KR102606692B1 - Driving method of display panel and its driving device and display device - Google Patents

Abstract

An embodiment of the present application discloses a method of driving a display panel, a driving device thereof, and a display device, and the method of driving a display panel includes a sub-display period corresponding to the starting position of each sub-frame based on the weight of the data bit. Setting within; Based on the weight of the data bits, the sub-display period in which each data bit in each row of the display panel is located within the display period of one frame is obtained, thereby obtaining the correspondence between time, row number, and each data bit. step; Obtaining a scanning sequence according to the correspondence relationship and providing a scanning signal to the display panel according to the scanning sequence; and performing data reconstruction on the data of each row, providing a data signal to the display panel according to the reconstructed data, and driving the display panel to be displayed.

Description

Driving method of display panel and its driving device and display device

This application relates to the field of displays, for example, to a method of driving a display panel, its driving device, and a display device.

This application claims priority of the Chinese patent application with application number 201910818952.7 filed with the Chinese Intellectual Property Office on August 30, 2019, the entire contents of which are incorporated herein by reference.

Currently, the gray scale implementation of the light emitting system mainly includes two driving methods, such as analog driving and digital driving. Analog driving adjusts the luminance of the light emitting device by adjusting the driving current flowing from the light emitting device, and digital driving adjusts the luminance of the light emitting device. The luminance of the light emitting device is adjusted by adjusting the emission time. Since analog signals are easily mixed with noise, it is difficult to implement high-precision control of the display gray scale of the light emitting device, but the digital driving circuit has low image noise and high conversion speed. Due to its rapid advantages, it is being applied more and more widely.

As the demand for frame rate and display gray scale increases, the existing scan algorithm cannot be applied, and the concept of subfield begins to be applied to various digital driving algorithms. Because there is not enough scanning time, there is not enough data storage and the image is displayed darkly.

The present application provides a method of driving a display panel, a driving device thereof, and a display device, thereby implementing data driving for the display panel and improving the problem of the image being displayed darkly by increasing the scanning time of each data bit, This is advantageous in improving the resolution of the display panel.

This application provides a method of driving a display panel, the method comprising:

Dividing one frame into n sub-frames and dividing the display period of one frame into m sub-display periods - where n is the number of data bits that the display panel must display, and m is n·(2 ⁿ Equal to an integer multiple of -1)-;

Based on the weight of the data bit, setting the starting position of each sub-frame within the corresponding sub-display period;

Based on the weight of the data bit, the sub-display period in which each data bit in each row of the display panel is located within the display period of one frame is obtained, thereby obtaining the correspondence between time, row number, and each data bit. - wherein within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number;

Obtaining a scanning sequence according to the correspondence relationship and providing a scanning signal to the display panel according to the scanning sequence; and

It includes performing data reconstruction on data in each row, providing a data signal to the display panel according to the reconstructed data, and driving the display panel to be displayed.

The present application further provides a driving device for a display panel, the device comprising:

A partition module for dividing one frame into n sub-frames and dividing the display period of one frame into m sub-display periods - where n is the number of data bits that the display panel must display, and m is n·( 2 ⁿ -1) is equal to an integer multiple of -;

a sub-frame allocation module for setting a starting position of each sub-frame within a corresponding sub-display period, based on the weight of the data bit;

A relationship acquisition module for obtaining the correspondence relationship between time, row number, and each data bit by obtaining the sub-display period in which each data bit in each row of the display panel is located, based on the weight of the data bit - where , within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number;

a scan driving module configured to obtain a scan sequence according to the correspondence relationship and provide a scan signal to the display panel according to the scan sequence; and

and a data driving module configured to perform data reconstruction on data in each row, provide a data signal to the display panel according to the reconstructed data, and drive the display panel to be displayed.

The present application further provides a display device, wherein the display device includes a display panel and a driving device of the display panel, wherein the display panel is electrically connected to the driving device, and the driving device includes the scanning signal and the data. A signal is output to the display panel, and the display panel is driven so that the light emitting element of the display panel emits light according to the received scanning signal and the data signal.

The present application provides a method of driving a display panel, in which one frame is divided into n sub-frames, the display period of one frame is divided into m sub-display periods, and n is the number of times the display panel must display. It is the number of data bits, and m is equal to an integer multiple of n·(2 ⁿ -1). Based on the weight of the data bit, the start position of each subframe is set within the corresponding sub-display period, and based on the weight of the data bit, Based on this, by obtaining the sub-display period in which each data bit in each row of the display panel is located within the display period of one frame, the correspondence between time, row number and each data bit is obtained, and the corresponding relationship between the time and row number and each data bit is obtained. Within the display cycle, the same data bits in different rows are shifted step by step according to the row number, obtain a scanning sequence according to the correspondence relationship, provide a scanning signal to the display panel according to the scanning sequence, and Data reconstruction is performed, and a data signal is provided to the display panel according to the reconstructed data to drive the display panel to be displayed, thereby implementing data driving for the display panel and increasing the scanning time of each data bit, Since it improves the problem of images being displayed darkly, it is advantageous in improving the resolution of the display panel.

1 is a structural schematic diagram of a display panel provided in an embodiment of the present application.
Figure 2 is a flowchart of a method of driving a display panel provided in an embodiment of the present application.
Figure 3 is a timing diagram of driving a display panel within one frame provided in an embodiment of the present application.
Figure 4 is a timing diagram of the display panel driving within two frames provided in an embodiment of the present application.
Figure 5 is a schematic diagram of a data reconstruction method provided in an embodiment of the present application.
Figure 6 is a timing diagram of driving a display panel within one frame provided by another embodiment of the present application.
Figure 7 is a timing diagram of driving a display panel within one frame provided by another embodiment of the present application.
Figure 8 is a timing diagram of driving a display panel within one frame provided by another embodiment of the present application.
Figure 9 is a structural schematic diagram of a display panel driving device provided in an embodiment of the present application.

Hereinafter, the present application will be described in further detail by combining the attached drawings and examples. In display panels, as the requirements for frame rate and display gray scale increase, existing scanning algorithms cannot be applied, and the concept of subfield begins to be applied to various digital driving algorithms. Currently used subfield scanning algorithms Because the scan time is insufficient, there is not enough data storage and the image is displayed darkly. The specific analysis is as follows. The scanning time in the currently used subfield scanning algorithm and the number of pixel rows of the display panel are inversely proportional, that is, the more the display rows of the display panel, the shorter the scanning time, and as the resolution of the display panel improves, the number of pixel rows of the display panel increases. As the number of pixel rows gradually increases, scanning time becomes insufficient, causing a problem in which the image is displayed darkly due to insufficient data storage.

An embodiment of the present application provides a method of driving a display panel, and the light emitting device included in the display panel is a micro light emitting diode (Micro Light Emitting Diode, micro-LED/μLED) or an Organic Light Emitting Diode (OLED). ), etc. may be a light emitting device.

1 is a structural schematic diagram of a display panel provided in an embodiment of the present application. As shown in FIG. 1, the display panel includes a timing controller 1, a data processor 2, a row scan circuit 3, and a column scan circuit 4, a plurality of scan lines 5, a plurality of It further includes a data line 6 and a plurality of pixel driving circuits 7, wherein the pixel driving circuit 7 is located in a space formed by the intersection of the scan line 5 and the data line 6, and operates the display panel specifically. The process is as follows:

The data stream to be displayed is input to the data processor 2 and the timing controller 1, a scanning signal is generated according to the set scanning algorithm and provided to the row scanning circuit 3, and the timing required for data processing is determined by the data processor 2. ), and then obtain the data signal through the data processor 2 and transmit it to the column scan circuit 4. The timing controller 1 may be, for example, a Field Programmable Gate Array (FPGA) or other timing controller device. The scan signal passing through the row scan circuit 3 is scan-tft, scan-tft is connected to the gate of the transistor T1 of the pixel driving circuit 7, and similarly, the data passing through the column scan circuit 4 The signal (data-tft) is connected to the source of the transistor (T1) of the pixel driving circuit (7). The operating process of the pixel driving circuit 7 is as follows. Data is first loaded into data-tft, the scan-tft signal changes to a valid signal, the transistor (T1) is turned on, and data-tft is loaded into the gate of the transistor (T2) to charge and discharge the capacitor (CS). When the voltage of the capacitor (CS) reaches the threshold voltage (Vth) of the transistor (T2), the light emitting element (LD) begins to emit light, and after the scanning time has elapsed, the transistor (T1) is turned off, and the capacitor ( The voltage stored in CS) ensures that the light emitting device (LD) continues to emit light until the signal data-tft is input to change the light emitting state of the light emitting device (LD), and the transistor (T1) and transistor (T2) are used for example. For example, they can all be P-type transistors. When the data signal is a digital signal, the number of bits of the data signal corresponds to the gray scale that the light emitting device (LD) can display, and the data signal controls the duration of the light emitting device (LD) to emit light. Control of brightness is implemented, and since the weight of the number of data signal bits corresponds to the light emission duration of the light emitting device (LD), control of the light emission brightness of the light emitting device (LD) is implemented.

Embodiments of the present application provide a method of driving a display panel, and can be executed by a driving device of the display panel provided by the embodiment of the present application, and FIG. 2 shows a method of driving a display panel provided by the embodiment of the present application. This is the flow chart. As shown in FIG. 2, the method of driving the display panel includes the following steps.

S101, one frame is divided into n sub-frames, and the display period of one frame is divided into m sub-display periods; Here, n is the number of data bits that the display panel must display, and m is equal to an integer multiple of n·(2 ⁿ -1).

Figure 3 is a timing diagram of driving a display panel within one frame provided in an embodiment of the present application. As shown in FIG. 3, for example, if one frame (SF) is divided into n sub-frames and the display panel must display 16 gray scales, the number n of data bits that the display panel must display is 4. If equal to , one frame (SF) is divided into four subframes, for example, into a subframe (SF1), a subframe (SF2), a subframe (SF3), and a subframe (SF4).

The display period (TF) of one frame is divided into m sub-display periods (ST), and m is equal to an integer multiple of n·(2 ⁿ -1). For example, when n is 4, m is 60 is an integer multiple of , and FIG. 3 exemplarily sets m to 60, that is, the display period (TF) of one frame (SF) is divided into 60 sub-display periods (ST). As shown in FIG. 7, the sub-display period (ST) satisfies the following calculation formula:

S102, based on the weight of the data bit, the start position of each subframe is set within the corresponding sub-display period.

Based on the weight of the data bits, the start position of each sub-frame is set within the corresponding sub-display period (ST), and for example, when the number n of data bits that the display panel must display is equal to 4, the low data bit The weights from to the highest data bit are sequentially 1, 2, 4, and 8. The display period (TF) of one frame (SF) can be sequentially divided into n time zones, and the number of sub-display cycles included in each of the n time zones is sequentially determined by the weight from the low data bit to the high data bit. That is, the display period (TF) of one frame (SF) is sequentially divided into four time zones, and the number of sub-display cycles included in each of the four time zones is from the low data bit to the high data bit. Corresponds to the weights sequentially, that is, sequentially corresponding to 1, 2, 4, 8, for example, the first time period (t1) contains 4 sub-display periods (ST), the second time period (t2) contains 8 sub-display periods (ST), the third time period (t3) contains 16 sub-display periods (ST), the fourth time period (t4) contains 32 sub-display periods (ST), and , the number of sub-display cycles included in each of the four time zones is set to change in equal proportion according to the weights of 1, 2, 4, and 8 from low to high data bits.

The first sub-display period (ST) of each time slot is used as the starting position of the corresponding sub-frame, that is, the first sub-display period (ST) of the first time slot (t1) is used as the starting position of the sub-frame (SF1), , the first sub-display period (ST) of the second time slot (t2) is used as the start position of the sub-frame (SF2), and the first sub-display period (ST) of the third time slot (t3) is used as the sub-frame (SF3). and the first sub-display period (ST) of the fourth time zone (t4) is used as the start position of the sub-frame (SF4), so 4 obtained by dividing one frame according to the weight of the data bit A corresponding sub-display period (ST) is assigned to each sub-frame so that the number of sub-display periods included in each sub-frame corresponds to the weight of the data bit.

S103, based on the weight of the data bits, obtains a sub-display period in which each data bit in each row of the display panel is located within the display period of one frame, thereby establishing the correspondence between time, row number, and each data bit. acquire; Here, within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number.

Based on the weight of the data bits, a sub-display period (ST) in which each data bit in each row of the display panel is located within the display period of one frame is obtained, so that the numbers 1 to 8 on the left in FIG. 3 are the display panel. Indicates the pixel row number in, and within the display period of one frame, the low data bit (A) of the first row can be set at the start position of the first subframe (SF1), that is, the low data bit (A) of the first row bits are set within the first sub-display period (ST) of the sub-frame (SF1), and according to the weight of each data bit, the remaining data bits of the first row are set in the corresponding sub-display period, i.e., the next lower (Secondary low) Since the weight of the data bit is 2, the sub-display period (ST) in which the next lowest data bit (B) of the first row is located is the sub-display period (ST) in which the low data bit of the first row is located. and are set to be spaced apart by 4 sub-display cycles (ST); Since the weight of the next highest data bit is 4, the sub display period (ST) where the next highest data bit (C) of the first row is located is the sub display period (ST) where the next lowest data bit of the first row is located. It is set to be spaced apart by a display period (ST) and 8 sub-display periods (ST); Since the weight of the high data bit is 8, the sub-display period (ST) where the high data bit (D) of the first row is located is 16 times the sub-display period (ST) where the next highest data bit of the first row is located. It is set to be spaced apart by the sub-display cycle (ST) interval, that is, the number of sub-display cycles spaced between the sub-display cycles (ST) where adjacent data bits are located before and after the first row is equal to the weight of the corresponding data bit. changes proportionally.

For the data bits of the remaining rows, within the display period of one frame, the data bits of the i+1th row are each shifted by the same number of sub-display cycles for the same data bit of the ith row, and i is a positive integer. That is, within one frame display period, the data bits of the following row are each shifted by the same number of sub-display cycles with respect to the same data bits of the previous row. Illustratively, the number of identical sub-display cycles in which the data bits of the back row are shifted relative to the same data bits of the previous row may be greater than n, that is, greater than the number of data bits that the display panel must display, that is, greater than 4, For example, in FIG. 3, the data bits (A) of the back row are shifted back by 8 sub-display cycles (ST) with respect to the data bits (A) of the previous row, and similarly, the data bits (B) of the back row, The data bit (C) and data bit (D) are respectively shifted back by 8 sub-display periods (ST) with respect to the data bit (B), data bit (C), and data bit D of the previous row, and what can be understood is: , the data bits (D) of the 5th row can be understood as being shifted back by 8 sub-display periods (ST) with respect to the data bits (D) of the 4th row, and since the display period of one frame is limited, , the data bit (D) of the fifth row is placed in the position shown in Figure 3, and similarly, the data bit (C) of the seventh row and the data bit (B) of the eighth row are both the same data bits of the previous row. It can be understood that is shifted backward by 8 sub-display cycles (ST). Therefore, based on the weight of the data bit, if the sub-display period in which each data bit in each row of the display panel is located is obtained, the correspondence between time, row number, and each data bit as shown in FIG. 3 is obtained. 3, the horizontal direction represents time, the vertical direction represents row numbers, and ABCD represents four data bits from the low data bit to the high data bit, respectively.

The sub-display period (ST) in which the data bit is set is the scan period, and the sub-display period (ST) in which the data bit following the data bit is not set is the maintenance period, for example, the low data bit (A) The sub-display period (ST) where is located is the scanning period of the low data bit (A), and the four sub-display periods (ST) following the scanning period of the low data bit (A) are the maintenance period of the low data bit (A). The scanning signal is continuously provided within the scanning cycle, the light emitting device adjusts the light emitting state according to the data received within the scanning cycle, and within the maintenance cycle following the scanning cycle, the light emitting device changes the light emitting state within the scanning cycle. To maintain this, the low data bit of the first row is set at the start position of the first subframe, and each remaining data bit of the first row is set to the corresponding sub-display period according to the weight of each data bit, In the case of the data bits of the remaining rows, within the display period of one frame, the data bits of the i+1th row are each shifted by the same number of sub-display cycles for the same data bit of the ith row, and the retention time is each It corresponds to the weight of the data bit, and since the light emitting element maintains the light emitting state within the scanning period within the holding time, the weight of each data bit is implemented using the holding time, and further, the display is performed according to the weight value of each data bit. By controlling the different light emission durations of the light emitting elements of the panel, digital driving of the display panel is implemented.

Figure 4 is a timing diagram of the display panel driving within two frames provided in an embodiment of the present application. As can be seen from Figures 3 and 4, within each frame, the correspondence between time, row number and data bits is the same, and within the display period of one frame, the low data bit (A) of the first row is the first. It is set at the start position of the th sub-frame (SF1), and according to the weight of each data bit, the remaining data bits of the first row are set to the corresponding sub-display period (ST), and the data bits of the i+1-th row are set. The same data bit in the ith row is shifted by the same number of sub-display cycles, so that the row that does not completely reflect all data bits in the previous frame reflects the data bits deleted in the previous frame through the same row in the next frame, and , further implements the weight of all data bits depending on time, that is, depending on the number of sub-display cycles, for example, the data bit (A), data bit (B) and data bit of the fifth row in the previous frame. (C) implements the weight of each data bit in the 5th row by borrowing the data bit (D) of the 5th row in the next frame.

S104, a scanning sequence is obtained according to the correspondence relationship, and a scanning signal is provided to the display panel according to the scanning sequence.

Optionally, the row number in which each data bit appears sequentially according to the time axis in the correspondence relationship can be obtained, the scanning sequence can be obtained according to the order of appearance of the row number, and the scanning sequence corresponding to the row in the display panel can be obtained. Select a scan line to output a scan signal.

Optionally, by combining FIGS. 1 and 3, a scanning sequence is obtained by referring to the correspondence between time, row number, and each data bit shown in FIG. 3, and each data bit is calculated according to the time axis in the correspondence. Obtain row numbers that appear sequentially. For example, referring to the time axis in FIG. 3, if the row numbers in which data bits appear sequentially are 1→8→7→5→1→2..., The scan sequence can be determined as 1 → 8 → 7 → 5 → 1 → 2..., and by combining the settings of each sub-display period (ST) in FIG. 3, the display panel according to the scan sequence The corresponding row is scanned by selecting a scanning line corresponding to the row and outputting a scanning signal, for example, scanning the first row within the first sub-display period (ST), and scanning the first row within the second sub-display period (ST). Scan the 8th row in the third sub-display period (ST), scan the 7th row in the fourth sub-display period (ST), scan the 5th row in the fourth sub-display period (ST), and scan the 5th row in the fifth sub-display period (ST) scans the first row within the sixth sub-display period (ST), does not operate within both the seventh and eighth sub-display periods (ST), and scans the first row within the sixth sub-display period (ST) The second row is scanned within the display period (ST), and for subsequent scans, the corresponding row is scanned by selecting the corresponding scan line according to the above rules and outputting a scan signal.

By scanning using the scanning sequence and transmitting a scanning signal by strobing the corresponding row according to the input order of each data bit, each data bit can be input to a pixel in the corresponding row according to the correspondence relationship. At the same time, it ensures that the scanning process does not create a situation where two data bits must be input simultaneously within the same sub-display period (ST), that is, two rows or two data bits are input within the same sub-display period (ST). Since a situation where more than one row is scanned simultaneously does not occur, inputting the same data to pixels in different rows at the same time is prevented, thereby ensuring that the display panel implements a normal display function.

S105, data reconstruction is performed on the data of each row, and according to the reconstructed data, a data signal is provided to the display panel to drive the display panel to be displayed.

Optionally, first acquire the data of each row, then combine the same data bits in the data of one row according to the arrangement order of the data of one row to form n reconstructed data, and determine the number of bits of each reconstructed data. is equal to the effective column width of the display panel.

Figure 5 is a schematic diagram of a data reconstruction method provided in an embodiment of the present application. Combining Figures 1 to 5, data of each row is obtained, that is, data corresponding to each pixel in each row is acquired, and the obtained data of one row is, for example, 1010, 1101, 0101, 0010, It can be 1100......, that is, data corresponding to the first 5 pixels of one row is provided as an example, the number of bits of each data is 4 bits, and the display panel is 16 gray scale. A display can be implemented. The same data bits in one row of data are combined according to the arrangement order of the data in one row to form n reconstructed data, that is, the data in one row of data are grouped from low data bits to high data bits to form n reconstructed data. Form data. Taking data 1010 as an example, the last bit of the low data bit is 0, the first bit of the high data bit is 1, and if the weights of the data they represent are 1 and 8, respectively, then the low data bit of all data in a row is can be combined into reconstructed data (A), and A is a combination of low data bits among all data in one row arranged according to the arrangement order of pixels in one row, referring to the data in one row as exemplified above. Then, A is 01100... Likewise, the next lowest data bit among all the data in one row is combined into reconstructed data (B), and B is the next lowest data bit among all the data in one row. is arranged and combined according to the arrangement order of the pixels in one row, and referring to the data of one row illustrated above, B is 10010......, and is the next highest data bit among all the data in one row. is combined into reconstructed data (C), where C is a combination of the next highest data bits among all the data in one row arranged according to the arrangement order of the pixels in one row, referring to the data of one row exemplified above. Then, C is 01101..., and the highest data bit among all the data in one row is combined into reconstructed data (D), and D is the highest data bit among all the data in one row in one row. It is arranged and combined according to the arrangement order of the pixels, and referring to the data of one row illustrated above, D is 11001....... As a result, the number of bits of each reconstructed data is equal to the effective column width of the display panel, and the number of rows of pixels included in the display panel is the effective column width of the display panel, that is, the number of data (A) is equal to the number of pixel rows included in the display panel. , data bits are included in data (B), data (C), and data (D).

Optionally, a data signal is provided to the display panel according to the reconstructed data, and n reconstructed data are sequentially output to each data line in one row according to bits within the corresponding sub-display period. Combining Figures 1 to 5, the timing at which the scanning signal and data signal are output can be determined according to the previously obtained scanning sequence, and a row can be selected through the scanning signal output by the scanning line (e.g., Strobing the transistor T1 of the pixel driving circuit of each pixel of the row, for example, pulling down the potential of the scanning line of the row, and pulling up the potential of the scanning line of the remaining row, where the pixel driving circuit (For example, if all of the transistors in Because is stored in the storage capacitor (CS) of the pixel driving circuit, after waiting for one sub-display period (ST), the scanning signal corresponding to the corresponding row is pulled up, the corresponding row is selected again, and new data is written. The voltage is still maintained to ensure turn-on or turn-off of the light-emitting device until the light-emitting state of the light-emitting device is changed.

Taking the n reconstructed data shown above as an example, the column scan circuit may output data signals to data lines D1 to Dm, respectively, according to the n reconstructed data within one frame, using the pixels in the first row as an example. It takes.

Within the first sub-display period (ST), 01100... included in the reconstructed data (A) is input bit by bit to each pixel in the first row, that is, 0 is input to the first data line. , input 1 into the second data line, input 1 into the third data line, input 0 into the fourth data line, input 0 into the fifth data line, and enter the first sub-display cycle (ST). The latter four sub-display periods (ST) are used to implement the weight of the reconstructed data (A) corresponding to the low data bit, the weight value is 1, and the first sub-display period (ST) is the scanning time. , the following four sub-display periods (ST) are retention times.

Within the sixth sub-display period (ST), 10010... included in the reconstructed data (B) is input bit by bit to each pixel in the first row, that is, 1 is input to the first data line. , input 0 into the second data line, input 0 into the third data line, input 1 into the fourth data line, input 0 into the fifth data line, and enter the fifth sub-display cycle (ST). Using the latter eight sub-display cycles (ST), the weight of the reconstructed data (B) corresponding to the next lowest data bit is implemented, the weight value is 2, and the sixth sub-display cycle (ST) is scan time, and the following eight sub-display periods (ST) are maintenance times.

Within the fifteenth sub-display cycle (ST), 01101... contained in the reconstructed data (C) is input bit by bit to each pixel in the first row, that is, 0 is entered in the first data line. Enter, enter 1 in the second data line, enter 1 in the third data line, enter 0 in the fourth data line, enter 1 in the fifth data line, enter the fifteenth sub-display cycle ( Using the 16 sub-display cycles (ST) following ST, the weight of the reconstructed data (C) corresponding to the next highest data bit is implemented, the weight value is 4, and the fifteenth sub-display cycle (ST) ) is the scanning time, and the following 16 sub-display cycles (ST) are the maintenance time.

Within the thirty-second sub-display period (ST), 11001... contained in the reconstructed data (D) is input bit by bit to each pixel of the first row, that is, 1 is entered into the first data line. Enter, enter 1 in the second data line, enter 0 in the third data line, enter 0 in the fourth data line, enter 1 in the fifth data line, enter the thirty-second sub-display cycle ( ST) is used to implement the weight of the reconstructed data (D) corresponding to the high data bit by using the 32 sub-display cycles (ST). The weight value is 8, and the thirty-second sub-display cycle (ST) is This is the scanning time, and the last 32 sub-display cycles (ST) are the maintenance time.

The data of other data bits among each data implements the weight of the corresponding data bit depending on the number of sub-display cycles (ST) included in the retention time, and further adjusts the emission time of the corresponding light-emitting element in the display panel. , adjusts the luminance of the light emitting device.

Referring to the correspondence between time, row number, and data bit shown in FIG. 3, first, the first row is strobed through the scan line, and within the first sub-display period (ST), the reconstructed data (A) is The included 01100...... is input bit by bit to each pixel in the first row, and in the next time period, the 8th row is strobed through the scan line, and within the second sub-display period (ST) In, 10010... included in the reconstructed data (B) is input bit by bit to each pixel in the 8th row, and in the next time slot, the 7th row is strobed through the scan line, Within the third sub-display period (ST), 01101...... included in the reconstructed data (C) is input bit by bit to each pixel in the 7th row, and the scan line is changed in the next time period. Strobing the fifth row through, and within the fourth sub-display period (ST), 11001... included in the reconstructed data (D) bit by bit to each pixel in the fifth row. Input, and by analogy as described above, drive the display panel to be displayed.

An embodiment of the present application implements digital driving for a display panel, and when m is equal to n·(2 ⁿ -1), the scanning duration of each data bit is the sub-display period (ST), and the sub-display period (ST) ) is independent of the number of rows of the display panel, so it increases the scanning time of each data bit, which is advantageous in improving the problem of images being displayed darkly due to insufficient data storage due to insufficient scanning time, thereby improving the resolution of the display panel. This is advantageous in reducing the complexity of the driving chip algorithm because the calculation of the scan time can eliminate the variable in the number of rows. In addition, after data reconstruction is performed on the data of each row, a data signal is provided according to the reconstructed data, allowing immediate reading and immediate use, thereby preventing data reading time from taking up scanning time. It is advantageous to further increase the scanning time of each data bit.

Additionally, the scan timing of the display panel hops on the scanning row order, but for the same data bit, scanning of adjacent identical data bits means that the subsequent scanning row is still 1 greater than the preceding scanning row, and considering row number circulation, Since the first row is the next row after the last row, for the same data bits, the scan timing still changes regularly and is compatible with the multi-stage GOA (Gate On Array) circuit of current display panels. As shown in FIG. 3, since no operation occurs within many sub-display cycles, it is advantageous to reduce power consumption of the display panel by lowering the scanning frequency of the display panel.

Figure 6 is a timing diagram of driving a display panel within one frame provided by another embodiment of the present application. FIG. 3 illustrates the case where the data bit of the i+1 row is greater than n, and FIG. 6 shows the case where the number of the same sub-display period shifted is greater than n with respect to the same data bit of the i-th row, and FIG. 6 shows the number of the same sub-display period shifted The same case as n is shown. As shown in FIG. 6, for example, if the number n of data bits to be displayed by the display panel is 4, similarly, based on the weight of the data bits, each data bit in each row of the display panel is one frame. The sub-display period (ST) located within the display period of can be obtained, and within the display period of one frame, the low data bit (A) of the first row is set to the start position of the first sub-frame (SF1). And, according to the weight of each data bit, each remaining data bit in the first row can be set to the corresponding sub-display period, and in the case of the data bits in the remaining row, within the display period of one frame, i+1 The data bits of a row are each shifted by the same number of sub-display cycles for the same data bit of the ith row, and the number of shifted identical sub-display cycles is equal to n, that is, the same data bits of adjacent rows are shifted by 4 sub-display cycles. Shift by (ST), the scan timing shown in FIG. 6 has the same scan utilization rate as the scan timing shown in FIG. 3, the scan utilization rate is equal to the ratio value of the effective number of scans and the total number of scans, and the effective number of scans is Data bits can be obtained according to the set number of sub-display cycles, and the total number of scans is equal to the total number of sub-display cycles (ST) in one frame.

Optionally, the display period of one frame is divided into m sub-display periods (ST), and the number of pixel rows of the display panel is greater than (a-1)·(2 ⁿ -1) and a·(2 ⁿ -1). If it is less than or equal to all, the display period of one frame is divided into a·n·(2 ⁿ -1) sub-display periods (ST), where a is a positive integer. Combining Figures 3 and 6, the display panel contains 8 rows of pixels, 2 ⁿ -1 is equal to 15, it can be determined that a is equal to 1, that is, the number of rows of the display panel is greater than 0, and 15 If it is less than or equal to, the display period of one frame is divided into a·n·(2 ⁿ -1), that is, divided into 60 sub-display cycles. FIG. 7 is a timing diagram of driving a display panel within one frame provided by another embodiment of the present application. As shown in FIG. 7, the display panel includes 15 rows of pixels, and similarly, a is 1. It can be determined to be equal to, that is, if the number of rows of the display panel is greater than 0 and less than or equal to 15, the display cycle of one frame is divided into aㆍnㆍ(2 ⁿ -1), that is, into 60 sub-display cycles. In the driving timing shown in FIG. 7, the scan utilization rate of the display panel is 100%, that is, all operations occur within each sub-display period.

Figure 8 is a driving timing diagram of the display panel within one frame provided by another embodiment of the present application. As shown in Figure 8, the display panel includes 30 rows of pixels, and similarly, a is 2. It can be determined to be equal to, that is, if the number of rows of the display panel is greater than 15 and less than or equal to 30, the display cycle of one frame is divided into aㆍnㆍ(2 ⁿ -1), that is, into 120 sub-display cycles. In order to implement the weights of different data bits corresponding to 4 subframes, the subframe SF1 includes 8 subdisplay periods (ST), and the subframe SF2 includes 16 subdisplay periods (ST). ST), the sub-frame (SF3) can be set to include 32 sub-display periods (ST), and the sub-frame (SF4) can be set to include 64 sub-display periods (ST).

Likewise, based on the weight of the data bits, a sub-display period (ST) in which each data bit in each row of the display panel is located within the display period of one frame can be obtained, and within the display period of one frame , the low data bit (A) of the first row can be set at the start position of the first subframe (SF1), and the remaining data bits of the first row can be set to the corresponding sub-display period according to the weight of each data bit. , in the case of the data bits of the remaining rows, within the display period of one frame, the data bits of the i+1th row are each shifted by the same number of sub-display cycles for the same data bit of the ith row, and the shifted same sub The number of display cycles can be equal to n, for example, that is, the same data bits in adjacent rows are shifted by four sub-display cycles (ST), thus also implementing digital drive for the display panel, and in the scanning process, the same data bits can be shifted by four sub-display cycles (ST). Within the sub-display period (ST), it is possible to ensure that a situation in which two data bits must be input simultaneously does not occur, that is, scanning two rows or two or more rows simultaneously within the same sub-display period (ST). Since this situation does not occur, inputting the same data to pixels in different rows at the same time is prevented, thereby ensuring that the display panel implements normal display functions.

Optionally, the display period of one frame is divided into a·n·(2 ⁿ -1) sub-display periods, that is, the display period (TF) of one frame (SF) is a·n·(2 ⁿ -1). ) sub-display period (ST), and the sub-display period (ST) satisfies the following calculation formula:

Accordingly, when m is greater than n·(2 ⁿ -1) and an integer multiple of n·(2 ⁿ -1), as the number of pixel rows of the display panel increases, ST decreases, but the amount of decrease in ST varies with the number of pixel rows. It is inversely proportional to a multiple of n·(2 ⁿ -1), and compared to the case where ST of related technology is directly inversely proportional to the number of pixel rows, that is, even if a is directly replaced by the number of pixel rows, the scanning time of each data bit increases. , It is advantageous to improve the resolution of the display panel because it is advantageous to improve the problem of images being displayed darkly due to insufficient data storage due to insufficient scanning time.

Figure 9 is a structural schematic diagram of a display panel driving device provided in an embodiment of the present application. As shown in Figure 9, the display panel driving device includes a partition module 21, a subframe allocation module 22, a relationship acquisition module 23, a scan driving module 24, and a data driving module 25. However, the segmentation module divides one frame into n sub-frames and divides the display period of one frame into m sub-display periods; Here, n is the number of data bits that the display panel must display, and m is equal to an integer multiple of n·(2 ⁿ -1); The sub-frame allocation module sets the starting position of each sub-frame within the corresponding sub-display period, based on the weight of the data bits; The relationship acquisition module obtains the sub-display period in which each data bit in each row of the display panel is located based on the weight of the data bit, thereby obtaining the correspondence relationship between time, row number, and each data bit; Here, within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number; The scan driving module obtains a scan sequence according to the correspondence relationship and provides a scan signal to the display panel according to the scan sequence; The data driving module performs data reconstruction on the data of each row and provides a data signal to the display panel according to the reconstructed data, thereby driving the display panel to be displayed.

The display panel driving device provided in the embodiment of the present application implements data driving for the display panel and increases the scanning time of each data bit, resulting in insufficient data storage due to insufficient scanning time, resulting in image corruption. Since it improves the problem of dark display, it is advantageous for improving the resolution of the display panel. In addition, after data reconstruction is performed on the data of each row, a data signal is provided according to the reconstructed data, allowing immediate reading and immediate use, thereby preventing data reading time from taking up scanning time. It is advantageous to further increase the scanning time of each data bit.

An embodiment of the present application provides a display device, and the display device provided by an embodiment of the present application includes a display panel and a driving device for the display panel according to any of the above embodiments, and the display panel is electrically connected to the driving device. connected, the driving device outputs a driving voltage to the display panel, the display panel drives the light emitting element of the display panel to emit light according to the received driving voltage, and the display device includes the display panel and the display panel according to any of the above embodiments. Since it includes a driving device, the display device provided in the embodiment of the present application also has the advantageous effects described in the above embodiment, so the description will not be repeated here. For example, the display device may be an organic light emitting display device, and the display device may be a mobile phone, a computer, or an electronic device such as a wearable device. The embodiments of the present application are not limited to the specific form of the display device.

The present application provides a method of driving a display panel, a driving device thereof, and a display device, wherein the method of driving a display panel divides one frame into n sub-frames and divides the display period of one frame into m sub-display periods. Step -n is the number of data bits that the display panel must display, and m is an integer multiple of n·(2 ⁿ -1); Based on the weight of the data bit, setting the starting position of each sub-frame within the corresponding sub-display period; Based on the weight of the data bits, the sub-display period in which each data bit in each row of the display panel is located within the display period of one frame is obtained, thereby obtaining the correspondence between time, row number, and each data bit. Step - Within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number -; Obtaining a scanning sequence according to the correspondence relationship and providing a scanning signal to the display panel according to the scanning sequence; And performing data reconstruction on the data of each row, providing a data signal to the display panel according to the reconstructed data, and driving the display panel to be displayed; implementing data driving for the display panel. At the same time, by increasing the scanning time of each data bit, the problem of dark images being displayed is improved, which is advantageous in improving the resolution of the display panel.

Claims (20)

In a method of driving a display panel,
Dividing one frame into n sub-frames and dividing the display period of one frame into m sub-display periods - where n is the number of data bits that the display panel must display, and m is n·(2 ⁿ Equal to an integer multiple of -1)-;
Based on the weight of the data bit, setting the starting position of each sub-frame within the corresponding sub-display period;
Based on the weight of the data bit, the sub-display period in which each data bit in each row of the display panel is located within the display period of one frame is obtained, thereby obtaining the correspondence between time, row number, and each data bit. - wherein within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number;
Obtaining a scanning sequence according to the correspondence relationship and providing a scanning signal to the display panel according to the scanning sequence; and
Performing data reconstruction on the data of each row, providing a data signal to the display panel according to the reconstructed data, and driving the display panel to be displayed,
Here, the step of obtaining a scan sequence according to the correspondence relationship and providing a scan signal to the display panel according to the scan sequence,
Obtaining row numbers in which each data bit appears sequentially according to the time axis in the correspondence relationship, and obtaining the scanning sequence according to the order in which the row numbers appear; and
selecting a scan line corresponding to a row in the display panel according to the scan sequence and outputting the scan signal; Includes,
The steps to perform data reconstruction on the data in each row are:
Obtaining data for each row;
Forming n reconstructed data by combining identical data bits in one row of data according to the arrangement order of the data in one row, where the number of bits of each reconstructed data is equal to the effective column width of the display panel. -; A method of driving a display panel comprising: According to claim 1,
Based on the weight of the data bits, setting the starting position of each sub-frame within the corresponding sub-display period includes:
sequentially dividing the display period of one frame into n time slots, where the number of sub-display cycles included in each of the n time slots sequentially corresponds to weights from low data bits to high data bits; and
A method of driving a display panel comprising: using the first sub-display period of each time zone as the start position of the corresponding sub-frame. According to claim 1,
The step of obtaining a sub-display period in which each data bit in each row of the display panel is located based on the weight of the data bit,
Within the display period of one frame, the low data bit of the first row is set to the starting position of the first sub-frame, and according to the weight of each data bit, the remaining data bits of the first row are set to the corresponding sub-display. Setting up the cycle; and
Within the display period of one frame, shifting the data bits of the i+1-th row by the same number of sub-display cycles with respect to the same data bits of the i-th row, where i is a positive integer; A method of driving a characterized display panel. According to claim 3,
A method of driving a display panel, wherein the number of cycles of the same shifted sub-display is greater than or equal to n. According to claim 1,
The step of providing a data signal to the display panel according to the reconstructed data includes:
A method of driving a display panel comprising sequentially outputting the n reconstructed data to each data line in one row according to bits within the corresponding sub-display period. According to claim 1,
The step of dividing the display period of one frame into m sub-display periods is:
If the number of pixel rows of the display panel is greater than (a-1)·(2 ⁿ -1) and less than or equal to a·(2 ⁿ -1), the display period of one frame is a·n·(2 ⁿ -1) A method of driving a display panel, comprising the step of dividing into sub-display periods, where a is a positive integer. In the driving device of the display panel,
A partition module for dividing one frame into n sub-frames and dividing the display period of one frame into m sub-display periods - where n is the number of data bits that the display panel must display, and m is n. Equal to an integer multiple of (2 ⁿ -1) -;
a sub-frame allocation module for setting a starting position of each sub-frame within a corresponding sub-display period, based on the weight of the data bit;
A relationship acquisition module for obtaining the correspondence relationship between time, row number, and each data bit by obtaining the sub-display period in which each data bit in each row of the display panel is located, based on the weight of the data bit - where , within the display period of one frame, the same data bits in different rows are shifted step by step according to the row number;
a scan driving module configured to obtain a scan sequence according to the correspondence relationship and provide a scan signal to the display panel according to the scan sequence; and
A data driving module configured to perform data reconstruction on the data of each row, provide a data signal to the display panel according to the reconstructed data, and drive the display panel to be displayed,
Here, obtaining a scanning sequence according to the correspondence relationship and providing a scanning signal to the display panel according to the scanning sequence includes:
Obtaining row numbers in which each data bit appears sequentially according to the time axis in the correspondence relationship, and obtaining the scanning sequence according to the order in which the row numbers appear; and
selecting a scan line corresponding to a row in the display panel according to the scan sequence and outputting the scan signal; Includes,
Performing data reconstruction on the data in each row involves:
Obtaining data for each row;
Forming n reconstructed data by combining the same data bits in one row of data according to the arrangement order of the data in one row - where the number of bits of each reconstructed data is equal to the effective column width of the display panel. -; A driving device for a display panel comprising a. A display device comprising a display panel and a driving device for the display panel according to claim 7,
The display panel is electrically connected to the driving device, the driving device outputs the scan signal and the data signal to the display panel, and the display panel is configured to output the scan signal and the data signal to the display panel according to the received scan signal and the data signal. A display device characterized in that the light emitting element is driven to emit light. delete delete delete delete delete delete delete delete delete delete delete delete