CN115775532A - Display panel driving method, driving device and display panel - Google Patents

Abstract

The invention discloses a display panel driving method, a driving device and a display panel. The driving method includes: acquiring luminescence data of the display panel in a display frame; wherein, a display frame includes a plurality of subframes, and the luminescence data includes a plurality of subframes. The first light-emitting time corresponding to the frame; determine the light-emitting brightness corresponding to the multiple sub-frames in the light-emitting data; determine the second light-emitting time corresponding to the multiple sub-frames according to the difference between the obtained light-emitting brightness and the reference brightness; control according to the second light-emitting time The display panel glows. The technical solution provided by the embodiment of the present invention determines the second light-emitting time based on the difference between the corresponding light-emitting brightness of each sub-frame at the first light-emitting time and the reference brightness, so as to achieve the purpose of adjusting the first light-emitting time, and according to the first light-emitting time The second light-emitting time controls the display panel to emit light, so as to reduce the brightness difference of each sub-frame under the second light-emitting time, so as to improve the flicker problem of the display panel under low-frequency display and improve display quality.

Description

Display panel driving method, driving device and display panel

technical field

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

Background technique

With the development of display technology, users have higher and higher requirements for display quality.

The organic light-emitting diode display panel is driven by current to emit light, so the characteristics of the driving device will affect the brightness of the gray scale displayed, thereby reducing the display quality.

Contents of the invention

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

According to an aspect of the present invention, a method for driving a display panel is provided, including:

Acquiring luminescence data of the display panel in a display frame; wherein, a display frame includes a plurality of subframes, and the luminescence data includes a first luminescence time corresponding to the plurality of subframes;

determining the luminous luminance corresponding to the plurality of subframes in the luminous data;

determining the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness;

The display panel is controlled to emit light according to the second light emitting time.

Optionally, the plurality of subframes include stable brightness subframes and non-stable brightness subframes; determining the corresponding brightness of the plurality of subframes according to the obtained difference between the luminous brightness of the plurality of subframes and the reference brightness The steps of the second luminescent time include:

Taking the light emission brightness corresponding to one subframe with stable brightness as the reference brightness, and determining the second light emission corresponding to the subframe with unstable brightness based on the brightness difference between the light emission brightness of the plurality of subframes and the reference brightness time;

or,

Taking the average luminous luminance corresponding to the plurality of stable luminance subframes as the reference luminance, and determining the first luminance corresponding to the non-stable luminance subframe based on the brightness difference between the luminous luminance of the multiple subframes and the reference brightness. 2. Luminous time.

Optionally, the second light-emitting time corresponding to the stable brightness sub-frame is equal to the first light-emitting time.

Optionally, the plurality of subframes include stable brightness subframes and non-stable brightness subframes; determining the corresponding brightness of the plurality of subframes according to the obtained difference between the luminous brightness of the plurality of subframes and the reference brightness The steps of the second luminescent time include:

Taking the luminous luminance corresponding to any subframe in the subframes with non-stable luminance as the reference luminance, and determining the corresponding luminance of multiple subframes based on the luminance difference between the luminous luminance of the multiple subframes and the reference luminance the second glow time.

Optionally, the second lighting time and the reference brightness satisfy the following relationship:

TN=T0-LN/T0*(LN-Lave);

Wherein, TN is the second lighting time corresponding to the Nth subframe, T0 is the first lighting time, LN is the lighting brightness corresponding to the Nth subframe, and Lave is the reference brightness.

Optionally, the light-emitting luminances of the plurality of sub-frames are negatively correlated with the second light-emitting time.

Optionally, the step of determining the luminous brightness respectively corresponding to the plurality of subframes in the luminous data includes:

For each of the subframes, the luminous brightness corresponding to each of the subframes is determined in an integral manner.

According to another aspect of the present invention, a display panel driving device is provided, including:

A luminescence data acquisition module, configured to acquire luminescence data in at least one display frame of the display panel; wherein, one display frame includes a plurality of subframes, and the luminescence data includes a first luminescence time corresponding to the plurality of subframes;

A luminous brightness determination module, configured to determine the luminous brightness corresponding to the plurality of subframes in the luminous data;

A light-emitting time adjustment module, configured to determine the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness;

A driving module, configured to control the display panel to emit light according to the second lighting time.

Optionally, the luminescence time adjustment module is specifically used for:

Taking the luminous brightness corresponding to one subframe with stable luminance as the reference luminance, and determining the first luminance corresponding to the non-stable luminance subframe based on the brightness difference between the luminous brightness of the multiple subframes and the reference brightness Two luminous time;

Or, taking the average luminous luminance corresponding to the plurality of stable luminance subframes as the reference luminance, and determining the corresponding luminance of the non-stable luminance subframe based on the luminance difference between the luminous luminance of the plurality of subframes and the reference luminance. the second luminescence time;

Or, taking the luminous luminance corresponding to any subframe in the subframes with unstable luminance as the reference luminance, and determining a plurality of the subframes based on the luminance difference between the luminous luminance of the multiple subframes and the reference luminance. The second light emission time corresponding to the frame.

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

In the technical solution provided by the embodiment of the present invention, by acquiring the luminescence data of multiple subframes in a display frame, wherein the luminescence data includes the first luminescence time corresponding to the multiple subframes, and then according to the obtained luminescence data, determine the respective corresponding and then determine the second light-emitting time corresponding to the plurality of sub-frames according to the difference between the light-emitting brightness of the multiple sub-frames and the reference brightness, and control the display panel to emit light according to the second light-emitting time. Due to the difference in the characteristics of the driving transistors in the display panel, the luminance of each sub-frame at the first luminous time is different. Compared with the prior art, the technical solution provided by the embodiment of the present invention is based on the fact that each sub-frame is at the first luminous time. The difference between the corresponding luminous brightness and the reference luminance determines the second luminous time to achieve the purpose of adjusting the first luminous time, and controls the display panel to emit light according to the second luminous time to reduce the brightness of each subframe under the second luminous time. The brightness difference can be improved, thereby improving the flickering problem of the display panel under low-frequency display, thereby improving the display quality.

It should be understood that the content described in this section is not intended to identify 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 be easily understood from the following description.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a driving method of a display panel provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

Fig. 3 is a driving timing waveform diagram of a pixel circuit provided by an embodiment of the present invention;

FIG. 4 is a driving timing waveform diagram of another pixel circuit provided by an embodiment of the present invention;

FIG. 5 is a flow chart of another method for driving a display panel provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of luminous brightness at a first luminous time provided by an embodiment of the present invention;

FIG. 7 is a flow chart of another method for driving a display panel provided by an embodiment of the present invention;

FIG. 8 is a partially enlarged schematic diagram of the luminous brightness curve shown in FIG. 6;

FIG. 9 is a flow chart of another method for driving a display panel provided by an embodiment of the present invention;

FIG. 10 is a flow chart of another method for driving a display panel provided by an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a driving device for a display panel provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a display panel provided by an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

As mentioned in the background art, the existing display panel has the problem of poor image display quality during the display process. The inventors have found through research that the reason for the above problems 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 frequency is 60Hz, all 60 data frames are write frames. Data is written in each writing frame; when the refresh frequency is 1Hz, on the basis of 60Hz, one data frame is used as the writing frame, and the other data frames are used as the holding frame, and only the data is written in the writing frame Write, data is not written in the hold frame. In the pixel circuit, when data is written, it needs to pass through the driving transistor, so the operation of the driving transistor for the data frame and the holding frame are different, so the characteristics of the driving transistor are different. In the case that the luminous time of each data frame is the same, the characteristic bias of the driving transistor plays a dominant role, resulting in brightness differences in different data frames. Especially in low-frequency display, there will be a phenomenon of periodic flickering, thereby reducing the display quality.

Based on the above problems, an embodiment of the present invention provides a method for driving a display panel. FIG. 1 is a driving method of a display panel provided by an embodiment of the present invention. The driving method may be executed by a driving device, which may be a driving chip. Referring to FIG. 1, the driving method of the display panel provided by the embodiment of the present invention includes:

S110. Acquire luminous data of the display panel in a display frame; wherein, a display frame includes multiple subframes, and the luminous data includes first luminous time corresponding to the multiple subframes.

Fig. 2 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention, and Fig. 3 is a driving timing waveform diagram of a pixel circuit provided by an embodiment of the present invention. Combining Fig. 2 and Fig. 3, in this embodiment, the display panel It includes a pixel circuit, through which the light-emitting diode D1 is driven to emit light to realize picture display. Wherein, the second transistor Q2 and the third transistor Q3 are used to respectively respond to the first scan signal S1 and the fourth scan S4 to conduct in the initialization phase, so as to respectively reset the gate of the first transistor Q1 and the anode of the light emitting diode D1, The first transistor Q1 is a drive transistor; the fourth transistor Q4 is used to respond to the second scan signal S2 and turn on in the data writing phase to transmit the data voltage on the data line Data to the gate of the first transistor Q1, and the fifth transistor Q5 is configured to be turned on in response to the third scan signal S3 to compensate the threshold voltage of the first transistor Q1. The sixth transistor Q6 and the seventh transistor Q7 are used to respond to the light-emitting control signal EM to conduct in the light-emitting phase, so that the first transistor Q1 generates a driving current, thereby driving the light-emitting diode D1 to emit light.

Wherein, the light emitting control signal EM is usually a high-low level signal. The light emitting time of each subframe can be adjusted by controlling the duty cycle of the light emitting control signal EM. For example, the low-level signal of the light-emitting control signal EM is an effective signal. When the light-emitting control signal EM is low-level, the display panel emits light; when the light-emitting control signal EM is high-level, the display panel does not emit light. By controlling the duration of the low level of the light emitting control signal EM, the light emitting time of the display panel can be controlled.

Referring to FIG. 3 , in this embodiment, the acquired luminescence data includes first luminescence times corresponding to multiple subframes. Specifically, in a display frame, the first subframe is a write-in frame, and the first light-emitting time corresponding to the write-in frame is t1; except for the first subframe, all other subframes are hold frames, and each hold The first light-emitting time corresponding to the frame is respectively t2...tn, wherein n is a positive integer greater than or equal to 2. Here, the first lighting time corresponding to each subframe is the same, that is, t1=t2=...tn.

Certainly, in other embodiments, the first light-emitting time corresponding to each subframe may also be different.

S120. Determine luminous luminances respectively corresponding to the plurality of subframes in the luminous data.

Specifically, after the luminous data corresponding to each subframe is acquired, the luminous luminances respectively corresponding to the plurality of subframes are determined according to the luminous data. Wherein, in the case that the first light-emitting time corresponding to each sub-frame 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.

S130. Determine a second light-emitting time corresponding to the multiple sub-frames according to the obtained difference between the light-emitting luminance of the multiple sub-frames and the reference luminance.

Specifically, due to the different characteristics of the first transistor Q1 in the pixel circuit, there are differences in the luminous luminance corresponding to each subframe, and the second transistor Q1 corresponding to each subframe is determined according to the difference between the luminous luminance of each subframe and the reference luminance. Glow time. That is to say, for a subframe whose luminous luminance deviates from the reference luminance, the luminous luminance corresponding to the subframe is adjusted by adjusting the luminous time of the subframe. Wherein, the light emitting time is determined by the light emitting control signal EM, and the light emitting time can be adjusted by adjusting the duty ratio of the light emitting control signal EM.

FIG. 4 is a driving timing waveform diagram of another pixel circuit according to an embodiment of the present invention. Referring to FIG. 4 , the light-emitting luminance of multiple sub-frames is negatively correlated with the second light-emitting time. Exemplarily, if the luminous brightness corresponding to the first subframe is greater than the reference luminance, the luminous time of the first subframe may be reduced according to the difference between the two, so as to reduce the luminous brightness of the first subframe. If the luminous brightness corresponding to the first subframe is lower than the reference luminance, the luminous time of the first subframe may be increased according to the difference between the two, so as to increase the luminous brightness of the first subframe. Similarly, the second lighting time corresponding to each subframe may be sequentially determined, so as to reduce brightness differences between different subframes. As shown in Figure 4, the second light emitting time t11 corresponding to the first subframe is not equal to the second light emitting time t21 corresponding to the second subframe, and the corresponding second light emitting time can be adjusted according to the actual light emitting brightness of the mth subframe time tm. Wherein, m is a positive integer greater than or equal to 2.

It should be noted that the light-emitting luminance of multiple sub-frames here is obtained according to the first light-emitting time, therefore, the second light-emitting time obtained according to the difference between the light-emitting luminance of multiple sub-frames and the reference brightness is obtained after the first light-emitting time. obtained on a time basis. That is, the second luminous time is obtained by adjusting the first luminous time.

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

S140. Control the display panel to emit light according to the second lighting time.

The driving method of the display panel provided by the embodiment of the present invention obtains the luminescence data of multiple subframes in a display frame, wherein the luminescence data includes the first luminescence time corresponding to the multiple subframes, and then determines the multiple subframes according to the obtained luminescence data and then determine the second light-emitting time corresponding to the plurality of sub-frames according to the difference between the light-emitting brightness of the multiple sub-frames and the reference brightness, and control the display panel to emit light according to the second light-emitting time. Due to the difference in the characteristics of the driving transistors in the display panel, the luminance of each sub-frame at the first luminous time is different. Compared with the prior art, the technical solution provided by the embodiment of the present invention is based on the fact that each sub-frame is at the first luminous time. The difference between the corresponding luminous brightness and the reference luminance determines the second luminous time to achieve the purpose of adjusting the first luminous time, and controls the display panel to emit light according to the second luminous time to reduce the brightness of each subframe under the second luminous time. The brightness difference can be improved, thereby improving the flickering problem of the display panel under low-frequency display, thereby improving the display quality.

Fig. 5 is a flow chart of another display panel driving method provided by an embodiment of the present invention. Referring to Fig. 5, on the basis of the above-mentioned embodiment, the steps of determining the luminous luminance corresponding to the plurality of subframes in the luminous data specifically include:

S1201. For each subframe, determine the luminous brightness corresponding to each subframe in an integral manner.

Specifically, the luminous brightness is equal to the product of the luminous intensity and the luminous time, and within a frame, the longer the luminous time, the greater the corresponding luminous brightness. Fig. 6 is a schematic diagram of the luminous brightness at the first luminous time provided by the embodiment of the present invention. Referring to Fig. 6, taking the refresh rate of 1 Hz as an example, the time of each frame is 1s, and one frame includes 60 sub-frames. The first subframe is a write frame, and the remaining 59 subframes are all hold frames, and the time of each subframe is 1/60s. Therefore, the lighting time of each subframe is less than 1/60s. For each subframe, the luminous brightness corresponding to the subframe can be obtained through the integral operation of the subframe at the first luminous time.

FIG. 7 is a flow chart of another display panel driving method provided by an embodiment of the present invention. Referring to FIG. 7 , on the basis of the above-mentioned technical solutions, the display panel driving method provided by the embodiment of the present invention includes:

S110. Acquire luminous data of the display panel in a display frame; wherein, a display frame includes multiple subframes, and the luminous data includes first luminous time corresponding to the multiple subframes.

S120. Determine luminous luminances respectively corresponding to the plurality of subframes in the luminous data.

S1301. Using the luminous luminance corresponding to a stable luminance subframe as a reference luminance, determine a second luminous time corresponding to an unsteady luminance subframe based on the brightness difference between the luminous luminance of multiple subframes and the reference luminance.

Specifically, because the driving transistor has been biased for a long time, the threshold characteristic drifts, so when switching to a new display frame, the luminous brightness will jump momentarily (as shown by the dotted line box in Figure 6), and then gradually stabilize . Therefore, in the plurality of subframes, a subframe with stable luminance and a subframe with unsteady luminance are included.

Fig. 8 is a partially enlarged schematic diagram of the luminous brightness curve shown in Fig. 6. Referring to Fig. 8, regions A, B, C and D all correspond to subframes with unsteady brightness, wherein region A may correspond to the first subframe, and region B may correspond to the first subframe. Corresponding to the second subframe, area C may correspond to the third subframe, and area D may 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 4 subframes have a luminance jump, and the luminous luminance of the subsequent subframes is relatively stable. Therefore, it is necessary to adjust the first luminous time of the first 4 subframes to reduce the difference with the rest of the subframes. brightness difference between.

Here, the luminous luminance corresponding to a stable luminance sub-frame can be used as the reference luminance, for example, the luminance of the E area is used as the reference luminance, and the luminous luminance LE of the E area is determined by integral means as the reference luminance. Similarly, the luminance of A, B, C and D areas are respectively determined in an integral manner, wherein the luminance of A area is LA, the luminance of B area is LB, the luminance of C area is LC, and the luminance of D area is LC. Brightness is LD.

Based on the luminance difference between the luminous luminance of each subframe and the reference luminance, the luminous time of each subframe is adjusted, and the adjusted luminous time is the second luminous time. In this embodiment, the following relationship is satisfied between the second lighting time and the reference brightness:

TN=T0-LN/T0*(LN-Lave);

Wherein, TN is the second lighting time corresponding to the Nth subframe, T0 is the first lighting time, LN is the lighting brightness corresponding to the Nth subframe, and Lave is the reference brightness.

According to the above formula, the second light-emitting time TA=T0-LA/T0*(LA-LE) corresponding to the first subframe, and the light-emitting time TB=T0-LB/T0*(LB-LE) corresponding to the second subframe ), the second light-emitting time TC=T0-LC/T0*(LC-LE) corresponding to the third subframe, and the second light-emitting time TD=T0-LD/T0*(LD-LE) corresponding to the fourth subframe. Referring to FIG. 4, in the light emission control signal EM corresponding to each subframe, the duration of the active level of the light emission control signal EM is t11=TA, t21=TB...and so on. The greater the brightness difference between the luminous luminance corresponding to the non-stable luminance sub-frame and the reference luminance, the shorter the second luminous time of the non-stable luminance sub-frame. By setting the second luminous time, the threshold value characteristic of the driving transistor Correcting the luminance difference caused by the offset can reduce the luminance difference between the non-stable luminance sub-frame and the stable luminance sub-frame, which is beneficial to improve the flickering phenomenon of the display panel, thereby improving the display quality.

Further, 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.

S140. Control the display panel to emit light according to the second lighting time.

Certainly, there may be other ways of determining the reference brightness, which will be described one by one through the following embodiments.

FIG. 9 is a flow chart of another display panel driving method provided by an embodiment of the present invention. Referring to FIG. 9 , on the basis of the above technical solutions, optionally, the display panel driving method provided by an embodiment of the present invention includes :

S110. Acquire luminous data of the display panel in a display frame; wherein, a display frame includes multiple subframes, and the luminous data includes first luminous time corresponding to the multiple subframes.

S120. Determine luminous luminances respectively corresponding to the plurality of subframes in the luminous data.

S1302. Using the average luminous luminance corresponding to multiple subframes with stable luminance as a reference luminance, determine a second luminous time corresponding to a subframe with unstable luminance based on a luminance difference between the luminous luminance of multiple subframes and the reference luminance.

Specifically, compared to the technical solution shown in FIG. 7 that uses the luminous brightness corresponding to one stable luminance subframe as the reference luminance, using the average luminous luminance of multiple stable luminance subframes as the reference luminance can further reduce the unsteady luminance subframe. Luminance difference between subframes with stable luma. For example, the average brightness of the E, F, and G regions can be used as the reference brightness, and the luminous brightness LE, LF, and LG of the E, F, and G regions can be respectively determined by an integral method, then the reference brightness Lave=(LE+LF+LG)/ 3. Therefore, based on the second light emission time TA=T0-LA/T0*(LA-Lave) corresponding to the first subframe after the reference brightness adjustment, the light emission time TB=T0-LB/T0* corresponding to the second subframe (LB-Lave), the second luminescence time TC=T0-LC/T0*(LC-Lave) corresponding to the third subframe, the second luminescence time TD=T0-LD/T0*(LD -Lave).

S140. Control the display panel to emit light according to the second lighting time.

The above technical solutions are all described by taking the luminous luminance of the non-stable luminance sub-frame higher than the luminous luminance of the stable luminance sub-frame as an example. However, in the actual working process of the display panel, the luminance of sub-frames with unstable luminance may be lower than the luminance of sub-frames with stable luminance, so the above-mentioned technical solutions are still applicable and will not be repeated here.

FIG. 10 is a flow chart of another display panel driving method provided by an embodiment of the present invention. Referring to FIG. 10 , on the basis of the above technical solutions, optionally, the display panel driving method provided by the embodiment of the present invention includes :

S110. Acquire luminous data of the display panel in a display frame; wherein, a display frame includes multiple subframes, and the luminous data includes first luminous time corresponding to the multiple subframes.

S120. Determine luminous luminances respectively corresponding to the plurality of subframes in the luminous data.

S1303. Using the luminous luminance corresponding to any subframe in the non-stable luminance subframes as a reference luminance, determine the second luminous time corresponding to the multiple subframes based on the brightness difference between the luminous luminance of the multiple subframes and the reference luminance.

Specifically, since the luminance jump generated by the non-stable luminance sub-frame is caused by the threshold characteristic drift of the drive transistor, the luminance difference between the luminous luminance of the non-stable luminance sub-frame and the luminous luminance of the stable luminance sub-frame will not too large, as shown in Figure 8. Therefore, it is also possible to use the luminous luminance corresponding to any subframe in the non-stable luminance subframe as the reference luminance, and adjust the luminous luminance of the remaining subframes in the non-stable luminance subframe and the luminous brightness of the stable luminance subframe to be consistent with the reference luminance , so as to achieve the consistency of the luminance of each subframe. Exemplarily, taking the luminous brightness of area A as LA as the reference luminance, the second luminous time TB=T0-LB/T0*(LB-LA) corresponding to the subframe of area B, here, since LB<LA, TB> T0. That is to say, by increasing the second luminous time of the subframes in the B region, the luminous brightness of the subframes in the B region is consistent with the luminous brightness of the subframes in the A region, thereby reducing the brightness difference. The second light-emitting time corresponding to each subsequent subframe still satisfies the above formula, and will not be repeated here.

S140. Control the display panel to emit light according to the second lighting time.

In this embodiment, the second light-emitting time is set according to the difference between the actual light-emitting luminance of each sub-frame and the reference luminance, so as to correct the luminance difference caused by the shift of the threshold characteristic of the driving transistor, which can reduce the The luminance difference between the sub-frames with unsteady luminance and the sub-frames with stable luminance is beneficial to improve the flicker phenomenon of the display panel at low refresh rate, thereby improving the display quality.

Optionally, an embodiment of the present invention further provides a driving device for a display panel, configured to execute the driving method provided in any of the above embodiments, and the driving device may be a driving chip. FIG. 11 is a schematic structural diagram of a driving device for a display panel provided by an embodiment of the present invention. Referring to FIG. 11 , the driving device includes:

The luminous data acquisition module 11 is configured to acquire luminous data in at least one display frame of the display panel; wherein, a display frame includes multiple subframes, and the luminous data includes first luminous time corresponding to the multiple subframes.

The luminous brightness determination module 12 is configured to determine the luminous luminances respectively corresponding to a plurality of subframes in the luminous data.

The light-emitting time adjustment module 13 is configured to determine the second light-emitting time corresponding to the multiple sub-frames according to the obtained difference between the light-emitting brightness of the multiple sub-frames and the reference brightness.

The driving module 14 is configured to control the display panel to emit light according to the second lighting time.

Wherein, the luminous time adjustment module is specifically used for: taking the luminous luminance corresponding to a stable luminance subframe as the reference luminance, and determining the second luminous time corresponding to the non-stable luminance subframe based on the luminance difference between the luminous luminance of multiple subframes and the reference luminance .

or,

Taking the average luminous brightness corresponding to the plurality of subframes with stable luminance as the reference luminance, and determining the second luminous time corresponding to the subframe with unsteady luminance based on the brightness difference between the luminous brightness of the multiple subframes and the reference brightness.

Alternatively, taking the luminous luminance corresponding to any subframe in the non-stable luminance subframes as the reference luminance, and determining the second luminous time corresponding to the multiple subframes based on the brightness difference between the luminous luminance of the multiple subframes and the reference luminance.

In the technical solution provided by the embodiment of the present invention, by acquiring the luminescence data of multiple subframes in a display frame, wherein the luminescence data includes the first luminescence time corresponding to the multiple subframes, and then according to the obtained luminescence data, determine the respective corresponding Then determine the second light-emitting time corresponding to the plurality of sub-frames according to the difference between the light-emitting brightness and the reference brightness, and control the display panel to emit light according to the second light-emitting time. Due to the difference in the characteristics of the driving transistors in the display panel, the luminance of each sub-frame at the first luminous time is different. Compared with the prior art, the technical solution provided by the embodiment of the present invention is based on the fact that each sub-frame is at the first luminous time. The difference between the corresponding luminous brightness and the reference luminance determines the second luminous time to achieve the purpose of adjusting the first luminous time, and controls the display panel to emit light according to the second luminous time to reduce the brightness of each subframe under the second luminous time. The brightness difference can be improved, thereby improving the flickering problem of the display panel under low-frequency display, thereby improving the display quality.

Optionally, an embodiment of the present invention further provides a display panel, the display panel includes a pixel circuit and a driving device for the display panel provided in any embodiment of the present invention, so the display panel also has the features described in any of the above embodiments. Beneficial effect. Wherein, the pixel circuit is not limited to the pixel circuit provided in the above embodiments, and the pixel circuit may also have other structures. Fig. 12 is a schematic structural diagram of a display panel provided by an embodiment of the present invention. In this embodiment, the display panel can be applied to a mobile phone as shown in Fig. 12, or to any electronic product with a display function, including But not limited to the following categories: TV sets, notebook computers, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, vehicle displays, medical equipment, industrial control equipment, touch interactive terminals, etc. No special restrictions are made.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, each step described in the present invention may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution of the present invention can be achieved, there is no limitation herein.

The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for driving a display panel, comprising: Acquiring luminescence data of the display panel in a display frame; wherein, a display frame includes a plurality of subframes, and the luminescence data includes a first luminescence time corresponding to the plurality of subframes; determining the luminous luminance corresponding to the plurality of subframes in the luminous data; determining the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness; The display panel is controlled to emit light according to the second light emitting time. 2. The driving method of the display panel according to claim 1, wherein the plurality of subframes comprises a stable brightness subframe and an unsteady brightness subframe; The step of determining the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness includes: Taking the luminous luminance corresponding to one subframe with stable luminance as the reference luminance, and determining the second luminance corresponding to the subframe with unstable luminance based on the brightness difference between the luminous luminance of the multiple subframes and the reference luminance 2 luminous time; or, Taking the average luminous luminance corresponding to the plurality of stable luminance subframes as the reference luminance, and determining the luminance corresponding to the non-stable luminance subframe based on the brightness difference between the luminous luminance of the multiple subframes and the reference brightness. Describe the second luminescence time. 3 . The driving method of the display panel according to claim 2 , wherein the second light emitting time of the stable brightness sub-frame is equal to the first light emitting time. 4 . 4. The driving method of the display panel according to claim 1, wherein the plurality of subframes comprises a stable brightness subframe and an unsteady brightness subframe; The step of determining the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness includes: Taking the luminous luminance corresponding to any subframe in the subframes with non-stable luminance as the reference luminance, and determining the corresponding luminance of multiple subframes based on the luminance difference between the luminous luminance of the multiple subframes and the reference luminance the second glow time. 5. The driving method of the display panel according to any one of claims 1-4, wherein the second light-emitting time and the reference brightness satisfy the following relationship: TN=T0-LN/T0*(LN-Lave); Wherein, TN is the second lighting time corresponding to the Nth subframe, T0 is the first lighting time, LN is the lighting brightness corresponding to the Nth subframe, and Lave is the reference brightness. 6 . The driving method of the display panel according to claim 1 , wherein the luminous brightness of the plurality of sub-frames is negatively correlated with the second luminous time. 7. The method for driving a display panel according to claim 1, wherein the step of determining the respective luminous luminances corresponding to 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 in an integral manner. 8. A drive device for a display panel, comprising: A luminescence data acquisition module, configured to acquire luminescence data in at least one display frame of the display panel; wherein, one display frame includes a plurality of subframes, and the luminescence data includes a first luminescence time corresponding to the plurality of subframes; A luminous brightness determination module, configured to determine the luminous brightness corresponding to the plurality of subframes in the luminous data; A light-emitting time adjustment module, configured to determine the second light-emitting time corresponding to the plurality of sub-frames according to the obtained difference between the light-emitting brightness of the plurality of sub-frames and the reference brightness; A driving module, configured to control the display panel to emit light according to the second lighting time. 9. The driving device of the display panel according to claim 8, wherein the plurality of subframes include a stable brightness subframe and an unsteady brightness subframe, and the light emitting time adjustment module is specifically used for: Taking the luminous brightness corresponding to one subframe with stable luminance as the reference luminance, and determining the first luminance corresponding to the non-stable luminance subframe based on the brightness difference between the luminous brightness of the multiple subframes and the reference brightness Two luminous time; or, Taking the average luminous luminance corresponding to the plurality of stable luminance subframes as the reference luminance, and determining the first luminance corresponding to the non-stable luminance subframe based on the brightness difference between the luminous luminance of the multiple subframes and the reference brightness. Two luminous time; or, Taking the luminous luminance corresponding to any subframe in the subframes with non-stable luminance as the reference luminance, and determining the corresponding luminance of multiple subframes based on the luminance difference between the luminous luminance of the multiple subframes and the reference luminance the second glow time. 10. A display panel, characterized by comprising a pixel circuit and a driving device for the display panel according to any one of claims 8-9.

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