CN113851090B - Display device, control method thereof and related equipment - Google Patents
Display device, control method thereof and related equipment Download PDFInfo
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- CN113851090B CN113851090B CN202111131387.0A CN202111131387A CN113851090B CN 113851090 B CN113851090 B CN 113851090B CN 202111131387 A CN202111131387 A CN 202111131387A CN 113851090 B CN113851090 B CN 113851090B
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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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The disclosure provides a display device, a control method thereof and related equipment. The display device comprises a display panel and a backlight module, wherein the display panel comprises a plurality of display partitions, the backlight module comprises a plurality of backlight partitions, and the display partitions correspond to the backlight partitions, and the method comprises the following steps: determining a target display partition of the plurality of display partitions; dividing the target display partition into a plurality of sub display partitions; determining a target gray scale value of each sub-display partition according to the gray scale value corresponding to each sub-display partition; determining the brightness of a target backlight partition corresponding to each target display partition and the scanning period for lighting the target backlight partition according to the brightness according to the target gray scale value of each sub display partition and the number of the sub display partitions; and controlling the target backlight partition according to the brightness and the scanning period.
Description
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a display device, a control method thereof and related equipment.
Background
Today, the development of information and display technology is continuously advanced, the pursuit of people on the display technology effect is also higher and higher, and the pursuit of people on high contrast and high color gamut of the traditional LCD display screen is gradually not satisfied. In the related art, the backlight module is independently controlled by taking a plurality of light emitting units as a group, namely, the partition control is realized, the local partition dimming can be realized, and the backlight module has higher brightness and contrast ratio compared with the traditional backlight. However, this control method has a halation problem in that the boundary edge between the bright area and the dark area is not clearly defined, and a halation phenomenon is formed.
Disclosure of Invention
The disclosure provides a display device, a control method thereof and related equipment.
In a first aspect of the present disclosure, a control method of a display device is provided, the display device includes a display panel and a backlight module, the display panel includes a plurality of display partitions, the backlight module includes a plurality of backlight partitions, and the display partitions correspond to the backlight partitions, the method includes:
determining a target display partition of the plurality of display partitions;
dividing the target display partition into a plurality of sub display partitions;
Determining a target gray scale value of each sub-display partition according to the gray scale value corresponding to each sub-display partition;
determining the brightness of a target backlight partition corresponding to each target display partition and the scanning period for lighting the target backlight partition according to the brightness according to the target gray scale value of each sub display partition and the number of the sub display partitions; and
and controlling the target backlight partition according to the brightness and the scanning period.
In a second aspect of the present disclosure, there is provided a display device including:
the display device comprises a display panel and a backlight module, wherein the display panel comprises a plurality of display partitions, the backlight module comprises a plurality of backlight partitions, and the display partitions correspond to the backlight partitions;
one or more processors, memory; and
one or more programs;
wherein the one or more programs are stored in the memory and executed by the one or more processors, the programs comprising instructions for performing the method according to the first aspect.
In a third aspect of the present disclosure, there is provided a non-transitory computer readable storage medium containing a computer program which, when executed by one or more processors, causes the processors to perform the method of the first aspect.
In a fourth aspect of the present disclosure, there is provided a computer program product comprising computer program instructions which, when run on a computer, cause the computer to perform the method of the first aspect.
According to the display device, the control method and the related equipment thereof, dimming of the backlight subareas is optimized in a scanning compensation and algorithm compensation mode, so that the gradual change display effect of the subareas is improved, and the halation problem is well solved.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure or related art, the drawings required for the embodiments or related art description will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
Fig. 1A shows a schematic diagram of an exemplary display device provided by an embodiment of the present disclosure.
Fig. 1B shows a schematic view of an exemplary backlight module according to an embodiment of the present disclosure.
Fig. 1C illustrates a schematic diagram of a partition of an exemplary backlight module according to an embodiment of the present disclosure.
Fig. 1D illustrates a partitioned schematic of an exemplary display panel according to an embodiment of the present disclosure.
Fig. 1E shows a schematic diagram of an exemplary display with a halation effect.
Fig. 2A shows a schematic diagram of a display partition of a display panel divided into a plurality of sub-display partitions according to an embodiment of the present disclosure.
Fig. 2B illustrates a schematic diagram in which a scan time is divided into a plurality of scan periods according to an embodiment of the present disclosure.
Fig. 3 shows a flow diagram of an exemplary method provided by an embodiment of the present disclosure.
Detailed Description
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in embodiments of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The embodiment of the disclosure provides a display device, which comprises a display panel, a backlight module, one or more processors and a memory; and one or more programs, wherein the one or more programs are stored in the memory and executed by the one or more processors, the programs including instructions for performing a method of controlling the display device. The display device can solve the problems of backlight heating and higher power consumption of the display device to a certain extent.
Fig. 1A shows a schematic diagram of an exemplary display device 100 provided by an embodiment of the present disclosure.
As shown in fig. 1A, the display device 100 may include a display panel 102, a backlight module 104, and one or more processors 106, a memory 108, an input/output interface 110, a communication interface 112, and a bus 114. Wherein the processor 106, the memory 108, the input/output interface 110 and the communication interface 112 are communicatively coupled to each other within the device via a bus 114.
The processor 106 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 108 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. The memory 108 may store an operating system and other application programs, and when the technical solutions provided by the embodiments of the present specification are implemented in software or firmware, relevant program codes are stored in the memory 108 and invoked by the processor 106 for execution.
The input/output interface 110 is used for connecting with an input/output module to realize information input and output. For example, the input/output interface 110 may be electrically coupled to the display panel 102 and the backlight module 104, respectively, so as to output the control instructions generated by the processor 106 to the display panel 102 and the backlight module 104 correspondingly, thereby controlling the display panel 102 to display the display data and controlling the backlight module 104 to be turned on. The input/output module may be configured as a component in a device (not shown) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include speakers, vibrators, indicator lights, etc.
The communication interface 112 is used to connect a communication module (not shown in the figure) to enable communication interaction of the display apparatus 100 with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).
It should be noted that, although the display device 100 only shows the display panel 102, the backlight module 104, the processor 106, the memory 108, the input/output interface 110, the communication interface 112, and the bus 114, in the implementation process, the display device 100 may further include other components necessary for implementing normal operation. Further, it will be understood by those skilled in the art that the display device 100 may include only the components necessary for implementing the embodiments of the present disclosure, and not all the components shown in fig. 1A.
Fig. 1B shows a schematic diagram of an exemplary backlight module 104 according to an embodiment of the disclosure.
As shown in fig. 1B, a plurality of light emitting units 1042 may be arranged on the backlight module 104 in an array, and the light emitting units 1042 may be light emitting devices such as LED, miniLED, microLED. In some embodiments, the light emitting units 1042 may be driven individually, i.e., each light emitting unit 1042 corresponds to an independent driving signal. In other embodiments, the backlight module 104 may be divided into a plurality of partitions, each of which includes a plurality of light emitting units 1042, for example, as shown in fig. 1B, the backlight module 104 is divided into 16 partitions by dotted lines. Each of the partitions may be individually driven, that is, the light emitting units 1042 in the same partition may be lighted with the same driving signal and have the same brightness. Such a partition controlled backlight module may also be referred to as a local dimming (local dimming) backlight module.
Fig. 1C shows a schematic diagram of a partition of an exemplary backlight module 104 according to an embodiment of the disclosure.
As shown in fig. 1C, the backlight module 104 is divided into 16 backlight partitions 104a to 104u. The plurality of light emitting units in the single backlight partition are lighted by the same driving signal and have the same brightness.
Fig. 1D shows a schematic view of a partition of an exemplary display panel 102 according to an embodiment of the present disclosure.
As shown in fig. 1D, the display area of the display panel 102 may be divided into 16 display partitions 102a to 102u based on the partition mode of the backlight module 104. Each display partition may include a plurality of pixel points, and each pixel point may have a corresponding gray-scale value in one frame of display screen, where the gray-scale value is represented in display data for driving the display panel 102. The display sections 102 a-102 u and the backlight sections 104 a-104 u may be in a one-to-one correspondence, i.e., the backlight sections are used to provide backlight for the display sections corresponding thereto. For example, backlight partition 104a is used to provide backlighting for display partition 102a, backlight partition 104b is used to provide backlighting for display partition 102b, and so on.
Considering the efficiency of data processing, as can be seen from fig. 1C, the number of backlight partitions is limited, so that in some areas with obvious brightness variation of the display screen, a halation problem occurs, and the display effect is affected by halation from a high-brightness area to a low-brightness area. In particular, when a miniLED is used as the light emitting unit 1042, such a halation effect is more remarkable.
This is because, in some algorithms, in order to secure brightness, a brightness maximum algorithm is generally employed, that is, by gray-scale maximum values among all pixels within a display section as reference values for calculating brightness of a corresponding backlight section. Then, the problem of halation is unavoidable.
Fig. 1E shows a schematic diagram of an exemplary display with a halation effect. As shown in fig. 1E, in the boundary region between the bright region and the dark region, the boundary therebetween is not clear, and there is a halation problem.
In order to improve the halation problem, the display device 100 provided by the embodiments of the present disclosure may implement backlight control and display control in the following manner.
The display device 100 may first determine a target display section among a plurality of display sections (e.g., the display sections 102a to 102u of fig. 1D), for example, determine the display section 102f of fig. 1D as the target display section.
Then, the display apparatus 100 may divide the target display section 102f into a plurality of sub-display sections. Fig. 2A shows a schematic diagram of a display partition of the display panel 102 divided into a plurality of sub-display partitions according to an embodiment of the present disclosure. As shown in fig. 2A, the display section 102f is divided into 4 sub-display sections 1022f to 1028f by way of example.
Next, the display device 100 may determine the target gray-scale value g corresponding to each of the sub-display sections 1022f to 1028f from the gray-scale values corresponding to each of the sub-display sections 1022f to 1028f of the target display section 102f target_1022f ～g target_1028f 。
In some embodiments, to determine the target gray level value g target_1022f ～g target_1028f The display device 100 may first determine a target sub-display section, e.g., the sub-display section 1022f, of the plurality of sub-display sections 1022 f-1028 f. Then, the gray-scale values of all the pixels in the target sub-display section 1022f are determined and the maximum gray-scale value g of the gray-scale values of all the pixels in the target sub-display section 1022f is determined 1022f_max Determining a target gray-scale value g of the target sub-display section 1022f target_1022f 。
In some embodiments, for example, the display device 100 may directly determine the maximum gray-scale value of the gray-scale values of all the pixels in the target sub-display section 1022f as the target gray-scale value g of the target sub-display section 1022f target_1022f 。
In other embodiments, in consideration of the influence of the adjacent partition on the current partition, the gray-scale compensation may be performed on the target gray-scale value of the sub-display partition in the target display partition 102f according to the brightness of the adjacent display partition (e.g., the display partitions 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m of fig. 1D) of the target display partition 102f, so as to improve the display effect.
In performing the gray-scale compensation, the display device 100 may first determine whether or not the luminance distribution of a plurality of display sections (for example, the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m of fig. 1D) adjacent to the target display section 102f satisfies the luminance distribution dispersion condition. The luminance distribution dispersion condition is used to determine whether or not the luminance distribution of the adjacent display sections of the target display section 102f is comparatively dispersed, for example, when a plurality of display sections are each displayed in a dark state, in which there is a small area displayed in a bright state, such a luminance distribution that the halation problem thereof is more noticeable, and thus special treatment is required.
In some embodiments, the display apparatus 100 may determine whether the luminance distribution of a plurality of display sections adjacent to the target display section 102f satisfies the luminance distribution dispersion condition in the following manner:
it is first determined whether the difference between the maximum and minimum of the maximum gray-scale values (i.e., the maximum of the gray-scale values of all pixels of the display section) of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m is greater than a gray-scale difference threshold. For example, the maximum gray level values of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m are respectively 70, 80, 90, 180, 220, 20, 30, and therefore, the maximum value is 220 and the minimum value is 20, the difference is 200, and the difference 200 is greater than the gray level difference threshold 180 assuming that the gray level difference threshold is 180.
If the difference between the maximum and minimum of the maximum gray scale values of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m is greater than the gray scale difference threshold, it is further determined whether the ratio of the area of the display section having the maximum among the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m to the total area of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m is less than the ratio threshold. For example, the maximum gray scale values of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m are 70, 80, 90, 180, 220, 20, 30, respectively, with the display section having the largest value 220 being the display section 102j, and therefore, the area ratio is 1/8=12.5%, and the area ratio 12.5% is less than the ratio threshold 15% assuming that the ratio threshold is 15%. For another example, the maximum gray scale values of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m are 70, 80, 90, 220, 20, 30, respectively, wherein the display section having the largest value 220 is the display sections 102g and 102j, and thus, the area ratio is 2/8=25%, and the area ratio 25% is greater than the ratio threshold 15% assuming that the ratio threshold is 15%.
If the ratio is smaller than the ratio threshold, it is indicated that the luminance distribution of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m satisfies the luminance distribution dispersion condition, that is, the luminance distribution of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m is more dispersed; conversely, if the ratio is greater than or equal to the ratio threshold, it is indicated that the luminance distribution of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m does not satisfy the luminance distribution dispersion condition, that is, the luminance distribution of the display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m is not dispersed.
Next, when the brightness distribution of the display partitions 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m satisfies the brightness distribution dispersion condition, the display device 100 may calculate the target gray-scale value g of the target sub-display partition 1022f using a first gray-scale compensation algorithm (e.g., center+perimeter average-perimeter minimum brightness compensation method) target_1022f 。
In some embodiments, the first gray level compensation algorithm may include the steps of:
first, the target display area 102f and the sub-display areas 1022a to 1028a, 1022b to 1028b, 1022c to 1028c, 1022e to 1028e, 1022g to 1028j, 1022k to 1028k, 1022m to 1028m of the plurality of display areas 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m adjacent to the target display area 102f are respectively sorted according to the maximum gray scale values of the sub-display areas. For example, the sub-display sections 1022a to 1028a may have maximum gray-scale values of 200, 188, 60, and 127, respectively, and may have maximum gray-scale values of 1022a, 1024a, 1028a, and 1026a in order from the largest gray-scale value, and may have maximum gray-scale values of 1026a, 1028a, 1024a, and 1022a in order from the largest gray-scale value. Similarly, the sub-display sections of other display sections may be ordered.
After ordering the sub-display sections, a maximum gray-scale value g for each sub-display section corresponding to the serial number of the target sub-display section 1022f among the plurality of display sections adjacent to the target display section 102f may be determined i_max And a maximum gray-scale value g of all sub-display sections corresponding to the serial number of the target sub-display section 1022f among the plurality of display sections adjacent to the target display section 102f i_max Minimum value g of (2) min_max . Assuming that the number of the target sub-display section 1022f is 1, after the sub-display sections of each display section are ordered, the sub-display sections with the number of 1 are 1022a, 1022b, 1022c, 1022e, 1022g, 1022j, 1022k, 1022m, and the maximum gray-scale values of these sub-display sections are denoted as g 1022a_max 、g 1022b_max 、g 1022c_max 、g 1022e_max 、g 1022g_max 、g 1022j_max 、g 1022k_max 、g 1022m_max Assuming that the maximum gray-scale values are 70, 80, 90, 180, 220, 20, 30, respectively, the minimum value g thereof min_max 20.
Meanwhile, the maximum gray-scale value g of each sub-display section corresponding to the serial number of the target sub-display section 1022f in the plurality of display sections adjacent to the target display section 102f is calculated i_max Maximum gray-scale average g of (2) avg_max . For example, (70+70+80+90+180+220+20+30)/8=95.
Then, the target gray-scale value of the target sub-display section 1022f is calculated according to the following formula:
g target ＝g target_max +g avg_max -g min_max ＝120+95-20＝195
Wherein g target_max For the maximum gray-scale value of the gray-scale values of all the pixels in the target sub-display section 1022f, the value is 120 in the foregoing example.
Therefore, in order to avoid the situation that the brightness distribution of the subareas is scattered, namely the subareas are isolated, namely the subareas are too bright or too dark, the brightness compensation cannot be carried out at one time, and the minimum value of the peripheral brightness is subtracted from the average value compensation value in an algorithm, so that the subarea compensation values are respectively close to the peripheral subareas, and soft transition is realized.
When the luminance distribution of the display partition 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m does not satisfy the luminance distribution dispersion condition, the display device 100 may calculate the target gray-scale value g of the target sub-display partition 1022f using a second gray-scale compensation algorithm (e.g., center+perimeter mean compensation method) target_ 1022f 。
In some embodiments, the second gray level compensation algorithm may include the steps of:
similarly, the target display section 102f and the plurality of sub-display sections 1022a to 1028a, 1022b to 1028b, 1022c to 1028c, 1022e to 1028e, 1022g to 1028g, 1022j to 1028j, 1022k to 1028k, 1022m to 1028m of the plurality of display sections 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m adjacent to the target display section 102f are first sorted according to the maximum gray-scale values of the sub-display sections, respectively. For example, the sub-display sections 1022a to 1028a may have maximum gray-scale values of 200, 188, 60, and 127, respectively, and may have maximum gray-scale values of 1022a, 1024a, 1028a, and 1026a in order from the largest gray-scale value, and may have maximum gray-scale values of 1026a, 1028a, 1024a, and 1022a in order from the largest gray-scale value. Similarly, the sub-display sections of other display sections may be ordered.
After ordering the sub-display sections, a maximum gray-scale value g for each sub-display section corresponding to the serial number of the target sub-display section 1022f among the plurality of display sections adjacent to the target display section 102f may be determined i_max . Assuming that the number of the target sub-display section 1022f is 1, after the sub-display sections of each display section are ordered, the sub-display sections with the number of 1 are 1022a, 1022b, 1022c, 1022e, 1022g, 1022j, 1022k, 1022m, and the maximum gray-scale values of these sub-display sections are denoted as g 1022a_max 、g 1022 b _max 、g 1022c_max 、g 1022e_max 、g 1022g_max 、g 1022j_max 、g 1022 k _max 、g 1022m_max It is assumed that the values of these maximum gray-scale values are 70, 80, 90, 40, 50, 20, 30, respectively.
Then, the maximum gray-scale value g of each sub-display section corresponding to the serial number of the target sub-display section 1022f among the plurality of display sections adjacent to the target display section 102f is calculated i_max Maximum gray-scale average g of (2) avg_max . For example, (70+70+80+90+40+50+20+30)/8≡56.
Finally, the target gray scale value for the target sub-display section 1022f is calculated according to the following formula:
g target ＝g target_max +g avg_max ＝120+56＝176
wherein g target_max For the maximum gray-scale value of the gray-scale values of all the pixels in the target sub-display section 1022f, the value is 120 in the foregoing example.
It can be seen that the target gray scale value g of the target sub-display section 1022f can be determined in the above manner target_1022f Similarly, when sub-display sections 1024f, 1026f, 1028f are respectively determined as target sub-display sections, the corresponding target gray-scale value g can be determined in the above manner target_1024f ～g target_1028f 。
In the above manner, the target gray-scale value g of the sub-display sections 1022f to 1028f of the target display section 102f is determined target_1022f ～g target_1028f After that, similarly, after the other display sections (for example, the display sections 102a, 102b, 102c, 102D, 102e, 102g, 102h, 102j, 102k, 102m, 102n, 102o, 102p, 102q, 102u of fig. 1D) are determined as the target display sections, the target gray-scale values of the sub-display sections of the respective display sections may also be calculated in the same manner.
The backlight partition is considered as the smallest controllable unit, which is spatially limited and thus compensated from the point of view of the scanning time. Accordingly, the target gray-scale value g of each of the sub-display sections 1022f to 1028f in the target display section 102f is determined target_1022f ～g target_1028f After thatThe display apparatus 100 may determine the brightness of the target backlight section 104f corresponding to the target display section 102f and the scanning period for lighting the target backlight section 104f according to the brightness according to the target gray scale value of each sub-display section and the number of sub-display sections.
In some embodiments, the display apparatus 100 may determine the brightness and the corresponding scan period using the following method:
The display device 100 may first determine a scan time t corresponding to the target backlight partition. In the process of displaying a frame of image on the display device 100, since each backlight partition of the backlight module 104 is separately driven (i.e. one backlight partition corresponds to one driving signal), in order to transmit its corresponding driving signal to each backlight partition during the time of displaying a frame of image, the time of displaying a frame of image needs to be divided into a plurality of portions, each time portion is used for driving the corresponding backlight partition (i.e. transmitting its driving signal to its corresponding backlight partition during the corresponding time portion), and such time portion is the scan time t corresponding to the backlight partition. As shown in fig. 2B, it is assumed that the scan time corresponding to the target backlight partition is determined to be t here.
The display apparatus 100 may then divide the scan time t into a plurality of scan periods, for example, t1 to t4 of fig. 2B, according to the number of sub-display sections.
Next, the display apparatus 100 may determine a target scan period (e.g., t 1) corresponding to the target sub-display section 1022f among the plurality of scan periods t1 to t4 such that the display apparatus 100 follows the target gray-scale value g of the target sub-display section 1022f within the target scan period t1 target_1022f The target backlight partition 104f is lit.
Similarly, the display device 100 may determine the scan periods corresponding to the other sub-display sections 1024 f-1028 f of the target display section 102f in the foregoing manner, e.g., corresponding to t 2-t 4, respectively, such that the display device 100 respectively follows the target gray scale values g of the sub-display sections 1024f, 1026f, 1028f within the corresponding scan periods t2, t3, t4 target_1024f 、g target_1026f 、g target_1028f The target backlight partition 104f is lit. That is, the target gray-scale value g of the sub-display section 1024f is set in the scanning period t2 target_1024f The target backlight partition 104f is illuminated and the target gray scale value g of the sub-display partition 1026f is followed during the scan period t3 target_1026f The target backlight partition 104f is lighted up, and the target gray-scale value g of the sub-display partition 1028f is set in accordance with the scanning period t4 target_1028f The target backlight partition 104f is lit.
By the processing of lighting the backlight partition according to the brightness corresponding to the target gray scale value of different sub-display partitions in the sub-scanning period, the situation that the target backlight partition 104f is only lighted by adopting the brightness corresponding to the maximum gray scale value of the target display partition 102f in the whole scanning time t of the target backlight partition 104f is avoided, gray scale transition at a bright and dark juncture can be made as much as possible under the principle of meeting the maximum brightness, sharp change is avoided, and the halation problem is improved.
In some embodiments, if the target gray level g is determined target_1022f When the sub-display partitions are ordered according to the gray scale values, when the scanning time periods corresponding to the target gray scale values are determined, the corresponding scanning time periods can be determined according to the ordering order. For example, the target gray level g target_1022f When calculating, the gray-scale value of the sub-display partition with the sequence number of 1 is used, then the target gray-scale value g is used target_1022f When the corresponding backlight partition is lit, the lighting may be performed in the scan period t 1. It is to be understood that, although there is a one-to-one correspondence between the scanning periods and the target gray scale values, the one-to-one correspondence may not depend on the order of the gray scale values, and therefore, the scanning periods corresponding to the target gray scale values may be determined not according to the order of the gray scale values, but in other manners, so long as the one-to-one correspondence between the scanning periods and the target gray scale values is ensured.
It can be seen that, for any selected target display section and target backlight section, the brightness and scanning period corresponding to each target gray scale value can be determined in the above manner.
After the brightness and the scanning period of all the display partitions of the display panel 102 and all the backlight partitions of the corresponding backlight module 104 are determined, the display device 100 may light the corresponding backlight partitions according to the corresponding brightness in the corresponding scanning period, thereby completing the backlight control of the display device 100.
According to the display device 100 provided by the embodiment of the disclosure, dimming of the backlight subareas is optimized in a scanning compensation and algorithm compensation mode, so that the gradual change display effect of the subareas is improved, and the halation problem is well solved.
The disclosed embodiments also provide a control method 200 of the display device 100 that improves the halation problem. Fig. 3 shows a flow diagram of an exemplary method 200 provided by an embodiment of the present disclosure. The method 200 may be implemented by the display device 100 and may include the following steps.
In step 202, the display device 100 may determine a target display partition of the plurality of display partitions.
In step 204, the display device 100 may divide the target display partition into a plurality of sub-display partitions.
In step 206, the display device 100 may determine the target gray-scale value of each sub-display section according to the gray-scale value corresponding to each sub-display section.
In some embodiments, determining the target gray-scale value of each sub-display section according to the gray-scale value corresponding to each sub-display section includes: determining a target sub-display section of the plurality of sub-display sections; determining gray scale values of all pixel points in the target sub-display partition based on the target sub-display partition; and determining a target gray scale value of the target sub-display partition according to the maximum gray scale value of the gray scale values of all pixel points in the target sub-display partition.
In some embodiments, determining the target gray-scale value of the target sub-display section according to the maximum gray-scale value of the gray-scale values of all pixel points in the target sub-display section includes: and determining the maximum gray scale value in the gray scale values of all pixel points in the target sub-display partition as the target gray scale value of the target sub-display partition.
In some embodiments, determining the target gray-scale value of the target sub-display section according to the maximum gray-scale value of the gray-scale values of all pixel points in the target sub-display section includes: determining whether brightness distribution of a plurality of display partitions adjacent to the target display partition satisfies a brightness distribution dispersion condition; in response to determining that brightness of a plurality of display partitions adjacent to the target display partition meets brightness distribution dispersion conditions, calculating target gray-scale values of the target sub-display partition according to a first gray-scale compensation algorithm by combining maximum gray-scale values of all pixel points in the target sub-display partition according to gray-scale values of a plurality of display partitions adjacent to the target display partition; or in response to determining that the brightness of a plurality of display partitions adjacent to the target display partition does not meet the brightness distribution dispersion condition, calculating the target gray-scale value of the target sub-display partition according to a second gray-scale compensation algorithm by combining the maximum gray-scale value of the gray-scale values of all pixel points in the target sub-display partition according to the gray-scale values of the plurality of display partitions adjacent to the target display partition.
In some embodiments, determining whether the luminance distribution of a plurality of display sections adjacent to the target display section satisfies a luminance distribution dispersion condition includes: determining whether the difference value between the maximum value and the minimum value of the maximum gray scale values of all display subareas adjacent to the target display subarea is larger than a gray scale difference threshold value; in response to a difference between a maximum value and a minimum value of maximum gray scale values of each display partition adjacent to the target display partition being greater than a gray scale difference threshold, determining whether a ratio of an area of a display partition having the maximum value to a total area of a plurality of display partitions adjacent to the target display partition is less than a ratio threshold; and determining that the luminance distribution of the plurality of display sections adjacent to the target display section satisfies the luminance distribution dispersion condition in response to determining that the proportion of the area of the display section having the maximum value to the total area of the plurality of display sections adjacent to the target display section is smaller than a proportion threshold.
In some embodiments, according to the gray-scale values of a plurality of display partitions adjacent to the target display partition, in combination with the maximum gray-scale value of the gray-scale values of all the pixel points in the target sub-display partition, calculating the target gray-scale value of the target sub-display partition according to a first gray-scale compensation algorithm, including:
Sorting the target display partition and a plurality of sub-display partitions of a plurality of display partitions adjacent to the target display partition according to the maximum gray scale value of the sub-display partitions;
determining the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max And a minimum value g of maximum gray-scale values of all sub-display partitions corresponding to the serial numbers of the target sub-display partitions among a plurality of display partitions adjacent to the target display partition min_max ；
Calculating the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max Maximum gray-scale average g of (2) avg_max The method comprises the steps of carrying out a first treatment on the surface of the And
calculating the target gray scale value of the target sub-display partition according to the following formula:
g target ＝g target_max +g avg_max -g min_max
wherein g target_max And displaying the maximum gray level value in the gray level values of all pixel points in the subarea for the target sub-display.
In some embodiments, according to the gray scale values of the plurality of display partitions adjacent to the target display partition, in combination with the maximum gray scale value of the gray scale values of all the pixel points in the target sub-display partition, calculating the target gray scale value of the target sub-display partition according to a second gray scale compensation algorithm, including:
Sorting the target display partition and a plurality of sub-display partitions of a plurality of display partitions adjacent to the target display partition according to the maximum gray scale value of the sub-display partitions;
determining a plurality of display partitions adjacent to the target display partitionMaximum gray-scale value g of each sub-display section corresponding to the serial number of the target sub-display section i_max ；
Calculating the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max Maximum gray-scale average g of (2) avg_max The method comprises the steps of carrying out a first treatment on the surface of the And
calculating the target gray scale value of the target sub-display partition according to the following formula:
g target ＝g target_max +g avg_max
wherein g target_max And displaying the maximum gray level value in the gray level values of all pixel points in the subarea for the target sub-display.
In step 208, the display apparatus 100 may determine the brightness of the target backlight partition corresponding to the target display partition and the scanning period for lighting the target backlight partition according to the brightness according to the target gray scale value of each of the sub display partitions and the number of the sub display partitions.
In some embodiments, determining, according to the target gray-scale value of each of the sub-display sections and the number of the sub-display sections, the brightness of the target backlight section corresponding to the target display section and the scanning period for lighting the target backlight section according to the brightness includes: determining the scanning time corresponding to the target backlight partition; dividing the scanning time into a plurality of scanning periods according to the number of the sub-display partitions; and determining a target scanning period corresponding to the target sub-display partition in the plurality of scanning periods, so as to light the target backlight partition according to the target gray scale value of the target sub-display partition in the target scanning period.
At step 210, the display apparatus 100 may control the target backlight partition according to the brightness and the scan period.
It should be noted that the foregoing describes some embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Based on the same inventive concept, corresponding to any of the above-described embodiments of method 200, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the method 200 as described in any of the above-described embodiments.
The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.
The storage medium of the foregoing embodiments stores computer instructions for causing the computer to perform the method 200 as described in any of the foregoing embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.
Based on the same inventive concept, the present disclosure also provides a computer program product, corresponding to any of the embodiment methods 200 described above, comprising a computer program. In some embodiments, the computer program is executable by one or more processors to cause the processors to perform the described method 200. Corresponding to the execution bodies corresponding to the steps in the embodiments of the method 200, the processor executing the corresponding step may belong to the corresponding execution body.
The computer program product of the above embodiment is configured to cause a processor to perform the method 200 of any of the above embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present disclosure, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in details for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present disclosure. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present disclosure, and this also accounts for the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform on which the embodiments of the present disclosure are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the embodiments of the disclosure, are intended to be included within the scope of the disclosure.
Claims (13)
1. A control method of a display device, the display device including a display panel and a backlight module, the display panel including a plurality of display partitions, the backlight module including a plurality of backlight partitions, the display partitions corresponding to the backlight partitions, the method comprising:
determining a target display partition of the plurality of display partitions;
dividing the target display partition into a plurality of sub display partitions;
determining a target gray scale value of each sub-display partition according to the gray scale value corresponding to each sub-display partition; the target gray scale value is determined according to the maximum gray scale value in the gray scale values of all pixel points of the sub-display partition;
determining the brightness of a target backlight partition corresponding to each sub-display partition and the scanning time period for lighting the target backlight partition according to the brightness according to the target gray scale value of each sub-display partition and the number of the sub-display partitions, wherein the brightness and the scanning time period are in one-to-one correspondence, the number of the brightness and the scanning time period is equal to the number of the sub-display partitions, and the scanning time period corresponding to the target backlight partition is obtained by dividing the scanning time according to the number; and
And controlling the target backlight partition according to the brightness and the scanning period.
2. The method of claim 1, wherein determining a target gray-scale value for each of the sub-display sections from the corresponding gray-scale value for each of the sub-display sections comprises:
determining a target sub-display section of the plurality of sub-display sections;
determining gray scale values of all pixel points in the target sub-display partition based on the target sub-display partition; and
and determining the target gray scale value of the target sub-display partition according to the maximum gray scale value of the gray scale values of all pixel points in the target sub-display partition.
3. The method of claim 2, wherein determining the brightness of the target backlight partition corresponding to the target display partition and the scan period for lighting the target backlight partition according to the brightness according to the target gray scale value of each of the sub display partitions and the number of the sub display partitions comprises:
determining the scanning time corresponding to the target backlight partition;
dividing the scanning time into a plurality of scanning periods according to the number of the sub-display partitions; and
and determining a target scanning period corresponding to the target sub-display partition in the plurality of scanning periods, so as to lighten the target backlight partition according to the target gray scale value of the target sub-display partition in the target scanning period.
4. The method of claim 2, wherein determining the target gray-scale value for the target sub-display section based on the maximum gray-scale value of the gray-scale values for all pixels in the target sub-display section comprises:
and determining the maximum gray scale value in the gray scale values of all pixel points in the target sub-display partition as the target gray scale value of the target sub-display partition.
5. The method of claim 2, wherein determining the target gray-scale value for the target sub-display section based on the maximum gray-scale value of the gray-scale values for all pixels in the target sub-display section comprises:
determining whether brightness distribution of a plurality of display partitions adjacent to the target display partition satisfies a brightness distribution dispersion condition;
in response to determining that brightness of a plurality of display partitions adjacent to the target display partition meets brightness distribution dispersion conditions, calculating target gray-scale values of the target sub-display partition according to a first gray-scale compensation algorithm by combining maximum gray-scale values of all pixel points in the target sub-display partition according to gray-scale values of a plurality of display partitions adjacent to the target display partition; or alternatively
And in response to determining that the brightness of a plurality of display partitions adjacent to the target display partition does not meet the brightness distribution dispersion condition, calculating target gray-scale values of the target sub-display partition according to a second gray-scale compensation algorithm by combining the maximum gray-scale value of the gray-scale values of all pixel points in the target sub-display partition according to the gray-scale values of the plurality of display partitions adjacent to the target display partition.
6. The method of claim 5, wherein determining whether the luminance distribution of a plurality of display sections adjacent to the target display section satisfies a luminance distribution dispersion condition comprises:
determining whether the difference value between the maximum value and the minimum value of the maximum gray scale values of all display subareas adjacent to the target display subarea is larger than a gray scale difference threshold value;
in response to a difference between a maximum value and a minimum value of maximum gray scale values of each display partition adjacent to the target display partition being greater than a gray scale difference threshold, determining whether a ratio of an area of a display partition having the maximum value to a total area of a plurality of display partitions adjacent to the target display partition is less than a ratio threshold; and
in response to determining that a ratio of an area of a display section having the maximum value to a total area of a plurality of display sections adjacent to the target display section is less than a ratio threshold, it is determined that a luminance distribution of the plurality of display sections adjacent to the target display section satisfies a luminance distribution dispersion condition.
7. The method of claim 5, wherein calculating the target gray-scale value of the target sub-display section according to the first gray-scale compensation algorithm in combination with the maximum gray-scale value of the gray-scale values of all pixels in the target sub-display section according to the gray-scale values of the plurality of display sections adjacent to the target display section, comprises:
Sorting the target display partition and a plurality of sub-display partitions of a plurality of display partitions adjacent to the target display partition according to the maximum gray scale value of the sub-display partitions;
determining the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max And a minimum value g of maximum gray-scale values of all sub-display partitions corresponding to the serial numbers of the target sub-display partitions among a plurality of display partitions adjacent to the target display partition min_max ；
Calculating the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max Maximum gray-scale average g of (2) avg_max The method comprises the steps of carrying out a first treatment on the surface of the And
calculating the target gray scale value of the target sub-display partition according to the following formula:
g target ＝g target_max +g avg_max -g min_max
wherein g target_max And displaying the maximum gray level value in the gray level values of all pixel points in the subarea for the target sub-display.
8. The method of claim 5, wherein calculating the target gray-scale value of the target sub-display section according to the second gray-scale compensation algorithm in combination with the maximum gray-scale value of the gray-scale values of all the pixel points in the target sub-display section according to the gray-scale values of the plurality of display sections adjacent to the target display section, comprises:
Sorting the target display partition and a plurality of sub-display partitions of a plurality of display partitions adjacent to the target display partition according to the maximum gray scale value of the sub-display partitions;
determining the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max ；
Calculating the maximum gray-scale value g of each sub-display partition corresponding to the serial number of the target sub-display partition in a plurality of display partitions adjacent to the target display partition i_max Maximum gray-scale average g of (2) avg_max The method comprises the steps of carrying out a first treatment on the surface of the And
calculating the target gray scale value of the target sub-display partition according to the following formula:
g target ＝g target_max +g avg_max
wherein g target_max And displaying the maximum gray level value in the gray level values of all pixel points in the subarea for the target sub-display.
9. A display device, comprising:
the display device comprises a display panel and a backlight module, wherein the display panel comprises a plurality of display partitions, the backlight module comprises a plurality of backlight partitions, and the display partitions correspond to the backlight partitions;
one or more processors, memory; and
one or more programs;
wherein the one or more programs are stored in the memory and executed by the one or more processors, the programs comprising instructions for performing the method of any of claims 1-8.
10. The display device of claim 9, wherein the backlight module comprises light emitting units arranged in an array, and each backlight partition comprises a plurality of the light emitting units.
11. The display device of claim 10, wherein the light emitting unit is a miniLED or a microLED.
12. A non-transitory computer readable storage medium containing a computer program, which when executed by one or more processors causes the processors to perform the method of any of claims 1-8.
13. A computer program product comprising computer program instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-8.
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