Driving method of display device and display device

Abstract

The invention provides a driving method of a display device and the display device.The driving method of the display device comprises the steps that a first target gray scale of a current frame of a sub-pixel and a second target gray scale of a next frame of the sub-pixel are obtained; looking up the table to obtain a first response time of changing the sub-pixel from the first target gray scale to the second target gray scale and a fourth response time of changing the sub-pixel from the first target gray scale to the reference gray scale and from the reference gray scale to the second target gray scale; the sub-pixels are controlled to display the reference gray scale in the white insertion time, the second target gray scale is displayed in the next frame, the reference gray scale is used as the transition gray scale, the conversion of the liquid crystal from the current gray scale to the second target gray scale is accelerated, the response time is shortened, and the charging rate of the sub-pixels and the display effect of the display panel are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a driving method of a display device and the display device. BACKGROUND

[0002] The liquid crystal display device comprises a display panel and a backlight module for providing backlight for the display panel, the display panel comprises an array substrate, an opposite substrate and a liquid crystal layer arranged between the array substrate and the opposite substrate, when displaying a picture, an electric field is formed between the array substrate and the opposite substrate, and the liquid crystal of the liquid crystal layer is deflected to display a corresponding picture.

[0003] Due to the viscous effect of liquid crystal, there is a response time when controlling the sub-pixels of the display panel to switch the gray scale display in different frames, and the long response time will cause insufficient pixel charging rate, affecting the display effect of the display panel.

[0004] In order to shorten the response time of the liquid crystal when switching the gray scale, the conventional method is to apply a driving voltage higher than the corresponding driving voltage of the next frame gray scale when switching to the next frame to accelerate the response of the liquid crystal, and to realize overdrive, but there is still a problem of insufficient response time. SUMMARY

[0005] The purpose of the present application is to provide a driving method of a display device, which aims to solve the problem of long response time of liquid crystal when switching the gray scale of the sub-pixel.

[0006] The first aspect of the embodiment of the present application provides a driving method of a display device, the display device comprising a display panel and a backlight module, the display panel comprising a plurality of sub-pixels arranged in an array, the driving method of the display device comprising: obtaining a first target gray scale of a current frame and a second target gray scale of a next frame of each sub-pixel, when the first target gray scale and the second target gray scale are different, obtaining a first response time of each sub-pixel from the first target gray scale directly changing to the second target gray scale by table lookup, and obtaining a second response time of the sub-pixel from the first target gray scale changing to a reference gray scale and a third response time of the sub-pixel from the reference gray scale changing to the second target gray scale by table lookup; when the first response time is greater than a fourth response time, inserting a white insertion time between the current frame and the next frame of the sub-pixel, and controlling the corresponding sub-pixel to display the reference gray scale in the white insertion time and to display the second target gray scale in the next frame, the fourth response time being a time sum of the second response time and the third response time; when the first response time is less than or equal to the fourth response time, controlling the sub-pixel to display the second target gray scale in the next frame.

[0007] Optionally, the display device driving method further comprises: dividing the display panel and the backlight module into a plurality of display sub-regions and a plurality of backlight sub-modules, each of the display sub-regions corresponding to one of the backlight sub-modules; obtaining a ratio of the sub-pixel having the white insertion time to the total sub-pixels in the display sub-region, and synchronously outputting a backlight voltage to the matching backlight sub-module according to the ratio to positively correlate the backlight brightness of the backlight sub-module when controlling the sub-pixel to display the reference gray scale at the white insertion time.

[0008] Optionally, the display device driving method further comprises: obtaining a first starting time point of the current frame of the sub-pixel and a second starting time point of the white insertion time, and calculating a first time interval of the first starting time point and the second starting time point, and obtaining an output time point of the backlight voltage and the first starting time point, and calculating a second time interval of the first starting time point and the output time point; comparing the first time interval and the second time interval, when the first time interval and the second time interval are not equal, inserting a first delay time between the first starting time point and the second starting time point, or inserting a second delay time between the first starting time point and the output time point, so that the first time interval is equal to the second time interval.

[0009] Optionally, the inserting the white insertion time between the current frame and the next frame of the sub-pixel, and controlling the corresponding sub-pixel to display the reference gray scale in the white insertion time further comprises: obtaining a charging voltage of the sub-pixel in an initial time period of the white insertion time corresponding to the sub-pixel, and comparing the charging voltage with a preset charging voltage; when the charging voltage is greater than the preset charging voltage, increasing the driving voltage of the reference gray scale in a subsequent time period of the white insertion time of the sub-pixel or a next driving period of the sub-pixel; when the charging voltage is less than the preset charging voltage, decreasing the driving voltage of the reference gray scale in a subsequent time period of the white insertion time of the sub-pixel or a next driving period of the sub-pixel; when the charging voltage is equal to the preset charging voltage, maintaining the driving voltage of the reference gray scale corresponding to the sub-pixel.

[0010] Optionally, the controlling the sub-pixel to display the second target gray scale in the next frame further comprises: In a middle time point to an end time point of the next frame of the sub-pixel, the display device is controlled to perform black insertion display.

[0011] Optionally, the controlling the display device to perform black insertion display in a middle time point to an end time point of the next frame of the sub-pixel comprises: In a middle time point to an end time point of the next frame of the sub-pixel, the display device is controlled to perform black insertion display.

[0012] Optionally, the controlling the display device to perform black insertion display in a middle time point to an end time point of the next frame of the sub-pixel comprises: In a middle time point to an end time point of the next frame of the sub-pixel, the display device is controlled to perform black insertion display. In a middle time point to an end time point of the next frame of the sub-pixel, the display device is controlled to perform black insertion display.

[0013] Optionally, the driving method of the display device further comprises: The gray scale change and the backlight brightness change of the current frame and the next frame of the sub-pixel are obtained, and it is determined whether there is white insertion time and / or black insertion display before the next frame of the sub-pixel; When the white insertion time and / or the black insertion display exist, the backlight module or the backlight sub-module is controlled to work at a first backlight voltage for display work at the end of the white insertion time or the end of the black insertion display, and the backlight module or the backlight sub-module is controlled to work at a second backlight voltage for display work after a preset time period, the first backlight voltage being greater than the second backlight voltage.

[0014] Optionally, the sub-pixel comprises a red sub-pixel, a blue sub-pixel and a green sub-pixel. The driving method of the display device further comprises: Before obtaining the first target gray scale of the current frame and the second target gray scale of the next frame of each sub-pixel, the deflection response time of the red sub-pixel, the blue sub-pixel and the green sub-pixel at the same gray scale is obtained, and the driving voltage corresponding to the reference gray scale of each sub-pixel is obtained by table lookup according to the respective deflection response time, the driving voltage corresponding to the sub-pixel being positively correlated with the deflection response time. In the white insertion time corresponding to the sub-pixel, the driving voltage corresponding to the sub-pixel is output to the matched sub-pixel, so that the sub-pixel displays the reference gray scale.

[0015] The second aspect of the embodiment of the present application provides a display device, comprising a display panel, a backlight module and a driving circuit, the display panel comprises a plurality of sub-pixels arranged in an array; The driving circuit comprises: The driving circuit of the display panel is connected with the display panel, and is used for controlling the display panel to display a corresponding gray scale according to a panel driving signal; The backlight driving circuit is connected with the backlight module, and is used for controlling the backlight module to display a corresponding brightness according to a backlight adjusting signal; The controller is connected with the driving circuit of the display panel and the backlight driving circuit respectively, and the controller is used for outputting the panel driving signal and the backlight adjusting signal to execute the driving method of the display device.

[0016] The beneficial effects of the embodiment of the present application compared with the prior art are as follows: in the driving method of the display device, the first target gray scale of the current frame and the second target gray scale of the next frame of the sub-pixel are obtained, and the first response time of the sub-pixel changing from the first target gray scale to the second target gray scale and the fourth response time of the sub-pixel changing from the first target gray scale to the reference gray scale and from the reference gray scale to the second target gray scale are obtained by table lookup; when the first response time is greater than the fourth response time, the reference gray scale is displayed by the sub-pixel in the white insertion time, and the second target gray scale is displayed in the next frame; the reference gray scale is used as a transition gray scale to accelerate the change of the liquid crystal from the current gray scale to the second target gray scale, shorten the response time, improve the charging rate of the sub-pixel and the display effect of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The first structural schematic diagram of the display device provided by the embodiment one and the embodiment eight is provided. Figure 2 The first structural schematic diagram of the display panel provided by the embodiment one is provided. Figure 3 The flowchart of the driving method of the display device provided by the embodiment one is provided. Figure 4 The gray scale change schematic diagram in the driving method of the display device provided by the embodiment one is provided. Figure 5 The flowchart of the driving method of the display device provided by the embodiment two is provided. Figure 6 The first structural schematic diagram of the display panel provided by the embodiment two is provided. Figure 7 This is a schematic diagram of the first structure of the backlight module provided in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of a second structure of the display panel provided in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of a second structure of the backlight module provided in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of a third structure of the display panel provided in Embodiment 2 of the present invention; Figure 11 This is a schematic diagram of a third structure of the backlight module provided in Embodiment 2 of the present invention; Figure 12 This is a flowchart illustrating the driving method for the display device provided in Embodiment 3 of the present invention; Figure 13 This is a schematic diagram of the signal timing of the driving method for the display device provided in Embodiment 3 of the present invention; Figure 14 This is a flowchart illustrating the driving method for the display device provided in Embodiment 4 of the present invention; Figure 15 This is a first grayscale schematic diagram of the driving method for the display device provided in Embodiment 5 of the present invention; Figure 16 This is a first schematic diagram of the backlight voltage of the driving method for the display device provided in Embodiment 5 of the present invention; Figure 17 This is a schematic diagram of the grayscale and backlight voltage grayscale of the driving method for the display device provided in Embodiment 5 of the present invention; Figure 18 This is a second schematic diagram of the backlight voltage of the driving method for the display device provided in Embodiment 5 of the present invention; Figure 19 This is a flowchart illustrating the driving method for the display device provided in Embodiment Six of the present invention; Figure 20 This is a schematic diagram of the grayscale and backlight voltage of the driving method for the display device provided in Embodiment Six of the present invention; Figure 21 This is a flowchart illustrating the driving method for the display device provided in Embodiment 7 of the present invention; Figure 22 This is a schematic diagram of the driving voltage for the driving method of the display device provided in Embodiment 7 of the present invention; Figure 23 This is a schematic diagram of a second structure of the display device provided in Embodiment 8 of the present invention; Figure 24 This is a schematic diagram of the backlight driving circuit provided in Embodiment 8 of the present invention; Figure 25A structural schematic diagram of a backlight driving unit provided for the eighth embodiment of the present application is shown in Figure 8; Figure 26 A third structural schematic diagram of a display device provided for the eighth embodiment of the present application is shown in Figure 9; Figure 27 A structural schematic diagram of a source driving circuit provided for the eighth embodiment of the present application is shown in Figure 10.

[0018] In the drawings, various reference numerals are used throughout the drawings. As used in the description of the drawings, the following nomenclature applies: 100, display panel; 200, backlight module; 300, driving circuit; 310, driving circuit of the display panel; 320, backlight driving circuit; 330, controller; 340, first delay circuit; 350, second delay circuit; 301, source driving chip; 302, voltage sensing unit; 303, comparator; 31, driving chip; 32, voltage output circuit; 321, backlight driving unit; 110, display sub-region; 210, backlight sub-module; 10, sub-pixel; R1, first resistor; R2, second resistor; C1, capacitor; Q1, switch tube; LED, backlight source; Da, driving voltage; Ld, backlight voltage; STV, frame start signal; Clk, clock signal; T1, current frame; T2, next frame; T3, next next frame; T12, white insertion time; T21, front time of the next frame; T22, one of the intermediate time points to the end time point of the next frame; V1, first backlight voltage; V2, second backlight voltage. DETAILED DESCRIPTION

[0019] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0020] The terms "first", "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0021] Embodiment One A first aspect of the embodiments of the present application proposes a driving method of a display device, as shown in Figure 1. Figure 1 As shown in Figure 1, the display device includes a display panel 100 and a backlight module 200, as shown in Figure 2. Figure 2As shown, the display panel 100 includes multiple sub-pixels 10 arranged in an array. The display panel also includes multiple rows of data lines S1~Sm and multiple scan lines G1~Gn. The display device may also include a corresponding driving circuit 300. The driving circuit 300 is used to provide a corresponding driving voltage Da and a backlight voltage Ld. When the backlight module 200 receives the backlight voltage Ld, it provides backlight to the display panel 100. When the sub-pixels 10 of the display panel 100 receive a driving voltage Da of a corresponding magnitude, they display the corresponding grayscale.

[0022] like Figure 3 As shown, in order to improve the response speed of the liquid crystal and shorten the response time, the driving method of the display device in this embodiment includes: S10. Obtain the first target gray level of the current frame T1 and the second target gray level of the next frame T2 for each sub-pixel 10. When the first target gray level and the second target gray level are different, look up the table to obtain the first response time of each sub-pixel 10 from the first target gray level to the second target gray level, and look up the table to obtain the second response time of the sub-pixel 10 from the first target gray level to the reference gray level and the third response time from the reference gray level to the second target gray level.

[0023] In this embodiment, when driving each sub-pixel 10 to display its corresponding first target grayscale, the second target grayscale corresponding to the next frame T2 of each sub-pixel 10 is obtained synchronously, and it is determined whether the first target grayscale and the second target grayscale are consistent. When the first target grayscale and the second target grayscale are the same, when switching to the next frame T2, the driving voltage Da of the corresponding size is maintained, and the sub-pixel 10 is controlled to display the second target grayscale of the same grayscale.

[0024] As shown in Table 1 below, the response time for different grayscale switching of the corresponding driving circuit 300 or the pre-stored sub-pixel 10 in the register is as follows: for example, when switching from grayscale 0 to grayscale 16, the response time is 5.95ms, and when switching from grayscale 255 to grayscale 96, the response time is 8.28ms.

[0025] When the first target grayscale of the current frame T1 of sub-pixel 10 is different from the target grayscale of the next frame T2, the first response time of the sub-pixel 10 changing from the first target grayscale of the current frame T1 to the second target grayscale is obtained by looking up a table. At the same time, the second response time of the sub-pixel 10 changing from the first target grayscale to the reference grayscale is obtained, and the third response time of the sub-pixel 10 changing from the reference grayscale to the second target grayscale is obtained. The reference grayscale can be selected from corresponding grayscales, such as 224 grayscale, 240 grayscale, 250 grayscale, etc. In an optional embodiment, the reference grayscale is 255 grayscale. The larger the grayscale, the larger the driving voltage Da received by the sub-pixel 10, the faster the deflection response time, and the shorter the response time.

[0026] For example, assuming the first target gray level is 80 gray levels, the second target gray level is 160 gray levels, and the reference gray level is 255 gray levels, by looking up the response time table, we can find that the first response time is 15.04ms, the second response time is 4.9ms, and the third response time is 7.51ms. Correspondingly, the total time for the first target gray level to transition through the reference gray level is 12.41ms.

[0027] Table 1

[0028] S20. When the first response time is greater than the fourth response time, a white-insertion time T12 is inserted between the current frame T1 and the next frame T2 of sub-pixel 10, and the corresponding sub-pixel 10 is controlled to display the reference gray level within the white-insertion time T12 and the second target gray level within the next frame T2. The fourth response time is the sum of the second response time and the third response time.

[0029] S30. When the first response time is less than or equal to the fourth response time, control sub-pixel 10 to display the second target grayscale in the next frame T2.

[0030] Having determined the first and fourth response times, where the fourth response time is the sum of the second and third response times (i.e., the total time for the first target grayscale to transition from the reference grayscale), a comparison is made between the first and fourth response times. If the first response time is greater than the fourth response time, it indicates that the response time for a direct transition from the first target grayscale to the second target grayscale is too long. To shorten the response time, as follows... Figure 4 As shown, a white-filling time T12 is inserted between the current frame T1 and the next frame T2 of sub-pixel 10. During the white-filling time T12, sub-pixel 10 is controlled to display a reference grayscale, and during the time of the next frame T2, sub-pixel 10 is controlled to display a second target grayscale. For sub-pixel 10, it jumps from the first target grayscale to the reference grayscale in the current frame T1, and then jumps from the reference grayscale to the second target grayscale, which accelerates the transition of the liquid crystal from the first target grayscale to the second target grayscale. The total response time is shortened, thereby improving the charging rate of sub-pixel 10 and the display effect of the bar display panel 100.

[0031] When the first response time is less than or equal to the fourth response time, it indicates that inserting the white interpolation time T12 and increasing the display reference gray level cannot shorten the response time, that is, it cannot speed up the gray level transition of the liquid crystal. At this time, it is selected not to insert the white interpolation time T12 between the current frame T1 and the next frame T2, and after the current frame T1 ends, the sub-pixel 10 is directly controlled to display the second target gray level.

[0032] The beneficial effects of the embodiment of the present application compared with the prior art are: in the driving method of the display device, the first target gray scale of the current frame T1 of the sub-pixel 10 and the second target gray scale of the next frame T2 are obtained, and the first response time of the sub-pixel 10 from the first target gray scale to the second target gray scale and the fourth response time of the sub-pixel 10 from the first target gray scale to the reference gray scale and from the reference gray scale to the second target gray scale are obtained by table lookup; when the first response time is greater than the fourth response time, the sub-pixel 10 is controlled to display the reference gray scale within the white insertion time T12, and the second target gray scale in the next frame T2; the reference gray scale is used as a transition gray scale to accelerate the transition of the liquid crystal from the current gray scale to the second target gray scale, shorten the response time, improve the charging rate of the sub-pixel 10 and the display effect of the display panel 100.

[0033] Embodiment two Because when the reference gray scale is inserted, the first target gray scale jumps to the second target gray scale, there is a fast response speed, and the corresponding sub-pixel 10 and display panel 100 flicker, in order to avoid the flicker caused by the white insertion time T12 being observed, in an optional embodiment, as shown in Figure 5 The driving method of the display device further comprises: S40, the display panel 100 and the backlight module 200 are divided into a plurality of display sub-regions 110 and a plurality of backlight sub-modules 210, each display sub-region 110 corresponds to a backlight sub-module 210; S50, the ratio of the sub-pixel 10 with the white insertion time T12 in each display sub-region 110 to the total sub-pixel 10 in the display sub-region 110 is obtained, and when the sub-pixel 10 displays the reference gray scale in the white insertion time T12, the backlight voltage Ld is output to the matched backlight sub-module 210 in synchronization according to the ratio, so as to positively adjust the backlight brightness of the backlight sub-module 210.

[0034] In this embodiment, as shown in Figure 6 and Figure 7 The display panel 100 can be divided into a plurality of display sub-regions 110, and the backlight module 200 can be divided into a plurality of backlight sub-modules 210, the display sub-region 110 includes a plurality of sub-pixels 10, and the backlight sub-module 210 receives the backlight voltage Ld and generates backlight with corresponding brightness.

[0035] When different display sub-regions 110 of the display panel 100 display different images, the first target grayscale and the second target grayscale of each sub-pixel 10 in the display sub-region 110 are obtained. The response time table is consulted to determine whether each sub-pixel 10 in each display sub-region 110 has an interpolation time T12. The number of sub-pixels 10 in each display sub-region 110 with interpolation time T12 is counted, and the number of sub-pixels 10 with interpolation time T12 is compared with the total number of sub-pixels 10 in the display sub-region 110 to determine which sub-pixels 10 have interpolation time T12. The ratio is used to determine the required backlight brightness corresponding to the white insertion time T12. The smaller the ratio, the more likely that only a few sub-pixels 10 in the current display sub-region 110 have the white insertion time T12 and the display reference gray level inserted. These sub-pixels 10 are sparsely distributed in the display sub-region 110. The human eye is not sensitive to local and small-scale brightness changes. Especially when these brightness changes are integrated with the image content, they are almost imperceptible. At this time, controlling the brightness of the backlight sub-module 210 corresponding to the display sub-region 110 to reduce or turn off will not cause overall discomfort and will reduce screen flicker.

[0036] like Figure 8 As shown, when the ratio of the display sub-region 110 in the first row and first column is less than 10%, the sub-pixels 10 are sparsely distributed in the display sub-region 110. The human eye is not sensitive to localized, small-scale brightness changes, such as... Figure 9 As shown, at this time, the backlight brightness of the corresponding backlight sub-module 210 in the first row and first column of the backlight module 200 is turned off, which will not cause overall discomfort and reduces screen flicker.

[0037] Similarly, as Figure 10 As shown, the larger the ratio, the more sub-pixels 10 with an insertion time T12 are inserted into the current display sub-region 110. Most of the backlight sub-modules 210 of the backlight module 200 need to operate synchronously in a very short time. The human eye is extremely sensitive to global, large-scale brightness changes. If the brightness of the entire display panel 100 cycles rapidly between "100% -> 0% -> 100%", this will produce very obvious and uncomfortable global flicker. The negative impact of this flicker is far greater than the response speed improvement brought by insertion. Therefore, as Figure 11 As shown, during the white insertion time T12, when the ratio is large, the backlight brightness is increased according to the positive correlation of the ratio. For example, the backlight brightness is adjusted to 10%, and the brightness of the corresponding backlight sub-module 210 is smoothly switched between "100%->10%->100%", reducing the brightness drop. What the human eye perceives is no longer a flickering screen, but a slight brightness fluctuation that is not easily noticeable, thus improving visual comfort.

[0038] The ratio and the backlight brightness positively change, which can positively change in proportion, or each ratio corresponds to a brightness area threshold, or a ratio interval corresponds to a backlight brightness.

[0039] For example, as shown in Table 2, R represents the ratio, and one ratio interval corresponds to a percentage of the backlight brightness. The larger the ratio, the larger the backlight brightness.

[0040] Table 2

[0041] When the white insertion time T12 of the sub-pixel 10, the ratio of the display sub-area 110, and the corresponding backlight brightness of the backlight sub-module 210 are determined, the corresponding size of the driving voltage Da is output to the display panel 100 and the backlight voltage Ld is output to the backlight module 200 within the white insertion time T12, so as to realize fast change response of the display picture and reduce picture flicker, and improve visual comfort.

[0042] Embodiment Three On the basis of Embodiment Two, the brightness of the backlight sub-module 210 corresponding to the display sub-area 110 needs to be adjusted within the white insertion time T12, and the driving voltage Da and the backlight voltage Ld need to be kept time-synchronized, so as to reduce the flicker or picture abnormality of the display panel 100. For this purpose, in an optional embodiment, as shown in Figure 12 The driving method of the display device further comprises: S60, obtaining the first starting time point of the current frame T1 of the sub-pixel 10 and the second starting time point of the white insertion time T12, and calculating the first time interval TD of the first starting time point and the second starting time point, and obtaining the first starting time point and the output time point of the backlight voltage Ld, and calculating the second time interval Te of the first starting time point and the output time point; S70, comparing the size of the first time interval TD and the second time interval Te, when the first time interval TD and the second time interval Te are not equal, inserting a first delay time between the first starting time point and the second starting time point, or inserting a second delay time between the first starting time point and the output time point, so that the first time interval TD is equal to the second time interval Te.

[0043] In this embodiment, the corresponding driving circuit 300 has a frame starting signal STV for controlling frame scanning, and a clock signal Clk. The driving circuit 300 outputs the corresponding timing driving voltage Da to the display panel 100 according to the frame starting signal STV and the clock signal Clk.

[0044] In order to realize the synchronous output of the driving voltage Da and the backlight voltage Ld, the second starting time point of the driving voltage Da corresponding to the reference gray scale of the insertion white time T12 and the output time point of the backlight voltage Ld are also acquired synchronously, and the first time interval TD from the frame starting signal STV to the second starting time point of the driving voltage Da of the reference gray scale is calculated, and the second time interval Te from the frame starting signal STV to the output time point of the backlight voltage Ld is calculated.

[0045] As shown in Figure 13 , the first time interval TD and the second time interval Te are compared, and when the first time interval TD is not equal to the second time interval Te, it indicates that there is a delay between the insertion white time T12 and the change of the backlight brightness, at this time, a first delay time is inserted between the first starting time point and the second starting time point, or a second delay time is inserted between the first starting time point and the output time point, so that the first time interval TD is equal to the second time interval Te, ensuring that the insertion white time T12 and the corresponding reference gray scale and the backlight voltage Ld are output synchronously, and the display effect is improved.

[0046] For example, assuming that the first time interval TD is greater than the second time interval Te, a second delay time is inserted between the first starting time point and the output time point, and the output of the backlight voltage Ld is delayed, or assuming that the first time interval TD is less than the second time interval Te, a first delay time is inserted between the first starting time point and the second starting time point, and the insertion of the insertion white time T12 is delayed, so that the insertion white time T12 and the corresponding reference gray scale and the backlight voltage Ld are output synchronously, and the display effect is improved.

[0047] Embodiment Four In the display panel 100, the sub-pixel 10 includes a liquid crystal capacitor and a storage capacitor, and the liquid crystal capacitor and the storage capacitor will change with the voltage and temperature, causing the fixed driving voltage Da to be insufficiently charged or overcharged in certain cases, affecting the display effect or increasing the power consumption. In order to avoid the situation that the insufficient charging of the driving voltage Da of the insertion white time T12 causes incomplete liquid crystal turning, affecting the insertion white effect, or additional power consumption and unnecessary stress on the liquid crystal due to overcharging.

[0048] As shown in Figure 14 , S20 further includes: S31, acquiring the charging voltage of the sub-pixel 10 in the initial time period of the insertion white time T12 corresponding to the sub-pixel 10, and comparing the charging voltage with the preset charging voltage; S32, when the charging voltage is greater than the preset charging voltage, increasing the driving voltage Da of the reference gray scale in the subsequent time period of the insertion white time T12 of the sub-pixel 10 or in the next driving period of the sub-pixel 10; S33, when the charging voltage is less than the preset charging voltage, reducing the driving voltage Da of the reference gray scale in the subsequent time period of the white insertion time T12 of the sub-pixel 10 or in the next driving period of the sub-pixel 10; S34, when the charging voltage is equal to the preset charging voltage, maintaining the driving voltage Da of the reference gray scale corresponding to the sub-pixel 10.

[0049] In this embodiment, a plurality of voltage sensing units 302 can be integrated in the display panel 100 or in the driving circuit 300. The voltage sensing unit 302 can sense the charging rate of the sub-pixel 10 in the initial period of the white insertion time T12, that is, the charging change value of the sub-pixel 10, and obtain the charging voltage after the initial period, for example, sensing the charging rate of the sub-pixel 10 in the first half of the white insertion time T12, and calculating the charging voltage, and comparing the charging voltage with the preset charging voltage, so as to determine whether the sub-pixel 10 is undercharged or overcharged in the white insertion time T12.

[0050] For example, in the period of 0.2ms after the start of the white insertion time T12, it is detected whether the driving voltage Da of the sub-pixel 10 reaches 50% of the driving voltage Da corresponding to the reference gray scale, so as to determine whether the sub-pixel 10 is undercharged or overcharged.

[0051] When it is detected that the charging voltage is less than the preset charging voltage, it indicates that the current charging speed is too slow, and there is a problem of undercharging. At this time, a first comparison signal is obtained by comparison, and according to the first comparison signal, the size of the driving voltage Da of the next white insertion time T12 or the size of the driving voltage Da of the subsequent time of the current white insertion time T12 can be increased, so as to increase the charging rate of the sub-pixel 10 and ensure the charging efficiency.

[0052] When it is detected that the charging voltage is greater than the preset charging voltage, it indicates that the current charging speed is too fast, and there is a possibility of overcharging. At this time, a second comparison signal is obtained by comparison, and according to the second comparison signal, the size of the driving voltage Da of the next white insertion time T12 or the size of the driving voltage Da of the subsequent time of the current white insertion time T12 can be reduced, so as to reduce the charging rate of the sub-pixel 10 and ensure the charging efficiency.

[0053] When it is detected that the charging voltage is equal to the preset charging voltage, it indicates that the current charging speed meets the requirements, and there is no overcharging or undercharging. At this time, a third comparison signal is obtained by comparison, and according to the third comparison signal, the size of the driving voltage Da of the next white insertion time T12 or the size of the driving voltage Da of the subsequent time of the current white insertion time T12 can be maintained, so as to maintain the charging rate of the sub-pixel 10 and ensure the charging efficiency.

[0054] Embodiment five After shortening the liquid crystal's response time by inserting a white interpolation time T12, the liquid crystal instantly completes the response. When rapidly switching to display the second target grayscale of the next frame T2, the image corresponding to the first target grayscale of the previous frame will continue to be displayed on the display panel 100 for a period of time, causing a blurring sensation when the human eye tracks moving objects. This is due to the persistence of vision effect. After the light signal's visual effect on the human eye ends, the visual image does not disappear immediately but remains for a very short time. To solve the blurring problem and achieve persistence of vision reset, in an optional embodiment, controlling the sub-pixel 10 to display the second target grayscale in the next frame T2 further includes: S80, between one of the intermediate time points and the end time point of the next frame T2 of sub-pixel 10, control the display device to perform black insertion display.

[0055] In this embodiment, after switching to the next frame T2 and displaying the second target grayscale for a period of time, black screen display control is performed, that is, the display screen is controlled to display a black screen between one of the intermediate time points and the end time point T22 of the next frame T2, thereby interrupting the image residue caused by the previous frame and realizing the persistence of vision reset of the human eye.

[0056] like Figure 15 As shown, in the current frame T1, sub-pixel 10 is controlled to display the first target grayscale. During the white insertion time T12, sub-pixel 10 is controlled to display the reference grayscale. During the period T21 before the next frame T2, sub-pixel 10 is controlled to display the second target grayscale. Between one of the intermediate time points and the end time point T22 of the next frame T2, the display device is controlled to display a black screen. After displaying the black screen, when switching to the next frame T3, sub-pixel 10 is controlled to display another target grayscale.

[0057] As shown in Table 3 below, the duration of black-out display can be adjusted according to different usage scenarios. The time period from switching to the second target grayscale to one of the intermediate time points is set as T21, and the time period from the intermediate time point to the end time point is T22. The higher the proportion of T21, such as 70%, the longer the backlight module 200 is on, the smaller the overall screen brightness loss, the shorter the dark interval, and the less drastic the brightness fluctuation. The human eye is not easily able to perceive flicker, but the persistence of vision is more obvious, which reduces the improvement effect on motion blur. This scenario is suitable for HDR games or movies with high brightness requirements, as well as users who are sensitive to flicker.

[0058] When the duty cycle of T21 is low, such as 30%, the black screen is displayed for a long time, resetting the persistence of vision. However, the backlight module 200 has a short backlight turn-on time, resulting in a decrease in brightness. The alternation between bright images and long periods of black screen can be perceived as noticeable flicker by the human eye. This scenario is suitable for use in competitive game modes.

[0059] Similarly, when the display device works in the normal standard mode, the display device can be controlled not to perform the black insertion display, and the display device can be suitable for daily use scenarios.

[0060] When the display device works in the closed mode, i.e., the display device displays a static picture, the display device can not need to perform the white insertion time T12 insertion and the black insertion display, and the display device can be suitable for scenarios of static picture and film appreciation.

[0061] Table 3

[0062] In the embodiment, the control of the display device to perform the black insertion display can be performed by setting the gray scale of the corresponding sub-pixel 10 or changing the backlight brightness. In an optional embodiment, S80 includes the following steps. S81, between one of the intermediate time points and the end time point of the next frame T2 of the sub-pixel 10, the corresponding sub-pixel 10 is controlled to display the minimum gray scale.

[0063] In the embodiment, as shown in the figure, during the T22 time period, the corresponding sub-pixel 10 is controlled to display the minimum gray scale. In an optional embodiment, the minimum gray scale is 0 gray scale. When the sub-pixel 10 displays the 0 gray scale, the sub-pixel 10 is basically not deflected, the display panel 100 has no light emission, the display panel 100 at the position of the corresponding sub-pixel 10 displays a black picture, and the black insertion display is realized. Figure 15

[0064] In another optional embodiment, S80 includes the following steps. S82, the sub-pixel 10 is controlled to display the second target gray scale in the next frame T2, and the voltage of the backlight voltage Ld is adjusted to reduce or extinguish the brightness of the backlight sub-module 210 between one of the intermediate time points and the end time point of the next frame T2 of the sub-pixel 10.

[0065] In the embodiment, as shown in the figure, during the time period of the next frame T2, the gray scale of the sub-pixel 10 is not switched, i.e., the sub-pixel is controlled to maintain the display of the second target gray scale in the next frame T2, and the brightness of the backlight module 200 is controlled to be reduced or extinguished, so as to present the black insertion effect, avoid the problem of too long response time caused by the jump of the sub-pixel 10 from the second target gray scale to 0 gray scale and then from 0 gray scale to the second target gray scale, and thus ensure the response time and response efficiency of the sub-pixel 10, avoid the long-time flicker, and improve the display effect. Figure 16

[0066] Or, in another optional embodiment, S80 includes the following steps. ​​S83, control the sub-pixel 10 to display the second target gray scale in the next frame T2, and output the high-frequency pulse backlight voltage Ld and reduce the duty cycle of the backlight voltage Ld between one of the intermediate time points to the end time points of the next frame T2 of the sub-pixel 10 T22, so as to reduce the brightness of the backlight sub-module 210.

[0067] As shown in Figure 17 and Figure 18 In order to avoid the current impact caused by the backlight driving circuit 320 when the backlight module 200 is completely turned off and turned on, the circuit life of the backlight driving circuit 320 is affected, and at the same time, the backlight module 200 needs a certain time from complete closing to complete lighting. The delay may cause the backlight adjustment signal and the driving voltage Da to be unable to output synchronously, thereby generating a weak residual image or insufficient brightness at the edge of frame switching.

[0068] When performing the black insertion display, the high-frequency pulse backlight adjustment signal is output to the backlight driving circuit 320, so that the backlight driving circuit 320 outputs the high-frequency pulse backlight voltage Ld. The width of a single pulse of the high-frequency pulse backlight voltage Ld is short, and in the entire black insertion display time, the high-frequency pulse backlight voltage Ld controls the backlight module 200 to generate multiple pulse brightnesses. The pulse brightness is high in frequency and the human eye cannot perceive flicker, and only an average brightness can be integrated, which is lower than the brightness during normal display, thereby realizing the black insertion effect visually. The duty cycle of the high-frequency pulse can be set according to the display mode. For example, when pursuing extreme motion clarity, the duty cycle is set to 1%, at which time, a very black picture is displayed. When the brightness priority mode is used, the duty cycle of the high-frequency pulse can be set to 5%, at which time, a gray-black picture is displayed.

[0069] In an optional embodiment, when the brightness of the backlight sub-module 210 is reduced during the white insertion time T12, the high-frequency pulse backlight voltage Ld can also be output, so as to reduce the backlight brightness of the backlight sub-module 210 during the white insertion time T12.

[0070] Embodiment six When the display picture of the display panel 100 is switched from the white insertion time T12 or the black insertion to a normal gray scale, at this time, the backlight module 200 needs to provide a normal backlight brightness, that is, the backlight brightness increases. Due to the priority of the response speed of the backlight driving circuit 320 and the small delay of the backlight brightness of the backlight source LED, the brightness of the backlight module 200 cannot reach the target value instantaneously within several frames at the beginning of the white insertion time T12 or the black insertion time, thereby causing insufficient brightness.

[0071] In order to solve the problem, in an optional embodiment, as shown in Figure 19 The driving method of the display device further includes: S90, obtain the gray scale change and the backlight brightness change of the current frame T1 and the next frame T2 of the sub-pixel 10, and determine whether there is a white insertion time T12 and / or black insertion display before the next frame T2 of the sub-pixel 10; S100, when there is a white insertion time T12 and / or black insertion display, at the end of the white insertion time T12 or the end of the black insertion display, control the corresponding backlight module 200 or backlight sub-module 210 to work at the first backlight voltage V1 for display work, and after a preset time period, control the corresponding backlight module 200 or backlight sub-module 210 to work at the second backlight voltage V2 for display work. The first backlight voltage V1 is greater than the second backlight voltage V2.

[0072] In this embodiment, when processing the data of the current frame T1, the next frame T2 image data and the size of the backlight voltage Ld of the backlight module 200 are analyzed in advance, so as to determine the white insertion time T12 and the black insertion time.

[0073] When the target gray scale of the current frame T1 and the next frame T2 is detected to be different, or the input voltage of the backlight module 200 is rapidly reduced, it is determined that the next frame T2 will occur white insertion or black insertion. Before the end of the display period of the current frame T1 or before the backlight voltage Ld is reduced, a backlight adjustment signal is output to control the backlight driving circuit 320 to realize pre-boosting of the backlight voltage Ld, as shown in the figure. Figure 20 The backlight driving circuit 320 outputs the first backlight voltage V1 to the backlight module 200 at the end of the white insertion time T12 or the end of the black insertion time of the next frame T2, so as to realize overdrive of the backlight module 200, so that the brightness of the backlight module 200 reaches the target brightness faster, and after a preset time period, the driving voltage Da of the backlight module 200 is switched to the second backlight voltage V2, and the backlight module 200 is controlled to display the normal target brightness.

[0074] Embodiment seven The display panel 100 includes arrayed sub-pixels 10, and the sub-pixels 10 include red sub-pixels, blue sub-pixels and green sub-pixels. When the reference gray scale is displayed by the sub-pixels 10 at the white insertion time T12, due to the different response characteristics of the liquid crystal materials corresponding to the red sub-pixels, the blue sub-pixels and the green sub-pixels, applying the same driving voltage Da will cause the rotation speed of one or more sub-pixels 10 to be unmatched, and then different gray scales are displayed, the reference gray scale cannot be reached at the same time, and the boundary color deviation is caused.

[0075] Therefore, in order to solve the problem, in an optional embodiment, as shown in the figure, the driving method of the display device further includes: Figure 21 ​S110. Before acquiring the first target grayscale of the current frame T1 and the second target grayscale of the next frame T2 for each sub-pixel 10, the deflection response time of the red sub-pixel, blue sub-pixel and green sub-pixel at the same grayscale is acquired, and the driving voltage Da of each sub-pixel 10 corresponding to the reference grayscale is obtained by looking up the table according to their respective deflection response time. The driving voltage Da of the corresponding sub-pixel 10 changes positively with the deflection response time. S120. During the white insertion time T12 of the corresponding sub-pixel 10, output the corresponding driving voltage Da to the matched sub-pixel 10 so that the corresponding sub-pixel 10 displays the reference grayscale.

[0076] In this embodiment, before the display panel 100 is displayed, the driving voltage Da of the corresponding gray level can be output to the three sub-pixels 10, and the deflection response time of each sub-pixel 10 can be obtained. Based on the deflection response time, a test table of the independent response time of the three sub-pixels 10 when switching at different gray levels is established, as shown in Tables 4 to 6. Table 4 shows the test table of the response time of the red sub-pixel, Table 5 shows the test table of the response time of the green sub-pixel, and Table 6 shows the test table of the response time of the blue sub-pixel. Based on the response time, the target driving voltage Da required to reach the reference gray level can be determined.

[0077] like Figure 22 As shown, the positive grayscale voltage for the red sub-pixel to reach the reference grayscale is V71 and the negative grayscale voltage is V72. The positive grayscale voltage for the green sub-pixel to reach the reference grayscale is V61 and the negative grayscale voltage is V62. The positive grayscale voltage for the blue sub-pixel to reach the reference grayscale is V51 and the negative grayscale voltage is V52. V71 is greater than V61, V61 is greater than V51, V52 is greater than V62, and V62 is greater than V72.

[0078] After determining the target driving voltage Da required for different sub-pixels 10 to display the reference grayscale, the target driving voltage Da of the corresponding size is output to the matching sub-pixels 10 at the white insertion time T12, so that each sub-pixel 10 can display the reference grayscale simultaneously, reduce color shift, and improve the display effect.

[0079] Table 4

[0080] Table 5

[0081] Table 6

[0082] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0083] Embodiment eight Corresponding to the driving method of the display device, the second aspect of the embodiment of the present application proposes a display device, as shown in Figure 1 The display device includes a display panel 100, a backlight module 200 and a driving circuit 300, the display panel 100 includes a plurality of sub-pixels 10 arranged in an array, the driving circuit 300 is used to provide corresponding driving voltage Da and backlight voltage Ld, the backlight module 200 provides backlight towards the display panel 100 when receiving the backlight voltage Ld, and the sub-pixel 10 of the display panel 100 displays the corresponding gray scale when receiving the driving voltage Da of the corresponding size.

[0084] As shown in Figure 23 The driving circuit 300 includes: The driving circuit 310 of the display panel is connected with the display panel 100, and is used to control the display panel 100 to display the corresponding gray scale according to the panel driving signal; The backlight driving circuit 320 is connected with the backlight module 200, and is used to control the backlight module 200 to display the corresponding brightness according to the backlight adjusting signal; The controller 330 is connected with the driving circuit 310 of the display panel and the backlight driving circuit 320 respectively, and the controller 330 is used to output the panel driving signal and the backlight adjusting signal to execute the driving method of the display device above.

[0085] In the embodiment, when the controller 330 outputs the panel driving signal to the driving circuit 310 of the display panel, the driving circuit 310 of the display panel outputs the driving voltage Da of the corresponding size to the display panel 100, and when the backlight adjusting signal is received, the backlight driving circuit 320 outputs the backlight voltage Ld of the corresponding size to the backlight module 200, the controller 330 judges whether to perform the white insertion processing and the black insertion processing by acquiring the first target gray scale of the current frame T1 and the target gray scale of the next frame T2, and outputs the panel driving signal and the backlight adjusting signal of the corresponding size according to the insertion situation of the white insertion and the black insertion, so as to control the display panel 100 to display the corresponding first target gray scale, reference gray scale and second target gray scale through the driving circuit 310 of the display panel, and control the backlight module 200 to present the corresponding backlight brightness through the backlight driving circuit 320.

[0086] At the same time, when the display panel 100 and the backlight module 200 are partitioned into a plurality of display sub-regions 110 and backlight sub-modules 210, in order to realize the independent control of the backlight sub-modules 210, as shown in Figure 24As shown, the backlight driving circuit 320 comprises a plurality of backlight driving units 321, each backlight driving unit 321 corresponding to a backlight sub-module 210, the backlight driving unit 321 receiving the backlight adjusting signal and controlling the backlight sub-module 210 to display corresponding brightness.

[0087] The backlight driving unit 321 can comprise a corresponding conversion circuit, such as Figure 25 As shown, in an optional embodiment, the backlight driving unit 321 comprises a driving chip 31, a voltage output circuit 32, a switch tube Q1, a first resistor R1, a second resistor R2 and a capacitor C1, the output end of the voltage output circuit 32, the backlight source LED of the backlight module 200, the switch tube Q1 and the second resistor R2 forming a series loop, the first port of the driving chip 31 being connected with the control end of the voltage output circuit 32, the second port of the driving chip 31 being connected to the control end of the switch tube Q1 through the first resistor R1, the driving chip 31 receiving the backlight adjusting signal output by the controller 330, the backlight adjusting signal being a pulse width modulation signal, the driving chip 31 converting the backlight adjusting signal into a backlight driving signal after signal amplification, the backlight driving signal being output to the switch tube Q1, a conversion output driving voltage Da being output to the backlight source LED of the backlight module 200, so as to control the backlight source LED to present corresponding backlight brightness.

[0088] The third port of the driving chip 31 is connected with the second resistor R2 and collects the driving current of the backlight source LED by collecting the end voltage of the second resistor R2, and performs negative feedback comparison on the driving current, so as to realize constant current control of the backlight source LED, thereby ensuring uniform brightness of the backlight source LED, and the capacitor C1 forms a filter circuit to filter high-frequency noise in the backlight driving unit 321.

[0089] In this embodiment, in order to realize synchronous output of the driving voltage Da and the backlight voltage Ld, as shown, Figure 26 As shown, the driving circuit 300 further comprises a first delay circuit 340 and a second delay circuit 350, the first delay circuit 340 being connected between the controller 330 and the driving circuit 310 of the display panel, and the second delay circuit 350 being connected between the controller 330 and the backlight driving circuit 320.

[0090] The controller 330 synchronously acquires the second starting time point of the driving voltage Da corresponding to the reference gray scale of the white insertion time T12, and the output time point of the backlight voltage Ld of the white insertion time T12, and calculates the first time interval TD from the frame starting signal STV to the second starting time point of the driving voltage Da of the reference gray scale, and calculates the second time interval Te from the frame starting signal STV to the output time point of the backlight voltage Ld.

[0091] The controller 330 compares the magnitudes of the first time interval TD and the second time interval Te. When the first time interval TD and the second time interval Te are not equal, it indicates that there is a delay between the white insertion time T12 and the backlight brightness change. At this time, the first delay circuit 340 or the second delay circuit 350 is activated to insert a first delay time between the first start time point and the second start time point, or to insert a second delay time between the first start time point and the output time point, so that the first time interval TD is equal to the second time interval Te, ensuring that the white insertion time T12 and the corresponding reference gray level and backlight voltage Ld are output synchronously, thereby improving the display effect.

[0092] For example, assuming the first time interval TD is greater than the second time interval Te, the second delay circuit 350 is controlled to work, and a second delay time is inserted between the first start time point and the output time point to delay the output of the backlight voltage Ld.

[0093] And when the first time interval TD is less than the second time interval Te, the first delay circuit 340 is controlled to start working, and a first delay time is inserted between the first start time point and the second start time point to delay the insertion of the white insertion time T12, thereby ensuring that the white insertion time T12 and the corresponding reference gray level and backlight voltage Ld are output synchronously, and improving the display effect.

[0094] The first delay circuit 340 and the second delay circuit 350 can be configured as registers, and the number of clock cycles for the delay time can be controlled by the registers to achieve delay adjustment.

[0095] The driving circuit 310 of the display panel may include a corresponding source driving circuit 311 and a gate driving circuit. The source driving circuit 311 is connected to the data line of the display panel 100 and is used to output a driving voltage Da to the sub-pixel 10 of the display panel 100. The gate driving circuit is connected to the data line of the display panel 100 and is used to output a line scanning signal to the sub-pixel 10 of the display panel 100. When the sub-pixel 10 receives the line scanning signal, it turns on line by line and displays the corresponding gray level under the drive of the driving voltage Da.

[0096] like Figure 27 As shown, the source driving circuit 311 may include multiple source driving chips 301, each of which is connected to multiple columns of sub-pixels 10 and outputs a driving voltage Da.

[0097] In the display panel 100, the sub-pixel 10 includes a pixel electrode and a common electrode, and a liquid crystal capacitor is formed between the pixel electrode and the common electrode. The liquid crystal capacitor changes with voltage and temperature, and a fixed driving voltage Da may be insufficiently charged or overcharged in certain cases, affecting the display effect or increasing power consumption. In order to avoid the situation that the insufficient charging of the driving voltage Da during the white insertion time T12 causes incomplete liquid crystal turning, affecting the white insertion effect, or the overcharging increases additional power consumption and unnecessary stress on the liquid crystal.

[0098] In the embodiment, as shown in FIG. 3, a plurality of voltage sensing units 302 can be integrated in the source driving circuit 311. Each voltage sensing unit 302 is coupled with the pixel electrode of the sub-pixel 10, and senses the charging rate of the sub-pixel 10, i.e., the charging change value of the sub-pixel 10, at the initial period of the white insertion time T12, and obtains the charging voltage after the initial period. The comparator 303 compares the charging voltage with a preset charging voltage, and outputs a comparison signal corresponding to the size to the controller 330. The controller 330 determines whether the sub-pixel 10 is insufficiently charged or overcharged during the white insertion time T12. Figure 27 For example, in a period of 0.2 ms after the start of the white insertion time T12, it is determined whether the driving voltage Da of the sub-pixel 10 reaches 50% of the driving voltage Da corresponding to the reference gray scale, so as to determine whether the sub-pixel 10 is insufficiently charged or overcharged.

[0099] When it is detected that the charging voltage is less than the preset charging voltage, it indicates that the current charging speed is too slow, and there is a problem of insufficient charging. At this time, the comparator 303 obtains a first comparison signal, and the controller 330 can increase the size of the driving voltage Da of the source driving chip 301 in the next white insertion time T12 or increase the size of the driving voltage Da in the subsequent time of the current white insertion time T12, so as to increase the charging rate of the sub-pixel 10 and ensure the charging efficiency.

[0100] When it is detected that the charging voltage is greater than the preset charging voltage, it indicates that the current charging speed is too fast, and there is a possibility of overcharging. At this time, the comparator 303 obtains a second comparison signal, and the controller 330 can decrease the size of the driving voltage Da of the source driving chip 301 in the next white insertion time T12 or decrease the size of the driving voltage Da in the subsequent time of the current white insertion time T12, so as to decrease the charging rate of the sub-pixel 10 and ensure the charging efficiency.

[0101]

[0102] ​When the charging voltage is detected to be equal to the preset charging voltage, it indicates that the current charging speed meets the requirement, and overcharging or undercharging will not occur. At this time, the comparator 303 obtains a third comparison signal, and the controller 330 maintains the size of the driving voltage Da of the source driving chip 301 at the next insertion white time T12 or the size of the driving voltage Da of the subsequent time of the current insertion white time T12 according to the third comparison signal, so as to maintain the charging speed of the sub-pixel 10 and ensure the charging efficiency.

[0103] The controller 330 can adopt a corresponding processor, register, etc. In an optional embodiment, the controller 330 is a timing controller 330 in the display device.

[0104] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents. The modifications or replacements do not change the essence of the corresponding technical solutions, and should be included in the protection scope of the present application.

Claims

1. A driving method of a display device, the display device comprising a display panel and a backlight module, the display panel comprising a plurality of sub-pixels arranged in an array, the method comprising: determining a first driving voltage and a second driving voltage for each sub-pixel in the display panel according to a first image frame and a second image frame; and driving the display panel according to the first driving voltage and the second driving voltage. The driving method of the display device comprises: obtaining a first target gray scale of a current frame and a second target gray scale of a next frame of each sub-pixel, and when the first target gray scale and the second target gray scale are different, obtaining a first response time of each sub-pixel from the first target gray scale directly changing to the second target gray scale by table lookup, and obtaining a second response time of the sub-pixel from the first target gray scale changing to a reference gray scale and a third response time of the sub-pixel from the reference gray scale changing to the second target gray scale by table lookup; when the first response time is greater than a fourth response time, inserting a white insertion time between the current frame and the next frame of the sub-pixel, and controlling the corresponding sub-pixel to display the reference gray scale in the white insertion time and to display the second target gray scale in the next frame, the fourth response time being a time sum of the second response time and the third response time; when the first response time is less than or equal to the fourth response time, controlling the sub-pixel to display the second target gray scale in the next frame.

2. The driving method of a display device according to claim 1, wherein The driving method of the display device further comprises: dividing the display panel and the backlight module into a plurality of display sub-regions and a plurality of backlight sub-modules, each display sub-region corresponding to a backlight sub-module; obtaining a ratio of the sub-pixel with the white insertion time in each display sub-region to the total sub-pixel in the display sub-region, and when controlling the sub-pixel to display the reference gray scale in the white insertion time, synchronously outputting a backlight voltage to the matching backlight sub-module according to the ratio to positively correlate the backlight brightness of the backlight sub-module.

3. The driving method of a display device according to claim 2, wherein The driving method of the display device further comprises: obtaining a first starting time point of the current frame of the sub-pixel and a second starting time point of the white insertion time, and calculating a first time interval of the first starting time point and the second starting time point, and obtaining an output time point of the first starting time point and the backlight voltage, and calculating a second time interval of the first starting time point and the output time point; comparing the first time interval and the second time interval, when the first time interval and the second time interval are not equal, inserting a first delay time between the first starting time point and the second starting time point, or inserting a second delay time between the first starting time point and the output time point, so that the first time interval is equal to the second time interval.

4. The driving method of a display device according to claim 1, wherein After the white insertion time is inserted between the current frame and the next frame of the sub-pixel, and the corresponding sub-pixel is controlled to display the reference gray scale in the white insertion time, it further comprises: in the initial time period of the white insertion time corresponding to the sub-pixel, obtaining a charging voltage of the sub-pixel, and comparing the charging voltage with a preset charging voltage; when the charging voltage is greater than the preset charging voltage, increasing the driving voltage of the reference gray scale in the subsequent time period of the white insertion time of the sub-pixel or the next driving period of the sub-pixel; when the charging voltage is less than the preset charging voltage, the driving voltage of the reference gray scale of the sub-pixel is reduced in a subsequent time period of the white insertion time of the sub-pixel or a next driving period of the sub-pixel; when the charging voltage is equal to the preset charging voltage, the driving voltage of the reference gray scale of the sub-pixel is maintained.

5. The driving method of a display device according to claim 2, wherein The control of the sub-pixel to display the second target gray scale in the next frame further includes: controlling the display device to perform black insertion display between one of the intermediate time points to the end time point of the next frame of the sub-pixel.

6. The driving method of a display device according to claim 5, wherein The control of the display device to perform black insertion display between one of the intermediate time points to the end time point of the next frame of the sub-pixel includes: controlling the display of the minimum gray scale corresponding to the sub-pixel between one of the intermediate time points to the end time point of the next frame of the sub-pixel.

7. The driving method of a display device according to claim 5, wherein The control of the display device to perform black insertion display between one of the intermediate time points to the end time point of the next frame of the sub-pixel includes: controlling the sub-pixel to display the second target gray scale in the next frame, and adjusting the voltage of the backlight voltage between one of the intermediate time points to the end time point of the next frame of the sub-pixel to reduce or extinguish the brightness of the backlight sub-module; or, controlling the sub-pixel to display the second target gray scale in the next frame, and outputting the high-frequency pulse of the backlight voltage and reducing the duty cycle of the backlight voltage between one of the intermediate time points to the end time point of the next frame of the sub-pixel to reduce the brightness of the backlight sub-module.

8. The driving method of a display device according to claim 5, wherein The driving method of the display device further includes: obtaining the gray scale change and the backlight brightness change of the current frame and the next frame of the sub-pixel, and determining whether there is a white insertion time and / or black insertion display before the next frame of the sub-pixel; when the white insertion time and / or the black insertion display exist, controlling the backlight module or the backlight sub-module to work at a first backlight voltage for display at the end of the white insertion time or the end of the black insertion display, and controlling the backlight module or the backlight sub-module to work at a second backlight voltage for display after a preset time period, the first backlight voltage being greater than the second backlight voltage.

9. The method of driving a display device according to any one of claims 1 to 8, wherein The sub-pixel includes a red sub-pixel, a blue sub-pixel, and a green sub-pixel; The driving method of the display device further includes: obtaining the deflection response time of the red sub-pixel, the blue sub-pixel, and the green sub-pixel at the same gray scale before obtaining the first target gray scale of the current frame and the second target gray scale of the next frame of each sub-pixel, and obtaining the driving voltage corresponding to the reference gray scale of each sub-pixel according to the respective deflection response time by table lookup, the driving voltage corresponding to the sub-pixel being positively correlated with the deflection response time; in the white insertion time corresponding to the sub-pixel, outputting the driving voltage corresponding to the matching sub-pixel to the sub-pixel corresponding to the driving voltage to make the sub-pixel corresponding to the sub-pixel display the reference gray scale.

10. A display device, characterized by comprising: The display device includes a display panel, a backlight module, and a driving circuit, the display panel includes a plurality of sub-pixels arranged in an array; The driving circuit includes: A driving circuit of the display panel is connected with the display panel, and is configured to control the display panel to display a corresponding gray scale according to a panel driving signal. A backlight driving circuit is connected with the backlight module, and is configured to control the backlight module to display a corresponding brightness according to a backlight adjusting signal. A controller is connected with the driving circuit of the display panel and the backlight driving circuit respectively, and is configured to output the panel driving signal and the backlight adjusting signal to execute the driving method of the display device according to any one of claims 1-9.

Images