CN117854418A - Display panel and display device - Google Patents

Abstract

The invention provides a display panel and a display device, comprising: the optical compensation module is used for receiving and respectively compensating the first initial signal and the second initial signal into a first gray-scale signal to be adjusted and a second gray-scale signal to be adjusted; the first adjusting module is used for receiving and respectively adjusting the first gray-scale signal to be adjusted and the second gray-scale signal to be adjusted (smaller than the first gray-scale signal to be adjusted) into a first transition gray-scale signal (larger than or equal to the first gray-scale signal to be adjusted) and a second transition gray-scale signal (larger than or equal to the second gray-scale signal to be adjusted); the overdrive module is used for receiving and respectively compensating the first transition gray-scale signal and the second transition gray-scale signal into a third gray-scale signal to be adjusted and a fourth gray-scale signal to be adjusted, and the difference between the first transition gray-scale signal and the first gray-scale signal to be adjusted is larger than the difference between the second transition gray-scale signal and the second gray-scale signal to be adjusted so as to improve the charging efficiency, the uneven brightness and the phenomenon of 'water mark' of the display panel.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a display device.

Background

In the current display panel, the cost of the source electrode driving chip of the display panel is reduced by adopting a tri-gate driving architecture to reduce the number of data lines to 1/3 of that of a normal driving architecture.

However, the number of scan lines in the tri-gate driving architecture is increased by 3 times as large as that of the normal driving architecture, so that the width and charging time of each gate pulse are reduced to 1/3 of that of the normal driving architecture, and the problem of the insufficient charging is generally solved by adopting an overdrive compensation mode; however, the display panel also has a problem of uneven gray-scale display due to the process, and the like, and is generally improved by adopting an optical compensation method. On the basis of original optical compensation, if the larger overdrive compensation amount is overlapped in the same compensation direction, the compensation amount difference between the corresponding sub-pixel and the adjacent sub-pixel is larger, so that the luminance difference of the two luminescence is larger, the water mark phenomenon is caused, and the image quality is reduced.

Therefore, the existing optical compensation and overdrive compensation mode has the problems, and improvement is needed.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which are used for solving the technical problem of water mark phenomenon caused by the existing optical compensation and overdrive compensation mode.

The embodiment of the invention provides a display panel, which comprises:

the optical compensation module is used for receiving a first initial signal and a second initial signal, compensating the first initial signal into a first gray-scale signal to be adjusted, and compensating the second initial signal into a second gray-scale signal to be adjusted;

the first adjusting module is used for receiving the first gray-scale signal to be adjusted and the second gray-scale signal to be adjusted, adjusting the first gray-scale signal to be adjusted into a first transition gray-scale signal, and adjusting the second gray-scale signal to be adjusted into a second transition gray-scale signal, wherein the value of the first transition gray-scale signal is larger than or equal to that of the first gray-scale signal to be adjusted, and the value of the second transition gray-scale signal is larger than or equal to that of the second gray-scale signal to be adjusted;

the overdrive module is used for receiving the first transition gray-scale signal and the second transition gray-scale signal, compensating the first transition gray-scale signal into a third gray-scale signal to be regulated, and compensating the second transition gray-scale signal into a fourth gray-scale signal to be regulated;

and if the value of the first gray-scale signal to be adjusted is smaller than that of the second gray-scale signal to be adjusted, the difference between the value of the first transition gray-scale signal and the corresponding value of the first gray-scale signal to be adjusted is larger than that between the value of the second transition gray-scale signal and the corresponding value of the second gray-scale signal to be adjusted.

In an embodiment, the value of any of the first gray-scale signals to be adjusted is smaller than a first value, and the first value is larger than a second value;

the value of the first transition gray-scale signal corresponding to the first gray-scale signal to be adjusted, which is equal to the second value, is greater than or equal to the first value.

In one embodiment, the first value is greater than or equal to 15 and less than 20, and the second value is greater than or equal to 10 and less than 15.

In an embodiment, the display panel further includes:

the second adjusting module is used for receiving the third gray-scale signal to be adjusted and the fourth gray-scale signal to be adjusted, converting the third gray-scale signal to be adjusted into a first voltage signal based on a first gamma curve, and converting the fourth gray-scale signal to be adjusted into a second voltage signal based on a second gamma curve;

the first gamma value corresponding to the first gamma curve is smaller than the second gamma value corresponding to the second gamma curve.

In an embodiment, the display panel further includes:

the panel main body is electrically connected to the second adjusting module and comprises a first pixel unit and a second pixel unit, wherein the first pixel unit emits light under the action of the first voltage signal, and the second pixel unit emits light under the action of the second voltage signal.

In one embodiment, the display panel includes a plurality of pixel units;

the first adjusting module is used for adjusting the brightness and the chromaticity of the pixel units corresponding to the first gray-scale signals to be adjusted and the brightness and the chromaticity of the pixel units corresponding to the second gray-scale signals to be adjusted.

In an embodiment, the pixel unit includes a first sub-pixel and a second sub-pixel having different colors;

the first adjustment module is configured to adjust the first to-be-adjusted gray-scale signal to the corresponding first transition gray-scale signal based on a first mapping relationship when the first to-be-adjusted gray-scale signal corresponds to the first sub-pixel, and adjust the first to-be-adjusted gray-scale signal to the corresponding first transition gray-scale signal based on a second mapping relationship when the first to-be-adjusted gray-scale signal corresponds to the second sub-pixel.

In an embodiment, the overdrive module includes an overdrive mapping table, where the overdrive mapping table includes a value of each first transition gray-scale signal, a value of each start gray-scale signal, and a plurality of overdrive compensation values, and each overdrive compensation value is set corresponding to a value of one first transition gray-scale signal and a value of a corresponding start gray-scale signal;

The overdrive module generates a corresponding third gray-scale signal to be adjusted according to the first transition gray-scale signal and the corresponding overdrive compensation value based on the overdrive mapping table under the same value of the initial gray-scale signal;

the values of the plurality of first transition gray-scale signals in the mapping table are sequentially ordered according to the magnitude relation, and the values of the plurality of initial gray-scale signals in the mapping table are sequentially ordered according to the magnitude relation;

and under the condition that the same value of the initial gray-scale signal is smaller than the value of the initial gray-scale signal, and the absolute value of the difference value of the two corresponding driving compensation values is smaller than or equal to 3, the two values of the two adjacent first transition gray-scale signals are smaller than the value of the initial gray-scale signal.

In an embodiment, when the value of the initial gray-scale signal is equal to or greater than 192, the values of the initial gray-scale signal are both smaller than 192, and the absolute value of the difference between the two corresponding overdrive compensation values is equal to or smaller than 3;

wherein, two values of the two adjacent first transition gray scales are in a preset range, and two end point values of the preset range are 16 and 32 respectively.

The embodiment of the invention also provides a display device comprising the display panel.

The invention provides a display panel and a display device, comprising: the optical compensation module is used for receiving a first initial signal and a second initial signal, compensating the first initial signal into a first gray-scale signal to be adjusted, and compensating the second initial signal into a second gray-scale signal to be adjusted; the first adjusting module is used for receiving the first gray-scale signal to be adjusted and the second gray-scale signal to be adjusted, adjusting the first gray-scale signal to be adjusted into a first transition gray-scale signal, and adjusting the second gray-scale signal to be adjusted into a second transition gray-scale signal, wherein the value of the first transition gray-scale signal is larger than or equal to that of the first gray-scale signal to be adjusted, and the value of the second transition gray-scale signal is larger than or equal to that of the second gray-scale signal to be adjusted; the overdrive module is used for receiving the first transition gray-scale signal and the second transition gray-scale signal, compensating the first transition gray-scale signal into a third gray-scale signal to be regulated, and compensating the second transition gray-scale signal into a fourth gray-scale signal to be regulated; if the value of the first to-be-adjusted gray-scale signal is smaller than the value of the second to-be-adjusted gray-scale signal, the first adjusting module is configured to realize that the difference between the value of the first transition gray-scale signal and the corresponding value of the first to-be-adjusted gray-scale signal is larger than the difference between the value of the second transition gray-scale signal and the corresponding value of the second to-be-adjusted gray-scale signal, so as to improve the charging efficiency, the uneven brightness and the water mark phenomenon of the display panel.

Drawings

The invention is further illustrated by the following figures. It should be noted that the drawings in the following description are only for illustrating some embodiments of the invention, and that other drawings may be obtained from these drawings by those skilled in the art without the inventive effort.

Fig. 1 is a block diagram of a display panel according to an embodiment of the present invention.

Fig. 2 is a block diagram of another display panel according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of various gamma curves according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

The terms "first," "second," and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Embodiments of the present invention provide display panels including, but not limited to, the following embodiments and combinations between the following embodiments.

In one embodiment, as shown in fig. 1, the display panel 100 includes: the optical compensation module 10 is configured to receive a first initial signal Vgr10 and a second initial signal Vgr20, compensate the first initial signal Vgr10 into a first gray-scale signal Vgr11 to be adjusted, and compensate the second initial signal Vgr20 into a second gray-scale signal Vgr21 to be adjusted; the first adjusting module 20 is configured to receive the first to-be-adjusted gray-scale signal Vgr11 and the second to-be-adjusted gray-scale signal Vgr21, adjust the first to-be-adjusted gray-scale signal Vgr11 to a first transition gray-scale signal Vgr12, and adjust the second to-be-adjusted gray-scale signal Vgr21 to a second transition gray-scale signal Vgr22, where a value of the first transition gray-scale signal Vgr12 is greater than or equal to a value of the first to-be-adjusted gray-scale signal Vgr11, and a value of the second transition gray-scale signal Vgr22 is greater than or equal to a value of the second to-be-adjusted gray-scale signal Vgr21; the overdrive module 30 is configured to receive the first transition gray-scale signal Vgr12 and the second transition gray-scale signal Vgr22, and compensate the first transition gray-scale signal Vgr12 to be the third gray-scale signal Vgr13 to be adjusted, and compensate the second transition gray-scale signal Vgr22 to be the fourth gray-scale signal Vgr23 to be adjusted; if the value of the first to-be-adjusted gray-scale signal Vgr11 is smaller than the value of the second to-be-adjusted gray-scale signal Vgr21, the difference between the value of the first transition gray-scale signal Vgr12 and the corresponding value of the first to-be-adjusted gray-scale signal Vgr11 is larger than the difference between the value of the second transition gray-scale signal Vgr22 and the corresponding value of the second to-be-adjusted gray-scale signal Vgr 21.

The display panel 100 may be a liquid crystal display panel or a self-luminous display panel, and may include a plurality of pixel units, each of which may include a first sub-pixel and a second sub-pixel having different colors, and may include a third sub-pixel having another color, regardless of the type of the display panel 100. When the gray scale values of the plurality of sub-pixels with different colors in the pixel unit are the same, the pixel unit can be considered to emit light to be gray, the gray scale values of all the sub-pixels with different colors are further controlled to be the same, the whole picture is a gray scale picture, and the higher the gray scale value is, the higher the brightness of the gray scale picture is.

It should be noted that, due to the difference of the panel process and the materials, even if all the pixel units are at the same gray level, each sub-pixel can be loaded with the data voltage corresponding to the gray level, but the brightness of the light emitted by the pixel units at different positions is different, so that the gray level picture appears as a dark spot or a bright spot at the corresponding position, which affects the image quality.

The optical compensation module 10 in this embodiment can compensate for the dark spots or bright spots of the gray-scale frame to improve the uniformity of the gray-scale frame. Specifically, the first initial signal Vgr10 and the second initial signal Vgr20 may be gray-scale signals with different gray-scale values, the optical compensation module 10 may compensate the two according to the bright and dark point conditions of the gray-scale images respectively presented after the data voltages corresponding to the two act on the display panel, and the gray-scale images respectively presented after the data voltages corresponding to the first to-be-adjusted gray-scale signal Vgr11 and the second to-be-adjusted gray-scale signal Vgr21 act on the display panel may be regarded as improvement.

The first adjusting module 20 is configured to adjust the luminance and the chromaticity of the pixel units corresponding to the first to-be-adjusted gray-scale signals Vgr11 and the luminance and the chromaticity of the pixel units corresponding to the second to-be-adjusted gray-scale signals Vgr21, as shown in fig. 1. Specifically, the pixel unit includes a first sub-pixel and a second sub-pixel having different colors, and considering the material difference and the color difference of the first sub-pixel and the second sub-pixel, it is considered that the brightness of the light emitted by the first sub-pixel and the second sub-pixel is different even under the action of the data voltage corresponding to the same gray scale value. Therefore, the first adjusting module 20 can adjust the brightness and the chromaticity of the pixel units corresponding to the first gray-scale signal Vgr11 to be adjusted, and also can adjust the brightness and the chromaticity of the pixel units corresponding to the second gray-scale signal Vgr21 to be adjusted, so as to adjust the brightness and the chromaticity of each pixel unit, so as to reduce the risk of color shift after the pixel units emit light, and thus reduce the risk of color shift of the display picture (whether the display picture is a gray-scale picture or a color picture).

Specifically, as shown in fig. 1, the first adjusting module 20 is configured to adjust the first to-be-adjusted gray-scale signal Vgr11 to the corresponding first transition gray-scale signal Vgr12 based on a first mapping relationship when the first to-be-adjusted gray-scale signal Vgr11 corresponds to the first sub-pixel, and adjust the first to-be-adjusted gray-scale signal Vgr11 to the corresponding first transition gray-scale signal Vgr12 based on a second mapping relationship when the first to-be-adjusted gray-scale signal Vgr11 corresponds to the second sub-pixel.

For convenience of description, a third sub-pixel in which the pixel unit may further include another color is taken as an example, wherein the colors of the first sub-pixel, the second sub-pixel, and the third sub-pixel may be red, green, and blue, respectively. Similarly, when the first gray-scale signal Vgr11 to be adjusted corresponds to the third sub-pixel, the first adjusting module 20 is further configured to adjust the first gray-scale signal Vgr11 to be adjusted to the corresponding first transition gray-scale signal Vgr12 based on the third mapping relationship.

Similarly, when the second gray-scale signal Vgr21 to be adjusted corresponds to the first sub-pixel, the corresponding second transition gray-scale signal Vgr22 should be obtained according to the first mapping relationship; when the second gray-scale signal Vgr21 to be adjusted corresponds to the second sub-pixel, the corresponding second transition gray-scale signal Vgr22 should be obtained according to the second mapping relationship; when the second gray-scale signal Vgr21 to be adjusted corresponds to the third sub-pixel, the corresponding second transition gray-scale signal Vgr22 should be obtained according to the third mapping relationship.

By analogy, after the first adjusting module 20 receives any one of the gray-scale signals to be adjusted, the corresponding mapping relationship is adopted to adjust the gray-scale signal to be adjusted into a transition gray-scale signal that acts on the sub-pixel according to the type information of the sub-pixel corresponding to the gray-scale signal to be adjusted (which may be included in the gray-scale signal to be adjusted, for example, by the numerical representation of some positions in the gray-scale signal to be adjusted).

Specifically, as shown in table 1, the "Gray" may be a range of Gray values corresponding To the first To-be-adjusted Gray-scale signal Vgr11 and the second To-be-adjusted Gray-scale signal Vgr21 compensated by the optical compensation module 10, where only 17 Gray-scale values of 0, 1, 2 and … … are illustrated, and R, G, B in the "To be" may be a Gray-scale value corresponding To the first sub-pixel, a Gray-scale value corresponding To the second sub-pixel and a Gray-scale value corresponding To the third sub-pixel obtained after the adjustment by the first adjustment module 20 according To the first mapping relationship, the second mapping relationship and the third mapping relationship in the present invention, respectively. The R, G, B in "As" may be the gray-scale value corresponding to the first sub-pixel, the gray-scale value corresponding to the second sub-pixel, and the gray-scale value corresponding to the third sub-pixel obtained by adjusting according to the existing first relationship (different from the first mapping relationship of the present invention), the second relationship (different from the second mapping relationship of the present invention), and the third relationship (different from the third mapping relationship of the present invention) respectively via the first adjusting module in the prior art.

TABLE 1

As discussed above, in this embodiment, the value of the first transition gray-scale signal Vgr12 is greater than or equal to the value of the first to-be-adjusted gray-scale signal Vgr11, and the value of the second transition gray-scale signal Vgr22 is greater than or equal to the value of the second to-be-adjusted gray-scale signal Vgr21, that is, the value of the first to-be-adjusted gray-scale signal is increased or unchanged after the first adjustment module 20 receives any to-be-adjusted gray-scale signal, so as to obtain the corresponding transition gray-scale signal. It can be observed that, in table 1, taking the first gray-scale signal Vgr11 To be adjusted as an example, the value (corresponding gray-scale value) of the first transition gray-scale signal Vgr12 of the sub-pixel, that is, any one of R, G, B in "To be", is larger than the value (corresponding gray-scale value) of the first gray-scale signal Vgr11 To be adjusted, regardless of the first mapping relationship, the second mapping relationship or the third mapping relationship.

Of course, even the first, second, and third relationships in the prior art may satisfy any of the values R, G, B in "As" and be greater than or equal to the value of "Gray" at this time.

Further, the first adjusting module 20 in the present embodiment is further configured to: if the value of the first to-be-adjusted gray-scale signal Vgr11 is smaller than the value of the second to-be-adjusted gray-scale signal Vgr21, the difference between the value of the corresponding first transition gray-scale signal Vgr12 and the value of the corresponding first to-be-adjusted gray-scale signal Vgr11 is larger than the difference between the value of the second transition gray-scale signal Vgr22 and the value of the corresponding second to-be-adjusted gray-scale signal Vgr 21.

For example, when the value "Gray" of the first Gray-scale signal Vgr11 To be adjusted is equal To any one of 0 To 16, the difference between any one of R, G, B of the corresponding "To be" and "Gray" is larger, and even when the value "Gray" of the first Gray-scale signal Vgr11 To be adjusted is equal To 10 To 16, the corresponding difference can reach 20 To 30; for example, the value "Gray" of the second Gray-scale signal Vgr21 To be adjusted is larger than any one of the values 16 (table 1 is schematic), and it can be considered that the difference between any one of R, G, B in the corresponding "To be" and "Gray" is smaller, and the "difference" corresponding To the first Gray-scale signal Vgr11 is satisfied.

Specifically, it can be understood that, after "Gray" is greater than 16 in the present embodiment, although it is satisfied that any one of R, G, B in "To be" is greater than "Gray", as "Gray" increases, the magnitude of any one of R, G, B in "To be" increases gradually decreases, and the closer To the current "Gray", the specific degree of approach can refer To the degree of difference of any one of R, G, B in "As" from the corresponding "Gray".

In summary, compared with R, G, B in "As", in this embodiment, the value of the first transition gray-scale signal Vgr12 corresponding to the first gray-scale signal Vgr11 to be adjusted with a smaller value (corresponding to a low gray-scale) is compared with the larger value of the increase setting of the value of the first gray-scale signal Vgr11 to be adjusted, and the value of the second transition gray-scale signal Vgr22 corresponding to the second gray-scale signal Vgr21 to be adjusted with a larger value (corresponding to a middle and high gray-scale) is compared with the smaller value of the increase setting of the value of the second gray-scale signal Vgr21 to be adjusted.

Further, if the first transition gray-scale signal Vgr12 and the second transition gray-scale signal Vgr22 output by the first adjustment module 20 directly act on the corresponding sub-pixels, the influence of the gray-scale values of the sub-pixels in the same column and the previous row on the charging efficiency of the sub-pixels in the current row is not considered, and when the difference between the two gray-scale values of the sub-pixels in the two rows is large, the charging efficiency of the sub-pixels in the next row is slow.

Therefore, the embodiment further includes an overdrive module 30 for compensating the first transition gray-scale signal Vgr12 and the second transition gray-scale signal Vgr22, where the gray-scale values of the third to-be-adjusted gray-scale signal Vgr13 and the fourth to-be-adjusted gray-scale signal Vgr23 obtained after compensation respectively act on the corresponding sub-pixels, which can be considered to improve the charging efficiency of the sub-pixels.

Specifically, as shown in table 2, the overdrive mapping table is used for the overdrive module 30 to work, and includes a value of each first transition gray-scale signal Vgr12, a value of each start gray-scale signal VS, and a plurality of overdrive compensation values OD, where each overdrive compensation value OD is set corresponding to a value of one first transition gray-scale signal Vgr12 and a value of one start gray-scale signal VS; under the same value of the initial gray-scale signal VS, the overdrive module 30 generates the corresponding third gray-scale signal Vgr13 to be adjusted according to the first transition gray-scale signal Vgr12 and the corresponding overdrive compensation value OD based on the overdrive mapping table.

The value of the initial gray-scale signal VS may be understood as a gray-scale value corresponding to a sub-pixel in a previous row of the two rows of sub-pixels in the same column, and the first transition gray-scale signal Vgr12 may be understood as a gray-scale value corresponding to a sub-pixel in a next row of the two rows of sub-pixels in the same column, and then the gray-scale value corresponding to the sub-pixel in the next row after compensation should correspond to the overdrive compensation value OD as a value superimposed to the first transition gray-scale signal Vgr12 (i.e., a value of the third gray-scale signal Vgr13 to be adjusted) under the corresponding initial gray-scale signal VS.

TABLE 2

It should be noted that, in table 2, only partial values of the initial gray-scale signal VS and the first transition gray-scale signal Vgr12 and a plurality of corresponding overdrive compensation values OD are listed, if the actual value of the initial gray-scale signal VS or the value of the first transition gray-scale signal Vgr12 is between two adjacent values in table 2, the corresponding overdrive compensation value OD may also be obtained by linear interpolation based on table 2.

Further, as shown in table 3, the degree of "stain sensitivity" and the degree of "water mark sensitivity" of the display panel at different "gray scale values" may be expressed. The phenomenon compensated by the optical compensation module 10 may be referred to as "stain" herein, and when the first adjustment module 20 performs compensation in the same direction and with a larger amplitude on the basis of the optical compensation module 10, the brightness difference of the light emission of the two adjacent rows of sub-pixels is too large, which appears as "water stain". The "stain sensitivity" is low at the lowest gray level [0, 10), high at the next lower gray level [10, 16), lower gray level [16,32 ], and medium-high gray level [32,255], and high at the lowest gray level [0, 10), lower gray level [10, 16), medium-high at the lower gray level [16,32 ], and low at the medium-high gray level [32,255 ].

TABLE 3 Table 3

Gray scale value	Stain sensitivity	Sensitivity to water mark
			[0,10)	Low and low	High height
[10,16)	High height	High height
			[16,32)	High height	In (a)
[32,255]	High height	Low and low

Specifically, in the present invention, optical compensation may not be performed at the lowest gray level [0,10 ] (due to low "stain sensitivity"), that is, the optical compensation module 10 may not perform processing when the gray level of the received initial signal is at [0,10 ") so as to output a signal to be adjusted with unchanged gray level, and even when the" water stain sensitivity "is high, no obvious" water stain "is caused due to the compensation performed by the first adjustment module 20; optical compensation can be performed normally (due to high "stain sensitivity") at the middle-high gray level [32,255], and the first adjusting module 20 will not have a great influence on the compensation due to low "water stain sensitivity"; the difference between the lower gray levels [16,32 ] and the middle and high gray levels [32,255] is that the water mark sensitivity is middle, the absolute value of the compensation coefficient in the first adjusting module 20 can be reduced to reduce the brightness difference of the light emission of two adjacent rows of sub-pixels; however, the difference between the lower gray levels [10,16 ] and the lower gray levels [16,32 ] is that the "water mark sensitivity" is also high, and at this time, not only the optical compensation is required (since the "stain sensitivity" is high), but also the "water mark sensitivity" is considered to be high, so that the installation space of the compensation coefficient in the first adjustment module 20 is small, and the improvement of the charging efficiency, the improvement of the brightness non-uniformity and the improvement of the "water mark" phenomenon cannot be simultaneously achieved.

It should be noted that the gradation of the gray scale in table 3 is not limited to the gradation of the gray scale of the display panel in the present invention, and is intended to indicate that the above-described problem may exist when the gray scale is low.

As can be understood from the discussion in tables 1 to 3, in summary, in the embodiment, the value of the first transition gray-scale signal Vgr12 corresponding to the first gray-scale signal Vgr11 to be adjusted with a smaller value (corresponding to a low gray-scale) is compared with the value of the first transition gray-scale signal Vgr11 to be adjusted with a larger value, so that the value of the first gray-scale signal Vgr11 to be adjusted input to the first adjusting module 20 is even smaller, and the first adjusting module 20 can generate the first transition gray-scale signal Vgr12 corresponding to the first sub-pixel, the second sub-pixel or the third sub-pixel with a significantly increased value according to the corresponding first mapping relationship, the second mapping relationship or the third mapping relationship; further, when the gray-scale value of the previous sub-pixel in the two rows of sub-pixels (i.e. the initial gray-scale signal VS in table 2) is larger (at least larger than the current first To-be-adjusted gray-scale signal Vgr11, for example, may be larger than or equal To 192), the value of the first To-be-adjusted gray-scale signal Vgr12 received by the overdrive module 30 is larger, so that the range of the corresponding overdrive compensation value OD is larger, as long As the first To-be-adjusted gray-scale signal Vgr12 is larger than or equal To 0 after being overlapped with the overdrive compensation value OD, the value of the first To-be-adjusted gray-scale signal Vgr11 (for example, the gray-scale value is [10,16 ]) in table 3 corresponding To the "As" in table 1 can be raised To the value of the first To-be-adjusted gray-scale signal Vgr11 (for example, the gray-scale value is [10,16 ]) in table 1), so that the sensitivity in the table 1 is not increased, and the water mark can be even improved, and the water mark in the first stage is not improved, and the water mark can be even improved.

In comparison, if the existing smaller value "As" in table 1 is directly used to transmit to the overdrive module 30, the value (negative number) range of the overdrive compensation value OD corresponding to table 2 is smaller, which causes the problem that the "water mark sensitivity" and the "stain sensitivity" in table 3 are both high.

In an embodiment, the value of any of the first gray-scale signals Vgr11 to be adjusted is smaller than a first value, and the first value is larger than a second value; wherein the value of the corresponding first transition gray-scale signal Vgr12 of the first to-be-adjusted gray-scale signal Vgr11, which is equal to the second value, is greater than or equal to the first value. The range of the first gray-scale signal Vgr11 to be adjusted may at least include a second value to a first value, that is, the first transition gray-scale signal Vgr12 corresponding to the second value is compared with the second value, and the first transition gray-scale signal Vgr12 corresponding to a value smaller than and close to the first value is increased compared with the first value.

Further, in the embodiment, the value of the first transition gray-scale signal Vgr12 corresponding to the second value is required to be larger than the first value, that is, the value of the first to-be-adjusted gray-scale signal Vgr11 is at least from the second value, and the corresponding value of the first transition gray-scale signal Vgr12 input to the overdrive module 30 is at least larger than the second value (larger than any first to-be-adjusted gray-scale signal Vgr 11), so that the setting range of the compensation coefficient in the overdrive module 30 can be larger after each first to-be-adjusted gray-scale signal Vgr11 passes through the first adjustment module 20, and the risk of the improvement of the charging efficiency, the improvement of the uneven brightness and the phenomenon of "water mark" can be reduced.

Specifically, as can be seen from the above discussion about table 3, if the "water mark sensitivity" and the "stain sensitivity" of the gray level values in the next lower gray level [10,16 ] are considered to be high, since the larger the first gray level signal Vgr11 to be adjusted is, the larger the corresponding first transition gray level signal Vgr12 will be, the first transition gray level signal Vgr12 corresponding to the first gray level signal Vgr11 to be adjusted equal to 10 is only required to be set to be the lower gray level [16,32 ] in the transition of the "water mark sensitivity" in table 3, and therefore the first transition gray level signal Vgr12 corresponding to the first gray level signal Vgr11 to be equal to 10 is at least greater than or equal to the minimum value 16 in the lower gray level [16,32 ").

In contrast to the previous discussion regarding the first and second values, it can be considered that based on the specific examples of tables 2, 3, the first value is equal to 16 and the second value is equal to 10. Of course, the first value and the second value in the present invention are not limited to the above two values, and may have respective value ranges, where the first value may be greater than or equal to 15 and less than 20, and the second value may be greater than or equal to 10 and less than 15. In particular, the first value may be understood as the gray level corresponding to the level of "water mark sensitivity" when the level of "stain sensitivity" is high, and the second value may be understood as the gray level corresponding to the level of "stain sensitivity" when the level of "water mark sensitivity" is high.

Further, referring to table 2, the values of the plurality of first transition gray-scale signals Vgr12 in the overdrive mapping table are sequentially ordered according to the magnitude relation, and the values of the plurality of start gray-scale signals VS in the overdrive mapping table are sequentially ordered according to the magnitude relation; and under the condition that the same value of the initial gray-scale signal VS is smaller than the value of the initial gray-scale signal VS and two values of two adjacent first transition gray-scale signals Vgr12, the absolute value of the difference value of the corresponding two overdrive compensation values OD is smaller than or equal to 3.

As can be seen from the above discussion, by reasonably setting "To be" in table 1 followed by the first adjustment module 20, the setting range of the compensation coefficient in the overdrive module 30 can be larger after the first gray-scale signal Vgr11 To be adjusted with smaller value passes through the first adjustment module 20; in this embodiment, based on the overdrive module 30 having obtained the first transition gray-scale signal Vgr12 corresponding to the first gray-scale signal Vgr11 to be adjusted and having a larger value, the absolute value of the difference between the adjacent two is set smaller, for example, is set to be less than or equal to 3 here, in a plurality of overdrive compensation values OD corresponding to the same larger starting gray-scale signal VS (at least greater than the maximum value of the first transition gray-scale signal Vgr 12).

It can be understood that, in general, in two adjacent columns of sub-pixels, the gray-scale values of the two sub-pixels located in the same row of sub-pixels are similar, if the gray-scale values (corresponding to the initial gray-scale signal VS in table 2) of the two sub-pixels in the adjacent column of the row of sub-pixels are both larger, and the gray-scale values (corresponding to the first transition gray-scale signal Vgr12 in table 2) of the two sub-pixels in the adjacent column of the row are smaller but have a difference, for example, the difference of the two overdrive compensation values OD of the two adjacent first transition gray-scale signals Vgr12 in the overdrive mapping table corresponding to the same initial gray-scale signal VS is smaller, so that the difference of the actual gray-scale values of the two sub-pixels in the adjacent column of the row is also smaller, and the phenomenon of "water mark" is further improved.

Based on the specific embodiments of table 1, table 2, and table 3, when the value of the initial gray-scale signal VS is equal to or greater than 192, the values of the initial gray-scale signal VS are smaller than 192, and the absolute value of the difference between the two corresponding overdrive compensation values OD is equal to or smaller than 3; wherein, two values of the adjacent two first transition gray-scale signals Vgr12 are in a preset range, and two end point values of the preset range are 16 and 32 respectively.

Referring to the discussion of table 1, it can be seen that the present invention can implement the first transition gray-scale signal Vgr12 (at least greater than or equal to 33 in table 1) that at least the first gray-scale signal Vgr11 to be adjusted at [10,16 ] is adjusted to a value at least greater than or equal to 16 by the first adjusting module 20; referring to the discussion of tables 2 and 3, it can be seen that the absolute value of the difference between two adjacent overdrive compensation values OD of the first transition gray-level signal Vgr12 having a value at least greater than or equal to 16 (at least satisfying at [16,32 ]) in the overdrive mapping table is smaller than 3 at the same start gray-level signal VS having a value greater than or equal to 192, for example, when the first transition gray-level signal Vgr12 is 16, 24, and 32, respectively, the overdrive compensation values OD based on the start gray-level signal VS being 192 are (-9), (-11), (-14), and the overdrive compensation values OD based on the start gray-level signal VS being 255 are (-13), (-15), and (-16), respectively.

In one embodiment, as shown in fig. 2, the display panel 100 further includes: a second adjustment module 40, configured to receive the third to-be-adjusted gray-scale signal Vgr13 and the fourth to-be-adjusted gray-scale signal Vgr23, as shown in fig. 3, and convert the third to-be-adjusted gray-scale signal Vgr13 into a first voltage signal Vgr14 based on a first gamma curve L01, and convert the fourth to-be-adjusted gray-scale signal Vgr23 into a second voltage signal Vgr24 based on a second gamma curve L02; the first gamma value gam1 corresponding to the first gamma curve L01 is smaller than the second gamma value gam2 corresponding to the second gamma curve L02.

It should be noted that, as shown in fig. 2, the digital signals received and outputted by the optical compensation module 10, the first adjusting module 20 and the overdrive module 30 are all digital signals including a plurality of binary numbers, and are also represented by the gray scale values, and further the second adjusting module herein is required to convert the third gray scale signal Vgr13 and the fourth gray scale signal Vgr23 to be adjusted into two analog signals of the first voltage signal Vgr14 and the second voltage signal Vgr24, respectively, and the values thereof are respectively indicative of the magnitudes of the data voltages applied to the sub-pixels.

Specifically, as shown in fig. 3, the abscissa of the gamma curve may represent the percentage G of the gray-scale value (for example, the value of the third gray-scale signal Vgr13 to be adjusted and the value of the fourth gray-scale signal Vgr23 to be adjusted) and the maximum value of the corresponding sub-pixel, the ordinate of the gamma curve represents the percentage T of the luminance value of the sub-pixel that emits light under the action of the voltage value corresponding to the gray-scale value and the maximum value thereof, and it may be considered that the relationships between T and G in different gamma curves (for example, L1, L2, L3, L4, L5) are different, but each gamma curve may be considered to conform to the power function expression of t=g++gam, and gam values of different curves are different. For example, in fig. 3, the gam values corresponding to L1, L2, L3, L4, and L5 are 3.3, 2.2, 1, 0.455, and 0.3 in order, respectively, and it is known from the characteristics of the exponential function that the smaller the gam value, the more convex the gamma curve, and conversely, the more concave the gamma curve.

Here, it is considered that the luminance value of the light emitted by the same subpixel is linearly related to the data voltage applied thereto, and the two are considered to be directly proportional to each other for convenience of description, that is, the ordinate T in fig. 3 may be understood as the corresponding data voltage.

In particular, when the relationship between the luminance value and the gray-scale value (which may be equivalent to the relationship between T and G in fig. 3) is set based on the human eye characteristics, the corresponding gamma curve is the standard gamma curve (for example, L2, which may have a gam value equal to 2.2), that is, the luminance value and the change thereof in the standard gamma curve L2 may be considered to be the luminance value and the change thereof corresponding to the gray-scale value and the change thereof recognized by the human eye.

As can be appreciated, in the present embodiment, considering that the first adjustment module 20 increases the smaller first gray-level signal Vgr11 to be adjusted to the larger first transition gray-level signal Vgr12 (which is far greater than the value corresponding to "As" in table 1), so that the value of the third gray-level signal Vgr13 to be adjusted received by the second adjustment module 40 is larger than the value adjusted by the overdrive module 30, the second adjustment module 40 is set in the present embodiment, so that, for the third gray-level signal Vgr13 to be adjusted and the fourth gray-level signal Vgr23 to be adjusted, the corresponding first voltage signal Vgr14 and the corresponding second voltage signal Vgr24 are generated based on the luminance values corresponding to the first gamma curve L01 and the second gamma curve L02 respectively (the first voltage signal Vgr14 and the second voltage signal Vgr24 can be considered to act on the corresponding luminance value), and the first gamma value gam1 corresponding to the first gamma curve L01 is smaller than the first gamma value gam1, the second gamma value corresponding to the second gamma curve L2 is also smaller than the first gamma curve L2, the gamma value corresponding to the second gamma curve L1 can be adjusted, the gamma value is smaller than the first gamma curve L2 and the gamma curve 1 is more than the second gamma curve 1, the gamma value is smaller than the first gamma curve 1, the gamma curve 1 is more than the gamma curve 1, and the gamma curve 1 is more than the gamma curve 1 is adjusted to be adjusted to the first gamma curve 2, and the gamma value is 2, and the gamma curve is 2 is 3, and the gamma value is 3, and the gamma is 3 is 2 is adjusted to the lower to the luminance and is 2 and is 2 and is lower to the luminance and the luminance, the value of the first voltage signal Vgr14 is smaller than the value of the voltage signal generated by the second gamma curve L02 corresponding to the larger second gamma value gam2, so As to cancel the larger amount of the previous third gray-scale signal Vgr13 to be adjusted, so As to ensure that the brightness value finally applied to the sub-pixel can still be close to the brightness value after the processing of the corresponding data "As" in table 1 and the standard gamma curve L2 in fig. 3.

In summary, by reasonably setting tables 1 and 2 and the first gamma curve L01, the improvement of the charging efficiency, the improvement of the uneven brightness and the improvement of the "water mark" phenomenon of the display panel can be achieved, and the brightness of the light emitted by the display panel is still combined with the human eye characteristic.

Further, as shown in fig. 2, the display panel 100 may further include: the panel main body 50 is electrically connected to the second adjusting module 40, and includes a plurality of pixel units P, where the plurality of pixel units P includes a first pixel unit and a second pixel unit, the first pixel unit emits light under the action of the first voltage signal Vgr14, and the second pixel unit emits light under the action of the second voltage signal Vgr24.

In fig. 2, an array of a plurality of pixel units P is only taken as an example, but the arrangement of the plurality of pixel units P and specific positions of the first pixel unit and the second pixel unit are not limited in this embodiment, and only difference is that the first voltage signal Vgr14 and the second voltage signal Vgr24 are respectively applied to the two. In particular, each pixel unit may include a plurality of sub-pixels, where the first voltage signal Vgr14 and the second voltage signal Vgr24 may be applied to the sub-pixels of different pixel units. Further, each sub-pixel of each pixel unit can be loaded with a corresponding voltage signal (i.e. a data voltage) to emit light respectively, so that the display panel 100 presents a complete display screen.

It can be understood that, since any two pixel units in the present embodiment can be understood as the first pixel unit and the second pixel unit, and the first voltage signal Vgr14 and the second voltage signal Vgr24 respectively loaded are processed by the foregoing process, the improvement of the charging efficiency, the improvement of the uneven brightness and the phenomenon of "water mark" of the whole display panel 100 can be achieved, so as to improve the image quality of the display screen.

The invention provides a display panel and a display device, comprising: the optical compensation module is used for receiving a first initial signal and a second initial signal, compensating the first initial signal into a first gray-scale signal to be adjusted, and compensating the second initial signal into a second gray-scale signal to be adjusted; the first adjusting module is used for receiving the first gray-scale signal to be adjusted and the second gray-scale signal to be adjusted, adjusting the first gray-scale signal to be adjusted into a first transition gray-scale signal, and adjusting the second gray-scale signal to be adjusted into a second transition gray-scale signal, wherein the value of the first transition gray-scale signal is larger than or equal to that of the first gray-scale signal to be adjusted, and the value of the second transition gray-scale signal is larger than or equal to that of the second gray-scale signal to be adjusted; the overdrive module is used for receiving the first transition gray-scale signal and the second transition gray-scale signal, compensating the first transition gray-scale signal into a third gray-scale signal to be regulated, and compensating the second transition gray-scale signal into a fourth gray-scale signal to be regulated; if the value of the first to-be-adjusted gray-scale signal is smaller than the value of the second to-be-adjusted gray-scale signal, the first adjusting module is configured to realize that the difference between the value of the first transition gray-scale signal and the corresponding value of the first to-be-adjusted gray-scale signal is larger than the difference between the value of the second transition gray-scale signal and the corresponding value of the second to-be-adjusted gray-scale signal, so as to improve the charging efficiency, the uneven brightness and the water mark phenomenon of the display panel.

The display panel and the display device provided by the embodiments of the present invention are described in detail, and specific examples are applied to illustrate the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understand the technical solution and core ideas of the present invention; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. A display panel, comprising:

the optical compensation module receives a first initial signal and a second initial signal, compensates the first initial signal into a first gray-scale signal to be adjusted, and compensates the second initial signal into a second gray-scale signal to be adjusted;

the first adjusting module is used for receiving the first gray-scale signal to be adjusted and the second gray-scale signal to be adjusted, adjusting the first gray-scale signal to be adjusted into a first transition gray-scale signal and adjusting the second gray-scale signal to be adjusted into a second transition gray-scale signal, wherein the value of the first transition gray-scale signal is larger than or equal to that of the first gray-scale signal to be adjusted, and the value of the second transition gray-scale signal is larger than or equal to that of the second gray-scale signal to be adjusted;

The overdrive module receives the first transition gray-scale signal and the second transition gray-scale signal, compensates the first transition gray-scale signal into a third gray-scale signal to be regulated, and compensates the second transition gray-scale signal into a fourth gray-scale signal to be regulated;

and if the value of the first gray-scale signal to be adjusted is smaller than that of the second gray-scale signal to be adjusted, the difference between the value of the first transition gray-scale signal and the corresponding value of the first gray-scale signal to be adjusted is larger than that between the value of the second transition gray-scale signal and the corresponding value of the second gray-scale signal to be adjusted.

2. The display panel according to claim 1, wherein the value of any one of the first gray-scale signals to be adjusted is smaller than a first value, the first value being larger than a second value;

the value of the first transition gray-scale signal corresponding to the first gray-scale signal to be adjusted, which is equal to the second value, is greater than or equal to the first value.

3. The display panel of claim 2, wherein the first value is greater than or equal to 15 and less than 20 and the second value is greater than or equal to 10 and less than 15.

4. The display panel of claim 1, further comprising:

the second adjusting module is used for receiving the third gray-scale signal to be adjusted and the fourth gray-scale signal to be adjusted, converting the third gray-scale signal to be adjusted into a first voltage signal based on a first gamma curve, and converting the fourth gray-scale signal to be adjusted into a second voltage signal based on a second gamma curve;

the first gamma value corresponding to the first gamma curve is smaller than the second gamma value corresponding to the second gamma curve.

5. The display panel of claim 4, further comprising:

the panel main body is electrically connected to the second adjusting module and comprises a first pixel unit and a second pixel unit, wherein the first pixel unit emits light under the action of the first voltage signal, and the second pixel unit emits light under the action of the second voltage signal.

6. The display panel of claim 1, wherein the display panel comprises a plurality of pixel cells;

the first adjusting module is used for adjusting the brightness and the chromaticity of the pixel units corresponding to the first gray-scale signals to be adjusted and the brightness and the chromaticity of the pixel units corresponding to the second gray-scale signals to be adjusted.

7. The display panel of claim 6, wherein the pixel unit includes first and second sub-pixels having different colors;

the first adjustment module is configured to adjust the first to-be-adjusted gray-scale signal to the corresponding first transition gray-scale signal based on a first mapping relationship when the first to-be-adjusted gray-scale signal corresponds to the first sub-pixel, and adjust the first to-be-adjusted gray-scale signal to the corresponding first transition gray-scale signal based on a second mapping relationship when the first to-be-adjusted gray-scale signal corresponds to the second sub-pixel.

8. The display panel according to claim 1, wherein the overdrive module comprises an overdrive map, the overdrive map comprising a value of each of the first transition gray-scale signals, a value of each of the start gray-scale signals, and a plurality of overdrive compensation values, each of the overdrive compensation values being set corresponding to a value of one of the first transition gray-scale signals and a value of a corresponding one of the start gray-scale signals;

the overdrive module generates a corresponding third gray-scale signal to be adjusted according to the first transition gray-scale signal and the corresponding overdrive compensation value based on the overdrive mapping table under the same value of the initial gray-scale signal;

The values of the plurality of first transition gray-scale signals in the mapping table are sequentially ordered according to the magnitude relation, and the values of the plurality of initial gray-scale signals in the mapping table are sequentially ordered according to the magnitude relation;

and under the condition that the same value of the initial gray-scale signal is smaller than the value of the initial gray-scale signal, and the absolute value of the difference value of the two corresponding driving compensation values is smaller than or equal to 3, the two values of the two adjacent first transition gray-scale signals are smaller than the value of the initial gray-scale signal.

9. The display panel according to claim 8, wherein the values of the initial gray-scale signals are less than 192 and the absolute value of the difference between the two corresponding overdrive compensation values is less than or equal to 3 when the values of the initial gray-scale signals are equal to or greater than 192;

wherein, two values of the two adjacent first transition gray scales are in a preset range, and two end point values of the preset range are 16 and 32 respectively.

10. A display device comprising the display panel according to any one of claims 1 to 9.