CN117524155A - Power supply voltage adjusting method and device of display equipment and display equipment - Google Patents
Power supply voltage adjusting method and device of display equipment and display equipment Download PDFInfo
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- CN117524155A CN117524155A CN202311406696.3A CN202311406696A CN117524155A CN 117524155 A CN117524155 A CN 117524155A CN 202311406696 A CN202311406696 A CN 202311406696A CN 117524155 A CN117524155 A CN 117524155A
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- 238000013507 mapping Methods 0.000 claims abstract description 119
- 230000007306 turnover Effects 0.000 claims abstract description 24
- 238000004364 calculation method Methods 0.000 claims abstract description 16
- 241001270131 Agaricus moelleri Species 0.000 claims description 30
- 238000010586 diagram Methods 0.000 description 5
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Theoretical Computer Science (AREA)
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Abstract
The application discloses a power supply voltage adjusting method and device of display equipment and the display equipment. The power supply voltage adjusting method of the display device includes: acquiring a mapping relation between gray scale and data voltage of a display panel; based on the mapping relation between gray scale and data voltage, obtaining the data voltage corresponding to the display gray scale of each sub-pixel in the current frame; acquiring the total signal turnover number of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line; and if the total number of signal inversions is larger than a preset threshold value, adjusting the power supply voltage of the display panel. According to the method and the device, the situation of the total signal turnover number of the picture can be judged more accurately by detecting the data voltage turnover to serve as the calculation basis of the total signal turnover number, so that the effective time of power supply voltage adjustment is defined more accurately, and the power supply voltage adjustment is more reliable.
Description
Technical Field
The application relates to the technical field of display, in particular to a power supply voltage adjusting method and device of display equipment and the display equipment.
Background
Along with the great promotion of environmental protection and energy saving, the green energy saving has become the trend of current technological development. In the field of LCD (Liquid Crystal Display ), the power supply voltage (AVDD voltage) of the display device is dynamically adjusted by an Adaptive-AVDD algorithm (called A-AVDD algorithm for short), so that the energy consumption of the display device can be effectively reduced.
The A-AVDD algorithm can determine whether to start the power supply voltage adjustment by detecting the signal inversion condition on all the data lines of the current frame. The signal inversion condition is generally characterized by gray scale inversion of adjacent sub-pixels. However, because the nature of signal inversion is voltage inversion, gray scale inversion is adopted as the calculation basis of the signal inversion condition, and the light and heavy load condition of the current frame cannot be intuitively reflected, so that the starting time of the A-AVDD algorithm is possibly improper, and the energy consumption of the display panel is increased.
Disclosure of Invention
The embodiment of the application provides a power supply voltage adjusting method and device of display equipment and the display equipment, so as to optimize the starting time of an A-AVDD algorithm.
In order to solve the technical problems, the embodiment of the application discloses the following technical scheme:
in a first aspect, there is provided a power supply voltage adjustment method of a display device including a display panel including a plurality of data lines, each of the data lines connecting a plurality of sub-pixels, the method comprising:
obtaining a mapping relation between gray scales of the display panel and data voltages, wherein the data voltages are voltages which are input into the data lines and drive the sub-pixels to display brightness corresponding to the gray scales;
based on the mapping relation between the gray scale and the data voltage, acquiring the data voltage corresponding to the display gray scale of each sub-pixel in the current frame;
acquiring the total signal turnover number of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line;
and if the total signal turnover number is larger than a preset threshold value, adjusting the power supply voltage of the display panel.
With reference to the first aspect, the display device further includes a mapping relation register configured to store the mapping relation in advance;
the method for obtaining the mapping relation between the gray scale and the data voltage of the display panel comprises the following steps:
detecting whether the mapping relation between the gray scale of the display panel and the data voltage exists in the mapping relation register;
and if the mapping relation exists in the mapping relation register, acquiring the mapping relation from the mapping relation register.
With reference to the first aspect, the display device further includes a power management integrated circuit, where the power management integrated circuit is connected to the display panel; the method further comprises the steps of:
if the mapping relation does not exist in the mapping relation register, gamma voltages corresponding to gray scales of all binding points are read from the power management integrated circuit;
based on the gamma voltages corresponding to the gray scales of all binding points, acquiring gray scale voltages corresponding to all gray scales by adopting a linear interpolation mode;
determining the gray scale voltage corresponding to the full gray scale as the mapping relation between the gray scale of the display panel and the data voltage;
and storing the mapping relation in the mapping relation register.
With reference to the first aspect, obtaining the total number of signal inversions of the current frame based on the data voltages corresponding to the sub-pixels connected to each of the data lines includes:
based on each data line, acquiring a voltage difference value of data voltages corresponding to any two adjacent sub-pixels on the data line;
and determining the sum of absolute values of all voltage difference values on all data lines as the total signal turnover number of the current frame.
With reference to the first aspect, determining the sum of absolute values of respective voltage differences on all data lines as the total number of signal inversions of the current frame includes:
determining the total number of signal inversions of the current frame by the following formula:
wherein Toggle is the total number of signal inversions of the current frame, line_1 is the 1 st data line, line_w is the w data line, w is the number of data lines, and w is a positive integer; i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels connected on each data line, and h is a positive integer; v (g) i ) For the data voltage corresponding to the ith sub-pixel, V (g i-1 ) The data voltage corresponding to the i-1 th sub-pixel.
With reference to the first aspect, adjusting the power supply voltage of the display panel includes:
acquiring an initial power supply voltage of the display panel;
acquiring the power supply voltage corresponding to the current frame based on the initial power supply voltage, the preset target power supply voltage and the position of the current frame in the time length of the vertical time sequence blank area of each frame;
and adjusting the power supply voltage of the display panel to be the power supply voltage corresponding to the current frame.
In a second aspect, there is provided a power supply voltage adjusting apparatus of a display device including a display panel including a plurality of data lines, each of the data lines connecting a plurality of sub-pixels, the apparatus comprising:
the mapping relation acquisition module is used for acquiring the mapping relation between the gray scale of the display panel and the data voltage, wherein the data voltage is a voltage which is input into the data line and drives the sub-pixels to display the brightness corresponding to the gray scale;
the data voltage mapping module is used for acquiring data voltages corresponding to the display gray scales of the sub-pixels in the current frame based on the mapping relation between the gray scales and the data voltages;
the signal turnover calculation module is used for acquiring the total number of signal turnover of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line;
and the power supply voltage adjusting module is used for adjusting the power supply voltage of the display panel if the total signal turnover number is larger than a preset threshold value.
With reference to the second aspect, the display device further includes a mapping relation register configured to store the mapping relation in advance;
the mapping relation acquisition module is used for:
detecting whether the mapping relation between the gray scale of the display panel and the data voltage exists in the mapping relation register;
and if the mapping relation exists in the mapping relation register, acquiring the mapping relation from the mapping relation register.
With reference to the second aspect, the display device further includes a power management integrated circuit, and the power management integrated circuit is connected with the display panel; the mapping relation acquisition module is further used for:
if the mapping relation does not exist in the mapping relation register, gamma voltages corresponding to gray scales of all binding points are read from the power management integrated circuit;
based on the gamma voltages corresponding to the gray scales of all binding points, acquiring gray scale voltages corresponding to all gray scales by adopting a linear interpolation mode;
determining the gray scale voltage corresponding to the full gray scale as the mapping relation between the gray scale of the display panel and the data voltage;
and storing the mapping relation in the mapping relation register.
In a third aspect, there is provided a display device employing the power supply voltage adjustment method of the display device according to any one of the first aspects, or the power supply voltage adjustment apparatus of the display device according to any one of the second aspects.
One of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the power supply voltage adjusting method of the display device comprises the following steps: acquiring a mapping relation between gray scale and data voltage of a display panel; based on the mapping relation between gray scale and data voltage, obtaining the data voltage corresponding to the display gray scale of each sub-pixel in the current frame; acquiring the total signal turnover number of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line; and if the total number of signal inversions is larger than a preset threshold value, adjusting the power supply voltage of the display panel. According to the power supply voltage adjustment method, the data voltage overturn is detected to serve as the calculation basis of the total number of signal overturn, so that the condition of the total number of signal overturn of a picture can be judged more accurately, the effective time of power supply voltage adjustment is defined more accurately, and the power supply voltage adjustment is more reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating an example gray scale of each sub-pixel connected to any two data lines in a display device;
FIG. 2 is a diagram illustrating a conventional A-AVDD algorithm for detecting signal inversion of a frame;
fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 4 is an overall flow chart of a power supply voltage adjustment method of a display device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a power supply voltage adjusting device of a display device according to an embodiment of the present application.
Reference numerals:
10-a display panel; 11-data lines; 12-subpixels; 20-a power management integrated circuit; 30-a timing controller; 31-a target IP module; 40-mapping relation register; 501-a mapping relation acquisition module; 502-a data voltage mapping module; 503-a signal inversion calculation module; 504-supply voltage regulation module.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, the A-AVDD algorithm represents the supply voltage adjustment algorithm.
Referring to fig. 1 and fig. 2 together, fig. 1 illustrates an example of gray scales of each sub-pixel connected to any two data lines in a display device, and fig. 2 illustrates an example of signal inversion of a conventional A-AVDD algorithm detection frame. The conventional A-AVDD algorithm adopts gray scale inversion of adjacent sub-pixels to represent signal inversion condition of a picture. Taking two data lines shown in fig. 1 as data line1 and data line2 respectively, 5 sub-pixels are connected to each data line, the gray scale of each sub-pixel on the data line1 is 170 and 0 at intervals, the gray scale of each sub-pixel on the data line2 is 220 and 50 at intervals as an example, the number of signal turns on the data line1 is 680, and the number of signal turns on the data line2 is 680, and at the moment, the A-AVDD algorithm considers that the two signal turns are the same; however, in practice, the actual data voltage inversion of 0-170 on data line1 is smaller than the actual data voltage inversion of 50-220 on data line2, so that the data voltage variation is not equivalent to the gray scale value variation, the gray scale value variation is used as the calculation basis of the signal inversion condition, and the light and heavy load condition of the current frame cannot be intuitively reflected, so that the A-AVDD algorithm is possibly caused to have improper starting time, and the energy consumption of the display panel is increased.
In order to solve the problems in the conventional A-AVDD algorithm, the embodiment of the application provides a power supply voltage adjustment method for display equipment, which can more accurately judge the situation of the total signal turning number of a picture by detecting the turning of data voltage as the calculation basis of the total signal turning number, and further more accurately define the effective time of the power supply voltage adjustment, thereby solving at least part of the technical problems.
Referring to fig. 3, fig. 3 illustrates a structure of a display device according to an embodiment of the present application. The display device provided in the embodiment of the application includes a display panel 10, where the display panel 10 includes a plurality of data lines 11, and each data line 11 is connected to a plurality of sub-pixels 12. The display device further includes a Power Management Integrated Circuit (PMIC) 20 and a Timing Controller (TCON) 30, both of which are connected to the display panel 10, and the timing controller 30 is also connected to the Power Management integrated circuit 20. The timing controller 30 is provided with a plurality of functional IP (Intellectual Property, a generic term of integrated circuit core with intellectual property core) modules, and a functional IP module corresponding to an A-AVDD algorithm in the plurality of functional IP modules is a target IP module 31, and the power supply voltage adjustment method of the display device provided in the embodiment of the present application is applied to the timing controller 30.
In some embodiments, the display device further includes a mapping register 40, the mapping register 40 being configured to pre-store the mapping.
Referring to fig. 4, fig. 4 illustrates an overall flow of a power supply voltage adjustment method of a display device according to an embodiment of the present application. The power supply voltage adjusting method of the display device comprises the following steps:
401: the mapping relation between the gray scale and the data voltage of the display panel 10 is obtained.
Specifically, the data voltage is a voltage inputted to the data line 11 and driving the sub-pixel 12 to display the luminance corresponding to the gray scale. The mapping relation between the gray level and the data voltage is a Look-Up Table (LUT) of the gray level voltage, and the data voltage corresponding to the gray level can be found from the LUT. The lookup table may be stored in the mapping register 40.
In some embodiments, step 401 may be performed by:
step one, it is detected whether the mapping relation between the gray scale of the display panel 10 and the data voltage exists in the mapping relation register 40.
Step two, if there is a mapping relationship in the mapping relationship register 40, the mapping relationship is obtained from the mapping relationship register 40.
Therefore, the gray scale can be conveniently converted into the data voltage through the mode, the total number of the subsequent signal turnover is calculated, and the processing efficiency is improved.
Furthermore, in some embodiments, after performing step one, step 401 may further include the steps of:
step three, if there is no mapping relation in the mapping relation register 40, the gamma voltages corresponding to the gray scales of each binding point are read from the power management integrated circuit 20.
Specifically, when adjusting the gamma characteristic curve of the display panel 10, the gamma characteristic curve is usually debugged by using gray scales of binding points, and the gamma voltage corresponding to each gray scale of the binding point is stored in the power management integrated circuit 20. The timing controller 30 can read the gamma voltages corresponding to the gray scales of the binding points from the power management integrated circuit 20.
And step four, acquiring gray-scale voltages corresponding to all gray scales by adopting a linear interpolation mode based on gamma voltages corresponding to gray scales of all binding points.
Specifically, the full gray scale refers to each gray scale within the whole gray scale range, for example, each gray scale from 0 gray scale to 255 gray scales.
Step five, determining the gray scale voltage corresponding to the full gray scale as the mapping relation between the gray scale of the display panel 10 and the data voltage.
Step six, the mapping relation is stored in the mapping relation register 40.
In this way, when there is no mapping relation in the mapping relation register 40, the mapping relation register 40 is initialized based on the binding point gray scale and the corresponding gamma voltage, so as to obtain the gray scale voltage corresponding to the full gray scale, and the gray scale voltage is used as the mapping relation between the gray scale and the data voltage, which is convenient, and ensures that the mapping relation is consistent with the display panel 10, thereby improving the accuracy of subsequent calculation.
402: based on the mapping relation between the gray scale and the data voltage, the data voltage corresponding to the display gray scale of each sub-pixel 12 in the current frame is obtained.
Specifically, based on the display gray levels of the respective sub-pixels 12, the data voltages corresponding to the respective display gray levels are found from the mapping relationship.
403: the total number of signal inversions of the current frame is obtained based on the data voltages corresponding to the respective sub-pixels 12 connected on each data line 11.
In some embodiments, the total number of signal inversions for the current frame may be obtained by:
step one, based on each data line 11, a voltage difference of data voltages corresponding to any two adjacent sub-pixels 12 on the data line 11 is obtained.
And step two, determining the sum of absolute values of all voltage difference values on all the data lines 11 as the total signal inversion number of the current frame.
In some examples, the total number of signal inversions for the current frame may be determined by the following equation (1):
in the formula (1), toggle is the total number of signal inversions of the current frame, and the larger the Toggle is, the larger the load of the data line 11 is, and the higher the power consumption is. line_1 is the 1 st data line 11, line_w is the w th data line 11, w is the number of data lines 11, w is a positive integer, i is an integer greater than or equal to 2 and less than or equal to h, h is the number of subpixels 12 connected to each data line 11, h is a positive integer, V (g) i ) For the data voltage corresponding to the ith sub-pixel 12, V (g i-1 ) The data voltage corresponding to the i-1 th subpixel 12.
404: if the total number of signal inversions is larger than the preset threshold, the power supply voltage of the display panel 10 is adjusted.
In some embodiments, if the total number of signal inversions is greater than the preset threshold, the timing controller 30 determines that the current frame is a reload frame and the power voltage AVDD needs to be adjusted. Specifically, the power supply voltage of the display panel 10 can be adjusted by:
step one, an initial power supply voltage of the display panel 10 is obtained.
Specifically, the timing controller 30 reads the initial power supply voltage of the display panel 10 from the power management integrated circuit 20 and writes the initial power supply voltage to the target IP block 31.
And step two, acquiring the power supply voltage corresponding to the current frame based on the initial power supply voltage, the preset target power supply voltage and the position of the current frame in the time length of the vertical time sequence blank area of each frame.
Specifically, the length of the vertical timing blank region per frame is V-Blanking per frame, for example, for a resolution of 1920 (horizontal h direction) ×1080 (vertical V direction), but in reality the V direction may be 1150 lines of data together, that is, 1150-1080=70 lines.
After the timing controller 30 writes the initial power supply voltage into the target IP block 31, the target IP block 31 may acquire the power supply voltage corresponding to the current frame based on the initial power supply voltage, the preset target power supply voltage, and the position of the current frame within the duration of the vertical timing blank region of each frame. Specifically, an inter-frame interpolation manner in the related art may be used to perform calculation, for example, according to a difference value between an initial power supply voltage and a target power supply voltage and a frame number between an initial frame and a target frame, a voltage interval value of each frame is obtained, and then the voltage interval value is multiplied by a frame difference between a current frame and the initial frame, and then the initial power supply voltage is added, so that the power supply voltage corresponding to the current frame can be obtained, which is not described in detail.
Step three, the power supply voltage of the display panel 10 is adjusted to the power supply voltage corresponding to the current frame.
Specifically, the timing controller 30 writes the power supply voltage corresponding to the current frame calculated by the target IP block 31 into the power management integrated circuit 20, so that the power management integrated circuit 20 provides the power supply voltage corresponding to the current frame to the display panel 10.
In addition, in some embodiments, the power supply voltage adjustment method of the display device may further include the following steps in parallel with step 401:
step one, the gray scale of each sub-pixel 12 in the current frame of the display panel 10 is obtained.
Step two, the duty ratio of the high gray scale is obtained based on the gray scale of each sub-pixel 12.
Specifically, the quotient of the number of high gray levels among the gray levels of each sub-pixel 12 and the total number of sub-pixels 12 is determined as the duty ratio of the high gray levels.
Step three, if the duty ratio of the high gray level exceeds the preset gray level threshold, the power supply voltage of the display panel 10 is adjusted.
It can be understood that the power supply voltage adjustment method provided by the application can more accurately judge the situation of the total signal turnover number of the picture by detecting the data voltage turnover as the calculation basis of the total signal turnover number, thereby more accurately defining the effective time of the power supply voltage adjustment and ensuring that the power supply voltage adjustment is more reliable.
Accordingly, referring to fig. 5, fig. 5 illustrates a block diagram of a power supply voltage adjusting apparatus of a display device according to an embodiment of the present application. The display device provided in the embodiment of the application includes a display panel 10, the display panel 10 includes a plurality of data lines 11, each data line 11 is connected to a plurality of sub-pixels 12, and the power supply voltage adjusting apparatus includes: a mapping relation acquisition module 501, a data voltage mapping module 502, a signal inversion calculation module 503 and a power supply voltage adjustment module 504.
The mapping relationship obtaining module 501 is configured to obtain a mapping relationship between a gray level of the display panel 10 and a data voltage, where the data voltage is a voltage input to the data line 11 and driving the sub-pixel 12 to display a brightness corresponding to the gray level.
The data voltage mapping module 502 is configured to obtain a data voltage corresponding to a display gray level of each sub-pixel in the current frame based on a mapping relationship between the gray level and the data voltage.
The signal inversion calculation module 503 is configured to obtain the total number of signal inversions of the current frame based on the data voltages corresponding to the sub-pixels 12 connected to each data line 11.
The power supply voltage adjustment module 504 is configured to adjust the power supply voltage of the display panel 10 if the total number of signal inversions is greater than a preset threshold.
In some embodiments, the display device further includes a mapping register 40, the mapping register 40 being configured to pre-store the mapping.
The mapping relationship obtaining module 501 is configured to:
whether the mapping relation between the gray scale of the display panel 10 and the data voltage exists in the mapping relation register 40 is detected.
If there is a mapping in the mapping register 40, the mapping is obtained from the mapping register 40.
In some embodiments, the display device further includes a power management integrated circuit 20, the power management integrated circuit 20 being connected to the display panel 10. The mapping relationship obtaining module 501 is further configured to:
if the mapping relation does not exist in the mapping relation register 40, the gamma voltages corresponding to the gray scales of the binding points are read from the power management integrated circuit 20.
Based on the gamma voltages corresponding to the gray scales of all binding points, the gray scale voltages corresponding to the full gray scales are obtained by adopting a linear interpolation mode.
The gray scale voltage corresponding to the full gray scale is determined as the mapping relation between the gray scale of the display panel 10 and the data voltage.
The mapping relation is stored in the mapping relation register 40.
In some embodiments, the signal inversion calculation module 503 is specifically configured to:
based on each data line 11, a voltage difference of data voltages corresponding to any two adjacent sub-pixels 12 on the data line 11 is obtained.
The sum of the absolute values of the respective voltage differences on all the data lines 11 is determined as the total number of signal inversions of the current frame.
In some embodiments, the signal inversion calculation module 503 is specifically configured to:
the total number of signal inversions for the current frame is determined by the following formula:
wherein Toggle is the total number of signal inversions of the current frame, line_1 is the 1 st data line 11, line_w is the w data line 11, w is the number of data lines 11, w is a positive integer, i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels 12 connected to each data line 11, h is a positive integer, V (g) i ) For the data voltage corresponding to the ith sub-pixel 12, V (g i-1 ) The data voltage corresponding to the i-1 th subpixel 12.
In some embodiments, the supply voltage adjustment module 504 is specifically configured to:
an initial power supply voltage of the display panel 10 is acquired.
And acquiring the power supply voltage corresponding to the current frame based on the initial power supply voltage, the preset target power supply voltage and the position of the current frame in the time length of the vertical time sequence blank area of each frame.
The power supply voltage of the display panel 10 is adjusted to the power supply voltage corresponding to the current frame.
It can be understood that the power supply voltage adjusting device provided by the application can more accurately judge the situation of the total signal turnover number of the picture by detecting the data voltage turnover as the calculation basis of the total signal turnover number, thereby more accurately defining the effective time of the power supply voltage adjustment and ensuring that the power supply voltage adjustment is more reliable.
Accordingly, the embodiment of the application also provides a display device, and the display device adopts the power supply voltage adjusting method of the display device in the previous embodiment or the power supply voltage adjusting device of the display device in the previous embodiment. The display device may be a terminal, which may specifically include, but is not limited to, a tiled screen, a smart television, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
The foregoing describes in detail a method, an apparatus, and a display device for adjusting a power supply voltage of a display device provided in embodiments of the present application, and specific examples are applied to illustrate principles and implementations of the present application, where the descriptions of the foregoing embodiments are only used to help understand technical solutions and core ideas of the present application; 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 corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A power supply voltage adjustment method of a display device, the display device comprising a display panel, the display panel comprising a plurality of data lines, each of the data lines connecting a plurality of sub-pixels, the method comprising:
obtaining a mapping relation between gray scales of the display panel and data voltages, wherein the data voltages are voltages which are input into the data lines and drive the sub-pixels to display brightness corresponding to the gray scales;
based on the mapping relation between the gray scale and the data voltage, acquiring the data voltage corresponding to the display gray scale of each sub-pixel in the current frame;
acquiring the total signal turnover number of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line;
and if the total signal turnover number is larger than a preset threshold value, adjusting the power supply voltage of the display panel.
2. The power supply voltage adjustment method of a display device according to claim 1, characterized in that the display device further comprises a map register configured to store the map in advance;
the method for obtaining the mapping relation between the gray scale and the data voltage of the display panel comprises the following steps:
detecting whether the mapping relation between the gray scale of the display panel and the data voltage exists in the mapping relation register;
and if the mapping relation exists in the mapping relation register, acquiring the mapping relation from the mapping relation register.
3. The method of claim 2, wherein the display device further comprises a power management integrated circuit, the power management integrated circuit being connected to the display panel; the method further comprises the steps of:
if the mapping relation does not exist in the mapping relation register, gamma voltages corresponding to gray scales of all binding points are read from the power management integrated circuit;
based on the gamma voltages corresponding to the gray scales of all binding points, acquiring gray scale voltages corresponding to all gray scales by adopting a linear interpolation mode;
determining the gray scale voltage corresponding to the full gray scale as the mapping relation between the gray scale of the display panel and the data voltage;
and storing the mapping relation in the mapping relation register.
4. The method according to claim 1, wherein obtaining the total number of signal inversions of the current frame based on the data voltages corresponding to the respective sub-pixels connected on each of the data lines, comprises:
based on each data line, acquiring a voltage difference value of data voltages corresponding to any two adjacent sub-pixels on the data line;
and determining the sum of absolute values of all voltage difference values on all data lines as the total signal turnover number of the current frame.
5. The method of power supply voltage adjustment for a display device according to claim 4, wherein determining the sum of absolute values of respective voltage differences on all data lines as the total number of signal inversions of the current frame comprises:
determining the total number of signal inversions of the current frame by the following formula:
wherein Toggle is the total number of signal inversions of the current frame, line_1 is the 1 st data line, line_w is the w data line, w is the number of data lines, and w is a positive integer; i is an integer greater than or equal to 2 and less than or equal to h, h is the number of sub-pixels connected on each data line, and h is a positive integer; v (g) i ) For the data voltage corresponding to the ith sub-pixel, V (g i-1 ) The data voltage corresponding to the i-1 th sub-pixel.
6. The method of adjusting a power supply voltage of a display device according to claim 1, wherein adjusting the power supply voltage of the display panel comprises:
acquiring an initial power supply voltage of the display panel;
acquiring the power supply voltage corresponding to the current frame based on the initial power supply voltage, the preset target power supply voltage and the position of the current frame in the time length of the vertical time sequence blank area of each frame;
and adjusting the power supply voltage of the display panel to be the power supply voltage corresponding to the current frame.
7. A power supply voltage adjustment apparatus of a display device, the display device comprising a display panel, the display panel comprising a plurality of data lines, each of the data lines connecting a plurality of sub-pixels, the apparatus comprising:
the mapping relation acquisition module is used for acquiring the mapping relation between the gray scale of the display panel and the data voltage, wherein the data voltage is a voltage which is input into the data line and drives the sub-pixels to display the brightness corresponding to the gray scale;
the data voltage mapping module is used for acquiring data voltages corresponding to the display gray scales of the sub-pixels in the current frame based on the mapping relation between the gray scales and the data voltages;
the signal turnover calculation module is used for acquiring the total number of signal turnover of the current frame based on the data voltage corresponding to each sub-pixel connected on each data line;
and the power supply voltage adjusting module is used for adjusting the power supply voltage of the display panel if the total signal turnover number is larger than a preset threshold value.
8. The power supply voltage adjustment apparatus of the display device according to claim 7, wherein the display device further includes a map register configured to store the map in advance;
the mapping relation acquisition module is used for:
detecting whether the mapping relation between the gray scale of the display panel and the data voltage exists in the mapping relation register;
and if the mapping relation exists in the mapping relation register, acquiring the mapping relation from the mapping relation register.
9. The power supply voltage adjustment device of a display apparatus according to claim 8, wherein the display apparatus further comprises a power management integrated circuit connected to the display panel; the mapping relation acquisition module is further used for:
if the mapping relation does not exist in the mapping relation register, gamma voltages corresponding to gray scales of all binding points are read from the power management integrated circuit;
based on the gamma voltages corresponding to the gray scales of all binding points, acquiring gray scale voltages corresponding to all gray scales by adopting a linear interpolation mode;
determining the gray scale voltage corresponding to the full gray scale as the mapping relation between the gray scale of the display panel and the data voltage;
and storing the mapping relation in the mapping relation register.
10. A display device employing the power supply voltage adjustment method of a display device according to any one of claims 1 to 6, or the power supply voltage adjustment apparatus of a display device according to any one of claims 7 to 9.
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