CN101308631A - Driving unit with time schedule controller and driving method thereof - Google Patents

Abstract

A driving method for shortening the response time of liquid crystal is applied to a display and comprises the following steps. First, the previous original frame data and the current original frame data are provided to the buffer. Then, according to the previous original frame data and the current original frame data, the first and second previous adjusted frame data and the first and second current adjusted frame data are output respectively. And then, according to the first previous adjusted frame data and the first current adjusted frame data, referring to the table to output the first current overdrive frame data to the source driver, and after a fixed time, outputting the first current overdrive frame data to the source driver again.

Description

Driving unit with timing controller and driving method thereof

technical field

The invention relates to a timing controller, and in particular to a timing controller for improving liquid crystal response time.

Background technique

In a monitor with a frame update frequency of 60Hz, each frame is displayed for approximately 16.67ms. In traditional liquid crystal displays, in order to speed up the response time of liquid crystal molecules, liquid crystal displays using 120Hz as the frame update frequency have come out. By increasing the update frequency of the frame, the charging frequency of the pixel electrode of each pixel unit in the liquid crystal display can be increased, so as to speed up the response time of the liquid crystal molecules. In order to further speed up the response speed of the liquid crystal, the overdrive driving method has been applied to the above-mentioned liquid crystal display with 120 Hz as the frame update frequency.

Referring to FIG. 1A , it shows a related schematic diagram of traditional two 60Hz frame data and multiple 120Hz frame data. Now, a 60Hz frame period T(n) for displaying a 60Hz frame is divided into two 120Hz frame periods TS1(n) and TS2(n) as an example for illustration. The timing controller of the liquid crystal display generates 120 Hz frame data FD1(n) displayed on the liquid crystal display within the frame periods TS1(n) and TS2(n) respectively according to the received 60Hz frame data D(n) corresponding to a certain pixel ) and FD2(n). The 120 Hz frame data FD1(n) and FD2(n) before using the overdrive driving method are the same.

The traditional timing controller judges whether two adjacent 120Hz frame data are equal after every 120Hz frame period, and if not, replaces the 120Hz frame data with 120Hz Over Drive (OD) data. In Figure 1A, since the 120Hz frame data FD1(n) is different from FD2(n-1), the timing controller will replace the 120Hz frame data FD1(n) with 120Hz overdrive frame data OD1(n) to output to the source driver. Since the 120Hz frame data FD1(n) is the same as FD2(n), the timing controller will directly output the 120Hz frame data FD2(n) to the source driver. However, compared with the liquid crystal display with a frame update frequency of 60 Hz, when the frame update frequency is increased to 120 Hz, the time for the overdrive voltage corresponding to the overdrive frame data OD1(n) to be maintained on the pixel electrode will be shortened to two one-third. Therefore, when the grayscale values of two adjacent 120Hz frame data are very different, the pixel electrode will be maintained at the overdrive voltage for too short a time, so that the response time of the liquid crystal molecules will increase instead of decrease, and the display will does not display well.

Referring to FIG. 1B , it shows that when the frame update frequency is increased to 120 Hz, the liquid crystal molecule reaction time in the liquid crystal display is longer than when the frame update frequency is 60 Hz. In FIG. 1B , the vertical axis and the horizontal axis respectively represent the grayscale value of the 60Hz frame data D(n−1) and the grayscale value of the 60Hz frame data D(n). Regions 102 and 104 are the grayscale value regions where the response time of liquid crystal molecules is longer when the frame update frequency is 120 Hz than when the frame update frequency is 60 Hz. As a result of the increase in the reaction time of the liquid crystal molecules, the pixels cannot achieve the desired brightness, which reduces the display quality of the picture.

Contents of the invention

In view of this, the object of the present invention is to provide a driving unit with a timing controller and a driving method thereof, which can effectively solve the problem of too long reaction time of the liquid crystal molecules in the above-mentioned regions 102 and 104, so as to improve the picture quality .

According to the object of the present invention, a driving unit is proposed, which is applied to a display. The display includes source drivers. The drive unit includes a buffer (Buffer) and a timing controller (TimingController). The buffer is used to store the previous original frame data and the current original frame data, and generate the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and generate the first current adjusted frame data according to the current original frame data data and the second current adjusted frame data. The timing controller includes a first overdrive data generation unit, a second overdrive data generation unit and a delay unit. The first overdrive data generation unit is used to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to the first table to output the first current overdrive (Over Drive, OD) frame data to the source driver. The second overdrive data generating unit is used for receiving the second previously adjusted frame data and the second current adjusted frame data, and referring to the second table to output the second current overdrive frame data. The delay unit is used for receiving the second overdrive frame data, delaying the second current overdrive frame data for a fixed time, and outputting the second current overdrive frame data to the source driver.

According to the purpose of the present invention, another driving unit is proposed, which is applied to a display. The display includes source drivers. The drive unit includes a buffer and a timing controller. The buffer is used to store the previous original frame data and the current original frame data, and generate the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and generate the first current adjusted frame data according to the current original frame data data and the second current adjusted frame data. The timing controller is used for judging whether the relationship between the previous original frame data and the current original frame data is within a preset range. If so, according to the first previously adjusted frame data and the first current adjusted frame data, refer to the table to output the first current overdrive frame data to the source driver, and output the first current overdrive frame data again after a fixed time. Drive frame data to source driver. If not, according to the first previously adjusted frame data and the first current adjusted frame data, refer to the table to output the first current overdrive frame data to the source driver, and output the second current adjusted frame data after a fixed time Frame data to source driver.

According to the object of the present invention, another driving unit is proposed, which is applied to a display. The display includes source drivers. The drive unit includes a buffer and a timing controller. The buffer is used to store the previous original frame data and the current original frame data, and generate the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and generate the first current adjusted frame data according to the current original frame data data and the second current adjusted frame data. The timing controller includes an overdrive data generation unit and a delay unit. The overdrive data generation unit is used to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to the table to output the first current overdrive frame data to the source driver. The delay unit is used to receive the first current overdrive frame data, and output the first current overdrive frame data to the source driver again after a fixed time.

According to another object of the present invention, a driving method for shortening the liquid crystal response time is proposed, and the driving method is applied to a display. The display includes a source driver and a driving unit, and the driving unit includes a buffer and a timing controller. The timing controller includes a first overdrive data generation unit, a second overdrive data generation unit and a delay unit. This driving method includes the following steps. Firstly, the previous original frame data and the current original frame data are provided to the buffer. Then, according to the previous original frame data and the current original frame data, the first previously adjusted frame data and the second previously adjusted frame data, and the first current adjusted frame data and the second current adjusted frame data are respectively output. Furthermore, according to the first previously adjusted frame data and the first current adjusted frame data, and referring to the first table, the first current overdrive frame data is output to the source driver. Then, according to the second previously adjusted frame data and the second current adjusted frame data, and referring to the second table, the second current overdrive frame data is output. Afterwards, the second current overdrive frame data is delayed for a fixed time before being input to the source driver.

According to another object of the present invention, a driving method for shortening the liquid crystal response time is proposed, and the driving method is applied in a display. The display includes a source driver and a driving unit, and the driving unit includes a buffer and a timing controller. This driving method includes the following steps. Firstly, the previous original frame data and the current original frame data are provided to the buffer. Then, the first previously adjusted frame data and the second previously adjusted frame data, and the first current adjusted frame data and the second current adjusted frame data are respectively output according to the previous original frame data and the current original frame data. Furthermore, it is determined whether the relationship between the previous original frame data and the current original frame data is within a preset range. Afterwards, when the relationship between the previous original frame data and the current original frame data is within a preset range, output the first current overdrive according to the first previous adjusted frame data and the first current adjusted frame data, and refer to the table The frame data is sent to the source driver, and after a fixed time, the first current overdrive frame data is output to the source driver again.

According to another object of the present invention, a driving method for shortening the liquid crystal response time is proposed, and the driving method is applied to a display. The display includes a source driver and a driving unit, and the driving unit includes a buffer and a timing controller. This driving method includes the following steps. Firstly, the previous original frame data and the current original frame data are provided to the buffer. Then, the first previously adjusted frame data and the second previously adjusted frame data, and the first current adjusted frame data and the second current adjusted frame data are respectively output according to the previous original frame data and the current original frame data. After that, output the first current overdrive frame data to the source driver according to the first previously adjusted frame data and the first current adjusted frame data, and refer to the table, and output the first current overdrive frame data again after a fixed time Drive frame data to source driver.

In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, preferred embodiments are exemplified below and described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1A shows a related schematic diagram of traditional two 60Hz frame data and multiple 120Hz frame data;

Figure 1B shows that when the update frequency of the frame is increased to 120Hz, the response time of the liquid crystal molecules in the liquid crystal display is longer than when the update frequency of the picture is 60Hz; the gray scale value area;

FIG. 2A shows a circuit block diagram of a liquid crystal display according to an embodiment of the present invention;

FIG. 2B shows a detailed circuit diagram of the drive unit 202 of FIG. 2A;

Fig. 2C shows the relationship diagram of the frame period of each frame data of Fig. 2B;

FIG. 3 shows a flowchart of a driving method of the driving unit 202 of FIG. 2A;

FIG. 4A shows a circuit diagram of a liquid crystal display according to a second embodiment of the present invention;

FIG. 4B shows a detailed circuit diagram of the drive unit 402 of FIG. 4A;

FIG. 5 shows a flowchart of a driving method of the driving unit 402 of FIG. 4A;

FIG. 6A shows a circuit diagram of a liquid crystal display according to a third embodiment of the present invention;

FIG. 6B shows a detailed circuit diagram of the drive unit 602 of FIG. 6A;

FIG. 6C shows a schematic diagram of the output frame data SO(n) of the driving unit 602 in FIG. 6A when the received previous and current original frame data F(n) and F(n-1) fall within a preset range. ;

FIG. 6D shows when the received previous and current original frame data F(n) and F(n-1) fall outside the preset range, the output frame data SO(n) of the driving unit 602 in FIG. 6A schematic diagram; and

FIG. 7 shows a flow chart of the driving method of the driving unit 602 in FIG. 6A .

[Description of main component symbols]

D(n), D(n-1), FD1(n), FD2(n), FD1(n-1), FD2(n-1): frame data

T(n), T(n-1), TS1(n), TS2(n), TS1(n-1), TS2(n-1), T'(n), T'(n-1), TS1'(n), TS1'(n-1), TS2'(n), TS2'(n-1): frame period

102～104: area

200, 400, 600: LCD display

202, 402, 602: drive unit

2021, 4021, 6021: timing controller

20211: The first overdrive data generation unit

20212: The second overdrive data generation unit

20213, 40212: delay unit

2022, 4022, 6022: Buffer

2023, 4023, 6023: memory

204, 404, 604: source driver

206, 406, 606: gate driver

208, 408, 608: LCD panel

40211: Overdrive Data Generation Unit

SD1～SDn: data signal

SC1～SCm: scan signal

SO(n): output frame data

F(n-1): previous original frame data

F(n): current original frame data

F1(n-1): the first previously adjusted frame signal

F2(n-1): second previously adjusted frame signal

F1(n): the first current adjusted frame data

F2(n): second current adjusted frame data

SOD1(n): first current overdrive frame data

SOD2(n): second current overdrive frame data

302～310, 502～506, 702～710: Operation steps

Detailed ways

The drive unit of the present invention prolongs the time for the pixel electrode to maintain the overdrive voltage by outputting one or more overdrive frame data when the update frequency of the frame is increased, so as to solve the problem that the pixel brightness is insufficient in the traditional method and the pixel quality is affected .

first embodiment

Referring to FIG. 2A , it shows a circuit block diagram of a liquid crystal display according to an embodiment of the present invention. The liquid crystal display 200 includes: a driving unit 202 , a source driver 204 , a gate driver 206 and a liquid crystal display panel 208 . The driving unit 202 is coupled to the source driver 204 to output the frame data SO(n) to the source driver 204 . The source driver 204 outputs data signals SD1 - SDn according to the frame data SO(n) to drive the LCD panel 208 . The gate driver 206 is also coupled to the driving unit 202 , and the gate driver 206 scans the liquid crystal display panel 208 by outputting scan signals Sc1˜Scm according to a clock signal (not shown) of the driving unit 202 . n and m are integers greater than 1.

Referring to FIG. 2B , it shows a detailed circuit diagram of the driving unit 202 of FIG. 2A . The driving unit 202 includes: a buffer 2022 , a timing controller 2021 and a memory 2023 . Wherein, the timing controller 2021 includes a first overdrive data generation unit 20211 , a second overdrive data generation unit 20212 and a delay unit 20213 . The output terminals of the first overdrive data generation unit 20211 and the delay unit 20213 are coupled to each other to output the frame data SO(n).

The buffer 2022 is used for storing previous original frame data F(n−1) and current original frame data F(n) corresponding to a certain pixel. The buffer 2022 generates the first previously adjusted frame data F1(n-1) and the second previously adjusted frame data F2(n-1) according to the previous original frame data F(n-1), and the buffer 2022 generates the first previously adjusted frame data F2(n-1) according to the current original The frame data F(n) generates first current adjusted frame data F1(n) and second current adjusted frame data F2(n).

The first overdrive data generating unit 20211 is used to receive the first previously adjusted frame data F1(n-1) and the first current adjusted frame data F1(n), and refer to the first table to output the first current overdrive (Over Drive, OD) frame data SOD1(n). The first overdrive data generation unit 20211 uses the first current overdrive frame data SOD1(n) as the output frame data SO(n), and inputs it into the source driver 204 . The second overdrive data generation unit 20212 is used to receive the second previously adjusted frame data F2(n-1) and the second current adjusted frame data F2(n), and refer to the second table to output the second current overdrive Frame data SOD2(n). The delay unit 20213 is used to receive the second overdrive frame data SOD2(n), delay the second current overdrive frame data SOD2(n) for a fixed time, and take the second current overdrive frame data SOD2(n) as an output The frame data SO(n) is input to the source driver 204 .

Referring to FIG. 2C , it shows a relationship diagram of frame periods of each frame of data in FIG. 2B . In this embodiment, the frame periods of the previous and current original frame data F(n-1) and F(n) are T'(n-1) and T'(n) respectively, and the first and second adjusted The frame periods of the frame data F1(n-1) and F2(n-1) are respectively TS1'(n-1) and TS2'(n-1), and the first and second currently adjusted frame data F1(n ) and F2(n) are respectively TS1'(n) and TS2'(n), and the length of the above fixed time is substantially equal to the frame period TS1'(n). The time lengths of the frame periods TS1'(n-1), TS2'(n-1), TS1'(n) and TS2'(n) are preferably equal to half of the frame period T'(n). The period of the output frame data SO(n) is substantially equal to half of the frame period T'(n), that is, the frequency of the output frame data SO(n) is twice that of the current original frame data F(n). However, this embodiment is not limited to two times.

Referring to FIG. 3 , it shows a flow chart of the driving method of the driving unit 202 in FIG. 2A . First, in step 302 , the previous original frame data F(n−1) and the current original frame data F(n) are provided to the buffer 2022 . Next, in step 304, the first previously adjusted frame data F1(n-1) and the second previously adjusted frame data F2(n-1) are output according to the previous original frame data F(n-1), and according to the current original The frame data F(n) outputs the first current adjusted frame data F1(n) and the second current adjusted frame data F2(n).

Furthermore, as in step 306, according to the first previously adjusted frame data F1(n-1) and the first current adjusted frame data F1(n), and referring to the first table, the first current overdrive frame data SOD1 is output (n), and input the first current overdrive frame data SOD1(n) into the source driver 204 as the output frame data SO(n). Next, as in step 308, according to the second previously adjusted frame data F2(n-1) and the second current adjusted frame data F2(n), and referring to the second table, the second current overdrive frame data SOD2( n). Afterwards, as in step 310, after delaying the second current overdrive frame data SOD2(n) for a fixed time, the second current overdrive frame data SOD2(n) is used as the output frame data SO(n) and input to the source driver 204 .

When the driving unit 202 of this embodiment doubles the frequency of the output frame data SO(n) (for example, from 60 Hz to 120 Hz), in the frame periods TS1'(n) and TS2'(n), respectively, the frequency of The first and second current overdrive frame data SOD1(n) and SOD2(n) are output to the source driver 204 as the output frame data SO(n). In this embodiment, by lengthening the time for the pixel electrode to maintain the overdrive voltage corresponding to the output frame data SO(n), it can effectively solve the problem of liquid crystal molecule reaction time occurring in regions 102 and 104 in FIG. 1B in the conventional method. Problems that are too long for the pixels to be as bright as they should be.

second embodiment

Referring to FIG. 4A and FIG. 4B , FIG. 4A shows a circuit diagram of a liquid crystal display according to a second embodiment of the present invention, and FIG. 4B shows a detailed circuit diagram of the driving unit 402 in FIG. 4A . The difference between the second embodiment and the first embodiment is that the drive unit 402 of the second embodiment only includes one overdrive data generating unit 40211 .

Referring to FIG. 5 , it shows a flow chart of the driving method of the driving unit 402 in FIG. 4A . First, in step 502 , the previous original frame data F(n−1) and the current original frame data F(n) are provided to the buffer 4022 . Next, in step 504, the first previously adjusted frame data F1(n-1) and the second previously adjusted frame data F2 are respectively output according to the previous original frame data F(n-1) and the current original frame data F(n). (n−1) and the first current adjusted frame data F1(n) and the second current adjusted frame data F2(n).

Afterwards, in step 506, according to the first previously adjusted frame data F1(n-1) and the first current adjusted frame data F1(n), and referring to the table, the first current overdrive frame data SOD1(n) is output , and use the first current overdrive frame data SOD1(n) as the output frame data SO(n), input the source driver 404; and after a fixed time, output the first current overdrive frame data SOD1(n) again , and take the first current overdrive frame data SOD1(n) as the output frame data SO(n), and input it into the source driver 404 .

The driving unit 402 of this embodiment outputs the first current overdrive frame data SOD1(n) twice in each frame period TS'(n). In this way, even if the frequency of the output frame data SO(n) is increased to twice that of the original frame data F(n), this embodiment maintains the pixel electrode at an overdrive voltage corresponding to the output frame data SO(n). Prolonging the time can also effectively solve the problem that the liquid crystal molecules in the regions 102 and 104 in FIG. 1B react for too long and the pixel cannot achieve the desired brightness in the conventional method.

third embodiment

Referring to Fig. 6A, 6B, 6C and Fig. 6D, wherein Fig. 6A shows the circuit diagram of the liquid crystal display according to the third embodiment of the present invention, Fig. 6B shows the detailed circuit diagram of the drive unit 602 of Fig. 6A, Fig. 6C and Fig. 6D respectively shows when the received previous and current original frame data F(n) and F(n-1) fall in the preset range and fall outside the preset range, the driving unit 602 in FIG. 6A Schematic diagram of the output frame data SO(n). The driving unit 602 includes a buffer 6022 , a timing controller 6021 and a memory 6023 . The difference between this embodiment and the second embodiment is that the timing controller 6021 in the drive unit 602 disclosed in this embodiment can judge the previous original frame data and the current original frame data F(n-1) and F(n) Whether the relationship is within a preset range, the preset range is preferably the areas 102 and 104 shown in FIG. 1B .

When the relationship between the previous original frame data F(n-1) and the current original frame data F(n) is within the preset range, the timing controller 6021 will adjust the frame data F1(n-1) according to the first previously adjusted frame data F1(n-1) and The first current adjusted frame data F1(n) refers to the table to output the first current overdrive frame data SOD1(n) and input the source driver 604 as the output frame data SO(n). The timing controller 6021 outputs the first current overdrive frame data SOD1(n) again after a fixed period of time as the output frame data SO(n), which is input to the source driver 604 . That is, in the frame periods TS1'(n) and TS2'(n), the driving unit 602 inputs the first current overdrive frame data SOD1(n) as the output frame data SO(n) to the source driver 604.

When the relationship between the previous original frame data F(n-1) and the current original frame data F(n) is not in the preset range, the timing controller 6021 also adjusts the frame data according to the first previous frame data F1(n-1 ) and the first current adjusted frame data F1(n), refer to the table to output the first current overdrive frame data SOD1(n), and input the source driver 604 as the output frame data SO(n). The timing controller 6021 outputs the second current adjusted frame data F2(n) after a fixed period of time, and inputs it into the source driver 604 as the output frame data SO(n). That is, in the frame periods TS1'(n) and TS2'(n), the driving unit 602 respectively uses the first current overdrive frame data SOD1(n) and the second current adjusted frame data F2(n) as output frames The data SO(n) is input to the source driver 604 .

The timing controller 6021 determines whether the previous original frame data F(n−1) and the current original frame data F(n) are within a preset range, for example, according to the minimum data difference. The timing controller 6021 compares the previous original frame data F(n-1) and the current original frame data F(n) to obtain the data difference between the previous original frame data F(n-1) and the current original frame data F(n) . The timing controller 6021 compares the data difference with the minimum data difference. When the data difference is greater than or equal to the minimum data difference, the timing controller 6021 determines that the previous original frame data F(n−1) and the current original frame data F(n) are within the preset range. When the data difference is smaller than the minimum data difference, the timing controller 6021 judges that the previous original frame data F(n−1) and the current original frame data F(n) fall outside the preset range. Wherein, the minimum difference of the data is a preset parameter, which is stored in the timing controller 6021 .

Referring to FIG. 7 , it shows a flow chart of the driving method of the driving unit 602 in FIG. 6A . First, in step 702 , the previous original frame data F(n−1) and the current original frame data F(n) are provided to the buffer 6022 . Next, in step 704, the first previously adjusted frame data F1(n-1) and the second previously adjusted frame data are respectively output according to the previous original frame data F(n-1) and the current original frame data F(n) F2(n−1), the first current adjusted frame data F1(n) and the second current adjusted frame data F2(n). Furthermore, in step 706, it is determined whether the relationship between the previous original frame data F(n−1) and the current original frame data F(n) is within a preset range. Next, in step 708, when the relationship between the previous original frame data F(n-1) and the current original frame data F(n) is within the preset range, according to the first previously adjusted frame data F1(n-1 ) and the first currently adjusted frame data F1(n), and refer to the table to output the first current overdrive frame data SOD1(n) as the output frame data SO(n), input the source driver 604, and in a fixed After a period of time, the first current overdrive frame data SOD1(n) is output again as the output frame data SO(n), which is input to the source driver 604 .

After step 706, step 710 is further included. In step 710, when the relationship between the previous original frame data F(n-1) and the current original frame data F(n) is outside the preset range, according to the first previous adjusted frame data F1(n-1) And the first currently adjusted frame data F1(n), and refer to the table, to output the first current overdrive frame data SOD1(n) as the output frame data SO(n), input the source driver 604, and at a fixed time Afterwards, the second currently adjusted frame data F2(n) is output as the output frame data SO(n), which is input to the source driver 604 .

The driving unit 602 disclosed in this embodiment is used to determine whether the previous and current original frame data F(n-1) and F(n) fall within the predetermined range when the frequency of the output frame data SO(n) is doubled. within the setting range. If yes, the driving unit 602 disclosed in this embodiment outputs the first current overdrive frame data SOD1(n) as the output frame data SO(n) in the frame periods TS1'(n) and TS2'(n). . In this way, even if the frequency of the output frame data SO(n) is increased to twice that of the original frame data F(n), this embodiment can determine the previous and current original frame data F(n-1) and F(n) When it falls within the pre-set range, by making the pixel electrode maintain the overdrive voltage corresponding to the output frame data SO(n) for a longer time, it can also effectively solve the problems in the areas 102 and 104 of FIG. 1B in the conventional method. The reaction time of the liquid crystal molecules in the process is too long, so that the pixel cannot achieve the desired brightness.

In the above first, second and third embodiments, the memories 2023, 4023 and 6023 are, for example, Electrically Erasable Read Only Memory (EEROM). In the first embodiment, the memory 2023 is used to store the first and second tables; in the second and third embodiments, the memories 4023 and 6023 are used to store the tables respectively.

In the above-mentioned embodiment, although the operation of increasing the frequency of the output frame data SO(n) to twice the current original frame data F(n) is used as an example for illustration, the drive unit disclosed in the above-mentioned embodiment 202 , 402 and 602 are not limited to upscaling the output frame data SO(n) to double the frequency. The buffers 2022, 4022 and 6022 in the above embodiment are, for example, Synchronous Dynamic Random Access Memory Buffer (SDRAM Buffer).

In the first embodiment, the first current overdrive frame data and the second current overdrive frame data SOD1(n) and SOD2(n) may be substantially equal or not substantially equal. For example, the first current overdrive frame data SOD1(n) is low driving (Low Driving) overdrive frame data, that is, the grayscale value of the first current overdrive frame data SOD1(n) can also be smaller than the second current overdrive frame data Gray scale value of data SOD2(n).

The drive unit of the present invention is used to provide two overdrive frame data or selectively provide two overdrive frame data in one frame period. Prolonging the time of the overdrive voltage can also effectively solve the problem that the liquid crystal molecules in regions 102 and 104 in FIG. Therefore, the present invention can achieve the advantages of accelerating the response speed of liquid crystal molecules for all grayscale value data when updating the picture with frequency doubling, allowing the picture to quickly and correctly display the desired picture, thereby improving the picture display quality.

To sum up, although the present invention has been disclosed as above using three embodiments, they are not intended to limit the present invention. Those skilled in the art of the present invention should be able to make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the appended claims.

Claims (14)

1. A drive unit applied to a display, the drive unit comprising: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and Sequencer, including: A first overdrive data generation unit, configured to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to a first table to output the first current overdrive frame data to the display ; A second overdrive data generating unit, configured to receive the second previously adjusted frame data and the second current adjusted frame data, and refer to a second table to output the second current overdrive frame data; and The delay unit is configured to receive the second overdrive frame data, delay the second current overdrive frame data for a fixed time, and output the second current overdrive frame data to the display. 2. The driving unit according to claim 1, wherein the frame period of the first current adjusted frame data and the frame period of the second current adjusted frame data are substantially equal to the frame period of the current original frame data In general, the length of the fixed time is substantially equal to the frame period of the first current adjusted frame data. 3. The drive unit according to claim 1, wherein the first previously adjusted frame data is the same as the second previously adjusted frame data, and the first current adjusted frame data and the second The current adjusted frame data is also the same. 4. A display, comprising: display panel; drive unit, including: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and Sequencer, including: The first overdrive data generation unit is used to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to the first table to output the first current overdrive frame data; A second overdrive data generating unit, configured to receive the second previously adjusted frame data and the second current adjusted frame data, and refer to a second table to output the second current overdrive frame data; and a delay unit, configured to receive the second overdrive frame data, delay the second current overdrive frame data for a fixed time, and output the second current overdrive frame data; and A data driver, coupled to the drive unit and the display panel, the data driver is used to receive the first and the second current overdrive frame data, and according to the first and the second current The display panel is driven by overdriving frame data. 5. A drive unit applied to a display, the drive unit comprising: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and The timing controller is used to determine whether the relationship between the previous original frame data and the current original frame data is within a preset range, and if so, according to the first previously adjusted frame data and the first current adjusted For the rear frame data, refer to the table to output the first current overdrive frame data to the display, and after a fixed time, output the first current overdrive frame data to the display again; if not, then according to the The first previously adjusted frame data and the first current adjusted frame data refer to the table to output the first current overdrive frame data to the source driver, and after the fixed time, Outputting the second current adjusted frame data to the display. 6. The drive unit according to claim 5, wherein the timing controller judges whether the previous original frame data and the current original frame data are within the preset range according to the minimum data difference, when the When the data difference between the previous original frame data and the current original frame data is greater than or equal to the minimum data difference, the previous original frame data and the current original frame data are located in the preset range; when When the data difference between the previous original frame data and the current original frame data is smaller than the minimum data difference, the previous original frame data and the current original frame data fall outside the preset range. 7. A display, comprising: display panel; drive unit, including: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and The timing controller is used to determine whether the relationship between the previous original frame data and the current original frame data is within a preset range, and if so, according to the first previously adjusted frame data and the first current adjusted After the frame data, refer to the table to output the first current overdrive frame data, and after a fixed time, output the first current overdrive frame data again; if not, adjust the frame data according to the first previous and the first current adjusted frame data, referring to the table, to output the first current overdrive frame data, and output the second current adjusted frame data after the fixed time; and a data driver, coupled to the driving unit and the display panel, the data driver is used to receive the first current overdriven frame data and the second current adjusted frame data output by the driving unit, and drive the display panel according to the first current overdriven frame data and the second current adjusted frame data. 8. A drive unit applied to a display, the drive unit comprising: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and Sequencer, including: an overdrive data generation unit, configured to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to a table to output the first current overdrive frame data to the display; and The delay unit is used to receive the first current overdrive frame data, and output the first current overdrive frame data to the display after a fixed time. 9. A display, comprising: display panel; drive unit, including: A buffer for storing previous original frame data and current original frame data, and generating first previously adjusted frame data and second previously adjusted frame data according to the previous original frame data, and generating according to the current original frame data the first current adjusted frame data and the second current adjusted frame data; and Sequencer, including: an overdrive data generating unit, configured to receive the first previously adjusted frame data and the first current adjusted frame data, and refer to a table to output the first current overdrive frame data; and a delay unit, configured to receive the first current overdrive frame data, and output the first current overdrive frame data again after a fixed time; and A data driver, coupled to the drive unit and the display panel, the data driver is used to receive the first current overdrive frame data output by the drive unit, and data to drive the display panel. 10. A driving method applied to a display, the display includes a source driver and a driving unit, the driving unit includes a buffer and a timing controller, and the timing controller includes a first overdrive data generating unit, a second Two overdrive data generation unit and delay unit, described drive method comprises: (a) providing previous raw frame data and current raw frame data to said buffer; (b) Outputting the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and outputting the first current adjusted frame data and the second current adjusted frame data according to the current original frame data data; (c) outputting first current overdrive frame data to the source driver according to the first previously adjusted frame data and the first current adjusted frame data, and referring to a first table; (d) outputting second current overdrive frame data according to the second previously adjusted frame data and the second current adjusted frame data, and referring to a second table; and (e) Delaying the second current overdrive frame data for a fixed time before inputting it into the source driver. 11. A driving method applied to a display, the display comprising a source driver and a driving unit, the driving unit comprising a buffer and a timing controller, the driving method comprising: (a) providing previous raw frame data and current raw frame data to said buffer; (b) Outputting the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and outputting the first current adjusted frame data and the second current adjusted frame data according to the current original frame data data; (c) judging whether the relationship between the previous original frame data and the current original frame data is within a preset range; and (d) when the relationship between the previous original frame data and the current original frame data is within the preset range, according to the first previously adjusted frame data and the first current adjusted frame data, And refer to the table to output the first current overdrive frame data to the source driver, and after a fixed time, output the first current overdrive frame data to the source driver again. 12. The driving method according to claim 11, wherein, after step (c), further comprising: (d') When the relationship between the previous original frame data and the current original frame data is outside the preset range, according to the first previous adjusted frame data and the first current adjusted frame data, and refer to the table to output the first current overdrive frame data to the source driver, and after the fixed time, output the second current adjusted frame data to the source driver . 13. The driving method according to claim 11, wherein the timing controller judges whether the previous original frame data and the current original frame data are within the preset range according to the minimum data difference, when the When the data difference between the previous original frame data and the current original frame data is greater than or equal to the minimum data difference, the previous original frame data and the current original frame data fall within the preset range; When the data difference between the previous original frame data and the current original frame data is less than the minimum data difference, the previous original frame data and the current original frame data fall outside the preset range . 14. A driving method applied to a display, the display comprising a source driver and a driving unit, the driving unit comprising a buffer and a timing controller, the driving method comprising: (a) providing previous raw frame data and current raw frame data to said buffer; (b) Outputting the first previously adjusted frame data and the second previously adjusted frame data according to the previous original frame data, and outputting the first current adjusted frame data and the second current adjusted frame data according to the current original frame data data; and (c) According to the first previously adjusted frame data and the first current adjusted frame data, refer to the table to output the first current overdrive frame data to the source driver, and after a fixed time, then Outputting the first current overdrive frame data to the source driver once.

Images