CN113436567B - Display panel, gamma adjusting method thereof and display device - Google Patents
Display panel, gamma adjusting method thereof and display device Download PDFInfo
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- CN113436567B CN113436567B CN202110712528.1A CN202110712528A CN113436567B CN 113436567 B CN113436567 B CN 113436567B CN 202110712528 A CN202110712528 A CN 202110712528A CN 113436567 B CN113436567 B CN 113436567B
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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
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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
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The disclosure relates to the technical field of display, and provides a display panel, a gamma adjusting method thereof and a display device. The display panel includes: the gamma circuit comprises a plurality of groups of gamma registers, each group of gamma registers stores a group of gamma data, and each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma grade; the processing circuit is used for acquiring the duty ratio of the pulse width modulation signal corresponding to any gamma level according to the plurality of groups of gamma data; in the pulse width modulation signal adjusting mode, the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval. The display panel has a good display effect in low gamma level display.
Description
Technical Field
The disclosure relates to the technical field of display, in particular to a display panel, a gamma adjusting method thereof and a display device.
Background
In the related art, a display panel includes a plurality of groups of gamma data, each group of gamma data includes a pulse width modulation signal duty ratio corresponding to a gamma level, and the display panel can obtain the pulse width modulation signal duty ratio corresponding to any gamma level according to the plurality of groups of gamma data by a linear interpolation method. However, the duty ratio of the pulse width modulation signal obtained by the above algorithm cannot be completely matched with the characteristics of the display panel, thereby causing color shift. Especially in most gray scale ranges of low gamma level, R register values obtained by the driving IC through the algorithm are smaller; meanwhile, in the 0 gray scale to the middle gray scale, the G register value acquired by the driving IC through the algorithm is larger. Therefore, the display panel will display green in the range from 0 gray scale to middle gray scale at low gamma level.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
According to an aspect of the present disclosure, there is provided a display panel including: the gamma circuit comprises a plurality of groups of gamma registers, each group of gamma registers stores a group of gamma data, and each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma grade; the processing circuit is used for acquiring the duty ratio of the pulse width modulation signal corresponding to any gamma level according to a plurality of groups of gamma data; in the pulse width modulation signal adjusting mode, the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval.
In an exemplary embodiment of the disclosure, each of the gamma levels corresponds to a display brightness value, and the display brightness value corresponding to the low gamma level interval is less than or equal to M1 nit, where M1 is greater than 0 and less than or equal to 16.
In an exemplary embodiment of the disclosure, each of the gamma levels corresponds to a display luminance value, and the display luminance value corresponding to the high gamma level interval is greater than M1 nit and less than or equal to M2 nit, M2 is greater than M1, and M2 is less than or equal to 150.
In an exemplary embodiment of the present disclosure, the duty ratios of pulse width modulated signals corresponding to each two adjacent gamma levels within a low gamma level interval are the same; the duty ratios of the pulse width modulation signals corresponding to each two adjacent gamma levels in the high gamma level interval are the same.
In an exemplary embodiment of the present disclosure, a difference between duty ratios of pulse width modulation signals corresponding to two adjacent gamma levels in a low gamma level interval is X1; the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2; wherein X1/X2 is less than or equal to 1/2, X1 is a positive number greater than or equal to zero, and X2 is a positive number greater than zero.
In one exemplary embodiment of the present disclosure, in the low gamma level interval, there is a difference between duty ratios of pulse width modulation signals corresponding to two sets of adjacent gamma levels.
In an exemplary embodiment of the disclosure, the processing circuit is configured to obtain, according to a plurality of groups of gamma data, a duty cycle of a pulse width modulation signal corresponding to any gamma level by using a linear interpolation method.
In one exemplary embodiment of the present disclosure, in the low gamma level interval, the duty ratio of the pulse width modulation signal corresponding to the highest gamma level may be Y1; in the high gamma level interval, the duty ratio of the pulse width modulation signal corresponding to the lowest gamma level can be Y2; wherein X1 is less than Y2-Y1 and X2 is less than Y2-Y1.
In an exemplary embodiment of the disclosure, the gamma circuit includes nine groups of gamma registers, a level corresponding to a Z-th group of gamma registers is higher than a level corresponding to a z+1th group of gamma registers, and Z is a positive integer greater than or equal to 1; the pulse width modulation signal duty ratio corresponding to the eighth group of gamma registers is Y1.
According to an aspect of the present disclosure, there is provided a gamma adjustment method of a display panel, the gamma adjustment method including:
acquiring a plurality of groups of gamma data, wherein each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma level;
acquiring a pulse width modulation signal duty ratio corresponding to any gamma level according to a plurality of groups of gamma data;
in the pulse width modulation signal adjusting mode, the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval.
In an exemplary embodiment of the disclosure, the display brightness value corresponding to the low gamma level interval is less than or equal to M1 nit, M1 is greater than 0 and less than or equal to 16; the display brightness value corresponding to the high gamma level interval is greater than M1 nit and less than or equal to M2 nit, M2 is greater than M1, and M2 is less than or equal to 150.
In an exemplary embodiment of the present disclosure, the duty ratios of pulse width modulated signals corresponding to each two adjacent gamma levels within a low gamma level interval are the same;
the duty ratio difference of the pulse width modulation signals corresponding to each two adjacent gamma levels in the high gamma level interval is the same;
the duty ratio difference of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is X1;
the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2;
wherein X1/X2 is less than or equal to 1/2.
In one exemplary embodiment of the present disclosure, in the low gamma level interval, there is a difference between duty ratios of pulse width modulation signals corresponding to two sets of adjacent gamma levels.
According to an aspect of the present disclosure, there is provided a display panel regulated using the above gamma adjustment method.
According to an aspect of the present disclosure, there is provided a display device including the above display panel.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 is a graph showing the contrast of the actual luminance and the target luminance of an R-cell at different gray scales;
FIG. 2 is a graph showing the contrast of the actual luminance and the target luminance of the G light-emitting unit at different gray scales;
FIG. 3 is a graph showing the relationship between the brightness value and the brightness of the light emitting unit in the related art;
FIG. 4 is a graph showing the relationship between color coordinates and display brightness values of a display panel;
FIG. 5 is a schematic diagram of an exemplary embodiment of a display panel of the present disclosure;
FIG. 6 is a graph showing the relationship between the brightness value and the brightness of the light emitting unit in the related art;
FIG. 7 is a graph showing the relationship between color coordinates and display brightness.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. Other relative terms such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.
The terms "a," "an," "the" are used to indicate the presence of one or more elements/components/divisions/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/compositional differences/etc., in addition to the listed elements/compositional differences/etc.
In the related art, the display panel may include a plurality of sets of gamma data, each set of gamma data including: display brightness values (Display Brightness Value, DBV) corresponding to the same gamma level, pulse width modulated signal duty cycle. Wherein, the lower the gamma level, the smaller the duty cycle of the pulse width modulation signal, and the smaller the display brightness value. The smaller the duty ratio of the pulse width modulation signal, the smaller the light emitting duration of the pixel driving circuit in one driving period, so that the display brightness value DBV of the display panel is positively correlated with the duty ratio of the pulse width modulation signal. The display panel can acquire the duty ratio of the pulse width modulation signal corresponding to any gamma level by a linear interpolation method according to a plurality of groups of gamma data. However, the duty ratio of the pulse width modulation signal obtained by the above algorithm cannot match the display characteristics of the display panel, resulting in color shift.
As shown in fig. 1, 2, 3 and 4, fig. 1 is a graph showing the actual light-emitting luminance and the target light-emitting luminance of the R light-emitting unit at different gray scales, fig. 2 is a graph showing the actual light-emitting luminance and the target light-emitting luminance of the G light-emitting unit at different gray scales, fig. 3 is a graph showing the relationship between the luminance value and the luminance value of the light-emitting unit in the related art, and fig. 4 is a graph showing the relationship between the color coordinates and the luminance value of the display panel. Fig. 1 may show a comparison diagram of actual light-emitting brightness and target light-emitting brightness of the R light-emitting unit under 32 nits at different gray scales, as shown in fig. 1, the abscissa indicates the gray scale, and the ordinate indicates the light-emitting brightness of the R light-emitting unit, wherein the light-emitting brightness of the light-emitting unit is determined by the driving current output by the pixel driving circuit, and the larger the driving current is, the larger the light-emitting brightness of the light-emitting unit is. In fig. 1, curve 1 represents the target light emission luminance of the R light emitting unit at different gray scales in the white balance state, curve 2 represents the luminance of the R light emitting unit realized by the driving IC through the above algorithm at different gray scales, and it can be seen from fig. 1 that in most gray scale ranges of the low gamma level, the R register value obtained by the driving IC through the above algorithm is small (the register value is positively correlated with the light emission luminance of the light emitting unit). Fig. 2 may show a comparison graph of actual light emission luminance and target light emission luminance of the G light emitting unit at different gray scales at 32 nits, as shown in fig. 2, the abscissa shows the gray scales, the ordinate shows the light emission luminance of the G light emitting unit, curve 4 shows the target light emission luminance of the G light emitting unit at different gray scales in a white balance state, curve 3 shows the luminance of the G light emitting unit realized by the driving IC through the above algorithm at different gray scales, and it can be seen from fig. 2 that the G register value obtained by the driving IC through the above algorithm is large in the 0 gray scale to the middle gray scale. Therefore, the display panel will display green in the range from 0 gray scale to middle gray scale at low gamma level. As shown in fig. 3, the abscissa represents the display luminance value DBV, and the ordinate represents the overall light emission luminance L of the light emitting units in the pixel unit. A1 represents a low gamma level region, and A2 represents a high gamma level region. The solid line represents the variation curve of the pixel unit light emission luminance L and the display luminance value DBV obtained by the driving IC through the above algorithm, and the broken line represents the variation curve of the pixel unit light emission luminance L and the display luminance value DBV when the low gamma level region A1 achieves a good display effect (white balance). As shown in fig. 3, in the low-gamma-level region A1, the G light-emitting unit has a higher luminance, and the G light-emitting unit has a higher contribution weight to the overall luminance of the pixel unit, so that the overall light-emitting luminance of the pixel unit is higher. As shown in fig. 4, the abscissa represents the display luminance value DBV, and the ordinate represents the color coordinate value, wherein the curve x represents the value of the color coordinate x at different display luminance values, and the curve y represents the value of the color coordinate y at different display luminance values. A1 represents a low gamma level region, and A2 represents a high gamma level region. As can be seen from fig. 4, in the low gamma level region A1, y in the color coordinates is high, and x in the color coordinates is low, that is, the display panel is abnormal in the low gamma level region A1.
Based on this, the present exemplary embodiment provides a display panel, as shown in fig. 5, which is a schematic structural diagram of an exemplary embodiment of the display panel of the present disclosure. The display panel may include: the gamma circuit 01 and the processing circuit 02, the gamma circuit 01 can comprise a plurality of groups of gamma registers, each group of gamma registers stores a group of gamma data, and each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma level; the processing circuit 02 may be configured to obtain a duty ratio of a pulse width modulation signal corresponding to any gamma level according to a plurality of groups of gamma data; in the pulse width modulation signal adjusting mode, the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval. The pulse width modulation signal regulation mode is a brightness regulation mode when the pulse width modulation signal is less than 100%.
The display panel provided by the present exemplary embodiment reduces the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval, that is, reduces the influence weight of the duty ratio of the pulse width modulation signals on the display brightness value DBV in the low gamma level interval, thereby improving the above-mentioned color shift problem.
It should be noted that, the display brightness value DBV of the display panel is also positively correlated with the data driving voltage Vdata, and Vdata may be generated by the gamma voltage group adjustment. The gamma data may further include gamma voltage groups corresponding to gamma levels, each gamma voltage group may include a plurality of gamma voltages, the gamma voltages may correspond to Vdata under a certain gray level, and the display panel may obtain the gamma voltages corresponding to any gray level according to the plurality of gamma voltages by using a linear difference method, for example, under a certain gamma level, the gamma voltage corresponding to the q1 gray level is p1, the gamma voltage corresponding to the q2 gray level is p2, and then the gamma voltage corresponding to the X gray level is (X-q 1) ×p2-p 1)/(q 2-q 1) +p1. In addition, the display panel may obtain the gamma voltage group under any gamma level according to the plurality of gamma voltage groups by using a linear difference method, for example, under a certain gray level, the gamma voltage corresponding to the q3 th gamma level is p3, the gamma voltage corresponding to the q4 th gamma level is p4, and the gamma voltage corresponding to the X-th gamma level is (X-q 3)/(p 4-p 3)/(q 4-q 3) +p3. Although the gamma voltage groups under each gamma level are also obtained by a linear difference method, the difference accuracy of the gamma voltage groups is higher, so that the gamma voltage obtained by the difference method is more matched with the display characteristics of the display panel than the pulse width modulation signal duty ratio obtained by the difference method. Therefore, the influence weight of the duty ratio of the pulse width modulation signal on the display brightness value DBV is reduced, and the influence weight of the gamma voltage on the display brightness value DBV is improved, so that the DBV is more matched with the display characteristics of the display panel.
In this exemplary embodiment, the processing circuit may be configured to obtain, by using a linear interpolation method, a duty ratio of a pulse width modulation signal corresponding to any gamma level according to a plurality of sets of gamma data. For example, the duty cycle of the pwm signal is b1 at the a 1-th gamma level and b2 at the a 2-th gamma level, and the duty cycle of the pwm signal is (X-a 1)/(a 2-a 1) +b1 at the X-th gamma level.
In the present exemplary embodiment, the display luminance value corresponding to the low gamma level interval may be equal to or less than M1 nit, M1 may be greater than 0 and equal to or less than 16, for example, M1 may be equal to 1, 2, 3, 5, 8, 12, 16, etc.; the display brightness value corresponding to the high gamma level interval may be greater than M1 nit and less than or equal to M2 nit, M2 is greater than M1, and M2 is less than or equal to 150, for example, M2 may be equal to 150, 140, 130, 100, 80, etc.
In the present exemplary embodiment, the difference between the duty ratios of the pulse width modulation signals corresponding to the respective adjacent two gamma levels in the low gamma level interval may be the same; the duty cycle differences of the pulse width modulated signals corresponding to each two adjacent gamma levels within the high gamma level interval may be the same. The duty ratio difference between the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval can be X1; the duty ratio difference between the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval can be X2; wherein X1/X2 may be 1/2 or less, X1 is a positive number of zero or more, and X2 is a positive number of zero or more. For example, X1/X2 may be equal to 0, 1/3, 1/4, 1/5, etc. It should be appreciated that in other exemplary embodiments, there may also be a difference between the duty cycles of the pulse width modulated signals corresponding to two adjacent gamma levels in the low gamma level interval, for example, in the low gamma level interval, there may be a difference k1 between the duty cycles of the pulse width modulated signals corresponding to one adjacent gamma level, and a difference k2 between the duty cycles of the pulse width modulated signals corresponding to the other adjacent gamma level, where k1 is not equal to k2.
In the present exemplary embodiment, the difference between the duty ratios of the pulse width modulated signals between the adjacent gamma levels in the low gamma level interval may be reduced by reducing the duty ratio of the pulse width modulated signals in a certain gamma register. For example, the display panel may include nine sets of gamma registers: the first and second sets … … and ninth sets of gamma registers. The gamma level corresponding to the Z-th group of gamma registers is higher than the gamma level corresponding to the Z+1-th group of gamma registers, and Z is a positive integer greater than or equal to 1, for example, the gamma level corresponding to the first group of gamma registers is higher than the gamma level corresponding to the second group of gamma registers. Wherein the gamma levels between the eighth and ninth groups of gamma registers may form a low gamma level interval and the gamma levels between the fourth to seventh groups of gamma registers may form a high gamma level interval. Since the number of gamma levels between the eighth group of gamma registers and the ninth group of gamma registers is unchanged, the present exemplary embodiment can reduce the pulse width modulation signal duty ratio in the eighth group of gamma registers, thereby reducing the pulse width modulation signal duty ratio difference between adjacent two gamma levels between the eighth group of gamma registers and the ninth group of gamma registers. It should be appreciated that in other exemplary embodiments, the gamma circuit may include other numbers of gamma register sets, and that there may be other divisions between the low gamma level intervals and the high gamma level intervals. The processing circuit may also adjust the duty cycle of the pulse width modulated signals in the other gamma register sets, e.g., the processing circuit may also increase the duty cycle of the pulse width modulated signals in the ninth set of gamma registers. In addition, the processing circuit may also adjust the duty ratio of the pulse width modulation signals in the plurality of gamma register groups at the same time, for example, the processing circuit may reduce the duty ratio of the pulse width modulation signals in the eighth group of gamma registers and the ninth group of gamma registers at the same time.
In the present exemplary embodiment, in the high gamma level interval, the duty ratio of the pulse width modulated signal corresponding to the lowest level gamma level may be Y2. In the low gamma level interval, the highest gamma level is the gamma level corresponding to the eighth group of gamma registers, and the duty ratio of the pulse width modulation signal in the eighth group of gamma registers can be Y1 after being reduced. Since the present exemplary embodiment reduces the duty ratio of the pulse width modulation signal in the eighth group of gamma registers, X1 is smaller than Y2-Y1, and X2 is smaller than Y2-Y1.
As shown in fig. 6 and 7, fig. 6 is a graph showing the relationship between the luminance value and the luminance of the light emitting unit in the related art, and fig. 7 is a graph showing the relationship between the color coordinates of the display panel and the luminance value. In fig. 6, the abscissa indicates the display luminance value DBV, and the ordinate indicates the overall light emission luminance L of the light emitting unit in the pixel unit. As shown in fig. 6, the display panel has a relatively uniform linear relationship between the brightness L of the light emitting unit and the display brightness value DBV at different display brightness values DBV (i.e., different gamma levels), i.e., the display panel does not have color shift at low gamma levels. In fig. 7, the abscissa represents the display brightness value DBV, and the ordinate represents the color coordinate value, and as can be seen from fig. 7, x in the color coordinate is substantially the same at different display brightness values DBV, and y in the color coordinate is substantially the same at different display brightness values DBV, that is, the display panel does not undergo color shift at a low gamma level.
The present exemplary embodiment also provides a display panel gamma adjustment method, which may include:
acquiring a plurality of groups of gamma data, wherein each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma level;
acquiring a pulse width modulation signal duty ratio corresponding to any gamma level according to a plurality of groups of gamma data;
in the pulse width modulation signal adjusting mode, the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference between the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval.
In the present exemplary embodiment, the display luminance value corresponding to the low gamma level interval may be equal to or less than M1 nit, M1 may be greater than 0 and equal to or less than 16, for example, M1 may be equal to 1, 2, 3, 5, 8, 12, 16, etc.; the display brightness value corresponding to the high gamma level interval may be greater than M1 nit and less than or equal to M2 nit, M2 is greater than M1, and M2 is less than or equal to 150, for example, M2 may be equal to 150, 140, 130, 100, 80, etc.
In the present exemplary embodiment, the difference between the duty ratios of the pulse width modulation signals corresponding to each two adjacent gamma levels in the low gamma level interval is the same; the duty ratio difference of the pulse width modulation signals corresponding to each two adjacent gamma levels in the high gamma level interval is the same; the duty ratio difference of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is X1; the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2; wherein X1/X2 is less than or equal to 1/2.
In the present exemplary embodiment, in the low gamma level interval, there are differences between duty ratios of pulse width modulated signals corresponding to two sets of adjacent gamma levels.
The gamma adjustment method of the display panel has the same technical features and working principles as those of the display panel, and the above description has been made in detail, and will not be repeated here.
The present exemplary embodiment also provides a display panel that can be adjusted using the above-described gamma adjustment method.
The present exemplary embodiment also provides a display device including the above display panel. The display device can be a display device such as a mobile phone, a tablet personal computer, a television and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (12)
1. A display panel, comprising:
the gamma circuit comprises a plurality of groups of gamma registers, wherein each group of gamma registers stores a group of gamma data, and each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma grade;
the processing circuit is used for acquiring the duty ratio of the pulse width modulation signal corresponding to any gamma level according to a plurality of groups of gamma data;
in the pulse width modulation signal regulation mode, the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval;
each gamma level corresponds to a display brightness value, the display brightness value corresponding to the low gamma level interval is less than or equal to M1 nit, and M1 is more than 0 and less than or equal to 16;
each gamma level corresponds to a display brightness value, the display brightness value corresponding to the high gamma level interval is more than M1 nit and less than or equal to M2 nit, M2 is more than M1, and M2 is less than or equal to 150.
2. The display panel according to claim 1, wherein the difference between duty cycles of the pulse width modulation signals corresponding to each two adjacent gamma levels in the low gamma level interval is the same;
the duty ratios of the pulse width modulation signals corresponding to each two adjacent gamma levels in the high gamma level interval are the same.
3. The display panel according to claim 2, wherein a difference between duty ratios of pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is X1;
the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2;
wherein X1/X2 is less than or equal to 1/2, X1 is a positive number greater than or equal to zero, and X2 is a positive number greater than zero.
4. The display panel of claim 1, wherein in the low gamma level interval, there are differences between duty cycles of pulse width modulated signals corresponding to two adjacent gamma levels.
5. The display panel of claim 1, wherein the processing circuit is configured to obtain the duty cycle of the pulse width modulated signal corresponding to any one gamma level based on the plurality of sets of gamma data using a linear interpolation method.
6. The display panel according to claim 1, wherein a difference between duty ratios of pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is X1;
the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2;
in the low gamma level interval, the duty ratio of the pulse width modulation signal corresponding to the highest gamma level is Y1;
in the high gamma level interval, the duty ratio of the pulse width modulation signal corresponding to the lowest gamma level is Y2;
wherein X1 is less than Y2-Y1 and X2 is less than Y2-Y1.
7. The display panel according to claim 6, wherein the gamma circuit comprises nine groups of gamma registers, a level corresponding to a Z-th group of gamma registers is higher than a level corresponding to a z+1th group of gamma registers, and Z is a positive integer of 1 or more;
the pulse width modulation signal duty ratio corresponding to the eighth group of gamma registers is Y1.
8. A display panel gamma adjustment method, comprising:
acquiring a plurality of groups of gamma data, wherein each group of gamma data comprises a pulse width modulation signal duty ratio corresponding to a gamma level;
acquiring a pulse width modulation signal duty ratio corresponding to any gamma level according to a plurality of groups of gamma data;
in the pulse width modulation signal regulation mode, the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is smaller than the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval;
the display brightness value corresponding to the low gamma level interval is less than or equal to M1 nit, and M1 is more than 0 and less than or equal to 16;
the display brightness value corresponding to the high gamma level interval is greater than M1 nit and less than or equal to M2 nit, M2 is greater than M1, and M2 is less than or equal to 150.
9. The method of claim 8, wherein the gamma adjustment of the display panel,
the duty ratio difference of the pulse width modulation signals corresponding to each two adjacent gamma levels in the low gamma level interval is the same;
the duty ratio difference of the pulse width modulation signals corresponding to each two adjacent gamma levels in the high gamma level interval is the same;
the duty ratio difference of the pulse width modulation signals corresponding to two adjacent gamma levels in the low gamma level interval is X1;
the difference of the duty ratios of the pulse width modulation signals corresponding to two adjacent gamma levels in the high gamma level interval is X2;
wherein X1/X2 is less than or equal to 1/2.
10. The method of claim 8, wherein the gamma adjustment of the display panel,
in the low gamma level interval, the difference between the duty ratios of the pulse width modulation signals corresponding to two groups of adjacent gamma levels is unequal.
11. A display panel, characterized in that it is regulated by the gamma regulation method according to any one of claims 8-10.
12. A display device comprising the display panel of any one of claims 1-7, 11.
Priority Applications (1)
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| CN202110712528.1A CN113436567B (en) | 2021-06-25 | 2021-06-25 | Display panel, gamma adjusting method thereof and display device |
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| CN114694588A (en) * | 2022-04-28 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Brightness adjusting method and device, display device and storage medium |
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