CN117133247A - Liquid crystal display device, display method thereof and electronic equipment - Google Patents

Liquid crystal display device, display method thereof and electronic equipment Download PDF

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Publication number
CN117133247A
CN117133247A CN202311105367.5A CN202311105367A CN117133247A CN 117133247 A CN117133247 A CN 117133247A CN 202311105367 A CN202311105367 A CN 202311105367A CN 117133247 A CN117133247 A CN 117133247A
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China
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gray
display data
brightness
backlight
gray scale
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CN202311105367.5A
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Inventor
胡云川
陈伟
谢俊烽
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Priority to CN202311105367.5A priority Critical patent/CN117133247A/en
Publication of CN117133247A publication Critical patent/CN117133247A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application provides a liquid crystal display device, a display method thereof and electronic equipment, and belongs to the technical field of display equipment. The display method comprises the following steps: in the case of displaying a moving picture by the liquid crystal display device, the gray-scale difference value between the current frame display data and the next frame display data is obtained, so that the gray-scale response time between the current frame display data and the next frame display data can be determined according to the gray-scale difference value and the corresponding relation between the gray-scale difference value and the gray-scale response time. Meanwhile, according to the display data of the current frame and the display data of the next frame, the gray scale switching starting time corresponding to the display data of the current frame can be determined. And the brightness of the backlight source is adjusted to be lower than the preset brightness at the gray level switching starting time, the original brightness of the backlight source is adjusted back after the gray level response time is maintained, and the brightness of the backlight source is controlled to be lower than the preset brightness at the gray level response time corresponding to the display data of two adjacent frames, so that the problem of motion image blurring when a motion picture is displayed can be effectively solved.

Description

Liquid crystal display device, display method thereof and electronic equipment
Technical Field
The present application relates to the field of liquid crystal display devices, and in particular, to a liquid crystal display device, a display method thereof, and an electronic device.
Background
LCD (Liquid Crystal Display ) has become the most widely used flat display device at present due to a number of advantages. However, the combined effect of the sample and hold mode of operation inherent to the LCD and the eye tracking effect causes the LCD to appear as a motion image blur when displaying a moving picture.
Disclosure of Invention
The embodiment of the application mainly aims to provide a liquid crystal display device, a display method thereof and electronic equipment. The method aims to effectively solve the problem of motion image blurring when displaying a motion picture by controlling the backlight source to be kept below a preset brightness in the gray-scale response time corresponding to the display data of the current frame and the display data of the next frame.
To achieve the above object, a first aspect of an embodiment of the present application provides a display method of a liquid crystal display device, where the liquid crystal display device includes a backlight module, and the backlight module is provided with a backlight source, and the method includes:
acquiring a first gray scale value corresponding to current frame display data and a second gray scale value corresponding to next frame display data for the condition that the liquid crystal display device displays a moving picture;
determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value and the second gray scale value;
Determining a gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the next frame display data;
and adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time, and adjusting the original brightness of the backlight source back after maintaining the gray level response time so as to display the moving picture.
In one embodiment of the present application, before acquiring the first gray-scale value corresponding to the current frame display data and the second gray-scale value corresponding to the next frame display data, the method further includes:
comparing current frame display data with next frame display data in the data to be displayed;
if the current frame display data is the same as the next frame display data, determining that the picture corresponding to the data to be displayed is a static picture;
and if the current frame display data is different from the next frame display data, determining that the picture corresponding to the data to be displayed is a moving picture.
In one embodiment of the present application, for a case where the liquid crystal display device displays a moving picture, the method further includes:
at least two adjacent frames of display data are stored.
In one embodiment of the present application, the determining a gray scale response time between the current frame display data and the next frame display data according to the first gray scale value and the second gray scale value includes:
Calling a first corresponding table of predetermined gray-scale value switching and gray-scale response time;
and determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value, the second gray scale value and the first corresponding table.
In one embodiment of the present application, the adjusting the brightness of the backlight to be lower than a preset brightness at the gray-scale switching start time and adjusting back to the original brightness of the backlight after maintaining the gray-scale response time to display the moving picture includes:
determining a gray scale switching end time according to the gray scale switching start time and the gray scale response time;
and adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time until the original brightness of the backlight source is adjusted back at the gray level switching ending time so as to display the moving picture.
In one embodiment of the present application, after determining the gray-scale switching end time according to the gray-scale switching start time and the gray-scale response time, the method further includes:
measuring a first display brightness corresponding to the gray scale switching end time;
comparing whether the first display brightness is equal to the target display brightness corresponding to the second gray scale value corresponding to the display data of the next frame;
And if the first display brightness is not equal to the target display brightness, taking the display time corresponding to the target display brightness as the gray scale switching ending time.
A second aspect of an embodiment of the present application provides a liquid crystal display device, the liquid crystal display device including a backlight module, the backlight module being provided with a backlight source, the liquid crystal display device including:
the acquisition module is used for acquiring a first gray scale value corresponding to the display data of the current frame and a second gray scale value corresponding to the display data of the next frame in the case that the liquid crystal display device displays a moving picture;
a first determining module, configured to determine a gray-scale response time between the current frame display data and the next frame display data according to the first gray-scale value and the second gray-scale value;
the second determining module is used for determining the gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the next frame display data;
and the adjusting module is used for adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time and adjusting the original brightness of the backlight source after maintaining the gray level response time so as to display the moving picture.
A third aspect of the embodiment of the present application provides a liquid crystal display device, where the liquid crystal display device includes a liquid crystal panel, a driving module, a backlight module, and a backlight control module, and the backlight module is provided with a backlight source; the driving module is electrically connected with the liquid crystal panel and the backlight control module, and the backlight control module is electrically connected with the backlight module;
the driving module is used for driving the liquid crystal panel according to the data to be displayed, and determining gray scale response time and gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the last and next frame display data in the data to be displayed;
the backlight control module is used for:
a first backlight control signal is sent to the backlight module at the gray level switching starting time so as to control and adjust the brightness of the backlight source to be lower than preset brightness;
and when the duration time that the brightness of the backlight source is lower than the preset brightness reaches the gray level response time, sending a second backlight control signal to the backlight module to control the original brightness of the backlight source to be adjusted back.
In one embodiment of the present application, the driving module is configured to determine a gray scale switching end time according to the gray scale switching start time and the gray scale response time;
Accordingly, the backlight control module is used for:
a first backlight control signal is sent to the backlight module at the gray level switching starting time so as to control and adjust the brightness of the backlight source to be lower than preset brightness;
and sending a second backlight control signal to the backlight module at the gray level switching end time so as to control and adjust back the original brightness of the backlight source.
A third aspect of the embodiments of the present application proposes an electronic device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the display method according to any of the embodiments of the present application when executing the computer program.
In the technical scheme provided by the embodiment of the application, in the case that the liquid crystal display device displays a moving picture, the gray-scale response time between the current frame display data and the next frame display data can be determined according to the gray-scale difference value and the corresponding relation between the gray-scale difference value and the gray-scale response time by acquiring the gray-scale difference value between the current frame display data and the next frame display data. Meanwhile, according to the display data of the current frame and the display data of the next frame, the gray scale switching starting time corresponding to the display data of the current frame can be determined. And the brightness of the backlight source is adjusted to be lower than the preset brightness at the gray level switching starting time and the original brightness of the backlight source is adjusted back after the gray level response time is maintained, so that the brightness of the backlight source is controlled to be lower than the preset brightness in the gray level switching process corresponding to the display data of two adjacent frames, and the problem of motion image blurring when displaying a motion picture can be effectively solved.
Drawings
FIG. 1 is a schematic diagram of a pixel architecture of an LCD;
fig. 2 is a flowchart of a display method of a liquid crystal display device according to an embodiment of the present application;
FIG. 3 is a flowchart illustrating steps performed before acquiring a first gray-scale value corresponding to display data of a current frame and a second gray-scale value corresponding to display data of a next frame according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating steps for determining a gray scale response time between current frame display data and next frame display data according to a first gray scale value and a second gray scale value according to an embodiment of the present application;
FIG. 5 is a schematic diagram of gray level switching according to an embodiment of the present application;
FIG. 6 is a flowchart showing steps for adjusting the brightness of the backlight source to be lower than the preset brightness at the beginning of gray-scale switching and returning to the original brightness of the backlight source after maintaining the gray-scale response time, so as to display a moving picture according to the embodiment of the present application;
FIG. 7 is a flowchart illustrating steps performed after determining a gray-scale switching end time according to a gray-scale switching start time and a gray-scale response time according to an embodiment of the present application;
FIG. 8 is another schematic diagram of gray level switching according to an embodiment of the present application;
FIG. 9 is another schematic diagram of gray level switching according to an embodiment of the present application;
Fig. 10 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application;
fig. 11 is a schematic diagram of another structure of a liquid crystal display device according to an embodiment of the present application;
fig. 12 is a schematic hardware structure of an electronic device according to an embodiment of the present application.
Description of main reference numerals:
100-a liquid crystal display device; 101-an acquisition module; 102-a first determination module; 103-a second determination module; 104-an adjustment module; 110-a liquid crystal display device; 111-a liquid crystal panel; 112-a drive module; 113-a backlight module; 1131-backlight; 114-a backlight control module; 1201-a processor; 1202-memory; 1203-input/output interface; 1204-a communication interface; 1205-bus.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the application only and is not intended to be limiting of the application.
With the evolution of photoelectric and semiconductor technologies, flat panel displays have been actively developed, and among many flat panel displays, liquid crystal displays (liquid crystal display, i.e., LCDs) have been used in various aspects of production and life due to their excellent characteristics of high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference.
However, the combined effect of the sample and hold mode of operation inherent to the LCD and the eye tracking effect causes the LCD to appear as a motion image blur when displaying a moving picture. Specifically, referring to fig. 1, fig. 1 is a schematic diagram of a pixel architecture of an LCD. As shown in fig. 1, when a TFT (thin film transistor) is turned on, a signal current charges a storage capacitor Cst, so that a voltage proportional to a signal magnitude is formed on the storage capacitor Cst. During the TFT off period, the voltage on the storage capacitor Cst remains substantially unchanged throughout the frame period, and drives the pixel throughout the frame period to remain in the corresponding on state. This is the so-called Hold-Type mode of operation. The TFT-LCD (thin film transistor liquid crystal display) operates in a Hold-Type mode (Hold-Type) is an important cause of generating motion image blur.
In order to overcome the problem of blurring in moving image display of a liquid crystal display, the related art adopts a backlight blinking method, i.e., a method in which a backlight is turned on simultaneously for 60% of a frame (backlight duty ratio is 60%) and turned off simultaneously for the remaining time. It can be seen that the problem of blurring in moving image display is overcome by controlling the backlight to emit light at 60% of one frame and to extinguish at the rest of the time (i.e. 40% of one frame). However, since the gray scale values corresponding to the display data of each frame are different, the gray scale response time between the display data of two adjacent frames is also different, and thus, when the gray scale response time is long, for example, greater than 40% of the frame, the problem of blurring of the moving image cannot be completely eliminated because the backlight is controlled to be extinguished only at 40% of the frame.
Based on this, the embodiment of the application provides a display method of a liquid crystal display device. The method aims to effectively solve the problem of motion image blurring when displaying a motion picture by controlling a backlight source in a backlight module to be kept in a state lower than preset brightness in the gray scale response time corresponding to the display data of the current frame and the display data of the previous frame.
Referring to fig. 2, fig. 2 is a flowchart of a display method of a liquid crystal display device according to an embodiment of the application, including but not limited to steps S210 to S240. The liquid crystal display device comprises a backlight module, and the backlight module is provided with a backlight source.
Step S210, for the case that the liquid crystal display device displays a moving picture, acquiring a first gray-scale value corresponding to the display data of the current frame and a second gray-scale value corresponding to the display data of the next frame.
In the embodiment of the application, the TFT-LCD (thin film transistor liquid crystal display) is considered to work in a Hold-Type mode (Hold-Type) which is an important cause for generating motion image blurring. That is, the LCD realizes display by modulating light of a backlight, and a general LCD backlight is always on and continuously emits light. Since the holding characteristics of the TFT-LCD cannot be changed, if the light emission of the backlight is controlled so that it is changed from continuous light emission to light emission for only a certain period of one frame, the holding characteristics of the TFT are improved, and the blurring of moving images can be significantly improved. Therefore, in the case that the liquid crystal display device displays a moving picture, the application acquires the first gray scale value corresponding to the current frame display data and the second gray scale value corresponding to the next frame display data, so that the gray scale response time between the current frame display data and the next frame display data can be determined based on the first gray scale value corresponding to the current frame display data and the second gray scale value corresponding to the next frame display data.
In an embodiment of the present application, referring to fig. 3, fig. 3 is a flowchart of steps performed before acquiring a first gray-scale value corresponding to current frame display data and a second gray-scale value corresponding to next frame display data, including but not limited to steps S310 to S330, provided in the embodiment of the present application.
Step S310, comparing the current frame display data with the next frame display data in the data to be displayed;
step S320, if the current frame display data is the same as the next frame display data, determining that the picture corresponding to the data to be displayed is a static picture;
in step S330, if the current frame display data is different from the next frame display data, the picture corresponding to the data to be displayed is determined to be a moving picture.
In the embodiment of the application, the problem to be solved is that the liquid crystal display device generates the phenomena of smear and blurring when displaying the moving picture, namely, the corresponding processing is needed when the moving picture is displayed, so as to solve the problem of blurring of the moving picture when displaying the moving picture. Therefore, it is necessary to detect the screen displayed on the liquid crystal display device. Specifically, the state of the picture corresponding to the data to be displayed can be determined by comparing the current frame display data with the next frame display data in the data to be displayed. Specifically, if the current frame display data is the same as the next frame display data, the picture corresponding to the data to be displayed is determined to be a static picture. If the current frame display data is different from the next frame display data, determining that the picture corresponding to the data to be displayed is a moving picture.
In the embodiment of the application, the current frame display data and the next frame display data in the data to be displayed are compared, so that whether the picture corresponding to the data to be displayed is a moving picture or a static picture can be accurately judged. Accordingly, when the data to be displayed is judged to be a moving picture with respect to the displayed picture, corresponding processing can be performed to solve the problem of moving image blurring occurring when the moving picture is displayed.
In one embodiment of the present application, in the case where the liquid crystal display device displays a moving picture, the display method further includes:
at least two adjacent frames of display data are stored.
In the embodiment of the application, for the case that the liquid crystal display device displays a moving picture, at least two adjacent frames of display data need to be stored, that is, at least the current frame of display data and the next frame of display data need to be stored before the current frame of display data is displayed, so that whether the data to be displayed is the moving picture for the displayed picture can be judged according to the stored at least two adjacent frames of display data. Meanwhile, when the data to be displayed is determined to be a moving picture for a displayed picture, the gray scale response time between the current frame of display data and the next frame of display data can be obtained through the first gray scale value corresponding to the current frame of display data and the second gray scale value corresponding to the next frame of display data.
Step S220, determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value and the second gray scale value.
In the embodiment of the application, after the first gray-scale value corresponding to the current frame display data and the second gray-scale value corresponding to the next frame display data are obtained, the gray-scale response time between the current frame display data and the next frame display data can be further determined according to the first gray-scale value and the second gray-scale value.
Referring to fig. 4, fig. 4 is a flowchart illustrating steps of determining a gray scale response time between current frame display data and next frame display data according to a first gray scale value and a second gray scale value according to an embodiment of the present application, including but not limited to steps S410 to S420.
Step S410, a first corresponding table of predetermined gray-scale value switching and gray-scale response time is called;
step S420, determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value, the second gray scale value and the first correspondence table.
In the embodiment of the application, the first correspondence table of the gray scale value switching and the gray scale response time can be written into the liquid crystal display device after being determined in advance through experimental measurement. Therefore, after the liquid crystal display device obtains the first gray scale value corresponding to the display data of the current frame and the second gray scale value corresponding to the display data of the next frame, the gray scale response time between the display data of the current frame and the display data of the next frame can be directly determined in a table look-up mode.
For example, referring to table 1, table 1 is a first correspondence table of gray-scale value switching and gray-scale response time. As shown in table 1, when the first gray-scale value corresponding to the display data of the current frame is (0, 0) and the second gray-scale value corresponding to the display data of the next frame is (16, 16, 16), the corresponding gray-scale response time is T 0-16 . When the first gray scale value corresponding to the display data of the current frame is (16, 16, 16) and the second gray scale value corresponding to the display data of the next frame is (0, 0), the corresponding gray scale response time is T 16-0 。
TABLE 1 first mapping table of gray level switching and gray level response time
It should be noted that, the first mapping table of the gray scale value switching and the gray scale response time shown in table 1 may be 256 gray scale values in total by setting the first gray scale value and the second gray scale value to be 0-255. In the measurement process, 255 corresponding gray scale response times when the first gray scale value is 0 and the second gray scale value is 1-255 and the total of 255 gray scale values can be sequentially measured respectively. Then sequentially measuring 255 gray scale response times corresponding to the first gray scale value of 1 and the second gray scale value of 0 and 255 gray scale values of 2-255. In this way, a total of 255×256 gray scale response times can be obtained.
It should be noted that, the first correspondence table of gray-scale value switching and gray-scale response time shown in table 1 may also be a first correspondence table of gray-scale value switching and gray-scale response time obtained by measuring the gray-scale response time corresponding to the first gray-scale value and the second gray-scale value which are both specific gray-scale values, such as (16, 16, 16), (32, 32), (64, 64), (127, 127, 127), (255, 255, 255), and then obtaining the gray-scale response time corresponding to other gray-scale value switching by interpolation.
Illustratively, when the first gray level value is (0, 0) and the second gray level value is (136, 136, 136), the gray level response time corresponding to switching from the first gray level value to the second gray level value is 7.35ms. When the second gray scale value is (187, 187, 187), the gray scale response time corresponding to switching from the first gray scale value to the second gray scale value is 10.7ms. When the second gray level value is (224, 224, 224), the gray level response time corresponding to the switching from the first gray level value to the second gray level value is 8.19. When the second gray level value is (255, 255, 255), the gray level response time corresponding to switching from the first gray level value to the second gray level value is 22.98ms. When the first gray level value is (0, 0), the second gray level value is the gray level response time corresponding to the specific gray level value, for example, when the second gray level value is (136, 136, 136), (187 ), (224, 224, 224), (255, 255, 255), the gray level response time corresponding to the first gray level value is switched to the second gray level value is measured, and then the interpolation method is utilized to calculate the gray level response time corresponding to the second gray level value as other gray level values.
In the embodiment of the application, the first corresponding table of the gray scale value switching and gray scale response time can be obtained through measurement, so that after the first gray scale value corresponding to the display data of the current frame and the second gray scale value corresponding to the display data of the next frame are obtained, the first corresponding table can be directly inquired, and the gray scale response time between the display data of the current frame and the display data of the next frame can be determined.
Step S230, determining the gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the next frame display data.
In the embodiment of the application, the gray scale switching starting time corresponding to the current frame display data is determined according to the current frame display data and the next frame display data. Referring to fig. 5, fig. 5 is a schematic diagram of gray scale switching according to an embodiment of the present application. As shown in fig. 5, if the first gray scale value corresponding to the display data of the current frame is gray scale 0, the gray scale value corresponding to the display data of the next frame is gray scale 1. The gray-scale response time for converting from gray-scale 0 to gray-scale 1 is T, the gray-scale switching start time corresponding to the display data of the current frame is T0, and the gray-scale switching end time corresponding to the display data of the current frame is T1, i.e., T1-t0=t.
In step S240, the brightness of the backlight is adjusted to be lower than the preset brightness at the beginning of the gray-scale switching, and the original brightness of the backlight is returned after the gray-scale response time is maintained, so as to display the moving picture.
In the embodiment of the application, after the gray-scale switching starting time corresponding to the display data of the current frame and the gray-scale response time between the display data of the current frame and the display data of the next frame are determined, the brightness of the backlight source can be controlled and regulated at the gray-scale switching starting time to be lower than the preset brightness and the original brightness of the backlight source can be regulated back after the gray-scale response time is maintained, so that a moving picture can be displayed.
The preset luminance is a luminance determined without affecting the moving picture display, and may be determined according to the display luminance corresponding to the current frame display data. The preset brightness may be 0, and when the preset brightness is 0, it is actually to control the backlight to be turned off at the gray-scale switching start time and to light the backlight after maintaining the gray-scale response time, so as to display the moving picture. The original brightness is the brightness corresponding to the normal light emission of the backlight source, namely the brightness corresponding to the light emission (lighting) of the backlight source is controlled by a fixed voltage in the driving process.
In an embodiment of the present application, referring to fig. 6, fig. 6 is a flowchart illustrating steps of adjusting the brightness of the backlight source to be lower than a preset brightness at the start time of gray-scale switching and adjusting back to the original brightness of the backlight source after maintaining the gray-scale response time to display a moving picture according to the embodiment of the present application, including but not limited to steps S610 to S620.
Step S610, determining the gray scale switching ending time according to the gray scale switching starting time and the gray scale response time;
in step S620, the brightness of the backlight is adjusted to be lower than the preset brightness at the beginning time of the gray-scale switching until the original brightness of the backlight is adjusted back at the ending time of the gray-scale switching, so as to display the moving picture.
In the embodiment of the application, after the gray-scale switching starting time corresponding to the display data of the current frame and the gray-scale response time between the display data of the current frame and the display data of the next frame are determined, the gray-scale switching ending time can be determined according to the gray-scale switching starting time and the gray-scale response time, so that the brightness of the backlight source can be adjusted to be lower than the preset brightness at the gray-scale switching starting time until the original brightness of the backlight source is adjusted back at the gray-scale switching ending time, and a moving picture can be displayed. Similarly, when the preset brightness is 0, it controls the backlight to be turned off at the gray-scale switching start time and maintains the turned-off state until the backlight is controlled to be turned on at the gray-scale switching end time to display the moving picture.
In the embodiment of the application, the backlight source is controlled to be kept in a state lower than the preset brightness in the gray scale response time corresponding to the display data of the current frame and the display data of the previous frame, so that the problem of motion image blurring when a motion picture is displayed can be effectively solved.
In one embodiment of the present application, referring to fig. 7, fig. 7 is a flowchart of steps performed after determining a gray-scale switching end time according to a gray-scale switching start time and a gray-scale response time provided in the embodiment of the present application, including but not limited to steps S710 to S730.
Step S710, measuring a first display brightness corresponding to the gray scale switching end time;
step S720, comparing whether the first display brightness is equal to the target display brightness corresponding to the second gray scale value corresponding to the display data of the next frame;
in step S730, if the first display luminance is not equal to the target display luminance, the display time corresponding to the target display luminance is taken as the gray-scale switching end time.
In the embodiment of the present application, considering that the first mapping table of gray scale value switching and gray scale response time is a measured value (i.e., gray scale response time) obtained by actual measurement through experiments, the measured gray scale response time may have a certain error, for example, the measured value obtained by actual measurement is longer than the whole display duration of a frame or is far smaller than the real gray scale response time. At this time, controlling the backlight to maintain a state lower than the preset brightness in the gray-scale response time affects the normal display of the picture. Therefore, after the gray-scale switching start time and the gray-scale response time are determined, the first display brightness corresponding to the gray-scale switching end time can be further measured, and then whether the first display brightness is equal to the target display brightness corresponding to the second gray-scale value corresponding to the display data of the next frame is compared. If the first display brightness is not equal to the target display brightness, the display time corresponding to the target display brightness is taken as the gray scale switching end time, so that the gray scale response time is corrected.
Referring to fig. 8, fig. 8 is another schematic diagram of gray scale switching according to an embodiment of the present application. As shown in fig. 8, if the first gray scale value corresponding to the display data of the current frame is gray scale 0, the gray scale value corresponding to the display data of the next frame is gray scale 1. The gray scale response time of converting the gray scale 0 into the gray scale 1 is obtained through measurement, the gray scale switching starting time corresponding to the display data of the current frame is T0, the gray scale switching ending time obtained through calculation according to the gray scale response time T and the gray scale switching starting time T0 is T1, and t0+T=t1. At this time, the luminance corresponding to the gradation switching end time T1 is the first display luminance. The display time corresponding to the target display brightness corresponding to the gray level 1 is T2, that is, the target display brightness corresponding to the gray level 1 starts to be displayed at the time T2. At this time, the first display luminance is smaller than the target display luminance, which means that the gray-scale switching end time determined according to the measured gray-scale response time is earlier than the gray-scale switching end time of the actual gray-scale value switching, and at this time, the gray-scale switching end time T1 calculated according to the gray-scale response time T and the gray-scale switching start time T0 needs to be replaced with the display time T2 corresponding to the target display luminance corresponding to the gray-scale 1. At this time, the gray scale response time is actually T2-T0.
In the embodiment of the present application, referring to fig. 9, fig. 9 is another schematic diagram of gray scale switching according to the embodiment of the present application. As shown in fig. 9, if the first gray scale value corresponding to the display data of the current frame is gray scale 0, the gray scale value corresponding to the display data of the next frame is gray scale 1. The gray scale response time of converting the gray scale 0 into the gray scale 1 is obtained through measurement, the gray scale switching starting time corresponding to the display data of the current frame is T0, the gray scale switching ending time obtained through calculation according to the gray scale response time T and the gray scale switching starting time T0 is T1, and t0+T=t1. The display time corresponding to the target display brightness corresponding to the gray level 1 is T2, that is, the target display brightness corresponding to the gray level 1 starts to be displayed at the time T2. At this time, T1 is greater than T2, which means that the gray-scale switching end time determined according to the measured gray-scale response time is later than the gray-scale switching end time of the actual gray-scale value switching, and at this time, the gray-scale switching end time T1 calculated according to the gray-scale response time T and the gray-scale switching start time T0 needs to be replaced by the display time T2 corresponding to the target display brightness corresponding to the gray-scale 1. At this time, the gray scale response time is actually T2-T0.
Referring to fig. 10, an embodiment of the application further provides a liquid crystal display device 100, the liquid crystal display device includes a backlight module, the backlight module is provided with a backlight source, and the liquid crystal display device includes:
An obtaining module 101, configured to obtain, for a case where the liquid crystal display device displays a moving picture, a first gray-scale value corresponding to display data of a current frame and a second gray-scale value corresponding to display data of a next frame;
a first determining module 102, configured to determine a gray-scale response time between the current frame display data and the next frame display data according to the first gray-scale value and the second gray-scale value;
a second determining module 103, configured to determine, according to the current frame display data and the next frame display data, a gray scale switching start time corresponding to the current frame display data;
the adjusting module 104 is configured to adjust the brightness of the backlight source to be lower than the preset brightness at the beginning time of gray-scale switching and to adjust back the original brightness of the backlight source after maintaining the gray-scale response time, so as to display the moving picture.
The specific implementation of the liquid crystal display device is substantially the same as the specific example of the display method of the liquid crystal display device, and will not be described herein.
Referring to fig. 11, an embodiment of the application further provides a liquid crystal display device 110. The liquid crystal display device 110 includes a liquid crystal panel 111, a driving module 112, a backlight module 113, and a backlight control module 114, wherein the backlight module 113 is provided with a backlight 1131. The driving module 112 is electrically connected to the liquid crystal panel 111 and the backlight control module 114, and the backlight control module 114 is electrically connected to the backlight module 113.
The driving module 112 is configured to drive the liquid crystal panel 111 according to the data to be displayed, and determine a gray-scale response time and a gray-scale switching start time corresponding to the current frame display data according to the current frame display data and the previous and next frame display data in the data to be displayed;
the backlight control module 114 is configured to:
transmitting a first backlight control signal to the backlight module 113 at the gray level switching start time to control and adjust the brightness of the backlight 1131 to be lower than the preset brightness;
when the duration of the brightness of the backlight 1131 lower than the preset brightness reaches the gray-scale response time, a second backlight control signal is sent to the backlight module 113 to control the original brightness of the backlight 1131 to be adjusted back.
In the embodiment of the present application, the driving module 112 may determine the gray-scale response time according to the first gray-scale value corresponding to the current frame display data and the second gray-scale value corresponding to the previous and next frame display data in the display data. Meanwhile, the gray scale switching starting time corresponding to the current frame display data can be determined according to the current frame display data and the previous and next frame display data. The driving module 112 may send the determined gray-scale response time and the gray-scale switching start time corresponding to the display data of the current frame to the backlight control module 114. Therefore, the backlight control module 114 can send the first backlight control signal to the backlight module 113 at the starting time of gray level switching, so as to control and adjust the brightness of the backlight 1131 to be lower than the preset brightness. Meanwhile, when the duration of the brightness of the backlight 1131 being lower than the preset brightness reaches the gray-scale response time, the backlight control module 114 may send a second backlight control signal to the backlight module 113 to control the original brightness of the backlight 1131 to be adjusted back.
In the embodiment of the application, the backlight control module 114 can control the backlight 1131 to maintain a state lower than the preset brightness in the gray-scale response time between the current frame display data and the next frame display data by sending the first backlight control signal to the backlight module 113 at the gray-scale switching start time and sending the second backlight control signal to the backlight module 113 when the duration of the brightness of the backlight 1131 lower than the preset brightness reaches the gray-scale response time, so that the problem of motion image blurring when displaying the motion picture can be solved.
In one embodiment of the present application, the driving module 112 may be further configured to determine a gray scale switching end time according to the gray scale switching start time and the gray scale response time;
accordingly, the backlight control module 114 is configured to:
transmitting a first backlight control signal to the backlight module 113 at the gray level switching start time to control and adjust the brightness of the backlight 1131 to be lower than the preset brightness;
and sending a second backlight control signal to the backlight module 113 at the end time of gray-scale switching to control the original brightness of the backlight 1131 to be adjusted back.
In the embodiment of the present application, after determining the gray-scale response time and the gray-scale switching start time corresponding to the display data of the current frame, the driving module 112 may further determine the gray-scale switching end time according to the gray-scale switching start time and the gray-scale response time. Thus, the driving module 112 may send the determined gray-scale switching start time and gray-scale switching end time to the backlight control module 114. Accordingly, the backlight control module 114 may send the first backlight control signal to the backlight module 113 at the gray level switching start time to control and adjust the brightness of the backlight 1131 to be lower than the preset brightness. And sends a second backlight control signal to the backlight module 113 at the end of the gray-scale switching to control the original brightness of the backlight 1131.
In the embodiment of the application, the backlight control module 114 sends the first backlight control signal to the backlight module 113 at the beginning time of gray-scale switching and sends the second backlight control signal to the backlight module 113 at the ending time of gray-scale switching, so that the backlight 1131 can be controlled to maintain a state lower than the preset brightness in the gray-scale response time between the current frame display data and the next frame display data, and the problem of motion image blurring when displaying the motion image can be solved.
The embodiment of the application also provides electronic equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the display method of the liquid crystal display device when executing the computer program. The electronic equipment can be any intelligent terminal including a tablet personal computer, a vehicle-mounted computer and the like.
Referring to fig. 12, fig. 12 illustrates a hardware structure of an electronic device according to another embodiment, the electronic device includes:
the processor 1201 may be implemented by a general purpose CPU (central processing unit), a microprocessor, an application specific integrated circuit (ApplicationSpecificIntegratedCircuit, ASIC), or one or more integrated circuits, etc. for executing related programs to implement the technical solution provided by the embodiments of the present application;
Memory 1202 may be implemented in the form of read-only memory (ReadOnlyMemory, ROM), static storage, dynamic storage, or random access memory (RandomAccessMemory, RAM). The memory 1202 may store an operating system and other application programs, and when the technical solutions provided in the embodiments of the present disclosure are implemented by software or firmware, relevant program codes are stored in the memory 1202, and the processor 1201 invokes a display method of the liquid crystal display device to perform the embodiments of the present disclosure;
an input/output interface 1203 for implementing information input and output;
the communication interface 1204 is configured to implement communication interaction between the device and other devices, and may implement communication in a wired manner (e.g., USB, network cable, etc.), or may implement communication in a wireless manner (e.g., mobile network, WIFI, bluetooth, etc.);
a bus 1205 for transferring information between various components of the device such as the processor 1201, memory 1202, input/output interface 1203, and communication interface 1204;
wherein the processor 1201, the memory 1202, the input/output interface 1203 and the communication interface 1204 enable communication connection between each other inside the device via a bus 1205.
The embodiment of the application also provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program realizes the display method of the liquid crystal display device when being executed by a processor.
The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The embodiments described in the embodiments of the present application are for more clearly describing the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
It will be appreciated by persons skilled in the art that the embodiments of the application are not limited by the illustrations, and that more or fewer steps than those shown may be included, or certain steps may be combined, or different steps may be included.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description of the application and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise 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.
It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is merely a logical function division, and there may be another division manner in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing a program.
The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the embodiments of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.

Claims (10)

1. A display method of a liquid crystal display device, the liquid crystal display device including a backlight module provided with a backlight source, the method comprising:
acquiring a first gray scale value corresponding to current frame display data and a second gray scale value corresponding to next frame display data for the condition that the liquid crystal display device displays a moving picture;
determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value and the second gray scale value;
determining a gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the next frame display data;
and adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time, and adjusting the original brightness of the backlight source back after maintaining the gray level response time so as to display the moving picture.
2. The method of claim 1, wherein prior to obtaining the first gray scale value corresponding to the current frame of display data and the second gray scale value corresponding to the next frame of display data, the method further comprises:
comparing current frame display data with next frame display data in the data to be displayed;
if the current frame display data is the same as the next frame display data, determining that the picture corresponding to the data to be displayed is a static picture;
and if the current frame display data is different from the next frame display data, determining that the picture corresponding to the data to be displayed is a moving picture.
3. The method according to claim 1, wherein for a case where the liquid crystal display device displays a moving picture, the method further comprises:
at least two adjacent frames of display data are stored.
4. The method of claim 1, wherein determining a gray scale response time between the current frame display data and the next frame display data based on the first gray scale value and the second gray scale value comprises:
calling a first corresponding table of predetermined gray-scale value switching and gray-scale response time;
And determining gray scale response time between the current frame display data and the next frame display data according to the first gray scale value, the second gray scale value and the first corresponding table.
5. The method of claim 1, wherein adjusting the brightness of the backlight to be lower than a preset brightness at the gray-scale switching start time and adjusting back to the original brightness of the backlight after maintaining the gray-scale response time to display the moving picture comprises:
determining a gray scale switching end time according to the gray scale switching start time and the gray scale response time;
and adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time until the original brightness of the backlight source is adjusted back at the gray level switching ending time so as to display the moving picture.
6. The method of claim 5, wherein after determining a gray scale switching end time based on the gray scale switching start time and the gray scale response time, the method further comprises:
measuring a first display brightness corresponding to the gray scale switching end time;
comparing whether the first display brightness is equal to the target display brightness corresponding to the second gray scale value corresponding to the display data of the next frame;
And if the first display brightness is not equal to the target display brightness, taking the display time corresponding to the target display brightness as the gray scale switching ending time.
7. A liquid crystal display device comprising a backlight module provided with a backlight, characterized in that the liquid crystal display device comprises:
the acquisition module is used for acquiring a first gray scale value corresponding to the display data of the current frame and a second gray scale value corresponding to the display data of the next frame in the case that the liquid crystal display device displays a moving picture;
a first determining module, configured to determine a gray-scale response time between the current frame display data and the next frame display data according to the first gray-scale value and the second gray-scale value;
the second determining module is used for determining the gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the next frame display data;
and the adjusting module is used for adjusting the brightness of the backlight source to be lower than the preset brightness at the gray level switching starting time and adjusting the original brightness of the backlight source after maintaining the gray level response time so as to display the moving picture.
8. The liquid crystal display device is characterized by comprising a liquid crystal panel, a driving module, a backlight module and a backlight control module, wherein the backlight module is provided with a backlight source; the driving module is electrically connected with the liquid crystal panel and the backlight control module, and the backlight control module is electrically connected with the backlight module;
the driving module is used for driving the liquid crystal panel according to the data to be displayed, and determining gray scale response time and gray scale switching starting time corresponding to the current frame display data according to the current frame display data and the last and next frame display data in the data to be displayed;
the backlight control module is used for:
a first backlight control signal is sent to the backlight module at the gray level switching starting time so as to control and adjust the brightness of the backlight source to be lower than preset brightness;
and when the duration time that the brightness of the backlight source is lower than the preset brightness reaches the gray level response time, sending a second backlight control signal to the backlight module to control the original brightness of the backlight source to be adjusted back.
9. The liquid crystal display device according to claim 8, wherein:
the driving module is used for determining the gray scale switching ending time according to the gray scale switching starting time and the gray scale response time;
Accordingly, the backlight control module is used for:
a first backlight control signal is sent to the backlight module at the gray level switching starting time so as to control and adjust the brightness of the backlight source to be lower than preset brightness;
and sending a second backlight control signal to the backlight module at the gray level switching end time so as to control and adjust back the original brightness of the backlight source.
10. An electronic device comprising a memory storing a computer program and a processor implementing the method of claims 1-6 when executing the computer program.
CN202311105367.5A 2023-08-30 2023-08-30 Liquid crystal display device, display method thereof and electronic equipment Pending CN117133247A (en)

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