 includes a third RGB pixel 330(B3 subpixel 331, R3 subpixel 332, G3 subpixel 333) and a B4 subpixel 341, the B3 subpixel 331 being the first B subpixel 231 of the third pixel unit, and the B4 subpixel 341 being the second B subpixel 232 of the third pixel unit.
The pixel units 1 on the display panel may be arranged in at least one row, and each row of the pixel units 1 may be defined as a pixel group 100. Each of the pixel groups 100 may include a plurality of pixel units 1 sequentially adjacently arranged in the first direction. The first direction may be a transverse direction, a longitudinal direction or other directions of the display panel, and the direction may be determined according to the distribution relationship of the pixel units 1. It is clear to the skilled person that one pixel group 100 may be part or all of all the pixel units 1 on the same straight line of the display panel; furthermore, two or more pixel groups 100 may be adjacently or intermittently disposed on the same straight line along the first direction of the display panel.
The range of each pixel group 100 may be preset and burned into an IC (integrated circuit) of the display panel, or the IC may calculate and divide the range according to the range of a still picture (a picture that remains unchanged within a preset display period length) of the display panel.
Each sub-pixel of the first color may include one or more sub-pixels that independently emit light. In the following, the display panel driving method of the present disclosure is explained and explained by taking as an example that only one sub-pixel is included in each sub-pixel.
Marking the ith pixel unit 1 in the same pixel group as a pixel unit SiMarking the pixel cell SiThe first sub-pixel and the second sub-pixel are respectively the first sub-pixel Pi1And a second sub-pixel Pi2. Marking the sub-pixel of the ith first color in the same pixel group as Pi(ii) a Due to the sub-pixel PiOnly one sub-pixel is included, and thus, in this embodiment, the sub-pixel and the sub-pixel may be regarded as equivalent concepts. Thus, the sub-pixel P can be markediThe corresponding sub-pixel is Pi. Sub-pixel PiCan be controlled to emit light of a first color, its gray scale and sub-pixel PiThe gray levels of (a) and (b) are the same.
Pixel unit SiAnd a pixel unit Si-1 Two pixel units 1 adjacent to each other in the same pixel group 100; sub-pixel PiCan be used as a pixel unit SiAnd as a pixel unit Si-1The second sub-pixel of (1).
Then in step S110, the pixel cell S may be calculatediTarget Gray level of the first color at 1+ mn frame
Figure BDA0001814050190000091
Wherein, 1+ mn represents the 1+ m display period (m is a natural number), n represents the number of frames of the difference between two adjacent display periods, and n is a positive integer.
In step S120, the sub-pixel P is controlledi(i.e. the sub-pixel P)i) Emitting light at 1+ n frame, wherein the sub-pixel Pi(i.e. the sub-pixel P)i) The gray scale at the 1+ mn frame is
Figure BDA0001814050190000092
Figure BDA0001814050190000093
a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, b is more than or equal to 0 and less than or equal to 1, and a is not equal to b not equal to 0.5;
Figure BDA0001814050190000094
thus, the sub-pixel Pi(i.e. the sub-pixel P)i) The gray scale of (a) can be equivalent to the gray scale of two different sub-pixels, i.e. it can be equivalent to: pixel unit SiTarget gray scale of the first sub-pixel and the previous adjacent pixel unit Si-1The target gray scale of the second sub-pixel.
How this driving method achieves normal display of a picture will now be explained and explained taking as an example the first three display periods of the first 3 pixel units 1 of the pixel group 100 having not less than 3 pixel units 1. Wherein, the difference between adjacent display periods is 1 frame, that is, n is 1; please see table 1:
when m is 0, in step S110, the display period is the 1 st display period, and the displayed frame is the 1 st frame; at this time, the pixel unit S1The target gray scale of the first color is
Figure BDA0001814050190000101
Pixel unit S2The target gray scale of the first color is
Figure BDA0001814050190000102
Pixel unit S3The target gray scale of the first color is
Figure BDA0001814050190000103
In step S120, a sub-pixel P1(i.e. the sub-pixel P)1) Gray scale of
Figure BDA0001814050190000104
Which can be equivalent to a pixel cell S1First sub-pixel P of11Gray scale of
Figure BDA0001814050190000105
Sub-pixel P2(i.e. the sub-pixel P)2) Gray scale of
Figure BDA0001814050190000106
Which can be equivalent to a pixel cell S2First sub-pixel P of21Gray scale of
Figure BDA0001814050190000107
And a pixel unit S1Second sub-pixel P12Gray scale of
Figure BDA0001814050190000108
Sub-pixel P3I.e. (sub-pixel P)3) Gray scale of
Figure BDA0001814050190000109
Which can be equivalent to a pixel cell S3First sub-pixel P of31Gray scale of
Figure BDA00018140501900001010
And a pixel unit S2Second sub-pixel P22Gray scale of
Figure BDA00018140501900001011
Thus, the pixel unit S1First sub-pixel P of11Gray scale of
Figure BDA00018140501900001012
And a pixel unit S1Second sub-pixel P12Gray scale of
Figure BDA00018140501900001013
The sum of which is the pixel unit S1The target gray scale of the first color is
Figure BDA00018140501900001014
Similarly, the pixel unit S2The target gray scale of the first color is also achieved; pixel unit S3Through the pixel unit S4The target gray scale is realized by matching, and by analogy, the first color of each pixel unit 1 of the pixel group 100 reaches the target gray scale.
According to the same algorithm and logic, the gray levels of each sub-pixel and the equivalent gray levels of the two sub-pixels can be obtained when m is 1 and m is 2, and the results are shown in table 1 and will not be described in detail.
Table 1: sub-pixel Pi(i.e. the sub-pixel P)i) Gray scale (n ═ 1)
Figure BDA00018140501900001015
As can be known from table 1, if the image displayed by the pixel group 100 is a still image, i.e. the color displayed by each pixel unit 1 in each display period is the same, for any sub-pixel, such as the sub-pixel P1The gray scale displayed by the LED display panel fluctuates and cannot be fixedly displayed, so that the aging speed of components is reduced. Furthermore, in the alternate display of different display periods, the distribution coefficients of the gray scale of the first color of the same pixel unit 1 in the adjacent two sub-pixels are alternately performed, and by virtue of an afterglow effect, it is difficult for a viewer to observe that the first color is distributed to the two different sub-pixels and is visually equivalent to each sub-pixelThe pixel displays the target gray scale of the first color of the corresponding pixel unit 1.
Furthermore, even if the color displayed by the pixel group 100 in the same frame is the same, i.e. the gray scale of the first color of each pixel unit 1 is the same, according to the driving method of the present disclosure, each sub-pixel is different in different display periods. For example, based on the example shown in table 1, the still picture is a monochrome picture, the target gray scale of the first color of each pixel unit 1 corresponding to the monochrome is X, and each sub-pixel P shown in table 1iThe gray levels of (A) can be calculated as shown in Table 2.
Table 2: sub-pixel Pi(i.e. the sub-pixel P)i) Gray scale (n ═ 1)
i＝1 i＝2 i＝3
m＝0 a*X (1-a+b)*X (1+a-b)*X
m＝1 (1-a)X (1+a-b)*X (1-a+b)*X
m＝2 a*X (1-a+b)*X (1+a-b)*X
In order to ensure afterglow effect and display effect of the display panel, the difference of the frame number between two adjacent display periods is not more than 5. In order to ensure the optimal display effect, in one embodiment, the frame number n between two adjacent display periods is equal to 1.
The preset weighting coefficients a and b can both be greater than 0.5 or both be less than 0.5, so that the situation that the high gray scale parts of the first colors of the two adjacent pixel units 1 are distributed to the same sub-pixel can be avoided, the situation that the sub-pixel still cannot meet the gray scale requirements of the two adjacent sub-pixels under the maximum luminous intensity is avoided, and the display effect of the display panel is ensured.
The preset weight coefficients a and b may have a small difference, for example, 0.1< | a-b | < 0.3. The specific values of the preset weighting coefficients a and b can be obtained by methods such as analog calculation, or can be directly set by technicians. The preset weighting coefficients a and b can be transformed at the starting points of different display periods and the starting points of different pixel groups 100. For example, in one embodiment, a is 0.4 and b is 0.2; when the start value of the display period is shifted by one display period, a is 0.6 and b is 0.8. When the transformation of the pixel unit 1 of the pixel group 100 is shifted by one unit, the values of the preset weight coefficients a and b may be exchanged.
In order to simplify the driving method, when the still picture in which the pixel group 100 is located is not a pure color picture, that is, when the target gray scales of the first colors of the two adjacent pixel units 1 are different, the preset weighting coefficients a and b may be changed so that a-b-1 or a-b-0 is provided, thereby achieving the purpose of simplifying the driving algorithm. For example, based on the example shown in table 1, when a equals 1 or b equals 1, each subpixel P shown in table 1 is selectedi(i.e. the sub-pixel P)i) The gray levels of (A) can be calculated as shown in Table 3.
Table 3: sub-pixel PiGray scale (n ═ 1)
Figure BDA0001814050190000121
As can be seen from Table 3, the sub-pixel PiAlternate display pixel cell SiThe gray scale of the first color and the pixel unit Si-1The gray scale of the first color. Since the target gray levels of the first color of two adjacent pixel units 1 are different, the sub-pixel PiThe gray scales in different display periods are different, so that the aging of related devices is slowed down, and the risk of screen burning is reduced.
In terms of display effect, the simplified driving method is equivalent to that in two adjacent display periods, a picture displayed by the display screen is translated by a distance of one sub-pixel in the first direction, and the distance is very small relative to human eyes so as to be imperceptible, thereby achieving the purpose of normally displaying the picture.
The explanation will now be given taking the display panel as an RGB display panel and blue as the first color. As shown in FIG. 3, in frame 1, the gray level of the B1 sub-pixel 311 is
Figure BDA0001814050190000122
The B2 sub-pixel 321 has a gray scale of
Figure BDA0001814050190000123
Thus, the B1 sub-pixel 311, the R1 sub-pixel 312, and the G1 sub-pixel 313 are considered to form a virtual first pixel 410; the B2 sub-pixel 321, the R2 sub-pixel 322, and the G2 sub-pixel 323 form a virtual second pixel 420.
As shown in FIG. 4, in the 2 nd frame, the gray scale of the B1 sub-pixel 311 is 0, and the gray scale of the B2 sub-pixel 321 is 0
Figure BDA0001814050190000124
The B3 sub-pixel 331 has a gray level of
Figure BDA0001814050190000125
Thus, the B2 sub-pixel 321, the R1 sub-pixel 312, and the G1 sub-pixel 313 are considered to form a virtual third pixel 510; b3 sub-pixel 331, R2 sub-pixel 322, G2The sub-pixels 323 constitute a virtual fourth pixel 520.
The virtual third pixel 510 and the virtual fourth pixel 520 are shifted by a sub-pixel distance in the first direction with respect to the virtual first pixel 410 and the virtual second pixel 420. It can be easily deduced that during successively different display periods a virtual pixel will alternately comprise one of the two adjacent B sub-pixels 11, such that the virtual pixel appears to be shifted back and forth by one sub-pixel in the first direction.
Since the sub-pixels and the pixels in the conventional display panel are arranged in a one-to-one correspondence, the pixel unit 1 at the edge of the display area of the display panel has no second sub-pixel along the first direction. In this regard, in an embodiment, it may be considered to lose the second sub-pixel of the end pixel unit 1, output only the driving signal or set the signal to 0 in the driving method or not output the corresponding driving signal. Since the pixel unit 1 is located at the edge of the AA region, the loss of the light emitting intensity of the first color has little influence on the display of the picture. In another embodiment, as shown in fig. 2, a row of auxiliary sub-pixels 6 emitting the first color light may be added at the edge of the AA area as the second sub-pixel of the adjacent pixel unit 1. Of course, it will be understood by those skilled in the art that when multiple colors are driven using the present disclosure, then each color may be provided with a corresponding auxiliary subpixel.
In some pixel arrangements, as shown in fig. 5, two adjacent pixel units 710, 720 share two first color sub-pixels 711, 721, and the two adjacent first color sub-pixels 711, 721 are disposed adjacent to each other, then the two pixel units 710, 720 may be divided into one pixel group 100, and the two pixel units may be previous pixel units of each other. Thus, the two pixel units 710 and 720 can be defined as the 1 st pixel unit 710 and the 2 nd pixel unit 720, the two first color sub-pixels 711 and 721 are the 1 st first color sub-pixel 711 and the 2 nd first color sub-pixel 721, respectively, and the previous sub-pixel of the 1 st pixel unit 710 is the 0 th pixel unit and actually is the 2 nd pixel unit 720. Therefore, according to thisThe driving method disclosed in this disclosure can directly set the gray levels of the two first color sub-pixels 711 and 721 in the 1+ mn frame
Figure BDA0001814050190000131
Likewise, in order to simplify the algorithm, when the gray scales of the sub-pixels 711 and 721 of the first color are different, a-b-1 or a-b-0 may be made. In terms of display effect, in the pixel group 1 sharing two sub-pixels of the first color adjacently arranged, the first color of one pixel unit 1 can be regarded as being alternately generated by the first sub-pixel of itself and the first sub-pixel of the other side. It is clear to those skilled in the art that when a pixel is located at an edge of a display area of a display panel, a sub-pixel capable of emitting a first color may be additionally disposed adjacent to the pixel, the sub-pixel and the pixel form a pixel unit 1, and the sub-pixel of the pixel unit 1 and the second sub-pixel are caused to alternately emit light to achieve a target gray scale of the first color.
In another embodiment, the sub-pixel of the first color may further include a plurality of sub-pixels emitting light independently, and when the display panel is driven to operate, the gray scale of each sub-pixel in different display periods may be changed, so as to avoid the sub-pixels from being damaged.
In the following, the driving method of the present disclosure is explained and explained by taking as an example that the sub-pixel includes two sub-pixels, and referring to the principles and methods described in the above embodiments in which one sub-pixel includes only one sub-pixel. As shown in fig. 7, the pixel units 810, 820, and 830 may be arranged in at least one row along the first direction, the pixel units 810, 820, and 830 in one row are sequentially adjacent, and the adjacent pixel units share one sub-pixel. Each sub-pixel includes two sub-pixels, and the two sub-pixels are adjacently disposed. For example, pixel unit 810 includes sub-pixel 811 and sub-pixel 821, pixel unit 820 includes sub-pixel 821 and sub-pixel 831, and pixel unit 830 includes sub-pixel 831 and sub-pixel 841, such that adjacent pixel units 810 and 820 share sub-pixel 821 and adjacent pixel units 820 and 830 share sub-pixel 831. Each subpixel includes two subpixels, e.g., subpixel 811 includes subpixel 8111 and subpixel 8112, subpixel 821 includes subpixel 8211 and subpixel 8212, subpixel 831 includes subpixel 8311 and subpixel 8312, and subpixel 841 includes subpixel 8411 and subpixel 8412. The arrangement direction of the two sub-pixels in the same sub-pixel may be perpendicular to the first direction (i.e., the direction in which the pixel units are arranged).
In the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure BDA0001814050190000141
In each display period, controlling each sub-pixel to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling two sub-pixels of the ith sub-pixel to respectively emit light in the 1+ mn frames, wherein the gray scale of the 1 st sub-pixel of the ith sub-pixel in the 1+ mn frames is
Figure BDA0001814050190000142
The gray scale of the 2 nd sub-pixel of the ith sub-pixel in the 1+ mn frame is
Figure BDA0001814050190000143
So that
Figure BDA0001814050190000144
Wherein the content of the first and second substances,
Figure BDA0001814050190000151
wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, and b is more than or equal to 0 and less than or equal to 1;
Figure BDA0001814050190000152
when the 1 st sub-pixel of the ith sub-pixel and the 2 nd sub-pixel of the ith sub-pixel are driven to independently emit light, a plurality of different driving modes can be adopted, and finally, the sum of the gray scales of the two sub-pixels is the gray scale of the sub-pixel.
In one embodiment, two sub-pixels can be regarded as independent sub-pixels in two adjacent pixel units, respectively, since the gray scale of the ith sub-pixel is the sum of two gray scales: the target gray scale of the first color of the ith pixel unit is allocated to the part of the ith sub-pixel according to the preset weight, and the target gray scale of the first color of the (i-1) th pixel unit is allocated to the part of the ith sub-pixel according to the preset weight. Therefore, one of the sub-pixels of the ith sub-pixel may be made to display a portion to which the target gray scale of the first color of the ith pixel unit is assigned to the ith sub-pixel according to the preset weight thereof, and the other sub-pixel may be made to display a portion to which the target gray scale of the first color of the (i-1) th pixel unit is assigned to the ith sub-pixel according to the preset weight thereof. In order to avoid that the light-emitting gray scale of one sub-pixel is kept unchanged for a long time when the sub-pixel corresponds to one pixel unit for a long time, two sub-pixels can alternately correspond to two adjacent pixel units in adjacent display periods respectively.
For example:
Figure BDA0001814050190000153
Figure BDA0001814050190000154
in another embodiment, two sub-pixels in the same sub-pixel may assign the light emitting intensity according to a preset weight, rather than according to the corresponding pixel unit. For example, in one embodiment, the first and second electrodes,
Figure BDA0001814050190000155
in order to avoid the long-term high light intensity of one sub-pixel and the damage of another sub-pixel caused by the long-term execution of the same preset weight, the preset weight can be changed into an adjustable part. For example, the preset weight of one sub-pixel alternates between x and 1-x, and the preset weight of the other sub-pixel alternates between 1-x and x in two adjacent display periods. For example, when the initial weight of the 1 st sub-pixel of the ith sub-pixel is x, then:
Figure BDA0001814050190000161
Figure BDA0001814050190000162
it is understood that, by changing the initial weight of the 1 st sub-pixel of the ith sub-pixel, the gray scale of each sub-pixel is different.
According to the above companies, it can be seen that the gray scale of one sub-pixel can be associated with the target gray scale of the first color of two adjacent pixel units and adjusted by three different weighting coefficients. Even if the area where the pixel unit is located displays a still picture for a long time, even if the displayed still picture is a pure-color picture, the gray scale of each sub-pixel can be changed in different display periods through the adjustment of different weight coefficients, and the picture effect is not changed.
It is clear to those skilled in the art that when the pixel unit 1 includes sub-pixels of a plurality of colors, the display panel driving method provided by the present disclosure may be used for driving of one of the colors or common driving of a plurality of colors. It should also be clear to the skilled person that the display panel driving method of the present disclosure may be used to drive not only the whole display panel, but also to implement the driving of the local area, and the specific driving method, weighting factor, etc. may be selected according to the picture condition (such as whether it is a local still picture, whether it is a local monochrome picture, etc.) displayed by the display panel.
The present disclosure also provides a display panel, which includes a plurality of pixel units 1, and each of the pixel units 1 at least includes two sub-pixels of a first color, and any of the sub-pixels includes at least one sub-pixel that independently emits light; the display panel further includes a driving circuit for:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
wherein, in the adjacent display periods, the gray scale of any one of the sub-pixels is different.
In each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period; in the adjacent display periods, specific details and implementation manners of "any of the sub-pixels have different gray scales" are the same as those described in the above embodiment of the display panel driving method, and therefore the display panel has the beneficial effects described in the above embodiment of the display panel driving method, and details of the disclosure are not repeated herein.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.

Claims (13)

1. A display panel driving method is characterized in that the display panel comprises a plurality of pixel units, and each pixel unit at least comprises two sub-pixels of a first color; any one of the sub-pixels comprises only one sub-pixel which independently emits light; the pixel units are arranged in at least one row, and the pixel units in the same row are adjacent in sequence; in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
the display panel driving method includes:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
in the adjacent display periods, the gray scale of any sub-pixel is different;
wherein, in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure FDA0003189621710000011
Wherein, in each of the display periods, controlling each of the sub-pixels to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling the ith sub-pixel to emit light at the 1+ mn frame, wherein the gray scale of the ith sub-pixel at the 1+ mn frame is
Figure FDA0003189621710000012
Figure FDA0003189621710000013
Wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, b is more than or equal to 0 and less than or equal to 1, and a is not equal to b not equal to 0.5;
Figure FDA0003189621710000014
2. the driving method according to claim 1, wherein n is 1, 2, 3, 4, or 5.
3. The driving method according to claim 1, characterized in that 0.1< | a-b | < 0.3.
4. The driving method according to claim 1, wherein a is 0.4 and b is 0.2; alternatively, a is 0.6 and b is 0.8.
5. The driving method according to claim 1, wherein a-b-1; alternatively, a ═ b ═ 0.
6. The driving method according to claim 1, wherein only two pixel units are included in the same column of pixel units, and two of the pixel units share two of the sub-pixels; two sub-pixels are adjacently arranged;
Figure FDA0003189621710000021
7. the driving method according to claim 6, wherein a-b-1; alternatively, a ═ b ═ 0.
8. A display panel driving method is characterized in that the display panel comprises a plurality of pixel units, and each pixel unit at least comprises two sub-pixels of a first color; any one of the sub-pixels comprises two adjacent sub-pixels which independently emit light; the pixel units are arranged in at least one row, and the pixel units in the same row are adjacent in sequence;
in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
the display panel driving method includes:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period;
in the adjacent display periods, the gray scale of any sub-pixel is different;
wherein, in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure FDA0003189621710000022
Wherein, in each of the display periods, controlling each of the sub-pixels to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling two sub-pixels of the ith sub-pixel to respectively emit light in the 1+ mn frames, wherein the gray scale of the 1 st sub-pixel of the ith sub-pixel in the 1+ mn frames is
Figure FDA0003189621710000023
The gray scale of the 2 nd sub-pixel of the ith sub-pixel in the 1+ mn frame is
Figure FDA0003189621710000024
So that
Figure FDA0003189621710000025
Wherein the content of the first and second substances,
Figure FDA0003189621710000031
wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, and b is more than or equal to 0 and less than or equal to 1;
Figure FDA0003189621710000032
9. the display panel driving method according to claim 8,
Figure FDA0003189621710000033
Figure FDA0003189621710000034
10. the display panel driving method according to claim 8,
Figure FDA0003189621710000035
Figure FDA0003189621710000036
11. the display panel driving method according to claim 9, wherein x is 0 or 1.
12. A display panel is characterized in that the display panel comprises a plurality of pixel units, each pixel unit at least comprises two sub-pixels of a first color, and each sub-pixel only comprises a sub-pixel which independently emits light; the pixel units are arranged in at least one row, and the pixel units in the same row are adjacent in sequence; in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
the display panel further includes a driving circuit for:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period; in the adjacent display periods, the gray scale of any sub-pixel is different;
wherein, in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure FDA0003189621710000041
Wherein, in each of the display periods, controlling each of the sub-pixels to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling the ith sub-pixel to emit light at the 1+ mn frame, wherein the gray scale of the ith sub-pixel at the 1+ mn frame is
Figure FDA0003189621710000042
Figure FDA0003189621710000043
Wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, b is more than or equal to 0 and less than or equal to 1, and a is not equal to b not equal to 0.5;
Figure FDA0003189621710000044
13. a display panel is characterized in that the display panel comprises a plurality of pixel units, each pixel unit at least comprises two sub-pixels of a first color, and each sub-pixel only comprises a sub-pixel which independently emits light; the pixel units are arranged in at least one row, and the pixel units in the same row are adjacent in sequence; in the same row of the pixel units, the ith sub-pixel is one sub-pixel of the ith pixel unit and one sub-pixel of the (i-1) th pixel unit;
the display panel further includes a driving circuit for:
in each display period, acquiring a target gray scale of the first color in the pixel unit;
in each display period, controlling each sub-pixel to emit light, so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period; in the adjacent display periods, the gray scale of any sub-pixel is different;
wherein, in each display period, acquiring the target gray scale of the first color in the pixel unit comprises:
calculating the target gray scale of the first color of the ith pixel unit in the 1+ mn frame
Figure FDA0003189621710000051
Wherein, in each of the display periods, controlling each of the sub-pixels to emit light so that the gray scale of the first color in the pixel unit is equal to the target gray scale of the first color in the same display period includes:
controlling two sub-pixels of the ith sub-pixel to respectively emit light in the 1+ mn frames, wherein the gray scale of the 1 st sub-pixel of the ith sub-pixel in the 1+ mn frames is
Figure FDA0003189621710000052
The gray scale of the 2 nd sub-pixel of the ith sub-pixel in the 1+ mn frame is
Figure FDA0003189621710000053
So that
Figure FDA0003189621710000054
Wherein the content of the first and second substances,
Figure FDA0003189621710000055
wherein i is a positive integer; m is a natural number; n is a positive integer; a and b are preset weight coefficients, wherein a is more than or equal to 0 and less than or equal to 1, and b is more than or equal to 0 and less than or equal to 1;
Figure FDA0003189621710000056
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