CN111653239A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111653239A CN111653239A CN202010618611.8A CN202010618611A CN111653239A CN 111653239 A CN111653239 A CN 111653239A CN 202010618611 A CN202010618611 A CN 202010618611A CN 111653239 A CN111653239 A CN 111653239A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a plurality of first color sub-pixels, and the first color sub-pixels comprise a first color sub-pixel A and a first color sub-pixel B; the display panel at least comprises a low gray scale picture when displaying, and when the display panel displays at least part of the low gray scale picture, the low gray scale picture comprises a first stage and a second stage, a first color sub-pixel A of the first stage has initial brightness, and a first color sub-pixel B of the first stage has initial brightness; in the second stage, the first color sub-pixel A has first brightness, and the first color sub-pixel B has second brightness; the first brightness is smaller than the second brightness, the first brightness is smaller than the initial brightness of the first color sub-pixel A, and the second brightness is larger than the initial brightness of the first color sub-pixel B; the gray scale value range of the low gray scale is greater than or equal to 0 and less than or equal to X, wherein X is a positive integer. The invention effectively improves the phenomenon that the display panel has uneven display during low-gray scale display.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
An OLED (organic Light-Emitting Diode) has been increasingly used in high-performance display as a current type Light-Emitting device. Compared with the LCD, the LCD has the advantages of high contrast, super lightness and thinness, flexibility and the like due to the self-luminous characteristic.
In the OLED device, the hole mobility of the hole injection layer is high due to the nature of the material itself, and the material of the hole injection layer is conductive in both the lateral and longitudinal directions. The OLED device includes pixels of three colors of red, green, and blue, and there is a difference in lighting voltage between the pixels of different colors. When the pixels with the colors with higher working voltage are lightened, the current is transversely conducted through the hole injection layer due to the influence of crosstalk current or thin film transistor leakage current, and the pixels with the colors with low lightening voltage can be lightened slightly, so that the phenomenon that the OLED panel is impure in single color and has color distortion to a certain degree when the OLED panel is lightened at a lower gray scale is called as low-gray-scale color cast, and particularly the problem of the low-gray-scale color cast is serious when the OLED panel is in a transition gray scale of light emitting and non-light emitting. In the prior art, a De-murm method is adopted for solving the low gray scale color cast, however, the existing De-murm has no compensation capability or has limited compensation capability for the low gray scale.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, which are used to improve the problem of color shift of low gray scale display.
In one aspect, the present invention provides a display panel comprising a plurality of first color sub-pixels, the first color sub-pixels comprising a first color sub-pixel a and a first color sub-pixel b;
the display panel at least comprises a low gray scale picture when displaying, and when the display panel displays at least part of the low gray scale picture, the low gray scale picture comprises a first stage and a second stage, the first color sub-pixel A of the first stage has initial brightness, and the first color sub-pixel B has initial brightness; in the second stage, the first color sub-pixel A has first brightness, and the first color sub-pixel B has second brightness;
the first brightness is smaller than the second brightness, the first brightness is smaller than the initial brightness of the first color sub-pixel A, and the second brightness is larger than the initial brightness of the first color sub-pixel B;
the gray scale value range of the low gray scale is more than or equal to 0 and less than or equal to X, wherein X is a positive integer.
In another aspect, the invention further provides a display device comprising the display panel.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel at least comprises a low-gray-scale picture when displaying, wherein the low-gray-scale picture comprises a first stage and a second stage, a first color sub-pixel A in the first stage has initial brightness, and a first color sub-pixel B in the first stage has initial brightness; in the second stage, the first color sub-pixel A has first brightness, and the first color sub-pixel B has second brightness; the first brightness is smaller than the second brightness, the first brightness is smaller than the initial brightness of the first color sub-pixel A, the second brightness is larger than the initial brightness of the first color sub-pixel B, the overall brightness of the first color sub-pixel is unchanged by reducing the brightness of the first color sub-pixel A and simultaneously improving the brightness of the first color sub-pixel B, so that the display effect is ensured, the first color sub-pixel A is not easy to feel visually after the brightness is reduced, the first color sub-pixel B is correspondingly required to be driven by a higher gray scale after the brightness is improved, the color cast phenomenon is not obvious under the high gray scale display, and the problem of low gray scale color cast is solved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a display panel according to the present invention;
FIG. 2 is a schematic diagram illustrating a display process of the low gray level image of FIG. 1 in a display period;
FIG. 3 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 4 is a schematic diagram of another display process of the low gray scale image of FIG. 1 in a display period;
FIG. 5 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 6 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 7 is a schematic diagram of a display process of the low gray level image of FIG. 6 in a display period;
FIG. 8 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 9 is a schematic diagram of a display process of the low gray scale image of FIG. 8 in a display period;
FIG. 10 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 11 is a schematic diagram illustrating a display process of the low gray level image of FIG. 10 in a display period;
FIG. 12 is a schematic view of another display process of the low gray scale image of FIG. 10 in a display period;
FIG. 13 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 14 is a schematic view of another display process of the low gray scale image of FIG. 13 in a display period;
FIG. 15 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 16 is a schematic view of another display process of the low gray scale image of FIG. 15 in a display period;
FIG. 17 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 18 is a schematic view of another display process of the low gray scale image of FIG. 17 in a display period;
FIG. 19 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 20 is a schematic view of another display process of the low gray scale image of FIG. 19 in a display period;
FIG. 21 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 22 is a schematic view of another display process of the low gray scale image of FIG. 21 in a display period;
FIG. 23 is a schematic structural diagram of another display panel provided in the present invention;
FIG. 24 is a schematic view of another display process of the low gray scale image of FIG. 23 in a display period;
FIG. 25 is a schematic view of another display process of the low gray scale image of FIG. 1 in a display period;
fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a display panel according to the present invention, and fig. 2 is a schematic diagram of a display process of a low gray level image in fig. 1 in a display period. Referring to fig. 1, the present embodiment provides a display panel, the display panel 100 includes a plurality of first color sub-pixels 2, the first color sub-pixels 2 include a first color sub-pixel a 21 and a first color sub-pixel b 22;
when the display panel 100 displays at least one low gray scale frame 1, referring to fig. 2, the low gray scale frame includes a first stage S1 and a second stage S2, wherein the first color sub-pixel a 21 of the first stage S1 has an initial brightness a, and the first color sub-pixel b 22 has an initial brightness L'; the second stage S2 shows that the first color sub-pixel a 21 has the first brightness B and the first color sub-pixel B22 has the second brightness L;
the first brightness B is smaller than the second brightness L, the first brightness B is smaller than the initial brightness A of the first color sub-pixel A21, and the second brightness L is larger than the initial brightness L' of the first color sub-pixel B22;
the gray scale value range of the low gray scale is greater than or equal to 0 and less than or equal to X, wherein X is a positive integer.
It is understood that the display panel 100 further comprises a display area AA and a non-display area BB disposed around the display area AA, and only the number of the low gray scale pictures 1 and the number of the first color sub-pixels 2 are schematically shown in fig. 1. The number of the low gray-scale frames 1 is not specifically limited, and the display area AA of the display panel 100 displays the low gray-scale frames in another embodiment of the invention. In some alternative embodiments, the display panel further comprises a second color sub-pixel and a third color sub-pixel, not shown in fig. 1. The numbers of the first color sub-pixel a 21 and the second color sub-pixel b 22 in the low gray scale picture 1 are only schematically illustrated.
Before the brightness adjustment, i.e. the first stage S1 of the low gray scale picture, the first color sub-pixel a has the initial brightness a, the first color sub-pixel b 22 has the initial brightness L ', the number of the first color sub-pixels a 21 is set to m, the number of the first color sub-pixels b 22 is set to n, and it can be known that the overall brightness K of the low gray scale picture 1 in the first stage S1 is m × a + n × L ', and in some preferred embodiments, the initial brightness a of the first color sub-pixel a 21 is equal to the initial brightness L ' of the first color sub-pixel b 22; in the second stage S2, the luminances of the first color sub-pixel a 21 and the first color sub-pixel B22 in the low gray scale image 1 are adjusted, after the adjustment, the first color sub-pixel a 21 has a first luminance B, the first color sub-pixel B22 has a second luminance L, it should be noted that the first luminance B is smaller than the second luminance L, the first luminance B is smaller than the initial luminance a of the first color sub-pixel a 21, and the second luminance L is larger than the initial luminance L' of the first color sub-pixel B22, that is, after the luminance is adjusted, the luminance of the first color sub-pixel a 21 decreases, and the luminance of the first color sub-pixel B22 increases. The total luminance of the low-gradation screen 1 after the adjustment is K, which is m × B + n × L, and thus m × a + n × L' is m × B + n × L.
On one hand, the total brightness of the low gray scale picture 1 is unchanged, so that the display effect can be ensured; on the other hand, the brightness of the first color sub-pixel A21 is reduced, and the change of the brightness is not easy to be sensed visually, but the brightness of the first color sub-pixel B22 is increased, and then the higher gray scale is needed for driving, and the color cast phenomenon is not obvious under the high gray scale display, so that the problem of low gray scale color cast is solved.
In some alternative embodiments, with continued reference to fig. 2, the number of first-color sub-pixels a 21 in the low-grayscale picture 1 is equal to the number of first-color sub-pixels b 22.
The display panel 100 of the present invention at least includes a low gray scale frame 1, and at this time, brightness adjustment needs to be performed on the first color sub-pixel a 21 and the first color sub-pixel b 22 in the low gray scale frame 1.
The number of the first color sub-pixels a 21 is m, the number of the first color sub-pixels B22 is n, and it can be known from the above that the overall brightness is unchanged in the first stage S1 and the second stage S2 of the low gray scale picture 1, i.e., K ═ m × a + n × L ═ m × B + n × L, and m × (a-B) ═ n × x (L-L ') is obtained, it can be understood that the brightness decrease amount (a-B) of the first color sub-pixels a 21 is equal to the brightness increase amount (L-L') of the first color sub-pixels B22, and the overall brightness is ensured to be unchanged, i.e., m ═ n is obtained, i.e., the number of the first color sub-pixels a 21 is equal to the number of the first color sub-pixels B22 in the low gray scale picture 1.
The number of the first color sub-pixels A21 in the low gray scale picture 1 is equal to the number of the first color sub-pixels B22, the total brightness of the low gray scale picture 1 is unchanged, and the display effect can be ensured.
In some alternative embodiments, referring to fig. 3, fig. 3 is a schematic structural diagram of another display panel provided in the present invention. In the second phase of the low gray scale picture 1, the area of the first color sub-pixel a 21 is larger than that of the first color sub-pixel b 22, and the first color sub-pixel a 21 and the first color sub-pixel b 22 are alternately arranged.
Referring to the arrangement rule of the first color sub-pixel a 21 and the second color sub-pixel b 22 in fig. 3, the area of the first color sub-pixel a 21 is larger than that of the first color sub-pixel b 22, and it is required to satisfy that the first color sub-pixel a 21 and the first color sub-pixel b 22 are alternately arranged. At this time, of course, the first luminance B of the first color sub-pixel a 21 is less than the second luminance L of the first color sub-pixel B22, the first luminance B is less than the initial luminance a of the first color sub-pixel a 21, and the second luminance L is greater than the initial luminance L' of the first color sub-pixel B22.
The first color sub-pixel A21 and the first color sub-pixel B22 are alternately arranged, so that the light and shade alternation is more uniform, and the problem of uneven low-gray-scale display is further improved.
It can be understood that the brightness of the first color sub-pixel a 21 with a larger area is reduced and is not easy to be found by human eyes, but after the brightness of the first color sub-pixel b 22 with a smaller area is increased, the driving is performed by using a higher gray scale, the phenomenon of uneven display of the low gray scale can be improved without a Demura process, and the influence on the service life of the sub-pixels is very small.
In some alternative embodiments, with continued reference to fig. 3, the emission color of the first color sub-pixel 2 is green.
In the second phase of the low gray scale picture 1, the area of the first color sub-pixel a 21 is larger than that of the first color sub-pixel b 22, and the first color sub-pixel a 21 and the first color sub-pixel b 22 are alternately arranged, while the light emitting color of the first color sub-pixel 2 is green, when the picture is displayed, the contribution of the green sub-pixel to the brightness is the largest, and the change of the brightness of the green sub-pixel relative to the red sub-pixel and the blue sub-pixel is more easily recognized by human eyes.
With continued reference to fig. 3, the current density of the first color sub-pixel a 21 is less than the current density of the first color sub-pixel b 22 during the second phase of the low grayscale screen 1.
In the second phase of the low gray scale picture 1, the area of the first color sub-pixel a 21 is larger than the area of the first color sub-pixel b 22, and the first color sub-pixel a 21 and the first color sub-pixel b 22 are alternately arranged, when the voltages provided to the first color sub-pixel a 21 and the first color sub-pixel b 22 in the low gray scale picture 1 are the same, since the area of the first color sub-pixel a 21 is larger than the area of the first color sub-pixel b 22, the current density of the first color sub-pixel a 21 is smaller than the current density of the first color sub-pixel b 22, the current density is increased, and the problem of uneven low gray scale display can be further improved.
In some alternative embodiments, when the gray scale value of the low gray scale frame 1 is 32, the ratio of the current density of the first color sub-pixel a 21 to the current density of the first color sub-pixel b 22 is 1: 8, at this time, the ratio of the first luminance of the first color sub-pixel a 21 to the second luminance of the first color sub-pixel b 22 is 1:4, the gray scale of the first color sub-pixel a 21 is 20, and the gray scale of the first color sub-pixel b 22 is 40, so that the first color sub-pixel b 22 needs to be driven by a higher gray scale, thereby improving the problem of low gray scale display non-uniformity.
In some alternative embodiments, referring to fig. 4, fig. 4 is a schematic diagram of another display process of the low gray scale image in fig. 1 within one display period.
The first brightness is zero, and the second brightness is calculated according to the following method:
wherein, L is the second luminance, L' is the initial luminance of the first color sub-pixel b, m is the number of the first color sub-pixels a in the second stage of the low gray scale picture, n is the number of the first color sub-pixels b in the second stage of the low gray scale picture, and a is the initial luminance of the first color sub-pixels a.
Fig. 4 shows that the first color sub-pixel a 21 has the initial luminance a, the first color sub-pixel b 22 has the initial luminance L 'in the first stage of the low gray scale picture 1, the number of the first color sub-pixels a 21 is set to m, the number of the first color sub-pixels b 22 is set to n, and it can be known that the overall luminance K ═ m × a + n × L' of the low gray scale picture 1 in the first stage S1. the black filling of the first color sub-pixel a 21 in the second stage indicates that it does not emit light in the black state, that is, the first luminance is zero, the number of the first color sub-pixels corresponding to light emission is reduced, the overall luminance after the first color sub-pixel a 21 does not emit light remains K, but K ═ n × L, and it can be known that K ═ m × a + n × L ═ n × L
On one hand, the total brightness of the low gray scale picture 1 is unchanged, so that the display effect can be ensured; on the other hand, the first color sub-pixel A21 does not emit light, and the change of brightness is not easy to be sensed visually, but the brightness of the first sub-pixel B22 is increased to the same extent as the brightness of the first color sub-pixel A21, and after the brightness of the first color sub-pixel B22 is increased, a higher gray scale is required to be used for driving, and the phenomenon of color cast is not obvious under the high gray scale display, so that the problem of low gray scale color cast is solved.
In some alternative embodiments, referring to fig. 5, fig. 5 is a schematic structural diagram of another display panel provided in the present invention. The display panel 100 at least includes a high gray scale frame 3 when displaying, and the gray scale value range of the high gray scale is greater than X and less than or equal to Y, wherein Y is a positive integer, and Y is the highest gray scale of the display panel.
Fig. 5 schematically shows that the display panel 100 includes the number of the high gray level frames 3, and here, the number of the high gray level frames 3 is not specifically limited, it can be understood that the gray level of the low gray level is X, and the range of the gray level is greater than X and less than or equal to Y, which is the high gray level, and here, the gray level of the high gray level is not specifically limited, and the gray level can be set according to the actual display frame.
In the case of displaying a high-grayscale image, since the luminance of the first color sub-pixel 2 itself is relatively high, the mura phenomenon is not noticeable, and therefore, it is not necessary to adjust the luminance of the first color sub-pixel 2 in the high-grayscale image, and the amount of data calculation can be reduced.
In some alternative embodiments, with continued reference to fig. 5, the current density of the first color sub-pixel a 21 is equal to the current density of the first color sub-pixel b 22 in the high grayscale frame 3.
The area of the first color sub-pixel a 21 in the high gray-scale picture 3 is equal to the area of the first color sub-pixel b 22, and the voltages applied to the first color sub-pixel a 21 and the first color sub-pixel b 22 in the low gray-scale picture 1 are the same, and the current density of the first color sub-pixel a 21 is equal to the current density of the first color sub-pixel b 22, so that the luminance of the first color sub-pixel a 21 is equal to the luminance of the first color sub-pixel b 22. Since the luminance of the first color sub-pixel a 21 and the first color sub-pixel b 22 in the high gray scale picture 3 is relatively high, the mura phenomenon is not obvious, and therefore, the luminance of the first color sub-pixel 2 in the high gray scale picture is not required to be adjusted.
In some alternative embodiments, with continued reference to fig. 1 and 2, the range of gray scale values for the low gray scale is greater than or equal to 0 and less than or equal to 128.
It should be noted that the gray scale value of the low gray scale image is any value between 0 and 128, and may be set according to the actually displayed image, and the gray scale value of the low gray scale image is not specifically limited herein.
When the gray value of the low gray scale picture is displayed between 0 and 128, the brightness of the first sub-pixel A21 and the first sub-pixel B22 in the low gray scale picture is adjusted in the second stage, namely the brightness of the first sub-pixel A21 is reduced, the brightness of the first sub-pixel B22 is improved at the same time, and the problem of low gray scale color cast is solved.
In some alternative embodiments, with continuing reference to fig. 3 and 4, and with reference to fig. 6, 7, 8 and 9, fig. 6 is a schematic structural diagram of another display panel provided by the present invention, fig. 7 is a schematic structural diagram of a display process of the low gray scale image in one display period in fig. 6, fig. 8 is a schematic structural diagram of another display panel provided by the present invention, and fig. 9 is a schematic structural diagram of a display process of the low gray scale image in fig. 8 in one display period.
In the second stage S2 of the low gray scale picture 1, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is m: when n, the second brightness L is (m + n) times the initial brightness of the first color sub-pixel B22.
It is understood that in the second stage S2 of the low gray scale picture 1, the ratio of the number of the first color sub-pixels a to the number of the first color sub-pixels b is m: when n is reached, the m first-color sub-pixels A21 do not emit light, and the second luminance L of the first-color sub-pixel B22 is n times (m + n) the initial luminance.
The total brightness of the first stage S1 is K, the total brightness of the second stage S2 is unchanged, and K is m × a + n × L ═ n × L, which indicates that the total brightness of the low gray scale image 1 is K
In the first stage S1, the luminance of the first color sub-pixel a 21 is equal to the luminance of the first color sub-pixel b 22, and thus L: (m + n): n is known.
In fig. 4, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:1, that is, in the second phase S2, 1/2 number of the first color sub-pixels 2 of the low gray scale picture 1 do not emit light, but the luminance of the n first color sub-pixels b 22 emitting light is 2 times of the initial luminance. Referring to fig. 4, the luminance of the first color sub-pixel b 22a may be equal to the sum of the initial luminance of the first color sub-pixel b 22a, 1/2 of the initial luminance of the first color sub-pixel a 21a, and 1/2 of the initial luminance of the first color sub-pixel a 21b, and the luminance of the other first color sub-pixels b 22 is calculated according to this method, so as to keep the total luminance of the low gray scale picture 1 in the second stage S2 unchanged, the second luminance L is 2 times of the initial luminance of the first color sub-pixel b 22, and the luminance increase of the first color sub-pixel b 22 requires a higher gray scale to drive, thereby improving the problem of low gray scale color cast.
In fig. 7, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 2:1, that is, 2/3 number of the first color sub-pixels 2 in the second phase S2 of the low gray scale picture 1 do not emit light, but the luminance of the n first color sub-pixels b 22 emitting light is 3 times of the initial luminance. Referring to fig. 7, the luminance of the first color sub-pixel b 22a may be equal to the sum of the initial luminance of the first color sub-pixel b 22a, the initial luminance of the first color sub-pixel a 21a, and the initial luminance of the first color sub-pixel a 21b, and the luminance of the other first color sub-pixels b 22 is also calculated according to this method, so that the total luminance of the low gray scale picture 1 in the second stage S2 is kept unchanged, the second luminance L is 3 times the initial luminance of the first color sub-pixel b 22, and the luminance increase of the first color sub-pixel b 22 requires a higher gray scale to drive, thereby improving the problem of low gray scale color cast.
In fig. 9, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:2, that is, 1/3 number of the first color sub-pixels 2 in the second phase S2 of the low gray scale picture 1 do not emit light, but the luminance of the n first color sub-pixels b 22 emitting light is 3/2 times its initial luminance. In fig. 9, the luminance of the first color sub-pixel b 22a may be equal to the sum of the initial luminance of the first color sub-pixel b 22a and the initial luminance of 1/2 the first color sub-pixel a 21a, and the luminance of the other first color sub-pixels b 22 is calculated according to this method, so that the total luminance of the low gray scale picture 1 in the second stage S2 is kept unchanged, the second luminance L is 3/2 times of the initial luminance of the first color sub-pixel b 22, and the luminance increase of the first color sub-pixel b 22 requires a higher gray scale to drive, thereby improving the problem of low gray scale color cast.
In some alternative embodiments, referring to fig. 10, fig. 10 and fig. 11, fig. 10 is a schematic structural diagram of another display panel provided by the present invention, and fig. 11 is a schematic diagram of a display process of the low gray scale image in fig. 10 in one display period.
In fig. 10, the display panel 100 further includes a plurality of second color sub-pixels 4 and a plurality of third color sub-pixels 5, wherein the second color sub-pixels 4 include a second color sub-pixel a 41 and a second color sub-pixel b 42, and the third color sub-pixels 5 include a third color sub-pixel a 51 and a third color sub-pixel b 52;
when the display panel 100 is displaying at least a portion of the low grayscale picture 1,
referring to fig. 11, in the first stage S1 of the low gray scale picture 1, the first color sub-pixel a 41 has an initial brightness C, and the second color sub-pixel b has an initial brightness D; the second color sub-pixel A41 has the third brightness E and the second color sub-pixel B42 has the fourth brightness F in the second stage S2; the third brightness E is smaller than the fourth brightness F, the third brightness E is smaller than the initial brightness C of the first color sub-pixel A41, and the fourth brightness F is larger than the initial brightness D of the second color sub-pixel B42;
in the first stage S1 of the low grayscale picture 1, the first color sub-pixel a 51 has an initial brightness G, and the second color sub-pixel b 52 has an initial brightness H; the third color sub-pixel A51 has the fifth luminance I and the third color sub-pixel B52 has the sixth luminance J in the second stage S2; the fifth luminance I is smaller than the sixth luminance J, the fifth luminance I is smaller than the initial luminance G of the first color sub-pixel a 51, and the sixth luminance J is larger than the initial luminance H of the second color sub-pixel b 52.
In fig. 11, before the brightness adjustment, i.e. the first stage S1 of the low gray scale picture, the first color sub-pixel a has the initial brightness a, and the first color sub-pixel b 22 has the initial brightness L'; in the second stage S2, the luminances of the first color sub-pixel a 21 and the first color sub-pixel B22 in the low gray scale image 1 are adjusted, after the adjustment, the first color sub-pixel a 21 has a first luminance B, the first color sub-pixel B22 has a second luminance L, it should be noted that the first luminance B is smaller than the second luminance L, the first luminance B is smaller than the initial luminance a of the first color sub-pixel a 21, and the second luminance L is larger than the initial luminance L' of the first color sub-pixel B22, that is, after the luminance is adjusted, the luminance of the first color sub-pixel a 21 decreases, and the luminance of the first color sub-pixel B22 increases. The total brightness of the adjusted low gray scale picture 1 is unchanged;
before the brightness adjustment, i.e. the first stage S1 of the low gray scale picture, the first color sub-pixel a 41 has the initial brightness C, and the second color sub-pixel b 42 has the initial brightness D; in the second stage S2, the luminances of the second color sub-pixel a 41 and the second color sub-pixel b 42 in the low-gray-level picture 1 are adjusted, after the adjustment, the second color sub-pixel a 41 has a third luminance E, the second color sub-pixel b 42 has a fourth luminance F, it should be noted that the third luminance E is smaller than the fourth luminance F, the third luminance E is smaller than the initial luminance C of the second color sub-pixel a 41, and the fourth luminance F is greater than the initial luminance D of the second color sub-pixel b 42, that is, after the luminance is adjusted, the luminance of the second color sub-pixel a 41 is decreased, while the luminance of the second color sub-pixel b 42 is increased, and the total luminance of the adjusted low-gray-level picture 1 is unchanged;
before the brightness adjustment, i.e. the first stage S1 of the low gray scale picture, the first color sub-pixel a 51 has the initial brightness G, and the second color sub-pixel b 52 has the initial brightness H; in the second stage S2, the luminances of the third color sub-pixel a 51 and the third color sub-pixel b 52 in the low-gray-level picture 1 are adjusted, after the adjustment, the third color sub-pixel a 51 has a fifth luminance I, the third color sub-pixel b 52 has a sixth luminance J, it should be noted that the fifth luminance I is smaller than the sixth luminance J, the fifth luminance I is smaller than the initial luminance G of the third color sub-pixel a 51, and the sixth luminance J is larger than the initial luminance H of the third color sub-pixel b 52, that is, after the luminance is adjusted, the luminance of the third color sub-pixel a 51 is decreased, while the luminance of the third color sub-pixel b 52 is increased, and the total luminance of the adjusted low-gray-level picture 1 is unchanged.
On one hand, the total brightness of the low gray scale picture 1 is unchanged, so that the display effect can be ensured; on the other hand, the brightness of the first color sub-pixel A21, the second color sub-pixel A41 and the third color sub-pixel A51 is reduced, and the brightness is not easy to be visually sensed to change, but the brightness of the first color sub-pixel B22, the second color sub-pixel B42 and the third color sub-pixel B52 is improved, so that higher gray scales are required to drive, and the color cast phenomenon is not obvious in high gray scale display, so that the problem of low gray scale color cast is solved.
In some alternative embodiments, with continued reference to fig. 10 and 11, one of the difference between the second luminance L and the initial luminance L' of the first color sub-pixel b 22, the difference between the fourth luminance F and the initial luminance D of the second color sub-pixel b 42, the difference between the sixth luminance J and the initial luminance H of the third color sub-pixel b 52 is greater than the other two, or two of them are greater than the third one.
It is understood that the difference between the second luminance L and the initial luminance L' of the first color sub-pixel b 22, the difference between the fourth luminance F and the initial luminance D of the second color sub-pixel b 42, and the difference between the sixth luminance J and the initial luminance H of the third color sub-pixel b 52 are larger in value. It is understood that the luminance of the three color sub-pixels is not easily perceived visually if the luminance increases to the same extent, and that the luminance of one or two of the color sub-pixels is most easily perceived visually if the luminance increases to a greater extent.
In some alternative embodiments, with continued reference to fig. 10 and 11, the difference between the second luminance L and the initial luminance L' of the first color sub-pixel b 22 is greater than one of the difference between the fourth luminance F and the initial luminance D of the second color sub-pixel b 42, the sixth luminance J, and the initial luminance H of the third color sub-pixel b 52, and the light emitting color of the first color sub-pixel 2 is green.
The green sub-pixel can be understood to have the largest contribution to the brightness, and the green sub-pixel is easy to be recognized by human eyes when the brightness of the green sub-pixel is increased to a larger extent, so that the problem of low-frequency display unevenness is improved.
In some alternative embodiments, referring to fig. 12, fig. 12 is a schematic diagram of another display process of the low gray scale image in fig. 10 in one display period, and in fig. 12, the fourth luminance F and the sixth luminance J are both zero.
In fig. 12, the first color sub-pixel a 21, the second color sub-pixel a 41 and the third color sub-pixel a 51 do not emit light, while the brightness of the first color sub-pixel b 22, the second color sub-pixel b 42 and the third color sub-pixel a 52 increases, in some alternative embodiments, the brightness of all the first color sub-pixels b 22 increases to a degree equal to the initial brightness a of all the first color sub-pixels a 21, the brightness of all the second color sub-pixels b 42 increases to a degree equal to the initial brightness C of all the second color sub-pixels a 41, the brightness of all the third color sub-pixels b 52 increases to a degree equal to the initial brightness G of all the third color sub-pixels a 51, and after the brightness of the first color sub-pixels b 22, the second color sub-pixels b 42 and the third color sub-pixels b 52 is increased, a higher gray scale is required to drive, and the color shift phenomenon is not obvious under the gray scale display, thereby improving the problem of low gray scale color cast.
In some alternative embodiments, referring to fig. 12, first color subpixel b 22, second color subpixel b 42, and third color subpixel b 52 form a diamond shape.
Fig. 12 only shows that the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel 52 form a diamond structure, but other arrangement manners are also possible, for example, when the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel 52 are not adjacent to each other, the diamond shape may be more uniform visually, and the low gray scale may be further improved.
Referring to fig. 13-24, fig. 13 is a schematic structural diagram of another display panel provided in the present invention; FIG. 14 is a schematic view of another display process of the low gray scale image of FIG. 13 in a display period; FIG. 15 is a schematic structural diagram of another display panel provided in the present invention; FIG. 16 is a schematic view of another display process of the low gray scale image of FIG. 15 in a display period; FIG. 17 is a schematic structural diagram of another display panel provided in the present invention; FIG. 18 is a schematic view of another display process of the low gray scale image of FIG. 17 in a display period; FIG. 19 is a schematic structural diagram of another display panel provided in the present invention; FIG. 20 is a schematic view of another display process of the low gray scale image of FIG. 19 in a display period; FIG. 21 is a schematic structural diagram of another display panel provided in the present invention; FIG. 22 is a schematic view of another display process of the low gray scale image of FIG. 21 in a display period; FIG. 23 is a schematic structural diagram of another display panel provided in the present invention; FIG. 24 is a schematic view of another display process of the low gray scale image of FIG. 23 in one display period.
In fig. 13 and 14, the number of the first color sub-pixels 2 is reduced 2/3, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 2:1, and the luminance of the first color sub-pixels b 22 is 3 times the initial luminance of the first color sub-pixels b in the second stage S2; the number of the second color sub-pixels 4 is reduced 1/3, and the ratio of the number of the second color sub-pixels A41 to the number of the second color sub-pixels B42 is 1:2, the luminance of the second color sub-pixel b 42 in the second stage S2 is 3/2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/3, i.e. the ratio of the number of the third color sub-pixels a 51 to the number of the third color sub-pixels b 52 is 1:2, in the second stage S2, the luminance of the third color sub-pixel b 52 is 3/2 times the initial luminance of the third color sub-pixel b 52, and the diamond-shaped rhombus formed by the first color sub-pixel b 22, the second color sub-pixel b 42 and the third color sub-pixel 52 can be more uniform visually, so as to further improve the low gray level. In fig. 15 and 16, the number of the first color sub-pixels 2 is reduced 1/3, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:2, and the luminance of the first color sub-pixels b 22 is 3/2 times the initial luminance of the first color sub-pixels b in the second stage S2; the number of the second color sub-pixels 4 is reduced 1/3, and the ratio of the number of the second color sub-pixels A41 to the number of the second color sub-pixels B42 is 1:2, the luminance of the second color sub-pixel b 42 in the second stage S2 is 3/2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/2, i.e. the ratio of the number of the third color sub-pixels a 51 to the number of the third color sub-pixels b 52 is 1:1, in the second stage S2, the luminance of the third color sub-pixel b 52 is 2 times the initial luminance of the third color sub-pixel b 52, and the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel b 52 form a diamond shape, which is visually more uniform, and can further improve the low gray level.
In fig. 17 and 18, the number of the first color sub-pixels 2 is reduced 1/3, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:2, and the luminance of the first color sub-pixels b 22 is 3/2 times the initial luminance of the first color sub-pixels b in the second stage S2; the number of the second color sub-pixels 4 is reduced 1/3, and the ratio of the number of the second color sub-pixels A41 to the number of the second color sub-pixels B42 is 1:2, the luminance of the second color sub-pixel b 42 in the second stage S2 is 3/2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/2, i.e. the ratio of the number of the third color sub-pixels a 51 to the number of the third color sub-pixels b 52 is 1:1, in the second stage S2, the luminance of the third color sub-pixel b 52 is 2 times the initial luminance of the third color sub-pixel b 52, and the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel b 52 form a diamond shape, which is visually more uniform, and can further improve the low gray level.
In fig. 19 and 20, the number of the first color sub-pixels 2 is reduced by 1/2, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:1, the luminance of the first color sub-pixel b 22 in the second stage S2 is 2 times the initial luminance of the first color sub-pixel b 22; the number of the second color sub-pixels 4 is reduced 1/3, and the ratio of the number of the second color sub-pixels A41 to the number of the second color sub-pixels B42 is 1:2, the luminance of the second color sub-pixel b 42 in the second stage S2 is 3/2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/2, i.e. the ratio of the number of the third color sub-pixels a 51 to the number of the third color sub-pixels b 52 is 1:1, in the second stage S2, the luminance of the third color sub-pixel b 52 is 2 times the initial luminance of the third color sub-pixel b 52, and the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel b 52 form a diamond shape, which is visually more uniform, and can further improve the low gray level.
In fig. 21 and 22, the number of the first color sub-pixels 2 is reduced by 1/2, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:1, the luminance of the first color sub-pixel b 22 in the second stage S2 is 2 times the initial luminance of the first color sub-pixel b 22; the number of second color sub-pixels 4 is reduced 1/2, i.e. the ratio of the number of second color sub-pixels a 41 to second color sub-pixels b 42 is 1:1, the luminance of the second color sub-pixel b 42 in the second stage S2 is 2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/3, i.e. the ratio of the number of the third color sub-pixels a 51 to the second color sub-pixels b 52 is 1:2, in the second stage S2, the luminance of the third color sub-pixel b 52 is 3/2 times the initial luminance of the third color sub-pixel b 52, and the first color sub-pixel b 22, the second color sub-pixel b 42, and the third color sub-pixel b 52 form a diamond shape, which is visually more uniform, so as to further improve the low gray level.
In fig. 23 and 24, the number of the first color sub-pixels 2 is reduced 1/3, that is, the ratio of the number of the first color sub-pixels a 21 to the number of the first color sub-pixels b 22 is 1:2, and the luminance of the first color sub-pixels b 22 is 3/2 times the initial luminance of the first color sub-pixels b in the second stage S2; the number of the second color sub-pixels 4 is reduced 1/2, and the ratio of the number of the second color sub-pixels A41 to the number of the second color sub-pixels B42 is 1:1, the luminance of the second color sub-pixel b 42 in the second stage S2 is 2 times the initial luminance of the second color sub-pixel b 42; the number of the third color sub-pixels 5 is reduced 1/2, i.e. the ratio of the number of the third color sub-pixels a 51 to the second color sub-pixels b 52 is 1:1, in the second stage S2, the luminance of the third color sub-pixel b 52 is 2 times the initial luminance of the third color sub-pixel b 52, and the diamond-shaped rhombus formed by the first color sub-pixel b 22, the second color sub-pixel b 42 and the third color sub-pixel 52 can be more uniform visually, so as to further improve the low gray level.
In some alternative embodiments, referring to fig. 25, fig. 25 is a schematic view of another display process of the low gray scale image in fig. 1 within one display period.
In the second stage S2 of the low gray scale frame 1, the first color sub-pixel b emits light in the display frame part of different frames, and the ith frame between every two adjacent frames is at least partially different from the first color sub-pixel emitting light in the ith ± 1 frame, where i is a positive integer greater than 1.
The first color sub-pixel b 22 is filled with different patterns in fig. 25 to indicate light emission and non-light emission in different frames, although the first color sub-pixel a 21 is non-light emission in the second stage S2 of the low gray scale picture 1.
Using the Dithering technique, fig. 12 only takes 2 frames of the second stage S2 of the low-grayscale frame 1 as an example, a portion of the first-color sub-pixel b 22 in the 1 st frame does not emit light (e.g., the first-color sub-pixel b 22a in fig. 12), wherein a portion of the first-color sub-pixel b 22 emits light (e.g., the first-color sub-pixel b 22b in fig. 12), and the first-color sub-pixel b 22a in the 2 nd frame emits light but the first-color sub-pixel b does not emit light, where the first-color sub-pixel 2 in the 1 st frame and the first-color sub-pixel b in the 2 nd frame emit light are completely different. Of course, the luminance of the first color sub-pixel b 22 emitting light is increased to the same extent as the luminance of the first color sub-pixel b 22 not emitting light, and a higher gray level is required for driving after the luminance is increased, so that the problem of low gray level display unevenness can be solved.
The embodiment is a dithering display, the image is modified by randomly adding the luminous first color sub-pixel B22 between the adjacent sub-pixels by using visual effect during the switching process between different frames, the dithering display does not increase the total number of the sub-pixels, but randomly selects and increases the luminous number of the first color sub-pixel B22, thereby improving the display quality, and simultaneously, the power consumption can be saved by not driving all the first color sub-pixels B22 to emit light in each frame.
In some alternative embodiments, please refer to fig. 26, fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 200 according to the embodiment includes the display panel 100 according to the above embodiment of the present invention. The embodiment of fig. 26 only uses a mobile phone as an example to describe the display device 200, and it should be understood that the display device 200 provided in the embodiment of the present invention may be other display devices 200 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in the foregoing embodiments, and the detailed description of the embodiment is not repeated herein.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
the display panel at least comprises a low-gray-scale picture when displaying, wherein the low-gray-scale picture comprises a first stage and a second stage, a first color sub-pixel A in the first stage has initial brightness, and a first color sub-pixel B in the first stage has initial brightness; in the second stage, the first color sub-pixel A has first brightness, and the first color sub-pixel B has second brightness; the first brightness is smaller than the second brightness, the first brightness is smaller than the initial brightness of the first color sub-pixel A, the second brightness is larger than the initial brightness of the first color sub-pixel B, the overall brightness of the first color sub-pixel is unchanged by reducing the brightness of the first color sub-pixel A and simultaneously improving the brightness of the first color sub-pixel B, so that the display effect is ensured, the first color sub-pixel A is not easy to feel visually after the brightness is reduced, the first color sub-pixel B is correspondingly required to be driven by a higher gray scale after the brightness is improved, the color cast phenomenon is not obvious under the high gray scale display, and the problem of low gray scale color cast is solved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (17)
1. A display panel comprises a plurality of first color sub-pixels, wherein the first color sub-pixels comprise a first color sub-pixel A and a first color sub-pixel B;
the display panel at least comprises a low gray scale picture when displaying, and when the display panel displays at least part of the low gray scale picture, the low gray scale picture comprises a first stage and a second stage, the first color sub-pixel A of the first stage has initial brightness, and the first color sub-pixel B has initial brightness; in the second stage, the first color sub-pixel A has first brightness, and the first color sub-pixel B has second brightness;
the first brightness is smaller than the second brightness, the first brightness is smaller than the initial brightness of the first color sub-pixel A, and the second brightness is larger than the initial brightness of the first color sub-pixel B;
the gray scale value range of the low gray scale is more than or equal to 0 and less than or equal to X, wherein X is a positive integer.
2. The display panel of claim 1, wherein the number of the first color sub-pixels A is equal to the number of the first color sub-pixels B in the low gray scale picture.
3. The display panel of claim 1, wherein the area of the first color sub-pixel A is larger than that of the first color sub-pixel B in the second phase of the low grayscale picture, and the first color sub-pixel A and the first color sub-pixel B are alternately arranged.
4. The display panel according to claim 3, wherein the light emission color of the first color sub-pixel is green.
5. The display panel of claim 3 wherein the current density of first color subpixel A is less than the current density of first color subpixel B.
6. The display panel according to claim 1, wherein the first luminance is zero and the second luminance is calculated according to the following method:
wherein L is the second luminance, L' is the initial luminance of the first color sub-pixel b, m is the number of the first color sub-pixels a in the second stage of the low gray scale picture, n is the number of the first color sub-pixels b in the second stage of the low gray scale picture, and a is the initial luminance of the first color sub-pixels a.
7. The display panel of claim 1, wherein the display panel at least comprises a high gray scale image when displaying, and the gray scale value range of the high gray scale is greater than X and less than or equal to Y, wherein Y is a positive integer and Y is the highest gray scale of the display panel.
8. The display panel of claim 7, wherein the current density of the first color sub-pixel A is equal to the current density of the first color sub-pixel B in the high grayscale image.
9. The display panel according to claim 1, wherein the low gradation value range is 0 or more and 128 or less.
10. The display panel of claim 6, wherein the ratio of the number of the first color sub-pixels A to the number of the first color sub-pixels B in the second phase of the low grayscale picture is m: when n, the second brightness is n times (m + n) of the initial brightness of the first color sub-pixel B.
11. The display panel of claim 1, further comprising a plurality of second color sub-pixels and a plurality of third color sub-pixels, wherein the second color sub-pixels comprise a second color sub-pixel A and a second color sub-pixel B, and the third color sub-pixels comprise a third color sub-pixel A and a third color sub-pixel B;
when the display panel is displaying at least part of the low gray scale picture,
in the first stage of the low gray scale picture, the first color sub-pixel A has initial brightness, and the second color sub-pixel B has initial brightness; in the second stage, the first color sub-pixel A has a third brightness, and the second color sub-pixel B has a fourth brightness; the third brightness is smaller than the fourth brightness, the third brightness is smaller than the initial brightness of the second color sub-pixel A, and the fourth brightness is larger than the initial brightness of the second color sub-pixel B;
in the first stage of the low gray scale picture, the first color sub-pixel A has initial brightness, and the second color sub-pixel B has initial brightness; in the second stage, the first color sub-pixel A has fifth brightness, and the second color sub-pixel B has sixth brightness; the fifth brightness is smaller than the sixth brightness, the fifth brightness is smaller than the initial brightness of the third color sub-pixel A, and the sixth brightness is larger than the initial brightness of the third color sub-pixel B.
12. The display panel of claim 11, wherein one of the difference between the second luminance and the initial luminance of the first color sub-pixel b, the difference between the fourth luminance and the initial luminance of the second color sub-pixel b, the difference between the sixth luminance and the initial luminance of the third color sub-pixel b is greater than the other two, or two of them are greater than the third one.
13. The display panel according to claim 11, wherein the difference between the second luminance and the initial luminance of the first color sub-pixel b is greater than one of the difference between the fourth luminance and the initial luminance of the second color sub-pixel b and the difference between the sixth luminance and the initial luminance of the third color sub-pixel b, and the light emitting color of the first color sub-pixel b is green.
14. The display panel according to claim 12, wherein the fourth luminance and the sixth luminance are both zero.
15. The display panel of claim 14, wherein the first color sub-pixel b, the second color sub-pixel b, and the third color sub-pixel b form a diamond shape.
16. The display panel according to claim 6,
in the second stage of the low gray scale picture, the first color sub-pixels B emit light in the display picture parts of different frames, and the ith frame picture between every two adjacent frames is at least partially different from the first color sub-pixels emitting light in the ith +/-1 frame, wherein i is a positive integer greater than 1.
17. A display device comprising the display panel according to any one of claims 1 to 16.
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