CN108022563B - Low-delay liquid crystal display device based on partitioned backlight and driving method thereof - Google Patents
Low-delay liquid crystal display device based on partitioned backlight and driving method thereof Download PDFInfo
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- 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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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
The invention discloses a low-delay liquid crystal display device based on subarea backlight and a driving method thereof, wherein the liquid crystal display device comprises a plurality of subarea backlights distributed in an array, and the driving method comprises the following steps: s1, scanning rows and columns of the active array of the display screen to obtain the image gray scale of the current pixel and obtain an image gray scale matrix; s2, carrying out normalization processing on the image gray-scale matrix according to an electro-optic curve of the display device to obtain a display driving matrix; s3, dividing the display driving matrix into one-to-one corresponding display subareas according to the subarea backlight, and acquiring the positions of the display subareas where the current pixels are located; and S4, performing gray scale distribution statistics of each display partition according to the position of the display partition where the current pixel is located and the display driving matrix, calculating the backlight coefficient when each display partition is lighted according to the gray scale distribution statistics of each display partition, and determining the display partition needing to be lighted according to the position of the current pixel in the display partition and the position of the current display partition in the display driving matrix.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a low-delay liquid crystal display device based on subarea backlight and a driving method thereof.
Background
The development of display terminals gradually transits from simple picture display to video display, and with the rapid development of streaming media in recent years, people have raised higher demands on the video quality of display devices, and video playing has raised new technical requirements on the display devices to reproduce dynamic pictures on the basis of the traditional pursuit of image quality resolution, color reducibility, contrast and the like, wherein one important aspect is to improve motion blur.
Motion blur is primarily determined by the limited response time of the display device from the source, together with the visual tracking and spatial resolution characteristics of the human eye, and in general, responses above 4ms are primarily determined by the response time of the display device. Specifically, for example, in an LCD display device, the response time of IPS/FFS is typically 20-30ms, and the clock frequency of the display is typically 60 Hz. If there is an object moving at high speed in the adjacent frames, the response time of the liquid crystal is much longer than the switching rate between the frames, so that a certain visual trailing phenomenon exists, and motion blur is generated.
At present, the solutions for motion blur mainly include: the high-frequency driving can effectively solve the picture blurring phenomenon and has no bad display defects on picture quality, but the high-frequency driving generates new hardware requirements on the response rate of liquid crystal, the data quantity of a driving IC and the like, and the black insertion technology can improve the motion blurring problem by utilizing the persistence of vision effect of human eyes, but can bring about the problem of darker whole pictures.
Therefore, in view of the above technical problems, it is desirable to provide a low-retardation liquid crystal display device based on a segmented backlight and a driving method thereof.
Disclosure of Invention
To overcome the disadvantages of the prior art, an object of the present invention is to provide a low-retardation liquid crystal display device based on a segmented backlight and a driving method thereof.
In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:
a driving method of a low-retardation liquid crystal display device based on a partitioned backlight, the liquid crystal display device comprising a plurality of partitioned backlights distributed in an array, the driving method comprising:
s1, scanning rows and columns of the active array of the display screen to obtain the image gray scale of the current pixel and obtain an image gray scale matrix;
s2, carrying out normalization processing on the image gray-scale matrix according to an electro-optic curve of the display device to obtain a display driving matrix;
s3, dividing the display driving matrix into one-to-one corresponding display subareas according to the subarea backlight, and acquiring the positions of the display subareas where the current pixels are located;
and S4, performing gray scale distribution statistics of each display partition according to the position of the display partition where the current pixel is located and the display driving matrix, calculating the backlight coefficient when each display partition is lighted according to the gray scale distribution statistics of each display partition, and determining the display partition needing to be lighted according to the position of the current pixel in the display partition and the position of the current display partition in the display driving matrix.
As a further improvement of the present invention, the step S4 includes:
s41, if the current pixel (x, y) is the first pixel of the display partition and the display partition is the first column of the mth row display partition, turning off the m row partition backlight;
s42, if the current pixel (x, y) is the last pixel of the current display partition, calculating the backlight coefficient Blu (m, n) of the display partition where the current pixel is located according to the gray scale distribution of each display partition.
As a further improvement of the present invention, the step S42 further includes:
if the current display partition is the last column of the mth row display partition, lightening partition backlight before K rows of the current display partition;
and if the current pixel (x, y) is the last pixel of the current frame, taking the backlight coefficient of the frame on the display partition as the current backlight coefficient.
As a further improvement of the invention, the "K" value is:
k = Integer (Tup × m/16.7), where Tup is the rising edge response time of the liquid crystal and Integer is the rounding operation.
As a further improvement of the present invention, the method for calculating the backlight coefficient in step S4 includes:
and counting the gray scale characteristic value distribution of the sub-pixels in the current display partition, and calculating the lighting coefficient of each display partition, wherein the gray scale characteristic value comprises the gray scale maximum value and the gray scale average value of the sub-pixels.
As a further improvement of the present invention, the driving method further includes:
acquiring a backlight coefficient of each display partition of the previous frame;
calculating the backlight brightness of the current pixel when the backlight of each display subarea is completely lightened;
and calculating a gray scale compensation signal by combining the display driving matrix of the current frame and outputting the gray scale compensation signal to lighten the display screen.
As a further improvement of the invention, the electro-optic curve in the step S2 is a Gamma curve, and the display driving matrix is indata (x, y, 3) = (gray/2^ N)gammaGray is the image gray scale, and N is the number of bits of the display device.
As a further improvement of the invention, the value of Gamma in the display drive matrix is 2.2.
The technical scheme provided by another embodiment of the invention is as follows:
the liquid crystal display device comprises a backlight unit, a display screen and a driving unit for driving the backlight unit and the display screen, wherein the backlight unit comprises a plurality of subarea backlights distributed in an array, the driving unit comprises a backlight driving unit for lighting the backlight unit and a liquid crystal driving unit for lighting the display screen, and the driving unit drives the liquid crystal display device by the driving method.
As a further improvement of the invention, the backlight unit comprises a plurality of Mini-LED light sources distributed in an array.
According to the characteristic of low-speed response of liquid crystal, the lighting of the current subarea backlight is delayed for a certain time, so that the liquid crystal molecular angle corresponding to any pixel of the subarea backlight is almost deflected to the gray scale voltage corresponding to the pixel when the backlight is lighted, and the response time of a liquid crystal display device is remarkably improved through a black insertion technology;
the high brightness characteristic of the Mini-LED can ensure that enough brightness can be provided even though the backlight is only lighted for a limited time in the current frame, the problem of insufficient brightness of a display device caused by the limitation of the brightness of the backlight source in the traditional black insertion technology is solved, and the unstable characteristic of the Mini-LED area light source in low-current driving is also solved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a driving method of a low-retardation LCD device based on a partitioned backlight according to the present invention.
Fig. 2a is a schematic structural diagram of a liquid crystal display device in embodiment 1 of the present invention, and fig. 2b is a schematic structural diagram of a backlight unit in embodiment 1 of the present invention.
FIG. 3 is a flowchart illustrating a driving method of a low-retardation LCD device in embodiment 2 of the present invention.
FIG. 4 is a schematic diagram of increasing backlight brightness in the driving method of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.
The invention discloses a low-delay liquid crystal display device based on subarea backlight, which comprises a backlight unit, a display screen and a driving unit for driving the backlight unit and the display screen, wherein the backlight unit comprises a plurality of subarea backlights distributed in an array manner, and the driving unit comprises a backlight driving unit for lighting the backlight unit and a liquid crystal driving unit for lighting the display screen.
Correspondingly, referring to fig. 1, the invention also discloses a driving method of a low-retardation liquid crystal display device based on a partitioned backlight, comprising the following steps:
s1, scanning rows and columns of the active array of the display screen to obtain the image gray scale of the current pixel and obtain an image gray scale matrix;
s2, carrying out normalization processing on the image gray-scale matrix according to an electro-optic curve of the display device to obtain a display driving matrix;
s3, dividing the display driving matrix into one-to-one corresponding display subareas according to the subarea backlight, and acquiring the positions of the display subareas where the current pixels are located;
and S4, performing gray scale distribution statistics of each display partition according to the position of the display partition where the current pixel is located and the display driving matrix, calculating the backlight coefficient when each display partition is lighted according to the gray scale distribution statistics of each display partition, and determining the display partition needing to be lighted according to the position of the current pixel in the display partition and the position of the current display partition in the display driving matrix.
Wherein, step S4 includes:
s41, if the current pixel (x, y) is the first pixel of the display partition and the display partition is the first column of the mth row display partition, turning off the m row partition backlight;
s42, if the current pixel (x, y) is the last pixel of the current display partition, calculating the backlight coefficient Blu (m, n) of the display partition where the current pixel is located according to the gray scale distribution of each display partition.
Step S42 further includes:
if the current display partition is the last column of the mth row display partition, lightening partition backlight before K rows of the current display partition;
and if the current pixel (x, y) is the last pixel of the current frame, taking the backlight coefficient of the frame on the display partition as the current backlight coefficient.
The present invention is further illustrated by the following specific examples.
Example 1:
referring to fig. 2a and 2b, the liquid crystal display device in this embodiment includes a backlight unit 10, an array substrate 20, a liquid crystal layer 30, a pixel layer 40, a color filter substrate 50, and a polarizer 60, and further includes a backlight driving unit for lighting the backlight unit 20 and a liquid crystal driving unit for lighting a display (such as the liquid crystal layer 30).
The backlight unit 10 adopts a 2D partition design, and includes a plurality of partition backlights distributed in an array, the number of the horizontal partition backlights and the number of the vertical partition backlights are M and N, the display screens correspond to the partition backlights one to one, and the display screens are correspondingly divided into a plurality of display partitions.
In this embodiment, in the design of the partitioned backlight, a huge amount of small-size Mini-LED arrays are used as the light source, on one hand, the advantage of lightness and thinness is considered, and meanwhile, the high-brightness characteristic of the Mini-LEDs can ensure that the backlight can provide enough brightness even if the backlight is only lighted in the current frame for a limited time, so that the problem of insufficient brightness of the display device caused by the limitation of the brightness of the backlight source in the conventional black insertion technology is avoided, and meanwhile, the unstable characteristic of the Mini-LED area light source in low-current driving (the driving current in the lighting time can be correspondingly increased according to the lighting duty ratio) is also solved.
Example 2:
referring to fig. 3, the driving method of the low-retardation liquid crystal display device based on the segmented backlight in the embodiment specifically includes:
s1, scanning the active array row and column of the display screen to obtain the image gray scale of the current pixel and obtain an image gray scale matrix.
Wherein, the image gray scale is gray (x, y, 3), wherein x belongs to [1, height ], y belongs to [1, width ], height and width are respectively defined as the height and width of the image, and 3 respectively represents three channels of R/G/B.
And S2, carrying out normalization processing on the image gray-scale matrix according to the electro-optic curve EOTF of the display device to obtain a display driving matrix.
Preferably, the electro-optic curve is a Gamma curve, and the display drive matrix is indata (x, y, 3) = (gray/2^ N)gammaIn this embodiment, the gamma value is 2.2, and N is the bit number of the display device, such as 6, 8, 10 bits.
S3, the display drive matrix indata is divided into display partitions corresponding to each other according to the partition backlight, and the position (m, n) of the display partition where the current pixel (x, y) is located is obtained.
And S4, carrying out gray scale distribution statistics HISTM N of each display partition according to the position of the display partition where the current pixel is located and the display driving matrix indata, calculating the backlight coefficient when each display partition is lightened according to the gray scale distribution statistics of each display partition, and determining the display partition needing to be lightened according to the position of the current pixel in the display partition and the position of the current display partition in the display driving matrix.
This step mainly achieves two purposes, one is to calculate the backlight coefficient of each partitioned backlight, and the other is to decide which partitioned backlight to light (i.e. to realize the display of which display partition).
Specifically, step S4 includes:
s41, if the current pixel (x, y) is the first pixel of the display partition and the display partition is the first column of the mth row display partition, namely Blu (m, 1), turning off the m row partition backlight;
s42, if the current pixel (x, y) is the last pixel of the current display partition, calculating the backlight coefficient Blu (M, N) of the display partition where the current pixel is located according to the gray scale distribution statistics HISTM N of each display partition, wherein M belongs to [1, M ], and N belongs to [1, N ].
Wherein, step S42 further includes:
s421, if the current display partition is the last column of the mth row display partition, that is, Blu (m, N), lighting the partition backlight before the K row of the current display partition, that is, the backlight coefficient is Blu (m-K, N), and N =1 … N partition backlight;
s422, if the current pixel (x, y) is the last pixel of the current frame, the backlight coefficient of the frame in the display partition is used as the current backlight coefficient, that is, Blu _ last (m, n) = Blu (m, n) is assigned.
In addition, the method for calculating the backlight coefficient in step S4 is as follows:
and counting the gray scale characteristic value distribution of the sub-pixels in the current display partition, and calculating the lighting coefficient of each display partition, wherein the gray scale characteristic value comprises the gray scale maximum value, the gray scale average value and the like of the sub-pixels, and the method is not particularly limited herein.
In this embodiment, the value of K generally refers to the response time, frame frequency and number of partitions of the liquid crystal, for example, a 60Hz display screen, the display time of one frame is 16.7ms, and the scanning time of the partition backlight of each line is about 16.7/m (ms). Assuming that the rising edge response time of the liquid crystal is Tup, it is usually set that the backlight is turned on after the current display pixel driving IC turns on Tup, and thus the delay K ≈ Integer (Tup × m/16.7), where Integer is rounding operation. Further, K may be set as needed for image quality display.
In addition, the driving method in the present embodiment further includes:
s51, obtaining a backlight coefficient Blu _ last (M, N) of each display partition of the previous frame, wherein M belongs to [1, M ], and N belongs to [1, N ];
s52, calculating the backlight brightness of the current pixel when all the backlight of each display subarea is lighted;
s53, calculating a gray level compensation signal outdata (height, width, 3) by combining the display driving matrix indata (x, y, 3) of the current frame obtained in step S2, and outputting the gray level compensation signal outdata (height, width, 3) to a driving IC (liquid crystal driving unit) to light up the display screen, thereby realizing gray level compensation and improving the display effect.
In principle, for any display sub-area, when the backlight of the current line sub-area is turned off when the first pixel of the m line display sub-area is scanned, the liquid crystal molecules start to gradually deflect to a desired angle under the action of the driving voltage, and the time spent in the period is about Tup. After K lines of retardation, the segmented backlight is turned on, and the liquid crystal molecules are basically deflected to a preset angle, so that the rapid response can be visually realized, and the problems of high retardation and motion blur of the traditional liquid crystal display can be remarkably improved.
The large Mini-LED is used as a luminous source, so that the LED has the advantages of low light mixing distance, narrow frame and high light efficiency. Because a huge Mini-LED array is adopted as a light source, the driving current of the traditional LED is 20mA, and the existence of the huge Mini-LED enables any Mini-LED to be used as a backlight source, the driving current of the Mini-LED is originally less than 20mA, usually only about 1mA, so that the problem of unstable driving is caused.
In terms of driving manner, the backlight coefficient of the current partition can be determined only after the gray scale statistical distribution in the partition is counted in the traditional partition backlight algorithm, so that the backlight of the current partition cannot be lightened in real time at the current frame (the calculation result of the previous frame is usually adopted as the backlight coefficient of the current frame in the strategy), the system delay of one frame is provided, and the backlight synchronization cannot be realized during fast frame switching.
In the invention, by adopting the driving method, in any partition in any frame of picture, the partitioned backlight brightness is lightened after delaying K lines in the frame of picture, namely, the brightness is always subjected to a pure black state and backlight lightening time which are totally closed by a section of backlight, and the reduction of the visual brightness is inevitably brought on the aspect of visual perception of human eyes. In order to solve the above-mentioned problem, that is, to maintain the same visual brightness as the conventional normal continuous lighting backlight, the backlight brightness in the lighting interval may be increased in reverse (that is, the driving current may be increased) according to the duty ratio of actual lighting of the backlight in the driving method, as shown in fig. 4, on one hand, the characteristic of high brightness of the Mini-LED area light source is fully utilized, and at the same time, the driving current of the backlight in any partition is increased to a certain extent, which has the advantage of stabilizing the brightness.
In the embodiment, the backlight coefficients of any partitioned backlight are lighted after delaying the partitioning of the K rows, so that the backlight can be lighted by adopting gray scale statistical distribution within one frame time, instead of completely adopting the gray scale statistical distribution of the previous frame as the backlight coefficient of the current frame by adopting the traditional partitioned backlight driving method, the fast-changing scene switching can be better adapted, and the phenomena of delay and discontinuity of the picture are avoided.
The embodiment of the invention also provides the electronic equipment. The electronic device comprises at least one processor and a memory connected with the at least one processor, wherein the memory is used for storing instructions which can be executed by the at least one processor, and when the instructions are executed by the at least one processor, the instructions can cause the at least one processor to execute the driving method in the embodiment.
An embodiment of the present invention further provides a non-transitory storage medium storing computer-executable instructions configured to execute the above-mentioned driving method.
Embodiments of the present invention also provide a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described driving method.
The liquid crystal display device provided by the embodiment of the invention can execute the driving method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in the above embodiments, reference may be made to a driving method provided in any embodiment of the present invention.
Compared with the prior art, the invention has the following beneficial effects:
according to the characteristic of low-speed response of liquid crystal, delaying a certain time to carry out the lighting of the current subarea backlight, so that the liquid crystal molecular angle corresponding to any pixel of the subarea backlight is almost deflected to the gray scale voltage corresponding to the pixel when the backlight is lighted, and the response time of the liquid crystal display device is remarkably improved through a black insertion technology;
the high brightness characteristic of the Mini-LED can ensure that enough brightness can be provided even though the backlight is only lighted for a limited time in the current frame, the problem of insufficient brightness of a display device caused by the limitation of the brightness of the backlight source in the traditional black insertion technology is solved, and the unstable characteristic of the Mini-LED area light source in low-current driving is also solved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A driving method of a low-delay liquid crystal display device based on a subarea backlight is characterized in that the liquid crystal display device comprises a plurality of subarea backlights distributed in an array, and the driving method comprises the following steps:
s1, scanning rows and columns of the active array of the display screen to obtain the image gray scale of the current pixel and obtain an image gray scale matrix;
s2, carrying out normalization processing on the image gray-scale matrix according to an electro-optic curve of the display device to obtain a display driving matrix;
s3, dividing the display driving matrix into one-to-one corresponding display subareas according to the subarea backlight, and acquiring the positions of the display subareas where the current pixels are located;
s4, carrying out gray scale distribution statistics of each display partition according to the position of the display partition where the current pixel is located and the display driving matrix, calculating the backlight coefficient when each display partition is lighted according to the gray scale distribution statistics of each display partition, and determining the display partition needing to be lighted according to the position of the current pixel in the display partition and the position of the current display partition in the display driving matrix;
the step S4 includes:
s41, if the current pixel (x, y) is the first pixel of the display partition and the display partition is the first column of the mth row display partition, turning off the m row partition backlight;
s42, if the current pixel (x, y) is the last pixel of the current display partition, calculating the backlight coefficient Blu (m, n) of the display partition where the current pixel is located according to the gray scale distribution of each display partition; if the current display partition is the last column of the mth row display partition, lightening partition backlight before K rows of the current display partition; and if the current pixel (x, y) is the last pixel of the current frame, taking the backlight coefficient of the frame on the display partition as the current backlight coefficient.
2. The driving method according to claim 1, wherein the "K" value is:
k = Integer (Tup × m/16.7), where Tup is the rising edge response time of the liquid crystal and Integer is the rounding operation.
3. The driving method according to claim 1 or 2, wherein the backlight coefficient is calculated in step S4 by:
and counting the gray scale characteristic value distribution of the sub-pixels in the current display partition, and calculating the lighting coefficient of each display partition, wherein the gray scale characteristic value comprises the gray scale maximum value and the gray scale average value of the sub-pixels.
4. The driving method according to claim 1, further comprising:
acquiring a backlight coefficient of each display partition of the previous frame;
calculating the backlight brightness of the current pixel when the backlight of each display subarea is completely lightened;
and calculating a gray scale compensation signal by combining the display driving matrix of the current frame and outputting the gray scale compensation signal to lighten the display screen.
5. The driving method according to claim 1, wherein the electro-optic curve in step S2 is a Gamma curve, and the display driving matrix is indata (x, y, 3) = (gray/2^ N)gammaGray is the image gray scale, and N is the number of bits of the display device.
6. The driving method according to claim 5, wherein the value of Gamma in the display driving matrix is 2.2.
7. A low-delay liquid crystal display device based on subarea backlight is characterized by comprising a backlight unit, a display screen and a driving unit for driving the backlight unit and the display screen, wherein the backlight unit comprises a plurality of subarea backlights distributed in an array, the driving unit comprises a backlight driving unit for lighting the backlight unit and a liquid crystal driving unit for lighting the display screen, and the driving unit drives the liquid crystal display device by the driving method of any one of claims 1-6.
8. The LCD device of claim 7, wherein the backlight unit comprises a plurality of Mini-LED light sources distributed in an array.
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| CN109461413B (en) * | 2019-01-04 | 2021-01-26 | 京东方科技集团股份有限公司 | Backlight driving method and device and liquid crystal display device |
| CN111048053B (en) * | 2020-01-03 | 2021-11-02 | Tcl华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
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