TWI386905B - Display apparatus and driving method thereof - Google Patents

Description

Display device and driving method thereof

The present invention relates to a display device and a method of driving the same.

With the development of display technology, display devices have been widely used, and liquid crystal display devices have gradually replaced conventional cathode ray tube display devices due to their superior characteristics such as slimness, low power consumption, and no radiation, and are applied to many In the category of electronic products.

In general, in order to enhance the edge contrast of the dynamic picture displayed by the liquid crystal display device, the operator replaces a target display grayscale value with an overdrive value for the pixel that needs to be improved in comparison in the display device. For example, as shown in FIG. 1 , in the frame distance t ₁ , the gray scale value is replaced by the overdrive value, so that the gray scale brightness V ₀ displayed on the screen exceeds the target gray scale brightness V _{T .} To increase the dynamic picture edge contrast.

However, since the reaction rate of the liquid crystal of the liquid crystal display device is limited, when the liquid crystal reaction is not fast enough, the residence time T _D will be made too long, resulting in an excessively bright bright band at the edge of the dynamic picture.

Therefore, how to provide a display device and a driving method thereof that can increase the edge contrast of a dynamic picture is one of the important topics in the current display industry.

In view of the above problems, the object of the present invention is to provide an increase A display device for dynamic picture edge contrast and a driving method thereof.

In order to achieve the above object, a driving method of a display device according to the present invention, wherein the display device receives one of a first display grayscale value of a pixel and a second display grayscale value of a pixel in time sequence, and displays The device has at least one drive unit and a pixel array. The driving method comprises the following steps: firstly, selecting, according to the first display grayscale value and the second display grayscale value, an overdrive value to the driving unit according to the first display grayscale value and the second display grayscale value to drive in a first time interval a pixel array, and determining whether the first display grayscale value and the second display grayscale value correspond to a compensation region of a compensation comparison table; then, when the first display grayscale value and the second display grayscale value correspond to When compensating the compensation area of the comparison table, a compensation driving value is outputted to the driving unit to drive the pixel array within a second time interval.

In addition, in order to achieve the above object, a display device according to the present invention receives a first display grayscale value of a pixel and a second display grayscale value of a pixel in time sequence, and the display device includes a driving unit. A pixel array and a contrast enhancement module. The pixel array is electrically connected to the driving unit; the contrast strengthening module is electrically connected to the driving unit, wherein the contrast strengthening module is within a first time interval, according to the first display gray level value and the second display gray level The value is selected from the overdrive comparison table and outputs an overdrive value to the driving unit to drive the pixel array, and determines whether the first display grayscale value and the second display grayscale value correspond to one of the compensation alignment tables. a compensation area, wherein when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, a compensation driving value is output to the driving unit to drive the pixel in a second time interval Array.

According to the display device and the driving method thereof, when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, the second time interval is The output compensates the driving value to the driving unit to drive the pixel array to reduce the residence time, so that the liquid crystal molecules can quickly return to the normal position to display the normal grayscale value, thereby improving the dynamic image edge contrast.

Hereinafter, a display device and a driving method thereof according to a preferred embodiment of the present invention will be described with reference to the related drawings.

A driving method of a display device according to a preferred embodiment of the present invention, wherein the display device has at least one driving unit and a pixel array, and receives one of the pixels in the chronological order, the zeroth display grayscale value, and the first A grayscale value, a second display grayscale value, and a third display grayscale value are displayed. In this embodiment, the display device is exemplified by a liquid crystal display device. In addition, one of the zeroth time interval, the first time interval, and the second time interval is exemplified by a chronological relationship, and the zeroth time interval, the first time interval, or the second time interval is at least one. Frame time interval. In this embodiment, the zeroth time interval, the first time interval, or the second time interval are each taken as an example of a frame time interval.

Referring to FIG. 2, the driving method includes steps S100 to S130. Step S100 is to be within the first time interval, and output an overdrive value to the driving unit from the overdrive comparison table according to the first display grayscale value and the second display grayscale value to drive the pixel array. Wherein, the overdrive comparison table can be recorded in one of the display devices.

Step S110 is to determine whether the first display grayscale value and the second display grayscale value correspond to one compensation region of a compensation comparison table within the first time interval. Wherein, when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, step S120 is performed, and when the first display grayscale value and the second display grayscale value do not correspond to When the compensation area of the compensation comparison table (also corresponding to one of the compensation comparison table non-compensation areas) is performed, step S130 is performed. In this embodiment, the compensation comparison table can be recorded in the comparison unit of the display device. In addition, the range of the compensation area of the compensation comparison table and the corresponding compensation driving value can be designed according to the degree of contrast enhancement of the dynamic picture required by the operator or the liquid crystal reaction rate. Taking a display device with a gray scale value ranging from 0 to 255 as an example, since the problem of excessive retention time in the prior art is more common in the case of changing from a low display grayscale value to a higher display grayscale value, for example, as needed. It can only compensate for the situation that the first display grayscale value changes from 0 to 128 to the second display grayscale value is between 128 and 191. At this time, the compensation comparison table only needs to record the compensation drive required in the above situation. value. Furthermore, in this example, if the first display grayscale value and the second display grayscale value are not changed from 0 to 128 to between 128 and 191, the change of the grayscale value is uncompensated. For the zone, the compensation drive value corresponding to the non-compensation zone of the compensation comparison table can be set to an arbitrary value, for example, 0.

Step S120 is to be in the second time interval, and output a compensation driving value to the driving unit to drive the pixel array, wherein the compensation driving value may be based on the first display gray level value within the first time interval or the second time interval. The second display gray scale value is generated in the self-compensation comparison table. In this embodiment, the compensation driving value is self-compensated according to the first display grayscale value and the second display grayscale value in the first time interval. The comparison table is generated, and then the compensation driving value is output to the driving unit in the second time interval to drive the pixel array to reduce the residence time, thereby improving the dynamic picture edge contrast.

Step S130 is to select an overdrive value from the overdrive comparison table to the driving unit to drive the pixel array according to the second display grayscale value and the third display grayscale value according to the second display grayscale value and the third display grayscale value.

In addition, as shown in FIG. 3, the driving method further includes steps S140 to S150. Step S140 is to determine whether the zeroth display grayscale value and the first display grayscale value correspond to the compensation zone of the compensation comparison table within the zeroth time interval. Wherein, when the zeroth display grayscale value and the first display grayscale value do not correspond to the compensation zone of the compensation comparison table, step S100 is performed, and when the zeroth display grayscale value and the first display grayscale value correspond to When the compensation zone of the comparison table is compensated, step S150 is performed.

Step S150 is performed within a first time interval, and outputs a compensation driving value to the driving unit to drive the pixel array, wherein the compensation driving value can display the grayscale value according to the zeroth in the zeroth time interval or the first time interval. The first display gray scale value is generated in the self-compensation comparison table. In this embodiment, the compensation driving value is generated in the self-compensation comparison table according to the zeroth display grayscale value and the first display grayscale value in the zeroth time interval, and then the compensation driving value is in the first time interval. Output to the drive unit to drive the pixel array.

According to the driving method of the display device, when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, the compensation driving value is output to the driving in the second time interval. The unit drives the pixel array to reduce the residence time of the liquid crystal molecules, thereby increasing the edge of the dynamic picture Compared.

In addition, referring to FIG. 4, the driving method further includes steps S160 to S210. First, when the result of the step S140 is that the zeroth display grayscale value and the first display grayscale value do not correspond to the compensation zone of the compensation comparison zone, step S160 is performed. Step S160 is performed within the first time interval to determine whether the first display grayscale value is the same as the second display grayscale value. Wherein, when the first display grayscale value is the same as the second display grayscale value, step S170 is performed, and when the first display grayscale value is different from the second display grayscale value, step S100 is performed.

Step S170 is to output a second display grayscale value to the driving unit to drive the pixel array display screen within the first time interval. In addition, step S100 has been described in detail above, and is not described here.

After the step S100 or the step S170 is completed, the process proceeds to step S110, where it is determined whether the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table. Wherein, when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, step S180 is performed, and when the first display grayscale value and the second display grayscale value do not correspond to When the compensation area of the comparison table is compensated, step S200 is performed.

Step S180 is performed within the second time interval to determine whether the compensation driving value is the same as the third display gray level value. Wherein, when the compensation driving value is the same as the third display grayscale value, step S190 is performed, and when the compensation driving value is different from the third display grayscale value, step S120 is performed.

Step S200 is performed within the second time interval to determine whether the second display grayscale value is the same as the third display grayscale value. Wherein, when the second display grayscale value and the first When the three display grayscale values are the same, step S210 is performed, and when the second display grayscale value is not the same as the third display grayscale value, step S130 is performed.

Step S190 is to be within the second time interval, and output a third display grayscale value to the driving unit to drive the pixel array display screen. Step S210 is to be within the second time interval, and output a third display grayscale value to the driving unit to drive the pixel array display screen. In addition, step S120 and step S130 have been described in detail above, and are not described herein.

In order to clarify the present invention, a display device in accordance with a preferred embodiment of the present invention will be described below. Referring to FIG. 5, the display device 2 has a driving unit 21, a pixel array 22 and a contrast strengthening module 23. The comparison enhancement module 23 has a receiving unit 231, a mapping unit 232, a comparison unit 233, a determination unit 234, a buffer control unit 235, and three selection units 236, 237, 238.

The receiving unit 231 is electrically connected to the mapping unit 232 and the selecting unit 238 respectively; the mapping unit 232 is electrically connected to the comparing unit 233, the determining unit 234 and the selecting unit 236, respectively; the selecting unit 236 is respectively connected to the comparing unit 233, The determining unit 234 and the buffering control unit 235 are electrically connected; the buffering control unit 235 is electrically connected to the comparing unit 233, the determining unit 234 and the selecting unit 237, respectively; the determining unit 234 is electrically connected to the selecting unit 238; The 233 is electrically connected to the selection unit 237; the selection unit 237 is electrically connected to the selection unit 238; and the drive unit 21 is electrically connected to the selection unit 238 and the pixel array 22, respectively.

In the present embodiment, the comparison unit 233 has an overdrive comparison table L ₁ and a compensation comparison table L ₂ . In addition, the selection units 236, 237, and 238 are respectively exemplified by a multiplexer.

The receiving unit 231 can receive, in time sequence, a zeroth display grayscale value, a first display grayscale value, a second display grayscale value, and a third display grayscale value, etc., as a receiving unit 231. the received data D _R, D _R and outputs the data to the mapping unit 232 and selection unit 238. In this embodiment, the data D _R may be a zeroth display grayscale value, a first display grayscale value, a second display grayscale value, or a third display grayscale value, respectively, within different time intervals.

The mapping unit 232 can reduce the resolution of the data D _R to the selection unit 236, the comparison unit 233, and the determination unit 234, respectively, to reduce the subsequent operation cost.

The comparison unit 233 outputs an overdrive value OD ₁ to the selection unit 237 from the overdrive comparison table L ₁ according to the data D _R and the data D _B output by the buffer control unit 235, and according to the data D _R and The data D _B self-compensation comparison table L ₂ outputs a compensation drive value OD ₂ to the selection unit 236.

The judging unit 234 judges whether the data D _R and the data D _B correspond to the compensation area of the compensation comparison table. Wherein, when the data D _R and the data D _B correspond to the compensation area of the compensation comparison table, the output logic is one of the first control signals C ₁ to the selection unit 236, and the data D _R and the data D _{B are} not corresponding. When the compensation area of the comparison table is compensated, the first logic signal C ₁ to the selection unit 236 is output to logic 0.

In addition, the determining unit 234 further determines whether the data D _R and the data D _B are equal. Wherein, when the data D _R and the data D _B are equal, the output logic is one of the second control signals C ₂ to the selection unit 238, and when the data D _R and the data D _B are different, the output logic is 0. A second control signal C ₂ to the selection unit 238.

The selecting unit 236 outputs a data D ₁ and a control code C _C according to the first control signal C ₁ . When the logic of the first control signal C ₁ is 0, the data D ₁ is the data D _R , and the logic of the control code C _C is 0. When the logic of the first control signal C ₁ is 1, the data D ₁ is the compensation driving value OD ₂ , and the logic of the control code C _C is 1.

The buffer control unit 235 buffers the data D ₁ and the control code C _{C for} a time interval, and then outputs the data D _B (D _B = D ₁ ) to the comparison unit 233 and the selection unit 237, and outputs the control code C _B (C _B =C _C ) to the selection unit 237.

The selection unit 237 outputs a data D ₂ to the selection unit 238 in accordance with the control code C _B . Wherein, when the logic of the control code C _B is 0, the data D ₂ is the overdrive value OD ₁ . When the logic of the control code C _B is 1, the data D ₂ is the data D _B .

The selecting unit 238 outputs a data D ₃ to the driving unit 21 according to the second control signal C ₂ to drive the pixel array 22 to display a picture. When the logic of the second control signal is 1, the data D ₃ is the data D _R , and when the logic of the second control signal is 0, the data D ₃ is the data D ₂ .

For example, please refer to FIG. 6 and FIG. 7A to FIG. 7D. Wherein, D _R(n-2) , D _R(n-1) , D _R(n) , and D _R(n+1) are respectively displayed on the display device under the time intervals T ₂ , T ₃ , T ₄ , and T ₅ . The target shows the grayscale value, and V _T(n-2) , V _T(n-1) , V _T(n) , and V _T(n+1) are respectively represented by the time intervals T ₂ , T ₃ , and T _{4 .} , the target grayscale brightness of the picture under T ₅ .

Referring to FIG. 6 and FIG. 7A simultaneously, in the time interval T ₂ , first, the receiving unit 231 outputs the output target gray scale value D _R(n-2) to the mapping unit 232 and the selecting unit 238, respectively. Then, the mapping unit 232 lowers the resolution of the target display grayscale value D _R(n-2) to the selection unit 236, the comparison unit 233, and the determination unit 234. Again, D _R than the grayscale value of the display unit 233 according to the target line _(n-2) and a display grayscale value D _{B (n-3)} in a self-alignment overdrive Table L ₁ output overdrive value OD _{1 ( n-2)} to the selection unit 237, and displays gray level according to the target value D _{R (n-2)} and a display grayscale value D _{B (n-3)} than in self-compensating the compensation table output drive value L ₂ OD _{2 (n-2)} to the selection unit 236.

Next, the determination unit 234 determines whether the target display grayscale value D _R(n-2) and the display grayscale value D _B(n-2) correspond to the compensation zone of the compensation comparison table L ₂ . Here, the target display gray scale value D _R(n-2) and the display gray scale value D _{B(n-2) do} not correspond to the compensation region of the compensation comparison table L ₂ as an example, and the determination unit 234 outputs logic to The first control signal C _{1 (n-2) of 0 is} to the selection unit 236. In addition, the determining unit 234 determines whether the target display grayscale value D _R(n-2) and the display grayscale value D _B(n-2) are equal, and displays the grayscale value D _R(n-2) as the target and For example, the gray scale value D _{B(n-2) is} equal, and the judging unit 234 outputs the second control signal C _{2(n-2) of} logic 1 to the selecting unit 238.

The selecting unit 236 is configured to display the gray scale value D _R(n-2) and the control code C _{C(n-2) with} logic 0 according to the first control signal C _1(n-2) with logic 0 to the buffer. The control unit 235 outputs the gray scale value D _B(n-2) to the comparison unit 233 and the selection unit 237, and outputs the control code C _{B with} logic 0, after buffering the time interval (refer to the time interval T ₃ ). _(n-2) to the selection unit 237 (as shown in Fig. 7B).

Referring to FIG. 6 and FIG. 7A simultaneously, the selection unit 237 outputs the overdrive value OD _1(n-2) to the selection unit 238 according to the control code C _B(n-3) (taking logic 0 as an example). Then, the selecting unit 238 further outputs the gray scale value D _R(n-2) to the driving unit 21 to drive the pixel array 22 to display the screen according to the second control signal C _{2 (n-2) having} a logic of 1. The brightness displayed on the screen is the target grayscale brightness of V _T(n-2) (as shown in Figure 6).

Then, as shown in FIG. 6 and FIG. 7B at the same time, in the time interval T ₃ , first, the receiving unit 231 outputs the pixel display target gray scale value D _R(n-1) to the mapping unit 232 and selects respectively. Unit 238. Then, the mapping unit 232 lowers the resolution of the target display grayscale value D _R(n-1) to the selection unit 236, the comparison unit 233, and the determination unit 234. Again, D _R than the grayscale value of the display unit 233 according to the target line _(n-1) and a display grayscale value D _{B (n-2)} in a self-alignment overdrive Table L ₁ output overdrive value OD _{1 ( n-1)} to the selection unit 237, and displays gray level according to the target value D _{R (n-1)} and a display grayscale value D _{B (n-2)} than in self-compensating the compensation table output drive value L ₂ OD _{2 (n-1)} to the selection unit 236.

Next, the determination unit 234 determines whether the target display grayscale value D _R(n-1) and the display grayscale value D _B(n-2) correspond to the compensation zone of the compensation comparison table L ₂ . Here, the target display gray scale value D _R(n-1) and the display gray scale value D _B(n-2) correspond to the compensation region of the compensation comparison table L ₂ as an example, and the determination unit 234 outputs a logic of 1 The first control signal C _{1(n-1) is} to the selection unit 236. In addition, the determining unit 234 determines whether the gray scale value D _R(n-1) and the display gray scale value D _B(n-1) are equal, and displays the gray scale value D _R(n-1) and the display gray. For example, the order value D _{B(n-1) is} not equal, and the determining unit 234 outputs the second control signal C _{2(n-1) having} logic 0 to the selecting unit 238.

The selecting unit 236 outputs the compensation driving value OD _2(n-1) and the control code C _{C(n-1) of} logic ₁ to the buffer control unit according to the first control signal C _1(n-1) with logic 1 235, after buffering one time interval (referring to the time interval T ₄ ), respectively outputting the compensation driving value OD _B(n-1) to the comparison unit 233 and the selection unit 237, and outputting the control code C _{B of the} logic 1 _{(n- 1)} to the selection unit 237 (as shown in Fig. 7C).

Referring to FIG. 6 and FIG. 7B simultaneously, the selection unit 237 outputs the overdrive value OD _1(n-1) to the selection unit 238 according to the control code C _B(n-2) whose logic is 0. Then, the selecting unit 238 outputs the overdrive value OD _1(n-1) to the driving unit 21 to drive the pixel array 22 to display the screen according to the second control signal C _2(n-1) with logic 0, and causes the screen to be displayed. The displayed grayscale luminance V ₀ ' exceeds the target grayscale luminance V _T(n-1) .

Next, as shown in FIG. 6 and FIG. 7C simultaneously, in the time interval T ₄ , first, the receiving unit 231 outputs the pixel target gray scale value D _R(n) to the mapping unit 232 and the selecting unit 238, respectively. . Then, the mapping unit 232 reduces the resolution of the target display grayscale value D _R(n) to the selection unit 236, the comparison unit 233, and the determination unit 234. Then, the comparing unit 233 displays the grayscale value D _R(n) and the compensation driving value OD _B(n-1) according to the target to output the overdrive value OD _1(n) from the overdrive comparison table L ₁ to The selecting unit 237 displays the grayscale value D _R(n) and the compensation driving value OD _B(n-1) according to the target to output the compensation driving value OD _2(n) to the selecting unit 236 in the self-compensation comparison table L ₂ .

Next, the determination unit 234 determines whether the target display grayscale value D _R(n) and the compensation drive value OD _B(n-1) correspond to the compensation zone of the compensation comparison table L ₂ . Here, the display of the grayscale value D _R(n) and the compensation drive value OD _{B(n-1) does} not correspond to the compensation zone of the compensation ratio table L ₂ , and the determination unit 234 outputs the logic first to 0. Control signal C _1(n) to selection unit 236. In addition, the determining unit 234 determines whether the gray scale value D _R(n) and the compensation driving value OD _B(n-1) are equal, and displays the gray scale value D _R(n) and the compensation driving value OD _{B(n). -1) For} example, the determination unit 234 outputs the second control signal C _{2(n) having a} logic of 0 to the selection unit 238.

The selecting unit 236 outputs a grayscale value D _R(n) and a logic control code C _C(n) to the buffer control unit 235 according to the first control signal C _1(n) with logic 0 to buffer the time interval. After (refer to the time interval T ₅ ), respectively output gray scale value D _B(n) to the comparison unit 233 and the selection unit 237, and output a control code C _{B(n) with a} logic of 0 to the selection unit 237 (eg Figure 7D).

Referring to FIG. 6 and FIG. 7C simultaneously, the selection unit 237 outputs the compensation drive value OD _B(n-1) to the selection unit 238 according to the control code C _{B(n-1) of} logic 1. Then, the selecting unit 238 further outputs the compensated driving value OD _B(n-1) to the driving unit 21 according to the second control signal C _2(n) with a logic of 0 to drive the pixel array 22 to display the picture. After the residence time T _D ', the brightness displayed on the screen is the target gray scale brightness is V _T(n) (as shown in FIG. 6 ), wherein the retention time T _D ' is lower than the conventional retention time T _D , thereby improving the dynamics The edge of the picture is contrasted.

Finally, please refer to FIG. 6 and FIG. 7D simultaneously. In the time interval T ₅ , first, the receiving unit 231 outputs the pixel display gray scale value D _{R(n+1) of the} pixel to the mapping unit 232 and selects respectively. Unit 238. Then, the mapping unit 232 reduces the resolution of the target display grayscale value D _R(n+1) to the selection unit 236, the comparison unit 233, and the determination unit 234. Then, the comparison unit 233 displays the grayscale value D _R(n+1) and the display grayscale value D _B(n) according to the target to output the overdrive value OD _{1 (n+ )} from the overdrive comparison table L ₁ . ₁₎ to the selection unit 237, and displays gray level according to the target value D _{R (n + 1)} and a display grayscale value D _{B (n)} to compensate for self-alignment of the compensation table output drive value L ₂ OD _{2 (n + 2 )} to the selection unit 236.

Next, the determination unit 234 determines whether the target display grayscale value D _R(n+1) and the display grayscale value D _B(n) correspond to the compensation zone of the compensation comparison table L ₂ . Here, the target display gray scale value D _R(n+1) and the display gray scale value D _{B(n) do} not correspond to the compensation region of the compensation comparison table L ₂ , and the determination unit 234 outputs logic to 0. The first control signal C _{1(n+1) is} to the selection unit 236. In addition, the determining unit 234 determines whether the target display grayscale value D _R(n+1) and the display grayscale value D _B(n) are equal, and displays the grayscale value D _R(n+1) and the display gray by the target. For example, the order value D _{B(n) is} equal, and the determining unit 234 outputs the second control signal C _{2(n+1) of} logic ₁ to the selecting unit 238.

The selecting unit 236 is configured to output the target display grayscale value D _R(n+1) and the logic control code C _C(n+1) to the buffer according to the first control signal C _1(n+1) with logic 0. The control unit 235 outputs a display grayscale value D _B(n+1) to the comparison unit 233 and the selection unit 237, and outputs a control code C _{B with a} logic of 1 after buffering a time interval (not shown). _n+1) to the selection unit 237 (not shown).

The selection unit 237 outputs the overdrive value OD _1(n-1) to the selection unit 238 in accordance with the control code C _{B(n+1) of} logic 0. Then, the selecting unit 238 further outputs the gray scale value S _R(n+1) to the driving unit 21 to drive the pixel array 22 to display the screen according to the second control signal C _{2(n+1) of} logic 1. The brightness displayed on the screen is the target grayscale brightness of V _T(n+1) (as shown in Figure 6).

In summary, the display device and the driving method thereof according to the present invention are when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, then within the second time interval, The output compensates the drive value to the drive unit to drive the pixel array to reduce the residence time, thereby improving dynamic picture edge contrast.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

2‧‧‧Display device

21‧‧‧ drive unit

22‧‧‧ pixel array

23‧‧‧Comparative Strengthening Module

231‧‧‧ receiving unit

232‧‧‧ mapping unit

233‧‧‧ comparison unit

234‧‧‧judging unit

235‧‧‧buffer control unit

236, 237, 238‧‧‧Selection unit

C ₁ , C _1(n-2) , C _1(n-1) , C _1(n) , C _1(n+1) ‧‧‧ first control signal

C ₂ , C _2(n-2) , C _2(n-1) , C _2(n) , C _2(n+1) ‧‧‧second control signal

C _C , C _C(n-2) , C _C(n-1) , C _C(n) , C _C(n+1) ‧‧‧ control code

D ₁ , D ₂ , D ₃ , D _B , D _R ‧‧‧ Information

D _R(n-2) , D _R(n-1) , D _R(n) , D _R(n+1) ‧‧‧ Targets show grayscale values

D _B(n-3) , D _B(n-2) , D _B(n) ‧‧‧ shows grayscale values

L ₁ ‧‧‧Overdrive comparison table

L ₂ ‧‧‧Compensation comparison table

OD ₁ , OD _1(n-2) , OD _1(n-1) , OD _1(n) , OD _1(n+1) ‧‧‧Overdrive value

OD ₂ , OD _2(n-2) , OD _2(n-1) , OD _2(n) , OD _2(n+1) ‧‧‧compensation drive value

S100~S210‧‧‧Steps for driving the display device

t ₁ ‧‧‧ frame time interval

T _D , T _D '‧‧‧ detention time

T ₂ , T ₃ , T ₄ , T ₅ ‧‧ ‧

V ₀ , V ₀ '‧‧‧ gray scale brightness

V _T , V _T(n-2) , V _T(n-1) , V _T(n) , V _T(n+1) ‧‧‧target gray scale brightness

1 is a view showing a relationship between gray scale brightness and time displayed on a screen in a conventional liquid crystal display device; FIG. 2 to FIG. 4 are diagrams showing a driving method of a display device according to a preferred embodiment of the present invention; FIG. 5 is a view showing a preferred embodiment of the present invention; The display device of the embodiment; FIG. 6 is a view showing the relationship between the gray scale brightness and the time displayed on the screen in the display device according to the preferred embodiment of the present invention; and FIG. 7A to FIG. 7D show the display device in different time intervals of FIG. The state of action.

S100~S130‧‧‧Steps for driving the display device

Claims (23)

A driving method of a display device, wherein the display device receives one of a first display grayscale value of a pixel and a second display grayscale value of the pixel in time sequence, and the display device has at least one driving unit And a pixel array, the driving method includes the following steps: outputting an overdrive value from an overdrive comparison table according to the first display grayscale value and the second display grayscale value in a first time interval Go to the driving unit to drive the pixel array, and determine whether the first display grayscale value and the second display grayscale value correspond to a compensation region of a compensation comparison table; and when the first display grayscale value And when the second display grayscale value corresponds to the compensation zone of the compensation comparison table, a compensation driving value is outputted to the driving unit to drive the pixel array in a second time interval. The driving method of the display device according to claim 1, wherein the first time interval and the second time interval are in a temporally sequential relationship. The driving method of the display device according to claim 1, wherein the first time interval or the second time interval is at least one frame time interval. The driving method of the display device according to the first aspect of the invention, wherein the first time interval further comprises: a self-compensation comparison table according to the first display grayscale value and the second display grayscale value This compensation drive value is generated. The driving method of the display device according to claim 4, wherein when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, Within a short period of time A buffer control unit stores the compensation drive value, and within the second time interval, the compensation drive value is output by the buffer control unit. The driving method of the display device according to claim 1, wherein the overdrive comparison table and the compensation comparison table are recorded in one of the display devices. The driving method of the display device according to the first aspect of the invention, further comprising: determining whether the first display grayscale value and the second display grayscale value are equal. The driving method of the display device of claim 7, wherein the first display grayscale value and the second display grayscale value are not equal, according to the first display grayscale value and the second display The gray scale value outputs the overdrive value to the driving unit from the overdrive comparison table to drive the pixel array, and determines whether the first display grayscale value and the second display grayscale value correspond to the compensation ratio The compensation area for the table. The driving method of the display device of claim 7, wherein when the first display grayscale value and the second display grayscale value are equal, the second display grayscale value is output to the driving unit to drive The pixel array determines whether the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table. The driving method of the display device according to claim 1, wherein the compensation zone of the compensation comparison table is associated with a dynamic picture contrast enhancement degree. The driving method of the display device according to claim 1, Wherein the display device is a liquid crystal display device, and the compensation region of the compensation comparison table is associated with a liquid crystal reaction rate or a dynamic picture contrast enhancement degree. A display device for receiving, in chronological order, a first display grayscale value of a pixel and a second display grayscale value of the pixel, and the display device comprises: a driving unit; a pixel array, And electrically connected to the driving unit; and a contrast strengthening module electrically connected to the driving unit, wherein the contrast strengthening module is within a first time interval, according to the first display grayscale value and The second display grayscale value outputs an overdrive value from the overdrive comparison table to the driving unit to drive the pixel array, and determines whether the first display grayscale value and the second display grayscale value correspond to And a compensation area of the compensation comparison table, wherein when the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table, then within a second time interval, A compensation drive value is output to the drive unit to drive the pixel array. The display device of claim 12, wherein the contrast enhancement module comprises: a comparison unit having the overdrive comparison table, and within the first time interval, according to the first Displaying the grayscale value and the second display grayscale value from the overdrive comparison table to output the overdrive value; and a first determining unit determining the first display grayscale value and the second display grayscale Whether the value corresponds to the compensation of the compensation comparison table Area. The display device of claim 13, wherein the comparison unit further has the compensation comparison table, and within the first time interval, the comparison unit is configured according to the first display grayscale value and the first The second display gray scale value generates the compensation drive value from the compensation comparison table. The display device of claim 14, wherein the contrast enhancement module further has a buffer control unit, wherein the first display grayscale value and the second display grayscale value correspond to the compensation comparison table In the compensation zone, the buffer control unit stores the compensation drive value in the first time interval, and outputs the compensation drive value in the second time interval. The display device of claim 12, wherein the first time interval and the second time interval are in a temporally sequential relationship. The display device of claim 12, wherein the first time interval or the second time interval is at least one frame time interval. The display device of claim 12, wherein the contrast enhancement module further comprises a second determining unit that determines the first display grayscale value and the second display gray in the first time interval Whether the order values are equal. The display device of claim 18, wherein when the first display grayscale value and the second display grayscale value are not equal, the comparison unit is based on the first display grayscale value and the The second display grayscale value is outputted from the overdrive comparison table, and the first determining unit determines whether the first display grayscale value and the second display grayscale value correspond to the compensation ratio The compensation area for the table. The display device of claim 18, wherein the contrast enhancement module outputs the second display grayscale value to the driver when the first display grayscale value and the second display grayscale value are equal The unit drives the pixel array, and the first determining unit determines whether the first display grayscale value and the second display grayscale value correspond to the compensation zone of the compensation comparison table. The display device of claim 12, wherein the compensation zone of the compensation comparison table is associated with a degree of dynamic picture contrast enhancement. The display device according to claim 12, which is a liquid crystal display device. The display device of claim 22, wherein the compensation zone of the compensation comparison table is associated with a liquid crystal reaction rate or a dynamic picture contrast enhancement degree.