CN114023235A

CN114023235A - Driving method of display panel, electronic device, and computer-readable storage medium

Info

Publication number: CN114023235A
Application number: CN202111329479.XA
Authority: CN
Inventors: 曹铮; 唐韬; 王发永
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-02-08
Anticipated expiration: 2041-11-10
Also published as: CN114023235B

Abstract

The embodiment of the application provides a driving method of a display panel, electronic equipment and a computer readable storage medium, wherein the method comprises the following steps: under the condition that the first brightness level is less than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale; correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after correcting the second brightness level; determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level; and driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale. The embodiment of the application can improve and even eliminate the color cast problem of the display panel in low brightness.

Description

Driving method of display panel, electronic device, and computer-readable storage medium

Technical Field

The present application relates to the field of display technologies, and in particular, to a driving method of a display panel, an electronic device, and a computer-readable storage medium.

Background

With the continuous development of display technology, the application of display panels is becoming more and more widespread. In order to ensure that the display panel can display different brightness, the brightness of the display panel is usually required to be adjusted. At present, the brightness adjustment method of the display panel can adopt Pulse Width Modulation (PWM) dimming at low brightness.

However, the inventors of the present application have found that when PWM dimming is used at low luminance, the display panel often suffers from color shift.

Disclosure of Invention

The embodiment of the application provides a driving method of a display panel, an electronic device and a computer readable storage medium, which can improve or even eliminate the color cast problem of the display panel at low brightness.

In a first aspect, an embodiment of the present application provides a method for driving a display panel, where the method includes: under the condition that the first brightness level is less than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale; correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after correcting the second brightness level; determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level; and driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale.

According to an embodiment of the first aspect of the present application, before acquiring the first data voltage value corresponding to the second luminance level at the current gray scale and the predetermined data voltage compensation parameter corresponding to the current gray scale, the method may further include: obtaining N test display panels, wherein N is a positive integer; determining a third brightness level of each test display panel in a first state under the target gray scale, wherein the first state comprises that the absolute value of the difference value between the color coordinate of the test display panel and the preset reference color coordinate is equal to a preset error threshold value; and obtaining a second brightness level according to the third brightness levels of the N test display panels.

Therefore, the second brightness level is obtained according to the third brightness level of the plurality of test display panels in the first state under the target gray scale, so that the influence of errors existing in the third brightness level corresponding to one or a small number of other test display panels on the finally determined second brightness level can be reduced, and the obtained second brightness level is more accurate.

According to any of the foregoing embodiments of the first aspect of the present application, obtaining the second brightness level according to the third brightness levels of the N test display panels may specifically include: calculating the average value of the N third brightness levels, taking the average value as a second brightness level, wherein the N third brightness levels correspond to the N test display panels one by one; or acquiring median of N third brightness levels, and taking the median as a second brightness level; alternatively, the mode of the N third luminance levels is acquired, and the mode is taken as the second luminance level.

Therefore, the second brightness level is obtained by obtaining the average value, the median or the mode of the third brightness levels corresponding to the multiple test display panels, so that the influence of errors existing in the third brightness levels corresponding to one or other few test display panels on the finally determined second brightness level can be reduced, for example, when the median or the mode is taken, the finally obtained second brightness level is not influenced by the larger numerical value and the smaller numerical value in the third brightness levels corresponding to the multiple test display panels, and the obtained second brightness level is more accurate.

According to any of the preceding embodiments of the first aspect of the present application, after acquiring N test display panels, the method may further include: for an ith test display panel, acquiring a third data voltage value and a fourth data voltage value corresponding to a jth gray scale of the ith test display panel when the ith test display panel is at a third brightness level corresponding to the ith test display panel, wherein the third data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in a first state, the fourth data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in a second state, the second state comprises that an absolute value of a difference value of a color coordinate of the ith test display panel and a preset reference color coordinate is smaller than a preset error threshold, the jth gray scale is any gray scale of a plurality of preset gray scales, i is not more than N, and i and j are positive integers; and obtaining a data voltage compensation parameter corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels.

Therefore, compared with a mode of obtaining the data voltage compensation parameters corresponding to each gray scale through manual experience or simulation, in the embodiment of the application, the data voltage compensation parameters corresponding to each gray scale are obtained according to the third data voltage values, measured by a plurality of test display panels, when color cast occurs and the fourth data voltage values, measured by the plurality of test display panels, when color cast does not occur, so that the obtained data voltage compensation parameters corresponding to each gray scale can more accurately and objectively accord with actual conditions, namely the obtained data voltage compensation parameters corresponding to each gray scale are more accurate.

According to any one of the foregoing embodiments of the first aspect of the present application, obtaining the data voltage compensation parameter corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels may specifically include: calculating a relation parameter between a third data voltage value corresponding to the jth gray scale of the ith test display panel and a fourth data voltage value corresponding to the jth gray scale of the ith test display panel, wherein the relation parameter comprises a difference value or a ratio value; and obtaining a data voltage compensation parameter corresponding to the jth gray scale according to N relation parameters corresponding to the jth gray scale of the N test display panels, wherein the N relation parameters correspond to the N test display panels one by one.

According to any one of the embodiments of the first aspect of the present application, obtaining the data voltage compensation parameter corresponding to the jth gray scale according to the N relation parameters corresponding to the jth gray scale of the N test display panels specifically includes: calculating the average value of the N relational parameters, and taking the average value of the N relational parameters as a data voltage compensation parameter corresponding to the jth gray scale; or acquiring median of the N relational parameters, and taking the median of the N relational parameters as a data voltage compensation parameter corresponding to the jth gray scale; or obtaining the mode of the N relational parameters, and taking the mode of the N relational parameters as the data voltage compensation parameter corresponding to the jth gray scale.

Therefore, the data voltage compensation parameter corresponding to the jth gray scale is obtained by obtaining the average value, the median or the mode of the relation parameters of the multiple test display panels at the jth gray scale, so that the influence of the error of the relation parameter of one or a few other test display panels at the jth gray scale on the finally determined second brightness level can be reduced, for example, when the median or the mode is taken, the finally obtained data voltage compensation parameter corresponding to the jth gray scale is not influenced by the larger numerical value and the smaller numerical value of the relation parameters of the multiple test display panels at the jth gray scale, and the obtained data voltage compensation parameter corresponding to the jth gray scale is more accurate.

According to any one of the foregoing embodiments of the first aspect of the present application, before acquiring the first data voltage value corresponding to the second brightness level at the current gray scale and the predetermined data voltage compensation parameter corresponding to the current gray scale, the method may further include: selecting M1 gray scales as first gray scales from preset M gray scales, wherein M1 is more than M, and M1 and M are positive integers; acquiring a data voltage compensation parameter corresponding to each gray scale in the first gray scale; and processing the data voltage compensation parameter corresponding to each gray scale in the first gray scale based on a linear interpolation algorithm to obtain data voltage compensation parameters corresponding to other gray scales except the first gray scale in the M gray scales.

Therefore, the data voltage compensation parameters corresponding to part of gray scales are obtained by calculation through a linear interpolation algorithm, so that the calculation amount of the part of gray scales in determining the data voltage compensation parameters can be greatly reduced, and the time of the process of determining the data voltage compensation parameters corresponding to M gray scales is shortened on the whole.

According to any of the foregoing embodiments of the first aspect of the present application, determining the data voltage value corresponding to the first luminance level at the current gray scale according to the second data voltage value, the first luminance level and the second luminance level may specifically include: determining a data voltage value corresponding to the first brightness level at the current gray scale according to the following expression:

where Vdata represents a data voltage value corresponding to the first luminance level at the current gray level, k represents a preset correction coefficient, L1 represents the first luminance level, L2 represents the second luminance level, and Vdata2 represents the second data voltage value.

According to any one of the foregoing embodiments of the first aspect of the present application, the display panel may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the second data voltage value includes a first sub-data voltage value corresponding to the red sub-pixel, a second sub-data voltage value corresponding to the green sub-pixel, and a third sub-data voltage value corresponding to the blue sub-pixel; determining a data voltage value corresponding to the first brightness level at the current gray scale according to the second data voltage value, the first brightness level and the second brightness level, which may specifically include: determining a data voltage value corresponding to the red sub-pixel of the first brightness level under the current gray scale according to the first sub-data voltage value, the first brightness level and the second brightness level; determining a data voltage value corresponding to the green sub-pixel of the first brightness level under the current gray scale according to the second sub-data voltage value, the first brightness level and the second brightness level; and determining the data voltage value corresponding to the blue sub-pixel of the first brightness level under the current gray scale according to the third sub-data voltage value, the first brightness level and the second brightness level.

In a second aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for driving a display panel according to any of the embodiments of the first aspect of the present application.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for driving the display panel according to any one of the embodiments of the first aspect of the present application.

The display panel driving method, the electronic device and the computer-readable storage medium according to the embodiment of the application include: under the condition that the first brightness level is less than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale; correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after correcting the second brightness level; determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level; and driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale. According to the embodiment of the application, the first data voltage value corresponding to the second brightness level under the current gray scale is compensated, and the data voltage value corresponding to the first brightness level under the current gray scale is indirectly compensated, so that the color cast problem of the display panel under the first brightness level is improved and even eliminated. In addition, the data voltage values of a plurality of display panels of at least the same type or the same batch can be compensated based on the predetermined data voltage compensation parameters, so that the data voltage value of each display panel is prevented from being calculated one by one through a traditional calculation mode, and the production efficiency is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 schematically illustrates a dimming manner applied to an embodiment of the present application;

FIG. 2 is a schematic current diagram of sub-pixels of each color at low luminance;

fig. 3 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present disclosure;

fig. 4 is another schematic flow chart illustrating a driving method of a display panel according to an embodiment of the present disclosure;

fig. 5 is a schematic flowchart of another driving method of a display panel according to an embodiment of the present disclosure;

FIG. 6 is a schematic flow chart of step S402 in the embodiment shown in FIG. 5;

fig. 7 is a schematic structural diagram of a driving apparatus of a display panel according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Before explaining the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically explains the problems existing in the prior art:

as described above, the inventors of the present application have found that when PWM dimming is performed at low luminance, the display panel generally has a color shift problem.

In order to solve the color shift problem of the display panel, the inventors of the present application first conducted research and analysis on the root causes leading to the above technical problems, and the specific research and analysis processes are as follows:

fig. 1 schematically shows a dimming manner applied to an embodiment of the present application. The abscissa in fig. 1 represents register values of a register of a preset type, such as 51 registers; the ordinate in fig. 1 represents luminance. As shown in fig. 1, the 51 register value range may be 0 to 4095, and an EM duty dimming method (or pulse width modulation PWM dimming method) is adopted in a low luminance interval of 0 to L1, and in the low luminance interval, when the 51 register value is adjusted, the duty ratio of the light emitting stage (the duty ratio of the low level of the light emitting control signal emit) is changed, and the drive current flowing through the light emitting element is not changed, that is, the duty ratio of the light emitting stage is adjusted by adjusting the 51 register value, thereby controlling the luminance to be changed. In the middle-high brightness interval of L1-4095, a Source dimming mode (or called data voltage dimming mode) is adopted, in which if the register value is adjusted to 51, the driving current flowing through the light-emitting element changes, and the duty ratio in the light-emitting stage is not changed, that is, the driving current flowing through the light-emitting element is adjusted by adjusting the register value to 51, thereby controlling the brightness to change.

The inventor of the present application finds that when the EM duty dimming mode is adopted in the low brightness region, the display panel may have a color shift problem. In this regard, the inventors have studied the root cause causing the technical problem and finally found that: as shown in fig. 2, when the emission control signal emit is at a high level, the current of the light emitting element is 0, and the light emitting element does not emit light; when the light emission control signal emit is at a low level, the anode of the light emitting element D is gradually charged to a normal operating potential, the current of the light emitting element D gradually reaches a normal operating current, and the light emitting element D emits light. However, the inventors of the present application have found that, due to the different inherent properties of the device light emission efficiency of the sub-pixels of each color at the same gray scale, the on-time periods of the sub-pixels of different colors are different, i.e., the time for which the sub-pixels of different colors are charged to the saturation current is different. For example, the red sub-pixel R and the blue sub-pixel B will start to light first, and the green sub-pixel G will start to light later, i.e. the lighting time period T31-G of the green sub-pixel G is longer than the lighting time period T31-R of the red sub-pixel R and the lighting time period T31-B of the blue sub-pixel B, so that the effective light emitting time periods of the sub-pixels of the respective colors are different. Particularly, in the case where the duty ratio of the low level of the emission control signal emit is small, the on-time period T31-G of the green sub-pixel G is relatively large, and the effective emission time period T32 of the green sub-pixel G is smaller than the effective emission time periods of the red sub-pixel R and the blue sub-pixel B, which causes color shift or color shift phenomenon of the display panel.

In the related art, for a display panel adopting the EM duty dimming method in the low luminance section, if the display panel has a color shift phenomenon, the method usually adopted is to recalibrate the data voltage value of the red sub-pixel, the data voltage value of the green sub-pixel, and the data voltage value of the blue sub-pixel corresponding to each 51 register value in the low luminance section of the display panel, and the calibration process is very complicated, thereby greatly reducing the production efficiency of the display panel.

In view of the above research by the inventors, embodiments of the present application provide a driving method of a display panel, an electronic device, and a computer-readable storage medium, which can solve the problem of color shift of the display panel.

The technical idea of the embodiment of the application is as follows: under the condition that the first brightness level is less than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale; correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after correcting the second brightness level; determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level; and driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale. Namely, the first data voltage value corresponding to the second brightness level under the current gray scale is compensated, so that the data voltage value corresponding to the first brightness level under the current gray scale is indirectly compensated, and the color cast problem of the display panel under the first brightness level is improved or even eliminated.

Compared with the mode that the data voltage value of each display panel needs to be recalculated one by one in the related art, the data voltage value of a plurality of display panels of at least the same type or the same batch can be compensated based on the predetermined data voltage compensation parameter, the data voltage value of each display panel is prevented from being calculated one by one through a traditional calculation mode, and the production efficiency is greatly improved.

In addition, the inventor of the present application finds that, in a low luminance range, the data voltage value of the display panel is calculated by using a conventional calculation method, and the obtained data voltage value is often deviated greatly, so that the reject ratio of the display panel is high. By adopting the method of compensating the data voltage value of the display panel by using the data voltage compensation parameter, the compensated data voltage value is more accurate, and the reject ratio of the display panel can be reduced.

For convenience of understanding, before describing the driving method of the display panel, the electronic device, and the computer-readable storage medium provided in the embodiments of the present application, terms used in the embodiments of the present application will be described below.

In the embodiment of the present application, the brightness levels (e.g., the first brightness level, the second brightness level, and the third brightness level) may be characterized by register values (e.g., 51 register values) of a preset type of register. Taking a 51 register value as an example, the first brightness level, the second brightness level and the third brightness level can be regarded as 51 register values. For example, the first brightness level may be a first 51 register value, the second brightness level may be a second 51 register value, and the third brightness level may be a third 51 register value. The 51 register value, i.e., the 51 register value may be a value from "000" to "FFF" in hexadecimal notation. The 51 register value represents a brightness level parameter of the display panel, and different 51 register values may represent different display brightness levels when the same screen is displayed. For example, a 51 register value of "FFF" may represent the maximum display brightness level corresponding to the brightest state; as another example, a 51 register value of "000" may represent a minimum display brightness level corresponding to the darkest state. The 51 register values corresponding to the same picture may range from "000" to "FFF".

First, a driving method of the display panel provided in the embodiment of the present application will be described.

As shown in fig. 3, the method for driving a display panel according to the embodiment of the present application may include the following steps:

s101, under the condition that the first brightness level is smaller than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale;

s102, correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after correcting the second brightness level;

s103, determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level;

and S104, driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level under the current gray scale.

In the embodiment of the present application, the first brightness level may be regarded as the current brightness level, and the first brightness level may be specifically regarded as the current 51 register value. The second brightness level may be specifically considered as a predetermined reference 51 register value, or reference 51 node. The first data voltage value may be understood as a data voltage value before compensation corresponding to the second brightness level.

Specifically, in S101, for example, in the case where the current 51 register value is less than or equal to the predetermined reference 51 register value, the first data voltage value corresponding to the reference 51 register value at the current gray scale and the data voltage compensation parameter corresponding to the predetermined current gray scale are acquired.

It should be noted that both the second brightness level (reference 51 register value) and the data voltage compensation parameter may be determined before S101. The determination process of the second brightness level and the data voltage compensation parameter is described below.

As shown in fig. 4, according to some embodiments of the present application, optionally before S101, the driving method of the display panel provided by the embodiments of the present application may further include the following steps S301, S302, and S303.

S301, N test display panels are obtained, wherein N is a positive integer.

In particular, one or more display panels may be selected as test display panels, which may be used to determine the second brightness level and/or the data voltage compensation parameters. In some alternative examples, a plurality of display panels may be selected as the test display panel, so that interference of errors in the test data of one or other few test display panels with the finally determined second brightness level and/or data voltage compensation parameter may be reduced.

S302, determining a third brightness level of each test display panel in a first state under the target gray scale, wherein the first state comprises that the absolute value of the difference value between the color coordinate of the test display panel and the preset reference color coordinate is equal to a preset error threshold.

It will be readily appreciated that the first state is the critical state at which colour shift begins to occur or is apparent. Specifically, the reference color coordinate may be understood as an ideal color coordinate or a target color coordinate when color cast does not occur, and a specific numerical value of the reference color coordinate may be flexibly adjusted according to an actual situation, which is not limited in this embodiment of the present application. Illustratively, for example, the reference color coordinates may include 0.3 on the abscissa x and 0.315 on the ordinate y. That is, for example, when the color coordinates are (0.3,0.315), the display panel displays a white screen without color shift. The preset error threshold value can also be flexibly adjusted according to the actual situation, and the embodiment of the application does not limit the preset error threshold value. Illustratively, the preset error threshold may comprise 0.02, for example.

The color coordinates of the test display panel can be measured by an optical measuring device such as color analyzer CA310 or color analyzer CA 410. Specifically, in S302, for each test display panel, the 51 register value of each test display panel is adjusted, and the color coordinates of each test display panel at the target gray scale are acquired by the optical measurement device. Illustratively, the target gray level may be a maximum gray level of the display panel, such as 255 gray levels. That is, the color coordinates of each test display panel under the white screen are acquired by the optical measuring device. For the ith test display panel in the N test display panels, when the absolute value of the difference between the color coordinate of the ith test display panel and the preset reference color coordinate is greater than or equal to the preset error threshold, the current brightness level (51 register value) of the ith test display panel is taken as the third brightness level (third 51 register value) of the ith test display panel, and i is a positive integer.

It should be noted that, taking the reference color coordinates as (0.3,0.315) and the preset error threshold as 0.02 as an example, it can be understood that the color coordinates of the test display panel are not within the range of (0.3 ± 0.02,0.315 ± 0.02) when the absolute value of the difference between the color coordinates of the test display panel and the preset reference color coordinates is greater than or equal to the preset error threshold.

And S303, obtaining a second brightness level according to the third brightness levels of the N test display panels.

It will be readily appreciated that each test display panel corresponds to a third brightness level, and accordingly, there are N third brightness levels for the N test display panels. It should be noted that the N third brightness levels may be different from each other, or at least two third brightness levels may be the same, which is not limited in this embodiment of the application.

In some specific examples, N is a positive integer greater than 1. Therefore, the second brightness level is obtained according to the third brightness level of the plurality of test display panels in the first state under the target gray scale, so that the influence of errors existing in the third brightness level corresponding to one or a small number of other test display panels on the finally determined second brightness level can be reduced, and the obtained second brightness level is more accurate.

According to some embodiments of the present application, optionally, S303 may specifically include the following steps:

and calculating the average value of the N third brightness levels, and taking the average value of the N third brightness levels as the second brightness level.

Specifically, the second luminance level is determined according to the following expression:

L2＝(L1'+...+LN')/N (1)

where L2 denotes the second brightness level, L1 'denotes the third brightness level corresponding to the 1 st test display panel, LN' denotes the third brightness level corresponding to the nth test display panel, and N denotes the number of test display panels.

Thus, the second luminance level is obtained by calculating the average of the N third luminance levels.

In addition to the above manner of obtaining the average value, according to other embodiments of the present application, optionally, S303 may specifically include the following steps:

and acquiring median of the N third brightness levels, and taking the median of the N third brightness levels as a second brightness level.

According to further embodiments of the present application, optionally, S303 may specifically include the following steps:

and obtaining the mode of the N third brightness levels, and taking the mode of the N third brightness levels as the second brightness level.

It is easily understood that the obtained second luminance level (reference 51 register value) may be any one 51 register value (51 node) from 0 to L1 in fig. 1 described above. In some embodiments, the obtained second brightness level (reference 51 register value) may be, for example, node 51L 1 in fig. 1. Therefore, when the current 51 register value is less than or equal to the 51 node L1, the color shift compensation is turned on to eliminate the color shift of the display panel in the low brightness interval.

As shown in fig. 5, according to some embodiments of the present application, optionally after S301, the driving method of the display panel provided by the embodiments of the present application may further include the following steps S401 and S402.

S401, for the ith test display panel, acquiring a third data voltage value corresponding to a jth gray scale and a jth gray scale of a fourth data voltage value of the ith test display panel when the ith test display panel is at a third brightness level corresponding to the ith test display panel, wherein the jth gray scale is any gray scale of a plurality of preset gray scales, i is less than or equal to N, and i and j are positive integers. The third data voltage value is a data voltage value when the ith test display panel is in a first state, and the first state comprises that the absolute value of the difference value between the color coordinate of the test display panel and the preset reference color coordinate is equal to a preset error threshold value. The fourth data voltage value is a data voltage value when the ith test display panel is in a second state, and the second state comprises that the absolute value of the difference value between the color coordinate of the ith test display panel and the preset reference color coordinate is smaller than a preset error threshold value.

Specifically, for the ith test display panel, the luminance level of the ith test display panel is maintained at the third luminance level corresponding to the ith test display panel, that is, the 51 register value of the ith test display panel is maintained at the third 51 register value determined in S302 when the ith test display panel is subjected to color shift. And acquiring a third data voltage value corresponding to each gray scale of the ith test display panel in the first state (namely color cast occurs) when the ith test display panel is in the third 51 register value corresponding to the ith test display panel. Wherein each ashThe third data voltage values corresponding to the steps may be different. For example, when the gray scale range of the display panel is 0 to 255 gray scales, the third data voltage value V corresponding to each of the 256 gray scales of the ith test display panel in the first state can be obtained_idata0～V_idata 255. In addition, since the display panel includes sub-pixels of a plurality of colors, the third data voltage value may include a sub-data voltage value corresponding to a red sub-pixel, a sub-data voltage value corresponding to a green sub-pixel, and a sub-data voltage value corresponding to a blue sub-pixel. Specifically, the third data voltage value of the ith test display panel is obtained as follows: v_idataR255～V_idataR0,V_idataG255～V_idataG0,V_idataB255～V_idataB 0. Wherein, V₁DataR255 represents the sub-data voltage value V corresponding to the red sub-pixel at 255 gray scale of the ith test display panel in the first state₁dataR0 represents the sub-data voltage value V corresponding to the red sub-pixel at 0 gray level of the ith test display panel in the first state₁DataG255 represents the sub-data voltage value V corresponding to the green sub-pixel at 255 gray scale of the ith test display panel in the first state₁DataG0 represents the sub-data voltage value V corresponding to the green sub-pixel at 0 gray level of the ith test display panel in the first state₁dataB255 represents the sub-data voltage value V corresponding to the blue sub-pixel at 255 gray scale of the ith test display panel in the first state₁dataB0 represents the sub-data voltage value corresponding to the blue sub-pixel at 0 gray level of the ith test display panel in the first state.

And adjusting the data voltage value of the ith test display panel when the ith test display panel is in the third 51 register value corresponding to the ith test display panel, so that the ith test display panel reaches the second state. That is, the ith test display panel eliminates color shift by adjusting the data voltage value of the ith test display panel. And acquiring fourth data voltage values corresponding to all gray scales of the ith test display panel in the second state. Wherein, the fourth data voltage value corresponding to each gray scale may be different. For example, when the gray scale range of the display panelWhen the gray scale is 0-255, the fourth data voltage value V corresponding to each of the 256 gray scales of the ith test display panel in the second state can be obtained_idata0’～V_idata 255'. In addition, since the display panel includes sub-pixels of a plurality of colors, the fourth data voltage value may include a sub-data voltage value corresponding to a red sub-pixel, a sub-data voltage value corresponding to a green sub-pixel, and a sub-data voltage value corresponding to a blue sub-pixel. Specifically, the fourth data voltage value of the ith test display panel is obtained as follows: v_idataR255’～V_idataR0’,V_idataG255’～V_idataG0’,V_idataB255’～V_idataB 0'. Wherein, V₁dataR 255' represents the sub-data voltage value V corresponding to the red sub-pixel at the 255 gray level of the ith test display panel in the second state₁dataR 0' represents the sub-data voltage value V corresponding to the red sub-pixel at 0 gray level of the ith test display panel in the second state₁DataG 255' represents the sub-data voltage value V corresponding to the green sub-pixel at the 255 gray level of the ith test display panel in the second state₁DataG 0' represents the sub-data voltage value V corresponding to the green sub-pixel at the 0 gray level of the ith test display panel in the second state₁dataB 255' represents the sub-data voltage value V corresponding to the blue sub-pixel at 255 gray scale when the ith test display panel is in the second state₁dataB 0' represents the sub-data voltage value corresponding to the blue sub-pixel at 0 gray level when the ith test display panel is in the second state.

S402, obtaining data voltage compensation parameters corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels.

As shown in fig. 6, according to some embodiments of the present application, optionally, S402 may specifically include the following steps S501 and S502.

S501, calculating a relation parameter between a third data voltage value corresponding to the jth gray scale of the ith test display panel and a fourth data voltage value corresponding to the jth gray scale of the ith test display panel, wherein the relation parameter comprises a difference value or a ratio value.

In some specific examples, for example, a difference between a third data voltage value corresponding to the jth gray scale of the ith test display panel and a fourth data voltage value corresponding to the jth gray scale of the ith test display panel may be calculated.

Taking the 255 gray scale as an example, the voltage value V of the fourth data corresponding to the 255 gray scale of the ith test display panel is calculated_idata 255' and a third data voltage value V corresponding to the ith test display panel at the gray scale of 255_idata 255. In particular, V may be calculated for each color sub-pixel₁dataR 255' and V₁difference between dataR255, V can be calculated₁dataG 255' and V₁difference between dataG255, V can be calculated₁dataB 255' and V₁difference between dataB 255.

In other specific examples, for example, a ratio between a third data voltage value corresponding to the jth gray scale of the ith test display panel and a fourth data voltage value corresponding to the jth gray scale of the ith test display panel may be calculated.

Taking the 255 gray scale as an example, the voltage value V of the fourth data corresponding to the 255 gray scale of the ith test display panel is calculated_idata 255' and a third data voltage value V corresponding to the ith test display panel at the gray scale of 255_iThe ratio between data 255. In particular, V may be calculated for each color sub-pixel₁dataR 255' and V₁The ratio between dataR255, V can be calculated₁dataG 255' and V₁The ratio between dataG255, V can be calculated₁dataB 255' and V₁Ratio between dataB 255.

It should be noted that the relation coefficient between the third data voltage value and the fourth data voltage value may be a difference between the third data voltage value and the fourth data voltage value, or a difference between the fourth data voltage value and the third data voltage value, or a ratio of the third data voltage value as a numerator and the fourth data voltage value as a denominator, or a ratio of the fourth data voltage value as a numerator and the third data voltage value as a denominator, which is not limited in this embodiment of the present application.

S502, obtaining data voltage compensation parameters corresponding to the jth gray scale according to N relation parameters corresponding to the jth gray scale of the N test display panels. And the N relation parameters correspond to the N test display panels one to one.

According to some embodiments of the present application, optionally, S502 may specifically include the following steps:

and calculating the average value of the N relational parameters, and taking the average value of the N relational parameters as a data voltage compensation parameter corresponding to the jth gray scale.

Specifically, in the case that the relation parameter is a difference value, the data voltage compensation parameter corresponding to the jth gray scale may be determined according to the following expression:

ΔVdataj＝[(V₁dataj'-V₁dataj)+...+(V_Ndataj'-V_Ndataj)]/N (2)

wherein, Δ Vdataj represents a data voltage compensation parameter corresponding to the jth gray scale; v₁dataj' represents a fourth data voltage value corresponding to the jth gray scale of the 1 st test display panel; v₁dataj represents a third data voltage value corresponding to the jth gray scale of the 1 st test display panel; v_Ndataj' represents a fourth data voltage value corresponding to the jth gray scale of the Nth test display panel; v_Ndataj represents a third data voltage value corresponding to the jth gray scale of the Nth test display panel.

It should be noted that, for the sub-pixels with different colors, the data voltage compensation parameters corresponding to the sub-pixels with different colors in the jth gray scale can be obtained. With the expression (2), data voltage compensation parameters Δ VdataR255 to Δ VdataR0 for the red subpixels at 256 gray levels, data voltage compensation parameters Δ VdataG255 to Δ VdataG0 for the green subpixels at 256 gray levels, and data voltage compensation parameters Δ VdataB255 to Δ VdataB0 for the blue subpixels at 256 gray levels can be obtained, for example.

Similarly, in the case that the relation parameter is a ratio, the data voltage compensation parameter corresponding to the jth gray scale can be determined according to the following expression:

ΔVdataj＝[(V₁dataj'/V₁dataj)+...+(V_Ndataj'/V_Ndataj)]/N (3)

It should be noted that, for the sub-pixels with different colors, the data voltage compensation parameters corresponding to the sub-pixels with different colors in the jth gray scale can be obtained. With the expression (3), data voltage compensation parameters Δ VdataR255 to Δ VdataR0 for the red subpixels at 256 gray levels, data voltage compensation parameters Δ VdataG255 to Δ VdataG0 for the green subpixels at 256 gray levels, and data voltage compensation parameters Δ VdataB255 to Δ VdataB0 for the blue subpixels at 256 gray levels can be obtained, for example.

In addition to the above manner of averaging, according to other embodiments of the present application, optionally, S502 may specifically include the following steps:

and acquiring median of the N relation parameters, and taking the median of the N relation parameters as a data voltage compensation parameter corresponding to the jth gray scale.

According to still other embodiments of the present application, optionally, S502 may specifically include the following steps:

and obtaining the mode of the N relation parameters, and taking the mode of the N relation parameters as the data voltage compensation parameter corresponding to the jth gray scale.

The inventors of the present application have recognized that determining the data voltage compensation parameter in the above manner for all gray levels may result in a large amount of calculation. Therefore, in order to reduce the amount of calculation, in some embodiments, for example, a part of gray scales may be selected from the gray scales of 0 to 255, the selected part of gray scales may be determined by the above steps, and the data voltage compensation parameters of other gray scales except the part of gray scales are calculated by a linear interpolation algorithm, so as to reduce the amount of calculation.

Specifically, M1 gray scales are selected from preset M gray scales as first gray scales, M1 is less than M, and M1 and M are positive integers. The specific values of M1 and M can be flexibly adjusted according to practical situations, and are not limited in the embodiments of the present application. For example, M may be equal to 256, i.e., 0 to 255 gray levels. Then, the data voltage compensation parameter corresponding to each gray scale in the first gray scale may be obtained, specifically, the data voltage compensation parameter corresponding to each gray scale in the first gray scale may be obtained through the embodiments shown in fig. 5 and fig. 6. And finally, processing the data voltage compensation parameter corresponding to each gray scale in the first gray scale based on a linear interpolation algorithm to obtain the data voltage compensation parameters corresponding to other gray scales except the first gray scale in the M gray scales.

After the second luminance level (reference 51 register value), the data voltage compensation parameters Δ VdataR255 to Δ VdataR0 of the red sub-pixel at 256 gray levels, the data voltage compensation parameters Δ VdataG255 to Δ VdataG0 of the green sub-pixel at 256 gray levels, and the data voltage compensation parameters Δ VdataB255 to Δ VdataB0 of the blue sub-pixel at 256 gray levels are obtained through pre-calculation, the second luminance level (reference 51 register value), the data voltage compensation parameters Δ VdataR255 to Δ VdataR0 of the red sub-pixel at 256 gray levels, the data voltage compensation parameters Δ VdataG255 to Δ VdataG0 of the green sub-pixel at 256 gray levels, and the data voltage compensation parameters Δ VdataB to Δ VdataB255 VdataB0 of the blue sub-pixel at 256 gray levels may be burned into the driving IC of the display panel. Therefore, under the condition that the first register value is smaller than or equal to the second brightness level, the data voltage value corresponding to the second brightness level can be compensated based on the data voltage compensation parameter, so that the data voltage value corresponding to the first brightness level under the current gray scale is indirectly compensated, and the color cast problem of the display panel under the first brightness level is improved or even eliminated.

A specific procedure in the case where the first register value is less than or equal to the second luminance level is explained below.

With continued reference to fig. 4 or fig. 5, S102 corrects the first data voltage value according to the data voltage compensation parameter, so as to obtain a second data voltage value after the second brightness level is corrected.

The first data voltage value may be understood as a data voltage value before compensation corresponding to the second brightness level. The first data voltage value may also include a sub data voltage value VdataR corresponding to the red sub pixel_{At present}And the sub-data voltage value VdaG corresponding to the green sub-pixel_{At present}And sub data voltage values VdataB corresponding to the blue sub pixels_{At present}. In particular toIn step S102, according to the data voltage compensation parameter Δ VdataRx of the red sub-pixel at the current gray level, the sub-data voltage value VdataR corresponding to the red sub-pixel in the first data voltage value is determined_{At present}Carrying out correction; according to the data voltage compensation parameter delta VdaGx of the green sub-pixel in the current gray scale, the sub-data voltage value VdaG corresponding to the green sub-pixel in the first data voltage value_{At present}Carrying out correction; according to the data voltage compensation parameter delta VdaBx of the blue sub-pixel in the current gray scale, the sub-data voltage value VdaB corresponding to the blue sub-pixel in the first data voltage value_{At present}And correcting to obtain a second data voltage value after the second brightness level is corrected. The second brightness level corrected second data voltage value may include a corrected first sub data voltage value VdataR corresponding to the red sub pixel_{At present}', corrected second sub data voltage value VdaG corresponding to green sub pixel_{At present}', corrected third sub data voltage value Vdata A corresponding to the blue sub pixel_{At present}’。

S103, determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level.

Specifically, since the second data voltage value, the first luminance level, and the second luminance level are known, the second data voltage value, the first luminance level, and the second luminance level may be processed by a linear interpolation algorithm to obtain a data voltage value corresponding to the first luminance level at the current gray scale.

In some specific examples, the data voltage value corresponding to the first brightness level at the current gray level may be determined according to the following expression:

where Vdata represents a data voltage value corresponding to the first luminance level at the current gray level, k represents a preset correction coefficient, L1 represents the first luminance level, L2 represents the second luminance level, and Vdata2 represents the second data voltage value. It should be noted that k may be set empirically or determined through experiments based on historical data, and may be flexibly adjusted according to actual conditions, which is not limited in the embodiment of the present application.

In practical applications, the first sub data voltage value VdataR corresponding to the red sub pixel may be based on the above expression (4)_{At present}' obtaining the data voltage value VdataR corresponding to the red sub-pixel of the first brightness level under the current gray scale. May be based on the above expression (4) and the second sub data voltage value VdataG corresponding to the green sub pixel_{At present}' obtaining the data voltage value VdataG corresponding to the green sub-pixel of the first brightness level at the current gray scale. May be based on the above expression (4) and the third sub data voltage value VdataB corresponding to the blue sub pixel_{At present}' obtaining the data voltage value VdataB corresponding to the blue sub-pixel at the current gray level for the first brightness level.

Specifically, the red sub-pixel in the display panel may be driven to emit light based on the data voltage value VdataR corresponding to the red sub-pixel at the current gray scale at the first brightness level; the green sub-pixel in the display panel can be driven to emit light based on the data voltage value VdataG corresponding to the green sub-pixel under the current gray scale of the first brightness level; the blue sub-pixel in the display panel can be driven to emit light based on the data voltage value VdataB corresponding to the blue sub-pixel at the current gray scale at the first brightness level, so that the problem of color cast of the display panel at the first brightness level is improved or even eliminated.

Based on the driving method of the display panel provided by the above embodiment, correspondingly, the application also provides a specific implementation manner of the driving device of the display panel.

As shown in fig. 7, the driving apparatus 600 of the display panel provided in the embodiment of the present application includes the following modules:

an obtaining module 601, configured to obtain a first data voltage value corresponding to a current gray scale of a second brightness level and a predetermined data voltage compensation parameter corresponding to the current gray scale when the first brightness level is less than or equal to a predetermined second brightness level;

a first determining module 602, configured to correct the first data voltage value according to the data voltage compensation parameter, to obtain a second data voltage value after correcting the second brightness level;

a second determining module 603, configured to determine, according to the second data voltage value, the first luminance level, and the second luminance level, a data voltage value corresponding to the first luminance level at the current gray scale;

the driving module 604 is configured to drive the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale.

The display panel driving apparatus according to the embodiment of the present application, the display panel driving apparatus includes: an obtaining module 601, configured to obtain a first data voltage value corresponding to a current gray scale of a second brightness level and a predetermined data voltage compensation parameter corresponding to the current gray scale when the first brightness level is less than or equal to a predetermined second brightness level; a first determining module 602, configured to correct the first data voltage value according to the data voltage compensation parameter, to obtain a second data voltage value after correcting the second brightness level; a second determining module 603, configured to determine, according to the second data voltage value, the first luminance level, and the second luminance level, a data voltage value corresponding to the first luminance level at the current gray scale; the driving module 604 is configured to drive the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level at the current gray scale. According to the embodiment of the application, the first data voltage value corresponding to the second brightness level under the current gray scale is compensated, and the data voltage value corresponding to the first brightness level under the current gray scale is indirectly compensated, so that the color cast problem of the display panel under the first brightness level is improved and even eliminated. In addition, the data voltage values of a plurality of display panels of at least the same type or the same batch can be compensated based on the predetermined data voltage compensation parameters, so that the data voltage value of each display panel is prevented from being calculated one by one through a traditional calculation mode, and the production efficiency is greatly improved.

In some embodiments, the driving apparatus 600 of the display panel provided in this embodiment of the present application may further include a second brightness level determining module, configured to obtain N test display panels, where N is a positive integer; determining a third brightness level of each test display panel in a first state under the target gray scale, wherein the first state comprises that the absolute value of the difference value between the color coordinate of the test display panel and the preset reference color coordinate is equal to a preset error threshold value; and obtaining a second brightness level according to the third brightness levels of the N test display panels.

In some embodiments, the second brightness level determining module is specifically configured to calculate an average value of N third brightness levels, where the average value is used as the second brightness level, and the N third brightness levels are in one-to-one correspondence with the N test display panels; or acquiring median of N third brightness levels, and taking the median as a second brightness level; alternatively, the mode of the N third luminance levels is acquired, and the mode is taken as the second luminance level.

In some embodiments, the driving apparatus 600 of the display panel provided in this embodiment of the present application may further include a data voltage compensation parameter determining module, configured to, for an ith test display panel, obtain a third data voltage value and a fourth data voltage value corresponding to a jth gray scale of the ith test display panel when the ith test display panel is at a third brightness level corresponding to the ith test display panel, where the third data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in a first state, the fourth data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in a second state, the second state includes that an absolute value of a difference between a color coordinate of the ith test display panel and a preset reference color coordinate is smaller than a preset error threshold, the jth gray scale is any gray scale of a plurality of preset gray scales, i is not greater than N, and i and j are both positive integers; and obtaining a data voltage compensation parameter corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels.

In some embodiments, the data voltage compensation parameter determining module is specifically configured to calculate a relationship parameter between a third data voltage value corresponding to the ith test display panel at the jth gray scale and a fourth data voltage value corresponding to the ith test display panel at the jth gray scale, where the relationship parameter includes a difference value or a ratio value; and obtaining a data voltage compensation parameter corresponding to the jth gray scale according to N relation parameters corresponding to the jth gray scale of the N test display panels, wherein the N relation parameters correspond to the N test display panels one by one.

In some embodiments, the data voltage compensation parameter determining module is specifically configured to calculate an average value of the N relationship parameters, and use the average value of the N relationship parameters as the data voltage compensation parameter corresponding to the jth gray scale; or acquiring median of the N relational parameters, and taking the median of the N relational parameters as a data voltage compensation parameter corresponding to the jth gray scale; or obtaining the mode of the N relational parameters, and taking the mode of the N relational parameters as the data voltage compensation parameter corresponding to the jth gray scale.

In some embodiments, the data voltage compensation parameter determining module is specifically configured to select M1 gray scales from preset M gray scales as a first gray scale, M1 is greater than M, and M1 and M are positive integers; acquiring a data voltage compensation parameter corresponding to each gray scale in the first gray scale; and processing the data voltage compensation parameter corresponding to each gray scale in the first gray scale based on a linear interpolation algorithm to obtain data voltage compensation parameters corresponding to other gray scales except the first gray scale in the M gray scales.

In some embodiments, the second determining module 603 is specifically configured to determine the data voltage value corresponding to the first luminance level at the current gray scale according to the following expression:

In some embodiments, the display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the second data voltage value includes a first sub-data voltage value corresponding to the red sub-pixel, a second sub-data voltage value corresponding to the green sub-pixel, and a third sub-data voltage value corresponding to the blue sub-pixel; the second determining module 603 is specifically configured to: determining a data voltage value corresponding to the red sub-pixel of the first brightness level under the current gray scale according to the first sub-data voltage value, the first brightness level and the second brightness level; determining a data voltage value corresponding to the green sub-pixel of the first brightness level under the current gray scale according to the second sub-data voltage value, the first brightness level and the second brightness level; and determining the data voltage value corresponding to the blue sub-pixel of the first brightness level under the current gray scale according to the third sub-data voltage value, the first brightness level and the second brightness level.

Based on the driving method of the display panel provided by the above embodiment, correspondingly, the application further provides a specific implementation manner of the electronic device. Please see the examples below.

Fig. 8 shows a hardware structure diagram of an electronic device provided in an embodiment of the present application.

The electronic device may include a processor 701 and a memory 702 storing computer program instructions.

Specifically, the processor 701 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present Application.

Memory 702 may include a mass storage for data or instructions. By way of example, and not limitation, memory 702 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. In one example, memory 702 may include removable or non-removable (or fixed) media, or memory 702 is non-volatile solid-state memory. The memory 702 may be internal or external to the integrated gateway disaster recovery device.

In one example, the Memory 702 may be a Read Only Memory (ROM). In one example, the ROM may be mask programmed ROM, programmable ROM (prom), erasable prom (eprom), electrically erasable prom (eeprom), electrically rewritable ROM (earom), or flash memory, or a combination of two or more of these.

Memory 702 may include Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the methods according to an aspect of the application.

The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement the method/steps in the above method embodiment, and achieve the corresponding technical effect achieved by the method/steps executed by the above method embodiment, which is not described herein again for brevity.

In one example, the electronic device may also include a communication interface 703 and a bus 710. As shown in fig. 8, the processor 701, the memory 702, and the communication interface 703 are connected by a bus 710 to complete mutual communication.

The communication interface 703 is mainly used for implementing communication between modules, apparatuses, units and/or devices in this embodiment of the application.

Bus 710 includes hardware, software, or both to couple the components of the electronic device to each other. By way of example, and not limitation, a Bus may include an Accelerated Graphics Port (AGP) or other Graphics Bus, an Enhanced Industry Standard Architecture (EISA) Bus, a Front-Side Bus (Front Side Bus, FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) Bus, an infiniband interconnect, a Low Pin Count (LPC) Bus, a memory Bus, a Micro Channel Architecture (MCA) Bus, a Peripheral Component Interconnect (PCI) Bus, a PCI-Express (PCI-X) Bus, a Serial Advanced Technology Attachment (SATA) Bus, a video electronics standards association local (VLB) Bus, or other suitable Bus or a combination of two or more of these. Bus 710 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.

In addition, in combination with the driving method of the display panel in the above embodiments, the embodiments of the present application may be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement a method of driving a display panel as in any of the above embodiments. Examples of computer readable storage media include non-transitory computer readable storage media such as electronic circuits, semiconductor memory devices, ROMs, random access memories, flash memories, erasable ROMs (eroms), floppy disks, CD-ROMs, optical disks, and hard disks.

It is to be understood that the present application is not limited to the particular arrangements and instrumentality described above and shown in the attached drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions or change the order between the steps after comprehending the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic Circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.

As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.

Claims

1. A method of driving a display panel, comprising:

under the condition that the first brightness level is less than or equal to a predetermined second brightness level, acquiring a first data voltage value corresponding to the second brightness level under the current gray scale and a predetermined data voltage compensation parameter corresponding to the current gray scale;

correcting the first data voltage value according to the data voltage compensation parameter to obtain a second data voltage value after the second brightness level is corrected;

determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level;

and driving the sub-pixels in the display panel to emit light based on the data voltage value corresponding to the first brightness level under the current gray scale.

2. The method of claim 1, wherein before the obtaining the first data voltage value corresponding to the second brightness level at the current gray scale and the predetermined data voltage compensation parameter corresponding to the current gray scale, the method further comprises:

obtaining N test display panels, wherein N is a positive integer;

determining a third brightness level of each test display panel in a first state under a target gray scale, wherein the first state comprises that the absolute value of the difference value between the color coordinate of the test display panel and a preset reference color coordinate is equal to a preset error threshold;

and obtaining the second brightness grade according to the third brightness grades of the N test display panels.

3. The method according to claim 2, wherein the obtaining the second brightness level according to the third brightness levels of the N test display panels specifically comprises:

calculating an average value of the N third brightness levels, wherein the average value is used as the second brightness level, and the N third brightness levels correspond to the N test display panels one to one; or,

obtaining median of N third brightness levels, and taking the median as the second brightness level; or,

and obtaining the mode of the N third brightness levels, and taking the mode as the second brightness level.

4. The method of claim 2, wherein after said obtaining N test display panels, the method further comprises:

for an ith test display panel, acquiring a third data voltage value and a fourth data voltage value corresponding to a jth gray scale of the ith test display panel when the ith test display panel is at a third brightness level corresponding to the ith test display panel, wherein the third data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in the first state, the fourth data voltage value is a data voltage value of the ith test display panel when the ith test display panel is in the second state, the second state comprises that an absolute value of a difference value between a color coordinate of the ith test display panel and a preset reference color coordinate is smaller than a preset error threshold, the jth gray scale is any gray scale of a plurality of preset gray scales, i is not more than N, and i and j are positive integers;

and obtaining a data voltage compensation parameter corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels.

5. The method according to claim 4, wherein the obtaining of the data voltage compensation parameter corresponding to the jth gray scale according to the third data voltage value and the fourth data voltage value corresponding to the jth gray scale of the N test display panels specifically comprises:

calculating a relation parameter between the third data voltage value corresponding to the jth gray scale of the ith test display panel and the fourth data voltage value corresponding to the jth gray scale of the ith test display panel, wherein the relation parameter comprises a difference value or a ratio value;

obtaining data voltage compensation parameters corresponding to the jth gray scale according to N relation parameters corresponding to the jth gray scale of N test display panels, wherein the N relation parameters correspond to the N test display panels one by one;

preferably, the obtaining of the data voltage compensation parameter corresponding to the jth gray scale according to the N relationship parameters corresponding to the jth gray scale of the N test display panels specifically includes:

calculating the average value of N relation parameters, and taking the average value of the N relation parameters as a data voltage compensation parameter corresponding to the jth gray scale; or,

obtaining N median values of the relation parameters, and taking the N median values of the relation parameters as data voltage compensation parameters corresponding to the jth gray scale; or,

and obtaining the mode of N relation parameters, and taking the mode of the N relation parameters as the data voltage compensation parameter corresponding to the jth gray scale.

6. The method of claim 1, wherein before the obtaining the first data voltage value corresponding to the second brightness level at the current gray scale and the predetermined data voltage compensation parameter corresponding to the current gray scale, the method further comprises:

selecting M1 gray scales as first gray scales from preset M gray scales, wherein M1 is more than M, and M1 and M are positive integers;

acquiring data voltage compensation parameters corresponding to each gray scale in the first gray scale;

and processing the data voltage compensation parameter corresponding to each gray scale in the first gray scale based on a linear interpolation algorithm to obtain data voltage compensation parameters corresponding to other gray scales except the first gray scale in the M gray scales.

7. The method according to claim 1, wherein determining the data voltage value corresponding to the first luminance level at the current gray level according to the second data voltage value, the first luminance level and the second luminance level comprises:

determining a data voltage value corresponding to the first brightness level at the current gray scale according to the following expression:

wherein Vdata represents a data voltage value corresponding to the first luminance level at the current gray level, k represents a preset correction coefficient, L1 represents the first luminance level, L2 represents the second luminance level, and Vdata2 represents the second data voltage value.

8. The method of claim 1, wherein the display panel comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the second data voltage value comprises a first sub-data voltage value corresponding to the red sub-pixel, a second sub-data voltage value corresponding to the green sub-pixel, and a third sub-data voltage value corresponding to the blue sub-pixel;

determining a data voltage value corresponding to the first brightness level under the current gray scale according to the second data voltage value, the first brightness level and the second brightness level, specifically including:

determining a data voltage value corresponding to the red sub-pixel of the first brightness level under the current gray scale according to the first sub-data voltage value, the first brightness level and the second brightness level;

determining a data voltage value corresponding to the green sub-pixel of the first brightness level under the current gray scale according to the second sub-data voltage value, the first brightness level and the second brightness level;

and determining a data voltage value corresponding to the blue sub-pixel of the first brightness level under the current gray scale according to the third sub-data voltage value, the first brightness level and the second brightness level.

9. An electronic device, characterized in that the electronic device comprises: processor, memory and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of driving a display panel according to any one of claims 1 to 8.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, realizes the steps of the driving method of the display panel according to any one of claims 1 to 8.