Display method of display panel, driving chip and display device

Abstract

The application discloses a display method, a driving chip and a display device of a display panel. The display method comprises the following steps: in a preset stage when the display panel displays at a first refresh rate, the display brightness level of each frame of display picture in a same dithering processing period is the target brightness level; wherein, the dithering processing period is n frames, and the display brightness level of the n frames of display picture in the dithering processing period is equivalent to the target brightness level; the time length of one frame of the dithering processing period is the same as the time length of one frame when the display panel displays at the first refresh rate; in a stage when the display panel displays at a second refresh rate, the brightness level of each frame of display picture of the display panel is the target brightness level; wherein, the time sequence of the preset stage is before the time sequence of the stage when the display panel displays at the second refresh rate, and the time sequence of the preset stage is connected with the time sequence of the stage when the display panel displays at the second refresh rate; and the first refresh rate is an integer multiple of the second refresh rate. The application can improve the use performance of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to display methods, driver chips, and display devices for display panels. Background Technology

[0002] Organic light-emitting diode (OLED) and flat panel display devices based on light-emitting diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] This invention provides a display method, a driver chip, and a display device for a display panel, thereby improving the performance of the display panel.

[0005] According to one aspect of the present invention, a display method for a display panel is provided, the display method comprising:

[0006] During a preset phase when the display panel is displayed at a first refresh rate, the display brightness level of each frame of the display screen in the same jitter processing cycle is configured to be the target brightness level; wherein, the jitter processing cycle is n frames, where n is an integer greater than 1, and the display brightness level of the n consecutive frames in the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel is displayed at the first refresh rate;

[0007] During the stage where the display panel displays at the second refresh rate, the brightness level of each frame of the display panel is controlled to be the target brightness level; wherein, the timing of the preset stage is prior to the timing of the stage where the display is at the second refresh rate, and the timing of the preset stage is adjacent to the timing of the stage where the display is at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate.

[0008] Optionally, all stages when the display panel displays at the first refresh rate are the preset stages.

[0009] Optionally, a portion of the display panel's display at the first refresh rate is the preset phase.

[0010] Optionally, the display method of the display panel further includes:

[0011] Upon receiving a frequency switching command, the display panel is configured to enter the preset stage.

[0012] Optionally, the duration of the preset stage is proportional to n.

[0013] Optionally, the display method of the display panel further includes:

[0014] In stages other than the preset stage, when the display panel displays at the first refresh rate, the display brightness levels of n consecutive frames in the same jitter processing cycle are configured to be different.

[0015] Preferably, in stages other than the preset stage when the display panel is displayed at the first refresh rate, the sum of the display brightness corresponding to the gray levels in the display brightness levels of n consecutive frames in the same jitter processing cycle is configured to be n times the display brightness corresponding to the same gray level in the target brightness level.

[0016] Preferably, in stages other than the preset stage when the display panel displays at the first refresh rate, the display brightness corresponding to the display brightness level of n consecutive frames in the same jitter processing cycle gradually decreases.

[0017] Optionally, the preset stage includes at least two of the jitter processing cycles.

[0018] Optionally, when the display panel is displayed at a second refresh rate, a frame of the display panel includes a refresh subframe and k hold subframes, where k is an integer greater than or equal to 1, and k+1 is not equal to n.

[0019] According to another aspect of the present invention, a driver chip is provided for performing the display method of the display panel as described above.

[0020] According to another aspect of the present invention, a display device is provided, the display device comprising a display panel and a driver chip as described above, the driver chip being used to drive the display panel.

[0021] The technical solution of this invention employs a display panel display method comprising: in a preset stage when the display panel displays at a first refresh rate, configuring the display brightness level of each frame of the display image within the same jitter processing cycle to be a target brightness level; wherein the jitter processing cycle is n frames, n is an integer greater than 1, and the display brightness level of the n consecutive frames of the display image within the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel displays at the first refresh rate; in a stage when the display panel displays at a second refresh rate, controlling the brightness level of each frame of the display panel to be the target brightness level; wherein the timing of the preset stage precedes the timing of the stage displaying at the second refresh rate, and the timing of the preset stage is contiguous with the timing of the stage displaying at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate. By setting the preset stage, the preset stage is contiguous with the stage displaying at the second refresh rate, meaning that when the preset stage ends, the display panel immediately enters the stage displaying at the second refresh rate. Furthermore, since the display brightness level of all frames in the same jitter processing cycle is configured to the target brightness level during the preset phase, when the display is subsequently displayed at the second refresh rate, the display brightness level of each refreshed subframe at the second refresh rate is also the target brightness level. In other words, the display brightness level of all frames at the second refresh rate is the same, thus preventing flickering and improving the performance of the display panel.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A flowchart illustrating a display panel display method provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a pixel circuit structure provided in an embodiment of the present invention;

[0026] Figure 3 for Figure 2 The corresponding timing diagram;

[0027] Figure 4 This is a schematic diagram of jitter processing in related technologies;

[0028] Figure 5 This is a schematic diagram of a jitter processing method provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of another jitter processing method provided in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a driver chip provided in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] Just as related technologies have issues with the performance of display panels, the inventors, through extensive research, discovered that the root cause of this problem lies in the more specific and detailed requirements of current display panels for various refresh rates. Display panels need to operate at multiple refresh rates, and in certain scenarios, a reduced frame rate is necessary. Furthermore, the scenarios requiring reduced frame rates are increasingly common, such as switching from watching videos to reading ebooks, or from gaming to watching videos. However, in related technologies, display panels exhibit flickering issues when displaying at reduced frame rates, thus requiring further performance improvements.

[0035] To address the aforementioned technical problems, the present invention proposes the following solutions:

[0036] Figure 1 A flowchart illustrating a display panel display method provided in an embodiment of the present invention is shown below. Figure 1 The display methods of the display panel include:

[0037] Step S101: In a preset stage when the display panel is displayed at the first refresh rate, the display brightness level of each frame of the display screen in the same jitter processing cycle is configured to be the target brightness level; wherein, the jitter processing cycle is n frames, n is an integer greater than 1, and the display brightness level of the n consecutive frames of the display screen in the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel is displayed at the first refresh rate;

[0038] Specifically, the display panel is, for example, an LTPO (Low Temperature Polycrystalline Oxide) display panel. This panel includes multiple pixel circuits arranged in an array. The light-emitting elements in these pixel circuits cause the display panel to display the corresponding image. The refresh rate of the display panel refers to the number of frames that the display panel can refresh per second. The first refresh rate is a higher refresh rate, meaning it can refresh the image more times per second. Furthermore, the first refresh rate can also be understood as the display panel's base frequency, meaning that each frame at the first refresh rate consists of only one refresh subframe, excluding hold subframes. Refresh subframes and hold subframes will be described in detail later. During display, for example at any refresh rate, the display panel uses time-dithering. The purpose of dithering is to control the brightness levels of consecutive n frames, and based on the persistence of vision, to make it appear to the human eye that all n frames have the target brightness level. Understandably, the display brightness level defines the brightness corresponding to each grayscale level on the display panel, and the brightness of the same grayscale level differs at different display brightness levels. Each jitter process includes n frames of display images. When the display panel is displaying at the first refresh rate, after entering the preset stage, the display brightness level of the display panel is controlled to be the target brightness level for each frame in all jitter processing cycles. This prevents flickering issues when displaying at a lower frame rate later.

[0039] Step S102: During the stage where the display panel is displayed at the second refresh rate, the display brightness level of each frame of the display panel is controlled to be the target brightness level; wherein, the timing of the preset stage is located before the stage of display at the second refresh rate, and the timing of the preset stage is connected to the timing of the stage of display at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate.

[0040] Specifically, the second refresh rate is a lower refresh rate, suitable for scenarios such as reading e-books or always-on display. When the display panel is displayed at the second refresh rate, each frame includes one refresh subframe and at least one hold subframe. Data is written to the pixel circuits in the refresh subframe, while no data is written in the hold subframe. The duration of each subframe in the next frame at the second refresh rate is the same as the duration of a frame at the first refresh rate. The timing of the pixel circuits in the refresh subframe is the same as that in the first refresh rate, but the timing of the pixel circuits in the hold subframe differs from that in the first refresh rate, as no data is written in the hold subframe. When the number of subframes in the next frame at the second refresh rate differs from the number of frames in the jitter processing cycle, some refreshed subframes may correspond to different frames within the same jitter processing cycle when displayed at the second refresh rate. Since different frames within the same jitter processing cycle correspond to different display brightness levels, the display panel will exhibit inconsistent brightness levels regardless of the refreshed subframes when displayed at the second refresh rate. At a lower second refresh rate, when different frames have different brightness levels, the user will perceive a noticeable flickering phenomenon. In this embodiment, a preset stage is set, which is adjacent to the second refresh rate display stage. That is, after the preset stage ends, the display panel immediately enters the second refresh rate display stage. Furthermore, since the display brightness level of all frames in the same jitter processing cycle is configured to the target brightness level during the preset phase, when the display is subsequently displayed at the second refresh rate, the display brightness level of each refreshed subframe at the second refresh rate is also the target brightness level. In other words, the display brightness level of all frames at the second refresh rate is the same, thus preventing flickering and improving the performance of the display panel.

[0041] The technical solution of this embodiment employs a display panel display method comprising: in a preset stage when the display panel displays at a first refresh rate, configuring the display brightness level of each frame of the display image within the same jitter processing cycle to be a target brightness level; wherein the jitter processing cycle is n frames, n is an integer greater than 1, and the display brightness level of the n consecutive frames of the display image within the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel displays at the first refresh rate; in the stage when the display panel displays at a second refresh rate, controlling the brightness level of each frame of the display panel to be the target brightness level; wherein the timing of the preset stage precedes the timing of the stage displaying at the second refresh rate, and the timing of the preset stage is contiguous with the timing of the stage displaying at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate. By setting the preset stage, the preset stage is contiguous with the stage displaying at the second refresh rate, meaning that when the preset stage ends, the display panel immediately enters the stage displaying at the second refresh rate. Furthermore, since the display brightness level of all frames in the same jitter processing cycle is configured to the target brightness level during the preset phase, when the display is subsequently displayed at the second refresh rate, the display brightness level of each refreshed subframe at the second refresh rate is also the target brightness level. In other words, the display brightness level of all frames at the second refresh rate is the same, thus preventing flickering and improving the performance of the display panel.

[0042] Optionally, in some implementations, the display brightness level can be modified by changing register values. Specifically, the register values ​​are those within the driver chip.

[0043] It should be noted that once the display brightness level of each frame in the jitter processing cycle is configured in the preset stage, if no other instruction to modify the display brightness level is received, the display brightness level of each frame in each jitter processing cycle will be the corresponding target brightness level, regardless of whether the preset stage has ended.

[0044] For illustrative purposes, the pixel circuitry, refresh subframe, hold subframe, and jitter processing cycle will be described in detail below. Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of a pixel circuit structure provided in an embodiment of the present invention. Figure 3 for Figure 2The corresponding timing diagram is shown. The pixel circuit includes a driving transistor T1, a data writing transistor T2, a threshold compensation transistor T3, a first initialization transistor T4, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a second initialization transistor T7, a storage capacitor Cst, and a light-emitting element 11. The first terminal of the data writing transistor T2 is connected to the data voltage Data, and the second terminal of the data writing transistor T2 is electrically connected to the first terminal of the driving transistor T1. The control terminal of the data writing transistor T2 is connected to the first scan signal SP1. The first terminal of the first light-emitting control transistor T5 is connected to the first power supply voltage ELVDD, and the second terminal of the first light-emitting control transistor T5 is electrically connected to the first terminal of the driving transistor T1. The control terminal of the first light-emitting control transistor T5 is connected to the light-emitting control signal EM. The first terminal of the second light-emitting control transistor T6 is electrically connected to the second terminal of the driving transistor T1, and the second terminal of the second light-emitting control transistor T6 is electrically connected to the first terminal of the light-emitting element 11. The control terminal of the second light-emitting control transistor T6 is connected to the light-emitting control signal EM. The first terminal of the second initialization transistor T7 is connected to the second initialization voltage Vrefn. 2. The second terminal of the second initialization transistor T7 is electrically connected to the first terminal of the light-emitting element 11, and the control terminal of the second initialization transistor T7 is connected to the second scan signal SP2; the first terminal of the threshold compensation transistor T3 is electrically connected to the second terminal of the driving transistor T1, and the control terminal of the threshold compensation transistor T3 is connected to the fourth scan signal SN2; the first terminal of the first initialization transistor T4 is connected to the first initialization signal Vrefn1, the second terminal of the first initialization transistor T4 is electrically connected to the first terminal of the threshold compensation transistor T3, and the control terminal of the first initialization transistor T4 is connected to the third scan signal SN1; the first terminal of the storage capacitor Cst is connected to the first power supply voltage ELVDD, and the second terminal of the storage capacitor Cst is electrically connected to the control terminal of the driving transistor T1. The second terminal of the light-emitting element 11 is connected to the second power supply voltage ELVSS. The threshold compensation transistor T3 and the first initialization transistor T4 can be oxide thin-film transistors, which have low leakage current. In low-frequency displays, they can reduce the leakage current at the control terminal of the driving transistor T1, allowing the potential at the control terminal of the driving transistor T1 to be maintained for a longer time, thus being more conducive to low-frequency displays. Other transistors in the pixel circuit can be low-temperature polycrystalline silicon transistors or low-temperature monocrystalline silicon transistors, etc. The light-emitting element 11 is, for example, an OLED (Organic Light Emitting Diode).

[0045] The operation of the pixel circuit includes an initialization phase t1, a data writing phase t2, and an emission phase t3.

[0046] During initialization phase t1, the third scan signal SN1 controls the first initialization transistor T4 to turn on, and the fourth scan signal SN2 controls the threshold compensation transistor T3 to turn on. The first initialization signal Vrefn1 is written to the control terminal of the driving transistor T1, thereby resetting the control terminal of the driving transistor T1 and enabling the driving transistor T1 to turn on during the subsequent data writing phase t2. Also during initialization phase t1, the second scan signal SP2 controls the second initialization transistor T7 to turn on, and the second initialization signal Vrefn2 is written to the first terminal of the light-emitting element 11, resetting the first terminal of the light-emitting element 11 and preventing ghosting caused by residual signals from the previous frame.

[0047] During the data writing phase t2, the first scan signal SP1 controls the data writing transistor T2 to turn on, and the fourth scan signal SN2 controls the threshold compensation transistor T3 to turn on. The data voltage Data is written to the control terminal of the driving transistor T1 through the data writing transistor T2, the driving transistor T1, and the threshold compensation transistor T3. When the potential difference between the control terminal of the driving transistor T1 and the potential of the second terminal of the driving transistor T1 equals the threshold voltage of the driving transistor T1, the driving transistor T1 is turned off, completing the threshold compensation process of the driving transistor T1.

[0048] During the light-emitting phase t3, the light-emitting control signal EM controls the first light-emitting control transistor T5 and the second light-emitting control transistor T6 to turn on. The driving transistor T1 generates a driving current, and the light-emitting element 11 responds to the driving current to emit light.

[0049] The above is the timing diagram for a complete refresh frame of the pixel circuit. When the display panel is displayed at the first refresh rate, each frame is a refresh frame; when the display panel is displayed at the second refresh rate, only the refresh subframe in a frame is the refresh frame described above, while the hold subframe does not have data written.

[0050] It should be noted, of course, that the specific types of pixel circuits are not limited to... Figure 2 The structure shown can also be a transistor circuit comprising two transistors and one capacitor. Furthermore, the driving timing of the pixel circuit is not limited to... Figure 3 The corresponding timing sequence.

[0051] For example, such as Figure 4 As shown, Figure 4 This is a schematic diagram of jitter processing in related technologies. Assume that each jitter processing cycle includes four frames F (the duration of each frame is the same as the duration of the next frame at the first refresh rate). In each jitter processing cycle at the first refresh rate, the display brightness level of the first frame is N1, the display brightness level of the second frame is N2, the display brightness level of the third frame is N3, and the display brightness level of the fourth frame is N4.

[0052] At the second refresh rate, each frame F includes one refresh subframe and two hold subframes, meaning each frame F at the second refresh rate comprises three subframes. The refresh subframe of the first frame corresponds to the first frame of the first jitter processing cycle, with a display brightness level of N1; the refresh subframe of the second frame corresponds to the fourth frame of the first jitter processing cycle, with a display brightness level of N4; the refresh subframe of the third frame corresponds to the third frame of the second jitter processing cycle, with a display brightness level of N3, and so on. N1, N2, N3, and N4 are all different. Therefore, at the second refresh rate, there are multiple consecutive frames with different display brightness levels, resulting in flickering when displayed at the second refresh rate.

[0053] like Figure 5 As shown, Figure 5 This is a schematic diagram of a jitter processing method provided in an embodiment of the present invention. In this embodiment, since the display brightness level of all frames in each jitter processing cycle is the target display brightness level, after switching to the second refresh rate, the display brightness level of the refreshed sub-frames of all frames under the second refresh rate is the target brightness level. Since the display brightness level of all frames under the second refresh rate is the same, there will be no flickering problem.

[0054] Optionally, when the display panel is displayed at the second refresh rate, one frame of the display panel includes a refresh subframe and k hold subframes, where k is an integer greater than or equal to 1, and k+1 is not equal to n. For example, each frame at the second refresh rate includes one refresh subframe and two hold subframes. That is, the value of k is 2, and the first refresh rate is three times the second refresh rate. Of course, in some other embodiments, the value of k can also be other values, such as k equal to 3 or k equal to 4, etc.

[0055] Optionally, the jitter processing period is 4 frames, i.e., n equals 4. In some other implementations, n can also be other values. n is not equal to k+1.

[0056] Optionally, in some implementations, the first refresh rate may be 90Hz and the second refresh rate may be 30Hz. In other implementations, the first refresh rate may be 120Hz and the second refresh rate may be 40Hz.

[0057] Optionally, all stages when the display panel is displayed at the first refresh rate are preset stages.

[0058] Specifically, in this embodiment, the display panel enters the preset stage as soon as it displays at the first refresh rate. Alternatively, before the display panel displays anything, the display brightness level of each frame corresponding to the jitter processing cycle is configured as the target brightness level. Therefore, the display panel will not flicker after switching to any frequency. It is understood that the target brightness level is the desired brightness level when the display panel is displaying, and this target brightness level can be set by the user, such as by dragging a brightness bar. Alternatively, the target brightness level can be automatically set, such as based on the external light intensity. When the external light intensity is strong, the automatically set target brightness level is also higher, so that the user can clearly see the displayed content; when the external light intensity is weak, the automatically set target brightness level is also lower, to avoid harming the user's eyes.

[0059] Alternatively, in some other implementations, a portion of the display at the first refresh rate may be set as the preset phase.

[0060] Specifically, when all stages displayed at the first refresh rate are preset stages, the display brightness level of all frames is the same. If the display time is long, the brightness of the light-emitting element remains unchanged for a long time, which may cause fatigue and affect its service life. This embodiment sets only some stages as preset stages, which can improve the problem of the light-emitting element's brightness remaining unchanged for a long time, thereby improving the problem of service life affected by fatigue.

[0061] Optionally, such as Figure 6 As shown, Figure 6 This is a schematic diagram illustrating another jitter processing method provided in an embodiment of the present invention. The display method of the display panel further includes: configuring different display brightness levels for n consecutive frames of the display screen in the same jitter processing cycle during stages other than the preset stage when the display panel is displaying at a first refresh rate.

[0062] Specifically, in this embodiment, the display panel's display at the first refresh rate includes two stages: an "other stages" and a preset stage. During display, it first enters the "other stages," where the display brightness levels of different frames within the same jitter processing cycle are different. The display brightness levels of n frames within the same jitter processing cycle are equivalent to the target display brightness level; that is, to the human eye, the brightness level of all displayed frames appears to be the target brightness level. Only after entering the preset stage is the display brightness level of all frames within the same jitter processing cycle configured to be the target brightness level, preventing flickering after switching to the second refresh rate. In this embodiment, the display panel's display at the first refresh rate includes a preset stage and other stages. The "other stages" can mitigate fatigue issues of the light-emitting elements during display, and the preset stage is set to avoid flickering after switching to the second refresh rate.

[0063] Optionally, when the display panel is displayed at the first refresh rate, in stages other than the preset stage, the sum of the display brightness corresponding to the gray levels in the display brightness levels of n consecutive frames in the same jitter processing cycle is configured to be n times the display brightness corresponding to the same gray level in the target brightness level.

[0064] Specifically, the display brightness levels of the display panel can be an arithmetic sequence, such as arranged in the order of first display brightness level, second display brightness level, third display brightness level, and so on. However, the display brightness corresponding to adjacent display brightness levels may not be arranged in an arithmetic sequence. For example, when the display brightness level is small, the difference between the display brightness of two adjacent display brightness levels is large; while when the display brightness level is large, the difference between the display brightness of two adjacent display brightness levels is small. Assume n is 4. In the same jitter processing cycle, the display brightness levels corresponding to the 4 frames are N1, N2, N3, and N4, respectively, and the target display brightness level is N5. At the same grayscale, the display brightness corresponding to N1 is m1, the display brightness corresponding to N2 is m2, the display brightness corresponding to N3 is m3, the display brightness corresponding to N4 is m4, and the display brightness corresponding to N5 is m5. Then m1 + m2 + m3 + m4 = 4 * m5. Therefore, the equivalent display brightness of the 4 frames of display in the same jitter processing cycle is the display brightness corresponding to the target display brightness level.

[0065] For example, in some embodiments, when the display panel displays at a first refresh rate, in stages other than a preset stage, the display brightness corresponding to the display brightness level of n consecutive frames in the same jitter processing cycle can be configured to gradually decrease. Furthermore, the display brightness corresponding to the display brightness level of n consecutive frames in the same jitter processing cycle can be further set to gradually decrease by the same difference. Therefore, users are less likely to perceive brightness differences between different frames, resulting in a better display effect.

[0066] Optionally, the display method of the display panel may further include: configuring the display panel to enter a preset stage when a frequency switching command is received.

[0067] Specifically, the frequency switching command can be automatically generated based on the display scenario. For example, when switching from a game scenario to an e-book scenario, from a game scenario to a video viewing scenario, or from a video viewing scenario to an e-book scenario, a frequency switching command is automatically generated. Upon receiving the frequency switching command, it does not immediately enter the stage of displaying at the second refresh rate, but instead continues to display at the first refresh rate for a period of time (i.e., the preset stage), and then enters the stage of displaying at the second refresh rate. This setting can both meet the need to extend the lifespan of the light-emitting elements in the display panel and solve the problem of displaying without flickering after reducing the frame rate.

[0068] Optionally, the duration of the preset phase is proportional to n. The preset phase includes at least two jitter processing cycles. Specifically, the larger n is, the more frames are included in the jitter processing cycle, and the greater the difference between the display brightness level and the target brightness level in each frame of the jitter processing cycle. When switching display brightness levels, it may require multiple consecutive frames to make the actual display brightness level of the display panel the same as the target display brightness level. Therefore, in this embodiment, the larger n is, the longer the duration of the preset phase; and the smaller n is, the shorter the duration of the preset phase. This ensures that during the preset phase, the display brightness level of each frame of the display panel has actually switched to the target brightness level, and subsequently, when displaying at the second refresh rate, it ensures that the actual display brightness level corresponding to each refresh subframe at all second refresh rates is the target brightness level.

[0069] Based on the same inventive concept, this invention also provides a driver chip, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of a driver chip provided in an embodiment of the present invention. The driver chip is used to execute the display method of the display panel provided in any embodiment of the present invention. The driver chip includes a first configuration module 11 and a second configuration module 12. The first configuration module 11 is used to configure the display brightness level of each frame of the display screen in the same jitter processing cycle to be the target brightness level in a preset stage when the display panel is displayed at a first refresh rate; wherein, the jitter processing cycle is n frames, n is an integer greater than 1, and the display brightness level of the n consecutive frames of the display screen in the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel is displayed at the first refresh rate. The second configuration module 12 is used to control the brightness level of each frame of the display panel to be the target brightness level in a stage when the display panel is displayed at a second refresh rate; wherein, the timing of the preset stage is before the timing of the stage when the display panel is displayed at the second refresh rate, and the timing of the preset stage is contiguous with the timing of the stage when the display panel is displayed at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate.

[0070] Specifically, the driver chip is used to drive the display panel. The specific working principle of the driver chip can be found in the description of the display method for the display panel in this invention, and will not be repeated here. In this embodiment, the driver chip sets a preset stage, which is connected to the stage of displaying at the second refresh rate. That is, when the preset stage ends, the display panel immediately enters the stage of displaying at the second refresh rate. Furthermore, since the display brightness level of all frames in the same jitter processing cycle is configured to the target brightness level during the preset stage, when displaying at the second refresh rate subsequently, because the display brightness level of all frames in the same jitter processing cycle is configured to the target brightness level, the display brightness level corresponding to each refresh subframe under the second refresh rate is also the target brightness level. That is, the display brightness level of all frames under the second refresh rate is the same, thus preventing flickering and improving the performance of the display panel.

[0071] Based on the same inventive concept, the present invention also provides a display device, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of a display device provided in an embodiment of the present invention. The display device includes a driver chip and a display panel. The driver chip is used to drive the display panel, and the driver chip includes the driver chip provided in any embodiment of the present invention. The driver chip is bonded to the display panel. The display device can be a mobile phone, tablet computer, MP3 player, MP4 player, video phone, personal digital assistant, advertising machine, smartwatch, smart helmet, or other wearable device, etc. Since the display device provided in the embodiment of the present invention includes the driver chip provided in any embodiment of the present invention, it also has the same beneficial effects, which will not be described again here.

[0072] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0073] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A display method for a display panel, characterized in that, The display method of the display panel includes: During a preset phase when the display panel is displayed at a first refresh rate, the display brightness level of each frame of the display screen in the same jitter processing cycle is configured to be the target brightness level; wherein, the jitter processing cycle is n frames, where n is an integer greater than 1, and the display brightness level of the n consecutive frames in the jitter processing cycle is equivalent to the target brightness level; the duration of one frame in the jitter processing cycle is the same as the duration of one frame when the display panel is displayed at the first refresh rate; During the stage where the display panel displays at the second refresh rate, the brightness level of each frame of the display panel is controlled to be the target brightness level; wherein, the timing of the preset stage is prior to the timing of the stage where the display is at the second refresh rate, and the timing of the preset stage is adjacent to the timing of the stage where the display is at the second refresh rate; the first refresh rate is an integer multiple of the second refresh rate, and the first refresh rate is greater than the second refresh rate.

2. The display method of the display panel according to claim 1, characterized in that, All stages when the display panel displays at the first refresh rate are the preset stages.

3. The display method of the display panel according to claim 1, characterized in that, The preset stage is a portion of the display panel when it displays at the first refresh rate.

4. The display method of the display panel according to claim 3, characterized in that, The display method of the display panel further includes: Upon receiving a frequency switching command, the display panel is configured to enter the preset stage.

5. The display method of the display panel according to claim 3, characterized in that, The duration of the preset stage is proportional to n.

6. The display method of the display panel according to claim 3, characterized in that, The display method of the display panel further includes: In stages other than the preset stage, when the display panel displays at the first refresh rate, the display brightness levels of n consecutive frames in the same jitter processing cycle are configured to be different. Preferably, in stages other than the preset stage when the display panel is displayed at the first refresh rate, the sum of the display brightness corresponding to the gray levels in the display brightness levels of n consecutive frames in the same jitter processing cycle is configured to be n times the display brightness corresponding to the same gray level in the target brightness level. Preferably, in stages other than the preset stage when the display panel displays at the first refresh rate, the display brightness corresponding to the display brightness level of n consecutive frames in the same jitter processing cycle gradually decreases.

7. The display method of the display panel according to claim 1, characterized in that, The preset stage includes at least two jitter processing cycles.

8. The display method of the display panel according to claim 1, characterized in that, When the display panel is displayed at the second refresh rate, a frame of the display panel includes a refresh subframe and k hold subframes, where k is an integer greater than or equal to 1, and k+1 is not equal to n.

9. A driver chip, characterized in that, The driver chip is used to execute the display method of the display panel according to any one of claims 1-8.

10. A display device, characterized in that, The display device includes a display panel and a driver chip as described in claim 9, wherein the driver chip is used to drive the display panel.

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