Patent Publication Number: US-10789898-B2

Title: Display method with voltage signal conversion based on lookup table and display device

Description:
FIELD OF THE DISCLOSURE 
     The present disclosure relates to an electronic technology field, and more particularly to a display method and a display device. 
     BACKGROUND OF THE DISCLOSURE 
     Most of the current large-size LCD panel used is the negative vertical alignment (VA) LCD or the in-plane switching (IPS) LCD technology. The VA-type LCD technology compared to the IPS liquid crystal technology has advantages of high production efficiency and low manufacturing cost. However, the VA-type liquid crystal technology in the optical properties compared to the IPS liquid crystal technology are more obvious optical defects, especially large-size panel in the commercial application needs a larger perspective. The VA-type LCD driver in the viewing angle color is often unable to meet the market demand. 
     The method of the general VA-type LCD technology to solve the viewing angle color shift is subdividing the RGB sub-pixel into primary and secondary pixels and giving the different driving voltages to the primary and secondary pixels on the space to solve the defects of the viewing angle color shift. This often requires the design of metal traces or thin film transistor (TFT) components to drive sub-pixels, resulting in the sacrifice of the transparent open area, the impact of the panel penetration, and the promotion of the backlight cost. 
     SUMMARY OF THE DISCLOSURE 
     The embodiment of the present application provides a display method and a display device which can improve the panel&#39;s luminous flux, reduce the backlight cost and improve the color shift phenomenon. 
     In one aspect, the present application provides a display method including: 
     receiving an image data of a target picture; 
     acquiring a first voltage signal corresponding to the image data; 
     converting the adjacent first voltage signal into a voltage distributed second voltage signal; 
     driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. 
     In another aspect, the present application provides a display method including: 
     receiving an image data of a target picture; 
     acquiring a first voltage signal corresponding to the image data; 
     converting the adjacent first voltage signal into a voltage distributed second voltage signal; 
     determining whether the second voltage signal exceeds a preset voltage threshold; deleting a duration corresponding to the second voltage signal according to a preset deletion ratio if the second voltage signal exceeds the preset voltage threshold; 
     driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal, wherein a surface of the pixel unit is etched with a first alignment pattern and a second alignment pattern, the first alignment pattern being stacked in parallel with the second alignment pattern and shifting a preset distance; 
     wherein the first voltage signal includes a voltage signal corresponding to a red, green, and blue sub-pixel unit of the pixel unit, converting a voltage signal group corresponding to a plurality of the blue or green or red sub-pixel units into a voltage signal group with voltage distributed, the voltage distributed voltage signal group is the second voltage signal, wherein the number of the blue sub-pixel units for converting each of the second voltage signals is greater than the number of the green or red sub-pixel units for converting to each of the second voltage signals. 
     In yet another aspect, the present application provides a display device including: 
     a display panel; 
     a receiving unit for receiving image data of the target picture; 
     an acquisition unit for acquiring a first voltage signal corresponding to the image data; 
     a conversion unit for converting the adjacent first voltage signal into a voltage distributed second voltage signal; 
     and an execution unit for driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. 
     The display method and the display device of the embodiment of the present application converting the first voltage signal into a voltage distributed second voltage signal after acquiring the first voltage signal corresponding to the image data. And then driving the pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. So that the voltage distributed voltage signal on the adjacent space achieves the brightness of the face view and side view closing to the target. Thereby improving the chromatic aberration phenomenon, improving the panel permeability, and reducing the cost of the backlight. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to more clearly illustrate the technical solution of the embodiment of the present application, the drawings to be used in the description of the examples will be briefly described below. It will be apparent that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained by those skilled in the art without departing from the inventive work. 
         FIG. 1  is a schematic flow diagram of a display method provided in the first embodiment of the present application; 
         FIG. 2  is a schematic flow diagram of a display method provided in the second embodiment of the present application; 
         FIG. 3  is a schematic flow diagram of a display method provided in the third embodiment of the present application; 
         FIG. 4  is a schematic diagram of a display area block distribution of a display method provided in the embodiment of the present application; 
         FIG. 5  is a schematic representation of the display area pixel unit distribution of the display method provided by the embodiment of the present application; 
         FIG. 6  is a graph showing the relationship between the luminance and the voltage of the display method provided in the embodiment of the present application; 
         FIG. 7  is a partial relationship between the luminance and the voltage of the display method provided in the embodiment of the present application; 
         FIG. 8  is another partial relationship diagram of the luminance and voltage of the display method provided in the embodiment of the present application; 
         FIG. 9  is a color space diagram of the Lab and LCH of the display method provided in the embodiments of the present application; 
         FIG. 10  is a schematic block diagram of a display device provided in embodiments 1 and 2 of the present application; 
         FIG. 11  is a schematic block diagram of a display device provided in the third embodiment of the present application; 
         FIG. 12  is a flow chart of the replacement of the voltage signal provided in the first embodiment of the present disclosure; 
         FIG. 13  is a flow chart of the replacement of the voltage signal provided in the second embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The technical solution in the embodiments of the present application will be described in detail below in connection with the drawings in the embodiments of the present application. It is obvious that the described embodiments are part of the present application, not all embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of this application, based on the embodiments of the present application. 
     It is to be understood that the terms “including” and “comprising” indicate the presence of the described features, integers, steps, operations, elements and/or components when used in this specification and in the appended claims. But does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or collections thereof. 
     Referring to  FIG. 1 , which is a schematic flow diagram of a display method provided in the first embodiment of the present application, the method includes the following steps S 11  to S 14 : 
     Step S 11 : receiving an image data of a target picture. 
     Specifically, the receiving an image data of a target picture is the screen driving panel of the display device receiving the image data of the screen to be displayed sent by the front end. Since the display device is a frame-by-frame display, the screen driving panel receiving the front-end data is also frame-by-frame. Wherein 1 to 2 frame image data are stored in the memory of the screen driving panel to facilitate the control IC of the screen driving panel analyzing the 1 to 2 frame image data, in order to perform the subsequent steps. 
     Step S 12 : acquiring a voltage signal corresponding to red, green, and blue sub-pixel units of a pixel data of the image data as a first voltage signal. 
     Specifically, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained as the first voltage signal. That is, a voltage signal for displaying the target picture corresponding to each of the red, green and blue sub-pixel units is obtained, and the voltage signal is converted as a first voltage signal for subsequent steps. 
     Step S 13 : converting a voltage signal group corresponding to a plurality of the blue or green or red sub-pixel units into a voltage signal group with voltage distributed, the voltage distributed voltage signal group is a second voltage signal. 
     Specifically, referring to  FIGS. 6 to 8 , which is a curve of voltage (horizontal axis) increase and luminance (vertical axis) variation, K 1  is the target voltage increase with the brightness change curve when looking at the front. Through the distribution of high and low voltage signals (That is, high and low voltage signal interval distribution, the adjacent two voltage signals for a high and one low) to meet the closing proportion of the brightness changes of the face and side view. As shown in  FIG. 6 , Curve K 2  and K 4  are the situation of side view brightness changes with voltage in two high voltage and low voltage combination. As shown in  FIGS. 7 and 8 , for the local high voltage and low voltage curve in different combinations of design can be found with the target curve K 1  will have different degrees of difference. A voltage distributed voltage cannot meet the need of the high and low voltage brightness closing to the target brightness. 
     As shown in  FIG. 7 , when considering the relationship between low voltage and brightness change, the difference d 1 ( n ) between the actual brightness and the target luminance in the voltage distributed voltage combination K 4  is greater than the difference d 2 ( n ) between the actual brightness and the target luminance in the space segmented high and low voltage combination K 2 . As shown in  FIG. 8 , when considering the relationship between high voltage and brightness change, the difference d 1 ( n ) between the actual brightness and the target luminance in the voltage distributed voltage combination K 4  is far less than the voltage distributed voltage combination K 2 . The space segmented high and low voltage combination K 4  is suitable when the quality content of the display appears a higher voltage signal. On the other hand, the space segmented high and low voltage combination K 2  is suitable when the quality content of the display appears a lower voltage signal. The curve of viewing angle and brightness K 3  is generated by the high and low voltage combination of K 4  and K 2 . Its characteristic combines the advantages of K 4  high gray scale combination and K 2  low gray scale combination, so that the angle curve is closer to the target curve, the curve changes are smoother, and it is not easy to have the phenomenon of color quality mutation or abnormal color mixing. 
     Specifically, in the case of an RGB three-color display device, each pixel unit corresponds to a sub-pixel unit having red, green, and blue (RGB) three primary colors. Corresponding image voltage signals are denoted as Ri, j, Gi, j, Bi, j (i, j=1, 2, 3 . . . ). In the following, the voltage signal of the blue sub-pixel unit is taken as an example, and four voltage signals of Bi, j and adjacent Bi, j+1, Bi+1, j, Bi+1, j+1. The four voltage signals are converted into Bn′_H 1 , Bn′_H 2  high voltage signals and Bn′_L 1 , Bn′_L 2  low voltage signals. Wherein the voltage combination of Bn′_H 1  and Bn′_L 1  is the curve K 4  as shown in  FIG. 6 , the other voltage combination of Bn′_H 2  and Bn′_L 2  is the curve K 2  as shown in  FIG. 3 . In this application, Bn′_ 1 , Bn′_H 2 , Bn′_L 1 , Bn′_L 2  are substituted for the picture quality signals of the original four blue sub-pixel units Bi, j, Bi, j+1, Bi+1, j, Bi+1, j+1, so that the angle view of the K 3  curve shown in  FIG. 6  compared to the original K 4 , K 2  curve in the high and low gray scale can be closer to the target viewing angle curve K 1  to solve a set of voltage cannot solve the high and low voltage can simultaneously meet the shortcomings of viewing angle compensation. 
     Referring to  FIGS. 4 and 5 , the original image of the full-frame blue picture quality is divided into a plurality of blocks n=0, 1, 2, . . . , M in the RGB three-color display device as an example, as shown in  FIG. 4 , respectively, B 1 , B 2 , B 3 , . . . , BM. As shown in  FIG. 5 , each of the divided blocks n contains a plurality of blue sub-pixels, and the blue sub-pixels are arranged as Bn_ 1 , 1 , Bn_ 1 , 2 , . . . Bn_i, j. Bn′=Average (Bn_ 1 , 1 , Bn_ 1 , 2 , . . . Bn_ 2 , 1 , Bn_ 2 , 2  , . . . , Bn_i, j) for all blue sub-pixel signals in the n block. 
     Similarly, when the whole picture is green, the average value of all green sub-pixel signal in the block n is Gn′=Average(Gn_ 1 , 1 , Gn_ 1 , 2 , . . . Gn_ 2 , 1 , Gn_ 2 , 2  . . . , Gn_i,j). When the whole picture is red, the average value of all red sub-pixel signal in the block n is Rn′=Average(Rn_ 1 , 1 , Rn_ 1 , 2 , . . . Rn_ 2 , 1 , Rn_ 2 , 2  . . . , Rn_i,j). 
     The embodiment of the present application judges the combination of the high and low voltage signals of the RGB sub-pixel unit by color. Referring to the CIE LCH color space diagram shown in  FIG. 9 , the color of the combined pixels representing the RGB in the color coordinate system is represented by L (luminance), C (saturation), and H (hue). Where H is 0° to 360° for different hue colors, 0° is defined as red, 90° is yellow, 180° is green, 270° is blue, C is color saturation, which represents the brightness of color, C range is expressed as 0 to 100,100 on behalf of the most vivid colors, C values to a certain extent, reflects the LCD display voltage signal level. 
     The first voltage signal corresponding to the RGB sub-pixel unit is converted according to the specific case in  FIG. 12  to obtain a corresponding second voltage signal: 
     (1) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 0°&lt;H≤45° and 315°&lt;H≤360°, and the judgment criteria of the color saturation satisfied the CTL 1 ≤C≤CTH 2  is using the high and low voltage combination R_LUT_ 1 , G_LUT_ 1  and B_LUT_ 1 . 
     (2) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 45°&lt;H≤135°, and the judgment criteria of the color saturation satisfied the CTL 3 ≤C≤CTH 4  is using the high and low voltage combination R_LUT_ 2 , G_LUT_ 2  and B_LUT_ 2 . 
     (3) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 135°&lt;H≤205°, and the judgment criteria of the color saturation satisfied the CTL 5 ≤C≤CTH 6  is using the high and low voltage combination R_LUT_ 3 , G_LUT_ 3  and B_LUT_ 3 . 
     (4) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 205°&lt;H≤245°, and the judgment criteria of the color saturation satisfied the CTL 7 ≤C≤CTH 8  is using the high and low voltage combination R_LUT_ 4 , G_LUT_ 4  and B_LUT_ 4 . 
     (5) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 245°&lt;H≤295°, and the judgment criteria of the color saturation satisfied the CTL 9 ≤C≤CTH 10  is using the high and low voltage combination R_LUT_ 5 , G_LUT_ 5  and B_LUT_ 5 . 
     (6) the hue of the combination pixel calculated by the average signals Bn′, Rn′ and Gn′ satisfied 295°&lt;H≤315°, and the judgment criteria of the color saturation satisfied the CTL 11 ≤C≤CTH 12  is using the high and low voltage combination R_LUT_ 6 , G_LUT_ 6  and B_LUT_ 6 . 
     Each of the average signals Bn′, Rn′ and Gn′ corresponds to the search value of the fixed R/G/B pixels Rn_s_i,j, Rn_s_i,j+1, Rn_s_i+1,j, Rn_s_i+1,j+1/Gn_s_i,j, Gn_s_i,j+1, Gn_s_ i+1,j, Gn_s_i+1,j+1/Bn_s_i,j, Bn_s_i,j+1, Bn_s_i+1,j, Bn_s_i+1,j+1 of the two sets of high and low voltage combinations Rn_s_ H 1 , Rn_s_L 1 , Rn_s_H 2 , Rn_s_L 2 /Gn_s_H 1 , Gn_s_L 1 , Gn_s_H 2 , Gn_s_L 2 /Bn_s_H 1 , Bn_s_L 1 , Bn_s_H 2 , Bn_s_L 2 , which can make the angle curve closer to the target curve. 
     Example of a blue sub-pixel cell signal in which four adjacent sub-pixels are labeled as four signals Bn_s_i, j, Bn_s_i, j+1, Bn_s_i+1, j, Bn_s_i+1, j+1, averaging the signal B′n_s=Average (Bn_s_i, j, Bn_s_i, j+1, Bn_s_i+1, j, Bn_s_i+1, j+1), s represents the number of cell blocks in the n block that are combined with four blue sub-pixel units. The new blue sub-pixel signal in the cell block is obtained by taking the average signal B′n_s of the four blue sub-pixel signal in the cell block, by taking the average signal Bn′ of all the blue sub-pixel unit signals Bn_i,j in the n block (frame N), and by the lookup table of the color judgment condition.  FIG. 12  shows the two sets of high and low voltage combinations Bn_s_H 1 , Bn_s_L 1  and Bn_s_H 2 , Bn_s_L 2  for each group of cell block signal mean values B′n_s. The two high and low voltage combinations Bn_s_H 1 , Bn_s_L 1  and Bn_s_H 2 , Bn_s_L  2  signals correspond to FrameN+1 frame, that is, the high and low voltage signals of the four blue sub-pixel units corresponding to the new cell block signal is Bn_s_i, j=Bn_s_H 1 , Bn_s_i, j+1=Bn_s_L 1 , Bn_s_i+1, j=Bn_s_L 2 , Bn_s_i+1, j+1=Bn_s_H 2 . 
     Step S 14 : driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. 
     Specifically, driving the RGB sub-pixel unit of the pixel unit and responding the pixel unit to display the target picture by the converted voltage distributed second voltage signal. 
     Specifically, after the first voltage signal corresponding to the acquired image data is obtained, the first voltage signal is converted into a second voltage signal having a voltage high and low phase distribution. And then the display device drives the pixel unit and responses the second voltage signal to display the target screen, so that the high and low voltage signals distributed in the adjacent space are close to the target which is close to the face view and side view brightness change, thereby improving the chromatic aberration phenomenon. Since the second voltage signal is responded by each individual sub-pixel unit, it is not necessary to divide the primary and secondary pixels on the RGB sub-pixel unit, thus the reduction of the translucent opening area caused by the need to re-design the metal traces or TFT components to drive the secondary pixels is avoided, thereby increasing the panel permeability and reducing the backlight cost. 
     Referring to  FIG. 2 ,  FIG. 2  is a schematic flow diagram of a display method provided in the second embodiment of the present application. As shown in  FIG. 2 , the method includes the following steps S 21  to S 24 : 
     Step S 21 : receiving an image data of a target picture. 
     Specifically, the receiving an image data of a target picture is the screen driving panel of the display device receiving the image data of the screen to be displayed sent by the front end. Since the display device is a frame-by-frame display, the screen driving panel receiving the front-end data is also frame-by-frame. Wherein 1 to 2 frame image data are stored in the memory of the screen driving panel to facilitate the control IC of the screen driving panel analyzing the 1 to 2 frame image data, in order to perform the subsequent steps. 
     Step S 22 : acquiring a voltage signal corresponding to red, green, and blue sub-pixel units of a pixel data of the image data as a first voltage signal. 
     Specifically, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained as the first voltage signal. That is, a voltage signal for displaying the target picture corresponding to each of the red, green and blue sub-pixel units is obtained, and the voltage signal is converted as a first voltage signal for subsequent steps. 
     Step S 23 : converting a voltage signal group corresponding to a plurality of the blue or green or red sub-pixel units into a voltage signal group with voltage distributed, the voltage distributed voltage signal group is the second voltage signal. The number of the blue sub-pixel units for converting each of the second voltage signals is greater than the number of the green or red sub-pixel units for converting to each of the second voltage signals. 
     Specifically, red and green are used as sub-pixel units less than blue (e.g., red and green 2, blue 4) to convert as a set of high and low voltage signals, that is, a green or red sub-pixel unit smaller than the blue sub-pixel unit is converted as a group. In each of the individual high and low voltage signal groups after conversion, the green or red sub-pixel unit is less than the blue sub-pixel unit in each individual high and low voltage signal group. 
     The first voltage signal corresponding to the green and red sub-pixel units is converted according to the specific situation in  FIG. 13  to obtain a corresponding second voltage signal. 
     Example Red pixel signal, in the n block, the adjacent four sub-pixel signals Rn_s_i, j, Rn_s_i, j+1, Rn_s_i+1, j, Rn_s_i+1, j+1 take the average signal: 
     R′n_s=Average(Rn_s_i,j,Rn_s_i,j+1),R′n_s+1=Average(Rn_s_i+1,j,Rn_s_i+1,j+1). 
     s represents the number of cell blocks in the block that are combined with four red sub-pixels. S, S+1 is the four red sub-pixels for the combination of the block number and then divided into two independent combination of high and low voltage signal pairs. Each of the new red sub-pixel signals is subdivided into two independent sub-pixel signal averages R′n_s, R′n_s+1 by the four sub-pixel blocks. The average signal Bn′ is calculated based on the signal Bn_i, j of all the blue sub-pixel units in the n block (Frame N). The four red sub-pixel units in the new cell block signal is corresponding outputted by the lookup table of the color judgment condition. As shown in  FIG. 13 : Rn_s_i, j=Rn_s_H 1 , Rn_s_i, j+1=Rn_s_L 1 , Rn_s_i+1, j=Rn_s_L 2 , Rn_s_i+1, j+1=Rn_s_H 2 . 
     The conversion mode of the green sub-pixel unit is the same as that of the red sub-pixel unit in the present embodiment, and the blue sub-pixel unit is converted in the same manner as in the first embodiment. 
     Step S 24 : driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. 
     Specifically, driving the RGB sub-pixel unit of the pixel unit and responding the pixel unit to display the target picture by the converted voltage distributed second voltage signal. 
     Specifically, because the human eye feels green and red is more sensitive. Since the number of blue sub-pixel units converted to each second voltage signal is larger than the number of green or red sub-pixel units for converting to the second voltage signal. So that the resolution of the converted green and red second voltage signals will be higher than the resolution of the blue second voltage signal, thereby avoiding the graininess of the picture. 
     Referring to  FIG. 3 ,  FIG. 3  is a schematic flow diagram of a display method provided in the third embodiment of the present application. As shown in  FIG. 3 , the method includes the following steps S 31  to S 36 : 
     Step S 31 : receiving an image data of a target picture. 
     Specifically, the receiving an image data of a target picture is the screen driving panel of the display device receiving the image data of the screen to be displayed sent by the front end. Since the display device is a frame-by-frame display, the screen driving panel receiving the front-end data is also frame-by-frame. Wherein 1 to 2 frame image data is stored in the memory of the screen driving panel to facilitate the control IC of the screen driving panel analyzing the 1 to 2 frame image data, in order to perform the subsequent steps. 
     Step S 32 : acquiring a first voltage signal corresponding to the image data. 
     Specifically, the first voltage signal corresponding to the image data is obtained, that is, the voltage signal for displaying the target picture corresponding to each pixel unit is acquired. 
     Step S 33 : converting the adjacent first voltage signal into a voltage distributed second voltage signal. 
     Specifically, the adjacent first voltage signal is converted into a voltage signal with voltage distributed, and the specific conversion mode is described in the first or second embodiment. 
     Step S 34 : determining whether the second voltage signal exceeds a preset voltage threshold. 
     Specifically, the magnitude of the voltage corresponding to the second voltage signal is compared with the magnitude of the preset voltage threshold to determine whether the voltage magnitude corresponding to the second voltage signal is greater than the preset voltage threshold. 
     Step S 35 : deleting a duration corresponding to the second voltage signal according to a preset deletion ratio if the second voltage signal exceeds the preset voltage threshold. 
     Specifically, if the voltage magnitude corresponding to the second voltage signal exceeds the preset voltage threshold value, the duration of the second voltage signal exceeding the preset voltage threshold is subtracted according to the preset deletion ratio. For example, the default deletion ratio is 20%, the duration of the second voltage signal exceeding the preset voltage threshold is 100 ms, then the original 100 ms minus 20 ms according to the deletion ratio of 20%, eventually the duration corresponding to the second voltage signal exceeding the preset voltage threshold is 80 ms. 
     Step S 36 : driving a pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. 
     Specifically, driving the RGB sub-pixel unit of the pixel unit and responding the pixel unit to display the target picture by the converted voltage distributed second voltage signal. 
     In particular, by reducing the time of the second voltage signal exceeding the preset voltage threshold, the interference of the residual image left after the long display of the high luminance picture corresponding to the high voltage signal to the next frame is avoided, and the screen display clarity is improved. 
     Further, a surface of the pixel unit is etched with a first alignment pattern and a second alignment pattern in which the first alignment pattern and the second alignment pattern are stacked in parallel and shifted from the preset distance. 
     Specifically, the first alignment pattern and the second alignment pattern of the pixel unit surface etched is composed by the electrode slits. At present, the resolution of the exposure machine and the process capability of the etching process capability are limited. Assuming that the process width limit is m, that is, the electrode slit with width m can only be made. However, if the two alignment pattern layers are staggered and the two electrode slit portions are overlapped in accordance with the present embodiment, the overlapped portion is a new width smaller electrode slit. In this way, the electric field strength at the electrode slit can be further enhanced, and the dark lines can be further reduced. 
     Referring to  FIG. 10 ,  FIG. 10  is a schematic block diagram of the display device  500  provided in the first and second embodiments of the present application. As shown in  FIG. 10 , the display device  500  includes: a display panel  590 , a receiving unit  510 , an acquisition unit  520 , a conversion unit  530  and an execution unit  540 . Wherein the receiving unit  510  is configured to receive the image data of the target picture; the acquisition unit  520  is configured to acquire a first voltage signal corresponding to the image data, that is, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained as the first voltage signal; the conversion unit  530  is configured to convert the adjacent first voltage signal into a voltage distributed second voltage signal; and the execution unit  540  is configured to drive a pixel unit on the display panel  590  and respond to display the target picture according to the second voltage signal. 
     Specifically, after the receiving unit  510  receives the image data of the target screen, the acquisition unit  520  starts acquiring the first voltage signal corresponding to the image data. That is, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained. In the first embodiment, the conversion unit  530  is used for converting a voltage signal group corresponding to a plurality of adjacent blue or green or red sub-pixel units into a voltage signal group of a voltage distributed, and the voltage distributed voltage signal group is the second voltage signal. In the first embodiment, the number of blue, green and red sub-pixel units for conversion into the second voltage signal is the same, through the phase distribution of the high ground voltage signal to achieve the front and side view brightness changes close to the purpose. Through the distribution of high and low voltage signals to meet the closing proportion of the brightness changes of the face and side view. In the second embodiment, the conversion unit  530  is used for converting a voltage signal group corresponding to a plurality of adjacent blue or green or red sub-pixel units into a voltage signal group of a voltage distributed. But the number of blue sub-pixel units for conversion to each second voltage signal is greater than the number of green or red sub-pixel units for conversion to each second voltage signal. Then the execution unit  540  driving the pixel unit and responding the pixel unit to display the target picture according to the second voltage signal. Because the human eye feels green and red is more sensitive. Since the number of blue sub-pixel units converted to each second voltage signal is larger than the number of green or red sub-pixel units for converting to the second voltage signal. So that the resolution of the converted green and red second voltage signals will be higher than the resolution of the blue second voltage signal, thereby avoiding the graininess of the picture. 
     Referring to  FIG. 11 ,  FIG. 11  is a schematic block diagram of a display device provided in the third embodiment of the present application. As shown in figure, the display device  600  includes: a display panel  690 , a receiving unit  610 , an acquisition unit  620 , a conversion unit  630 , a determination unit  650 , a deletion unit  640  and an execution unit  660 . Wherein the receiving unit  610  is configured to receive the image data of the target picture; the acquisition unit  620  is configured to acquire a first voltage signal corresponding to the image data, that is, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained as the first voltage signal; the conversion unit  630  is configured to convert the adjacent first voltage signal into a voltage distributed second voltage signal; the determination unit  650  is configured to determine whether the second voltage signal exceeds a preset voltage threshold; the deletion unit  640  is used to delete the duration corresponding to the second voltage signal according to a preset deletion ratio if the second voltage signal exceeds the preset voltage threshold; and the execution unit  660  is configured to drive a pixel unit on the display panel  690  and respond to display the target picture according to the second voltage signal. 
     Specifically, after the receiving unit  610  receives the image data of the target screen, the acquisition unit  620  starts acquiring the first voltage signal corresponding to the image data. That is, the voltage signal corresponding to the red, green, and blue sub-pixel units of the pixel unit is obtained. And converts the adjacent first voltage signal into a second voltage signal having a voltage high and low phase distribution by the conversion unit  630 . After the second voltage signal is converted, the determination unit  650  determines whether or not the second voltage signal exceeds the preset voltage threshold. If the preset voltage threshold is exceeded, the deletion unit  640  subtracts the duration of the second voltage signal from the preset deletion ratio. After the deletion is completed, the execution unit  660  drives the pixel unit and responds to the second voltage signal to display the target picture. 
     In some embodiments, the display panel  590  or  690  may be, for example, a twisted nematic liquid crystal display panel, a plane conversion type liquid crystal display panel a multi-quadrant vertical alignment LCD display panel, an OLED display panel, a QLED display panel, a curved display panel or other display panel. 
     In particular, by reducing the time of the second voltage signal exceeding the preset voltage threshold, the interference of the residual image left after the long display of the high luminance picture corresponding to the high voltage signal to the next frame is avoided, and the screen display clarity is improved. 
     In several embodiments provided herein, it is to be understood that the disclosed method is merely illustrative and may be embodied in other ways. 
     It should be noted that the steps in the embodiments of the present application can be sequentially adjusted, merged and deleted according to actual needs. 
     As described above, only the specific embodiments of the present application, but the scope of the present application is not limited thereto, it will be apparent to those skilled in the art that various modifications or substitutions may be readily apparent to those skilled in the art, and that such modifications or substitutions are intended to be within the scope of the present application. Accordingly, the scope of protection of the present application is subject to the scope of protection of the claims.