Driving method for display panel, and display panel and display apparatus

Abstract

A driving method for a display panel, and a display panel (PNL) and a display apparatus. The driving method comprises: scanning gate lines of a display area (AA) in each of M frames, and loading a data voltage by means of a data line (S101); and scanning partial gate lines of the display area (AA) in each of N frames, and loading a data voltage by means of the data line (S102), wherein M+N consecutive frames form one cycle, M and N are positive integers, and the data voltages of two adjacent frames have opposite polarities.

Description

Methods for driving display panels, display panels and display devices Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a driving method for a display panel, a display panel, and a display device. Background Technology

[0002] With the continuous development of terminal technology, electronic devices are being used more and more widely. Devices such as LCD TVs, high-definition digital TVs, computers (desktops and laptops), mobile phones, tablets, navigation systems, in-vehicle displays, projection displays, cameras, digital cameras, electronic watches, calculators, electronic instruments, meters, public display equipment, and virtual reality devices have become indispensable parts of people's daily lives.

[0003] Summary of the Invention

[0004] The driving method, display panel, and display device for the display panel provided in this disclosure are as follows:

[0005] On one hand, embodiments of this disclosure provide a driving method for a display panel, including:

[0006] Within each frame of the M-frame, the grid lines of the display area are scanned, and data voltage is applied through the data lines;

[0007] Within each of the N frames, the local grid lines of the display area are scanned, and data voltage is applied through the data lines;

[0008] A cycle consists of M+N consecutive frames, where M and N are positive integers, and the data voltage polarities of adjacent frames are opposite.

[0009] In some embodiments, the driving method described above in the present disclosure includes scanning the gate lines of the display area in each of the N frames, specifically including: controlling the gate driving circuit to turn on only the gate lines of the display area in each of the N frames via a clock line.

[0010] In some embodiments, the driving method described above in the present disclosure includes scanning the gate lines of a local area of ​​the display area within each of the N frames. Specifically, this includes turning on the gate lines of a local area of ​​the display area and turning off the gate lines of other areas of the display area within each of the N frames by controlling the gate driving circuit through a clock line.

[0011] In some embodiments, the driving method described above in the present disclosure includes scanning the local grid lines of the display area within each of the N frames, specifically including scanning the grid lines of different regions of the display area within different frames of the N frames.

[0012] In some embodiments, the driving method described above in the present disclosure includes scanning the grid lines of a local area of ​​the display area within each of the N frames, specifically including scanning the grid lines of a fixed area of ​​the display area within different frames of the N frames.

[0013] In some embodiments, in the driving method provided in the present disclosure, in one cycle, each of the N frames scans the grid lines of the first fixed region within the display area; in another cycle, each of the N frames scans the grid lines of the second fixed region within the display area.

[0014] In some embodiments, in the driving method provided in the present disclosure, scanning the local grid lines of the display area within each of the N frames specifically includes: scanning the grid lines of the display area from 1 / 24 to 5 / 24 within each of the N frames.

[0015] In some embodiments, the driving method described above in the present disclosure includes scanning the local grid lines of the display area within each of N frames and loading data voltage through data lines. Specifically, this includes scanning the local grid lines of the display area within each of 2n frames and loading data voltage through data lines, where n is a positive integer.

[0016] In some embodiments, in the driving method provided in the present disclosure, scanning the local grid lines of the display area within each of N frames and loading data voltage through data lines specifically includes: scanning the local grid lines of the display area within 1 frame and loading data voltage through data lines.

[0017] In some embodiments, in the driving method provided in the present disclosure, scanning the grid lines of the display area within each frame of M frames and loading data voltage through data lines specifically includes: scanning the grid lines of the display area within 1 frame and loading data voltage through data lines.

[0018] In some embodiments, in the driving method provided in the present disclosure, scanning the grid lines of the display area within each frame of the M frames and loading data voltage through data lines specifically includes: scanning the grid lines of the display area within each frame of the M frames, loading the data voltage corresponding to the display screen locally through data lines, and loading L0 level for other areas of the display area.

[0019] In some embodiments, the driving method provided in this disclosure includes scanning the grid lines of the display area within each frame of the M frames and loading data voltage through data lines. Specifically, this includes scanning the grid lines of the display area within each frame of the M frames and loading data voltage corresponding to the display screen onto the display area through data lines.

[0020] In some embodiments, the driving method provided in this disclosure includes scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data lines, while also maintaining the display image of the previous frame in other areas of the display area within each of the N frames.

[0021] On the other hand, embodiments of this disclosure provide a method for driving a display panel, including:

[0022] Within each frame, only the local grid lines of the display area are scanned, and data voltage is loaded via data lines.

[0023] On the other hand, this disclosure provides a display panel that is driven by the driving method described above.

[0024] In some embodiments, the display panel provided in the present disclosure includes a liquid crystal display panel.

[0025] On the other hand, embodiments of this disclosure provide a display device, including the display panel, system board, and software module described above in embodiments of this disclosure; wherein,

[0026] The software module is configured to provide the system board with a data signal for the image to be displayed, as well as the start and end positions of the image to be displayed in the display area.

[0027] The system board is configured to execute the driving method described above in the embodiments of this disclosure based on the data signal, the start position, and the end position. Attached Figure Description

[0028] Figure 1 is a flowchart of a display panel driving method provided in an embodiment of this disclosure;

[0029] Figure 2 is a schematic diagram of a display device provided in an embodiment of this disclosure;

[0030] Figure 3 is a schematic diagram of another structure of the display device provided in an embodiment of this disclosure;

[0031] Figure 4 is a schematic diagram of a standby scenario provided by an embodiment of this disclosure;

[0032] Figure 5 is a schematic diagram of a social game scenario provided in an embodiment of this disclosure;

[0033] Figure 6a is a schematic diagram of the first frame scan of four consecutive frames in the scenario shown in Figure 5, provided by an embodiment of this disclosure.

[0034] Figure 6b is a schematic diagram of the second frame scan of four consecutive frames in the scenario shown in Figure 5, provided in an embodiment of this disclosure.

[0035] Figure 6c is a schematic diagram of the third frame scan in the scenario shown in Figure 5, which consists of four consecutive frames, provided in an embodiment of this disclosure.

[0036] Figure 6d is a schematic diagram of the fourth frame scan in the scenario shown in Figure 5, provided by an embodiment of this disclosure;

[0037] Figure 7 is a working timing diagram of four consecutive frames in the scenario shown in Figure 4 provided by an embodiment of this disclosure;

[0038] Figure 8a is a timing diagram of the first frame of four consecutive frames in the scenario shown in Figure 5, provided by an embodiment of this disclosure.

[0039] Figure 8b is a timing diagram of the second frame of four consecutive frames in the scenario shown in Figure 5, provided in an embodiment of this disclosure.

[0040] Figure 8c is a timing diagram of the third frame of four consecutive frames in the scenario shown in Figure 5, provided by an embodiment of this disclosure.

[0041] Figure 8d is a timing diagram of the fourth frame of four consecutive frames in the scenario shown in Figure 5, provided in an embodiment of this disclosure.

[0042] Figure 9 is another working timing diagram of four consecutive frames in the scenario shown in Figure 4 provided by an embodiment of this disclosure;

[0043] Figure 10 is a timing diagram of a partial refresh frame provided in an embodiment of this disclosure;

[0044] Figure 11 is another working timing diagram of four consecutive frames in the scenario shown in Figure 4 provided by an embodiment of this disclosure;

[0045] Figure 12 is another schematic diagram of a standby scenario provided by an embodiment of this disclosure;

[0046] Figure 13 is a circuit diagram of a shift register provided in an embodiment of this disclosure;

[0047] Figure 14 is a timing diagram of the shift register shown in Figure 13 in a full-screen refresh frame according to an embodiment of this disclosure;

[0048] Figure 15 is a timing diagram of the shift register shown in Figure 13 operating in a partial refresh frame according to an embodiment of this disclosure. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, for clarity, the thickness of layers, films, panels, regions, etc., is enlarged in the drawings. Exemplary embodiments are described in this disclosure with reference to cross-sectional views as schematic diagrams of idealized embodiments. Thus, deviations from the shape of the figures will be expected as a result of, for example, manufacturing techniques and / or tolerances. Therefore, the embodiments described in this disclosure should not be construed as limited to the specific shape of the regions shown in this disclosure, but rather include deviations in shape caused, for example, by manufacturing processes. For example, a region illustrated or described as flat may typically have rough and / or non-linear characteristics; a sharp corner illustrated may be rounded, etc. Therefore, the regions shown in the figures are schematic in nature, and their dimensions and shapes are not intended to illustrate the precise shape of the regions or reflect true proportions; their purpose is merely to illustrate the content of this disclosure. And throughout, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0050] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure and the claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “inner,” “outer,” “upper,” and “lower” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0051] In the following description, when an element or layer is referred to as "on" or "connected to" another element or layer, the element or layer may be directly on or directly connected to the other element or layer, or there may be intermediate elements or intermediate layers. When an element or layer is referred to as "located on one side of" another element or layer, the element or layer may be directly on or directly connected to the other element or layer, or there may be intermediate elements or intermediate layers. However, when an element or layer is referred to as "directly on" or "directly connected to" another element or layer, no intermediate elements or intermediate layers are present. The term "and / or" includes any and all combinations of one or more of the related listed items.

[0052] With the advent of the AI ​​era, the concept of AI TV has gradually entered people's field of vision. As the control center of the home, the TV needs to control home appliances, lights, and access control, and also display incoming call information and video call functions. The TV needs to maintain a 24-hour online working status. However, power consumption is a major factor restricting the uninterrupted operation of the TV. The current TV consumes an average of about 200W to 300W, and continuous uninterrupted operation will lead to a large amount of power consumption.

[0053] To address the aforementioned technical problems, this disclosure provides a driving method for a display panel. In the driving method provided by this disclosure, M+N consecutive frames constitute one cycle, where M and N are positive integers, and the data voltage polarities of adjacent frames are opposite. Within each cycle, as shown in Figure 1, the driving method may include the following steps:

[0054] S101. Scan the gate lines of the display area within each frame of the M frames and load data voltage through the data lines. Thus, full-screen refresh can be achieved within each frame of the M frames. In some embodiments, as shown in Figures 2 and 3, the display panel PNL includes a display area AA, a first non-display area DP and a second non-display area DPO positioned opposite each other on both sides of the display area AA. The first non-display area DP is used to bond structures such as flexible circuit boards, chip-on-film capacitors (COF), and printed circuit boards (XPCB). Optionally, the display panel PNL can be bonded to the printed circuit board (XPCB) via the COF. In this disclosure, the gate lines can be scanned in reverse from the second non-display area DPO to the first non-display area DP, or in forward from the first non-display area DP to the second non-display area DPO. Optionally, this disclosure can scan the gate lines one by one, or scan each group of two gate lines sequentially.

[0055] S102. Scan the local grid lines of the display area within each of the N frames and load data voltage through the data lines. Thus, local refresh can be achieved within each of the N frames. In some embodiments, such as the standby scenario shown in Figure 4, only the area between the two dashed lines displays the standby screen. This means that local display can be achieved in any area in the middle of the display area. Therefore, refreshing only the area between the dashed lines can be used to display the standby screen while reducing power consumption. Similarly, in the social game scenario shown in Figure 5, if local display can be achieved from the first row to any row of the display area, the game area can be refreshed frame by frame to ensure smooth image quality. The social area is refreshed in M ​​full-screen refresh frames and not refreshed in N local refresh frames to reduce power consumption.

[0056] Figures 6a, 6b, 6c, and 6d illustrate the scanning area in the social game scene shown in Figure 5, with M=1, N=2, and a total of 2160 rows of grid lines. As shown in Figures 6a, 6b, 6c, and 6d, full-screen refreshes are performed in frames 1 and 4, refreshing both the game and social areas; partial refreshes are performed in frames 2 and 3, refreshing only the game area. This achieves a partial refresh display with a high-frequency refresh rate of F Hz and a low-frequency refresh rate of F / 3Hz. If the high-frequency area is 120Hz, the low-frequency area is 40Hz; if the high-frequency area is 144Hz, the low-frequency area is 42Hz. To achieve an even lower low-frequency area, the number of partial refresh frames can be increased, such as one frame for global refresh and four frames for partial refresh, achieving a high-frequency refresh rate of F Hz and a low-frequency refresh rate of F / 5Hz. That is, if the high frequency region is 120Hz, then the low frequency region is 24Hz; if the high frequency region is 144Hz, then the low frequency region is 28.8Hz.

[0057] In some embodiments, the start position of a partial refresh frame for the scenario in Figure 5 can be the first row of grid lines from the DPO side, and the end position is the last grid line corresponding to the game screen in that frame in the display area. Therefore, if the size of the game screen in different partial refresh frames is different in the direction from DPO to DP, the end positions of the different partial refresh frames are different; if the size of the game screen in different partial refresh frames is the same in the direction from DPO to DP, the end positions of the different partial refresh frames are the same. In other words, the game area of ​​this disclosure is determined by the game screen, and can be a region with a fixed start position and an arbitrarily changing end position, or a fixed region with a fixed start position and a fixed end position.

[0058] In some embodiments, in the driving method provided in this disclosure, step S102, scanning the local grid lines of the display area within each of the N frames, can be implemented in the following two ways:

[0059] One implementation involves using a clock line to control the gate drive circuit within each of the N frames, opening the gate lines in a specific area of ​​the display area and closing the gate lines in other areas. For example, in Figures 7, 8b, and 8d, the (n+1)th, (n+3)th, 2nd, and 4th frames undergo partial refreshes. The clock lines CLK1 to CLKm output a high level for a portion of a frame to open the gate lines in that specific area, and output a low level at other times to close the gate lines in other areas. In this case, the duration of these partial refresh frames (the (n+1)th, (n+3)th, 2nd, and 4th frames shown in Figure 7, Figure 8b, and Figure 8d) is the same as the duration of the full-screen refresh frames (the nth, (n+2)th, 1st, and 3rd frames shown in Figure 8a and Figure 8c).

[0060] Another implementation method is to control the gate drive circuit to only turn on the gate lines in the display area within each of the N frames using the clock line. For example, in Figures 9 and 10, the (n+1)th frame, the (n+3)th frame, and the partial scan frame perform local refresh. The clock lines CLK1 to CLKm only output a high level within a frame to turn on the gate lines in the display area, without outputting to the gate lines in other areas, and directly proceed to the next frame. In this case, the duration of the local refresh frames, such as the (n+1)th frame, the (n+3)th frame shown in Figure 9, and the partial scan frame shown in Figure 10, is less than the duration of the full-screen refresh frames, such as the nth frame and the (n+2)th frame shown in Figure 9, significantly reducing the duration of the local refresh frames.

[0061] In some embodiments, as shown in FIG13, the shift register of this disclosure may include 11 transistors T1 to T11 and two capacitors C1 and C2. Transistor T1 is used to charge the PU node, transistor T2 is used to charge the PU_1 node, transistor T3 and capacitor C1 jointly control the OUT_C ​​output terminal to output a cascaded clock signal CLKC, transistor T4 and capacitor C2 jointly control the GOUT output terminal to output a scanning clock signal CLK, transistor T5 is used to reset the PU node, and transistors T6 to T11 are used to reduce noise at the PU node, PU_1 node, OUT_C ​​output terminal, and GOUT output terminal.

[0062] Figure 14 shows the timing diagram of the shift register in Figure 13 during a full-screen refresh frame, and Figure 15 shows the timing diagram of the shift register in Figure 13 during a partial refresh frame. As shown in Figure 14, in a full-screen refresh frame, the cascaded clock signal CLKC and the scan clock signal CLK synchronously output high levels step by step to achieve line-by-line scanning of the gate lines. In the partial refresh frame shown in Figure 15, the cascaded clock signal CLKC outputs high levels step by step, but the scan clock signal CLK only outputs high levels in the local areas that need to be displayed (e.g., rows 3 and 4), achieving scanning of the gate lines in the local areas (e.g., rows 3 and 4). Of course, in some embodiments, the cascaded clock signal CLKC in the partial refresh frame may also only output high levels in the local areas that need to be displayed (e.g., rows 3 and 4). That is, for other display areas that do not need to be refreshed, the cascaded clock signal CLKC and the scan clock signal CLKC may output low levels or not at all.

[0063] In some embodiments, in the standby scenario shown in Figure 4, the entire screen does not need to be displayed; most areas remain black. Therefore, for the black areas, the corresponding shift registers and data lines can be turned off; for the partial display area, the corresponding shift registers are refreshed normally, and the data lines provide the normal data voltage Da, which can significantly reduce power consumption. However, when applied to LCD panels, liquid crystal polarization is a problem that cannot be ignored. Because the liquid crystal in the partial display area of ​​the standby screen is normally polarized, the positive and negative frames are refreshed alternately, which can cancel the polarization. For the non-refresh area, the positive polarity data voltage Da applied to the partial display area by the data line will leak through the transistor to the two non-refresh areas above and below due to the voltage difference, resulting in the residual charge in the pixel always being a single positive polarity. The polarization direction cannot be canceled, and image retention will appear quickly. By shortening the duration of the partial refresh frame, the leakage time can be minimized, thus optimizing the image retention effect. In the social game scenario shown in Figure 5, the partial refresh frame refreshes the game area but not the social area. By shortening the duration of the partial refresh frame, the refresh interval between two adjacent frames in the game area can be minimized, which is beneficial to improving the smoothness of the image quality.

[0064] It should be noted that in the standby scenario shown in Figure 4, only a portion of the display area's grid lines can be scanned within each frame, and a data voltage can be applied via the data line. In other words, each frame can be a partial refresh frame, and the duration of a partial refresh frame is shorter than the duration of a full-screen refresh frame. Figure 11 shows four consecutive frames where only a portion of the display area's grid lines are scanned, and a data voltage Da is applied via the data line. This minimizes the refresh time of each frame, reducing leakage time and optimizing image retention.

[0065] In some embodiments, in the driving method provided in this disclosure, step S102, scanning the local grid lines of the display area within each of the N frames, specifically, scanning the grid lines of different areas of the display area within different frames of the N frames. Taking N as 8 as an example, different frames in the 8 frames can respectively scan the grid lines of the 8 areas shown in Figure 12: 0-270, 271-540, 541-810, 811-1080, 1081-1350, 1351-1620, 1621-1890, and 1891-2160. This allows non-full-screen display images (such as standby images) to be randomly displayed in the 8 areas, achieving dynamic changes in the local refresh area. After multiple cycles (M+N consecutive frames constitute one cycle), all 8 areas can achieve positive and negative frame refresh, thereby ensuring that liquid crystal polarization has recovery time, preventing polarization, and avoiding image retention caused by polarization.

[0066] In some embodiments, within each cycle, the nth frame (e.g., n is an integer greater than or equal to 1 and less than or equal to N) of N consecutive frames scans the same local area of ​​the display area. For example, if N is 8, within each cycle, the first frame of 8 consecutive frames scans rows 0 to 270 of the raster lines shown in Figure 12, the second frame scans rows 271 to 540, the third frame scans rows 541 to 810, the fourth frame scans rows 811 to 1080, the fifth frame scans rows 1081 to 1350, the sixth frame scans rows 1351 to 1620, the seventh frame scans rows 1621 to 1890, and the eighth frame scans rows 1891 to 2160. In other embodiments, within one cycle, the frames of N consecutive frames scan different local areas of the display area in one order; and within another cycle, the frames of N consecutive frames scan different local areas of the display area in another order. For example, within one cycle, the first frame of eight consecutive frames scans rows 0 to 270 of the raster lines shown in Figure 12; the second frame scans rows 271 to 540; the third frame scans rows 541 to 810; the fourth frame scans rows 811 to 1080; the fifth frame scans rows 1081 to 1350; the sixth frame scans rows 1351 to 1620; the seventh frame scans rows 1621 to 1890; and the eighth frame scans rows 1891 to 2160. In another cycle, for eight consecutive frames, the first frame scans rows 1891-2160 of the raster lines shown in Figure 12; the second frame scans rows 1621-1890; the third frame scans rows 1351-1620; the fourth frame scans rows 1081-1350; the fifth frame scans rows 811-1080; the sixth frame scans rows 541-810; the seventh frame scans rows 271-540; and the eighth frame scans rows 0-270. Alternatively... In another cycle, the first frame of eight consecutive frames scans rows 811 to 1080 of the raster lines shown in Figure 12, the second frame scans rows 1891 to 2160 of the raster lines, the third frame scans rows 271 to 540 of the raster lines, the fourth frame scans rows 541 to 810 of the raster lines, the fifth frame scans rows 1621 to 1890 of the raster lines, the sixth frame scans rows 1351 to 1620 of the raster lines, the seventh frame scans rows 1081 to 1350 of the raster lines, and the eighth frame scans rows 0 to 270 of the raster lines, and so on.

[0067] Alternatively, a cycle of M+N consecutive frames can be defined as a period, where M=1 and N=4. The nth frame (e.g., n is an integer greater than or equal to 1 and less than or equal to N) of the N consecutive frames scans the same local area of ​​the display area. For example, a local scan of 4 consecutive frames would scan rows 0 to 270 of the raster lines in Figure 12, while other areas would not be scanned.

[0068] Alternatively, a cycle of M+N consecutive frames can be used, where M=1 and N=4. The nth frame (e.g., n is an integer greater than or equal to 1 and less than or equal to N) of the N consecutive frames scans different local areas of the display area. For example, in a local scan of 4 consecutive frames, the first frame scans rows 0 to 270 of the raster lines shown in Figure 12, the second frame scans rows 271 to 540 of the raster lines, the third frame scans rows 541 to 810 of the raster lines, and the fourth frame scans rows 811 to 1080 of the raster lines.

[0069] Alternatively, M+N consecutive frames constitute a cycle, and the local display of two adjacent cycles corresponds to different local display areas. For example, if M=1 and N=4, in the first cycle, the local display corresponding to the four consecutive display frames is the first area, such as scanning the raster lines 0 to 270 shown in Figure 12. In the second cycle, the local display corresponding to the four consecutive display frames is the second area, such as scanning the raster lines 271 to 540 shown in Figure 12.

[0070] Alternatively, in two adjacent cycle periods, when the local display of each cycle period includes multiple consecutive frames, the local displays contained in two adjacent cycle periods are at least partially different regions. For example, M=1, N=4, in the first cycle period, the local displays corresponding to four consecutive display frames are the first region (e.g., scanning rows 0-270), the second region (e.g., scanning rows 271-540), the third region (e.g., scanning rows 541-810), and the fourth region (e.g., scanning rows 811-1080). In the second cycle period, the local displays corresponding to four consecutive display frames are the second region (e.g., scanning rows 271-540), the first region (e.g., scanning rows 0-270), and the third region (e.g., scanning rows 541-810). The local display for the first four consecutive display frames is: the first region (e.g., scanning rows 0-270), the second region (e.g., scanning rows 271-540), the third region (e.g., scanning rows 541-810), and the fourth region (e.g., scanning rows 811-1080). In the second cycle, the local display for the first four consecutive display frames is: the fifth region (scanning rows 1621-1890), the first region (e.g., scanning rows 0-270), the third region (e.g., scanning rows 541-810), and the fourth region (e.g., scanning rows 811-1080).

[0071] It should be understood that, where image retention can be effectively improved through other solutions provided in the embodiments of this disclosure (e.g., reducing leakage time), the above-described step S102, scanning the local grid lines of the display area within each of the N frames, can also be achieved by scanning the grid lines of a fixed area of ​​the display area (e.g., the area between the double dashed lines shown in FIG4) within different frames of the N frames. Optionally, in each cycle, the grid lines of the same fixed area within the display area are scanned in each of the N local refresh frames. Alternatively, in one cycle, the grid lines of a first fixed area within the display area are scanned in each of the N local refresh frames; in another cycle, the grid lines of a second fixed area within the display area are scanned in each of the N local refresh frames. For example, a cycle consists of 3 consecutive frames, one of which is a full-screen refresh and the other two are partial refreshes. Within 6 consecutive frames (i.e. 2 cycles), the 1st and 4th frames open the 1st to 2160th rows of the raster line in Figure 12 one by one. The 2nd and 3rd frames can open the 1351st to 1620th rows of the raster line one by one. The 5th and 6th frames can open the 811th to 1080th rows of the raster line one by one.

[0072] In some embodiments, the grid lines of the display area from 1 / 24 to 5 / 24 can be scanned separately within each of the N frames. This ensures that non-full-screen images (such as standby images) are not too small to be difficult to see, while also ensuring low power consumption. Theoretical evaluation and actual testing show that when using partial refresh display with a refresh area of ​​1 / 8 of the display area, the overall power consumption can be reduced to approximately 50%.

[0073] In some embodiments, in the driving method provided in this disclosure, step S102, scanning the local grid lines of the display area within each of N frames and loading data voltage through the data line, can specifically be: scanning the local grid lines of the display area within each of 2n frames and loading data voltage through the data line, where n is a positive integer. In some embodiments, as shown in Figure 5 in the social game scenario, the game area is locally refreshed for 2n consecutive frames, and the data polarity of adjacent frames is opposite. Therefore, the polarity of the two M full-screen refresh frames before and after 2n frames is opposite, thereby ensuring that the positive and negative polarities of the social area cancel each other out, and the positive and negative polarities of the game area cancel each other out, resulting in no afterimage.

[0074] In some embodiments, in the driving method provided in this disclosure, step S102, scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data line, can specifically be: scanning the local grid lines of the display area within 1 frame and loading data voltage through the data line, which is equivalent to having a local refresh frame between the two M frames of full-screen refresh. This allows for timely refresh of the upper and lower areas of the standby scene shown in Figure 4 during the full-screen refresh frame, preventing image retention in these areas. Additionally, the social area shown in Figure 5 can be refreshed in a timely manner during the full-screen refresh frame, enabling efficient interaction.

[0075] In some embodiments, in the driving method provided in this disclosure, the grid lines of the display area are scanned within each of the M frames, and data voltage is loaded through the data lines. Specifically, the grid lines of the display area are scanned within one frame, and data voltage is loaded through the data lines. In other words, a full-screen refresh frame can be spaced between two N frames of partial refresh. This allows for periodic refresh of the upper and lower areas of the standby scene shown in Figure 4 that do not display the standby screen during the full-screen refresh frame, improving the afterimage in the upper and lower areas. It also allows for refreshing the social area shown in Figure 5 during the full-screen refresh frame, enhancing the social experience.

[0076] In some embodiments, in the driving method provided in this disclosure, the grid lines of the display area are scanned within each frame of the M frames, and a data voltage is loaded through the data line. Specifically, this can be as follows: the grid lines of the display area are scanned within each frame of the M frames, and a data voltage corresponding to the display screen is loaded locally in the display area through the data line, while an L0 level is loaded for other areas of the display area. In some embodiments, Figures 7 and 9 show the working timing diagrams where M is 1 and N is 1. The nth and n+2th frames of Figures 7 and 9 are refreshed to full screen. A data voltage Da is written to a local area of ​​the display area (e.g., the area between the two dashed lines in Figure 4 where the standby screen is displayed) to display the standby screen. An L0 level is written to the upper and lower areas where the standby screen is not displayed (replacing the scheme of not giving any signal at all), so that the upper and lower areas display a black screen and no longer display the afterimage caused by polarization, achieving a "zeroing" effect, thereby effectively solving the problem of poor afterimage in the upper and lower areas. Optionally, M+N is a scan cycle. Within a scan cycle, the local display and the first global display are the same, for example, both are the standby screen in Figure 4. For example, M=1, N=1. In the local display area (for example, the area between the two dotted lines in Figure 4 where the standby screen is displayed), both the grid lines and data lines of the local display area are given signals, while the grid lines and data lines of the upper and lower areas are not given signals. In the first global display screen, in addition to the grid lines and data lines being given signals at the corresponding positions of the local display area, in the areas outside the local display, such as the upper and lower areas in Figure 4, the grid lines are turned on, and the data signal is given to the grayscale screen of L0, thereby improving the poor afterimage quality in the upper and lower areas.

[0077] In some embodiments, in the driving method provided in this disclosure, the grid lines of the display area are scanned within each frame of the M frames, and data voltage is loaded through data lines. Specifically, it can also be: the grid lines of the display area are scanned within each frame of the M frames, and data voltage corresponding to the display screen is loaded to the display area through data lines. In some embodiments, Figures 8a, 8b, 8c, and 8d show the working timing diagrams of four consecutive frames when M is 1 and N is 1, wherein the first and third frames are full-screen refreshed, and the data voltage Da of the full-screen image is loaded to the entire display area (e.g., the game area and social area shown in Figure 5).

[0078] In some embodiments, the driving method provided in this disclosure, while scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data lines, may also include maintaining the display screen of the previous frame in other areas of the display area within each of the N frames. For example, a full-screen refresh is performed in the first frame of FIG6a, while the second frame of FIG6b and the third frame of FIG6c only refresh the game area, and the social areas of the second and third frames can maintain the display screen of the social area in the first frame.

[0079] To better understand the driving method provided in the embodiments of this disclosure, the two scenarios shown in Figures 4 and 5 will be described in detail below.

[0080] In the standby scenario shown in Figure 4, when only the middle area between the two dashed lines in Figure 4 is refreshed frame by frame, no data signal is loaded in the upper and lower areas (equivalent to a voltage of L0). Because current flows from the high voltage position to the low voltage position, the positive voltage of the middle area is greater than the L0 voltage, so the positive voltage will leak to the upper and lower low voltage areas. The negative voltage of the middle area is less than the L0 voltage, so the negative voltage will not leak to the upper and lower high voltage areas. As a result, the upper and lower areas maintain positive polarity for a long time, and the polarization direction of the liquid crystal cannot be canceled, causing image retention.

[0081] When the driving scheme of one full-screen refresh and one partial refresh shown in Figure 7 is applied to the standby scenario shown in Figure 4, in the nth frame (global scan) of Figure 7, all gate lines are opened by a high level of the clock signal, and a positive voltage is applied to the middle area and an L0 voltage is applied to the upper and lower areas. In the (n+1)th frame (local scan), the gate lines of the middle area are opened by a high level of the clock signal, and a negative voltage is applied to the middle area. The gate lines of the upper and lower areas are closed by a low level of the clock signal, and no data is written. The duration of the (n+1)th frame is the same as that of the nth frame. The (n+2)th frame is the same as the nth frame, and the (n+3)th frame is the same as the 3rd frame. In this way, the positive and negative polarities in the middle area cancel each other out, and there is no afterimage caused by polarization. The upper and lower areas display a black screen because the L0 voltage is written in the nth and (n+2)th frames, and no afterimage is displayed.

[0082] When the driving scheme of one full-screen refresh and one partial refresh shown in Figure 9 is applied to the standby scenario shown in Figure 4, in the nth frame (global scan) of Figure 9, all gate lines are opened by the high level of the clock signal, and a positive voltage is applied to the middle area and an L0 voltage is applied to the upper and lower areas. In the (n+1)th frame (local scan), only the gate lines of the middle area are opened by the high level of the clock signal, and a negative voltage is applied to the middle area. No clock signal is written to the gate lines of the upper and lower areas, and no data is written. The (n+2)th frame is the same as the nth frame, and the (n+3)th frame is the same as the (n+1)th frame. In this way, the positive and negative polarities of the middle area cancel each other out, and there will be no afterimage caused by polarization. The upper and lower areas display a black screen because the L0 voltage is written in the nth and (n+2)th frames, and there is also no afterimage. Furthermore, since the upper and lower areas do not have clock signal written in the (n+1)th and (n+3)th frames, the duration of the (n+1)th and (n+3)th frames is shortened, the leakage time is reduced, and afterimage can be further prevented.

[0083] When the frame-by-frame local refresh driving scheme shown in Figure 11 is applied to the standby scenario shown in Figure 4, in the nth frame (local scan) of Figure 11, only the high level of the clock signal is used to open the gate lines of the middle region, and a positive voltage is applied to the middle region. No clock signal is written to the gate lines of the upper and lower regions, and no data is written. In the (n+1)th frame (local display), only the high level of the clock signal is used to open the gate lines of the middle region, and a negative voltage is applied to the middle region. No clock signal is written to the gate lines of the upper and lower regions, and no data is written. The (n+2)th frame is the same as the nth frame, and the (n+3)th frame is the same as the (n+1)th frame. In this way, the positive and negative polarities of the middle region cancel each other out, preventing image retention caused by polarization. Since no clock signal is written to the upper and lower regions in each frame, the duration of each frame is shortened, leakage time is reduced, and image retention can be effectively prevented.

[0084] In some embodiments, the standby screen can be as shown in Figure 4 or Figure 12, and the specific display is not limited. Optionally, the standby screen of this disclosure can be displayed in a fixed area as shown in Figure 4. Alternatively, it can be randomly displayed in eight areas: 0–270, 271–540, 541–810, 811–1080, 1081–1350, 1351–1620, 1621–1890, and 1891–2160, as shown in Figure 12. This allows for dynamic changes in the local refresh area, ensuring that all eight areas can be refreshed on both positive and negative frames. This guarantees that the liquid crystal polarization has recovery time, prevents polarization, and avoids image retention caused by polarization.

[0085] As shown in Figure 5, in the social game scenario, full-screen refresh frame by frame results in high power consumption. Since the social area has lower requirements for smoothness, this disclosure allows for frame-by-frame refresh of the game area, with at least one frame interval (e.g., 2 or 3 frames) between refreshes of the social area. This achieves high-frequency refresh of the game area to ensure smooth gameplay, and low-frequency refresh of the social area to reduce power consumption.

[0086] In some embodiments, as shown in Figures 6a, 6b, 6c, and 6d, a full-screen refresh is performed in frames 1 and 4, refreshing both the game area and the social area; a partial refresh is performed in frames 2 and 3, refreshing only the game area, while the social area maintains the same image as in frame 1. This allows for a high-frequency refresh rate of F Hz for the game area and a low-frequency refresh rate of F / 3Hz for the social area, reducing power consumption. Furthermore, since the polarities of frames 1 and 4 are opposite, refreshing the social area in frames 1 and 4 cancels out the positive and negative polarities, preventing image retention caused by polarization.

[0087] In some embodiments, as shown in Figures 8a, 8b, 8c, and 8d, a full-screen refresh is performed in the first frame, refreshing both the game area and the social area; a partial refresh is performed in the second frame, refreshing only the game area, while the social area maintains the view from the first frame; a full-screen refresh is performed in the third frame, refreshing both the game area and the social area; and a partial refresh is performed in the fourth frame, refreshing only the game area, while the social area maintains the view from the third frame. This allows for a high-frequency refresh rate of F Hz for the game area and a low-frequency refresh rate of F / 2Hz for the social area, reducing power consumption. Furthermore, because the social area is refreshed only every one frame, efficient interaction is achieved.

[0088] In some embodiments, as shown in Figure 10, the partial refresh frame that refreshes the game area but not the social area can enter the next frame immediately after refreshing the game area, thereby shortening the duration of the partial refresh frame, reducing the waiting time for the next frame of the game screen, and improving the smoothness of the image quality.

[0089] Based on the same inventive concept, this disclosure provides a display panel that is driven by the driving method described above. Since the principle by which this display panel solves the problem is similar to that of the driving method described above, the implementation of this display panel can refer to the embodiments of the driving method described above, and repeated details will not be elaborated further.

[0090] In some embodiments, the display panel provided in this disclosure includes a liquid crystal display panel. The driving method provided in this disclosure can not only reduce the power consumption of the liquid crystal display panel but also improve image retention caused by liquid crystal polarization in the liquid crystal display panel. Optionally, the display panel of this disclosure can also be other types of display panels, such as organic electroluminescent display panels. The driving method provided in this disclosure can reduce the power consumption of other types of display panels.

[0091] Based on the same inventive concept, this disclosure provides a display device, as shown in Figures 2 and 3, including the display panel PNL, system oscillator (SOC), and software module provided in this disclosure embodiment. The software module is configured to provide the SOC with data signals for a display image, as well as the start and end positions of the display image in the display area. The SOC is configured to execute the driving method provided in this disclosure embodiment based on the data signals, start and end positions. Since the principle by which this display device solves the problem is similar to that of the driving method described above, the implementation of this display device can refer to the embodiments of the driving method described above, and repeated details will not be elaborated further.

[0092] In some embodiments, as shown in FIG2, the display device provided in this disclosure may further include a timing control board (TCON) electrically connected between the printed circuit board (XPCB) and the system board (SOC). In some embodiments, the timing control board (TCON) may also be integrated inside the SOC, as shown in FIG3. Optionally, the display device provided in this disclosure may further include components such as sensors, power modules, network modules, radio frequency units, audio output & input units, user input units, and interface units. It is understood that the above structure does not constitute a limitation on the display device provided in the embodiments of this disclosure. In other words, the display device provided in the embodiments of this disclosure may include more or fewer of the above components, or combine certain components, or have different component arrangements.

[0093] Although preferred embodiments of this disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this disclosure.

[0094] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this disclosure without departing from the spirit and scope of the embodiments of this disclosure. Therefore, if these modifications and variations to the embodiments of this disclosure fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include these modifications and variations.

Claims

1. A method for driving a display panel, wherein, include: Within each frame of the M-frame, the grid lines of the display area are scanned, and data voltage is applied via the data lines; Within each of the N frames, the local grid lines of the display area are scanned, and data voltage is applied through the data lines; A cycle consists of M+N consecutive frames, where M and N are positive integers, and the data voltage polarities of two adjacent frames are opposite.

2. The driving method as described in claim 1, wherein, Scanning the local gate lines of the display area within each of the N frames specifically includes: controlling the gate drive circuit via a clock line to only turn on the local gate lines of the display area within each of the N frames.

3. The driving method as described in claim 1, wherein, Scanning the local gate lines of the display area within each of the N frames specifically includes: opening the local gate lines of the display area and closing the gate lines of other areas of the display area within each of the N frames by controlling the gate drive circuit through the clock line.

4. The driving method according to any one of claims 1 to 3, wherein, Scanning the local grid lines of the display area within each of the N frames specifically includes scanning the grid lines of different regions of the display area within different frames of the N frames.

5. The driving method according to any one of claims 1 to 3, wherein, Scanning the grid lines of a local area of ​​the display area within each of the N frames specifically includes scanning the grid lines of a fixed area of ​​the display area within different frames of the N frames.

6. The driving method as described in claim 5, wherein, In one cycle, each of the N frames scans the grid lines of a first fixed region within the display area; in another cycle, each of the N frames scans the grid lines of a second fixed region within the display area.

7. The driving method according to any one of claims 1 to 6, wherein, Scanning the grid lines of the display area in each of the N frames specifically includes scanning the grid lines of the display area from 1 / 24 to 5 / 24 in each of the N frames.

8. The driving method according to any one of claims 1 to 7, wherein, The process of scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data lines specifically includes: scanning the local grid lines of the display area within each of the 2n frames and loading data voltage through the data lines, where n is a positive integer.

9. The driving method according to any one of claims 1 to 8, wherein, The process of scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data lines specifically includes: scanning the local grid lines of the display area within 1 frame and loading data voltage through the data lines.

10. The driving method according to any one of claims 1 to 9, wherein, Within each frame of M frames, the grid lines of the display area are scanned, and data voltage is loaded through the data lines. Specifically, this includes scanning the grid lines of the display area within 1 frame and loading data voltage through the data lines.

11. The driving method according to any one of claims 1 to 10, wherein, Within each frame of the M-frames, the grid lines of the display area are scanned, and data voltage is loaded through the data lines. Specifically, this includes: scanning the grid lines of the display area within each frame of the M-frames, loading the data voltage corresponding to the display image to a local area of ​​the display area through the data lines, and loading L0 level to other areas of the display area.

12. The driving method according to any one of claims 1 to 10, wherein, The process of scanning the grid lines of the display area within each frame of the M-frames and loading data voltage through data lines specifically includes: scanning the grid lines of the display area within each frame of the M-frames and loading the display area with data voltage corresponding to the display screen through data lines.

13. The driving method according to any one of claims 1 to 12, wherein, The process of scanning the local grid lines of the display area within each of the N frames and loading data voltage through the data lines also includes maintaining the display image of the previous frame in other areas of the display area within each of the N frames.

14. A method for driving a display panel, wherein, include: Within each frame, only the local grid lines of the display area are scanned, and data voltage is loaded via data lines.

15. A display panel, wherein, The display panel is driven by the driving method described in any one of claims 1 to 14.

16. The display panel as claimed in claim 15, wherein, The display panel includes a liquid crystal display panel.

17. A display device, wherein, Includes the display panel, system board, and software module as described in claim 15 or 16; wherein, The software module is configured to provide the system board with a data signal for the image to be displayed, as well as the start and end positions of the image to be displayed in the display area. The system board is configured to perform the driving method as described in any one of claims 1 to 14 based on the data signal, the start position, and the end position.

Images