Display panel driving method, driving device and display panel

Abstract

The present invention discloses a driving method, a driving device, and a display panel for a display panel. The driving method includes: obtaining luminous data of the display panel within a display frame; wherein a display frame includes multiple subframes, and the luminous data includes first luminous times corresponding to the multiple subframes; determining the luminous brightness corresponding to the multiple subframes in the luminous data; determining second luminous times corresponding to the multiple subframes based on the difference between the obtained luminous brightness and a reference brightness; and controlling the display panel to emit light based on the second luminous time. The technical solution provided by an embodiment of the present invention determines the second luminous time based on the difference between the luminous brightness corresponding to each subframe at the first luminous time and the reference brightness, so as to achieve the purpose of adjusting the first luminous time, and controls the display panel to emit light based on the second luminous time to reduce the brightness difference between each subframe at the second luminous time, thereby improving the flicker problem of the display panel under low-frequency display and improving display quality.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a driving method and a driving device of a display panel, and a display panel. Background Art

[0002] With the development of display technology, users' requirements for display quality are getting higher and higher.

[0003] Organic light emitting diode (OLED) display panels emit light by current driving, so the characteristics of the driving device will affect the display grayscale brightness, thereby reducing the display quality. Summary of the Invention

[0004] The present invention provides a display panel driving method, a driving device and a display panel, so as to improve the brightness difference of the display panel during the display process, thereby improving the display quality.

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

[0006] Acquire light emitting data of the display panel in a display frame; wherein the display frame includes a plurality of subframes, and the light emitting data includes first light emitting times corresponding to the plurality of subframes;

[0007] Determining the luminous brightness corresponding to each of the plurality of subframes in the luminous data;

[0008] Determining second luminous times corresponding to the plurality of subframes according to the obtained differences between the luminous brightness of the plurality of subframes and the reference brightness;

[0009] The display panel is controlled to emit light according to the second light-emitting time.

[0010] Optionally, the multiple subframes include stable brightness subframes and non-stable brightness subframes; and the step of determining the second light-emitting times corresponding to the multiple subframes according to the obtained differences between the light-emitting brightness of the multiple subframes and the reference brightness includes:

[0011] Taking the luminance corresponding to one of the stable brightness subframes as the reference brightness, and determining the second luminance time corresponding to the unstable brightness subframe based on the brightness difference between the luminances of the multiple subframes and the reference brightness;

[0012] or,

[0013] The average luminance corresponding to the plurality of stable brightness subframes is used as the reference brightness, and the second luminance time corresponding to the unstable brightness subframe is determined based on the brightness difference between the luminance of the plurality of subframes and the reference brightness.

[0014] Optionally, the second light-emitting time corresponding to the stable brightness subframe is equal to the first light-emitting time.

[0015] Optionally, the multiple subframes include stable brightness subframes and non-stable brightness subframes; and the step of determining the second light-emitting times corresponding to the multiple subframes according to the obtained differences between the light-emitting brightness of the multiple subframes and the reference brightness includes:

[0016] The luminance corresponding to any one of the unstable luminance subframes is used as the reference luminance, and the second luminance times corresponding to the subframes are determined based on the luminance differences between the luminances of the subframes and the reference luminance.

[0017] Optionally, the second luminous time and the reference brightness satisfy the following relationship:

[0018] TN=T0-LN / T0*(LN-Lave);

[0019] Among them, TN is the second light-emitting time corresponding to the Nth subframe, T0 is the first light-emitting time, LN is the light-emitting brightness corresponding to the Nth subframe, and Lave is the reference brightness.

[0020] Optionally, the luminous brightness of the multiple subframes is negatively correlated with the second luminous time.

[0021] Optionally, the step of determining the luminous brightness corresponding to each of the plurality of subframes in the luminous data includes:

[0022] For each of the subframes, the luminous brightness corresponding to each of the subframes is determined by integration.

[0023] According to another aspect of the present invention, there is provided a driving device for a display panel, comprising:

[0024] a light emitting data acquisition module, configured to acquire light emitting data within at least one display frame of the display panel; wherein one display frame includes a plurality of subframes, and the light emitting data includes first light emitting times corresponding to the plurality of subframes;

[0025] a luminous brightness determination module, configured to determine the luminous brightness corresponding to each of the plurality of subframes in the luminous data;

[0026] a luminous time adjustment module, configured to determine a second luminous time corresponding to the plurality of subframes according to a difference between the obtained luminous brightness of the plurality of subframes and a reference brightness;

[0027] A driving module is configured to control the display panel to emit light according to the second light-emitting time.

[0028] Optionally, the luminous time adjustment module is specifically used to:

[0029] Taking the luminance corresponding to one of the stable brightness subframes as the reference brightness, and determining a second luminance time corresponding to the unstable brightness subframe based on a brightness difference between the luminances of the multiple subframes and the reference brightness;

[0030] Alternatively, an average luminance corresponding to a plurality of the stable luminance subframes is used as the reference luminance, and a second luminance time corresponding to the unstable luminance subframe is determined based on a luminance difference between the luminance of the plurality of subframes and the reference luminance;

[0031] Alternatively, the luminous brightness corresponding to any one of the unstable brightness subframes is used as the reference brightness, and the second luminous times corresponding to the plurality of subframes are determined based on the brightness difference between the luminous brightness of the plurality of subframes and the reference brightness.

[0032] According to another aspect of the present invention, a display panel is provided, comprising a pixel circuit and a driving device for the display panel provided by any embodiment of the present invention.

[0033] The technical solution provided by an embodiment of the present invention obtains luminous data for multiple subframes within a display frame, wherein the luminous data includes a first luminous time corresponding to the multiple subframes. The luminous brightness corresponding to each of the multiple subframes is then determined based on the obtained luminous data. The second luminous time corresponding to the multiple subframes is then determined based on the difference between the luminous brightness of the multiple subframes and a reference brightness, and the display panel is controlled to emit light based on the second luminous time. Due to the characteristic differences of the driving transistors within the display panel, the luminous brightness of each subframe at the first luminous time varies. Compared to the prior art, the technical solution provided by an embodiment of the present invention determines the second luminous time based on the difference between the luminous brightness corresponding to each subframe at the first luminous time and the reference brightness, thereby achieving the purpose of adjusting the first luminous time. The display panel is then controlled to emit light based on the second luminous time to reduce the brightness difference between each subframe at the second luminous time, thereby improving the flicker problem of the display panel under low-frequency display and further improving display quality.

[0034] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A method for driving a display panel provided by an embodiment of the present invention;

[0037] Figure 2 A schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0038] Figure 3 A pixel circuit driving timing waveform diagram provided by an embodiment of the present invention;

[0039] Figure 4 A driving timing waveform diagram of another pixel circuit provided by an embodiment of the present invention;

[0040] Figure 5 A flowchart of another display panel driving method provided by an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of luminous brightness under a first luminous time provided by an embodiment of the present invention;

[0042] Figure 7 A flowchart of another display panel driving method provided by an embodiment of the present invention;

[0043] Figure 8 for Figure 6 A partially enlarged schematic diagram of the luminous brightness curve shown;

[0044] Figure 9 A flowchart of another display panel driving method provided by an embodiment of the present invention;

[0045] Figure 10 A flowchart of another display panel driving method provided by an embodiment of the present invention;

[0046] Figure 11 A schematic structural diagram of a driving device for a display panel provided in an embodiment of the present invention;

[0047] Figure 12 A schematic structural diagram of a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] As described in the background art, existing display panels have the problem of poor image quality during the display process. The inventors have discovered that the reason for the above problem is that when the existing display panel is displaying, a display cycle includes a write frame and a hold frame. For example, when the refresh rate is 60Hz, all 60 data frames are write frames, and data is written in each write frame. When the refresh rate is 1Hz, based on the 60Hz, one data frame is used as a write frame and the other data frames are used as hold frames. Data is only written in the write frame, and no data is written in the hold frame. Because data needs to pass through the driver transistor when writing in the pixel circuit, the action of the driver transistor in the data frame and the hold frame is different, resulting in different characteristics of the driver transistor. When the light emission time of each data frame is the same, the characteristic bias of the driver transistor plays a dominant role, resulting in brightness differences between different data frames. Especially in low-frequency display, a periodic flickering phenomenon will occur, thereby reducing the display quality.

[0051] In view of the above problem, an embodiment of the present invention provides a method for driving a display panel. Figure 1 The embodiment of the present invention provides a method for driving a display panel, which can be executed by a driving device, which can be a driving chip. Figure 1 , a display panel driving method provided by an embodiment of the present invention includes:

[0052] S110 , obtaining light emitting data of a display panel within a display frame; wherein a display frame includes a plurality of sub-frames, and the light emitting data includes first light emitting times corresponding to the plurality of sub-frames.

[0053] Figure 2 A schematic structural diagram of a pixel circuit provided by an embodiment of the present invention is shown. Figure 3 A pixel circuit driving timing waveform diagram provided by an embodiment of the present invention, combined with Figure 2 and Figure 3In this embodiment, the display panel includes a pixel circuit that drives a light-emitting diode D1 to emit light, thereby displaying an image. The second transistor Q2 and the third transistor Q3 are configured to be turned on during the initialization phase in response to a first scan signal S1 and a fourth scan signal S4, respectively, to reset the gate of the first transistor Q1 and the anode of the light-emitting diode D1, respectively. The first transistor Q1 is a driving transistor. The fourth transistor Q4 is configured to be turned on during the data writing phase in response to the second scan signal S2 to transmit the data voltage on the data line Data to the gate of the first transistor Q1. The fifth transistor Q5 is configured to be turned on in response to the third scan signal S3 to compensate for the threshold voltage of the first transistor Q1. The sixth transistor Q6 and the seventh transistor Q7 are configured to be turned on during the emission phase in response to an emission control signal EM, causing the first transistor Q1 to generate a drive current, thereby driving the light-emitting diode D1 to emit light.

[0054] The light-emission control signal EM is typically a high-level or low-level signal. By controlling the duty cycle of the light-emission control signal EM, the light-emission duration of each subframe can be adjusted. For example, a low-level signal of the light-emission control signal EM is an active signal. When the light-emission control signal EM is low, the display panel emits light; when the light-emission control signal EM is high, the display panel does not emit light. By controlling the duration of the low-level state of the light-emission control signal EM, the light-emission duration of the display panel can be controlled.

[0055] refer to Figure 3 In this embodiment, the acquired luminescence data includes the first luminescence times corresponding to multiple subframes. Specifically, within a display frame, the first subframe is a write frame, and the first luminescence time corresponding to the write frame is t1. Except for the first subframe, the other subframes are hold frames, and the first luminescence times corresponding to each hold frame are t2...tn, respectively, where n is a positive integer greater than or equal to 2. Here, the first luminescence time corresponding to each subframe is the same, that is, t1 = t2 = ...tn.

[0056] Of course, in other embodiments, the first light-emitting time corresponding to each subframe may also be different.

[0057] S120: Determine the luminous brightness corresponding to the plurality of subframes in the luminous data.

[0058] Specifically, after obtaining the luminous data corresponding to each subframe, the luminous brightness corresponding to each of the multiple subframes is determined based on the luminous data. When the first luminous time corresponding to each subframe is the same, the luminance deviation caused by the threshold voltage drift caused by the bias of the first transistor Q1 plays a dominant role.

[0059] S130 , determining second luminous times corresponding to the plurality of subframes according to differences between the obtained luminous brightness of the plurality of subframes and a reference brightness.

[0060] Specifically, due to the different characteristics of the first transistor Q1 in the pixel circuit, the luminance corresponding to each subframe varies. The second luminance duration corresponding to each subframe is determined based on the difference between the luminance of each subframe and the reference luminance. In other words, for subframes whose luminance deviates from the reference luminance, the luminance corresponding to that subframe is adjusted by adjusting the luminance duration of that subframe. The luminance duration is determined by the luminance control signal EM, and the luminance duration can be adjusted by adjusting the duty cycle of the luminance control signal EM.

[0061] Figure 4 Another driving timing waveform diagram of a pixel circuit provided by an embodiment of the present invention is shown in FIG. Figure 4 , the luminous brightness of multiple subframes is negatively correlated with the second luminous time. For example, if the luminous brightness corresponding to the first subframe is greater than the reference brightness, the luminous time of the first subframe can be reduced according to the difference between the two to reduce the luminous brightness of the first subframe. If the luminous brightness corresponding to the first subframe is less than the reference brightness, the luminous time of the first subframe can be increased according to the difference between the two to improve the luminous brightness of the first subframe. Similarly, the second luminous time corresponding to each subframe can be determined in sequence to reduce the brightness difference between different subframes. Figure 4 As shown, the second luminous time t11 corresponding to the first subframe is not equal to the second luminous time t21 corresponding to the second subframe, and the corresponding second luminous time tm can be adjusted according to the actual luminous brightness of the mth subframe. Wherein, m is a positive integer greater than or equal to 2.

[0062] It should be noted that the luminance of the multiple subframes here is obtained based on the first luminance time. Therefore, the second luminance time obtained based on the difference between the luminance of the multiple subframes and the reference luminance is obtained based on the first luminance time. In other words, the second luminance time is obtained by adjusting the first luminance time.

[0063] In this embodiment, the reference brightness may be a range value.

[0064] S140 , controlling the display panel to emit light according to the second light-emitting time.

[0065] The display panel driving method provided by an embodiment of the present invention obtains luminous data for multiple subframes within a display frame, wherein the luminous data includes first luminous times corresponding to the multiple subframes. The luminous brightness corresponding to each of the multiple subframes is then determined based on the obtained luminous data. The second luminous times corresponding to the multiple subframes are then determined based on the difference between the luminous brightness of the multiple subframes and a reference brightness, and the display panel is controlled to emit light based on the second luminous times. Due to differences in the characteristics of the driving transistors within the display panel, the luminous brightness of each subframe at the first luminous time varies. Compared to the prior art, the technical solution provided by the embodiment of the present invention determines the second luminous time based on the difference between the luminous brightness corresponding to each subframe at the first luminous time and the reference brightness, thereby achieving the purpose of adjusting the first luminous time. The display panel is then controlled to emit light based on the second luminous time to reduce the brightness difference between each subframe at the second luminous time, thereby improving the flicker problem of the display panel under low-frequency display and further improving display quality.

[0066] Figure 5 A flowchart of another display panel driving method provided by an embodiment of the present invention is provided. Figure 5 Based on the above embodiment, the step of determining the luminous brightness corresponding to the plurality of subframes in the luminous data specifically includes:

[0067] S1201 : For each subframe, determine the luminous brightness corresponding to each subframe by integration.

[0068] Specifically, the luminous brightness is equal to the product of the luminous intensity and the luminous time. In one frame, the longer the luminous time is, the greater the corresponding luminous brightness is. Figure 6 A schematic diagram of the luminous brightness under a first luminous time provided by an embodiment of the present invention, with reference to Figure 6 Taking a refresh rate of 1Hz as an example, each frame lasts 1s. A frame consists of 60 subframes, the first of which is a write frame, and the remaining 59 subframes are hold frames. Each subframe lasts 1 / 60s. Therefore, the luminous duration of each subframe is less than 1 / 60s. For each subframe, the corresponding luminous brightness can be obtained by integrating the subframe's first luminous duration.

[0069] Figure 7 A flowchart of another display panel driving method provided by an embodiment of the present invention is provided. Figure 7 Based on the above technical solutions, the driving method of the display panel provided by the embodiment of the present invention includes:

[0070] S110 , obtaining light emitting data of a display panel within a display frame; wherein a display frame includes a plurality of sub-frames, and the light emitting data includes first light emitting times corresponding to the plurality of sub-frames.

[0071] S120: Determine the luminous brightness corresponding to the plurality of subframes in the luminous data.

[0072] S1301: Taking the luminance corresponding to a stable brightness subframe as a reference brightness, and determining a second luminance time corresponding to a non-stable brightness subframe based on the brightness difference between the luminances of multiple subframes and the reference brightness.

[0073] Specifically, since the driving transistor is biased for a long time, the threshold characteristic drifts, so when switching to a new display frame, the luminous brightness will jump instantly (such as Figure 6 Therefore, the plurality of subframes include stable brightness subframes and unstable brightness subframes.

[0074] Figure 8 for Figure 6 The local enlarged schematic diagram of the luminous brightness curve shown is shown in Figure 2. Figure 8 , areas A, B, C, and D all correspond to unstable brightness subframes, where area A can correspond to the first subframe, area B can correspond to the second subframe, area C can correspond to the third subframe, and area D can correspond to the fourth subframe. Areas E, F, and G all correspond to stable brightness subframes. In other words, within a display frame, the first four subframes experience brightness jumps, while the subsequent subframes have relatively stable luminance. Therefore, the first luminous time of the first four subframes needs to be adjusted to reduce the brightness difference between them and the remaining subframes.

[0075] Here, the luminance corresponding to a stable brightness subframe can be used as the reference brightness. For example, the brightness of region E is used as the reference brightness, and the luminance LE of region E is determined by integration as the reference brightness. Similarly, the luminances of regions A, B, C, and D are determined by integration, where the luminance of region A is LA, the luminance of region B is LB, the luminance of region C is LC, and the luminance of region D is LD.

[0076] Based on the brightness difference between the luminance of each subframe and the reference brightness, the luminance time of each subframe is adjusted, and the adjusted luminance time is the second luminance time. In this embodiment, the second luminance time and the reference brightness satisfy the following relationship:

[0077] TN=T0-LN / T0*(LN-Lave);

[0078] Wherein, TN is the second luminous time corresponding to the Nth subframe, T0 is the first luminous time, LN is the luminous brightness corresponding to the Nth subframe, and Lave is the reference brightness.

[0079] According to the above formula, the second luminous time TA corresponding to the first subframe is T0-LA / T0*(LA-LE), the luminous time TB corresponding to the second subframe is T0-LB / T0*(LB-LE), the second luminous time TC corresponding to the third subframe is T0-LC / T0*(LC-LE), and the second luminous time TD corresponding to the fourth subframe is T0-LD / T0*(LD-LE). Figure 4 In the emission control signal EM corresponding to each subframe, the duration of the active level of the emission control signal EM is t11 = TA, t21 = TB, and so on. The greater the difference between the emission brightness corresponding to the unstable brightness subframe and the reference brightness, the shorter the second emission time of the unstable brightness subframe. By setting the second emission time, the brightness difference caused by the shift in the threshold characteristics of the driving transistor is corrected, and the brightness difference between the unstable brightness subframe and the stable brightness subframe can be reduced, which helps to improve flicker on the display panel and thus enhance display quality.

[0080] Furthermore, in this embodiment, since the light emitting brightness of each stable brightness subframe is relatively stable, the second light emitting time corresponding to each stable brightness subframe may be equal to the first light emitting time.

[0081] S140 , controlling the display panel to emit light according to the second light-emitting time.

[0082] Of course, there are other ways to determine the reference brightness, which will be described one by one through the following embodiments.

[0083] Figure 9 A flowchart of another display panel driving method provided by an embodiment of the present invention is provided. Figure 9 On the basis of the above technical solutions, optionally, a method for driving a display panel provided by an embodiment of the present invention includes:

[0084] S110 , obtaining light emitting data of a display panel within a display frame; wherein a display frame includes a plurality of sub-frames, and the light emitting data includes first light emitting times corresponding to the plurality of sub-frames.

[0085] S120: Determine the luminous brightness corresponding to the plurality of subframes in the luminous data.

[0086] S1302: Taking the average luminance corresponding to the plurality of stable brightness subframes as a reference brightness, determine a second luminance time corresponding to the unstable brightness subframe based on the brightness difference between the luminance of the plurality of subframes and the reference brightness.

[0087] Specifically, relative to Figure 7The technical solution shown uses the luminance corresponding to a stable brightness subframe as the reference brightness, and uses the average luminance of multiple stable brightness subframes as the reference brightness to further reduce the brightness difference between unstable brightness subframes and stable brightness subframes. For example, the average brightness of regions E, F, and G can be used as the reference brightness, and the luminances LE, LF, and LG of regions E, F, and G can be determined respectively by integration. Then, the reference brightness Lave = (LE + LF + LG) / 3. Therefore, based on the reference brightness, the second luminous time TA corresponding to the first subframe after adjustment is TA = T0 - LA / T0 * (LA - Lave), the luminous time TB corresponding to the second subframe is TB = T0 - LB / T0 * (LB - Lave), the second luminous time TC corresponding to the third subframe is TC = T0 - LC / T0 * (LC - Lave), and the second luminous time TD corresponding to the fourth subframe is TD = T0 - LD / T0 * (LD - Lave).

[0088] S140 , controlling the display panel to emit light according to the second light-emitting time.

[0089] The above technical solutions are described using the example of a non-stable brightness subframe with a higher luminance than a stable brightness subframe. However, in actual operation of a display panel, the luminance of a non-stable brightness subframe may be lower than that of a stable brightness subframe. In this case, the above technical solutions still apply and are not further described here.

[0090] Figure 10 A flowchart of another display panel driving method provided by an embodiment of the present invention is provided. Figure 10 On the basis of the above technical solutions, optionally, a method for driving a display panel provided by an embodiment of the present invention includes:

[0091] S110 , obtaining light emitting data of a display panel within a display frame; wherein a display frame includes a plurality of sub-frames, and the light emitting data includes first light emitting times corresponding to the plurality of sub-frames.

[0092] S120: Determine the luminous brightness corresponding to the plurality of subframes in the luminous data.

[0093] S1303: Taking the luminous brightness corresponding to any one subframe in the unstable brightness subframe as a reference brightness, and determining second luminous times corresponding to the plurality of subframes based on the brightness difference between the luminous brightness of the plurality of subframes and the reference brightness.

[0094] Specifically, since the brightness jump generated by the unstable brightness subframe is caused by the drift of the threshold characteristic of the driving transistor, the brightness difference between the luminous brightness of the unstable brightness subframe and the luminous brightness of the stable brightness subframe will not be too large. Figure 8As shown. Therefore, the luminous brightness corresponding to any subframe in the unstable brightness subframe can also be used as the reference brightness, and the luminous brightness of the remaining subframes in the unstable brightness subframe and the luminous brightness of the stable brightness subframe can be adjusted to be consistent with the reference brightness, thereby achieving consistency in the luminous brightness of each subframe. For example, taking the luminous brightness of area A as LA as the reference brightness, the second luminous time TB corresponding to the subframe in area B is T0-LB / T0*(LB-LA), where LB is less than LA, so TB is greater than T0. In other words, by increasing the second luminous time of the subframe in area B, the luminous brightness of the subframe in area B is kept consistent with the luminous brightness of the subframe in area A, thereby reducing the brightness difference. The second luminous time corresponding to each subsequent subframe still satisfies the above formula and will not be repeated here.

[0095] S140 , controlling the display panel to emit light according to the second light-emitting time.

[0096] In this embodiment, the second luminous time is set according to the difference between the actual luminous brightness of each subframe and the reference brightness to correct the brightness difference caused by the offset of the threshold characteristics of the driving transistor. This can reduce the brightness difference between the unstable brightness subframe and the stable brightness subframe, which is beneficial to improving the flickering phenomenon of the display panel at a low refresh rate, thereby improving the display quality.

[0097] Optionally, an embodiment of the present invention further provides a driving device for a display panel, which is used to execute the driving method provided in any of the above embodiments. The driving device may be a driving chip. Figure 11 A schematic diagram of a driving device for a display panel according to an embodiment of the present invention is provided. Figure 11 , the driving device comprises:

[0098] The luminescence data acquisition module 11 is configured to acquire luminescence data within at least one display frame of the display panel; wherein one display frame includes a plurality of sub-frames, and the luminescence data includes first luminescence times corresponding to the plurality of sub-frames.

[0099] The luminous brightness determination module 12 is used to determine the luminous brightness corresponding to multiple subframes in the luminous data.

[0100] The luminous time adjustment module 13 is configured to determine the second luminous time corresponding to the plurality of subframes according to the obtained differences between the luminous brightness of the plurality of subframes and the reference brightness.

[0101] The driving module 14 is configured to control the display panel to emit light according to the second light-emitting time.

[0102] The luminous time adjustment module is specifically configured to: use the luminous brightness corresponding to a stable brightness subframe as the reference brightness, and determine the second luminous time corresponding to the unstable brightness subframe based on the brightness difference between the luminous brightness of multiple subframes and the reference brightness.

[0103] or,

[0104] The average luminance corresponding to the plurality of stable luminance subframes is used as a reference luminance, and the second luminance time corresponding to the unstable luminance subframe is determined based on the luminance difference between the luminance of the plurality of subframes and the reference luminance.

[0105] Alternatively, the luminous brightness corresponding to any one subframe in the unstable brightness subframe is used as the reference brightness, and the second luminous time corresponding to the plurality of subframes is determined based on the brightness difference between the luminous brightness of the plurality of subframes and the reference brightness.

[0106] The technical solution provided by an embodiment of the present invention obtains luminous data for multiple subframes within a display frame, wherein the luminous data includes first luminous times corresponding to the multiple subframes. The luminous brightness corresponding to each of the multiple subframes is then determined based on the obtained luminous data. The second luminous times corresponding to the multiple subframes are then determined based on the difference between the luminous brightness and a reference brightness, and the display panel is controlled to emit light based on the second luminous times. Due to differences in the characteristics of the driving transistors within the display panel, the luminous brightness of each subframe at the first luminous time varies. Compared to the prior art, the technical solution provided by an embodiment of the present invention determines the second luminous time based on the difference between the luminous brightness corresponding to each subframe at the first luminous time and the reference brightness, thereby achieving the purpose of adjusting the first luminous time. The display panel is then controlled to emit light based on the second luminous time to reduce the brightness difference between each subframe at the second luminous time, thereby improving the flicker problem of the display panel under low-frequency display and further improving display quality.

[0107] Optionally, an embodiment of the present invention further provides a display panel, comprising a pixel circuit and a display panel driving device provided by any embodiment of the present invention, so that the display panel also has the beneficial effects described in any of the above embodiments. The pixel circuit is not limited to the pixel circuit provided by the above embodiment, and the pixel circuit may also have other structures. Figure 12 A schematic diagram of the structure of a display panel provided in an embodiment of the present invention. In this embodiment, the display panel can be applied to Figure 12 The mobile phone shown can also be applied to any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc., and the embodiments of the present invention do not specifically limit this.

[0108] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0109] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for driving a display panel, characterized in that: include: Acquire light emitting data of the display panel in a display frame; wherein the display frame includes a plurality of subframes, and the light emitting data includes first light emitting times corresponding to the plurality of subframes; Determining the luminous brightness corresponding to each of the plurality of subframes in the luminous data; Determining second luminous times corresponding to the plurality of subframes according to the obtained differences between the luminous brightness of the plurality of subframes and the reference brightness; controlling the display panel to emit light according to the second light-emitting time; The plurality of subframes include stable brightness subframes and non-stable brightness subframes; The step of determining the second luminous time corresponding to the plurality of subframes according to the obtained differences between the luminous brightness of the plurality of subframes and the reference brightness comprises: Taking the luminance corresponding to one of the stable brightness subframes as the reference brightness, and determining the second luminance time corresponding to the unstable brightness subframe based on the brightness difference between the luminances of the multiple subframes and the reference brightness; or, The average luminance corresponding to the plurality of stable luminance subframes is used as the reference luminance, and the second luminance time corresponding to the unstable luminance subframe is determined based on the luminance difference between the luminance of the plurality of subframes and the reference luminance.

2. The method for driving a display panel according to claim 1, wherein: The second light-emitting time of the stable brightness subframe is equal to the first light-emitting time.

3. The method for driving a display panel according to claim 1, wherein: The step of determining the second luminous time corresponding to the plurality of subframes according to the obtained differences between the luminous brightness of the plurality of subframes and the reference brightness comprises: The luminance corresponding to any one of the unstable luminance subframes is used as the reference luminance, and the second luminance times corresponding to the subframes are determined based on the luminance differences between the luminances of the subframes and the reference luminance.

4. The method for driving a display panel according to any one of claims 1 to 3, wherein: The second luminous time and the reference brightness satisfy the following relationship: TN=T0-LN / T0*(LN-Lave); Among them, TN is the second light-emitting time corresponding to the Nth subframe, T0 is the first light-emitting time, LN is the light-emitting brightness corresponding to the Nth subframe, and Lave is the reference brightness.

5. The method for driving a display panel according to claim 1, wherein: The light emission luminance of the plurality of subframes is negatively correlated with the second light emission time.

6. The method for driving a display panel according to claim 1, wherein: The step of determining the luminous brightness corresponding to each of the plurality of subframes in the luminous data comprises: For each of the subframes, the luminous brightness corresponding to each of the subframes is determined by integration.

7. A driving device for a display panel, characterized in that: include: a light emitting data acquisition module, configured to acquire light emitting data within at least one display frame of the display panel; wherein one display frame includes a plurality of subframes, and the light emitting data includes first light emitting times corresponding to the plurality of subframes; a luminous brightness determination module, configured to determine the luminous brightness corresponding to each of the plurality of subframes in the luminous data; a luminous time adjustment module, configured to determine a second luminous time corresponding to the plurality of subframes according to a difference between the obtained luminous brightness of the plurality of subframes and a reference brightness; a driving module, configured to control the display panel to emit light according to the second light-emitting time; The multiple subframes include stable brightness subframes and unstable brightness subframes, and the luminous time adjustment module is specifically configured to: Taking the luminance corresponding to one of the stable brightness subframes as the reference brightness, and determining a second luminance time corresponding to the unstable brightness subframe based on a brightness difference between the luminances of the multiple subframes and the reference brightness; or, The average luminance corresponding to the plurality of stable brightness subframes is used as the reference brightness, and the second luminance time corresponding to the unstable brightness subframe is determined based on the brightness difference between the luminance of the plurality of subframes and the reference brightness.

8. The display panel driving device according to claim 7, wherein: The luminous time adjustment module is used for: The luminance corresponding to any one of the unstable luminance subframes is used as the reference luminance, and the second luminance times corresponding to the subframes are determined based on the luminance differences between the luminances of the subframes and the reference luminance.

9. A display panel, characterized in that: The device comprises a pixel circuit and a driving device for a display panel as claimed in any one of claims 7 to 8.

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