CN113744684B - Display control method, display control device and display device - Google Patents
Display control method, display control device and display device Download PDFInfo
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- CN113744684B CN113744684B CN202110966546.2A CN202110966546A CN113744684B CN 113744684 B CN113744684 B CN 113744684B CN 202110966546 A CN202110966546 A CN 202110966546A CN 113744684 B CN113744684 B CN 113744684B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2330/021—Power management, e.g. power saving
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Abstract
Disclosed are a display control method, a display control device and a display device, which convert input image data into a YCbCr color space, obtain luminance distribution information of the input image according to a luminance component of the YCbCr color space, obtain matching information according to the luminance distribution information, convert a first gray scale of each pixel unit of the input image data into a second gray scale according to the matching information, and perform display driving according to the second gray scale, wherein the luminance distribution information includes a difference between typical luminance values of each pixel unit in at least two luminance sections, and the larger the difference between the typical luminance values of the at least two luminance sections is, the larger the difference between the first gray scale and the second gray scale of the pixel unit with the adjusted gray scale is, the larger the degree of dispersion of the luminance distribution of the input image is, the larger the degree of luminance reduction of the finally displayed image is, and the display power consumption reduction effect can be improved and the service life of a light emitting device can be prolonged under the condition of guaranteeing the validity of information expression of the displayed image.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display control method, a display control apparatus, and a display apparatus.
Background
Because of the characteristics of the Light Emitting device, the output current of the LED (Light-Emitting Diode) display or the OLED (Organic Light-Emitting Diode) display is proportional to the operating voltage, so that the operating voltage is reduced, the display power consumption is reduced, and the lifetime of the Light Emitting device is also prolonged.
In the related art, as shown in fig. 1, three primary color pixel unit information of input image information is converted into a YCbCr color space in step S101, Y components (Y component is a luminance component obtained from three primary color gray levels, Y = Kr × R + Kg + G + Kb, kr + Kg + Kb =1, R, G, B are red, green, blue gray levels of the pixel unit, respectively) are extracted from the YCbCr color space in step S102, and an average value of the Y components of all the pixel units is obtained, a display look-up table is obtained by an automatic current limiting algorithm based on the average value of the Y components in step S103, an offset value of the Y component is obtained from the display look-up table in step S104, an offset value thereof is added to the Y component of each pixel unit of the input image information in step S105 to obtain a new Y component, and three primary color pixel unit information of each pixel unit of the output image information is obtained by inverse transformation based on the new Y component in step S016 to drive the three gray levels of each pixel unit of the output image information. The new Y component is smaller than the original Y component corresponding to the power consumption reduction requirement, the three-primary-color gray scale of each pixel unit of the output image information obtained after inverse transformation is smaller than the corresponding original gray scale, and the power consumption of the light-emitting device can be effectively reduced in the process of display driving according to the three-primary-color gray scale of each pixel unit of the output image information.
As shown in fig. 2, the original corresponding relationship is R1 (display lookup table) corresponding to the three primary color gray scales, after adjustment, the corresponding relationship is adjusted to R2, the output gray scale is smaller than the input gray scale, and the display brightness of each pixel unit of the output image is reduced as a whole compared with the display brightness of each pixel unit of the original image.
As shown in fig. 3, it can be seen that the display luminance is reduced as a whole according to the adjusted luminance correspondence Y2, compared to the one-to-one original luminance correspondence Y1, corresponding to the Y component of the YCbCr color space.
However, referring to fig. 5A to 5C, the average values of the gray levels of the pixel units are 127, and the average values of the Y components in the YCbCr color space corresponding to all the pixel units are equal in size, according to the prior art control scheme, the overall brightness reduction degree is the same, but the gray level distribution of the pixel units of fig. 5B is extreme, and the display brightness of the high brightness portion thereof can be significantly reduced more without affecting the information expression of the display image thereof, i.e. according to the prior art control scheme, the display power consumption has a further reduced space.
Disclosure of Invention
In view of the above-described problems, it is an object of the present invention to provide a display control method, a display control apparatus, and a display apparatus, whereby display power consumption is further reduced while ensuring effective expression of display information.
According to an aspect of the present invention, there is provided a display control method including:
acquiring brightness distribution information according to first brightness information of each pixel unit of input image data;
obtaining matching information according to the brightness distribution information;
converting the first gray scale of each pixel unit into a second gray scale according to the matching information so as to perform display driving according to the second gray scale of each pixel unit,
the brightness distribution information includes a difference between typical brightness values of the pixel units in at least two brightness intervals, and the larger the difference between the typical brightness values of the at least two brightness intervals is, the larger the difference between the first gray scale and the second gray scale of the pixel unit with the adjusted gray scale is.
Optionally, the matching information includes a display lookup table, an abscissa represented by a curve of the display lookup table is input pixel unit data, and an ordinate is output pixel unit data, and the step of obtaining the matching information according to the luminance distribution information includes:
and dividing the display lookup table into at least two sections according to the brightness distribution information, and reducing the slope of at least one section of the at least two sections.
Optionally, the larger the difference of typical luminance values of the at least two luminance sections is, the more the slope of at least one section of the at least two sections is reduced.
Optionally, the pixel unit data of the display lookup table corresponds to three primary color gray scales.
Optionally, the pixel unit data of the display lookup table is a luminance component of a YCbCr color space, and the display control method further includes:
converting the three-primary-color gray scale of each pixel unit of the input image data into a YCbCr color space;
obtaining a second brightness component of each pixel unit in a YCbCr color space according to the matching information;
and converting the data of the pixel units in the YCbCr color space into a three-primary-color space according to the second brightness component of each pixel unit in the YCbCr color space to obtain the second gray scale of each pixel unit.
Optionally, the matching information is a piecewise function, and each piecewise function corresponds to a straight line segment or a curved line segment.
Alternatively, the typical luminance is an average value of luminances of pixel units within a corresponding luminance interval,
or, the number of pixel units with the luminance being the typical luminance is the largest.
According to another aspect of the present invention, there is provided a display control apparatus including:
the converter is used for converting pixel unit information of each pixel unit of input image data from a three-primary-color space to a YCbCr color space, wherein the input image data are the three-primary-color data of each pixel unit;
the analyzer is used for obtaining the brightness distribution information of the input image data according to the brightness component of each pixel unit of the input image data in the YCbCr color space;
a matching information generating unit for obtaining matching information according to luminance distribution information of the input image data;
a conversion unit for converting the first gray scale of each pixel unit of the input image data into a second gray scale according to the matching information to perform display driving according to the second gray scale,
the brightness distribution information includes a difference between typical brightness values of the pixel units in at least two brightness intervals, and the larger the difference between the typical brightness values of the at least two brightness intervals is, the larger the difference between the first gray scale and the second gray scale of the pixel unit with the adjusted gray scale is.
Optionally, the matching information is a lookup table of luminance components of a YCbCr color space, and the converting unit includes:
the processor is used for obtaining a second brightness component of each pixel unit in the YCbCr color space according to the lookup table of the brightness component of the YCbCr color space and the brightness component of each pixel unit in the YCbCr color space;
and the second converter is used for obtaining the second gray scale of each pixel unit in the three-primary-color space according to the second brightness component of each pixel unit in the YCbCr color space.
Optionally, the matching information includes three lookup tables of a three-primary color space, the three lookup tables respectively correspond to three primary colors, and the converting unit includes:
and the second processor is used for converting the first gray scale of each pixel unit of the input image data into a second gray scale according to the three lookup tables of the three primary color space.
Optionally, the matching information is a piecewise function, and each piecewise function corresponds to a straight line segment or a curved line segment.
Optionally, the display control apparatus is used for a driving circuit of a display panel, the display panel includes a light emitting diode array, and the driving circuit controls the light emitting brightness of a corresponding light emitting diode of the light emitting diode array according to the second gray scale;
the light emitting diode array includes at least one of a micro light emitting diode, a mini light emitting diode, a quantum dot light emitting diode, and an organic light emitting diode.
According to still another aspect of the present invention, there is provided a display device characterized by including the display control device provided according to the present invention.
The display control method provided by the invention obtains matching information according to the difference of typical brightness values of each pixel unit of input image data in at least two brightness intervals, converts the first gray scale of each pixel unit into the second gray scale according to the matching information, and performs display driving according to the second gray scale, wherein the larger the difference of typical brightness values of at least two brightness intervals is, the larger the display brightness difference of the input image is, the larger the reduction degree of the second gray scale of the pixel unit corresponding to high brightness compared with the first gray scale is, the larger the reduction degree of the actual display brightness of the high-brightness part of the input image is, and the larger the reduction degree of the display power consumption is, when the display brightness contrast of the input image is larger, the larger the reduction degree of the brightness of the high-brightness display area is, and the display power consumption is further reduced while the effectiveness of the display information expression is ensured.
The display control device provided by the invention converts each pixel unit information of input image data into YCbCr color space through the color converter, extracts the brightness component from the YCbCr color space, the analyzer provides the brightness distribution information of the input image according to the brightness component of each pixel unit, the matching information generating unit generates the matching information according to the brightness distribution information of the input image, and the converting unit converts the first gray scale of each pixel unit of the input image information into the second gray scale according to the matching information so as to perform display driving according to the second gray scale. The brightness distribution information comprises the difference of typical brightness values of the pixel units in at least two brightness intervals, and the larger the difference of the typical brightness values of the at least two brightness intervals is, the larger the difference of the first gray scale and the second gray scale of the pixel unit with the adjusted gray scale is, so that for a display image with a larger brightness difference, the reduction degree of the display brightness can be improved and the effect of reducing the display power consumption can be improved under the condition of ensuring that the display information is effective.
The display device provided by the invention comprises the display control device provided by the invention, and the display control device can improve the reduction degree of the display brightness and improve the effect of reducing the display power consumption under the condition of ensuring the effective display information of the display image with larger brightness difference.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 shows a flow chart of a display control method according to the prior art;
fig. 2 and 3 are diagrams illustrating matching relationship between input and output gray scales and brightness according to a related art display control method;
fig. 4 shows a flowchart of a display control method according to an embodiment of the present invention;
fig. 5A, 5B, and 5C show luminance distribution examples of the display control method according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram showing a display control apparatus according to an embodiment of the present invention;
fig. 7 is a schematic configuration diagram showing another display control apparatus according to an embodiment of the present invention;
fig. 8 shows a matching relationship of an output gray scale and an input gray scale of the display control method according to the embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In the various figures, like elements are identified with the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 4 shows a flowchart of a display control method according to an embodiment of the present invention.
As shown in fig. 4, in step S201, the three primary color pixel element information of the input image information is converted into the YCbCr color space.
In step S202, a Y component is extracted from the YCbCr color space, and luminance distribution information of the input image information is obtained from the Y component of each pixel.
In step S203, the number of pixels of at least two luminance sections and a typical luminance value of each luminance section are obtained from the luminance distribution information.
The luminance distribution is as shown in fig. 5A to 5C, in the example of fig. 5A, the luminance of each pixel unit of the image is 127, in the example of fig. 5B, the pixel units of the image are divided into two groups, the luminance of each pixel unit of the two groups of pixel units is 0 and 255, respectively, in the example of fig. 5C, the pixel units of the image are divided into two groups, the luminance of each pixel unit of the two groups of pixel units is 120 and 134, respectively, and the average value of the luminance of each group is 127.
In the above examples, the luminance of all the pixel cells is a single value or a double value, and each luminance distribution region of the luminance distribution information is not a corresponding single value and has a certain luminance range, and the average value in the corresponding luminance range can be regarded as a typical luminance value.
In step S204, a display look-up table is obtained from the difference of the typical luminance values of the respective luminance sections. The typical brightness value is the average brightness value of each pixel unit in the corresponding brightness interval, or the maximum number of the pixel units of the brightness, or the average brightness value of the brightness concentrated region.
In step S205, the gradation of each pixel of the input image information is converted into the gradation of each pixel of the output image information according to the display lookup table.
In step S206, display driving is performed according to the gradation of each pixel outputting image information.
Fig. 6 is a schematic structural diagram illustrating a display control apparatus according to an embodiment of the present invention.
As shown in fig. 6, the display control apparatus 20 includes a converter 21, an analyzer 22, a display look-up table generator 23, and a first processor 24.
The converter 21 converts the three primary color gray scales RGB-IN of each pixel unit of the input image data into a YCbCr color space and provides a Y component (luminance component) of each pixel unit to the analyzer 22, the analyzer 22 obtains luminance distribution information of an image corresponding to the input image data according to the luminance component of each pixel unit of the input image data and provides the luminance distribution information to the display look-up table generator 23, the display look-up table generator 23 obtains three display look-up tables R-LUT, G-LUT, B-LUT according to the luminance distribution information, corresponding to the red pixel display look-up table, the green pixel display look-up table, and the blue pixel display look-up table, respectively, each display look-up table is provided to the first processor 24, the first processor 24 matches each primary color gray scale of each pixel unit of the input image data with the corresponding display look-up table, and converts the three primary color gray scales RGB-OUT of each pixel unit providing the output image data.
Fig. 7 is a schematic structural diagram showing another display control apparatus according to an embodiment of the present invention.
Referring to fig. 7, the display control apparatus 30 includes a converter 31, an analyzer 32, a display look-up table generator 33, a second processor 34, and a second converter 35.
The converter 31 is configured to convert the three primary colors of each pixel unit of the input image data into the YCbCr color space, and supply the luminance component Y1 of each pixel unit to the analyzer 32, and supply the density offset components CbCr of blue and red to the second converter 35.
The analyzer 32 provides the luminance distribution information of the image corresponding to the input image information to the display look-up table generator 33 according to the luminance component Y1 of each pixel unit, the display look-up table 33 provides the luminance display look-up table Y-LUT according to the luminance distribution information, and the second processor 34 converts the original luminance component Y1 of each pixel unit into a new luminance component Y2 according to the luminance display look-up table Y-LUT.
The new luminance component Y2 is inversely transformed by the second converter 35 in combination with the density shift amount components CbCr of blue and red of each pixel unit, to obtain the three primary color gray scales RGB-OUT of the output image information.
Only one display look-up table is needed to regulate the brightness component.
Fig. 8 shows a matching relationship of an output gray scale and an input gray scale of the display control method according to the embodiment of the present invention. In this embodiment, a display lookup table showing the matching relationship is shown in a curved representation.
Referring to fig. 8, taking the gray level of a red pixel as an example, the red pixel display lookup table without the regulated input gray level and the output gray level corresponds to a straight line R1, the matching relationship between the output gray level and the input gray level regulated by the display control method of the embodiment of the present invention is a broken line R3, in this embodiment, taking two luminance intervals (the number and the interval boundary can be preset, or set according to the luminance distribution) as an example, the turning point gray level is 127, the gray level of the pixel unit corresponding to the gray level of the red pixel less than 127 is unchanged, the gray level of the pixel unit corresponding to the gray level greater than 127 when actually displaying is reduced according to the matching relationship of R2, the luminance of the high-luminance display area is reduced, the driving current of the corresponding pixel unit is reduced, and the power consumption is reduced.
In an alternative embodiment, the luminance section is plural, the ratio (slope) of the output gray scale to the input gray scale decreases sequentially from the low luminance section to the high luminance section, and the ratio of the output gray scale to the input gray scale of the luminance section with the lowest luminance is not limited to be constant.
In this embodiment, the matching information for controlling the three primary color gray scale and the brightness component is represented by a display lookup table, the corresponding matching information generating unit is a display lookup table generator, one kind of matching information corresponds to one display lookup table, the display lookup table lists all matching relations between the output gray scale and the input gray scale, and the output gray scale can be obtained by directly converting the display lookup table according to the input gray scale without any operation. In an alternative embodiment, the matching information is represented by a function, the corresponding matching information generating unit is a function generator, and the corresponding function is, for example:
for three primary color gray scale calculation, R = R0 × R0+ R1, where R0 is the gray scale of the red pixel of the pixel unit of the input image information, R0 and R1 are determined according to the luminance distribution information, and R is the gray scale of the red pixel of the pixel unit of the output image information. The corresponding functions of the green and blue pixel gray levels are the same and will not be described in detail here.
Corresponding to the conversion of the YCbCr color space, Y = Y0 × Y0+ Y1, where Y0 is a luminance component of a pixel unit of the input image information, Y0 and Y1 are determined according to the luminance distribution information, and Y is a luminance component of a pixel unit of the output image information.
The matching relations of the pixel units in different brightness intervals are different, the functions are set as piecewise functions correspondingly, and r0, r1, y0 and y1 of each piecewise function are respectively confirmed. In this embodiment, each segment of function corresponds to a straight line, and in an optional embodiment, each segment of function is a curve, and the slope of each segment is greater than zero, so as to ensure the basic contrast requirement.
Table one shows the average luminance component of the output image information after the adjustment of the partial luminance distribution information. In the example of two luminance sections, the typical luminance of each section is the average luminance, and the distribution indicates the luminance distribution information corresponding to the section.
Watch 1
As can be seen from table one, the larger the distribution expression is, the lower the average luminance of the output image is, that is, the more the luminance distribution of the input image is dispersed, the greater the luminance reduction degree of the actual display image is, and the more the system power consumption is reduced when the effectiveness of the display information is ensured. The display control method of the embodiment of the invention can further reduce the display power consumption of the display images with the same brightness average value.
The display control device of the embodiment of the invention can be used for a driving circuit of a display panel with a light emitting diode array, the driving circuit is used for providing the driving current of the light emitting diodes of the light emitting diode array, and the driving circuit controls the magnitude of the driving current of the corresponding light emitting diodes according to the second gray scale provided by the display control device so as to control the brightness of the light emitting diodes. The light emitting diode array includes at least one of micro light emitting diodes, mini light emitting diodes, quantum dot light emitting diodes and organic light emitting diodes, that is, the specific type of the light emitting diode is not particularly limited in the present invention.
The display control method provided by the invention obtains matching information according to the difference of typical brightness values of each pixel unit of input image data in at least two brightness intervals, converts the first gray scale of each pixel unit into the second gray scale according to the matching information, and performs display driving according to the second gray scale, wherein the larger the difference of typical brightness values of at least two brightness intervals is, the larger the display brightness difference of the input image is, the larger the reduction degree of the second gray scale of the pixel unit corresponding to high brightness compared with the first gray scale is, the larger the reduction degree of the actual display brightness of the high-brightness part of the input image is, the larger the reduction degree of the display power consumption is, when the display brightness contrast of the input image is larger, the larger the reduction degree of the brightness of the high-brightness display area is, and the display power consumption is further reduced while the effectiveness of the display information expression is ensured.
The display control device provided by the invention converts each pixel unit information of input image data into YCbCr color space through the color converter, extracts the brightness component from the YCbCr color space, the analyzer provides the brightness distribution information of the input image according to the brightness component of each pixel unit, the matching information generating unit generates the matching information according to the brightness distribution information of the input image, and the converting unit converts the first gray scale of each pixel unit of the input image information into the second gray scale according to the matching information so as to perform display driving according to the second gray scale. The brightness distribution information comprises the difference of typical brightness values of each pixel unit in at least two brightness intervals, and the larger the difference of the typical brightness values of the at least two brightness intervals is, the larger the difference of the second gray scale and the first gray scale of the pixel unit with the adjusted gray scale is, so that for a display image with a large brightness difference, the reduction degree of the display brightness can be improved and the effect of reducing the display power consumption can be improved under the condition of ensuring that the display information is effective.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (12)
1. A display control method, comprising:
acquiring brightness distribution information according to first brightness information of each pixel unit of input image data;
obtaining matching information according to the brightness distribution information;
converting the first gray scale of each pixel unit into a second gray scale according to the matching information so as to perform display driving according to the second gray scale of each pixel unit,
the brightness distribution information comprises the difference of typical brightness values of each pixel unit in at least two brightness intervals, and the larger the difference of the typical brightness values of the at least two brightness intervals is, the larger the difference of a second gray scale and a first gray scale of the pixel unit with adjusted gray scale is;
the matching information includes a display lookup table, an abscissa represented by a curve of the display lookup table is input pixel unit data, and an ordinate is output pixel unit data, and the step of obtaining the matching information according to the luminance distribution information includes:
and dividing the display lookup table into at least two sections according to the brightness distribution information, and reducing the slope of at least one section of the at least two sections.
2. The display control method according to claim 1,
the larger the difference of typical luminance values of the at least two luminance sections is, the more the slope of at least one section of the at least two sections is reduced.
3. The display control method according to claim 1,
and the pixel unit data of the display lookup table corresponds to three primary color gray scales.
4. The display control method according to claim 1,
the pixel unit data of the display look-up table is a luminance component of a YCbCr color space, and the display control method further comprises:
converting the three-primary-color gray scale of each pixel unit of the input image data into a YCbCr color space;
obtaining a second brightness component of each pixel unit in a YCbCr color space according to the matching information;
and converting the data of the pixel units in the YCbCr color space into a three-primary-color space according to the second brightness component of each pixel unit in the YCbCr color space to obtain the second gray scale of each pixel unit.
5. The display control method according to claim 1, wherein the matching information is a piecewise function, each piecewise function corresponding to a straight line segment or a curved line segment.
6. The display control method according to claim 1,
the typical luminance is an average value of the luminances of the pixel units in the corresponding luminance interval,
or, the number of pixel units with the luminance being the typical luminance is the largest.
7. A display control apparatus, characterized by comprising:
the converter is used for converting pixel unit information of each pixel unit of input image data from a three-primary-color space to a YCbCr color space, wherein the input image data are the three-primary-color data of each pixel unit;
the analyzer is used for obtaining the brightness distribution information of the input image data according to the brightness component of each pixel unit of the input image data in an YCbCr color space;
a matching information generating unit for obtaining matching information according to luminance distribution information of the input image data;
a conversion unit for converting the first gray scale of each pixel unit of the input image data into a second gray scale according to the matching information to perform display driving according to the second gray scale,
the brightness distribution information comprises the difference of typical brightness values of each pixel unit in at least two brightness intervals, and the larger the difference of the typical brightness values of the at least two brightness intervals is, the larger the difference of a second gray scale and a first gray scale of the pixel unit with adjusted gray scale is;
the matching information includes a display lookup table, an abscissa represented by a curve of the display lookup table is input pixel unit data, and an ordinate is output pixel unit data, and the step of obtaining the matching information according to the luminance distribution information includes:
and dividing the display lookup table into at least two sections according to the brightness distribution information, and reducing the slope of at least one section of the at least two sections.
8. The display control apparatus according to claim 7, wherein the matching information is a lookup table of luminance components of a YCbCr color space, the conversion unit includes:
the processor is used for obtaining a second brightness component of each pixel unit in the YCbCr color space according to the lookup table of the brightness component of the YCbCr color space and the brightness component of each pixel unit in the YCbCr color space;
and the second converter is used for obtaining the second gray scale of each pixel unit in the three-primary-color space according to the second brightness component of each pixel unit in the YCbCr color space.
9. The display control apparatus according to claim 7, wherein the matching information includes three lookup tables of a three-primary color space, the three lookup tables corresponding to the three primary colors, respectively, the conversion unit includes:
and the second processor is used for converting the first gray scale of each pixel unit of the input image data into a second gray scale according to the three lookup tables of the three primary color space.
10. The display control apparatus according to claim 7, wherein the matching information is a piecewise function, each piecewise function corresponding to a straight line segment or a curved line segment.
11. The display control apparatus according to claim 7,
the display control device is used for a driving circuit of a display panel, the display panel comprises a light emitting diode array, and the driving circuit controls the light emitting brightness of a corresponding light emitting diode of the light emitting diode array according to the second gray scale;
the light emitting diode array includes at least one of a micro light emitting diode, a mini light emitting diode, a quantum dot light emitting diode, and an organic light emitting diode.
12. A display device characterized by comprising the display control device according to any one of claims 7 to 11.
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