CN114974135A - Backlight control method and device of display equipment, storage medium and intelligent interactive panel - Google Patents
Backlight control method and device of display equipment, storage medium and intelligent interactive panel Download PDFInfo
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- 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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- 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
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Abstract
The invention discloses a backlight control method and device of display equipment, a storage medium and an intelligent interactive panel. Wherein a display area of the display device is divided into a plurality of partitions, and a backlight luminance of each partition is individually controlled by a backlight driving means, the method comprising: acquiring a target partition in display equipment, wherein the target partition is a partition in which a displayed image changes; acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of display equipment; and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time. The invention solves the technical problem that flicker may occur when backlight is adjusted in the prior art.
Description
Technical Field
The invention relates to the field of display equipment, in particular to a backlight control method and device of the display equipment, a storage medium and an intelligent interactive panel.
Background
Currently, when controlling the backlight of a display screen, a display area of the display screen is generally divided into a plurality of areas, each area is taken as a partition, and then backlight adjustment is performed on each partition, for example, Local dimming (Local dimming) technology may be used to adjust the backlight of a certain partition, when adjusting the backlight of a certain partition, the backlight brightness value of the corresponding partition is adjusted by extracting the average brightness value of a video image, and when setting the backlight brightness, Vertical synchronization (Vsync) is often used to adjust the partition backlight while the video data is changed. For example, fig. 1 is a schematic diagram of a partition for local dimming in the prior art, and as shown in fig. 1, taking the adjustment of the backlight brightness of the a partition as an example, when the display data of the a partition changes, the backlight brightness of the a partition needs to be adjusted, for example, if the a partition displays a 60Hz picture, the update using Vsync is also a 60Hz picture, and the update frequency for updating the backlight of the a partition is also 60 Hz. Fig. 2 is a graph of variation of the luminance value of the zoned backlight for local dimming in the prior art, as shown in fig. 2, when the update amplitude of the backlight luminance value of the a zone is large, the backlight luminance value of the zoned is caused to rise to the target value once, and thus the visual flicker is caused.
No effective solution has been proposed to address the above-mentioned problem of flicker that may occur when adjusting the backlight.
Disclosure of Invention
The embodiment of the invention provides a backlight control method and device of display equipment, a storage medium and an intelligent interactive panel, which are used for at least solving the technical problem that flicker is likely to occur when backlight is adjusted in the prior art.
According to an aspect of embodiments of the present invention, there is provided a backlight control method of a display device, a display area of the display device being divided into a plurality of partitions, backlight luminance of each partition being individually controlled by a backlight driving means, the backlight control method of the display device including: acquiring a target partition in display equipment, wherein the target partition is a partition in which a displayed image changes; acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of the display device; and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time.
According to another aspect of the embodiments of the present invention, there is also provided a backlight control apparatus of a display device, a display area of the display device being divided into a plurality of partitions, backlight luminance of each partition being individually controlled by a backlight driving apparatus, the backlight control apparatus of the display device including: the device comprises a first acquisition unit, a second acquisition unit and a display unit, wherein the first acquisition unit is used for acquiring a target partition in the display device, and the target partition is a partition in which a displayed image changes; the second acquisition unit is used for acquiring single adjustment amplitude and determining the backlight brightness adjustment frequency to be integral multiple of the image signal adjustment frequency of the display equipment; and the adjusting unit is used for sending a dimming signal according to the backlight brightness adjusting frequency so as to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium storing a plurality of instructions adapted to be loaded by a processor and to execute the backlight control method of the display device of the embodiments of the present invention.
According to another aspect of the embodiments of the present invention, there is also provided an intelligent interactive tablet, including: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the backlight control method of the display device of the embodiment of the present invention.
In the embodiment of the invention, a target partition in display equipment is obtained, wherein the target partition is a partition in which a displayed image changes; acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of display equipment; and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time. That is to say, the present application realizes multiple adjustments of the backlight brightness of the target partition according to the single adjustment amplitude within one vertical synchronization pulse time by obtaining the target partition in the display device and the single adjustment amplitude of the target partition, so that the amplitude for adjusting the backlight brightness of the target partition at each time is smaller, and the frequency is faster, thereby avoiding the problem of visual flicker when adjusting the backlight brightness value of the partition, solving the technical problem in the prior art that flicker may occur when adjusting the backlight, and achieving the technical effect of better displaying the picture when adjusting the backlight brightness value of the partition.
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The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a sectional schematic diagram of a prior art local dimming implementation;
fig. 2 is a graph illustrating a variation of a luminance value of a zoned backlight for local dimming in the prior art;
fig. 3 is a flowchart of a backlight control method of a display device according to an embodiment of the present invention;
fig. 4 is a graph showing a variation of a luminance value of a partitioned backlight for local dimming according to an embodiment of the present invention;
fig. 5 is a schematic view of an application scenario of a backlight control method of a display device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a backlight control apparatus of a display device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an intelligent interactive tablet according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a backlight control method for a display device, it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that herein.
Fig. 3 is a flowchart of a backlight control method of a display device according to an embodiment of the present invention. As shown in fig. 3, the method may include the steps of:
step S302, a target partition in the display device is obtained, wherein the target partition is a partition where the displayed image changes.
In the technical solution provided by step S302 of the present invention, the display image of the display device may be divided into a plurality of regions, each region is determined as a partition, and then a partition where the displayed image changes is determined as a target partition among the plurality of partitions.
In this embodiment, the target partition in the display device may be acquired by sequentially scanning a plurality of partitions in the display image of the display device to determine the partition in which the displayed image changes.
Step S304, obtaining the single adjustment amplitude, and determining the backlight brightness adjustment frequency to be an integral multiple of the image signal adjustment frequency of the display device.
In the technical solution provided in step S304 of the present invention, since a flicker phenomenon occurs when the backlight of the display device is adjusted in the prior art, in order to avoid this phenomenon, after the target partition in the display device is obtained, a single adjustment amplitude, which is an amplitude of each adjustment when the backlight of the display device is adjusted for multiple times, may be obtained, so that a flicker phenomenon caused by an excessively large change in the backlight adjustment value may be avoided by adjusting the backlight of the target partition in the display device for multiple times.
In the above embodiment, after obtaining the single adjustment amplitude, the backlight brightness adjustment frequency may be determined to be an integral multiple of the image signal adjustment frequency of the display device, so that the amplitude value of the backlight may be made smaller each time and the frequency of the backlight may be made faster each time within a specified Vsync time, thereby avoiding a phenomenon that the display device displays an image and flickers when the backlight of the target partition is adjusted, and enabling the display device to better display the image.
For example, fig. 2 is a graph showing a variation of a luminance value of a partitioned backlight in a local dimming manner in the prior art, as shown in fig. 2, when a backlight of a display device is adjusted, the luminance value of the partitioned backlight is directly adjusted from a to B once within a Vsync time, at this time, a change amount of the luminance value of the backlight is k once, and a change amount of the luminance value of the backlight is t once, because a value of k is large, when the display device displays an image, a phenomenon of flicker occurs. In the present application, the backlight brightness value of the sub-area is adjusted several times to avoid the flicker phenomenon. Fig. 4 is a graph showing a variation of the luminance value of the partitioned backlight according to the embodiment of the present invention, as shown in fig. 4, in the case of adjusting the backlight luminance values of the partitions from a ' to B ' within one Vsync period, the adjustment is performed a plurality of times, where the adjustment time is t ', the variation amount of the backlight luminance values of each adjustment is k ', and compared with the adjustment in the prior art, the adjustment is performed n times (where n is 1, 2, 3, …) and the adjustment width is changed from k to k ' (where k is k/n), that is, the adjustment is performed a plurality of times, the amplitude value of the adjustment backlight can be made smaller, and the frequency of the adjustment backlight becomes faster, therefore, the technical problem that flicker occurs when the backlight of the display equipment in the prior art is adjusted is solved.
Step S306, sending a dimming signal according to the backlight brightness adjustment frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjustment amplitude each time.
In the technical solution provided in step S306 of the present invention, after obtaining the single adjustment amplitude and determining that the backlight brightness adjustment frequency is an integer multiple of the image signal adjustment frequency of the display device, a dimming signal may be sent according to the backlight brightness adjustment frequency, where the dimming signal may be used by the display device to adjust the backlight brightness value of the target partition to the target value, and in the process that the display device adjusts the backlight brightness value of the target partition to the target value, the display device may adjust the backlight brightness of the target partition to the target value by multiple times and each time according to the single adjustment amplitude.
In the present application, the backlight brightness values of the partitions may be adjusted to be smaller, and the method for adjusting the backlight brightness values of the partitions to be smaller may be the same as the method for adjusting the backlight brightness values of the partitions to be larger.
Acquiring a target partition in the display device through the steps S302 to S306, wherein the target partition is a partition where a displayed image changes; acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of display equipment; and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time. That is to say, in the embodiment, by obtaining the target partition in the display device and the single adjustment amplitude for the target partition, the backlight brightness of the target partition is adjusted for multiple times within one vertical synchronization pulse time according to the single adjustment amplitude, so that the amplitude for adjusting the backlight brightness of the target partition every time is smaller, and the frequency is faster, thereby avoiding the problem of visual flicker when adjusting the backlight brightness value of the partition, solving the technical problem in the prior art that flicker may occur when adjusting the backlight, and achieving the technical effect of better displaying the picture when adjusting the backlight brightness value of the partition.
The above method of this example is further illustrated below.
As an alternative implementation, the step S304 of obtaining the single adjustment amplitude and determining the backlight brightness adjustment frequency to be an integer multiple of the image signal adjustment frequency of the display device includes: determining a preset unit adjustment amplitude as a single adjustment amplitude; acquiring the total adjustment amplitude of the target partition, and determining corresponding sub-adjustment amplitudes in each adjustment period according to the total adjustment amplitude, wherein the adjustment period is the adjustment period of the image signal; and determining the ratio of the sub-adjustment amplitude to the single adjustment amplitude to be integer times.
In this embodiment, when obtaining the single adjustment amplitude and determining that the backlight brightness adjustment frequency is an integral multiple of the image signal adjustment frequency of the display device, a unit adjustment amplitude may be preset first, and then the preset unit adjustment amplitude is determined as the single adjustment amplitude, where the single adjustment amplitude is an amplitude of each adjustment when the backlight of the display device is adjusted for multiple times. After the total adjustment amplitude of the target partition is obtained, the ratio of the total adjustment amplitude to the total adjustment period can be determined as a corresponding sub-adjustment amplitude in each adjustment period, then the ratio of the sub-adjustment amplitude to the single adjustment amplitude is determined, when the ratio is an integer, the backlight of the target partition can be adjusted for multiple times according to the single adjustment amplitude, if the ratio is not an integer, a unit adjustment amplitude needs to be reset, and the phenomenon that flicker occurs when the display device displays images due to different adjustment amplitudes of the target partition at each time is avoided.
As an alternative embodiment, before acquiring the single adjustment amplitude and determining that the backlight brightness adjustment frequency is an integer multiple of the image signal adjustment frequency of the display device in step S304, the method further includes: acquiring the total adjustment amplitude of the target partition; comparing the total adjustment amplitude with a preset value; determining that the backlight brightness adjustment frequency is the same as the image signal adjustment frequency of the display device under the condition that the total adjustment amplitude is smaller than the preset value; and under the condition that the total adjusting amplitude is larger than or equal to the preset value, acquiring single adjusting amplitude, and determining the backlight brightness adjusting frequency to be integral multiple of the image signal adjusting frequency of the display equipment.
In this embodiment, before obtaining the single adjustment amplitude and determining that the backlight brightness adjustment frequency is an integral multiple of the image signal adjustment frequency of the display device, the total adjustment amplitude of the target partition may be obtained first, and then the total adjustment amplitude is compared with a predetermined preset value, where the predetermined preset value is an adjustment amplitude threshold value that is set in advance for adjusting the backlight brightness of the target partition, and the value is a limit of whether the display device flickers when displaying an image.
In the above embodiment, if the total adjustment amplitude is smaller than the preset value, it indicates that no flicker phenomenon occurs when the backlight of the target partition is adjusted once at this time, so that it may be determined that the backlight brightness adjustment frequency is the same as the image signal adjustment frequency of the display device; if the total adjustment amplitude is greater than or equal to the preset value, the phenomenon of flicker can occur when the backlight of the target partition is adjusted once at this time, and therefore, the target partition needs to be adjusted for multiple times, so that the step of obtaining the single adjustment amplitude and determining the backlight brightness adjustment frequency to be the integral multiple of the image signal adjustment frequency of the display device can be performed, the phenomenon that the display device can flicker when the backlight of the target partition is adjusted is avoided, and the display device can better display the image.
As an optional implementation manner, in the case that the total adjustment amplitude is smaller than the preset value, the method further includes: obtaining a single adjustment amplitude, wherein the step of obtaining the single adjustment amplitude comprises the following steps: acquiring preset backlight brightness adjusting time; determining the adjusting times according to the preset backlight brightness adjusting time and the preset backlight brightness adjusting frequency; and determining the ratio of the total adjustment amplitude to the adjustment times as the single adjustment amplitude.
In this embodiment, when the total adjustment amplitude is smaller than the preset value, and a single adjustment amplitude is obtained, a preset backlight brightness adjustment time may be obtained first, where the backlight brightness adjustment time may be the total adjustment time for adjusting the backlight of the target partition, and then a ratio between the preset backlight brightness adjustment time and the backlight brightness adjustment frequency may be determined as an adjustment frequency, which is the total adjustment frequency for adjusting the backlight of the target partition, and after the adjustment frequency for adjusting the backlight of the target partition is determined, a ratio between the total adjustment amplitude for adjusting the backlight of the target partition and the adjustment frequency is determined as the single adjustment amplitude, so as to achieve the purpose of adjusting the backlight of the target partition for multiple times according to the single adjustment amplitude.
For example, if the preset backlight brightness adjustment time for adjusting the backlight of the target partition is t, the total adjustment range for adjusting the backlight of the target partition is k, and the backlight brightness adjustment frequency is m, the adjustment time n is t/m, and the single adjustment range k' is k/n, where n is 1, 2, 3, and ….
As an optional implementation, obtaining the total adjustment amplitude of the target partition includes: acquiring a first average brightness of pixels in a target partition at the current moment; acquiring a second average brightness of pixels in the target partition at the previous moment; and determining the difference between the first average brightness and the second average brightness as the total adjustment amplitude.
In this embodiment, when obtaining the total adjustment amplitude of the target partition, first obtaining a first average brightness of pixels in the target partition at the current time, where the first average brightness reflects a backlight brightness value of the target partition at the current time, and then obtaining a second average brightness of the pixels in the target partition at the previous time, where the second average brightness reflects a backlight brightness value of the target partition at the previous time.
Optionally, in this embodiment, the first average luminance may be greater than the second average luminance, may also be smaller than the second average luminance, or may also be the same as the second average luminance, so when the first average luminance is greater than the second average luminance, adjusting the backlight of the target partition is to turn on the backlight of the target partition; when the first average brightness is smaller than the second average brightness, adjusting the backlight of the target subarea, namely dimming the backlight of the target subarea; and under the condition that the first average brightness is the same as the second average brightness, the backlight of the target partition is not adjusted.
As an alternative embodiment, in the case that the number of times of adjustment is multiple, sending a synchronization signal according to the number of times of adjustment to adjust the brightness of the target backlight partition includes: and controlling the total adjustment amplitude of 1/N of the brightness change of the target backlight partition every time the synchronous signal is sent, wherein the adjustment times are N times, N is an integer greater than 1, and the adjustment amplitude is 1/N of the total adjustment amplitude.
In this embodiment, when the number of times of adjustment is multiple, a synchronization signal may be sent according to the number of times of adjustment to adjust the brightness of the target backlight partition, and since one synchronization signal (may also be referred to as a vertical synchronization pulse signal) is required each time the backlight of the target partition is adjusted, after one adjustment of the backlight of the target partition is changed to N times of adjustment, each time the synchronization signal is sent, a 1/N ratio value of the total adjustment amplitude of the brightness change of the target backlight partition may be controlled, where N may be used to indicate the number of times of adjustment of the backlight of the target partition, N is an integer greater than 1, and the adjustment amplitude may be 1/N of the total adjustment amplitude. In this embodiment, by increasing the number of times of the synchronization signal, the purpose of updating the backlight brightness values of the target partition at the same time is achieved, so that the problem that when the backlight of the target partition is adjusted, a display image of the display device flickers due to a slow updating frequency of the backlight brightness values of the target partition is avoided, and the display device can better display the image.
As an alternative embodiment, the controlling the total adjustment amplitude of the luminance change 1/N of the target backlight partition every time the synchronization signal is transmitted includes: acquiring a sub-adjustment amplitude and an adjustment frequency, wherein the product of the sub-adjustment amplitude and the unit adjustment time is a total adjustment amplitude of 1/N, and the unit adjustment time is determined according to the adjustment frequency; and adjusting the brightness of the target backlight partition by the sub-adjustment amplitude in each unit time.
In this embodiment, when the total adjustment range of the luminance variation 1/N of the target backlight section is controlled every time the synchronization signal is transmitted, the adjustment frequency may be obtained first, the unit adjustment time for the target partition may be determined based on the adjustment frequency, then obtaining the corresponding sub-adjustment amplitude in each adjustment period for adjusting the backlight of the target partition, and the product between the sub-adjustment amplitude and the unit adjustment time is determined as the total adjustment amplitude of 1/N, namely the 1/N proportion value of the total adjustment amplitude, this makes it possible to adjust the brightness of the target backlight partition by the sub-adjustment width per unit adjustment time, that is, to control the total adjustment width of the brightness variation 1/N of the target backlight partition every time the synchronization signal is transmitted, after the synchronization signal is sent for N times, the brightness adjustment value target value of the target backlight partition can be obtained.
As an alternative embodiment, the adjusting frequency of the backlight brightness is greater than the adjusting frequency of the image signal of the display device, wherein the adjusting frequency of the backlight brightness is determined according to the adjusting times.
In this embodiment, because the visual flicker phenomenon occurs only when the backlight luminance value of the target partition is updated in a large amplitude, that is, when the adjustment frequency of the backlight luminance is greater than the image signal adjustment frequency of the display device, the flicker phenomenon of the display image occurs when the backlight of the target partition is adjusted, the backlight control method of the display device in the application can be used to eliminate the flicker phenomenon of the display image, and if the adjustment frequency of the backlight luminance is less than or equal to the image signal adjustment frequency of the display device, the backlight adjustment using the scheme provided in this embodiment is not needed.
In the above embodiment, the adjustment frequency of the backlight brightness may be determined by the ratio between the total adjustment amplitude and the adjustment times.
The backlight control method of the display device of this embodiment is further described below by specific application scenarios.
Fig. 5 is a schematic view of an application scenario of a backlight control method of a display device according to an embodiment of the present invention. As shown in fig. 5, when a very bright orb moves rapidly on a completely black screen, the backlight for a sector changes from darkest to brightest as the orb enters the sector, and from brightest to darkest as the orb leaves the sector.
In this embodiment, if the backlight adjustment is performed on the partition where the spherical ball passes through by using the method shown in fig. 2, a phenomenon of flickering is likely to occur visually. By adopting the scheme of the embodiment to adjust the backlight of the subarea where the round ball passes through, the backlight brightness of the subarea is adjusted for many times according to the single adjustment amplitude in a vertical synchronization pulse time by obtaining the subarea where the round ball passes through and the single adjustment amplitude of the subarea, so that the amplitude of the backlight brightness of the subarea is adjusted for each time is smaller, the frequency is faster, thus, the flickering phenomenon of the backlight of the subarea when the round ball enters the subarea and is adjusted from darkest to brightest can be avoided, and the flickering phenomenon of the backlight of the subarea when the round ball leaves the subarea and is adjusted from brightest to darkest can also be avoided, therefore, the problem of visual flicker when the backlight brightness value of the subareas is adjusted is solved, and the aims of displaying that the picture is smoother and has no flicker phenomenon when the ball passes through the full black screen are fulfilled.
In a related art, when a relationship of a ═ N × B (where N is an integer greater than 0) exists between a scanning frequency a of a backlight dimming signal and a scanning frequency B of an image signal of a liquid crystal display panel, a phenomenon that a display image flickers may occur, and therefore, the related art prevents the phenomenon that the backlight flickers with respect to a screen scan by satisfying a ≠ N × B between the scanning frequency a of the backlight dimming signal and the scanning frequency B of the image signal of the liquid crystal display panel, that is, the related art uses a method of asynchronous scanning of the backlight scan and the image signal to prevent the phenomenon that the backlight flickers with respect to the screen scan.
In another related technique, the luminance value of the backlight source changes monotonically when N consecutive frames of images starting from an image to be displayed are displayed in the backlight partition, thereby avoiding the backlight source flicker phenomenon occurring when the backlight source state is switched many times, for example, when the backlight value required by an a frame is x, and the backlight value of the next B frame is y, y is x + k1, the next C frame is x + k2, the next D frame is x + k3, …, and the last time is x + kn, that is, the related technique uses the time of the next frame to perform gradual change of the value, that is, the backlight source flicker phenomenon occurring when the backlight source state is switched many times is avoided by adopting the method of delaying processing and dividing the value in the ideal value time.
The backlight control method of the display device achieves multiple adjustment of the backlight brightness of the target partition according to the single adjustment amplitude within one vertical synchronization pulse time by obtaining the target partition and the single adjustment amplitude of the target partition in the display device, so that the amplitude of the adjustment of the backlight brightness of the target partition is smaller and the frequency of the adjustment of the backlight brightness of the target partition is faster, the problem of visual flicker sense during adjustment of the backlight brightness value of the partition can be avoided, the technical problem that flicker may occur during backlight adjustment in the prior art is solved, and the technical effect of better displaying a picture during adjustment of the backlight brightness value of the partition is achieved.
Example 2
According to the embodiment of the invention, the backlight control device of the display equipment is also provided. It should be noted that the backlight control device of the display device can be used to execute the backlight control method of the display device in embodiment 1.
Fig. 6 is a schematic diagram of a backlight control apparatus of a display device according to an embodiment of the present invention. As shown in fig. 6, the backlight control device 60 of the display apparatus may include: a first acquisition unit 61, a second acquisition unit 62 and an adjustment unit 63.
A first acquiring unit 61, configured to acquire a target partition in the display device, where the target partition is a partition where a displayed image changes.
And a second obtaining unit 62, configured to obtain the single adjustment amplitude, and determine the backlight brightness adjustment frequency to be an integer multiple of the image signal adjustment frequency of the display device.
And an adjusting unit 63, configured to send a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to a single adjustment amplitude each time.
Alternatively, the display area of the display device in this embodiment is divided into a plurality of partitions, and the backlight luminance of each partition is individually controlled by the backlight driving means.
As an alternative embodiment, the second obtaining unit 62 includes: the first determining subunit is used for determining that the preset unit adjustment amplitude is a single adjustment amplitude; the first obtaining subunit is configured to obtain a total adjustment amplitude of the target partition, and determine a corresponding sub-adjustment amplitude in each adjustment period according to the total adjustment amplitude, where the adjustment period is an adjustment period of the image signal; and the second determining subunit is used for determining that the ratio of the sub-adjustment amplitude to the single adjustment amplitude is an integral multiple.
As an alternative embodiment, the backlight control apparatus 60 of the display device may further include: a third obtaining unit, configured to obtain a total adjustment amplitude of the target partition; the comparison unit is used for comparing the total adjustment amplitude with a preset value; a determining unit for determining that the backlight brightness adjustment frequency is the same as the image signal adjustment frequency of the display device when the total adjustment amplitude is less than a preset value; and the processing unit is used for acquiring the single adjustment amplitude and determining the backlight brightness adjustment frequency to be an integral multiple of the image signal adjustment frequency of the display equipment under the condition that the total adjustment amplitude is greater than or equal to the preset value.
As an optional implementation manner, in the case that the total adjustment amplitude is smaller than the preset value, the second obtaining unit 62 includes: the second acquisition subunit is used for acquiring preset backlight brightness adjustment time; a third determining subunit, configured to determine an adjustment number according to a preset backlight brightness adjustment time and a preset backlight brightness adjustment frequency; and the fourth determining subunit is used for determining that the ratio of the total adjustment amplitude to the adjustment times is the single adjustment amplitude.
As an optional implementation, the first obtaining subunit includes: the first acquisition module is used for acquiring the first average brightness of the pixels in the target partition at the current moment; the second acquisition module is used for acquiring a second average brightness of the pixels in the target partition at the previous moment; and the determining module is used for determining the difference between the first average brightness and the second average brightness as the total adjusting amplitude.
As an optional implementation, the adjusting unit 63 further includes: and the adjusting subunit is used for sending a synchronous signal according to the adjusting times to adjust the brightness of the target backlight partition under the condition that the adjusting times are multiple. The adjustment subunit includes: and the control module is used for controlling the total adjustment amplitude of 1/N of the brightness change of the target backlight partition every time the synchronous signal is sent, wherein the adjustment times are N times, N is an integer greater than 1, and the adjustment amplitude is 1/N of the total adjustment amplitude.
As an alternative embodiment, the control module comprises: the acquisition submodule is used for acquiring the sub-adjustment amplitude and the adjustment frequency, wherein the product of the sub-adjustment amplitude and the unit adjustment time is 1/N of the total adjustment amplitude, and the unit adjustment time is determined according to the adjustment frequency; and the adjusting submodule is used for adjusting the brightness of the target backlight partition according to the sub-adjustment amplitude in each unit time.
As an alternative embodiment, the adjusting frequency of the backlight brightness of the backlight control device 60 of the display device is greater than the image signal adjusting frequency of the display device, wherein the adjusting frequency of the backlight brightness is determined according to the adjusting times.
Example 3
There is also provided, in accordance with an embodiment of the present invention, a computer-readable storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to carry out the method steps of any one of embodiment 1.
In an embodiment of the present application, a storage medium stores a plurality of instructions, so that a processor may load and execute the method in any one of embodiments 1 to obtain a target partition in a display device, where the target partition is a partition where a displayed image changes; acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of display equipment; and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time. According to the scheme, the backlight brightness of the target partition is adjusted for multiple times according to the single adjustment amplitude in the vertical synchronization pulse time by obtaining the target partition and the single adjustment amplitude of the target partition, so that the amplitude for adjusting the backlight brightness of the target partition every time is smaller, the frequency is faster, the problem of visual flicker sense when the backlight brightness value of the partition is adjusted can be avoided, the technical problem that flicker may occur when backlight is adjusted in the prior art is solved, and the technical effect of better displaying pictures when the backlight brightness value of the partition is adjusted is achieved.
Example 4
According to an embodiment of the present invention, there is also provided an intelligent interactive tablet, including: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method steps of any of the embodiment 1.
Fig. 7 is a schematic structural diagram of an intelligent interaction tablet according to an embodiment of the present invention, where the intelligent interaction tablet includes the interaction device main body and the touch frame, and as shown in fig. 7, the intelligent interaction tablet 700 may include: at least one processor 701, at least one network interface 704, a user interface 703, memory 705, at least one communication bus 702.
Wherein a communication bus 702 is used to enable connective communication between these components.
The user interface 703 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 703 may also include a standard wired interface and a wireless interface.
The network interface 704 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
The Memory 705 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 705 includes a non-transitory computer-readable medium. The memory 705 may be used to store instructions, programs, code sets, or instruction sets. The memory 705 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like; the storage data area may store data and the like referred to in the above respective method embodiments. The memory 705 may optionally be at least one memory device located remotely from the processor 701. As shown in fig. 7, the memory 705, which is a type of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an operating application of the smart interactive tablet.
In the intelligent interactive tablet 700 shown in fig. 7, the user interface 703 is mainly used to provide an input interface for a user to obtain data input by the user; and the processor 701 may be configured to call an operation application of the smart interactive tablet stored in the memory 705, and specifically perform any one of the operations in embodiment 1.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A backlight control method of a display device, wherein a display area of the display device is divided into a plurality of partitions, and a backlight luminance of each partition is individually controlled by a backlight driving means, the backlight control method of the display device comprising:
acquiring a target partition in the display equipment, wherein the target partition is a partition in which a displayed image changes;
acquiring single adjustment amplitude, and determining backlight brightness adjustment frequency to be integral multiple of image signal adjustment frequency of the display equipment;
and sending a dimming signal according to the backlight brightness adjusting frequency to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time.
2. The method of claim 1, wherein obtaining a single adjustment amplitude and determining a backlight brightness adjustment frequency to be an integer multiple of an image signal adjustment frequency of the display device comprises:
determining a preset unit adjustment amplitude as the single adjustment amplitude;
acquiring the total adjustment amplitude of the target partition, and determining a corresponding sub-adjustment amplitude in each adjustment period according to the total adjustment amplitude, wherein the adjustment period is the adjustment period of the image signal;
determining the ratio of the sub-adjustment amplitude to the single adjustment amplitude to be the integer multiple.
3. The method of claim 1, wherein prior to obtaining a single adjustment magnitude and determining a backlight brightness adjustment frequency to be an integer multiple of an image signal adjustment frequency of the display device, the method further comprises:
acquiring the total adjustment amplitude of the target subarea;
comparing the total adjustment amplitude with a preset value;
determining that the backlight brightness adjustment frequency is the same as the image signal adjustment frequency of the display device under the condition that the total adjustment amplitude is smaller than the preset value;
and under the condition that the total adjusting amplitude is larger than or equal to the preset value, obtaining single adjusting amplitude, and determining the backlight brightness adjusting frequency to be integral multiple of the image signal adjusting frequency of the display equipment.
4. The method of claim 3, wherein in the event that the total adjusted amplitude is less than the preset value, the method further comprises: obtaining a single adjustment amplitude, wherein the step of obtaining the single adjustment amplitude comprises the following steps:
acquiring preset backlight brightness adjusting time;
determining the adjusting times according to the preset backlight brightness adjusting time and the backlight brightness adjusting frequency;
and determining the ratio of the total adjustment amplitude to the adjustment times as the single adjustment amplitude.
5. The method of claim 3, wherein obtaining the total adjusted amplitude for the target partition comprises:
acquiring a first average brightness of pixels in the target partition at the current moment;
acquiring a second average brightness of pixels in the target partition at the previous moment;
and determining the difference between the first average brightness and the second average brightness as the total adjustment amplitude.
6. The method of claim 1, wherein in the case that the number of times of adjustment is multiple, transmitting a synchronization signal according to the number of times of adjustment to adjust the brightness of the target backlight partition comprises:
and controlling the total adjustment amplitude of 1/N of the brightness change of the target backlight partition every time the synchronous signal is sent, wherein the adjustment times are N times, N is an integer greater than 1, and the adjustment amplitude is 1/N of the total adjustment amplitude.
7. The method of claim 1, wherein controlling the total adjustment amplitude of the 1/N luminance change of the target backlight partition every time the synchronization signal is transmitted comprises:
acquiring a sub-adjustment amplitude and an adjustment frequency, wherein the product of the sub-adjustment amplitude and unit adjustment time is the total adjustment amplitude of the 1/N, and the unit adjustment time is determined according to the adjustment frequency;
and adjusting the brightness of the target backlight partition according to the sub-adjustment amplitude in each unit time.
8. The method according to claim 1, wherein the adjustment frequency of the backlight brightness is greater than the image signal adjustment frequency of the display device, wherein the adjustment frequency of the backlight brightness is determined according to the adjustment times.
9. A backlight control apparatus of a display device, wherein a display area of the display device is divided into a plurality of partitions, and a backlight luminance of each partition is individually controlled by a backlight driving apparatus, the backlight control apparatus of the display device comprising:
a first acquisition unit, configured to acquire a target partition in the display device, where the target partition is a partition where a displayed image changes;
the second acquisition unit is used for acquiring single adjustment amplitude and determining the backlight brightness adjustment frequency to be integral multiple of the image signal adjustment frequency of the display equipment;
and the adjusting unit is used for sending a dimming signal according to the backlight brightness adjusting frequency so as to adjust the backlight brightness of the target partition, wherein the backlight brightness of the target partition is adjusted according to the single adjusting amplitude each time.
10. A computer-readable storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to carry out the method steps according to any one of claims 1 to 8.
11. An intelligent interactive tablet, comprising: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method steps of any of claims 1 to 8.
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