TWI678693B - Method for driving the multiplexer and display device - Google Patents

Abstract

A multiplexer driving method includes the following steps: dividing a plurality of data lines and a plurality of sub pixels into a plurality of groups according to the number of multiplexers, wherein each group includes a multiplexer and a part of the data lines of the data line And some sub-pixels of sub-pixels; calculate the transient value of each group according to the gray-scale value of the first frame and the gray-scale value of the second frame; calculate the liquid crystal charging time corresponding to each transient value And determining the enabling time of the driving signal of the multiplexer according to the charging time of the liquid crystal.

Description

Multiplexer driving method and display device

The present disclosure relates to a driving method and a display device, and more particularly to a multiplexer driving method and a display device capable of adjusting a multiplexer on time according to display data.

Low temperature poly-silicon thin-film transistor (LTPS TFT) has the characteristics of high carrier mobility and small size, and is suitable for display panels with high resolution, narrow bezels and low power consumption. At present, the industry widely uses multiplexer switches to reduce the use of source driver ICs, which can reduce the area occupied by manufacturing finished products and source driver ICs. However, when the number of multiplexer switches is increased, the charging time of the liquid crystal is reduced, resulting in insufficient charging of some sub-pixels, causing the problem that the contrast of some or all areas of the display panel is reduced due to insufficient charging. .

The main object of the present invention is to provide a multiplexer driving method and a display panel using the same, which are mainly used to display data by comparison. The amount of difference, calculate the length of time required to charge the LCD, and adjust the multiplexer on time to reduce the use of the source driver IC (Source driver IC), while also solving the display device's effect of reducing the contrast of the display screen due to insufficient charging .

In order to achieve the above object, the first aspect of the present case is to provide a multiplexer driving method. The multiplexer driving method is applied to a display device, and includes the following steps: dividing a plurality of data lines and a plurality of sub-pixels into a plurality of groups according to the number of multiplexers, where each group includes a multiplexer and a data line unit; Data lines and some sub-pixels of sub-pixels; calculate the transient value of each group according to the gray-scale value of the first frame and the gray-scale value of the second frame; calculate the corresponding value of each transient value Liquid crystal charging time; and determining the enabling time of the driving signal of the multiplexer according to the liquid crystal charging time.

A second aspect of the present case is to provide a display device. The display device includes a plurality of sub-pixels, a plurality of data lines, a plurality of multiplexers, and a processor. The plurality of multiplexers are electrically coupled to the data line and the sub-pixels, and the processor is electrically coupled to the multiplexer. The processor is configured to divide the data line and the sub-pixels into a plurality of groups according to the number of multiplexers, and calculate the transient value of each group according to the grayscale value of the first frame and the grayscale value of the second frame. Then, Calculate the liquid crystal charging time corresponding to each transient value, and determine the enable time of the driving signal of the multiplexer according to the liquid crystal charging time. Each group includes one of the multiplexers, part of the data lines of the data line, and part of the sub pixels of the sub pixel.

The driving method of the multiplexer of the present invention and the display panel using the method can compare the difference of the displayed data and calculate the required amount of liquid crystal charging. The length of time is used to adjust the on time of the multiplexer to reduce the use of the source driver IC, and also to solve the effect of reducing the contrast of the display screen due to insufficient charging.

100‧‧‧pixel circuit

110‧‧‧ processor

120, 121, 122‧‧‧ multiplexers

130‧‧‧ sub pixels

140‧‧‧source driver chip

200‧‧‧ Multiplexer driving method

DL, DL (1) ~ DL (n), DL (n + 1) ~ DL (2n) ‧‧‧Data line

GL, GL (1) ~ GL (n) ‧‧‧Gate line

CTL‧‧‧Drive signal

SW1 ~ SWn‧‧‧Switch

P1_1, P1_2, P2_1, P2_2 ‧‧‧ sub pixels

S210 ~ S250, S221A ~ S222A, S221B ~ S222B‧‧‧Steps

T1 ~ T10‧‧‧Time

In order to make the above and other objects, features, advantages, and embodiments of the disclosure document more comprehensible, the description of the drawings is as follows: FIG. 1 is a circuit diagram of a display device according to an embodiment of the disclosure document; and FIG. 2 FIG. 3A is a flowchart of a multiplexer driving method according to an embodiment of the present disclosure; FIG. 3A is a flowchart of step S220 according to one embodiment of the present case; and FIG. 3B is a flowchart of another embodiment according to the present case. The flowchart of step S220 is shown; FIG. 4 is a schematic diagram of a part of a display device according to an embodiment of the present disclosure; FIG. 5 is a timing diagram of the operation of the multiplexer according to an embodiment of the present disclosure; FIG. 7 is a timing diagram of operation of a multiplexer according to an embodiment of the present disclosure; FIG. 7 is a flowchart of a multiplexer driving method according to an embodiment of the present disclosure; and FIG. Examples of display devices Schematic.

Hereinafter, embodiments of the present invention will be described with reference to related drawings. In the drawings, the same reference numerals represent the same or similar elements or method flows.

See Figure 1. FIG. 1 is a circuit diagram of a display device 100 according to an embodiment of the present disclosure. As shown in FIG. 1, the display device 100 includes a processor 110, a plurality of multiplexers 120, a plurality of sub-pixels 130, a source driving chip 140, a plurality of data lines DL, and a plurality of gate lines GL (1) ~ GL (n). The multiplexer 120 is electrically coupled to the data line DL, the sub-pixel 130, and the source driving chip 140. In the embodiment shown in FIG. 1, only two multiplexers 121 and 122 are shown. The multiplexer 121 controls the switches SW1 ~ SWn and connects the data lines DL (1) ~ DL (n) and the sub-pixel 130, and the multiplexer 122 controls the switches SW1 ~ SWn and connects the data line DL (n + 1) ~ DL (2n) and sub-pixel 130, multiplexers 121 and 122 each include a plurality of switches SW1 ~ SWn, and each switch SW1 ~ SWn is electrically connected to a data line DL, respectively. For example, the switch SW1 is electrically connected to the data line DL (1) and the data line DL (n + 1). Therefore, when the switch SW1 is turned on, the data line DL (1) and DL (n + 1) also simultaneously transmit data. The voltage is written to the sub-pixel 130.

Please refer to Figure 1 and Figure 2 together. FIG. 2 is a flowchart of a multiplexer driving method 200 according to an embodiment of the present disclosure. In an embodiment, the multiplexer driving method 200 shown in FIG. 2 may be applied to the display device 100 shown in FIG. 1 and shown. The processor 110 is configured to drive the multiplexer according to the following. In the step described in the operation method 200, the enable time of the driving signal CTL of the multiplexer 120 is determined according to the liquid crystal charging time.

As shown in FIG. 2, the multiplexer driving method 200 first executes step S210 to divide the plurality of data lines DL and the plurality of sub-pixels 130 into a plurality of groups according to the number of multiplexers. In an embodiment, the number of multiplexers 120 is determined by the number of data lines and the data lines to which the multiplexer can be connected, and the data lines are grouped according to the number of switches. For example, if the number of data lines is 1024 And the multiplexer is a 1-to-2 multiplexer, in which case 512 multiplexers will be required, and since the 1-to-2 multiplexer will only have 2 switches, the data line is divided into 2 groups.

Next, the multiplexer driving method 200 executes step S220 to calculate the transient value of each group according to the grayscale value of the first frame picture and the grayscale value of the second frame picture. Please refer to FIG. 3A, which is a flowchart of step S220 according to some embodiments of the present invention. As shown in FIG. 3A, step S220 includes steps S221A and S222A.

In one embodiment, the multiplexer driving method 200 executes step S221A, compares the grayscale value of the first frame picture and the grayscale value of the second frame picture corresponding to each sub-pixel in each group, and calculates Multiple comparison results. Please refer to FIG. 4 together, which is a schematic diagram of a part of the display device 100 according to an embodiment of the present disclosure. Fig. 4 is a diagram showing the switches and pixels in Fig. 1; As shown in Figure 4, the data lines are divided into two groups (because there are two switches SW1 and SW2). Here, the data lines controlled by switch SW1 are referred to as the first group, and the data lines controlled by switch SW2. It is called the second group, and only the first group and the second group are taken as examples. First group control System data lines DL (1) and DL (n + 1), data lines DL (2) and DL (n + 2) controlled by the second group, assuming data lines DL (1), DL (2), DL (n + 1) and DL (n + 2) are only electrically connected to one of the gate lines GL. Here, the first gate line GL (1) is taken as an example. Of course, this disclosure is not limited to two groups, but may also be n groups as shown in FIG. 1 (because there are n switches SW1 to SWn).

Following the above, the first group has {sub-pixel P11, sub-pixel P12} a total of 2 sub-pixels (located on the data line DL (1) and the data line DL (n + 1)), assuming that the The gray value of the two sub-pixels P11 and P12 in the first frame is {50,50}, and the gray value of the second frame is {100,100}. The comparison result is calculated by graying the second frame. The grayscale value of the first frame is subtracted from the grayscale value of the first frame and then the absolute value is taken. Therefore, the difference between the grayscale values of the first frame and the second frame of the first two subpixels P11 and P12 is {50,50}. As can be seen from the above embodiment, the second group also has {subpixel P21, subpixel P22} a total of 2 subpixels (located on the data line DL (2) and the data line DL (n + 2)), and the second The gray values of the two sub-pixels P21 and P22 of the group in the first frame are {0,125} and the gray values of the second frame are {255,255}. The comparison result is calculated in the same way as in the first group. The grayscale value of the second frame is also subtracted from the grayscale value of the first frame and then the absolute value is taken. Therefore, the first frame and the second frame of the second group of two sub-pixels P21 and P22 are taken. The amount of difference in grayscale values is {255,130}.

Next, the multiplexer driving method 200 executes step S222A, and sets the maximum value in the comparison result as a transient value. Continuing the above embodiment, the grayscale value of the first frame of the first group and the grayscale value of the second frame are worth comparing. The result is {50,50}. The difference between the two subpixels P11 and P12 in the first group The maximum value of the quantity is 50, and the transient value of the first group is 50 after the above calculation. The grayscale value of the first frame of the second group and the grayscale value of the second frame are worth comparing. The result is {255,130}. The maximum difference between the two subpixels P21 and P22 in the second group is 255. After the above calculation, the transient value of the second group is 255.

In another embodiment, the multiplexer driving method 200 executes step S220, and the transient value required in step S220 can also be calculated according to the steps shown in FIG. 3B. Please refer to FIG. 3B, which is a flowchart of step S220 according to some embodiments of the present invention. As shown in FIG. 3B, step S220 includes steps S221B and S222B.

Following the above, the multiplexer driving method 200 executes step S221B, averages the grayscale values of the first frame pictures corresponding to each sub-pixel in each group, and calculates the average value of the first frame pictures; and The grayscale values of the second frame picture corresponding to each sub-pixel in a group are averaged, and the average value of the second frame picture is calculated. Please refer to FIG. 4 together. As shown in the embodiment shown in FIG. 4, the first group has {sub-pixel P11, sub-pixel P12} a total of 2 sub-pixels, assuming that the first group has 2 sub-pixels P11 The grayscale value of P12 in the first frame is {50,50}, and the grayscale value in the second frame is {100,100}. The average value of the first frame of the first group is calculated by adding the grayscale values of the two sub-pixels P11 and P12 in the first group, and dividing by the number of sub-pixels. The value is 50. Similarly, the average value of the second frame picture is calculated in the same way as above, so the average value of the second frame picture of the first group is 100.

Then, as can be seen from the above embodiment, the second group also has {sub Pixels P21 and P22} have 2 subpixels. The second group of 2 subpixels P21 and P22 has a grayscale value of {0,50} in the first frame and a grayscale value in the second frame. The value is {255,255}, and the comparison result is calculated in the same way as the first group, and will not be repeated here. Therefore, the average value of the first frame of the second group is 25, and the second frame of the second group is 25. The average value of the picture is 255.

Next, the multiplexer driving method 200 executes step S222B, and sets a difference between the average value of the first frame picture and the average value of the second frame picture as a transient value. Continuing the above embodiment, the average value of the first frame picture of the first group is 50, the average value of the second frame picture of the first group is 100, and the calculation method of the transient value of the first group is The average value of one frame is subtracted from the average value of the second frame and then the absolute value is taken, so the transient value of the first group is 50. The average value of the first frame of the second group is 25, the average value of the second frame of the second group is 255, and the transient value of the second group is calculated in the same way as the first group. This is not repeated here, so the transient value of the second group is 230.

Next, after the transient value is obtained from the steps shown in FIG. 3A or 3B, the multiplexer driving method 200 executes step S230 to calculate the liquid crystal charging time corresponding to each transient value. In one embodiment, a look-up table (LUT) can be used to generate a liquid crystal charging time corresponding to each transient value. For example, the comparison table can be represented by the following pseudo code: if (GroupK = 0) MUXK = T0

TH1)MUXK=T1 else if (0 <GroupK

TH1) MUXK = T1

TH2)MUXK=T2 else if (TH1 <GroupK

TH2) MUXK = T2

⋮

THy)MUXK=Ty else if (THy-1 <GroupK

THy) MUXK = Ty

In the above virtual code, GroupK is the transient value of the Kth group, K represents a total of several groups, TH1 ~ THy represents the grayscale value, and THy is determined by the resolution of the panel (for example, 8bit display panel , THy is 255), T1 ~ Ty represents the liquid crystal charging time, y depends on the characteristics of the liquid crystal and the resolution of the display panel. For example, in the 8-bit display panel, the three colors of red, green and blue have a total of 256 gray levels. y depends on how many categories are to be divided into 256 gray levels. Assuming y = 10, TH1 may be 25 and TH2 may be 50. Therefore, the transient value between 25 and 50 will correspond to the liquid crystal charging of T2. time. The K, y, and TH1 ~ THy described here can be adjusted according to the actual situation, here is only an exemplary description.

Next, the multiplexer driving method 200 executes step S240 to determine the enabling time of the driving signal of the multiplexer according to the charging time of the liquid crystal. Please refer to FIG. 5, which is a multiplexer 120 according to an embodiment of the present disclosure. Timing chart of operation. Continuing the above embodiment, the liquid crystal charging time corresponding to the first group is T1, and the liquid crystal charging time corresponding to the second group is T9, as shown in FIG. 5. One group and the second group are taken as an example (that is, the multiplexers 121 and 122 both control the switches SW1 and SW2). During the period when the gate line GL (1) is pulled up to the enable level, the first group The time for enabling the switch SW1 corresponding to the group is T1, the time for enabling the switch SW2 corresponding to the second group is T9, and the liquid crystal charging time T1 plus The upper liquid crystal charging time T9 is the time when the gate line GL (1) is pulled up to the enable level. After the gate line GL (1) is pulled down to the disabled level, the gate line GL (2) is then pulled up to the enabled level, and the gate line GL (2) is pulled up to the enabled level During the period, the time when the switch SW1 corresponding to the first group is enabled is T3, the time when the switch SW2 corresponding to the second group is enabled is T5, and the liquid crystal charging time T3 plus the liquid crystal charging time T5 is the gate line. GL (2) is pulled up to enable time. It can be known from the above that the total of the enabling times of the switches SW1 and SW2 is the same as the enabling time of the gate lines GL (1) and GL (2).

Following the above, the multiplexer driving method 200 executes step S250, adds up the liquid crystal charging time of each group, calculates the total time, and determines the enable time of the gate signal according to the total time. In one embodiment, the enabling time of the gate signal can be determined by the sum of the liquid crystal charging time of each group. Please refer to FIG. 6 together, which is a timing diagram of the operation of the multiplexer 120 according to an embodiment of the present disclosure. As shown in Figure 6, there are a total of switches SW1 ~ SWn, a total of n switches. It can be understood that the multiplexers 121 and 122 control the switches SW1 ~ SWn, and the on time of each switch SW1 ~ SWn is in accordance with the aforementioned liquid crystal. The calculation method of the charging time is determined, and the sum of the enabling times of the switches SW1 to SWn can determine the enabling time of the gate lines GL (1) to GL (n). From the example shown in Figure 6, it can be seen that the enable time of the gate lines GL (1) and GL (2) is determined according to the enable time of the switches SW1 ~ SWn. For example, the gate line GL (1) The enabling time is the sum of the on time T1 of the switch SW1, the on time T1 of the switch SW2, the on time T6 of the switch SW3, and the on time T2 of the switch SWn. The enable time of the gate line GL (2) is the on time T6 of the switch SW1 and the time of the switch SW2. The total of the turn-on time T6, the turn-on time T7 of the switch SW3, and the turn-on time T10 of the switch SWn. Therefore, the enabling times of the gate lines GL (1) and GL (2) may not be the same.

In another embodiment, please refer to FIG. 7, which is a flowchart of a multiplexer driving method 700 according to an embodiment of the present disclosure. The multiplexer driving method 700 shown in FIG. 7 can be applied to the display device 100 shown in FIG. 1 and the processor 110. The processor 110 is used to determine the liquid crystal charging time according to the steps described in the following multiplexer driving method 700. The enabling time of the driving signal CTL of the multiplexer 120. As shown in FIG. 7, the multiplexer driving method 700 first executes step S710 to divide the plurality of data lines DL and the plurality of sub pixels 130 into a plurality of groups according to the number of multiplexers. The implementation of step S710 is the same as step S210, and details are not described herein again.

Next, the multiplexer driving method 700 executes step S720 to determine whether the grayscale value of the first frame picture corresponding to each sub-pixel in each group is the same as the grayscale value of the second frame picture. Please refer to FIG. 8 together, which is a schematic diagram of a part of the display device 100 according to an embodiment of the present disclosure. Figure 8 has a first group and a second group. The first group of gate lines GL (1) has {subpixel P111, subpixel P121}, a total of 2 subpixels, and the gate line GL (1 The second group of) has {subpixel P211, subpixel P221} 2 subpixels; the first group of gate line GL (2) has {subpixel P112, subpixel P122} total 2 Subpixels, the second group of gate lines GL (2) has {subpixel P212, subpixel P222}, a total of 2 subpixels. For example, suppose the grayscale value of the two subpixels P111 and P121 of the first group in the first frame is {50,50}, and the grayscale value of the second frame is {50,50}. the first The first frame picture and the second frame picture of the two sub-pixels P111 and P121 of the group are the same. Assume that the grayscale value of the two sub-pixels P211 and P221 in the second group is {100,50} in the first frame, and the grayscale value in the second frame is {100,50}, so that the second group The first frame picture and the second frame picture of the two sub-pixels P211 and P221 are the same.

Next, the multiplexer driving method 700 executes step S721 to generate a first determination result corresponding to each group. Continuing the above embodiment, the first frame picture and the second frame picture of the sub-pixel P111 in the first group are the same, and the first frame picture and the second frame picture of the sub-pixel P121 in the first group are also The same, therefore, a logical OR operation is performed on the comparison result of the pixel P111 and the comparison result of the pixel P121 to generate a first judgment result corresponding to the first group. The first judgment result corresponding to the second group may also be obtained according to the foregoing description, and details are not described herein again. However, if the comparison result of any sub-pixel is different, when performing a logical OR operation, the first judgment result will also be different. Therefore, the case where step S720 is established should occur when the screen is still.

Next, the multiplexer driving method 700 executes step S730 to determine the grayscale value of each sub-pixel of the Nth-level gate line in each group and the N-1th-level gate line in each group. Whether the grayscale value of each sub-pixel is the same. As shown in the embodiment shown in FIG. 8, it is assumed that the grayscale values of the two sub-pixels P111 and P121 of the first group of the gate line GL (1) are {50,50}, and the gate line GL (1) is assumed. The grayscale values of the two sub-pixels P211 and P221 of the second group are {100,100}; the grayscale values of the two sub-pixels P112 and P122 of the first group of the gate line GL (2) are {50, 50}, assuming the second group of gate lines GL (2) The grayscale values of the two sub-pixels P212 and P222 are {100,100}. The two sub-pixels P111, P121 of the first group of the gate line GL (1) and the two sub-pixels P112, P122 of the first group of the gate line GL (2) are compared with each other, and the comparison result is the same ; Then compare the two sub-pixels P211, P221 of the first group of the gate line GL (2) with the two sub-pixels P212, P222 of the first group of the gate line GL (2), and the comparison result is For the same.

Next, the multiplexer driving method 700 executes step S731 to generate a second determination result corresponding to each group. Continuing the above embodiment, the grayscale values of the sub-pixels P112 and P111 in the first group of the gate line GL (2) are the same, and the sub-pixels P122 in the first group of the gate line GL (2) The grayscale value is the same as the pixel P121. Therefore, a logical OR operation is performed on the comparison result of the pixel P112 and the comparison result of the pixel P122 to generate a second judgment result corresponding to the first group. The second judgment result corresponding to the second group of the gate lines GL (2) can also be obtained according to the foregoing, and will not be repeated here. However, if the comparison result of any sub-pixel is different, when performing a logical OR operation, the first judgment result will also be different. Therefore, the case where step S730 is established should occur when the grayscale values of the pixels on the two gate lines before and after are the same (may be color patches of the same color).

Next, the multiplexer driving method 700 executes step S740 to control the multiplexer corresponding to each group according to the first determination result corresponding to each group and the second determination result corresponding to each group. Continuing the above embodiment, the comparison in step S720 is the comparison of the grayscale values of the sub-pixels of the current picture and the previous picture; and the comparison in step S730 is the sub-pixels of the current gate line and the previous-level gate line Comparison of grayscale values. The first group corresponding to the first A logical OR operation is performed between the first judgment result and the second judgment result. If the result is "YES", the processor 110 may use the control signal CTL to switch the switch SW1 to a non-conducting state during the data writing stage. Perform a logical or operation on the first judgment result corresponding to the second group and the second judgment result. If the result is "YES", the processor 110 can use the control signal CTL to switch SW2 during the data writing stage. Switch to non-conducting state. However, if the first judgment result and the second judgment result have a "No" result in the foregoing logical OR operation, the processor 110 will not have other additional controls on the switches SW1 and SW2, so during the data writing stage The switches SW1 and SW2 are normally opened and closed, and the processor 110 does not have additional control over the switches SW1 and SW2.

Next, if the determination of step S720 or step S730 is no, then steps S750 to S780 are performed, and the implementation of steps S750 to S780 is the same as steps S220 to S250, and details are not described herein again. The execution order of steps S720 and S730 may be reversed. It is not necessary to execute step S720 first and then step S730, and it is also possible to execute step S730 first and then step S720.

In another embodiment, the display device 100 includes a processor 110, a plurality of multiplexers 120, a plurality of sub-pixels 130, and a plurality of data lines DL. The multiplexer 120 is electrically coupled to the data line DL and the sub-pixel 130, and the processor 110 is electrically coupled to the multiplexer 120. The processor 110 is configured to determine the first enable time according to the first gray level value and the second gray level value, and determine the second enable time according to the third gray level value and the fourth gray level value. The output of the processor 110 has the first The driving signal CTL for enabling time is used to drive one of the multiplexers 120 to And output a driving signal CTL with a second enabling time to drive the other of the multiplexer 120, wherein the first enabling time is different from the second enabling time.

In summary, the multiplexer driving method of the present invention and the display panel using the same can adjust the multiplexer on time by comparing the difference between the displayed data and calculating the length of time required for liquid crystal charging. You can also dynamically adjust the gate driver circuit to turn on and off the gate driver circuit according to the total time of the multiplexer's on time, which can not only reduce the use of the source driver IC, but also ensure each sub-pixel. Both can be charged according to their respective needs, to achieve the effect of reducing the contrast of the display screen due to insufficient charging.

Certain terms are used in the description and the scope of patent applications to refer to specific elements. However, it should be understood by those with ordinary knowledge in the technical field that the same elements may be referred to by different names. The scope of the specification and patent application does not take the difference in names as a way to distinguish components, but rather uses the difference in functions of components as a basis for distinguishing. "Inclusion" mentioned in the specification and the scope of patent application is an open-ended term, so it should be interpreted as "including but not limited to". In addition, "coupled" includes any direct or indirect means of connection. Therefore, if the first element is described as being coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection or signal connection methods such as wireless transmission or optical transmission, or through other elements or connections Means are indirectly electrically or signally connected to the second element.

In addition, any singular, unless specifically stated in the specification The terms of the case also include the meaning of the plural case.

The above are only preferred embodiments of the present invention, and any equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (17)

A multiplexer driving method applied to a display device includes: dividing a plurality of data lines and a plurality of sub-pixels into a plurality of groups according to a number of multiplexers, wherein each group includes a switch, the data lines Part of the data line and part of the sub-pixels of the sub-pixels; calculating a transient value of each group according to the gray-scale value of a first frame picture and the gray-scale value of a second frame picture; calculation A liquid crystal charging time corresponding to each transient value; and an enabling time of a driving signal of the switch is determined according to the liquid crystal charging time. The method for driving a multiplexer according to claim 1, further comprising: adding up the liquid crystal charging time of each group to calculate a time sum; and determining an enabling time of a gate signal according to the time sum. The method for driving a multiplexer according to claim 1, further comprising: determining whether a grayscale value of the first frame picture and a grayscale value of the second frame picture corresponding to each sub-pixel in each group are The same; and generating a first judgment result corresponding to each group. The multiplexer driving method according to claim 3, further comprising: determining a grayscale value of each sub-pixel of the Nth-level gate line in each group and an N-1th value in each group Whether the grayscale value of each sub-pixel of the level gate line is the same; and generating a second judgment result corresponding to each group. The multiplexer driving method according to claim 4, further comprising: controlling a switch corresponding to each group according to the first determination result corresponding to each group and the second determination result corresponding to each group. The multiplexer driving method according to claim 1, wherein the transient value of each group is calculated according to the grayscale value of the first frame picture and the grayscale value of the second frame picture, further comprising: comparing each Calculating the comparison results between the grayscale value of the first frame picture and the grayscale value of the second frame picture corresponding to each sub-pixel in a group; and setting the maximum value of the comparison results to The transient value. The multiplexer driving method according to claim 1, wherein the transient value of each group is calculated according to the grayscale value of the first frame picture and the grayscale value of the second frame picture, further comprising: The grayscale values of the first frame picture corresponding to each sub-pixel in a group are averaged to calculate an average value of the first frame picture; the first pixel corresponding to each sub-pixel in each group is The grayscale values of the two frames are averaged to calculate the average value of the second frame; and the difference between the average of the first frame and the average of the second frame is set to the transient value. The multiplexer driving method according to claim 1, wherein the liquid crystal charging time corresponding to each transient value is generated through a lookup table. A display device includes: a plurality of sub-pixels; a plurality of data lines; a plurality of multiplexers, which are electrically coupled to the data lines and the sub-pixels; and a processor, which are electrically coupled to the plurality of sub-pixels A multiplexer, the processor is configured to divide the data lines and the sub-pixels into a plurality of groups according to a number of multiplexers, wherein each group includes a switch of the multiplexers, the data Part of the data line of the line and some sub-pixels of the sub-pixels, calculate a transient value of each group according to the gray-scale value of a first frame picture and the gray-scale value of a second frame picture, Then, a liquid crystal charging time corresponding to each transient value is calculated, and an enabling time of a driving signal of the switch is determined according to the liquid crystal charging time. The display device according to claim 9, wherein the processor is further configured to sum up the liquid crystal charging time of each group, calculate a time summation, and use the time summation to determine a gate signal enable time. . The display device according to claim 9, wherein the processor is further configured to perform the following steps: determine the grayscale value of the first frame picture corresponding to each sub-pixel in each group and the second frame picture Whether the grayscale values of are the same; and generate a first judgment result corresponding to each group. The display device according to claim 11, wherein the processor is further configured to perform the following steps: determine the grayscale value of each sub-pixel of the N-th data line in each group and the Whether the grayscale value of each sub-pixel of the N-1 level data line is the same; and generating a second judgment result corresponding to each group. The display device according to claim 12, wherein the processor is further configured to perform the following steps: controlling each group according to the first judgment result corresponding to each group and the second judgment result corresponding to each group. Corresponding switch. The display device according to claim 9, wherein the processor is further configured to perform the following steps: compare the grayscale value of the first frame picture corresponding to each sub-pixel in each group with the second frame picture To calculate the grayscale value of the multiple comparison results; and set the maximum value of the comparison results to the transient value. The display device according to claim 9, wherein the processor is further configured to perform the following steps: average the grayscale values of the first frame picture corresponding to each sub-pixel in each group to calculate a first The average value of one frame; averaging the grayscale value of the second frame of the picture corresponding to each sub-pixel in each group to calculate the average value of the second frame of pictures; and setting the first frame of pictures The difference between the average value of and the average value of the second frame picture is the transient value. The display device according to claim 9, wherein the liquid crystal charging time corresponding to each transient value is generated through a lookup table. A display device includes: a plurality of sub-pixels; a plurality of data lines; a plurality of multiplexers electrically coupled to the data lines and the sub-pixels, wherein the data lines are connected according to a number of multiplexers And the sub-pixels are divided into a plurality of groups, each group including a switch of the multiplexers; and a processor electrically coupled to the multiplexers, the processor is configured to The gray level value and a second gray level value determine a first enabling time, and a second enabling time is determined according to a third gray level value and a fourth gray level value. The processor output has the first enabling time. The driving signal of time drives the switch of one of the groups, and outputs the driving signal of the second enabling time to drive the switch of the other of the groups; wherein the first The enabling time is different from the second enabling time.